/* Read ELF (Executable and Linking Format) object files for GDB.
- Copyright 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+
+ Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
+ 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
+
Written by Fred Fish at Cygnus Support.
-This file is part of GDB.
+ This file is part of GDB.
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#include "defs.h"
#include "bfd.h"
#include "gdb_string.h"
#include "elf-bfd.h"
+#include "elf/common.h"
+#include "elf/internal.h"
#include "elf/mips.h"
#include "symtab.h"
#include "symfile.h"
#include "complaints.h"
#include "demangle.h"
+extern void _initialize_elfread (void);
+
/* The struct elfinfo is available only during ELF symbol table and
- psymtab reading. It is destroyed at the complation of psymtab-reading.
+ psymtab reading. It is destroyed at the completion of psymtab-reading.
It's local to elf_symfile_read. */
-struct elfinfo {
- file_ptr dboffset; /* Offset to dwarf debug section */
- unsigned int dbsize; /* Size of dwarf debug section */
- file_ptr lnoffset; /* Offset to dwarf line number section */
- unsigned int lnsize; /* Size of dwarf line number section */
- asection *stabsect; /* Section pointer for .stab section */
- asection *stabindexsect; /* Section pointer for .stab.index section */
- asection *mdebugsect; /* Section pointer for .mdebug section */
-};
-
-/* Various things we might complain about... */
-
-struct complaint section_info_complaint =
- {"elf/stab section information %s without a preceding file symbol", 0, 0};
+struct elfinfo
+ {
+ asection *stabsect; /* Section pointer for .stab section */
+ asection *stabindexsect; /* Section pointer for .stab.index section */
+ asection *mdebugsect; /* Section pointer for .mdebug section */
+ };
-struct complaint section_info_dup_complaint =
- {"duplicated elf/stab section information for %s", 0, 0};
+static void free_elfinfo (void *);
-struct complaint stab_info_mismatch_complaint =
- {"elf/stab section information missing for %s", 0, 0};
+/* Locate the segments in ABFD. */
-struct complaint stab_info_questionable_complaint =
- {"elf/stab section information questionable for %s", 0, 0};
-
-static void
-elf_symfile_init PARAMS ((struct objfile *));
-
-static void
-elf_new_init PARAMS ((struct objfile *));
+static struct symfile_segment_data *
+elf_symfile_segments (bfd *abfd)
+{
+ Elf_Internal_Phdr *phdrs, **segments;
+ long phdrs_size;
+ int num_phdrs, num_segments, num_sections, i;
+ asection *sect;
+ struct symfile_segment_data *data;
+
+ phdrs_size = bfd_get_elf_phdr_upper_bound (abfd);
+ if (phdrs_size == -1)
+ return NULL;
+
+ phdrs = alloca (phdrs_size);
+ num_phdrs = bfd_get_elf_phdrs (abfd, phdrs);
+ if (num_phdrs == -1)
+ return NULL;
+
+ num_segments = 0;
+ segments = alloca (sizeof (Elf_Internal_Phdr *) * num_phdrs);
+ for (i = 0; i < num_phdrs; i++)
+ if (phdrs[i].p_type == PT_LOAD)
+ segments[num_segments++] = &phdrs[i];
+
+ if (num_segments == 0)
+ return NULL;
+
+ data = XZALLOC (struct symfile_segment_data);
+ data->num_segments = num_segments;
+ data->segment_bases = XCALLOC (num_segments, CORE_ADDR);
+ data->segment_sizes = XCALLOC (num_segments, CORE_ADDR);
+
+ for (i = 0; i < num_segments; i++)
+ {
+ data->segment_bases[i] = segments[i]->p_vaddr;
+ data->segment_sizes[i] = segments[i]->p_memsz;
+ }
-static void
-elf_symfile_read PARAMS ((struct objfile *, struct section_offsets *, int));
+ num_sections = bfd_count_sections (abfd);
+ data->segment_info = XCALLOC (num_sections, int);
-static void
-elf_symfile_finish PARAMS ((struct objfile *));
+ for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
+ {
+ int j;
+ CORE_ADDR vma;
-static void
-elf_symtab_read PARAMS ((bfd *, CORE_ADDR, struct objfile *, int));
+ if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0)
+ continue;
-static void
-free_elfinfo PARAMS ((void *));
+ vma = bfd_get_section_vma (abfd, sect);
-static struct section_offsets *
-elf_symfile_offsets PARAMS ((struct objfile *, CORE_ADDR));
+ for (j = 0; j < num_segments; j++)
+ if (segments[j]->p_memsz > 0
+ && vma >= segments[j]->p_vaddr
+ && vma < segments[j]->p_vaddr + segments[j]->p_memsz)
+ {
+ data->segment_info[i] = j + 1;
+ break;
+ }
-static struct minimal_symbol *
-record_minimal_symbol_and_info PARAMS ((char *, CORE_ADDR,
- enum minimal_symbol_type, char *,
- struct objfile *));
+ if (bfd_get_section_size (sect) > 0 && j == num_segments)
+ warning (_("Loadable segment \"%s\" outside of ELF segments"),
