6551 lines
189 KiB
C
6551 lines
189 KiB
C
/* POWER/PowerPC XCOFF linker support.
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Copyright 1995, 1996, 1997 Free Software Foundation, Inc.
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Written by Ian Lance Taylor <ian@cygnus.com>, Cygnus Support.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "bfdlink.h"
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#include "libbfd.h"
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#include "coff/internal.h"
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#include "libcoff.h"
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/* This file holds the XCOFF linker code. */
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#define STRING_SIZE_SIZE (4)
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/* In order to support linking different object file formats into an
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XCOFF format, we need to be able to determine whether a particular
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bfd_target is an XCOFF vector. FIXME: We need to rethink this
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whole approach. */
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#define XCOFF_XVECP(xv) \
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(strcmp ((xv)->name, "aixcoff-rs6000") == 0 \
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|| strcmp ((xv)->name, "xcoff-powermac") == 0)
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/* Get the XCOFF hash table entries for a BFD. */
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#define obj_xcoff_sym_hashes(bfd) \
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((struct xcoff_link_hash_entry **) obj_coff_sym_hashes (bfd))
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/* XCOFF relocation types. These probably belong in a header file
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somewhere. The relocations are described in the function
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_bfd_ppc_xcoff_relocate_section in this file. */
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#define R_POS (0x00)
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#define R_NEG (0x01)
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#define R_REL (0x02)
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#define R_TOC (0x03)
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#define R_RTB (0x04)
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#define R_GL (0x05)
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#define R_TCL (0x06)
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#define R_BA (0x08)
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#define R_BR (0x0a)
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#define R_RL (0x0c)
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#define R_RLA (0x0d)
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#define R_REF (0x0f)
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#define R_TRL (0x12)
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#define R_TRLA (0x13)
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#define R_RRTBI (0x14)
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#define R_RRTBA (0x15)
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#define R_CAI (0x16)
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#define R_CREL (0x17)
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#define R_RBA (0x18)
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#define R_RBAC (0x19)
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#define R_RBR (0x1a)
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#define R_RBRC (0x1b)
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/* The first word of global linkage code. This must be modified by
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filling in the correct TOC offset. */
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#define XCOFF_GLINK_FIRST (0x81820000) /* lwz r12,0(r2) */
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/* The remaining words of global linkage code. */
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static unsigned long xcoff_glink_code[] =
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{
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0x90410014, /* stw r2,20(r1) */
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0x800c0000, /* lwz r0,0(r12) */
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0x804c0004, /* lwz r2,4(r12) */
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0x7c0903a6, /* mtctr r0 */
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0x4e800420, /* bctr */
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0x0, /* start of traceback table */
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0x000c8000, /* traceback table */
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0x0 /* traceback table */
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};
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#define XCOFF_GLINK_SIZE \
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(((sizeof xcoff_glink_code / sizeof xcoff_glink_code[0]) * 4) + 4)
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/* We reuse the SEC_ROM flag as a mark flag for garbage collection.
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This flag will only be used on input sections. */
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#define SEC_MARK (SEC_ROM)
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/* The ldhdr structure. This appears at the start of the .loader
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section. */
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struct internal_ldhdr
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{
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/* The version number: currently always 1. */
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unsigned long l_version;
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/* The number of symbol table entries. */
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bfd_size_type l_nsyms;
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/* The number of relocation table entries. */
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bfd_size_type l_nreloc;
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/* The length of the import file string table. */
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bfd_size_type l_istlen;
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/* The number of import files. */
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bfd_size_type l_nimpid;
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/* The offset from the start of the .loader section to the first
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entry in the import file table. */
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bfd_size_type l_impoff;
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/* The length of the string table. */
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bfd_size_type l_stlen;
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/* The offset from the start of the .loader section to the first
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entry in the string table. */
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bfd_size_type l_stoff;
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};
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struct external_ldhdr
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{
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bfd_byte l_version[4];
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bfd_byte l_nsyms[4];
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bfd_byte l_nreloc[4];
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bfd_byte l_istlen[4];
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bfd_byte l_nimpid[4];
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bfd_byte l_impoff[4];
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bfd_byte l_stlen[4];
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bfd_byte l_stoff[4];
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};
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#define LDHDRSZ (8 * 4)
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/* The ldsym structure. This is used to represent a symbol in the
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.loader section. */
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struct internal_ldsym
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{
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union
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{
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/* The symbol name if <= SYMNMLEN characters. */
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char _l_name[SYMNMLEN];
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struct
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{
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/* Zero if the symbol name is more than SYMNMLEN characters. */
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long _l_zeroes;
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/* The offset in the string table if the symbol name is more
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than SYMNMLEN characters. */
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long _l_offset;
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} _l_l;
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} _l;
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/* The symbol value. */
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bfd_vma l_value;
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/* The symbol section number. */
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short l_scnum;
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/* The symbol type and flags. */
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char l_smtype;
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/* The symbol storage class. */
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char l_smclas;
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/* The import file ID. */
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bfd_size_type l_ifile;
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/* Offset to the parameter type check string. */
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bfd_size_type l_parm;
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};
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struct external_ldsym
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{
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union
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{
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bfd_byte _l_name[SYMNMLEN];
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struct
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{
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bfd_byte _l_zeroes[4];
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bfd_byte _l_offset[4];
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} _l_l;
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} _l;
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bfd_byte l_value[4];
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bfd_byte l_scnum[2];
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bfd_byte l_smtype[1];
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bfd_byte l_smclas[1];
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bfd_byte l_ifile[4];
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bfd_byte l_parm[4];
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};
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#define LDSYMSZ (8 + 3 * 4 + 2 + 2)
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/* These flags are for the l_smtype field (the lower three bits are an
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XTY_* value). */
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/* Imported symbol. */
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#define L_IMPORT (0x40)
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/* Entry point. */
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#define L_ENTRY (0x20)
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/* Exported symbol. */
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#define L_EXPORT (0x10)
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/* The ldrel structure. This is used to represent a reloc in the
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.loader section. */
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struct internal_ldrel
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{
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/* The reloc address. */
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bfd_vma l_vaddr;
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/* The symbol table index in the .loader section symbol table. */
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bfd_size_type l_symndx;
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/* The relocation type and size. */
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short l_rtype;
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/* The section number this relocation applies to. */
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short l_rsecnm;
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};
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struct external_ldrel
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{
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bfd_byte l_vaddr[4];
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bfd_byte l_symndx[4];
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bfd_byte l_rtype[2];
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bfd_byte l_rsecnm[2];
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};
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#define LDRELSZ (2 * 4 + 2 * 2)
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/* The list of import files. */
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struct xcoff_import_file
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{
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/* The next entry in the list. */
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struct xcoff_import_file *next;
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/* The path. */
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const char *path;
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/* The file name. */
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const char *file;
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/* The member name. */
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const char *member;
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};
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/* An entry in the XCOFF linker hash table. */
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struct xcoff_link_hash_entry
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{
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struct bfd_link_hash_entry root;
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/* Symbol index in output file. Set to -1 initially. Set to -2 if
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there is a reloc against this symbol. */
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long indx;
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/* If we have created a TOC entry for this symbol, this is the .tc
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section which holds it. */
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asection *toc_section;
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union
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{
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/* If we have created a TOC entry (the XCOFF_SET_TOC flag is
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set), this is the offset in toc_section. */
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bfd_vma toc_offset;
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/* If the TOC entry comes from an input file, this is set to the
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symbol index of the C_HIDEXT XMC_TC or XMC_TD symbol. */
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long toc_indx;
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} u;
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/* If this symbol is a function entry point which is called, this
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field holds a pointer to the function descriptor. If this symbol
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is a function descriptor, this field holds a pointer to the
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function entry point. */
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struct xcoff_link_hash_entry *descriptor;
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/* The .loader symbol table entry, if there is one. */
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struct internal_ldsym *ldsym;
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/* If XCOFF_BUILT_LDSYM is set, this is the .loader symbol table
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index. If XCOFF_BUILD_LDSYM is clear, and XCOFF_IMPORT is set,
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this is the l_ifile value. */
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long ldindx;
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/* Some linker flags. */
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unsigned short flags;
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/* Symbol is referenced by a regular object. */
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#define XCOFF_REF_REGULAR (01)
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/* Symbol is defined by a regular object. */
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#define XCOFF_DEF_REGULAR (02)
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/* Symbol is defined by a dynamic object. */
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#define XCOFF_DEF_DYNAMIC (04)
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/* Symbol is used in a reloc being copied into the .loader section. */
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#define XCOFF_LDREL (010)
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/* Symbol is the entry point. */
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#define XCOFF_ENTRY (020)
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/* Symbol is called; this is, it appears in a R_BR reloc. */
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#define XCOFF_CALLED (040)
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/* Symbol needs the TOC entry filled in. */
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#define XCOFF_SET_TOC (0100)
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/* Symbol is explicitly imported. */
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#define XCOFF_IMPORT (0200)
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/* Symbol is explicitly exported. */
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#define XCOFF_EXPORT (0400)
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/* Symbol has been processed by xcoff_build_ldsyms. */
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#define XCOFF_BUILT_LDSYM (01000)
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/* Symbol is mentioned by a section which was not garbage collected. */
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#define XCOFF_MARK (02000)
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/* Symbol size is recorded in size_list list from hash table. */
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#define XCOFF_HAS_SIZE (04000)
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/* Symbol is a function descriptor. */
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#define XCOFF_DESCRIPTOR (010000)
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/* Multiple definitions have been for the symbol. */
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#define XCOFF_MULTIPLY_DEFINED (020000)
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/* The storage mapping class. */
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unsigned char smclas;
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};
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/* The XCOFF linker hash table. */
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struct xcoff_link_hash_table
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{
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struct bfd_link_hash_table root;
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/* The .debug string hash table. We need to compute this while
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reading the input files, so that we know how large the .debug
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section will be before we assign section positions. */
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struct bfd_strtab_hash *debug_strtab;
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/* The .debug section we will use for the final output. */
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asection *debug_section;
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/* The .loader section we will use for the final output. */
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asection *loader_section;
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/* A count of non TOC relative relocs which will need to be
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allocated in the .loader section. */
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size_t ldrel_count;
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/* The .loader section header. */
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struct internal_ldhdr ldhdr;
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/* The .gl section we use to hold global linkage code. */
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asection *linkage_section;
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/* The .tc section we use to hold toc entries we build for global
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linkage code. */
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asection *toc_section;
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/* The .ds section we use to hold function descriptors which we
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create for exported symbols. */
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asection *descriptor_section;
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/* The list of import files. */
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struct xcoff_import_file *imports;
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/* Required alignment of sections within the output file. */
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unsigned long file_align;
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/* Whether the .text section must be read-only. */
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boolean textro;
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/* Whether garbage collection was done. */
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boolean gc;
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/* A linked list of symbols for which we have size information. */
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struct xcoff_link_size_list
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{
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struct xcoff_link_size_list *next;
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struct xcoff_link_hash_entry *h;
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bfd_size_type size;
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} *size_list;
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/* Magic sections: _text, _etext, _data, _edata, _end, end. */
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asection *special_sections[6];
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};
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/* Information we keep for each section in the output file during the
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final link phase. */
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struct xcoff_link_section_info
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{
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/* The relocs to be output. */
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struct internal_reloc *relocs;
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/* For each reloc against a global symbol whose index was not known
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when the reloc was handled, the global hash table entry. */
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struct xcoff_link_hash_entry **rel_hashes;
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/* If there is a TOC relative reloc against a global symbol, and the
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index of the TOC symbol is not known when the reloc was handled,
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an entry is added to this linked list. This is not an array,
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like rel_hashes, because this case is quite uncommon. */
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struct xcoff_toc_rel_hash
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{
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struct xcoff_toc_rel_hash *next;
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struct xcoff_link_hash_entry *h;
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struct internal_reloc *rel;
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} *toc_rel_hashes;
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};
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/* Information that we pass around while doing the final link step. */
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struct xcoff_final_link_info
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{
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/* General link information. */
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struct bfd_link_info *info;
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/* Output BFD. */
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bfd *output_bfd;
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/* Hash table for long symbol names. */
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struct bfd_strtab_hash *strtab;
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/* Array of information kept for each output section, indexed by the
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target_index field. */
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struct xcoff_link_section_info *section_info;
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/* Symbol index of last C_FILE symbol (-1 if none). */
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long last_file_index;
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/* Contents of last C_FILE symbol. */
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struct internal_syment last_file;
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/* Symbol index of TOC symbol. */
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long toc_symindx;
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/* Start of .loader symbols. */
|
||
struct external_ldsym *ldsym;
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||
/* Next .loader reloc to swap out. */
|
||
struct external_ldrel *ldrel;
|
||
/* File position of start of line numbers. */
|
||
file_ptr line_filepos;
|
||
/* Buffer large enough to hold swapped symbols of any input file. */
|
||
struct internal_syment *internal_syms;
|
||
/* Buffer large enough to hold output indices of symbols of any
|
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input file. */
|
||
long *sym_indices;
|
||
/* Buffer large enough to hold output symbols for any input file. */
|
||
bfd_byte *outsyms;
|
||
/* Buffer large enough to hold external line numbers for any input
|
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section. */
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||
bfd_byte *linenos;
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||
/* Buffer large enough to hold any input section. */
|
||
bfd_byte *contents;
|
||
/* Buffer large enough to hold external relocs of any input section. */
|
||
bfd_byte *external_relocs;
|
||
};
|
||
|
||
static void xcoff_swap_ldhdr_in
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PARAMS ((bfd *, const struct external_ldhdr *, struct internal_ldhdr *));
|
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static void xcoff_swap_ldhdr_out
|
||
PARAMS ((bfd *, const struct internal_ldhdr *, struct external_ldhdr *));
|
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static void xcoff_swap_ldsym_in
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PARAMS ((bfd *, const struct external_ldsym *, struct internal_ldsym *));
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static void xcoff_swap_ldsym_out
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PARAMS ((bfd *, const struct internal_ldsym *, struct external_ldsym *));
|
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static void xcoff_swap_ldrel_in
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PARAMS ((bfd *, const struct external_ldrel *, struct internal_ldrel *));
|
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static void xcoff_swap_ldrel_out
|
||
PARAMS ((bfd *, const struct internal_ldrel *, struct external_ldrel *));
|
||
static struct bfd_hash_entry *xcoff_link_hash_newfunc
|
||
PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
|
||
static boolean xcoff_get_section_contents PARAMS ((bfd *, asection *));
|
||
static struct internal_reloc *xcoff_read_internal_relocs
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||
PARAMS ((bfd *, asection *, boolean, bfd_byte *, boolean,
|
||
struct internal_reloc *));
|
||
static boolean xcoff_link_add_object_symbols
|
||
PARAMS ((bfd *, struct bfd_link_info *));
|
||
static boolean xcoff_link_check_archive_element
|
||
PARAMS ((bfd *, struct bfd_link_info *, boolean *));
|
||
static boolean xcoff_link_check_ar_symbols
|
||
PARAMS ((bfd *, struct bfd_link_info *, boolean *));
|
||
static boolean xcoff_link_check_dynamic_ar_symbols
|
||
PARAMS ((bfd *, struct bfd_link_info *, boolean *));
|
||
static bfd_size_type xcoff_find_reloc
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PARAMS ((struct internal_reloc *, bfd_size_type, bfd_vma));
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||
static boolean xcoff_link_add_symbols PARAMS ((bfd *, struct bfd_link_info *));
|
||
static boolean xcoff_link_add_dynamic_symbols
|
||
PARAMS ((bfd *, struct bfd_link_info *));
|
||
static boolean xcoff_mark_symbol
|
||
PARAMS ((struct bfd_link_info *, struct xcoff_link_hash_entry *));
|
||
static boolean xcoff_mark PARAMS ((struct bfd_link_info *, asection *));
|
||
static void xcoff_sweep PARAMS ((struct bfd_link_info *));
|
||
