static void
elf_symfile_read (struct objfile *objfile, int mainline)
{
bfd *abfd = objfile->obfd;
struct elfinfo ei;
struct cleanup *back_to;
CORE_ADDR offset;
init_minimal_symbol_collection ();
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 = (struct dbx_symfile_info *)
xmmalloc (objfile->md, sizeof (struct dbx_symfile_info));
memset ((char *) objfile->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,
which can later be used by elfstab_offset_sections. */
elf_symtab_read (objfile, 0);
/* Add the dynamic symbols. */
elf_symtab_read (objfile, 1);
/* 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. */
/* 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);
/* 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. */
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,
mainline,
ei.stabsect,
str_sect->filepos,
bfd_section_size (abfd, str_sect));
}
if (dwarf2_has_info (abfd))
{
/* DWARF 2 sections */
dwarf2_build_psymtabs (objfile, mainline);
}
else if (ei.dboffset && ei.lnoffset)
{
/* DWARF sections */
dwarf_build_psymtabs (objfile,
mainline,
ei.dboffset, ei.dbsize,
ei.lnoffset, ei.lnsize);
}
/* FIXME: kettenis/20030504: This still needs to be integrated with
dwarf2read.c in a better way. */
dwarf2_build_frame_info (objfile);
}
static void
macho_symfile_read (struct objfile *objfile, symfile_add_flags symfile_flags)
{
bfd *abfd = objfile->obfd;
long storage_needed;
std::vector<oso_el> oso_vector;
/* We have to hold on to the symbol table until the call to
macho_symfile_read_all_oso at the end of this function. */
gdb::def_vector<asymbol *> symbol_table;
/* Get symbols from the symbol table only if the file is an executable.
The symbol table of object files is not relocated and is expected to
be in the executable. */
if (bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC))
{
std::string dsym_filename;
/* Process the normal symbol table first. */
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)
{
long symcount;
symbol_table.resize (storage_needed / sizeof (asymbol *));
minimal_symbol_reader reader (objfile);
symcount = bfd_canonicalize_symtab (objfile->obfd,
symbol_table.data ());
if (symcount < 0)
error (_("Can't read symbols from %s: %s"),
bfd_get_filename (objfile->obfd),
bfd_errmsg (bfd_get_error ()));
macho_symtab_read (reader, objfile, symcount, symbol_table.data (),
&oso_vector);
reader.install ();
}
/* Try to read .eh_frame / .debug_frame. */
/* First, locate these sections. We ignore the result status
as it only checks for debug info. */
dwarf2_has_info (objfile, NULL);
dwarf2_build_frame_info (objfile);
/* Check for DSYM file. */
gdb_bfd_ref_ptr dsym_bfd (macho_check_dsym (objfile, &dsym_filename));
if (dsym_bfd != NULL)
{
struct bfd_section *asect, *dsect;
if (mach_o_debug_level > 0)
printf_unfiltered (_("dsym file found\n"));
/* Set dsym section size. */
for (asect = objfile->obfd->sections, dsect = dsym_bfd->sections;
asect && dsect;
asect = asect->next, dsect = dsect->next)
{
if (strcmp (asect->name, dsect->name) != 0)
break;
bfd_set_section_size (dsym_bfd.get (), dsect,
bfd_get_section_size (asect));
}
/* Add the dsym file as a separate file. */
symbol_file_add_separate (dsym_bfd.get (), dsym_filename.c_str (),
symfile_flags, objfile);
/* Don't try to read dwarf2 from main file or shared libraries. */
return;
}
}
if (dwarf2_has_info (objfile, NULL))
{
/* DWARF 2 sections */
dwarf2_build_psymtabs (objfile);
}
/* Then the oso. */
if (!oso_vector.empty ())
macho_symfile_read_all_oso (&oso_vector, objfile, symfile_flags);
}
