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 1.4 1994/08/19 11:20:11 jkh Exp $ 34 */ 35 36 #ifndef _MACHINE_ASMACROS_H_ 37 #define _MACHINE_ASMACROS_H_ 38 39 #ifdef KERNEL 40 41 #define ALIGN_DATA .align 2 /* 4 byte alignment, zero filled */ 42 #define ALIGN_TEXT .align 2,0x90 /* 4-byte alignment, nop filled */ 43 #define SUPERALIGN_TEXT .align 4,0x90 /* 16-byte alignment (better for 486), nop filled */ 44 45 #define GEN_ENTRY(name) ALIGN_TEXT; .globl name; name: 46 #define NON_GPROF_ENTRY(name) GEN_ENTRY(_/**/name) 47 48 /* These three are place holders for future changes to the profiling code */ 49 #define MCOUNT_LABEL(name) 50 #define MEXITCOUNT 51 #define FAKE_MCOUNT(caller) 52 53 #ifdef GPROF 54 /* 55 * ALTENTRY() must be before a corresponding ENTRY() so that it can jump 56 * over the mcounting. 57 */ 58 #define ALTENTRY(name) GEN_ENTRY(_/**/name); MCOUNT; jmp 2f 59 #define ENTRY(name) GEN_ENTRY(_/**/name); MCOUNT; 2: 60 /* 61 * The call to mcount supports the usual (bad) conventions. We allocate 62 * some data and pass a pointer to it although the FreeBSD doesn't use 63 * the data. We set up a frame before calling mcount because that is 64 * the standard convention although it makes work for both mcount and 65 * callers. 66 */ 67 #define MCOUNT .data; ALIGN_DATA; 1:; .long 0; .text; \ 68 pushl %ebp; movl %esp,%ebp; \ 69 movl $1b,%eax; call mcount; popl %ebp 70 #else 71 /* 72 * ALTENTRY() has to align because it is before a corresponding ENTRY(). 73 * ENTRY() has to align to because there may be no ALTENTRY() before it. 74 * If there is a previous ALTENTRY() then the alignment code is empty. 75 */ 76 #define ALTENTRY(name) GEN_ENTRY(_/**/name) 77 #define ENTRY(name) GEN_ENTRY(_/**/name) 78 #define MCOUNT 79 80 #endif 81 82 #ifdef DUMMY_NOPS /* this will break some older machines */ 83 #define FASTER_NOP 84 #define NOP 85 #else 86 #define FASTER_NOP pushl %eax ; inb $0x84,%al ; popl %eax 87 #define NOP pushl %eax ; inb $0x84,%al ; inb $0x84,%al ; popl %eax 88 #endif 89 90 #else /* !KERNEL */ 91 92 #include "/usr/src/lib/libc/i386/DEFS.h" /* XXX blech */ 93 94 #ifndef RCSID 95 #define RCSID(a) 96 #endif 97 98 #endif /* KERNEL */ 99 100 #endif /* !_MACHINE_ASMACROS_H_ */ 101