static boolean xcoff_build_ldsyms
|
||
PARAMS ((struct xcoff_link_hash_entry *, PTR));
|
||
static boolean xcoff_link_input_bfd
|
||
PARAMS ((struct xcoff_final_link_info *, bfd *));
|
||
static boolean xcoff_write_global_symbol
|
||
PARAMS ((struct xcoff_link_hash_entry *, PTR));
|
||
static boolean xcoff_reloc_link_order
|
||
PARAMS ((bfd *, struct xcoff_final_link_info *, asection *,
|
||
struct bfd_link_order *));
|
||
static int xcoff_sort_relocs PARAMS ((const PTR, const PTR));
|
||
|
||
/* Routines to swap information in the XCOFF .loader section. If we
|
||
ever need to write an XCOFF loader, this stuff will need to be
|
||
moved to another file shared by the linker (which XCOFF calls the
|
||
``binder'') and the loader. */
|
||
|
||
/* Swap in the ldhdr structure. */
|
||
|
||
static void
|
||
xcoff_swap_ldhdr_in (abfd, src, dst)
|
||
bfd *abfd;
|
||
const struct external_ldhdr *src;
|
||
struct internal_ldhdr *dst;
|
||
{
|
||
dst->l_version = bfd_get_32 (abfd, src->l_version);
|
||
dst->l_nsyms = bfd_get_32 (abfd, src->l_nsyms);
|
||
dst->l_nreloc = bfd_get_32 (abfd, src->l_nreloc);
|
||
dst->l_istlen = bfd_get_32 (abfd, src->l_istlen);
|
||
dst->l_nimpid = bfd_get_32 (abfd, src->l_nimpid);
|
||
dst->l_impoff = bfd_get_32 (abfd, src->l_impoff);
|
||
dst->l_stlen = bfd_get_32 (abfd, src->l_stlen);
|
||
dst->l_stoff = bfd_get_32 (abfd, src->l_stoff);
|
||
}
|
||
|
||
/* Swap out the ldhdr structure. */
|
||
|
||
static void
|
||
xcoff_swap_ldhdr_out (abfd, src, dst)
|
||
bfd *abfd;
|
||
const struct internal_ldhdr *src;
|
||
struct external_ldhdr *dst;
|
||
{
|
||
bfd_put_32 (abfd, src->l_version, dst->l_version);
|
||
bfd_put_32 (abfd, src->l_nsyms, dst->l_nsyms);
|
||
bfd_put_32 (abfd, src->l_nreloc, dst->l_nreloc);
|
||
bfd_put_32 (abfd, src->l_istlen, dst->l_istlen);
|
||
bfd_put_32 (abfd, src->l_nimpid, dst->l_nimpid);
|
||
bfd_put_32 (abfd, src->l_impoff, dst->l_impoff);
|
||
bfd_put_32 (abfd, src->l_stlen, dst->l_stlen);
|
||
bfd_put_32 (abfd, src->l_stoff, dst->l_stoff);
|
||
}
|
||
|
||
/* Swap in the ldsym structure. */
|
||
|
||
static void
|
||
xcoff_swap_ldsym_in (abfd, src, dst)
|
||
bfd *abfd;
|
||
const struct external_ldsym *src;
|
||
struct internal_ldsym *dst;
|
||
{
|
||
if (bfd_get_32 (abfd, src->_l._l_l._l_zeroes) != 0)
|
||
memcpy (dst->_l._l_name, src->_l._l_name, SYMNMLEN);
|
||
else
|
||
{
|
||
dst->_l._l_l._l_zeroes = 0;
|
||
dst->_l._l_l._l_offset = bfd_get_32 (abfd, src->_l._l_l._l_offset);
|
||
}
|
||
dst->l_value = bfd_get_32 (abfd, src->l_value);
|
||
dst->l_scnum = bfd_get_16 (abfd, src->l_scnum);
|
||
dst->l_smtype = bfd_get_8 (abfd, src->l_smtype);
|
||
dst->l_smclas = bfd_get_8 (abfd, src->l_smclas);
|
||
dst->l_ifile = bfd_get_32 (abfd, src->l_ifile);
|
||
dst->l_parm = bfd_get_32 (abfd, src->l_parm);
|
||
}
|
||
|
||
/* Swap out the ldsym structure. */
|
||
|
||
static void
|
||
xcoff_swap_ldsym_out (abfd, src, dst)
|
||
bfd *abfd;
|
||
const struct internal_ldsym *src;
|
||
struct external_ldsym *dst;
|
||
{
|
||
if (src->_l._l_l._l_zeroes != 0)
|
||
memcpy (dst->_l._l_name, src->_l._l_name, SYMNMLEN);
|
||
else
|
||
{
|
||
bfd_put_32 (abfd, 0, dst->_l._l_l._l_zeroes);
|
||
bfd_put_32 (abfd, src->_l._l_l._l_offset, dst->_l._l_l._l_offset);
|
||
}
|
||
bfd_put_32 (abfd, src->l_value, dst->l_value);
|
||
bfd_put_16 (abfd, src->l_scnum, dst->l_scnum);
|
||
bfd_put_8 (abfd, src->l_smtype, dst->l_smtype);
|
||
bfd_put_8 (abfd, src->l_smclas, dst->l_smclas);
|
||
bfd_put_32 (abfd, src->l_ifile, dst->l_ifile);
|
||
bfd_put_32 (abfd, src->l_parm, dst->l_parm);
|
||
}
|
||
|
||
/* Swap in the ldrel structure. */
|
||
|
||
static void
|
||
xcoff_swap_ldrel_in (abfd, src, dst)
|
||
bfd *abfd;
|
||
const struct external_ldrel *src;
|
||
struct internal_ldrel *dst;
|
||
{
|
||
dst->l_vaddr = bfd_get_32 (abfd, src->l_vaddr);
|
||
dst->l_symndx = bfd_get_32 (abfd, src->l_symndx);
|
||
dst->l_rtype = bfd_get_16 (abfd, src->l_rtype);
|
||
dst->l_rsecnm = bfd_get_16 (abfd, src->l_rsecnm);
|
||
}
|
||
|
||
/* Swap out the ldrel structure. */
|
||
|
||
static void
|
||
xcoff_swap_ldrel_out (abfd, src, dst)
|
||
bfd *abfd;
|
||
const struct internal_ldrel *src;
|
||
struct external_ldrel *dst;
|
||
{
|
||
bfd_put_32 (abfd, src->l_vaddr, dst->l_vaddr);
|
||
bfd_put_32 (abfd, src->l_symndx, dst->l_symndx);
|
||
bfd_put_16 (abfd, src->l_rtype, dst->l_rtype);
|
||
bfd_put_16 (abfd, src->l_rsecnm, dst->l_rsecnm);
|
||
}
|
||
|
||
/* Routines to read XCOFF dynamic information. This don't really
|
||
belong here, but we already have the ldsym manipulation routines
|
||
here. */
|
||
|
||
/* Read the contents of a section. */
|
||
|
||
static boolean
|
||
xcoff_get_section_contents (abfd, sec)
|
||
bfd *abfd;
|
||
asection *sec;
|
||
{
|
||
if (coff_section_data (abfd, sec) == NULL)
|
||
{
|
||
sec->used_by_bfd = bfd_zalloc (abfd,
|
||
sizeof (struct coff_section_tdata));
|
||
if (sec->used_by_bfd == NULL)
|
||
return false;
|
||
}
|
||
|
||
if (coff_section_data (abfd, sec)->contents == NULL)
|
||
{
|
||
coff_section_data (abfd, sec)->contents = bfd_malloc (sec->_raw_size);
|
||
if (coff_section_data (abfd, sec)->contents == NULL)
|
||
return false;
|
||
|
||
if (! bfd_get_section_contents (abfd, sec,
|
||
coff_section_data (abfd, sec)->contents,
|
||
(file_ptr) 0, sec->_raw_size))
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Get the size required to hold the dynamic symbols. */
|
||
|
||
long
|
||
_bfd_xcoff_get_dynamic_symtab_upper_bound (abfd)
|
||
bfd *abfd;
|
||
{
|
||
asection *lsec;
|
||
bfd_byte *contents;
|
||
struct internal_ldhdr ldhdr;
|
||
|
||
if ((abfd->flags & DYNAMIC) == 0)
|
||
{
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
return -1;
|
||
}
|
||
|
||
lsec = bfd_get_section_by_name (abfd, ".loader");
|
||
if (lsec == NULL)
|
||
{
|
||
bfd_set_error (bfd_error_no_symbols);
|
||
return -1;
|
||
}
|
||
|
||
if (! xcoff_get_section_contents (abfd, lsec))
|
||
return -1;
|
||
contents = coff_section_data (abfd, lsec)->contents;
|
||
|
||
xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr);
|
||
|
||
return (ldhdr.l_nsyms + 1) * sizeof (asymbol *);
|
||
}
|
||
|
||
/* Get the dynamic symbols. */
|
||
|
||
long
|
||
_bfd_xcoff_canonicalize_dynamic_symtab (abfd, psyms)
|
||
bfd *abfd;
|
||
asymbol **psyms;
|
||
{
|
||
asection *lsec;
|
||
bfd_byte *contents;
|
||
struct internal_ldhdr ldhdr;
|
||
const char *strings;
|
||
struct external_ldsym *elsym, *elsymend;
|
||
coff_symbol_type *symbuf;
|
||
|
||
if ((abfd->flags & DYNAMIC) == 0)
|
||
{
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
return -1;
|
||
}
|
||
|
||
lsec = bfd_get_section_by_name (abfd, ".loader");
|
||
if (lsec == NULL)
|
||
{
|
||
bfd_set_error (bfd_error_no_symbols);
|
||
return -1;
|
||
}
|
||
|
||
if (! xcoff_get_section_contents (abfd, lsec))
|
||
return -1;
|
||
contents = coff_section_data (abfd, lsec)->contents;
|
||
|
||
coff_section_data (abfd, lsec)->keep_contents = true;
|
||
|
||
xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr);
|
||
|
||
strings = (char *) contents + ldhdr.l_stoff;
|
||
|
||
symbuf = ((coff_symbol_type *)
|
||
bfd_zalloc (abfd, ldhdr.l_nsyms * sizeof (coff_symbol_type)));
|
||
if (symbuf == NULL)
|
||
return -1;
|
||
|
||
elsym = (struct external_ldsym *) (contents + LDHDRSZ);
|
||
elsymend = elsym + ldhdr.l_nsyms;
|
||
for (; elsym < elsymend; elsym++, symbuf++, psyms++)
|
||
{
|
||
struct internal_ldsym ldsym;
|
||
|
||
xcoff_swap_ldsym_in (abfd, elsym, &ldsym);
|
||
|
||
symbuf->symbol.the_bfd = abfd;
|
||
|
||
if (ldsym._l._l_l._l_zeroes == 0)
|
||
symbuf->symbol.name = strings + ldsym._l._l_l._l_offset;
|
||
else
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; i < SYMNMLEN; i++)
|
||
if (ldsym._l._l_name[i] == '\0')
|
||
break;
|
||
if (i < SYMNMLEN)
|
||
symbuf->symbol.name = elsym->_l._l_name;
|
||
else
|
||
{
|
||
char *c;
|
||
|
||
c = bfd_alloc (abfd, SYMNMLEN + 1);
|
||
if (c == NULL)
|
||
return -1;
|
||
memcpy (c, ldsym._l._l_name, SYMNMLEN);
|
||
c[SYMNMLEN] = '\0';
|
||
symbuf->symbol.name = c;
|
||
}
|
||
}
|
||
|
||
if (ldsym.l_smclas == XMC_XO)
|
||
symbuf->symbol.section = bfd_abs_section_ptr;
|
||
else
|
||
symbuf->symbol.section = coff_section_from_bfd_index (abfd,
|
||
ldsym.l_scnum);
|
||
symbuf->symbol.value = ldsym.l_value - symbuf->symbol.section->vma;
|
||
|
||
symbuf->symbol.flags = BSF_NO_FLAGS;
|
||
if ((ldsym.l_smtype & L_EXPORT) != 0)
|
||
symbuf->symbol.flags |= BSF_GLOBAL;
|
||
|
||
/* FIXME: We have no way to record the other information stored
|
||
with the loader symbol. */
|
||
|
||
*psyms = (asymbol *) symbuf;
|
||
}
|
||
|
||
*psyms = NULL;
|
||
|
||
return ldhdr.l_nsyms;
|
||
}
|
||
|
||
/* Get the size required to hold the dynamic relocs. */
|
||
|
||
long
|
||
_bfd_xcoff_get_dynamic_reloc_upper_bound (abfd)
|
||
bfd *abfd;
|
||
{
|
||
asection *lsec;
|
||
bfd_byte *contents;
|
||
struct internal_ldhdr ldhdr;
|
||
|
||
if ((abfd->flags & DYNAMIC) == 0)
|
||
{
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
return -1;
|
||
}
|
||
|
||
lsec = bfd_get_section_by_name (abfd, ".loader");
|
||
if (lsec == NULL)
|
||
{
|
||
bfd_set_error (bfd_error_no_symbols);
|
||
return -1;
|
||
}
|
||
|
||
if (! xcoff_get_section_contents (abfd, lsec))
|
||
return -1;
|
||
contents = coff_section_data (abfd, lsec)->contents;
|
||
|
||
xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr);
|
||
|
||
return (ldhdr.l_nreloc + 1) * sizeof (arelent *);
|
||
}
|
||
|
||
/* The typical dynamic reloc. */
|
||
|
||
static reloc_howto_type xcoff_dynamic_reloc =
|
||
HOWTO (0, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
0, /* special_function */
|
||
"R_POS", /* name */
|
||
true, /* partial_inplace */
|
||
0xffffffff, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
false); /* pcrel_offset */
|
||
|
||
/* Get the dynamic relocs. */
|
||
|
||
long
|
||
_bfd_xcoff_canonicalize_dynamic_reloc (abfd, prelocs, syms)
|
||
bfd *abfd;
|
||
arelent **prelocs;
|
||
asymbol **syms;
|
||
{
|
||
asection *lsec;
|
||
bfd_byte *contents;
|
||
struct internal_ldhdr ldhdr;
|
||
arelent *relbuf;
|
||
struct external_ldrel *elrel, *elrelend;
|
||
|
||
if ((abfd->flags & DYNAMIC) == 0)
|
||
{
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
return -1;
|
||
}
|
||
|
||
lsec = bfd_get_section_by_name (abfd, ".loader");
|
||
if (lsec == NULL)
|
||
{
|
||
bfd_set_error (bfd_error_no_symbols);
|
||
return -1;
|
||
}
|
||
|
||
if (! xcoff_get_section_contents (abfd, lsec))
|
||
return -1;
|
||
contents = coff_section_data (abfd, lsec)->contents;
|
||
|
||
xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr);
|
||
|
||
relbuf = (arelent *) bfd_alloc (abfd, ldhdr.l_nreloc * sizeof (arelent));
|
||
if (relbuf == NULL)
|
||
return -1;
|
||
|
||
elrel = ((struct external_ldrel *)
|
||
(contents + LDHDRSZ + ldhdr.l_nsyms * LDSYMSZ));
|
||
elrelend = elrel + ldhdr.l_nreloc;
|
||
for (; elrel < elrelend; elrel++, relbuf++, prelocs++)
|
||
{
|
||
struct internal_ldrel ldrel;
|
||
|
||
xcoff_swap_ldrel_in (abfd, elrel, &ldrel);
|
||
|
||
if (ldrel.l_symndx >= 3)
|
||
relbuf->sym_ptr_ptr = syms + (ldrel.l_symndx - 3);
|
||
else
|
||
{
|
||
const char *name;
|
||
asection *sec;
|
||
|
||
switch (ldrel.l_symndx)
|
||
{
|
||
case 0:
|
||
name = ".text";
|
||
break;
|
||
case 1:
|
||
name = ".data";
|
||
break;
|
||
case 2:
|
||
name = ".bss";
|
||
break;
|
||
default:
|
||
abort ();
|
||
break;
|
||
}
|
||
|
||
sec = bfd_get_section_by_name (abfd, name);
|
||
if (sec == NULL)
|
||
{
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return -1;
|
||
}
|
||
|
||
relbuf->sym_ptr_ptr = sec->symbol_ptr_ptr;
|
||
}
|
||
|
||
relbuf->address = ldrel.l_vaddr;
|
||
relbuf->addend = 0;
|
||
|
||
/* Most dynamic relocs have the same type. FIXME: This is only
|
||
correct if ldrel.l_rtype == 0. In other cases, we should use
|
||
a different howto. */
|
||
relbuf->howto = &xcoff_dynamic_reloc;
|
||
|
||
/* FIXME: We have no way to record the l_rsecnm field. */
|
||
|
||
*prelocs = relbuf;
|
||
}
|
||
|
||
*prelocs = NULL;
|
||
|
||
return ldhdr.l_nreloc;
|
||
}
|
||
|
||
/* Routine to create an entry in an XCOFF link hash table. */
|
||
|
||
static struct bfd_hash_entry *
|
||
xcoff_link_hash_newfunc (entry, table, string)
|
||
struct bfd_hash_entry *entry;
|
||
struct bfd_hash_table *table;
|
||
const char *string;
|
||
{
|
||
struct xcoff_link_hash_entry *ret = (struct xcoff_link_hash_entry *) entry;
|
||
|
||
/* Allocate the structure if it has not already been allocated by a
|
||
subclass. */
|
||
if (ret == (struct xcoff_link_hash_entry *) NULL)
|
||
ret = ((struct xcoff_link_hash_entry *)
|
||
bfd_hash_allocate (table, sizeof (struct xcoff_link_hash_entry)));
|
||
if (ret == (struct xcoff_link_hash_entry *) NULL)
|
||
return (struct bfd_hash_entry *) ret;
|
||
|
||
/* Call the allocation method of the superclass. */
|
||
ret = ((struct xcoff_link_hash_entry *)
|
||
_bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
|
||
table, string));
|
||
if (ret != NULL)
|
||
{
|
||
/* Set local fields. */
|
||
ret->indx = -1;
|
||
ret->toc_section = NULL;
|
||
ret->u.toc_indx = -1;
|
||
ret->descriptor = NULL;
|
||
ret->ldsym = NULL;
|
||
ret->ldindx = -1;
|
||
ret->flags = 0;
|
||
ret->smclas = XMC_UA;
|
||
}
|
||
|
||
return (struct bfd_hash_entry *) ret;
|
||
}
|
||
|
||
/* Create a XCOFF link hash table. */
|
||
|
||
struct bfd_link_hash_table *
|
||
_bfd_xcoff_bfd_link_hash_table_create (abfd)
|
||
bfd *abfd;
|
||
{
|
||
struct xcoff_link_hash_table *ret;
|
||
|
||
ret = ((struct xcoff_link_hash_table *)
|
||
bfd_alloc (abfd, sizeof (struct xcoff_link_hash_table)));
|
||
if (ret == (struct xcoff_link_hash_table *) NULL)
|
||
return (struct bfd_link_hash_table *) NULL;
|
||
if (! _bfd_link_hash_table_init (&ret->root, abfd, xcoff_link_hash_newfunc))
|
||
{
|
||
bfd_release (abfd, ret);
|
||
return (struct bfd_link_hash_table *) NULL;
|
||
}
|
||
|
||
ret->debug_strtab = _bfd_xcoff_stringtab_init ();
|
||
ret->debug_section = NULL;
|
||
ret->loader_section = NULL;
|
||
ret->ldrel_count = 0;
|
||
memset (&ret->ldhdr, 0, sizeof (struct internal_ldhdr));
|
||
ret->linkage_section = NULL;
|
||
ret->toc_section = NULL;
|
||
ret->descriptor_section = NULL;
|
||
ret->imports = NULL;
|
||
ret->file_align = 0;
|
||
ret->textro = false;
|
||
ret->gc = false;
|
||
memset (ret->special_sections, 0, sizeof ret->special_sections);
|
||
|
||
/* The linker will always generate a full a.out header. We need to
|
||
record that fact now, before the sizeof_headers routine could be
|
||
called. */
|
||
xcoff_data (abfd)->full_aouthdr = true;
|
||
|
||
return &ret->root;
|
||
}
|
||
|
||
/* Look up an entry in an XCOFF link hash table. */
|
||
|
||
#define xcoff_link_hash_lookup(table, string, create, copy, follow) \
|
||
((struct xcoff_link_hash_entry *) \
|
||
bfd_link_hash_lookup (&(table)->root, (string), (create), (copy),\
|
||
(follow)))
|
||
|
||
/* Traverse an XCOFF link hash table. */
|
||
|
||
#define xcoff_link_hash_traverse(table, func, info) \
|
||
(bfd_link_hash_traverse \
|
||
(&(table)->root, \
|
||
(boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func), \
|
||
(info)))
|
||
|
||
/* Get the XCOFF link hash table from the info structure. This is
|
||
just a cast. */
|
||
|
||
#define xcoff_hash_table(p) ((struct xcoff_link_hash_table *) ((p)->hash))
|
||
|
||
/* Read internal relocs for an XCOFF csect. This is a wrapper around
|
||
_bfd_coff_read_internal_relocs which tries to take advantage of any
|
||
relocs which may have been cached for the enclosing section. */
|
||
|
||
static struct internal_reloc *
|
||
xcoff_read_internal_relocs (abfd, sec, cache, external_relocs,
|
||
require_internal, internal_relocs)
|
||
bfd *abfd;
|
||
asection *sec;
|
||
boolean cache;
|
||
bfd_byte *external_relocs;
|
||
boolean require_internal;
|
||
struct internal_reloc *internal_relocs;
|
||
{
|
||
if (coff_section_data (abfd, sec) != NULL
|
||
&& coff_section_data (abfd, sec)->relocs == NULL
|
||
&& xcoff_section_data (abfd, sec) != NULL)
|
||
{
|
||
asection *enclosing;
|
||
|
||
enclosing = xcoff_section_data (abfd, sec)->enclosing;
|
||
|
||
if (enclosing != NULL
|
||
&& (coff_section_data (abfd, enclosing) == NULL
|
||
|| coff_section_data (abfd, enclosing)->relocs == NULL)
|
||
&& cache
|
||
&& enclosing->reloc_count > 0)
|
||
{
|
||
if (_bfd_coff_read_internal_relocs (abfd, enclosing, true,
|
||
external_relocs, false,
|
||
(struct internal_reloc *) NULL)
|
||
== NULL)
|
||
return NULL;
|
||
}
|
||
|
||
if (enclosing != NULL
|
||
&& coff_section_data (abfd, enclosing) != NULL
|
||
&& coff_section_data (abfd, enclosing)->relocs != NULL)
|
||
{
|
||
size_t off;
|
||
|
||
off = ((sec->rel_filepos - enclosing->rel_filepos)
|
||
/ bfd_coff_relsz (abfd));
|
||
if (! require_internal)
|
||
return coff_section_data (abfd, enclosing)->relocs + off;
|
||
memcpy (internal_relocs,
|
||
coff_section_data (abfd, enclosing)->relocs + off,
|
||
sec->reloc_count * sizeof (struct internal_reloc));
|
||
return internal_relocs;
|
||
}
|
||
}
|
||
|
||
return _bfd_coff_read_internal_relocs (abfd, sec, cache, external_relocs,
|
||
require_internal, internal_relocs);
|
||
}
|
||
|
||
/* Given an XCOFF BFD, add symbols to the global hash table as
|
||
appropriate. */
|
||
|
||
boolean
|
||
_bfd_xcoff_bfd_link_add_symbols (abfd, info)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
{
|
||
switch (bfd_get_format (abfd))
|
||
{
|
||
case bfd_object:
|
||
return xcoff_link_add_object_symbols (abfd, info);
|
||
|
||
case bfd_archive:
|
||
/* If the archive has a map, do the usual search. We then need
|
||
to check the archive for stripped dynamic objects, because
|
||
they will not appear in the archive map even though they
|
||
should, perhaps, be included. If the archive has no map, we
|
||
just consider each object file in turn, since that apparently
|
||
is what the AIX native linker does. */
|
||
if (bfd_has_map (abfd))
|
||
{
|
||
if (! (_bfd_generic_link_add_archive_symbols
|
||
(abfd, info, xcoff_link_check_archive_element)))
|
||
return false;
|
||
}
|
||
|
||
{
|
||
bfd *member;
|
||
|
||
member = bfd_openr_next_archived_file (abfd, (bfd *) NULL);
|
||
while (member != NULL)
|
||
{
|
||
if (bfd_check_format (member, bfd_object)
|
||
&& (! bfd_has_map (abfd)
|
||
|| ((member->flags & DYNAMIC) != 0
|
||
&& (member->flags & HAS_SYMS) == 0)))
|
||
{
|
||
boolean needed;
|
||
|
||
if (! xcoff_link_check_archive_element (member, info, &needed))
|
||
return false;
|
||
if (needed)
|
||
member->archive_pass = -1;
|
||
}
|
||
member = bfd_openr_next_archived_file (abfd, member);
|
||
}
|
||
}
|
||
|
||
return true;
|
||
|
||
default:
|
||
bfd_set_error (bfd_error_wrong_format);
|
||
return false;
|
||
}
|
||
}
|
||
|
||
/* Add symbols from an XCOFF object file. */
|
||
|
||
static boolean
|
||
xcoff_link_add_object_symbols (abfd, info)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
{
|
||
if (! _bfd_coff_get_external_symbols (abfd))
|
||
return false;
|
||
if (! xcoff_link_add_symbols (abfd, info))
|
||
return false;
|
||
if (! info->keep_memory)
|
||
{
|
||
if (! _bfd_coff_free_symbols (abfd))
|
||
return false;
|
||
}
|
||
return true;
|
||
}
|
||
|
||
/* Check a single archive element to see if we need to include it in
|
||
the link. *PNEEDED is set according to whether this element is
|
||
needed in the link or not. This is called via
|
||
_bfd_generic_link_add_archive_symbols. */
|
||
|
||
static boolean
|
||
xcoff_link_check_archive_element (abfd, info, pneeded)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
boolean *pneeded;
|
||
{
|
||
if (! _bfd_coff_get_external_symbols (abfd))
|
||
return false;
|
||
|
||
if (! xcoff_link_check_ar_symbols (abfd, info, pneeded))
|
||
return false;
|
||
|
||
if (*pneeded)
|
||
{
|
||
if (! xcoff_link_add_symbols (abfd, info))
|
||
return false;
|
||
}
|
||
|
||
if (! info->keep_memory || ! *pneeded)
|
||
{
|
||
if (! _bfd_coff_free_symbols (abfd))
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Look through the symbols to see if this object file should be
|
||
included in the link. */
|
||
|
||
static boolean
|
||
xcoff_link_check_ar_symbols (abfd, info, pneeded)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
boolean *pneeded;
|
||
{
|
||
bfd_size_type symesz;
|
||
bfd_byte *esym;
|
||
bfd_byte *esym_end;
|
||
|
||
*pneeded = false;
|
||
|
||
if ((abfd->flags & DYNAMIC) != 0
|
||
&& ! info->static_link
|
||
&& info->hash->creator == abfd->xvec)
|
||
return xcoff_link_check_dynamic_ar_symbols (abfd, info, pneeded);
|
||
|
||
symesz = bfd_coff_symesz (abfd);
|
||
esym = (bfd_byte *) obj_coff_external_syms (abfd);
|
||
esym_end = esym + obj_raw_syment_count (abfd) * symesz;
|
||
while (esym < esym_end)
|
||
{
|
||
struct internal_syment sym;
|
||
|
||
bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &sym);
|
||
|
||
if (sym.n_sclass == C_EXT && sym.n_scnum != N_UNDEF)
|
||
{
|
||
const char *name;
|
||
char buf[SYMNMLEN + 1];
|
||
struct bfd_link_hash_entry *h;
|
||
|
||
/* This symbol is externally visible, and is defined by this
|
||
object file. */
|
||
|
||
name = _bfd_coff_internal_syment_name (abfd, &sym, buf);
|
||
if (name == NULL)
|
||
return false;
|
||
h = bfd_link_hash_lookup (info->hash, name, false, false, true);
|
||
|
||
/* We are only interested in symbols that are currently
|
||
undefined. If a symbol is currently known to be common,
|
||
XCOFF linkers do not bring in an object file which
|
||
defines it. We also don't bring in symbols to satisfy
|
||
undefined references in shared objects. */
|
||
if (h != (struct bfd_link_hash_entry *) NULL
|
||
&& h->type == bfd_link_hash_undefined
|
||
&& (info->hash->creator != abfd->xvec
|
||
|| (((struct xcoff_link_hash_entry *) h)->flags
|
||
& XCOFF_DEF_DYNAMIC) == 0))
|
||
{
|
||
if (! (*info->callbacks->add_archive_element) (info, abfd, name))
|
||
return false;
|
||
*pneeded = true;
|
||
return true;
|
||
}
|
||
}
|
||
|
||
esym += (sym.n_numaux + 1) * symesz;
|
||
}
|
||
|
||
/* We do not need this object file. */
|
||
return true;
|
||
}
|
||
|
||
/* Look through the loader symbols to see if this dynamic object
|
||
should be included in the link. The native linker uses the loader
|
||
symbols, not the normal symbol table, so we do too. */
|
||
|
||
static boolean
|
||
xcoff_link_check_dynamic_ar_symbols (abfd, info, pneeded)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
boolean *pneeded;
|
||
{
|
||
asection *lsec;
|
||
bfd_byte *buf;
|
||
struct internal_ldhdr ldhdr;
|
||
const char *strings;
|
||
struct external_ldsym *elsym, *elsymend;
|
||
|
||
*pneeded = false;
|
||
|
||
lsec = bfd_get_section_by_name (abfd, ".loader");
|
||
if (lsec == NULL)
|
||
{
|
||
/* There are no symbols, so don't try to include it. */
|
||
return true;
|
||
}
|
||
|
||
if (! xcoff_get_section_contents (abfd, lsec))
|
||
return false;
|
||
buf = coff_section_data (abfd, lsec)->contents;
|
||
|
||
xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) buf, &ldhdr);
|
||
|
||
strings = (char *) buf + ldhdr.l_stoff;
|
||
|
||
elsym = (struct external_ldsym *) (buf + LDHDRSZ);
|
||
elsymend = elsym + ldhdr.l_nsyms;
|
||
for (; elsym < elsymend; elsym++)
|
||
{
|
||
struct internal_ldsym ldsym;
|
||
char nambuf[SYMNMLEN + 1];
|
||
const char *name;
|
||
struct bfd_link_hash_entry *h;
|
||
|
||
xcoff_swap_ldsym_in (abfd, elsym, &ldsym);
|
||
|
||
/* We are only interested in exported symbols. */
|
||
if ((ldsym.l_smtype & L_EXPORT) == 0)
|
||
continue;
|
||
|
||
if (ldsym._l._l_l._l_zeroes == 0)
|
||
name = strings + ldsym._l._l_l._l_offset;
|
||
else
|
||
{
|
||
memcpy (nambuf, ldsym._l._l_name, SYMNMLEN);
|
||
nambuf[SYMNMLEN] = '\0';
|
||
name = nambuf;
|
||
}
|
||
|
||
h = bfd_link_hash_lookup (info->hash, name, false, false, true);
|
||
|
||
/* We are only interested in symbols that are currently
|
||
undefined. At this point we know that we are using an XCOFF
|
||
hash table. */
|
||
if (h != NULL
|
||
&& h->type == bfd_link_hash_undefined
|
||
&& (((struct xcoff_link_hash_entry *) h)->flags
|
||
& XCOFF_DEF_DYNAMIC) == 0)
|
||
{
|
||
if (! (*info->callbacks->add_archive_element) (info, abfd, name))
|
||
return false;
|
||
*pneeded = true;
|
||
return true;
|
||
}
|
||
}
|
||
|
||
/* We do not need this shared object. */
|
||
|
||
if (buf != NULL && ! coff_section_data (abfd, lsec)->keep_contents)
|
||
{
|
||
free (coff_section_data (abfd, lsec)->contents);
|
||
coff_section_data (abfd, lsec)->contents = NULL;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Returns the index of reloc in RELOCS with the least address greater
|
||
than or equal to ADDRESS. The relocs are sorted by address. */
|
||
|
||
static bfd_size_type
|
||
xcoff_find_reloc (relocs, count, address)
|
||
struct internal_reloc *relocs;
|
||
bfd_size_type count;
|
||
bfd_vma address;
|
||
{
|
||
bfd_size_type min, max, this;
|
||
|
||
if (count < 2)
|
||
{
|
||
if (count == 1 && relocs[0].r_vaddr < address)
|
||
return 1;
|
||
else
|
||
return 0;
|
||
}
|
||
|
||
min = 0;
|
||
max = count;
|
||
|
||
/* Do a binary search over (min,max]. */
|
||
while (min + 1 < max)
|
||
{
|
||
bfd_vma raddr;
|
||
|
||
this = (max + min) / 2;
|
||
raddr = relocs[this].r_vaddr;
|
||
if (raddr > address)
|
||
max = this;
|
||
else if (raddr < address)
|
||
min = this;
|
||
else
|
||
{
|
||
min = this;
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (relocs[min].r_vaddr < address)
|
||
return min + 1;
|
||
|
||
while (min > 0
|
||
&& relocs[min - 1].r_vaddr == address)
|
||
--min;
|
||
|
||
return min;
|
||
}
|
||
|
||
/* Add all the symbols from an object file to the hash table.
|
||
|
||
XCOFF is a weird format. A normal XCOFF .o files will have three
|
||
COFF sections--.text, .data, and .bss--but each COFF section will
|
||
contain many csects. These csects are described in the symbol
|
||
table. From the linker's point of view, each csect must be
|
||
considered a section in its own right. For example, a TOC entry is
|
||
handled as a small XMC_TC csect. The linker must be able to merge
|
||
different TOC entries together, which means that it must be able to
|
||
extract the XMC_TC csects from the .data section of the input .o
|
||
file.
|
||
|
||
From the point of view of our linker, this is, of course, a hideous
|
||
nightmare. We cope by actually creating sections for each csect,
|
||
and discarding the original sections. We then have to handle the
|
||
relocation entries carefully, since the only way to tell which
|
||
csect they belong to is to examine the address. */
|
||
|
||
static boolean
|
||
xcoff_link_add_symbols (abfd, info)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
{
|
||
unsigned int n_tmask;
|
||
unsigned int n_btshft;
|
||
boolean default_copy;
|
||
bfd_size_type symcount;
|
||
struct xcoff_link_hash_entry **sym_hash;
|
||
asection **csect_cache;
|
||
bfd_size_type linesz;
|
||
asection *o;
|
||
asection *last_real;
|
||
boolean keep_syms;
|
||
asection *csect;
|
||
unsigned int csect_index;
|
||
asection *first_csect;
|
||
bfd_size_type symesz;
|
||
bfd_byte *esym;
|
||
bfd_byte *esym_end;
|
||
struct reloc_info_struct
|
||
{
|
||
struct internal_reloc *relocs;
|
||
asection **csects;
|
||
bfd_byte *linenos;
|
||
} *reloc_info = NULL;
|
||
|
||
keep_syms = obj_coff_keep_syms (abfd);
|
||
|
||
if ((abfd->flags & DYNAMIC) != 0
|
||
&& ! info->static_link)
|
||
{
|
||
if (! xcoff_link_add_dynamic_symbols (abfd, info))
|
||
return false;
|
||
}
|
||
|
||
if (info->hash->creator == abfd->xvec)
|
||
{
|
||
/* We need to build a .loader section, so we do it here. This
|
||
won't work if we're producing an XCOFF output file with no
|
||
XCOFF input files. FIXME. */
|
||
if (xcoff_hash_table (info)->loader_section == NULL)
|
||
{
|
||
asection *lsec;
|
||
|
||
lsec = bfd_make_section_anyway (abfd, ".loader");
|
||
if (lsec == NULL)
|
||
goto error_return;
|
||
xcoff_hash_table (info)->loader_section = lsec;
|
||
lsec->flags |= SEC_HAS_CONTENTS | SEC_IN_MEMORY;
|
||
}
|
||
/* Likewise for the linkage section. */
|
||
if (xcoff_hash_table (info)->linkage_section == NULL)
|
||
{
|
||
asection *lsec;
|
||
|
||
lsec = bfd_make_section_anyway (abfd, ".gl");
|
||
if (lsec == NULL)
|
||
goto error_return;
|
||
xcoff_hash_table (info)->linkage_section = lsec;
|
||
lsec->flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
|
||
| SEC_IN_MEMORY);
|
||
lsec->alignment_power = 2;
|
||
}
|
||
/* Likewise for the TOC section. */
|
||
if (xcoff_hash_table (info)->toc_section == NULL)
|
||
{
|
||
asection *tsec;
|
||
|
||
tsec = bfd_make_section_anyway (abfd, ".tc");
|
||
if (tsec == NULL)
|
||
goto error_return;
|
||
xcoff_hash_table (info)->toc_section = tsec;
|
||
tsec->flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
|
||
| SEC_IN_MEMORY);
|
||
tsec->alignment_power = 2;
|
||
}
|
||
/* Likewise for the descriptor section. */
|
||
if (xcoff_hash_table (info)->descriptor_section == NULL)
|
||
{
|
||
asection *dsec;
|
||
|
||
dsec = bfd_make_section_anyway (abfd, ".ds");
|
||
if (dsec == NULL)
|
||
goto error_return;
|
||
xcoff_hash_table (info)->descriptor_section = dsec;
|
||
dsec->flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
|
||
| SEC_IN_MEMORY);
|
||
dsec->alignment_power = 2;
|
||
}
|
||
/* Likewise for the .debug section. */
|
||
if (xcoff_hash_table (info)->debug_section == NULL)
|
||
{
|
||
asection *dsec;
|
||
|
||
dsec = bfd_make_section_anyway (abfd, ".debug");
|
||
if (dsec == NULL)
|
||
goto error_return;
|
||
xcoff_hash_table (info)->debug_section = dsec;
|
||
dsec->flags |= SEC_HAS_CONTENTS | SEC_IN_MEMORY;
|
||
}
|
||
}
|
||
|
||
if ((abfd->flags & DYNAMIC) != 0
|
||
&& ! info->static_link)
|
||
return true;
|
||
|
||
n_tmask = coff_data (abfd)->local_n_tmask;
|
||
n_btshft = coff_data (abfd)->local_n_btshft;
|
||
|
||
/* Define macros so that ISFCN, et. al., macros work correctly. */
|
||
#define N_TMASK n_tmask
|
||
#define N_BTSHFT n_btshft
|
||
|
||
if (info->keep_memory)
|
||
default_copy = false;
|
||
else
|
||
default_copy = true;
|
||
|
||
symcount = obj_raw_syment_count (abfd);
|
||
|
||
/* We keep a list of the linker hash table entries that correspond
|
||
to each external symbol. */
|
||
sym_hash = ((struct xcoff_link_hash_entry **)
|
||
bfd_alloc (abfd,
|
||
(symcount
|
||
* sizeof (struct xcoff_link_hash_entry *))));
|
||
if (sym_hash == NULL && symcount != 0)
|
||
goto error_return;
|
||
coff_data (abfd)->sym_hashes = (struct coff_link_hash_entry **) sym_hash;
|
||
memset (sym_hash, 0,
|
||
(size_t) symcount * sizeof (struct xcoff_link_hash_entry *));
|
||
|
||
/* Because of the weird stuff we are doing with XCOFF csects, we can
|
||
not easily determine which section a symbol is in, so we store
|
||
the information in the tdata for the input file. */
|
||
csect_cache = ((asection **)
|
||
bfd_alloc (abfd, symcount * sizeof (asection *)));
|
||
if (csect_cache == NULL && symcount != 0)
|
||
goto error_return;
|
||
xcoff_data (abfd)->csects = csect_cache;
|
||
memset (csect_cache, 0, (size_t) symcount * sizeof (asection *));
|
||
|
||
/* While splitting sections into csects, we need to assign the
|
||
relocs correctly. The relocs and the csects must both be in
|
||
order by VMA within a given section, so we handle this by
|
||
scanning along the relocs as we process the csects. We index
|
||
into reloc_info using the section target_index. */
|
||
reloc_info = ((struct reloc_info_struct *)
|
||
bfd_malloc ((abfd->section_count + 1)
|
||
* sizeof (struct reloc_info_struct)));
|
||
if (reloc_info == NULL)
|
||
goto error_return;
|
||
memset ((PTR) reloc_info, 0,
|
||
(abfd->section_count + 1) * sizeof (struct reloc_info_struct));
|
||
|
||
/* Read in the relocs and line numbers for each section. */
|
||
linesz = bfd_coff_linesz (abfd);
|
||
last_real = NULL;
|
||
for (o = abfd->sections; o != NULL; o = o->next)
|
||
{
|
||
last_real = o;
|
||
if ((o->flags & SEC_RELOC) != 0)
|
||
{
|
