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
|
/* Dump registers.
Copyright (C) 1998-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Andreas Schwab <schwab@gnu.org>.
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 <stddef.h>
#include <sys/uio.h>
#include <_itoa.h>
/* We will print the register dump in this format:
D0: XXXXXXXX D1: XXXXXXXX D2: XXXXXXXX D3: XXXXXXXX
D4: XXXXXXXX D5: XXXXXXXX D6: XXXXXXXX D7: XXXXXXXX
A0: XXXXXXXX A1: XXXXXXXX A2: XXXXXXXX A3: XXXXXXXX
A4: XXXXXXXX A5: XXXXXXXX A6: XXXXXXXX A7: XXXXXXXX
PC: XXXXXXXX SR: XXXX
OldMask: XXXXXXXX Vector: XXXX
FP0: XXXXXXXXXXXXXXXXXXXXXXXX FP1: XXXXXXXXXXXXXXXXXXXXXXXX
FP2: XXXXXXXXXXXXXXXXXXXXXXXX FP3: XXXXXXXXXXXXXXXXXXXXXXXX
FP4: XXXXXXXXXXXXXXXXXXXXXXXX FP5: XXXXXXXXXXXXXXXXXXXXXXXX
FP6: XXXXXXXXXXXXXXXXXXXXXXXX FP7: XXXXXXXXXXXXXXXXXXXXXXXX
FPCR: XXXXXXXX FPSR: XXXXXXXX FPIAR: XXXXXXXX
*/
/* Linux saves only the call-clobbered registers in the sigcontext. We
need to use a trampoline that saves the rest so that the C code can
access them. We use the sc_fpstate field, since the handler is not
supposed to return anyway, thus it doesn't matter that it's clobbered. */
/* static */ void catch_segfault (int, int, struct sigcontext *);
/* Dummy function so that we can use asm with arguments. */
static void __attribute_used__
__dummy__ (void)
{
asm ("\n\
catch_segfault:\n\
move.l 12(%%sp),%%a0\n\
lea %c0(%%a0),%%a0\n\
/* Clear the first 4 bytes to make it a null fp state, just\n\
in case the handler does return. */\n\
clr.l (%%a0)+\n\
movem.l %%d2-%%d7/%%a2-%%a6,(%%a0)\n"
#ifndef __mcoldfire__
"fmovem.x %%fp2-%%fp7,11*4(%%a0)\n"
#elif defined __mcffpu__
"fmovem.d %%fp2-%%fp7,11*4(%%a0)\n"
#endif
"jra real_catch_segfault"
: : "n" (offsetof (struct sigcontext, sc_fpstate)));
}
#define catch_segfault(a,b) \
__attribute_used__ real_catch_segfault(a,b)
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[20][8];
char fpregs[11][24];
struct iovec iov[63], *next_iov = iov;
unsigned long *p = (unsigned long *) ctx->sc_fpstate + 1;
unsigned long *pfp = (unsigned long *) ctx->sc_fpregs;
int i, j, fpreg_size;
#define ADD_STRING(str) \
next_iov->iov_base = (char *) (str); \
next_iov->iov_len = strlen (str); \
++next_iov
#define ADD_MEM(str, len) \
next_iov->iov_base = (str); \
next_iov->iov_len = (len); \
++next_iov
#ifdef __mcoldfire__
fpreg_size = 16;
#else
fpreg_size = 24;
#endif
/* Generate strings of register contents. */
hexvalue (ctx->sc_d0, regs[0], 8);
hexvalue (ctx->sc_d1, regs[1], 8);
hexvalue (*p++, regs[2], 8);
hexvalue (*p++, regs[3], 8);
