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
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
|
/* Target-dependent code for GNU/Linux on CSKY.
Copyright (C) 2012-2021 Free Software Foundation, Inc.
Contributed by C-SKY Microsystems and Mentor Graphics.
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 3 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, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "osabi.h"
#include "glibc-tdep.h"
#include "linux-tdep.h"
#include "gdbarch.h"
#include "solib-svr4.h"
#include "regset.h"
#include "trad-frame.h"
#include "tramp-frame.h"
#include "csky-tdep.h"
/* Functions, definitions, and data structures for C-Sky core file debug. */
/* General regset pc, r1, r0, psr, r2-r31 for CK810. */
#define SIZEOF_CSKY_GREGSET 34*4
/* Float regset fesr fsr fr0-fr31 for CK810. */
#define SIZEOF_CSKY_FREGSET 34*4
/* Offset mapping table from core_section to regcache of general
registers for ck810. */
static const int csky_gregset_offset[] =
{
72, 1, 0, 89, 2, /* pc, r1, r0, psr, r2. */
3, 4, 5, 6, 7, /* r3 ~ r32. */
8, 9, 10, 11, 12,
13, 14, 15, 16, 17,
18, 19, 20, 21, 22,
23, 24, 25, 26, 27,
28, 29, 30, 31
};
/* Offset mapping table from core_section to regcache of float
registers for ck810. */
static const int csky_fregset_offset[] =
{
122, 123, 40, 41, 42, /* fcr, fesr, fr0 ~ fr2. */
43, 44, 45, 46, 47, /* fr3 ~ fr15. */
48, 49, 50, 51, 52,
53, 54, 55
};
/* Implement the supply_regset hook for GP registers in core files. */
static void
csky_supply_gregset (const struct regset *regset,
struct regcache *regcache, int regnum,
const void *regs, size_t len)
{
int i, gregset_num;
const gdb_byte *gregs = (const gdb_byte *) regs ;
gdb_assert (len >= SIZEOF_CSKY_GREGSET);
gregset_num = ARRAY_SIZE (csky_gregset_offset);
for (i = 0; i < gregset_num; i++)
{
if ((regnum == csky_gregset_offset[i] || regnum == -1)
&& csky_gregset_offset[i] != -1)
regcache->raw_supply (csky_gregset_offset[i], gregs + 4 * i);
}
}
/* Implement the collect_regset hook for GP registers in core files. */
static void
csky_collect_gregset (const struct regset *regset,
const struct regcache *regcache,
int regnum, void *gregs_buf, size_t len)
{
int regno, gregset_num;
gdb_byte *gregs = (gdb_byte *) gregs_buf ;
gdb_assert (len >= SIZEOF_CSKY_GREGSET);
gregset_num = ARRAY_SIZE (csky_gregset_offset);
for (regno = 0; regno < gregset_num; regno++)
{
if ((regnum == csky_gregset_offset[regno] || regnum == -1)
&& csky_gregset_offset[regno] != -1)
regcache->raw_collect (regno,
gregs + 4 + csky_gregset_offset[regno]);
}
}
/* Implement the supply_regset hook for FP registers in core files. */
static void
csky_supply_fregset (const struct regset *regset,
struct regcache *regcache, int regnum,
const void *regs, size_t len)
{
int i;
int offset = 0;
struct gdbarch *gdbarch = regcache->arch ();
const gdb_byte *fregs = (const gdb_byte *) regs;
int fregset_num = ARRAY_SIZE (csky_fregset_offset);
gdb_assert (len >= SIZEOF_CSKY_FREGSET);
for (i = 0; i < fregset_num; i++)
{
if ((regnum == csky_fregset_offset[i] || regnum == -1)
&& csky_fregset_offset[i] != -1)
{
int num = csky_fregset_offset[i];
offset += register_size (gdbarch, num);
regcache->raw_supply (csky_fregset_offset[i], fregs + offset);
}
}
}
