1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or https://opensource.org/licenses/CDDL-1.0. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _IA32_SYS_ASM_LINKAGE_H 28 #define _IA32_SYS_ASM_LINKAGE_H 29 30 #if defined(_KERNEL) && defined(__linux__) 31 #include <linux/linkage.h> 32 #endif 33 34 #ifndef ENDBR 35 #if defined(__ELF__) && defined(__CET__) && defined(__has_include) 36 /* CSTYLED */ 37 #if __has_include(<cet.h>) 38 39 #include <cet.h> 40 41 #ifdef _CET_ENDBR 42 #define ENDBR _CET_ENDBR 43 #endif /* _CET_ENDBR */ 44 45 #endif /* <cet.h> */ 46 #endif /* __ELF__ && __CET__ && __has_include */ 47 #endif /* !ENDBR */ 48 49 #ifndef ENDBR 50 #define ENDBR 51 #endif 52 #ifndef RET 53 #define RET ret 54 #endif 55 56 /* You can set to nothing on Unix platforms */ 57 #undef ASMABI 58 #define ASMABI __attribute__((sysv_abi)) 59 60 #define SECTION_TEXT .text 61 #define SECTION_STATIC .section .rodata 62 63 #ifdef __cplusplus 64 extern "C" { 65 #endif 66 67 #ifdef _ASM /* The remainder of this file is only for assembly files */ 68 69 /* 70 * make annoying differences in assembler syntax go away 71 */ 72 73 /* 74 * D16 and A16 are used to insert instructions prefixes; the 75 * macros help the assembler code be slightly more portable. 76 */ 77 #if !defined(__GNUC_AS__) 78 /* 79 * /usr/ccs/bin/as prefixes are parsed as separate instructions 80 */ 81 #define D16 data16; 82 #define A16 addr16; 83 84 /* 85 * (There are some weird constructs in constant expressions) 86 */ 87 #define _CONST(const) [const] 88 #define _BITNOT(const) -1!_CONST(const) 89 #define _MUL(a, b) _CONST(a \* b) 90 91 #else 92 /* 93 * Why not use the 'data16' and 'addr16' prefixes .. well, the 94 * assembler doesn't quite believe in real mode, and thus argues with 95 * us about what we're trying to do. 96 */ 97 #define D16 .byte 0x66; 98 #define A16 .byte 0x67; 99 100 #define _CONST(const) (const) 101 #define _BITNOT(const) ~_CONST(const) 102 #define _MUL(a, b) _CONST(a * b) 103 104 #endif 105 106 /* 107 * C pointers are different sizes between i386 and amd64. 108 * These constants can be used to compute offsets into pointer arrays. 109 */ 110 #if defined(__amd64) 111 #define CLONGSHIFT 3 112 #define CLONGSIZE 8 113 #define CLONGMASK 7 114 #elif defined(__i386) 115 #define CLONGSHIFT 2 116 #define CLONGSIZE 4 117 #define CLONGMASK 3 118 #endif 119 120 /* 121 * Since we know we're either ILP32 or LP64 .. 122 */ 123 #define CPTRSHIFT CLONGSHIFT 124 #define CPTRSIZE CLONGSIZE 125 #define CPTRMASK CLONGMASK 126 127 #if CPTRSIZE != (1 << CPTRSHIFT) || CLONGSIZE != (1 << CLONGSHIFT) 128 #error "inconsistent shift constants" 129 #endif 130 131 #if CPTRMASK != (CPTRSIZE - 1) || CLONGMASK != (CLONGSIZE - 1) 132 #error "inconsistent mask constants" 133 #endif 134 135 #define ASM_ENTRY_ALIGN 16 136 137 /* 138 * SSE register alignment and save areas 139 */ 140 141 #define XMM_SIZE 16 142 #define XMM_ALIGN 16 143 144 /* 145 * ENTRY provides the standard procedure entry code and an easy way to 146 * insert the calls to mcount for profiling. ENTRY_NP is identical, but 147 * never calls mcount. 148 */ 149 #undef ENTRY 150 #define ENTRY(x) \ 151 .text; \ 152 .balign ASM_ENTRY_ALIGN; \ 153 .globl x; \ 154 .type x, @function; \ 155 x: MCOUNT(x) 156 157 #define ENTRY_NP(x) \ 158 .text; \ 159 .balign ASM_ENTRY_ALIGN; \ 160 .globl x; \ 161 .type x, @function; \ 162 x: 163 164 #define ENTRY_ALIGN(x, a) \ 165 .text; \ 166 .balign a; \ 167 .globl x; \ 168 .type x, @function; \ 169 x: 170 171 #define FUNCTION(x) \ 172 .type x, @function; \ 173 x: 174 175 /* 176 * ENTRY2 is identical to ENTRY but provides two labels for the entry point. 177 */ 178 #define ENTRY2(x, y) \ 179 .text; \ 180 .balign ASM_ENTRY_ALIGN; \ 181 .globl x, y; \ 182 .type x, @function; \ 183 .type y, @function; \ 184 x:; \ 185 y: MCOUNT(x) 186 187 #define ENTRY_NP2(x, y) \ 188 .text; \ 189 .balign ASM_ENTRY_ALIGN; \ 190 .globl x, y; \ 191 .type x, @function; \ 192 .type y, @function; \ 193 x:; \ 194 y: 195 196 197 /* 198 * SET_SIZE trails a function and set the size for the ELF symbol table. 199 */ 200 #define SET_SIZE(x) \ 201 .size x, [.-x] 202 203 #define SET_OBJ(x) .type x, @object 204 205 206 #endif /* _ASM */ 207 208 #ifdef __cplusplus 209 } 210 #endif 211 212 #endif /* _IA32_SYS_ASM_LINKAGE_H */ 213