1660 lines
49 KiB
C
1660 lines
49 KiB
C
/* Read os9/os9k symbol tables and convert to internal format, for GDB.
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Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1996
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Free Software Foundation, Inc.
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This file is part of GDB.
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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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/* This module provides three functions: os9k_symfile_init,
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which initializes to read a symbol file; os9k_new_init, which
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discards existing cached information when all symbols are being
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discarded; and os9k_symfile_read, which reads a symbol table
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from a file.
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os9k_symfile_read only does the minimum work necessary for letting the
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user "name" things symbolically; it does not read the entire symtab.
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Instead, it reads the external and static symbols and puts them in partial
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symbol tables. When more extensive information is requested of a
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file, the corresponding partial symbol table is mutated into a full
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fledged symbol table by going back and reading the symbols
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for real. os9k_psymtab_to_symtab() is the function that does this */
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#include "defs.h"
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#include "gdb_string.h"
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#include <stdio.h>
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#if defined(USG) || defined(__CYGNUSCLIB__)
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#include <sys/types.h>
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#include <fcntl.h>
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#endif
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#include "obstack.h"
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#include <sys/param.h>
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#ifndef NO_SYS_FILE
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#include <sys/file.h>
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#endif
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#include "gdb_stat.h"
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#include <ctype.h>
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#include "symtab.h"
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#include "breakpoint.h"
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#include "command.h"
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#include "target.h"
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#include "gdbcore.h" /* for bfd stuff */
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#include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
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#include "symfile.h"
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#include "objfiles.h"
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#include "buildsym.h"
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#include "gdb-stabs.h"
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#include "demangle.h"
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#include "language.h" /* Needed inside partial-stab.h */
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#include "complaints.h"
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#include "os9k.h"
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#include "stabsread.h"
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/* Each partial symbol table entry contains a pointer to private data for the
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read_symtab() function to use when expanding a partial symbol table entry
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to a full symbol table entry.
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For dbxread this structure contains the offset within the file symbol table
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of first local symbol for this file, and count of the section
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of the symbol table devoted to this file's symbols (actually, the section
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bracketed may contain more than just this file's symbols). It also contains
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further information needed to locate the symbols if they are in an ELF file.
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If ldsymcnt is 0, the only reason for this thing's existence is the
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dependency list. Nothing else will happen when it is read in. */
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#define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
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#define LDSYMCNT(p) (((struct symloc *)((p)->read_symtab_private))->ldsymnum)
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struct symloc {
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int ldsymoff;
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int ldsymnum;
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};
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/* Remember what we deduced to be the source language of this psymtab. */
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static enum language psymtab_language = language_unknown;
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/* keep partial symbol table file nested depth */
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static int psymfile_depth = 0;
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/* keep symbol table file nested depth */
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static int symfile_depth = 0;
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/* Nonzero means give verbose info on gdb action. From main.c. */
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extern int info_verbose;
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extern int previous_stab_code;
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/* Name of last function encountered. Used in Solaris to approximate
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object file boundaries. */
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static char *last_function_name;
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/* Complaints about the symbols we have encountered. */
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extern struct complaint lbrac_complaint;
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extern struct complaint unknown_symtype_complaint;
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extern struct complaint unknown_symchar_complaint;
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extern struct complaint lbrac_rbrac_complaint;
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extern struct complaint repeated_header_complaint;
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extern struct complaint repeated_header_name_complaint;
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#if 0
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static struct complaint lbrac_unmatched_complaint =
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{"unmatched Increment Block Entry before symtab pos %d", 0, 0};
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static struct complaint lbrac_mismatch_complaint =
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{"IBE/IDE symbol mismatch at symtab pos %d", 0, 0};
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#endif
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/* Local function prototypes */
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static void
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os9k_read_ofile_symtab PARAMS ((struct partial_symtab *));
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static void
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os9k_psymtab_to_symtab PARAMS ((struct partial_symtab *));
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static void
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os9k_psymtab_to_symtab_1 PARAMS ((struct partial_symtab *));
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static void
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read_os9k_psymtab PARAMS ((struct section_offsets *, struct objfile *,
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CORE_ADDR, int));
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static int
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fill_sym PARAMS ((FILE *, bfd *));
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static void
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os9k_symfile_init PARAMS ((struct objfile *));
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static void
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os9k_new_init PARAMS ((struct objfile *));
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static void
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os9k_symfile_read PARAMS ((struct objfile *, struct section_offsets *, int));
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static void
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os9k_symfile_finish PARAMS ((struct objfile *));
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static void
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os9k_process_one_symbol PARAMS ((int, int, CORE_ADDR, char *,
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struct section_offsets *, struct objfile *));
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static struct partial_symtab *
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os9k_start_psymtab PARAMS ((struct objfile *, struct section_offsets *, char *,
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CORE_ADDR, int, int, struct partial_symbol **,
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struct partial_symbol **));
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static struct partial_symtab *
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os9k_end_psymtab PARAMS ((struct partial_symtab *, char **, int, int, CORE_ADDR,
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struct partial_symtab **, int));
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static void
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record_minimal_symbol PARAMS ((char *, CORE_ADDR, int, struct objfile *,
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struct section_offsets *));
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#define HANDLE_RBRAC(val) \
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if ((val) > pst->texthigh) pst->texthigh = (val);
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#define SWAP_STBHDR(hdrp, abfd) \
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{ \
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(hdrp)->fmtno = bfd_get_16(abfd, (unsigned char *)&(hdrp)->fmtno); \
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(hdrp)->crc = bfd_get_32(abfd, (unsigned char *)&(hdrp)->crc); \
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(hdrp)->offset = bfd_get_32(abfd, (unsigned char *)&(hdrp)->offset); \
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(hdrp)->nsym = bfd_get_32(abfd, (unsigned char *)&(hdrp)->nsym); \
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}
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#define SWAP_STBSYM(symp, abfd) \
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{ \
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(symp)->value = bfd_get_32(abfd, (unsigned char *)&(symp)->value); \
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(symp)->type = bfd_get_16(abfd, (unsigned char *)&(symp)->type); \
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(symp)->stroff = bfd_get_32(abfd, (unsigned char *)&(symp)->stroff); \
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}
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#define N_DATA 0
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#define N_BSS 1
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#define N_RDATA 2
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#define N_IDATA 3
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#define N_TEXT 4
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#define N_ABS 6
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static void
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record_minimal_symbol (name, address, type, objfile, section_offsets)
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char *name;
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CORE_ADDR address;
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int type;
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struct objfile *objfile;
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struct section_offsets *section_offsets;
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{
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enum minimal_symbol_type ms_type;
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switch (type)
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{
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case N_TEXT:
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ms_type = mst_text;
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address += ANOFFSET(section_offsets, SECT_OFF_TEXT);
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break;
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case N_DATA:
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ms_type = mst_data;
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break;
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case N_BSS:
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ms_type = mst_bss;
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break;
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case N_RDATA:
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ms_type = mst_bss;
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break;
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case N_IDATA:
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ms_type = mst_data;
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break;
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case N_ABS:
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ms_type = mst_abs;
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break;
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default:
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ms_type = mst_unknown; break;
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}
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prim_record_minimal_symbol
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(obsavestring (name, strlen(name), &objfile->symbol_obstack),
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address, ms_type, objfile);
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}
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/* read and process .stb file and store in minimal symbol table */
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typedef char mhhdr[80];
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struct stbhdr {
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mhhdr comhdr;
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char * name;
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short fmtno;
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int crc;
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int offset;
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int nsym;
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char *pad;
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};
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struct stbsymbol {
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int value;
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short type;
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int stroff;
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};
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#define STBSYMSIZE 10
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static void
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read_minimal_symbols(objfile, section_offsets)
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struct objfile *objfile;
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struct section_offsets *section_offsets;
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{
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FILE *fp;
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bfd *abfd;
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struct stbhdr hdr;
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struct stbsymbol sym;
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int ch, i, j, off;
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char buf[64], buf1[128];
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fp = objfile->auxf1;
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if (fp == NULL) return;
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abfd = objfile->obfd;
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fread(&hdr.comhdr[0], sizeof(mhhdr), 1, fp);
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i = 0;
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ch = getc(fp);
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while (ch != -1) {
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buf[i] = (char)ch;
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i++;
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if (ch == 0) break;
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ch = getc(fp);
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};
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if (i%2) ch=getc(fp);
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hdr.name = &buf[0];
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fread(&hdr.fmtno, sizeof(hdr.fmtno), 1, fp);
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fread(&hdr.crc, sizeof(hdr.crc), 1, fp);
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fread(&hdr.offset, sizeof(hdr.offset), 1, fp);
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fread(&hdr.nsym, sizeof(hdr.nsym), 1, fp);
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SWAP_STBHDR(&hdr, abfd);
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/* read symbols */
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init_minimal_symbol_collection();
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off = hdr.offset;
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for (i = hdr.nsym; i > 0; i--) {
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fseek(fp, (long)off, 0);
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fread(&sym.value, sizeof(sym.value), 1, fp);
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fread(&sym.type, sizeof(sym.type), 1, fp);
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fread(&sym.stroff, sizeof(sym.stroff), 1, fp);
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SWAP_STBSYM (&sym, abfd);
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fseek(fp, (long)sym.stroff, 0);
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j = 0;
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ch = getc(fp);
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while (ch != -1) {
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buf1[j] = (char)ch;
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j++;
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if (ch == 0) break;
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ch = getc(fp);
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};
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record_minimal_symbol(buf1, sym.value, sym.type&7, objfile, section_offsets);
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off += STBSYMSIZE;
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};
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install_minimal_symbols (objfile);
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return;
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}
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/* Scan and build partial symbols for a symbol file.
