1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1990 The Regents of the University of California.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * William Jolitz.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * from: @(#)DEFS.h 5.1 (Berkeley) 4/23/90
35 * $FreeBSD$
36 */
37
38 #ifdef __i386__
39 #include <i386/asm.h>
40 #else /* !__i386__ */
41
42 #ifndef _MACHINE_ASM_H_
43 #define _MACHINE_ASM_H_
44
45 #include <sys/cdefs.h>
46
47 #ifdef PIC
48 #define PIC_PLT(x) x@PLT
49 #define PIC_GOT(x) x@GOTPCREL(%rip)
50 #else
51 #define PIC_PLT(x) x
52 #endif
53
54 /*
55 * CNAME and HIDENAME manage the relationship between symbol names in C
56 * and the equivalent assembly language names. CNAME is given a name as
57 * it would be used in a C program. It expands to the equivalent assembly
58 * language name. HIDENAME is given an assembly-language name, and expands
59 * to a possibly-modified form that will be invisible to C programs.
60 */
61 #define CNAME(csym) csym
62 #define HIDENAME(asmsym) .asmsym
63
64 #define _START_ENTRY .text; .p2align 4,0x90
65
66 #define _ENTRY(x) _START_ENTRY; \
67 .globl CNAME(x); .type CNAME(x),@function; CNAME(x):; \
68 .cfi_startproc
69
70 #ifdef PROF
71 #define ALTENTRY(x) _ENTRY(x); \
72 pushq %rbp; \
73 .cfi_def_cfa_offset 16; \
74 .cfi_offset %rbp, -16; \
75 movq %rsp,%rbp; \
76 call PIC_PLT(HIDENAME(mcount)); \
77 popq %rbp; \
78 .cfi_restore %rbp; \
79 .cfi_def_cfa_offset 8; \
80 jmp 9f
81 #define ENTRY(x) _ENTRY(x); \
82 pushq %rbp; \
83 .cfi_def_cfa_offset 16; \
84 .cfi_offset %rbp, -16; \
85 movq %rsp,%rbp; \
86 call PIC_PLT(HIDENAME(mcount)); \
87 popq %rbp; \
88 .cfi_restore %rbp; \
89 .cfi_def_cfa_offset 8; \
90 9:
91 #else
92 #define ALTENTRY(x) _ENTRY(x)
93 #define ENTRY(x) _ENTRY(x)
94 #endif
95
96 #define END(x) .size x, . - x; .cfi_endproc
97 /*
98 * WEAK_REFERENCE(): create a weak reference alias from sym.
99 * The macro is not a general asm macro that takes arbitrary names,
100 * but one that takes only C names. It does the non-null name
101 * translation inside the macro.
102 */
103 #define WEAK_REFERENCE(sym, alias) \
104 .weak CNAME(alias); \
105 .equ CNAME(alias),CNAME(sym)
106
107 #define RCSID(x) .text; .asciz x
108
109 #undef __FBSDID
110 #if !defined(STRIP_FBSDID)
111 #define __FBSDID(s) .ident s
112 #else
113 #define __FBSDID(s) /* nothing */
114 #endif /* !STRIP_FBSDID */
115
116 #endif /* !_MACHINE_ASM_H_ */
117
118 #endif /* __i386__ */
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