1 files changed, 96 insertions, 0 deletions
diff --git a/410user/progs/swexn_rampage.c b/410user/progs/swexn_rampage.c
new file mode 100644
index 0000000..4203e6d
--- /dev/null
+++ b/410user/progs/swexn_rampage.c
@@ -0,0 +1,96 @@
+/**
+ * @file swexn_rampage.c
+ * @author de0u
+ * @brief Tests a simple use case for swexn
+ * @public yes
+ * @for p3
+ */
+
+#include <stddef.h>
+#include <stdlib.h>
+#include <syscall.h>
+#include "410_tests.h"
+
+#define USER_MEM_START 0x01000000
+#define KERNEL_BOTTOM  0x00100000 // 1 megabyte; below there lie dragons
+
+#define ENOUGH 410
+
+DEF_TEST_NAME("swexn_rampage:");
+
+#define STAQ_SIZE (4096)
+static char exn_staq[STAQ_SIZE];
+#define EXN_STAQ_TOP ((void *)(&exn_staq[STAQ_SIZE-7]))
+
+void install(void);
+void rampage(void);
+void handler(void *arg, ureg_t *uregs);
+
+static unsigned int *top_addr = (unsigned int *)USER_MEM_START - sizeof (unsigned int);
+
+static int events = 0;
+
+static unsigned int start_ticks;
+
+void install(void)
+{
+    int ret;
+
+    ret = swexn(EXN_STAQ_TOP, handler, NULL, NULL);
+    if (ret < 0) {
+        REPORT_MISC("swexn call rejected");
+        REPORT_END_FAIL;
+        exit(-1);
+    }
+}
+
+void rampage(void)
+{
+    unsigned int *ip;
+
+    for (ip = top_addr; ip > (unsigned int *)KERNEL_BOTTOM; ip--)
+        *ip = 0;
+
+    REPORT_END_FAIL; // as if
+}
+
+void handler(void *arg, ureg_t *uregs)
+{
+    if (uregs->cause != SWEXN_CAUSE_PAGEFAULT) {
+        report_fmt("bad cause %d", uregs->cause);
+        REPORT_END_FAIL;
+        exit(-1);
+    }
+    if (uregs->cr2 != (unsigned int) top_addr) {
+        report_fmt("bad addr 0x%x", uregs->cr2);
+        REPORT_END_FAIL;
+        exit(-1);
+    }
+
+    TEST_PROG_PROGRESS;
+
+    if (++events == ENOUGH) {
+        report_fmt("ticks %d", get_ticks() - start_ticks);
+        REPORT_END_SUCCESS;
+        exit(0);
+    }
+
+    sleep(15);
+
+    install();
+    rampage();
+}
+
+int main()
+{
+    REPORT_START_CMPLT;
+
+    start_ticks = get_ticks();
+
+    install();
+    rampage();
+
+    REPORT_MISC("handler not run?");
+    REPORT_END_FAIL;
+    exit(-1);
+}