static void
darwin_load_image_infos (struct darwin_info *info)
{
gdb_byte buf[24];
enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr;
int len;
/* If the structure address is not known, don't continue. */
if (info->all_image_addr == 0)
return;
/* The structure has 4 fields: version (4 bytes), count (4 bytes),
info (pointer) and notifier (pointer). */
len = 4 + 4 + 2 * TYPE_LENGTH (ptr_type);
gdb_assert (len <= sizeof (buf));
memset (&info->all_image, 0, sizeof (info->all_image));
/* Read structure raw bytes from target. */
if (target_read_memory (info->all_image_addr, buf, len))
return;
/* Extract the fields. */
info->all_image.version = extract_unsigned_integer (buf, 4, byte_order);
if (!darwin_dyld_version_ok (info))
return;
info->all_image.count = extract_unsigned_integer (buf + 4, 4, byte_order);
info->all_image.info = extract_typed_address (buf + 8, ptr_type);
info->all_image.notifier = extract_typed_address
(buf + 8 + TYPE_LENGTH (ptr_type), ptr_type);
}
static void
darwin_solib_create_inferior_hook (int from_tty)
{
struct darwin_info *info = get_darwin_info ();
CORE_ADDR load_addr;
info->all_image_addr = 0;
darwin_solib_read_all_image_info_addr (info);
if (info->all_image_addr == 0)
darwin_solib_get_all_image_info_addr_at_init (info);
if (info->all_image_addr == 0)
return;
darwin_load_image_infos (info);
if (!darwin_dyld_version_ok (info))
{
warning (_("unhandled dyld version (%d)"), info->all_image.version);
return;
}
/* Add the breakpoint which is hit by dyld when the list of solib is
modified. */
create_solib_event_breakpoint (target_gdbarch (), info->all_image.notifier);
if (info->all_image.count != 0)
{
/* Possible relocate the main executable (PIE). */
load_addr = darwin_read_exec_load_addr_from_dyld (info);
}
else
{
/* Possible issue:
Do not break on the notifier if dyld is not initialized (deduced from
count == 0). In that case, dyld hasn't relocated itself and the
notifier may point to a wrong address. */
load_addr = darwin_read_exec_load_addr_at_init (info);
}
if (load_addr != 0 && symfile_objfile != NULL)
{
CORE_ADDR vmaddr;
/* Find the base address of the executable. */
vmaddr = bfd_mach_o_get_base_address (exec_bfd);
/* Relocate. */
if (vmaddr != load_addr)
objfile_rebase (symfile_objfile, load_addr - vmaddr);
}
}
static void
darwin_solib_create_inferior_hook (int from_tty)
{
struct darwin_info *info = get_darwin_info ();
CORE_ADDR load_addr;
info->all_image_addr = 0;
darwin_solib_read_all_image_info_addr (info);
if (info->all_image_addr == 0)
darwin_solib_get_all_image_info_addr_at_init (info);
if (info->all_image_addr == 0)
return;
darwin_load_image_infos (info);
if (!darwin_dyld_version_ok (info))
{
warning (_("unhandled dyld version (%d)"), info->all_image.version);
return;
}
create_solib_event_breakpoint (target_gdbarch (), info->all_image.notifier);
/* Possible relocate the main executable (PIE). */
load_addr = darwin_read_exec_load_addr (info);
if (load_addr != 0 && symfile_objfile != NULL)
{
CORE_ADDR vmaddr;
/* Find the base address of the executable. */
vmaddr = bfd_mach_o_get_base_address (exec_bfd);
/* Relocate. */
if (vmaddr != load_addr)
objfile_rebase (symfile_objfile, load_addr - vmaddr);
}
}
static struct so_list *
darwin_current_sos (void)
{
struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr;
enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
int ptr_len = TYPE_LENGTH (ptr_type);
unsigned int image_info_size;
struct so_list *head = NULL;
struct so_list *tail = NULL;
int i;
struct darwin_info *info = get_darwin_info ();
/* Be sure image infos are loaded. */
darwin_load_image_infos (info);
if (!darwin_dyld_version_ok (info))
return NULL;
image_info_size = ptr_len * 3;
/* Read infos for each solib.
The first entry was rumored to be the executable itself, but this is not
true when a large number of shared libraries are used (table expanded ?).
We now check all entries, but discard executable images. */
for (i = 0; i < info->all_image.count; i++)
{
CORE_ADDR iinfo = info->all_image.info + i * image_info_size;
gdb_byte buf[image_info_size];
CORE_ADDR load_addr;
CORE_ADDR path_addr;
struct mach_o_header_external hdr;
unsigned long hdr_val;
char *file_path;
int errcode;
struct darwin_so_list *dnew;
struct so_list *newobj;
struct cleanup *old_chain;
/* Read image info from inferior. */
if (target_read_memory (iinfo, buf, image_info_size))
break;
load_addr = extract_typed_address (buf, ptr_type);
path_addr = extract_typed_address (buf + ptr_len, ptr_type);
/* Read Mach-O header from memory. */
if (target_read_memory (load_addr, (gdb_byte *) &hdr, sizeof (hdr) - 4))
break;
/* Discard wrong magic numbers. Shouldn't happen. */
hdr_val = extract_unsigned_integer
(hdr.magic, sizeof (hdr.magic), byte_order);
if (hdr_val != BFD_MACH_O_MH_MAGIC && hdr_val != BFD_MACH_O_MH_MAGIC_64)
continue;
/* Discard executable. Should happen only once. */
hdr_val = extract_unsigned_integer
(hdr.filetype, sizeof (hdr.filetype), byte_order);
if (hdr_val == BFD_MACH_O_MH_EXECUTE)
continue;
target_read_string (path_addr, &file_path,
SO_NAME_MAX_PATH_SIZE - 1, &errcode);
if (errcode)
break;
/* Create and fill the new so_list element. */
dnew = XCNEW (struct darwin_so_list);
newobj = &dnew->sl;
old_chain = make_cleanup (xfree, dnew);
newobj->lm_info = &dnew->li;
strncpy (newobj->so_name, file_path, SO_NAME_MAX_PATH_SIZE - 1);
newobj->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0';
strcpy (newobj->so_original_name, newobj->so_name);
xfree (file_path);
newobj->lm_info->lm_addr = load_addr;
if (head == NULL)
head = newobj;
else
tail->next = newobj;
tail = newobj;
discard_cleanups (old_chain);
}
return head;
}