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
|
/* Native-dependent code for GNU/Linux on MIPS processors.
Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006
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., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA. */
#include "defs.h"
#include "mips-tdep.h"
#include "target.h"
#include "linux-nat.h"
#include "gdb_proc_service.h"
#ifndef PTRACE_GET_THREAD_AREA
#define PTRACE_GET_THREAD_AREA 25
#endif
/* Pseudo registers can not be read. ptrace does not provide a way to
read (or set) MIPS_PS_REGNUM, and there's no point in reading or
setting MIPS_ZERO_REGNUM. We also can not set BADVADDR, CAUSE, or
FCRIR via ptrace(). */
int
mips_linux_cannot_fetch_register (int regno)
{
if (regno > MIPS_ZERO_REGNUM && regno < MIPS_ZERO_REGNUM + 32)
return 0;
else if (regno >= mips_regnum (current_gdbarch)->fp0
&& regno <= mips_regnum (current_gdbarch)->fp0 + 32)
return 0;
else if (regno == mips_regnum (current_gdbarch)->lo
|| regno == mips_regnum (current_gdbarch)->hi
|| regno == mips_regnum (current_gdbarch)->badvaddr
|| regno == mips_regnum (current_gdbarch)->cause
|| regno == mips_regnum (current_gdbarch)->pc
|| regno == mips_regnum (current_gdbarch)->fp_control_status
|| regno == mips_regnum (current_gdbarch)->fp_implementation_revision)
return 0;
else
return 1;
}
int
mips_linux_cannot_store_register (int regno)
{
if (regno > MIPS_ZERO_REGNUM && regno < MIPS_ZERO_REGNUM + 32)
return 0;
else if (regno >= FP0_REGNUM && regno <= FP0_REGNUM + 32)
return 0;
else if (regno == mips_regnum (current_gdbarch)->lo
|| regno == mips_regnum (current_gdbarch)->hi
|| regno == mips_regnum (current_gdbarch)->pc
|| regno == mips_regnum (current_gdbarch)->fp_control_status)
return 0;
else
return 1;
}
/* Fetch the thread-local storage pointer for libthread_db. */
ps_err_e
ps_get_thread_area (const struct ps_prochandle *ph,
lwpid_t lwpid, int idx, void **base)
{
if (ptrace (PTRACE_GET_THREAD_AREA, lwpid, NULL, base) != 0)
return PS_ERR;
/* IDX is the bias from the thread pointer to the beginning of the
thread descriptor. It has to be subtracted due to implementation
quirks in libthread_db. */
*base = (void *) ((char *)*base - idx);
return PS_OK;
}
void _initialize_mips_linux_nat (void);
void
_initialize_mips_linux_nat (void)
{
add_target (linux_target ());
}
|
