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
|
/* Motorola m68k native support for Linux
Copyright 1996, 1998, 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 "frame.h"
#include "inferior.h"
#include "language.h"
#include "gdbcore.h"
#include "regcache.h"
#ifdef USG
#include <sys/types.h>
#endif
#include <sys/param.h>
#include <sys/dir.h>
#include <signal.h>
#include <sys/user.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <sys/procfs.h>
#include <sys/file.h>
#include "gdb_stat.h"
#include "floatformat.h"
#include "target.h"
/* This table must line up with REGISTER_NAMES in tm-m68k.h */
static const int regmap[] =
{
PT_D0, PT_D1, PT_D2, PT_D3, PT_D4, PT_D5, PT_D6, PT_D7,
PT_A0, PT_A1, PT_A2, PT_A3, PT_A4, PT_A5, PT_A6, PT_USP,
PT_SR, PT_PC,
/* PT_FP0, ..., PT_FP7 */
21, 24, 27, 30, 33, 36, 39, 42,
/* PT_FPCR, PT_FPSR, PT_FPIAR */
45, 46, 47
};
/* BLOCKEND is the value of u.u_ar0, and points to the place where GS
is stored. */
int
m68k_linux_register_u_addr (int blockend, int regnum)
{
return (blockend + 4 * regmap[regnum]);
}
/* Given a pointer to a general register set in /proc format (gregset_t *),
unpack the register contents and supply them as gdb's idea of the current
register values. */
/* Note both m68k-tdep.c and m68klinux-nat.c contain definitions
for supply_gregset and supply_fpregset. The definitions
in m68k-tdep.c are valid if USE_PROC_FS is defined. Otherwise,
the definitions in m68klinux-nat.c will be used. This is a
bit of a hack. The supply_* routines do not belong in
*_tdep.c files. But, there are several lynx ports that currently
depend on these definitions. */
#ifndef USE_PROC_FS
/* Prototypes for supply_gregset etc. */
#include "gregset.h"
void
supply_gregset (gregset_t *gregsetp)
{
int regi;
for (regi = D0_REGNUM; regi <= SP_REGNUM; regi++)
supply_register (regi, (char *) (*gregsetp + regmap[regi]));
supply_register (PS_REGNUM, (char *) (*gregsetp + PT_SR));
supply_register (PC_REGNUM, (char *) (*gregsetp + PT_PC));
}
/* Given a pointer to a floating point register set in /proc format
(fpregset_t *), unpack the register contents and supply them as gdb's
idea of the current floating point register values. */
void
supply_fpregset (fpregset_t *fpregsetp)
{
int regi;
for (regi = FP0_REGNUM; regi < FPC_REGNUM; regi++)
supply_register (regi, (char *) &fpregsetp->fpregs[(regi - FP0_REGNUM) * 3]);
supply_register (FPC_REGNUM, (char *) &fpregsetp->fpcntl[0]);
supply_register (FPS_REGNUM, (char *) &fpregsetp->fpcntl[1]);
supply_register (FPI_REGNUM, (char *) &fpregsetp->fpcntl[2]);
}
#endif
int
kernel_u_size (void)
{
return (sizeof (struct user));
}
/* Return non-zero if PC points into the signal trampoline. */
int
in_sigtramp (CORE_ADDR pc)
{
CORE_ADDR sp;
char buf[TARGET_SHORT_BIT / TARGET_CHAR_BIT];
int insn;
sp = read_register (SP_REGNUM);
if (pc - 2 < sp)
return 0;
if (read_memory_nobpt (pc, buf, sizeof (buf)))
return 0;
insn = extract_unsigned_integer (buf, sizeof (buf));
if (insn == 0xdefc /* addaw #,sp */
|| insn == 0x7077 /* moveq #119,d0 */
|| insn == 0x4e40 /* trap #0 */
|| insn == 0x203c /* movel #,d0 */ )
return 1;
if (read_memory_nobpt (pc - 2, buf, sizeof (buf)))
return 0;
insn = extract_unsigned_integer (buf, sizeof (buf));
if (insn == 0xdefc /* addaw #,sp */
|| insn == 0x7077 /* moveq #119,d0 */
|| insn == 0x4e40 /* trap #0 */
|| insn == 0x203c /* movel #,d0 */ )
return 1;
return 0;
}
|
