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From: Peter Maydell <peter.maydell@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PULL 05/20] tests/tcg/aarch64: Add pauth-4
Date: Thu, 23 Jan 2020 15:30:26 +0000
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From: Richard Henderson <richard.henderson@linaro.org>
Perform the set of operations and test described in LP 1859713.
Suggested-by: Adrien GRASSEIN <adrien.grassein@smile.fr>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200116230809.19078-5-richard.henderson@linaro.org
[PMM: fixed hard-coded tabs]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
tests/tcg/aarch64/Makefile.target | 2 +-
tests/tcg/aarch64/pauth-4.c | 25 +++++++++++++++++++++++++
2 files changed, 26 insertions(+), 1 deletion(-)
create mode 100644 tests/tcg/aarch64/pauth-4.c
diff --git a/tests/tcg/aarch64/Makefile.target b/tests/tcg/aarch64/Makefile=
.target
index 374c8d6830f..efa67cf1e9e 100644
--- a/tests/tcg/aarch64/Makefile.target
+++ b/tests/tcg/aarch64/Makefile.target
@@ -18,7 +18,7 @@ run-fcvt: fcvt
$(call diff-out,$<,$(AARCH64_SRC)/fcvt.ref)
=20
# Pauth Tests
-AARCH64_TESTS +=3D pauth-1 pauth-2
+AARCH64_TESTS +=3D pauth-1 pauth-2 pauth-4
run-pauth-%: QEMU_OPTS +=3D -cpu max
pauth-%: CFLAGS +=3D -march=3Darmv8.3-a
=20
diff --git a/tests/tcg/aarch64/pauth-4.c b/tests/tcg/aarch64/pauth-4.c
new file mode 100644
index 00000000000..1040e92aec3
--- /dev/null
+++ b/tests/tcg/aarch64/pauth-4.c
@@ -0,0 +1,25 @@
+#include <stdint.h>
+#include <assert.h>
+
+int main()
+{
+ uintptr_t x, y;
+
+ asm("mov %0, lr\n\t"
+ "pacia %0, sp\n\t" /* sigill if pauth not supported */
+ "eor %0, %0, #4\n\t" /* corrupt single bit */
+ "mov %1, %0\n\t"
+ "autia %1, sp\n\t" /* validate corrupted pointer */
+ "xpaci %0\n\t" /* strip pac from corrupted pointer */
+ : "=3Dr"(x), "=3Dr"(y));
+
+ /*
+ * Once stripped, the corrupted pointer is of the form 0x0000...wxyz.
+ * We expect the autia to indicate failure, producing a pointer of the
+ * form 0x000e....wxyz. Use xpaci and !=3D for the test, rather than
+ * extracting explicit bits from the top, because the location of the
+ * error code "e" depends on the configuration of virtual memory.
+ */
+ assert(x !=3D y);
+ return 0;
+}
--=20
2.20.1