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We have been initialized by a call to os9k_symfile_init, which
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put all the relevant info into a "struct os9k_symfile_info",
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hung off the objfile structure.
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SECTION_OFFSETS contains offsets relative to which the symbols in the
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various sections are (depending where the sections were actually loaded).
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MAINLINE is true if we are reading the main symbol
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table (as opposed to a shared lib or dynamically loaded file). */
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static void
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os9k_symfile_read (objfile, section_offsets, mainline)
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struct objfile *objfile;
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struct section_offsets *section_offsets;
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int mainline; /* FIXME comments above */
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{
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bfd *sym_bfd;
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struct cleanup *back_to;
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sym_bfd = objfile->obfd;
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/* If we are reinitializing, or if we have never loaded syms yet, init */
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if (mainline || objfile->global_psymbols.size == 0 ||
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objfile->static_psymbols.size == 0)
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init_psymbol_list (objfile, DBX_SYMCOUNT (objfile));
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pending_blocks = 0;
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back_to = make_cleanup (really_free_pendings, 0);
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make_cleanup (discard_minimal_symbols, 0);
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read_minimal_symbols (objfile, section_offsets);
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/* Now that the symbol table data of the executable file are all in core,
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process them and define symbols accordingly. */
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read_os9k_psymtab (section_offsets, objfile,
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DBX_TEXT_ADDR (objfile),
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DBX_TEXT_SIZE (objfile));
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do_cleanups (back_to);
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}
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/* Initialize anything that needs initializing when a completely new
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symbol file is specified (not just adding some symbols from another
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file, e.g. a shared library). */
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static void
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os9k_new_init (ignore)
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struct objfile *ignore;
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{
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stabsread_new_init ();
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buildsym_new_init ();
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psymfile_depth = 0;
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/*
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init_header_files ();
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*/
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}
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/* os9k_symfile_init ()
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It is passed a struct objfile which contains, among other things,
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the BFD for the file whose symbols are being read, and a slot for a pointer
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to "private data" which we fill with goodies.
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Since BFD doesn't know how to read debug symbols in a format-independent
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way (and may never do so...), we have to do it ourselves. We will never
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be called unless this is an a.out (or very similar) file.
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FIXME, there should be a cleaner peephole into the BFD environment here. */
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static void
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os9k_symfile_init (objfile)
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struct objfile *objfile;
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{
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bfd *sym_bfd = objfile->obfd;
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char *name = bfd_get_filename (sym_bfd);
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char dbgname[512], stbname[512];
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FILE *symfile = 0;
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FILE *minfile = 0;
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asection *text_sect;
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strcpy(dbgname, name);
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strcat(dbgname, ".dbg");
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strcpy(stbname, name);
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strcat(stbname, ".stb");
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if ((symfile = fopen(dbgname, "r")) == NULL) {
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warning("Symbol file %s not found", dbgname);
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}
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objfile->auxf2 = symfile;
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if ((minfile = fopen(stbname, "r")) == NULL) {
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warning("Symbol file %s not found", stbname);
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}
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objfile->auxf1 = minfile;
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/* Allocate struct to keep track of the symfile */
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objfile->sym_stab_info = (PTR)
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xmmalloc (objfile -> md, sizeof (struct dbx_symfile_info));
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DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL;
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||
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text_sect = bfd_get_section_by_name (sym_bfd, ".text");
|
||
if (!text_sect)
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error ("Can't find .text section in file");
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||
DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
|
||
DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);
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||
|
||
DBX_SYMBOL_SIZE (objfile) = 0; /* variable size symbol */
