io/sendfile.s

   1 .text
   2 .globl sendfile
   3 .type sendfile,@function
   4 .align 1<<4
   5 sendfile:
   6         movq %rcx, %r10
   7         movl $40, %eax
   8         syscall
   9         cmpq $-4095, %rax
  10         jae 0f
  11         ret
  12 0:
  13         movq __libc_errno@GOTTPOFF(%rip), %rcx
  14         neg %eax
  15         movl %eax, %fs:(%rcx)
  16         or $-1, %rax
  17         ret
  18 .size sendfile,.-sendfile
  19 .weak sendfile64
  20 sendfile64 = sendfile