1/* $OpenBSD: asm.h,v 1.19 2024/03/29 21:05:34 miod Exp $ */
2/* $NetBSD: asm.h,v 1.15 2000/08/02 22:24:39 eeh Exp $ */
3
4/*
5 * Copyright (c) 1994 Allen Briggs
6 * All rights reserved.
7 *
8 * Gleaned from locore.s and sun3 asm.h which had the following copyrights:
9 * locore.s:
10 * Copyright (c) 1988 University of Utah.
11 * Copyright (c) 1982, 1990 The Regents of the University of California.
12 * sun3/include/asm.h:
13 * Copyright (c) 1993 Adam Glass
14 * Copyright (c) 1990 The Regents of the University of California.
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 * 1. Redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution.
24 * 3. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 */
40
41#ifndef _MACHINE_ASM_H_
42#define _MACHINE_ASM_H_
43
44/* Pull in CC64FSZ and BIAS from frame.h */
45#include <machine/frame.h>
46
47#define _C_LABEL(name) name
48#define _ASM_LABEL(name) name
49
50#ifdef __PIC__
51/*
52 * PIC_PROLOGUE() is akin to the compiler generated function prologue for
53 * PIC code. It leaves the address of the Global Offset Table in DEST,
54 * clobbering register TMP in the process. Using the temporary enables us
55 * to work without a stack frame (doing so requires saving %o7) .
56 */
57#define PIC_PROLOGUE(dest,tmp) \
58 sethi %hi(_GLOBAL_OFFSET_TABLE_-4),dest; \
59 rd %pc, tmp; \
60 or dest,%lo(_GLOBAL_OFFSET_TABLE_+4),dest; \
61 add dest,tmp,dest
62#else
63#define PIC_PROLOGUE(dest,tmp)
64#endif
65
66#define FTYPE(x) .type x,@function
67#define OTYPE(x) .type x,@object
68
69#define _ENTRY_NB(name) \
70 .align 4; .proc 1; FTYPE(name); name:
71#define _ENTRY(name) .globl name; _ENTRY_NB(name)
72
73#if defined(PROF) || defined(GPROF)
74#define _PROF_PROLOGUE \
75 .data; .align 8; 1: .uaword 0; .uaword 0; \
76 .text; save %sp,-CC64FSZ,%sp; sethi %hi(1b),%o0; call _mcount; \
77 or %o0,%lo(1b),%o0; restore
78#else
79#define _PROF_PROLOGUE
80#endif
81
82#define ENTRY(name) _ENTRY(name); _PROF_PROLOGUE
83#define NENTRY(name) _ENTRY(name)
84#define ENTRY_NB(name) _ENTRY_NB(name); _PROF_PROLOGUE
85#define ASENTRY(name) _ENTRY(name); _PROF_PROLOGUE
86#define FUNC(name) ASENTRY(name)
87#define END(y) .size y, . - y
88
89#define STRONG_ALIAS(alias,sym) \
90 .global alias; \
91 alias = sym
92#define WEAK_ALIAS(alias,sym) \
93 .weak alias; \
94 alias = sym
95
96#endif /* _MACHINE_ASM_H_ */