|
||
DBX_SYMCOUNT (objfile) = 0; /* used to be bfd_get_symcount(sym_bfd) */
|
||
DBX_SYMTAB_OFFSET (objfile) = 0; /* used to be SYMBOL_TABLE_OFFSET */
|
||
}
|
||
|
||
/* Perform any local cleanups required when we are done with a particular
|
||
objfile. I.E, we are in the process of discarding all symbol information
|
||
for an objfile, freeing up all memory held for it, and unlinking the
|
||
objfile struct from the global list of known objfiles. */
|
||
|
||
static void
|
||
os9k_symfile_finish (objfile)
|
||
struct objfile *objfile;
|
||
{
|
||
if (objfile->sym_stab_info != NULL)
|
||
{
|
||
mfree (objfile -> md, objfile->sym_stab_info);
|
||
}
|
||
/*
|
||
free_header_files ();
|
||
*/
|
||
}
|
||
|
||
|
||
struct st_dbghdr {
|
||
int sync;
|
||
short rev;
|
||
int crc;
|
||
short os;
|
||
short cpu;
|
||
};
|
||
#define SYNC (int)0xefbefeca
|
||
|
||
#define SWAP_DBGHDR(hdrp, abfd) \
|
||
{ \
|
||
(hdrp)->sync = bfd_get_32(abfd, (unsigned char *)&(hdrp)->sync); \
|
||
(hdrp)->rev = bfd_get_16(abfd, (unsigned char *)&(hdrp)->rev); \
|
||
(hdrp)->crc = bfd_get_32(abfd, (unsigned char *)&(hdrp)->crc); \
|
||
(hdrp)->os = bfd_get_16(abfd, (unsigned char *)&(hdrp)->os); \
|
||
(hdrp)->cpu = bfd_get_16(abfd, (unsigned char *)&(hdrp)->cpu); \
|
||
}
|
||
|
||
#define N_SYM_CMPLR 0
|
||
#define N_SYM_SLINE 1
|
||
#define N_SYM_SYM 2
|
||
#define N_SYM_LBRAC 3
|
||
#define N_SYM_RBRAC 4
|
||
#define N_SYM_SE 5
|
||
|
||
struct internal_symstruct {
|
||
short n_type;
|
||
short n_desc;
|
||
long n_value;
|
||
char * n_strx;
|
||
};
|
||
static struct internal_symstruct symbol;
|
||
static struct internal_symstruct *symbuf = &symbol;
|
||
static char strbuf[4096];
|
||
static struct st_dbghdr dbghdr;
|
||
static short cmplrid;
|
||
|
||
#define VER_PRE_ULTRAC ((short)4)
|
||
#define VER_ULTRAC ((short)5)
|
||
|
||
static int
|
||
fill_sym (dbg_file, abfd)
|
||
FILE *dbg_file;
|
||
bfd *abfd;
|
||
{
|
||
short si, nmask;
|
||
long li;
|
||
int ii;
|
||
char *p;
|
||
|
||
int nbytes = fread(&si, sizeof(si), 1, dbg_file);
|
||
if (nbytes == 0)
|
||
return 0;
|
||
if (nbytes < 0)
|
||
perror_with_name ("reading .dbg file.");
|
||
symbuf->n_desc = 0;
|
||
symbuf->n_value = 0;
|
||
symbuf->n_strx = NULL;
|
||
symbuf->n_type = bfd_get_16 (abfd, (unsigned char *)&si);
|
||
symbuf->n_type = 0xf & symbuf->n_type;
|
||
switch (symbuf->n_type)
|
||
{
|
||
case N_SYM_CMPLR:
|
||
fread(&si, sizeof(si), 1, dbg_file);
|
||
symbuf->n_desc = bfd_get_16(abfd, (unsigned char *)&si);
|
||
cmplrid = symbuf->n_desc & 0xff;
|
||
break;
|
||
case N_SYM_SLINE:
|
||
fread(&li, sizeof(li), 1, dbg_file);
|
||
symbuf->n_value = bfd_get_32(abfd, (unsigned char *)&li);
|
||
fread(&li, sizeof(li), 1, dbg_file);
|
||
li = bfd_get_32(abfd, (unsigned char *)&li);
|
||
symbuf->n_strx = (char *)(li >> 12);
|
||
symbuf->n_desc = li & 0xfff;
|
||
break;
|
||
case N_SYM_SYM:
|
||
fread(&li, sizeof(li), 1, dbg_file);
|
||
symbuf->n_value = bfd_get_32(abfd, (unsigned char *)&li);
|
||
si = 0;
|
||
do {
|
||
ii = getc(dbg_file);
|
||
strbuf[si++] = (char) ii;
|
||
} while (ii != 0 || si % 2 != 0);
|
||
symbuf->n_strx = strbuf;
|
||
p = (char *) strchr (strbuf, ':');
|
||
if (!p) break;
|
||
if ((p[1] == 'F' || p[1] == 'f') && cmplrid == VER_PRE_ULTRAC)
|
||
{
|
||
fread(&si, sizeof(si), 1, dbg_file);
|
||
nmask = bfd_get_16(abfd, (unsigned char *)&si);
|
||
for (ii=0; ii<nmask; ii++)
|
||
fread(&si, sizeof(si), 1, dbg_file);
|
||
}
|
||
break;
|
||
case N_SYM_LBRAC:
|
||
fread(&li, sizeof(li), 1, dbg_file);
|
||
symbuf->n_value = bfd_get_32(abfd, (unsigned char *)&li);
|
||
break;
|
||
case N_SYM_RBRAC:
|
||
fread(&li, sizeof(li), 1, dbg_file);
|
||
symbuf->n_value = bfd_get_32(abfd, (unsigned char *)&li);
|
||
break;
|
||
case N_SYM_SE:
|
||
break;
|
||
}
|
||
return 1;
|
||
}
|
||
|
||
/* Given pointers to an a.out symbol table in core containing dbx
|
||
style data, setup partial_symtab's describing each source file for
|
||
which debugging information is available.
|
||
SYMFILE_NAME is the name of the file we are reading from
|
||
and SECTION_OFFSETS is the set of offsets for the various sections
|
||
of the file (a set of zeros if the mainline program). */
|
||
|
||
static void
|
||
read_os9k_psymtab (section_offsets, objfile, text_addr, text_size)
|
||
struct section_offsets *section_offsets;
|
||
struct objfile *objfile;
|
||
CORE_ADDR text_addr;
|
||
int text_size;
|
||
{
|
||
register struct internal_symstruct *bufp = 0; /* =0 avoids gcc -Wall glitch*/
|
||
register char *namestring;
|
||
int past_first_source_file = 0;
|
||
CORE_ADDR last_o_file_start = 0;
|
||
#if 0
|
||
struct cleanup *back_to;
|
||
#endif
|
||
bfd *abfd;
|
||
FILE *fp;
|
||
|
||
/* End of the text segment of the executable file. */
|
||
static CORE_ADDR end_of_text_addr;
|
||
|
||
/* Current partial symtab */
|
||
static struct partial_symtab *pst = 0;
|
||
|
||
/* List of current psymtab's include files */
|
||
char **psymtab_include_list;
|
||
int includes_allocated;
|
||
int includes_used;
|
||
|
||
/* Index within current psymtab dependency list */
|
||
struct partial_symtab **dependency_list;
|
||
int dependencies_used, dependencies_allocated;
|
||
|
||
includes_allocated = 30;
|
||
includes_used = 0;
|
||
psymtab_include_list = (char **) alloca (includes_allocated *
|
||
sizeof (char *));
|
||
|
||
dependencies_allocated = 30;
|
||
dependencies_used = 0;
|
||
dependency_list =
|
||
(struct partial_symtab **) alloca (dependencies_allocated *
|
||
sizeof (struct partial_symtab *));
|
||
|
||
last_source_file = NULL;
|
||
|
||
#ifdef END_OF_TEXT_DEFAULT
|
||
end_of_text_addr = END_OF_TEXT_DEFAULT;
|
||
#else
|
||
end_of_text_addr = text_addr + section_offsets->offsets[SECT_OFF_TEXT]
|
||
+ text_size; /* Relocate */
|
||
#endif
|
||
|
||
abfd = objfile->obfd;
|
||
fp = objfile->auxf2;
|
||
if (!fp) return;
|
||
|
||
fread(&dbghdr.sync, sizeof(dbghdr.sync), 1, fp);
|
||
fread(&dbghdr.rev, sizeof(dbghdr.rev), 1, fp);
|
||
fread(&dbghdr.crc, sizeof(dbghdr.crc), 1, fp);
|
||
fread(&dbghdr.os, sizeof(dbghdr.os), 1, fp);
|
||
fread(&dbghdr.cpu, sizeof(dbghdr.cpu), 1, fp);
|
||
SWAP_DBGHDR(&dbghdr, abfd);
|
||
|
||
symnum = 0;
|
||
while(1)
|
||
{
|
||
int ret;
|
||
long cursymoffset;
|
||
|
||
/* Get the symbol for this run and pull out some info */
|
||
QUIT; /* allow this to be interruptable */
|
||
cursymoffset = ftell(objfile->auxf2);
|
||
ret = fill_sym(objfile->auxf2, abfd);
|
||
if (ret <= 0) break;
|
||
else symnum++;
|
||
bufp = symbuf;
|
||
|
||
/* Special case to speed up readin. */
|
||
if (bufp->n_type == (short)N_SYM_SLINE) continue;
|
||
|
||
#define CUR_SYMBOL_VALUE bufp->n_value
|
||
/* partial-stab.h */
|
||
|
||
switch (bufp->n_type)
|
||
{
|
||
char *p;
|
||
|
||
case N_SYM_CMPLR:
|
||
continue;
|
||
|
||
case N_SYM_SE:
|
||
CUR_SYMBOL_VALUE += ANOFFSET(section_offsets, SECT_OFF_TEXT);
|
||
if (psymfile_depth == 1 && pst)
|
||
{
|
||
os9k_end_psymtab (pst, psymtab_include_list, includes_used,
|
||
symnum, CUR_SYMBOL_VALUE,
|
||
dependency_list, dependencies_used);
|
||
pst = (struct partial_symtab *) 0;
|
||
includes_used = 0;
|
||
dependencies_used = 0;
|
||
}
|
||
psymfile_depth--;
|
||
continue;
|
||
|
||
case N_SYM_SYM: /* Typedef or automatic variable. */
|
||
namestring = bufp->n_strx;
|
||
p = (char *) strchr (namestring, ':');
|
||
if (!p)
|
||
continue; /* Not a debugging symbol. */
|
||
|
||
/* Main processing section for debugging symbols which
|
||
the initial read through the symbol tables needs to worry
|
||
about. If we reach this point, the symbol which we are
|
||
considering is definitely one we are interested in.
