sysdeps/unix/sysv/linux/i386/posix_fadvise64.S

   1 /* Copyright (C) 1995-2016 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <sysdep.h>
  19
  20 #define EINVAL  22
  21 #define ENOSYS  38
  22 #define EOVERFLOW 75
  23
  24 #define SVRSP   16              /* saved register space */
  25 #define PARMS   4+SVRSP /* space for 4 saved regs */
  26 #define FD      PARMS
  27 #define OFFLO   FD+4
  28 #define OFFHI   OFFLO+4
  29 #define LENLO   OFFHI+4
  30 #define LENHI   LENLO+4
  31 #define FLAGS   LENHI+4
  32
  33         .text
  34 ENTRY (__posix_fadvise64_l64)
  35
  36         /* Save registers.  */
  37         pushl   %ebp
  38         cfi_adjust_cfa_offset (4)
  39         pushl   %ebx
  40         cfi_adjust_cfa_offset (4)
  41         pushl   %esi
  42         cfi_adjust_cfa_offset (4)
  43         pushl   %edi
  44         cfi_adjust_cfa_offset (4)
  45
  46         movl    FD(%esp), %ebx
  47         cfi_rel_offset (ebx, 8)
  48         movl    OFFLO(%esp), %ecx
  49         movl    OFFHI(%esp), %edx
  50         movl    LENLO(%esp), %esi
  51         cfi_rel_offset (esi, 4)
  52         movl    LENHI(%esp), %edi
  53         cfi_rel_offset (edi, 0)
  54         movl    FLAGS(%esp), %ebp
  55         cfi_rel_offset (ebp, 12)
  56
  57         movl    $SYS_ify(fadvise64_64), %eax
  58         ENTER_KERNEL
  59
  60         /* Restore registers.  */
  61         popl    %edi
  62         cfi_adjust_cfa_offset (-4)
  63         cfi_restore (edi)
  64         popl    %esi
  65         cfi_adjust_cfa_offset (-4)
  66         cfi_restore (esi)
  67         popl    %ebx
  68         cfi_adjust_cfa_offset (-4)
  69         cfi_restore (ebx)
  70         popl    %ebp
  71         cfi_adjust_cfa_offset (-4)
  72         cfi_restore (ebp)
  73
  74         /* The function returns zero, or the error number.  So all we
  75            have to do is negate the value passed back from the kernel.  */
  76         /* If 0 > %eax > -4096 there was an error.  */
  77         negl    %eax
  78
  79         /* Successful; return the syscall's value.  */
  80         ret
  81
  82 END (__posix_fadvise64_l64)
  83
  84         .section        .text.compat, "ax"
  85 ENTRY (__posix_fadvise64_l32)
  86         DO_CALL (fadvise64, 5)
  87         negl %eax
  88         ret
  89 PSEUDO_END_ERRVAL (__posix_fadvise64_l32)
  90
  91 default_symbol_version (__posix_fadvise64_l64, posix_fadvise64, GLIBC_2.3.3)
  92 symbol_version (__posix_fadvise64_l32, posix_fadvise64, GLIBC_2.2)