commit b2a0d36fde90fa9dd20b7dde21dbcff09b130b38
author Russell King <rmk@dyn-67.arm.linux.org.uk> Sun Mar 04 09:50:28 2007 +0000
committer Russell King <rmk+kernel@arm.linux.org.uk> Sat Apr 21 20:34:58 2007 +0100
tree 354fe85244f011e17e1c96243f5f7925ba16b6b6
parent 0f0a00beb80624a446ba7c0152cd171008eeab2e

[ARM] ptrace: clean up single stepping support

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/kernel/ptrace.c

diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c
index 9254ba2..e594b84 100644
--- a/arch/arm/kernel/ptrace.c
+++ b/arch/arm/kernel/ptrace.c
@@ -457,13 +457,10 @@
 
 /*
  * Called by kernel/ptrace.c when detaching..
- *
- * Make sure the single step bit is not set.
  */
 void ptrace_disable(struct task_struct *child)
 {
-	child->ptrace &= ~PT_SINGLESTEP;
-	ptrace_cancel_bpt(child);
+	single_step_disable(child);
 }
 
 /*
@@ -712,9 +709,7 @@
 			else
 				clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
 			child->exit_code = data;
-			/* make sure single-step breakpoint is gone. */
-			child->ptrace &= ~PT_SINGLESTEP;
-			ptrace_cancel_bpt(child);
+			single_step_disable(child);
 			wake_up_process(child);
 			ret = 0;
 			break;
@@ -725,9 +720,7 @@
 		 * exit.
 		 */
 		case PTRACE_KILL:
-			/* make sure single-step breakpoint is gone. */
-			child->ptrace &= ~PT_SINGLESTEP;
-			ptrace_cancel_bpt(child);
+			single_step_disable(child);
 			if (child->exit_state != EXIT_ZOMBIE) {
 				child->exit_code = SIGKILL;
 				wake_up_process(child);
@@ -742,7 +735,7 @@
 			ret = -EIO;
 			if (!valid_signal(data))
 				break;
-			child->ptrace |= PT_SINGLESTEP;
+			single_step_enable(child);
 			clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
 			child->exit_code = data;
 			/* give it a chance to run. */