2009-06-29 Tristan Gingold <gingold@adacore.com>

* i386-darwin-tdep.c (amd64_darwin_thread_state_reg_offset)
	(amd64_darwin_thread_state_num_regs)
	(amd64_darwin_sigcontext_addr, x86_darwin_init_abi_64): Moved to
	amd64-darwin-tdep.c
	(_initialize_i386_darwin_tdep): Remove 64 bits parts.
	(darwin_dwarf_signal_frame_p): Make public.
	* amd64-darwin-tdep.c: New file with most chunks from
	i386-darwin-tdep.c
	* i386-darwin-tdep.h: Add a prototype for darwin_dwarf_signal_frame_p.
	(amd64_darwin_thread_state_reg_offset)
	(amd64_darwin_thread_state_num_regs): Moved to amd64-darwin-tdep.h
	* amd64-darwin-tdep.h: New file.
	* i386-darwin-nat.c: Only includes amd64-nat.h and amd64-darwin-tdep.h
	if BFD64 is defined.
	(i386_darwin_fetch_inferior_registers): Add #ifdef BFD64/#endif around
	64 bits parts.
	(i386_darwin_store_inferior_registers): Ditto.
	(darwin_set_sstep): Ditto.
	(darwin_complete_target): Ditto.
	(amd64_darwin_sstep_at_sigreturn): Ditto.
	* configure.tgt: Create a separate entry for x86_64-*-darwin.
	Add 64 bits support for i386-*-darwin if --enable-64-bit-bfd.
	* Makefile.in (ALLDEPFILES): Add amd64-darwin-tdep.c, darwin-nat.c,
	i386-darwin-tdep.c i386-darwin-nat.c
	(ALL_64_TARGET_OBS): Add amd64-darwin-tdep.o

gdb/amd64-darwin-tdep.c

@@ -0,0 +1,129 @@
+/* Darwin support for GDB, the GNU debugger.
+   Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2005, 2008, 2009
+   Free Software Foundation, Inc.
+
+   Contributed by Apple Computer, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "defs.h"
+#include "frame.h"
+#include "inferior.h"
+#include "gdbcore.h"
+#include "target.h"
+#include "floatformat.h"
+#include "symtab.h"
+#include "regcache.h"
+#include "libbfd.h"
+#include "objfiles.h"
+
+#include "i387-tdep.h"
+#include "amd64-tdep.h"
+#include "osabi.h"
+#include "ui-out.h"
+#include "symtab.h"
+#include "frame.h"
+#include "gdb_assert.h"
+#include "amd64-darwin-tdep.h"
+#include "i386-darwin-tdep.h"
+#include "solib.h"
+#include "solib-darwin.h"
+#include "dwarf2-frame.h"
+
+/* Offsets into the struct x86_thread_state64 where we'll find the saved regs.
+   From <mach/i386/thread_status.h> and amd64-tdep.h.  */
+int amd64_darwin_thread_state_reg_offset[] =
+{
+  0 * 8,			/* %rax */
+  1 * 8,			/* %rbx */
+  2 * 8,			/* %rcx */
+  3 * 8,			/* %rdx */
+  5 * 8,			/* %rsi */
+  4 * 8,			/* %rdi */
+  6 * 8,			/* %rbp */
+  7 * 8,			/* %rsp */
+  8 * 8,			/* %r8 ... */
+  9 * 8,
+  10 * 8,
+  11 * 8,
+  12 * 8,
+  13 * 8,
+  14 * 8,
+  15 * 8,			/* ... %r15 */
+  16 * 8,			/* %rip */
+  17 * 8,			/* %rflags */
+  18 * 8,			/* %cs */
+  -1,				/* %ss */
+  -1,				/* %ds */
+  -1,				/* %es */
+  19 * 8,			/* %fs */
+  20 * 8			/* %gs */
+};
+
+const int amd64_darwin_thread_state_num_regs = 
+  ARRAY_SIZE (amd64_darwin_thread_state_reg_offset);
+
+/* Assuming THIS_FRAME is a Darwin sigtramp routine, return the
+   address of the associated sigcontext structure.  */
+
+static CORE_ADDR
+amd64_darwin_sigcontext_addr (struct frame_info *this_frame)
+{
+  struct gdbarch *gdbarch = get_frame_arch (this_frame);
+  enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+  CORE_ADDR rbx;
+  CORE_ADDR si;
+  gdb_byte buf[8];
+
+  /* A pointer to the ucontext is passed as the fourth argument
+     to the signal handler, which is saved in rbx.  */
+  get_frame_register (this_frame, AMD64_RBX_REGNUM, buf);
+  rbx = extract_unsigned_integer (buf, 8, byte_order);
+
+  /* The pointer to mcontext is at offset 48.  */
+  read_memory (rbx + 48, buf, 8);
+
+  /* First register (rax) is at offset 16.  */
+  return extract_unsigned_integer (buf, 8, byte_order) + 16;
+}
+
+static void
+x86_darwin_init_abi_64 (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+  amd64_init_abi (info, gdbarch);
+
+  tdep->struct_return = reg_struct_return;
+
+  dwarf2_frame_set_signal_frame_p (gdbarch, darwin_dwarf_signal_frame_p);
+
+  tdep->sigtramp_p = i386_sigtramp_p;
+  tdep->sigcontext_addr = amd64_darwin_sigcontext_addr;
+  tdep->sc_reg_offset = amd64_darwin_thread_state_reg_offset;
+  tdep->sc_num_regs = amd64_darwin_thread_state_num_regs;
+
+  tdep->jb_pc_offset = 148;
+
+  set_solib_ops (gdbarch, &darwin_so_ops);
+}
+
+void
+_initialize_amd64_darwin_tdep (void)
+{
+  gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
+                          GDB_OSABI_DARWIN, x86_darwin_init_abi_64);
+}