1 /* Target-dependent code for NetBSD/amd64.
3 Copyright (C) 2003-2019 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/>. */
22 /* Local non-gdb includes. */
23 #include "amd64-tdep.h"
24 #include "arch-utils.h"
25 #include "common/x86-xstate.h"
28 #include "nbsd-tdep.h"
30 #include "solib-svr4.h"
33 /* Support for signal handlers. */
35 /* Return whether THIS_FRAME corresponds to a NetBSD sigtramp
39 amd64nbsd_sigtramp_p (struct frame_info *this_frame)
41 CORE_ADDR pc = get_frame_pc (this_frame);
44 find_pc_partial_function (pc, &name, NULL, NULL);
45 return nbsd_pc_in_sigtramp (pc, name);
48 /* Assuming THIS_FRAME corresponds to a NetBSD sigtramp routine,
49 return the address of the associated mcontext structure. */
52 amd64nbsd_mcontext_addr (struct frame_info *this_frame)
56 /* The register %r15 points at `struct ucontext' upon entry of a
58 addr = get_frame_register_unsigned (this_frame, AMD64_R15_REGNUM);
60 /* The mcontext structure lives as offset 56 in `struct ucontext'. */
64 /* NetBSD 2.0 or later. */
66 /* Mapping between the general-purpose registers in `struct reg'
67 format and GDB's register cache layout. */
69 /* From <machine/reg.h>. */
70 int amd64nbsd_r_reg_offset[] =
87 11 * 8, /* ... %r15 */
99 amd64nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
101 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
103 /* Initialize general-purpose register set details first. */
104 tdep->gregset_reg_offset = amd64nbsd_r_reg_offset;
105 tdep->gregset_num_regs = ARRAY_SIZE (amd64nbsd_r_reg_offset);
106 tdep->sizeof_gregset = 26 * 8;
108 amd64_init_abi (info, gdbarch,
109 amd64_target_description (X86_XSTATE_SSE_MASK, true));
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 _initialize_amd64nbsd_tdep (void)
127 /* The NetBSD/amd64 native dependent code makes this assumption. */
128 gdb_assert (ARRAY_SIZE (amd64nbsd_r_reg_offset) == AMD64_NUM_GREGS);
130 gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
131 GDB_OSABI_NETBSD, amd64nbsd_init_abi);