[PATCH] sh: task_pt_regs()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/sh/kernel/process.c b/arch/sh/kernel/process.c
index 8a2bea3..8c0060c 100644
--- a/arch/sh/kernel/process.c
+++ b/arch/sh/kernel/process.c
@@ -191,13 +191,8 @@
{
#if defined(CONFIG_SH_FPU)
struct task_struct *tsk = current;
- struct pt_regs *regs = (struct pt_regs *)
- ((unsigned long)tsk->thread_info
- + THREAD_SIZE - sizeof(struct pt_regs)
- - sizeof(unsigned long));
-
/* Forget lazy FPU state */
- clear_fpu(tsk, regs);
+ clear_fpu(tsk, task_pt_regs(tsk));
clear_used_math();
#endif
}
@@ -232,13 +227,7 @@
{
struct pt_regs ptregs;
- ptregs = *(struct pt_regs *)
- ((unsigned long)tsk->thread_info + THREAD_SIZE
- - sizeof(struct pt_regs)
-#ifdef CONFIG_SH_DSP
- - sizeof(struct pt_dspregs)
-#endif
- - sizeof(unsigned long));
+ ptregs = *task_pt_regs(tsk);
elf_core_copy_regs(regs, &ptregs);
return 1;
@@ -252,11 +241,7 @@
#if defined(CONFIG_SH_FPU)
fpvalid = !!tsk_used_math(tsk);
if (fpvalid) {
- struct pt_regs *regs = (struct pt_regs *)
- ((unsigned long)tsk->thread_info
- + THREAD_SIZE - sizeof(struct pt_regs)
- - sizeof(unsigned long));
- unlazy_fpu(tsk, regs);
+ unlazy_fpu(tsk, task_pt_regs(tsk));
memcpy(fpu, &tsk->thread.fpu.hard, sizeof(*fpu));
}
#endif
@@ -279,12 +264,7 @@
copy_to_stopped_child_used_math(p);
#endif
- childregs = ((struct pt_regs *)
- (THREAD_SIZE + (unsigned long) p->thread_info)
-#ifdef CONFIG_SH_DSP
- - sizeof(struct pt_dspregs)
-#endif
- - sizeof(unsigned long)) - 1;
+ childregs = task_pt_regs(p);
*childregs = *regs;
if (user_mode(regs)) {
@@ -333,11 +313,7 @@
struct task_struct *__switch_to(struct task_struct *prev, struct task_struct *next)
{
#if defined(CONFIG_SH_FPU)
- struct pt_regs *regs = (struct pt_regs *)
- ((unsigned long)prev->thread_info
- + THREAD_SIZE - sizeof(struct pt_regs)
- - sizeof(unsigned long));
- unlazy_fpu(prev, regs);
+ unlazy_fpu(prev, task_pt_regs(prev));
#endif
#ifdef CONFIG_PREEMPT
@@ -346,13 +322,7 @@
struct pt_regs *regs;
local_irq_save(flags);
- regs = (struct pt_regs *)
- ((unsigned long)prev->thread_info
- + THREAD_SIZE - sizeof(struct pt_regs)
-#ifdef CONFIG_SH_DSP
- - sizeof(struct pt_dspregs)
-#endif
- - sizeof(unsigned long));
+ regs = task_pt_regs(prev);
if (user_mode(regs) && regs->regs[15] >= 0xc0000000) {
int offset = (int)regs->regs[15];
diff --git a/arch/sh/kernel/ptrace.c b/arch/sh/kernel/ptrace.c
index 1a8be06..3887b4f 100644
--- a/arch/sh/kernel/ptrace.c
+++ b/arch/sh/kernel/ptrace.c
@@ -41,12 +41,7 @@
{
unsigned char *stack;
- stack = (unsigned char *)
- task->thread_info + THREAD_SIZE - sizeof(struct pt_regs)
-#ifdef CONFIG_SH_DSP
- - sizeof(struct pt_dspregs)
-#endif
- - sizeof(unsigned long);
+ stack = (unsigned char *)task_pt_regs(task);
stack += offset;
return (*((int *)stack));
}
@@ -59,12 +54,7 @@
{
unsigned char *stack;
- stack = (unsigned char *)
- task->thread_info + THREAD_SIZE - sizeof(struct pt_regs)
-#ifdef CONFIG_SH_DSP
- - sizeof(struct pt_dspregs)
-#endif
- - sizeof(unsigned long);
+ stack = (unsigned char *)task_pt_regs(task);
stack += offset;
*(unsigned long *) stack = data;
return 0;
diff --git a/include/asm-sh/ptrace.h b/include/asm-sh/ptrace.h
index 0f75e16..85aa0f4 100644
--- a/include/asm-sh/ptrace.h
+++ b/include/asm-sh/ptrace.h
@@ -91,6 +91,16 @@
#define instruction_pointer(regs) ((regs)->pc)
extern void show_regs(struct pt_regs *);
+#ifdef CONFIG_SH_DSP
+#define task_pt_regs(task) \
+ ((struct pt_regs *) ((unsigned long)(task)->thread_info + THREAD_SIZE \
+ - sizeof(struct pt_dspregs) - sizeof(unsigned long)) - 1)
+#else
+#define task_pt_regs(task) \
+ ((struct pt_regs *) ((unsigned long)(task)->thread_info + THREAD_SIZE \
+ - sizeof(unsigned long)) - 1)
+#endif
+
static inline unsigned long profile_pc(struct pt_regs *regs)
{
unsigned long pc = instruction_pointer(regs);