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/* $OpenBSD: asm.h,v 1.2 2017/06/23 09:55:10 mpi Exp $ */
/* $NetBSD: asm.h,v 1.4 2001/07/16 05:43:32 matt Exp $ */
/*
* 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. 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: @(#)asm.h 5.5 (Berkeley) 5/7/91
*/
#ifndef _MACHINE_ASM_H_
#define _MACHINE_ASM_H_
#ifdef __ELF__
# define _C_LABEL(x) x
#else
# ifdef __STDC__
# define _C_LABEL(x) _ ## x
# else
# define _C_LABEL(x) _/**/x
# endif
#endif
#define _ASM_LABEL(x) x
#ifdef __STDC__
# define __CONCAT(x,y) x ## y
# define __STRING(x) #x
#else
# define __CONCAT(x,y) x/**/y
# define __STRING(x) "x"
#endif
#ifndef _ALIGN_TEXT
# define _ALIGN_TEXT .align 0
#endif
/*
* gas/arm uses @ as a single comment character and thus cannot be used here
* Instead it recognised the # instead of an @ symbols in .type directives
* We define a couple of macros so that assembly code will not be dependant
* on one or the other.
*/
#define _ASM_TYPE_FUNCTION #function
#define _ASM_TYPE_OBJECT #object
#define _ENTRY(x) \
.text; _ALIGN_TEXT; .globl x; .type x,_ASM_TYPE_FUNCTION; x:
#if defined(PROF) || defined(GPROF)
# define _PROF_PROLOGUE \
stp x29, x30, [sp, #-16]!; \
mov fp, sp; \
bl __mcount; \
ldp x29, x30, [sp], #16;
#else
# define _PROF_PROLOGUE
#endif
#define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE
#define ENTRY_NP(y) _ENTRY(_C_LABEL(y))
#define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
#define ASENTRY_NP(y) _ENTRY(_ASM_LABEL(y))
#define END(y) .size y, . - y
#define EENTRY(sym) .globl sym; sym:
#define EEND(sym)
#define ASMSTR .asciz
#if defined(__ELF__) && defined(__PIC__)
#ifdef __STDC__
#define PIC_SYM(x,y) x ## ( ## y ## )
#else
#define PIC_SYM(x,y) x/**/(/**/y/**/)
#endif
#else
#define PIC_SYM(x,y) x
#endif
#ifdef __ELF__
#define RCSID(x) .section ".ident"; .asciz x
#else
#define RCSID(x) .text; .asciz x
#endif
#ifdef __ELF__
#define STRONG_ALIAS(alias,sym) \
.global alias; \
alias = sym
#define WEAK_ALIAS(alias,sym) \
.weak alias; \
alias = sym
#endif
#ifdef __STDC__
#define WARN_REFERENCES(sym,msg) \
.stabs msg ## ,30,0,0,0 ; \
.stabs __STRING(_C_LABEL(sym)) ## ,1,0,0,0
#elif defined(__ELF__)
#define WARN_REFERENCES(sym,msg) \
.stabs msg,30,0,0,0 ; \
.stabs __STRING(sym),1,0,0,0
#else
#define WARN_REFERENCES(sym,msg) \
.stabs msg,30,0,0,0 ; \
.stabs __STRING(_/**/sym),1,0,0,0
#endif /* __STDC__ */
/*
* Sets the trap fault handler. The exception handler will return to the
* address in the handler register on a data abort or the xzr register to
* clear the handler. The tmp parameter should be a register able to hold
* the temporary data.
*/
#define SET_FAULT_HANDLER(handler, tmp) \
ldr tmp, [x18, #CI_CURPCB]; /* Load the pcb */ \
str handler, [tmp, #PCB_ONFAULT] /* Set the handler */
#endif /* !_MACHINE_ASM_H_ */
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