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Diffstat (limited to 'toolkit/crashreporter/google-breakpad/src/common/arm_ex_reader.h')
| -rw-r--r-- | toolkit/crashreporter/google-breakpad/src/common/arm_ex_reader.h | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/toolkit/crashreporter/google-breakpad/src/common/arm_ex_reader.h b/toolkit/crashreporter/google-breakpad/src/common/arm_ex_reader.h new file mode 100644 index 0000000000..9b54e8a0be --- /dev/null +++ b/toolkit/crashreporter/google-breakpad/src/common/arm_ex_reader.h @@ -0,0 +1,114 @@ +/* libunwind - a platform-independent unwind library + Copyright 2011 Linaro Limited + +This file is part of libunwind. + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be +included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE +LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ + +// Copyright (c) 2010 Google Inc. +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + + +// Derived from libunwind, with extensive modifications. + +#ifndef COMMON_ARM_EX_READER_H__ +#define COMMON_ARM_EX_READER_H__ + +#include "common/arm_ex_to_module.h" +#include "common/memory_range.h" + +namespace arm_ex_reader { + +// This class is a reader for ARM unwind information +// from .ARM.exidx and .ARM.extab sections. +class ExceptionTableInfo { + public: + ExceptionTableInfo(const char* exidx, size_t exidx_size, + const char* extab, size_t extab_size, + uint32_t text_last_svma, + arm_ex_to_module::ARMExToModule* handler, + const char* mapping_addr, + uint32_t loading_addr) + : mr_exidx_(google_breakpad::MemoryRange(exidx, exidx_size)), + mr_extab_(google_breakpad::MemoryRange(extab, extab_size)), + text_last_svma_(text_last_svma), + handler_(handler), mapping_addr_(mapping_addr), + loading_addr_(loading_addr) { } + + ~ExceptionTableInfo() { } + + // Parses the entries in .ARM.exidx and possibly + // in .ARM.extab tables, reports what we find to + // arm_ex_to_module::ARMExToModule. + void Start(); + + private: + google_breakpad::MemoryRange mr_exidx_; + google_breakpad::MemoryRange mr_extab_; + uint32_t text_last_svma_; + arm_ex_to_module::ARMExToModule* handler_; + const char* mapping_addr_; + uint32_t loading_addr_; + + enum ExExtractResult { + ExSuccess, // success + ExInBufOverflow, // out-of-range while reading .exidx + ExOutBufOverflow, // output buffer is too small + ExCantUnwind, // this function is marked CANT_UNWIND + ExCantRepresent, // entry valid, but we can't represent it + ExInvalid // entry is invalid + }; + ExExtractResult + ExtabEntryExtract(const struct arm_ex_to_module::exidx_entry* entry, + uint8_t* buf, size_t buf_size, + size_t* buf_used); + + int ExtabEntryDecode(const uint8_t* buf, size_t buf_size); +}; + +} // namespace arm_ex_reader + +#endif // COMMON_ARM_EX_READER_H__ |