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/* $OpenBSD: asm.h,v 1.8 2007/11/24 20:58:26 deraadt Exp $ */
/* $NetBSD: asm.h,v 1.13 1997/04/24 22:49:39 thorpej Exp $ */
/*
* Copyright (c) 1997 Jason R. Thorpe. All rights reserved.
* Copyright (c) 1994 Allen Briggs
* All rights reserved.
*
* Gleaned from locore.s and sun3 asm.h which had the following copyrights:
* locore.s:
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1982, 1990 The Regents of the University of California.
* sun3/include/asm.h:
* Copyright (c) 1993 Adam Glass
* Copyright (c) 1990 The Regents of the University of California.
*
* 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. 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.
*/
#ifndef _ASM_H_
#define _ASM_H_
#ifdef __ELF__
#define _C_LABEL(name) name
#else
#ifdef __STDC__
#define _C_LABEL(name) _ ## name
#else
#define _C_LABEL(name) _/**/name
#endif /* __STDC__ */
#endif
#define _ASM_LABEL(name) name
#ifndef _KERNEL
#define _ENTRY(name) \
.text; .even; .globl name; .type name,@function; name:
#else
#define _ENTRY(name) \
.text; .even; .globl name; name:
#endif
#ifdef GPROF
#define _PROF_PROLOG link a6,#0; jbsr mcount; unlk a6
#else
#define _PROF_PROLOG
#endif
#define ENTRY(name) _ENTRY(_C_LABEL(name)) _PROF_PROLOG
#define ASENTRY(name) _ENTRY(_ASM_LABEL(name)) _PROF_PROLOG
#define ENTRY_NOPROFILE(name) _ENTRY(_C_LABEL(name))
#define ASENTRY_NOPROFILE(name) _ENTRY(_ASM_LABEL(name))
/*
* The m68k ALTENTRY macro is very different than the traditional
* implementation used by other OpenBSD ports. Usually ALTENTRY
* simply provides an alternate function entry point. The m68k
* definition takes a second argument and jumps inside the second
* function when profiling is enabled.
*
* The m68k behavior is similar to the ENTRY2 macro found in
* solaris' asm_linkage.h.
*
* Providing ENTRY2 and changing all the code that uses ALTENTRY
* to use it would be a desirable change.
*/
#ifdef PROF
#define ALTENTRY(name, rname) ENTRY(name); jra _C_LABEL(rname)+12
#else
#define ALTENTRY(name, rname) _ENTRY(_C_LABEL(name))
#endif
#define RCSID(x) .text ; \
.asciz x ; \
.even
#ifdef __ELF__
#define WEAK_ALIAS(alias,sym) \
.weak alias; \
alias = sym
#else
#ifdef __STDC__
#define WEAK_ALIAS(alias,sym) \
.weak _##alias; \
_##alias = _##sym
#else
#define WEAK_ALIAS(alias,sym) \
.weak _/**/alias; \
_/**/alias = _/**/sym
#endif
#endif
/*
* Global variables of whatever sort.
*/
#define GLOBAL(x) \
.globl _C_LABEL(x) ; \
_C_LABEL(x):
#define ASGLOBAL(x) \
.globl _ASM_LABEL(x) ; \
_ASM_LABEL(x):
/*
* ...and local variables.
*/
#define LOCAL(x) \
_C_LABEL(x):
#define ASLOCAL(x) \
_ASM_LABEL(x):
/*
* Items in the BSS segment.
*/
#define BSS(name, size) \
.comm _C_LABEL(name),size
#define ASBSS(name, size) \
.comm _ASM_LABEL(name),size
#ifdef _KERNEL
/*
* Shorthand for calling panic().
* Note the side-effect: it uses up the 9: label, so be careful!
*/
#define PANIC(x) \
pea 9f ; \
jbsr _C_LABEL(panic) ; \
9: .asciz x ; \
.even
/*
* Shorthand for defining vectors for the vector table.
*/
#define VECTOR(x) \
.long _C_LABEL(x)
#define ASVECTOR(x) \
.long _ASM_LABEL(x)
#define VECTOR_UNUSED \
.long 0
#define CURPROC _C_LABEL(cpu_info_store) + CI_CURPROC
#endif /* _KERNEL */
#endif /* _ASM_H_ */
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