asmacros.h revision 2123
1176348Smarcel/*- 2176348Smarcel * Copyright (c) 1993 The Regents of the University of California. 3176348Smarcel * All rights reserved. 4176348Smarcel * 5176348Smarcel * Redistribution and use in source and binary forms, with or without 6176348Smarcel * modification, are permitted provided that the following conditions 7176348Smarcel * are met: 8176348Smarcel * 1. Redistributions of source code must retain the above copyright 9176348Smarcel * notice, this list of conditions and the following disclaimer. 10176348Smarcel * 2. Redistributions in binary form must reproduce the above copyright 11176348Smarcel * notice, this list of conditions and the following disclaimer in the 12176348Smarcel * documentation and/or other materials provided with the distribution. 13176348Smarcel * 3. All advertising materials mentioning features or use of this software 14176348Smarcel * must display the following acknowledgement: 15176348Smarcel * This product includes software developed by the University of 16176348Smarcel * California, Berkeley and its contributors. 17176348Smarcel * 4. Neither the name of the University nor the names of its contributors 18176348Smarcel * may be used to endorse or promote products derived from this software 19176348Smarcel * without specific prior written permission. 20176348Smarcel * 21176348Smarcel * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22176348Smarcel * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23176348Smarcel * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24176348Smarcel * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25176348Smarcel * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26176348Smarcel * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27176348Smarcel * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28176348Smarcel * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29176348Smarcel * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30182723Sraj * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31182723Sraj * SUCH DAMAGE. 32182723Sraj * 33176348Smarcel * $Id: asmacros.h,v 1.3 1994/08/02 07:38:40 davidg Exp $ 34176348Smarcel */ 35176348Smarcel 36177152Sobrien#ifndef _ASMACROS_H_ 37176348Smarcel#define _ASMACROS_H_ 1 38176348Smarcel 39#define ALIGN_DATA .align 2 /* 4 byte alignment, zero filled */ 40#define ALIGN_TEXT .align 2,0x90 /* 4-byte alignment, nop filled */ 41#define SUPERALIGN_TEXT .align 4,0x90 /* 16-byte alignment (better for 486), nop filled */ 42 43#define GEN_ENTRY(name) ALIGN_TEXT; .globl name; name: 44#define NON_GPROF_ENTRY(name) GEN_ENTRY(_/**/name) 45 46/* These three are place holders for future changes to the profiling code */ 47#define MCOUNT_LABEL(name) 48#define MEXITCOUNT 49#define FAKE_MCOUNT(caller) 50 51#ifdef GPROF 52/* 53 * ALTENTRY() must be before a corresponding ENTRY() so that it can jump 54 * over the mcounting. 55 */ 56#define ALTENTRY(name) GEN_ENTRY(_/**/name); MCOUNT; jmp 2f 57#define ENTRY(name) GEN_ENTRY(_/**/name); MCOUNT; 2: 58/* 59 * The call to mcount supports the usual (bad) conventions. We allocate 60 * some data and pass a pointer to it although the FreeBSD doesn't use 61 * the data. We set up a frame before calling mcount because that is 62 * the standard convention although it makes work for both mcount and 63 * callers. 64 */ 65#define MCOUNT .data; ALIGN_DATA; 1:; .long 0; .text; \ 66 pushl %ebp; movl %esp,%ebp; \ 67 movl $1b,%eax; call mcount; popl %ebp 68#else 69/* 70 * ALTENTRY() has to align because it is before a corresponding ENTRY(). 71 * ENTRY() has to align to because there may be no ALTENTRY() before it. 72 * If there is a previous ALTENTRY() then the alignment code is empty. 73 */ 74#define ALTENTRY(name) GEN_ENTRY(_/**/name) 75#define ENTRY(name) GEN_ENTRY(_/**/name) 76#define MCOUNT 77 78#endif 79 80#ifdef DUMMY_NOPS /* this will break some older machines */ 81#define FASTER_NOP 82#define NOP 83#else 84#define FASTER_NOP pushl %eax ; inb $0x84,%al ; popl %eax 85#define NOP pushl %eax ; inb $0x84,%al ; inb $0x84,%al ; popl %eax 86#endif 87 88#ifndef RCSID 89#define RCSID(a) 90#endif 91 92#endif /* _ASMACROS_H_ */ 93