char *
find_separate_debug_file_by_buildid (struct objfile *objfile)
{
const struct elf_build_id *build_id;
build_id = build_id_bfd_get (objfile->obfd);
if (build_id != NULL)
{
bfd *abfd;
abfd = build_id_to_debug_bfd (build_id->size, build_id->data);
/* Prevent looping on a stripped .debug file. */
if (abfd != NULL
&& filename_cmp (bfd_get_filename (abfd),
objfile_name (objfile)) == 0)
{
warning (_("\"%s\": separate debug info file has no debug info"),
bfd_get_filename (abfd));
gdb_bfd_unref (abfd);
}
else if (abfd != NULL)
{
char *result = xstrdup (bfd_get_filename (abfd));
gdb_bfd_unref (abfd);
return result;
}
}
return NULL;
}
bfd *
find_separate_debug_file_in_section (struct objfile *objfile)
{
asection *section;
bfd *abfd;
if (objfile->obfd == NULL)
return NULL;
section = bfd_get_section_by_name (objfile->obfd, ".gnu_debugdata");
if (section == NULL)
return NULL;
#ifdef HAVE_LIBLZMA
abfd = gdb_bfd_openr_iovec (objfile_name (objfile), gnutarget, lzma_open,
section, lzma_pread, lzma_close, lzma_stat);
if (abfd == NULL)
return NULL;
if (!bfd_check_format (abfd, bfd_object))
{
warning (_("Cannot parse .gnu_debugdata section; not a BFD object"));
gdb_bfd_unref (abfd);
return NULL;
}
#else
warning (_("Cannot parse .gnu_debugdata section; LZMA support was "
"disabled at compile time"));
abfd = NULL;
#endif /* !HAVE_LIBLZMA */
return abfd;
}
static bfd *
darwin_bfd_open (char *pathname)
{
char *found_pathname;
int found_file;
bfd *abfd;
bfd *res;
/* Search for shared library file. */
found_pathname = solib_find (pathname, &found_file);
if (found_pathname == NULL)
perror_with_name (pathname);
/* Open bfd for shared library. */
abfd = solib_bfd_fopen (found_pathname, found_file);
res = gdb_bfd_mach_o_fat_extract (abfd, bfd_object,
gdbarch_bfd_arch_info (target_gdbarch ()));
if (!res)
{
make_cleanup_bfd_unref (abfd);
error (_("`%s': not a shared-library: %s"),
bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
}
/* The current filename for fat-binary BFDs is a name generated
by BFD, usually a string containing the name of the architecture.
Reset its value to the actual filename. */
xfree (bfd_get_filename (res));
res->filename = xstrdup (pathname);
gdb_bfd_unref (abfd);
return res;
}
static void
core_close (struct target_ops *self)
{
if (core_bfd)
{
int pid = ptid_get_pid (inferior_ptid);
inferior_ptid = null_ptid; /* Avoid confusion from thread
stuff. */
if (pid != 0)
exit_inferior_silent (pid);
/* Clear out solib state while the bfd is still open. See
comments in clear_solib in solib.c. */
clear_solib ();
if (core_data)
{
xfree (core_data->sections);
xfree (core_data);
core_data = NULL;
}
gdb_bfd_unref (core_bfd);
core_bfd = NULL;
}
core_vec = NULL;
core_gdbarch = NULL;
}
static void
do_bfd_delete_cleanup (void *arg)
{
bfd *obfd = arg;
const char *filename = obfd->filename;
gdb_bfd_unref (arg);
unlink (filename);
}
static void
target_bfd_xclose (struct target_ops *t)
{
struct target_bfd_data *data = t->to_data;
gdb_bfd_unref (data->bfd);
xfree (data->table.sections);
xfree (data);
xfree (t);
}
static void
exec_close_1 (int quitting)
{
struct vmap *vp, *nxt;
using_exec_ops = 0;
for (nxt = vmap; nxt != NULL;)
{
vp = nxt;
nxt = vp->nxt;
if (vp->objfile)
free_objfile (vp->objfile);
gdb_bfd_unref (vp->bfd);
xfree (vp);
}
vmap = NULL;
{
struct program_space *ss;
struct cleanup *old_chain;
old_chain = save_current_program_space ();
ALL_PSPACES (ss)
{
set_current_program_space (ss);
/* Delete all target sections. */
resize_section_table
(current_target_sections,
-resize_section_table (current_target_sections, 0));
exec_close ();
}
do_cleanups (old_chain);
}
}
void
exec_close (void)
{
if (exec_bfd)
{
bfd *abfd = exec_bfd;
gdb_bfd_unref (abfd);
/* Removing target sections may close the exec_ops target.
