1 files changed, 25 insertions, 0 deletions
diff --git a/tests/tcg/aarch64/pauth-4.c b/tests/tcg/aarch64/pauth-4.c
new file mode 100644
index 0000000000..1040e92aec
--- /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;
+}