|
||
p must also contain the (valid) index into the namestring
|
||
which indicates the debugging type symbol. */
|
||
|
||
switch (p[1])
|
||
{
|
||
case 'S' :
|
||
{
|
||
unsigned long valu;
|
||
enum language tmp_language;
|
||
char *str, *p;
|
||
int n;
|
||
|
||
valu = CUR_SYMBOL_VALUE;
|
||
if (valu)
|
||
valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
|
||
past_first_source_file = 1;
|
||
|
||
p = strchr(namestring, ':');
|
||
if (p) n = p-namestring;
|
||
else n = strlen(namestring);
|
||
str = alloca(n+1);
|
||
strncpy(str, namestring, n);
|
||
str[n] = '\0';
|
||
|
||
if (psymfile_depth == 0) {
|
||
if (!pst)
|
||
pst = os9k_start_psymtab (objfile, section_offsets,
|
||
str, valu,
|
||
cursymoffset,
|
||
symnum-1,
|
||
objfile -> global_psymbols.next,
|
||
objfile -> static_psymbols.next);
|
||
} else { /* this is a include file */
|
||
tmp_language = deduce_language_from_filename (str);
|
||
if (tmp_language != language_unknown
|
||
&& (tmp_language != language_c
|
||
|| psymtab_language != language_cplus))
|
||
psymtab_language = tmp_language;
|
||
|
||
/*
|
||
if (pst && STREQ (str, pst->filename))
|
||
continue;
|
||
{
|
||
register int i;
|
||
for (i = 0; i < includes_used; i++)
|
||
if (STREQ (str, psymtab_include_list[i]))
|
||
{
|
||
i = -1;
|
||
break;
|
||
}
|
||
if (i == -1)
|
||
continue;
|
||
}
|
||
*/
|
||
|
||
psymtab_include_list[includes_used++] = str;
|
||
if (includes_used >= includes_allocated)
|
||
{
|
||
char **orig = psymtab_include_list;
|
||
|
||
psymtab_include_list = (char **)
|
||
alloca ((includes_allocated *= 2) * sizeof (char *));
|
||
memcpy ((PTR)psymtab_include_list, (PTR)orig,
|
||
includes_used * sizeof (char *));
|
||
}
|
||
|
||
}
|
||
psymfile_depth++;
|
||
continue;
|
||
}
|
||
|
||
case 'v':
|
||
add_psymbol_to_list (namestring, p - namestring,
|
||
VAR_NAMESPACE, LOC_STATIC,
|
||
&objfile->static_psymbols,
|
||
0, CUR_SYMBOL_VALUE,
|
||
psymtab_language, objfile);
|
||
continue;
|
||
case 'V':
|
||
add_psymbol_to_list (namestring, p - namestring,
|
||
VAR_NAMESPACE, LOC_STATIC,
|
||
&objfile->global_psymbols,
|
||
0, CUR_SYMBOL_VALUE,
|
||
psymtab_language, objfile);
|
||
continue;
|
||
|
||
case 'T':
|
||
if (p != namestring) /* a name is there, not just :T... */
|
||
{
|
||
add_psymbol_to_list (namestring, p - namestring,
|
||
STRUCT_NAMESPACE, LOC_TYPEDEF,
|
||
&objfile->static_psymbols,
|
||
CUR_SYMBOL_VALUE, 0,
|
||
psymtab_language, objfile);
|
||
if (p[2] == 't')
|
||
{
|
||
/* Also a typedef with the same name. */
|
||
add_psymbol_to_list (namestring, p - namestring,
|
||
VAR_NAMESPACE, LOC_TYPEDEF,
|
||
&objfile->static_psymbols,
|
||
CUR_SYMBOL_VALUE, 0, psymtab_language,
|
||
objfile);
|
||
p += 1;
|
||
}
|
||
/* The semantics of C++ state that "struct foo { ... }"
|
||
also defines a typedef for "foo". Unfortuantely, cfront
|
||
never makes the typedef when translating from C++ to C.
|
||
We make the typedef here so that "ptype foo" works as
|
||
expected for cfront translated code. */
|
||
else if (psymtab_language == language_cplus)
|
||
{
|
||
/* Also a typedef with the same name. */
|
||
add_psymbol_to_list (namestring, p - namestring,
|
||
VAR_NAMESPACE, LOC_TYPEDEF,
|
||
&objfile->static_psymbols,
|
||
CUR_SYMBOL_VALUE, 0, psymtab_language,
|
||
objfile);
|
||
}
|
||
}
|
||
goto check_enum;
|
||
case 't':
|
||
if (p != namestring) /* a name is there, not just :T... */
|
||
{
|
||
add_psymbol_to_list (namestring, p - namestring,
|
||
VAR_NAMESPACE, LOC_TYPEDEF,
|
||
&objfile->static_psymbols,
|
||
CUR_SYMBOL_VALUE, 0,
|
||
psymtab_language, objfile);
|
||
}
|
||
check_enum:
|
||
/* If this is an enumerated type, we need to
|
||
add all the enum constants to the partial symbol
|
||
table. This does not cover enums without names, e.g.
|
||
"enum {a, b} c;" in C, but fortunately those are
|
||
rare. There is no way for GDB to find those from the
|
||
enum type without spending too much time on it. Thus
|
||
to solve this problem, the compiler needs to put out the
|
||
enum in a nameless type. GCC2 does this. */
|
||
|
||
/* We are looking for something of the form
|
||
<name> ":" ("t" | "T") [<number> "="] "e" <size>
|
||
{<constant> ":" <value> ","} ";". */
|
||
|
||
/* Skip over the colon and the 't' or 'T'. */
|
||
p += 2;
|
||
/* This type may be given a number. Also, numbers can come
|
||
in pairs like (0,26). Skip over it. */
|
||
while ((*p >= '0' && *p <= '9')
|
||
|| *p == '(' || *p == ',' || *p == ')'
|
||
|| *p == '=')
|
||
p++;
|
||
|
||
if (*p++ == 'e')
|
||
{
|
||
/* We have found an enumerated type. skip size */
|
||
while (*p >= '0' && *p <= '9') p++;
|
||
/* According to comments in read_enum_type
|
||
a comma could end it instead of a semicolon.
|
||
I don't know where that happens.
|
||
Accept either. */
|
||
while (*p && *p != ';' && *p != ',')
|
||
{
|
||
char *q;
|
||
|
||
/* Check for and handle cretinous dbx symbol name
|
||
continuation!
