194d650536
The AuxVector class is responsible for holding Process data. The data that it holds is normally setup by an OS kernel in the process address space. The purpose behind doing this is to pass in information that the process will need for various reasons. (Check out the enum in the header file for an idea of what the AuxVector holds.) The AuxVector struct was changed into a class and encapsulation methods were added to protect access to the member variables. The host ISA may have a different endianness than the simulated ISA. Since data is passed between the process address space and the simulator for auxiliary vectors, we need to worry about maintaining endianness for the right context. Change-Id: I32c5ac4b679559886e1efeb4b5483b92dfc94af9 Reviewed-on: https://gem5-review.googlesource.com/12109 Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Maintainer: Anthony Gutierrez <anthony.gutierrez@amd.com>
89 lines
3.8 KiB
C++
89 lines
3.8 KiB
C++
/*
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* Copyright (c) 2016 Advanced Micro Devices, Inc.
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* All rights reserved.
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*
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* For use for simulation and test purposes only
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Brandon Potter
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*/
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#ifndef __AUX_VECTOR_HH__
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#define __AUX_VECTOR_HH__
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template<class IntType>
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class AuxVector
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{
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public:
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AuxVector() = default;
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AuxVector(IntType type, IntType val);
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IntType const& getAuxType() const { return _auxType; }
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IntType const& getAuxVal() const { return _auxVal; }
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IntType const& getHostAuxType() const { return _auxHostType; }
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IntType const& getHostAuxVal() const { return _auxHostVal; }
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void setAuxType(IntType type);
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void setAuxVal(IntType val);
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private:
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IntType _auxType = 0;
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IntType _auxVal = 0;
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IntType _auxHostType = 0;
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IntType _auxHostVal = 0;
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};
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enum AuxiliaryVectorType {
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M5_AT_NULL = 0, // End of vector.
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M5_AT_IGNORE = 1, // Ignored.
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M5_AT_EXECFD = 2, // File descriptor of program if interpreter used.
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M5_AT_PHDR = 3, // Address of program header tables in memory.
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M5_AT_PHENT = 4, // Size in bytes of one program header entry.
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M5_AT_PHNUM = 5, // Number of entries in program header table.
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M5_AT_PAGESZ = 6, // System page size.
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M5_AT_BASE = 7, // Base address of interpreter program in memory.
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M5_AT_FLAGS = 8, // Unused.
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M5_AT_ENTRY = 9, // Entry point of program after interpreter setup.
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M5_AT_NOTELF = 10, // Non-zero if format is different than ELF.
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M5_AT_UID = 11, // Address of real user ID of thread.
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M5_AT_EUID = 12, // Address of effective user ID of thread.
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M5_AT_GID = 13, // Address of real group ID of thread.
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M5_AT_EGID = 14, // Address of effective group ID of thread.
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M5_AT_PLATFORM = 15, // Platform string for the architecture.
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M5_AT_HWCAP = 16, // Bits which describe the hardware capabilities.
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M5_AT_CLKTCK = 17, // Frequency at which times() syscall increments.
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M5_AT_SECURE = 23, // Whether to enable "secure mode" in executable.
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M5_BASE_PLATFORM = 24, // Platform string (differs on PowerPC only).
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M5_AT_RANDOM = 25, // Pointer to 16 bytes of random data.
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M5_AT_HWCAP2 = 26, // Extension of AT_HWCAP.
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M5_AT_EXECFN = 31, // Filename of the program.
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M5_AT_VECTOR_SIZE = 44
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};
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#endif // __AUX_VECTOR_HH__
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