[apple/libc.git] / ppc / sys / SYS.h

/*
 * Copyright (c) 1999-2004 Apple Computer, 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@
 */
/* 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.
 */

/*
 * Header files.
 */
#include <architecture/ppc/mode_independent_asm.h>
#import	<sys/syscall.h>

/* From rhapsody kernel mach/ppc/syscall_sw.h */
#define	kernel_trap_args_0
#define	kernel_trap_args_1
#define	kernel_trap_args_2
#define	kernel_trap_args_3
#define	kernel_trap_args_4
#define	kernel_trap_args_5
#define	kernel_trap_args_6
#define	kernel_trap_args_7

/*
 * simple_kernel_trap -- Mach system calls with 8 or less args
 * Args are passed in a0 - a7, system call number in r0.
 * Do a "sc" instruction to enter kernel.
 */	
#define simple_kernel_trap(trap_name, trap_number)	\
	.globl	_##trap_name				@\
_##trap_name:						@\
	li	r0,trap_number				 @\
	sc						 @\
	blr

#define kernel_trap_0(trap_name,trap_number)		 \
	simple_kernel_trap(trap_name,trap_number)

#define kernel_trap_1(trap_name,trap_number)		 \
	simple_kernel_trap(trap_name,trap_number)

#define kernel_trap_2(trap_name,trap_number)		 \
	simple_kernel_trap(trap_name,trap_number)

#define kernel_trap_3(trap_name,trap_number)		 \
	simple_kernel_trap(trap_name,trap_number)

#define kernel_trap_4(trap_name,trap_number)		 \
	simple_kernel_trap(trap_name,trap_number)

#define kernel_trap_5(trap_name,trap_number)		 \
	simple_kernel_trap(trap_name,trap_number)

#define kernel_trap_6(trap_name,trap_number)		 \
	simple_kernel_trap(trap_name,trap_number)

#define kernel_trap_7(trap_name,trap_number)		 \
	simple_kernel_trap(trap_name,trap_number)

#define kernel_trap_8(trap_name,trap_number)		 \
        simple_kernel_trap(trap_name,trap_number)

#define kernel_trap_9(trap_name,trap_number)		 \
        simple_kernel_trap(trap_name,trap_number)

/* End of rhapsody kernel mach/ppc/syscall_sw.h */

/*
 * Macros.
 */

/*
 * This is the same as SYSCALL, but it can call an alternate error
 * return function.  It's generic to support potential future callers.
 */
#define	SYSCALL_ERR(name, nargs, error_ret)		\
	.globl	error_ret			@\
    MI_ENTRY_POINT(_##name)     @\
	kernel_trap_args_##nargs    @\
	li	r0,SYS_##name			@\
	sc                          @\
	b	1f                      @\
	blr                         @\
1:	MI_BRANCH_EXTERNAL(error_ret)

#define	SYSCALL(name, nargs)			\
	.globl	cerror				@\
    MI_ENTRY_POINT(_##name)     @\
	kernel_trap_args_##nargs    @\
	li	r0,SYS_##name			@\
	sc                          @\
	b	1f                      @\
	blr                         @\
1:	MI_BRANCH_EXTERNAL(cerror)


#define	SYSCALL_NONAME(name, nargs)		\
	.globl	cerror				@\
	kernel_trap_args_##nargs    @\
	li	r0,SYS_##name			@\
	sc                          @\
	b	1f                      @\
	b	2f                      @\
1:	MI_BRANCH_EXTERNAL(cerror)  @\
2:


#define	PSEUDO(pseudo, name, nargs)		\
    .globl  _##pseudo           @\
    .text                       @\
    .align  2                   @\
_##pseudo:                      @\
	SYSCALL_NONAME(name, nargs)

#define	PSEUDO_ERR(pseudo, name, nargs, error_ret)		\
    .globl  _##pseudo           @\
	.globl	error_ret			@\
    .text                       @\
    .align  2                   @\
_##pseudo:                      @\
	kernel_trap_args_##nargs    @\
	li	r0,SYS_##name			@\
	sc                          @\
	b	1f                      @\
	blr                         @\
1:	MI_BRANCH_EXTERNAL(error_ret)


