1 /* Darwin support for GDB, the GNU debugger.
2 Copyright (C) 1997-2017 Free Software Foundation, Inc.
4 Contributed by Apple Computer, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
26 #include "floatformat.h"
31 #include "i387-tdep.h"
32 #include "amd64-tdep.h"
35 #include "amd64-darwin-tdep.h"
36 #include "i386-darwin-tdep.h"
38 #include "solib-darwin.h"
39 #include "dwarf2-frame.h"
41 /* Offsets into the struct x86_thread_state64 where we'll find the saved regs.
42 From <mach/i386/thread_status.h> and amd64-tdep.h. */
43 int amd64_darwin_thread_state_reg_offset[] =
60 15 * 8, /* ... %r15 */
71 const int amd64_darwin_thread_state_num_regs =
72 ARRAY_SIZE (amd64_darwin_thread_state_reg_offset);
74 /* Assuming THIS_FRAME is a Darwin sigtramp routine, return the
75 address of the associated sigcontext structure. */
78 amd64_darwin_sigcontext_addr (struct frame_info *this_frame)
80 struct gdbarch *gdbarch = get_frame_arch (this_frame);
81 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
85 /* A pointer to the ucontext is passed as the fourth argument
86 to the signal handler, which is saved in rbx. */
87 get_frame_register (this_frame, AMD64_RBX_REGNUM, buf);
88 rbx = extract_unsigned_integer (buf, 8, byte_order);
90 /* The pointer to mcontext is at offset 48. */
91 read_memory (rbx + 48, buf, 8);
93 /* First register (rax) is at offset 16. */
94 return extract_unsigned_integer (buf, 8, byte_order) + 16;
98 x86_darwin_init_abi_64 (struct gdbarch_info info, struct gdbarch *gdbarch)
100 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
102 amd64_init_abi (info, gdbarch);
104 tdep->struct_return = reg_struct_return;
106 dwarf2_frame_set_signal_frame_p (gdbarch, darwin_dwarf_signal_frame_p);
108 tdep->sigtramp_p = i386_sigtramp_p;
109 tdep->sigcontext_addr = amd64_darwin_sigcontext_addr;
110 tdep->sc_reg_offset = amd64_darwin_thread_state_reg_offset;
111 tdep->sc_num_regs = amd64_darwin_thread_state_num_regs;
113 tdep->jb_pc_offset = 56;
115 set_solib_ops (gdbarch, &darwin_so_ops);
118 /* -Wmissing-prototypes */
119 extern initialize_file_ftype _initialize_amd64_darwin_tdep;
122 _initialize_amd64_darwin_tdep (void)
124 gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
125 GDB_OSABI_DARWIN, x86_darwin_init_abi_64);