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Diffstat (limited to 'src/sim/process.hh')
| -rw-r--r-- | src/sim/process.hh | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/src/sim/process.hh b/src/sim/process.hh new file mode 100644 index 000000000..807bf330f --- /dev/null +++ b/src/sim/process.hh @@ -0,0 +1,192 @@ +/* + * Copyright (c) 2001-2005 The Regents of The University of Michigan + * 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 the copyright holders 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. + */ + +#ifndef __PROCESS_HH__ +#define __PROCESS_HH__ + +// +// The purpose of this code is to fake the loader & syscall mechanism +// when there's no OS: thus there's no reason to use it in FULL_SYSTEM +// mode when we do have an OS. +// +#include "config/full_system.hh" + +#if !FULL_SYSTEM + +#include <vector> + +#include "base/statistics.hh" +#include "sim/sim_object.hh" + +class CPUExecContext; +class ExecContext; +class SyscallDesc; +class PageTable; +class TranslatingPort; +class System; + +void +copyStringArray(std::vector<std::string> &strings, Addr array_ptr, + Addr data_ptr, TranslatingPort* memPort); + +class Process : public SimObject +{ + public: + + /// Pointer to object representing the system this process is + /// running on. + System *system; + + // have we initialized an execution context from this process? If + // yes, subsequent contexts are assumed to be for dynamically + // created threads and are not initialized. + bool initialContextLoaded; + + // execution contexts associated with this process + std::vector<ExecContext *> execContexts; + + // number of CPUs (esxec contexts, really) assigned to this process. + unsigned int numCpus() { return execContexts.size(); } + + // record of blocked context + struct WaitRec + { + Addr waitChan; + ExecContext *waitingContext; + + WaitRec(Addr chan, ExecContext *ctx) + : waitChan(chan), waitingContext(ctx) + { } + }; + + // list of all blocked contexts + std::list<WaitRec> waitList; + + Addr brk_point; // top of the data segment + + Addr stack_base; // stack segment base (highest address) + unsigned stack_size; // initial stack size + Addr stack_min; // lowest address accessed on the stack + + // addr to use for next stack region (for multithreaded apps) + Addr next_thread_stack_base; + + // Base of region for mmaps (when user doesn't specify an address). + Addr mmap_start; + Addr mmap_end; + + // Base of region for nxm data + Addr nxm_start; + Addr nxm_end; + + std::string prog_fname; // file name + + Stats::Scalar<> num_syscalls; // number of syscalls executed + + + protected: + // constructor + Process(const std::string &nm, + System *_system, + int stdin_fd, // initial I/O descriptors + int stdout_fd, + int stderr_fd); + + // post initialization startup + virtual void startup(); + + protected: + /// Memory object for initialization (image loading) + TranslatingPort *initVirtMem; + + public: + PageTable *pTable; + + private: + // file descriptor remapping support + static const int MAX_FD = 256; // max legal fd value + int fd_map[MAX_FD+1]; + + public: + // static helper functions to generate file descriptors for constructor + static int openInputFile(const std::string &filename); + static int openOutputFile(const std::string &filename); + + // override of virtual SimObject method: register statistics + virtual void regStats(); + + // register an execution context for this process. + // returns xc's cpu number (index into execContexts[]) + int registerExecContext(ExecContext *xc); + + + void replaceExecContext(ExecContext *xc, int xcIndex); + + // map simulator fd sim_fd to target fd tgt_fd + void dup_fd(int sim_fd, int tgt_fd); + + // generate new target fd for sim_fd + int alloc_fd(int sim_fd); + + // free target fd (e.g., after close) + void free_fd(int tgt_fd); + + // look up simulator fd for given target fd + int sim_fd(int tgt_fd); + + virtual void syscall(int64_t callnum, ExecContext *xc) = 0; +}; + +// +// "Live" process with system calls redirected to host system +// +class ObjectFile; +class LiveProcess : public Process +{ + protected: + ObjectFile *objFile; + std::vector<std::string> argv; + std::vector<std::string> envp; + + LiveProcess(const std::string &nm, ObjectFile *objFile, + System *_system, int stdin_fd, int stdout_fd, int stderr_fd, + std::vector<std::string> &argv, + std::vector<std::string> &envp); + + virtual void argsInit(int intSize, int pageSize); + + public: + virtual void syscall(int64_t callnum, ExecContext *xc); + + virtual SyscallDesc* getDesc(int callnum) = 0; +}; + + +#endif // !FULL_SYSTEM + +#endif // __PROCESS_HH__ |