| The Android Open Source Project | a27d2ba | 2008-10-21 07:00:00 -0700 | [diff] [blame^] | 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 | #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 | #ifdef 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 | |
| 106 | #define ALTENTRY(name) .globl _C_LABEL(name); _C_LABEL(name): |
| 107 | |
| 108 | #define ASMSTR .asciz |
| 109 | |
| 110 | #define RCSID(x) .text; .asciz x |
| 111 | |
| 112 | #endif /* !_I386_ASM_H_ */ |