|
||
if (*p == '\\')
|
||
p = next_symbol_text (objfile);
|
||
*/
|
||
|
||
/* Point to the character after the name
|
||
of the enum constant. */
|
||
for (q = p; *q && *q != ':'; q++)
|
||
;
|
||
/* Note that the value doesn't matter for
|
||
enum constants in psymtabs, just in symtabs. */
|
||
add_psymbol_to_list (p, q - p,
|
||
VAR_NAMESPACE, LOC_CONST,
|
||
&objfile->static_psymbols, 0,
|
||
0, psymtab_language, objfile);
|
||
/* Point past the name. */
|
||
p = q;
|
||
/* Skip over the value. */
|
||
while (*p && *p != ',')
|
||
p++;
|
||
/* Advance past the comma. */
|
||
if (*p)
|
||
p++;
|
||
}
|
||
}
|
||
continue;
|
||
case 'c':
|
||
/* Constant, e.g. from "const" in Pascal. */
|
||
add_psymbol_to_list (namestring, p - namestring,
|
||
VAR_NAMESPACE, LOC_CONST,
|
||
&objfile->static_psymbols, CUR_SYMBOL_VALUE,
|
||
0, psymtab_language, objfile);
|
||
continue;
|
||
|
||
case 'f':
|
||
CUR_SYMBOL_VALUE += ANOFFSET(section_offsets, SECT_OFF_TEXT);
|
||
if (pst && pst->textlow == 0)
|
||
pst->textlow = CUR_SYMBOL_VALUE;
|
||
|
||
add_psymbol_to_list (namestring, p - namestring,
|
||
VAR_NAMESPACE, LOC_BLOCK,
|
||
&objfile->static_psymbols, CUR_SYMBOL_VALUE,
|
||
0, psymtab_language, objfile);
|
||
continue;
|
||
|
||
case 'F':
|
||
CUR_SYMBOL_VALUE += ANOFFSET(section_offsets, SECT_OFF_TEXT);
|
||
if (pst && pst->textlow == 0)
|
||
pst->textlow = CUR_SYMBOL_VALUE;
|
||
|
||
add_psymbol_to_list (namestring, p - namestring,
|
||
VAR_NAMESPACE, LOC_BLOCK,
|
||
&objfile->global_psymbols, CUR_SYMBOL_VALUE,
|
||
0, psymtab_language, objfile);
|
||
continue;
|
||
|
||
case 'p':
|
||
case 'l':
|
||
case 's':
|
||
continue;
|
||
|
||
case ':':
|
||
/* It is a C++ nested symbol. We don't need to record it
|
||
(I don't think); if we try to look up foo::bar::baz,
|
||
then symbols for the symtab containing foo should get
|
||
read in, I think. */
|
||
/* Someone says sun cc puts out symbols like
|
||
/foo/baz/maclib::/usr/local/bin/maclib,
|
||
which would get here with a symbol type of ':'. */
|
||
continue;
|
||
|
||
default:
|
||
/* Unexpected symbol descriptor. The second and subsequent stabs
|
||
of a continued stab can show up here. The question is
|
||
whether they ever can mimic a normal stab--it would be
|
||
nice if not, since we certainly don't want to spend the
|
||
time searching to the end of every string looking for
|
||
a backslash. */
|
||
|
||
complain (&unknown_symchar_complaint, p[1]);
|
||
continue;
|
||
}
|
||
|
||
case N_SYM_RBRAC:
|
||
CUR_SYMBOL_VALUE += ANOFFSET(section_offsets, SECT_OFF_TEXT);
|
||
#ifdef HANDLE_RBRAC
|
||
HANDLE_RBRAC(CUR_SYMBOL_VALUE);
|
||
continue;
|
||
#endif
|
||
case N_SYM_LBRAC:
|
||
continue;
|
||
|
||
default:
|
||
/* If we haven't found it yet, ignore it. It's probably some
|
||
new type we don't know about yet. */
|
||
complain (&unknown_symtype_complaint,
|
||
local_hex_string ((unsigned long) bufp->n_type));
|
||
continue;
|
||
}
|
||
}
|
||
|
||
DBX_SYMCOUNT (objfile) = symnum;
|
||
|
||
/* If there's stuff to be cleaned up, clean it up. */
|
||
if (DBX_SYMCOUNT (objfile) > 0
|
||
/*FIXME, does this have a bug at start address 0? */
|
||
&& last_o_file_start
|
||
&& objfile -> ei.entry_point < bufp->n_value
|
||
&& objfile -> ei.entry_point >= last_o_file_start)
|
||
{
|
||
objfile -> ei.entry_file_lowpc = last_o_file_start;
|
||
objfile -> ei.entry_file_highpc = bufp->n_value;
|
||
}
|
||
|
||
if (pst)
|
||
{
|
||
os9k_end_psymtab (pst, psymtab_include_list, includes_used,
|
||
symnum, end_of_text_addr,
|
||
dependency_list, dependencies_used);
|
||
}
|
||
/*
|
||
do_cleanups (back_to);
|
||
*/
|
||
}
|
||
|
||
/* Allocate and partially fill a partial symtab. It will be
|
||
completely filled at the end of the symbol list.
|
||
|
||
SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
|
||
is the address relative to which its symbols are (incremental) or 0
|
||
(normal). */
|
||
|
||
|
||
static struct partial_symtab *
|
||
os9k_start_psymtab (objfile, section_offsets,
|
||
filename, textlow, ldsymoff,ldsymcnt, global_syms, static_syms)
|
||
struct objfile *objfile;
|
||
struct section_offsets *section_offsets;
|
||
char *filename;
|
||
CORE_ADDR textlow;
|
||
int ldsymoff;
|
||
int ldsymcnt;
|
||
struct partial_symbol **global_syms;
|
||
struct partial_symbol **static_syms;
|
||
{
|
||
struct partial_symtab *result =
|
||
start_psymtab_common(objfile, section_offsets,
|
||
filename, textlow, global_syms, static_syms);
|
||
|
||
result->read_symtab_private = (char *)
|
||
obstack_alloc (&objfile -> psymbol_obstack, sizeof (struct symloc));
|
||
|
||
LDSYMOFF(result) = ldsymoff;
|
||
LDSYMCNT(result) = ldsymcnt;
|
||
result->read_symtab = os9k_psymtab_to_symtab;
|
||
|
||
/* Deduce the source language from the filename for this psymtab. */
|
||
psymtab_language = deduce_language_from_filename (filename);
|
||
return result;
|
||
}
|
||
|
||
/* Close off the current usage of PST.
|
||
Returns PST or NULL if the partial symtab was empty and thrown away.
|
||
FIXME: List variables and peculiarities of same. */
|
||
|
||
static struct partial_symtab *
|
||
os9k_end_psymtab (pst, include_list, num_includes, capping_symbol_cnt,
|
||
capping_text, dependency_list, number_dependencies)
|
||
struct partial_symtab *pst;
|
||
char **include_list;
|
||
int num_includes;
|
||
int capping_symbol_cnt;
|
||
CORE_ADDR capping_text;
|
||
struct partial_symtab **dependency_list;
|
||
int number_dependencies;
|
||
/* struct partial_symbol *capping_global, *capping_static;*/
|
||
{
|
||
int i;
|
||
struct partial_symtab *p1;
|
||
struct objfile *objfile = pst -> objfile;
|
||
|
||
if (capping_symbol_cnt != -1)
|
||
LDSYMCNT(pst) = capping_symbol_cnt - LDSYMCNT(pst);
|
||
|
||
/* Under Solaris, the N_SO symbols always have a value of 0,
|
||
instead of the usual address of the .o file. Therefore,
|
||
we have to do some tricks to fill in texthigh and textlow.
|
||
The first trick is in partial-stab.h: if we see a static
|
||
or global function, and the textlow for the current pst
|
||
is still 0, then we use that function's address for
|
||
the textlow of the pst.
|
||
|
||
Now, to fill in texthigh, we remember the last function seen
|
||
in the .o file (also in partial-stab.h). Also, there's a hack in
|
||
bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
|
||
to here via the misc_info field. Therefore, we can fill in
|
||
a reliable texthigh by taking the address plus size of the
|
||
last function in the file.
|
||
|
||
Unfortunately, that does not cover the case where the last function
|
||
in the file is static. See the paragraph below for more comments
|
||
on this situation.
