process.hh revision 180
112841Sgabeblack@google.com/* 212841Sgabeblack@google.com * Copyright (c) 2003 The Regents of The University of Michigan 312841Sgabeblack@google.com * All rights reserved. 412841Sgabeblack@google.com * 512841Sgabeblack@google.com * Redistribution and use in source and binary forms, with or without 612841Sgabeblack@google.com * modification, are permitted provided that the following conditions are 712841Sgabeblack@google.com * met: redistributions of source code must retain the above copyright 812841Sgabeblack@google.com * notice, this list of conditions and the following disclaimer; 912841Sgabeblack@google.com * redistributions in binary form must reproduce the above copyright 1012841Sgabeblack@google.com * notice, this list of conditions and the following disclaimer in the 1112841Sgabeblack@google.com * documentation and/or other materials provided with the distribution; 1212841Sgabeblack@google.com * neither the name of the copyright holders nor the names of its 1312841Sgabeblack@google.com * contributors may be used to endorse or promote products derived from 1412841Sgabeblack@google.com * this software without specific prior written permission. 1512841Sgabeblack@google.com * 1612841Sgabeblack@google.com * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 1712841Sgabeblack@google.com * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 1812841Sgabeblack@google.com * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 1912841Sgabeblack@google.com * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 2012841Sgabeblack@google.com * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 2112841Sgabeblack@google.com * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 2212841Sgabeblack@google.com * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2312841Sgabeblack@google.com * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2412841Sgabeblack@google.com * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2512841Sgabeblack@google.com * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 2612841Sgabeblack@google.com * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2712841Sgabeblack@google.com */ 2812841Sgabeblack@google.com 2912841Sgabeblack@google.com#ifndef __PROG_HH__ 3012841Sgabeblack@google.com#define __PROG_HH__ 3112841Sgabeblack@google.com 3212841Sgabeblack@google.com// 3312841Sgabeblack@google.com// The purpose of this code is to fake the loader & syscall mechanism 3412841Sgabeblack@google.com// when there's no OS: thus there's no reason to use it in FULL_SYSTEM 3512841Sgabeblack@google.com// mode when we do have an OS. 3612841Sgabeblack@google.com// 3712841Sgabeblack@google.com#ifndef FULL_SYSTEM 3812841Sgabeblack@google.com 3912841Sgabeblack@google.com#include <vector> 4012841Sgabeblack@google.com 4112841Sgabeblack@google.com#include "targetarch/isa_traits.hh" 4212841Sgabeblack@google.com#include "sim/sim_object.hh" 4312841Sgabeblack@google.com#include "sim/sim_stats.hh" 4412841Sgabeblack@google.com#include "base/statistics.hh" 4512841Sgabeblack@google.com 4612841Sgabeblack@google.comclass ExecContext; 4712841Sgabeblack@google.comclass FunctionalMemory; 4812841Sgabeblack@google.comclass Process : public SimObject 4912841Sgabeblack@google.com{ 5012841Sgabeblack@google.com public: 5112841Sgabeblack@google.com 5212841Sgabeblack@google.com // have we initialized an execution context from this process? If 5312841Sgabeblack@google.com // yes, subsequent contexts are assumed to be for dynamically 5412841Sgabeblack@google.com // created threads and are not initialized. 5512841Sgabeblack@google.com bool initialContextLoaded; 5612841Sgabeblack@google.com 5712841Sgabeblack@google.com // execution contexts associated with this process 5812841Sgabeblack@google.com std::vector<ExecContext *> execContexts; 5912841Sgabeblack@google.com 6012841Sgabeblack@google.com // number of CPUs (esxec contexts, really) assigned to this process. 