io/copy_file_range.s

   1         .text
   2         .p2align 4,,15
   3         .globl  copy_file_range
   4         .type   copy_file_range, @function
   5 copy_file_range:
   6         movq    %rcx, %r10
   7 #APP
   8 # 28 "../sysdeps/unix/sysv/linux/copy_file_range.c" 1
   9         movl %fs:24,%eax
  10 # 0 "" 2
  11 #NO_APP
  12         testl   %eax, %eax
  13         jne     .L2
  14         movl    $326, %eax
  15 #APP
  16 # 28 "../sysdeps/unix/sysv/linux/copy_file_range.c" 1
  17         syscall
  18
  19 # 0 "" 2
  20 #NO_APP
  21         cmpq    $-4096, %rax
  22         ja      .L9
  23         rep ret
  24         .p2align 4,,10
  25         .p2align 3
  26 .L2:
  27         pushq   %r15
  28         pushq   %r14
  29         movq    %r8, %r15
  30         pushq   %r13
  31         pushq   %r12
  32         movq    %rcx, %r14
  33         pushq   %rbp
  34         pushq   %rbx
  35         movl    %edx, %r13d
  36         movq    %rsi, %r12
  37         movl    %edi, %ebx
  38         subq    $24, %rsp
  39         movl    %r9d, 8(%rsp)
  40         call    __libc_enable_asynccancel
  41         movl    8(%rsp), %r9d
  42         movl    %eax, %ebp
  43         movq    %r15, %r8
  44         movq    %r14, %r10
  45         movl    %r13d, %edx
  46         movq    %r12, %rsi
  47         movl    %ebx, %edi
  48         movl    $326, %eax
  49 #APP
  50 # 28 "../sysdeps/unix/sysv/linux/copy_file_range.c" 1
  51         syscall
  52
  53 # 0 "" 2
  54 #NO_APP
  55         cmpq    $-4096, %rax
  56         ja      .L10
  57 .L4:
  58         movl    %ebp, %edi
  59         movq    %rax, 8(%rsp)
  60         call    __libc_disable_asynccancel
  61         movq    8(%rsp), %rax
  62         addq    $24, %rsp
  63         popq    %rbx
  64         popq    %rbp
  65         popq    %r12
  66         popq    %r13
  67         popq    %r14
  68         popq    %r15
  69         ret
  70         .p2align 4,,10
  71         .p2align 3
  72 .L9:
  73         movq    __libc_errno@gottpoff(%rip), %rdx
  74         negl    %eax
  75         movl    %eax, %fs:(%rdx)
  76         movq    $-1, %rax
  77         ret
  78 .L10:
  79         movq    __libc_errno@gottpoff(%rip), %rdx
  80         negl    %eax
  81         movl    %eax, %fs:(%rdx)
  82         movq    $-1, %rax
  83         jmp     .L4
  84         .size   copy_file_range, .-copy_file_range
  85         .hidden __libc_disable_asynccancel
  86         .hidden __libc_enable_asynccancel