1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
/* Target-dependent code for OpenBSD/arm.
Copyright (C) 2006 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA. */
#include "defs.h"
#include "osabi.h"
#include "trad-frame.h"
#include "tramp-frame.h"
#include "obsd-tdep.h"
#include "arm-tdep.h"
#include "solib-svr4.h"
/* Signal trampolines. */
static void
armobsd_sigframe_init (const struct tramp_frame *self,
struct frame_info *next_frame,
struct trad_frame_cache *cache,
CORE_ADDR func)
{
CORE_ADDR sp, sigcontext_addr, addr;
int regnum;
/* We find the appropriate instance of `struct sigcontext' at a
fixed offset in the signal frame. */
sp = frame_unwind_register_signed (next_frame, ARM_SP_REGNUM);
sigcontext_addr = sp + 16;
/* PC. */
trad_frame_set_reg_addr (cache, ARM_PC_REGNUM, sigcontext_addr + 76);
/* GPRs. */
for (regnum = ARM_A1_REGNUM, addr = sigcontext_addr + 12;
regnum <= ARM_LR_REGNUM; regnum++, addr += 4)
trad_frame_set_reg_addr (cache, regnum, addr);
trad_frame_set_id (cache, frame_id_build (sp, func));
}
static const struct tramp_frame armobsd_sigframe =
{
SIGTRAMP_FRAME,
4,
{
{ 0xe28d0010, -1 }, /* add r0, sp, #16 */
{ 0xef000067, -1 }, /* swi SYS_sigreturn */
{ 0xef000001, -1 }, /* swi SYS_exit */
{ 0xeafffffc, -1 }, /* b . - 8 */
{ TRAMP_SENTINEL_INSN, -1 }
},
armobsd_sigframe_init
};
static void
armobsd_init_abi (struct gdbarch_info info,
struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
if (tdep->fp_model == ARM_FLOAT_AUTO)
tdep->fp_model = ARM_FLOAT_SOFT_VFP;
tramp_frame_prepend_unwinder (gdbarch, &armobsd_sigframe);
/* OpenBSD/arm uses SVR4-style shared libraries. */
set_solib_svr4_fetch_link_map_offsets
(gdbarch, svr4_ilp32_fetch_link_map_offsets);
set_gdbarch_skip_solib_resolver (gdbarch, obsd_skip_solib_resolver);
tdep->jb_pc = 24;
tdep->jb_elt_size = 4;
}
void
_initialize_armobsd_tdep (void)
{
gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_OPENBSD_ELF,
armobsd_init_abi);
}
|
