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