posix/fork.s

   1         .text
   2         .p2align 4,,15
   3         .globl  __libc_fork
   4         .type   __libc_fork, @function
   5 __libc_fork:
   6         pushq   %r12
   7         pushq   %rbp
   8         pushq   %rbx
   9         subq    $176, %rsp
  10 #APP
  11 # 57 "../sysdeps/nptl/fork.c" 1
  12         movl %fs:24,%ebx
  13 # 0 "" 2
  14 #NO_APP
  15         xorl    %ebp, %ebp
  16         testl   %ebx, %ebx
  17         setne   %bpl
  18         xorl    %edi, %edi
  19         movl    %ebp, %esi
  20         call    __run_fork_handlers
  21         testl   %ebx, %ebx
  22         je      .L3
  23         cmpq    $0, __nss_database_fork_prepare_parent@GOTPCREL(%rip)
  24         je      .L4
  25         movq    %rsp, %rdi
  26         call    __nss_database_fork_prepare_parent@PLT
  27 .L4:
  28         call    _IO_list_lock
  29         cmpq    $0, __malloc_fork_lock_parent@GOTPCREL(%rip)
  30         je      .L3
  31         call    __malloc_fork_lock_parent@PLT
  32 .L3:
  33         movq    %fs:16, %rax
  34         xorl    %r8d, %r8d
  35         xorl    %edx, %edx
  36         xorl    %esi, %esi
  37         movl    $18874385, %edi
  38         leaq    720(%rax), %r10
  39         movl    $56, %eax
  40 #APP
  41 # 49 "../sysdeps/unix/sysv/linux/arch-fork.h" 1
  42         syscall
  43
  44 # 0 "" 2
  45 #NO_APP
  46         cmpq    $-4096, %rax
  47         ja      .L46
  48         testl   %eax, %eax
  49         movl    %eax, %r12d
  50         jne     .L7
  51         movq    __fork_generation_pointer(%rip), %rax
  52         movq    %fs:16, %rdi
  53         testq   %rax, %rax
  54         je      .L8
  55         addq    $4, (%rax)
  56 .L8:
  57         cmpq    $0, __nptl_set_robust@GOTPCREL(%rip)
  58         leaq    736(%rdi), %rax
  59         movq    %rax, 728(%rdi)
  60         movq    %rax, 736(%rdi)
  61         je      .L9
  62         call    __nptl_set_robust@PLT
  63 .L9:
  64         testl   %ebx, %ebx
  65         je      .L11
  66         cmpq    $0, __malloc_fork_unlock_child@GOTPCREL(%rip)
  67         je      .L12
  68         call    __malloc_fork_unlock_child@PLT
  69 .L12:
  70         call    _IO_iter_begin
  71         movq    %rax, %rbx
  72         jmp     .L13
  73         .p2align 4,,10
  74         .p2align 3
  75 .L14:
  76         movq    %rbx, %rdi
  77         call    _IO_iter_next
  78         movq    %rax, %rbx
  79 .L13:
  80         call    _IO_iter_end
  81         cmpq    %rax, %rbx
  82         je      .L47
  83         movq    %rbx, %rdi
  84         call    _IO_iter_file
  85         movl    (%rax), %eax
  86         testb   $-128, %ah
  87         jne     .L14
  88         movq    %rbx, %rdi
  89         call    _IO_iter_file
  90         movq    136(%rax), %rax
  91         movq    $0, (%rax)
  92         movq    $0, 8(%rax)
  93         jmp     .L14
  94         .p2align 4,,10
  95         .p2align 3
  96 .L47:
  97         call    _IO_list_resetlock
  98         cmpq    $0, __nss_database_fork_subprocess@GOTPCREL(%rip)
  99         je      .L11
 100         movq    %rsp, %rdi
 101         call    __nss_database_fork_subprocess@PLT
 102 .L11:
 103         pxor    %xmm0, %xmm0
 104         movl    %ebp, %esi
 105         movl    $1, %edi
 106         movq    $0, 32+_dl_load_lock(%rip)
 107         movups  %xmm0, 16+_dl_load_lock(%rip)
 108         movl    $1, 16+_dl_load_lock(%rip)
 109         movups  %xmm0, _dl_load_lock(%rip)
 110         call    __run_fork_handlers
 111         addq    $176, %rsp
 112         movl    %r12d, %eax
 113         popq    %rbx
 114         popq    %rbp
 115         popq    %r12
 116         ret
 117         .p2align 4,,10
 118         .p2align 3
 119 .L46:
 120         movq    __libc_errno@gottpoff(%rip), %rdx
 121         negl    %eax
 122         movl    $-1, %r12d
 123         movl    %eax, %fs:(%rdx)
 124 .L7:
 125         testl   %ebx, %ebx
 126         je      .L18
 127         cmpq    $0, __malloc_fork_unlock_parent@GOTPCREL(%rip)
 128         je      .L19
 129         call    __malloc_fork_unlock_parent@PLT
 130 .L19:
 131         call    _IO_list_unlock
 132 .L18:
 133         movl    %ebp, %esi
 134         movl    $2, %edi
 135         call    __run_fork_handlers
 136         addq    $176, %rsp
 137         movl    %r12d, %eax
 138         popq    %rbx
 139         popq    %rbp
 140         popq    %r12
 141         ret
 142         .size   __libc_fork, .-__libc_fork
 143         .weak   fork
 144         .set    fork,__libc_fork
 145         .weak   __fork
 146         .hidden __fork
 147         .set    __fork,__libc_fork
 148         .weak   __malloc_fork_unlock_parent
 149         .weak   __nss_database_fork_subprocess
 150         .weak   __malloc_fork_unlock_child
 151         .weak   __nptl_set_robust
 152         .weak   __malloc_fork_lock_parent
 153         .weak   __nss_database_fork_prepare_parent
 154         .hidden _IO_list_unlock
 155         .hidden __malloc_fork_unlock_parent
 156         .hidden __nss_database_fork_subprocess
 157         .hidden _IO_list_resetlock
 158         .hidden _IO_iter_file
 159         .hidden _IO_iter_end
 160         .hidden _IO_iter_next
 161         .hidden _IO_iter_begin
 162         .hidden __malloc_fork_unlock_child
 163         .hidden __fork_generation_pointer
 164         .hidden __malloc_fork_lock_parent
 165         .hidden _IO_list_lock
 166         .hidden __nss_database_fork_prepare_parent
 167         .hidden __run_fork_handlers