root@kali:~/ohm/pwd_asm#  nasm -f elf64 -o pwd_exec.o pwd_exec.asm
root@kali:~/ohm/pwd_asm#  ld pwd_exec.o -o pwd_exec
root@kali:~/ohm/pwd_asm#  objdump -D -M intel pwd_exec

pwd_exec:     file format elf64-x86-64


Disassembly of section .text:

0000000000400080 <_start>:
  400080:	48 31 d2             	xor    rdx,rdx
  400083:	52                   	push   rdx
  400084:	48 b8 2f 62 69 6e 2f 	movabs rax,0x6477702f6e69622f
  40008b:	70 77 64 
  40008e:	50                   	push   rax
  40008f:	48 89 e7             	mov    rdi,rsp
  400092:	52                   	push   rdx
  400093:	57                   	push   rdi
  400094:	48 89 e6             	mov    rsi,rsp
  400097:	48 8d 42 3b          	lea    rax,[rdx+0x3b]
  40009b:	0f 05                	syscall
