summaryrefslogtreecommitdiff
path: root/arch/powerpc/kernel/signal.h
blob: 618aeccdf69184464ec8dde6db4208c2fc3ab8eb (plain)
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
208
209
210
211
212
213
/*
 *    Copyright (c) 2007 Benjamin Herrenschmidt, IBM Corporation
 *    Extracted from signal_32.c and signal_64.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 _POWERPC_ARCH_SIGNAL_H
#define _POWERPC_ARCH_SIGNAL_H

void __user *get_sigframe(struct ksignal *ksig, struct task_struct *tsk,
			  size_t frame_size, int is_32);

extern int handle_signal32(struct ksignal *ksig, sigset_t *oldset,
			   struct task_struct *tsk);

extern int handle_rt_signal32(struct ksignal *ksig, sigset_t *oldset,
			      struct task_struct *tsk);

static inline int __get_user_sigset(sigset_t *dst, const sigset_t __user *src)
{
	BUILD_BUG_ON(sizeof(sigset_t) != sizeof(u64));

	return __get_user(dst->sig[0], (u64 __user *)&src->sig[0]);
}
#define unsafe_get_user_sigset(dst, src, label) do {			\
	sigset_t *__dst = dst;						\
	const sigset_t __user *__src = src;				\
	int i;								\
									\
	for (i = 0; i < _NSIG_WORDS; i++)				\
		unsafe_get_user(__dst->sig[i], &__src->sig[i], label);	\
} while (0)

#ifdef CONFIG_VSX
extern unsigned long copy_vsx_to_user(void __user *to,
				      struct task_struct *task);
extern unsigned long copy_ckvsx_to_user(void __user *to,
					       struct task_struct *task);
extern unsigned long copy_vsx_from_user(struct task_struct *task,
					void __user *from);
extern unsigned long copy_ckvsx_from_user(struct task_struct *task,
						 void __user *from);
unsigned long copy_fpr_to_user(void __user *to, struct task_struct *task);
unsigned long copy_ckfpr_to_user(void __user *to, struct task_struct *task);
unsigned long copy_fpr_from_user(struct task_struct *task, void __user *from);
unsigned long copy_ckfpr_from_user(struct task_struct *task, void __user *from);

#define unsafe_copy_fpr_to_user(to, task, label)	do {		\
	struct task_struct *__t = task;					\
	u64 __user *buf = (u64 __user *)to;				\
	int i;								\
									\
	for (i = 0; i < ELF_NFPREG - 1 ; i++)				\
		unsafe_put_user(__t->thread.TS_FPR(i), &buf[i], label); \
	unsafe_put_user(__t->thread.fp_state.fpscr, &buf[i], label);	\
} while (0)

#define unsafe_copy_vsx_to_user(to, task, label)	do {		\
	struct task_struct *__t = task;					\
	u64 __user *buf = (u64 __user *)to;				\
	int i;								\
									\
	for (i = 0; i < ELF_NVSRHALFREG ; i++)				\
		unsafe_put_user(__t->thread.fp_state.fpr[i][TS_VSRLOWOFFSET], \
				&buf[i], label);\
} while (0)

#define unsafe_copy_fpr_from_user(task, from, label)	do {		\
	struct task_struct *__t = task;					\
	u64 __user *buf = (u64 __user *)from;				\
	int i;								\
									\
	for (i = 0; i < ELF_NFPREG - 1; i++)				\
		unsafe_get_user(__t->thread.TS_FPR(i), &buf[i], label); \
	unsafe_get_user(__t->thread.fp_state.fpscr, &buf[i], label);	\
} while (0)

#define unsafe_copy_vsx_from_user(task, from, label)	do {		\
	struct task_struct *__t = task;					\
	u64 __user *buf = (u64 __user *)from;				\
	int i;								\
									\
	for (i = 0; i < ELF_NVSRHALFREG ; i++)				\
		unsafe_get_user(__t->thread.fp_state.fpr[i][TS_VSRLOWOFFSET], \
				&buf[i], label);			\
} while (0)