||
reloc_info[o->target_index].relocs =
|
||
xcoff_read_internal_relocs (abfd, o, true, (bfd_byte *) NULL,
|
||
false, (struct internal_reloc *) NULL);
|
||
reloc_info[o->target_index].csects =
|
||
(asection **) bfd_malloc (o->reloc_count * sizeof (asection *));
|
||
if (reloc_info[o->target_index].csects == NULL)
|
||
goto error_return;
|
||
memset (reloc_info[o->target_index].csects, 0,
|
||
o->reloc_count * sizeof (asection *));
|
||
}
|
||
|
||
if ((info->strip == strip_none || info->strip == strip_some)
|
||
&& o->lineno_count > 0)
|
||
{
|
||
bfd_byte *linenos;
|
||
|
||
linenos = (bfd_byte *) bfd_malloc (o->lineno_count * linesz);
|
||
if (linenos == NULL)
|
||
goto error_return;
|
||
reloc_info[o->target_index].linenos = linenos;
|
||
if (bfd_seek (abfd, o->line_filepos, SEEK_SET) != 0
|
||
|| (bfd_read (linenos, linesz, o->lineno_count, abfd)
|
||
!= linesz * o->lineno_count))
|
||
goto error_return;
|
||
}
|
||
}
|
||
|
||
/* Don't let the linker relocation routines discard the symbols. */
|
||
obj_coff_keep_syms (abfd) = true;
|
||
|
||
csect = NULL;
|
||
csect_index = 0;
|
||
first_csect = NULL;
|
||
|
||
symesz = bfd_coff_symesz (abfd);
|
||
BFD_ASSERT (symesz == bfd_coff_auxesz (abfd));
|
||
esym = (bfd_byte *) obj_coff_external_syms (abfd);
|
||
esym_end = esym + symcount * symesz;
|
||
while (esym < esym_end)
|
||
{
|
||
struct internal_syment sym;
|
||
union internal_auxent aux;
|
||
const char *name;
|
||
char buf[SYMNMLEN + 1];
|
||
int smtyp;
|
||
flagword flags;
|
||
asection *section;
|
||
bfd_vma value;
|
||
struct xcoff_link_hash_entry *set_toc;
|
||
|
||
bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &sym);
|
||
|
||
/* In this pass we are only interested in symbols with csect
|
||
information. */
|
||
if (sym.n_sclass != C_EXT && sym.n_sclass != C_HIDEXT)
|
||
{
|
||
if (sym.n_sclass == C_FILE && csect != NULL)
|
||
{
|
||
xcoff_section_data (abfd, csect)->last_symndx =
|
||
((esym
|
||
- (bfd_byte *) obj_coff_external_syms (abfd))
|
||
/ symesz);
|
||
csect = NULL;
|
||
}
|
||
|
||
if (csect != NULL)
|
||
*csect_cache = csect;
|
||
else if (first_csect == NULL || sym.n_sclass == C_FILE)
|
||
*csect_cache = coff_section_from_bfd_index (abfd, sym.n_scnum);
|
||
else
|
||
*csect_cache = NULL;
|
||
esym += (sym.n_numaux + 1) * symesz;
|
||
sym_hash += sym.n_numaux + 1;
|
||
csect_cache += sym.n_numaux + 1;
|
||
continue;
|
||
}
|
||
|
||
name = _bfd_coff_internal_syment_name (abfd, &sym, buf);
|
||
if (name == NULL)
|
||
goto error_return;
|
||
|
||
/* If this symbol has line number information attached to it,
|
||
and we're not stripping it, count the number of entries and
|
||
add them to the count for this csect. In the final link pass
|
||
we are going to attach line number information by symbol,
|
||
rather than by section, in order to more easily handle
|
||
garbage collection. */
|
||
if ((info->strip == strip_none || info->strip == strip_some)
|
||
&& sym.n_numaux > 1
|
||
&& csect != NULL
|
||
&& ISFCN (sym.n_type))
|
||
{
|
||
union internal_auxent auxlin;
|
||
|
||
bfd_coff_swap_aux_in (abfd, (PTR) (esym + symesz),
|
||
sym.n_type, sym.n_sclass,
|
||
0, sym.n_numaux, (PTR) &auxlin);
|
||
if (auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr != 0)
|
||
{
|
||
asection *enclosing;
|
||
bfd_size_type linoff;
|
||
|
||
enclosing = xcoff_section_data (abfd, csect)->enclosing;
|
||
if (enclosing == NULL)
|
||
{
|
||
(*_bfd_error_handler)
|
||
("%s: `%s' has line numbers but no enclosing section",
|
||
bfd_get_filename (abfd), name);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
goto error_return;
|
||
}
|
||
linoff = (auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr
|
||
- enclosing->line_filepos);
|
||
if (linoff < enclosing->lineno_count * linesz)
|
||
{
|
||
struct internal_lineno lin;
|
||
bfd_byte *linpstart;
|
||
|
||
linpstart = (reloc_info[enclosing->target_index].linenos
|
||
+ linoff);
|
||
bfd_coff_swap_lineno_in (abfd, (PTR) linpstart, (PTR) &lin);
|
||
if (lin.l_lnno == 0
|
||
&& ((bfd_size_type) lin.l_addr.l_symndx
|
||
== ((esym
|
||
- (bfd_byte *) obj_coff_external_syms (abfd))
|
||
/ symesz)))
|
||
{
|
||
bfd_byte *linpend, *linp;
|
||
|
||
linpend = (reloc_info[enclosing->target_index].linenos
|
||
+ enclosing->lineno_count * linesz);
|
||
for (linp = linpstart + linesz;
|
||
linp < linpend;
|
||
linp += linesz)
|
||
{
|
||
bfd_coff_swap_lineno_in (abfd, (PTR) linp,
|
||
(PTR) &lin);
|
||
if (lin.l_lnno == 0)
|
||
break;
|
||
}
|
||
csect->lineno_count += (linp - linpstart) / linesz;
|
||
/* The setting of line_filepos will only be
|
||
useful if all the line number entries for a
|
||
csect are contiguous; this only matters for
|
||
error reporting. */
|
||
if (csect->line_filepos == 0)
|
||
csect->line_filepos =
|
||
auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Pick up the csect auxiliary information. */
|
||
|
||
if (sym.n_numaux == 0)
|
||
{
|
||
(*_bfd_error_handler)
|
||
("%s: class %d symbol `%s' has no aux entries",
|
||
bfd_get_filename (abfd), sym.n_sclass, name);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
goto error_return;
|
||
}
|
||
|
||
bfd_coff_swap_aux_in (abfd,
|
||
(PTR) (esym + symesz * sym.n_numaux),
|
||
sym.n_type, sym.n_sclass,
|
||
sym.n_numaux - 1, sym.n_numaux,
|
||
(PTR) &aux);
|
||
|
||
smtyp = SMTYP_SMTYP (aux.x_csect.x_smtyp);
|
||
|
||
flags = BSF_GLOBAL;
|
||
section = NULL;
|
||
value = 0;
|
||
set_toc = NULL;
|
||
|
||
switch (smtyp)
|
||
{
|
||
default:
|
||
(*_bfd_error_handler)
|
||
("%s: symbol `%s' has unrecognized csect type %d",
|
||
bfd_get_filename (abfd), name, smtyp);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
goto error_return;
|
||
|
||
case XTY_ER:
|
||
/* This is an external reference. */
|
||
if (sym.n_sclass == C_HIDEXT
|
||
|| sym.n_scnum != N_UNDEF
|
||
|| aux.x_csect.x_scnlen.l != 0)
|
||
{
|
||
(*_bfd_error_handler)
|
||
("%s: bad XTY_ER symbol `%s': class %d scnum %d scnlen %d",
|
||
bfd_get_filename (abfd), name, sym.n_sclass, sym.n_scnum,
|
||
aux.x_csect.x_scnlen.l);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
goto error_return;
|
||
}
|
||
|
||
/* An XMC_XO external reference is actually a reference to
|
||
an absolute location. */
|
||
if (aux.x_csect.x_smclas != XMC_XO)
|
||
section = bfd_und_section_ptr;
|
||
else
|
||
{
|
||
section = bfd_abs_section_ptr;
|
||
value = sym.n_value;
|
||
}
|
||
break;
|
||
|
||
case XTY_SD:
|
||
/* This is a csect definition. */
|
||
|
||
if (csect != NULL)
|
||
{
|
||
xcoff_section_data (abfd, csect)->last_symndx =
|
||
((esym
|
||
- (bfd_byte *) obj_coff_external_syms (abfd))
|
||
/ symesz);
|
||
}
|
||
|
||
csect = NULL;
|
||
csect_index = -1;
|
||
|
||
/* When we see a TOC anchor, we record the TOC value. */
|
||
if (aux.x_csect.x_smclas == XMC_TC0)
|
||
{
|
||
if (sym.n_sclass != C_HIDEXT
|
||
|| aux.x_csect.x_scnlen.l != 0)
|
||
{
|
||
(*_bfd_error_handler)
|
||
("%s: XMC_TC0 symbol `%s' is class %d scnlen %d",
|
||
bfd_get_filename (abfd), name, sym.n_sclass,
|
||
aux.x_csect.x_scnlen.l);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
goto error_return;
|
||
}
|
||
xcoff_data (abfd)->toc = sym.n_value;
|
||
}
|
||
|
||
/* We must merge TOC entries for the same symbol. We can
|
||
merge two TOC entries if they are both C_HIDEXT, they
|
||
both have the same name, they are both 4 bytes long, and
|
||
they both have a relocation table entry for an external
|
||
symbol with the same name. Unfortunately, this means
|
||
that we must look through the relocations. Ick. */
|
||
if (aux.x_csect.x_smclas == XMC_TC
|
||
&& sym.n_sclass == C_HIDEXT
|
||
&& aux.x_csect.x_scnlen.l == 4
|
||
&& info->hash->creator == abfd->xvec)
|
||
{
|
||
asection *enclosing;
|
||
struct internal_reloc *relocs;
|
||
bfd_size_type relindx;
|
||
struct internal_reloc *rel;
|
||
|
||
enclosing = coff_section_from_bfd_index (abfd, sym.n_scnum);
|
||
if (enclosing == NULL)
|
||
goto error_return;
|
||
|
||
relocs = reloc_info[enclosing->target_index].relocs;
|
||
relindx = xcoff_find_reloc (relocs, enclosing->reloc_count,
|
||
sym.n_value);
|
||
rel = relocs + relindx;
|
||
if (relindx < enclosing->reloc_count
|
||
&& rel->r_vaddr == (bfd_vma) sym.n_value
|
||
&& rel->r_size == 31
|
||
&& rel->r_type == R_POS)
|
||
{
|
||
bfd_byte *erelsym;
|
||
struct internal_syment relsym;
|
||
|
||
erelsym = ((bfd_byte *) obj_coff_external_syms (abfd)
|
||
+ rel->r_symndx * symesz);
|
||
bfd_coff_swap_sym_in (abfd, (PTR) erelsym, (PTR) &relsym);
|
||
if (relsym.n_sclass == C_EXT)
|
||
{
|
||
const char *relname;
|
||
char relbuf[SYMNMLEN + 1];
|
||
boolean copy;
|
||
struct xcoff_link_hash_entry *h;
|
||
|
||
/* At this point we know that the TOC entry is
|
||
for an externally visible symbol. */
|
||
relname = _bfd_coff_internal_syment_name (abfd, &relsym,
|
||
relbuf);
|
||
if (relname == NULL)
|
||
goto error_return;
|
||
|
||
/* We only merge TOC entries if the TC name is
|
||
the same as the symbol name. This handles
|
||
the normal case, but not common cases like
|
||
SYM.P4 which gcc generates to store SYM + 4
|
||
in the TOC. FIXME. */
|
||
if (strcmp (name, relname) == 0)
|
||
{
|
||
copy = (! info->keep_memory
|
||
|| relsym._n._n_n._n_zeroes != 0
|
||
|| relsym._n._n_n._n_offset == 0);
|
||
h = xcoff_link_hash_lookup (xcoff_hash_table (info),
|
||
relname, true, copy,
|
||
false);
|
||
if (h == NULL)
|
||
goto error_return;
|
||
|
||
/* At this point h->root.type could be
|
||
bfd_link_hash_new. That should be OK,
|
||
since we know for sure that we will come
|
||
across this symbol as we step through the
|
||
file. */
|
||
|
||
/* We store h in *sym_hash for the
|
||
convenience of the relocate_section
|
||
function. */
|
||
*sym_hash = h;
|
||
|
||
if (h->toc_section != NULL)
|
||
{
|
||
asection **rel_csects;
|
||
|
||
/* We already have a TOC entry for this
|
||
symbol, so we can just ignore this
|
||
one. */
|
||
rel_csects =
|
||
reloc_info[enclosing->target_index].csects;
|
||
rel_csects[relindx] = bfd_und_section_ptr;
|
||
break;
|
||
}
|
||
|
||
/* We are about to create a TOC entry for
|
||
this symbol. */
|
||
set_toc = h;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/* We need to create a new section. We get the name from
|
||
the csect storage mapping class, so that the linker can
|
||
accumulate similar csects together. */
|
||
{
|
||
static const char *csect_name_by_class[] =
|
||
{
|
||
".pr", ".ro", ".db", ".tc", ".ua", ".rw", ".gl", ".xo",
|
||
".sv", ".bs", ".ds", ".uc", ".ti", ".tb", NULL, ".tc0",
|
||
".td"
|
||
};
|
||
const char *csect_name;
|
||
asection *enclosing;
|
||
|
||
if ((aux.x_csect.x_smclas >=
|
||
sizeof csect_name_by_class / sizeof csect_name_by_class[0])
|
||
|| csect_name_by_class[aux.x_csect.x_smclas] == NULL)
|
||
{
|
||
(*_bfd_error_handler)
|
||
("%s: symbol `%s' has unrecognized smclas %d",
|
||
bfd_get_filename (abfd), name, aux.x_csect.x_smclas);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
goto error_return;
|
||
}
|
||
|
||
csect_name = csect_name_by_class[aux.x_csect.x_smclas];
|
||
csect = bfd_make_section_anyway (abfd, csect_name);
|
||
if (csect == NULL)
|
||
goto error_return;
|
||
enclosing = coff_section_from_bfd_index (abfd, sym.n_scnum);
|
||
if (enclosing == NULL)
|
||
goto error_return;
|
||
if (! bfd_is_abs_section (enclosing)
|
||
&& ((bfd_vma) sym.n_value < enclosing->vma
|
||
|| ((bfd_vma) sym.n_value + aux.x_csect.x_scnlen.l
|
||
> enclosing->vma + enclosing->_raw_size)))
|
||
{
|
||
(*_bfd_error_handler)
|
||
("%s: csect `%s' not in enclosing section",
|
||
bfd_get_filename (abfd), name);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
goto error_return;
|
||
}
|
||
csect->vma = sym.n_value;
|
||
csect->filepos = (enclosing->filepos
|
||
+ sym.n_value
|
||
- enclosing->vma);
|
||
csect->_raw_size = aux.x_csect.x_scnlen.l;
|
||
csect->flags |= SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS;
|
||
csect->alignment_power = SMTYP_ALIGN (aux.x_csect.x_smtyp);
|
||
|
||
/* Record the enclosing section in the tdata for this new
|
||
section. */
|
||
csect->used_by_bfd =
|
||
((struct coff_section_tdata *)
|
||
bfd_zalloc (abfd, sizeof (struct coff_section_tdata)));
|
||
if (csect->used_by_bfd == NULL)
|
||
goto error_return;
|
||
coff_section_data (abfd, csect)->tdata =
|
||
bfd_zalloc (abfd, sizeof (struct xcoff_section_tdata));
|
||
if (coff_section_data (abfd, csect)->tdata == NULL)
|
||
goto error_return;
|
||
xcoff_section_data (abfd, csect)->enclosing = enclosing;
|
||
xcoff_section_data (abfd, csect)->lineno_count =
|
||
enclosing->lineno_count;
|
||
|
||
if (enclosing->owner == abfd)
|
||
{
|
||
struct internal_reloc *relocs;
|
||
bfd_size_type relindx;
|
||
struct internal_reloc *rel;
|
||
asection **rel_csect;
|
||
|
||
relocs = reloc_info[enclosing->target_index].relocs;
|
||
relindx = xcoff_find_reloc (relocs, enclosing->reloc_count,
|
||
csect->vma);
|
||
rel = relocs + relindx;
|
||
rel_csect = (reloc_info[enclosing->target_index].csects
|
||
+ relindx);
|
||
csect->rel_filepos = (enclosing->rel_filepos
|
||
+ relindx * bfd_coff_relsz (abfd));
|
||
while (relindx < enclosing->reloc_count
|
||
&& *rel_csect == NULL
|
||
&& rel->r_vaddr < csect->vma + csect->_raw_size)
|
||
{
|
||
*rel_csect = csect;
|
||
csect->flags |= SEC_RELOC;
|
||
++csect->reloc_count;
|
||
++relindx;
|
||
++rel;
|
||
++rel_csect;
|
||
}
|
||
}
|
||
|
||
/* There are a number of other fields and section flags
|
||
which we do not bother to set. */
|
||
|
||
csect_index = ((esym
|
||
- (bfd_byte *) obj_coff_external_syms (abfd))
|
||
/ symesz);
|
||
|
||
xcoff_section_data (abfd, csect)->first_symndx = csect_index;
|
||
|
||
if (first_csect == NULL)
|
||
first_csect = csect;
|
||
|
||
/* If this symbol is C_EXT, we treat it as starting at the
|
||
beginning of the newly created section. */
|
||
if (sym.n_sclass == C_EXT)
|
||
{
|
||
section = csect;
|
||
value = 0;
|
||
}
|
||
|
||
/* If this is a TOC section for a symbol, record it. */
|
||
if (set_toc != NULL)
|
||
set_toc->toc_section = csect;
|
||
}
|
||
break;
|
||
|
||
case XTY_LD:
|
||
/* This is a label definition. The x_scnlen field is the
|
||
symbol index of the csect. I believe that this must
|
||
always follow the appropriate XTY_SD symbol, so I will
|
||
insist on it. */
|
||
{
|
||
boolean bad;
|
||
|
||
bad = false;
|
||
if (aux.x_csect.x_scnlen.l < 0
|
||
|| (aux.x_csect.x_scnlen.l
|
||
>= esym - (bfd_byte *) obj_coff_external_syms (abfd)))
|
||
bad = true;
|
||
if (! bad)
|
||
{
|
||
section = xcoff_data (abfd)->csects[aux.x_csect.x_scnlen.l];
|
||
if (section == NULL
|
||
|| (section->flags & SEC_HAS_CONTENTS) == 0)
|
||
bad = true;
|
||
}
|
||
if (bad)
|
||
{
|
||
(*_bfd_error_handler)
|
||
("%s: misplaced XTY_LD `%s'",
|
||
bfd_get_filename (abfd), name);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
goto error_return;
|
||
}
|
||
|
||
value = sym.n_value - csect->vma;
|
||
}
|
||
break;
|
||
|
||
case XTY_CM:
|
||
/* This is an unitialized csect. We could base the name on
|
||
the storage mapping class, but we don't bother. If this
|
||
csect is externally visible, it is a common symbol. */
|
||
|
||
if (csect != NULL)
|
||
{
|
||
xcoff_section_data (abfd, csect)->last_symndx =
|
||
((esym
|
||
- (bfd_byte *) obj_coff_external_syms (abfd))
|
||
/ symesz);
|
||
}
|
||
|
||
csect = bfd_make_section_anyway (abfd, ".bss");
|
||
if (csect == NULL)
|
||
goto error_return;
|
||
csect->vma = sym.n_value;
|
||
csect->_raw_size = aux.x_csect.x_scnlen.l;
|
||
csect->flags |= SEC_ALLOC;
|
||
csect->alignment_power = SMTYP_ALIGN (aux.x_csect.x_smtyp);
|
||
/* There are a number of other fields and section flags
|
||
which we do not bother to set. */
|
||
|
||
csect_index = ((esym
|
||
- (bfd_byte *) obj_coff_external_syms (abfd))
|
||
/ symesz);
|
||
|
||
csect->used_by_bfd =
|
||
((struct coff_section_tdata *)
|
||
bfd_zalloc (abfd, sizeof (struct coff_section_tdata)));
|
||
if (csect->used_by_bfd == NULL)
|
||
goto error_return;
|
||
coff_section_data (abfd, csect)->tdata =
|
||
bfd_zalloc (abfd, sizeof (struct xcoff_section_tdata));
|
||
if (coff_section_data (abfd, csect)->tdata == NULL)
|
||
goto error_return;
|
||
xcoff_section_data (abfd, csect)->first_symndx = csect_index;
|
||
|
||
if (first_csect == NULL)
|
||
first_csect = csect;
|
||
|
||
if (sym.n_sclass == C_EXT)
|
||
{
|
||
csect->flags |= SEC_IS_COMMON;
|
||
csect->_raw_size = 0;
|
||
section = csect;
|
||
value = aux.x_csect.x_scnlen.l;
|
||
}
|
||
|
||
break;
|
||
}
|
||
|
||
/* Check for magic symbol names. */
|
||
if ((smtyp == XTY_SD || smtyp == XTY_CM)
|
||
&& aux.x_csect.x_smclas != XMC_TC
|
||
&& aux.x_csect.x_smclas != XMC_TD)
|
||
{
|
||
int i;
|
||
|
||
i = -1;
|
||
if (name[0] == '_')
|
||
{
|
||
if (strcmp (name, "_text") == 0)
|
||
i = 0;
|
||
else if (strcmp (name, "_etext") == 0)
|
||
i = 1;
|
||
else if (strcmp (name, "_data") == 0)
|
||
i = 2;
|
||
else if (strcmp (name, "_edata") == 0)
|
||
i = 3;
|
||
else if (strcmp (name, "_end") == 0)
|
||
i = 4;
|
||
}
|
||
else if (name[0] == 'e' && strcmp (name, "end") == 0)
|
||
i = 5;
|
||
|
||
if (i != -1)
|
||
xcoff_hash_table (info)->special_sections[i] = csect;
|
||
}
|
||
|
||
/* Now we have enough information to add the symbol to the
|
||
linker hash table. */
|
||
|
||
if (sym.n_sclass == C_EXT)
|
||
{
|
||
boolean copy;
|
||
|
||
BFD_ASSERT (section != NULL);
|
||
|
||
/* We must copy the name into memory if we got it from the
|
||
syment itself, rather than the string table. */
|
||
copy = default_copy;
|
||
if (sym._n._n_n._n_zeroes != 0
|
||
|| sym._n._n_n._n_offset == 0)
|
||
copy = true;
|
||
|
||
/* The AIX linker appears to only detect multiple symbol
|
||
definitions when there is a reference to the symbol. If
|
||
a symbol is defined multiple times, and the only
|
||
references are from the same object file, the AIX linker
|
||
appears to permit it. It does not merge the different
|
||
definitions, but handles them independently. On the
|
||
other hand, if there is a reference, the linker reports
|
||
an error.
|
||
|
||
This matters because the AIX <net/net_globals.h> header
|
||
file actually defines an initialized array, so we have to
|
||
actually permit that to work.
|
||
|
||
We also have to handle the case of statically linking a
|
||
shared object, which will cause symbol redefinitions,
|
||
although this is an easier case to detect. */
|
||
|
||
if (info->hash->creator == abfd->xvec)
|
||
{
|
||
if (! bfd_is_und_section (section))
|
||
*sym_hash = xcoff_link_hash_lookup (xcoff_hash_table (info),
|
||
name, true, copy, false);
|
||
else
|
||
*sym_hash = ((struct xcoff_link_hash_entry *)
|
||
bfd_wrapped_link_hash_lookup (abfd, info, name,
|
||
true, copy, false));
|
||
if (*sym_hash == NULL)
|
||
goto error_return;
|
||
if (((*sym_hash)->root.type == bfd_link_hash_defined
|
||
|| (*sym_hash)->root.type == bfd_link_hash_defweak)
|
||
&& ! bfd_is_und_section (section)
|
||
&& ! bfd_is_com_section (section))
|
||
{
|
||
/* This is a second definition of a defined symbol. */
|
||
if ((abfd->flags & DYNAMIC) != 0
|
||
&& ((*sym_hash)->smclas != XMC_GL
|
||
|| aux.x_csect.x_smclas == XMC_GL
|
||
|| ((*sym_hash)->root.u.def.section->owner->flags
|
||
& DYNAMIC) == 0))
|
||
{
|
||
/* The new symbol is from a shared library, and
|
||
either the existing symbol is not global
|
||
linkage code or this symbol is global linkage
|
||
code. If the existing symbol is global
|
||
linkage code and the new symbol is not, then
|
||
we want to use the new symbol. */
|
||
section = bfd_und_section_ptr;
|
||
value = 0;
|
||
}
|
||
else if (((*sym_hash)->root.u.def.section->owner->flags
|
||
& DYNAMIC) != 0)
|
||
{
|
||
/* The existing symbol is from a shared library.
|
||
Replace it. */
|
||
(*sym_hash)->root.type = bfd_link_hash_undefined;
|
||
(*sym_hash)->root.u.undef.abfd =
|
||
(*sym_hash)->root.u.def.section->owner;
|
||
}
|
||
else if ((*sym_hash)->root.next != NULL
|
||
|| info->hash->undefs_tail == &(*sym_hash)->root)
|
||
{
|
||
/* This symbol has been referenced. In this
|
||
case, we just continue and permit the
|
||
multiple definition error. See the comment
|
||
above about the behaviour of the AIX linker. */
|
||
}
|
||
else if ((*sym_hash)->smclas == aux.x_csect.x_smclas)
|
||
{
|
||
/* The symbols are both csects of the same
|
||
class. There is at least a chance that this
|
||
is a semi-legitimate redefinition. */
|
||
section = bfd_und_section_ptr;
|
||
value = 0;
|
||
(*sym_hash)->flags |= XCOFF_MULTIPLY_DEFINED;
|
||
}
|
||
}
|
||
else if (((*sym_hash)->flags & XCOFF_MULTIPLY_DEFINED) != 0
|
||
&& ((*sym_hash)->root.type == bfd_link_hash_defined
|
||
|| (*sym_hash)->root.type == bfd_link_hash_defweak)
|
||
&& (bfd_is_und_section (section)
|
||
|| bfd_is_com_section (section)))
|
||
{
|
||
/* This is a reference to a multiply defined symbol.
|
||
Report the error now. See the comment above
|
||
about the behaviour of the AIX linker. We could
|
||
also do this with warning symbols, but I'm not
|
||
sure the XCOFF linker is wholly prepared to
|
||
handle them, and that would only be a warning,
|
||
not an error. */
|
||
if (! ((*info->callbacks->multiple_definition)
|
||
(info, (*sym_hash)->root.root.string,
|
||
(bfd *) NULL, (asection *) NULL, 0,
|
||
(*sym_hash)->root.u.def.section->owner,
|
||
(*sym_hash)->root.u.def.section,
|
||
(*sym_hash)->root.u.def.value)))
|
||
goto error_return;
|
||
/* Try not to give this error too many times. */
|
||
(*sym_hash)->flags &= ~XCOFF_MULTIPLY_DEFINED;
|
||
}
|
||
}
|
||
|
||
/* _bfd_generic_link_add_one_symbol may call the linker to
|
||
generate an error message, and the linker may try to read
|
||
the symbol table to give a good error. Right now, the
|
||
line numbers are in an inconsistent state, since they are
|
||
counted both in the real sections and in the new csects.
|
||
We need to leave the count in the real sections so that
|
||
the linker can report the line number of the error
|
||
correctly, so temporarily clobber the link to the csects
|
||
so that the linker will not try to read the line numbers
|
||
a second time from the csects. */
|
||
BFD_ASSERT (last_real->next == first_csect);
|
||
last_real->next = NULL;
|
||
if (! (_bfd_generic_link_add_one_symbol
|
||
(info, abfd, name, flags, section, value,
|
||
(const char *) NULL, copy, true,
|
||
(struct bfd_link_hash_entry **) sym_hash)))
|
||
goto error_return;
|
||
last_real->next = first_csect;
|
||
|
||
if (smtyp == XTY_CM)
|
||
{
|
||
if ((*sym_hash)->root.type != bfd_link_hash_common
|
||
|| (*sym_hash)->root.u.c.p->section != csect)
|
||
{
|
||
/* We don't need the common csect we just created. */
|
||
csect->_raw_size = 0;
|
||
}
|
||
else
|
||
{
|
||
(*sym_hash)->root.u.c.p->alignment_power
|
||
= csect->alignment_power;
|
||
}
|
||
}
|
||
|
||
if (info->hash->creator == abfd->xvec)
|
||
{
|
||
int flag;
|
||
|
||
if (smtyp == XTY_ER || smtyp == XTY_CM)
|
||
flag = XCOFF_REF_REGULAR;
|
||
else
|
||
flag = XCOFF_DEF_REGULAR;
|
||
(*sym_hash)->flags |= flag;
|
||
|
||
if ((*sym_hash)->smclas == XMC_UA
|
||
|| flag == XCOFF_DEF_REGULAR)
|
||
(*sym_hash)->smclas = aux.x_csect.x_smclas;
|
||
}
|
||
}
|
||
|
||
*csect_cache = csect;
|
||
|
||
esym += (sym.n_numaux + 1) * symesz;
|
||
sym_hash += sym.n_numaux + 1;
|
||
csect_cache += sym.n_numaux + 1;
|
||
}
|
||
|
||
BFD_ASSERT (last_real == NULL || last_real->next == first_csect);
|
||
|
||
/* Make sure that we have seen all the relocs. */
|
||
for (o = abfd->sections; o != first_csect; o = o->next)
|
||
{
|
||
/* Reset the section size and the line number count, since the
|
||
data is now attached to the csects. Don't reset the size of
|
||
the .debug section, since we need to read it below in
|
||
bfd_xcoff_size_dynamic_sections. */
|
||
if (strcmp (bfd_get_section_name (abfd, o), ".debug") != 0)
|
||
o->_raw_size = 0;
|
||
o->lineno_count = 0;
|
||
|
||
if ((o->flags & SEC_RELOC) != 0)
|
||
{
|
||
bfd_size_type i;
|
||
struct internal_reloc *rel;
|
||
asection **rel_csect;
|
||
|
||
rel = reloc_info[o->target_index].relocs;
|
||
rel_csect = reloc_info[o->target_index].csects;
|
||
for (i = 0; i < o->reloc_count; i++, rel++, rel_csect++)
|
||
{
|
||
if (*rel_csect == NULL)
|
||
{
|
||
(*_bfd_error_handler)
|
||
("%s: reloc %s:%d not in csect",
|
||
bfd_get_filename (abfd), o->name, i);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
goto error_return;
|
||
}
|
||
|
||
/* We identify all symbols which are called, so that we
|
||
can create glue code for calls to functions imported
|
||
from dynamic objects. */
|
||
if (info->hash->creator == abfd->xvec
|
||
&& *rel_csect != bfd_und_section_ptr
|
||
&& (rel->r_type == R_BR
|
||
|| rel->r_type == R_RBR)
|
||
&& obj_xcoff_sym_hashes (abfd)[rel->r_symndx] != NULL)
|
||
{
|
||
struct xcoff_link_hash_entry *h;
|
||
|
||
h = obj_xcoff_sym_hashes (abfd)[rel->r_symndx];
|
||
h->flags |= XCOFF_CALLED;
|
||
/* If the symbol name starts with a period, it is
|
||
the code of a function. If the symbol is
|
||
currently undefined, then add an undefined symbol
|
||
for the function descriptor. This should do no
|
||
harm, because any regular object that defines the
|
||
function should also define the function
|
||
descriptor. It helps, because it means that we
|
||
will identify the function descriptor with a
|
||
dynamic object if a dynamic object defines it. */
|
||
if (h->root.root.string[0] == '.'
|
||
&& h->descriptor == NULL)
|
||
{
|
||
struct xcoff_link_hash_entry *hds;
|
||
|
||
hds = xcoff_link_hash_lookup (xcoff_hash_table (info),
|
||
h->root.root.string + 1,
|
||
true, false, true);
|
||
if (hds == NULL)
|
||
goto error_return;
|
||
if (hds->root.type == bfd_link_hash_new)
|
||
{
|
||
if (! (_bfd_generic_link_add_one_symbol
|
||
(info, abfd, hds->root.root.string,
|
||
(flagword) 0, bfd_und_section_ptr,
|
||
(bfd_vma) 0, (const char *) NULL, false,
|
||
true,
|
||
(struct bfd_link_hash_entry **) &hds)))
|
||
goto error_return;
|
||
}
|
||
hds->flags |= XCOFF_DESCRIPTOR;
|
||
BFD_ASSERT ((hds->flags & XCOFF_CALLED) == 0
|
||
&& (h->flags & XCOFF_DESCRIPTOR) == 0);
|
||
hds->descriptor = h;
|
||
h->descriptor = hds;
|
||
}
|
||
}
|
||
}
|
||
|
||
free (reloc_info[o->target_index].csects);
|
||
reloc_info[o->target_index].csects = NULL;
|
||
|
||
/* Reset SEC_RELOC and the reloc_count, since the reloc
|
||
information is now attached to the csects. */
|
||
o->flags &=~ SEC_RELOC;
|
||
o->reloc_count = 0;
|
||
|
||
/* If we are not keeping memory, free the reloc information. */
|
||
if (! info->keep_memory
|
||
&& coff_section_data (abfd, o) != NULL
|
||
&& coff_section_data (abfd, o)->relocs != NULL
|
||
&& ! coff_section_data (abfd, o)->keep_relocs)
|
||
{
|
||
free (coff_section_data (abfd, o)->relocs);
|
||
coff_section_data (abfd, o)->relocs = NULL;
|
||
}
|
||
}
|
||
|
||
/* Free up the line numbers. FIXME: We could cache these
|
||
somewhere for the final link, to avoid reading them again. */
|
||
if (reloc_info[o->target_index].linenos != NULL)
|
||
{
|
||
free (reloc_info[o->target_index].linenos);
|
||
reloc_info[o->target_index].linenos = NULL;
|
||
}
|
||
}
|
||
|
||
free (reloc_info);
|
||
|
||
obj_coff_keep_syms (abfd) = keep_syms;
|
||
|
||
return true;
|
||
|
||
error_return:
|
||
if (reloc_info != NULL)
|
||
{
|
||
for (o = abfd->sections; o != NULL; o = o->next)
|
||
{
|
||
if (reloc_info[o->target_index].csects != NULL)
|
||
free (reloc_info[o->target_index].csects);
|
||
if (reloc_info[o->target_index].linenos != NULL)
|
||
free (reloc_info[o->target_index].linenos);
|
||
}
|
||
free (reloc_info);
|
||
}
|
||
obj_coff_keep_syms (abfd) = keep_syms;
|
||
return false;
|
||
}
|
||
|
||
#undef N_TMASK
|
||
#undef N_BTSHFT
|
||
|
||
/* This function is used to add symbols from a dynamic object to the
|
||
global symbol table. */
|
||
|
||
static boolean
|
||
xcoff_link_add_dynamic_symbols (abfd, info)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
{
|
||
asection *lsec;
|
||
bfd_byte *buf;
|
||
struct internal_ldhdr ldhdr;
|
||
const char *strings;
|
||
struct external_ldsym *elsym, *elsymend;
|
||
struct xcoff_import_file *n;
|
||
const char *bname;
|
||
const char *mname;
|
||
const char *s;
|
||
unsigned int c;
|
||
struct xcoff_import_file **pp;
|
||
|
||
/* We can only handle a dynamic object if we are generating an XCOFF
|
||
output file. */
|
||
if (info->hash->creator != abfd->xvec)
|
||
{
|
||
(*_bfd_error_handler)
|
||
("%s: XCOFF shared object when not producing XCOFF output",
|
||
bfd_get_filename (abfd));
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
return false;
|
||
}
|
||
|
||
/* The symbols we use from a dynamic object are not the symbols in
|
||
the normal symbol table, but, rather, the symbols in the export
|
||
table. If there is a global symbol in a dynamic object which is
|
||
not in the export table, the loader will not be able to find it,
|
||
so we don't want to find it either. Also, on AIX 4.1.3, shr.o in
|
||
libc.a has symbols in the export table which are not in the
|
||
symbol table. */
|
||
|
||
/* Read in the .loader section. FIXME: We should really use the
|
||
o_snloader field in the a.out header, rather than grabbing the
|
||
section by name. */
|
||
lsec = bfd_get_section_by_name (abfd, ".loader");
|
||
if (lsec == NULL)
|
||
{
|
||
(*_bfd_error_handler)
|
||
("%s: dynamic object with no .loader section",
|
||
bfd_get_filename (abfd));
|
||
bfd_set_error (bfd_error_no_symbols);
|
||
return false;
|
||
}
|
||
|
||
if (! xcoff_get_section_contents (abfd, lsec))
|
||
return false;
|
||
buf = coff_section_data (abfd, lsec)->contents;
|
||
|
||
/* Remove the sections from this object, so that they do not get
|
||
included in the link. */
|
||
abfd->sections = NULL;
|
||
|
||
xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) buf, &ldhdr);
|
||
|
||
strings = (char *) buf + ldhdr.l_stoff;
|
||
|
||
elsym = (struct external_ldsym *) (buf + LDHDRSZ);
|
||
elsymend = elsym + ldhdr.l_nsyms;
|
||
BFD_ASSERT (sizeof (struct external_ldsym) == LDSYMSZ);
|
||
for (; elsym < elsymend; elsym++)
|
||
{
|
||
struct internal_ldsym ldsym;
|
||
char nambuf[SYMNMLEN + 1];
|
||
const char *name;
|
||
struct xcoff_link_hash_entry *h;
|
||
|
||
xcoff_swap_ldsym_in (abfd, elsym, &ldsym);
|
||
|
||
/* We are only interested in exported symbols. */
|
||
if ((ldsym.l_smtype & L_EXPORT) == 0)
|
||
continue;
|
||
|
||
if (ldsym._l._l_l._l_zeroes == 0)
|
||
name = strings + ldsym._l._l_l._l_offset;
|
||
else
|
||
{
|
||
memcpy (nambuf, ldsym._l._l_name, SYMNMLEN);
|
||
nambuf[SYMNMLEN] = '\0';
|
||
name = nambuf;
|
||
}
|
||
|
||
/* Normally we could not call xcoff_link_hash_lookup in an add
|
||
symbols routine, since we might not be using an XCOFF hash
|
||
table. However, we verified above that we are using an XCOFF
|
||
hash table. */
|
||
|
||
h = xcoff_link_hash_lookup (xcoff_hash_table (info), name, true,
|
||
true, true);
|
||
if (h == NULL)
|
||
return false;
|
||
|
||
h->flags |= XCOFF_DEF_DYNAMIC;
|
||
|
||
/* If the symbol is undefined, and the BFD it was found in is
|
||
not a dynamic object, change the BFD to this dynamic object,
|
||
so that we can get the correct import file ID. */
|
||
if ((h->root.type == bfd_link_hash_undefined
|
||
|| h->root.type == bfd_link_hash_undefweak)
|
||
&& (h->root.u.undef.abfd == NULL
|
||
|| (h->root.u.undef.abfd->flags & DYNAMIC) == 0))
|
||
h->root.u.undef.abfd = abfd;
|
||
|
||
if (h->root.type == bfd_link_hash_new)
|
||
{
|
||
h->root.type = bfd_link_hash_undefined;
|
||
h->root.u.undef.abfd = abfd;
|
||
/* We do not want to add this to the undefined symbol list. */
|
||
}
|
||
|
||
if (h->smclas == XMC_UA
|
||
|| h->root.type == bfd_link_hash_undefined
|
||
|| h->root.type == bfd_link_hash_undefweak)
|
||
h->smclas = ldsym.l_smclas;
|
||
|
||
/* Unless this is an XMC_XO symbol, we don't bother to actually
|
||
define it, since we don't have a section to put it in anyhow.
