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>
diff --git a/arch/parisc/kernel/syscall.S b/arch/parisc/kernel/syscall.S
index 59fc1a4..5698668 100644
--- a/arch/parisc/kernel/syscall.S
+++ b/arch/parisc/kernel/syscall.S
@@ -288,6 +288,7 @@
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 @@
#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 @@
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)