From: kemal <kmal@cock.li>
Support aarch64 to test "Syscall User Dispatch" feature with
sud_test selftest testcase.
On qemu-kvm machine, the sud_benchmark test results are as below:
# ./sud_benchmark
Calibrating test set to last ~5 seconds...
test iterations = 24500000
Avg syscall time 208ns.
Enabling syscall trapping.
Caught sys_1c2
trapped_call_count 1, native_call_count 0.
Avg syscall time 213ns.
Interception overhead: 2.5% (+5ns).
Reviewed-by: Yeoreum Yun <yeoreum.yun@arm.com>
Signed-off-by: kemal <kmal@cock.li>
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
---
tools/testing/selftests/syscall_user_dispatch/sud_benchmark.c | 2 +-
tools/testing/selftests/syscall_user_dispatch/sud_test.c | 4 ++++
2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/syscall_user_dispatch/sud_benchmark.c b/tools/testing/selftests/syscall_user_dispatch/sud_benchmark.c
index 073a03702ff5..6059abe75cb3 100644
--- a/tools/testing/selftests/syscall_user_dispatch/sud_benchmark.c
+++ b/tools/testing/selftests/syscall_user_dispatch/sud_benchmark.c
@@ -41,7 +41,7 @@
* out of the box, but don't enable them until they support syscall user
* dispatch.
*/
-#if defined(__x86_64__) || defined(__i386__)
+#if defined(__x86_64__) || defined(__i386__) || defined(__aarch64__)
#define TEST_BLOCKED_RETURN
#endif
diff --git a/tools/testing/selftests/syscall_user_dispatch/sud_test.c b/tools/testing/selftests/syscall_user_dispatch/sud_test.c
index b855c6000287..3ffea2f4a66d 100644
--- a/tools/testing/selftests/syscall_user_dispatch/sud_test.c
+++ b/tools/testing/selftests/syscall_user_dispatch/sud_test.c
@@ -192,6 +192,10 @@ static void handle_sigsys(int sig, siginfo_t *info, void *ucontext)
((ucontext_t *)ucontext)->uc_mcontext.__gregs[REG_A0] =
((ucontext_t *)ucontext)->uc_mcontext.__gregs[REG_A7];
#endif
+#ifdef __aarch64__
+ ((ucontext_t *)ucontext)->uc_mcontext.regs[0] = (unsigned int)
+ ((ucontext_t *)ucontext)->uc_mcontext.regs[8];
+#endif
}
int setup_sigsys_handler(void)
--
2.34.1