1 /* ===-- assembly.h - compiler-rt assembler support macros -----------------=== 2 * 3 * The LLVM Compiler Infrastructure 4 * 5 * This file is dual licensed under the MIT and the University of Illinois Open 6 * Source Licenses. See LICENSE.TXT for details. 7 * 8 * ===----------------------------------------------------------------------=== 9 * 10 * This file defines macros for use in compiler-rt assembler source. 11 * This file is not part of the interface of this library. 12 * 13 * ===----------------------------------------------------------------------=== 14 */ 15 16 #ifndef COMPILERRT_ASSEMBLY_H 17 #define COMPILERRT_ASSEMBLY_H 18 19 #if defined(__POWERPC__) || defined(__powerpc__) || defined(__ppc__) 20 #define SEPARATOR @ 21 #else 22 #define SEPARATOR ; 23 #endif 24 25 #if defined(__APPLE__) 26 #define HIDDEN(name) .private_extern name 27 #define LOCAL_LABEL(name) L_##name 28 // tell linker it can break up file at label boundaries 29 #define FILE_LEVEL_DIRECTIVE .subsections_via_symbols 30 #define SYMBOL_IS_FUNC(name) 31 #elif defined(__ELF__) 32 #define HIDDEN(name) .hidden name 33 #define LOCAL_LABEL(name) .L_##name 34 #define FILE_LEVEL_DIRECTIVE 35 #if defined(__arm__) 36 #define SYMBOL_IS_FUNC(name) .type name,%function 37 #else 38 #define SYMBOL_IS_FUNC(name) .type name,@function 39 #endif 40 #else 41 #define HIDDEN_DIRECTIVE(name) 42 #define LOCAL_LABEL(name) .L ## name 43 #define SYMBOL_IS_FUNC(name) \ 44 .def name SEPARATOR \ 45 .scl 2 SEPARATOR \ 46 .type 32 SEPARATOR \ 47 .endef 48 #define FILE_LEVEL_DIRECTIVE 49 #endif 50 51 #if defined(__arm__) 52 #ifndef __ARM_ARCH 53 #if defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) || \ 54 defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) || \ 55 defined(__ARM_ARCH_7EM__) 56 #define __ARM_ARCH 7 57 #endif 58 #endif 59 60 #ifndef __ARM_ARCH 61 #if defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || \ 62 defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) || \ 63 defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6ZM__) 64 #define __ARM_ARCH 6 65 #endif 66 #endif 67 68 #ifndef __ARM_ARCH 69 #if defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_5T__) || \ 70 defined(__ARM_ARCH_5TE__) || defined(__ARM_ARCH_5TEJ__) 71 #define __ARM_ARCH 5 72 #endif 73 #endif 74 75 #ifndef __ARM_ARCH 76 #define __ARM_ARCH 4 77 #endif 78 79 #if defined(__ARM_ARCH_4T__) || __ARM_ARCH >= 5 80 #define ARM_HAS_BX 81 #endif 82 #if !defined(__ARM_FEATURE_CLZ) && \ 83 (__ARM_ARCH >= 6 || (__ARM_ARCH == 5 && !defined(__ARM_ARCH_5__))) 84 #define __ARM_FEATURE_CLZ 85 #endif 86 87 #ifdef ARM_HAS_BX 88 #define JMP(r) bx r 89 #define JMPc(r, c) bx##c r 90 #else 91 #define JMP(r) mov pc, r 92 #define JMPc(r, c) mov##c pc, r 93 #endif 94 #endif 95 96 #define GLUE2(a, b) a##b 97 #define GLUE(a, b) GLUE2(a, b) 98 #define SYMBOL_NAME(name) GLUE(__USER_LABEL_PREFIX__, name) 99 100 #ifdef VISIBILITY_HIDDEN 101 #define DECLARE_SYMBOL_VISIBILITY(name) \ 102 HIDDEN(SYMBOL_NAME(name)) SEPARATOR 103 #else 104 #define DECLARE_SYMBOL_VISIBILITY(name) 105 #endif 106 107 #define DEFINE_COMPILERRT_FUNCTION(name) \ 108 FILE_LEVEL_DIRECTIVE SEPARATOR \ 109 .globl SYMBOL_NAME(name) SEPARATOR \ 110 SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \ 111 DECLARE_SYMBOL_VISIBILITY(name) \ 112 SYMBOL_NAME(name): 113 114 #define DEFINE_COMPILERRT_PRIVATE_FUNCTION(name) \ 115 FILE_LEVEL_DIRECTIVE SEPARATOR \ 116 .globl SYMBOL_NAME(name) SEPARATOR \ 117 SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \ 118 HIDDEN(SYMBOL_NAME(name)) SEPARATOR \ 119 SYMBOL_NAME(name): 120 121 #define DEFINE_COMPILERRT_PRIVATE_FUNCTION_UNMANGLED(name) \ 122 .globl name SEPARATOR \ 123 SYMBOL_IS_FUNC(name) SEPARATOR \ 124 HIDDEN(name) SEPARATOR \ 125 name: 126 127 #define DEFINE_COMPILERRT_FUNCTION_ALIAS(name, target) \ 128 .globl SYMBOL_NAME(name) SEPARATOR \ 129 SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \ 130 .set SYMBOL_NAME(name), SYMBOL_NAME(target) SEPARATOR 131 132 #if defined(__ARM_EABI__) 133 #define DEFINE_AEABI_FUNCTION_ALIAS(aeabi_name, name) \ 134 DEFINE_COMPILERRT_FUNCTION_ALIAS(aeabi_name, name) 135 #else 136 #define DEFINE_AEABI_FUNCTION_ALIAS(aeabi_name, name) 137 #endif 138 139 #ifdef __ELF__ 140 #define END_COMPILERRT_FUNCTION(name) \ 141 .size SYMBOL_NAME(name), . - SYMBOL_NAME(name) 142 #else 143 #define END_COMPILERRT_FUNCTION(name) 144 #endif 145 146 #endif /* COMPILERRT_ASSEMBLY_H */ 147
