elf/dl-sbrk.shared.s

   1         .text
   2         .p2align 4,,15
   3         .globl  __sbrk
   4         .hidden __sbrk
   5         .type   __sbrk, @function
   6 __sbrk:
   7         pushq   %rbp
   8         pushq   %rbx
   9         movq    %rdi, %rbp
  10         subq    $8, %rsp
  11         movq    __curbrk(%rip), %rbx
  12         testq   %rbx, %rbx
  13         je      .L15
  14 .L2:
  15         cmpq    $0, %rbp
  16         je      .L1
  17         jle     .L5
  18         movq    %rbx, %rax
  19         addq    %rbp, %rax
  20         setc    %al
  21         testb   %al, %al
  22         je      .L7
  23 .L16:
  24         movl    $12, rtld_errno(%rip)
  25 .L13:
  26         movq    $-1, %rbx
  27 .L1:
  28         addq    $8, %rsp
  29         movq    %rbx, %rax
  30         popq    %rbx
  31         popq    %rbp
  32         ret
  33         .p2align 4,,10
  34         .p2align 3
  35 .L5:
  36         movq    %rbp, %rax
  37         negq    %rax
  38         cmpq    %rbx, %rax
  39         seta    %al
  40         testb   %al, %al
  41         jne     .L16
  42 .L7:
  43         leaq    (%rbx,%rbp), %rdi
  44         call    __brk
  45         testl   %eax, %eax
  46         js      .L13
  47         addq    $8, %rsp
  48         movq    %rbx, %rax
  49         popq    %rbx
  50         popq    %rbp
  51         ret
  52         .p2align 4,,10
  53         .p2align 3
  54 .L15:
  55         xorl    %edi, %edi
  56         call    __brk
  57         testl   %eax, %eax
  58         movq    __curbrk(%rip), %rbx
  59         jns     .L2
  60         jmp     .L13
  61         .size   __sbrk, .-__sbrk
  62         .weak   sbrk
  63         .set    sbrk,__sbrk
  64         .hidden __brk
  65         .hidden rtld_errno
  66         .hidden __curbrk