/* Handle Darwin shared libraries for GDB, the GNU Debugger.
- Copyright (C) 2009-2012 Free Software Foundation, Inc.
+ Copyright (C) 2009-2013 Free Software Foundation, Inc.
This file is part of GDB.
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;
+ 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. */
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);
+ 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;
for (i = 0; i < info->all_image.count; i++)
{
CORE_ADDR iinfo = info->all_image.info + i * image_info_size;
- char buf[image_info_size];
+ gdb_byte buf[image_info_size];
CORE_ADDR load_addr;
CORE_ADDR path_addr;
struct mach_o_header_external hdr;
return head;
}
+/* Get the load address of the executable. We assume that the dyld info are
+ correct. */
+
+static CORE_ADDR
+darwin_read_exec_load_addr (struct darwin_info *info)
+{
+ 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 = ptr_len * 3;
+ int i;
+
+ /* Read infos for each solib. One of them should be the executable. */
+ 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;
+ struct mach_o_header_external hdr;
+ unsigned long hdr_val;
+
+ /* Read image info from inferior. */
+ if (target_read_memory (iinfo, buf, image_info_size))
+ break;
+
+ load_addr = extract_typed_address (buf, ptr_type);
+
+ /* Read Mach-O header from memory. */
+ if (target_read_memory (load_addr, (char *) &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;
+ /* Check executable. */
+ hdr_val = extract_unsigned_integer
+ (hdr.filetype, sizeof (hdr.filetype), byte_order);
+ if (hdr_val == BFD_MACH_O_MH_EXECUTE)
+ return load_addr;
+ }
+
+ return 0;
+}
+
/* Return 1 if PC lies in the dynamic symbol resolution code of the
run time loader. */
{
}
+/* A wrapper for bfd_mach_o_fat_extract that handles reference
+ counting properly. This will either return NULL, or return a new
+ reference to a BFD. */
+
+static bfd *
+gdb_bfd_mach_o_fat_extract (bfd *abfd, bfd_format format,
+ const bfd_arch_info_type *arch)
+{
+ bfd *result = bfd_mach_o_fat_extract (abfd, format, arch);
+
+ if (result == NULL)
+ return NULL;
+
+ if (result == abfd)
+ gdb_bfd_ref (result);
+ else
+ gdb_bfd_mark_parent (result, abfd);
+
+ return result;
+}
+
/* Extract dyld_all_image_addr when the process was just created, assuming the
current PC is at the entry of the dynamic linker. */
cleanup = make_cleanup (null_cleanup, NULL);
/* Create a bfd for the interpreter. */
- dyld_bfd = gdb_bfd_openr (interp_name, gnutarget);
+ dyld_bfd = gdb_bfd_open (interp_name, gnutarget, -1);
if (dyld_bfd)
{
bfd *sub;
make_cleanup_bfd_unref (dyld_bfd);
- sub = bfd_mach_o_fat_extract (dyld_bfd, bfd_object,
- gdbarch_bfd_arch_info (target_gdbarch));
+ sub = gdb_bfd_mach_o_fat_extract (dyld_bfd, bfd_object,
+ gdbarch_bfd_arch_info (target_gdbarch ()));
if (sub)
{
dyld_bfd = sub;
- gdb_bfd_ref (sub);
make_cleanup_bfd_unref (sub);
}
else
{
gdb_byte buf[8 + 8 + 4];
LONGEST len;
- enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch);
+ enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
len = target_read (¤t_target, TARGET_OBJECT_DARWIN_DYLD_INFO, NULL,
buf, 0, sizeof (buf));
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_load_image_infos (info);
- if (darwin_dyld_version_ok (info))
- create_solib_event_breakpoint (target_gdbarch, info->all_image.notifier);
+ if (!darwin_dyld_version_ok (info))
+ 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 = 0;
+ struct mach_o_data_struct *md = bfd_mach_o_get_data (exec_bfd);
+ unsigned int i, num;
+
+ /* Find the base address of the executable. */
+ for (i = 0; i < md->header.ncmds; i++)
+ {
+ struct bfd_mach_o_load_command *cmd = &md->commands[i];
+
+ if (cmd->type != BFD_MACH_O_LC_SEGMENT
+ && cmd->type != BFD_MACH_O_LC_SEGMENT_64)
+ continue;
+ if (cmd->command.segment.fileoff == 0
+ && cmd->command.segment.vmaddr != 0
+ && cmd->command.segment.filesize != 0)
+ {
+ vmaddr = cmd->command.segment.vmaddr;
+ break;
+ }
+ }
+
+ /* Relocate. */
+ if (vmaddr != load_addr)
+ objfile_rebase (symfile_objfile, load_addr - vmaddr);
+ }
}
static void
/* Open bfd for shared library. */
abfd = solib_bfd_fopen (found_pathname, found_file);
- res = bfd_mach_o_fat_extract (abfd, bfd_object,
- gdbarch_bfd_arch_info (target_gdbarch));
+ 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 ()));
}
+
+ gdb_bfd_unref (abfd);
return res;
}
_initialize_darwin_solib (void)
{
solib_darwin_pspace_data
- = register_program_space_data_with_cleanup (darwin_pspace_data_cleanup);
+ = register_program_space_data_with_cleanup (NULL,
+ darwin_pspace_data_cleanup);
darwin_so_ops.relocate_section_addresses = darwin_relocate_section_addresses;
darwin_so_ops.free_so = darwin_free_so;
projects / deliverable / binutils-gdb.git / blobdiff