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[PATCH] powerpc: task_stack_page()

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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 01:06:02 -08:00 committed by Linus Torvalds
parent b5e2fc1c62
commit 0cec6fd137
2 changed files with 8 additions and 10 deletions
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10
arch/powerpc/kernel/process.c
View File

@ -503,7 +503,7 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
{
struct pt_regs *childregs, *kregs;
extern void ret_from_fork(void);
unsigned long sp = (unsigned long)p->thread_info + THREAD_SIZE;
unsigned long sp = (unsigned long)task_stack_page(p) + THREAD_SIZE;
CHECK_FULL_REGS(regs);
/* Copy registers */
@ -588,10 +588,8 @@ void start_thread(struct pt_regs *regs, unsigned long start, unsigned long sp)
* set. Do it now.
*/
if (!current->thread.regs) {
unsigned long childregs = (unsigned long)current->thread_info +
THREAD_SIZE;
childregs -= sizeof(struct pt_regs);
current->thread.regs = (struct pt_regs *)childregs;
struct pt_regs *regs = task_stack_page(current) + THREAD_SIZE;
current->thread.regs = regs - 1;
}
memset(regs->gpr, 0, sizeof(regs->gpr));
@ -767,7 +765,7 @@ out:
static int validate_sp(unsigned long sp, struct task_struct *p,
unsigned long nbytes)
{
unsigned long stack_page = (unsigned long)p->thread_info;
unsigned long stack_page = (unsigned long)task_stack_page(p);
if (sp >= stack_page + sizeof(struct thread_struct)
&& sp <= stack_page + THREAD_SIZE - nbytes)

8
arch/ppc/kernel/process.c
View File

@ -482,7 +482,7 @@ copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
{
struct pt_regs *childregs, *kregs;
extern void ret_from_fork(void);
unsigned long sp = (unsigned long)p->thread_info + THREAD_SIZE;
unsigned long sp = (unsigned long)task_stack_page(p) + THREAD_SIZE;
unsigned long childframe;
CHECK_FULL_REGS(regs);
@ -702,8 +702,8 @@ void show_stack(struct task_struct *tsk, unsigned long *stack)
sp = tsk->thread.ksp;
}
prev_sp = (unsigned long) (tsk->thread_info + 1);
stack_top = (unsigned long) tsk->thread_info + THREAD_SIZE;
prev_sp = (unsigned long) end_of_stack(tsk);
stack_top = (unsigned long) task_stack_page(tsk) + THREAD_SIZE;
while (count < 16 && sp > prev_sp && sp < stack_top && (sp & 3) == 0) {
if (count == 0) {
printk("Call trace:");
@ -832,7 +832,7 @@ void __init ll_puts(const char *s)
unsigned long get_wchan(struct task_struct *p)
{
unsigned long ip, sp;
unsigned long stack_page = (unsigned long) p->thread_info;
unsigned long stack_page = (unsigned long) task_stack_page(p);
int count = 0;
if (!p || p == current || p->state == TASK_RUNNING)
return 0;