|
||
Instead, the relocation routines handle the DEF_DYNAMIC flag
|
||
correctly. */
|
||
|
||
if (h->smclas == XMC_XO
|
||
&& (h->root.type == bfd_link_hash_undefined
|
||
|| h->root.type == bfd_link_hash_undefweak))
|
||
{
|
||
/* This symbol has an absolute value. */
|
||
h->root.type = bfd_link_hash_defined;
|
||
h->root.u.def.section = bfd_abs_section_ptr;
|
||
h->root.u.def.value = ldsym.l_value;
|
||
}
|
||
|
||
/* If this symbol defines a function descriptor, then it
|
||
implicitly defines the function code as well. */
|
||
if (h->smclas == XMC_DS
|
||
|| (h->smclas == XMC_XO && name[0] != '.'))
|
||
h->flags |= XCOFF_DESCRIPTOR;
|
||
if ((h->flags & XCOFF_DESCRIPTOR) != 0)
|
||
{
|
||
struct xcoff_link_hash_entry *hds;
|
||
|
||
hds = h->descriptor;
|
||
if (hds == NULL)
|
||
{
|
||
char *dsnm;
|
||
|
||
dsnm = bfd_malloc (strlen (name) + 2);
|
||
if (dsnm == NULL)
|
||
return false;
|
||
dsnm[0] = '.';
|
||
strcpy (dsnm + 1, name);
|
||
hds = xcoff_link_hash_lookup (xcoff_hash_table (info), dsnm,
|
||
true, true, true);
|
||
free (dsnm);
|
||
if (hds == NULL)
|
||
return false;
|
||
|
||
if (hds->root.type == bfd_link_hash_new)
|
||
{
|
||
hds->root.type = bfd_link_hash_undefined;
|
||
hds->root.u.undef.abfd = abfd;
|
||
/* We do not want to add this to the undefined
|
||
symbol list. */
|
||
}
|
||
|
||
hds->descriptor = h;
|
||
h->descriptor = hds;
|
||
}
|
||
|
||
hds->flags |= XCOFF_DEF_DYNAMIC;
|
||
if (hds->smclas == XMC_UA)
|
||
hds->smclas = XMC_PR;
|
||
|
||
/* An absolute symbol appears to actually define code, not a
|
||
function descriptor. This is how some math functions are
|
||
implemented on AIX 4.1. */
|
||
if (h->smclas == XMC_XO
|
||
&& (hds->root.type == bfd_link_hash_undefined
|
||
|| hds->root.type == bfd_link_hash_undefweak))
|
||
{
|
||
hds->smclas = XMC_XO;
|
||
hds->root.type = bfd_link_hash_defined;
|
||
hds->root.u.def.section = bfd_abs_section_ptr;
|
||
hds->root.u.def.value = ldsym.l_value;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (buf != NULL && ! coff_section_data (abfd, lsec)->keep_contents)
|
||
{
|
||
free (coff_section_data (abfd, lsec)->contents);
|
||
coff_section_data (abfd, lsec)->contents = NULL;
|
||
}
|
||
|
||
/* Record this file in the import files. */
|
||
|
||
n = ((struct xcoff_import_file *)
|
||
bfd_alloc (abfd, sizeof (struct xcoff_import_file)));
|
||
if (n == NULL)
|
||
return false;
|
||
n->next = NULL;
|
||
|
||
/* For some reason, the path entry in the import file list for a
|
||
shared object appears to always be empty. The file name is the
|
||
base name. */
|
||
n->path = "";
|
||
if (abfd->my_archive == NULL)
|
||
{
|
||
bname = bfd_get_filename (abfd);
|
||
mname = "";
|
||
}
|
||
else
|
||
{
|
||
bname = bfd_get_filename (abfd->my_archive);
|
||
mname = bfd_get_filename (abfd);
|
||
}
|
||
s = strrchr (bname, '/');
|
||
if (s != NULL)
|
||
bname = s + 1;
|
||
n->file = bname;
|
||
n->member = mname;
|
||
|
||
/* We start c at 1 because the first import file number is reserved
|
||
for LIBPATH. */
|
||
for (pp = &xcoff_hash_table (info)->imports, c = 1;
|
||
*pp != NULL;
|
||
pp = &(*pp)->next, ++c)
|
||
;
|
||
*pp = n;
|
||
|
||
xcoff_data (abfd)->import_file_id = c;
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Routines that are called after all the input files have been
|
||
handled, but before the sections are laid out in memory. */
|
||
|
||
/* Mark a symbol as not being garbage, including the section in which
|
||
it is defined. */
|
||
|
||
static INLINE boolean
|
||
xcoff_mark_symbol (info, h)
|
||
struct bfd_link_info *info;
|
||
struct xcoff_link_hash_entry *h;
|
||
{
|
||
if ((h->flags & XCOFF_MARK) != 0)
|
||
return true;
|
||
|
||
h->flags |= XCOFF_MARK;
|
||
if (h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
{
|
||
asection *hsec;
|
||
|
||
hsec = h->root.u.def.section;
|
||
if ((hsec->flags & SEC_MARK) == 0)
|
||
{
|
||
if (! xcoff_mark (info, hsec))
|
||
return false;
|
||
}
|
||
}
|
||
|
||
if (h->toc_section != NULL
|
||
&& (h->toc_section->flags & SEC_MARK) == 0)
|
||
{
|
||
if (! xcoff_mark (info, h->toc_section))
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* The mark phase of garbage collection. For a given section, mark
|
||
it, and all the sections which define symbols to which it refers.
|
||
Because this function needs to look at the relocs, we also count
|
||
the number of relocs which need to be copied into the .loader
|
||
section. */
|
||
|
||
static boolean
|
||
xcoff_mark (info, sec)
|
||
struct bfd_link_info *info;
|
||
asection *sec;
|
||
{
|
||
if ((sec->flags & SEC_MARK) != 0)
|
||
return true;
|
||
|
||
sec->flags |= SEC_MARK;
|
||
|
||
if (sec->owner->xvec == info->hash->creator
|
||
&& coff_section_data (sec->owner, sec) != NULL
|
||
&& xcoff_section_data (sec->owner, sec) != NULL)
|
||
{
|
||
register struct xcoff_link_hash_entry **hp, **hpend;
|
||
struct internal_reloc *rel, *relend;
|
||
|
||
/* Mark all the symbols in this section. */
|
||
|
||
hp = (obj_xcoff_sym_hashes (sec->owner)
|
||
+ xcoff_section_data (sec->owner, sec)->first_symndx);
|
||
hpend = (obj_xcoff_sym_hashes (sec->owner)
|
||
+ xcoff_section_data (sec->owner, sec)->last_symndx);
|
||
for (; hp < hpend; hp++)
|
||
{
|
||
register struct xcoff_link_hash_entry *h;
|
||
|
||
h = *hp;
|
||
if (h != NULL
|
||
&& (h->flags & XCOFF_MARK) == 0)
|
||
{
|
||
if (! xcoff_mark_symbol (info, h))
|
||
return false;
|
||
}
|
||
}
|
||
|
||
/* Look through the section relocs. */
|
||
|
||
if ((sec->flags & SEC_RELOC) != 0
|
||
&& sec->reloc_count > 0)
|
||
{
|
||
rel = xcoff_read_internal_relocs (sec->owner, sec, true,
|
||
(bfd_byte *) NULL, false,
|
||
(struct internal_reloc *) NULL);
|
||
if (rel == NULL)
|
||
return false;
|
||
relend = rel + sec->reloc_count;
|
||
for (; rel < relend; rel++)
|
||
{
|
||
asection *rsec;
|
||
struct xcoff_link_hash_entry *h;
|
||
|
||
if ((unsigned int) rel->r_symndx
|
||
> obj_raw_syment_count (sec->owner))
|
||
continue;
|
||
|
||
h = obj_xcoff_sym_hashes (sec->owner)[rel->r_symndx];
|
||
if (h != NULL
|
||
&& (h->flags & XCOFF_MARK) == 0)
|
||
{
|
||
if (! xcoff_mark_symbol (info, h))
|
||
return false;
|
||
}
|
||
|
||
rsec = xcoff_data (sec->owner)->csects[rel->r_symndx];
|
||
if (rsec != NULL
|
||
&& (rsec->flags & SEC_MARK) == 0)
|
||
{
|
||
if (! xcoff_mark (info, rsec))
|
||
return false;
|
||
}
|
||
|
||
/* See if this reloc needs to be copied into the .loader
|
||
section. */
|
||
switch (rel->r_type)
|
||
{
|
||
default:
|
||
if (h == NULL
|
||
|| h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak
|
||
|| h->root.type == bfd_link_hash_common
|
||
|| ((h->flags & XCOFF_CALLED) != 0
|
||
&& (h->root.type == bfd_link_hash_undefined
|
||
|| h->root.type == bfd_link_hash_undefweak)
|
||
&& h->root.root.string[0] == '.'
|
||
&& h->descriptor != NULL
|
||
&& ((h->descriptor->flags & XCOFF_DEF_DYNAMIC) != 0
|
||
|| ((h->descriptor->flags & XCOFF_IMPORT) != 0
|
||
&& (h->descriptor->flags
|
||
& XCOFF_DEF_REGULAR) == 0))))
|
||
break;
|
||
/* Fall through. */
|
||
case R_POS:
|
||
case R_NEG:
|
||
case R_RL:
|
||
case R_RLA:
|
||
++xcoff_hash_table (info)->ldrel_count;
|
||
if (h != NULL)
|
||
h->flags |= XCOFF_LDREL;
|
||
break;
|
||
case R_TOC:
|
||
case R_GL:
|
||
case R_TCL:
|
||
case R_TRL:
|
||
case R_TRLA:
|
||
/* We should never need a .loader reloc for a TOC
|
||
relative reloc. */
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (! info->keep_memory
|
||
&& coff_section_data (sec->owner, sec) != NULL
|
||
&& coff_section_data (sec->owner, sec)->relocs != NULL
|
||
&& ! coff_section_data (sec->owner, sec)->keep_relocs)
|
||
{
|
||
free (coff_section_data (sec->owner, sec)->relocs);
|
||
coff_section_data (sec->owner, sec)->relocs = NULL;
|
||
}
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* The sweep phase of garbage collection. Remove all garbage
|
||
sections. */
|
||
|
||
static void
|
||
xcoff_sweep (info)
|
||
struct bfd_link_info *info;
|
||
{
|
||
bfd *sub;
|
||
|
||
for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
|
||
{
|
||
asection *o;
|
||
|
||
for (o = sub->sections; o != NULL; o = o->next)
|
||
{
|
||
if ((o->flags & SEC_MARK) == 0)
|
||
{
|
||
/* Keep all sections from non-XCOFF input files. Keep
|
||
special sections. Keep .debug sections for the
|
||
moment. */
|
||
if (sub->xvec != info->hash->creator
|
||
|| o == xcoff_hash_table (info)->debug_section
|
||
|| o == xcoff_hash_table (info)->loader_section
|
||
|| o == xcoff_hash_table (info)->linkage_section
|
||
|| o == xcoff_hash_table (info)->toc_section
|
||
|| o == xcoff_hash_table (info)->descriptor_section
|
||
|| strcmp (o->name, ".debug") == 0)
|
||
o->flags |= SEC_MARK;
|
||
else
|
||
{
|
||
o->_raw_size = 0;
|
||
o->reloc_count = 0;
|
||
o->lineno_count = 0;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Record the number of elements in a set. This is used to output the
|
||
correct csect length. */
|
||
|
||
boolean
|
||
bfd_xcoff_link_record_set (output_bfd, info, harg, size)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
struct bfd_link_hash_entry *harg;
|
||
bfd_size_type size;
|
||
{
|
||
struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg;
|
||
struct xcoff_link_size_list *n;
|
||
|
||
if (! XCOFF_XVECP (output_bfd->xvec))
|
||
return true;
|
||
|
||
/* This will hardly ever be called. I don't want to burn four bytes
|
||
per global symbol, so instead the size is kept on a linked list
|
||
attached to the hash table. */
|
||
|
||
n = ((struct xcoff_link_size_list *)
|
||
bfd_alloc (output_bfd, sizeof (struct xcoff_link_size_list)));
|
||
if (n == NULL)
|
||
return false;
|
||
n->next = xcoff_hash_table (info)->size_list;
|
||
n->h = h;
|
||
n->size = size;
|
||
xcoff_hash_table (info)->size_list = n;
|
||
|
||
h->flags |= XCOFF_HAS_SIZE;
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Import a symbol. */
|
||
|
||
boolean
|
||
bfd_xcoff_import_symbol (output_bfd, info, harg, val, imppath, impfile,
|
||
impmember)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
struct bfd_link_hash_entry *harg;
|
||
bfd_vma val;
|
||
const char *imppath;
|
||
const char *impfile;
|
||
const char *impmember;
|
||
{
|
||
struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg;
|
||
|
||
if (! XCOFF_XVECP (output_bfd->xvec))
|
||
return true;
|
||
|
||
h->flags |= XCOFF_IMPORT;
|
||
|
||
if (val != (bfd_vma) -1)
|
||
{
|
||
if (h->root.type == bfd_link_hash_defined
|
||
&& (! bfd_is_abs_section (h->root.u.def.section)
|
||
|| h->root.u.def.value != val))
|
||
{
|
||
if (! ((*info->callbacks->multiple_definition)
|
||
(info, h->root.root.string, h->root.u.def.section->owner,
|
||
h->root.u.def.section, h->root.u.def.value,
|
||
output_bfd, bfd_abs_section_ptr, val)))
|
||
return false;
|
||
}
|
||
|
||
h->root.type = bfd_link_hash_defined;
|
||
h->root.u.def.section = bfd_abs_section_ptr;
|
||
h->root.u.def.value = val;
|
||
}
|
||
|
||
/* We overload the ldindx field to hold the l_ifile value for this
|
||
symbol. */
|
||
BFD_ASSERT (h->ldsym == NULL);
|
||
BFD_ASSERT ((h->flags & XCOFF_BUILT_LDSYM) == 0);
|
||
if (imppath == NULL)
|
||
h->ldindx = -1;
|
||
else
|
||
{
|
||
unsigned int c;
|
||
struct xcoff_import_file **pp;
|
||
|
||
/* We start c at 1 because the first entry in the import list is
|
||
reserved for the library search path. */
|
||
for (pp = &xcoff_hash_table (info)->imports, c = 1;
|
||
*pp != NULL;
|
||
pp = &(*pp)->next, ++c)
|
||
{
|
||
if (strcmp ((*pp)->path, imppath) == 0
|
||
&& strcmp ((*pp)->file, impfile) == 0
|
||
&& strcmp ((*pp)->member, impmember) == 0)
|
||
break;
|
||
}
|
||
|
||
if (*pp == NULL)
|
||
{
|
||
struct xcoff_import_file *n;
|
||
|
||
n = ((struct xcoff_import_file *)
|
||
bfd_alloc (output_bfd, sizeof (struct xcoff_import_file)));
|
||
if (n == NULL)
|
||
return false;
|
||
n->next = NULL;
|
||
n->path = imppath;
|
||
n->file = impfile;
|
||
n->member = impmember;
|
||
*pp = n;
|
||
}
|
||
|
||
h->ldindx = c;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Export a symbol. */
|
||
|
||
boolean
|
||
bfd_xcoff_export_symbol (output_bfd, info, harg, syscall)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
struct bfd_link_hash_entry *harg;
|
||
boolean syscall;
|
||
{
|
||
struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg;
|
||
|
||
if (! XCOFF_XVECP (output_bfd->xvec))
|
||
return true;
|
||
|
||
h->flags |= XCOFF_EXPORT;
|
||
|
||
/* FIXME: I'm not at all sure what syscall is supposed to mean, so
|
||
I'm just going to ignore it until somebody explains it. */
|
||
|
||
/* See if this is a function descriptor. It may be one even though
|
||
it is not so marked. */
|
||
if ((h->flags & XCOFF_DESCRIPTOR) == 0
|
||
&& h->root.root.string[0] != '.')
|
||
{
|
||
char *fnname;
|
||
struct xcoff_link_hash_entry *hfn;
|
||
|
||
fnname = (char *) bfd_malloc (strlen (h->root.root.string) + 2);
|
||
if (fnname == NULL)
|
||
return false;
|
||
fnname[0] = '.';
|
||
strcpy (fnname + 1, h->root.root.string);
|
||
hfn = xcoff_link_hash_lookup (xcoff_hash_table (info),
|
||
fnname, false, false, true);
|
||
free (fnname);
|
||
if (hfn != NULL
|
||
&& hfn->smclas == XMC_PR
|
||
&& (hfn->root.type == bfd_link_hash_defined
|
||
|| hfn->root.type == bfd_link_hash_defweak))
|
||
{
|
||
h->flags |= XCOFF_DESCRIPTOR;
|
||
h->descriptor = hfn;
|
||
hfn->descriptor = h;
|
||
}
|
||
}
|
||
|
||
/* Make sure we don't garbage collect this symbol. */
|
||
if (! xcoff_mark_symbol (info, h))
|
||
return false;
|
||
|
||
/* If this is a function descriptor, make sure we don't garbage
|
||
collect the associated function code. We normally don't have to
|
||
worry about this, because the descriptor will be attached to a
|
||
section with relocs, but if we are creating the descriptor
|
||
ourselves those relocs will not be visible to the mark code. */
|
||
if ((h->flags & XCOFF_DESCRIPTOR) != 0)
|
||
{
|
||
if (! xcoff_mark_symbol (info, h->descriptor))
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Count a reloc against a symbol. This is called for relocs
|
||
generated by the linker script, typically for global constructors
|
||
and destructors. */
|
||
|
||
boolean
|
||
bfd_xcoff_link_count_reloc (output_bfd, info, name)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
const char *name;
|
||
{
|
||
struct xcoff_link_hash_entry *h;
|
||
|
||
if (! XCOFF_XVECP (output_bfd->xvec))
|
||
return true;
|
||
|
||
h = ((struct xcoff_link_hash_entry *)
|
||
bfd_wrapped_link_hash_lookup (output_bfd, info, name, false, false,
|
||
false));
|
||
if (h == NULL)
|
||
{
|
||
(*_bfd_error_handler) ("%s: no such symbol", name);
|
||
bfd_set_error (bfd_error_no_symbols);
|
||
return false;
|
||
}
|
||
|
||
h->flags |= XCOFF_REF_REGULAR | XCOFF_LDREL;
|
||
++xcoff_hash_table (info)->ldrel_count;
|
||
|
||
/* Mark the symbol to avoid garbage collection. */
|
||
if (! xcoff_mark_symbol (info, h))
|
||
return false;
|
||
|
||
return true;
|
||
}
|
||
|
||
/* This function is called for each symbol to which the linker script
|
||
assigns a value. */
|
||
|
||
boolean
|
||
bfd_xcoff_record_link_assignment (output_bfd, info, name)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
const char *name;
|
||
{
|
||
struct xcoff_link_hash_entry *h;
|
||
|
||
if (! XCOFF_XVECP (output_bfd->xvec))
|
||
return true;
|
||
|
||
h = xcoff_link_hash_lookup (xcoff_hash_table (info), name, true, true,
|
||
false);
|
||
if (h == NULL)
|
||
return false;
|
||
|
||
h->flags |= XCOFF_DEF_REGULAR;
|
||
|
||
return true;
|
||
}
|
||
|
||
/* This structure is used to pass information through
|
||
xcoff_link_hash_traverse. */
|
||
|
||
struct xcoff_loader_info
|
||
{
|
||
/* Set if a problem occurred. */
|
||
boolean failed;
|
||
/* Output BFD. */
|
||
bfd *output_bfd;
|
||
/* Link information structure. */
|
||
struct bfd_link_info *info;
|
||
/* Whether all defined symbols should be exported. */
|
||
boolean export_defineds;
|
||
/* Number of ldsym structures. */
|
||
size_t ldsym_count;
|
||
/* Size of string table. */
|
||
size_t string_size;
|
||
/* String table. */
|
||
bfd_byte *strings;
|
||
/* Allocated size of string table. */
|
||
size_t string_alc;
|
||
};
|
||
|
||
/* Build the .loader section. This is called by the XCOFF linker
|
||
emulation before_allocation routine. We must set the size of the
|
||
.loader section before the linker lays out the output file.
|
||
LIBPATH is the library path to search for shared objects; this is
|
||
normally built from the -L arguments passed to the linker. ENTRY
|
||
is the name of the entry point symbol (the -e linker option).
|
||
FILE_ALIGN is the alignment to use for sections within the file
|
||
(the -H linker option). MAXSTACK is the maximum stack size (the
|
||
-bmaxstack linker option). MAXDATA is the maximum data size (the
|
||
-bmaxdata linker option). GC is whether to do garbage collection
|
||
(the -bgc linker option). MODTYPE is the module type (the
|
||
-bmodtype linker option). TEXTRO is whether the text section must
|
||
be read only (the -btextro linker option). EXPORT_DEFINEDS is
|
||
whether all defined symbols should be exported (the -unix linker
|
||
option). SPECIAL_SECTIONS is set by this routine to csects with
|
||
magic names like _end. */
|
||
|
||
boolean
|
||
bfd_xcoff_size_dynamic_sections (output_bfd, info, libpath, entry,
|
||
file_align, maxstack, maxdata, gc,
|
||
modtype, textro, export_defineds,
|
||
special_sections)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
const char *libpath;
|
||
const char *entry;
|
||
unsigned long file_align;
|
||
unsigned long maxstack;
|
||
unsigned long maxdata;
|
||
boolean gc;
|
||
int modtype;
|
||
boolean textro;
|
||
boolean export_defineds;
|
||
asection **special_sections;
|
||
{
|
||
struct xcoff_link_hash_entry *hentry;
|
||
asection *lsec;
|
||
struct xcoff_loader_info ldinfo;
|
||
int i;
|
||
size_t impsize, impcount;
|
||
struct xcoff_import_file *fl;
|
||
struct internal_ldhdr *ldhdr;
|
||
bfd_size_type stoff;
|
||
register char *out;
|
||
asection *sec;
|
||
bfd *sub;
|
||
struct bfd_strtab_hash *debug_strtab;
|
||
bfd_byte *debug_contents = NULL;
|
||
|
||
if (! XCOFF_XVECP (output_bfd->xvec))
|
||
{
|
||
for (i = 0; i < 6; i++)
|
||
special_sections[i] = NULL;
|
||
return true;
|
||
}
|
||
|
||
ldinfo.failed = false;
|
||
ldinfo.output_bfd = output_bfd;
|
||
ldinfo.info = info;
|
||
ldinfo.export_defineds = export_defineds;
|
||
ldinfo.ldsym_count = 0;
|
||
ldinfo.string_size = 0;
|
||
ldinfo.strings = NULL;
|
||
ldinfo.string_alc = 0;
|
||
|
||
xcoff_data (output_bfd)->maxstack = maxstack;
|
||
xcoff_data (output_bfd)->maxdata = maxdata;
|
||
xcoff_data (output_bfd)->modtype = modtype;
|
||
|
||
xcoff_hash_table (info)->file_align = file_align;
|
||
xcoff_hash_table (info)->textro = textro;
|
||
|
||
hentry = xcoff_link_hash_lookup (xcoff_hash_table (info), entry,
|
||
false, false, true);
|
||
if (hentry != NULL)
|
||
hentry->flags |= XCOFF_ENTRY;
|
||
|
||
/* Garbage collect unused sections. */
|
||
if (info->relocateable
|
||
|| ! gc
|
||
|| hentry == NULL
|
||
|| (hentry->root.type != bfd_link_hash_defined
|
||
&& hentry->root.type != bfd_link_hash_defweak))
|
||
{
|
||
gc = false;
|
||
xcoff_hash_table (info)->gc = false;
|
||
|
||
/* We still need to call xcoff_mark, in order to set ldrel_count
|
||
correctly. */
|
||
for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
|
||
{
|
||
asection *o;
|
||
|
||
for (o = sub->sections; o != NULL; o = o->next)
|
||
{
|
||
if ((o->flags & SEC_MARK) == 0)
|
||
{
|
||
if (! xcoff_mark (info, o))
|
||
goto error_return;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (! xcoff_mark (info, hentry->root.u.def.section))
|
||
goto error_return;
|
||
xcoff_sweep (info);
|
||
xcoff_hash_table (info)->gc = true;
|
||
}
|
||
|
||
/* Return special sections to the caller. */
|
||
for (i = 0; i < 6; i++)
|
||
{
|
||
asection *sec;
|
||
|
||
sec = xcoff_hash_table (info)->special_sections[i];
|
||
if (sec != NULL
|
||
&& gc
|
||
&& (sec->flags & SEC_MARK) == 0)
|
||
sec = NULL;
|
||
special_sections[i] = sec;
|
||
}
|
||
|
||
if (info->input_bfds == NULL)
|
||
{
|
||
/* I'm not sure what to do in this bizarre case. */
|
||
return true;
|
||
}
|
||
|
||
xcoff_link_hash_traverse (xcoff_hash_table (info), xcoff_build_ldsyms,
|
||
(PTR) &ldinfo);
|
||
if (ldinfo.failed)
|
||
goto error_return;
|
||
|
||
/* Work out the size of the import file names. Each import file ID
|
||
consists of three null terminated strings: the path, the file
|
||
name, and the archive member name. The first entry in the list
|
||
of names is the path to use to find objects, which the linker has
|
||
passed in as the libpath argument. For some reason, the path
|
||
entry in the other import file names appears to always be empty. */
|
||
impsize = strlen (libpath) + 3;
|
||
impcount = 1;
|
||
for (fl = xcoff_hash_table (info)->imports; fl != NULL; fl = fl->next)
|
||
{
|
||
++impcount;
|
||
impsize += (strlen (fl->path)
|
||
+ strlen (fl->file)
|
||
+ strlen (fl->member)
|
||
+ 3);
|
||
}
|
||
|
||
/* Set up the .loader section header. */
|
||
ldhdr = &xcoff_hash_table (info)->ldhdr;
|
||
ldhdr->l_version = 1;
|
||
ldhdr->l_nsyms = ldinfo.ldsym_count;
|
||
ldhdr->l_nreloc = xcoff_hash_table (info)->ldrel_count;
|
||
ldhdr->l_istlen = impsize;
|
||
ldhdr->l_nimpid = impcount;
|
||
ldhdr->l_impoff = (LDHDRSZ
|
||
+ ldhdr->l_nsyms * LDSYMSZ
|
||
+ ldhdr->l_nreloc * LDRELSZ);
|
||
ldhdr->l_stlen = ldinfo.string_size;
|
||
stoff = ldhdr->l_impoff + impsize;
|
||
if (ldinfo.string_size == 0)
|
||
ldhdr->l_stoff = 0;
|
||
else
|
||
ldhdr->l_stoff = stoff;
|
||
|
||
/* We now know the final size of the .loader section. Allocate
|
||
space for it. */
|
||
lsec = xcoff_hash_table (info)->loader_section;
|
||
lsec->_raw_size = stoff + ldhdr->l_stlen;
|
||
lsec->contents = (bfd_byte *) bfd_zalloc (output_bfd, lsec->_raw_size);
|
||
if (lsec->contents == NULL)
|
||
goto error_return;
|
||
|
||
/* Set up the header. */
|
||
xcoff_swap_ldhdr_out (output_bfd, ldhdr,
|
||
(struct external_ldhdr *) lsec->contents);
|
||
|
||
/* Set up the import file names. */
|
||
out = (char *) lsec->contents + ldhdr->l_impoff;
|
||
strcpy (out, libpath);
|
||
out += strlen (libpath) + 1;
|
||
*out++ = '\0';
|
||
*out++ = '\0';
|
||
for (fl = xcoff_hash_table (info)->imports; fl != NULL; fl = fl->next)
|
||
{
|
||
register const char *s;
|
||
|
||
s = fl->path;
|
||
while ((*out++ = *s++) != '\0')
|
||
;
|
||
s = fl->file;
|
||
while ((*out++ = *s++) != '\0')
|
||
;
|
||
s = fl->member;
|
||
while ((*out++ = *s++) != '\0')
|
||
;
|
||
}
|
||
|
||
BFD_ASSERT ((bfd_size_type) ((bfd_byte *) out - lsec->contents) == stoff);
|
||
|
||
/* Set up the symbol string table. */
|
||
if (ldinfo.string_size > 0)
|
||
{
|
||
memcpy (out, ldinfo.strings, ldinfo.string_size);
|
||
free (ldinfo.strings);
|
||
ldinfo.strings = NULL;
|
||
}
|
||
|
||
/* We can't set up the symbol table or the relocs yet, because we
|
||
don't yet know the final position of the various sections. The
|
||
.loader symbols are written out when the corresponding normal
|
||
symbols are written out in xcoff_link_input_bfd or
|
||
xcoff_write_global_symbol. The .loader relocs are written out
|
||
when the corresponding normal relocs are handled in
|
||
xcoff_link_input_bfd. */
|
||
|
||
/* Allocate space for the magic sections. */
|
||
sec = xcoff_hash_table (info)->linkage_section;
|
||
if (sec->_raw_size > 0)
|
||
{
|
||
sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->_raw_size);
|
||
if (sec->contents == NULL)
|
||
goto error_return;
|
||
}
|
||
sec = xcoff_hash_table (info)->toc_section;
|
||
if (sec->_raw_size > 0)
|
||
{
|
||
sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->_raw_size);
|
||
if (sec->contents == NULL)
|
||
goto error_return;
|
||
}
|
||
sec = xcoff_hash_table (info)->descriptor_section;
|
||
if (sec->_raw_size > 0)
|
||
{
|
||
sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->_raw_size);
|
||
if (sec->contents == NULL)
|
||
goto error_return;
|
||
}
|
||
|
||
/* Now that we've done garbage collection, figure out the contents
|
||
of the .debug section. */
|
||
debug_strtab = xcoff_hash_table (info)->debug_strtab;
|
||
|
||
for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
|
||
{
|
||
asection *subdeb;
|
||
bfd_size_type symcount;
|
||
unsigned long *debug_index;
|
||
asection **csectpp;
|
||
bfd_byte *esym, *esymend;
|
||
bfd_size_type symesz;
|
||
|
||
if (sub->xvec != info->hash->creator)
|
||
continue;
|
||
subdeb = bfd_get_section_by_name (sub, ".debug");
|
||
if (subdeb == NULL || subdeb->_raw_size == 0)
|
||
continue;
|
||
|
||
if (info->strip == strip_all
|
||
|| info->strip == strip_debugger
|
||
|| info->discard == discard_all)
|
||
{
|
||
subdeb->_raw_size = 0;
|
||
continue;
|
||
}
|
||
|
||
if (! _bfd_coff_get_external_symbols (sub))
|
||
goto error_return;
|
||
|
||
symcount = obj_raw_syment_count (sub);
|
||
debug_index = ((unsigned long *)
|
||
bfd_zalloc (sub, symcount * sizeof (unsigned long)));
|
||
if (debug_index == NULL)
|
||
goto error_return;
|
||
xcoff_data (sub)->debug_indices = debug_index;
|
||
|
||
/* Grab the contents of the .debug section. We use malloc and
|
||
copy the names into the debug stringtab, rather than
|
||
bfd_alloc, because I expect that, when linking many files
|
||
together, many of the strings will be the same. Storing the
|
||
strings in the hash table should save space in this case. */
|
||
debug_contents = (bfd_byte *) bfd_malloc (subdeb->_raw_size);
|
||
if (debug_contents == NULL)
|
||
goto error_return;
|
||
if (! bfd_get_section_contents (sub, subdeb, (PTR) debug_contents,
|
||
(file_ptr) 0, subdeb->_raw_size))
|
||
goto error_return;
|
||
|
||
csectpp = xcoff_data (sub)->csects;
|
||
|
||
symesz = bfd_coff_symesz (sub);
|
||
esym = (bfd_byte *) obj_coff_external_syms (sub);
|
||
esymend = esym + symcount * symesz;
|
||
while (esym < esymend)
|
||
{
|
||
struct internal_syment sym;
|
||
|
||
bfd_coff_swap_sym_in (sub, (PTR) esym, (PTR) &sym);
|
||
|
||
*debug_index = (unsigned long) -1;
|
||
|
||
if (sym._n._n_n._n_zeroes == 0
|
||
&& *csectpp != NULL
|
||
&& (! gc
|
||
|| ((*csectpp)->flags & SEC_MARK) != 0
|
||
|| *csectpp == bfd_abs_section_ptr)
|
||
&& bfd_coff_symname_in_debug (sub, &sym))
|
||
{
|
||
char *name;
|
||
bfd_size_type indx;
|
||
|
||
name = (char *) debug_contents + sym._n._n_n._n_offset;
|
||
indx = _bfd_stringtab_add (debug_strtab, name, true, true);
|
||
if (indx == (bfd_size_type) -1)
|
||
goto error_return;
|
||
*debug_index = indx;
|
||
}
|
||
|
||
esym += (sym.n_numaux + 1) * symesz;
|
||
csectpp += sym.n_numaux + 1;
|
||
debug_index += sym.n_numaux + 1;
|
||
}
|
||
|
||
free (debug_contents);
|
||
debug_contents = NULL;
|
||
|
||
/* Clear the size of subdeb, so that it is not included directly
|
||
in the output file. */
|
||
subdeb->_raw_size = 0;
|
||
|
||
if (! info->keep_memory)
|
||
{
|
||
if (! _bfd_coff_free_symbols (sub))
|
||
goto error_return;
|
||
}
|
||
}
|
||
|
||
xcoff_hash_table (info)->debug_section->_raw_size =
|
||
_bfd_stringtab_size (debug_strtab);
|
||
|
||
return true;
|
||
|
||
error_return:
|
||
if (ldinfo.strings != NULL)
|
||
free (ldinfo.strings);
|
||
if (debug_contents != NULL)
|
||
free (debug_contents);
|
||
return false;
|
||
}
|
||
|
||
/* Add a symbol to the .loader symbols, if necessary. */
|
||
|
||
static boolean
|
||
xcoff_build_ldsyms (h, p)
|
||
struct xcoff_link_hash_entry *h;
|
||
PTR p;
|
||
{
|
||
struct xcoff_loader_info *ldinfo = (struct xcoff_loader_info *) p;
|
||
size_t len;
|
||
|
||
/* If this is a final link, and the symbol was defined as a common
|
||
symbol in a regular object file, and there was no definition in
|
||
any dynamic object, then the linker will have allocated space for
|
||
the symbol in a common section but the XCOFF_DEF_REGULAR flag
|
||
will not have been set. */
|
||
if (h->root.type == bfd_link_hash_defined
|
||
&& (h->flags & XCOFF_DEF_REGULAR) == 0
|
||
&& (h->flags & XCOFF_REF_REGULAR) != 0
|
||
&& (h->flags & XCOFF_DEF_DYNAMIC) == 0
|
||
&& (h->root.u.def.section->owner->flags & DYNAMIC) == 0)
|
||
h->flags |= XCOFF_DEF_REGULAR;
|
||
|
||
/* If all defined symbols should be exported, mark them now. We
|
||
don't want to export the actual functions, just the function
|
||
descriptors. */
|
||
if (ldinfo->export_defineds
|
||
&& (h->flags & XCOFF_DEF_REGULAR) != 0
|
||
&& h->root.root.string[0] != '.')
