File: posix_fadvise64.S

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/* Copyright (C) 1995-2016 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>

#define EINVAL	22
#define ENOSYS	38
#define EOVERFLOW 75

#define SVRSP	16		/* saved register space */
#define PARMS	4+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 (__posix_fadvise64_l64)

	/* 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)

	/* 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

END (__posix_fadvise64_l64)

	.section	.text.compat, "ax"
ENTRY (__posix_fadvise64_l32)
	DO_CALL (fadvise64, 5)
	negl %eax
	ret
PSEUDO_END_ERRVAL (__posix_fadvise64_l32)

default_symbol_version (__posix_fadvise64_l64, posix_fadvise64, GLIBC_2.3.3)
symbol_version (__posix_fadvise64_l32, posix_fadvise64, GLIBC_2.2)