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
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
|
/* Copyright (C) 2010-2014 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 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 "server.h"
#include "lynx-low.h"
#include <stdint.h>
#include <limits.h>
#include <sys/ptrace.h>
/* The following two typedefs are defined in a .h file which is not
in the standard include path (/sys/include/family/x86/ucontext.h),
so we just duplicate them here. */
/* General register context */
typedef struct usr_econtext {
uint32_t uec_fault;
uint32_t uec_es;
uint32_t uec_ds;
uint32_t uec_edi;
uint32_t uec_esi;
uint32_t uec_ebp;
uint32_t uec_temp;
uint32_t uec_ebx;
uint32_t uec_edx;
uint32_t uec_ecx;
uint32_t uec_eax;
uint32_t uec_inum;
uint32_t uec_ecode;
uint32_t uec_eip;
uint32_t uec_cs;
uint32_t uec_eflags;
uint32_t uec_esp;
uint32_t uec_ss;
uint32_t uec_fs;
uint32_t uec_gs;
} usr_econtext_t;
/* Floating point and SIMD register context */
typedef struct usr_fcontext {
uint16_t ufc_control;
uint16_t ufc_status;
uint16_t ufc_tag;
uint16_t ufc_opcode;
uint8_t *ufc_inst_off;
uint32_t ufc_inst_sel;
uint8_t *ufc_data_off;
uint32_t ufc_data_sel;
uint32_t usse_mxcsr;
uint32_t usse_mxcsr_mask;
struct ufp387_real {
uint16_t umant4;
uint16_t umant3;
uint16_t umant2;
uint16_t umant1;
uint16_t us_and_e;
uint16_t ureserved_1;
uint16_t ureserved_2;
uint16_t ureserved_3;
} ufc_reg[8];
struct uxmm_register {
uint16_t uchunk_1;
uint16_t uchunk_2;
uint16_t uchunk_3;
uint16_t uchunk_4;
uint16_t uchunk_5;
uint16_t uchunk_6;
uint16_t uchunk_7;
uint16_t uchunk_8;
} uxmm_reg[8];
char ureserved[16][14];
} usr_fcontext_t;
/* The index of various registers inside the regcache. */
enum lynx_i386_gdb_regnum
{
I386_EAX_REGNUM,
I386_ECX_REGNUM,
I386_EDX_REGNUM,
I386_EBX_REGNUM,
I386_ESP_REGNUM,
I386_EBP_REGNUM,
I386_ESI_REGNUM,
I386_EDI_REGNUM,
I386_EIP_REGNUM,
I386_EFLAGS_REGNUM,
I386_CS_REGNUM,
I386_SS_REGNUM,
I386_DS_REGNUM,
I386_ES_REGNUM,
I386_FS_REGNUM,
I386_GS_REGNUM,
I386_ST0_REGNUM,
I386_FCTRL_REGNUM = I386_ST0_REGNUM + 8,
I386_FSTAT_REGNUM,
I386_FTAG_REGNUM,
I386_FISEG_REGNUM,
I386_FIOFF_REGNUM,
I386_FOSEG_REGNUM,
I386_FOOFF_REGNUM,
I386_FOP_REGNUM,
I386_XMM0_REGNUM = 32,
I386_MXCSR_REGNUM = I386_XMM0_REGNUM + 8,
I386_SENTINEL_REGUM
};
/* Defined in auto-generated file i386.c. */
extern void init_registers_i386 (void);
extern const struct target_desc *tdesc_i386;
/* The fill_function for the general-purpose register set. */
static void
lynx_i386_fill_gregset (struct regcache *regcache, char *buf)
{
#define lynx_i386_collect_gp(regnum, fld) \
collect_register (regcache, regnum, \
buf + offsetof (usr_econtext_t, uec_##fld))
lynx_i386_collect_gp (I386_EAX_REGNUM, eax);
lynx_i386_collect_gp (I386_ECX_REGNUM, ecx);
lynx_i386_collect_gp (I386_EDX_REGNUM, edx);
lynx_i386_collect_gp (I386_EBX_REGNUM, ebx);
lynx_i386_collect_gp (I386_ESP_REGNUM, esp);
lynx_i386_collect_gp (I386_EBP_REGNUM, ebp);
lynx_i386_collect_gp (I386_ESI_REGNUM, esi);
lynx_i386_collect_gp (I386_EDI_REGNUM, edi);
lynx_i386_collect_gp (I386_EIP_REGNUM, eip);
lynx_i386_collect_gp (I386_EFLAGS_REGNUM, eflags);
lynx_i386_collect_gp (I386_CS_REGNUM, cs);