|
||
{
|
||
boolean export;
|
||
|
||
/* We don't export a symbol which is being defined by an object
|
||
included from an archive which contains a shared object. The
|
||
rationale is that if an archive contains both an unshared and
|
||
a shared object, then there must be some reason that the
|
||
unshared object is unshared, and we don't want to start
|
||
providing a shared version of it. In particular, this solves
|
||
a bug involving the _savefNN set of functions. gcc will call
|
||
those functions without providing a slot to restore the TOC,
|
||
so it is essential that these functions be linked in directly
|
||
and not from a shared object, which means that a shared
|
||
object which also happens to link them in must not export
|
||
them. This is confusing, but I haven't been able to think of
|
||
a different approach. Note that the symbols can, of course,
|
||
be exported explicitly. */
|
||
export = true;
|
||
if ((h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
&& h->root.u.def.section->owner != NULL
|
||
&& h->root.u.def.section->owner->my_archive != NULL)
|
||
{
|
||
bfd *arbfd, *member;
|
||
|
||
arbfd = h->root.u.def.section->owner->my_archive;
|
||
member = bfd_openr_next_archived_file (arbfd, (bfd *) NULL);
|
||
while (member != NULL)
|
||
{
|
||
if ((member->flags & DYNAMIC) != 0)
|
||
{
|
||
export = false;
|
||
break;
|
||
}
|
||
member = bfd_openr_next_archived_file (arbfd, member);
|
||
}
|
||
}
|
||
|
||
if (export)
|
||
h->flags |= XCOFF_EXPORT;
|
||
}
|
||
|
||
/* We don't want to garbage collect symbols which are not defined in
|
||
XCOFF files. This is a convenient place to mark them. */
|
||
if (xcoff_hash_table (ldinfo->info)->gc
|
||
&& (h->flags & XCOFF_MARK) == 0
|
||
&& (h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
&& (h->root.u.def.section->owner == NULL
|
||
|| (h->root.u.def.section->owner->xvec
|
||
!= ldinfo->info->hash->creator)))
|
||
h->flags |= XCOFF_MARK;
|
||
|
||
/* If this symbol is called and defined in a dynamic object, or it
|
||
is imported, then we need to set up global linkage code for it.
|
||
(Unless we did garbage collection and we didn't need this
|
||
symbol.) */
|
||
if ((h->flags & XCOFF_CALLED) != 0
|
||
&& (h->root.type == bfd_link_hash_undefined
|
||
|| h->root.type == bfd_link_hash_undefweak)
|
||
&& h->root.root.string[0] == '.'
|
||
&& h->descriptor != NULL
|
||
&& ((h->descriptor->flags & XCOFF_DEF_DYNAMIC) != 0
|
||
|| ((h->descriptor->flags & XCOFF_IMPORT) != 0
|
||
&& (h->descriptor->flags & XCOFF_DEF_REGULAR) == 0))
|
||
&& (! xcoff_hash_table (ldinfo->info)->gc
|
||
|| (h->flags & XCOFF_MARK) != 0))
|
||
{
|
||
asection *sec;
|
||
struct xcoff_link_hash_entry *hds;
|
||
|
||
sec = xcoff_hash_table (ldinfo->info)->linkage_section;
|
||
h->root.type = bfd_link_hash_defined;
|
||
h->root.u.def.section = sec;
|
||
h->root.u.def.value = sec->_raw_size;
|
||
h->smclas = XMC_GL;
|
||
h->flags |= XCOFF_DEF_REGULAR;
|
||
sec->_raw_size += XCOFF_GLINK_SIZE;
|
||
|
||
/* The global linkage code requires a TOC entry for the
|
||
descriptor. */
|
||
hds = h->descriptor;
|
||
BFD_ASSERT ((hds->root.type == bfd_link_hash_undefined
|
||
|| hds->root.type == bfd_link_hash_undefweak)
|
||
&& (hds->flags & XCOFF_DEF_REGULAR) == 0);
|
||
hds->flags |= XCOFF_MARK;
|
||
if (hds->toc_section == NULL)
|
||
{
|
||
hds->toc_section = xcoff_hash_table (ldinfo->info)->toc_section;
|
||
hds->u.toc_offset = hds->toc_section->_raw_size;
|
||
hds->toc_section->_raw_size += 4;
|
||
++xcoff_hash_table (ldinfo->info)->ldrel_count;
|
||
++hds->toc_section->reloc_count;
|
||
hds->indx = -2;
|
||
hds->flags |= XCOFF_SET_TOC | XCOFF_LDREL;
|
||
|
||
/* We need to call xcoff_build_ldsyms recursively here,
|
||
because we may already have passed hds on the traversal. */
|
||
xcoff_build_ldsyms (hds, p);
|
||
}
|
||
}
|
||
|
||
/* If this symbol is exported, but not defined, we need to try to
|
||
define it. */
|
||
if ((h->flags & XCOFF_EXPORT) != 0
|
||
&& (h->flags & XCOFF_IMPORT) == 0
|
||
&& (h->flags & XCOFF_DEF_REGULAR) == 0
|
||
&& (h->flags & XCOFF_DEF_DYNAMIC) == 0
|
||
&& (h->root.type == bfd_link_hash_undefined
|
||
|| h->root.type == bfd_link_hash_undefweak))
|
||
{
|
||
if ((h->flags & XCOFF_DESCRIPTOR) != 0
|
||
&& (h->descriptor->root.type == bfd_link_hash_defined
|
||
|| h->descriptor->root.type == bfd_link_hash_defweak))
|
||
{
|
||
asection *sec;
|
||
|
||
/* This is an undefined function descriptor associated with
|
||
a defined entry point. We can build up a function
|
||
descriptor ourselves. Believe it or not, the AIX linker
|
||
actually does this, and there are cases where we need to
|
||
do it as well. */
|
||
sec = xcoff_hash_table (ldinfo->info)->descriptor_section;
|
||
h->root.type = bfd_link_hash_defined;
|
||
h->root.u.def.section = sec;
|
||
h->root.u.def.value = sec->_raw_size;
|
||
h->smclas = XMC_DS;
|
||
h->flags |= XCOFF_DEF_REGULAR;
|
||
sec->_raw_size += 12;
|
||
|
||
/* A function descriptor uses two relocs: one for the
|
||
associated code, and one for the TOC address. */
|
||
xcoff_hash_table (ldinfo->info)->ldrel_count += 2;
|
||
sec->reloc_count += 2;
|
||
|
||
/* We handle writing out the contents of the descriptor in
|
||
xcoff_write_global_symbol. */
|
||
}
|
||
else
|
||
{
|
||
(*_bfd_error_handler)
|
||
("warning: attempt to export undefined symbol `%s'",
|
||
h->root.root.string);
|
||
h->ldsym = NULL;
|
||
return true;
|
||
}
|
||
}
|
||
|
||
/* If this is still a common symbol, and it wasn't garbage
|
||
collected, we need to actually allocate space for it in the .bss
|
||
section. */
|
||
if (h->root.type == bfd_link_hash_common
|
||
&& (! xcoff_hash_table (ldinfo->info)->gc
|
||
|| (h->flags & XCOFF_MARK) != 0)
|
||
&& h->root.u.c.p->section->_raw_size == 0)
|
||
{
|
||
BFD_ASSERT (bfd_is_com_section (h->root.u.c.p->section));
|
||
h->root.u.c.p->section->_raw_size = h->root.u.c.size;
|
||
}
|
||
|
||
/* We need to add a symbol to the .loader section if it is mentioned
|
||
in a reloc which we are copying to the .loader section and it was
|
||
not defined or common, or if it is the entry point, or if it is
|
||
being exported. */
|
||
|
||
if (((h->flags & XCOFF_LDREL) == 0
|
||
|| h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak
|
||
|| h->root.type == bfd_link_hash_common)
|
||
&& (h->flags & XCOFF_ENTRY) == 0
|
||
&& (h->flags & XCOFF_EXPORT) == 0)
|
||
{
|
||
h->ldsym = NULL;
|
||
return true;
|
||
}
|
||
|
||
/* We don't need to add this symbol if we did garbage collection and
|
||
we did not mark this symbol. */
|
||
if (xcoff_hash_table (ldinfo->info)->gc
|
||
&& (h->flags & XCOFF_MARK) == 0)
|
||
{
|
||
h->ldsym = NULL;
|
||
return true;
|
||
}
|
||
|
||
/* We may have already processed this symbol due to the recursive
|
||
call above. */
|
||
if ((h->flags & XCOFF_BUILT_LDSYM) != 0)
|
||
return true;
|
||
|
||
/* We need to add this symbol to the .loader symbols. */
|
||
|
||
BFD_ASSERT (h->ldsym == NULL);
|
||
h->ldsym = ((struct internal_ldsym *)
|
||
bfd_zalloc (ldinfo->output_bfd,
|
||
sizeof (struct internal_ldsym)));
|
||
if (h->ldsym == NULL)
|
||
{
|
||
ldinfo->failed = true;
|
||
return false;
|
||
}
|
||
|
||
if ((h->flags & XCOFF_IMPORT) != 0)
|
||
h->ldsym->l_ifile = h->ldindx;
|
||
|
||
/* The first 3 symbol table indices are reserved to indicate the
|
||
sections. */
|
||
h->ldindx = ldinfo->ldsym_count + 3;
|
||
|
||
++ldinfo->ldsym_count;
|
||
|
||
len = strlen (h->root.root.string);
|
||
if (len <= SYMNMLEN)
|
||
strncpy (h->ldsym->_l._l_name, h->root.root.string, SYMNMLEN);
|
||
else
|
||
{
|
||
if (ldinfo->string_size + len + 3 > ldinfo->string_alc)
|
||
{
|
||
size_t newalc;
|
||
bfd_byte *newstrings;
|
||
|
||
newalc = ldinfo->string_alc * 2;
|
||
if (newalc == 0)
|
||
newalc = 32;
|
||
while (ldinfo->string_size + len + 3 > newalc)
|
||
newalc *= 2;
|
||
|
||
newstrings = ((bfd_byte *)
|
||
bfd_realloc ((PTR) ldinfo->strings, newalc));
|
||
if (newstrings == NULL)
|
||
{
|
||
ldinfo->failed = true;
|
||
return false;
|
||
}
|
||
ldinfo->string_alc = newalc;
|
||
ldinfo->strings = newstrings;
|
||
}
|
||
|
||
bfd_put_16 (ldinfo->output_bfd, len + 1,
|
||
ldinfo->strings + ldinfo->string_size);
|
||
strcpy (ldinfo->strings + ldinfo->string_size + 2, h->root.root.string);
|
||
h->ldsym->_l._l_l._l_zeroes = 0;
|
||
h->ldsym->_l._l_l._l_offset = ldinfo->string_size + 2;
|
||
ldinfo->string_size += len + 3;
|
||
}
|
||
|
||
h->flags |= XCOFF_BUILT_LDSYM;
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Do the final link step. */
|
||
|
||
boolean
|
||
_bfd_xcoff_bfd_final_link (abfd, info)
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
{
|
||
bfd_size_type symesz;
|
||
struct xcoff_final_link_info finfo;
|
||
asection *o;
|
||
struct bfd_link_order *p;
|
||
size_t max_contents_size;
|
||
size_t max_sym_count;
|
||
size_t max_lineno_count;
|
||
size_t max_reloc_count;
|
||
size_t max_output_reloc_count;
|
||
file_ptr rel_filepos;
|
||
unsigned int relsz;
|
||
file_ptr line_filepos;
|
||
unsigned int linesz;
|
||
bfd *sub;
|
||
bfd_byte *external_relocs = NULL;
|
||
char strbuf[STRING_SIZE_SIZE];
|
||
|
||
if (info->shared)
|
||
abfd->flags |= DYNAMIC;
|
||
|
||
symesz = bfd_coff_symesz (abfd);
|
||
|
||
finfo.info = info;
|
||
finfo.output_bfd = abfd;
|
||
finfo.strtab = NULL;
|
||
finfo.section_info = NULL;
|
||
finfo.last_file_index = -1;
|
||
finfo.toc_symindx = -1;
|
||
finfo.internal_syms = NULL;
|
||
finfo.sym_indices = NULL;
|
||
finfo.outsyms = NULL;
|
||
finfo.linenos = NULL;
|
||
finfo.contents = NULL;
|
||
finfo.external_relocs = NULL;
|
||
|
||
finfo.ldsym = ((struct external_ldsym *)
|
||
(xcoff_hash_table (info)->loader_section->contents
|
||
+ LDHDRSZ));
|
||
finfo.ldrel = ((struct external_ldrel *)
|
||
(xcoff_hash_table (info)->loader_section->contents
|
||
+ LDHDRSZ
|
||
+ xcoff_hash_table (info)->ldhdr.l_nsyms * LDSYMSZ));
|
||
|
||
xcoff_data (abfd)->coff.link_info = info;
|
||
|
||
finfo.strtab = _bfd_stringtab_init ();
|
||
if (finfo.strtab == NULL)
|
||
goto error_return;
|
||
|
||
/* Count the line number and relocation entries required for the
|
||
output file. Determine a few maximum sizes. */
|
||
max_contents_size = 0;
|
||
max_lineno_count = 0;
|
||
max_reloc_count = 0;
|
||
for (o = abfd->sections; o != NULL; o = o->next)
|
||
{
|
||
o->reloc_count = 0;
|
||
o->lineno_count = 0;
|
||
for (p = o->link_order_head; p != NULL; p = p->next)
|
||
{
|
||
if (p->type == bfd_indirect_link_order)
|
||
{
|
||
asection *sec;
|
||
|
||
sec = p->u.indirect.section;
|
||
|
||
/* Mark all sections which are to be included in the
|
||
link. This will normally be every section. We need
|
||
to do this so that we can identify any sections which
|
||
the linker has decided to not include. */
|
||
sec->linker_mark = true;
|
||
|
||
if (info->strip == strip_none
|
||
|| info->strip == strip_some)
|
||
o->lineno_count += sec->lineno_count;
|
||
|
||
o->reloc_count += sec->reloc_count;
|
||
|
||
if (sec->_raw_size > max_contents_size)
|
||
max_contents_size = sec->_raw_size;
|
||
if (sec->lineno_count > max_lineno_count)
|
||
max_lineno_count = sec->lineno_count;
|
||
if (coff_section_data (sec->owner, sec) != NULL
|
||
&& xcoff_section_data (sec->owner, sec) != NULL
|
||
&& (xcoff_section_data (sec->owner, sec)->lineno_count
|
||
> max_lineno_count))
|
||
max_lineno_count =
|
||
xcoff_section_data (sec->owner, sec)->lineno_count;
|
||
if (sec->reloc_count > max_reloc_count)
|
||
max_reloc_count = sec->reloc_count;
|
||
}
|
||
else if (p->type == bfd_section_reloc_link_order
|
||
|| p->type == bfd_symbol_reloc_link_order)
|
||
++o->reloc_count;
|
||
}
|
||
}
|
||
|
||
/* Compute the file positions for all the sections. */
|
||
if (abfd->output_has_begun)
|
||
{
|
||
if (xcoff_hash_table (info)->file_align != 0)
|
||
abort ();
|
||
}
|
||
else
|
||
{
|
||
bfd_vma file_align;
|
||
|
||
file_align = xcoff_hash_table (info)->file_align;
|
||
if (file_align != 0)
|
||
{
|
||
boolean saw_contents;
|
||
int indx;
|
||
asection **op;
|
||
file_ptr sofar;
|
||
|
||
/* Insert .pad sections before every section which has
|
||
contents and is loaded, if it is preceded by some other
|
||
section which has contents and is loaded. */
|
||
saw_contents = true;
|
||
for (op = &abfd->sections; *op != NULL; op = &(*op)->next)
|
||
{
|
||
if (strcmp ((*op)->name, ".pad") == 0)
|
||
saw_contents = false;
|
||
else if (((*op)->flags & SEC_HAS_CONTENTS) != 0
|
||
&& ((*op)->flags & SEC_LOAD) != 0)
|
||
{
|
||
if (! saw_contents)
|
||
saw_contents = true;
|
||
else
|
||
{
|
||
asection *n, *hold;
|
||
|
||
hold = *op;
|
||
*op = NULL;
|
||
n = bfd_make_section_anyway (abfd, ".pad");
|
||
BFD_ASSERT (*op == n);
|
||
n->next = hold;
|
||
n->flags = SEC_HAS_CONTENTS;
|
||
n->alignment_power = 0;
|
||
saw_contents = false;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Reset the section indices after inserting the new
|
||
sections. */
|
||
indx = 0;
|
||
for (o = abfd->sections; o != NULL; o = o->next)
|
||
{
|
||
++indx;
|
||
o->target_index = indx;
|
||
}
|
||
BFD_ASSERT ((unsigned int) indx == abfd->section_count);
|
||
|
||
/* Work out appropriate sizes for the .pad sections to force
|
||
each section to land on a page boundary. This bit of
|
||
code knows what compute_section_file_positions is going
|
||
to do. */
|
||
sofar = bfd_coff_filhsz (abfd);
|
||
sofar += bfd_coff_aoutsz (abfd);
|
||
sofar += abfd->section_count * bfd_coff_scnhsz (abfd);
|
||
for (o = abfd->sections; o != NULL; o = o->next)
|
||
if (o->reloc_count >= 0xffff || o->lineno_count >= 0xffff)
|
||
sofar += bfd_coff_scnhsz (abfd);
|
||
|
||
for (o = abfd->sections; o != NULL; o = o->next)
|
||
{
|
||
if (strcmp (o->name, ".pad") == 0)
|
||
{
|
||
bfd_vma pageoff;
|
||
|
||
BFD_ASSERT (o->_raw_size == 0);
|
||
pageoff = sofar & (file_align - 1);
|
||
if (pageoff != 0)
|
||
{
|
||
o->_raw_size = file_align - pageoff;
|
||
sofar += file_align - pageoff;
|
||
o->flags |= SEC_HAS_CONTENTS;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if ((o->flags & SEC_HAS_CONTENTS) != 0)
|
||
sofar += BFD_ALIGN (o->_raw_size,
|
||
1 << o->alignment_power);
|
||
}
|
||
}
|
||
}
|
||
|
||
if (! bfd_coff_compute_section_file_positions (abfd))
|
||
goto error_return;
|
||
}
|
||
|
||
/* Allocate space for the pointers we need to keep for the relocs. */
|
||
{
|
||
unsigned int i;
|
||
|
||
/* We use section_count + 1, rather than section_count, because
|
||
the target_index fields are 1 based. */
|
||
finfo.section_info =
|
||
((struct xcoff_link_section_info *)
|
||
bfd_malloc ((abfd->section_count + 1)
|
||
* sizeof (struct xcoff_link_section_info)));
|
||
if (finfo.section_info == NULL)
|
||
goto error_return;
|
||
for (i = 0; i <= abfd->section_count; i++)
|
||
{
|
||
finfo.section_info[i].relocs = NULL;
|
||
finfo.section_info[i].rel_hashes = NULL;
|
||
finfo.section_info[i].toc_rel_hashes = NULL;
|
||
}
|
||
}
|
||
|
||
/* Set the file positions for the relocs. */
|
||
rel_filepos = obj_relocbase (abfd);
|
||
relsz = bfd_coff_relsz (abfd);
|
||
max_output_reloc_count = 0;
|
||
for (o = abfd->sections; o != NULL; o = o->next)
|
||
{
|
||
if (o->reloc_count == 0)
|
||
o->rel_filepos = 0;
|
||
else
|
||
{
|
||
o->flags |= SEC_RELOC;
|
||
o->rel_filepos = rel_filepos;
|
||
rel_filepos += o->reloc_count * relsz;
|
||
|
||
/* We don't know the indices of global symbols until we have
|
||
written out all the local symbols. For each section in
|
||
the output file, we keep an array of pointers to hash
|
||
table entries. Each entry in the array corresponds to a
|
||
reloc. When we find a reloc against a global symbol, we
|
||
set the corresponding entry in this array so that we can
|
||
fix up the symbol index after we have written out all the
|
||
local symbols.
|
||
|
||
Because of this problem, we also keep the relocs in
|
||
memory until the end of the link. This wastes memory.
