Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 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) |
Stephen Hines | 86277eb | 2015-03-23 12:06:32 -0700 | [diff] [blame] | 31 | #define CONST_SECTION .const |
Stephen Hines | 6d18623 | 2014-11-26 17:56:19 -0800 | [diff] [blame] | 32 | |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 33 | #elif defined(__ELF__) |
Stephen Hines | 6d18623 | 2014-11-26 17:56:19 -0800 | [diff] [blame] | 34 | |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 35 | #define HIDDEN(name) .hidden name |
| 36 | #define LOCAL_LABEL(name) .L_##name |
| 37 | #define FILE_LEVEL_DIRECTIVE |
| 38 | #if defined(__arm__) |
| 39 | #define SYMBOL_IS_FUNC(name) .type name,%function |
| 40 | #else |
| 41 | #define SYMBOL_IS_FUNC(name) .type name,@function |
| 42 | #endif |
Stephen Hines | 86277eb | 2015-03-23 12:06:32 -0700 | [diff] [blame] | 43 | #define CONST_SECTION .section .rodata |
Stephen Hines | 6d18623 | 2014-11-26 17:56:19 -0800 | [diff] [blame] | 44 | |
| 45 | #else // !__APPLE__ && !__ELF__ |
| 46 | |
Stephen Hines | 86277eb | 2015-03-23 12:06:32 -0700 | [diff] [blame] | 47 | #define HIDDEN(name) |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 48 | #define LOCAL_LABEL(name) .L ## name |
Stephen Hines | 6d18623 | 2014-11-26 17:56:19 -0800 | [diff] [blame] | 49 | #define FILE_LEVEL_DIRECTIVE |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 50 | #define SYMBOL_IS_FUNC(name) \ |
| 51 | .def name SEPARATOR \ |
Stephen Hines | 6a211c5 | 2014-07-21 00:49:56 -0700 | [diff] [blame] | 52 | .scl 2 SEPARATOR \ |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 53 | .type 32 SEPARATOR \ |
| 54 | .endef |
Stephen Hines | 86277eb | 2015-03-23 12:06:32 -0700 | [diff] [blame] | 55 | #define CONST_SECTION .section .rdata,"rd" |
Stephen Hines | 6d18623 | 2014-11-26 17:56:19 -0800 | [diff] [blame] | 56 | |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 57 | #endif |
| 58 | |
| 59 | #if defined(__arm__) |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 60 | #if defined(__ARM_ARCH_4T__) || __ARM_ARCH >= 5 |
| 61 | #define ARM_HAS_BX |
| 62 | #endif |
| 63 | #if !defined(__ARM_FEATURE_CLZ) && \ |
| 64 | (__ARM_ARCH >= 6 || (__ARM_ARCH == 5 && !defined(__ARM_ARCH_5__))) |
| 65 | #define __ARM_FEATURE_CLZ |
| 66 | #endif |
| 67 | |
| 68 | #ifdef ARM_HAS_BX |
| 69 | #define JMP(r) bx r |
| 70 | #define JMPc(r, c) bx##c r |
| 71 | #else |
| 72 | #define JMP(r) mov pc, r |
| 73 | #define JMPc(r, c) mov##c pc, r |
| 74 | #endif |
Stephen Hines | 6d18623 | 2014-11-26 17:56:19 -0800 | [diff] [blame] | 75 | |
| 76 | #if __ARM_ARCH_ISA_THUMB == 2 |
| 77 | #define IT(cond) it cond |
| 78 | #define ITT(cond) itt cond |
| 79 | #else |
