freebsd_amd64_abi_write_test.s

  .text
  .globl  main
  .p2align  4, 0x90
  .type main,@function
main:
  pushq %rbp
  movq  %rsp, %rbp

  ## argc -> r8d
  movl  %edi, %r8d

  ## write
  leaq  _new_line(%rip), %rsi
  addb  %r8b, (%rsi)

  movl  $1, %edi # descriptor
  movl  $2, %edx # str length
  movl  $4, %eax # write sysnr
  syscall

  ## write
  leaq  _new_line_two(%rip), %rsi
  addb  %r8b, (%rsi)

  movl  $1, %edi # descriptor
  movl  $2, %edx # str length
  movl  $4, %eax # write sysnr
  syscall

  # exit
  xorl  %edi, %edi
  movl  $1,   %eax
  syscall

  xorl  %eax, %eax
  popq  %rbp
  retq

  .type new_line,@object
  .data
  .globl  _new_line
_new_line:
  .asciz  "0\n"
  .size _new_line, 2

  .type _new_line_two,@object
  .data
  .globl  _new_line_two
_new_line_two:
  .asciz  "0\n"
  .size _new_line_two, 2

.ident  "FreeBSD manual"
.section  ".note.GNU-stack","",@progbits
.addrsig