Clear exec_bfd before doing so to prevent recursion. */
exec_bfd = NULL;
exec_bfd_mtime = 0;
remove_target_sections (&exec_bfd);
xfree (exec_filename);
exec_filename = NULL;
}
}
static void
gcore_command (char *args, int from_tty)
{
struct cleanup *filename_chain;
struct cleanup *bfd_chain;
char *corefilename;
bfd *obfd;
/* No use generating a corefile without a target process. */
if (!target_has_execution)
noprocess ();
if (args && *args)
corefilename = tilde_expand (args);
else
{
/* Default corefile name is "core.PID". */
corefilename = xstrprintf ("core.%d", ptid_get_pid (inferior_ptid));
}
filename_chain = make_cleanup (xfree, corefilename);
if (info_verbose)
fprintf_filtered (gdb_stdout,
"Opening corefile '%s' for output.\n", corefilename);
/* Open the output file. */
obfd = create_gcore_bfd (corefilename);
/* Need a cleanup that will close and delete the file. */
bfd_chain = make_cleanup (do_bfd_delete_cleanup, obfd);
/* Call worker function. */
write_gcore_file (obfd);
/* Succeeded. */
discard_cleanups (bfd_chain);
gdb_bfd_unref (obfd);
fprintf_filtered (gdb_stdout, "Saved corefile %s\n", corefilename);
do_cleanups (filename_chain);
}
static void
gcore_command (char *args, int from_tty)
{
struct cleanup *old_chain;
char *corefilename, corefilename_buffer[40];
bfd *obfd;
/* No use generating a corefile without a target process. */
if (!target_has_execution)
noprocess ();
if (args && *args)
corefilename = args;
else
{
/* Default corefile name is "core.PID". */
xsnprintf (corefilename_buffer, sizeof (corefilename_buffer),
"core.%d", PIDGET (inferior_ptid));
corefilename = corefilename_buffer;
}
if (info_verbose)
fprintf_filtered (gdb_stdout,
"Opening corefile '%s' for output.\n", corefilename);
/* Open the output file. */
obfd = create_gcore_bfd (corefilename);
/* Need a cleanup that will close and delete the file. */
old_chain = make_cleanup (do_bfd_delete_cleanup, obfd);
/* Call worker function. */
write_gcore_file (obfd);
/* Succeeded. */
fprintf_filtered (gdb_stdout, "Saved corefile %s\n", corefilename);
discard_cleanups (old_chain);
gdb_bfd_unref (obfd);
}
static bfd *
spu_bfd_fopen (char *name, CORE_ADDR addr)
{
bfd *nbfd;
CORE_ADDR *open_closure = XNEW (CORE_ADDR);
*open_closure = addr;
nbfd = gdb_bfd_openr_iovec (name, "elf32-spu",
spu_bfd_iovec_open, open_closure,
spu_bfd_iovec_pread, spu_bfd_iovec_close,
spu_bfd_iovec_stat);
if (!nbfd)
return NULL;
if (!bfd_check_format (nbfd, bfd_object))
{
gdb_bfd_unref (nbfd);
return NULL;
}
return nbfd;
}
bfd *
build_id_to_debug_bfd (size_t build_id_len, const bfd_byte *build_id)
{
char *link, *debugdir;
VEC (char_ptr) *debugdir_vec;
struct cleanup *back_to;
int ix;
bfd *abfd = NULL;
/* DEBUG_FILE_DIRECTORY/.build-id/ab/cdef */
link = alloca (strlen (debug_file_directory) + (sizeof "/.build-id/" - 1) + 1
+ 2 * build_id_len + (sizeof ".debug" - 1) + 1);
/* Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
cause "/.build-id/..." lookups. */
debugdir_vec = dirnames_to_char_ptr_vec (debug_file_directory);
back_to = make_cleanup_free_char_ptr_vec (debugdir_vec);
for (ix = 0; VEC_iterate (char_ptr, debugdir_vec, ix, debugdir); ++ix)
{
size_t debugdir_len = strlen (debugdir);
const gdb_byte *data = build_id;
size_t size = build_id_len;
char *s;
char *filename = NULL;
memcpy (link, debugdir, debugdir_len);
