446 lines
12 KiB
C
446 lines
12 KiB
C
/* BFD back-end for WDC 65816 COFF binaries.
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Copyright 1995, 96, 1997 Free Software Foundation, Inc.
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Written by Steve Chamberlain, <sac@cygnus.com>.
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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 "libbfd.h"
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#include "bfdlink.h"
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#include "coff/w65.h"
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#include "coff/internal.h"
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#include "libcoff.h"
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#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1)
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static reloc_howto_type howto_table[] =
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{
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HOWTO (R_W65_ABS8, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, "abs8", true, 0x000000ff, 0x000000ff, false),
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HOWTO (R_W65_ABS16, 1, 0, 16, false, 0, complain_overflow_bitfield, 0, "abs16", true, 0x0000ffff, 0x0000ffff, false),
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HOWTO (R_W65_ABS24, 0, 2, 32, false, 0, complain_overflow_bitfield, 0, "abs24", true, 0x00ffffff, 0x00ffffff, false),
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HOWTO (R_W65_ABS8S8, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, ">abs8", true, 0x000000ff, 0x000000ff, false),
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HOWTO (R_W65_ABS8S16, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, "^abs8", true, 0x000000ff, 0x000000ff, false),
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HOWTO (R_W65_ABS16S8, 1, 0, 16, false, 0, complain_overflow_bitfield, 0, ">abs16", true, 0x0000ffff, 0x0000ffff, false),
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HOWTO (R_W65_ABS16S16,1, 0, 16, false, 0, complain_overflow_bitfield, 0, "^abs16", true, 0x0000ffff, 0x0000ffff, false),
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HOWTO (R_W65_PCR8, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, "pcrel8", true, 0x000000ff, 0x000000ff, true),
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HOWTO (R_W65_PCR16, 1, 0, 16, false, 0, complain_overflow_bitfield, 0, "pcrel16", true, 0x0000ffff, 0x0000ffff, true),
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HOWTO (R_W65_DP, 0, 0, 8, false, 0, complain_overflow_bitfield, 0, "dp", true, 0x000000ff, 0x000000ff, false),
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};
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/* Turn a howto into a reloc number */
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#define SELECT_RELOC(x,howto) \
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{ x.r_type = select_reloc(howto); }
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#define BADMAG(x) (W65BADMAG(x))
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#define W65 1 /* Customize coffcode.h */
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#define __A_MAGIC_SET__
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/* Code to swap in the reloc */
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#define SWAP_IN_RELOC_OFFSET bfd_h_get_32
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#define SWAP_OUT_RELOC_OFFSET bfd_h_put_32
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#define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \
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dst->r_stuff[0] = 'S'; \
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dst->r_stuff[1] = 'C';
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static int
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select_reloc (howto)
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reloc_howto_type *howto;
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{
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return howto->type ;
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}
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/* Code to turn a r_type into a howto ptr, uses the above howto table
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*/
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static void
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rtype2howto (internal, dst)
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arelent *internal;
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struct internal_reloc *dst;
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{
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internal->howto = howto_table + dst->r_type - 1;
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}
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#define RTYPE2HOWTO(internal, relocentry) rtype2howto(internal,relocentry)
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/* Perform any necessary magic to the addend in a reloc entry */
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#define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
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cache_ptr->addend = ext_reloc.r_offset;
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#define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \
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reloc_processing(relent, reloc, symbols, abfd, section)
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static void
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reloc_processing (relent, reloc, symbols, abfd, section)
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arelent * relent;
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struct internal_reloc *reloc;
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asymbol ** symbols;
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bfd * abfd;
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asection * section;
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{
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relent->address = reloc->r_vaddr;
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rtype2howto (relent, reloc);
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if (((int) reloc->r_symndx) > 0)
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{
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relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
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}
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else
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{
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relent->sym_ptr_ptr = (asymbol **)&(bfd_abs_symbol);
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}
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relent->addend = reloc->r_offset;
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relent->address -= section->vma;
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/* relent->section = 0;*/
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}
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static int
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h8300_reloc16_estimate(abfd, input_section, reloc, shrink, link_info)
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bfd *abfd;
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asection *input_section;
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arelent *reloc;
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unsigned int shrink;
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struct bfd_link_info *link_info;
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{
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bfd_vma value;
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bfd_vma dot;
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bfd_vma gap;
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/* The address of the thing to be relocated will have moved back by
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the size of the shrink - but we don't change reloc->address here,
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since we need it to know where the relocation lives in the source
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uncooked section */
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/* reloc->address -= shrink; conceptual */
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bfd_vma address = reloc->address - shrink;
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switch (reloc->howto->type)
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{
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case R_MOV16B2:
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case R_JMP2:
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shrink+=2;
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break;
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/* Thing is a move one byte */
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case R_MOV16B1:
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value = bfd_coff_reloc16_get_value(reloc, link_info, input_section);
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if (value >= 0xff00)
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{
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/* Change the reloc type from 16bit, possible 8 to 8bit
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possible 16 */