|
||
We could backpatch the file later, I suppose, although it
|
||
would be slow. */
|
||
finfo.section_info[o->target_index].relocs =
|
||
((struct internal_reloc *)
|
||
bfd_malloc (o->reloc_count * sizeof (struct internal_reloc)));
|
||
finfo.section_info[o->target_index].rel_hashes =
|
||
((struct xcoff_link_hash_entry **)
|
||
bfd_malloc (o->reloc_count
|
||
* sizeof (struct xcoff_link_hash_entry *)));
|
||
if (finfo.section_info[o->target_index].relocs == NULL
|
||
|| finfo.section_info[o->target_index].rel_hashes == NULL)
|
||
goto error_return;
|
||
|
||
if (o->reloc_count > max_output_reloc_count)
|
||
max_output_reloc_count = o->reloc_count;
|
||
}
|
||
}
|
||
|
||
/* We now know the size of the relocs, so we can determine the file
|
||
positions of the line numbers. */
|
||
line_filepos = rel_filepos;
|
||
finfo.line_filepos = line_filepos;
|
||
linesz = bfd_coff_linesz (abfd);
|
||
for (o = abfd->sections; o != NULL; o = o->next)
|
||
{
|
||
if (o->lineno_count == 0)
|
||
o->line_filepos = 0;
|
||
else
|
||
{
|
||
o->line_filepos = line_filepos;
|
||
line_filepos += o->lineno_count * linesz;
|
||
}
|
||
|
||
/* Reset the reloc and lineno counts, so that we can use them to
|
||
count the number of entries we have output so far. */
|
||
o->reloc_count = 0;
|
||
o->lineno_count = 0;
|
||
}
|
||
|
||
obj_sym_filepos (abfd) = line_filepos;
|
||
|
||
/* Figure out the largest number of symbols in an input BFD. Take
|
||
the opportunity to clear the output_has_begun fields of all the
|
||
input BFD's. We want at least 6 symbols, since that is the
|
||
number which xcoff_write_global_symbol may need. */
|
||
max_sym_count = 6;
|
||
for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
|
||
{
|
||
size_t sz;
|
||
|
||
sub->output_has_begun = false;
|
||
sz = obj_raw_syment_count (sub);
|
||
if (sz > max_sym_count)
|
||
max_sym_count = sz;
|
||
}
|
||
|
||
/* Allocate some buffers used while linking. */
|
||
finfo.internal_syms = ((struct internal_syment *)
|
||
bfd_malloc (max_sym_count
|
||
* sizeof (struct internal_syment)));
|
||
finfo.sym_indices = (long *) bfd_malloc (max_sym_count * sizeof (long));
|
||
finfo.outsyms = ((bfd_byte *)
|
||
bfd_malloc ((size_t) ((max_sym_count + 1) * symesz)));
|
||
finfo.linenos = (bfd_byte *) bfd_malloc (max_lineno_count
|
||
* bfd_coff_linesz (abfd));
|
||
finfo.contents = (bfd_byte *) bfd_malloc (max_contents_size);
|
||
finfo.external_relocs = (bfd_byte *) bfd_malloc (max_reloc_count * relsz);
|
||
if ((finfo.internal_syms == NULL && max_sym_count > 0)
|
||
|| (finfo.sym_indices == NULL && max_sym_count > 0)
|
||
|| finfo.outsyms == NULL
|
||
|| (finfo.linenos == NULL && max_lineno_count > 0)
|
||
|| (finfo.contents == NULL && max_contents_size > 0)
|
||
|| (finfo.external_relocs == NULL && max_reloc_count > 0))
|
||
goto error_return;
|
||
|
||
obj_raw_syment_count (abfd) = 0;
|
||
xcoff_data (abfd)->toc = (bfd_vma) -1;
|
||
|
||
/* We now know the position of everything in the file, except that
|
||
we don't know the size of the symbol table and therefore we don't
|
||
know where the string table starts. We just build the string
|
||
table in memory as we go along. We process all the relocations
|
||
for a single input file at once. */
|
||
for (o = abfd->sections; o != NULL; o = o->next)
|
||
{
|
||
for (p = o->link_order_head; p != NULL; p = p->next)
|
||
{
|
||
if (p->type == bfd_indirect_link_order
|
||
&& p->u.indirect.section->owner->xvec == abfd->xvec)
|
||
{
|
||
sub = p->u.indirect.section->owner;
|
||
if (! sub->output_has_begun)
|
||
{
|
||
if (! xcoff_link_input_bfd (&finfo, sub))
|
||
goto error_return;
|
||
sub->output_has_begun = true;
|
||
}
|
||
}
|
||
else if (p->type == bfd_section_reloc_link_order
|
||
|| p->type == bfd_symbol_reloc_link_order)
|
||
{
|
||
if (! xcoff_reloc_link_order (abfd, &finfo, o, p))
|
||
goto error_return;
|
||
}
|
||
else
|
||
{
|
||
if (! _bfd_default_link_order (abfd, info, o, p))
|
||
goto error_return;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Free up the buffers used by xcoff_link_input_bfd. */
|
||
|
||
if (finfo.internal_syms != NULL)
|
||
{
|
||
free (finfo.internal_syms);
|
||
finfo.internal_syms = NULL;
|
||
}
|
||
if (finfo.sym_indices != NULL)
|
||
{
|
||
free (finfo.sym_indices);
|
||
finfo.sym_indices = NULL;
|
||
}
|
||
if (finfo.linenos != NULL)
|
||
{
|
||
free (finfo.linenos);
|
||
finfo.linenos = NULL;
|
||
}
|
||
if (finfo.contents != NULL)
|
||
{
|
||
free (finfo.contents);
|
||
finfo.contents = NULL;
|
||
}
|
||
if (finfo.external_relocs != NULL)
|
||
{
|
||
free (finfo.external_relocs);
|
||
finfo.external_relocs = NULL;
|
||
}
|
||
|
||
/* The value of the last C_FILE symbol is supposed to be -1. Write
|
||
it out again. */
|
||
if (finfo.last_file_index != -1)
|
||
{
|
||
finfo.last_file.n_value = -1;
|
||
bfd_coff_swap_sym_out (abfd, (PTR) &finfo.last_file,
|
||
(PTR) finfo.outsyms);
|
||
if (bfd_seek (abfd,
|
||
(obj_sym_filepos (abfd)
|
||
+ finfo.last_file_index * symesz),
|
||
SEEK_SET) != 0
|
||
|| bfd_write (finfo.outsyms, symesz, 1, abfd) != symesz)
|
||
goto error_return;
|
||
}
|
||
|
||
/* Write out all the global symbols which do not come from XCOFF
|
||
input files. */
|
||
xcoff_link_hash_traverse (xcoff_hash_table (info),
|
||
xcoff_write_global_symbol,
|
||
(PTR) &finfo);
|
||
|
||
if (finfo.outsyms != NULL)
|
||
{
|
||
free (finfo.outsyms);
|
||
finfo.outsyms = NULL;
|
||
}
|
||
|
||
/* Now that we have written out all the global symbols, we know the
|
||
symbol indices to use for relocs against them, and we can finally
|
||
write out the relocs. */
|
||
external_relocs = (bfd_byte *) bfd_malloc (max_output_reloc_count * relsz);
|
||
if (external_relocs == NULL && max_output_reloc_count != 0)
|
||
goto error_return;
|
||
|
||
for (o = abfd->sections; o != NULL; o = o->next)
|
||
{
|
||
struct internal_reloc *irel;
|
||
struct internal_reloc *irelend;
|
||
struct xcoff_link_hash_entry **rel_hash;
|
||
struct xcoff_toc_rel_hash *toc_rel_hash;
|
||
bfd_byte *erel;
|
||
|
||
if (o->reloc_count == 0)
|
||
continue;
|
||
|
||
irel = finfo.section_info[o->target_index].relocs;
|
||
irelend = irel + o->reloc_count;
|
||
rel_hash = finfo.section_info[o->target_index].rel_hashes;
|
||
for (; irel < irelend; irel++, rel_hash++, erel += relsz)
|
||
{
|
||
if (*rel_hash != NULL)
|
||
{
|
||
if ((*rel_hash)->indx < 0)
|
||
{
|
||
if (! ((*info->callbacks->unattached_reloc)
|
||
(info, (*rel_hash)->root.root.string,
|
||
(bfd *) NULL, o, irel->r_vaddr)))
|
||
goto error_return;
|
||
(*rel_hash)->indx = 0;
|
||
}
|
||
irel->r_symndx = (*rel_hash)->indx;
|
||
}
|
||
}
|
||
|
||
for (toc_rel_hash = finfo.section_info[o->target_index].toc_rel_hashes;
|
||
toc_rel_hash != NULL;
|
||
toc_rel_hash = toc_rel_hash->next)
|
||
{
|
||
if (toc_rel_hash->h->u.toc_indx < 0)
|
||
{
|
||
if (! ((*info->callbacks->unattached_reloc)
|
||
(info, toc_rel_hash->h->root.root.string,
|
||
(bfd *) NULL, o, toc_rel_hash->rel->r_vaddr)))
|
||
goto error_return;
|
||
toc_rel_hash->h->u.toc_indx = 0;
|
||
}
|
||
toc_rel_hash->rel->r_symndx = toc_rel_hash->h->u.toc_indx;
|
||
}
|
||
|
||
/* XCOFF requires that the relocs be sorted by address. We tend
|
||
to produce them in the order in which their containing csects
|
||
appear in the symbol table, which is not necessarily by
|
||
address. So we sort them here. There may be a better way to
|
||
do this. */
|
||
qsort ((PTR) finfo.section_info[o->target_index].relocs,
|
||
o->reloc_count, sizeof (struct internal_reloc),
|
||
xcoff_sort_relocs);
|
||
|
||
irel = finfo.section_info[o->target_index].relocs;
|
||
irelend = irel + o->reloc_count;
|
||
erel = external_relocs;
|
||
for (; irel < irelend; irel++, rel_hash++, erel += relsz)
|
||
bfd_coff_swap_reloc_out (abfd, (PTR) irel, (PTR) erel);
|
||
|
||
if (bfd_seek (abfd, o->rel_filepos, SEEK_SET) != 0
|
||
|| bfd_write ((PTR) external_relocs, relsz, o->reloc_count,
|
||
abfd) != relsz * o->reloc_count)
|
||
goto error_return;
|
||
}
|
||
|
||
if (external_relocs != NULL)
|
||
{
|
||
free (external_relocs);
|
||
external_relocs = NULL;
|
||
}
|
||
|
||
/* Free up the section information. */
|
||
if (finfo.section_info != NULL)
|
||
{
|
||
unsigned int i;
|
||
|
||
for (i = 0; i < abfd->section_count; i++)
|
||
{
|
||
if (finfo.section_info[i].relocs != NULL)
|
||
free (finfo.section_info[i].relocs);
|
||
if (finfo.section_info[i].rel_hashes != NULL)
|
||
free (finfo.section_info[i].rel_hashes);
|
||
}
|
||
free (finfo.section_info);
|
||
finfo.section_info = NULL;
|
||
}
|
||
|
||
/* Write out the loader section contents. */
|
||
BFD_ASSERT ((bfd_byte *) finfo.ldrel
|
||
== (xcoff_hash_table (info)->loader_section->contents
|
||
+ xcoff_hash_table (info)->ldhdr.l_impoff));
|
||
o = xcoff_hash_table (info)->loader_section;
|
||
if (! bfd_set_section_contents (abfd, o->output_section,
|
||
o->contents, o->output_offset,
|
||
o->_raw_size))
|
||
goto error_return;
|
||
|
||
/* Write out the magic sections. */
|
||
o = xcoff_hash_table (info)->linkage_section;
|
||
if (o->_raw_size > 0
|
||
&& ! bfd_set_section_contents (abfd, o->output_section, o->contents,
|
||
o->output_offset, o->_raw_size))
|
||
goto error_return;
|
||
o = xcoff_hash_table (info)->toc_section;
|
||
if (o->_raw_size > 0
|
||
&& ! bfd_set_section_contents (abfd, o->output_section, o->contents,
|
||
o->output_offset, o->_raw_size))
|
||
goto error_return;
|
||
o = xcoff_hash_table (info)->descriptor_section;
|
||
if (o->_raw_size > 0
|
||
&& ! bfd_set_section_contents (abfd, o->output_section, o->contents,
|
||
o->output_offset, o->_raw_size))
|
||
goto error_return;
|
||
|
||
/* Write out the string table. */
|
||
if (bfd_seek (abfd,
|
||
(obj_sym_filepos (abfd)
|
||
+ obj_raw_syment_count (abfd) * symesz),
|
||
SEEK_SET) != 0)
|
||
goto error_return;
|
||
bfd_h_put_32 (abfd,
|
||
_bfd_stringtab_size (finfo.strtab) + STRING_SIZE_SIZE,
|
||
(bfd_byte *) strbuf);
|
||
if (bfd_write (strbuf, 1, STRING_SIZE_SIZE, abfd) != STRING_SIZE_SIZE)
|
||
goto error_return;
|
||
if (! _bfd_stringtab_emit (abfd, finfo.strtab))
|
||
goto error_return;
|
||
|
||
_bfd_stringtab_free (finfo.strtab);
|
||
|
||
/* Write out the debugging string table. */
|
||
o = xcoff_hash_table (info)->debug_section;
|
||
if (o != NULL)
|
||
{
|
||
struct bfd_strtab_hash *debug_strtab;
|
||
|
||
debug_strtab = xcoff_hash_table (info)->debug_strtab;
|
||
BFD_ASSERT (o->output_section->_raw_size - o->output_offset
|
||
>= _bfd_stringtab_size (debug_strtab));
|
||
if (bfd_seek (abfd,
|
||
o->output_section->filepos + o->output_offset,
|
||
SEEK_SET) != 0)
|
||
goto error_return;
|
||
if (! _bfd_stringtab_emit (abfd, debug_strtab))
|
||
goto error_return;
|
||
}
|
||
|
||
/* Setting bfd_get_symcount to 0 will cause write_object_contents to
|
||
not try to write out the symbols. */
|
||
bfd_get_symcount (abfd) = 0;
|
||
|
||
return true;
|
||
|
||
error_return:
|
||
if (finfo.strtab != NULL)
|
||
_bfd_stringtab_free (finfo.strtab);
|
||
if (finfo.section_info != NULL)
|
||
{
|
||
unsigned int i;
|
||
|
||
for (i = 0; i < abfd->section_count; i++)
|
||
{
|
||
if (finfo.section_info[i].relocs != NULL)
|
||
free (finfo.section_info[i].relocs);
|
||
if (finfo.section_info[i].rel_hashes != NULL)
|
||
free (finfo.section_info[i].rel_hashes);
|
||
}
|
||
free (finfo.section_info);
|
||
}
|
||
if (finfo.internal_syms != NULL)
|
||
free (finfo.internal_syms);
|
||
if (finfo.sym_indices != NULL)
|
||
free (finfo.sym_indices);
|
||
if (finfo.outsyms != NULL)
|
||
free (finfo.outsyms);
|
||
if (finfo.linenos != NULL)
|
||
free (finfo.linenos);
|
||
if (finfo.contents != NULL)
|
||
free (finfo.contents);
|
||
if (finfo.external_relocs != NULL)
|
||
free (finfo.external_relocs);
|
||
if (external_relocs != NULL)
|
||
free (external_relocs);
|
||
return false;
|
||
}
|
||
|
||
/* Link an input file into the linker output file. This function
|
||
handles all the sections and relocations of the input file at once. */
|
||
|
||
static boolean
|
||
xcoff_link_input_bfd (finfo, input_bfd)
|
||
struct xcoff_final_link_info *finfo;
|
||
bfd *input_bfd;
|
||
{
|
||
bfd *output_bfd;
|
||
const char *strings;
|
||
bfd_size_type syment_base;
|
||
unsigned int n_tmask;
|
||
unsigned int n_btshft;
|
||
boolean copy, hash;
|
||
bfd_size_type isymesz;
|
||
bfd_size_type osymesz;
|
||
bfd_size_type linesz;
|
||
bfd_byte *esym;
|
||
bfd_byte *esym_end;
|
||
struct xcoff_link_hash_entry **sym_hash;
|
||
struct internal_syment *isymp;
|
||
asection **csectpp;
|
||
unsigned long *debug_index;
|
||
long *indexp;
|
||
unsigned long output_index;
|
||
bfd_byte *outsym;
|
||
unsigned int incls;
|
||
asection *oline;
|
||
boolean keep_syms;
|
||
asection *o;
|
||
|
||
/* We can just skip DYNAMIC files, unless this is a static link. */
|
||
if ((input_bfd->flags & DYNAMIC) != 0
|
||
&& ! finfo->info->static_link)
|
||
return true;
|
||
|
||
/* Move all the symbols to the output file. */
|
||
|
||
output_bfd = finfo->output_bfd;
|
||
strings = NULL;
|
||
syment_base = obj_raw_syment_count (output_bfd);
|
||
isymesz = bfd_coff_symesz (input_bfd);
|
||
osymesz = bfd_coff_symesz (output_bfd);
|
||
linesz = bfd_coff_linesz (input_bfd);
|
||
BFD_ASSERT (linesz == bfd_coff_linesz (output_bfd));
|
||
|
||
n_tmask = coff_data (input_bfd)->local_n_tmask;
|
||
n_btshft = coff_data (input_bfd)->local_n_btshft;
|
||
|
||
/* Define macros so that ISFCN, et. al., macros work correctly. */
|
||
#define N_TMASK n_tmask
|
||
#define N_BTSHFT n_btshft
|
||
|
||
copy = false;
|
||
if (! finfo->info->keep_memory)
|
||
copy = true;
|
||
hash = true;
|
||
if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
|
||
hash = false;
|
||
|
||
if (! _bfd_coff_get_external_symbols (input_bfd))
|
||
return false;
|
||
|
||
esym = (bfd_byte *) obj_coff_external_syms (input_bfd);
|
||
esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz;
|
||
sym_hash = obj_xcoff_sym_hashes (input_bfd);
|
||
csectpp = xcoff_data (input_bfd)->csects;
|
||
debug_index = xcoff_data (input_bfd)->debug_indices;
|
||
isymp = finfo->internal_syms;
|
||
indexp = finfo->sym_indices;
|
||
output_index = syment_base;
|
||
outsym = finfo->outsyms;
|
||
incls = 0;
|
||
oline = NULL;
|
||
|
||
while (esym < esym_end)
|
||
{
|
||
struct internal_syment isym;
|
||
union internal_auxent aux;
|
||
int smtyp = 0;
|
||
boolean skip;
|
||
boolean require;
|
||
int add;
|
||
|
||
bfd_coff_swap_sym_in (input_bfd, (PTR) esym, (PTR) isymp);
|
||
|
||
/* If this is a C_EXT or C_HIDEXT symbol, we need the csect
|
||
information. */
|
||
if (isymp->n_sclass == C_EXT || isymp->n_sclass == C_HIDEXT)
|
||
{
|
||
BFD_ASSERT (isymp->n_numaux > 0);
|
||
bfd_coff_swap_aux_in (input_bfd,
|
||
(PTR) (esym + isymesz * isymp->n_numaux),
|
||
isymp->n_type, isymp->n_sclass,
|
||
isymp->n_numaux - 1, isymp->n_numaux,
|
||
(PTR) &aux);
|
||
smtyp = SMTYP_SMTYP (aux.x_csect.x_smtyp);
|
||
}
|
||
|
||
/* Make a copy of *isymp so that the relocate_section function
|
||
always sees the original values. This is more reliable than
|
||
always recomputing the symbol value even if we are stripping
|
||
the symbol. */
|
||
isym = *isymp;
|
||
|
||
/* If this symbol is in the .loader section, swap out the
|
||
.loader symbol information. If this is an external symbol
|
||
reference to a defined symbol, though, then wait until we get
|
||
to the definition. */
|
||
if (isym.n_sclass == C_EXT
|
||
&& *sym_hash != NULL
|
||
&& (*sym_hash)->ldsym != NULL
|
||
&& (smtyp != XTY_ER
|
||
|| (*sym_hash)->root.type == bfd_link_hash_undefined))
|
||
{
|
||
struct xcoff_link_hash_entry *h;
|
||
struct internal_ldsym *ldsym;
|
||
|
||
h = *sym_hash;
|
||
ldsym = h->ldsym;
|
||
if (isym.n_scnum > 0)
|
||
{
|
||
ldsym->l_scnum = (*csectpp)->output_section->target_index;
|
||
ldsym->l_value = (isym.n_value
|
||
+ (*csectpp)->output_section->vma
|
||
+ (*csectpp)->output_offset
|
||
- (*csectpp)->vma);
|
||
}
|
||
else
|
||
{
|
||
ldsym->l_scnum = isym.n_scnum;
|
||
ldsym->l_value = isym.n_value;
|
||
}
|
||
|
||
ldsym->l_smtype = smtyp;
|
||
if (((h->flags & XCOFF_DEF_REGULAR) == 0
|
||
&& (h->flags & XCOFF_DEF_DYNAMIC) != 0)
|
||
|| (h->flags & XCOFF_IMPORT) != 0)
|
||
ldsym->l_smtype |= L_IMPORT;
|
||
if (((h->flags & XCOFF_DEF_REGULAR) != 0
|
||
&& (h->flags & XCOFF_DEF_DYNAMIC) != 0)
|
||
|| (h->flags & XCOFF_EXPORT) != 0)
|
||
ldsym->l_smtype |= L_EXPORT;
|
||
if ((h->flags & XCOFF_ENTRY) != 0)
|
||
ldsym->l_smtype |= L_ENTRY;
|
||
|
||
ldsym->l_smclas = aux.x_csect.x_smclas;
|
||
|
||
if (ldsym->l_ifile == (bfd_size_type) -1)
|
||
ldsym->l_ifile = 0;
|
||
else if (ldsym->l_ifile == 0)
|
||
{
|
||
if ((ldsym->l_smtype & L_IMPORT) == 0)
|
||
ldsym->l_ifile = 0;
|
||
else
|
||
{
|
||
bfd *impbfd;
|
||
|
||
if (h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
impbfd = h->root.u.def.section->owner;
|
||
else if (h->root.type == bfd_link_hash_undefined
|
||
|| h->root.type == bfd_link_hash_undefweak)
|
||
impbfd = h->root.u.undef.abfd;
|
||
else
|
||
impbfd = NULL;
|
||
|
||
if (impbfd == NULL)
|
||
ldsym->l_ifile = 0;
|
||
else
|
||
{
|
||
BFD_ASSERT (impbfd->xvec == finfo->output_bfd->xvec);
|
||
ldsym->l_ifile = xcoff_data (impbfd)->import_file_id;
|
||
}
|
||
}
|
||
}
|
||
|
||
ldsym->l_parm = 0;
|
||
|
||
BFD_ASSERT (h->ldindx >= 0);
|
||
BFD_ASSERT (LDSYMSZ == sizeof (struct external_ldsym));
|
||
xcoff_swap_ldsym_out (finfo->output_bfd, ldsym,
|
||
finfo->ldsym + h->ldindx - 3);
|
||
h->ldsym = NULL;
|
||
|
||
/* Fill in snentry now that we know the target_index. */
|
||
if ((h->flags & XCOFF_ENTRY) != 0
|
||
&& (h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak))
|
||
xcoff_data (output_bfd)->snentry =
|
||
h->root.u.def.section->output_section->target_index;
|
||
}
|
||
|
||
*indexp = -1;
|
||
|
||
skip = false;
|
||
require = false;
|
||
add = 1 + isym.n_numaux;
|
||
|
||
/* If we are skipping this csect, we want to skip this symbol. */
|
||
if (*csectpp == NULL)
|
||
skip = true;
|
||
|
||
/* If we garbage collected this csect, we want to skip this
|
||
symbol. */
|
||
if (! skip
|
||
&& xcoff_hash_table (finfo->info)->gc
|
||
&& ((*csectpp)->flags & SEC_MARK) == 0
|
||
&& *csectpp != bfd_abs_section_ptr)
|
||
skip = true;
|
||
|
||
/* An XCOFF linker always skips C_STAT symbols. */
|
||
if (! skip
|
||
&& isymp->n_sclass == C_STAT)
|
||
skip = true;
|
||
|
||
/* We skip all but the first TOC anchor. */
|
||
if (! skip
|
||
&& isymp->n_sclass == C_HIDEXT
|
||
&& aux.x_csect.x_smclas == XMC_TC0)
|
||
{
|
||
if (finfo->toc_symindx != -1)
|
||
skip = true;
|
||
else
|
||
{
|
||
bfd_vma tocval, tocend;
|
||
|
||
tocval = ((*csectpp)->output_section->vma
|
||
+ (*csectpp)->output_offset
|
||
+ isym.n_value
|
||
- (*csectpp)->vma);
|
||
/* We want to find out if tocval is a good value to use
|
||
as the TOC anchor--that is, whether we can access all
|
||
of the TOC using a 16 bit offset from tocval. This
|
||
test assumes that the TOC comes at the end of the
|
||
output section, as it does in the default linker
|
||
script. */
|
||
|
||
tocend = ((*csectpp)->output_section->vma
|
||
+ (*csectpp)->output_section->_raw_size);
|
||
|
||
if (tocval + 0x10000 < tocend)
|
||
{
|
||
(*_bfd_error_handler)
|
||
("TOC overflow: 0x%lx > 0x10000; try -mminimal-toc when compiling",
|
||
(unsigned long) (tocend - tocval));
|
||
bfd_set_error (bfd_error_file_too_big);
|
||
return false;
|
||
}
|
||
|
||
if (tocval + 0x8000 < tocend)
|
||
{
|
||
bfd_vma tocadd;
|
||
|
||
tocadd = tocend - (tocval + 0x8000);
|
||
tocval += tocadd;
|
||
isym.n_value += tocadd;
|
||
}
|
||
|
||
finfo->toc_symindx = output_index;
|
||
xcoff_data (finfo->output_bfd)->toc = tocval;
|
||
xcoff_data (finfo->output_bfd)->sntoc =
|
||
(*csectpp)->output_section->target_index;
|
||
require = true;
|
||
}
|
||
}
|
||
|
||
/* If we are stripping all symbols, we want to skip this one. */
|
||
if (! skip
|
||
&& finfo->info->strip == strip_all)
|
||
skip = true;
|
||
|
||
/* We can skip resolved external references. */
|
||
if (! skip
|
||
&& isym.n_sclass == C_EXT
|
||
&& smtyp == XTY_ER
|
||
&& (*sym_hash)->root.type != bfd_link_hash_undefined)
|
||
skip = true;
|
||
|
||
/* We can skip common symbols if they got defined somewhere
|
||
else. */
|
||
if (! skip
|
||
&& isym.n_sclass == C_EXT
|
||
&& smtyp == XTY_CM
|
||
&& ((*sym_hash)->root.type != bfd_link_hash_common
|
||
|| (*sym_hash)->root.u.c.p->section != *csectpp)
|
||
&& ((*sym_hash)->root.type != bfd_link_hash_defined
|
||
|| (*sym_hash)->root.u.def.section != *csectpp))
|
||
skip = true;
|
||
|
||
/* Skip local symbols if we are discarding them. */
|
||
if (! skip
|
||
&& finfo->info->discard == discard_all
|
||
&& isym.n_sclass != C_EXT
|
||
&& (isym.n_sclass != C_HIDEXT
|
||
|| smtyp != XTY_SD))
|
||
skip = true;
|
||
|
||
/* If we stripping debugging symbols, and this is a debugging
|
||
symbol, then skip it. */
|
||
if (! skip
|
||
&& finfo->info->strip == strip_debugger
|
||
&& isym.n_scnum == N_DEBUG)
|
||
skip = true;
|
||
|
||
/* If some symbols are stripped based on the name, work out the
|
||
name and decide whether to skip this symbol. We don't handle
|
||
this correctly for symbols whose names are in the .debug
|
||
section; to get it right we would need a new bfd_strtab_hash
|
||
function to return the string given the index. */
|
||
if (! skip
|
||
&& (finfo->info->strip == strip_some
|
||
|| finfo->info->discard == discard_l)
|
||
&& (debug_index == NULL || *debug_index == (unsigned long) -1))
|
||
{
|
||
const char *name;
|
||
char buf[SYMNMLEN + 1];
|
||
|
||
name = _bfd_coff_internal_syment_name (input_bfd, &isym, buf);
|
||
if (name == NULL)
|
||
return false;
|
||
|
||
if ((finfo->info->strip == strip_some
|
||
&& (bfd_hash_lookup (finfo->info->keep_hash, name, false,
|
||
false) == NULL))
|
||
|| (finfo->info->discard == discard_l
|
||
&& (isym.n_sclass != C_EXT
|
||
&& (isym.n_sclass != C_HIDEXT
|
||
|| smtyp != XTY_SD))
|
||
&& bfd_is_local_label_name (input_bfd, name)))
|
||
skip = true;
|
||
}
|
||
|
||
/* We can not skip the first TOC anchor. */
|
||
if (skip
|
||
&& require
|
||
&& finfo->info->strip != strip_all)
|
||
skip = false;
|
||
|
||
/* We now know whether we are to skip this symbol or not. */
|
||
if (! skip)
|
||
{
|
||
/* Adjust the symbol in order to output it. */
|
||
|
||
if (isym._n._n_n._n_zeroes == 0
|
||
&& isym._n._n_n._n_offset != 0)
|
||
{
|
||
/* This symbol has a long name. Enter it in the string
|
||
table we are building. If *debug_index != -1, the
|
||
name has already been entered in the .debug section. */
|
||
if (debug_index != NULL && *debug_index != (unsigned long) -1)
|
||
isym._n._n_n._n_offset = *debug_index;
|
||
else
|
||
{
|
||
const char *name;
|
||
bfd_size_type indx;
|
||
|
||
name = _bfd_coff_internal_syment_name (input_bfd, &isym,
|
||
(char *) NULL);
|
||
if (name == NULL)
|
||
return false;
|
||
indx = _bfd_stringtab_add (finfo->strtab, name, hash, copy);
|
||
if (indx == (bfd_size_type) -1)
|
||
return false;
|
||
isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx;
|
||
}
|
||
}
|
||
|
||
if (isym.n_sclass != C_BSTAT
|
||
&& isym.n_sclass != C_ESTAT
|
||
&& isym.n_sclass != C_DECL
|
||
&& isym.n_scnum > 0)
|
||
{
|
||
isym.n_scnum = (*csectpp)->output_section->target_index;
|
||
isym.n_value += ((*csectpp)->output_section->vma
|
||
+ (*csectpp)->output_offset
|
||
- (*csectpp)->vma);
|
||
}
|
||
|
||
/* The value of a C_FILE symbol is the symbol index of the
|
||
next C_FILE symbol. The value of the last C_FILE symbol
|
||
is -1. We try to get this right, below, just before we
|
||
write the symbols out, but in the general case we may
|
||
have to write the symbol out twice. */
|
||
if (isym.n_sclass == C_FILE)
|
||
{
|
||
if (finfo->last_file_index != -1
|
||
&& finfo->last_file.n_value != (long) output_index)
|
||
{
|
||
/* We must correct the value of the last C_FILE entry. */
|
||
finfo->last_file.n_value = output_index;
|
||
if ((bfd_size_type) finfo->last_file_index >= syment_base)
|
||
{
|
||
/* The last C_FILE symbol is in this input file. */
|
||
bfd_coff_swap_sym_out (output_bfd,
|
||
(PTR) &finfo->last_file,
|
||
(PTR) (finfo->outsyms
|
||
+ ((finfo->last_file_index
|
||
- syment_base)
|
||
* osymesz)));
|
||
}
|
||
else
|
||
{
|
||
/* We have already written out the last C_FILE
|
||
symbol. We need to write it out again. We
|
||
borrow *outsym temporarily. */
|
||
bfd_coff_swap_sym_out (output_bfd,
|
||
(PTR) &finfo->last_file,
|
||
(PTR) outsym);
|
||
if (bfd_seek (output_bfd,
|
||
(obj_sym_filepos (output_bfd)
|
||
+ finfo->last_file_index * osymesz),
|
||
SEEK_SET) != 0
|
||
|| (bfd_write (outsym, osymesz, 1, output_bfd)
|
||
!= osymesz))
|
||
return false;
|
||
}
|
||
}
|
||
|
||
finfo->last_file_index = output_index;
|
||
finfo->last_file = isym;
|
||
}
|
||
|
||
/* The value of a C_BINCL or C_EINCL symbol is a file offset
|
||
into the line numbers. We update the symbol values when
|
||
we handle the line numbers. */
