905af40cc6
Clang integrated assembler was unable to build libunwind PPC32 assembly code, present in functions used to save/restore register context. This change consists in replacing the assembly style used in libunwind source, to one that is compatible with both Clang integrated assembler as well as GNU assembler. Patch by Leandro Lupori! Differential Revision: https://reviews.llvm.org/D61792 llvm-svn: 360862
159 lines
5.2 KiB
C
159 lines
5.2 KiB
C
/* ===-- assembly.h - libUnwind assembler support macros -------------------===
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*
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* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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* See https://llvm.org/LICENSE.txt for license information.
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* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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*
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* ===----------------------------------------------------------------------===
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*
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* This file defines macros for use in libUnwind assembler source.
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* This file is not part of the interface of this library.
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*
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* ===----------------------------------------------------------------------===
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*/
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#ifndef UNWIND_ASSEMBLY_H
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#define UNWIND_ASSEMBLY_H
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#if defined(__powerpc64__)
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#define SEPARATOR ;
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#define PPC64_OFFS_SRR0 0
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#define PPC64_OFFS_CR 272
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#define PPC64_OFFS_XER 280
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#define PPC64_OFFS_LR 288
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#define PPC64_OFFS_CTR 296
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#define PPC64_OFFS_VRSAVE 304
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#define PPC64_OFFS_FP 312
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#define PPC64_OFFS_V 824
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#ifdef _ARCH_PWR8
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#define PPC64_HAS_VMX
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#endif
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#elif defined(__arm64__)
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#define SEPARATOR %%
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#else
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#define SEPARATOR ;
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#endif
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#if defined(__powerpc64__) && (!defined(_CALL_ELF) || _CALL_ELF == 1)
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#define PPC64_OPD1 .section .opd,"aw",@progbits SEPARATOR
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#define PPC64_OPD2 SEPARATOR \
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.p2align 3 SEPARATOR \
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.quad .Lfunc_begin0 SEPARATOR \
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.quad .TOC.@tocbase SEPARATOR \
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.quad 0 SEPARATOR \
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.text SEPARATOR \
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.Lfunc_begin0:
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#else
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#define PPC64_OPD1
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#define PPC64_OPD2
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#endif
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#define GLUE2(a, b) a ## b
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#define GLUE(a, b) GLUE2(a, b)
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#define SYMBOL_NAME(name) GLUE(__USER_LABEL_PREFIX__, name)
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#if defined(__APPLE__)
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#define SYMBOL_IS_FUNC(name)
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#define EXPORT_SYMBOL(name)
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#define HIDDEN_SYMBOL(name) .private_extern name
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#define WEAK_SYMBOL(name) .weak_reference name
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#define WEAK_ALIAS(name, aliasname) \
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.globl SYMBOL_NAME(aliasname) SEPARATOR \
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WEAK_SYMBOL(aliasname) SEPARATOR \
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SYMBOL_NAME(aliasname) = SYMBOL_NAME(name)
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#define NO_EXEC_STACK_DIRECTIVE
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#elif defined(__ELF__)
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#if defined(__arm__)
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#define SYMBOL_IS_FUNC(name) .type name,%function
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#else
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#define SYMBOL_IS_FUNC(name) .type name,@function
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#endif
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#define EXPORT_SYMBOL(name)
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#define HIDDEN_SYMBOL(name) .hidden name
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#define WEAK_SYMBOL(name) .weak name
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#define WEAK_ALIAS(name, aliasname) \
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WEAK_SYMBOL(aliasname) SEPARATOR \
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SYMBOL_NAME(aliasname) = SYMBOL_NAME(name)
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#if defined(__GNU__) || defined(__FreeBSD__) || defined(__Fuchsia__) || \
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defined(__linux__)
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#define NO_EXEC_STACK_DIRECTIVE .section .note.GNU-stack,"",%progbits
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#else
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#define NO_EXEC_STACK_DIRECTIVE
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#endif
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#elif defined(_WIN32)
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#define SYMBOL_IS_FUNC(name) \
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.def name SEPARATOR \
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.scl 2 SEPARATOR \
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.type 32 SEPARATOR \
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.endef
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#define EXPORT_SYMBOL2(name) \
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.section .drectve,"yn" SEPARATOR \
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.ascii "-export:", #name, "\0" SEPARATOR \
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.text
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#if defined(_LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS)
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#define EXPORT_SYMBOL(name)
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#else
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#define EXPORT_SYMBOL(name) EXPORT_SYMBOL2(name)
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#endif
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#define HIDDEN_SYMBOL(name)
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#if defined(__MINGW32__)
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#define WEAK_ALIAS(name, aliasname) \
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.globl SYMBOL_NAME(aliasname) SEPARATOR \
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EXPORT_SYMBOL(aliasname) SEPARATOR \
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SYMBOL_NAME(aliasname) = SYMBOL_NAME(name)
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#else
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#define WEAK_ALIAS3(name, aliasname) \
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.section .drectve,"yn" SEPARATOR \
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.ascii "-alternatename:", #aliasname, "=", #name, "\0" SEPARATOR \
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.text
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#define WEAK_ALIAS2(name, aliasname) \
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WEAK_ALIAS3(name, aliasname)
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#define WEAK_ALIAS(name, aliasname) \
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EXPORT_SYMBOL(SYMBOL_NAME(aliasname)) SEPARATOR \
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WEAK_ALIAS2(SYMBOL_NAME(name), SYMBOL_NAME(aliasname))
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#endif
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#define NO_EXEC_STACK_DIRECTIVE
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#elif defined(__sparc__)
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#else
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#error Unsupported target
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#endif
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#define DEFINE_LIBUNWIND_FUNCTION(name) \
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.globl SYMBOL_NAME(name) SEPARATOR \
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HIDDEN_SYMBOL(SYMBOL_NAME(name)) SEPARATOR \
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SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \
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PPC64_OPD1 \
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SYMBOL_NAME(name): \
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PPC64_OPD2
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#if defined(__arm__)
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#if !defined(__ARM_ARCH)
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#define __ARM_ARCH 4
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#endif
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#if defined(__ARM_ARCH_4T__) || __ARM_ARCH >= 5
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#define ARM_HAS_BX
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#endif
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#ifdef ARM_HAS_BX
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#define JMP(r) bx r
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#else
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#define JMP(r) mov pc, r
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#endif
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#endif /* __arm__ */
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#endif /* UNWIND_ASSEMBLY_H */
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