GDB (xrefs)
Loading...
Searching...
No Matches
amd64-netbsd-tdep.c
Go to the documentation of this file.
1/* Target-dependent code for NetBSD/amd64.
2
3 Copyright (C) 2003-2023 Free Software Foundation, Inc.
4
5 This file is part of GDB.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19
20#include "defs.h"
21#include "arch-utils.h"
22#include "frame.h"
23#include "gdbcore.h"
24#include "osabi.h"
25#include "symtab.h"
26
27#include "amd64-tdep.h"
28#include "gdbsupport/x86-xstate.h"
29#include "netbsd-tdep.h"
30#include "solib-svr4.h"
31
32/* Support for signal handlers. */
33
34/* Return whether THIS_FRAME corresponds to a NetBSD sigtramp
35 routine. */
36
37static int
39{
40 CORE_ADDR pc = get_frame_pc (this_frame);
41 const char *name;
42
43 find_pc_partial_function (pc, &name, NULL, NULL);
44 return nbsd_pc_in_sigtramp (pc, name);
45}
46
47/* Assuming THIS_FRAME corresponds to a NetBSD sigtramp routine,
48 return the address of the associated mcontext structure. */
49
50static CORE_ADDR
52{
53 CORE_ADDR addr;
54
55 /* The register %r15 points at `struct ucontext' upon entry of a
56 signal trampoline. */
58
59 /* The mcontext structure lives as offset 56 in `struct ucontext'. */
60 return addr + 56;
61}
62
63/* NetBSD 2.0 or later. */
64
65/* Mapping between the general-purpose registers in `struct reg'
66 format and GDB's register cache layout. */
67
68/* From <machine/reg.h>. */
70{
71 14 * 8, /* %rax */
72 13 * 8, /* %rbx */
73 3 * 8, /* %rcx */
74 2 * 8, /* %rdx */
75 1 * 8, /* %rsi */
76 0 * 8, /* %rdi */
77 12 * 8, /* %rbp */
78 24 * 8, /* %rsp */
79 4 * 8, /* %r8 .. */
80 5 * 8,
81 6 * 8,
82 7 * 8,
83 8 * 8,
84 9 * 8,
85 10 * 8,
86 11 * 8, /* ... %r15 */
87 21 * 8, /* %rip */
88 23 * 8, /* %eflags */
89 22 * 8, /* %cs */
90 25 * 8, /* %ss */
91 18 * 8, /* %ds */
92 17 * 8, /* %es */
93 16 * 8, /* %fs */
94 15 * 8 /* %gs */
95};
96
97static void
99{
100 i386_gdbarch_tdep *tdep = gdbarch_tdep<i386_gdbarch_tdep> (gdbarch);
101
102 /* Initialize general-purpose register set details first. */
104 tdep->gregset_num_regs = ARRAY_SIZE (amd64nbsd_r_reg_offset);
105 tdep->sizeof_gregset = 26 * 8;
106
107 amd64_init_abi (info, gdbarch,
108 amd64_target_description (X86_XSTATE_SSE_MASK, true));
109 nbsd_init_abi (info, gdbarch);
110
111 tdep->jb_pc_offset = 7 * 8;
112
113 /* NetBSD has its own convention for signal trampolines. */
117 tdep->sc_num_regs = ARRAY_SIZE (amd64nbsd_r_reg_offset);
118
119 /* NetBSD uses SVR4-style shared libraries. */
122}
123
125void
127{
128 /* The NetBSD/amd64 native dependent code makes this assumption. */
129 gdb_assert (ARRAY_SIZE (amd64nbsd_r_reg_offset) == AMD64_NUM_GREGS);
130
131 gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
133}
const char *const name
int amd64nbsd_r_reg_offset[]
static CORE_ADDR amd64nbsd_mcontext_addr(frame_info_ptr this_frame)
static void amd64nbsd_init_abi(struct gdbarch_info info, struct gdbarch *gdbarch)
void _initialize_amd64nbsd_tdep()
static int amd64nbsd_sigtramp_p(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)
#define AMD64_NUM_GREGS
Definition amd64-tdep.h:87
@ AMD64_R15_REGNUM
Definition amd64-tdep.h:50
bool find_pc_partial_function(CORE_ADDR pc, const char **name, CORE_ADDR *address, CORE_ADDR *endaddr, const struct block **block)
Definition blockframe.c:373
ULONGEST get_frame_register_unsigned(frame_info_ptr frame, int regnum)
Definition frame.c:1399
CORE_ADDR get_frame_pc(frame_info_ptr frame)
Definition frame.c:2712
int nbsd_pc_in_sigtramp(CORE_ADDR pc, const char *func_name)
Definition netbsd-tdep.c:48
void nbsd_init_abi(struct gdbarch_info info, struct gdbarch *gdbarch)
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_NETBSD
Definition osabi.h:34
void set_solib_svr4_fetch_link_map_offsets(struct gdbarch *gdbarch, struct link_map_offsets *(*flmo)(void))
struct link_map_offsets * svr4_lp64_fetch_link_map_offsets(void)
int * gregset_reg_offset
Definition i386-tdep.h:64
int(* sigtramp_p)(frame_info_ptr)
Definition i386-tdep.h:230
CORE_ADDR(* sigcontext_addr)(frame_info_ptr)
Definition i386-tdep.h:233
size_t sizeof_gregset
Definition i386-tdep.h:66