[PULL,v2,9/9] tests/tcg/x86_64: add vsyscall smoke test

Commit Message

Cornelia Huck May 20, 2021, 5:05 p.m. UTC

From: Ilya Leoshkevich <[e-mail]>

Having a small test will prevent trivial regressions in the future.

Signed-off-by: Ilya Leoshkevich <[e-mail]>
Message-Id: <[e-mail]>
Reviewed-by: Richard Henderson <[e-mail]>
Signed-off-by: Cornelia Huck <[e-mail]>
---
 tests/tcg/x86_64/Makefile.target |  6 +++++-
 tests/tcg/x86_64/vsyscall.c      | 12 ++++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)
 create mode 100644 tests/tcg/x86_64/vsyscall.c

Patch

diff --git a/tests/tcg/x86_64/Makefile.target b/tests/tcg/x86_64/Makefile.target
index 20bf96202ad2..2151ea6302ec 100644
--- a/tests/tcg/x86_64/Makefile.target
+++ b/tests/tcg/x86_64/Makefile.target
@@ -3,14 +3,18 @@ 
 # x86_64 tests - included from tests/tcg/Makefile.target
 #
 # Currently we only build test-x86_64 and test-i386-ssse3 from
-# $(SRC)/tests/tcg/i386/
+# $(SRC_PATH)/tests/tcg/i386/
 #
 
 include $(SRC_PATH)/tests/tcg/i386/Makefile.target
 
+X86_64_TESTS += vsyscall
 TESTS=$(MULTIARCH_TESTS) $(X86_64_TESTS) test-x86_64
 QEMU_OPTS += -cpu max
 
 test-x86_64: LDFLAGS+=-lm -lc
 test-x86_64: test-i386.c test-i386.h test-i386-shift.h test-i386-muldiv.h
 	$(CC) $(CFLAGS) $< -o $@ $(LDFLAGS)
+
+vsyscall: $(SRC_PATH)/tests/tcg/x86_64/vsyscall.c
+	$(CC) $(CFLAGS) $< -o $@ $(LDFLAGS)
diff --git a/tests/tcg/x86_64/vsyscall.c b/tests/tcg/x86_64/vsyscall.c
new file mode 100644
index 000000000000..786b047053aa
--- /dev/null
+++ b/tests/tcg/x86_64/vsyscall.c
@@ -0,0 +1,12 @@ 
+#include <stdio.h>
+#include <time.h>
+
+#define VSYSCALL_PAGE 0xffffffffff600000
+#define TIME_OFFSET 0x400
+typedef time_t (*time_func)(time_t *);
+
+int main(void)
+{
+    printf("%ld\n", ((time_func)(VSYSCALL_PAGE + TIME_OFFSET))(NULL));
+    return 0;
+}