io/write.s

   1         .text
   2         .p2align 4,,15
   3         .globl  __libc_write
   4         .hidden __libc_write
   5         .type   __libc_write, @function
   6 __libc_write:
   7 #APP
   8 # 26 "../sysdeps/unix/sysv/linux/write.c" 1
   9         movl %fs:24,%eax
  10 # 0 "" 2
  11 #NO_APP
  12         testl   %eax, %eax
  13         jne     .L2
  14         movl    $1, %eax
  15 #APP
  16 # 26 "../sysdeps/unix/sysv/linux/write.c" 1
  17         syscall
  18
  19 # 0 "" 2
  20 #NO_APP
  21         cmpq    $-4096, %rax
  22         ja      .L9
  23         rep ret
  24         .p2align 4,,10
  25         .p2align 3
  26 .L2:
  27         pushq   %r12
  28         pushq   %rbp
  29         movq    %rdx, %r12
  30         pushq   %rbx
  31         movq    %rsi, %rbp
  32         movl    %edi, %ebx
  33         subq    $16, %rsp
  34         call    __libc_enable_asynccancel
  35         movq    %r12, %rdx
  36         movl    %eax, %r8d
  37         movq    %rbp, %rsi
  38         movl    %ebx, %edi
  39         movl    $1, %eax
  40 #APP
  41 # 26 "../sysdeps/unix/sysv/linux/write.c" 1
  42         syscall
  43
  44 # 0 "" 2
  45 #NO_APP
  46         cmpq    $-4096, %rax
  47         ja      .L10
  48 .L4:
  49         movl    %r8d, %edi
  50         movq    %rax, 8(%rsp)
  51         call    __libc_disable_asynccancel
  52         movq    8(%rsp), %rax
  53         addq    $16, %rsp
  54         popq    %rbx
  55         popq    %rbp
  56         popq    %r12
  57         ret
  58         .p2align 4,,10
  59         .p2align 3
  60 .L9:
  61         movq    __libc_errno@gottpoff(%rip), %rdx
  62         negl    %eax
  63         movl    %eax, %fs:(%rdx)
  64         movq    $-1, %rax
  65         ret
  66 .L10:
  67         movq    __libc_errno@gottpoff(%rip), %rdx
  68         negl    %eax
  69         movl    %eax, %fs:(%rdx)
  70         movq    $-1, %rax
  71         jmp     .L4
  72         .size   __libc_write, .-__libc_write
  73         .weak   write
  74         .hidden write
  75         .set    write,__libc_write
  76         .weak   __write
  77         .hidden __write
  78         .set    __write,__libc_write
  79         .hidden __libc_disable_asynccancel
  80         .hidden __libc_enable_asynccancel