s = &link[debugdir_len];
s += sprintf (s, "/.build-id/");
if (size > 0)
{
size--;
s += sprintf (s, "%02x", (unsigned) *data++);
}
if (size > 0)
*s++ = '/';
while (size-- > 0)
s += sprintf (s, "%02x", (unsigned) *data++);
strcpy (s, ".debug");
/* lrealpath() is expensive even for the usually non-existent files. */
if (access (link, F_OK) == 0)
filename = lrealpath (link);
if (filename == NULL)
continue;
/* We expect to be silent on the non-existing files. */
abfd = gdb_bfd_open_maybe_remote (filename);
if (abfd == NULL)
continue;
if (build_id_verify (abfd, build_id_len, build_id))
break;
gdb_bfd_unref (abfd);
abfd = NULL;
}
do_cleanups (back_to);
return abfd;
}
static int
enable_break2 (void)
{
enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
int success = 0;
char **bkpt_namep;
asection *interp_sect;
struct dsbt_info *info = get_dsbt_info ();
if (exec_bfd == NULL)
return 0;
if (!target_has_execution)
return 0;
if (info->enable_break2_done)
return 1;
info->interp_text_sect_low = 0;
info->interp_text_sect_high = 0;
info->interp_plt_sect_low = 0;
info->interp_plt_sect_high = 0;
/* Find the .interp section; if not found, warn the user and drop
into the old breakpoint at symbol code. */
interp_sect = bfd_get_section_by_name (exec_bfd, ".interp");
if (interp_sect)
{
unsigned int interp_sect_size;
char *buf;
bfd *tmp_bfd = NULL;
CORE_ADDR addr;
gdb_byte addr_buf[TIC6X_PTR_SIZE];
struct int_elf32_dsbt_loadmap *ldm;
volatile struct gdb_exception ex;
/* Read the contents of the .interp section into a local buffer;
the contents specify the dynamic linker this program uses. */
interp_sect_size = bfd_section_size (exec_bfd, interp_sect);
buf = alloca (interp_sect_size);
bfd_get_section_contents (exec_bfd, interp_sect,
buf, 0, interp_sect_size);
/* Now we need to figure out where the dynamic linker was
loaded so that we can load its symbols and place a breakpoint
in the dynamic linker itself. */
TRY_CATCH (ex, RETURN_MASK_ALL)
{
tmp_bfd = solib_bfd_open (buf);
}
if (tmp_bfd == NULL)
{
enable_break_failure_warning ();
return 0;
}
dsbt_get_initial_loadmaps ();
ldm = info->interp_loadmap;
/* Record the relocated start and end address of the dynamic linker
text and plt section for dsbt_in_dynsym_resolve_code. */
interp_sect = bfd_get_section_by_name (tmp_bfd, ".text");
if (interp_sect)
{
info->interp_text_sect_low
= bfd_section_vma (tmp_bfd, interp_sect);
info->interp_text_sect_low
+= displacement_from_map (ldm, info->interp_text_sect_low);
info->interp_text_sect_high
= info->interp_text_sect_low
+ bfd_section_size (tmp_bfd, interp_sect);
}
interp_sect = bfd_get_section_by_name (tmp_bfd, ".plt");
if (interp_sect)
{
info->interp_plt_sect_low =
bfd_section_vma (tmp_bfd, interp_sect);
info->interp_plt_sect_low
+= displacement_from_map (ldm, info->interp_plt_sect_low);
info->interp_plt_sect_high =
info->interp_plt_sect_low + bfd_section_size (tmp_bfd, interp_sect);
}
addr = gdb_bfd_lookup_symbol (tmp_bfd, cmp_name, "_dl_debug_addr");
if (addr == 0)
{
warning (_("Could not find symbol _dl_debug_addr in dynamic linker"));
enable_break_failure_warning ();
gdb_bfd_unref (tmp_bfd);
return 0;
}
if (solib_dsbt_debug)
fprintf_unfiltered (gdb_stdlog,
"enable_break: _dl_debug_addr (prior to relocation) = %s\n",
hex_string_custom (addr, 8));