+ bfd_section_name (abfd, sect));
+ }
-static void
-elf_locate_sections PARAMS ((bfd *, asection *, void *));
+ return data;
+}
/* We are called once per section from elf_symfile_read. We
need to examine each section we are passed, check to see
-kingdon). */
static void
-elf_locate_sections (ignore_abfd, sectp, eip)
- bfd *ignore_abfd;
- asection *sectp;
- PTR eip;
+elf_locate_sections (bfd *ignore_abfd, asection *sectp, void *eip)
{
- register struct elfinfo *ei;
+ struct elfinfo *ei;
ei = (struct elfinfo *) eip;
- if (STREQ (sectp -> name, ".debug"))
- {
- ei -> dboffset = sectp -> filepos;
- ei -> dbsize = bfd_get_section_size_before_reloc (sectp);
- }
- else if (STREQ (sectp -> name, ".line"))
+ if (strcmp (sectp->name, ".stab") == 0)
{
- ei -> lnoffset = sectp -> filepos;
- ei -> lnsize = bfd_get_section_size_before_reloc (sectp);
+ ei->stabsect = sectp;
}
- else if (STREQ (sectp -> name, ".stab"))
+ else if (strcmp (sectp->name, ".stab.index") == 0)
{
- ei -> stabsect = sectp;
+ ei->stabindexsect = sectp;
}
- else if (STREQ (sectp -> name, ".stab.index"))
- {
- ei -> stabindexsect = sectp;
- }
- else if (STREQ (sectp -> name, ".mdebug"))
- {
- ei -> mdebugsect = sectp;
- }
-}
-
-#if 0 /* Currently unused */
-
-char *
-elf_interpreter (abfd)
- bfd *abfd;
-{
- sec_ptr interp_sec;
- unsigned size;
- char *interp = NULL;
-
- interp_sec = bfd_get_section_by_name (abfd, ".interp");
- if (interp_sec)
+ else if (strcmp (sectp->name, ".mdebug") == 0)
{
- size = bfd_section_size (abfd, interp_sec);
- interp = alloca (size);
- if (bfd_get_section_contents (abfd, interp_sec, interp, (file_ptr)0,
- size))
- {
- interp = savestring (interp, size - 1);
- }
- else
- {
- interp = NULL;
- }
+ ei->mdebugsect = sectp;
}
- return (interp);
}
-#endif
-
static struct minimal_symbol *
-record_minimal_symbol_and_info (name, address, ms_type, info, objfile)
- char *name;
- CORE_ADDR address;
- enum minimal_symbol_type ms_type;
- char *info; /* FIXME, is this really char *? */
- struct objfile *objfile;
+record_minimal_symbol (char *name, CORE_ADDR address,
+ enum minimal_symbol_type ms_type,
+ asection *bfd_section, struct objfile *objfile)
{
- int section;
-
- /* Guess the section from the type. This is likely to be wrong in
- some cases. */
- switch (ms_type)
- {
- case mst_text:
- case mst_file_text:
- section = SECT_OFF_TEXT;
-#ifdef SMASH_TEXT_ADDRESS
- SMASH_TEXT_ADDRESS (address);
-#endif
- break;
- case mst_data:
- case mst_file_data:
- section = SECT_OFF_DATA;
- break;
- case mst_bss:
- case mst_file_bss:
- section = SECT_OFF_BSS;
- break;
- default:
- section = -1;
- break;
- }
+ if (ms_type == mst_text || ms_type == mst_file_text)
+ address = gdbarch_smash_text_address (current_gdbarch, address);
- name = obsavestring (name, strlen (name), &objfile -> symbol_obstack);
return prim_record_minimal_symbol_and_info
- (name, address, ms_type, info, section, objfile);
+ (name, address, ms_type, NULL, bfd_section->index, bfd_section, objfile);
}
/*
-LOCAL FUNCTION
+ LOCAL FUNCTION
- elf_symtab_read -- read the symbol table of an ELF file
+ elf_symtab_read -- read the symbol table of an ELF file
-SYNOPSIS
+ SYNOPSIS
- void elf_symtab_read (bfd *abfd, CORE_ADDR addr,
- struct objfile *objfile, int dynamic)
+ void elf_symtab_read (struct objfile *objfile, int dynamic,
+ long number_of_symbols, asymbol **symbol_table)
-DESCRIPTION
+ DESCRIPTION
- Given an open bfd, a base address to relocate symbols to, and a
- flag that specifies whether or not this bfd is for an executable
- or not (may be shared library for example), add all the global
- function and data symbols to the minimal symbol table.
+ Given an objfile, a symbol table, and a flag indicating whether the
+ symbol table contains dynamic symbols, add all the global function
+ and data symbols to the minimal symbol table.
- In stabs-in-ELF, as implemented by Sun, there are some local symbols
- defined in the ELF symbol table, which can be used to locate
- the beginnings of sections from each ".o" file that was linked to
- form the executable objfile. We gather any such info and record it
- in data structures hung off the objfile's private data.
+ In stabs-in-ELF, as implemented by Sun, there are some local symbols
+ defined in the ELF symbol table, which can be used to locate
+ the beginnings of sections from each ".o" file that was linked to
+ form the executable objfile. We gather any such info and record it
+ in data structures hung off the objfile's private data.
