1 files changed, 20 insertions, 0 deletions

diff --git a/pintos-progos/tests/vm/pt-grow-pusha.c b/pintos-progos/tests/vm/pt-grow-pusha.c
new file mode 100644
index 0000000..f9762a5
--- /dev/null
+++ b/pintos-progos/tests/vm/pt-grow-pusha.c
@@ -0,0 +1,20 @@
+/* Expand the stack by 32 bytes all at once using the PUSHA
+   instruction.
+   This must succeed. */
+
+#include <string.h>
+#include "tests/arc4.h"
+#include "tests/cksum.h"
+#include "tests/lib.h"
+#include "tests/main.h"
+
+void
+test_main (void)
+{
+  asm volatile
+    ("movl %%esp, %%eax;"        /* Save a copy of the stack pointer. */
+     "andl $0xfffff000, %%esp;"  /* Move stack pointer to bottom of page. */
+     "pushal;"                   /* Push 32 bytes on stack at once. */
+     "movl %%eax, %%esp"         /* Restore copied stack pointer. */
+     : : : "eax");               /* Tell GCC we destroyed eax. */
+}