addr += displacement_from_map (ldm, addr);
if (solib_dsbt_debug)
fprintf_unfiltered (gdb_stdlog,
"enable_break: _dl_debug_addr (after relocation) = %s\n",
hex_string_custom (addr, 8));
/* Fetch the address of the r_debug struct. */
if (target_read_memory (addr, addr_buf, sizeof addr_buf) != 0)
{
warning (_("Unable to fetch contents of _dl_debug_addr "
"(at address %s) from dynamic linker"),
hex_string_custom (addr, 8));
}
addr = extract_unsigned_integer (addr_buf, sizeof addr_buf, byte_order);
if (solib_dsbt_debug)
fprintf_unfiltered (gdb_stdlog,
"enable_break: _dl_debug_addr[0..3] = %s\n",
hex_string_custom (addr, 8));
/* If it's zero, then the ldso hasn't initialized yet, and so
there are no shared libs yet loaded. */
if (addr == 0)
{
if (solib_dsbt_debug)
fprintf_unfiltered (gdb_stdlog,
"enable_break: ldso not yet initialized\n");
/* Do not warn, but mark to run again. */
return 0;
}
/* Fetch the r_brk field. It's 8 bytes from the start of
_dl_debug_addr. */
if (target_read_memory (addr + 8, addr_buf, sizeof addr_buf) != 0)
{
warning (_("Unable to fetch _dl_debug_addr->r_brk "
"(at address %s) from dynamic linker"),
hex_string_custom (addr + 8, 8));
enable_break_failure_warning ();
gdb_bfd_unref (tmp_bfd);
return 0;
}
addr = extract_unsigned_integer (addr_buf, sizeof addr_buf, byte_order);
/* We're done with the temporary bfd. */
gdb_bfd_unref (tmp_bfd);
/* We're also done with the loadmap. */
xfree (ldm);
/* Remove all the solib event breakpoints. Their addresses
may have changed since the last time we ran the program. */
remove_solib_event_breakpoints ();
/* Now (finally!) create the solib breakpoint. */
create_solib_event_breakpoint (target_gdbarch (), addr);
info->enable_break2_done = 1;
return 1;
}
static int
enable_break (void)
{
enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
asection *interp_sect;
struct dsbt_info *info;
if (exec_bfd == NULL)
return 0;
if (!target_has_execution)
return 0;
info = get_dsbt_info ();
info->interp_text_sect_low = 0;
info->interp_text_sect_high = 0;
info->interp_plt_sect_low = 0;
info->interp_plt_sect_high = 0;
/* Find the .interp section; if not found, warn the user and drop
into the old breakpoint at symbol code. */
interp_sect = bfd_get_section_by_name (exec_bfd, ".interp");
if (interp_sect)
{
unsigned int interp_sect_size;
char *buf;
bfd *tmp_bfd = NULL;
CORE_ADDR addr;
gdb_byte addr_buf[TIC6X_PTR_SIZE];
struct int_elf32_dsbt_loadmap *ldm;
volatile struct gdb_exception ex;
int ret;
/* Read the contents of the .interp section into a local buffer;
the contents specify the dynamic linker this program uses. */
interp_sect_size = bfd_section_size (exec_bfd, interp_sect);
buf = alloca (interp_sect_size);
bfd_get_section_contents (exec_bfd, interp_sect,
buf, 0, interp_sect_size);
/* Now we need to figure out where the dynamic linker was
loaded so that we can load its symbols and place a breakpoint
in the dynamic linker itself. */
TRY_CATCH (ex, RETURN_MASK_ALL)
{
tmp_bfd = solib_bfd_open (buf);
}
if (tmp_bfd == NULL)
{
enable_break_failure_warning ();
return 0;
}
dsbt_get_initial_loadmaps ();
ldm = info->interp_loadmap;
/* Record the relocated start and end address of the dynamic linker
text and plt section for dsbt_in_dynsym_resolve_code. */
interp_sect = bfd_get_section_by_name (tmp_bfd, ".text");