/* Implement the collect_regset hook for FP registers in core files. */
static void
csky_collect_fregset (const struct regset *regset,
const struct regcache *regcache,
int regnum, void *fregs_buf, size_t len)
{
int regno;
struct gdbarch *gdbarch = regcache->arch ();
gdb_byte *fregs = (gdb_byte *) fregs_buf ;
int fregset_num = ARRAY_SIZE (csky_fregset_offset);
int offset = 0;
gdb_assert (len >= SIZEOF_CSKY_FREGSET);
for (regno = 0; regno < fregset_num; regno++)
{
if ((regnum == csky_fregset_offset[regno] || regnum == -1)
&& csky_fregset_offset[regno] != -1)
{
offset += register_size (gdbarch, csky_fregset_offset[regno]);
regcache->raw_collect (regno, fregs + offset);
}
}
}
static const struct regset csky_regset_general =
{
NULL,
csky_supply_gregset,
csky_collect_gregset
};
static const struct regset csky_regset_float =
{
NULL,
csky_supply_fregset,
csky_collect_fregset
};
/* Iterate over core file register note sections. */
static void
csky_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
iterate_over_regset_sections_cb *cb,
void *cb_data,
const struct regcache *regcache)
{
cb (".reg", sizeof (csky_gregset_offset), sizeof (csky_gregset_offset),
&csky_regset_general, NULL, cb_data);
cb (".reg2", sizeof (csky_fregset_offset), sizeof (csky_fregset_offset),
&csky_regset_float, NULL, cb_data);
}
static void
csky_linux_rt_sigreturn_init (const struct tramp_frame *self,
struct frame_info *this_frame,
struct trad_frame_cache *this_cache,
CORE_ADDR func)
{
int i;
CORE_ADDR sp = get_frame_register_unsigned (this_frame, 14);
CORE_ADDR base = sp + CSKY_SIGINFO_OFFSET + CSKY_SIGINFO_SIZE
+ CSKY_UCONTEXT_SIGCONTEXT
+ CSKY_SIGCONTEXT_SC_USP
+ CSKY_SIGCONTEXT_SC_A0;
/* Set addrs of R0 ~ R13. */
for (i = 0; i < 14; i++)
trad_frame_set_reg_addr (this_cache, i, base + i * 4);
/* Set addrs of SP(R14) and R15. */
trad_frame_set_reg_addr (this_cache, 14, base - 4);
trad_frame_set_reg_addr (this_cache, 15, base + 4 * 14);
/* Set addrs of R16 ~ R31. */
for (i = 15; i < 31; i++)
trad_frame_set_reg_addr (this_cache, i, base + i * 4);
/* Set addrs of PSR and PC. */
trad_frame_set_reg_addr (this_cache, 89, base + 4 * 33);
trad_frame_set_reg_addr (this_cache, 72, base + 4 * 34);
trad_frame_set_id (this_cache, frame_id_build (sp, func));
}
static struct tramp_frame
csky_linux_rt_sigreturn_tramp_frame = {
SIGTRAMP_FRAME,
4,
{
{ CSKY_MOVI_R7_173, ULONGEST_MAX },
{ CSKY_TRAP_0, ULONGEST_MAX },
{ TRAMP_SENTINEL_INSN }
},
csky_linux_rt_sigreturn_init
};
/* Hook function for gdbarch_register_osabi. */
static void
csky_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
linux_init_abi (info, gdbarch, 0);
/* Shared library handling. */
set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
set_solib_svr4_fetch_link_map_offsets (gdbarch,
linux_ilp32_fetch_link_map_offsets);
/* Enable TLS support. */
set_gdbarch_fetch_tls_load_module_address (gdbarch,
svr4_fetch_objfile_link_map);
/* Core file support. */
set_gdbarch_iterate_over_regset_sections (
gdbarch, csky_linux_iterate_over_regset_sections);
/* Append tramp frame unwinder for SIGNAL. */
tramp_frame_prepend_unwinder (gdbarch,
&csky_linux_rt_sigreturn_tramp_frame);
}
void _initialize_csky_linux_tdep ();
void
_initialize_csky_linux_tdep ()
{
gdbarch_register_osabi (bfd_arch_csky, 0, GDB_OSABI_LINUX,
csky_linux_init_abi);
}
|
