54387eef07
Currently libunwind is built to support cross-unwinding [1] by default, which requires the buffers unw_context_t and unw_cursor_t to be large enough to hold the vritual register set (VRS) of any supported architecture. This is not desirable for some platforms where the stack usage of the unwinder needs to be kept to a minimum (e.g. bare-metal targets). The current patch introduces a native-only (-DLIBUNWIND_ENABLE_CROSS_UNWINDING=OFF) unwinder variant that adopts strict sizes for the buffers unw_context_t and unw_cursor_t depending on the target architecture. [1] http://www.nongnu.org/libunwind/man/libunwind(3).html#section_4 Change-Id: I380fff9a56c16a0fc520e3b1d8454a34b4a48373 llvm-svn: 270692
60 lines
1.8 KiB
C
60 lines
1.8 KiB
C
//===------------------------- __libunwind_config.h -----------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef ____LIBUNWIND_CONFIG_H__
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#define ____LIBUNWIND_CONFIG_H__
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#if defined(__arm__) && !defined(__USING_SJLJ_EXCEPTIONS__) && \
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!defined(__ARM_DWARF_EH__)
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#define _LIBUNWIND_ARM_EHABI 1
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#else
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#define _LIBUNWIND_ARM_EHABI 0
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#endif
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#if defined(_LIBUNWIND_IS_NATIVE_ONLY)
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# if defined(__i386__)
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# define _LIBUNWIND_TARGET_I386 1
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# define _LIBUNWIND_CONTEXT_SIZE 8
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# define _LIBUNWIND_CURSOR_SIZE 19
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# elif defined(__x86_64__)
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# define _LIBUNWIND_TARGET_X86_64 1
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# define _LIBUNWIND_CONTEXT_SIZE 21
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# define _LIBUNWIND_CURSOR_SIZE 33
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# elif defined(__ppc__)
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# define _LIBUNWIND_TARGET_PPC 1
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# define _LIBUNWIND_CONTEXT_SIZE 117
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# define _LIBUNWIND_CURSOR_SIZE 128
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# elif defined(__aarch64__)
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# define _LIBUNWIND_TARGET_AARCH64 1
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# define _LIBUNWIND_CONTEXT_SIZE 66
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# define _LIBUNWIND_CURSOR_SIZE 78
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# elif defined(__arm__)
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# define _LIBUNWIND_TARGET_ARM 1
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# define _LIBUNWIND_CONTEXT_SIZE 60
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# define _LIBUNWIND_CURSOR_SIZE 67
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# elif defined(__or1k__)
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# define _LIBUNWIND_TARGET_OR1K 1
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# define _LIBUNWIND_CONTEXT_SIZE 16
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# define _LIBUNWIND_CURSOR_SIZE 28
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# else
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# error "Unsupported architecture."
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# endif
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#else // !_LIBUNWIND_IS_NATIVE_ONLY
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# define _LIBUNWIND_TARGET_I386 1
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# define _LIBUNWIND_TARGET_X86_64 1
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# define _LIBUNWIND_TARGET_PPC 1
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# define _LIBUNWIND_TARGET_AARCH64 1
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# define _LIBUNWIND_TARGET_ARM 1
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# define _LIBUNWIND_TARGET_OR1K 1
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# define _LIBUNWIND_CONTEXT_SIZE 128
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# define _LIBUNWIND_CURSOR_SIZE 140
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#endif // _LIBUNWIND_IS_NATIVE_ONLY
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#endif // ____LIBUNWIND_CONFIG_H__
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