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Diffstat (limited to 'libc/arch-x86/include/machine/asm.h')
| -rw-r--r-- | libc/arch-x86/include/machine/asm.h | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/libc/arch-x86/include/machine/asm.h b/libc/arch-x86/include/machine/asm.h new file mode 100644 index 0000000..7a23060 --- /dev/null +++ b/libc/arch-x86/include/machine/asm.h @@ -0,0 +1,124 @@ +/* $OpenBSD: asm.h,v 1.8 2004/06/13 21:49:16 niklas Exp $ */ +/* $NetBSD: asm.h,v 1.7 1994/10/27 04:15:56 cgd 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_ + +/* This is borrowed from FreeBSD /src/sys/i386/include/asmacros.h v1.27 */ +/* + * CNAME and HIDENAME manage the relationship between symbol names in C + * and the equivalent assembly language names. CNAME is given a name as + * it would be used in a C program. It expands to the equivalent assembly + * language name. HIDENAME is given an assembly-language name, and expands + * to a possibly-modified form that will be invisible to C programs. + */ +#define CNAME(csym) csym +#define HIDENAME(asmsym) .asmsym + +#ifdef PIC +#define PIC_PROLOGUE \ + pushl %ebx; \ + call 666f; \ +666: \ + popl %ebx; \ + addl $_C_LABEL(_GLOBAL_OFFSET_TABLE_)+[.-666b], %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 + +#define _C_LABEL(name) name +#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 + +/* + * WEAK ALIAS: create a weak alias + */ +#define WEAK_ALIAS(alias,sym) \ + .weak alias; \ + alias = sym + +/* + * WARN_REFERENCES: create a warning if the specified symbol is referenced + */ +#define WARN_REFERENCES(_sym,_msg) \ + .section .gnu.warning. ## _sym ; .ascii _msg ; .text + +/* let kernels and others override entrypoint alignment */ +#ifndef _ALIGN_TEXT +# define _ALIGN_TEXT .align 2, 0x90 +#endif + +#define _ENTRY(x) \ + .text; _ALIGN_TEXT; .globl x; .type x,@function; x: + +#ifdef GPROF +# define _PROF_PROLOGUE \ + pushl %ebp; movl %esp,%ebp; call PIC_PLT(mcount); popl %ebp +#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 ALTENTRY(name) .globl _C_LABEL(name); _C_LABEL(name): + +#define ASMSTR .asciz + +#define RCSID(x) .text; .asciz x +#define __FBSDID(x) RCSID(x) + +#endif /* !_I386_ASM_H_ */ |