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[PATCH] aarch64: Add setjmp and longjmp SystemTap probes
- From: Will Newton <will dot newton at linaro dot org>
- To: libc-alpha at sourceware dot org
- Date: Tue, 8 Apr 2014 14:15:56 +0100
- Subject: [PATCH] aarch64: Add setjmp and longjmp SystemTap probes
- Authentication-results: sourceware.org; auth=none
From: Venkataramanan Kumar <venkataramanan.kumar@linaro.org>
Add setjmp, longjmp and longjmp_target Systemtap probes.
ChangeLog:
2014-04-08 Will Newton <will.newton@linaro.org>
Venkataramanan Kumar <venkataramanan.kumar@linaro.org>
* sysdeps/aarch64/__longjmp.S: Include stap-probe.h.
(__longjmp): Add longjmp and longjmp_target SystemTap
probes.
* sysdeps/aarch64/setjmp.S: Include stap-probe.h.
(__sigsetjmp): Add setjmp SystemTap probe.
---
sysdeps/aarch64/__longjmp.S | 10 ++++++++++
sysdeps/aarch64/setjmp.S | 5 +++++
2 files changed, 15 insertions(+)
diff --git a/sysdeps/aarch64/__longjmp.S b/sysdeps/aarch64/__longjmp.S
index 2d38bbf..1bb7be36 100644
--- a/sysdeps/aarch64/__longjmp.S
+++ b/sysdeps/aarch64/__longjmp.S
@@ -18,6 +18,7 @@
#include <sysdep.h>
#include <jmpbuf-offsets.h>
+#include <stap-probe.h>
/* __longjmp(jmpbuf, val) */
@@ -56,6 +57,10 @@ ENTRY (__longjmp)
#else
ldp x29, x30, [x0, #JB_X29<<3]
#endif
+ /* longjmp probe takes 3 arguments, address of jump buffer as
+ first argument (8@x0), return value as second argument (-4@x1),
+ and target address (8@x30), respectively. */
+ LIBC_PROBE (longjmp, 3, 8@x0, -4@x1, 8@x30)
ldp d8, d9, [x0, #JB_D8<<3]
ldp d10, d11, [x0, #JB_D10<<3]
ldp d12, d13, [x0, #JB_D12<<3]
@@ -98,6 +103,11 @@ ENTRY (__longjmp)
ldr x5, [x0, #JB_SP<<3]
#endif
mov sp, x5
+
+ /* longjmp_target probe takes 3 arguments, address of jump buffer
+ as first argument (8@x0), return value as second argument (-4@x1),
+ and target address (8@x30), respectively. */
+ LIBC_PROBE (longjmp_target, 3, 8@x0, -4@x1, 8@x30)
cmp x1, #0
mov x0, #1
csel x0, x1, x0, ne
diff --git a/sysdeps/aarch64/setjmp.S b/sysdeps/aarch64/setjmp.S
index 5822abd..fd39319 100644
--- a/sysdeps/aarch64/setjmp.S
+++ b/sysdeps/aarch64/setjmp.S
@@ -18,6 +18,7 @@
#include <sysdep.h>
#include <jmpbuf-offsets.h>
+#include <stap-probe.h>
/* Keep traditional entry points in with sigsetjmp(). */
ENTRY (setjmp)
@@ -46,6 +47,10 @@ ENTRY (__sigsetjmp)
#else
stp x29, x30, [x0, #JB_X29<<3]
#endif
+ /* setjmp probe takes 3 arguments, address of jump buffer
+ first argument (8@x0), return value second argument (-4@x1),
+ and target address (8@x30), respectively. */
+ LIBC_PROBE (setjmp, 3, 8@x0, -4@x1, 8@x30)
stp d8, d9, [x0, #JB_D8<<3]
stp d10, d11, [x0, #JB_D10<<3]
stp d12, d13, [x0, #JB_D12<<3]
--
1.8.1.4