|
||
|
||
Finally, if we have a valid textlow for the current file, we run
|
||
down the partial_symtab_list filling in previous texthighs that
|
||
are still unknown. */
|
||
|
||
if (pst->texthigh == 0 && last_function_name) {
|
||
char *p;
|
||
int n;
|
||
struct minimal_symbol *minsym;
|
||
|
||
p = strchr (last_function_name, ':');
|
||
if (p == NULL)
|
||
p = last_function_name;
|
||
n = p - last_function_name;
|
||
p = alloca (n + 1);
|
||
strncpy (p, last_function_name, n);
|
||
p[n] = 0;
|
||
|
||
minsym = lookup_minimal_symbol (p, NULL, objfile);
|
||
|
||
if (minsym) {
|
||
pst->texthigh = SYMBOL_VALUE_ADDRESS(minsym)+(long)MSYMBOL_INFO(minsym);
|
||
} else {
|
||
/* This file ends with a static function, and it's
|
||
difficult to imagine how hard it would be to track down
|
||
the elf symbol. Luckily, most of the time no one will notice,
|
||
since the next file will likely be compiled with -g, so
|
||
the code below will copy the first fuction's start address
|
||
back to our texthigh variable. (Also, if this file is the
|
||
last one in a dynamically linked program, texthigh already
|
||
has the right value.) If the next file isn't compiled
|
||
with -g, then the last function in this file winds up owning
|
||
all of the text space up to the next -g file, or the end (minus
|
||
shared libraries). This only matters for single stepping,
|
||
and even then it will still work, except that it will single
|
||
step through all of the covered functions, instead of setting
|
||
breakpoints around them as it usualy does. This makes it
|
||
pretty slow, but at least it doesn't fail.
|
||
|
||
We can fix this with a fairly big change to bfd, but we need
|
||
to coordinate better with Cygnus if we want to do that. FIXME. */
|
||
}
|
||
last_function_name = NULL;
|
||
}
|
||
|
||
/* this test will be true if the last .o file is only data */
|
||
if (pst->textlow == 0)
|
||
pst->textlow = pst->texthigh;
|
||
|
||
/* If we know our own starting text address, then walk through all other
|
||
psymtabs for this objfile, and if any didn't know their ending text
|
||
address, set it to our starting address. Take care to not set our
|
||
own ending address to our starting address, nor to set addresses on
|
||
`dependency' files that have both textlow and texthigh zero. */
|
||
if (pst->textlow) {
|
||
ALL_OBJFILE_PSYMTABS (objfile, p1) {
|
||
if (p1->texthigh == 0 && p1->textlow != 0 && p1 != pst) {
|
||
p1->texthigh = pst->textlow;
|
||
/* if this file has only data, then make textlow match texthigh */
|
||
if (p1->textlow == 0)
|
||
p1->textlow = p1->texthigh;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* End of kludge for patching Solaris textlow and texthigh. */
|
||
|
||
pst->n_global_syms =
|
||
objfile->global_psymbols.next - (objfile->global_psymbols.list + pst->globals_offset);
|
||
pst->n_static_syms =
|
||
objfile->static_psymbols.next - (objfile->static_psymbols.list + pst->statics_offset);
|
||
|
||
pst->number_of_dependencies = number_dependencies;
|
||
if (number_dependencies)
|
||
{
|
||
pst->dependencies = (struct partial_symtab **)
|
||
obstack_alloc (&objfile->psymbol_obstack,
|
||
number_dependencies * sizeof (struct partial_symtab *));
|
||
memcpy (pst->dependencies, dependency_list,
|
||
number_dependencies * sizeof (struct partial_symtab *));
|
||
}
|
||
else
|
||
pst->dependencies = 0;
|
||
|
||
for (i = 0; i < num_includes; i++)
|
||
{
|
||
struct partial_symtab *subpst =
|
||
allocate_psymtab (include_list[i], objfile);
|
||
|
||
subpst->section_offsets = pst->section_offsets;
|
||
subpst->read_symtab_private =
|
||
(char *) obstack_alloc (&objfile->psymbol_obstack,
|
||
sizeof (struct symloc));
|
||
LDSYMOFF(subpst) =
|
||
LDSYMCNT(subpst) =
|
||
subpst->textlow =
|
||
subpst->texthigh = 0;
|
||
|
||
/* We could save slight bits of space by only making one of these,
|
||
shared by the entire set of include files. FIXME-someday. */
|
||
subpst->dependencies = (struct partial_symtab **)
|
||
obstack_alloc (&objfile->psymbol_obstack,
|
||
sizeof (struct partial_symtab *));
|
||
subpst->dependencies[0] = pst;
|
||
subpst->number_of_dependencies = 1;
|
||
|
||
subpst->globals_offset =
|
||
subpst->n_global_syms =
|
||
subpst->statics_offset =
|
||
subpst->n_static_syms = 0;
|
||
|
||
subpst->readin = 0;
|
||
subpst->symtab = 0;
|
||
subpst->read_symtab = pst->read_symtab;
|
||
}
|
||
|
||
sort_pst_symbols (pst);
|
||
|
||
/* If there is already a psymtab or symtab for a file of this name,
|
||
remove it.
|
||
(If there is a symtab, more drastic things also happen.)
|
||
This happens in VxWorks. */
|
||
free_named_symtabs (pst->filename);
|
||
|
||
if (num_includes == 0
|
||
&& number_dependencies == 0
|
||
&& pst->n_global_syms == 0
|
||
&& pst->n_static_syms == 0) {
|
||
/* Throw away this psymtab, it's empty. We can't deallocate it, since
|
||
it is on the obstack, but we can forget to chain it on the list. */
|
||
struct partial_symtab *prev_pst;
|
||
|
||
/* First, snip it out of the psymtab chain */
|
||
|
||
if (pst->objfile->psymtabs == pst)
|
||
pst->objfile->psymtabs = pst->next;
|
||
else
|
||
for (prev_pst = pst->objfile->psymtabs; prev_pst; prev_pst = pst->next)
|
||
if (prev_pst->next == pst)
|
||
prev_pst->next = pst->next;
|
||
|
||
/* Next, put it on a free list for recycling */
|
||
pst->next = pst->objfile->free_psymtabs;
|
||
pst->objfile->free_psymtabs = pst;
|
||
|
||
/* Indicate that psymtab was thrown away. */
|
||
pst = (struct partial_symtab *)NULL;
|
||
}
|
||
return pst;
|
||
}
|
||
|
||
static void
|
||
os9k_psymtab_to_symtab_1 (pst)
|
||
struct partial_symtab *pst;
|
||
{
|
||
struct cleanup *old_chain;
|
||
int i;
|
||
|
||
if (!pst)
|
||
return;
|
||
|
||
if (pst->readin)
|
||
{
|
||
fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
|
||
pst->filename);
|
||
return;
|
||
}
|
||
|
||
/* Read in all partial symtabs on which this one is dependent */
|
||
for (i = 0; i < pst->number_of_dependencies; i++)
|
||
if (!pst->dependencies[i]->readin)
|
||
{
|
||
/* Inform about additional files that need to be read in. */
|
||
if (info_verbose)
|
||
{
|
||
fputs_filtered (" ", gdb_stdout);
|
||
wrap_here ("");
|
||
fputs_filtered ("and ", gdb_stdout);
|
||
wrap_here ("");
|
||
printf_filtered ("%s...", pst->dependencies[i]->filename);
|
||
wrap_here (""); /* Flush output */
|
||
gdb_flush (gdb_stdout);
|
||
}
|
||
os9k_psymtab_to_symtab_1 (pst->dependencies[i]);
|
||
}
|
||
|
||
if (LDSYMCNT(pst)) /* Otherwise it's a dummy */
|
||
{
|
||
/* Init stuff necessary for reading in symbols */
|
||
stabsread_init ();
|
||
buildsym_init ();
|
||
old_chain = make_cleanup (really_free_pendings, 0);
|
||
|
||
/* Read in this file's symbols */
|
||
os9k_read_ofile_symtab (pst);
|
||
sort_symtab_syms (pst->symtab);
|
||
do_cleanups (old_chain);
|
||
}
|
||
|
||
pst->readin = 1;
|
||
}
|
||
|
||
/* Read in all of the symbols for a given psymtab for real.
