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[PATCH] sh: task_pt_regs()

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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>
This commit is contained in:
Al Viro 2006-01-12 01:05:44 -08:00 committed by Linus Torvalds
parent 26ecbdea4b
commit 3cf0f4ece9
3 changed files with 18 additions and 48 deletions
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42
arch/sh/kernel/process.c
View file

@ -191,13 +191,8 @@ void flush_thread(void)
{
#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 @@ int dump_task_regs(struct task_struct *tsk, elf_gregset_t *regs)
{
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 @@ dump_task_fpu (struct task_struct *tsk, elf_fpregset_t *fpu)
#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 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
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 @@ ubc_set_tracing(int asid, unsigned long pc)
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 task_struct *__switch_to(struct task_struct *prev, struct task_struct *ne
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];

14
arch/sh/kernel/ptrace.c
View file

@ -41,12 +41,7 @@ static inline int get_stack_long(struct task_struct *task, int offset)
{
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 @@ static inline int put_stack_long(struct task_struct *task, int offset,
{
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;

10
include/asm-sh/ptrace.h
View file

@ -91,6 +91,16 @@ struct pt_dspregs {
#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);