[apple/xnu.git] / libsyscall / custom / SYS.h

/*
 * Copyright (c) 1999-2011 Apple Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_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. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * 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_OSREFERENCE_LICENSE_HEADER_END@
 */
/* Copyright (c) 1992 NeXT Computer, Inc.  All rights reserved.
 *
 *	File:	SYS.h
 *
 *	Definition of the user side of the UNIX system call interface
 *	for M98K.
 *
 *	Errors are flagged by the location of the trap return (ie., which
 *	instruction is executed upon rfi):
 *
 *		SC PC + 4:	Error (typically branch to cerror())
 *		SC PC + 8:	Success
 *
 * HISTORY
 * 18-Nov-92	Ben Fathi (benf@next.com)
 *	Ported to m98k.
 *
 *  9-Jan-92	Peter King (king@next.com)
 *	Created.
 */

#include <sys/syscall.h>

#if defined(__i386__)

#include <architecture/i386/asm_help.h>
#include <mach/i386/syscall_sw.h>

/*
 * We have two entry points. int's is used for syscalls which need to preserve
 * %ecx across the call, or return a 64-bit value in %eax:%edx. sysenter is used
 * for the majority of syscalls which just return a value in %eax.
 */

#define UNIX_SYSCALL_SYSENTER		call __sysenter_trap
#define UNIX_SYSCALL(name, nargs)			\
	.globl	tramp_cerror				;\
LEAF(_##name, 0)					;\
	movl	$ SYS_##name, %eax			;\
	UNIX_SYSCALL_SYSENTER				;\
	jnb	2f					;\
	BRANCH_EXTERN(tramp_cerror)  			;\
2:

#define UNIX_SYSCALL_INT(name, nargs)			\
	.globl	tramp_cerror				;\
LEAF(_##name, 0)					;\
	movl	$ SYS_##name, %eax			;\
	UNIX_SYSCALL_TRAP				;\
	jnb	2f					;\
	BRANCH_EXTERN(tramp_cerror)  			;\
2:

#if defined(__SYSCALL_32BIT_ARG_BYTES) && ((__SYSCALL_32BIT_ARG_BYTES >= 4) && (__SYSCALL_32BIT_ARG_BYTES <= 20))
#define UNIX_SYSCALL_NONAME(name, nargs, cerror)			\
	movl	$(SYS_##name | (__SYSCALL_32BIT_ARG_BYTES << I386_SYSCALL_ARG_BYTES_SHIFT)), %eax		;\
	UNIX_SYSCALL_SYSENTER					;\
	jnb	2f						;\
	BRANCH_EXTERN(tramp_##cerror)				;\
2:
#else /* __SYSCALL_32BIT_ARG_BYTES < 4 || > 20 */
#define UNIX_SYSCALL_NONAME(name, nargs, cerror)	\
	movl	$ SYS_##name, %eax			;\
	UNIX_SYSCALL_SYSENTER				;\
	jnb	2f					;\
	BRANCH_EXTERN(tramp_##cerror)			;\
2:
#endif

#define UNIX_SYSCALL_INT_NONAME(name, nargs)		\
	.globl	tramp_cerror_nocancel			;\
	movl	$ SYS_##name, %eax			;\
	UNIX_SYSCALL_TRAP				;\
	jnb	2f					;\
	BRANCH_EXTERN(tramp_cerror_nocancel) 		;\
2:

#define PSEUDO(pseudo, name, nargs, cerror)	\
LEAF(pseudo, 0)					;\
	UNIX_SYSCALL_NONAME(name, nargs, cerror)

#define PSEUDO_INT(pseudo, name, nargs)		\
LEAF(pseudo, 0)					;\
	UNIX_SYSCALL_INT_NONAME(name, nargs)

#define __SYSCALL2(pseudo, name, nargs, cerror)			\
	PSEUDO(pseudo, name, nargs, cerror)			;\
	ret

#define __SYSCALL(pseudo, name, nargs)			\
	PSEUDO(pseudo, name, nargs, cerror)		;\
	ret

#define __SYSCALL_INT(pseudo, name, nargs)		\
	PSEUDO_INT(pseudo, name, nargs)			;\
	ret

#elif defined(__x86_64__)

