csu/check_fds.s

   1         .text
   2         .section        .rodata.str1.1,"aMS",@progbits,1
   3 .LC0:
   4         .string "/dev/full"
   5 .LC1:
   6         .string "/dev/null"
   7         .text
   8         .p2align 4,,15
   9         .type   check_one_fd, @function
  10 check_one_fd:
  11         pushq   %r12
  12         pushq   %rbp
  13         xorl    %eax, %eax
  14         pushq   %rbx
  15         movl    %esi, %ebp
  16         movl    $1, %esi
  17         movl    %edi, %ebx
  18         subq    $144, %rsp
  19         call    __fcntl64_nocancel
  20         cmpl    $-1, %eax
  21         je      .L11
  22 .L1:
  23         addq    $144, %rsp
  24         popq    %rbx
  25         popq    %rbp
  26         popq    %r12
  27         ret
  28 .L11:
  29         movq    __libc_errno@gottpoff(%rip), %rax
  30         cmpl    $9, %fs:(%rax)
  31         jne     .L1
  32         leaq    .LC1(%rip), %rax
  33         leaq    .LC0(%rip), %rdi
  34         xorl    %r12d, %r12d
  35         cmpl    $131072, %ebp
  36         movl    %ebp, %esi
  37         setne   %r12b
  38         cmove   %rax, %rdi
  39         xorl    %edx, %edx
  40         xorl    %eax, %eax
  41         leaq    259(,%r12,4), %r12
  42         call    __open_nocancel
  43         cmpl    %eax, %ebx
  44         jne     .L5
  45         movq    %rsp, %rsi
  46         movl    %ebx, %edi
  47         call    __fstat64
  48         testl   %eax, %eax
  49         jne     .L5
  50         movl    24(%rsp), %eax
  51         andl    $61440, %eax
  52         cmpl    $8192, %eax
  53         jne     .L5
  54         cmpq    %r12, 40(%rsp)
  55         je      .L1
  56         .p2align 4,,10
  57         .p2align 3
  58 .L5:
  59 #APP
  60 # 81 "check_fds.c" 1
  61         hlt
  62 # 0 "" 2
  63 #NO_APP
  64         jmp     .L5
  65         .size   check_one_fd, .-check_one_fd
  66         .p2align 4,,15
  67         .globl  __libc_check_standard_fds
  68         .hidden __libc_check_standard_fds
  69         .type   __libc_check_standard_fds, @function
  70 __libc_check_standard_fds:
  71         subq    $8, %rsp
  72         movl    $131073, %esi
  73         xorl    %edi, %edi
  74         call    check_one_fd
  75         movl    $131072, %esi
  76         movl    $1, %edi
  77         call    check_one_fd
  78         movl    $131072, %esi
  79         movl    $2, %edi
  80         addq    $8, %rsp
  81         jmp     check_one_fd
  82         .size   __libc_check_standard_fds, .-__libc_check_standard_fds
  83         .hidden __fstat64
  84         .hidden __open_nocancel
  85         .hidden __fcntl64_nocancel