#undef END
#import	<mach/ppc/syscall_sw.h>
Commit	Line	Data
e9ce8d39	1	/*
59e0d9fe	2	* Copyright (c) 1999-2004 Apple Computer, Inc. All rights reserved.
e9ce8d39 A	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
734aad71 A	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. Please obtain a copy of the License at
	10	* http://www.opensource.apple.com/apsl/ and read it before using this
	11	* file.
	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
e9ce8d39 A	15	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
e9ce8d39 A	16	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
734aad71 A	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.
e9ce8d39 A	20	*
	21	* @APPLE_LICENSE_HEADER_END@
	22	*/
	23	/* Copyright (c) 1992 NeXT Computer, Inc. All rights reserved.
	24	*
	25	* File: SYS.h
	26	*
	27	* Definition of the user side of the UNIX system call interface
	28	* for M98K.
	29	*
	30	* Errors are flagged by the location of the trap return (ie., which
	31	* instruction is executed upon rfi):
	32	*
	33	* SC PC + 4: Error (typically branch to cerror())
	34	* SC PC + 8: Success
	35	*
	36	* HISTORY
	37	* 18-Nov-92 Ben Fathi (benf@next.com)
	38	* Ported to m98k.
	39	*
	40	* 9-Jan-92 Peter King (king@next.com)
	41	* Created.
	42	*/
	43
e9ce8d39 A	44	/*
	45	* Header files.
	46	*/
59e0d9fe	47	#include <architecture/ppc/mode_independent_asm.h>
e9ce8d39 A	48	#import <sys/syscall.h>
	49
	50	/* From rhapsody kernel mach/ppc/syscall_sw.h */
	51	#define kernel_trap_args_0
	52	#define kernel_trap_args_1
	53	#define kernel_trap_args_2
	54	#define kernel_trap_args_3
	55	#define kernel_trap_args_4
	56	#define kernel_trap_args_5
	57	#define kernel_trap_args_6
	58	#define kernel_trap_args_7
	59
	60	/*
	61	* simple_kernel_trap -- Mach system calls with 8 or less args
	62	* Args are passed in a0 - a7, system call number in r0.
	63	* Do a "sc" instruction to enter kernel.
	64	*/
	65	#define simple_kernel_trap(trap_name, trap_number) \
	66	.globl _##trap_name @\
	67	_##trap_name: @\
	68	li r0,trap_number @\
	69	sc @\
59e0d9fe	70	blr
e9ce8d39 A	71
	72	#define kernel_trap_0(trap_name,trap_number) \
	73	simple_kernel_trap(trap_name,trap_number)
	74
	75	#define kernel_trap_1(trap_name,trap_number) \
	76	simple_kernel_trap(trap_name,trap_number)
	77
	78	#define kernel_trap_2(trap_name,trap_number) \
	79	simple_kernel_trap(trap_name,trap_number)
	80
	81	#define kernel_trap_3(trap_name,trap_number) \
	82	simple_kernel_trap(trap_name,trap_number)
	83
	84	#define kernel_trap_4(trap_name,trap_number) \
	85	simple_kernel_trap(trap_name,trap_number)
	86
	87	#define kernel_trap_5(trap_name,trap_number) \
	88	simple_kernel_trap(trap_name,trap_number)
	89
	90	#define kernel_trap_6(trap_name,trap_number) \
	91	simple_kernel_trap(trap_name,trap_number)
	92
	93	#define kernel_trap_7(trap_name,trap_number) \
	94	simple_kernel_trap(trap_name,trap_number)
	95
	96	#define kernel_trap_8(trap_name,trap_number) \
	97	simple_kernel_trap(trap_name,trap_number)
	98
	99	#define kernel_trap_9(trap_name,trap_number) \
	100	simple_kernel_trap(trap_name,trap_number)
	101
	102	/* End of rhapsody kernel mach/ppc/syscall_sw.h */
	103
	104	/*
	105	* Macros.
	106	*/
	107
3d9156a7 A	108	/*
	109	* This is the same as SYSCALL, but it can call an alternate error
	110	* return function. It's generic to support potential future callers.
	111	*/
	112	#define SYSCALL_ERR(name, nargs, error_ret) \
	113	.globl error_ret @\
	114	MI_ENTRY_POINT(_##name) @\
	115	kernel_trap_args_##nargs @\
	116	li r0,SYS_##name @\
	117	sc @\
	118	b 1f @\
	119	blr @\
	120	1: MI_BRANCH_EXTERNAL(error_ret)
	121
e9ce8d39 A	122	#define SYSCALL(name, nargs) \
e9ce8d39 A	123	.globl cerror @\
59e0d9fe A	124	MI_ENTRY_POINT(_##name) @\
59e0d9fe A	125	kernel_trap_args_##nargs @\
e9ce8d39	126	li r0,SYS_##name @\
59e0d9fe A	127	sc @\
	128	b 1f @\
	129	blr @\
	130	1: MI_BRANCH_EXTERNAL(cerror)
	131
e9ce8d39 A	132
	133	#define SYSCALL_NONAME(name, nargs) \
	134	.globl cerror @\
59e0d9fe	135	kernel_trap_args_##nargs @\
e9ce8d39	136	li r0,SYS_##name @\
59e0d9fe A	137	sc @\
	138	b 1f @\
	139	b 2f @\
	140	1: MI_BRANCH_EXTERNAL(cerror) @\
	141	2:
	142
e9ce8d39 A	143
e9ce8d39 A	144	#define PSEUDO(pseudo, name, nargs) \
59e0d9fe A	145	.globl _##pseudo @\
	146	.text @\
	147	.align 2 @\
	148	_##pseudo: @\
e9ce8d39 A	149	SYSCALL_NONAME(name, nargs)
e9ce8d39 A	150
224c7076 A	151	#define PSEUDO_ERR(pseudo, name, nargs, error_ret) \
	152	.globl _##pseudo @\
	153	.globl error_ret @\
	154	.text @\
	155	.align 2 @\
	156	_##pseudo: @\
	157	kernel_trap_args_##nargs @\
	158	li r0,SYS_##name @\
	159	sc @\
	160	b 1f @\
	161	blr @\
	162	1: MI_BRANCH_EXTERNAL(error_ret)
	163
e9ce8d39 A	164
	165	#undef END
	166	#import <mach/ppc/syscall_sw.h>