-*/
+ */
static void
-elf_symtab_read (abfd, addr, objfile, dynamic)
- bfd *abfd;
- CORE_ADDR addr;
- struct objfile *objfile;
- int dynamic;
+elf_symtab_read (struct objfile *objfile, int dynamic,
+ long number_of_symbols, asymbol **symbol_table)
{
long storage_needed;
asymbol *sym;
- asymbol **symbol_table;
- long number_of_symbols;
long i;
- int index;
- struct cleanup *back_to;
CORE_ADDR symaddr;
+ CORE_ADDR offset;
enum minimal_symbol_type ms_type;
/* If sectinfo is nonNULL, it contains section info that should end up
filed in the objfile. */
seen any section info for it yet. */
asymbol *filesym = 0;
#ifdef SOFUN_ADDRESS_MAYBE_MISSING
- /* Name of filesym, as saved on the symbol_obstack. */
- char *filesymname = obsavestring ("", 0, &objfile->symbol_obstack);
+ /* Name of filesym, as saved on the objfile_obstack. */
+ char *filesymname = obsavestring ("", 0, &objfile->objfile_obstack);
#endif
- struct dbx_symfile_info *dbx = (struct dbx_symfile_info *)
- objfile->sym_stab_info;
- unsigned long size;
- int stripped = (bfd_get_symcount (abfd) == 0);
-
- if (dynamic)
- {
- storage_needed = bfd_get_dynamic_symtab_upper_bound (abfd);
+ struct dbx_symfile_info *dbx = objfile->deprecated_sym_stab_info;
+ int stripped = (bfd_get_symcount (objfile->obfd) == 0);
- /* Nothing to be done if there is no dynamic symtab. */
- if (storage_needed < 0)
- return;
- }
- else
+ for (i = 0; i < number_of_symbols; i++)
{
- storage_needed = bfd_get_symtab_upper_bound (abfd);
- if (storage_needed < 0)
- error ("Can't read symbols from %s: %s", bfd_get_filename (abfd),
- bfd_errmsg (bfd_get_error ()));
- }
- if (storage_needed > 0)
- {
- symbol_table = (asymbol **) xmalloc (storage_needed);
- back_to = make_cleanup (free, symbol_table);
- if (dynamic)
- number_of_symbols = bfd_canonicalize_dynamic_symtab (abfd,
- symbol_table);
- else
- number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table);
- if (number_of_symbols < 0)
- error ("Can't read symbols from %s: %s", bfd_get_filename (abfd),
- bfd_errmsg (bfd_get_error ()));
- for (i = 0; i < number_of_symbols; i++)
+ sym = symbol_table[i];
+ if (sym->name == NULL || *sym->name == '\0')
{
- sym = symbol_table[i];
- if (sym -> name == NULL || *sym -> name == '\0')
- {
- /* Skip names that don't exist (shouldn't happen), or names
- that are null strings (may happen). */
- continue;
- }
+ /* Skip names that don't exist (shouldn't happen), or names
+ that are null strings (may happen). */
+ continue;
+ }
+
+ /* Skip "special" symbols, e.g. ARM mapping symbols. These are
+ symbols which do not correspond to objects in the symbol table,
+ but have some other target-specific meaning. */
+ if (bfd_is_target_special_symbol (objfile->obfd, sym))
+ continue;
- if (dynamic
- && sym -> section == &bfd_und_section
- && (sym -> flags & BSF_FUNCTION))
+ offset = ANOFFSET (objfile->section_offsets, sym->section->index);
+ if (dynamic
+ && sym->section == &bfd_und_section
+ && (sym->flags & BSF_FUNCTION))
+ {
+ struct minimal_symbol *msym;
+
+ /* Symbol is a reference to a function defined in
+ a shared library.
+ If its value is non zero then it is usually the address
+ of the corresponding entry in the procedure linkage table,
+ plus the desired section offset.
+ If its value is zero then the dynamic linker has to resolve
+ the symbol. We are unable to find any meaningful address
+ for this symbol in the executable file, so we skip it. */
+ symaddr = sym->value;
+ if (symaddr == 0)
+ continue;
+ symaddr += offset;
+ msym = record_minimal_symbol
+ ((char *) sym->name, symaddr,
+ mst_solib_trampoline, sym->section, objfile);
+#ifdef SOFUN_ADDRESS_MAYBE_MISSING
+ if (msym != NULL)
+ msym->filename = filesymname;
+#endif
+ continue;
+ }
+
+ /* If it is a nonstripped executable, do not enter dynamic
+ symbols, as the dynamic symbol table is usually a subset
+ of the main symbol table. */
+ if (dynamic && !stripped)
+ continue;
+ if (sym->flags & BSF_FILE)
+ {
+ /* STT_FILE debugging symbol that helps stabs-in-elf debugging.
+ Chain any old one onto the objfile; remember new sym. */
+ if (sectinfo != NULL)
{
- struct minimal_symbol *msym;
-
- /* Symbol is a reference to a function defined in
- a shared library.
- If its value is non zero then it is usually the address
- of the corresponding entry in the procedure linkage table,
- relative to the base address.
