along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-/************************************************************************
- * *
- * NOTICE *
- * *
- * This file is still under construction. When it is complete, this *
- * notice will be removed. Until then, direct any questions or changes *
- * to Fred Fish at Cygnus Support (fnf@cygnus.com) *
- * *
- * FIXME Still needs support for shared libraries. *
- * FIXME Still needs support for core files. *
- * FIXME The ".debug" and ".line" section names are hardwired. *
- * *
- ************************************************************************/
-
#include "defs.h"
-#include "elf/common.h"
-#include "elf/external.h"
-#include "elf/internal.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 "libelf.h"
#include "symtab.h"
#include "symfile.h"
#include "objfiles.h"
#include "buildsym.h"
+#include "stabsread.h"
#include "gdb-stabs.h"
#include "complaints.h"
#include <string.h>
elf_symtab_read PARAMS ((bfd *, CORE_ADDR, struct objfile *));
static void
-free_elfinfo PARAMS ((PTR));
+free_elfinfo PARAMS ((void *));
static struct section_offsets *
elf_symfile_offsets PARAMS ((struct objfile *, CORE_ADDR));
struct objfile *));
static void
-elf_locate_sections PARAMS ((bfd *, asection *, PTR));
+elf_locate_sections PARAMS ((bfd *, asection *, void *));
/* We are called once per section from elf_symfile_read. We
need to examine each section we are passed, check to see
We also recognize the ".stab" sections used by the Sun compilers
released with Solaris 2.
- FIXME: The section names should not be hardwired strings. */
+ FIXME: The section names should not be hardwired strings (what
+ should they be? I don't think most object file formats have enough
+ section flags to specify what kind of debug section it is
+ -kingdon). */
static void
elf_locate_sections (ignore_abfd, sectp, eip)
char *info; /* FIXME, is this really char *? */
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;
+ 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;
+ }
+
name = obsavestring (name, strlen (name), &objfile -> symbol_obstack);
- prim_record_minimal_symbol_and_info (name, address, ms_type, info);
+ prim_record_minimal_symbol_and_info (name, address, ms_type, info, section);
}
/*
struct cleanup *back_to;
CORE_ADDR symaddr;
enum minimal_symbol_type ms_type;
- /* If sectinfo is nonzero, it contains section info that should end up
+ /* If sectinfo is nonNULL, it contains section info that should end up
filed in the objfile. */
- struct stab_section_info *sectinfo = 0;
+ struct stab_section_info *sectinfo = NULL;
/* If filesym is nonzero, it points to a file symbol, but we haven't
seen any section info for it yet. */
asymbol *filesym = 0;
struct dbx_symfile_info *dbx = (struct dbx_symfile_info *)
- objfile->sym_private;
+ objfile->sym_stab_info;
+ unsigned long size;
storage_needed = get_symtab_upper_bound (abfd);
-
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);
-
for (i = 0; i < number_of_symbols; i++)
{
sym = symbol_table[i];
- /* Select global/weak symbols that are defined in a specific section.
- Note that bfd now puts abs symbols in their own section, so
- all symbols we are interested in will have a section. */
- if ((sym -> flags & (BSF_GLOBAL | BSF_WEAK))
- && (sym -> section != NULL))
+ 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;
+ }
+ 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)
+ {
+ sectinfo -> next = dbx -> stab_section_info;
+ dbx -> stab_section_info = sectinfo;
+ sectinfo = NULL;
+ }
+ filesym = sym;
+ }
+ else if (sym -> flags & (BSF_GLOBAL | BSF_LOCAL | BSF_WEAK))
{
- symaddr = sym -> value;
+ /* 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)
- symaddr += addr;
-
+ {
+ symaddr += addr;
+ }
/* 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 -> flags & SEC_CODE)
+ if (sym -> section == &bfd_abs_section)
{
- ms_type = mst_text;
+ ms_type = mst_abs;
+ }
+ else if (sym -> section -> flags & SEC_CODE)
+ {
+ if (sym -> flags & BSF_GLOBAL)
+ {
+ ms_type = mst_text;
+ }
+ else if (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;
+ }
}
- else if (sym -> section -> flags & SEC_DATA)
+ else if (sym -> section -> flags & SEC_ALLOC)
{
- ms_type = mst_data;
+ 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. 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))
+ {
+ 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)
+ {
+ 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;
+ }
+ }
+ if (sectinfo -> sections[index] != 0)
+ {
+ complain (§ion_info_dup_complaint,
+ sectinfo -> filename);
+ }
+ /* 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;
+ }
+ }
+ else
+ {
+ 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 or data. */
+ is in. Ignore them if they aren't text, data, or bss. */
/* ms_type = mst_unknown; */
continue; /* Skip this symbol. */
}
/* Pass symbol size field in via BFD. FIXME!!! */
