asmacros.h revision 2123
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 * 332123Sjkh * $Id: asmacros.h,v 1.3 1994/08/02 07:38:40 davidg Exp $ 341817Sdg */ 351817Sdg 362123Sjkh#ifndef _ASMACROS_H_ 372123Sjkh#define _ASMACROS_H_ 1 382123Sjkh 39757Sdg#define ALIGN_DATA .align 2 /* 4 byte alignment, zero filled */ 40757Sdg#define ALIGN_TEXT .align 2,0x90 /* 4-byte alignment, nop filled */ 41757Sdg#define SUPERALIGN_TEXT .align 4,0x90 /* 16-byte alignment (better for 486), nop filled */ 42757Sdg 43757Sdg#define GEN_ENTRY(name) ALIGN_TEXT; .globl name; name: 44757Sdg#define NON_GPROF_ENTRY(name) GEN_ENTRY(_/**/name) 45757Sdg 461321Sdg/* These three are place holders for future changes to the profiling code */ 471321Sdg#define MCOUNT_LABEL(name) 481321Sdg#define MEXITCOUNT 491321Sdg#define FAKE_MCOUNT(caller) 501321Sdg 51757Sdg#ifdef GPROF 52757Sdg/* 53757Sdg * ALTENTRY() must be before a corresponding ENTRY() so that it can jump 54757Sdg * over the mcounting. 55757Sdg */ 56757Sdg#define ALTENTRY(name) GEN_ENTRY(_/**/name); MCOUNT; jmp 2f 57757Sdg#define ENTRY(name) GEN_ENTRY(_/**/name); MCOUNT; 2: 58757Sdg/* 59757Sdg * The call to mcount supports the usual (bad) conventions. We allocate 60757Sdg * some data and pass a pointer to it although the FreeBSD doesn't use 61757Sdg * the data. We set up a frame before calling mcount because that is 62757Sdg * the standard convention although it makes work for both mcount and 63757Sdg * callers. 64757Sdg */ 65757Sdg#define MCOUNT .data; ALIGN_DATA; 1:; .long 0; .text; \ 66757Sdg pushl %ebp; movl %esp,%ebp; \ 67757Sdg movl $1b,%eax; call mcount; popl %ebp 68757Sdg#else 69757Sdg/* 70757Sdg * ALTENTRY() has to align because it is before a corresponding ENTRY(). 71757Sdg * ENTRY() has to align to because there may be no ALTENTRY() before it. 72757Sdg * If there is a previous ALTENTRY() then the alignment code is empty. 73757Sdg */ 74757Sdg#define ALTENTRY(name) GEN_ENTRY(_/**/name) 75757Sdg#define ENTRY(name) GEN_ENTRY(_/**/name) 761321Sdg#define MCOUNT 77757Sdg 78757Sdg#endif 79757Sdg 80757Sdg#ifdef DUMMY_NOPS /* this will break some older machines */ 81757Sdg#define FASTER_NOP 82757Sdg#define NOP 83757Sdg#else 84757Sdg#define FASTER_NOP pushl %eax ; inb $0x84,%al ; popl %eax 85757Sdg#define NOP pushl %eax ; inb $0x84,%al ; inb $0x84,%al ; popl %eax 86757Sdg#endif 87757Sdg 882123Sjkh#ifndef RCSID 892123Sjkh#define RCSID(a) 902123Sjkh#endif 912123Sjkh 922123Sjkh#endif /* _ASMACROS_H_ */ 93