6112841Sgabeblack@google.com unsigned int numCpus() { return execContexts.size(); } 6212841Sgabeblack@google.com 6312841Sgabeblack@google.com // record of blocked context 6412841Sgabeblack@google.com struct WaitRec 6512841Sgabeblack@google.com { 6612841Sgabeblack@google.com Addr waitChan; 6712841Sgabeblack@google.com ExecContext *waitingContext; 6812841Sgabeblack@google.com 6912841Sgabeblack@google.com WaitRec(Addr chan, ExecContext *ctx) 7012841Sgabeblack@google.com : waitChan(chan), waitingContext(ctx) 7112841Sgabeblack@google.com { 7212841Sgabeblack@google.com } 7312841Sgabeblack@google.com }; 7412841Sgabeblack@google.com 7512841Sgabeblack@google.com // list of all blocked contexts 7612841Sgabeblack@google.com std::list<WaitRec> waitList; 7712841Sgabeblack@google.com 7812841Sgabeblack@google.com RegFile *init_regs; // initial register contents 7912841Sgabeblack@google.com 8012841Sgabeblack@google.com Addr text_base; // text (code) segment base 8112841Sgabeblack@google.com unsigned text_size; // text (code) size in bytes 8212841Sgabeblack@google.com 8312841Sgabeblack@google.com Addr data_base; // initialized data segment base 8412841Sgabeblack@google.com unsigned data_size; // initialized data + bss size in bytes 8512841Sgabeblack@google.com 8612841Sgabeblack@google.com Addr brk_point; // top of the data segment 8712841Sgabeblack@google.com 8812841Sgabeblack@google.com Addr stack_base; // stack segment base (highest address) 8912841Sgabeblack@google.com unsigned stack_size; // initial stack size 9012841Sgabeblack@google.com Addr stack_min; // lowest address accessed on the stack 9112841Sgabeblack@google.com 9212841Sgabeblack@google.com 9312841Sgabeblack@google.com // addr to use for next stack region (for multithreaded apps) 9412841Sgabeblack@google.com Addr next_thread_stack_base; 9512841Sgabeblack@google.com 9612841Sgabeblack@google.com std::string prog_fname; // file name 9712841Sgabeblack@google.com Addr prog_entry; // entry point (initial PC) 9812841Sgabeblack@google.com 99 Statistics::Scalar<> num_syscalls; // number of syscalls executed 100 101 102 protected: 103 // constructor 104 Process(const std::string &name, 105 int stdin_fd, // initial I/O descriptors 106 int stdout_fd, 107 int stderr_fd); 108 109 110 protected: 111 FunctionalMemory *memory; 112 113 private: 114 // file descriptor remapping support 115 static const int MAX_FD = 100; // max legal fd value 116 int fd_map[MAX_FD+1]; 117 118 public: 119 // static helper functions to generate file descriptors for constructor 120 static int openInputFile(const std::string &filename); 121 static int openOutputFile(const std::string &filename); 122 123 // override of virtual SimObject method: register statistics 124 virtual void regStats(); 125 126 // register an execution context for this process. 127 // returns xc's cpu number (index into execContexts[]) 128 int registerExecContext(ExecContext *xc); 129 130 131 void replaceExecContext(int xcIndex, ExecContext *xc); 132 133 // map simulator fd sim_fd to target fd tgt_fd 134 void dup_fd(int sim_fd, int tgt_fd); 135 136 // generate new target fd for sim_fd 137 int open_fd(int sim_fd); 138 139 // look up simulator fd for given target fd 140 int sim_fd(int tgt_fd); 141 142 // is this a valid instruction fetch address? 143 bool validInstAddr(Addr addr) 144 { 145 return (text_base <= addr && 146 addr < text_base + text_size && 147 !(addr & (sizeof(MachInst)-1))); 148 } 149 150 // is this a valid address? (used to filter data fetches) 151 // note that we just assume stack size <= 16MB 152 // this may be alpha-specific 153 bool validDataAddr(Addr addr) 154 { 155 return ((data_base <= addr && addr < brk_point) || 156 ((stack_base - 16*1024*1024) <= addr && addr < stack_base) || 157 (text_base <= addr && addr < (text_base + text_size))); 158 } 159 160 virtual void syscall(ExecContext *xc) = 0; 161 162 virtual FunctionalMemory *getMemory() { return memory; } 163}; 164 165// 166// "Live" process with system calls redirected to host system 167// 168class MainMemory; 169class LiveProcess : public Process 170{ 171 public: 172 LiveProcess(const std::string &name, 173 int stdin_fd, int stdout_fd, int stderr_fd, 174 std::vector<std::string> &argv, 175 std::vector<std::string> &envp); 176 177 virtual void syscall(ExecContext *xc); 178}; 179 180#endif // !FULL_SYSTEM 181 182#endif // __PROG_HH__ 183