tests/tcg: Add arm and aarch64 pc alignment tests

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

2 files changed, 39 insertions, 2 deletions

diff --git a/tests/tcg/aarch64/Makefile.target b/tests/tcg/aarch64/Makefile.target
index 2c05c90..1d96790 100644
--- a/tests/tcg/aarch64/Makefile.target
+++ b/tests/tcg/aarch64/Makefile.target
@@ -8,8 +8,8 @@ VPATH 		+= $(ARM_SRC)
 AARCH64_SRC=$(SRC_PATH)/tests/tcg/aarch64
 VPATH 		+= $(AARCH64_SRC)
 
-# Float-convert Tests
-AARCH64_TESTS=fcvt
+# Base architecture tests
+AARCH64_TESTS=fcvt pcalign-a64
 
 fcvt: LDFLAGS+=-lm
 
diff --git a/tests/tcg/aarch64/pcalign-a64.c b/tests/tcg/aarch64/pcalign-a64.c
new file mode 100644
index 0000000..6b9277f
--- /dev/null
+++ b/tests/tcg/aarch64/pcalign-a64.c
@@ -0,0 +1,37 @@
+/* Test PC misalignment exception */
+
+#include <assert.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+static void *expected;
+
+static void sigbus(int sig, siginfo_t *info, void *vuc)
+{
+    assert(info->si_code == BUS_ADRALN);
+    assert(info->si_addr == expected);
+    exit(EXIT_SUCCESS);
+}
+
+int main()
+{
+    void *tmp;
+
+    struct sigaction sa = {
+        .sa_sigaction = sigbus,
+        .sa_flags = SA_SIGINFO
+    };
+
+    if (sigaction(SIGBUS, &sa, NULL) < 0) {
+        perror("sigaction");
+        return EXIT_FAILURE;
+    }
+
+    asm volatile("adr %0, 1f + 1\n\t"
+                 "str %0, %1\n\t"
+                 "br  %0\n"
+                 "1:"
+                 : "=&r"(tmp), "=m"(expected));
+    abort();
+}