[apple/xnu.git] / libsyscall / wrappers / varargs_wrappers.s

/*
 * Copyright (c) 2011-2013 Apple Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */

#ifdef __arm64__

#include "../custom/SYS.h"
#include <mach/arm64/asm.h>

/* 
 * Stubs are to handle the ARM64 ABI for variadic functions' 
 * not matching the ABI used by the system call handler.
 */

/*
 *	sem_t* sem_open(const char *name, int oflag, ...);
 *	sem_t* __sem_open(const char *name, int oflag, int mode, int value);
 */
MI_ENTRY_POINT(_sem_open) 
	ARM64_STACK_PROLOG
	PUSH_FRAME
#if __LP64__
	ldp	x2, x3, [fp, #16]
#else
	ldp	w2, w3, [fp, #16]
#endif
	MI_CALL_EXTERNAL(___sem_open)
#if !__LP64__
	/* xnu returns a 64-bit '-1' on failure, but pointers must have the high
	 * 32-bits set to zero. The following instruction is equivalent to
	 * masking off the top 32-bits.
	 */
	mov w0, w0
#endif
	POP_FRAME
	ARM64_STACK_EPILOG

/* 
 * int shm_open(const char *, int, ...);
 * int __shm_open(const char*, int oflag, int mode);
 */
MI_ENTRY_POINT(_shm_open)
	ARM64_STACK_PROLOG
	PUSH_FRAME
#if __LP64__
	ldr	x2, [fp, #16]
#else
	ldr	w2, [fp, #16]
#endif
	MI_CALL_EXTERNAL(___shm_open)
	POP_FRAME
	ARM64_STACK_EPILOG

/*
 * int msgsys(int, ...);
 * int __msgsys(int which, int a2, int a3, int a4, int a5);
 */
MI_ENTRY_POINT(_msgsys)
	ARM64_STACK_PROLOG
	PUSH_FRAME
#if __LP64__
	ldp	x1, x2, [fp, #16]
	ldp	x3, x4, [fp, #32]
#else
	ldp	w1, w2, [fp, #16]
	ldp	w3, w4, [fp, #24]
#endif
	MI_CALL_EXTERNAL(___msgsys)
	POP_FRAME

/*
 * int semsys(int, ...);
 * int __semsys(int which, int a2, int a3, int a4, int a5);
 */
MI_ENTRY_POINT(_semsys)
	ARM64_STACK_PROLOG
	PUSH_FRAME
#if __LP64__
	ldp	x1, x2, [fp, #16]
	ldp	x3, x4, [fp, #32]
#else
	ldp	w1, w2, [fp, #16]
	ldp	w3, w4, [fp, #24]
#endif
	MI_CALL_EXTERNAL(___semsys)
	POP_FRAME
	ARM64_STACK_EPILOG

/* 
 * int	semctl(int, int, int, ...);
 * int __semctl(int semid, int semnum, int cmd, semun_t arg);
 */
 MI_ENTRY_POINT(_semctl)
	ARM64_STACK_PROLOG
	PUSH_FRAME
#if __LP64__
	ldr	x3, [fp, #16]
#else
	ldr	w3, [fp, #16]
#endif
	MI_CALL_EXTERNAL(___semctl)
	POP_FRAME
	ARM64_STACK_EPILOG

/* 
 * int	shmsys(int, ...);
 * int __shmsys(int which, int a2, int a3, int a4);
 */
 MI_ENTRY_POINT(_shmsys)
	ARM64_STACK_PROLOG
	PUSH_FRAME
#if __LP64__
	ldp	x1, x2, [fp, #16]
	ldr	x3, [fp, #32]
#else
	ldp	w1, w2, [fp, #16]
	ldr	w3, [fp, #24]
#endif
	MI_CALL_EXTERNAL(___shmsys)
	POP_FRAME
	ARM64_STACK_EPILOG

