initial exec support

1 files changed, 38 insertions, 0 deletions

diff --git a/tests/exec/init.c b/tests/exec/init.c
new file mode 100644
index 0000000..d56337d
--- /dev/null
+++ b/tests/exec/init.c
@@ -0,0 +1,38 @@
+#include <common/test.h>
+#include <common/cpio.h>
+
+START(pid, tid, d0, d1, d2, d3)
+{
+	UNUSED(pid);
+	UNUSED(tid);
+	UNUSED(d0);
+	UNUSED(d1);
+	UNUSED(d2);
+	UNUSED(d3);
+
+	check(pid == 0, "illegal pid for init\n");
+	id_t our_id = 0;
+	printf("forking\n");
+	id_t new_id = sys_fork(&our_id);
+	check(new_id >= 0, "error from fork\n");
+
+	if (new_id == 0) {
+		printf("hello from child with pid %ld\n", (long int)our_id);
+		printf("finding exec in cpio archive %lx...\n", d2);
+		struct cpio_header *cp = cpio_find_file((const void *)d2,
+				"exec", sizeof("exec") - 1);
+
+		check(cp, "couldn't find exec?\n");
+		long name_len = convnum(cp->c_namesize, 8, 16);
+		uintptr_t exec = (uintptr_t)(cp) + align_up(sizeof(struct cpio_header) + name_len, 4);
+		printf("found exec at %lx\n", exec);
+
+		printf("doing exec...\n");
+		sys_exec(exec, 0);
+		error("exec failed\n");
+	}
+
+	printf("hello from parent\n");
+	sys_swap(new_id);
+	check(0, "failed swapping to child\n");
+}