- If its value is zero then the dynamic linker has to resolve
- the symbol. We are unable to find any meaningful address
- for this symbol in the executable file, so we skip it. */
- symaddr = sym -> value;
- if (symaddr == 0)
- continue;
- symaddr += addr;
- msym = record_minimal_symbol_and_info
- ((char *) sym -> name, symaddr,
- mst_solib_trampoline, NULL, objfile);
+ sectinfo->next = dbx->stab_section_info;
+ dbx->stab_section_info = sectinfo;
+ sectinfo = NULL;
+ }
+ filesym = sym;
#ifdef SOFUN_ADDRESS_MAYBE_MISSING
- if (msym != NULL)
- msym->filename = filesymname;
+ filesymname =
+ obsavestring ((char *) filesym->name, strlen (filesym->name),
+ &objfile->objfile_obstack);
#endif
- continue;
+ }
+ else if (sym->flags & BSF_SECTION_SYM)
+ continue;
+ else if (sym->flags & (BSF_GLOBAL | BSF_LOCAL | BSF_WEAK))
+ {
+ struct minimal_symbol *msym;
+
+ /* Select global/local/weak symbols. Note that bfd puts abs
+ symbols in their own section, so all symbols we are
+ interested in will have a section. */
+ /* Bfd symbols are section relative. */
+ symaddr = sym->value + sym->section->vma;
+ /* Relocate all non-absolute symbols by the section offset. */
+ if (sym->section != &bfd_abs_section)
+ {
+ symaddr += offset;
}
-
- /* If it is a nonstripped executable, do not enter dynamic
- symbols, as the dynamic symbol table is usually a subset
- of the main symbol table. */
- if (dynamic && !stripped)
- continue;
- if (sym -> flags & BSF_FILE)
+ /* For non-absolute symbols, use the type of the section
+ they are relative to, to intuit text/data. Bfd provides
+ no way of figuring this out for absolute symbols. */
+ if (sym->section == &bfd_abs_section)
{
- /* STT_FILE debugging symbol that helps stabs-in-elf debugging.
- Chain any old one onto the objfile; remember new sym. */
- if (sectinfo != NULL)
+ /* This is a hack to get the minimal symbol type
+ right for Irix 5, which has absolute addresses
+ with special section indices for dynamic symbols. */
+ unsigned short shndx =
+ ((elf_symbol_type *) sym)->internal_elf_sym.st_shndx;
+
+ switch (shndx)
{
- sectinfo -> next = dbx -> stab_section_info;
- dbx -> stab_section_info = sectinfo;
- sectinfo = NULL;
+ case SHN_MIPS_TEXT:
+ ms_type = mst_text;
+ break;
+ case SHN_MIPS_DATA:
+ ms_type = mst_data;
+ break;
+ case SHN_MIPS_ACOMMON:
+ ms_type = mst_bss;
+ break;
+ default:
+ ms_type = mst_abs;
+ }
+
+ /* If it is an Irix dynamic symbol, skip section name
+ symbols, relocate all others by section offset. */
+ if (ms_type != mst_abs)
+ {
+ if (sym->name[0] == '.')
+ continue;
+ symaddr += offset;
}
- filesym = sym;
-#ifdef SOFUN_ADDRESS_MAYBE_MISSING
- filesymname =
- obsavestring ((char *)filesym->name, strlen (filesym->name),
- &objfile->symbol_obstack);
-#endif
}
- else if (sym -> flags & (BSF_GLOBAL | BSF_LOCAL | BSF_WEAK))
+ else if (sym->section->flags & SEC_CODE)
{
- struct minimal_symbol *msym;
-
- /* Select global/local/weak symbols. Note that bfd puts abs
- symbols in their own section, so all symbols we are
- interested in will have a section. */
- /* Bfd symbols are section relative. */
- symaddr = sym -> value + sym -> section -> vma;
- /* Relocate all non-absolute symbols by base address. */
- if (sym -> section != &bfd_abs_section)
+ if (sym->flags & (BSF_GLOBAL | BSF_WEAK))
{
- symaddr += addr;
+ ms_type = mst_text;
}
- /* For non-absolute symbols, use the type of the section
- they are relative to, to intuit text/data. Bfd provides
- no way of figuring this out for absolute symbols. */
- if (sym -> section == &bfd_abs_section)
+ else if ((sym->name[0] == '.' && sym->name[1] == 'L')
+ || ((sym->flags & BSF_LOCAL)
+ && sym->name[0] == '$'
+ && sym->name[1] == 'L'))
+ /* Looks like a compiler-generated label. Skip
+ it. The assembler should be skipping these (to
+ keep executables small), but apparently with
+ gcc on the (deleted) delta m88k SVR4, it loses.
+ So to have us check too should be harmless (but
+ I encourage people to fix this in the assembler
+ instead of adding checks here). */
+ continue;
+ else
{
- /* This is a hack to get the minimal symbol type
- right for Irix 5, which has absolute adresses
- with special section indices for dynamic symbols. */
- unsigned short shndx =
- ((elf_symbol_type *) sym)->internal_elf_sym.st_shndx;
-
- switch (shndx)
- {
- case SHN_MIPS_TEXT:
- ms_type = mst_text;
- break;
- case SHN_MIPS_DATA:
- ms_type = mst_data;
- break;
- case SHN_MIPS_ACOMMON:
- ms_type = mst_bss;
- break;
- default:
- ms_type = mst_abs;
- }
+ ms_type = mst_file_text;
}
- else if (sym -> section -> flags & SEC_CODE)
+ }
+ else if (sym->section->flags & SEC_ALLOC)
+ {
+ if (sym->flags & (BSF_GLOBAL | BSF_WEAK))
{
- if (sym -> flags & BSF_GLOBAL)
+ if (sym->section->flags & SEC_LOAD)
{
- ms_type = mst_text;
+ ms_type = mst_data;
}
- else if ((sym->name[0] == '.' && sym->name[1] == 'L')
- || ((sym -> flags & BSF_LOCAL)
- && sym->name[0] == '$'
- && sym->name[1] == 'L'))
- /* Looks like a compiler-generated label. Skip it.
