nptl/read.s

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