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: head/sys/i386/include/asm.h 92998 2002-03-23 02:01:27Z obrien $
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; \
491: \
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#define PIC_GOTOFF(x) x@GOTOFF(%ebx)
57#else
58#define PIC_PROLOGUE
59#define PIC_EPILOGUE
60#define PIC_PLT(x) x
61#define PIC_GOT(x) x
62#define PIC_GOTOFF(x) x
63#endif
64
65/*
66 * CNAME and HIDENAME manage the relationship between symbol names in C
67 * and the equivalent assembly language names. CNAME is given a name as
68 * it would be used in a C program. It expands to the equivalent assembly
69 * language name. HIDENAME is given an assembly-language name, and expands
70 * to a possibly-modified form that will be invisible to C programs.
71 */
72#ifdef __ELF__
73#define CNAME(csym) csym
74#define HIDENAME(asmsym) __CONCAT(.,asmsym)
75#else
76#define CNAME(csym) __CONCAT(_,csym)
77#define HIDENAME(asmsym) asmsym
78#endif
79
80/* XXX should use .p2align 4,0x90 for -m486. */
81#define _START_ENTRY .text; .p2align 2,0x90
82
83#define _ENTRY(x) _START_ENTRY; \
84 .globl CNAME(x); .type CNAME(x),@function; CNAME(x):
85
86#ifdef PROF
87#define ALTENTRY(x) _ENTRY(x); \
88 pushl %ebp; movl %esp,%ebp; \
89 call PIC_PLT(HIDENAME(mcount)); \
90 popl %ebp; \
91 jmp 9f
92#define ENTRY(x) _ENTRY(x); \
93 pushl %ebp; movl %esp,%ebp; \
94 call PIC_PLT(HIDENAME(mcount)); \
95 popl %ebp; \
96 9:
97#else
98#define ALTENTRY(x) _ENTRY(x)
99#define ENTRY(x) _ENTRY(x)
100#endif
101
102#define RCSID(x) .text; .asciz x
103
104#undef __FBSDID
105#if !defined(lint) && !defined(STRIP_FBSDID)
106#ifdef __ELF__
107#define __FBSDID(s) .ident s
108#else
109#define __FBSDID(s) .data ; .asciz s ; .previous
110#endif
111#else
112#define __FBSDID(s) /* nothing */
113#endif /* not lint and not STRIP_FBSDID */
114
115#ifdef _ARCH_INDIRECT
116/*
117 * Generate code to select between the generic functions and _ARCH_INDIRECT
118 * specific ones.
119 * XXX nested __CONCATs don't work with non-ANSI cpp's.
120 */
121#define ANAME(x) CNAME(__CONCAT(__CONCAT(__,_ARCH_INDIRECT),x))
122#define ASELNAME(x) CNAME(__CONCAT(__arch_select_,x))
123#define AVECNAME(x) CNAME(__CONCAT(__arch_,x))
124#define GNAME(x) CNAME(__CONCAT(__generic_,x))
125
126/* Don't bother profiling this. */
127#ifdef PIC
128#define ARCH_DISPATCH(x) \
129 _START_ENTRY; \
130 .globl CNAME(x); .type CNAME(x),@function; CNAME(x): ; \
131 PIC_PROLOGUE; \
132 movl PIC_GOT(AVECNAME(x)),%eax; \
133 PIC_EPILOGUE; \
134 jmpl *(%eax)
135
136#define ARCH_SELECT(x) _START_ENTRY; \
137 .type ASELNAME(x),@function; \
138 ASELNAME(x): \
139 PIC_PROLOGUE; \
140 call PIC_PLT(CNAME(__get_hw_float)); \
141 testl %eax,%eax; \
142 movl PIC_GOT(ANAME(x)),%eax; \
143 jne 8f; \
144 movl PIC_GOT(GNAME(x)),%eax; \
145 8: \
146 movl PIC_GOT(AVECNAME(x)),%edx; \
147 movl %eax,(%edx); \
148 PIC_EPILOGUE; \
149 jmpl *%eax
150#else /* !PIC */
151#define ARCH_DISPATCH(x) \
152 _START_ENTRY; \
153 .globl CNAME(x); .type CNAME(x),@function; CNAME(x): ; \
154 jmpl *AVECNAME(x)
155
156#define ARCH_SELECT(x) _START_ENTRY; \
157 .type ASELNAME(x),@function; \
158 ASELNAME(x): \
159 call CNAME(__get_hw_float); \
160 testl %eax,%eax; \
161 movl $ANAME(x),%eax; \
162 jne 8f; \
163 movl $GNAME(x),%eax; \
164 8: \
165 movl %eax,AVECNAME(x); \
166 jmpl *%eax
167#endif /* PIC */
168
169#define ARCH_VECTOR(x) .data; .p2align 2; \
170 .globl AVECNAME(x); \
171 .type AVECNAME(x),@object; \
172 .size AVECNAME(x),4; \
173 AVECNAME(x): .long ASELNAME(x)
174
175#undef _ENTRY
176#define _ENTRY(x) ARCH_VECTOR(x); ARCH_SELECT(x); ARCH_DISPATCH(x); \
177 _START_ENTRY; \
178 .globl ANAME(x); .type ANAME(x),@function; ANAME(x):
179
180#endif /* _ARCH_INDIRECT */
181
182#endif /* !_MACHINE_ASM_H_ */
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: head/sys/i386/include/asm.h 92998 2002-03-23 02:01:27Z obrien $
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; \
491: \
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#define PIC_GOTOFF(x) x@GOTOFF(%ebx)
57#else
58#define PIC_PROLOGUE
59#define PIC_EPILOGUE
60#define PIC_PLT(x) x
61#define PIC_GOT(x) x
62#define PIC_GOTOFF(x) x
63#endif
64
65/*
66 * CNAME and HIDENAME manage the relationship between symbol names in C
67 * and the equivalent assembly language names. CNAME is given a name as
68 * it would be used in a C program. It expands to the equivalent assembly
69 * language name. HIDENAME is given an assembly-language name, and expands
70 * to a possibly-modified form that will be invisible to C programs.