|
||
if (isym.n_sclass == C_BINCL
|
||
|| isym.n_sclass == C_EINCL)
|
||
{
|
||
isym.n_value = finfo->line_filepos;
|
||
++incls;
|
||
}
|
||
|
||
/* Output the symbol. */
|
||
|
||
bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym);
|
||
|
||
*indexp = output_index;
|
||
|
||
if (isym.n_sclass == C_EXT)
|
||
{
|
||
long indx;
|
||
struct xcoff_link_hash_entry *h;
|
||
|
||
indx = ((esym - (bfd_byte *) obj_coff_external_syms (input_bfd))
|
||
/ isymesz);
|
||
h = obj_xcoff_sym_hashes (input_bfd)[indx];
|
||
BFD_ASSERT (h != NULL);
|
||
h->indx = output_index;
|
||
}
|
||
|
||
/* If this is a symbol in the TOC which we may have merged
|
||
(class XMC_TC), remember the symbol index of the TOC
|
||
symbol. */
|
||
if (isym.n_sclass == C_HIDEXT
|
||
&& aux.x_csect.x_smclas == XMC_TC
|
||
&& *sym_hash != NULL)
|
||
{
|
||
BFD_ASSERT (((*sym_hash)->flags & XCOFF_SET_TOC) == 0);
|
||
BFD_ASSERT ((*sym_hash)->toc_section != NULL);
|
||
(*sym_hash)->u.toc_indx = output_index;
|
||
}
|
||
|
||
output_index += add;
|
||
outsym += add * osymesz;
|
||
}
|
||
|
||
esym += add * isymesz;
|
||
isymp += add;
|
||
csectpp += add;
|
||
sym_hash += add;
|
||
if (debug_index != NULL)
|
||
debug_index += add;
|
||
++indexp;
|
||
for (--add; add > 0; --add)
|
||
*indexp++ = -1;
|
||
}
|
||
|
||
/* Fix up the aux entries and the C_BSTAT symbols. This must be
|
||
done in a separate pass, because we don't know the correct symbol
|
||
indices until we have already decided which symbols we are going
|
||
to keep. */
|
||
|
||
esym = (bfd_byte *) obj_coff_external_syms (input_bfd);
|
||
esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz;
|
||
isymp = finfo->internal_syms;
|
||
indexp = finfo->sym_indices;
|
||
csectpp = xcoff_data (input_bfd)->csects;
|
||
outsym = finfo->outsyms;
|
||
while (esym < esym_end)
|
||
{
|
||
int add;
|
||
|
||
add = 1 + isymp->n_numaux;
|
||
|
||
if (*indexp < 0)
|
||
esym += add * isymesz;
|
||
else
|
||
{
|
||
int i;
|
||
|
||
if (isymp->n_sclass == C_BSTAT)
|
||
{
|
||
struct internal_syment isym;
|
||
unsigned long indx;
|
||
|
||
/* The value of a C_BSTAT symbol is the symbol table
|
||
index of the containing csect. */
|
||
bfd_coff_swap_sym_in (output_bfd, (PTR) outsym, (PTR) &isym);
|
||
indx = isym.n_value;
|
||
if (indx < obj_raw_syment_count (input_bfd))
|
||
{
|
||
long symindx;
|
||
|
||
symindx = finfo->sym_indices[indx];
|
||
if (symindx < 0)
|
||
isym.n_value = 0;
|
||
else
|
||
isym.n_value = symindx;
|
||
bfd_coff_swap_sym_out (output_bfd, (PTR) &isym,
|
||
(PTR) outsym);
|
||
}
|
||
}
|
||
|
||
esym += isymesz;
|
||
outsym += osymesz;
|
||
|
||
for (i = 0; i < isymp->n_numaux && esym < esym_end; i++)
|
||
{
|
||
union internal_auxent aux;
|
||
|
||
bfd_coff_swap_aux_in (input_bfd, (PTR) esym, isymp->n_type,
|
||
isymp->n_sclass, i, isymp->n_numaux,
|
||
(PTR) &aux);
|
||
|
||
if (isymp->n_sclass == C_FILE)
|
||
{
|
||
/* This is the file name (or some comment put in by
|
||
the compiler). If it is long, we must put it in
|
||
the string table. */
|
||
if (aux.x_file.x_n.x_zeroes == 0
|
||
&& aux.x_file.x_n.x_offset != 0)
|
||
{
|
||
const char *filename;
|
||
bfd_size_type indx;
|
||
|
||
BFD_ASSERT (aux.x_file.x_n.x_offset
|
||
>= STRING_SIZE_SIZE);
|
||
if (strings == NULL)
|
||
{
|
||
strings = _bfd_coff_read_string_table (input_bfd);
|
||
if (strings == NULL)
|
||
return false;
|
||
}
|
||
filename = strings + aux.x_file.x_n.x_offset;
|
||
indx = _bfd_stringtab_add (finfo->strtab, filename,
|
||
hash, copy);
|
||
if (indx == (bfd_size_type) -1)
|
||
return false;
|
||
aux.x_file.x_n.x_offset = STRING_SIZE_SIZE + indx;
|
||
}
|
||
}
|
||
else if ((isymp->n_sclass == C_EXT
|
||
|| isymp->n_sclass == C_HIDEXT)
|
||
&& i + 1 == isymp->n_numaux)
|
||
{
|
||
/* We don't support type checking. I don't know if
|
||
anybody does. */
|
||
aux.x_csect.x_parmhash = 0;
|
||
/* I don't think anybody uses these fields, but we'd
|
||
better clobber them just in case. */
|
||
aux.x_csect.x_stab = 0;
|
||
aux.x_csect.x_snstab = 0;
|
||
if (SMTYP_SMTYP (aux.x_csect.x_smtyp) == XTY_LD)
|
||
{
|
||
unsigned long indx;
|
||
|
||
indx = aux.x_csect.x_scnlen.l;
|
||
if (indx < obj_raw_syment_count (input_bfd))
|
||
{
|
||
long symindx;
|
||
|
||
symindx = finfo->sym_indices[indx];
|
||
if (symindx < 0)
|
||
aux.x_sym.x_tagndx.l = 0;
|
||
else
|
||
aux.x_sym.x_tagndx.l = symindx;
|
||
}
|
||
}
|
||
}
|
||
else if (isymp->n_sclass != C_STAT || isymp->n_type != T_NULL)
|
||
{
|
||
unsigned long indx;
|
||
|
||
if (ISFCN (isymp->n_type)
|
||
|| ISTAG (isymp->n_sclass)
|
||
|| isymp->n_sclass == C_BLOCK
|
||
|| isymp->n_sclass == C_FCN)
|
||
{
|
||
indx = aux.x_sym.x_fcnary.x_fcn.x_endndx.l;
|
||
if (indx > 0
|
||
&& indx < obj_raw_syment_count (input_bfd))
|
||
{
|
||
/* We look forward through the symbol for
|
||
the index of the next symbol we are going
|
||
to include. I don't know if this is
|
||
entirely right. */
|
||
while (finfo->sym_indices[indx] < 0
|
||
&& indx < obj_raw_syment_count (input_bfd))
|
||
++indx;
|
||
if (indx >= obj_raw_syment_count (input_bfd))
|
||
indx = output_index;
|
||
else
|
||
indx = finfo->sym_indices[indx];
|
||
aux.x_sym.x_fcnary.x_fcn.x_endndx.l = indx;
|
||
}
|
||
}
|
||
|
||
indx = aux.x_sym.x_tagndx.l;
|
||
if (indx > 0 && indx < obj_raw_syment_count (input_bfd))
|
||
{
|
||
long symindx;
|
||
|
||
symindx = finfo->sym_indices[indx];
|
||
if (symindx < 0)
|
||
aux.x_sym.x_tagndx.l = 0;
|
||
else
|
||
aux.x_sym.x_tagndx.l = symindx;
|
||
}
|
||
}
|
||
|
||
/* Copy over the line numbers, unless we are stripping
|
||
them. We do this on a symbol by symbol basis in
|
||
order to more easily handle garbage collection. */
|
||
if ((isymp->n_sclass == C_EXT
|
||
|| isymp->n_sclass == C_HIDEXT)
|
||
&& i == 0
|
||
&& isymp->n_numaux > 1
|
||
&& ISFCN (isymp->n_type)
|
||
&& aux.x_sym.x_fcnary.x_fcn.x_lnnoptr != 0)
|
||
{
|
||
if (finfo->info->strip != strip_none
|
||
&& finfo->info->strip != strip_some)
|
||
aux.x_sym.x_fcnary.x_fcn.x_lnnoptr = 0;
|
||
else
|
||
{
|
||
asection *enclosing;
|
||
unsigned int enc_count;
|
||
bfd_size_type linoff;
|
||
struct internal_lineno lin;
|
||
|
||
o = *csectpp;
|
||
enclosing = xcoff_section_data (abfd, o)->enclosing;
|
||
enc_count = xcoff_section_data (abfd, o)->lineno_count;
|
||
if (oline != enclosing)
|
||
{
|
||
if (bfd_seek (input_bfd,
|
||
enclosing->line_filepos,
|
||
SEEK_SET) != 0
|
||
|| (bfd_read (finfo->linenos, linesz,
|
||
enc_count, input_bfd)
|
||
!= linesz * enc_count))
|
||
return false;
|
||
oline = enclosing;
|
||
}
|
||
|
||
linoff = (aux.x_sym.x_fcnary.x_fcn.x_lnnoptr
|
||
- enclosing->line_filepos);
|
||
|
||
bfd_coff_swap_lineno_in (input_bfd,
|
||
(PTR) (finfo->linenos + linoff),
|
||
(PTR) &lin);
|
||
if (lin.l_lnno != 0
|
||
|| ((bfd_size_type) lin.l_addr.l_symndx
|
||
!= ((esym
|
||
- isymesz
|
||
- ((bfd_byte *)
|
||
obj_coff_external_syms (input_bfd)))
|
||
/ isymesz)))
|
||
aux.x_sym.x_fcnary.x_fcn.x_lnnoptr = 0;
|
||
else
|
||
{
|
||
bfd_byte *linpend, *linp;
|
||
bfd_vma offset;
|
||
bfd_size_type count;
|
||
|
||
lin.l_addr.l_symndx = *indexp;
|
||
bfd_coff_swap_lineno_out (output_bfd, (PTR) &lin,
|
||
(PTR) (finfo->linenos
|
||
+ linoff));
|
||
|
||
linpend = (finfo->linenos
|
||
+ enc_count * linesz);
|
||
offset = (o->output_section->vma
|
||
+ o->output_offset
|
||
- o->vma);
|
||
for (linp = finfo->linenos + linoff + linesz;
|
||
linp < linpend;
|
||
linp += linesz)
|
||
{
|
||
bfd_coff_swap_lineno_in (input_bfd, (PTR) linp,
|
||
(PTR) &lin);
|
||
if (lin.l_lnno == 0)
|
||
break;
|
||
lin.l_addr.l_paddr += offset;
|
||
bfd_coff_swap_lineno_out (output_bfd,
|
||
(PTR) &lin,
|
||
(PTR) linp);
|
||
}
|
||
|
||
count = (linp - (finfo->linenos + linoff)) / linesz;
|
||
|
||
aux.x_sym.x_fcnary.x_fcn.x_lnnoptr =
|
||
(o->output_section->line_filepos
|
||
+ o->output_section->lineno_count * linesz);
|
||
|
||
if (bfd_seek (output_bfd,
|
||
aux.x_sym.x_fcnary.x_fcn.x_lnnoptr,
|
||
SEEK_SET) != 0
|
||
|| (bfd_write (finfo->linenos + linoff,
|
||
linesz, count, output_bfd)
|
||
!= linesz * count))
|
||
return false;
|
||
|
||
o->output_section->lineno_count += count;
|
||
|
||
if (incls > 0)
|
||
{
|
||
struct internal_syment *iisp, *iispend;
|
||
long *iindp;
|
||
bfd_byte *oos;
|
||
int iiadd;
|
||
|
||
/* Update any C_BINCL or C_EINCL symbols
|
||
that refer to a line number in the
|
||
range we just output. */
|
||
iisp = finfo->internal_syms;
|
||
iispend = (iisp
|
||
+ obj_raw_syment_count (input_bfd));
|
||
iindp = finfo->sym_indices;
|
||
oos = finfo->outsyms;
|
||
while (iisp < iispend)
|
||
{
|
||
if (*iindp >= 0
|
||
&& (iisp->n_sclass == C_BINCL
|
||
|| iisp->n_sclass == C_EINCL)
|
||
&& ((bfd_size_type) iisp->n_value
|
||
>= enclosing->line_filepos + linoff)
|
||
&& ((bfd_size_type) iisp->n_value
|
||
< (enclosing->line_filepos
|
||
+ enc_count * linesz)))
|
||
{
|
||
struct internal_syment iis;
|
||
|
||
bfd_coff_swap_sym_in (output_bfd,
|
||
(PTR) oos,
|
||
(PTR) &iis);
|
||
iis.n_value =
|
||
(iisp->n_value
|
||
- enclosing->line_filepos
|
||
- linoff
|
||
+ aux.x_sym.x_fcnary.x_fcn.x_lnnoptr);
|
||
bfd_coff_swap_sym_out (output_bfd,
|
||
(PTR) &iis,
|
||
(PTR) oos);
|
||
--incls;
|
||
}
|
||
|
||
iiadd = 1 + iisp->n_numaux;
|
||
if (*iindp >= 0)
|
||
oos += iiadd * osymesz;
|
||
iisp += iiadd;
|
||
iindp += iiadd;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, isymp->n_type,
|
||
isymp->n_sclass, i, isymp->n_numaux,
|
||
(PTR) outsym);
|
||
outsym += osymesz;
|
||
esym += isymesz;
|
||
}
|
||
}
|
||
|
||
indexp += add;
|
||
isymp += add;
|
||
csectpp += add;
|
||
}
|
||
|
||
/* If we swapped out a C_FILE symbol, guess that the next C_FILE
|
||
symbol will be the first symbol in the next input file. In the
|
||
normal case, this will save us from writing out the C_FILE symbol
|
||
again. */
|
||
if (finfo->last_file_index != -1
|
||
&& (bfd_size_type) finfo->last_file_index >= syment_base)
|
||
{
|
||
finfo->last_file.n_value = output_index;
|
||
bfd_coff_swap_sym_out (output_bfd, (PTR) &finfo->last_file,
|
||
(PTR) (finfo->outsyms
|
||
+ ((finfo->last_file_index - syment_base)
|
||
* osymesz)));
|
||
}
|
||
|
||
/* Write the modified symbols to the output file. */
|
||
if (outsym > finfo->outsyms)
|
||
{
|
||
if (bfd_seek (output_bfd,
|
||
obj_sym_filepos (output_bfd) + syment_base * osymesz,
|
||
SEEK_SET) != 0
|
||
|| (bfd_write (finfo->outsyms, outsym - finfo->outsyms, 1,
|
||
output_bfd)
|
||
!= (bfd_size_type) (outsym - finfo->outsyms)))
|
||
return false;
|
||
|
||
BFD_ASSERT ((obj_raw_syment_count (output_bfd)
|
||
+ (outsym - finfo->outsyms) / osymesz)
|
||
== output_index);
|
||
|
||
obj_raw_syment_count (output_bfd) = output_index;
|
||
}
|
||
|
||
/* Don't let the linker relocation routines discard the symbols. */
|
||
keep_syms = obj_coff_keep_syms (input_bfd);
|
||
obj_coff_keep_syms (input_bfd) = true;
|
||
|
||
/* Relocate the contents of each section. */
|
||
for (o = input_bfd->sections; o != NULL; o = o->next)
|
||
{
|
||
bfd_byte *contents;
|
||
|
||
if (! o->linker_mark)
|
||
{
|
||
/* This section was omitted from the link. */
|
||
continue;
|
||
}
|
||
|
||
if ((o->flags & SEC_HAS_CONTENTS) == 0
|
||
|| o->_raw_size == 0
|
||
|| (o->flags & SEC_IN_MEMORY) != 0)
|
||
continue;
|
||
|
||
/* We have set filepos correctly for the sections we created to
|
||
represent csects, so bfd_get_section_contents should work. */
|
||
if (coff_section_data (input_bfd, o) != NULL
|
||
&& coff_section_data (input_bfd, o)->contents != NULL)
|
||
contents = coff_section_data (input_bfd, o)->contents;
|
||
else
|
||
{
|
||
if (! bfd_get_section_contents (input_bfd, o, finfo->contents,
|
||
(file_ptr) 0, o->_raw_size))
|
||
return false;
|
||
contents = finfo->contents;
|
||
}
|
||
|
||
if ((o->flags & SEC_RELOC) != 0)
|
||
{
|
||
int target_index;
|
||
struct internal_reloc *internal_relocs;
|
||
struct internal_reloc *irel;
|
||
bfd_vma offset;
|
||
struct internal_reloc *irelend;
|
||
struct xcoff_link_hash_entry **rel_hash;
|
||
long r_symndx;
|
||
|
||
/* Read in the relocs. */
|
||
target_index = o->output_section->target_index;
|
||
internal_relocs = (xcoff_read_internal_relocs
|
||
(input_bfd, o, false, finfo->external_relocs,
|
||
true,
|
||
(finfo->section_info[target_index].relocs
|
||
+ o->output_section->reloc_count)));
|
||
if (internal_relocs == NULL)
|
||
return false;
|
||
|
||
/* Call processor specific code to relocate the section
|
||
contents. */
|
||
if (! bfd_coff_relocate_section (output_bfd, finfo->info,
|
||
input_bfd, o,
|
||
contents,
|
||
internal_relocs,
|
||
finfo->internal_syms,
|
||
xcoff_data (input_bfd)->csects))
|
||
return false;
|
||
|
||
offset = o->output_section->vma + o->output_offset - o->vma;
|
||
irel = internal_relocs;
|
||
irelend = irel + o->reloc_count;
|
||
rel_hash = (finfo->section_info[target_index].rel_hashes
|
||
+ o->output_section->reloc_count);
|
||
for (; irel < irelend; irel++, rel_hash++)
|
||
{
|
||
struct xcoff_link_hash_entry *h = NULL;
|
||
struct internal_ldrel ldrel;
|
||
boolean quiet;
|
||
|
||
*rel_hash = NULL;
|
||
|
||
/* Adjust the reloc address and symbol index. */
|
||
|
||
irel->r_vaddr += offset;
|
||
|
||
r_symndx = irel->r_symndx;
|
||
|
||
if (r_symndx != -1)
|
||
{
|
||
h = obj_xcoff_sym_hashes (input_bfd)[r_symndx];
|
||
if (h != NULL
|
||
&& h->smclas != XMC_TD
|
||
&& (irel->r_type == R_TOC
|
||
|| irel->r_type == R_GL
|
||
|| irel->r_type == R_TCL
|
||
|| irel->r_type == R_TRL
|
||
|| irel->r_type == R_TRLA))
|
||
{
|
||
/* This is a TOC relative reloc with a symbol
|
||
attached. The symbol should be the one which
|
||
this reloc is for. We want to make this
|
||
reloc against the TOC address of the symbol,
|
||
not the symbol itself. */
|
||
BFD_ASSERT (h->toc_section != NULL);
|
||
BFD_ASSERT ((h->flags & XCOFF_SET_TOC) == 0);
|
||
if (h->u.toc_indx != -1)
|
||
irel->r_symndx = h->u.toc_indx;
|
||
else
|
||
{
|
||
struct xcoff_toc_rel_hash *n;
|
||
struct xcoff_link_section_info *si;
|
||
|
||
n = ((struct xcoff_toc_rel_hash *)
|
||
bfd_alloc (finfo->output_bfd,
|
||
sizeof (struct xcoff_toc_rel_hash)));
|
||
if (n == NULL)
|
||
return false;
|
||
si = finfo->section_info + target_index;
|
||
n->next = si->toc_rel_hashes;
|
||
n->h = h;
|
||
n->rel = irel;
|
||
si->toc_rel_hashes = n;
|
||
}
|
||
}
|
||
else if (h != NULL)
|
||
{
|
||
/* This is a global symbol. */
|
||
if (h->indx >= 0)
|
||
irel->r_symndx = h->indx;
|
||
else
|
||
{
|
||
/* This symbol is being written at the end
|
||
of the file, and we do not yet know the
|
||
symbol index. We save the pointer to the
|
||
hash table entry in the rel_hash list.
|
||
We set the indx field to -2 to indicate
|
||
that this symbol must not be stripped. */
|
||
*rel_hash = h;
|
||
h->indx = -2;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
long indx;
|
||
|
||
indx = finfo->sym_indices[r_symndx];
|
||
|
||
if (indx == -1)
|
||
{
|
||
struct internal_syment *is;
|
||
|
||
/* Relocations against a TC0 TOC anchor are
|
||
automatically transformed to be against
|
||
the TOC anchor in the output file. */
|
||
is = finfo->internal_syms + r_symndx;
|
||
if (is->n_sclass == C_HIDEXT
|
||
&& is->n_numaux > 0)
|
||
{
|
||
PTR auxptr;
|
||
union internal_auxent aux;
|
||
|
||
auxptr = ((PTR)
|
||
(((bfd_byte *)
|
||
obj_coff_external_syms (input_bfd))
|
||
+ ((r_symndx + is->n_numaux)
|
||
* isymesz)));
|
||
bfd_coff_swap_aux_in (input_bfd, auxptr,
|
||
is->n_type, is->n_sclass,
|
||
is->n_numaux - 1,
|
||
is->n_numaux,
|
||
(PTR) &aux);
|
||
if (SMTYP_SMTYP (aux.x_csect.x_smtyp) == XTY_SD
|
||
&& aux.x_csect.x_smclas == XMC_TC0)
|
||
indx = finfo->toc_symindx;
|
||
}
|
||
}
|
||
|
||
if (indx != -1)
|
||
irel->r_symndx = indx;
|
||
else
|
||
{
|
||
struct internal_syment *is;
|
||
const char *name;
|
||
char buf[SYMNMLEN + 1];
|
||
|
||
/* This reloc is against a symbol we are
|
||
stripping. It would be possible to handle
|
||
this case, but I don't think it's worth it. */
|
||
is = finfo->internal_syms + r_symndx;
|
||
|
||
name = (_bfd_coff_internal_syment_name
|
||
(input_bfd, is, buf));
|
||
if (name == NULL)
|
||
return false;
|
||
|
||
if (! ((*finfo->info->callbacks->unattached_reloc)
|
||
(finfo->info, name, input_bfd, o,
|
||
irel->r_vaddr)))
|
||
return false;
|
||
}
|
||
}
|
||
}
|
||
|
||
quiet = false;
|
||
switch (irel->r_type)
|
||
{
|
||
default:
|
||
if (h == NULL
|
||
|| h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak
|
||
|| h->root.type == bfd_link_hash_common)
|
||
break;
|
||
/* Fall through. */
|
||
case R_POS:
|
||
case R_NEG:
|
||
case R_RL:
|
||
case R_RLA:
|
||
/* This reloc needs to be copied into the .loader
|
||
section. */
|
||
ldrel.l_vaddr = irel->r_vaddr;
|
||
if (r_symndx == -1)
|
||
ldrel.l_symndx = -1;
|
||
else if (h == NULL
|
||
|| (h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak
|
||
|| h->root.type == bfd_link_hash_common))
|
||
{
|
||
asection *sec;
|
||
|
||
if (h == NULL)
|
||
sec = xcoff_data (input_bfd)->csects[r_symndx];
|
||
else if (h->root.type == bfd_link_hash_common)
|
||
sec = h->root.u.c.p->section;
|
||
else
|
||
sec = h->root.u.def.section;
|
||
sec = sec->output_section;
|
||
|
||
if (strcmp (sec->name, ".text") == 0)
|
||
ldrel.l_symndx = 0;
|
||
else if (strcmp (sec->name, ".data") == 0)
|
||
ldrel.l_symndx = 1;
|
||
else if (strcmp (sec->name, ".bss") == 0)
|
||
ldrel.l_symndx = 2;
|
||
else
|
||
{
|
||
(*_bfd_error_handler)
|
||
("%s: loader reloc in unrecognized section `%s'",
|
||
bfd_get_filename (input_bfd),
|
||
sec->name);
|
||
bfd_set_error (bfd_error_nonrepresentable_section);
|
||
return false;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (! finfo->info->relocateable
|
||
&& (h->flags & XCOFF_DEF_DYNAMIC) == 0
|
||
&& (h->flags & XCOFF_IMPORT) == 0)
|
||
{
|
||
/* We already called the undefined_symbol
|
||
callback for this relocation, in
|
||
_bfd_ppc_xcoff_relocate_section. Don't
|
||
issue any more warnings. */
|
||
quiet = true;
|
||
}
|
||
if (h->ldindx < 0 && ! quiet)
|
||
{
|
||
(*_bfd_error_handler)
|
||
("%s: `%s' in loader reloc but not loader sym",
|
||
bfd_get_filename (input_bfd),
|
||
h->root.root.string);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
ldrel.l_symndx = h->ldindx;
|
||
}
|
||
ldrel.l_rtype = (irel->r_size << 8) | irel->r_type;
|
||
ldrel.l_rsecnm = o->output_section->target_index;
|
||
if (xcoff_hash_table (finfo->info)->textro
|
||
&& strcmp (o->output_section->name, ".text") == 0
|
||
&& ! quiet)
|
||
{
|
||
(*_bfd_error_handler)
|
||
("%s: loader reloc in read-only section %s",
|
||
bfd_get_filename (input_bfd),
|
||
bfd_get_section_name (finfo->output_bfd,
|
||
o->output_section));
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
return false;
|
||
}
|
||
xcoff_swap_ldrel_out (output_bfd, &ldrel,
|
||
finfo->ldrel);
|
||
BFD_ASSERT (sizeof (struct external_ldrel) == LDRELSZ);
|
||
++finfo->ldrel;
|
||
break;
|
||
|
||
case R_TOC:
|
||
case R_GL:
|
||
case R_TCL:
|
||
case R_TRL:
|
||
case R_TRLA:
|
||
/* We should never need a .loader reloc for a TOC
|
||
relative reloc. */
|
||
break;
|
||
}
|
||
}
|
||
|
||
o->output_section->reloc_count += o->reloc_count;
|
||
}
|
||
|
||
/* Write out the modified section contents. */
|
||
if (! bfd_set_section_contents (output_bfd, o->output_section,
|
||
contents, o->output_offset,
|
||
(o->_cooked_size != 0
|
||
? o->_cooked_size
|
||
: o->_raw_size)))
|
||
return false;
|
||
}
|
||
|
||
obj_coff_keep_syms (input_bfd) = keep_syms;
|
||
|
||
if (! finfo->info->keep_memory)
|
||
{
|
||
if (! _bfd_coff_free_symbols (input_bfd))
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
#undef N_TMASK
|
||
#undef N_BTSHFT
|
||
|
||
/* Write out a non-XCOFF global symbol. */
|
||
|
||
static boolean
|
||
xcoff_write_global_symbol (h, p)
|
||
struct xcoff_link_hash_entry *h;
|
||
PTR p;
|
||
{
|
||
struct xcoff_final_link_info *finfo = (struct xcoff_final_link_info *) p;
|
||
bfd *output_bfd;
|
||
bfd_byte *outsym;
|
||
struct internal_syment isym;
|
||
union internal_auxent aux;
|
||
|
||
output_bfd = finfo->output_bfd;
|
||
outsym = finfo->outsyms;
|
||
|
||
/* If this symbol was garbage collected, just skip it. */
|
||
if (xcoff_hash_table (finfo->info)->gc
|
||
&& (h->flags & XCOFF_MARK) == 0)
|
||
return true;
|
||
|
||
/* If we need a .loader section entry, write it out. */
|
||
if (h->ldsym != NULL)
|
||
{
|
||
struct internal_ldsym *ldsym;
|
||
bfd *impbfd;
|
||
|
||
ldsym = h->ldsym;
|
||
|
||
if (h->root.type == bfd_link_hash_undefined
|
||
|| h->root.type == bfd_link_hash_undefweak)
|
||
{
|
||
ldsym->l_value = 0;
|
||
ldsym->l_scnum = N_UNDEF;
|
||
ldsym->l_smtype = XTY_ER;
|
||
impbfd = h->root.u.undef.abfd;
|
||
}
|
||
else if (h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
{
|
||
asection *sec;
|
||
|
||
sec = h->root.u.def.section;
|
||
ldsym->l_value = (sec->output_section->vma
|
||
+ sec->output_offset
|
||
+ h->root.u.def.value);
|
||
ldsym->l_scnum = sec->output_section->target_index;
|
||
ldsym->l_smtype = XTY_SD;
|
||
impbfd = sec->owner;
|
||
}
|
||
else
|
||
abort ();
|
||
|
||
if (((h->flags & XCOFF_DEF_REGULAR) == 0
|
||
&& (h->flags & XCOFF_DEF_DYNAMIC) != 0)
|
||
|| (h->flags & XCOFF_IMPORT) != 0)
|
||
ldsym->l_smtype |= L_IMPORT;
|
||
if (((h->flags & XCOFF_DEF_REGULAR) != 0
|
||
&& (h->flags & XCOFF_DEF_DYNAMIC) != 0)
|
||
|| (h->flags & XCOFF_EXPORT) != 0)
|
||
ldsym->l_smtype |= L_EXPORT;
|
||
if ((h->flags & XCOFF_ENTRY) != 0)
|
||
ldsym->l_smtype |= L_ENTRY;
|
||
|
||
ldsym->l_smclas = h->smclas;
|
||
|
||
if (ldsym->l_ifile == (bfd_size_type) -1)
|
||
ldsym->l_ifile = 0;
|
||
else if (ldsym->l_ifile == 0)
|
||
{
|
||
if ((ldsym->l_smtype & L_IMPORT) == 0)
|
||
ldsym->l_ifile = 0;
|
||
else if (impbfd == NULL)
|
||
ldsym->l_ifile = 0;
|
||
else
|
||
{
|
||
BFD_ASSERT (impbfd->xvec == output_bfd->xvec);
|
||
ldsym->l_ifile = xcoff_data (impbfd)->import_file_id;
|
||
}
|
||
}
|
||
|
||
ldsym->l_parm = 0;
|
||
|
||
BFD_ASSERT (h->ldindx >= 0);
|
||
BFD_ASSERT (LDSYMSZ == sizeof (struct external_ldsym));
|
||
xcoff_swap_ldsym_out (output_bfd, ldsym, finfo->ldsym + h->ldindx - 3);
|
||
h->ldsym = NULL;
|
||
}
|
||
|
||
/* If this symbol needs global linkage code, write it out. */
|
||
if (h->root.type == bfd_link_hash_defined
|
||
&& (h->root.u.def.section
|
||
== xcoff_hash_table (finfo->info)->linkage_section))
|
||
{
|
||
bfd_byte *p;
|
||
bfd_vma tocoff;
|
||
unsigned int i;
|
||
|
||
p = h->root.u.def.section->contents + h->root.u.def.value;
|
||
|
||
/* The first instruction in the global linkage code loads a
|
||
specific TOC element. */
|
||
tocoff = (h->descriptor->toc_section->output_section->vma
|
||
+ h->descriptor->toc_section->output_offset
|
||
- xcoff_data (output_bfd)->toc);
|
||
if ((h->descriptor->flags & XCOFF_SET_TOC) != 0)
|
||
tocoff += h->descriptor->u.toc_offset;
|
||
bfd_put_32 (output_bfd, XCOFF_GLINK_FIRST | (tocoff & 0xffff), p);
|
||
for (i = 0, p += 4;
|
||
i < sizeof xcoff_glink_code / sizeof xcoff_glink_code[0];
|
||
i++, p += 4)
|
||
bfd_put_32 (output_bfd, xcoff_glink_code[i], p);
|
||
}
|
||
|
||
/* If we created a TOC entry for this symbol, write out the required
|
||
relocs. */
|
||
if ((h->flags & XCOFF_SET_TOC) != 0)
|
||
{
|
||
asection *tocsec;
|
||
asection *osec;
|
||
int oindx;
|
||
struct internal_reloc *irel;
|
||
struct internal_ldrel ldrel;
|
||
struct internal_syment irsym;
|
||
union internal_auxent iraux;
|
||
|
||
tocsec = h->toc_section;
|
||
osec = tocsec->output_section;
|
||
oindx = osec->target_index;
|
||
irel = finfo->section_info[oindx].relocs + osec->reloc_count;
|
||
irel->r_vaddr = (osec->vma
|
||
+ tocsec->output_offset
|
||
+ h->u.toc_offset);
|
||
if (h->indx >= 0)
|
||
irel->r_symndx = h->indx;
|
||
else
|
||
{
|
||
h->indx = -2;
|
||
irel->r_symndx = obj_raw_syment_count (output_bfd);
|
||
}
|
||
irel->r_type = R_POS;
|
||
irel->r_size = 31;
|
||
finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL;
|
||
++osec->reloc_count;
|
||
|
||
BFD_ASSERT (h->ldindx >= 0);
|
||
ldrel.l_vaddr = irel->r_vaddr;
|
||
ldrel.l_symndx = h->ldindx;
|
||
ldrel.l_rtype = (31 << 8) | R_POS;
|
||
ldrel.l_rsecnm = oindx;
|
||
xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel);
|
||
++finfo->ldrel;
|
||
|
||
/* We need to emit a symbol to define a csect which holds the
|
||
reloc. */
|
||
if (strlen (h->root.root.string) <= SYMNMLEN)
|
||
strncpy (irsym._n._n_name, h->root.root.string, SYMNMLEN);
|
||
else
|
||
{
|
||
boolean hash;
|
||
bfd_size_type indx;
|
||
|
||
hash = true;
|
||
if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
|
||
hash = false;
|
||
indx = _bfd_stringtab_add (finfo->strtab, h->root.root.string, hash,
|
||
false);
|
||
if (indx == (bfd_size_type) -1)
|
||
return false;
|
||
irsym._n._n_n._n_zeroes = 0;
|
||
irsym._n._n_n._n_offset = STRING_SIZE_SIZE + indx;
|
||
}
|
||
|
||
irsym.n_value = irel->r_vaddr;
|
||
irsym.n_scnum = osec->target_index;
