From 6c3559fc458e3ed171d7a8bf6a6d7eaea1e7b2e5 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Thu, 12 Jan 2006 01:05:52 -0800 Subject: [PATCH] m32r: task_pt_regs(), task_stack_page(), task_thread_info() Signed-off-by: Al Viro Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/m32r/kernel/ptrace.c | 25 ++++--------------------- 1 file changed, 4 insertions(+), 21 deletions(-) (limited to 'arch/m32r/kernel/ptrace.c') diff --git a/arch/m32r/kernel/ptrace.c b/arch/m32r/kernel/ptrace.c index 9b75caaf5cec..340a3bf59b88 100644 --- a/arch/m32r/kernel/ptrace.c +++ b/arch/m32r/kernel/ptrace.c @@ -34,23 +34,6 @@ #include #include -/* - * 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 - - sizeof(struct pt_regs)); -} - /* * This routine will get a word off of the process kernel stack. */ @@ -59,7 +42,7 @@ get_stack_long(struct task_struct *task, int offset) { unsigned long *stack; - stack = (unsigned long *)get_user_regs(task); + stack = (unsigned long *)task_pt_regs(task); return stack[offset]; } @@ -72,7 +55,7 @@ put_stack_long(struct task_struct *task, int offset, unsigned long data) { unsigned long *stack; - stack = (unsigned long *)get_user_regs(task); + stack = (unsigned long *)task_pt_regs(task); stack[offset] = data; return 0; @@ -208,7 +191,7 @@ 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; } @@ -223,7 +206,7 @@ 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); *regs = newregs; ret = 0; } -- cgit v1.2.3