1 /* Target-dependent code for DragonFly/amd64.
3 Copyright (C) 2003-2013 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
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/>. */
21 #include "arch-utils.h"
27 #include "gdb_assert.h"
29 #include "amd64-tdep.h"
30 #include "solib-svr4.h"
32 /* Support for signal handlers. */
34 /* Assuming THIS_FRAME is for a BSD sigtramp routine, return the
35 address of the associated sigcontext structure. */
38 amd64dfly_sigcontext_addr (struct frame_info *this_frame)
40 struct gdbarch *gdbarch = get_frame_arch (this_frame);
41 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
45 /* The `struct sigcontext' (which really is an `ucontext_t' on
46 DragonFly/amd64) lives at a fixed offset in the signal frame. See
47 <machine/sigframe.h>. */
48 get_frame_register (this_frame, AMD64_RSP_REGNUM, buf);
49 sp = extract_unsigned_integer (buf, 8, byte_order);
53 /* Mapping between the general-purpose registers in `struct reg'
54 format and GDB's register cache layout.
56 Note that some registers are 32-bit, but since we're little-endian
57 we get away with that. */
59 /* From <machine/reg.h>. */
60 static int amd64dfly_r_reg_offset[] =
77 14 * 8, /* ... %r15 */
88 /* Location of the signal trampoline. */
89 CORE_ADDR amd64dfly_sigtramp_start_addr = 0x7fffffffffc0ULL;
90 CORE_ADDR amd64dfly_sigtramp_end_addr = 0x7fffffffffe0ULL;
92 /* From <machine/signal.h>. */
93 int amd64dfly_sc_reg_offset[] =
95 24 + 6 * 8, /* %rax */
96 24 + 7 * 8, /* %rbx */
97 24 + 3 * 8, /* %rcx */
98 24 + 2 * 8, /* %rdx */
99 24 + 1 * 8, /* %rsi */
100 24 + 0 * 8, /* %rdi */
101 24 + 8 * 8, /* %rbp */
102 24 + 23 * 8, /* %rsp */
103 24 + 4 * 8, /* %r8 ... */
110 24 + 14 * 8, /* ... %r15 */
111 24 + 20 * 8, /* %rip */
112 24 + 22 * 8, /* %eflags */
113 24 + 21 * 8, /* %cs */
114 24 + 24 * 8, /* %ss */
121 /* From /usr/src/lib/libc/amd64/gen/_setjmp.S. */
122 static int amd64dfly_jmp_buf_reg_offset[] =
136 4 * 8, /* %r12 ... */
139 7 * 8, /* ... %r15 */
144 amd64dfly_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
146 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
148 i386bsd_init_abi (info, gdbarch);
150 tdep->gregset_reg_offset = amd64dfly_r_reg_offset;
151 tdep->gregset_num_regs = ARRAY_SIZE (amd64dfly_r_reg_offset);
152 tdep->sizeof_gregset = 25 * 8;
154 amd64_init_abi (info, gdbarch);
156 tdep->sigtramp_start = amd64dfly_sigtramp_start_addr;
157 tdep->sigtramp_end = amd64dfly_sigtramp_end_addr;
158 tdep->sigcontext_addr = amd64dfly_sigcontext_addr;
159 tdep->sc_reg_offset = amd64dfly_sc_reg_offset;
160 tdep->sc_num_regs = ARRAY_SIZE (amd64dfly_sc_reg_offset);
162 set_solib_svr4_fetch_link_map_offsets
163 (gdbarch, svr4_lp64_fetch_link_map_offsets);
167 /* Provide a prototype to silence -Wmissing-prototypes. */
168 void _initialize_amd64dfly_tdep (void);
171 _initialize_amd64dfly_tdep (void)
173 gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
174 GDB_OSABI_DRAGONFLY, amd64dfly_init_abi);