- record_minimal_symbol_and_info ((char *) sym -> name,
- symaddr, ms_type, sym->udata, objfile);
- }
-
- /* See if this is a debugging symbol that helps Solaris
- stabs-in-elf debugging. */
-
- else if (sym->flags & BSF_FILE)
- {
- /* Chain any old one onto the objfile; remember new sym. */
- if (sectinfo)
- {
- sectinfo->next = dbx->stab_section_info;
- dbx->stab_section_info = sectinfo;
- sectinfo = 0;
- }
- filesym = sym;
- }
- else if ((sym->flags & BSF_LOCAL) &&
- (sym->section) &&
- (sym->section->flags & SEC_DATA) &&
- (sym->name))
- {
- /* Named Local variable in a Data section. Check its name. */
- index = -1;
- switch (sym->name[1])
- {
- case 'b':
- if (STREQ ("Bbss.bss", sym->name))
- index = SECT_OFF_BSS;
- break;
- case 'd':
- if (STREQ ("Ddata.data", sym->name))
- index = SECT_OFF_DATA;
- break;
- case 'r':
- if (STREQ ("Drodata.rodata", sym->name))
- index = SECT_OFF_RODATA;
- break;
- }
- if (index > 0)
- {
- /* We have some new info. Allocate a sectinfo, if
- needed, and fill it in. */
- if (!sectinfo)
- {
- sectinfo = (struct stab_section_info *)
- xmmalloc (objfile -> md,
- sizeof (*sectinfo));
- memset ((PTR) sectinfo, 0, sizeof (*sectinfo));
- if (!filesym)
- complain (§ion_info_complaint, sym->name);
- else
- sectinfo->filename = (char *)filesym->name;
- }
- if (sectinfo->sections[index])
- complain (§ion_info_dup_complaint, sectinfo->filename);
-
- symaddr = sym -> value;
- /* Relocate all non-absolute symbols by base address. */
- if (sym -> section != &bfd_abs_section)
- symaddr += addr;
- sectinfo->sections[index] = symaddr;
- }
+ size = ((elf_symbol_type *) sym) -> internal_elf_sym.st_size;
+ record_minimal_symbol_and_info ((char *) sym -> name, symaddr,
+ ms_type, (PTR) size, objfile);
}
}
do_cleanups (back_to);
memset ((char *) &ei, 0, sizeof (ei));
/* Allocate struct to keep track of the symfile */
- objfile->sym_private = (PTR)
+ objfile->sym_stab_info = (PTR)
xmmalloc (objfile -> md, sizeof (struct dbx_symfile_info));
- memset ((char *) objfile->sym_private, 0, sizeof (struct dbx_symfile_info));
+ memset ((char *) objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info));
make_cleanup (free_elfinfo, (PTR) objfile);
/* Process the normal ELF symbol table first. This may write some
- chain of info into the dbx_symfile_info in objfile->sym_private,
+ chain of info into the dbx_symfile_info in objfile->sym_stab_info,
which can later be used by elfstab_offset_sections. */
/* FIXME, should take a section_offsets param, not just an offset. */
sections visible to the caller. So we have to search the
ELF section table, not the BFD section table, for the string
table. */
- struct elf_internal_shdr *elf_sect;
+ struct elf32_internal_shdr *elf_sect;
elf_sect = bfd_elf_find_section (abfd, ".stabstr");
if (elf_sect)
do_cleanups (back_to);
}
-/* This cleans up the objfile's sym_private pointer, and the chain of
+/* This cleans up the objfile's sym_stab_info pointer, and the chain of
stab_section_info's, that might be dangling from it. */
static void
{
struct objfile *objfile = (struct objfile *)objp;
struct dbx_symfile_info *dbxinfo = (struct dbx_symfile_info *)
- objfile->sym_private;
+ objfile->sym_stab_info;
struct stab_section_info *ssi, *nssi;
ssi = dbxinfo->stab_section_info;
elf_symfile_finish (objfile)
struct objfile *objfile;
{
- if (objfile -> sym_private != NULL)
+ if (objfile -> sym_stab_info != NULL)
{
- mfree (objfile -> md, objfile -> sym_private);
+ mfree (objfile -> md, objfile -> sym_stab_info);
}
}
{
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));
+ 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
{
char *filename = pst->filename;
struct dbx_symfile_info *dbx = (struct dbx_symfile_info *)
- objfile->sym_private;
+ objfile->sym_stab_info;
struct stab_section_info *maybe = dbx->stab_section_info;
struct stab_section_info *questionable = 0;
int i;
complain (&stab_info_mismatch_complaint, filename);
}
\f
-/* Register that we are able to handle ELF object file formats and DWARF
- debugging formats.
-
- Unlike other object file formats, where the debugging information format
- is implied by the object file format, the ELF object file format and the
- DWARF debugging information format are two distinct, and potentially
- separate entities. I.E. it is perfectly possible to have ELF objects
- with debugging formats other than DWARF. And it is conceivable that the
- DWARF debugging format might be used with another object file format,
- like COFF, by simply using COFF's custom section feature.
-
- GDB, and to a lesser extent BFD, should support the notion of separate
- object file formats and debugging information formats. For now, we just
- use "elf" in the same sense as "a.out" or "coff", to imply both the ELF
- object file format and the DWARF debugging format. */
+/* Register that we are able to handle ELF object file formats. */
static struct sym_fns elf_sym_fns =
{
projects / binutils-gdb.git / blobdiff