|
||
Be verbose about it if the user wants that. */
|
||
|
||
static void
|
||
os9k_psymtab_to_symtab (pst)
|
||
struct partial_symtab *pst;
|
||
{
|
||
bfd *sym_bfd;
|
||
|
||
if (!pst)
|
||
return;
|
||
|
||
if (pst->readin)
|
||
{
|
||
fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
|
||
pst->filename);
|
||
return;
|
||
}
|
||
|
||
if (LDSYMCNT(pst) || pst->number_of_dependencies)
|
||
{
|
||
/* Print the message now, before reading the string table,
|
||
to avoid disconcerting pauses. */
|
||
if (info_verbose)
|
||
{
|
||
printf_filtered ("Reading in symbols for %s...", pst->filename);
|
||
gdb_flush (gdb_stdout);
|
||
}
|
||
|
||
sym_bfd = pst->objfile->obfd;
|
||
os9k_psymtab_to_symtab_1 (pst);
|
||
|
||
/* Match with global symbols. This only needs to be done once,
|
||
after all of the symtabs and dependencies have been read in. */
|
||
scan_file_globals (pst->objfile);
|
||
|
||
/* Finish up the debug error message. */
|
||
if (info_verbose)
|
||
printf_filtered ("done.\n");
|
||
}
|
||
}
|
||
|
||
/* Read in a defined section of a specific object file's symbols. */
|
||
static void
|
||
os9k_read_ofile_symtab (pst)
|
||
struct partial_symtab *pst;
|
||
{
|
||
register struct internal_symstruct *bufp;
|
||
unsigned char type;
|
||
unsigned max_symnum;
|
||
register bfd *abfd;
|
||
struct objfile *objfile;
|
||
int sym_offset; /* Offset to start of symbols to read */
|
||
CORE_ADDR text_offset; /* Start of text segment for symbols */
|
||
int text_size; /* Size of text segment for symbols */
|
||
struct section_offsets *section_offsets;
|
||
FILE *dbg_file;
|
||
|
||
objfile = pst->objfile;
|
||
sym_offset = LDSYMOFF(pst);
|
||
max_symnum = LDSYMCNT(pst);
|
||
text_offset = pst->textlow;
|
||
text_size = pst->texthigh - pst->textlow;
|
||
section_offsets = pst->section_offsets;
|
||
|
||
current_objfile = objfile;
|
||
subfile_stack = NULL;
|
||
last_source_file = NULL;
|
||
|
||
abfd = objfile->obfd;
|
||
dbg_file = objfile->auxf2;
|
||
|
||
#if 0
|
||
/* It is necessary to actually read one symbol *before* the start
|
||
of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
|
||
occurs before the N_SO symbol.
|
||
Detecting this in read_dbx_symtab
|
||
would slow down initial readin, so we look for it here instead. */
|
||
if (!processing_acc_compilation && sym_offset >= (int)symbol_size)
|
||
{
|
||
fseek (objefile->auxf2, sym_offset, SEEK_CUR);
|
||
fill_sym(objfile->auxf2, abfd);
|
||
bufp = symbuf;
|
||
|
||
processing_gcc_compilation = 0;
|
||
if (bufp->n_type == N_TEXT)
|
||
{
|
||
if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL))
|
||
processing_gcc_compilation = 1;
|
||
else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL))
|
||
processing_gcc_compilation = 2;
|
||
}
|
||
|
||
/* Try to select a C++ demangling based on the compilation unit
|
||
producer. */
|
||
|
||
if (processing_gcc_compilation)
|
||
{
|
||
if (AUTO_DEMANGLING)
|
||
{
|
||
set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* The N_SO starting this symtab is the first symbol, so we
|
||
better not check the symbol before it. I'm not this can
|
||
happen, but it doesn't hurt to check for it. */
|
||
bfd_seek (symfile_bfd, sym_offset, SEEK_CUR);
|
||
processing_gcc_compilation = 0;
|
||
}
|
||
#endif /* 0 */
|
||
|
||
fseek(dbg_file, (long)sym_offset, 0);
|
||
/*
|
||
if (bufp->n_type != (unsigned char)N_SYM_SYM)
|
||
error("First symbol in segment of executable not a source symbol");
|
||
*/
|
||
|
||
for (symnum = 0; symnum < max_symnum; symnum++)
|
||
{
|
||
QUIT; /* Allow this to be interruptable */
|
||
fill_sym(dbg_file, abfd);
|
||
bufp = symbuf;
|
||
type = bufp->n_type;
|
||
|
||
os9k_process_one_symbol ((int)type, (int)bufp->n_desc,
|
||
(CORE_ADDR)bufp->n_value, bufp->n_strx, section_offsets, objfile);
|
||
|
||
/* We skip checking for a new .o or -l file; that should never
|
||
happen in this routine. */
|
||
#if 0
|
||
else if (type == N_TEXT)
|
||
{
|
||
/* I don't think this code will ever be executed, because
|
||
the GCC_COMPILED_FLAG_SYMBOL usually is right before
|
||
the N_SO symbol which starts this source file.
|
||
However, there is no reason not to accept
|
||
the GCC_COMPILED_FLAG_SYMBOL anywhere. */
|
||
|
||
if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL))
|
||
processing_gcc_compilation = 1;
|
||
else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL))
|
||
processing_gcc_compilation = 2;
|
||
|
||
if (AUTO_DEMANGLING)
|
||
{
|
||
set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
|
||
}
|
||
}
|
||
else if (type & N_EXT || type == (unsigned char)N_TEXT
|
||
|| type == (unsigned char)N_NBTEXT
|
||
) {
|
||
/* Global symbol: see if we came across a dbx defintion for
|
||
a corresponding symbol. If so, store the value. Remove
|
||
syms from the chain when their values are stored, but
|
||
search the whole chain, as there may be several syms from
|
||
different files with the same name. */
|
||
/* This is probably not true. Since the files will be read
|
||
in one at a time, each reference to a global symbol will
|
||
be satisfied in each file as it appears. So we skip this
|
||
section. */
|
||
;
|
||
}
|
||
#endif /* 0 */
|
||
}
|
||
|
||
current_objfile = NULL;
|
||
|
||
/* In a Solaris elf file, this variable, which comes from the
|
||
value of the N_SO symbol, will still be 0. Luckily, text_offset,
|
||
which comes from pst->textlow is correct. */
|
||
if (last_source_start_addr == 0)
|
||
last_source_start_addr = text_offset;
|
||
pst->symtab = end_symtab (text_offset + text_size, objfile, SECT_OFF_TEXT);
|
||
end_stabs ();
|
||
}
|
||
|
||
|
||
/* This handles a single symbol from the symbol-file, building symbols
|
||
into a GDB symtab. It takes these arguments and an implicit argument.
|
||
|
||
TYPE is the type field of the ".stab" symbol entry.
|
||
DESC is the desc field of the ".stab" entry.
|
||
VALU is the value field of the ".stab" entry.
|
||
NAME is the symbol name, in our address space.
|
||
SECTION_OFFSETS is a set of amounts by which the sections of this object
|
||
file were relocated when it was loaded into memory.
|
||
All symbols that refer
|
||
to memory locations need to be offset by these amounts.
|
||
OBJFILE is the object file from which we are reading symbols.
|
||
It is used in end_symtab. */
|
||
|
||
static void
|
||
os9k_process_one_symbol (type, desc, valu, name, section_offsets, objfile)
|
||
int type, desc;
|
||
CORE_ADDR valu;
|
||
char *name;
|
||
struct section_offsets *section_offsets;
|
||
struct objfile *objfile;
|
||
{
|
||
register struct context_stack *new;
|
||
/* The stab type used for the definition of the last function.
