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 */ 36 37 #ifdef __i386__ 38 #include <i386/asm.h> 39 #else /* !__i386__ */ 40 41 #ifndef _MACHINE_ASM_H_ 42 #define _MACHINE_ASM_H_ 43 44 #include <sys/cdefs.h> 45 46 #ifdef PIC 47 #define PIC_PLT(x) x@PLT 48 #define PIC_GOT(x) x@GOTPCREL(%rip) 49 #else 50 #define PIC_PLT(x) x 51 #endif 52 53 /* 54 * CNAME and HIDENAME manage the relationship between symbol names in C 55 * and the equivalent assembly language names. CNAME is given a name as 56 * it would be used in a C program. It expands to the equivalent assembly 57 * language name. HIDENAME is given an assembly-language name, and expands 58 * to a possibly-modified form that will be invisible to C programs. 59 */ 60 #define CNAME(csym) csym 61 #define HIDENAME(asmsym) .asmsym 62 63 #define _START_ENTRY .text; .p2align 4,0x90 64 65 #define _ENTRY(x) _START_ENTRY; \ 66 .globl CNAME(x); .type CNAME(x),@function; CNAME(x):; \ 67 .cfi_startproc 68 69 #ifdef PROF 70 #define ALTENTRY(x) _ENTRY(x); \ 71 pushq %rbp; \ 72 .cfi_def_cfa_offset 16; \ 73 .cfi_offset %rbp, -16; \ 74 movq %rsp,%rbp; \ 75 call PIC_PLT(HIDENAME(mcount)); \ 76 popq %rbp; \ 77 .cfi_restore %rbp; \ 78 .cfi_def_cfa_offset 8; \ 79 jmp 9f 80 #define ENTRY(x) _ENTRY(x); \ 81 pushq %rbp; \ 82 .cfi_def_cfa_offset 16; \ 83 .cfi_offset %rbp, -16; \ 84 movq %rsp,%rbp; \ 85 call PIC_PLT(HIDENAME(mcount)); \ 86 popq %rbp; \ 87 .cfi_restore %rbp; \ 88 .cfi_def_cfa_offset 8; \ 89 9: 90 #else 91 #define ALTENTRY(x) _ENTRY(x) 92 #define ENTRY(x) _ENTRY(x) 93 #endif 94 95 #define END(x) .size x, . - x; .cfi_endproc 96 /* 97 * WEAK_REFERENCE(): create a weak reference alias from sym. 98 * The macro is not a general asm macro that takes arbitrary names, 99 * but one that takes only C names. It does the non-null name 100 * translation inside the macro. 101 */ 102 #define WEAK_REFERENCE(sym, alias) \ 103 .weak CNAME(alias); \ 104 .equ CNAME(alias),CNAME(sym) 105 106 #define RCSID(x) .text; .asciz x 107 108 #undef __FBSDID 109 #if !defined(STRIP_FBSDID) 110 #define __FBSDID(s) .ident s 111 #else 112 #define __FBSDID(s) /* nothing */ 113 #endif /* !STRIP_FBSDID */ 114 115 #endif /* !_MACHINE_ASM_H_ */ 116 117 #endif /* __i386__ */ 118