/* Copyright (C) 2000 Free Software Foundation, Inc.
   Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
   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 Library General Public License as
   published by the Free Software Foundation; either version 2 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include <sysdep.h>

#define EINVAL  22
#define ENOSYS  38

	.text
ENTRY(__mmap64)
	/* Save registers and setup stack frame.  */
	stm     %r6,%r15,24(%r15)
	lr      %r1,%r15
	ahi     %r15,-120               /* Buy stack space.   */
	st      %r1,0(%r15)             /* Store back chain.  */

	/* Store parameters on stack, because mmap2 and old_mmap
	 * take only one parameter: a pointer to the parameter area.  */
	st      %r6,0x70(%r15)          /* Store 'fd'.      */
	st      %r5,0x6C(%r15)          /* Store 'flags'.   */
	st      %r4,0x68(%r15)          /* Store 'prot'.    */
	st      %r3,0x64(%r15)          /* Store 'length'.  */
	st      %r2,0x60(%r15)          /* Store 'start'.   */

#ifdef __NR_mmap2
	lm      %r0,%r1,216(%r15)       /* Load 64 bit offset.  */
	tml     %r1,0x0fff              /* Offset page aligned ?  */
	jnz     2f                      /* No -> EINVAL.  */
	srdl    %r0,12                  /* mmap2 takes the offset in pages.  */
	ltr     %r0,%r0                 /* Offset > 2^44 ?  */
	jnz     2f
	st      %r1,0x74(%r15)          /* Store page offset.  */

	la      %r2,0x60(%r15)          /* Load address of parameter list.  */
	svc     SYS_ify(mmap2)          /* Do the system call trap.  */

#ifndef __ASSUME_MMAP2_SYSCALL
	chi     %r0,-ENOSYS
	je	1f
#endif

	l       %r15,0(%r15)            /* Load back chain.  */
	lm      %r6,%r15,24(%r15)       /* Load registers.  */

	/* Check gpr 2 for error.  */
	lhi     %r0,-4096
	clr     %r2,%r0
	jnl     SYSCALL_ERROR_LABEL

	/* Successful; return the syscall's value.  */
	br      %r14

#endif

#if !defined __ASSUME_MMAP2_SYSCALL || !defined __NR_mmap2
1:	lm      %r0,%r1,216(%r15)       /* Load 64 bit offset.  */
	st      %r1,0x74(%r15)          /* Store lower word of offset.  */
	ltr     %r0,%r0                 /* Offset > 2^32 ?  */
	jnz     2f
	alr     %r1,%r3                 /* Add length to offset.  */
	brc     3,2f                    /* Carry -> EINVAL.  */

	la      %r2,0x60(%r15)          /* Load address of parameter list.  */
	svc     SYS_ify(mmap2)          /* Do the system call trap.  */

	l       %r15,0(%r15)            /* Load back chain.  */
	lm      %r6,%r15,24(%r15)       /* Load registers.  */

	/* Check gpr 2 for error.  */
	lhi     %r0,-4096
	clr     %r2,%r0
	jnl     SYSCALL_ERROR_LABEL

	/* Successful; return the syscall's value.  */
	br      %r14
#endif

2:	lhi     %r2,-EINVAL
	l       %r15,0(%r15)            /* Load back chain.  */
	lm      %r6,%r15,24(%r15)       /* Load registers.  */
	j       SYSCALL_ERROR_LABEL
	
PSEUDO_END (__mmap64)

weak_alias (__mmap64, mmap64)