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reloc->howto = reloc->howto + 1;
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/* The place to relc moves back by one */
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/* This will be two bytes smaller in the long run */
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shrink +=2 ;
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bfd_perform_slip(abfd, 2, input_section, address);
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}
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break;
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/* This is the 24 bit branch which could become an 8 bitter,
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the relocation points to the first byte of the insn, not the
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actual data */
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case R_JMPL1:
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value = bfd_coff_reloc16_get_value(reloc, link_info, input_section);
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dot = input_section->output_section->vma +
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input_section->output_offset + address;
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/* See if the address we're looking at within 127 bytes of where
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we are, if so then we can use a small branch rather than the
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jump we were going to */
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gap = value - dot ;
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if (-120 < (long)gap && (long)gap < 120 )
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{
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/* Change the reloc type from 24bit, possible 8 to 8bit
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possible 32 */
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reloc->howto = reloc->howto + 1;
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/* This will be two bytes smaller in the long run */
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shrink +=2 ;
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bfd_perform_slip(abfd, 2, input_section, address);
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}
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break;
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case R_JMP1:
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value = bfd_coff_reloc16_get_value(reloc, link_info, input_section);
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dot = input_section->output_section->vma +
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input_section->output_offset + address;
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/* See if the address we're looking at within 127 bytes of where
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we are, if so then we can use a small branch rather than the
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jump we were going to */
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gap = value - (dot - shrink);
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if (-120 < (long)gap && (long)gap < 120 )
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{
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/* Change the reloc type from 16bit, possible 8 to 8bit
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possible 16 */
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reloc->howto = reloc->howto + 1;
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/* The place to relc moves back by one */
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/* This will be two bytes smaller in the long run */
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shrink +=2 ;
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bfd_perform_slip(abfd, 2, input_section, address);
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}
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break;
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}
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return shrink;
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}
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/* First phase of a relaxing link */
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/* Reloc types
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large small
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R_MOV16B1 R_MOV16B2 mov.b with 16bit or 8 bit address
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R_JMP1 R_JMP2 jmp or pcrel branch
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R_JMPL1 R_JMPL_B8 24jmp or pcrel branch
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R_MOV24B1 R_MOV24B2 24 or 8 bit reloc for mov.b
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*/
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static void
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h8300_reloc16_extra_cases (abfd, link_info, link_order, reloc, data, src_ptr,
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dst_ptr)
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bfd *abfd;
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struct bfd_link_info *link_info;
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struct bfd_link_order *link_order;
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arelent *reloc;
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bfd_byte *data;
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unsigned int *src_ptr;
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unsigned int *dst_ptr;
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{
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unsigned int src_address = *src_ptr;
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unsigned int dst_address = *dst_ptr;
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asection *input_section = link_order->u.indirect.section;
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switch (reloc->howto->type)
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{
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case R_W65_ABS8:
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case R_W65_DP:
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{
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unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info,
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input_section);
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bfd_put_8 (abfd, gap, data + dst_address);
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dst_address += 1;
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src_address += 1;
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}
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break;
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case R_W65_ABS8S8:
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{
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unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info,
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input_section);
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gap >>= 8;
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bfd_put_8 (abfd, gap, data + dst_address);
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dst_address += 1;
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src_address += 1;
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}
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break;
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case R_W65_ABS8S16:
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{
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unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info,
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input_section);
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gap >>=16;
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bfd_put_8 (abfd, gap, data + dst_address);
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dst_address += 1;
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src_address += 1;
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}
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break;
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case R_W65_ABS16:
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{
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unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info,
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input_section);
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bfd_put_16 (abfd, gap, data + dst_address);
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dst_address += 2;
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src_address += 2;
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}
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break;
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case R_W65_ABS16S8:
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{
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unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info,
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input_section);
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gap >>= 8;
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bfd_put_16 (abfd, gap, data + dst_address);
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dst_address += 2;
