/* $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_ */ |