Fix endianness dependency

src/exploit.c

@@ -1,7 +1,10 @@
+#define _DEFAULT_SOURCE // these are needed to make htole32() work.
+#define _BSD_SOURCE // TODO: Write my own toolchain-agnostic htole32()
 #include <stdio.h>
 #include <stdint.h>
 #include <unistd.h>
 #include <string.h>
+#include <endian.h>
 
 #include "usb.h"
 
@@ -67,12 +70,12 @@ int main(int argc, char *argv[])
 	// TODO: construct the payload on-the-fly as it is sent, saving memory
 	memset(payload_buf, 0, sizeof(payload_buf));
 
-	*(uint32_t *)payload_buf = MAX_LENGTH;
+	*(uint32_t *)payload_buf = htole32(MAX_LENGTH);
 	payload_idx	= 680; // skip over the header
 
 	/* fill the stack with the intermezzo address */
 	for (int i=RCM_PAYLOAD_ADDR; i<INTERMEZZO_LOCATION; i += 4, payload_idx += 4)
-		*(uint32_t *)&payload_buf[payload_idx] = INTERMEZZO_LOCATION;
+		*(uint32_t *)&payload_buf[payload_idx] = htole32(INTERMEZZO_LOCATION);
 
 	/* load intermezzo.bin */
 	if ((intermezzo_file = fopen(INTERMEZZO_PATH, "r")) == NULL) {