arch/powerpc/kernel/signal.h

Source file repositories/reference/linux-study-clean/arch/powerpc/kernel/signal.h

File Facts

System
Linux kernel
Corpus path
arch/powerpc/kernel/signal.h
Extension
.h
Size
6639 bytes
Lines
208
Domain
Architecture Layer
Bucket
arch/powerpc
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#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);	\

Annotation

Implementation Notes