1/* ===-- assembly.h - libUnwind assembler support macros -------------------=== 2 * 3 * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 * See https://llvm.org/LICENSE.txt for license information. 5 * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 * 7 * ===----------------------------------------------------------------------=== 8 * 9 * This file defines macros for use in libUnwind assembler source. 10 * This file is not part of the interface of this library. 11 * 12 * ===----------------------------------------------------------------------=== 13 */ 14 15#ifndef UNWIND_ASSEMBLY_H 16#define UNWIND_ASSEMBLY_H 17 18#if defined(__powerpc64__) 19#define SEPARATOR ; 20#define PPC64_OFFS_SRR0 0 21#define PPC64_OFFS_CR 272 22#define PPC64_OFFS_XER 280 23#define PPC64_OFFS_LR 288 24#define PPC64_OFFS_CTR 296 25#define PPC64_OFFS_VRSAVE 304 26#define PPC64_OFFS_FP 312 27#define PPC64_OFFS_V 824 28#ifdef _ARCH_PWR8 29#define PPC64_HAS_VMX 30#endif 31#elif defined(__arm64__) 32#define SEPARATOR %% 33#else 34#define SEPARATOR ; 35#endif 36 37#if defined(__powerpc64__) && (!defined(_CALL_ELF) || _CALL_ELF == 1) 38#define PPC64_OPD1 .section .opd,"aw",@progbits SEPARATOR 39#define PPC64_OPD2 SEPARATOR \ 40 .p2align 3 SEPARATOR \ 41 .quad .Lfunc_begin0 SEPARATOR \ 42 .quad .TOC.@tocbase SEPARATOR \ 43 .quad 0 SEPARATOR \ 44 .text SEPARATOR \ 45.Lfunc_begin0: 46#else 47#define PPC64_OPD1 48#define PPC64_OPD2 49#endif 50 51#define GLUE2(a, b) a ## b 52#define GLUE(a, b) GLUE2(a, b) 53#define SYMBOL_NAME(name) GLUE(__USER_LABEL_PREFIX__, name) 54 55#if defined(__APPLE__) 56 57#define SYMBOL_IS_FUNC(name) 58#define EXPORT_SYMBOL(name) 59#define HIDDEN_SYMBOL(name) .private_extern name 60#define WEAK_SYMBOL(name) .weak_reference name 61#define WEAK_ALIAS(name, aliasname) \ 62 .globl SYMBOL_NAME(aliasname) SEPARATOR \ 63 WEAK_SYMBOL(aliasname) SEPARATOR \ 64 SYMBOL_NAME(aliasname) = SYMBOL_NAME(name) 65 66#define NO_EXEC_STACK_DIRECTIVE 67 68#elif defined(__ELF__) 69 70#if defined(__arm__) 71#define SYMBOL_IS_FUNC(name) .type name,%function 72#else 73#define SYMBOL_IS_FUNC(name) .type name,@function 74#endif 75#define EXPORT_SYMBOL(name) 76#define HIDDEN_SYMBOL(name) .hidden name 77#define WEAK_SYMBOL(name) .weak name 78#define WEAK_ALIAS(name, aliasname) \ 79 WEAK_SYMBOL(aliasname) SEPARATOR \ 80 SYMBOL_NAME(aliasname) = SYMBOL_NAME(name) 81 82#if defined(__GNU__) || defined(__FreeBSD__) || defined(__Fuchsia__) || \ 83 defined(__linux__) 84#define NO_EXEC_STACK_DIRECTIVE .section .note.GNU-stack,"",%progbits 85#else 86#define NO_EXEC_STACK_DIRECTIVE 87#endif 88 89#elif defined(_WIN32) 90 91#define SYMBOL_IS_FUNC(name) \ 92 .def name SEPARATOR \ 93 .scl 2 SEPARATOR \ 94 .type 32 SEPARATOR \ 95 .endef 96#define EXPORT_SYMBOL2(name) \ 97 .section .drectve,"yn" SEPARATOR \ 98 .ascii "-export:", #name, "\0" SEPARATOR \ 99 .text 100#if defined(_LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS) 101#define EXPORT_SYMBOL(name) 102#else 103#define EXPORT_SYMBOL(name) EXPORT_SYMBOL2(name) 104#endif 105#define HIDDEN_SYMBOL(name) 106 107#if defined(__MINGW32__) 108#define WEAK_ALIAS(name, aliasname) \ 109 .globl SYMBOL_NAME(aliasname) SEPARATOR \ 110 EXPORT_SYMBOL(aliasname) SEPARATOR \ 111 SYMBOL_NAME(aliasname) = SYMBOL_NAME(name) 112#else 113#define WEAK_ALIAS3(name, aliasname) \ 114 .section .drectve,"yn" SEPARATOR \ 115 .ascii "-alternatename:", #aliasname, "=", #name, "\0" SEPARATOR \ 116 .text 117#define WEAK_ALIAS2(name, aliasname) \ 118 WEAK_ALIAS3(name, aliasname) 119#define WEAK_ALIAS(name, aliasname) \ 120 EXPORT_SYMBOL(SYMBOL_NAME(aliasname)) SEPARATOR \ 121 WEAK_ALIAS2(SYMBOL_NAME(name), SYMBOL_NAME(aliasname)) 122#endif 123 124#define NO_EXEC_STACK_DIRECTIVE 125 126#elif defined(__sparc__) 127 128#else 129 130#error Unsupported target 131 132#endif 133 134#define DEFINE_LIBUNWIND_FUNCTION(name) \ 135 .globl SYMBOL_NAME(name) SEPARATOR \ 136 HIDDEN_SYMBOL(SYMBOL_NAME(name)) SEPARATOR \ 137 SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \ 138 PPC64_OPD1 \ 139 SYMBOL_NAME(name): \ 140 PPC64_OPD2 141 142#if defined(__arm__) 143#if !defined(__ARM_ARCH) 144#define __ARM_ARCH 4 145#endif 146 147#if defined(__ARM_ARCH_4T__) || __ARM_ARCH >= 5 148#define ARM_HAS_BX 149#endif 150 151#ifdef ARM_HAS_BX 152#define JMP(r) bx r 153#else 154#define JMP(r) mov pc, r 155#endif 156#endif /* __arm__ */ 157 158#endif /* UNWIND_ASSEMBLY_H */ 159