audk/StdLib/Include/Ia32/machine/asm.h

209 lines
5.7 KiB
C

/* $NetBSD: asm.h,v 1.30 2006/01/20 22:02:40 christos 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 _I386_ASM_H_
#define _I386_ASM_H_
#ifdef _KERNEL_OPT
#include "opt_multiprocessor.h"
#endif
#ifdef PIC
#define PIC_PROLOGUE \
pushl %ebx; \
call 1f; \
1: \
popl %ebx; \
addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %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
#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
#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
/* let kernels and others override entrypoint alignment */
#if !defined(_ALIGN_TEXT) && !defined(_KERNEL)
# ifdef __ELF__
# define _ALIGN_TEXT .align 4
# else
# define _ALIGN_TEXT .align 2
# endif
#endif
#define _ENTRY(x) \
.text; _ALIGN_TEXT; .globl x; .type x,@function; x:
#ifdef _KERNEL
#if defined(MULTIPROCESSOR)
#define CPUVAR(off) %fs:__CONCAT(CPU_INFO_,off)
#else
#define CPUVAR(off) _C_LABEL(cpu_info_primary)+__CONCAT(CPU_INFO_,off)
#endif /* MULTIPROCESSOR */
/* XXX Can't use __CONCAT() here, as it would be evaluated incorrectly. */
#ifdef __ELF__
#ifdef __STDC__
#define IDTVEC(name) \
ALIGN_TEXT; .globl X ## name; .type X ## name,@function; X ## name:
#else
#define IDTVEC(name) \
ALIGN_TEXT; .globl X/**/name; .type X/**/name,@function; X/**/name:
#endif /* __STDC__ */
#else
#ifdef __STDC__
#define IDTVEC(name) \
ALIGN_TEXT; .globl _X ## name; .type _X ## name,@function; _X ## name:
#else
#define IDTVEC(name) \
ALIGN_TEXT; .globl _X/**/name; .type _X/**/name,@function; _X/**/name:
#endif /* __STDC__ */
#endif /* __ELF__ */
#ifdef __ELF__
#define ALIGN_DATA .align 4
#define ALIGN_TEXT .align 4,0x90 /* 4-byte boundaries, NOP-filled */
#define SUPERALIGN_TEXT .align 16,0x90 /* 16-byte boundaries better for 486 */
#else
#define ALIGN_DATA .align 2
#define ALIGN_TEXT .align 2,0x90 /* 4-byte boundaries, NOP-filled */
#define SUPERALIGN_TEXT .align 4,0x90 /* 16-byte boundaries better for 486 */
#endif /* __ELF__ */
#define _ALIGN_TEXT ALIGN_TEXT
#ifdef GPROF
#ifdef __ELF__
#define MCOUNT_ASM call _C_LABEL(__mcount)
#else /* __ELF__ */
#define MCOUNT_ASM call _C_LABEL(mcount)
#endif /* __ELF__ */
#else /* GPROF */
#define MCOUNT_ASM /* nothing */
#endif /* GPROF */
#endif /* _KERNEL */
#ifdef GPROF
# ifdef __ELF__
# define _PROF_PROLOGUE \
pushl %ebp; movl %esp,%ebp; call PIC_PLT(__mcount); popl %ebp
# else
# define _PROF_PROLOGUE \
pushl %ebp; movl %esp,%ebp; call PIC_PLT(mcount); popl %ebp
# endif
#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 ASMSTR .asciz
#ifdef __ELF__
#define RCSID(x) .section ".ident"; .asciz x
#else
#define RCSID(x) .text; .asciz x
#endif
#ifdef NO_KERNEL_RCSIDS
#define __KERNEL_RCSID(_n, _s) /* nothing */
#else
#define __KERNEL_RCSID(_n, _s) RCSID(_s)
#endif
#ifdef __ELF__
#define WEAK_ALIAS(alias,sym) \
.weak alias; \
alias = sym
#endif
/*
* STRONG_ALIAS: create a strong alias.
*/
#define STRONG_ALIAS(alias,sym) \
.globl alias; \
alias = sym
#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__ */
#endif /* !_I386_ASM_H_ */