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amd64-darwin-tdep.c
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1/* Darwin support for GDB, the GNU debugger.
2 Copyright (C) 1997-2023 Free Software Foundation, Inc.
3
4 Contributed by Apple Computer, Inc.
5
6 This file is part of GDB.
7
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.
12
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.
17
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/>. */
20
21#include "defs.h"
22#include "frame.h"
23#include "inferior.h"
24#include "gdbcore.h"
25#include "target.h"
26#include "symtab.h"
27#include "regcache.h"
28#include "objfiles.h"
29
30#include "i387-tdep.h"
31#include "gdbsupport/x86-xstate.h"
32#include "amd64-tdep.h"
33#include "osabi.h"
34#include "ui-out.h"
35#include "amd64-darwin-tdep.h"
36#include "i386-darwin-tdep.h"
37#include "solib.h"
38#include "solib-darwin.h"
39#include "dwarf2/frame.h"
40
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. */
44{
45 0 * 8, /* %rax */
46 1 * 8, /* %rbx */
47 2 * 8, /* %rcx */
48 3 * 8, /* %rdx */
49 5 * 8, /* %rsi */
50 4 * 8, /* %rdi */
51 6 * 8, /* %rbp */
52 7 * 8, /* %rsp */
53 8 * 8, /* %r8 ... */
54 9 * 8,
55 10 * 8,
56 11 * 8,
57 12 * 8,
58 13 * 8,
59 14 * 8,
60 15 * 8, /* ... %r15 */
61 16 * 8, /* %rip */
62 17 * 8, /* %rflags */
63 18 * 8, /* %cs */
64 -1, /* %ss */
65 -1, /* %ds */
66 -1, /* %es */
67 19 * 8, /* %fs */
68 20 * 8 /* %gs */
69};
70
73
74/* Assuming THIS_FRAME is a Darwin sigtramp routine, return the
75 address of the associated sigcontext structure. */
76
77static CORE_ADDR
79{
80 struct gdbarch *gdbarch = get_frame_arch (this_frame);
81 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
82 CORE_ADDR rbx;
83 gdb_byte buf[8];
84
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);
89
90 /* The pointer to mcontext is at offset 48. */
91 read_memory (rbx + 48, buf, 8);
92
93 /* First register (rax) is at offset 16. */
94 return extract_unsigned_integer (buf, 8, byte_order) + 16;
95}
96
97static void
118
120void
static void x86_darwin_init_abi_64(struct gdbarch_info info, struct gdbarch *gdbarch)
void _initialize_amd64_darwin_tdep()
int amd64_darwin_thread_state_reg_offset[]
const int amd64_darwin_thread_state_num_regs
static CORE_ADDR amd64_darwin_sigcontext_addr(frame_info_ptr this_frame)
const struct target_desc * amd64_target_description(uint64_t xcr0, bool segments)
void amd64_init_abi(struct gdbarch_info info, struct gdbarch *gdbarch, const target_desc *default_tdesc)
@ AMD64_RBX_REGNUM
Definition amd64-tdep.h:36
@ reg_struct_return
Definition arm-tdep.h:86
void read_memory(CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
Definition corefile.c:238
static ULONGEST extract_unsigned_integer(gdb::array_view< const gdb_byte > buf, enum bfd_endian byte_order)
Definition defs.h:480
void dwarf2_frame_set_signal_frame_p(struct gdbarch *gdbarch, int(*signal_frame_p)(struct gdbarch *, frame_info_ptr))
Definition frame.c:692
void get_frame_register(frame_info_ptr frame, int regnum, gdb_byte *buf)
Definition frame.c:1263
struct gdbarch * get_frame_arch(frame_info_ptr this_frame)
Definition frame.c:3027
enum bfd_endian gdbarch_byte_order(struct gdbarch *gdbarch)
Definition gdbarch.c:1396
void set_gdbarch_so_ops(struct gdbarch *gdbarch, const struct target_so_ops *so_ops)
Definition gdbarch.c:3380
int darwin_dwarf_signal_frame_p(struct gdbarch *gdbarch, frame_info_ptr this_frame)
int i386_sigtramp_p(frame_info_ptr this_frame)
Definition i386-tdep.c:4104
info(Component c)
Definition gdbarch.py:41
void gdbarch_register_osabi(enum bfd_architecture arch, unsigned long machine, enum gdb_osabi osabi, void(*init_osabi)(struct gdbarch_info, struct gdbarch *))
Definition osabi.c:146
@ GDB_OSABI_DARWIN
Definition osabi.h:43
const struct target_so_ops darwin_so_ops
int(* sigtramp_p)(frame_info_ptr)
Definition i386-tdep.h:230
CORE_ADDR(* sigcontext_addr)(frame_info_ptr)
Definition i386-tdep.h:233