71 */
72#ifdef __ELF__
73#define CNAME(csym) csym
74#define HIDENAME(asmsym) __CONCAT(.,asmsym)
75#else
76#define CNAME(csym) __CONCAT(_,csym)
77#define HIDENAME(asmsym) asmsym
78#endif
79
80/* XXX should use .p2align 4,0x90 for -m486. */
81#define _START_ENTRY .text; .p2align 2,0x90
82
83#define _ENTRY(x) _START_ENTRY; \
84 .globl CNAME(x); .type CNAME(x),@function; CNAME(x):
85
86#ifdef PROF
87#define ALTENTRY(x) _ENTRY(x); \
88 pushl %ebp; movl %esp,%ebp; \
89 call PIC_PLT(HIDENAME(mcount)); \
90 popl %ebp; \
91 jmp 9f
92#define ENTRY(x) _ENTRY(x); \
93 pushl %ebp; movl %esp,%ebp; \
94 call PIC_PLT(HIDENAME(mcount)); \
95 popl %ebp; \
96 9:
97#else
98#define ALTENTRY(x) _ENTRY(x)
99#define ENTRY(x) _ENTRY(x)
100#endif
101
102#define RCSID(x) .text; .asciz x
103
104#undef __FBSDID
105#if !defined(lint) && !defined(STRIP_FBSDID)
106#ifdef __ELF__
107#define __FBSDID(s) .ident s
108#else
109#define __FBSDID(s) .data ; .asciz s ; .previous
110#endif
111#else
112#define __FBSDID(s) /* nothing */
113#endif /* not lint and not STRIP_FBSDID */
114
115#ifdef _ARCH_INDIRECT
116/*
117 * Generate code to select between the generic functions and _ARCH_INDIRECT
118 * specific ones.
119 * XXX nested __CONCATs don't work with non-ANSI cpp's.
120 */
121#define ANAME(x) CNAME(__CONCAT(__CONCAT(__,_ARCH_INDIRECT),x))
122#define ASELNAME(x) CNAME(__CONCAT(__arch_select_,x))
123#define AVECNAME(x) CNAME(__CONCAT(__arch_,x))
124#define GNAME(x) CNAME(__CONCAT(__generic_,x))
125
126/* Don't bother profiling this. */
127#ifdef PIC
128#define ARCH_DISPATCH(x) \
129 _START_ENTRY; \
130 .globl CNAME(x); .type CNAME(x),@function; CNAME(x): ; \
131 PIC_PROLOGUE; \
132 movl PIC_GOT(AVECNAME(x)),%eax; \
133 PIC_EPILOGUE; \
134 jmpl *(%eax)
135
136#define ARCH_SELECT(x) _START_ENTRY; \
137 .type ASELNAME(x),@function; \
138 ASELNAME(x): \
139 PIC_PROLOGUE; \
140 call PIC_PLT(CNAME(__get_hw_float)); \
141 testl %eax,%eax; \
142 movl PIC_GOT(ANAME(x)),%eax; \
143 jne 8f; \
144 movl PIC_GOT(GNAME(x)),%eax; \
145 8: \
146 movl PIC_GOT(AVECNAME(x)),%edx; \
147 movl %eax,(%edx); \
148 PIC_EPILOGUE; \
149 jmpl *%eax
150#else /* !PIC */
151#define ARCH_DISPATCH(x) \
152 _START_ENTRY; \
153 .globl CNAME(x); .type CNAME(x),@function; CNAME(x): ; \
154 jmpl *AVECNAME(x)
155
156#define ARCH_SELECT(x) _START_ENTRY; \
157 .type ASELNAME(x),@function; \
158 ASELNAME(x): \
159 call CNAME(__get_hw_float); \
160 testl %eax,%eax; \
161 movl $ANAME(x),%eax; \
162 jne 8f; \
163 movl $GNAME(x),%eax; \
164 8: \
165 movl %eax,AVECNAME(x); \
166 jmpl *%eax
167#endif /* PIC */
168
169#define ARCH_VECTOR(x) .data; .p2align 2; \
170 .globl AVECNAME(x); \
171 .type AVECNAME(x),@object; \
172 .size AVECNAME(x),4; \
173 AVECNAME(x): .long ASELNAME(x)
174
175#undef _ENTRY
176#define _ENTRY(x) ARCH_VECTOR(x); ARCH_SELECT(x); ARCH_DISPATCH(x); \
177 _START_ENTRY; \
178 .globl ANAME(x); .type ANAME(x),@function; ANAME(x):
179
180#endif /* _ARCH_INDIRECT */
181
182#endif /* !_MACHINE_ASM_H_ */