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
38 #ifndef _MACHINE_ASM_H_
39 #define _MACHINE_ASM_H_
41 #include <sys/cdefs.h>
44 #define PIC_PLT(x) x@PLT
45 #define PIC_GOT(x) x@GOTPCREL(%rip)
51 * CNAME and HIDENAME manage the relationship between symbol names in C
52 * and the equivalent assembly language names. CNAME is given a name as
53 * it would be used in a C program. It expands to the equivalent assembly
54 * language name. HIDENAME is given an assembly-language name, and expands
55 * to a possibly-modified form that will be invisible to C programs.
57 #define CNAME(csym) csym
58 #define HIDENAME(asmsym) .asmsym
60 #define _START_ENTRY .text; .p2align 4,0x90
62 #define _ENTRY(x) _START_ENTRY; \
63 .globl CNAME(x); .type CNAME(x),@function; CNAME(x):
66 #define ALTENTRY(x) _ENTRY(x); \
67 pushq %rbp; movq %rsp,%rbp; \
68 call PIC_PLT(HIDENAME(mcount)); \
71 #define ENTRY(x) _ENTRY(x); \
72 pushq %rbp; movq %rsp,%rbp; \
73 call PIC_PLT(HIDENAME(mcount)); \
77 #define ALTENTRY(x) _ENTRY(x)
78 #define ENTRY(x) _ENTRY(x)
81 #define END(x) .size x, . - x
83 * WEAK_REFERENCE(): create a weak reference alias from sym.
84 * The macro is not a general asm macro that takes arbitrary names,
85 * but one that takes only C names. It does the non-null name
86 * translation inside the macro.
88 #define WEAK_REFERENCE(sym, alias) \
90 .equ CNAME(alias),CNAME(sym)
92 #define RCSID(x) .text; .asciz x
95 #if !defined(STRIP_FBSDID)
96 #define __FBSDID(s) .ident s
98 #define __FBSDID(s) /* nothing */
99 #endif /* !STRIP_FBSDID */
101 #endif /* !_MACHINE_ASM_H_ */