nptl/sem_close.s

   1         .text
   2         .p2align 4,,15
   3         .type   walker, @function
   4 walker:
   5         movq    (%rdi), %rax
   6         movq    (%rdx), %rcx
   7         cmpq    %rcx, 24(%rax)
   8         je      .L4
   9         rep ret
  10         .p2align 4,,10
  11         .p2align 3
  12 .L4:
  13         movq    %rax, 8(%rdx)
  14         ret
  15         .size   walker, .-walker
  16         .p2align 4,,15
  17         .globl  sem_close
  18         .type   sem_close, @function
  19 sem_close:
  20         pushq   %rbp
  21         pushq   %rbx
  22         xorl    %eax, %eax
  23         movq    %rdi, %rbx
  24         movl    $1, %edx
  25         subq    $24, %rsp
  26         lock cmpxchgl   %edx, __sem_mappings_lock(%rip)
  27         jne     .L12
  28 .L6:
  29         movq    __sem_mappings(%rip), %rdi
  30         leaq    walker(%rip), %rsi
  31         movq    %rsp, %rdx
  32         movq    %rbx, (%rsp)
  33         movq    $0, 8(%rsp)
  34         call    __twalk_r@PLT
  35         movq    8(%rsp), %rbx
  36         testq   %rbx, %rbx
  37         je      .L7
  38         movl    16(%rbx), %eax
  39         xorl    %ebp, %ebp
  40         subl    $1, %eax
  41         testl   %eax, %eax
  42         movl    %eax, 16(%rbx)
  43         je      .L13
  44 .L8:
  45         xorl    %eax, %eax
  46 #APP
  47 # 78 "../sysdeps/pthread/sem_close.c" 1
  48         xchgl %eax, __sem_mappings_lock(%rip)
  49 # 0 "" 2
  50 #NO_APP
  51         cmpl    $1, %eax
  52         jg      .L14
  53         addq    $24, %rsp
  54         movl    %ebp, %eax
  55         popq    %rbx
  56         popq    %rbp
  57         ret
  58         .p2align 4,,10
  59         .p2align 3
  60 .L13:
  61         movq    __sem_search@GOTPCREL(%rip), %rdx
  62         leaq    __sem_mappings(%rip), %rsi
  63         movq    %rbx, %rdi
  64         call    __tdelete@PLT
  65         movq    24(%rbx), %rdi
  66         movl    $32, %esi
  67         call    munmap@PLT
  68         movq    %rbx, %rdi
  69         movl    %eax, %ebp
  70         call    free@PLT
  71         jmp     .L8
  72         .p2align 4,,10
  73         .p2align 3
  74 .L12:
  75         leaq    __sem_mappings_lock(%rip), %rdi
  76         call    __lll_lock_wait_private@PLT
  77         jmp     .L6
  78         .p2align 4,,10
  79         .p2align 3
  80 .L14:
  81         xorl    %r10d, %r10d
  82         movl    $1, %edx
  83         movl    $129, %esi
  84         leaq    __sem_mappings_lock(%rip), %rdi
  85         movl    $202, %eax
  86 #APP
  87 # 78 "../sysdeps/pthread/sem_close.c" 1
  88         syscall
  89
  90 # 0 "" 2
  91 #NO_APP
  92         addq    $24, %rsp
  93         movl    %ebp, %eax
  94         popq    %rbx
  95         popq    %rbp
  96         ret
  97 .L7:
  98         movq    errno@gottpoff(%rip), %rax
  99         movl    $-1, %ebp
 100         movl    $22, %fs:(%rax)
 101         jmp     .L8
 102         .size   sem_close, .-sem_close