1 /* Target-dependent code for NetBSD/amd64.
3 Copyright (C) 2003, 2004, 2007 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 2 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, write to the Free Software
19 Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, USA. */
23 #include "arch-utils.h"
29 #include "gdb_assert.h"
31 #include "amd64-tdep.h"
32 #include "nbsd-tdep.h"
33 #include "solib-svr4.h"
35 /* Support for signal handlers. */
37 /* Return whether the frame preceding NEXT_FRAME corresponds to a
38 NetBSD sigtramp routine. */
41 amd64nbsd_sigtramp_p (struct frame_info
*next_frame
)
43 CORE_ADDR pc
= frame_pc_unwind (next_frame
);
46 find_pc_partial_function (pc
, &name
, NULL
, NULL
);
47 return nbsd_pc_in_sigtramp (pc
, name
);
50 /* Assuming NEXT_FRAME is preceded by a frame corresponding to a
51 NetBSD sigtramp routine, return the address of the associated
52 mcontext structure. */
55 amd64nbsd_mcontext_addr (struct frame_info
*next_frame
)
59 /* The register %r15 points at `struct ucontext' upon entry of a
61 addr
= frame_unwind_register_unsigned (next_frame
, AMD64_R15_REGNUM
);
63 /* The mcontext structure lives as offset 56 in `struct ucontext'. */
67 /* NetBSD 2.0 or later. */
69 /* Mapping between the general-purpose registers in `struct reg'
70 format and GDB's register cache layout. */
72 /* From <machine/reg.h>. */
73 int amd64nbsd_r_reg_offset
[] =
90 11 * 8, /* ... %r15 */
102 amd64nbsd_init_abi (struct gdbarch_info info
, struct gdbarch
*gdbarch
)
104 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
106 /* Initialize general-purpose register set details first. */
107 tdep
->gregset_reg_offset
= amd64nbsd_r_reg_offset
;
108 tdep
->gregset_num_regs
= ARRAY_SIZE (amd64nbsd_r_reg_offset
);
109 tdep
->sizeof_gregset
= 26 * 8;
111 amd64_init_abi (info
, gdbarch
);
113 tdep
->jb_pc_offset
= 7 * 8;
115 /* NetBSD has its own convention for signal trampolines. */
116 tdep
->sigtramp_p
= amd64nbsd_sigtramp_p
;
117 tdep
->sigcontext_addr
= amd64nbsd_mcontext_addr
;
118 tdep
->sc_reg_offset
= amd64nbsd_r_reg_offset
;
119 tdep
->sc_num_regs
= ARRAY_SIZE (amd64nbsd_r_reg_offset
);
121 /* NetBSD uses SVR4-style shared libraries. */
122 set_solib_svr4_fetch_link_map_offsets
123 (gdbarch
, svr4_lp64_fetch_link_map_offsets
);
127 /* Provide a prototype to silence -Wmissing-prototypes. */
128 void _initialize_amd64nbsd_tdep (void);
131 _initialize_amd64nbsd_ndep (void)
133 /* The NetBSD/amd64 native dependent code makes this assumption. */
134 gdb_assert (ARRAY_SIZE (amd64nbsd_r_reg_offset
) == AMD64_NUM_GREGS
);
136 gdbarch_register_osabi (bfd_arch_i386
, bfd_mach_x86_64
,
137 GDB_OSABI_NETBSD_ELF
, amd64nbsd_init_abi
);