Some changes, syscalls use reg structs and have return values

src/edit.c

@@ -0,0 +1,13 @@
+#include <stdio.h>
+
+__attribute__ ((section("entry")))
+int main(int argc, char** argv) {
+    if (argc < 2) {
+        printf("Usage: %s <file>\n", argv[0]);
+        return 1;
+    }
+
+    printf("%s\n", argv[1]);
+
+    return 0;
+}