LCOM1920-T02G10

/*        $NetBSD: asm.h,v 1.41 2013/09/12 15:36:17 joerg 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        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__ */

#if defined(__minix)

#define IMPORT(sym)               \

        .extern _C_LABEL(sym)

#endif /* defined(__minix) */

#endif /* !_I386_ASM_H_ */