parisc: improve ptrace support for gdb single-step

[~andy/linux] / arch / parisc / kernel / entry.S

diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
index bfb44247d7a7b023d1953d5983a110fc69966995..eb7850b46c255e98cc9c97ef873766f793398061 100644 (file)
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -1865,7 +1865,7 @@ syscall_restore:
 
        /* Are we being ptraced? */
        ldw     TASK_FLAGS(%r1),%r19
-       ldi     (_TIF_SINGLESTEP|_TIF_BLOCKSTEP),%r2
+       ldi     _TIF_SYSCALL_TRACE_MASK,%r2
        and,COND(=)     %r19,%r2,%r0
        b,n     syscall_restore_rfi
 
@@ -1978,15 +1978,23 @@ syscall_restore_rfi:
        /* sr2 should be set to zero for userspace syscalls */
        STREG   %r0,TASK_PT_SR2(%r1)
 
-pt_regs_ok:
        LDREG   TASK_PT_GR31(%r1),%r2
-       depi    3,31,2,%r2                         /* ensure return to user mode. */
-       STREG   %r2,TASK_PT_IAOQ0(%r1)
+       depi    3,31,2,%r2                 /* ensure return to user mode. */
+       STREG   %r2,TASK_PT_IAOQ0(%r1)
        ldo     4(%r2),%r2
        STREG   %r2,TASK_PT_IAOQ1(%r1)
+       b       intr_restore
        copy    %r25,%r16
+
+pt_regs_ok:
+       LDREG   TASK_PT_IAOQ0(%r1),%r2
+       depi    3,31,2,%r2                 /* ensure return to user mode. */
+       STREG   %r2,TASK_PT_IAOQ0(%r1)
+       LDREG   TASK_PT_IAOQ1(%r1),%r2
+       depi    3,31,2,%r2
+       STREG   %r2,TASK_PT_IAOQ1(%r1)
        b       intr_restore
-       nop
+       copy    %r25,%r16
 
        .import schedule,code
 syscall_do_resched: