/* Read ELF (Executable and Linking Format) object files for GDB.
- Copyright 1991, 1992 Free Software Foundation, Inc.
+ Copyright 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
Written by Fred Fish at Cygnus Support.
This file is part of GDB.
#include "defs.h"
#include "bfd.h"
-#include <time.h> /* For time_t in libbfd.h. */
-#include <sys/types.h> /* For time_t, if not in time.h. */
-#include "libbfd.h" /* For bfd_elf_find_section */
+#include <string.h>
#include "libelf.h"
+#include "elf/mips.h"
#include "symtab.h"
#include "symfile.h"
#include "objfiles.h"
#include "stabsread.h"
#include "gdb-stabs.h"
#include "complaints.h"
-#include <string.h>
#include "demangle.h"
/* The struct elfinfo is available only during ELF symbol table and
elf_symfile_finish PARAMS ((struct objfile *));
static void
-elf_symtab_read PARAMS ((bfd *, CORE_ADDR, struct objfile *));
+elf_symtab_read PARAMS ((bfd *, CORE_ADDR, struct objfile *, int));
static void
free_elfinfo PARAMS ((void *));
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:
*/
static void
-elf_symtab_read (abfd, addr, objfile)
+elf_symtab_read (abfd, addr, objfile, dynamic)
bfd *abfd;
CORE_ADDR addr;
struct objfile *objfile;
+ int dynamic;
{
- unsigned int storage_needed;
+ long storage_needed;
asymbol *sym;
asymbol **symbol_table;
- unsigned int number_of_symbols;
- unsigned int i;
+ long number_of_symbols;
+ long i;
int index;
struct cleanup *back_to;
CORE_ADDR symaddr;
struct dbx_symfile_info *dbx = (struct dbx_symfile_info *)
objfile->sym_stab_info;
unsigned long size;
-
- storage_needed = get_symtab_upper_bound (abfd);
+ int stripped = (bfd_get_symcount (abfd) == 0);
+
+ if (dynamic)
+ {
+ storage_needed = bfd_get_dynamic_symtab_upper_bound (abfd);
+
+ /* 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)
{
symbol_table = (asymbol **) xmalloc (storage_needed);
back_to = make_cleanup (free, symbol_table);
- number_of_symbols = bfd_canonicalize_symtab (abfd, 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];
that are null strings (may happen). */
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.
+ On Irix 5 however, the symbols for the procedure linkage
+ table entries have meaningful values only in the dynamic
+ symbol table, so we always examine undefined symbols. */
+ if (dynamic && !stripped && sym -> section != &bfd_und_section)
+ continue;
if (sym -> flags & BSF_FILE)
{
/* STT_FILE debugging symbol that helps stabs-in-elf debugging.
/* 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)
+ if (sym -> section == &bfd_und_section
+ && (sym -> flags & BSF_GLOBAL)
+ && (sym -> flags & BSF_FUNCTION))
{
- ms_type = mst_abs;
+ /* Symbol is a reference to a function defined in
+ a shared library.
+ If its value is non zero then it is usually the
+ absolute address of the corresponding entry in
+ the procedure linkage table.
+ 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.
+ Irix 5 has a zero value for all shared library functions
+ in the main symbol table, but the dynamic symbol table
+ provides the right values. */
+ ms_type = mst_solib_trampoline;
+ symaddr = sym -> value;
+ if (symaddr == 0)
+ continue;
+ symaddr += addr;
+ }
+ else if (sym -> section == &bfd_abs_section)
+ {
+ /* 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;
+ }
}
else if (sym -> section -> flags & SEC_CODE)
{
/* FIXME, should take a section_offsets param, not just an offset. */
offset = ANOFFSET (section_offsets, 0);
- elf_symtab_read (abfd, offset, objfile);
+ elf_symtab_read (abfd, offset, objfile, 0);
+
+ /* Add the dynamic symbols. */
+
+ elf_symtab_read (abfd, offset, objfile, 1);
/* Now process debugging information, which is contained in
special ELF sections. We first have to find them... */
}
if (ei.stabsect)
{
- /* STABS sections */
-
- /* FIXME: Sun didn't really know how to implement this well.
- They made .stab sections that don't point to the .stabstr
- section with the sh_link field. BFD doesn't make string table
- sections visible to the caller. So we have to search the
- ELF section table, not the BFD section table, for the string
- table. */
- struct elf32_internal_shdr *elf_sect;
-
- elf_sect = bfd_elf_find_section (abfd, ".stabstr");
- if (elf_sect)
+ asection *str_sect;
+
+ /* Stab sections have an associated string table that looks like
+ 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, /* .stab offset */
- bfd_get_section_size_before_reloc (ei.stabsect),/* .stab size */
- (file_ptr) elf_sect->sh_offset, /* .stabstr offset */
- elf_sect->sh_size); /* .stabstr size */
+ section_offsets,
+ mainline,
+ ei.stabsect->filepos,
+ bfd_section_size (abfd, ei.stabsect),
+ str_sect->filepos,
+ bfd_section_size (abfd, str_sect));
}
if (ei.mdebugsect)
{
section_offsets);
}
- if (!have_partial_symbols ())
- {
- wrap_here ("");
- printf_filtered ("(no debugging symbols found)...");
- wrap_here ("");
- }
-
/* Install any minimal symbols that have been collected as the current
minimal symbols for this objfile. */
projects / deliverable / binutils-gdb.git / blobdiff