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Annotation of sys/arch/i386/include/asm.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: asm.h,v 1.10 2007/05/27 18:34:01 art Exp $    */
        !             2: /*     $NetBSD: asm.h,v 1.7 1994/10/27 04:15:56 cgd Exp $      */
        !             3:
        !             4: /*-
        !             5:  * Copyright (c) 1990 The Regents of the University of California.
        !             6:  * All rights reserved.
        !             7:  *
        !             8:  * This code is derived from software contributed to Berkeley by
        !             9:  * William Jolitz.
        !            10:  *
        !            11:  * Redistribution and use in source and binary forms, with or without
        !            12:  * modification, are permitted provided that the following conditions
        !            13:  * are met:
        !            14:  * 1. Redistributions of source code must retain the above copyright
        !            15:  *    notice, this list of conditions and the following disclaimer.
        !            16:  * 2. Redistributions in binary form must reproduce the above copyright
        !            17:  *    notice, this list of conditions and the following disclaimer in the
        !            18:  *    documentation and/or other materials provided with the distribution.
        !            19:  * 3. Neither the name of the University nor the names of its contributors
        !            20:  *    may be used to endorse or promote products derived from this software
        !            21:  *    without specific prior written permission.
        !            22:  *
        !            23:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            24:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            25:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            26:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            27:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            28:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            29:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            30:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            31:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            32:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            33:  * SUCH DAMAGE.
        !            34:  *
        !            35:  *     @(#)asm.h       5.5 (Berkeley) 5/7/91
        !            36:  */
        !            37:
        !            38: #ifndef _I386_ASM_H_
        !            39: #define _I386_ASM_H_
        !            40:
        !            41: #ifdef PIC
        !            42: #define PIC_PROLOGUE   \
        !            43:        pushl   %ebx;   \
        !            44:        call    666f;   \
        !            45: 666:                   \
        !            46:        popl    %ebx;   \
        !            47:        addl    $_C_LABEL(_GLOBAL_OFFSET_TABLE_)+[.-666b], %ebx
        !            48: #define PIC_EPILOGUE   \
        !            49:        popl    %ebx
        !            50: #define PIC_PLT(x)     x@PLT
        !            51: #define PIC_GOT(x)     x@GOT(%ebx)
        !            52: #define PIC_GOTOFF(x)  x@GOTOFF(%ebx)
        !            53: #else
        !            54: #define PIC_PROLOGUE
        !            55: #define PIC_EPILOGUE
        !            56: #define PIC_PLT(x)     x
        !            57: #define PIC_GOT(x)     x
        !            58: #define PIC_GOTOFF(x)  x
        !            59: #endif
        !            60:
        !            61: #define _C_LABEL(name) name
        !            62: #define        _ASM_LABEL(x)   x
        !            63:
        !            64: #define CVAROFF(x, y)  _C_LABEL(x) + y
        !            65:
        !            66: #ifdef __STDC__
        !            67: # define __CONCAT(x,y) x ## y
        !            68: # define __STRING(x)   #x
        !            69: #else
        !            70: # define __CONCAT(x,y) x/**/y
        !            71: # define __STRING(x)   "x"
        !            72: #endif
        !            73:
        !            74: /*
        !            75:  * WEAK ALIAS: create a weak alias
        !            76:  */
        !            77: #define WEAK_ALIAS(alias,sym) \
        !            78:        .weak alias; \
        !            79:        alias = sym
        !            80:
        !            81: /*
        !            82:  * WARN_REFERENCES: create a warning if the specified symbol is referenced
        !            83:  */
        !            84: #define WARN_REFERENCES(_sym,_msg)     \
        !            85:        .section .gnu.warning. ## _sym ; .ascii _msg ; .text
        !            86:
        !            87: /* let kernels and others override entrypoint alignment */
        !            88: #ifndef _ALIGN_TEXT
        !            89: # define _ALIGN_TEXT .align 2, 0x90
        !            90: #endif
        !            91:
        !            92: #define _ENTRY(x) \
        !            93:        .text; _ALIGN_TEXT; .globl x; .type x,@function; x:
        !            94:
        !            95: #if defined(PROF) || defined(GPROF)
        !            96: # define _PROF_PROLOGUE        \
        !            97:        pushl %ebp; movl %esp,%ebp; call PIC_PLT(mcount); popl %ebp
        !            98: #else
        !            99: # define _PROF_PROLOGUE
        !           100: #endif
        !           101:
        !           102: #define        ENTRY(y)        _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE
        !           103: #define        NENTRY(y)       _ENTRY(_C_LABEL(y))
        !           104: #define        ASENTRY(y)      _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
        !           105: #define        NASENTRY(y)     _ENTRY(_ASM_LABEL(y))
        !           106:
        !           107: #define        ALTENTRY(name)  .globl _C_LABEL(name); _C_LABEL(name):
        !           108:
        !           109: #define        ASMSTR          .asciz
        !           110:
        !           111: #define RCSID(x)       .text; .asciz x
        !           112:
        !           113: #ifdef _KERNEL
        !           114:
        !           115: #ifdef MULTIPROCESSOR
        !           116: #define CPUVAR(var)    %fs:__CONCAT(CPU_INFO_,var)
        !           117: #else
        !           118: #define CPUVAR(var)    _C_LABEL(cpu_info_primary)+__CONCAT(CPU_INFO_,var)
        !           119: #endif
        !           120:
        !           121: #endif /* _KERNEL */
        !           122:
        !           123: #endif /* !_I386_ASM_H_ */