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[PATCH 4/4] tests/tcg/aarch64: Add pauth-4
From: |
Richard Henderson |
Subject: |
[PATCH 4/4] tests/tcg/aarch64: Add pauth-4 |
Date: |
Thu, 16 Jan 2020 13:08:09 -1000 |
Perform the set of operations and test described in LP 1859713.
Suggested-by: Adrien GRASSEIN <address@hidden>
Signed-off-by: Richard Henderson <address@hidden>
---
tests/tcg/aarch64/pauth-4.c | 25 +++++++++++++++++++++++++
tests/tcg/aarch64/Makefile.target | 2 +-
2 files changed, 26 insertions(+), 1 deletion(-)
create mode 100644 tests/tcg/aarch64/pauth-4.c
diff --git a/tests/tcg/aarch64/pauth-4.c b/tests/tcg/aarch64/pauth-4.c
new file mode 100644
index 0000000000..4b22e6e282
--- /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 */
+ : "=r"(x), "=r"(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 != 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 != y);
+ return 0;
+}
diff --git a/tests/tcg/aarch64/Makefile.target
b/tests/tcg/aarch64/Makefile.target
index 374c8d6830..efa67cf1e9 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)
# Pauth Tests
-AARCH64_TESTS += pauth-1 pauth-2
+AARCH64_TESTS += pauth-1 pauth-2 pauth-4
run-pauth-%: QEMU_OPTS += -cpu max
pauth-%: CFLAGS += -march=armv8.3-a
--
2.20.1
- [PATCH 0/4] target/arm: Fix ComputePAC (LP 1859713), Richard Henderson, 2020/01/16
- [PATCH 1/4] target/arm: Fix PAuth sbox functions, Richard Henderson, 2020/01/16
- [PATCH 3/4] tests/tcg/aarch64: Add pauth-3, Richard Henderson, 2020/01/16
- [PATCH 4/4] tests/tcg/aarch64: Add pauth-4,
Richard Henderson <=
- [PATCH 2/4] tests/tcg/aarch64: Fix compilation parameters for pauth-%, Richard Henderson, 2020/01/16
- Re: [PATCH 0/4] target/arm: Fix ComputePAC (LP 1859713), no-reply, 2020/01/17
- Re: [PATCH 0/4] target/arm: Fix ComputePAC (LP 1859713), Peter Maydell, 2020/01/20