lynx_i386_collect_gp (I386_SS_REGNUM, ss);
lynx_i386_collect_gp (I386_DS_REGNUM, ds);
lynx_i386_collect_gp (I386_ES_REGNUM, es);
lynx_i386_collect_gp (I386_FS_REGNUM, fs);
lynx_i386_collect_gp (I386_GS_REGNUM, gs);
}
/* The store_function for the general-purpose register set. */
static void
lynx_i386_store_gregset (struct regcache *regcache, const char *buf)
{
#define lynx_i386_supply_gp(regnum, fld) \
supply_register (regcache, regnum, \
buf + offsetof (usr_econtext_t, uec_##fld))
lynx_i386_supply_gp (I386_EAX_REGNUM, eax);
lynx_i386_supply_gp (I386_ECX_REGNUM, ecx);
lynx_i386_supply_gp (I386_EDX_REGNUM, edx);
lynx_i386_supply_gp (I386_EBX_REGNUM, ebx);
lynx_i386_supply_gp (I386_ESP_REGNUM, esp);
lynx_i386_supply_gp (I386_EBP_REGNUM, ebp);
lynx_i386_supply_gp (I386_ESI_REGNUM, esi);
lynx_i386_supply_gp (I386_EDI_REGNUM, edi);
lynx_i386_supply_gp (I386_EIP_REGNUM, eip);
lynx_i386_supply_gp (I386_EFLAGS_REGNUM, eflags);
lynx_i386_supply_gp (I386_CS_REGNUM, cs);
lynx_i386_supply_gp (I386_SS_REGNUM, ss);
lynx_i386_supply_gp (I386_DS_REGNUM, ds);
lynx_i386_supply_gp (I386_ES_REGNUM, es);
lynx_i386_supply_gp (I386_FS_REGNUM, fs);
lynx_i386_supply_gp (I386_GS_REGNUM, gs);
}
/* Extract the first 16 bits of register REGNUM in the REGCACHE,
and store these 2 bytes at DEST.
This is useful to collect certain 16bit registers which are known
by GDBserver as 32bit registers (such as the Control Register
for instance). */
static void
collect_16bit_register (struct regcache *regcache, int regnum, char *dest)
{
gdb_byte word[4];
collect_register (regcache, regnum, word);
memcpy (dest, word, 2);
}
/* The fill_function for the floating-point register set. */
static void
lynx_i386_fill_fpregset (struct regcache *regcache, char *buf)
{
int i;
/* Collect %st0 .. %st7. */
for (i = 0; i < 8; i++)
collect_register (regcache, I386_ST0_REGNUM + i,
buf + offsetof (usr_fcontext_t, ufc_reg)
+ i * sizeof (struct ufp387_real));
/* Collect the other FPU registers. */
collect_16bit_register (regcache, I386_FCTRL_REGNUM,
buf + offsetof (usr_fcontext_t, ufc_control));
collect_16bit_register (regcache, I386_FSTAT_REGNUM,
buf + offsetof (usr_fcontext_t, ufc_status));
collect_16bit_register (regcache, I386_FTAG_REGNUM,
buf + offsetof (usr_fcontext_t, ufc_tag));
collect_register (regcache, I386_FISEG_REGNUM,
buf + offsetof (usr_fcontext_t, ufc_inst_sel));
collect_register (regcache, I386_FIOFF_REGNUM,
buf + offsetof (usr_fcontext_t, ufc_inst_off));
collect_register (regcache, I386_FOSEG_REGNUM,
buf + offsetof (usr_fcontext_t, ufc_data_sel));
collect_register (regcache, I386_FOOFF_REGNUM,
buf + offsetof (usr_fcontext_t, ufc_data_off));
collect_16bit_register (regcache, I386_FOP_REGNUM,
buf + offsetof (usr_fcontext_t, ufc_opcode));
/* Collect the XMM registers. */
for (i = 0; i < 8; i++)
collect_register (regcache, I386_XMM0_REGNUM + i,
buf + offsetof (usr_fcontext_t, uxmm_reg)
+ i * sizeof (struct uxmm_register));
collect_register (regcache, I386_MXCSR_REGNUM,
buf + offsetof (usr_fcontext_t, usse_mxcsr));
}
/* This is the supply counterpart for collect_16bit_register:
It extracts a 2byte value from BUF, and uses that value to
set REGNUM's value in the regcache.
