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/* Copyright (C) 1995-2000,2002,2003,2004,2005,2006
Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include <bp-sym.h>
#include <bp-asm.h>
#include <kernel-features.h>
#define EINVAL 22
#define ENOSYS 38
#define EOVERFLOW 75
#define SVRSP 16 /* saved register space */
#define PARMS LINKAGE+SVRSP /* space for 4 saved regs */
#define FD PARMS
#define OFFLO FD+4
#define OFFHI OFFLO+4
#define LENLO OFFHI+4
#define LENHI LENLO+4
#define FLAGS LENHI+4
.text
ENTRY (BP_SYM (__posix_fadvise64_l64))
#ifdef __NR_fadvise64_64
/* Save registers. */
pushl %ebp
cfi_adjust_cfa_offset (4)
pushl %ebx
cfi_adjust_cfa_offset (4)
pushl %esi
cfi_adjust_cfa_offset (4)
pushl %edi
cfi_adjust_cfa_offset (4)
movl FD(%esp), %ebx
cfi_rel_offset (ebx, 8)
movl OFFLO(%esp), %ecx
movl OFFHI(%esp), %edx
movl LENLO(%esp), %esi
cfi_rel_offset (esi, 4)
movl LENHI(%esp), %edi
cfi_rel_offset (edi, 0)
movl FLAGS(%esp), %ebp
cfi_rel_offset (ebp, 12)
movl $SYS_ify(fadvise64_64), %eax
ENTER_KERNEL
/* Restore registers. */
popl %edi
cfi_adjust_cfa_offset (-4)
cfi_restore (edi)
popl %esi
cfi_adjust_cfa_offset (-4)
cfi_restore (esi)
popl %ebx
cfi_adjust_cfa_offset (-4)
cfi_restore (ebx)
popl %ebp
cfi_adjust_cfa_offset (-4)
cfi_restore (ebp)
#ifndef __ASSUME_FADVISE64_64_SYSCALL
cmpl $-ENOSYS, %eax
je 1f
#endif
/* The function returns zero, or the error number. So all we
have to do is negate the value passed back from the kernel. */
/* If 0 > %eax > -4096 there was an error. */
negl %eax
/* Successful; return the syscall's value. */
ret
#endif
#if defined __NR_fadvise64 \
&& (!defined __ASSUME_FADVISE64_64_SYSCALL || !defined __NR_fadvise64_64)
1: /* Save registers. */
pushl %ebx
cfi_adjust_cfa_offset (4)
pushl %esi
cfi_adjust_cfa_offset (4)
pushl %edi
cfi_adjust_cfa_offset (4)
/* Overflow check. */
cmpl $0, LENHI(%esp)
movl $-EOVERFLOW, %eax
jne L(overflow)
movl FD(%esp), %ebx
cfi_rel_offset (ebx, 8)
movl OFFLO(%esp), %ecx
movl OFFHI(%esp), %edx
movl LENLO(%esp), %esi
cfi_rel_offset (esi, 4)
movl FLAGS(%esp), %edi
cfi_rel_offset (edi, 0)
movl $SYS_ify(fadvise64), %eax
ENTER_KERNEL
/* Restore registers. */
L(overflow):
popl %edi
cfi_adjust_cfa_offset (-4)
cfi_restore (edi)
popl %esi
cfi_adjust_cfa_offset (-4)
cfi_restore (esi)
popl %ebx
cfi_adjust_cfa_offset (-4)
cfi_restore (ebx)
/* If 0 > %eax > -4096 there was an error. */
negl %eax
/* Successful; return the syscall's value. */
ret
#else
movl $ENOSYS, %eax
ret
#endif
END (BP_SYM (__posix_fadvise64_l64))
#ifdef __NR_fadvise64
.section .text.compat, "ax"
ENTRY (__posix_fadvise64_l32)
DO_CALL (fadvise64, 5)
negl %eax
ret
PSEUDO_END_ERRVAL (__posix_fadvise64_l32)
#else
ENTRY (BP_SYM (__posix_fadvise64_l32))
movl $ENOSYS, %eax
ret
END (BP_SYM (__posix_fadvise64_l32))
#endif
default_symbol_version (__posix_fadvise64_l64, posix_fadvise64, GLIBC_2.3.3)
symbol_version (__posix_fadvise64_l32, posix_fadvise64, GLIBC_2.2)
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