/* Handle Darwin shared libraries for GDB, the GNU Debugger.
- Copyright (C) 2009-2012 Free Software Foundation, Inc.
+ Copyright (C) 2009-2014 Free Software Foundation, Inc.
This file is part of GDB.
/* Current all_image_infos version. */
#define DYLD_VERSION_MIN 1
-#define DYLD_VERSION_MAX 12
+#define DYLD_VERSION_MAX 14
/* Per PSPACE specific data. */
struct darwin_info
static void
darwin_pspace_data_cleanup (struct program_space *pspace, void *arg)
{
- struct darwin_info *info;
-
- info = program_space_data (pspace, solib_darwin_pspace_data);
- xfree (info);
+ xfree (arg);
}
/* Get the current darwin data. If none is found yet, add it now. This
if (info != NULL)
return info;
- info = XZALLOC (struct darwin_info);
+ info = XCNEW (struct darwin_info);
set_program_space_data (current_program_space,
solib_darwin_pspace_data, info);
return info;
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. */
/* Return program interpreter string. */
-static gdb_byte *
+static char *
find_program_interpreter (void)
{
- gdb_byte *buf = NULL;
+ char *buf = NULL;
/* If we have an exec_bfd, get the interpreter from the load commands. */
if (exec_bfd)
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;
path_addr = extract_typed_address (buf + ptr_len, ptr_type);
/* Read Mach-O header from memory. */
- if (target_read_memory (load_addr, (char *) &hdr, sizeof (hdr) - 4))
+ 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
break;
/* Create and fill the new so_list element. */
- dnew = XZALLOC (struct darwin_so_list);
+ dnew = XCNEW (struct darwin_so_list);
new = &dnew->sl;
old_chain = make_cleanup (xfree, dnew);
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, (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;
+ /* 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. */
static void
darwin_solib_get_all_image_info_addr_at_init (struct darwin_info *info)
{
- gdb_byte *interp_name;
+ char *interp_name;
CORE_ADDR load_addr = 0;
bfd *dyld_bfd = NULL;
+ struct cleanup *cleanup;
/* This method doesn't work with an attached process. */
if (current_inferior ()->attach_flag)
if (!interp_name)
return;
+ cleanup = make_cleanup (null_cleanup, NULL);
+
/* Create a bfd for the interpreter. */
- dyld_bfd = gdb_bfd_ref (bfd_openr (interp_name, gnutarget));
+ dyld_bfd = gdb_bfd_open (interp_name, gnutarget, -1);
if (dyld_bfd)
{
bfd *sub;
- sub = bfd_mach_o_fat_extract (dyld_bfd, bfd_object,
- gdbarch_bfd_arch_info (target_gdbarch));
+ make_cleanup_bfd_unref (dyld_bfd);
+ sub = gdb_bfd_mach_o_fat_extract (dyld_bfd, bfd_object,
+ gdbarch_bfd_arch_info (target_gdbarch ()));
if (sub)
- dyld_bfd = sub;
- else
{
- gdb_bfd_unref (dyld_bfd);
- dyld_bfd = NULL;
+ dyld_bfd = sub;
+ make_cleanup_bfd_unref (sub);
}
+ else
+ dyld_bfd = NULL;
}
if (!dyld_bfd)
- return;
+ {
+ do_cleanups (cleanup);
+ return;
+ }
/* We find the dynamic linker's base address by examining
the current pc (which should point at the entry point for the
info->all_image_addr =
lookup_symbol_from_bfd (dyld_bfd, "_dyld_all_image_infos");
- gdb_bfd_unref (dyld_bfd);
+ do_cleanups (cleanup);
if (info->all_image_addr == 0)
return;
{
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))
+ {
+ 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 = 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_close (abfd);
+ 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;
}
_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