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src_address += 2;
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}
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break;
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case R_W65_ABS16S16:
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{
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unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info,
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input_section);
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gap >>= 16;
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bfd_put_16 (abfd, gap, data + dst_address);
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dst_address += 2;
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src_address += 2;
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}
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break;
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case R_W65_ABS24:
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{
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unsigned int gap = bfd_coff_reloc16_get_value (reloc, link_info,
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input_section);
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bfd_put_16 (abfd, gap, data + dst_address);
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bfd_put_8 (abfd, gap>>16, data+dst_address+2);
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dst_address += 3;
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src_address += 3;
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}
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break;
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case R_W65_PCR8:
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{
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int gap = bfd_coff_reloc16_get_value (reloc, link_info,
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input_section);
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bfd_vma dot = link_order->offset
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+ dst_address
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+ link_order->u.indirect.section->output_section->vma;
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gap -= dot + 1;
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if (gap < -128 || gap > 127) {
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if (! ((*link_info->callbacks->reloc_overflow)
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(link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
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reloc->howto->name, reloc->addend, input_section->owner,
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input_section, reloc->address)))
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abort();
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}
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bfd_put_8 (abfd, gap, data + dst_address);
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dst_address += 1;
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src_address += 1;
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}
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break;
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case R_W65_PCR16:
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{
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bfd_vma gap = bfd_coff_reloc16_get_value (reloc, link_info,
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input_section);
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bfd_vma dot = link_order->offset
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+ dst_address
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+ link_order->u.indirect.section->output_section->vma;
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/* This wraps within the page, so ignore the relativeness, look at the
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high part */
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if ((gap & 0xf0000) != (dot & 0xf0000)) {
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if (! ((*link_info->callbacks->reloc_overflow)
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(link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
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reloc->howto->name, reloc->addend, input_section->owner,
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input_section, reloc->address)))
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abort();
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}
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gap -= dot + 2;
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bfd_put_16 (abfd, gap, data + dst_address);
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dst_address += 2;
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src_address += 2;
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}
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break;
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default:
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printf("ignoring reloc %s\n", reloc->howto->name);
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break;
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}
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*src_ptr = src_address;
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*dst_ptr = dst_address;
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}
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#define coff_reloc16_extra_cases h8300_reloc16_extra_cases
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#define coff_reloc16_estimate h8300_reloc16_estimate
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#include "coffcode.h"
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#undef coff_bfd_get_relocated_section_contents
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#undef coff_bfd_relax_section
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#define coff_bfd_get_relocated_section_contents \
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bfd_coff_reloc16_get_relocated_section_contents
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#define coff_bfd_relax_section bfd_coff_reloc16_relax_section
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bfd_target w65_vec =
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{
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"coff-w65", /* name */
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bfd_target_coff_flavour,
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BFD_ENDIAN_LITTLE, /* data byte order is little */
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BFD_ENDIAN_LITTLE, /* header byte order is little */
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(HAS_RELOC | EXEC_P | /* object flags */
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HAS_LINENO | HAS_DEBUG |
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HAS_SYMS | HAS_LOCALS | WP_TEXT | BFD_IS_RELAXABLE ),
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(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
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'_', /* leading char */
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'/', /* ar_pad_char */
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15, /* ar_max_namelen */
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bfd_getl64, bfd_getl_signed_64, bfd_putl64,
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bfd_getl32, bfd_getl_signed_32, bfd_putl32,
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bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
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bfd_getl64, bfd_getl_signed_64, bfd_putl64,
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bfd_getl32, bfd_getl_signed_32, bfd_putl32,
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bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
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{_bfd_dummy_target, coff_object_p, /* bfd_check_format */
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bfd_generic_archive_p, _bfd_dummy_target},
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{bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
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bfd_false},
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{bfd_false, coff_write_object_contents, /* bfd_write_contents */
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_bfd_write_archive_contents, bfd_false},
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BFD_JUMP_TABLE_GENERIC (coff),
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BFD_JUMP_TABLE_COPY (coff),
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BFD_JUMP_TABLE_CORE (_bfd_nocore),
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BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
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BFD_JUMP_TABLE_SYMBOLS (coff),
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BFD_JUMP_TABLE_RELOCS (coff),
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BFD_JUMP_TABLE_WRITE (coff),
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BFD_JUMP_TABLE_LINK (coff),
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BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
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COFF_SWAP_TABLE,
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};
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