File size: 5,586 Bytes
8ae5fc5 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 | /* ===-- assembly.h - libUnwind assembler support macros -------------------===
*
* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
* See https://llvm.org/LICENSE.txt for license information.
* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
*
* ===----------------------------------------------------------------------===
*
* This file defines macros for use in libUnwind assembler source.
* This file is not part of the interface of this library.
*
* ===----------------------------------------------------------------------===
*/
#ifndef UNWIND_ASSEMBLY_H
#define UNWIND_ASSEMBLY_H
#if defined(__PGIC__) && defined(__linux__)
#define __ELF__
#endif
#if defined(__powerpc64__)
#define SEPARATOR ;
#define PPC64_OFFS_SRR0 0
#define PPC64_OFFS_CR 272
#define PPC64_OFFS_XER 280
#define PPC64_OFFS_LR 288
#define PPC64_OFFS_CTR 296
#define PPC64_OFFS_VRSAVE 304
#define PPC64_OFFS_FP 312
#define PPC64_OFFS_V 824
#ifdef _ARCH_PWR8
#define PPC64_HAS_VMX
#endif
#elif defined(__APPLE__) && defined(__aarch64__)
#define SEPARATOR %%
#else
#define SEPARATOR ;
#endif
#if defined(__powerpc64__) && (!defined(_CALL_ELF) || _CALL_ELF == 1)
#define PPC64_OPD1 .section .opd,"aw",@progbits SEPARATOR
#define PPC64_OPD2 SEPARATOR \
.p2align 3 SEPARATOR \
.quad .Lfunc_begin0 SEPARATOR \
.quad .TOC.@tocbase SEPARATOR \
.quad 0 SEPARATOR \
.text SEPARATOR \
.Lfunc_begin0:
#else
#define PPC64_OPD1
#define PPC64_OPD2
#endif
#define GLUE2(a, b) a ## b
#define GLUE(a, b) GLUE2(a, b)
#define SYMBOL_NAME(name) GLUE(__USER_LABEL_PREFIX__, name)
#if defined(__APPLE__)
#define SYMBOL_IS_FUNC(name)
#define EXPORT_SYMBOL(name)
#define HIDDEN_SYMBOL(name) .private_extern name
#define WEAK_SYMBOL(name) .weak_reference name
#define WEAK_ALIAS(name, aliasname) \
.globl SYMBOL_NAME(aliasname) SEPARATOR \
WEAK_SYMBOL(aliasname) SEPARATOR \
SYMBOL_NAME(aliasname) = SYMBOL_NAME(name)
#define NO_EXEC_STACK_DIRECTIVE
#elif defined(__ELF__)
#if defined(__arm__)
#define SYMBOL_IS_FUNC(name) .type name,%function
#else
#define SYMBOL_IS_FUNC(name) .type name,@function
#endif
#define EXPORT_SYMBOL(name)
#define HIDDEN_SYMBOL(name) .hidden name
#define WEAK_SYMBOL(name) .weak name
#if defined(__hexagon__)
#define WEAK_ALIAS(name, aliasname) \
WEAK_SYMBOL(aliasname) SEPARATOR \
.equiv SYMBOL_NAME(aliasname), SYMBOL_NAME(name)
#else
#define WEAK_ALIAS(name, aliasname) \
WEAK_SYMBOL(aliasname) SEPARATOR \
SYMBOL_NAME(aliasname) = SYMBOL_NAME(name)
#endif
#if defined(__GNU__) || defined(__FreeBSD__) || defined(__Fuchsia__) || \
defined(__linux__)
#define NO_EXEC_STACK_DIRECTIVE .section .note.GNU-stack,"",%progbits
#else
#define NO_EXEC_STACK_DIRECTIVE
#endif
#elif defined(_WIN32)
#define SYMBOL_IS_FUNC(name) \
.def name SEPARATOR \
.scl 2 SEPARATOR \
.type 32 SEPARATOR \
.endef
#define EXPORT_SYMBOL2(name) \
.section .drectve,"yn" SEPARATOR \
.ascii "-export:", #name, "\0" SEPARATOR \
.text
#if defined(_LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS)
#define EXPORT_SYMBOL(name)
#else
#define EXPORT_SYMBOL(name) EXPORT_SYMBOL2(name)
#endif
#define HIDDEN_SYMBOL(name)
#if defined(__MINGW32__)
#define WEAK_ALIAS(name, aliasname) \
.globl SYMBOL_NAME(aliasname) SEPARATOR \
EXPORT_SYMBOL(aliasname) SEPARATOR \
SYMBOL_NAME(aliasname) = SYMBOL_NAME(name)
#else
#define WEAK_ALIAS3(name, aliasname) \
.section .drectve,"yn" SEPARATOR \
.ascii "-alternatename:", #aliasname, "=", #name, "\0" SEPARATOR \
.text
#define WEAK_ALIAS2(name, aliasname) \
WEAK_ALIAS3(name, aliasname)
#define WEAK_ALIAS(name, aliasname) \
EXPORT_SYMBOL(SYMBOL_NAME(aliasname)) SEPARATOR \
WEAK_ALIAS2(SYMBOL_NAME(name), SYMBOL_NAME(aliasname))
#endif
#define NO_EXEC_STACK_DIRECTIVE
#elif defined(__sparc__)
#else
#error Unsupported target
#endif
#define DEFINE_LIBUNWIND_FUNCTION(name) \
.globl SYMBOL_NAME(name) SEPARATOR \
HIDDEN_SYMBOL(SYMBOL_NAME(name)) SEPARATOR \
SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \
PPC64_OPD1 \
SYMBOL_NAME(name): \
PPC64_OPD2
#if defined(__arm__)
#if !defined(__ARM_ARCH)
#define __ARM_ARCH 4
#endif
#if defined(__ARM_ARCH_4T__) || __ARM_ARCH >= 5
#define ARM_HAS_BX
#endif
#ifdef ARM_HAS_BX
#define JMP(r) bx r
#else
#define JMP(r) mov pc, r
#endif
#endif /* __arm__ */
#endif /* UNWIND_ASSEMBLY_H */
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