- The assembler should be skipping these (to keep
- executables small), but apparently with gcc on the
- delta m88k SVR4, it loses. So to have us check too
- should be harmless (but I encourage people to fix this
- in the assembler instead of adding checks here). */
- continue;
else
{
- ms_type = mst_file_text;
+ ms_type = mst_bss;
}
}
- else if (sym -> section -> flags & SEC_ALLOC)
+ else if (sym->flags & BSF_LOCAL)
{
- if (sym -> flags & BSF_GLOBAL)
- {
- if (sym -> section -> flags & SEC_LOAD)
- {
- ms_type = mst_data;
- }
- else
- {
- ms_type = mst_bss;
- }
- }
- else if (sym -> flags & BSF_LOCAL)
+ /* Named Local variable in a Data section.
+ Check its name for stabs-in-elf. */
+ int special_local_sect;
+ if (strcmp ("Bbss.bss", sym->name) == 0)
+ special_local_sect = SECT_OFF_BSS (objfile);
+ else if (strcmp ("Ddata.data", sym->name) == 0)
+ special_local_sect = SECT_OFF_DATA (objfile);
+ else if (strcmp ("Drodata.rodata", sym->name) == 0)
+ special_local_sect = SECT_OFF_RODATA (objfile);
+ else
+ special_local_sect = -1;
+ if (special_local_sect >= 0)
{
- /* Named Local variable in a Data section. Check its
- name for stabs-in-elf. The STREQ macro checks the
- first character inline, so we only actually do a
- strcmp function call on names that start with 'B'
- or 'D' */
- index = SECT_OFF_MAX;
- if (STREQ ("Bbss.bss", sym -> name))
- {
- index = SECT_OFF_BSS;
- }
- else if (STREQ ("Ddata.data", sym -> name))
- {
- index = SECT_OFF_DATA;
- }
- else if (STREQ ("Drodata.rodata", sym -> name))
+ /* Found a special local symbol. Allocate a
+ sectinfo, if needed, and fill it in. */
+ if (sectinfo == NULL)
{
- index = SECT_OFF_RODATA;
- }
- if (index != SECT_OFF_MAX)
- {
- /* Found a special local symbol. Allocate a
- sectinfo, if needed, and fill it in. */
- if (sectinfo == NULL)
+ int max_index;
+ size_t size;
+
+ max_index
+ = max (SECT_OFF_BSS (objfile),
+ max (SECT_OFF_DATA (objfile),
+ SECT_OFF_RODATA (objfile)));
+
+ /* max_index is the largest index we'll
+ use into this array, so we must
+ allocate max_index+1 elements for it.
+ However, 'struct stab_section_info'
+ already includes one element, so we
+ need to allocate max_index aadditional
+ elements. */
+ size = (sizeof (struct stab_section_info)
+ + (sizeof (CORE_ADDR)
+ * max_index));
+ sectinfo = (struct stab_section_info *)
+ xmalloc (size);
+ memset (sectinfo, 0, size);
+ sectinfo->num_sections = max_index;
+ if (filesym == NULL)
{
- sectinfo = (struct stab_section_info *)
- xmmalloc (objfile -> md, sizeof (*sectinfo));
- memset ((PTR) sectinfo, 0, sizeof (*sectinfo));
- if (filesym == NULL)
- {
- complain (§ion_info_complaint,
- sym -> name);
- }
- else
- {
- sectinfo -> filename =
- (char *) filesym -> name;
- }
+ complaint (&symfile_complaints,
+ _("elf/stab section information %s without a preceding file symbol"),
+ sym->name);
}
- if (sectinfo -> sections[index] != 0)
+ else
{
- complain (§ion_info_dup_complaint,
- sectinfo -> filename);
+ sectinfo->filename =
+ (char *) filesym->name;
}
- /* Bfd symbols are section relative. */
- symaddr = sym -> value + sym -> section -> vma;
- /* Relocate non-absolute symbols by base address. */
- if (sym -> section != &bfd_abs_section)
- {
- symaddr += addr;
- }
- sectinfo -> sections[index] = symaddr;
- /* The special local symbols don't go in the
- minimal symbol table, so ignore this one. */
- continue;
- }
- /* Not a special stabs-in-elf symbol, do regular
- symbol processing. */
- if (sym -> section -> flags & SEC_LOAD)
- {
- ms_type = mst_file_data;
- }
- else
- {
- ms_type = mst_file_bss;
}
+ if (sectinfo->sections[special_local_sect] != 0)
+ complaint (&symfile_complaints,
+ _("duplicated elf/stab section information for %s"),
+ sectinfo->filename);
+ /* BFD symbols are section relative. */
+ symaddr = sym->value + sym->section->vma;
+ /* Relocate non-absolute symbols by the
+ section offset. */
+ if (sym->section != &bfd_abs_section)
+ symaddr += offset;
+ sectinfo->sections[special_local_sect] = symaddr;
+ /* The special local symbols don't go in the
+ minimal symbol table, so ignore this one. */
+ continue;
+ }
+ /* Not a special stabs-in-elf symbol, do regular
+ symbol processing. */
+ if (sym->section->flags & SEC_LOAD)
+ {
+ ms_type = mst_file_data;
}
else
{
- ms_type = mst_unknown;
+ ms_type = mst_file_bss;
}
}
else
{
- /* FIXME: Solaris2 shared libraries include lots of
- odd "absolute" and "undefined" symbols, that play
- hob with actions like finding what function the PC
- is in. Ignore them if they aren't text, data, or bss. */
- /* ms_type = mst_unknown; */
- continue; /* Skip this symbol. */
+ ms_type = mst_unknown;
}
+ }
+ else
+ {
+ /* FIXME: Solaris2 shared libraries include lots of
+ odd "absolute" and "undefined" symbols, that play