#include <architecture/i386/asm_help.h>
#include <mach/i386/syscall_sw.h>

#define UNIX_SYSCALL_SYSCALL	\
	movq	%rcx, %r10		;\
	syscall

#define UNIX_SYSCALL(name, nargs)						 \
	.globl	cerror								;\
LEAF(_##name, 0)								;\
	movl	$ SYSCALL_CONSTRUCT_UNIX(SYS_##name), %eax			;\
	UNIX_SYSCALL_SYSCALL							;\
	jnb		2f							;\
	movq	%rax, %rdi							;\
	BRANCH_EXTERN(_cerror)							;\
2:

#define UNIX_SYSCALL_NONAME(name, nargs, cerror)		 \
	.globl	cerror								;\
	movl	$ SYSCALL_CONSTRUCT_UNIX(SYS_##name), %eax			;\
	UNIX_SYSCALL_SYSCALL							;\
	jnb		2f							;\
	movq	%rax, %rdi							;\
	BRANCH_EXTERN(_##cerror)						;\
2:

#define PSEUDO(pseudo, name, nargs, cerror)			\
LEAF(pseudo, 0)					;\
	UNIX_SYSCALL_NONAME(name, nargs, cerror)

#define __SYSCALL2(pseudo, name, nargs, cerror) \
	PSEUDO(pseudo, name, nargs, cerror)			;\
	ret

#define __SYSCALL(pseudo, name, nargs)			\
	PSEUDO(pseudo, name, nargs, cerror)			;\
	ret