This is useful to supply the value of certain 16bit registers
which are known by GDBserver as 32bit registers (such as the Control
Register for instance). */
static void
supply_16bit_register (struct regcache *regcache, int regnum, const char *buf)
{
gdb_byte word[4];
memcpy (word, buf, 2);
memset (word + 2, 0, 2);
supply_register (regcache, regnum, word);
}
/* The store_function for the floating-point register set. */
static void
lynx_i386_store_fpregset (struct regcache *regcache, const char *buf)
{
int i;
/* Store the %st0 .. %st7 registers. */
for (i = 0; i < 8; i++)
supply_register (regcache, I386_ST0_REGNUM + i,
buf + offsetof (usr_fcontext_t, ufc_reg)
+ i * sizeof (struct ufp387_real));
/* Store the other FPU registers. */
supply_16bit_register (regcache, I386_FCTRL_REGNUM,
buf + offsetof (usr_fcontext_t, ufc_control));
supply_16bit_register (regcache, I386_FSTAT_REGNUM,
buf + offsetof (usr_fcontext_t, ufc_status));
supply_16bit_register (regcache, I386_FTAG_REGNUM,
buf + offsetof (usr_fcontext_t, ufc_tag));
supply_register (regcache, I386_FISEG_REGNUM,
buf + offsetof (usr_fcontext_t, ufc_inst_sel));
supply_register (regcache, I386_FIOFF_REGNUM,
buf + offsetof (usr_fcontext_t, ufc_inst_off));
supply_register (regcache, I386_FOSEG_REGNUM,
buf + offsetof (usr_fcontext_t, ufc_data_sel));
supply_register (regcache, I386_FOOFF_REGNUM,
buf + offsetof (usr_fcontext_t, ufc_data_off));
supply_16bit_register (regcache, I386_FOP_REGNUM,
buf + offsetof (usr_fcontext_t, ufc_opcode));
/* Store the XMM registers. */
for (i = 0; i < 8; i++)
supply_register (regcache, I386_XMM0_REGNUM + i,
buf + offsetof (usr_fcontext_t, uxmm_reg)
+ i * sizeof (struct uxmm_register));
supply_register (regcache, I386_MXCSR_REGNUM,
buf + offsetof (usr_fcontext_t, usse_mxcsr));
}
/* Implements the lynx_target_ops.arch_setup routine. */
static void
lynx_i386_arch_setup (void)
{
init_registers_i386 ();
lynx_tdesc = tdesc_i386;
}
/* Description of all the x86-lynx register sets. */
struct lynx_regset_info lynx_target_regsets[] = {
/* General Purpose Registers. */
{PTRACE_GETREGS, PTRACE_SETREGS, sizeof(usr_econtext_t),
lynx_i386_fill_gregset, lynx_i386_store_gregset},
/* Floating Point Registers. */
{ PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof(usr_fcontext_t),
lynx_i386_fill_fpregset, lynx_i386_store_fpregset },
/* End of list marker. */
{0, 0, -1, NULL, NULL }
};
/* The lynx_target_ops vector for x86-lynx. */
struct lynx_target_ops the_low_target = {
lynx_i386_arch_setup,
};
|