+ hob with actions like finding what function the PC
+ is in. Ignore them if they aren't text, data, or bss. */
+ /* ms_type = mst_unknown; */
+ continue; /* Skip this symbol. */
+ }
+ msym = record_minimal_symbol
+ ((char *) sym->name, symaddr,
+ ms_type, sym->section, objfile);
+ if (msym)
+ {
/* Pass symbol size field in via BFD. FIXME!!! */
- size = ((elf_symbol_type *) sym) -> internal_elf_sym.st_size;
- msym = record_minimal_symbol_and_info
- ((char *) sym -> name, symaddr,
- ms_type, (PTR) size, objfile);
+ unsigned long size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
+ MSYMBOL_SIZE(msym) = size;
+ }
#ifdef SOFUN_ADDRESS_MAYBE_MISSING
- if (msym != NULL)
- msym->filename = filesymname;
+ if (msym != NULL)
+ msym->filename = filesymname;
#endif
- }
+ gdbarch_elf_make_msymbol_special (current_gdbarch, sym, msym);
}
- do_cleanups (back_to);
}
}
We look for sections with specific names, to tell us what debug
format to look for: FIXME!!!
- dwarf_build_psymtabs() builds psymtabs for DWARF symbols;
elfstab_build_psymtabs() handles STABS symbols;
mdebug_build_psymtabs() handles ECOFF debugging information.
capability even for files compiled without -g. */
static void
-elf_symfile_read (objfile, section_offsets, mainline)
- struct objfile *objfile;
- struct section_offsets *section_offsets;
- int mainline;
+elf_symfile_read (struct objfile *objfile, int mainline)
{
bfd *abfd = objfile->obfd;
struct elfinfo ei;
struct cleanup *back_to;
CORE_ADDR offset;
+ long symcount = 0, dynsymcount = 0, synthcount, storage_needed;
+ asymbol **symbol_table = NULL, **dyn_symbol_table = NULL;
+ asymbol *synthsyms;
init_minimal_symbol_collection ();
- back_to = make_cleanup (discard_minimal_symbols, 0);
+ back_to = make_cleanup_discard_minimal_symbols ();
memset ((char *) &ei, 0, sizeof (ei));
/* Allocate struct to keep track of the symfile */
- objfile->sym_stab_info = (PTR)
- xmmalloc (objfile -> md, sizeof (struct dbx_symfile_info));
- memset ((char *) objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info));
- make_cleanup (free_elfinfo, (PTR) objfile);
+ objfile->deprecated_sym_stab_info = (struct dbx_symfile_info *)
+ xmalloc (sizeof (struct dbx_symfile_info));
+ memset ((char *) objfile->deprecated_sym_stab_info, 0, sizeof (struct dbx_symfile_info));
+ make_cleanup (free_elfinfo, (void *) objfile);
/* Process the normal ELF symbol table first. This may write some
- chain of info into the dbx_symfile_info in objfile->sym_stab_info,
+ chain of info into the dbx_symfile_info in objfile->deprecated_sym_stab_info,
which can later be used by elfstab_offset_sections. */
- /* FIXME, should take a section_offsets param, not just an offset. */
- offset = ANOFFSET (section_offsets, 0);
- elf_symtab_read (abfd, offset, objfile, 0);
+ storage_needed = bfd_get_symtab_upper_bound (objfile->obfd);
+ if (storage_needed < 0)
+ error (_("Can't read symbols from %s: %s"), bfd_get_filename (objfile->obfd),
+ bfd_errmsg (bfd_get_error ()));
+
+ if (storage_needed > 0)
+ {
+ symbol_table = (asymbol **) xmalloc (storage_needed);
+ make_cleanup (xfree, symbol_table);
+ symcount = bfd_canonicalize_symtab (objfile->obfd, symbol_table);
+
+ if (symcount < 0)
+ error (_("Can't read symbols from %s: %s"), bfd_get_filename (objfile->obfd),
+ bfd_errmsg (bfd_get_error ()));
+
+ elf_symtab_read (objfile, 0, symcount, symbol_table);
+ }
/* Add the dynamic symbols. */
- elf_symtab_read (abfd, offset, objfile, 1);
+ storage_needed = bfd_get_dynamic_symtab_upper_bound (objfile->obfd);
+
+ if (storage_needed > 0)
+ {
+ dyn_symbol_table = (asymbol **) xmalloc (storage_needed);
+ make_cleanup (xfree, dyn_symbol_table);
+ dynsymcount = bfd_canonicalize_dynamic_symtab (objfile->obfd,
+ dyn_symbol_table);
+
+ if (dynsymcount < 0)
+ error (_("Can't read symbols from %s: %s"), bfd_get_filename (objfile->obfd),
+ bfd_errmsg (bfd_get_error ()));
+
+ elf_symtab_read (objfile, 1, dynsymcount, dyn_symbol_table);
+ }
+
+ /* Add synthetic symbols - for instance, names for any PLT entries. */
+
+ synthcount = bfd_get_synthetic_symtab (abfd, symcount, symbol_table,
+ dynsymcount, dyn_symbol_table,
+ &synthsyms);
+ if (synthcount > 0)
+ {
+ asymbol **synth_symbol_table;
+ long i;
+
+ make_cleanup (xfree, synthsyms);
+ synth_symbol_table = xmalloc (sizeof (asymbol *) * synthcount);
+ for (i = 0; i < synthcount; i++)
+ synth_symbol_table[i] = synthsyms + i;
+ make_cleanup (xfree, synth_symbol_table);
+ elf_symtab_read (objfile, 0, synthcount, synth_symbol_table);
+ }
+
+ /* Install any minimal symbols that have been collected as the current
+ minimal symbols for this objfile. The debug readers below this point
+ should not generate new minimal symbols; if they do it's their
