ndk/platforms/android-19/arch-x86/usr/include/machine/asm.h

   1 /*      $OpenBSD: asm.h,v 1.8 2004/06/13 21:49:16 niklas 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 /* This is borrowed from FreeBSD /src/sys/i386/include/asmacros.h v1.27 */
  42 /*
  43  * CNAME and HIDENAME manage the relationship between symbol names in C
  44  * and the equivalent assembly language names.  CNAME is given a name as
  45  * it would be used in a C program.  It expands to the equivalent assembly
  46  * language name.  HIDENAME is given an assembly-language name, and expands
  47  * to a possibly-modified form that will be invisible to C programs.
  48  */
  49 #define CNAME(csym)             csym
  50 #define HIDENAME(asmsym)        .asmsym
  51
  52 #ifdef PIC
  53 #define PIC_PROLOGUE    \
  54         pushl   %ebx;   \
  55         call    666f;   \
  56 666:                    \
  57         popl    %ebx;   \
  58         addl    $_C_LABEL(_GLOBAL_OFFSET_TABLE_)+[.-666b], %ebx
  59 #define PIC_EPILOGUE    \
  60         popl    %ebx
  61 #define PIC_PLT(x)      x@PLT
  62 #define PIC_GOT(x)      x@GOT(%ebx)
  63 #define PIC_GOTOFF(x)   x@GOTOFF(%ebx)
  64 #else
  65 #define PIC_PROLOGUE
  66 #define PIC_EPILOGUE
  67 #define PIC_PLT(x)      x
  68 #define PIC_GOT(x)      x
  69 #define PIC_GOTOFF(x)   x
  70 #endif
  71
  72 #define _C_LABEL(name)  name
  73 #define _ASM_LABEL(x)   x
  74
  75 #define CVAROFF(x, y)   _C_LABEL(x) + y
  76
  77 #ifdef __STDC__
  78 # define __CONCAT(x,y)  x ## y
  79 # define __STRING(x)    #x
  80 #else
  81 # define __CONCAT(x,y)  x/**/y
  82 # define __STRING(x)    "x"
  83 #endif
  84
  85 /*
  86  * WEAK ALIAS: create a weak alias
  87  */
  88 #define WEAK_ALIAS(alias,sym) \
  89         .weak alias; \
  90         alias = sym
  91
  92 /*
  93  * WARN_REFERENCES: create a warning if the specified symbol is referenced
  94  */
  95 #define WARN_REFERENCES(_sym,_msg)      \
  96         .section .gnu.warning. ## _sym ; .ascii _msg ; .text
  97
  98 /* let kernels and others override entrypoint alignment */
  99 #ifndef _ALIGN_TEXT
 100 # define _ALIGN_TEXT .align 2, 0x90
 101 #endif
 102
 103 #define _ENTRY(x) \
 104         .text; _ALIGN_TEXT; .globl x; .type x,@function; x:
 105
 106 #define _ASM_SIZE(x)    .size x, .-x;
 107
 108 #define _END(x) \
 109         .fnend; \
 110         _ASM_SIZE(x)
 111
 112 #ifdef GPROF
 113 # define _PROF_PROLOGUE \
 114         pushl %ebp; movl %esp,%ebp; call PIC_PLT(mcount); popl %ebp
 115 #else
 116 # define _PROF_PROLOGUE
 117 #endif
 118
 119 #define ENTRY(y)        _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE
 120 #define NENTRY(y)       _ENTRY(_C_LABEL(y))
 121 #define END(y)          _END(_C_LABEL(y))
 122 #define ASENTRY(y)      _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
 123
 124 #define ENTRY_PRIVATE(y)  ENTRY(y); .hidden _C_LABEL(y)
 125
 126
 127 #define ALTENTRY(name)  .globl _C_LABEL(name); _C_LABEL(name):
 128
 129 #define ASMSTR          .asciz
 130
 131 #define RCSID(x)        .text; .asciz x
 132 #define __FBSDID(x)     RCSID(x)
 133
 134 #endif /* !_I386_ASM_H_ */