f6cd7a4bb7
The mmapGrowsDown() method was a static method on the OperatingSystem class (and derived classes), which worked OK for the templated syscall emulation methods, but made it hard to access elsewhere. This patch moves the method to be a virtual function on the LiveProcess method, where it can be overridden for specific platforms (for now, Alpha). This patch also changes the value of mmapGrowsDown() from being false by default and true only on X86Linux32 to being true by default and false only on Alpha, which seems closer to reality (though in reality most people use ASLR and this doesn't really matter anymore). In the process, also got rid of the unused mmap_start field on LiveProcess and OperatingSystem mmapGrowsUp variable.
122 lines
4.6 KiB
C++
122 lines
4.6 KiB
C++
/*
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* Copyright (c) 2004-2005 The Regents of The University of Michigan
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* All rights reserved.
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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
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Gabe Black
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*/
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#ifndef __KERN_OPERATINGSYSTEM_HH__
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#define __KERN_OPERATINGSYSTEM_HH__
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#include "base/types.hh"
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#include <string>
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class LiveProcess;
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class ThreadContext;
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/// This struct is used to build target-OS-dependent tables that
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/// map the target's flags to the host's flags.
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struct SyscallFlagTransTable {
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int tgtFlag; //!< Target system flag value.
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int hostFlag; //!< Corresponding host system flag value.
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};
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///
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/// This class encapsulates the types, structures, constants,
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/// functions, and syscall-number mappings specific to an operating system
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/// syscall interface.
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///
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class OperatingSystem {
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public:
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/// Stat buffer. Note that we can't call it 'stat' since that
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/// gets #defined to something else on some systems. This type
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/// can be specialized by architecture specific "Linux" classes
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typedef void tgt_stat;
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// same for stat64
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typedef void tgt_stat64;
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/// Length of strings in struct utsname (plus 1 for null char).
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static const int _SYS_NMLN = 65;
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/// Interface struct for uname().
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typedef struct {
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char sysname[_SYS_NMLN]; //!< System name.
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char nodename[_SYS_NMLN]; //!< Node name.
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char release[_SYS_NMLN]; //!< OS release.
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char version[_SYS_NMLN]; //!< OS version.
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char machine[_SYS_NMLN]; //!< Machine type.
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} utsname;
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/// Limit struct for getrlimit/setrlimit.
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typedef struct {
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uint64_t rlim_cur; //!< soft limit
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uint64_t rlim_max; //!< hard limit
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} rlimit;
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/// For gettimeofday().
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typedef struct {
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int64_t tv_sec; //!< seconds
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int64_t tv_usec; //!< microseconds
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} timeval;
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// For writev/readv
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typedef struct {
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uint64_t iov_base; // void *
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uint64_t iov_len;
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} tgt_iovec;
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/// For getrusage().
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typedef struct {
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timeval ru_utime; //!< user time used
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timeval ru_stime; //!< system time used
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int64_t ru_maxrss; //!< max rss
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int64_t ru_ixrss; //!< integral shared memory size
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int64_t ru_idrss; //!< integral unshared data "
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int64_t ru_isrss; //!< integral unshared stack "
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int64_t ru_minflt; //!< page reclaims - total vmfaults
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int64_t ru_majflt; //!< page faults
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int64_t ru_nswap; //!< swaps
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int64_t ru_inblock; //!< block input operations
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int64_t ru_oublock; //!< block output operations
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int64_t ru_msgsnd; //!< messages sent
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int64_t ru_msgrcv; //!< messages received
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int64_t ru_nsignals; //!< signals received
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int64_t ru_nvcsw; //!< voluntary context switches
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int64_t ru_nivcsw; //!< involuntary "
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} rusage;
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static int openSpecialFile(std::string path, LiveProcess *process, ThreadContext *tc);
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}; // class OperatingSystem
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#endif // __OPERATINGSYSTEM_HH__
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