hexvalue (*p++, regs[4], 8);
hexvalue (*p++, regs[5], 8);
hexvalue (*p++, regs[6], 8);
hexvalue (*p++, regs[7], 8);
hexvalue (ctx->sc_a0, regs[8], 8);
hexvalue (ctx->sc_a1, regs[9], 8);
hexvalue (*p++, regs[10], 8);
hexvalue (*p++, regs[11], 8);
hexvalue (*p++, regs[12], 8);
hexvalue (*p++, regs[13], 8);
hexvalue (*p++, regs[14], 8);
hexvalue (ctx->sc_usp, regs[15], 8);
hexvalue (ctx->sc_pc, regs[16], 8);
hexvalue (ctx->sc_sr, regs[17], 4);
hexvalue (ctx->sc_mask, regs[18], 8);
hexvalue (ctx->sc_formatvec & 0xfff, regs[19], 4);
for (i = 0; i < 2; i++)
for (j = 0; j < fpreg_size; j += 8)
hexvalue (*pfp++, fpregs[i] + j, 8);
for (i = 2; i < 8; i++)
for (j = 0; j < fpreg_size; j += 8)
hexvalue (*p++, fpregs[i] + j, 8);
hexvalue (ctx->sc_fpcntl[0], fpregs[8], 8);
hexvalue (ctx->sc_fpcntl[1], fpregs[9], 8);
hexvalue (ctx->sc_fpcntl[2], fpregs[10], 8);
/* Generate the output. */
ADD_STRING ("Register dump:\n\n D0: ");
ADD_MEM (regs[0], 8);
ADD_STRING (" D1: ");
ADD_MEM (regs[1], 8);
ADD_STRING (" D2: ");
ADD_MEM (regs[2], 8);
ADD_STRING (" D3: ");
ADD_MEM (regs[3], 8);
ADD_STRING ("\n D4: ");
ADD_MEM (regs[4], 8);
ADD_STRING (" D5: ");
ADD_MEM (regs[5], 8);
ADD_STRING (" D6: ");
ADD_MEM (regs[6], 8);
ADD_STRING (" D7: ");
ADD_MEM (regs[7], 8);
ADD_STRING ("\n A0: ");
ADD_MEM (regs[8], 8);
ADD_STRING (" A1: ");
ADD_MEM (regs[9], 8);
ADD_STRING (" A2: ");
ADD_MEM (regs[10], 8);
ADD_STRING (" A3: ");
ADD_MEM (regs[11], 8);
ADD_STRING ("\n A4: ");
ADD_MEM (regs[12], 8);
ADD_STRING (" A5: ");
ADD_MEM (regs[13], 8);
ADD_STRING (" A6: ");
ADD_MEM (regs[14], 8);
ADD_STRING (" A7: ");
ADD_MEM (regs[15], 8);
ADD_STRING ("\n PC: ");
ADD_MEM (regs[16], 8);
ADD_STRING (" SR: ");
ADD_MEM (regs[17], 4);
ADD_STRING ("\n\n OldMask: ");
ADD_MEM (regs[18], 8);
ADD_STRING (" Vector: ");
ADD_MEM (regs[19], 4);
ADD_STRING ("\n\n FP0: ");
ADD_MEM (fpregs[0], fpreg_size);
ADD_STRING (" FP1: ");
ADD_MEM (fpregs[1], fpreg_size);
ADD_STRING ("\n FP2: ");
ADD_MEM (fpregs[2], fpreg_size);
ADD_STRING (" FP3: ");
ADD_MEM (fpregs[3], fpreg_size);
ADD_STRING ("\n FP4: ");
ADD_MEM (fpregs[4], fpreg_size);
ADD_STRING (" FP5: ");
ADD_MEM (fpregs[5], fpreg_size);
ADD_STRING ("\n FP6: ");
ADD_MEM (fpregs[6], fpreg_size);
ADD_STRING (" FP7: ");
ADD_MEM (fpregs[7], fpreg_size);
ADD_STRING ("\n FPCR: ");
ADD_MEM (fpregs[8], 8);
ADD_STRING (" FPSR: ");
ADD_MEM (fpregs[9], 8);
ADD_STRING (" FPIAR: ");
ADD_MEM (fpregs[10], 8);
ADD_STRING ("\n");
/* Write the stuff out. */
writev (fd, iov, next_iov - iov);
}
#define REGISTER_DUMP register_dump (fd, ctx)
|
