224 lines
5.9 KiB
C
224 lines
5.9 KiB
C
/* $NetBSD: asm.h,v 1.39 2010/12/20 21:11:24 joerg Exp $ */
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)asm.h 5.5 (Berkeley) 5/7/91
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*/
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#ifndef _I386_ASM_H_
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#define _I386_ASM_H_
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#ifdef _KERNEL_OPT
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#include "opt_multiprocessor.h"
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#endif
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#ifdef PIC
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#define PIC_PROLOGUE \
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pushl %ebx; \
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call 1f; \
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1: \
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popl %ebx; \
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addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %ebx
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#define PIC_EPILOGUE \
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popl %ebx
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#define PIC_PLT(x) x@PLT
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#define PIC_GOT(x) x@GOT(%ebx)
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#define PIC_GOTOFF(x) x@GOTOFF(%ebx)
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#else
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#define PIC_PROLOGUE
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#define PIC_EPILOGUE
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#define PIC_PLT(x) x
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#define PIC_GOT(x) x
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#define PIC_GOTOFF(x) x
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#endif
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#ifdef __ELF__
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# define _C_LABEL(x) x
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#else
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# ifdef __STDC__
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# define _C_LABEL(x) _ ## x
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# else
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# define _C_LABEL(x) _/**/x
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# endif
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#endif
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#define _ASM_LABEL(x) x
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#define CVAROFF(x, y) _C_LABEL(x) + y
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#ifdef __STDC__
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# define __CONCAT(x,y) x ## y
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# define __STRING(x) #x
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#else
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# define __CONCAT(x,y) x/**/y
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# define __STRING(x) "x"
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#endif
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/* let kernels and others override entrypoint alignment */
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#if !defined(_ALIGN_TEXT) && !defined(_KERNEL)
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# ifdef _STANDALONE
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# define _ALIGN_TEXT .align 4
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# elif defined __ELF__
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# define _ALIGN_TEXT .align 16
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# else
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# define _ALIGN_TEXT .align 4
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# endif
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#endif
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#define _ENTRY(x) \
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.text; _ALIGN_TEXT; .globl x; .type x,@function; x:
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#define _LABEL(x) \
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.globl x; x:
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#ifdef _KERNEL
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#define CPUVAR(off) %fs:__CONCAT(CPU_INFO_,off)
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/* XXX Can't use __CONCAT() here, as it would be evaluated incorrectly. */
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#ifdef __ELF__
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#ifdef __STDC__
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#define IDTVEC(name) \
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ALIGN_TEXT; .globl X ## name; .type X ## name,@function; X ## name:
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#define IDTVEC_END(name) \
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.size X ## name, . - X ## name
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#else
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#define IDTVEC(name) \
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ALIGN_TEXT; .globl X/**/name; .type X/**/name,@function; X/**/name:
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#define IDTVEC_END(name) \
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.size X/**/name, . - X/**/name
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#endif /* __STDC__ */
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#else
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#ifdef __STDC__
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#define IDTVEC(name) \
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ALIGN_TEXT; .globl _X ## name; .type _X ## name,@function; _X ## name:
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#define IDTVEC_END(name) \
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.size _X ## name, . - _X ## name
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#else
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#define IDTVEC(name) \
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ALIGN_TEXT; .globl _X/**/name; .type _X/**/name,@function; _X/**/name:
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#define IDTVEC_END(name) \
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.size _X/**/name, . - _X/**/name
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#endif /* __STDC__ */
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#endif /* __ELF__ */
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#ifdef _STANDALONE
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#define ALIGN_DATA .align 4
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#define ALIGN_TEXT .align 4 /* 4-byte boundaries */
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#define SUPERALIGN_TEXT .align 16 /* 15-byte boundaries */
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#elif defined __ELF__
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#define ALIGN_DATA .align 4
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#define ALIGN_TEXT .align 16 /* 16-byte boundaries */
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#define SUPERALIGN_TEXT .align 16 /* 16-byte boundaries */
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#else
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#define ALIGN_DATA .align 2
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#define ALIGN_TEXT .align 4 /* 16-byte boundaries */
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#define SUPERALIGN_TEXT .align 4 /* 16-byte boundaries */
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#endif /* __ELF__ */
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#define _ALIGN_TEXT ALIGN_TEXT
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#ifdef GPROF
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#ifdef __ELF__
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#define MCOUNT_ASM call _C_LABEL(__mcount)
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#else /* __ELF__ */
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#define MCOUNT_ASM call _C_LABEL(mcount)
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#endif /* __ELF__ */
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#else /* GPROF */
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#define MCOUNT_ASM /* nothing */
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#endif /* GPROF */
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#endif /* _KERNEL */
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#ifdef GPROF
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# ifdef __ELF__
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# define _PROF_PROLOGUE \
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pushl %ebp; movl %esp,%ebp; call PIC_PLT(__mcount); popl %ebp
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# else
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# define _PROF_PROLOGUE \
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pushl %ebp; movl %esp,%ebp; call PIC_PLT(mcount); popl %ebp
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# endif
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#else
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# define _PROF_PROLOGUE
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#endif
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#define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE
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#define NENTRY(y) _ENTRY(_C_LABEL(y))
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#define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
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#define LABEL(y) _LABEL(_C_LABEL(y))
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#define END(y) .size y, . - y
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#define ASMSTR .asciz
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#ifdef __ELF__
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#define RCSID(x) .pushsection ".ident"; .asciz x; .popsection
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#else
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#define RCSID(x) .text; .asciz x
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#endif
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#ifdef NO_KERNEL_RCSIDS
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#define __KERNEL_RCSID(_n, _s) /* nothing */
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#else
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#define __KERNEL_RCSID(_n, _s) RCSID(_s)
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#endif
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#if defined(__ELF__) || defined(__minix)
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#define WEAK_ALIAS(alias,sym) \
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.weak alias; \
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alias = sym
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#endif
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/*
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* STRONG_ALIAS: create a strong alias.
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*/
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#define STRONG_ALIAS(alias,sym) \
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.globl alias; \
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alias = sym
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#ifdef __STDC__
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#define WARN_REFERENCES(sym,msg) \
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.pushsection .gnu.warning. ## sym; \
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.ascii msg; \
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.popsection
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#else
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#define WARN_REFERENCES(sym,msg) \
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.pushsection .gnu.warning./**/sym; \
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.ascii msg; \
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.popsection
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#endif /* __STDC__ */
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#ifdef __minix
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#define IMPORT(sym) \
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.extern _C_LABEL(sym)
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#endif
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#endif /* !_I386_ASM_H_ */
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