/* Read ELF (Executable and Linking Format) object files for GDB.
- Copyright 1991, 1992, 1993, 1994, 1995, 1996 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 3 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, see <http://www.gnu.org/licenses/>. */
#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 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_complaint =
- {"elf/stab section information %s without a preceding file symbol", 0, 0};
+static void free_elfinfo (void *);
-struct complaint section_info_dup_complaint =
- {"duplicated elf/stab section information for %s", 0, 0};
+/* Locate the segments in ABFD. */
-struct complaint stab_info_mismatch_complaint =
- {"elf/stab section information missing for %s", 0, 0};
-
-struct complaint stab_info_questionable_complaint =
- {"elf/stab section information questionable for %s", 0, 0};
-
-static void
-elf_symfile_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_new_init PARAMS ((struct objfile *));
+ num_sections = bfd_count_sections (abfd);
+ data->segment_info = XCALLOC (num_sections, int);
-static void
-elf_symfile_read PARAMS ((struct objfile *, struct section_offsets *, int));
+ for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
+ {
+ int j;
+ CORE_ADDR vma;
-static void
-elf_symfile_finish PARAMS ((struct objfile *));
+ if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0)
+ continue;
-static void
-elf_symtab_read PARAMS ((bfd *, CORE_ADDR, struct objfile *, int));
+ vma = bfd_get_section_vma (abfd, sect);
-static void
-free_elfinfo PARAMS ((void *));
+ 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"))
- {
- ei -> lnoffset = sectp -> filepos;
- ei -> lnsize = bfd_get_section_size_before_reloc (sectp);
- }
- else if (STREQ (sectp -> name, ".stab"))
+ if (strcmp (sectp->name, ".stab") == 0)
{
- ei -> stabsect = sectp;
+ ei->stabsect = sectp;
}
- else if (STREQ (sectp -> name, ".stab.index"))
+ else if (strcmp (sectp->name, ".stab.index") == 0)
{
- ei -> stabindexsect = sectp;
+ ei->stabindexsect = sectp;
}
- else if (STREQ (sectp -> name, ".mdebug"))
+ else if (strcmp (sectp->name, ".mdebug") == 0)
{
- ei -> mdebugsect = sectp;
+ 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)
- {
- 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;
- }
- }
- 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);
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. */
/* If filesym is nonzero, it points to a file symbol, but we haven't
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);
-#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);
+ /* Name of filesym, as saved on the objfile_obstack. */
+ char *filesymname = obsavestring ("", 0, &objfile->objfile_obstack);
+ 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
- {
- 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)
+ for (i = 0; i < number_of_symbols; i++)
{
- 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')
+ {
+ /* 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;
+
+ 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);
+ if (msym != NULL)
+ msym->filename = filesymname;
+ 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)
{
- sym = symbol_table[i];
- if (sym -> name == NULL || *sym -> name == '\0')
+ /* STT_FILE debugging symbol that helps stabs-in-elf debugging.
+ Chain any old one onto the objfile; remember new sym. */
+ if (sectinfo != NULL)
{
- /* Skip names that don't exist (shouldn't happen), or names
- that are null strings (may happen). */
- continue;
+ sectinfo->next = dbx->stab_section_info;
+ dbx->stab_section_info = sectinfo;
+ sectinfo = NULL;
}
-
- if (dynamic
- && sym -> section == &bfd_und_section
- && (sym -> flags & BSF_FUNCTION))
+ filesym = sym;
+ filesymname =
+ obsavestring ((char *) filesym->name, strlen (filesym->name),
+ &objfile->objfile_obstack);
+ }
+ 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)
{
- 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);
-#ifdef SOFUN_ADDRESS_MAYBE_MISSING
- if (msym != NULL)
- msym->filename = filesymname;
-#endif
- continue;
+ 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);
-#ifdef SOFUN_ADDRESS_MAYBE_MISSING
- if (msym != NULL)
- msym->filename = filesymname;
-#endif
+ unsigned long size = ((elf_symbol_type *) sym)->internal_elf_sym.st_size;
+ MSYMBOL_SIZE(msym) = size;
}
+ if (msym != NULL)
+ msym->filename = filesymname;
+ 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. */
- bfd_map_over_sections (abfd, elf_locate_sections, (PTR) &ei);
- if (ei.dboffset && ei.lnoffset)
+ /* 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)
{
- /* DWARF sections */
- dwarf_build_psymtabs (objfile,
- section_offsets, mainline,
- ei.dboffset, ei.dbsize,
- ei.lnoffset, ei.lnsize);
+ init_psymbol_list (objfile, 0);
+ mainline = 0;
+ }
+
+ /* We first have to find them... */
+ bfd_map_over_sections (abfd, elf_locate_sections, (void *) & ei);
+
+ /* 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)
+ {
+ 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);
}
+
+ dwarf2_free_objfile (objfile);
}
/* ELF specific initialization routine for reading symbols.
just a stub. */
static void
-elf_symfile_init (objfile)
- struct objfile *objfile;
+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
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 */
- default_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, /* sym_read_linetable */
+ NULL /* next: pointer to next struct sym_fns */
};
void
-_initialize_elfread ()
+_initialize_elfread (void)
{
add_symtab_fns (&elf_sym_fns);
}
projects / deliverable / binutils-gdb.git / blobdiff