Add srop example

Author: r888800009

srop/srop

@@ -0,0 +1,23 @@
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+// gcc srop.c -o srop -g -fno-stack-protector -no-pie
+
+void my_restore_rt() { asm("mov $0xf, %rax; syscall; syscall; ret"); }
+
+int main() {
+  char *new_stack = malloc(0x40000);
+  char buf[0x10];
+
+  setvbuf(stdout, buf, _IONBF, 0);
+  setvbuf(stderr, buf, _IONBF, 0);
+  setvbuf(stdin, buf, _IONBF, 0);
+
+  printf("my_restore_rt: %p\n", my_restore_rt);
+  printf("new_mmap: %p\n", new_stack);
+  read(0, buf, 0x1000);
+  puts("done");
+  return 0;
+}
+