#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
#define unsafe_copy_ckfpr_to_user(to, task, label)	do {		\
	struct task_struct *__t = task;					\
	u64 __user *buf = (u64 __user *)to;				\
	int i;								\
									\
	for (i = 0; i < ELF_NFPREG - 1 ; i++)				\
		unsafe_put_user(__t->thread.TS_CKFPR(i), &buf[i], label);\
	unsafe_put_user(__t->thread.ckfp_state.fpscr, &buf[i], label);	\
} while (0)

#define unsafe_copy_ckvsx_to_user(to, task, label)	do {		\
	struct task_struct *__t = task;					\
	u64 __user *buf = (u64 __user *)to;				\
	int i;								\
									\
	for (i = 0; i < ELF_NVSRHALFREG ; i++)				\
		unsafe_put_user(__t->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET], \
				&buf[i], label);\
} while (0)

#define unsafe_copy_ckfpr_from_user(task, from, label)	do {		\
	struct task_struct *__t = task;					\
	u64 __user *buf = (u64 __user *)from;				\
	int i;								\
									\
	for (i = 0; i < ELF_NFPREG - 1 ; i++)				\
		unsafe_get_user(__t->thread.TS_CKFPR(i), &buf[i], label);\
	unsafe_get_user(__t->thread.ckfp_state.fpscr, &buf[i], failed);	\
} while (0)

#define unsafe_copy_ckvsx_from_user(task, from, label)	do {		\
	struct task_struct *__t = task;					\
	u64 __user *buf = (u64 __user *)from;				\
	int i;								\
									\
	for (i = 0; i < ELF_NVSRHALFREG ; i++)				\
		unsafe_get_user(__t->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET], \
				&buf[i], label);			\
} while (0)
#endif
#elif defined(CONFIG_PPC_FPU_REGS)

#define unsafe_copy_fpr_to_user(to, task, label)		\
	unsafe_copy_to_user(to, (task)->thread.fp_state.fpr,	\
			    ELF_NFPREG * sizeof(double), label)

#define unsafe_copy_fpr_from_user(task, from, label)			\
	unsafe_copy_from_user((task)->thread.fp_state.fpr, from,	\
			    ELF_NFPREG * sizeof(double), label)

static inline unsigned long
copy_fpr_to_user(void __user *to, struct task_struct *task)
{
	return __copy_to_user(to, task->thread.fp_state.fpr,
			      ELF_NFPREG * sizeof(double));
}

static inline unsigned long
copy_fpr_from_user(struct task_struct *task, void __user *from)
{
	return __copy_from_user(task->thread.fp_state.fpr, from,
			      ELF_NFPREG * sizeof(double));
}

#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
#define unsafe_copy_ckfpr_to_user(to, task, label)		\
	unsafe_copy_to_user(to, (task)->thread.ckfp_state.fpr,	\
			    ELF_NFPREG * sizeof(double), label)

inline unsigned long copy_ckfpr_to_user(void __user *to, struct task_struct *task)
{
	return __copy_to_user(to, task->thread.ckfp_state.fpr,
			      ELF_NFPREG * sizeof(double));
}

static inline unsigned long
copy_ckfpr_from_user(struct task_struct *task, void __user *from)
{
	return __copy_from_user(task->thread.ckfp_state.fpr, from,
				ELF_NFPREG * sizeof(double));
}
#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
#else
#define unsafe_copy_fpr_to_user(to, task, label) do { if (0) goto label;} while (0)

#define unsafe_copy_fpr_from_user(task, from, label) do { if (0) goto label;} while (0)

static inline unsigned long
copy_fpr_to_user(void __user *to, struct task_struct *task)
{
	return 0;
}

static inline unsigned long
copy_fpr_from_user(struct task_struct *task, void __user *from)
{
	return 0;
}
#endif

#ifdef CONFIG_PPC64

extern int handle_rt_signal64(struct ksignal *ksig, sigset_t *set,
			      struct task_struct *tsk);

#else /* CONFIG_PPC64 */

extern long sys_rt_sigreturn(void);
extern long sys_sigreturn(void);

static inline int handle_rt_signal64(struct ksignal *ksig, sigset_t *set,
				     struct task_struct *tsk)
{
	return -EFAULT;
}

#endif /* !defined(CONFIG_PPC64) */

void signal_fault(struct task_struct *tsk, struct pt_regs *regs,
		  const char *where, void __user *ptr);

#endif  /* _POWERPC_ARCH_SIGNAL_H */