1 /*- 2 * Copyright (c) 1993 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * $Id: asmacros.h,v 1.3 1994/08/02 07:38:40 davidg Exp $ 34 */ 35 36 #ifndef _ASMACROS_H_ 37 #define _ASMACROS_H_ 1 38 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