From ce845e0a25d77c8cf0fae539d4596b83e65e3e70 Mon Sep 17 00:00:00 2001
From: Steve Muckle <smuckle@google.com>
Date: Tue, 24 Oct 2017 14:41:07 -0700
Subject: [PATCH] seccomp: detect compat mode in ARM64
Compat mode on ARM64 reports syscall numbering differently.
Test: run vts-kernel -m VtsKernelLinuxKselftestStaging
Bug: 33027081
Change-Id: Ifc02bb48573b4a40f1857b41a7735a6e3d7a06e8
Signed-off-by: Steve Muckle <smuckle@google.com>
---
tools/testing/selftests/seccomp/seccomp_bpf.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/seccomp/seccomp_bpf.c b/tools/testing/selftests/seccomp/seccomp_bpf.c
index 2c81f4b9965d..1975e7d42e37 100644
--- a/tools/testing/selftests/seccomp/seccomp_bpf.c
+++ b/tools/testing/selftests/seccomp/seccomp_bpf.c
@@ -2295,6 +2295,7 @@ TEST(syscall_restart)
};
#if defined(__arm__)
struct utsname utsbuf;
+ int arm_version;
#endif
ASSERT_EQ(0, pipe(pipefd));
@@ -2404,12 +2405,12 @@ TEST(syscall_restart)
ret = get_syscall(_metadata, child_pid);
#if defined(__arm__)
/*
- * FIXME:
* - native ARM registers do NOT expose true syscall.
* - compat ARM registers on ARM64 DO expose true syscall.
*/
ASSERT_EQ(0, uname(&utsbuf));
- if (strncmp(utsbuf.machine, "arm", 3) == 0) {
+ if (sscanf(utsbuf.machine, "armv%d", &arm_version) == 1 &&
+ arm_version < 8) {
EXPECT_EQ(__NR_nanosleep, ret);
} else
#endif
--
2.16.0.rc1.238.g530d649a79-goog