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unixsys.S revision 1.1 
      1 /*	$NetBSD: unixsys.S,v 1.1 2009/03/02 09:33:02 nonaka Exp $	*/
      2 /*	$OpenBSD: unixsys.S,v 1.6 2005/05/24 20:38:20 uwe Exp $	*/
      3 
      4 /*
      5  * Copyright (c) 2005 Uwe Stuehler <uwe (at) bsdx.de>
      6  *
      7  * Permission to use, copy, modify, and distribute this software for any
      8  * purpose with or without fee is hereby granted, provided that the above
      9  * copyright notice and this permission notice appear in all copies.
     10  *
     11  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
     12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
     13  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
     14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
     16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
     17  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     18  */
     19 
     20 #include <machine/asm.h>
     21 
     22 #include "compat_linux.h"
     23 
     24 	.text
     25 
     26 #define RSYSCALL(x) \
     27 	ENTRY(__CONCAT(u,x)) \
     28 		swi	__CONCAT(__NR_,x); \
     29 		b	1f
     30 
     31 RSYSCALL(exit)
     32 RSYSCALL(read)
     33 RSYSCALL(write)
     34 RSYSCALL(open)
     35 RSYSCALL(close)
     36 RSYSCALL(lseek32)
     37 RSYSCALL(ioctl)
     38 RSYSCALL(stat)
     39 
     40 1:
     41 	cmn	r0, #4096
     42 	movcc	pc, lr
     43 	rsb	r0, r0, #0
     44 	ldr	r1, .Lerrno	/* XXX clobbers arg1 */
     45 	str	r0, [r1]
     46 	mvn	r0, #0
     47 	mov	pc, lr
     48 
     49 .Lerrno:
     50 	.word	errno
     51 
     52 /* XXX only works for up to four arguments. */
     53 ENTRY(syscall)
     54 	swi	__NR_syscall
     55 	b	1b
     56 
     57 ENTRY(uselect)
     58 	str	r4, [sp, #-4]!
     59 	ldr	r4, [sp, #4]
     60 	swi	__NR_select
     61 	ldr	r4, [sp], #4
     62 	cmn	r0, #4096
     63 	movcc	pc, lr
     64 	rsb	r0, r0, #0
     65 	str	r1, [sp, #-4]!
     66 	ldr	r1, .Lerrno
     67 	str	r0, [r1]
     68 	ldr	r1, [sp], #4
     69 	mvn	r0, #0
     70 	mov	pc, lr
     71 
     72 .data
     73 
     74 	.global errno
     75 errno:
     76 	.word	0
     77