1 files changed, 12 insertions, 48 deletions

diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c
index 08f899fb76a6..3f562a7c0a99 100644
--- a/arch/arm/kernel/ptrace.c
+++ b/arch/arm/kernel/ptrace.c
@@ -452,12 +452,23 @@ void ptrace_cancel_bpt(struct task_struct *child)
                 clear_breakpoint(child, &child->thread.debug.bp[i]);
 }
 
+void user_disable_single_step(struct task_struct *task)
+{
+        task->ptrace &= ~PT_SINGLESTEP;
+        ptrace_cancel_bpt(task);
+}
+
+void user_enable_single_step(struct task_struct *task)
+{
+        task->ptrace |= PT_SINGLESTEP;
+}
+
 /*
  * Called by kernel/ptrace.c when detaching..
  */
 void ptrace_disable(struct task_struct *child)
 {
-        single_step_disable(child);
+        user_disable_single_step(child);
 }
 
 /*
@@ -753,53 +764,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                         ret = ptrace_write_user(child, addr, data);
                         break;
 
-                /*
-                 * continue/restart and stop at next (return from) syscall
-                 */
-                case PTRACE_SYSCALL:
-                case PTRACE_CONT:
-                        ret = -EIO;
-                        if (!valid_signal(data))
-                                break;
-                        if (request == PTRACE_SYSCALL)
-                                set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-                        else
-                                clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-                        child->exit_code = data;
-                        single_step_disable(child);
-                        wake_up_process(child);
-                        ret = 0;
-                        break;
-
-                /*
-                 * make the child exit.  Best I can do is send it a sigkill.
-                 * perhaps it should be put in the status that it wants to
-                 * exit.
-                 */
-                case PTRACE_KILL:
-                        single_step_disable(child);
-                        if (child->exit_state != EXIT_ZOMBIE) {
-                                child->exit_code = SIGKILL;
-                                wake_up_process(child);
-                        }
-                        ret = 0;
-                        break;
-
-                /*
-                 * execute single instruction.
-                 */
-                case PTRACE_SINGLESTEP:
-                        ret = -EIO;
-                        if (!valid_signal(data))
-                                break;
-                        single_step_enable(child);
-                        clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-                        child->exit_code = data;
-                        /* give it a chance to run. */
-                        wake_up_process(child);
-                        ret = 0;
-                        break;
-
                 case PTRACE_GETREGS:
                         ret = ptrace_getregs(child, (void __user *)data);
                         break;