#else
#error Unsupported architecture
#endif
Commit	Line	Data
2d21ac55	1	/*
316670eb	2	* Copyright (c) 1999-2011 Apple Inc. All rights reserved.
2d21ac55 A	3	*
	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
	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
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
	14	*
	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
	25	*
	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
	27	*/
	28	/* Copyright (c) 1992 NeXT Computer, Inc. All rights reserved.
	29	*
	30	* File: SYS.h
	31	*
	32	* Definition of the user side of the UNIX system call interface
	33	* for M98K.
	34	*
	35	* Errors are flagged by the location of the trap return (ie., which
	36	* instruction is executed upon rfi):
	37	*
	38	* SC PC + 4: Error (typically branch to cerror())
	39	* SC PC + 8: Success
	40	*
	41	* HISTORY
	42	* 18-Nov-92 Ben Fathi (benf@next.com)
	43	* Ported to m98k.
	44	*
	45	* 9-Jan-92 Peter King (king@next.com)
	46	* Created.
	47	*/
	48
	49	#include <sys/syscall.h>
	50
6d2010ae	51	#if defined(__i386__)
2d21ac55 A	52
	53	#include <architecture/i386/asm_help.h>
	54	#include <mach/i386/syscall_sw.h>
	55
	56	/*
	57	* We have two entry points. int's is used for syscalls which need to preserve
	58	* %ecx across the call, or return a 64-bit value in %eax:%edx. sysenter is used
	59	* for the majority of syscalls which just return a value in %eax.
	60	*/
	61
	62	#define UNIX_SYSCALL_SYSENTER call __sysenter_trap
	63	#define UNIX_SYSCALL(name, nargs) \
39236c6e	64	.globl tramp_cerror ;\
2d21ac55 A	65	LEAF(_##name, 0) ;\
	66	movl $ SYS_##name, %eax ;\
	67	UNIX_SYSCALL_SYSENTER ;\
	68	jnb 2f ;\
39236c6e	69	BRANCH_EXTERN(tramp_cerror) ;\
2d21ac55 A	70	2:
	71
	72	#define UNIX_SYSCALL_INT(name, nargs) \
39236c6e	73	.globl tramp_cerror ;\
2d21ac55 A	74	LEAF(_##name, 0) ;\
	75	movl $ SYS_##name, %eax ;\
	76	UNIX_SYSCALL_TRAP ;\
	77	jnb 2f ;\
39236c6e	78	BRANCH_EXTERN(tramp_cerror) ;\
2d21ac55 A	79	2:
2d21ac55 A	80
4a3eedf9	81	#if defined(__SYSCALL_32BIT_ARG_BYTES) && ((__SYSCALL_32BIT_ARG_BYTES >= 4) && (__SYSCALL_32BIT_ARG_BYTES <= 20))
316670eb	82	#define UNIX_SYSCALL_NONAME(name, nargs, cerror) \
4a3eedf9	83	movl $(SYS_##name \| (__SYSCALL_32BIT_ARG_BYTES << I386_SYSCALL_ARG_BYTES_SHIFT)), %eax ;\
2d21ac55 A	84	UNIX_SYSCALL_SYSENTER ;\
2d21ac55 A	85	jnb 2f ;\
39236c6e	86	BRANCH_EXTERN(tramp_##cerror) ;\
2d21ac55	87	2:
4a3eedf9	88	#else /* __SYSCALL_32BIT_ARG_BYTES < 4 \|\| > 20 */
39236c6e	89	#define UNIX_SYSCALL_NONAME(name, nargs, cerror) \
2d21ac55 A	90	movl $ SYS_##name, %eax ;\
	91	UNIX_SYSCALL_SYSENTER ;\
	92	jnb 2f ;\
39236c6e	93	BRANCH_EXTERN(tramp_##cerror) ;\
2d21ac55 A	94	2:
	95	#endif
	96
	97	#define UNIX_SYSCALL_INT_NONAME(name, nargs) \
39236c6e	98	.globl tramp_cerror_nocancel ;\
2d21ac55 A	99	movl $ SYS_##name, %eax ;\
	100	UNIX_SYSCALL_TRAP ;\
	101	jnb 2f ;\
39236c6e	102	BRANCH_EXTERN(tramp_cerror_nocancel) ;\
2d21ac55 A	103	2:
2d21ac55 A	104
39236c6e	105	#define PSEUDO(pseudo, name, nargs, cerror) \
6d2010ae	106	LEAF(pseudo, 0) ;\
316670eb	107	UNIX_SYSCALL_NONAME(name, nargs, cerror)
2d21ac55	108
39236c6e	109	#define PSEUDO_INT(pseudo, name, nargs) \
6d2010ae	110	LEAF(pseudo, 0) ;\
2d21ac55 A	111	UNIX_SYSCALL_INT_NONAME(name, nargs)
2d21ac55 A	112
316670eb A	113	#define __SYSCALL2(pseudo, name, nargs, cerror) \
	114	PSEUDO(pseudo, name, nargs, cerror) ;\
	115	ret
	116
2d21ac55	117	#define __SYSCALL(pseudo, name, nargs) \
39236c6e	118	PSEUDO(pseudo, name, nargs, cerror) ;\
2d21ac55 A	119	ret
	120
	121	#define __SYSCALL_INT(pseudo, name, nargs) \
	122	PSEUDO_INT(pseudo, name, nargs) ;\
	123	ret
	124
	125	#elif defined(__x86_64__)
	126
	127	#include <architecture/i386/asm_help.h>
	128	#include <mach/i386/syscall_sw.h>
	129
	130	#define UNIX_SYSCALL_SYSCALL \
	131	movq %rcx, %r10 ;\
	132	syscall
	133
39236c6e A	134	#define UNIX_SYSCALL(name, nargs) \
	135	.globl cerror ;\
	136	LEAF(_##name, 0) ;\
	137	movl $ SYSCALL_CONSTRUCT_UNIX(SYS_##name), %eax ;\
	138	UNIX_SYSCALL_SYSCALL ;\
	139	jnb 2f ;\
	140	movq %rax, %rdi ;\
	141	BRANCH_EXTERN(_cerror) ;\
2d21ac55 A	142	2:
2d21ac55 A	143
39236c6e A	144	#define UNIX_SYSCALL_NONAME(name, nargs, cerror) \
	145	.globl cerror ;\
	146	movl $ SYSCALL_CONSTRUCT_UNIX(SYS_##name), %eax ;\
	147	UNIX_SYSCALL_SYSCALL ;\
	148	jnb 2f ;\
	149	movq %rax, %rdi ;\
	150	BRANCH_EXTERN(_##cerror) ;\
2d21ac55 A	151	2:
2d21ac55 A	152
316670eb	153	#define PSEUDO(pseudo, name, nargs, cerror) \
6d2010ae	154	LEAF(pseudo, 0) ;\
316670eb A	155	UNIX_SYSCALL_NONAME(name, nargs, cerror)
	156
	157	#define __SYSCALL2(pseudo, name, nargs, cerror) \
	158	PSEUDO(pseudo, name, nargs, cerror) ;\
	159	ret
2d21ac55 A	160
2d21ac55 A	161	#define __SYSCALL(pseudo, name, nargs) \
316670eb	162	PSEUDO(pseudo, name, nargs, cerror) ;\
2d21ac55 A	163	ret
2d21ac55 A	164
2d21ac55 A	165	#else
	166	#error Unsupported architecture
	167	#endif
316670eb	168