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(__POWERPC__) || defined(__powerpc__) || defined(__ppc__) 32 #define SEPARATOR @ 33 #elif defined(__arm64__) 34 #define SEPARATOR %% 35 #else 36 #define SEPARATOR ; 37 #endif 38 39 #define GLUE2(a, b) a ## b 40 #define GLUE(a, b) GLUE2(a, b) 41 #define SYMBOL_NAME(name) GLUE(__USER_LABEL_PREFIX__, name) 42 43 #if defined(__APPLE__) 44 45 #define SYMBOL_IS_FUNC(name) 46 #define EXPORT_SYMBOL(name) 47 #define HIDDEN_SYMBOL(name) .private_extern name 48 #define NO_EXEC_STACK_DIRECTIVE 49 50 #elif defined(__ELF__) 51 52 #if defined(__arm__) 53 #define SYMBOL_IS_FUNC(name) .type name,%function 54 #else 55 #define SYMBOL_IS_FUNC(name) .type name,@function 56 #endif 57 #define EXPORT_SYMBOL(name) 58 #define HIDDEN_SYMBOL(name) .hidden name 59 60 #if defined(__GNU__) || defined(__FreeBSD__) || defined(__Fuchsia__) || \ 61 defined(__linux__) 62 #define NO_EXEC_STACK_DIRECTIVE .section .note.GNU-stack,"",%progbits 63 #else 64 #define NO_EXEC_STACK_DIRECTIVE 65 #endif 66 67 #elif defined(_WIN32) 68 69 #define SYMBOL_IS_FUNC(name) \ 70 .def name SEPARATOR \ 71 .scl 2 SEPARATOR \ 72 .type 32 SEPARATOR \ 73 .endef 74 #define EXPORT_SYMBOL2(name) \ 75 .section .drectve,"yn" SEPARATOR \ 76 .ascii "-export:", #name, "\0" SEPARATOR \ 77 .text 78 #if defined(_LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS) 79 #define EXPORT_SYMBOL(name) 80 #else 81 #define EXPORT_SYMBOL(name) EXPORT_SYMBOL2(name) 82 #endif 83 #define HIDDEN_SYMBOL(name) 84 85 #define NO_EXEC_STACK_DIRECTIVE 86 87 #elif defined(__sparc__) 88 89 #else 90 91 #error Unsupported target 92 93 #endif 94 95 #define DEFINE_LIBUNWIND_FUNCTION(name) \ 96 .globl SYMBOL_NAME(name) SEPARATOR \ 97 EXPORT_SYMBOL(name) SEPARATOR \ 98 SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \ 99 SYMBOL_NAME(name): 100 101 #define DEFINE_LIBUNWIND_PRIVATE_FUNCTION(name) \ 102 .globl SYMBOL_NAME(name) SEPARATOR \ 103 HIDDEN_SYMBOL(SYMBOL_NAME(name)) SEPARATOR \ 104 SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \ 105 SYMBOL_NAME(name): 106 107 #if defined(__arm__) 108 #if !defined(__ARM_ARCH) 109 #define __ARM_ARCH 4 110 #endif 111 112 #if defined(__ARM_ARCH_4T__) || __ARM_ARCH >= 5 113 #define ARM_HAS_BX 114 #endif 115 116 #ifdef ARM_HAS_BX 117 #define JMP(r) bx r 118 #else 119 #define JMP(r) mov pc, r 120 #endif 121 #endif /* __arm__ */ 122 123 #endif /* UNWIND_ASSEMBLY_H */ 124