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/* $OpenBSD: asm.h,v 1.16 2018/04/11 15:44:08 bluhm Exp $ */
/* $NetBSD: asm.h,v 1.7 1994/10/27 04:15:56 cgd 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.
*
* @(#)asm.h 5.5 (Berkeley) 5/7/91
*/
#ifndef _MACHINE_ASM_H_
#define _MACHINE_ASM_H_
#ifdef __PIC__
#define PIC_PROLOGUE \
pushl %ebx; \
call 666f; \
666: \
popl %ebx; \
addl $_C_LABEL(_GLOBAL_OFFSET_TABLE_)+[.-666b], %ebx
#define PIC_EPILOGUE \
popl %ebx
#define PIC_PLT(x) x@PLT
#define PIC_GOT(x) x@GOT(%ebx)
#define PIC_GOTOFF(x) x@GOTOFF(%ebx)
#else
#define PIC_PROLOGUE
#define PIC_EPILOGUE
#define PIC_PLT(x) x
#define PIC_GOT(x) x
#define PIC_GOTOFF(x) x
#endif
#define _C_LABEL(name) name
#define _ASM_LABEL(x) x
#define CVAROFF(x, y) _C_LABEL(x) + y
#ifdef __STDC__
# define __CONCAT(x,y) x ## y
# define __STRING(x) #x
#else
# define __CONCAT(x,y) x/**/y
# define __STRING(x) "x"
#endif
/*
* STRONG_ALIAS, WEAK_ALIAS
* Create a strong or weak alias.
*/
#define STRONG_ALIAS(alias,sym) \
.global alias; \
alias = sym
#define WEAK_ALIAS(alias,sym) \
.weak alias; \
alias = sym
/*
* WARN_REFERENCES: create a warning if the specified symbol is referenced
*/
#define WARN_REFERENCES(_sym,_msg) \
.section .gnu.warning. ## _sym ; .ascii _msg ; .text
/* let kernels and others override entrypoint alignment */
#ifndef _ALIGN_TEXT
# define _ALIGN_TEXT .align 2, 0x90
#endif
#define _ENTRY(x) \
.text; _ALIGN_TEXT; .globl x; .type x,@function; x:
#ifdef _KERNEL
#define KUTEXT .section .kutext, "ax"
#define IDTVEC(name) \
KUTEXT; ALIGN_TEXT; \
.globl X##name; X##name:
#define KIDTVEC(name) \
.text; ALIGN_TEXT; \
.globl X##name; X##name:
#define KUENTRY(x) \
KUTEXT; _ALIGN_TEXT; .globl x; .type x,@function; x:
#endif /* _KERNEL */
#if defined(PROF) || defined(GPROF)
# define _PROF_PROLOGUE \
pushl %ebp; movl %esp,%ebp; call PIC_PLT(mcount); popl %ebp
#else
# define _PROF_PROLOGUE
#endif
#define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE
#define NENTRY(y) _ENTRY(_C_LABEL(y))
#define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
#define NASENTRY(y) _ENTRY(_ASM_LABEL(y))
#define END(y) .size y, . - y
#define ALTENTRY(name) .globl _C_LABEL(name); _C_LABEL(name):
#ifdef _KERNEL
#define CPUVAR(var) %fs:__CONCAT(CPU_INFO_,var)
#endif /* _KERNEL */
#endif /* !_MACHINE_ASM_H_ */
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