1 /* Target-dependent code for NetBSD/amd64.
3 Copyright (C) 2003, 2004, 2007, 2008, 2009, 2010
4 Free Software Foundation, 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/>. */
22 #include "arch-utils.h"
28 #include "gdb_assert.h"
30 #include "amd64-tdep.h"
31 #include "nbsd-tdep.h"
32 #include "solib-svr4.h"
34 /* Support for signal handlers. */
36 /* Return whether THIS_FRAME corresponds to a NetBSD sigtramp
40 amd64nbsd_sigtramp_p (struct frame_info *this_frame)
42 CORE_ADDR pc = get_frame_pc (this_frame);
45 find_pc_partial_function (pc, &name, NULL, NULL);
46 return nbsd_pc_in_sigtramp (pc, name);
49 /* Assuming THIS_FRAME corresponds to a NetBSD sigtramp routine,
50 return the address of the associated mcontext structure. */
53 amd64nbsd_mcontext_addr (struct frame_info *this_frame)
57 /* The register %r15 points at `struct ucontext' upon entry of a
59 addr = get_frame_register_unsigned (this_frame, AMD64_R15_REGNUM);
61 /* The mcontext structure lives as offset 56 in `struct ucontext'. */
65 /* NetBSD 2.0 or later. */
67 /* Mapping between the general-purpose registers in `struct reg'
68 format and GDB's register cache layout. */
70 /* From <machine/reg.h>. */
71 int amd64nbsd_r_reg_offset[] =
88 11 * 8, /* ... %r15 */
100 amd64nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
102 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
104 /* Initialize general-purpose register set details first. */
105 tdep->gregset_reg_offset = amd64nbsd_r_reg_offset;
106 tdep->gregset_num_regs = ARRAY_SIZE (amd64nbsd_r_reg_offset);
107 tdep->sizeof_gregset = 26 * 8;
109 amd64_init_abi (info, gdbarch);
111 tdep->jb_pc_offset = 7 * 8;
113 /* NetBSD has its own convention for signal trampolines. */
114 tdep->sigtramp_p = amd64nbsd_sigtramp_p;
115 tdep->sigcontext_addr = amd64nbsd_mcontext_addr;
116 tdep->sc_reg_offset = amd64nbsd_r_reg_offset;
117 tdep->sc_num_regs = ARRAY_SIZE (amd64nbsd_r_reg_offset);
119 /* NetBSD uses SVR4-style shared libraries. */
120 set_solib_svr4_fetch_link_map_offsets
121 (gdbarch, svr4_lp64_fetch_link_map_offsets);
125 /* Provide a prototype to silence -Wmissing-prototypes. */
126 void _initialize_amd64nbsd_tdep (void);
129 _initialize_amd64nbsd_tdep (void)
131 /* The NetBSD/amd64 native dependent code makes this assumption. */
132 gdb_assert (ARRAY_SIZE (amd64nbsd_r_reg_offset) == AMD64_NUM_GREGS);
134 gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
135 GDB_OSABI_NETBSD_ELF, amd64nbsd_init_abi);