parisc: tracehook_report_syscall

This makes parisc use the standard tracehook_report_syscall_entry
and tracehook_report_syscall_exit hooks in <linux/tracehook.h>.

To do this, we need to access current->thread.regs, and to know
whether we're entering or exiting the syscall, so add this to
syscall_trace.

Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>

1 files changed, 3 insertions, 1 deletions

diff --git a/arch/parisc/kernel/syscall.S b/arch/parisc/kernel/syscall.S
index 59fc1a43ec3e..5698668166cd 100644
--- a/arch/parisc/kernel/syscall.S
+++ b/arch/parisc/kernel/syscall.S
@@ -288,6 +288,7 @@ tracesys:
         STREG   %r18,PT_GR18(%r2)
         /* Finished saving things for the debugger */
 
+        ldi     0,%r26                          /* syscall entry */
         ldil    L%syscall_trace,%r1
         ldil    L%tracesys_next,%r2
         be      R%syscall_trace(%sr7,%r1)
@@ -336,6 +337,7 @@ tracesys_exit:
 #ifdef CONFIG_64BIT
         ldo     -16(%r30),%r29                  /* Reference param save area */
 #endif
+        ldi     1,%r26                          /* syscall exit */
         bl      syscall_trace, %r2
         STREG   %r28,TASK_PT_GR28(%r1)          /* save return value now */
         ldo     -THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1      /* get task ptr */
@@ -358,7 +360,7 @@ tracesys_sigexit:
         ldo     -16(%r30),%r29                  /* Reference param save area */
 #endif
         bl      syscall_trace, %r2
-        nop
+        ldi     1,%r26                          /* syscall exit */
 
         ldil    L%syscall_exit_rfi,%r1
         be,n    R%syscall_exit_rfi(%sr7,%r1)