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
|
/*
* linux/arch/ppc64/kernel/ptrace-common.h
*
* Copyright (c) 2002 Stephen Rothwell, IBM Coproration
* Extracted from ptrace.c and ptrace32.c
*
* This file is subject to the terms and conditions of the GNU General
* Public License. See the file README.legal in the main directory of
* this archive for more details.
*/
#ifndef _PPC64_PTRACE_COMMON_H
#define _PPC64_PTRACE_COMMON_H
#include <linux/config.h>
#include <asm/system.h>
/*
* Set of msr bits that gdb can change on behalf of a process.
*/
#define MSR_DEBUGCHANGE (MSR_FE0 | MSR_SE | MSR_BE | MSR_FE1)
/*
* Get contents of register REGNO in task TASK.
*/
static inline unsigned long get_reg(struct task_struct *task, int regno)
{
unsigned long tmp = 0;
/*
* Put the correct FP bits in, they might be wrong as a result
* of our lazy FP restore.
*/
if (regno == PT_MSR) {
tmp = ((unsigned long *)task->thread.regs)[PT_MSR];
tmp |= task->thread.fpexc_mode;
} else if (regno < (sizeof(struct pt_regs) / sizeof(unsigned long))) {
tmp = ((unsigned long *)task->thread.regs)[regno];
}
return tmp;
}
/*
* Write contents of register REGNO in task TASK.
*/
static inline int put_reg(struct task_struct *task, int regno,
unsigned long data)
{
if (regno < PT_SOFTE) {
if (regno == PT_MSR)
data = (data & MSR_DEBUGCHANGE)
| (task->thread.regs->msr & ~MSR_DEBUGCHANGE);
((unsigned long *)task->thread.regs)[regno] = data;
return 0;
}
return -EIO;
}
static inline void set_single_step(struct task_struct *task)
{
struct pt_regs *regs = task->thread.regs;
if (regs != NULL)
regs->msr |= MSR_SE;
set_tsk_thread_flag(task, TIF_SINGLESTEP);
}
static inline void clear_single_step(struct task_struct *task)
{
struct pt_regs *regs = task->thread.regs;
if (regs != NULL)
regs->msr &= ~MSR_SE;
clear_tsk_thread_flag(task, TIF_SINGLESTEP);
}
#ifdef CONFIG_ALTIVEC
/*
* Get/set all the altivec registers vr0..vr31, vscr, vrsave, in one go.
* The transfer totals 34 quadword. Quadwords 0-31 contain the
* corresponding vector registers. Quadword 32 contains the vscr as the
* last word (offset 12) within that quadword. Quadword 33 contains the
* vrsave as the first word (offset 0) within the quadword.
*
* This definition of the VMX state is compatible with the current PPC32
* ptrace interface. This allows signal handling and ptrace to use the
* same structures. This also simplifies the implementation of a bi-arch
* (combined (32- and 64-bit) gdb.
*/
/*
* Get contents of AltiVec register state in task TASK
*/
static inline int get_vrregs(unsigned long __user *data,
struct task_struct *task)
{
unsigned long regsize;
/* copy AltiVec registers VR[0] .. VR[31] */
regsize = 32 * sizeof(vector128);
if (copy_to_user(data, task->thread.vr, regsize))
return -EFAULT;
data += (regsize / sizeof(unsigned long));
/* copy VSCR */
regsize = 1 * sizeof(vector128);
if (copy_to_user(data, &task->thread.vscr, regsize))
return -EFAULT;
data += (regsize / sizeof(unsigned long));
/* copy VRSAVE */
if (put_user(task->thread.vrsave, (u32 __user *)data))
return -EFAULT;
return 0;
}
/*
* Write contents of AltiVec register state into task TASK.
*/
static inline int set_vrregs(struct task_struct *task,
unsigned long __user *data)
{
unsigned long regsize;
/* copy AltiVec registers VR[0] .. VR[31] */
regsize = 32 * sizeof(vector128);
if (copy_from_user(task->thread.vr, data, regsize))
return -EFAULT;
data += (regsize / sizeof(unsigned long));
/* copy VSCR */
regsize = 1 * sizeof(vector128);
if (copy_from_user(&task->thread.vscr, data, regsize))
return -EFAULT;
data += (regsize / sizeof(unsigned long));
/* copy VRSAVE */
if (get_user(task->thread.vrsave, (u32 __user *)data))
return -EFAULT;
return 0;
}
#endif
static inline int ptrace_set_debugreg(struct task_struct *task,
unsigned long addr, unsigned long data)
{
/* We only support one DABR and no IABRS at the moment */
if (addr > 0)
return -EINVAL;
/* The bottom 3 bits are flags */
if ((data & ~0x7UL) >= TASK_SIZE)
return -EIO;
/* Ensure translation is on */
if (data && !(data & DABR_TRANSLATION))
return -EIO;
task->thread.dabr = data;
return 0;
}
#endif /* _PPC64_PTRACE_COMMON_H */
|