#endif /* defined(__arm64__) */
Commit	Line	Data
2d21ac55	1	/*
fe8ab488	2	* Copyright (c) 2011-2013 Apple Inc. All rights reserved.
2d21ac55	3	*
fe8ab488	4	* @APPLE_LICENSE_HEADER_START@
2d21ac55 A	5	*
	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
fe8ab488 A	9	* compliance with the License. Please obtain a copy of the License at
	10	* http://www.opensource.apple.com/apsl/ and read it before using this
	11	* file.
2d21ac55 A	12	*
	13	* The Original Code and all software distributed under the License are
	14	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	15	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	16	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	17	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	18	* Please see the License for the specific language governing rights and
	19	* limitations under the License.
	20	*
fe8ab488	21	* @APPLE_LICENSE_HEADER_END@
2d21ac55 A	22	*/
2d21ac55 A	23
5ba3f43e A	24	#ifdef __arm64__
	25
	26	#include "../custom/SYS.h"
	27	#include <mach/arm64/asm.h>
	28
	29	/*
	30	* Stubs are to handle the ARM64 ABI for variadic functions'
	31	* not matching the ABI used by the system call handler.
	32	*/
	33
	34	/*
	35	* sem_t* sem_open(const char *name, int oflag, ...);
	36	* sem_t* __sem_open(const char *name, int oflag, int mode, int value);
	37	*/
	38	MI_ENTRY_POINT(_sem_open)
d9a64523	39	ARM64_STACK_PROLOG
5ba3f43e	40	PUSH_FRAME
d9a64523	41	#if __LP64__
5ba3f43e	42	ldp x2, x3, [fp, #16]
d9a64523 A	43	#else
	44	ldp w2, w3, [fp, #16]
	45	#endif
5ba3f43e	46	MI_CALL_EXTERNAL(___sem_open)
d9a64523 A	47	#if !__LP64__
	48	/* xnu returns a 64-bit '-1' on failure, but pointers must have the high
	49	* 32-bits set to zero. The following instruction is equivalent to
	50	* masking off the top 32-bits.
	51	*/
	52	mov w0, w0
	53	#endif
5ba3f43e	54	POP_FRAME
d9a64523	55	ARM64_STACK_EPILOG
5ba3f43e	56
5ba3f43e A	57	/*
	58	* int shm_open(const char *, int, ...);
	59	* int __shm_open(const char*, int oflag, int mode);
	60	*/
	61	MI_ENTRY_POINT(_shm_open)
d9a64523	62	ARM64_STACK_PROLOG
5ba3f43e	63	PUSH_FRAME
d9a64523 A	64	#if __LP64__
	65	ldr x2, [fp, #16]
	66	#else
	67	ldr w2, [fp, #16]
	68	#endif
5ba3f43e A	69	MI_CALL_EXTERNAL(___shm_open)
5ba3f43e A	70	POP_FRAME
d9a64523	71	ARM64_STACK_EPILOG
5ba3f43e A	72
	73	/*
	74	* int msgsys(int, ...);
	75	* int __msgsys(int which, int a2, int a3, int a4, int a5);
	76	*/
	77	MI_ENTRY_POINT(_msgsys)
d9a64523	78	ARM64_STACK_PROLOG
5ba3f43e	79	PUSH_FRAME
d9a64523 A	80	#if __LP64__
	81	ldp x1, x2, [fp, #16]
	82	ldp x3, x4, [fp, #32]
	83	#else
	84	ldp w1, w2, [fp, #16]
	85	ldp w3, w4, [fp, #24]
	86	#endif
5ba3f43e A	87	MI_CALL_EXTERNAL(___msgsys)
5ba3f43e A	88	POP_FRAME
5ba3f43e A	89
	90	/*
	91	* int semsys(int, ...);
	92	* int __semsys(int which, int a2, int a3, int a4, int a5);
	93	*/
	94	MI_ENTRY_POINT(_semsys)
d9a64523	95	ARM64_STACK_PROLOG
5ba3f43e	96	PUSH_FRAME
d9a64523 A	97	#if __LP64__
	98	ldp x1, x2, [fp, #16]
	99	ldp x3, x4, [fp, #32]
	100	#else
	101	ldp w1, w2, [fp, #16]
	102	ldp w3, w4, [fp, #24]
	103	#endif
5ba3f43e A	104	MI_CALL_EXTERNAL(___semsys)
5ba3f43e A	105	POP_FRAME
d9a64523	106	ARM64_STACK_EPILOG
5ba3f43e A	107
	108	/*
	109	* int semctl(int, int, int, ...);
	110	* int __semctl(int semid, int semnum, int cmd, semun_t arg);
	111	*/
	112	MI_ENTRY_POINT(_semctl)
d9a64523	113	ARM64_STACK_PROLOG
5ba3f43e	114	PUSH_FRAME
d9a64523 A	115	#if __LP64__
	116	ldr x3, [fp, #16]
	117	#else
	118	ldr w3, [fp, #16]
	119	#endif
5ba3f43e A	120	MI_CALL_EXTERNAL(___semctl)
5ba3f43e A	121	POP_FRAME
d9a64523	122	ARM64_STACK_EPILOG
5ba3f43e A	123
	124	/*
	125	* int shmsys(int, ...);
	126	* int __shmsys(int which, int a2, int a3, int a4);
	127	*/
	128	MI_ENTRY_POINT(_shmsys)
d9a64523	129	ARM64_STACK_PROLOG
5ba3f43e	130	PUSH_FRAME
d9a64523 A	131	#if __LP64__
	132	ldp x1, x2, [fp, #16]
	133	ldr x3, [fp, #32]
	134	#else
	135	ldp w1, w2, [fp, #16]
	136	ldr w3, [fp, #24]
	137	#endif
5ba3f43e A	138	MI_CALL_EXTERNAL(___shmsys)
5ba3f43e A	139	POP_FRAME
d9a64523	140	ARM64_STACK_EPILOG
5ba3f43e A	141
5ba3f43e A	142	#endif /* defined(__arm64__) */