if (interp_sect)
{
info->interp_text_sect_low
= bfd_section_vma (tmp_bfd, interp_sect);
info->interp_text_sect_low
+= displacement_from_map (ldm, info->interp_text_sect_low);
info->interp_text_sect_high
= info->interp_text_sect_low
+ bfd_section_size (tmp_bfd, interp_sect);
}
interp_sect = bfd_get_section_by_name (tmp_bfd, ".plt");
if (interp_sect)
{
info->interp_plt_sect_low =
bfd_section_vma (tmp_bfd, interp_sect);
info->interp_plt_sect_low
+= displacement_from_map (ldm, info->interp_plt_sect_low);
info->interp_plt_sect_high =
info->interp_plt_sect_low + bfd_section_size (tmp_bfd, interp_sect);
}
addr = gdb_bfd_lookup_symbol (tmp_bfd, cmp_name, "_dl_debug_state");
if (addr != 0)
{
if (solib_dsbt_debug)
fprintf_unfiltered (gdb_stdlog,
"enable_break: _dl_debug_state (prior to relocation) = %s\n",
hex_string_custom (addr, 8));
addr += displacement_from_map (ldm, addr);
if (solib_dsbt_debug)
fprintf_unfiltered (gdb_stdlog,
"enable_break: _dl_debug_state (after relocation) = %s\n",
hex_string_custom (addr, 8));
/* Now (finally!) create the solib breakpoint. */
create_solib_event_breakpoint (target_gdbarch (), addr);
ret = 1;
}
else
{
if (solib_dsbt_debug)
fprintf_unfiltered (gdb_stdlog,
"enable_break: _dl_debug_state is not found\n");
ret = 0;
}
/* We're done with the temporary bfd. */
gdb_bfd_unref (tmp_bfd);
/* We're also done with the loadmap. */
xfree (ldm);
return ret;
}
static struct vmap *
add_vmap (LdInfo *ldi)
{
bfd *abfd, *last;
char *mem, *filename;
struct objfile *obj;
struct vmap *vp;
int fd;
ARCH64_DECL (arch64);
/* This ldi structure was allocated using alloca() in
xcoff_relocate_symtab(). Now we need to have persistent object
and member names, so we should save them. */
filename = LDI_FILENAME (ldi, arch64);
mem = filename + strlen (filename) + 1;
mem = xstrdup (mem);
fd = LDI_FD (ldi, arch64);
abfd = gdb_bfd_open (filename, gnutarget, fd < 0 ? -1 : fd);
if (!abfd)
{
warning (_("Could not open `%s' as an executable file: %s"),
filename, bfd_errmsg (bfd_get_error ()));
return NULL;
}
/* Make sure we have an object file. */
if (bfd_check_format (abfd, bfd_object))
vp = map_vmap (abfd, 0);
else if (bfd_check_format (abfd, bfd_archive))
{
last = gdb_bfd_openr_next_archived_file (abfd, NULL);
while (last != NULL)
{
bfd *next;
if (strcmp (mem, last->filename) == 0)
break;
next = gdb_bfd_openr_next_archived_file (abfd, last);
gdb_bfd_unref (last);
last = next;
}
if (!last)
{
warning (_("\"%s\": member \"%s\" missing."), filename, mem);
gdb_bfd_unref (abfd);
return NULL;
}
if (!bfd_check_format (last, bfd_object))
{
warning (_("\"%s\": member \"%s\" not in executable format: %s."),
filename, mem, bfd_errmsg (bfd_get_error ()));
gdb_bfd_unref (last);
gdb_bfd_unref (abfd);
return NULL;
}
vp = map_vmap (last, abfd);
/* map_vmap acquired a reference to LAST, so we can release
ours. */
gdb_bfd_unref (last);
}
else
{
warning (_("\"%s\": not in executable format: %s."),
filename, bfd_errmsg (bfd_get_error ()));
gdb_bfd_unref (abfd);
return NULL;
}
obj = allocate_objfile (vp->bfd, 0);
vp->objfile = obj;
/* Always add symbols for the main objfile. */
if (vp == vmap || auto_solib_add)
vmap_add_symbols (vp);
/* Anything needing a reference to ABFD has already acquired it, so
release our local reference. */
gdb_bfd_unref (abfd);
return vp;
}
