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