Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff

[linux-2.6.git] / arch / sh / kernel / ptrace.c

diff --git a/arch/sh/kernel/ptrace.c b/arch/sh/kernel/ptrace.c
index a55dda6..3887b4f 100644 (file)
--- a/arch/sh/kernel/ptrace.c
+++ b/arch/sh/kernel/ptrace.c
@@ -41,12 +41,7 @@ static inline int get_stack_long(struct task_struct *task, int offset)
 {
        unsigned char *stack;
 
-       stack = (unsigned char *)
-               task->thread_info + THREAD_SIZE - sizeof(struct pt_regs)
-#ifdef CONFIG_SH_DSP
-               - sizeof(struct pt_dspregs)
-#endif
-               - sizeof(unsigned long);
+       stack = (unsigned char *)task_pt_regs(task);
        stack += offset;
        return (*((int *)stack));
 }
@@ -59,12 +54,7 @@ static inline int put_stack_long(struct task_struct *task, int offset,
 {
        unsigned char *stack;
 
-       stack = (unsigned char *)
-               task->thread_info + THREAD_SIZE - sizeof(struct pt_regs)
-#ifdef CONFIG_SH_DSP
-               - sizeof(struct pt_dspregs)
-#endif
-               - sizeof(unsigned long);
+       stack = (unsigned char *)task_pt_regs(task);
        stack += offset;
        *(unsigned long *) stack = data;
        return 0;
@@ -80,50 +70,11 @@ void ptrace_disable(struct task_struct *child)
        /* nothing to do.. */
 }
 
-asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
+long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 {
-       struct task_struct *child;
        struct user * dummy = NULL;
        int ret;
 
-       lock_kernel();
-       ret = -EPERM;
-       if (request == PTRACE_TRACEME) {
-               /* are we already being traced? */
-               if (current->ptrace & PT_PTRACED)
-                       goto out;
-               ret = security_ptrace(current->parent, current);
-               if (ret)
-                       goto out;
-               /* set the ptrace bit in the process flags. */
-               current->ptrace |= PT_PTRACED;
-               ret = 0;
-               goto out;
-       }
-       ret = -ESRCH;
-       read_lock(&tasklist_lock);
-       child = find_task_by_pid(pid);
-       if (child)
-               get_task_struct(child);
-       read_unlock(&tasklist_lock);
-       if (!child)
-               goto out;
-       if (!vx_check(vx_task_xid(child), VX_WATCH|VX_IDENT))
-               goto out_tsk;
-
-       ret = -EPERM;
-       if (pid == 1)           /* you may not mess with init */
-               goto out_tsk;
-
-       if (request == PTRACE_ATTACH) {
-               ret = ptrace_attach(child);
-               goto out_tsk;
-       }
-
-       ret = ptrace_check_attach(child, request == PTRACE_KILL);
-       if (ret < 0)
-               goto out_tsk;
-
        switch (request) {
        /* when I and D space are separate, these will need to be fixed. */
        case PTRACE_PEEKTEXT: /* read word at location addr. */ 
@@ -291,10 +242,7 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
                ret = ptrace_request(child, request, addr, data);
                break;
        }
-out_tsk:
-       put_task_struct(child);
-out:
-       unlock_kernel();
+
        return ret;
 }