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-rw-r--r--arch/arm/kernel/ptrace.c27
1 files changed, 5 insertions, 22 deletions
diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c
index f003062..e591f72b 100644
--- a/arch/arm/kernel/ptrace.c
+++ b/arch/arm/kernel/ptrace.c
@@ -55,23 +55,6 @@
#endif
/*
- * Get the address of the live pt_regs for the specified task.
- * These are saved onto the top kernel stack when the process
- * is not running.
- *
- * Note: if a user thread is execve'd from kernel space, the
- * kernel stack will not be empty on entry to the kernel, so
- * ptracing these tasks will fail.
- */
-static inline struct pt_regs *
-get_user_regs(struct task_struct *task)
-{
- return (struct pt_regs *)
- ((unsigned long)task->thread_info + THREAD_SIZE -
- 8 - sizeof(struct pt_regs));
-}
-
-/*
* this routine will get a word off of the processes privileged stack.
* the offset is how far from the base addr as stored in the THREAD.
* this routine assumes that all the privileged stacks are in our
@@ -79,7 +62,7 @@ get_user_regs(struct task_struct *task)
*/
static inline long get_user_reg(struct task_struct *task, int offset)
{
- return get_user_regs(task)->uregs[offset];
+ return task_pt_regs(task)->uregs[offset];
}
/*
@@ -91,7 +74,7 @@ static inline long get_user_reg(struct task_struct *task, int offset)
static inline int
put_user_reg(struct task_struct *task, int offset, long data)
{
- struct pt_regs newregs, *regs = get_user_regs(task);
+ struct pt_regs newregs, *regs = task_pt_regs(task);
int ret = -EINVAL;
newregs = *regs;
@@ -421,7 +404,7 @@ void ptrace_set_bpt(struct task_struct *child)
u32 insn;
int res;
- regs = get_user_regs(child);
+ regs = task_pt_regs(child);
pc = instruction_pointer(regs);
if (thumb_mode(regs)) {
@@ -572,7 +555,7 @@ static int ptrace_write_user(struct task_struct *tsk, unsigned long off,
*/
static int ptrace_getregs(struct task_struct *tsk, void __user *uregs)
{
- struct pt_regs *regs = get_user_regs(tsk);
+ struct pt_regs *regs = task_pt_regs(tsk);
return copy_to_user(uregs, regs, sizeof(struct pt_regs)) ? -EFAULT : 0;
}
@@ -587,7 +570,7 @@ static int ptrace_setregs(struct task_struct *tsk, void __user *uregs)
ret = -EFAULT;
if (copy_from_user(&newregs, uregs, sizeof(struct pt_regs)) == 0) {
- struct pt_regs *regs = get_user_regs(tsk);
+ struct pt_regs *regs = task_pt_regs(tsk);
ret = -EINVAL;
if (valid_user_regs(&newregs)) {
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