[dragonfly.git] / sys / cpu / x86_64 / include / asm.h

/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * William Jolitz.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	from: @(#)DEFS.h	5.1 (Berkeley) 4/23/90
 * $FreeBSD: src/sys/amd64/include/asm.h,v 1.14 2003/06/02 05:59:35 peter Exp $
 */

#ifndef _CPU_ASM_H_
#define	_CPU_ASM_H_

#include <sys/cdefs.h>

#ifdef PIC
#define	PIC_PLT(x)	x@PLT
#define	PIC_GOT(x)	x@GOTPCREL(%rip)
#else
#define	PIC_PLT(x)	x
#define	PIC_GOT(x)	x
#endif

/*
 * CNAME and HIDENAME manage the relationship between symbol names in C
 * and the equivalent assembly language names.  CNAME is given a name as
 * it would be used in a C program.  It expands to the equivalent assembly
 * language name.  HIDENAME is given an assembly-language name, and expands
 * to a possibly-modified form that will be invisible to C programs.
 */
#define CNAME(csym)		csym
#define HIDENAME(asmsym)	.asmsym

/* XXX should use .p2align 4,0x90 for -m486. */
#define _START_ENTRY	.text; .p2align 2,0x90

#define _ENTRY(x)	_START_ENTRY; \
			.globl CNAME(x); .type CNAME(x),@function; CNAME(x):

#ifdef PROF
#define	ALTENTRY(x)	_ENTRY(x); \
			call PIC_PLT(HIDENAME(mcount)); \
			jmp 9f
#define	ENTRY(x)	_ENTRY(x); \
			call PIC_PLT(HIDENAME(mcount)); \
			9:
#else
#define	ALTENTRY(x)	_ENTRY(x)
#define	ENTRY(x)	_ENTRY(x)
#endif

#define	END(x)		.size x, . - x

#define RCSID(x)	.text; .asciz x

#endif /* !_CPU_ASM_H_ */
Commit	Line	Data
fc3f9779 SS	1	/*-
	2	* Copyright (c) 1990 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* This code is derived from software contributed to Berkeley by
	6	* William Jolitz.
	7	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions
	10	* are met:
	11	* 1. Redistributions of source code must retain the above copyright
	12	* notice, this list of conditions and the following disclaimer.
	13	* 2. Redistributions in binary form must reproduce the above copyright
	14	* notice, this list of conditions and the following disclaimer in the
	15	* documentation and/or other materials provided with the distribution.
	16	* 3. All advertising materials mentioning features or use of this software
	17	* must display the following acknowledgement:
	18	* This product includes software developed by the University of
	19	* California, Berkeley and its contributors.
	20	* 4. Neither the name of the University nor the names of its contributors
	21	* may be used to endorse or promote products derived from this software
	22	* without specific prior written permission.
	23	*
	24	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	25	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	26	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	27	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	28	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	29	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	30	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	31	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	32	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	33	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	34	* SUCH DAMAGE.
	35	*
	36	* from: @(#)DEFS.h 5.1 (Berkeley) 4/23/90
	37	* $FreeBSD: src/sys/amd64/include/asm.h,v 1.14 2003/06/02 05:59:35 peter Exp $
fc3f9779 SS	38	*/
	39
	40	#ifndef _CPU_ASM_H_
	41	#define _CPU_ASM_H_
	42
	43	#include <sys/cdefs.h>
	44
	45	#ifdef PIC
	46	#define PIC_PLT(x) x@PLT
	47	#define PIC_GOT(x) x@GOTPCREL(%rip)
	48	#else
	49	#define PIC_PLT(x) x
	50	#define PIC_GOT(x) x
	51	#endif
	52
	53	/*
	54	* CNAME and HIDENAME manage the relationship between symbol names in C
	55	* and the equivalent assembly language names. CNAME is given a name as
	56	* it would be used in a C program. It expands to the equivalent assembly
	57	* language name. HIDENAME is given an assembly-language name, and expands
	58	* to a possibly-modified form that will be invisible to C programs.
	59	*/
	60	#define CNAME(csym) csym
	61	#define HIDENAME(asmsym) .asmsym
	62
	63	/* XXX should use .p2align 4,0x90 for -m486. */
	64	#define _START_ENTRY .text; .p2align 2,0x90
	65
	66	#define _ENTRY(x) _START_ENTRY; \
	67	.globl CNAME(x); .type CNAME(x),@function; CNAME(x):
	68
	69	#ifdef PROF
	70	#define ALTENTRY(x) _ENTRY(x); \
	71	call PIC_PLT(HIDENAME(mcount)); \
	72	jmp 9f
	73	#define ENTRY(x) _ENTRY(x); \
	74	call PIC_PLT(HIDENAME(mcount)); \
	75	9:
	76	#else
	77	#define ALTENTRY(x) _ENTRY(x)
	78	#define ENTRY(x) _ENTRY(x)
	79	#endif
	80
ea2bc245 PA	81	#define END(x) .size x, . - x
ea2bc245 PA	82
fc3f9779 SS	83	#define RCSID(x) .text; .asciz x
	84
	85	#endif /* !_CPU_ASM_H_ */