Intial Thumb2 Sandbox (naclrev 6680)

src/trusted/validator_arm/testdata-thumb/it_test.S

Index: src/trusted/validator_arm/testdata-thumb/it_test.S
diff --git a/src/trusted/validator_arm/testdata-thumb/it_test.S b/src/trusted/validator_arm/testdata-thumb/it_test.S
new file mode 100644
index 0000000000000000000000000000000000000000..7dbb4b8cf4ed6a0cf7e4b357f77182c801c9f33c
--- /dev/null
+++ b/src/trusted/validator_arm/testdata-thumb/it_test.S
@@ -0,0 +1,71 @@
+#include "masks.h"
+.syntax unified
+.code 16
+.thumb_func
+.global _start
+_start:
+  // Test legit behavior
+  cmp r0, r0
+  ite eq
+  moveq r0, r0
+  movne r0, r0
+
+  // Pad to right before bundle boundary
+  mov r0, r0
+  mov r0, r0
+  mov r0, r0
+
+  // Test bundle issues.
+  ite ne
+  movne r0, r0
+  moveq r0, r0
+
+  // Next bundle
+  mov r0, r0
+  mov r0, r0
+  mov r0, r0
+  mov r0, r0
+  mov r0, r0
+  mov r0, r0
+
+
+  // Test legal branch
+  ittt ne
+  bicne r0, HIGH_TWO
+  orrne r0, LOW_FOUR
+  bxne r0
+
+  // Moving to next bundle for room...
+  mov r0, r0
+  mov r0, r0
+
+  // Test illegal branch
+  itet eq
+  biceq r0, HIGH_TWO
+  orrne r0, LOW_FOUR
+  bxeq r0
+
+  // Moving to the next bundle again
+  // (and partway in so we're not always aligned)
+  mov r0, r0
+  mov r0, r0
+  mov r0, r0
+  mov r0, r0
+
+  // Test legal data write
+  itt cc
+  biccc r0, HIGH_TWO
+  strcc r1, [r0]
+
+  // Pad
+  mov r0, r0
+  mov r0, r0
+
+  // Test illegal data write
+  ite cc
+  biccc r0, HIGH_TWO
+  strcs r1, [r0]
+
+// TODO(jasonwkim) Manually add a sequence that will fire the it_safety issue.
+// Not doing this now because the assembler will reject all such sequences,
+// so I will have to enter the hex manually.