asmacros.h revision 2579
11817Sdg/*- 21817Sdg * Copyright (c) 1993 The Regents of the University of California. 31817Sdg * All rights reserved. 41817Sdg * 51817Sdg * Redistribution and use in source and binary forms, with or without 61817Sdg * modification, are permitted provided that the following conditions 71817Sdg * are met: 81817Sdg * 1. Redistributions of source code must retain the above copyright 91817Sdg * notice, this list of conditions and the following disclaimer. 101817Sdg * 2. Redistributions in binary form must reproduce the above copyright 111817Sdg * notice, this list of conditions and the following disclaimer in the 121817Sdg * documentation and/or other materials provided with the distribution. 131817Sdg * 3. All advertising materials mentioning features or use of this software 141817Sdg * must display the following acknowledgement: 151817Sdg * This product includes software developed by the University of 161817Sdg * California, Berkeley and its contributors. 171817Sdg * 4. Neither the name of the University nor the names of its contributors 181817Sdg * may be used to endorse or promote products derived from this software 191817Sdg * without specific prior written permission. 201817Sdg * 211817Sdg * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221817Sdg * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231817Sdg * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241817Sdg * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251817Sdg * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261817Sdg * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271817Sdg * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281817Sdg * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291817Sdg * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301817Sdg * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311817Sdg * SUCH DAMAGE. 321817Sdg * 332579Sbde * $Id: asmacros.h,v 1.4 1994/08/19 11:20:11 jkh Exp $ 341817Sdg */ 351817Sdg 362579Sbde#ifndef _MACHINE_ASMACROS_H_ 372579Sbde#define _MACHINE_ASMACROS_H_ 382123Sjkh 392579Sbde#ifdef KERNEL 402579Sbde 41757Sdg#define ALIGN_DATA .align 2 /* 4 byte alignment, zero filled */ 42757Sdg#define ALIGN_TEXT .align 2,0x90 /* 4-byte alignment, nop filled */ 43757Sdg#define SUPERALIGN_TEXT .align 4,0x90 /* 16-byte alignment (better for 486), nop filled */ 44757Sdg 45757Sdg#define GEN_ENTRY(name) ALIGN_TEXT; .globl name; name: 46757Sdg#define NON_GPROF_ENTRY(name) GEN_ENTRY(_/**/name) 47757Sdg 481321Sdg/* These three are place holders for future changes to the profiling code */ 491321Sdg#define MCOUNT_LABEL(name) 501321Sdg#define MEXITCOUNT 511321Sdg#define FAKE_MCOUNT(caller) 521321Sdg 53757Sdg#ifdef GPROF 54757Sdg/* 55757Sdg * ALTENTRY() must be before a corresponding ENTRY() so that it can jump 56757Sdg * over the mcounting. 57757Sdg */ 58757Sdg#define ALTENTRY(name) GEN_ENTRY(_/**/name); MCOUNT; jmp 2f 59757Sdg#define ENTRY(name) GEN_ENTRY(_/**/name); MCOUNT; 2: 60757Sdg/* 61757Sdg * The call to mcount supports the usual (bad) conventions. We allocate 62757Sdg * some data and pass a pointer to it although the FreeBSD doesn't use 63757Sdg * the data. We set up a frame before calling mcount because that is 64757Sdg * the standard convention although it makes work for both mcount and 65757Sdg * callers. 66757Sdg */ 67757Sdg#define MCOUNT .data; ALIGN_DATA; 1:; .long 0; .text; \ 68757Sdg pushl %ebp; movl %esp,%ebp; \ 69757Sdg movl $1b,%eax; call mcount; popl %ebp 70757Sdg#else 71757Sdg/* 72757Sdg * ALTENTRY() has to align because it is before a corresponding ENTRY(). 73757Sdg * ENTRY() has to align to because there may be no ALTENTRY() before it. 74757Sdg * If there is a previous ALTENTRY() then the alignment code is empty. 75757Sdg */ 76757Sdg#define ALTENTRY(name) GEN_ENTRY(_/**/name) 77757Sdg#define ENTRY(name) GEN_ENTRY(_/**/name) 781321Sdg#define MCOUNT 79757Sdg 80757Sdg#endif 81757Sdg 82757Sdg#ifdef DUMMY_NOPS /* this will break some older machines */ 83757Sdg#define FASTER_NOP 84757Sdg#define NOP 85757Sdg#else 86757Sdg#define FASTER_NOP pushl %eax ; inb $0x84,%al ; popl %eax 87757Sdg#define NOP pushl %eax ; inb $0x84,%al ; inb $0x84,%al ; popl %eax 88757Sdg#endif 89757Sdg 902579Sbde#else /* !KERNEL */ 912579Sbde 922579Sbde#include "/usr/src/lib/libc/i386/DEFS.h" /* XXX blech */ 932579Sbde 942123Sjkh#ifndef RCSID 952123Sjkh#define RCSID(a) 962123Sjkh#endif 972123Sjkh 982579Sbde#endif /* KERNEL */ 992579Sbde 1002579Sbde#endif /* !_MACHINE_ASMACROS_H_ */ 101