/* Handle Darwin shared libraries for GDB, the GNU Debugger.
- Copyright (C) 2009, 2010 Free Software Foundation, Inc.
+ Copyright (C) 2009-2012 Free Software Foundation, Inc.
This file is part of GDB.
#include "auxv.h"
#include "exceptions.h"
#include "mach-o.h"
+#include "mach-o/external.h"
struct gdb_dyld_image_info
{
/* Current all_image_infos version. */
#define DYLD_VERSION_MIN 1
-#define DYLD_VERSION_MAX 7
+#define DYLD_VERSION_MAX 12
/* Address of structure dyld_all_image_infos in inferior. */
static CORE_ADDR dyld_all_image_addr;
return 0;
}
-/* Build a list of currently loaded shared objects. See solib-svr4.c */
+/* Build a list of currently loaded shared objects. See solib-svr4.c. */
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;
CORE_ADDR lm;
image_info_size = ptr_len * 3;
/* Read infos for each solib.
- This first entry is ignored as this is the executable itself. */
- for (i = 1; i < dyld_all_image.count; i++)
+ 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 < dyld_all_image.count; i++)
{
CORE_ADDR info = dyld_all_image.info + i * image_info_size;
char 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;
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, (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;
+ /* 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)
/* Return 1 if PC lies in the dynamic symbol resolution code of the
run time loader. */
-int
+static int
darwin_in_dynsym_resolve_code (CORE_ADDR pc)
{
return 0;
{
}
-/* Shared library startup support. See documentation in solib-svr4.c */
+/* 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_create_inferior_hook (int from_tty)
+darwin_solib_get_all_image_info_addr_at_init (void)
{
- struct minimal_symbol *msymbol;
- char **bkpt_namep;
- asection *interp_sect;
gdb_byte *interp_name;
- CORE_ADDR sym_addr;
CORE_ADDR load_addr = 0;
- int load_addr_found = 0;
- int loader_found_in_list = 0;
- struct so_list *so;
bfd *dyld_bfd = NULL;
- struct inferior *inf = current_inferior ();
+
+ /* This method doesn't work with an attached process. */
+ if (current_inferior ()->attach_flag)
+ return;
/* Find the program interpreter. */
interp_name = find_program_interpreter ();
return;
/* Create a bfd for the interpreter. */
- sym_addr = 0;
dyld_bfd = bfd_openr (interp_name, gnutarget);
if (dyld_bfd)
{
if (!dyld_bfd)
return;
- if (!inf->attach_flag)
- {
- /* We find the dynamic linker's base address by examining
- the current pc (which should point at the entry point for the
- dynamic linker) and subtracting the offset of the entry point. */
- load_addr = (regcache_read_pc (get_current_regcache ())
- - bfd_get_start_address (dyld_bfd));
- }
- else
- {
- /* FIXME: todo.
- Get address of __DATA.__dyld in exec_bfd, read address at offset 0.
- */
- return;
- }
+ /* We find the dynamic linker's base address by examining
+ the current pc (which should point at the entry point for the
+ dynamic linker) and subtracting the offset of the entry point. */
+ load_addr = (regcache_read_pc (get_current_regcache ())
+ - bfd_get_start_address (dyld_bfd));
/* Now try to set a breakpoint in the dynamic linker. */
dyld_all_image_addr =
return;
dyld_all_image_addr += load_addr;
+}
+
+/* Extract dyld_all_image_addr reading it from
+ TARGET_OBJECT_DARWIN_DYLD_INFO. */
+
+static void
+darwin_solib_read_all_image_info_addr (void)
+{
+ gdb_byte buf[8 + 8 + 4];
+ LONGEST len;
+ 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));
+ if (len != sizeof (buf))
+ return;
+
+ dyld_all_image_addr = extract_unsigned_integer (buf, 8, byte_order);
+}
+
+/* Shared library startup support. See documentation in solib-svr4.c. */
+
+static void
+darwin_solib_create_inferior_hook (int from_tty)
+{
+ dyld_all_image_addr = 0;
+
+ darwin_solib_read_all_image_info_addr ();
+
+ if (dyld_all_image_addr == 0)
+ darwin_solib_get_all_image_info_addr_at_init ();
+
+ if (dyld_all_image_addr == 0)
+ return;
darwin_load_image_infos ();
error (_("`%s': not a shared-library: %s"),
found_pathname, bfd_errmsg (bfd_get_error ()));
}
+
+ /* Make sure that the filename is malloc'ed. The current filename
+ for fat-binaries BFDs is a name that was generated by BFD, usually
+ a static string containing the name of the architecture. */
+ res->filename = xstrdup (pathname);
+
return res;
}
struct target_so_ops darwin_so_ops;
+/* -Wmissing-prototypes */
+extern initialize_file_ftype _initialize_darwin_solib;
+
void
_initialize_darwin_solib (void)
{
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