|
||
N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
|
||
static int function_stab_type = 0;
|
||
|
||
#if 0
|
||
/* Something is wrong if we see real data before
|
||
seeing a source file name. */
|
||
if (last_source_file == NULL && type != (unsigned char)N_SO)
|
||
{
|
||
/* Ignore any symbols which appear before an N_SO symbol. Currently
|
||
no one puts symbols there, but we should deal gracefully with the
|
||
case. A complain()t might be in order (if !IGNORE_SYMBOL (type)),
|
||
but this should not be an error (). */
|
||
return;
|
||
}
|
||
#endif /* 0 */
|
||
|
||
switch (type)
|
||
{
|
||
case N_SYM_LBRAC:
|
||
/* On most machines, the block addresses are relative to the
|
||
N_SO, the linker did not relocate them (sigh). */
|
||
valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
|
||
new = push_context (desc, valu);
|
||
break;
|
||
|
||
case N_SYM_RBRAC:
|
||
valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
|
||
new = pop_context();
|
||
|
||
#if !defined (OS9K_VARIABLES_INSIDE_BLOCK)
|
||
#define OS9K_VARIABLES_INSIDE_BLOCK(desc, gcc_p) 1
|
||
#endif
|
||
|
||
if (!OS9K_VARIABLES_INSIDE_BLOCK(desc, processing_gcc_compilation))
|
||
local_symbols = new->locals;
|
||
|
||
if (context_stack_depth > 1)
|
||
{
|
||
/* This is not the outermost LBRAC...RBRAC pair in the function,
|
||
its local symbols preceded it, and are the ones just recovered
|
||
from the context stack. Define the block for them (but don't
|
||
bother if the block contains no symbols. Should we complain
|
||
on blocks without symbols? I can't think of any useful purpose
|
||
for them). */
|
||
if (local_symbols != NULL)
|
||
{
|
||
/* Muzzle a compiler bug that makes end < start. (which
|
||
compilers? Is this ever harmful?). */
|
||
if (new->start_addr > valu)
|
||
{
|
||
complain (&lbrac_rbrac_complaint);
|
||
new->start_addr = valu;
|
||
}
|
||
/* Make a block for the local symbols within. */
|
||
finish_block (0, &local_symbols, new->old_blocks,
|
||
new->start_addr, valu, objfile);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (context_stack_depth == 0)
|
||
{
|
||
within_function = 0;
|
||
/* Make a block for the local symbols within. */
|
||
finish_block (new->name, &local_symbols, new->old_blocks,
|
||
new->start_addr, valu, objfile);
|
||
}
|
||
else
|
||
{
|
||
/* attach local_symbols to the end of new->locals */
|
||
if (!new->locals) new->locals = local_symbols;
|
||
else {
|
||
struct pending *p;
|
||
|
||
p = new->locals;
|
||
while (p->next) p = p->next;
|
||
p->next = local_symbols;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (OS9K_VARIABLES_INSIDE_BLOCK(desc, processing_gcc_compilation))
|
||
/* Now pop locals of block just finished. */
|
||
local_symbols = new->locals;
|
||
break;
|
||
|
||
|
||
case N_SYM_SLINE:
|
||
/* This type of "symbol" really just records
|
||
one line-number -- core-address correspondence.
|
||
Enter it in the line list for this symbol table. */
|
||
/* Relocate for dynamic loading and for ELF acc fn-relative syms. */
|
||
valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
|
||
/* FIXME: loses if sizeof (char *) > sizeof (int) */
|
||
record_line (current_subfile, (int)name, valu);
|
||
break;
|
||
|
||
/* The following symbol types need to have the appropriate offset added
|
||
to their value; then we process symbol definitions in the name. */
|
||
case N_SYM_SYM:
|
||
|
||
if (name)
|
||
{
|
||
char deftype;
|
||
char *dirn, *n;
|
||
char *p = strchr (name, ':');
|
||
if (p == NULL)
|
||
deftype = '\0';
|
||
else
|
||
deftype = p[1];
|
||
|
||
|
||
switch (deftype)
|
||
{
|
||
case 'S':
|
||
valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
|
||
n = strrchr(name, '/');
|
||
if (n != NULL) {
|
||
*n = '\0';
|
||
n++;
|
||
dirn = name;
|
||
} else {
|
||
n = name;
|
||
dirn = NULL;
|
||
}
|
||
*p = '\0';
|
||
if (symfile_depth++ == 0) {
|
||
if (last_source_file) {
|
||
end_symtab (valu, objfile, SECT_OFF_TEXT);
|
||
end_stabs ();
|
||
}
|
||
start_stabs ();
|
||
os9k_stabs = 1;
|
||
start_symtab (n, dirn, valu);
|
||
} else {
|
||
push_subfile();
|
||
start_subfile (n, dirn!=NULL ? dirn : current_subfile->dirname);
|
||
}
|
||
break;
|
||
|
||
case 'f':
|
||
case 'F':
|
||
valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
|
||
function_stab_type = type;
|
||
|
||
within_function = 1;
|
||
new = push_context (0, valu);
|
||
new->name = define_symbol (valu, name, desc, type, objfile);
|
||
break;
|
||
|
||
case 'V':
|
||
case 'v':
|
||
valu += ANOFFSET (section_offsets, SECT_OFF_DATA);
|
||
define_symbol (valu, name, desc, type, objfile);
|
||
break;
|
||
|
||
default:
|
||
define_symbol (valu, name, desc, type, objfile);
|
||
break;
|
||
}
|
||
}
|
||
break;
|
||
|
||
case N_SYM_SE:
|
||
if (--symfile_depth != 0)
|
||
start_subfile(pop_subfile(), current_subfile->dirname);
|
||
break;
|
||
|
||
default:
|
||
complain (&unknown_symtype_complaint,
|
||
local_hex_string((unsigned long) type));
|
||
/* FALLTHROUGH */
|
||
break;
|
||
|
||
case N_SYM_CMPLR:
|
||
break;
|
||
}
|
||
previous_stab_code = type;
|
||
}
|
||
|
||
/* Parse the user's idea of an offset for dynamic linking, into our idea
|
||
of how to represent it for fast symbol reading. */
|
||
|
||
static struct section_offsets *
|
||
os9k_symfile_offsets (objfile, addr)
|
||
struct objfile *objfile;
|
||
CORE_ADDR addr;
|
||
{
|
||
struct section_offsets *section_offsets;
|
||
int i;
|
||
|
||
objfile->num_sections = SECT_OFF_MAX;
|
||
section_offsets = (struct section_offsets *)
|
||
obstack_alloc (&objfile -> psymbol_obstack,
|
||
sizeof (struct section_offsets)
|
||
+ sizeof (section_offsets->offsets) * (SECT_OFF_MAX-1));
|
||
|
||
for (i = 0; i < SECT_OFF_MAX; i++)
|
||
ANOFFSET (section_offsets, i) = addr;
|
||
|
||
return section_offsets;
|
||
}
|
||
|
||
static struct sym_fns os9k_sym_fns =
|
||
{
|
||
bfd_target_os9k_flavour,
|
||
os9k_new_init, /* sym_new_init: init anything gbl to entire symtab */
|
||
os9k_symfile_init, /* sym_init: read initial info, setup for sym_read() */
|
||
os9k_symfile_read, /* sym_read: read a symbol file into symtab */
|
||
os9k_symfile_finish, /* sym_finish: finished with file, cleanup */
|
||
os9k_symfile_offsets, /* sym_offsets: parse user's offsets to internal form*/
|
||
NULL /* next: pointer to next struct sym_fns */
|
||
};
|
||
|
||
void
|
||
_initialize_os9kread ()
|
||
{
|
||
add_symtab_fns(&os9k_sym_fns);
|
||
}
|