| 80 | #define IT(cond) |
| 81 | #define ITT(cond) |
| 82 | #endif |
| 83 | |
| 84 | #if __ARM_ARCH_ISA_THUMB == 2 |
| 85 | #define WIDE(op) op.w |
| 86 | #else |
| 87 | #define WIDE(op) op |
| 88 | #endif |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 89 | #endif |
| 90 | |
| 91 | #define GLUE2(a, b) a##b |
| 92 | #define GLUE(a, b) GLUE2(a, b) |
| 93 | #define SYMBOL_NAME(name) GLUE(__USER_LABEL_PREFIX__, name) |
| 94 | |
| 95 | #ifdef VISIBILITY_HIDDEN |
| 96 | #define DECLARE_SYMBOL_VISIBILITY(name) \ |
| 97 | HIDDEN(SYMBOL_NAME(name)) SEPARATOR |
| 98 | #else |
| 99 | #define DECLARE_SYMBOL_VISIBILITY(name) |
| 100 | #endif |
| 101 | |
| 102 | #define DEFINE_COMPILERRT_FUNCTION(name) \ |
| 103 | FILE_LEVEL_DIRECTIVE SEPARATOR \ |
| 104 | .globl SYMBOL_NAME(name) SEPARATOR \ |
| 105 | SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \ |
| 106 | DECLARE_SYMBOL_VISIBILITY(name) \ |
| 107 | SYMBOL_NAME(name): |
| 108 | |
Stephen Hines | 6d18623 | 2014-11-26 17:56:19 -0800 | [diff] [blame] | 109 | #define DEFINE_COMPILERRT_THUMB_FUNCTION(name) \ |
| 110 | FILE_LEVEL_DIRECTIVE SEPARATOR \ |
| 111 | .globl SYMBOL_NAME(name) SEPARATOR \ |
| 112 | SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \ |
| 113 | DECLARE_SYMBOL_VISIBILITY(name) SEPARATOR \ |
| 114 | .thumb_func SEPARATOR \ |
| 115 | SYMBOL_NAME(name): |
| 116 | |
Stephen Hines | 2d1fdb2 | 2014-05-28 23:58:16 -0700 | [diff] [blame] | 117 | #define DEFINE_COMPILERRT_PRIVATE_FUNCTION(name) \ |
| 118 | FILE_LEVEL_DIRECTIVE SEPARATOR \ |
| 119 | .globl SYMBOL_NAME(name) SEPARATOR \ |
| 120 | SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \ |
| 121 | HIDDEN(SYMBOL_NAME(name)) SEPARATOR \ |
| 122 | SYMBOL_NAME(name): |
| 123 | |
| 124 | #define DEFINE_COMPILERRT_PRIVATE_FUNCTION_UNMANGLED(name) \ |
| 125 | .globl name SEPARATOR \ |
| 126 | SYMBOL_IS_FUNC(name) SEPARATOR \ |
| 127 | HIDDEN(name) SEPARATOR \ |
| 128 | name: |
| 129 | |
| 130 | #define DEFINE_COMPILERRT_FUNCTION_ALIAS(name, target) \ |
| 131 | .globl SYMBOL_NAME(name) SEPARATOR \ |
| 132 | SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \ |
| 133 | .set SYMBOL_NAME(name), SYMBOL_NAME(target) SEPARATOR |
| 134 | |
| 135 | #if defined(__ARM_EABI__) |
| 136 | #define DEFINE_AEABI_FUNCTION_ALIAS(aeabi_name, name) \ |
| 137 | DEFINE_COMPILERRT_FUNCTION_ALIAS(aeabi_name, name) |
| 138 | #else |
| 139 | #define DEFINE_AEABI_FUNCTION_ALIAS(aeabi_name, name) |
| 140 | #endif |
| 141 | |
| 142 | #ifdef __ELF__ |
| 143 | #define END_COMPILERRT_FUNCTION(name) \ |
| 144 | .size SYMBOL_NAME(name), . - SYMBOL_NAME(name) |
| 145 | #else |
| 146 | #define END_COMPILERRT_FUNCTION(name) |
| 147 | #endif |
| 148 | |
| 149 | #endif /* COMPILERRT_ASSEMBLY_H */ |