2 * Copyright (c) 1990 The Regents of the University of California.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
36 * from: @(#)DEFS.h 5.1 (Berkeley) 4/23/90
37 * $FreeBSD: src/sys/i386/include/asm.h,v 1.7 2000/01/25 09:01:55 bde Exp $
38 * $DragonFly: src/sys/i386/include/Attic/asm.h,v 1.3 2004/03/20 16:27:41 drhodus Exp $
41 #ifndef _MACHINE_ASM_H_
42 #define _MACHINE_ASM_H_
44 #include <sys/cdefs.h>
47 #define PIC_PROLOGUE \
52 addl $_GLOBAL_OFFSET_TABLE_+[.-1b],%ebx
53 #define PIC_EPILOGUE \
55 #define PIC_PLT(x) x@PLT
56 #define PIC_GOT(x) x@GOT(%ebx)
57 #define PIC_GOTOFF(x) x@GOTOFF(%ebx)
63 #define PIC_GOTOFF(x) x
67 * CNAME and HIDENAME manage the relationship between symbol names in C
68 * and the equivalent assembly language names. CNAME is given a name as
69 * it would be used in a C program. It expands to the equivalent assembly
70 * language name. HIDENAME is given an assembly-language name, and expands
71 * to a possibly-modified form that will be invisible to C programs.
73 #define CNAME(csym) csym
74 #define HIDENAME(asmsym) __CONCAT(.,asmsym)
76 /* XXX should use .p2align 4,0x90 for -m486. */
77 #define _START_ENTRY .text; .p2align 2,0x90
79 #define _ENTRY(x) _START_ENTRY; \
80 .globl CNAME(x); .type CNAME(x),@function; CNAME(x):
83 #define ALTENTRY(x) _ENTRY(x); \
84 pushl %ebp; movl %esp,%ebp; \
85 call PIC_PLT(HIDENAME(mcount)); \
88 #define ENTRY(x) _ENTRY(x); \
89 pushl %ebp; movl %esp,%ebp; \
90 call PIC_PLT(HIDENAME(mcount)); \
94 #define ALTENTRY(x) _ENTRY(x)
95 #define ENTRY(x) _ENTRY(x)
98 #define RCSID(x) .text; .asciz x
100 #ifdef _ARCH_INDIRECT
102 * Generate code to select between the generic functions and _ARCH_INDIRECT
104 * XXX nested __CONCATs don't work with non-ANSI cpp's.
106 #define ANAME(x) CNAME(__CONCAT(__CONCAT(__,_ARCH_INDIRECT),x))
107 #define ASELNAME(x) CNAME(__CONCAT(__arch_select_,x))
108 #define AVECNAME(x) CNAME(__CONCAT(__arch_,x))
109 #define GNAME(x) CNAME(__CONCAT(__generic_,x))
111 /* Don't bother profiling this. */
113 #define ARCH_DISPATCH(x) \
115 .globl CNAME(x); .type CNAME(x),@function; CNAME(x): ; \
117 movl PIC_GOT(AVECNAME(x)),%eax; \
121 #define ARCH_SELECT(x) _START_ENTRY; \
122 .type ASELNAME(x),@function; \
125 call PIC_PLT(CNAME(__get_hw_float)); \
127 movl PIC_GOT(ANAME(x)),%eax; \
129 movl PIC_GOT(GNAME(x)),%eax; \
131 movl PIC_GOT(AVECNAME(x)),%edx; \
136 #define ARCH_DISPATCH(x) \
138 .globl CNAME(x); .type CNAME(x),@function; CNAME(x): ; \
141 #define ARCH_SELECT(x) _START_ENTRY; \
142 .type ASELNAME(x),@function; \
144 call CNAME(__get_hw_float); \
146 movl $ANAME(x),%eax; \
148 movl $GNAME(x),%eax; \
150 movl %eax,AVECNAME(x); \
154 #define ARCH_VECTOR(x) .data; .p2align 2; \
155 .globl AVECNAME(x); \
156 .type AVECNAME(x),@object; \
157 .size AVECNAME(x),4; \
158 AVECNAME(x): .long ASELNAME(x)
161 #define _ENTRY(x) ARCH_VECTOR(x); ARCH_SELECT(x); ARCH_DISPATCH(x); \
163 .globl ANAME(x); .type ANAME(x),@function; ANAME(x):
165 #endif /* _ARCH_INDIRECT */
167 #endif /* !_MACHINE_ASM_H_ */