Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
[PATCH] powerpc: task_stack_page()
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>
authored by Al Viro and committed by Linus Torvalds 0cec6fd1 b5e2fc1c
+4
-6
arch/powerpc/kernel/process.c
+4
-6
arch/powerpc/kernel/process.c
···
503
{
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struct pt_regs *childregs, *kregs;
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extern void ret_from_fork(void);
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-
unsigned long sp = (unsigned long)p->thread_info + THREAD_SIZE;
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CHECK_FULL_REGS(regs);
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/* Copy registers */
···
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* set. Do it now.
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*/
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if (!current->thread.regs) {
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-
unsigned long childregs = (unsigned long)current->thread_info +
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-
THREAD_SIZE;
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-
childregs -= sizeof(struct pt_regs);
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-
current->thread.regs = (struct pt_regs *)childregs;
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}
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memset(regs->gpr, 0, sizeof(regs->gpr));
···
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static int validate_sp(unsigned long sp, struct task_struct *p,
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unsigned long nbytes)
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{
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-
unsigned long stack_page = (unsigned long)p->thread_info;
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if (sp >= stack_page + sizeof(struct thread_struct)
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&& sp <= stack_page + THREAD_SIZE - nbytes)
···
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{
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struct pt_regs *childregs, *kregs;
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extern void ret_from_fork(void);
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+
unsigned long sp = (unsigned long)task_stack_page(p) + THREAD_SIZE;
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CHECK_FULL_REGS(regs);
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/* Copy registers */
···
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* set. Do it now.
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*/
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if (!current->thread.regs) {
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+
struct pt_regs *regs = task_stack_page(current) + THREAD_SIZE;
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+
current->thread.regs = regs - 1;
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}
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memset(regs->gpr, 0, sizeof(regs->gpr));
···
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static int validate_sp(unsigned long sp, struct task_struct *p,
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unsigned long nbytes)
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{
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+
unsigned long stack_page = (unsigned long)task_stack_page(p);
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if (sp >= stack_page + sizeof(struct thread_struct)
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&& sp <= stack_page + THREAD_SIZE - nbytes)
+4
-4
arch/ppc/kernel/process.c
+4
-4
arch/ppc/kernel/process.c
···
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{
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struct pt_regs *childregs, *kregs;
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extern void ret_from_fork(void);
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-
unsigned long sp = (unsigned long)p->thread_info + THREAD_SIZE;
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unsigned long childframe;
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CHECK_FULL_REGS(regs);
···
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sp = tsk->thread.ksp;
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}
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-
prev_sp = (unsigned long) (tsk->thread_info + 1);
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-
stack_top = (unsigned long) tsk->thread_info + THREAD_SIZE;
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while (count < 16 && sp > prev_sp && sp < stack_top && (sp & 3) == 0) {
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if (count == 0) {
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printk("Call trace:");
···
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unsigned long get_wchan(struct task_struct *p)
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{
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unsigned long ip, sp;
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-
unsigned long stack_page = (unsigned long) p->thread_info;
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int count = 0;
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if (!p || p == current || p->state == TASK_RUNNING)
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return 0;
···
482
{
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struct pt_regs *childregs, *kregs;
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extern void ret_from_fork(void);
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+
unsigned long sp = (unsigned long)task_stack_page(p) + THREAD_SIZE;
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unsigned long childframe;
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CHECK_FULL_REGS(regs);
···
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sp = tsk->thread.ksp;
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}
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+
prev_sp = (unsigned long) end_of_stack(tsk);
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+
stack_top = (unsigned long) task_stack_page(tsk) + THREAD_SIZE;
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while (count < 16 && sp > prev_sp && sp < stack_top && (sp & 3) == 0) {
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if (count == 0) {
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printk("Call trace:");
···
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unsigned long get_wchan(struct task_struct *p)
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{
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unsigned long ip, sp;
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+
unsigned long stack_page = (unsigned long) task_stack_page(p);
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int count = 0;
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if (!p || p == current || p->state == TASK_RUNNING)
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return 0;