1 /* $OpenBSD: asm.h,v 1.19 2023/02/03 06:13:08 miod Exp $ */ 2 /* $NetBSD: asm.h,v 1.1 1996/09/30 16:34:20 ws Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 6 * Copyright (C) 1995, 1996 TooLs GmbH. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by TooLs GmbH. 20 * 4. The name of TooLs GmbH may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 28 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 29 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 31 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 32 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #ifndef _POWERPC_ASM_H_ 36 #define _POWERPC_ASM_H_ 37 38 #define _C_LABEL(x) x 39 #define _ASM_LABEL(x) x 40 41 #ifdef __STDC__ 42 # define _TMP_LABEL(x) .L_ ## x 43 #else 44 # define _TMP_LABEL(x) .L_/**/x 45 #endif 46 47 #define _ENTRY_NB(x) \ 48 .text; .align 2; .type x,@function; x: 49 #define _ENTRY(x) .globl x; _ENTRY_NB(x) 50 51 #if defined(PROF) || defined(GPROF) 52 # define _PROF_PROLOGUE(y) \ 53 .section ".data"; \ 54 .align 2; \ 55 _TMP_LABEL(y):; \ 56 .long 0; \ 57 .section ".text"; \ 58 mflr 0; \ 59 addis 11, 11, _TMP_LABEL(y)@ha; \ 60 stw 0, 4(1); \ 61 addi 0, 11,_TMP_LABEL(y)@l; \ 62 bl _mcount; 63 #else 64 # define _PROF_PROLOGUE(y) 65 #endif 66 67 #define ENTRY(y) _ENTRY(y); _PROF_PROLOGUE(y) 68 #define ENTRY_NB(y) _ENTRY_NB(y); _PROF_PROLOGUE(y) 69 #define ASENTRY(y) _ENTRY(y); _PROF_PROLOGUE(y) 70 #define END(y) .size y, . - y 71 72 #define STRONG_ALIAS(alias,sym) \ 73 .global alias; .set alias,sym 74 #define WEAK_ALIAS(alias,sym) \ 75 .weak alias; .set alias,sym 76 77 #if defined(_RET_PROTECTOR) 78 # if defined(__PIC__) 79 # define RETGUARD_LOAD_RANDOM(x, reg) \ 80 bcl 20, 31, 66f; \ 81 66: mflr reg; \ 82 addis reg, reg, (__retguard_ ## x - 66b)@ha; \ 83 lwz reg, ((__retguard_ ## x - 66b)@l)(reg) 84 # else 85 # define RETGUARD_LOAD_RANDOM(x, reg) \ 86 lis reg, (__retguard_ ## x)@ha; \ 87 lwz reg, ((__retguard_ ## x)@l)(reg) 88 # endif 89 # define RETGUARD_SETUP(x, reg, retreg) \ 90 mflr retreg; \ 91 RETGUARD_SETUP_LATE(x, reg, retreg) 92 # define RETGUARD_SETUP_LATE(x, reg, retreg) \ 93 RETGUARD_SYMBOL(x); \ 94 RETGUARD_LOAD_RANDOM(x, reg); \ 95 xor reg, reg, retreg 96 # define RETGUARD_CHECK(x, reg, retreg) \ 97 xor reg, reg, retreg; \ 98 RETGUARD_LOAD_RANDOM(x, %r10); \ 99 mtlr retreg; \ 100 twne reg, %r10 101 # define RETGUARD_SAVE(reg, loc) \ 102 stw reg, loc 103 # define RETGUARD_LOAD(reg, loc) \ 104 lwz reg, loc 105 # define RETGUARD_SYMBOL(x) \ 106 .ifndef __retguard_ ## x; \ 107 .hidden __retguard_ ## x; \ 108 .type __retguard_ ## x,@object; \ 109 .pushsection .openbsd.randomdata.retguard,"aw",@progbits; \ 110 .weak __retguard_ ## x; \ 111 .p2align 2; \ 112 __retguard_ ## x: ; \ 113 .long 0; \ 114 .size __retguard_ ## x, 4; \ 115 .popsection; \ 116 .endif 117 #else 118 # define RETGUARD_LOAD_RANDOM(x, reg) 119 # define RETGUARD_SETUP(x, reg, retreg) 120 # define RETGUARD_SETUP_LATE(x, reg, retreg) 121 # define RETGUARD_CHECK(x, reg, retreg) 122 # define RETGUARD_SAVE(reg, loc) 123 # define RETGUARD_LOAD(reg, loc) 124 # define RETGUARD_SYMBOL(x) 125 #endif 126 127 #endif /* !_POWERPC_ASM_H_ */ 128