FreeBSD/Linux Kernel Cross Reference
sys/i386/include/asm.h
1 /*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * William Jolitz.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * from: @(#)DEFS.h 5.1 (Berkeley) 4/23/90
37 * $FreeBSD: releng/5.2/sys/i386/include/asm.h 117911 2003-07-23 04:28:51Z peter $
38 */
39
40 #ifndef _MACHINE_ASM_H_
41 #define _MACHINE_ASM_H_
42
43 #include <sys/cdefs.h>
44
45 #ifdef PIC
46 #define PIC_PROLOGUE \
47 pushl %ebx; \
48 call 1f; \
49 1: \
50 popl %ebx; \
51 addl $_GLOBAL_OFFSET_TABLE_+[.-1b],%ebx
52 #define PIC_EPILOGUE \
53 popl %ebx
54 #define PIC_PLT(x) x@PLT
55 #define PIC_GOT(x) x@GOT(%ebx)
56 #else
57 #define PIC_PROLOGUE
58 #define PIC_EPILOGUE
59 #define PIC_PLT(x) x
60 #define PIC_GOT(x) x
61 #endif
62
63 /*
64 * CNAME and HIDENAME manage the relationship between symbol names in C
65 * and the equivalent assembly language names. CNAME is given a name as
66 * it would be used in a C program. It expands to the equivalent assembly
67 * language name. HIDENAME is given an assembly-language name, and expands
68 * to a possibly-modified form that will be invisible to C programs.
69 */
70 #define CNAME(csym) csym
71 #define HIDENAME(asmsym) .asmsym
72
73 /* XXX should use .p2align 4,0x90 for -m486. */
74 #define _START_ENTRY .text; .p2align 2,0x90
75
76 #define _ENTRY(x) _START_ENTRY; \
77 .globl CNAME(x); .type CNAME(x),@function; CNAME(x):
78
79 #ifdef PROF
80 #define ALTENTRY(x) _ENTRY(x); \
81 pushl %ebp; movl %esp,%ebp; \
82 call PIC_PLT(HIDENAME(mcount)); \
83 popl %ebp; \
84 jmp 9f
85 #define ENTRY(x) _ENTRY(x); \
86 pushl %ebp; movl %esp,%ebp; \
87 call PIC_PLT(HIDENAME(mcount)); \
88 popl %ebp; \
89 9:
90 #else
91 #define ALTENTRY(x) _ENTRY(x)
92 #define ENTRY(x) _ENTRY(x)
93 #endif
94
95 #define RCSID(x) .text; .asciz x
96
97 #undef __FBSDID
98 #if !defined(lint) && !defined(STRIP_FBSDID)
99 #define __FBSDID(s) .ident s
100 #else
101 #define __FBSDID(s) /* nothing */
102 #endif /* not lint and not STRIP_FBSDID */
103
104 #endif /* !_MACHINE_ASM_H_ */
Cache object: 7388599c4cc2b96189cc5b915e439cfa
|