From: Al Viro <viro@ftp.linux.org.uk>
To: torvalds@osdl.org
Cc: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org
Subject: [PATCH 40/50] powerpc: task_stack_page()
Date: Tue, 03 Jan 2006 21:07:39 +0000 [thread overview]
Message-ID: <E1EttNb-0008Rk-5l@ZenIV.linux.org.uk> (raw)
References: <20060103210515.5135@ftp.linux.org.uk>
In-Reply-To: <20060103210515.5135@ftp.linux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
arch/powerpc/kernel/process.c | 10 ++++------
arch/ppc/kernel/process.c | 8 ++++----
2 files changed, 8 insertions(+), 10 deletions(-)
1cf48f33ad88078b946ddf907f87ec1f313432c7
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index bc03526..1f816f0 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -503,7 +503,7 @@ int copy_thread(int nr, unsigned long cl
{
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,
* 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)
diff --git a/arch/ppc/kernel/process.c b/arch/ppc/kernel/process.c
index c3555a8..a76b504 100644
--- a/arch/ppc/kernel/process.c
+++ b/arch/ppc/kernel/process.c
@@ -482,7 +482,7 @@ copy_thread(int nr, unsigned long clone_
{
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,
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;
--
0.99.9.GIT
reply other threads:[~2006-01-03 21:11 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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