1 /* Target-dependent code for NetBSD/amd64.
3 Copyright 2003 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., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
23 #include "arch-utils.h"
28 #include "gdb_assert.h"
30 #include "nbsd-tdep.h"
31 #include "x86-64-tdep.h"
33 /* Support for signal handlers. */
35 /* Assuming NEXT_FRAME is for a frame following a BSD sigtramp
36 routine, return the address of the associated sigcontext structure. */
39 amd64nbsd_sigcontext_addr (struct frame_info
*next_frame
)
43 /* The stack pointer points at `struct sigcontext' upon entry of a
45 sp
= frame_unwind_register_unsigned (next_frame
, X86_64_RSP_REGNUM
);
49 /* NetBSD 2.0 or later. */
51 /* Mapping between the general-purpose registers in `struct reg'
52 format and GDB's register cache layout. */
54 /* From <machine/reg.h>. */
55 int amd64nbsd_r_reg_offset
[] =
72 11 * 8, /* ... %r15 */
82 amd64nbsd_init_abi (struct gdbarch_info info
, struct gdbarch
*gdbarch
)
84 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
88 /* Initialize general-purpose register set details first. */
89 tdep
->gregset_reg_offset
= amd64nbsd_r_reg_offset
;
90 tdep
->gregset_num_regs
= ARRAY_SIZE (amd64nbsd_r_reg_offset
);
91 tdep
->sizeof_gregset
= 26 * 8;
93 x86_64_init_abi (info
, gdbarch
);
95 tdep
->jb_pc_offset
= 7 * 8;
97 /* NetBSD has its own convention for signal trampolines. */
98 set_gdbarch_pc_in_sigtramp (gdbarch
, nbsd_pc_in_sigtramp
);
100 /* Initialize the array with register offsets in `struct
101 sigcontext'. This `struct sigcontext' has an sc_mcontext member
102 at offset 32, and in <machine/reg.h> we have an explicit comment
103 saying that `struct reg' is the same as mcontext.__gregs. */
104 tdep
->sc_num_regs
= ARRAY_SIZE (amd64nbsd_r_reg_offset
);
105 tdep
->sc_reg_offset
= XCALLOC (tdep
->sc_num_regs
, int);
106 for (i
= 0; i
< tdep
->sc_num_regs
; i
++)
108 if (amd64nbsd_r_reg_offset
[i
] < 0)
109 tdep
->sc_reg_offset
[i
] = -1;
111 tdep
->sc_reg_offset
[i
] = 32 + amd64nbsd_r_reg_offset
[i
];
114 tdep
->sigcontext_addr
= amd64nbsd_sigcontext_addr
;
118 /* Provide a prototype to silence -Wmissing-prototypes. */
119 void _initialize_amd64nbsd_tdep (void);
122 _initialize_amd64nbsd_ndep (void)
124 /* The NetBSD/amd64 native dependent code makes this assumption. */
125 gdb_assert (ARRAY_SIZE (amd64nbsd_r_reg_offset
) == X86_64_NUM_GREGS
);
127 gdbarch_register_osabi (bfd_arch_i386
, bfd_mach_x86_64
,
128 GDB_OSABI_NETBSD_ELF
, amd64nbsd_init_abi
);