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
|
/* Dump registers.
Copyright (C) 1998-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <sys/uio.h>
#include <_itoa.h>
/* We will print the register dump in this format:
EAX: XXXXXXXX EBX: XXXXXXXX ECX: XXXXXXXX EDX: XXXXXXXX
ESI: XXXXXXXX EDI: XXXXXXXX EBP: XXXXXXXX ESP: XXXXXXXX
EIP: XXXXXXXX EFLAGS: XXXXXXXX
CS: XXXX DS: XXXX ES: XXXX FS: XXXX GS: XXXX SS: XXXX
Trap: XXXXXXXX Error: XXXXXXXX OldMask: XXXXXXXX
ESP/SIGNAL: XXXXXXXX CR2: XXXXXXXX
FPUCW: XXXXXXXX FPUSW: XXXXXXXX TAG: XXXXXXXX
IPOFF: XXXXXXXX CSSEL: XXXX DATAOFF: XXXXXXXX DATASEL: XXXX
ST(0) XXXX XXXXXXXXXXXXXXXX ST(1) XXXX XXXXXXXXXXXXXXXX
ST(2) XXXX XXXXXXXXXXXXXXXX ST(3) XXXX XXXXXXXXXXXXXXXX
ST(4) XXXX XXXXXXXXXXXXXXXX ST(5) XXXX XXXXXXXXXXXXXXXX
ST(6) XXXX XXXXXXXXXXXXXXXX ST(7) XXXX XXXXXXXXXXXXXXXX
*/
static void
hexvalue (unsigned long int value, char *buf, size_t len)
{
char *cp = _itoa_word (value, buf + len, 16, 0);
while (cp > buf)
*--cp = '0';
}
static void
register_dump (int fd, struct sigcontext *ctx)
{
char regs[21][8];
char fpregs[31][8];
struct iovec iov[97];
size_t nr = 0;
#define ADD_STRING(str) \
iov[nr].iov_base = (char *) str; \
iov[nr].iov_len = strlen (str); \
++nr
#define ADD_MEM(str, len) \
iov[nr].iov_base = str; \
iov[nr].iov_len = len; \
++nr
/* Generate strings of register contents. */
hexvalue (ctx->eax, regs[0], 8);
hexvalue (ctx->ebx, regs[1], 8);
hexvalue (ctx->ecx, regs[2], 8);
hexvalue (ctx->edx, regs[3], 8);
hexvalue (ctx->esi, regs[4], 8);
hexvalue (ctx->edi, regs[5], 8);
hexvalue (ctx->ebp, regs[6], 8);
hexvalue (ctx->esp, regs[7], 8);
hexvalue (ctx->eip, regs[8], 8);
hexvalue (ctx->eflags, regs[9], 8);
hexvalue (ctx->cs, regs[10], 4);
hexvalue (ctx->ds, regs[11], 4);
hexvalue (ctx->es, regs[12], 4);
hexvalue (ctx->fs, regs[13], 4);
hexvalue (ctx->gs, regs[14], 4);
hexvalue (ctx->ss, regs[15], 4);
hexvalue (ctx->trapno, regs[16], 8);
hexvalue (ctx->err, regs[17], 8);
hexvalue (ctx->oldmask, regs[18], 8);
hexvalue (ctx->esp_at_signal, regs[19], 8);
hexvalue (ctx->cr2, regs[20], 8);
/* Generate the output. */
ADD_STRING ("Register dump:\n\n EAX: ");
ADD_MEM (regs[0], 8);
ADD_STRING (" EBX: ");
ADD_MEM (regs[1], 8);
ADD_STRING (" ECX: ");
ADD_MEM (regs[2], 8);
ADD_STRING (" EDX: ");
ADD_MEM (regs[3], 8);
ADD_STRING ("\n ESI: ");
ADD_MEM (regs[4], 8);
ADD_STRING (" EDI: ");
ADD_MEM (regs[5], 8);
ADD_STRING (" EBP: ");
ADD_MEM (regs[6], 8);
ADD_STRING (" ESP: ");
ADD_MEM (regs[7], 8);
ADD_STRING ("\n\n EIP: ");
ADD_MEM (regs[8], 8);
ADD_STRING (" EFLAGS: ");
ADD_MEM (regs[9], 8);
ADD_STRING ("\n\n CS: ");
ADD_MEM (regs[10], 4);
ADD_STRING (" DS: ");
ADD_MEM (regs[11], 4);
ADD_STRING (" ES: ");
ADD_MEM (regs[12], 4);
ADD_STRING (" FS: ");
ADD_MEM (regs[13], 4);
ADD_STRING (" GS: ");
ADD_MEM (regs[14], 4);
ADD_STRING (" SS: ");
ADD_MEM (regs[15], 4);
ADD_STRING ("\n\n Trap: ");
ADD_MEM (regs[16], 8);
ADD_STRING (" Error: ");
ADD_MEM (regs[17], 8);
ADD_STRING (" OldMask: ");
ADD_MEM (regs[18], 8);
ADD_STRING ("\n ESP/signal: ");
ADD_MEM (regs[19], 8);
ADD_STRING (" CR2: ");
ADD_MEM (regs[20], 8);
if (ctx->fpstate != NULL)
{
/* Generate output for the FPU control/status registers. */
hexvalue (ctx->fpstate->cw, fpregs[0], 8);
hexvalue (ctx->fpstate->sw, fpregs[1], 8);
hexvalue (ctx->fpstate->tag, fpregs[2], 8);
hexvalue (ctx->fpstate->ipoff, fpregs[3], 8);
hexvalue (ctx->fpstate->cssel, fpregs[4], 4);
hexvalue (ctx->fpstate->dataoff, fpregs[5], 8);
hexvalue (ctx->fpstate->datasel, fpregs[6], 4);
ADD_STRING ("\n\n FPUCW: ");
ADD_MEM (fpregs[0], 8);
