/* $NetBSD: asm.h,v 1.42 2016/05/15 15:26:04 chs 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 _STANDALONE # define _ALIGN_TEXT .align 1 # elif defined __ELF__ # define _ALIGN_TEXT .align 16 # else # define _ALIGN_TEXT .align 4 # endif #endif #define _ENTRY(x) \ .text; _ALIGN_TEXT; .globl x; .type x,@function; x: #define _LABEL(x) \ .globl x; x: #ifdef _KERNEL #define CPUVAR(off) %fs:__CONCAT(CPU_INFO_,off) /* 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: #define IDTVEC_END(name) \ .size X ## name, . - X ## name #else #define IDTVEC(name) \ ALIGN_TEXT; .globl X/**/name; .type X/**/name,@function; X/**/name: #define IDTVEC_END(name) \ .size X/**/name, . - X/**/name #endif /* __STDC__ */ #else #ifdef __STDC__ #define IDTVEC(name) \ ALIGN_TEXT; .globl _X ## name; .type _X ## name,@function; _X ## name: #define IDTVEC_END(name) \ .size _X ## name, . - _X ## name #else #define IDTVEC(name) \ ALIGN_TEXT; .globl _X/**/name; .type _X/**/name,@function; _X/**/name: #define IDTVEC_END(name) \ .size _X/**/name, . - _X/**/name #endif /* __STDC__ */ #endif /* __ELF__ */ #ifdef _STANDALONE #define ALIGN_DATA .align 4 #define ALIGN_TEXT .align 4 /* 4-byte boundaries */ #define SUPERALIGN_TEXT .align 16 /* 15-byte boundaries */ #elif defined __ELF__ #define ALIGN_DATA .align 4 #define ALIGN_TEXT .align 16 /* 16-byte boundaries */ #define SUPERALIGN_TEXT .align 16 /* 16-byte boundaries */ #else #define ALIGN_DATA .align 2 #define ALIGN_TEXT .align 4 /* 16-byte boundaries */ #define SUPERALIGN_TEXT .align 4 /* 16-byte boundaries */ #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 ALTENTRY(x) NENTRY(x) #define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE #define LABEL(y) _LABEL(_C_LABEL(y)) #define END(y) .size y, . - y #define ASMSTR .asciz #ifdef __ELF__ #define RCSID(x) .pushsection ".ident"; .asciz x; .popsection #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) \ .pushsection .gnu.warning. ## sym; \ .ascii msg; \ .popsection #else #define WARN_REFERENCES(sym,msg) \ .pushsection .gnu.warning./**/sym; \ .ascii msg; \ .popsection #endif /* __STDC__ */ #endif /* !_I386_ASM_H_ */