+ responsibility to install them. "mdebug" appears to be the only one
+ which will do this. */
+
+ install_minimal_symbols (objfile);
+ do_cleanups (back_to);
/* Now process debugging information, which is contained in
- special ELF sections. We first have to find them... */
+ special ELF sections. */
+
+ /* If we are reinitializing, or if we have never loaded syms yet,
+ set table to empty. MAINLINE is cleared so that *_read_psymtab
+ functions do not all also re-initialize the psymbol table. */
+ if (mainline)
+ {
+ init_psymbol_list (objfile, 0);
+ mainline = 0;
+ }
+
+ /* We first have to find them... */
+ bfd_map_over_sections (abfd, elf_locate_sections, (void *) & ei);
- bfd_map_over_sections (abfd, elf_locate_sections, (PTR) &ei);
- if (ei.dboffset && ei.lnoffset)
+ /* ELF debugging information is inserted into the psymtab in the
+ order of least informative first - most informative last. Since
+ the psymtab table is searched `most recent insertion first' this
+ increases the probability that more detailed debug information
+ for a section is found.
+
+ For instance, an object file might contain both .mdebug (XCOFF)
+ and .debug_info (DWARF2) sections then .mdebug is inserted first
+ (searched last) and DWARF2 is inserted last (searched first). If
+ we don't do this then the XCOFF info is found first - for code in
+ an included file XCOFF info is useless. */
+
+ if (ei.mdebugsect)
{
- /* DWARF sections */
- dwarf_build_psymtabs (objfile,
- section_offsets, mainline,
- ei.dboffset, ei.dbsize,
- ei.lnoffset, ei.lnsize);
+ const struct ecoff_debug_swap *swap;
+
+ /* .mdebug section, presumably holding ECOFF debugging
+ information. */
+ swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
+ if (swap)
+ elfmdebug_build_psymtabs (objfile, swap, ei.mdebugsect);
}
if (ei.stabsect)
{
asection *str_sect;
/* Stab sections have an associated string table that looks like
- a separate section. */
+ a separate section. */
str_sect = bfd_get_section_by_name (abfd, ".stabstr");
/* FIXME should probably warn about a stab section without a stabstr. */
if (str_sect)
elfstab_build_psymtabs (objfile,
- section_offsets,
mainline,
- ei.stabsect->filepos,
- bfd_section_size (abfd, ei.stabsect),
+ ei.stabsect,
str_sect->filepos,
bfd_section_size (abfd, str_sect));
}
- if (ei.mdebugsect)
+ if (dwarf2_has_info (objfile))
{
- const struct ecoff_debug_swap *swap;
-
- /* .mdebug section, presumably holding ECOFF debugging
- information. */
- swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
- if (swap)
- elfmdebug_build_psymtabs (objfile, swap, ei.mdebugsect,
- section_offsets);
+ /* DWARF 2 sections */
+ dwarf2_build_psymtabs (objfile, mainline);
}
- /* Install any minimal symbols that have been collected as the current
- minimal symbols for this objfile. */
-
- install_minimal_symbols (objfile);
-
- do_cleanups (back_to);
+ /* FIXME: kettenis/20030504: This still needs to be integrated with
+ dwarf2read.c in a better way. */
+ dwarf2_build_frame_info (objfile);
}
-/* This cleans up the objfile's sym_stab_info pointer, and the chain of
- stab_section_info's, that might be dangling from it. */
+/* This cleans up the objfile's deprecated_sym_stab_info pointer, and
+ the chain of stab_section_info's, that might be dangling from
+ it. */
static void
-free_elfinfo (objp)
- PTR objp;
+free_elfinfo (void *objp)
{
- struct objfile *objfile = (struct objfile *)objp;
- struct dbx_symfile_info *dbxinfo = (struct dbx_symfile_info *)
- objfile->sym_stab_info;
+ struct objfile *objfile = (struct objfile *) objp;
+ struct dbx_symfile_info *dbxinfo = objfile->deprecated_sym_stab_info;
struct stab_section_info *ssi, *nssi;
ssi = dbxinfo->stab_section_info;
while (ssi)
{
nssi = ssi->next;
- mfree (objfile->md, ssi);
+ xfree (ssi);
ssi = nssi;
}
We reinitialize buildsym, since we may be reading stabs from an ELF file. */
static void
-elf_new_init (ignore)
- struct objfile *ignore;
+elf_new_init (struct objfile *ignore)
{
stabsread_new_init ();
buildsym_new_init ();
objfile struct from the global list of known objfiles. */
static void
-elf_symfile_finish (objfile)
- struct objfile *objfile;
+elf_symfile_finish (struct objfile *objfile)
{
- if (objfile -> sym_stab_info != NULL)
+ if (objfile->deprecated_sym_stab_info != NULL)
{
- mfree (objfile -> md, objfile -> sym_stab_info);
+ xfree (objfile->deprecated_sym_stab_info);
}
}
just a stub. */
static void
-elf_symfile_init (ignore)
- struct objfile *ignore;
+elf_symfile_init (struct objfile *objfile)
{
+ /* ELF objects may be reordered, so set OBJF_REORDERED. If we
+ find this causes a significant slowdown in gdb then we could
+ set it in the debug symbol readers only when necessary. */
+ objfile->flags |= OBJF_REORDERED;
}
-/* ELF specific parsing routine for section offsets.
