1 /* $OpenBSD: asm.h,v 1.10 2007/05/27 18:34:01 art Exp $ */
2 /* $NetBSD: asm.h,v 1.7 1994/10/27 04:15:56 cgd Exp $ */
3
4 /*-
5 * Copyright (c) 1990 The Regents of the University of California.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * William Jolitz.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * @(#)asm.h 5.5 (Berkeley) 5/7/91
36 */
37
38 #ifndef _I386_ASM_H_
39 #define _I386_ASM_H_
40
41 #ifdef PIC
42 #define PIC_PROLOGUE \
43 pushl %ebx; \
44 call 666f; \
45 666: \
46 popl %ebx; \
47 addl $_C_LABEL(_GLOBAL_OFFSET_TABLE_)+[.-666b], %ebx
48 #define PIC_EPILOGUE \
49 popl %ebx
50 #define PIC_PLT(x) x@PLT
51 #define PIC_GOT(x) x@GOT(%ebx)
52 #define PIC_GOTOFF(x) x@GOTOFF(%ebx)
53 #else
54 #define PIC_PROLOGUE
55 #define PIC_EPILOGUE
56 #define PIC_PLT(x) x
57 #define PIC_GOT(x) x
58 #define PIC_GOTOFF(x) x
59 #endif
60
61 #define _C_LABEL(name) name
62 #define _ASM_LABEL(x) x
63
64 #define CVAROFF(x, y) _C_LABEL(x) + y
65
66 #ifdef __STDC__
67 # define __CONCAT(x,y) x ## y
68 # define __STRING(x) #x
69 #else
70 # define __CONCAT(x,y) x/**/y
71 # define __STRING(x) "x"
72 #endif
73
74 /*
75 * WEAK ALIAS: create a weak alias
76 */
77 #define WEAK_ALIAS(alias,sym) \
78 .weak alias; \
79 alias = sym
80
81 /*
82 * WARN_REFERENCES: create a warning if the specified symbol is referenced
83 */
84 #define WARN_REFERENCES(_sym,_msg) \
85 .section .gnu.warning. ## _sym ; .ascii _msg ; .text
86
87 /* let kernels and others override entrypoint alignment */
88 #ifndef _ALIGN_TEXT
89 # define _ALIGN_TEXT .align 2, 0x90
90 #endif
91
92 #define _ENTRY(x) \
93 .text; _ALIGN_TEXT; .globl x; .type x,@function; x:
94
95 #if defined(PROF) || defined(GPROF)
96 # define _PROF_PROLOGUE \
97 pushl %ebp; movl %esp,%ebp; call PIC_PLT(mcount); popl %ebp
98 #else
99 # define _PROF_PROLOGUE
100 #endif
101
102 #define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE
103 #define NENTRY(y) _ENTRY(_C_LABEL(y))
104 #define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
105 #define NASENTRY(y) _ENTRY(_ASM_LABEL(y))
106
107 #define ALTENTRY(name) .globl _C_LABEL(name); _C_LABEL(name):
108
109 #define ASMSTR .asciz
110
111 #define RCSID(x) .text; .asciz x
112
113 #ifdef _KERNEL
114
115 #ifdef MULTIPROCESSOR
116 #define CPUVAR(var) %fs:__CONCAT(CPU_INFO_,var)
117 #else
118 #define CPUVAR(var) _C_LABEL(cpu_info_primary)+__CONCAT(CPU_INFO_,var)
119 #endif
120
121 #endif /* _KERNEL */
122
123 #endif /* !_I386_ASM_H_ */