ADD_STRING (" FPUSW: ");
ADD_MEM (fpregs[1], 8);
ADD_STRING (" TAG: ");
ADD_MEM (fpregs[2], 8);
ADD_STRING ("\n IPOFF: ");
ADD_MEM (fpregs[3], 8);
ADD_STRING (" CSSEL: ");
ADD_MEM (fpregs[4], 4);
ADD_STRING (" DATAOFF: ");
ADD_MEM (fpregs[5], 8);
ADD_STRING (" DATASEL: ");
ADD_MEM (fpregs[6], 4);
/* Now the real FPU registers. */
hexvalue (ctx->fpstate->_st[0].exponent, fpregs[7], 8);
hexvalue (ctx->fpstate->_st[0].significand[3] << 16
| ctx->fpstate->_st[0].significand[2], fpregs[8], 8);
hexvalue (ctx->fpstate->_st[0].significand[1] << 16
| ctx->fpstate->_st[0].significand[0], fpregs[9], 8);
hexvalue (ctx->fpstate->_st[1].exponent, fpregs[10], 8);
hexvalue (ctx->fpstate->_st[1].significand[3] << 16
| ctx->fpstate->_st[1].significand[2], fpregs[11], 8);
hexvalue (ctx->fpstate->_st[1].significand[1] << 16
| ctx->fpstate->_st[1].significand[0], fpregs[12], 8);
hexvalue (ctx->fpstate->_st[2].exponent, fpregs[13], 8);
hexvalue (ctx->fpstate->_st[2].significand[3] << 16
| ctx->fpstate->_st[2].significand[2], fpregs[14], 8);
hexvalue (ctx->fpstate->_st[2].significand[1] << 16
| ctx->fpstate->_st[2].significand[0], fpregs[15], 8);
hexvalue (ctx->fpstate->_st[3].exponent, fpregs[16], 8);
hexvalue (ctx->fpstate->_st[3].significand[3] << 16
| ctx->fpstate->_st[3].significand[2], fpregs[17], 8);
hexvalue (ctx->fpstate->_st[3].significand[1] << 16
| ctx->fpstate->_st[3].significand[0], fpregs[18], 8);
hexvalue (ctx->fpstate->_st[4].exponent, fpregs[19], 8);
hexvalue (ctx->fpstate->_st[4].significand[3] << 16
| ctx->fpstate->_st[4].significand[2], fpregs[20], 8);
hexvalue (ctx->fpstate->_st[4].significand[1] << 16
| ctx->fpstate->_st[4].significand[0], fpregs[21], 8);
hexvalue (ctx->fpstate->_st[5].exponent, fpregs[22], 8);
hexvalue (ctx->fpstate->_st[5].significand[3] << 16
| ctx->fpstate->_st[5].significand[2], fpregs[23], 8);
hexvalue (ctx->fpstate->_st[5].significand[1] << 16
| ctx->fpstate->_st[5].significand[0], fpregs[24], 8);
hexvalue (ctx->fpstate->_st[6].exponent, fpregs[25], 8);
hexvalue (ctx->fpstate->_st[6].significand[3] << 16
| ctx->fpstate->_st[6].significand[2], fpregs[26], 8);
hexvalue (ctx->fpstate->_st[6].significand[1] << 16
| ctx->fpstate->_st[6].significand[0], fpregs[27], 8);
hexvalue (ctx->fpstate->_st[7].exponent, fpregs[28], 8);
hexvalue (ctx->fpstate->_st[7].significand[3] << 16
| ctx->fpstate->_st[7].significand[2], fpregs[29], 8);
hexvalue (ctx->fpstate->_st[7].significand[1] << 16
| ctx->fpstate->_st[7].significand[0], fpregs[30], 8);
ADD_STRING ("\n\n ST(0) ");
ADD_MEM (fpregs[7], 4);
ADD_STRING (" ");
ADD_MEM (fpregs[8], 8);
ADD_MEM (fpregs[9], 8);
ADD_STRING (" ST(1) ");
ADD_MEM (fpregs[10], 4);
ADD_STRING (" ");
ADD_MEM (fpregs[11], 8);
ADD_MEM (fpregs[12], 8);
ADD_STRING ("\n ST(2) ");
ADD_MEM (fpregs[13], 4);
ADD_STRING (" ");
ADD_MEM (fpregs[14], 8);
ADD_MEM (fpregs[15], 8);
ADD_STRING (" ST(3) ");
ADD_MEM (fpregs[16], 4);
ADD_STRING (" ");
ADD_MEM (fpregs[17], 8);
ADD_MEM (fpregs[18], 8);
ADD_STRING ("\n ST(4) ");
ADD_MEM (fpregs[19], 4);
ADD_STRING (" ");
ADD_MEM (fpregs[20], 8);
ADD_MEM (fpregs[21], 8);
ADD_STRING (" ST(5) ");
ADD_MEM (fpregs[22], 4);
ADD_STRING (" ");
ADD_MEM (fpregs[23], 8);
ADD_MEM (fpregs[24], 8);
ADD_STRING ("\n ST(6) ");
ADD_MEM (fpregs[25], 4);
ADD_STRING (" ");
ADD_MEM (fpregs[26], 8);
ADD_MEM (fpregs[27], 8);
ADD_STRING (" ST(7) ");
ADD_MEM (fpregs[28], 4);
ADD_STRING (" ");
ADD_MEM (fpregs[29], 8);
ADD_MEM (fpregs[30], 8);
}
ADD_STRING ("\n");
/* Write the stuff out. */
writev (fd, iov, nr);
}
#define REGISTER_DUMP register_dump (fd, &ctx)
|
