Pull ec into release branch

[pandora-kernel.git] / arch / ia64 / kernel / ptrace.c

diff --git a/arch/ia64/kernel/ptrace.c b/arch/ia64/kernel/ptrace.c
index aa705e4..00f8032 100644 (file)
--- a/arch/ia64/kernel/ptrace.c
+++ b/arch/ia64/kernel/ptrace.c
@@ -607,7 +607,7 @@ find_thread_for_addr (struct task_struct *child, unsigned long addr)
         */
        list_for_each_safe(this, next, &current->children) {
                p = list_entry(this, struct task_struct, sibling);
-               if (p->mm != mm)
+               if (p->tgid != child->tgid)
                        continue;
                if (thread_matches(p, addr)) {
                        child = p;
@@ -1405,6 +1405,7 @@ ptrace_disable (struct task_struct *child)
        struct ia64_psr *child_psr = ia64_psr(task_pt_regs(child));
 
        /* make sure the single step/taken-branch trap bits are not set: */
+       clear_tsk_thread_flag(child, TIF_SINGLESTEP);
        child_psr->ss = 0;
        child_psr->tb = 0;
 }
@@ -1525,6 +1526,7 @@ sys_ptrace (long request, pid_t pid, unsigned long addr, unsigned long data)
                 * Make sure the single step/taken-branch trap bits
                 * are not set:
                 */
+               clear_tsk_thread_flag(child, TIF_SINGLESTEP);
                ia64_psr(pt)->ss = 0;
                ia64_psr(pt)->tb = 0;
 
@@ -1556,6 +1558,7 @@ sys_ptrace (long request, pid_t pid, unsigned long addr, unsigned long data)
                        goto out_tsk;
 
                clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
+               set_tsk_thread_flag(child, TIF_SINGLESTEP);
                if (request == PTRACE_SINGLESTEP) {
                        ia64_psr(pt)->ss = 1;
                } else {
@@ -1570,6 +1573,7 @@ sys_ptrace (long request, pid_t pid, unsigned long addr, unsigned long data)
 
              case PTRACE_DETACH:
                /* detach a process that was attached. */
+               clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
                ret = ptrace_detach(child, data);
                goto out_tsk;
 
@@ -1595,13 +1599,9 @@ sys_ptrace (long request, pid_t pid, unsigned long addr, unsigned long data)
 }
 
 
-void
+static void
 syscall_trace (void)
 {
-       if (!test_thread_flag(TIF_SYSCALL_TRACE))
-               return;
-       if (!(current->ptrace & PT_PTRACED))
-               return;
        /*
         * The 0x80 provides a way for the tracing parent to
         * distinguish between a syscall stop and SIGTRAP delivery.
@@ -1664,7 +1664,8 @@ syscall_trace_leave (long arg0, long arg1, long arg2, long arg3,
                audit_syscall_exit(success, result);
        }
 
-       if (test_thread_flag(TIF_SYSCALL_TRACE)
+       if ((test_thread_flag(TIF_SYSCALL_TRACE)
+           || test_thread_flag(TIF_SINGLESTEP))
            && (current->ptrace & PT_PTRACED))
                syscall_trace();
 }