nptl/pthread_once.s

   1         .text
   2         .section        .rodata.str1.8,"aMS",@progbits,1
   3         .align 8
   4 .LC0:
   5         .string "The futex facility returned an unexpected error code.\n"
   6         .text
   7         .p2align 4,,15
   8         .type   __pthread_once_slow, @function
   9 __pthread_once_slow:
  10         pushq   %r12
  11         pushq   %rbp
  12         movl    $202, %r8d
  13         pushq   %rbx
  14         movq    %rsi, %rbp
  15         movq    %rdi, %rbx
  16         movl    $1, %r9d
  17         subq    $32, %rsp
  18 .L13:
  19         movl    (%rbx), %eax
  20 .L3:
  21         testb   $2, %al
  22         je      .L19
  23 .L7:
  24         addq    $32, %rsp
  25         xorl    %eax, %eax
  26         popq    %rbx
  27         popq    %rbp
  28         popq    %r12
  29         ret
  30         .p2align 4,,10
  31         .p2align 3
  32 .L19:
  33         movl    __fork_generation(%rip), %edx
  34         orl     $1, %edx
  35         lock cmpxchgl   %edx, (%rbx)
  36         jne     .L3
  37         cmpl    %eax, %edx
  38         jne     .L4
  39         testb   $1, %al
  40         je      .L4
  41         xorl    %r10d, %r10d
  42         movl    $128, %esi
  43         movq    %rbx, %rdi
  44         movl    %r8d, %eax
  45 #APP
  46 # 146 "../sysdeps/nptl/futex-internal.h" 1
  47         syscall
  48
  49 # 0 "" 2
  50 #NO_APP
  51         cmpq    $-4096, %rax
  52         jbe     .L13
  53         leal    11(%rax), %ecx
  54         cmpl    $11, %ecx
  55         ja      .L6
  56         movq    %r9, %rax
  57         salq    %cl, %rax
  58         testl   $2177, %eax
  59         jne     .L13
  60 .L6:
  61         leaq    .LC0(%rip), %rdi
  62         call    __libc_fatal@PLT
  63         .p2align 4,,10
  64         .p2align 3
  65 .L4:
  66         movq    %rsp, %r12
  67         leaq    clear_once_control(%rip), %rsi
  68         movq    %rbx, %rdx
  69         movq    %r12, %rdi
  70         call    __pthread_cleanup_push@PLT
  71         call    *%rbp
  72         xorl    %esi, %esi
  73         movq    %r12, %rdi
  74         call    __pthread_cleanup_pop@PLT
  75         movl    $2, (%rbx)
  76         xorl    %r10d, %r10d
  77         movl    $2147483647, %edx
  78         movl    $129, %esi
  79         movq    %rbx, %rdi
  80         movl    $202, %eax
  81 #APP
  82 # 209 "../sysdeps/nptl/futex-internal.h" 1
  83         syscall
  84
  85 # 0 "" 2
  86 #NO_APP
  87         cmpq    $-4096, %rax
  88         jbe     .L7
  89         cmpl    $-22, %eax
  90         je      .L7
  91         cmpl    $-14, %eax
  92         je      .L7
  93         jmp     .L6
  94         .size   __pthread_once_slow, .-__pthread_once_slow
  95         .p2align 4,,15
  96         .type   clear_once_control, @function
  97 clear_once_control:
  98         movl    $0, (%rdi)
  99         xorl    %r10d, %r10d
 100         movl    $2147483647, %edx
 101         movl    $129, %esi
 102         movl    $202, %eax
 103 #APP
 104 # 209 "../sysdeps/nptl/futex-internal.h" 1
 105         syscall
 106
 107 # 0 "" 2
 108 #NO_APP
 109         cmpq    $-4096, %rax
 110         ja      .L26
 111 .L20:
 112         rep ret
 113         .p2align 4,,10
 114         .p2align 3
 115 .L26:
 116         cmpl    $-22, %eax
 117         je      .L20
 118         cmpl    $-14, %eax
 119         je      .L20
 120         leaq    .LC0(%rip), %rdi
 121         subq    $8, %rsp
 122         call    __libc_fatal@PLT
 123         .size   clear_once_control, .-clear_once_control
 124         .p2align 4,,15
 125         .globl  __pthread_once
 126         .type   __pthread_once, @function
 127 __pthread_once:
 128         movl    (%rdi), %eax
 129         testb   $2, %al
 130         je      .L29
 131         xorl    %eax, %eax
 132         ret
 133         .p2align 4,,10
 134         .p2align 3
 135 .L29:
 136         jmp     __pthread_once_slow
 137         .size   __pthread_once, .-__pthread_once
 138         .weak   pthread_once
 139         .set    pthread_once,__pthread_once
 140         .comm   __fork_generation,8,8