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
|
/* Native support for MIPS running SVR4, for GDB.
Copyright 1994, 1995, 2000, 2001 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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "inferior.h"
#include "gdbcore.h"
#include "target.h"
#include "regcache.h"
#include <sys/time.h>
#include <sys/procfs.h>
#include <setjmp.h> /* For JB_XXX. */
/* Prototypes for supply_gregset etc. */
#include "gregset.h"
/* Size of elements in jmpbuf */
#define JB_ELEMENT_SIZE 4
/*
* See the comment in m68k-tdep.c regarding the utility of these functions.
*
* These definitions are from the MIPS SVR4 ABI, so they may work for
* any MIPS SVR4 target.
*/
void
supply_gregset (gregset_t *gregsetp)
{
int regi;
greg_t *regp = &(*gregsetp)[0];
char zerobuf[MAX_REGISTER_SIZE];
memset (zerobuf, 0, MAX_REGISTER_SIZE);
for (regi = 0; regi <= CXT_RA; regi++)
regcache_raw_supply (current_regcache, regi, (char *) (regp + regi));
regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->pc,
(char *) (regp + CXT_EPC));
regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->hi,
(char *) (regp + CXT_MDHI));
regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->lo,
(char *) (regp + CXT_MDLO));
regcache_raw_supply (current_regcache, mips_regnum (current_gdbarch)->cause,
(char *) (regp + CXT_CAUSE));
/* Fill inaccessible registers with zero. */
regcache_raw_supply (current_regcache, PS_REGNUM, zerobuf);
regcache_raw_supply (current_regcache,
mips_regnum (current_gdbarch)->badvaddr,
zerobuf);
regcache_raw_supply (current_regcache, DEPRECATED_FP_REGNUM, zerobuf);
regcache_raw_supply (current_regcache, UNUSED_REGNUM, zerobuf);
for (regi = FIRST_EMBED_REGNUM; regi <= LAST_EMBED_REGNUM; regi++)
regcache_raw_supply (current_regcache, regi, zerobuf);
}
void
fill_gregset (gregset_t *gregsetp, int regno)
{
int regi;
greg_t *regp = &(*gregsetp)[0];
for (regi = 0; regi <= 32; regi++)
if ((regno == -1) || (regno == regi))
*(regp + regi) = *(greg_t *) & deprecated_registers[DEPRECATED_REGISTER_BYTE (regi)];
if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->pc))
*(regp + CXT_EPC) = *(greg_t *) & deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->pc)];
if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->cause))
*(regp + CXT_CAUSE) = *(greg_t *) & deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->cause)];
if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->hi))
*(regp + CXT_MDHI) = *(greg_t *) & deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->hi)];
if ((regno == -1) || (regno == mips_regnum (current_gdbarch)->lo))
*(regp + CXT_MDLO) = *(greg_t *) & deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->lo)];
}
/*
* Now we do the same thing for floating-point registers.
* We don't bother to condition on FP0 regnum since any
* reasonable MIPS configuration has an R3010 in it.
*
* Again, see the comments in m68k-tdep.c.
*/
void
supply_fpregset (fpregset_t *fpregsetp)
{
int regi;
char zerobuf[MAX_REGISTER_SIZE];
memset (zerobuf, 0, MAX_REGISTER_SIZE);
for (regi = 0; regi < 32; regi++)
regcache_raw_supply (current_regcache,
mips_regnum (current_gdbarch)->fp0 + regi,
(char *) &fpregsetp->fp_r.fp_regs[regi]);
regcache_raw_supply (current_regcache,
mips_regnum (current_gdbarch)->fp_control_status,
(char *) &fpregsetp->fp_csr);
/* FIXME: how can we supply FCRIR? The ABI doesn't tell us. */
regcache_raw_supply (current_regcache,
mips_regnum (current_gdbarch)->fp_implementation_revision,
zerobuf);
}
void
fill_fpregset (fpregset_t *fpregsetp, int regno)
{
int regi;
char *from, *to;
for (regi = mips_regnum (current_gdbarch)->fp0;
regi < mips_regnum (current_gdbarch)->fp0 + 32; regi++)
{
if ((regno == -1) || (regno == regi))
{
from = (char *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (regi)];
to = (char *) &(fpregsetp->fp_r.fp_regs[regi - mips_regnum (current_gdbarch)->fp0]);
memcpy (to, from, register_size (current_gdbarch, regi));
}
}
if ((regno == -1)
|| (regno == mips_regnum (current_gdbarch)->fp_control_status))
fpregsetp->fp_csr = *(unsigned *) &deprecated_registers[DEPRECATED_REGISTER_BYTE (mips_regnum (current_gdbarch)->fp_control_status)];
}
/* Figure out where the longjmp will land.
We expect the first arg to be a pointer to the jmp_buf structure from which
we extract the pc (_JB_PC) that we will land at. The pc is copied into PC.
This routine returns true on success. */
int
get_longjmp_target (CORE_ADDR *pc)
{
char *buf;
CORE_ADDR jb_addr;
buf = alloca (TARGET_PTR_BIT / TARGET_CHAR_BIT);
jb_addr = read_register (A0_REGNUM);
if (target_read_memory (jb_addr + _JB_PC * JB_ELEMENT_SIZE, buf,
TARGET_PTR_BIT / TARGET_CHAR_BIT))
return 0;
*pc = extract_unsigned_integer (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT);
return 1;
}
|
