1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/toolkit/crashreporter/google-breakpad/src/common/arm_ex_reader.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,115 @@
1.4 +
1.5 +/* libunwind - a platform-independent unwind library
1.6 + Copyright 2011 Linaro Limited
1.7 +
1.8 +This file is part of libunwind.
1.9 +
1.10 +Permission is hereby granted, free of charge, to any person obtaining
1.11 +a copy of this software and associated documentation files (the
1.12 +"Software"), to deal in the Software without restriction, including
1.13 +without limitation the rights to use, copy, modify, merge, publish,
1.14 +distribute, sublicense, and/or sell copies of the Software, and to
1.15 +permit persons to whom the Software is furnished to do so, subject to
1.16 +the following conditions:
1.17 +
1.18 +The above copyright notice and this permission notice shall be
1.19 +included in all copies or substantial portions of the Software.
1.20 +
1.21 +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
1.22 +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
1.23 +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
1.24 +NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
1.25 +LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
1.26 +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
1.27 +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
1.28 +
1.29 +// Copyright (c) 2010 Google Inc.
1.30 +// All rights reserved.
1.31 +//
1.32 +// Redistribution and use in source and binary forms, with or without
1.33 +// modification, are permitted provided that the following conditions are
1.34 +// met:
1.35 +//
1.36 +// * Redistributions of source code must retain the above copyright
1.37 +// notice, this list of conditions and the following disclaimer.
1.38 +// * Redistributions in binary form must reproduce the above
1.39 +// copyright notice, this list of conditions and the following disclaimer
1.40 +// in the documentation and/or other materials provided with the
1.41 +// distribution.
1.42 +// * Neither the name of Google Inc. nor the names of its
1.43 +// contributors may be used to endorse or promote products derived from
1.44 +// this software without specific prior written permission.
1.45 +//
1.46 +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
1.47 +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
1.48 +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
1.49 +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
1.50 +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
1.51 +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
1.52 +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
1.53 +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
1.54 +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
1.55 +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
1.56 +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.57 +
1.58 +
1.59 +// Derived from libunwind, with extensive modifications.
1.60 +
1.61 +#ifndef COMMON_ARM_EX_READER_H__
1.62 +#define COMMON_ARM_EX_READER_H__
1.63 +
1.64 +#include "common/arm_ex_to_module.h"
1.65 +#include "common/memory_range.h"
1.66 +
1.67 +namespace arm_ex_reader {
1.68 +
1.69 +// This class is a reader for ARM unwind information
1.70 +// from .ARM.exidx and .ARM.extab sections.
1.71 +class ExceptionTableInfo {
1.72 + public:
1.73 + ExceptionTableInfo(const char* exidx, size_t exidx_size,
1.74 + const char* extab, size_t extab_size,
1.75 + uint32_t text_last_svma,
1.76 + arm_ex_to_module::ARMExToModule* handler,
1.77 + const char* mapping_addr,
1.78 + uint32_t loading_addr)
1.79 + : mr_exidx_(google_breakpad::MemoryRange(exidx, exidx_size)),
1.80 + mr_extab_(google_breakpad::MemoryRange(extab, extab_size)),
1.81 + text_last_svma_(text_last_svma),
1.82 + handler_(handler), mapping_addr_(mapping_addr),
1.83 + loading_addr_(loading_addr) { }
1.84 +
1.85 + ~ExceptionTableInfo() { }
1.86 +
1.87 + // Parses the entries in .ARM.exidx and possibly
1.88 + // in .ARM.extab tables, reports what we find to
1.89 + // arm_ex_to_module::ARMExToModule.
1.90 + void Start();
1.91 +
1.92 + private:
1.93 + google_breakpad::MemoryRange mr_exidx_;
1.94 + google_breakpad::MemoryRange mr_extab_;
1.95 + uint32_t text_last_svma_;
1.96 + arm_ex_to_module::ARMExToModule* handler_;
1.97 + const char* mapping_addr_;
1.98 + uint32_t loading_addr_;
1.99 +
1.100 + enum ExExtractResult {
1.101 + ExSuccess, // success
1.102 + ExInBufOverflow, // out-of-range while reading .exidx
1.103 + ExOutBufOverflow, // output buffer is too small
1.104 + ExCantUnwind, // this function is marked CANT_UNWIND
1.105 + ExCantRepresent, // entry valid, but we can't represent it
1.106 + ExInvalid // entry is invalid
1.107 + };
1.108 + ExExtractResult
1.109 + ExtabEntryExtract(const struct arm_ex_to_module::exidx_entry* entry,
1.110 + uint8_t* buf, size_t buf_size,
1.111 + /*OUT*/size_t* buf_used);
1.112 +
1.113 + int ExtabEntryDecode(const uint8_t* buf, size_t buf_size);
1.114 +};
1.115 +
1.116 +} // namespace arm_ex_reader
1.117 +
1.118 +#endif // COMMON_ARM_EX_READER_H__
