[thirdparty/glibc.git] / sysdeps / unix / sysv / linux / arm / mmap.S

/* Copyright (C) 1998-2015 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

	.text

ENTRY (__mmap)
	/* shuffle args */
	push	{ r5 }
	cfi_adjust_cfa_offset (4)
	cfi_rel_offset (r5, 0)
	ldr	r5, [sp, #8]
	push	{ r4 }
	cfi_adjust_cfa_offset (4)
	cfi_rel_offset (r4, 0)
	cfi_remember_state
	ldr	r4, [sp, #8]

	/* convert offset to pages */
	movs	ip, r5, lsl #20
	bne	.Linval
	mov	r5, r5, lsr #12

	/* do the syscall */
	DO_CALL (mmap2, 0)

	/* restore registers */
2:
	pop	{ r4 }
	cfi_adjust_cfa_offset (-4)
	cfi_restore (r4)
	pop	{ r5 }
	cfi_adjust_cfa_offset (-4)
	cfi_restore (r5)

	cmn	r0, $4096
	it	cc
	RETINSTR(cc, lr)
	b	PLTJMP(syscall_error)

	cfi_restore_state
.Linval:
	mov	r0, #-EINVAL
	b	2b
PSEUDO_END (__mmap)

weak_alias (__mmap, mmap)
Commit	Line	Data
	1	/* Copyright (C) 1998-2015 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
	22	.text
	23
	24	ENTRY (__mmap)
	25	/* shuffle args */
	26	push { r5 }
	27	cfi_adjust_cfa_offset (4)
	28	cfi_rel_offset (r5, 0)
	29	ldr r5, [sp, #8]
	30	push { r4 }
	31	cfi_adjust_cfa_offset (4)
	32	cfi_rel_offset (r4, 0)
	33	cfi_remember_state
	34	ldr r4, [sp, #8]
	35
	36	/* convert offset to pages */
	37	movs ip, r5, lsl #20
	38	bne .Linval
	39	mov r5, r5, lsr #12
	40
	41	/* do the syscall */
	42	DO_CALL (mmap2, 0)
	43
	44	/* restore registers */
	45	2:
	46	pop { r4 }
	47	cfi_adjust_cfa_offset (-4)
	48	cfi_restore (r4)
	49	pop { r5 }
	50	cfi_adjust_cfa_offset (-4)
	51	cfi_restore (r5)
	52
	53	cmn r0, $4096
	54	it cc
	55	RETINSTR(cc, lr)
	56	b PLTJMP(syscall_error)
	57
	58	cfi_restore_state
	59	.Linval:
	60	mov r0, #-EINVAL
	61	b 2b
	62	PSEUDO_END (__mmap)
	63
	64	weak_alias (__mmap, mmap)