X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=kernel%2Fptrace.c;h=a73ebd3b9d4ca5019522fcf80c47eac8d5d7fa0c;hb=4e6045f134784f4b158b3c0f7a282b04bd816887;hp=82a558b655dabb9dc7990aedc804b9b04d8f1525;hpb=dcb76f88683618ed6ef0df66643dba1285881ee5;p=powerpc.git

diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 82a558b655..a73ebd3b9d 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -233,6 +233,7 @@ int ptrace_detach(struct task_struct *child, unsigned int data)
 
 	/* Architecture-specific hardware disable .. */
 	ptrace_disable(child);
+	clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
 
 	write_lock_irq(&tasklist_lock);
 	/* protect against de_thread()->release_task() */
@@ -385,6 +386,9 @@ int ptrace_request(struct task_struct *child, long request,
 	case PTRACE_SETSIGINFO:
 		ret = ptrace_setsiginfo(child, (siginfo_t __user *) data);
 		break;
+	case PTRACE_DETACH:	 /* detach a process that was attached. */
+		ret = ptrace_detach(child, data);
+		break;
 	default:
 		break;
 	}
@@ -449,6 +453,10 @@ struct task_struct *ptrace_get_task_struct(pid_t pid)
 	return child;
 }
 
+#ifndef arch_ptrace_attach
+#define arch_ptrace_attach(child)	do { } while (0)
+#endif
+
 #ifndef __ARCH_SYS_PTRACE
 asmlinkage long sys_ptrace(long request, long pid, long addr, long data)
 {
@@ -472,6 +480,12 @@ asmlinkage long sys_ptrace(long request, long pid, long addr, long data)
 
 	if (request == PTRACE_ATTACH) {
 		ret = ptrace_attach(child);
+		/*
+		 * Some architectures need to do book-keeping after
+		 * a ptrace attach.
+		 */
+		if (!ret)
+			arch_ptrace_attach(child);
 		goto out_put_task_struct;
 	}