|
||
irsym.n_sclass = C_HIDEXT;
|
||
irsym.n_type = T_NULL;
|
||
irsym.n_numaux = 1;
|
||
|
||
bfd_coff_swap_sym_out (output_bfd, (PTR) &irsym, (PTR) outsym);
|
||
outsym += bfd_coff_symesz (output_bfd);
|
||
|
||
memset (&iraux, 0, sizeof iraux);
|
||
iraux.x_csect.x_smtyp = XTY_SD;
|
||
iraux.x_csect.x_scnlen.l = 4;
|
||
iraux.x_csect.x_smclas = XMC_TC;
|
||
|
||
bfd_coff_swap_aux_out (output_bfd, (PTR) &iraux, T_NULL, C_HIDEXT, 0, 1,
|
||
(PTR) outsym);
|
||
outsym += bfd_coff_auxesz (output_bfd);
|
||
|
||
if (h->indx >= 0)
|
||
{
|
||
/* We aren't going to write out the symbols below, so we
|
||
need to write them out now. */
|
||
if (bfd_seek (output_bfd,
|
||
(obj_sym_filepos (output_bfd)
|
||
+ (obj_raw_syment_count (output_bfd)
|
||
* bfd_coff_symesz (output_bfd))),
|
||
SEEK_SET) != 0
|
||
|| (bfd_write (finfo->outsyms, outsym - finfo->outsyms, 1,
|
||
output_bfd)
|
||
!= (bfd_size_type) (outsym - finfo->outsyms)))
|
||
return false;
|
||
obj_raw_syment_count (output_bfd) +=
|
||
(outsym - finfo->outsyms) / bfd_coff_symesz (output_bfd);
|
||
|
||
outsym = finfo->outsyms;
|
||
}
|
||
}
|
||
|
||
/* If this symbol is a specially defined function descriptor, write
|
||
it out. The first word is the address of the function code
|
||
itself, the second word is the address of the TOC, and the third
|
||
word is zero. */
|
||
if ((h->flags & XCOFF_DESCRIPTOR) != 0
|
||
&& h->root.type == bfd_link_hash_defined
|
||
&& (h->root.u.def.section
|
||
== xcoff_hash_table (finfo->info)->descriptor_section))
|
||
{
|
||
asection *sec;
|
||
asection *osec;
|
||
int oindx;
|
||
bfd_byte *p;
|
||
struct xcoff_link_hash_entry *hentry;
|
||
asection *esec;
|
||
struct internal_reloc *irel;
|
||
struct internal_ldrel ldrel;
|
||
asection *tsec;
|
||
|
||
sec = h->root.u.def.section;
|
||
osec = sec->output_section;
|
||
oindx = osec->target_index;
|
||
p = sec->contents + h->root.u.def.value;
|
||
|
||
hentry = h->descriptor;
|
||
BFD_ASSERT (hentry != NULL
|
||
&& (hentry->root.type == bfd_link_hash_defined
|
||
|| hentry->root.type == bfd_link_hash_defweak));
|
||
esec = hentry->root.u.def.section;
|
||
bfd_put_32 (output_bfd,
|
||
(esec->output_section->vma
|
||
+ esec->output_offset
|
||
+ hentry->root.u.def.value),
|
||
p);
|
||
|
||
irel = finfo->section_info[oindx].relocs + osec->reloc_count;
|
||
irel->r_vaddr = (osec->vma
|
||
+ sec->output_offset
|
||
+ h->root.u.def.value);
|
||
irel->r_symndx = esec->output_section->target_index;
|
||
irel->r_type = R_POS;
|
||
irel->r_size = 31;
|
||
finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL;
|
||
++osec->reloc_count;
|
||
|
||
ldrel.l_vaddr = irel->r_vaddr;
|
||
if (strcmp (esec->output_section->name, ".text") == 0)
|
||
ldrel.l_symndx = 0;
|
||
else if (strcmp (esec->output_section->name, ".data") == 0)
|
||
ldrel.l_symndx = 1;
|
||
else if (strcmp (esec->output_section->name, ".bss") == 0)
|
||
ldrel.l_symndx = 2;
|
||
else
|
||
{
|
||
(*_bfd_error_handler)
|
||
("%s: loader reloc in unrecognized section `%s'",
|
||
bfd_get_filename (output_bfd),
|
||
esec->output_section->name);
|
||
bfd_set_error (bfd_error_nonrepresentable_section);
|
||
return false;
|
||
}
|
||
ldrel.l_rtype = (31 << 8) | R_POS;
|
||
ldrel.l_rsecnm = oindx;
|
||
xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel);
|
||
++finfo->ldrel;
|
||
|
||
bfd_put_32 (output_bfd, xcoff_data (output_bfd)->toc, p + 4);
|
||
|
||
tsec = coff_section_from_bfd_index (output_bfd,
|
||
xcoff_data (output_bfd)->sntoc);
|
||
|
||
++irel;
|
||
irel->r_vaddr = (osec->vma
|
||
+ sec->output_offset
|
||
+ h->root.u.def.value
|
||
+ 4);
|
||
irel->r_symndx = tsec->output_section->target_index;
|
||
irel->r_type = R_POS;
|
||
irel->r_size = 31;
|
||
finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL;
|
||
++osec->reloc_count;
|
||
|
||
ldrel.l_vaddr = irel->r_vaddr;
|
||
if (strcmp (tsec->output_section->name, ".text") == 0)
|
||
ldrel.l_symndx = 0;
|
||
else if (strcmp (tsec->output_section->name, ".data") == 0)
|
||
ldrel.l_symndx = 1;
|
||
else if (strcmp (tsec->output_section->name, ".bss") == 0)
|
||
ldrel.l_symndx = 2;
|
||
else
|
||
{
|
||
(*_bfd_error_handler)
|
||
("%s: loader reloc in unrecognized section `%s'",
|
||
bfd_get_filename (output_bfd),
|
||
tsec->output_section->name);
|
||
bfd_set_error (bfd_error_nonrepresentable_section);
|
||
return false;
|
||
}
|
||
ldrel.l_rtype = (31 << 8) | R_POS;
|
||
ldrel.l_rsecnm = oindx;
|
||
xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel);
|
||
++finfo->ldrel;
|
||
}
|
||
|
||
if (h->indx >= 0)
|
||
{
|
||
BFD_ASSERT (outsym == finfo->outsyms);
|
||
return true;
|
||
}
|
||
|
||
if (h->indx != -2
|
||
&& (finfo->info->strip == strip_all
|
||
|| (finfo->info->strip == strip_some
|
||
&& (bfd_hash_lookup (finfo->info->keep_hash,
|
||
h->root.root.string, false, false)
|
||
== NULL))))
|
||
{
|
||
BFD_ASSERT (outsym == finfo->outsyms);
|
||
return true;
|
||
}
|
||
|
||
if (h->indx != -2
|
||
&& (h->flags & (XCOFF_REF_REGULAR | XCOFF_DEF_REGULAR)) == 0)
|
||
{
|
||
BFD_ASSERT (outsym == finfo->outsyms);
|
||
return true;
|
||
}
|
||
|
||
memset (&aux, 0, sizeof aux);
|
||
|
||
h->indx = obj_raw_syment_count (output_bfd);
|
||
|
||
if (strlen (h->root.root.string) <= SYMNMLEN)
|
||
strncpy (isym._n._n_name, h->root.root.string, SYMNMLEN);
|
||
else
|
||
{
|
||
boolean hash;
|
||
bfd_size_type indx;
|
||
|
||
hash = true;
|
||
if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
|
||
hash = false;
|
||
indx = _bfd_stringtab_add (finfo->strtab, h->root.root.string, hash,
|
||
false);
|
||
if (indx == (bfd_size_type) -1)
|
||
return false;
|
||
isym._n._n_n._n_zeroes = 0;
|
||
isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx;
|
||
}
|
||
|
||
if (h->root.type == bfd_link_hash_undefined
|
||
|| h->root.type == bfd_link_hash_undefweak)
|
||
{
|
||
isym.n_value = 0;
|
||
isym.n_scnum = N_UNDEF;
|
||
isym.n_sclass = C_EXT;
|
||
aux.x_csect.x_smtyp = XTY_ER;
|
||
}
|
||
else if ((h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
&& h->smclas == XMC_XO)
|
||
{
|
||
BFD_ASSERT (bfd_is_abs_section (h->root.u.def.section));
|
||
isym.n_value = h->root.u.def.value;
|
||
isym.n_scnum = N_UNDEF;
|
||
isym.n_sclass = C_EXT;
|
||
aux.x_csect.x_smtyp = XTY_ER;
|
||
}
|
||
else if (h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
{
|
||
struct xcoff_link_size_list *l;
|
||
|
||
isym.n_value = (h->root.u.def.section->output_section->vma
|
||
+ h->root.u.def.section->output_offset
|
||
+ h->root.u.def.value);
|
||
isym.n_scnum = h->root.u.def.section->output_section->target_index;
|
||
isym.n_sclass = C_HIDEXT;
|
||
aux.x_csect.x_smtyp = XTY_SD;
|
||
|
||
if ((h->flags & XCOFF_HAS_SIZE) != 0)
|
||
{
|
||
for (l = xcoff_hash_table (finfo->info)->size_list;
|
||
l != NULL;
|
||
l = l->next)
|
||
{
|
||
if (l->h == h)
|
||
{
|
||
aux.x_csect.x_scnlen.l = l->size;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
else if (h->root.type == bfd_link_hash_common)
|
||
{
|
||
isym.n_value = (h->root.u.c.p->section->output_section->vma
|
||
+ h->root.u.c.p->section->output_offset);
|
||
isym.n_scnum = h->root.u.c.p->section->output_section->target_index;
|
||
isym.n_sclass = C_EXT;
|
||
aux.x_csect.x_smtyp = XTY_CM;
|
||
aux.x_csect.x_scnlen.l = h->root.u.c.size;
|
||
}
|
||
else
|
||
abort ();
|
||
|
||
isym.n_type = T_NULL;
|
||
isym.n_numaux = 1;
|
||
|
||
bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym);
|
||
outsym += bfd_coff_symesz (output_bfd);
|
||
|
||
aux.x_csect.x_smclas = h->smclas;
|
||
|
||
bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, T_NULL, isym.n_sclass, 0, 1,
|
||
(PTR) outsym);
|
||
outsym += bfd_coff_auxesz (output_bfd);
|
||
|
||
if ((h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
&& h->smclas != XMC_XO)
|
||
{
|
||
/* We just output an SD symbol. Now output an LD symbol. */
|
||
|
||
h->indx += 2;
|
||
|
||
isym.n_sclass = C_EXT;
|
||
bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym);
|
||
outsym += bfd_coff_symesz (output_bfd);
|
||
|
||
aux.x_csect.x_smtyp = XTY_LD;
|
||
aux.x_csect.x_scnlen.l = obj_raw_syment_count (output_bfd);
|
||
|
||
bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, T_NULL, C_EXT, 0, 1,
|
||
(PTR) outsym);
|
||
outsym += bfd_coff_auxesz (output_bfd);
|
||
}
|
||
|
||
if (bfd_seek (output_bfd,
|
||
(obj_sym_filepos (output_bfd)
|
||
+ (obj_raw_syment_count (output_bfd)
|
||
* bfd_coff_symesz (output_bfd))),
|
||
SEEK_SET) != 0
|
||
|| (bfd_write (finfo->outsyms, outsym - finfo->outsyms, 1, output_bfd)
|
||
!= (bfd_size_type) (outsym - finfo->outsyms)))
|
||
return false;
|
||
obj_raw_syment_count (output_bfd) +=
|
||
(outsym - finfo->outsyms) / bfd_coff_symesz (output_bfd);
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Handle a link order which is supposed to generate a reloc. */
|
||
|
||
static boolean
|
||
xcoff_reloc_link_order (output_bfd, finfo, output_section, link_order)
|
||
bfd *output_bfd;
|
||
struct xcoff_final_link_info *finfo;
|
||
asection *output_section;
|
||
struct bfd_link_order *link_order;
|
||
{
|
||
reloc_howto_type *howto;
|
||
struct xcoff_link_hash_entry *h;
|
||
asection *hsec;
|
||
bfd_vma hval;
|
||
bfd_vma addend;
|
||
struct internal_reloc *irel;
|
||
struct xcoff_link_hash_entry **rel_hash_ptr;
|
||
struct internal_ldrel ldrel;
|
||
|
||
if (link_order->type == bfd_section_reloc_link_order)
|
||
{
|
||
/* We need to somehow locate a symbol in the right section. The
|
||
symbol must either have a value of zero, or we must adjust
|
||
the addend by the value of the symbol. FIXME: Write this
|
||
when we need it. The old linker couldn't handle this anyhow. */
|
||
abort ();
|
||
}
|
||
|
||
howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc);
|
||
if (howto == NULL)
|
||
{
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
|
||
h = ((struct xcoff_link_hash_entry *)
|
||
bfd_wrapped_link_hash_lookup (output_bfd, finfo->info,
|
||
link_order->u.reloc.p->u.name,
|
||
false, false, true));
|
||
if (h == NULL)
|
||
{
|
||
if (! ((*finfo->info->callbacks->unattached_reloc)
|
||
(finfo->info, link_order->u.reloc.p->u.name, (bfd *) NULL,
|
||
(asection *) NULL, (bfd_vma) 0)))
|
||
return false;
|
||
return true;
|
||
}
|
||
|
||
if (h->root.type == bfd_link_hash_common)
|
||
{
|
||
hsec = h->root.u.c.p->section;
|
||
hval = 0;
|
||
}
|
||
else if (h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
{
|
||
hsec = h->root.u.def.section;
|
||
hval = h->root.u.def.value;
|
||
}
|
||
else
|
||
{
|
||
hsec = NULL;
|
||
hval = 0;
|
||
}
|
||
|
||
addend = link_order->u.reloc.p->addend;
|
||
if (hsec != NULL)
|
||
addend += (hsec->output_section->vma
|
||
+ hsec->output_offset
|
||
+ hval);
|
||
|
||
if (addend != 0)
|
||
{
|
||
bfd_size_type size;
|
||
bfd_byte *buf;
|
||
bfd_reloc_status_type rstat;
|
||
boolean ok;
|
||
|
||
size = bfd_get_reloc_size (howto);
|
||
buf = (bfd_byte *) bfd_zmalloc (size);
|
||
if (buf == NULL)
|
||
return false;
|
||
|
||
rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf);
|
||
switch (rstat)
|
||
{
|
||
case bfd_reloc_ok:
|
||
break;
|
||
default:
|
||
case bfd_reloc_outofrange:
|
||
abort ();
|
||
case bfd_reloc_overflow:
|
||
if (! ((*finfo->info->callbacks->reloc_overflow)
|
||
(finfo->info, link_order->u.reloc.p->u.name,
|
||
howto->name, addend, (bfd *) NULL, (asection *) NULL,
|
||
(bfd_vma) 0)))
|
||
{
|
||
free (buf);
|
||
return false;
|
||
}
|
||
break;
|
||
}
|
||
ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf,
|
||
(file_ptr) link_order->offset, size);
|
||
free (buf);
|
||
if (! ok)
|
||
return false;
|
||
}
|
||
|
||
/* Store the reloc information in the right place. It will get
|
||
swapped and written out at the end of the final_link routine. */
|
||
|
||
irel = (finfo->section_info[output_section->target_index].relocs
|
||
+ output_section->reloc_count);
|
||
rel_hash_ptr = (finfo->section_info[output_section->target_index].rel_hashes
|
||
+ output_section->reloc_count);
|
||
|
||
memset (irel, 0, sizeof (struct internal_reloc));
|
||
*rel_hash_ptr = NULL;
|
||
|
||
irel->r_vaddr = output_section->vma + link_order->offset;
|
||
|
||
if (h->indx >= 0)
|
||
irel->r_symndx = h->indx;
|
||
else
|
||
{
|
||
/* Set the index to -2 to force this symbol to get written out. */
|
||
h->indx = -2;
|
||
*rel_hash_ptr = h;
|
||
irel->r_symndx = 0;
|
||
}
|
||
|
||
irel->r_type = howto->type;
|
||
irel->r_size = howto->bitsize - 1;
|
||
if (howto->complain_on_overflow == complain_overflow_signed)
|
||
irel->r_size |= 0x80;
|
||
|
||
++output_section->reloc_count;
|
||
|
||
/* Now output the reloc to the .loader section. */
|
||
|
||
ldrel.l_vaddr = irel->r_vaddr;
|
||
|
||
if (hsec != NULL)
|
||
{
|
||
const char *secname;
|
||
|
||
secname = hsec->output_section->name;
|
||
|
||
if (strcmp (secname, ".text") == 0)
|
||
ldrel.l_symndx = 0;
|
||
else if (strcmp (secname, ".data") == 0)
|
||
ldrel.l_symndx = 1;
|
||
else if (strcmp (secname, ".bss") == 0)
|
||
ldrel.l_symndx = 2;
|
||
else
|
||
{
|
||
(*_bfd_error_handler)
|
||
("%s: loader reloc in unrecognized section `%s'",
|
||
bfd_get_filename (output_bfd), secname);
|
||
bfd_set_error (bfd_error_nonrepresentable_section);
|
||
return false;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (h->ldindx < 0)
|
||
{
|
||
(*_bfd_error_handler)
|
||
("%s: `%s' in loader reloc but not loader sym",
|
||
bfd_get_filename (output_bfd),
|
||
h->root.root.string);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
ldrel.l_symndx = h->ldindx;
|
||
}
|
||
|
||
ldrel.l_rtype = (irel->r_size << 8) | irel->r_type;
|
||
ldrel.l_rsecnm = output_section->target_index;
|
||
xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel);
|
||
++finfo->ldrel;
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Sort relocs by VMA. This is called via qsort. */
|
||
|
||
static int
|
||
xcoff_sort_relocs (p1, p2)
|
||
const PTR p1;
|
||
const PTR p2;
|
||
{
|
||
const struct internal_reloc *r1 = (const struct internal_reloc *) p1;
|
||
const struct internal_reloc *r2 = (const struct internal_reloc *) p2;
|
||
|
||
if (r1->r_vaddr > r2->r_vaddr)
|
||
return 1;
|
||
else if (r1->r_vaddr < r2->r_vaddr)
|
||
return -1;
|
||
else
|
||
return 0;
|
||
}
|
||
|
||
/* This is the relocation function for the RS/6000/POWER/PowerPC.
|
||
This is currently the only processor which uses XCOFF; I hope that
|
||
will never change. */
|
||
|
||
boolean
|
||
_bfd_ppc_xcoff_relocate_section (output_bfd, info, input_bfd,
|
||
input_section, contents, relocs, syms,
|
||
sections)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
bfd *input_bfd;
|
||
asection *input_section;
|
||
bfd_byte *contents;
|
||
struct internal_reloc *relocs;
|
||
struct internal_syment *syms;
|
||
asection **sections;
|
||
{
|
||
struct internal_reloc *rel;
|
||
struct internal_reloc *relend;
|
||
|
||
rel = relocs;
|
||
relend = rel + input_section->reloc_count;
|
||
for (; rel < relend; rel++)
|
||
{
|
||
long symndx;
|
||
struct xcoff_link_hash_entry *h;
|
||
struct internal_syment *sym;
|
||
bfd_vma addend;
|
||
bfd_vma val;
|
||
struct reloc_howto_struct howto;
|
||
bfd_reloc_status_type rstat;
|
||
|
||
/* Relocation type R_REF is a special relocation type which is
|
||
merely used to prevent garbage collection from occurring for
|
||
the csect including the symbol which it references. */
|
||
if (rel->r_type == R_REF)
|
||
continue;
|
||
|
||
symndx = rel->r_symndx;
|
||
|
||
if (symndx == -1)
|
||
{
|
||
h = NULL;
|
||
sym = NULL;
|
||
addend = 0;
|
||
}
|
||
else
|
||
{
|
||
h = obj_xcoff_sym_hashes (input_bfd)[symndx];
|
||
sym = syms + symndx;
|
||
addend = - sym->n_value;
|
||
}
|
||
|
||
/* We build the howto information on the fly. */
|
||
|
||
howto.type = rel->r_type;
|
||
howto.rightshift = 0;
|
||
howto.size = 2;
|
||
howto.bitsize = (rel->r_size & 0x1f) + 1;
|
||
howto.pc_relative = false;
|
||
howto.bitpos = 0;
|
||
if ((rel->r_size & 0x80) != 0)
|
||
howto.complain_on_overflow = complain_overflow_signed;
|
||
else
|
||
howto.complain_on_overflow = complain_overflow_bitfield;
|
||
howto.special_function = NULL;
|
||
howto.name = "internal";
|
||
howto.partial_inplace = true;
|
||
if (howto.bitsize == 32)
|
||
howto.src_mask = howto.dst_mask = 0xffffffff;
|
||
else
|
||
{
|
||
howto.src_mask = howto.dst_mask = (1 << howto.bitsize) - 1;
|
||
if (howto.bitsize == 16)
|
||
howto.size = 1;
|
||
}
|
||
howto.pcrel_offset = false;
|
||
|
||
val = 0;
|
||
|
||
if (h == NULL)
|
||
{
|
||
asection *sec;
|
||
|
||
if (symndx == -1)
|
||
{
|
||
sec = bfd_abs_section_ptr;
|
||
val = 0;
|
||
}
|
||
else
|
||
{
|
||
sec = sections[symndx];
|
||
/* Hack to make sure we use the right TOC anchor value
|
||
if this reloc is against the TOC anchor. */
|
||
if (sec->name[3] == '0'
|
||
&& strcmp (sec->name, ".tc0") == 0)
|
||
val = xcoff_data (output_bfd)->toc;
|
||
else
|
||
val = (sec->output_section->vma
|
||
+ sec->output_offset
|
||
+ sym->n_value
|
||
- sec->vma);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
{
|
||
asection *sec;
|
||
|
||
sec = h->root.u.def.section;
|
||
val = (h->root.u.def.value
|
||
+ sec->output_section->vma
|
||
+ sec->output_offset);
|
||
}
|
||
else if (h->root.type == bfd_link_hash_common)
|
||
{
|
||
asection *sec;
|
||
|
||
sec = h->root.u.c.p->section;
|
||
val = (sec->output_section->vma
|
||
+ sec->output_offset);
|
||
}
|
||
else if ((h->flags & XCOFF_DEF_DYNAMIC) != 0
|
||
|| (h->flags & XCOFF_IMPORT) != 0)
|
||
{
|
||
/* Every symbol in a shared object is defined somewhere. */
|
||
val = 0;
|
||
}
|
||
else if (! info->relocateable)
|
||
{
|
||
if (! ((*info->callbacks->undefined_symbol)
|
||
(info, h->root.root.string, input_bfd, input_section,
|
||
rel->r_vaddr - input_section->vma)))
|
||
return false;
|
||
|
||
/* Don't try to process the reloc. It can't help, and
|
||
it may generate another error. */
|
||
continue;
|
||
}
|
||
}
|
||
|
||
/* I took the relocation type definitions from two documents:
|
||
the PowerPC AIX Version 4 Application Binary Interface, First
|
||
Edition (April 1992), and the PowerOpen ABI, Big-Endian
|
||
32-Bit Hardware Implementation (June 30, 1994). Differences
|
||
between the documents are noted below. */
|
||
|
||
switch (rel->r_type)
|
||
{
|
||
case R_RTB:
|
||
case R_RRTBI:
|
||
case R_RRTBA:
|
||
/* These relocs are defined by the PowerPC ABI to be
|
||
relative branches which use half of the difference
|
||
between the symbol and the program counter. I can't
|
||
quite figure out when this is useful. These relocs are
|
||
not defined by the PowerOpen ABI. */
|
||
default:
|
||
(*_bfd_error_handler)
|
||
("%s: unsupported relocation type 0x%02x",
|
||
bfd_get_filename (input_bfd), (unsigned int) rel->r_type);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
case R_POS:
|
||
/* Simple positive relocation. */
|
||
break;
|
||
case R_NEG:
|
||
/* Simple negative relocation. */
|
||
val = - val;
|
||
break;
|
||
case R_REL:
|
||
/* Simple PC relative relocation. */
|
||
howto.pc_relative = true;
|
||
break;
|
||
case R_TOC:
|
||
/* TOC relative relocation. The value in the instruction in
|
||
the input file is the offset from the input file TOC to
|
||
the desired location. We want the offset from the final
|
||
TOC to the desired location. We have:
|
||
isym = iTOC + in
|
||
iinsn = in + o
|
||
osym = oTOC + on
|
||
oinsn = on + o
|
||
so we must change insn by on - in.
|
||
*/
|
||
case R_GL:
|
||
/* Global linkage relocation. The value of this relocation
|
||
is the address of the entry in the TOC section. */
|
||
case R_TCL:
|
||
/* Local object TOC address. I can't figure out the
|
||
difference between this and case R_GL. */
|
||
case R_TRL:
|
||
/* TOC relative relocation. A TOC relative load instruction
|
||
which may be changed to a load address instruction.
|
||
FIXME: We don't currently implement this optimization. */
|
||
case R_TRLA:
|
||
/* TOC relative relocation. This is a TOC relative load
|
||
address instruction which may be changed to a load
|
||
instruction. FIXME: I don't know if this is the correct
|
||
implementation. */
|
||
if (h != NULL && h->smclas != XMC_TD)
|
||
{
|
||
if (h->toc_section == NULL)
|
||
{
|
||
(*_bfd_error_handler)
|
||
("%s: TOC reloc at 0x%x to symbol `%s' with no TOC entry",
|
||
bfd_get_filename (input_bfd), rel->r_vaddr,
|
||
h->root.root.string);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
|
||
BFD_ASSERT ((h->flags & XCOFF_SET_TOC) == 0);
|
||
val = (h->toc_section->output_section->vma
|
||
+ h->toc_section->output_offset);
|
||
}
|
||
|
||
val = ((val - xcoff_data (output_bfd)->toc)
|
||
- (sym->n_value - xcoff_data (input_bfd)->toc));
|
||
addend = 0;
|
||
break;
|
||
case R_BA:
|
||
/* Absolute branch. We don't want to mess with the lower
|
||
two bits of the instruction. */
|
||
case R_CAI:
|
||
/* The PowerPC ABI defines this as an absolute call which
|
||
may be modified to become a relative call. The PowerOpen
|
||
ABI does not define this relocation type. */
|
||
case R_RBA:
|
||
/* Absolute branch which may be modified to become a
|
||
relative branch. */
|
||
case R_RBAC:
|
||
/* The PowerPC ABI defines this as an absolute branch to a
|
||
fixed address which may be modified to an absolute branch
|
||
to a symbol. The PowerOpen ABI does not define this
|
||
relocation type. */
|
||
case R_RBRC:
|
||
/* The PowerPC ABI defines this as an absolute branch to a
|
||
fixed address which may be modified to a relative branch.
|
||
The PowerOpen ABI does not define this relocation type. */
|
||
howto.src_mask &= ~3;
|
||
howto.dst_mask = howto.src_mask;
|
||
break;
|
||
case R_BR:
|
||
/* Relative branch. We don't want to mess with the lower
|
||
two bits of the instruction. */
|
||
case R_CREL:
|
||
/* The PowerPC ABI defines this as a relative call which may
|
||
be modified to become an absolute call. The PowerOpen
|
||
ABI does not define this relocation type. */
|
||
case R_RBR:
|
||
/* A relative branch which may be modified to become an
|
||
absolute branch. FIXME: We don't implement this,
|
||
although we should for symbols of storage mapping class
|
||
XMC_XO. */
|
||
howto.pc_relative = true;
|
||
howto.src_mask &= ~3;
|
||
howto.dst_mask = howto.src_mask;
|
||
break;
|
||
case R_RL:
|
||
/* The PowerPC AIX ABI describes this as a load which may be
|
||
changed to a load address. The PowerOpen ABI says this
|
||
is the same as case R_POS. */
|
||
break;
|
||
case R_RLA:
|
||
/* The PowerPC AIX ABI describes this as a load address
|
||
which may be changed to a load. The PowerOpen ABI says
|
||
this is the same as R_POS. */
|
||
break;
|
||
}
|
||
|
||
/* If we see an R_BR or R_RBR reloc which is jumping to global
|
||
linkage code, and it is followed by an appropriate cror nop
|
||
instruction, we replace the cror with lwz r2,20(r1). This
|
||
restores the TOC after the glink code. Contrariwise, if the
|
||
call is followed by a lwz r2,20(r1), but the call is not
|
||
going to global linkage code, we can replace the load with a
|
||
cror. */
|
||
if ((rel->r_type == R_BR || rel->r_type == R_RBR)
|
||
&& h != NULL
|
||
&& h->root.type == bfd_link_hash_defined
|
||
&& (rel->r_vaddr - input_section->vma + 8
|
||
<= input_section->_cooked_size))
|
||
{
|
||
bfd_byte *pnext;
|
||
unsigned long next;
|
||
|
||
pnext = contents + (rel->r_vaddr - input_section->vma) + 4;
|
||
next = bfd_get_32 (input_bfd, pnext);
|
||
|
||
/* The _ptrgl function is magic. It is used by the AIX
|
||
compiler to call a function through a pointer. */
|
||
if (h->smclas == XMC_GL
|
||
|| strcmp (h->root.root.string, "._ptrgl") == 0)
|
||
{
|
||
if (next == 0x4def7b82 /* cror 15,15,15 */
|
||
|| next == 0x4ffffb82) /* cror 31,31,31 */
|
||
bfd_put_32 (input_bfd, 0x80410014, pnext); /* lwz r1,20(r1) */
|
||
}
|
||
else
|
||
{
|
||
if (next == 0x80410014) /* lwz r1,20(r1) */
|
||
bfd_put_32 (input_bfd, 0x4ffffb82, pnext); /* cror 31,31,31 */
|
||
}
|
||
}
|
||
|
||
/* A PC relative reloc includes the section address. */
|
||
if (howto.pc_relative)
|
||
addend += input_section->vma;
|
||
|
||
rstat = _bfd_final_link_relocate (&howto, input_bfd, input_section,
|
||
contents,
|
||
rel->r_vaddr - input_section->vma,
|
||
val, addend);
|
||
|
||
switch (rstat)
|
||
{
|
||
default:
|
||
abort ();
|
||
case bfd_reloc_ok:
|
||
break;
|
||
case bfd_reloc_overflow:
|
||
{
|
||
const char *name;
|
||
char buf[SYMNMLEN + 1];
|
||
char howto_name[10];
|
||
|
||
if (symndx == -1)
|
||
name = "*ABS*";
|
||
else if (h != NULL)
|
||
name = h->root.root.string;
|
||
else
|
||
{
|
||
name = _bfd_coff_internal_syment_name (input_bfd, sym, buf);
|
||
if (name == NULL)
|
||
return false;
|
||
}
|
||
sprintf (howto_name, "0x%02x", rel->r_type);
|
||
|
||
if (! ((*info->callbacks->reloc_overflow)
|
||
(info, name, howto_name, (bfd_vma) 0, input_bfd,
|
||
input_section, rel->r_vaddr - input_section->vma)))
|
||
return false;
|
||
}
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|