-
- Plain and simple for now. */
-
-static
-struct section_offsets *
-elf_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;
-}
-\f
/* When handling an ELF file that contains Sun STABS debug info,
some of the debug info is relative to the particular chunk of the
section that was generated in its individual .o file. E.g.
with wierd names. Go get 'em when needed. */
void
-elfstab_offset_sections (objfile, pst)
- struct objfile *objfile;
- struct partial_symtab *pst;
+elfstab_offset_sections (struct objfile *objfile, struct partial_symtab *pst)
{
char *filename = pst->filename;
- struct dbx_symfile_info *dbx = (struct dbx_symfile_info *)
- objfile->sym_stab_info;
+ struct dbx_symfile_info *dbx = objfile->deprecated_sym_stab_info;
struct stab_section_info *maybe = dbx->stab_section_info;
struct stab_section_info *questionable = 0;
int i;
/* The ELF symbol info doesn't include path names, so strip the path
(if any) from the psymtab filename. */
while (0 != (p = strchr (filename, '/')))
- filename = p+1;
+ filename = p + 1;
/* FIXME: This linear search could speed up significantly
if it was chained in the right order to match how we search it,
for (; maybe; maybe = maybe->next)
{
if (filename[0] == maybe->filename[0]
- && STREQ (filename, maybe->filename))
+ && strcmp (filename, maybe->filename) == 0)
{
/* We found a match. But there might be several source files
(from different directories) with the same name. */
if (0 == maybe->found)
break;
- questionable = maybe; /* Might use it later. */
+ questionable = maybe; /* Might use it later. */
}
}
if (maybe == 0 && questionable != 0)
{
- complain (&stab_info_questionable_complaint, filename);
+ complaint (&symfile_complaints,
+ _("elf/stab section information questionable for %s"), filename);
maybe = questionable;
}
/* Found it! Allocate a new psymtab struct, and fill it in. */
maybe->found++;
pst->section_offsets = (struct section_offsets *)
- obstack_alloc (&objfile -> psymbol_obstack,
- sizeof (struct section_offsets) +
- sizeof (pst->section_offsets->offsets) * (SECT_OFF_MAX-1));
-
- for (i = 0; i < SECT_OFF_MAX; i++)
- ANOFFSET (pst->section_offsets, i) = maybe->sections[i];
+ obstack_alloc (&objfile->objfile_obstack,
+ SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
+ for (i = 0; i < maybe->num_sections; i++)
+ (pst->section_offsets)->offsets[i] = maybe->sections[i];
return;
}
/* We were unable to find any offsets for this file. Complain. */
- if (dbx->stab_section_info) /* If there *is* any info, */
- complain (&stab_info_mismatch_complaint, filename);
+ if (dbx->stab_section_info) /* If there *is* any info, */
+ complaint (&symfile_complaints,
+ _("elf/stab section information missing for %s"), filename);
}
\f
/* Register that we are able to handle ELF object file formats. */
static struct sym_fns elf_sym_fns =
{
bfd_target_elf_flavour,
- elf_new_init, /* sym_new_init: init anything gbl to entire symtab */
- elf_symfile_init, /* sym_init: read initial info, setup for sym_read() */
- elf_symfile_read, /* sym_read: read a symbol file into symtab */
- elf_symfile_finish, /* sym_finish: finished with file, cleanup */
- elf_symfile_offsets, /* sym_offsets: Translate ext. to int. relocation */
- NULL /* next: pointer to next struct sym_fns */
+ elf_new_init, /* sym_new_init: init anything gbl to entire symtab */
+ elf_symfile_init, /* sym_init: read initial info, setup for sym_read() */
+ elf_symfile_read, /* sym_read: read a symbol file into symtab */
+ elf_symfile_finish, /* sym_finish: finished with file, cleanup */
+ default_symfile_offsets, /* sym_offsets: Translate ext. to int. relocation */
+ elf_symfile_segments, /* sym_segments: Get segment information from
+ a file. */
+ NULL /* next: pointer to next struct sym_fns */
};
void
-_initialize_elfread ()
+_initialize_elfread (void)
{
add_symtab_fns (&elf_sym_fns);
}