2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1990 The Regents of the University of California.
7 * This code is derived from software contributed to Berkeley by
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34 * from: @(#)DEFS.h 5.1 (Berkeley) 4/23/90
35 * from: FreeBSD: src/sys/i386/include/asm.h,v 1.7 2000/01/25
39 #ifndef _MACHINE_ASM_H_
40 #define _MACHINE_ASM_H_
44 #include <sys/cdefs.h>
47 #define PIC_PROLOGUE(r1, r2) \
48 sethi %hi(_GLOBAL_OFFSET_TABLE_-4), r1 ; \
50 or r1, %lo(_GLOBAL_OFFSET_TABLE_+4), r1 ; \
52 #define SET(name, r1, r2) \
56 #define PIC_PROLOGUE(r1, r2)
57 #define SET(name, r1, r2) \
62 * CNAME and HIDENAME manage the relationship between symbol names in C
63 * and the equivalent assembly language names. CNAME is given a name as
64 * it would be used in a C program. It expands to the equivalent assembly
65 * language name. HIDENAME is given an assembly-language name, and expands
66 * to a possibly-modified form that will be invisible to C programs.
68 #define CNAME(csym) csym
69 #define HIDENAME(asmsym) __CONCAT(.,asmsym)
74 #define _ALIGN_TEXT .align 32
76 #define _START_ENTRY \
81 * Define function entry and alternate entry points.
83 * The compiler produces #function for the .type pseudo-op, but the '#'
84 * character has special meaning in cpp macros, so we use @function like
85 * other architectures. The assembler seems to accept both.
86 * The assembler also accepts a .proc pseudo-op, which is used by the
87 * peep hole optimizer, whose argument is the type code of the return
88 * value. Since this is difficult to predict and its expected that
89 * assembler code is already optimized, we leave it out.
92 #define _ALTENTRY(x) \
94 .type CNAME(x),@function ; \
100 .type CNAME(x),@function ; \
103 #define ALTENTRY(x) _ALTENTRY(x)
104 #define ENTRY(x) _ENTRY(x)
105 #define END(x) .size x, . - x
108 * WEAK_REFERENCE(): create a weak reference alias from sym.
109 * The macro is not a general asm macro that takes arbitrary names,
110 * but one that takes only C names. It does the non-null name
111 * translation inside the macro.
113 #define WEAK_REFERENCE(sym, alias) \
114 .weak CNAME(alias); \
115 .equ CNAME(alias),CNAME(sym)
118 * Kernel RCS ID tag and copyright macros
122 #if !defined(lint) && !defined(STRIP_FBSDID)
123 #define __FBSDID(s) .ident s
125 #define __FBSDID(s) /* nothing */
126 #endif /* not lint and not STRIP_FBSDID */
128 #endif /* !_MACHINE_ASM_H_ */