1/* 2 * Copyright (c) 2001-2005 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Nathan Binkert 29 * Steve Reinhardt 30 */ 31 32#ifndef __PROCESS_HH__ 33#define __PROCESS_HH__ 34 35// 36// The purpose of this code is to fake the loader & syscall mechanism 37// when there's no OS: thus there's no reason to use it in FULL_SYSTEM 38// mode when we do have an OS. 39// 40#include "config/full_system.hh" 41 42#if !FULL_SYSTEM 43 44#include <string> 45#include <vector> 46 47#include "base/statistics.hh" 48#include "sim/host.hh" 49#include "sim/sim_object.hh" 50 51class ThreadContext; 52class SyscallDesc; 53class PageTable; 54class TranslatingPort; 55class System; 56class GDBListener; 57namespace TheISA 58{ 59 class RemoteGDB; 60} 61 62class Process : public SimObject 63{ 64 public: 65 66 /// Pointer to object representing the system this process is 67 /// running on. 68 System *system; 69 70 // have we initialized a thread context from this process? If 71 // yes, subsequent contexts are assumed to be for dynamically 72 // created threads and are not initialized. 73 bool initialContextLoaded; 74 75 // thread contexts associated with this process 76 std::vector<ThreadContext *> threadContexts; 77 78 // remote gdb objects 79 std::vector<TheISA::RemoteGDB *> remoteGDB; 80 std::vector<GDBListener *> gdbListen; 81 bool breakpoint(); 82 83 // number of CPUs (esxec contexts, really) assigned to this process. 84 unsigned int numCpus() { return threadContexts.size(); } 85 86 // record of blocked context 87 struct WaitRec 88 { 89 Addr waitChan; 90 ThreadContext *waitingContext; 91 92 WaitRec(Addr chan, ThreadContext *ctx) 93 : waitChan(chan), waitingContext(ctx) 94 { } 95 }; 96 97 // list of all blocked contexts 98 std::list<WaitRec> waitList; 99 100 Addr brk_point; // top of the data segment 101 102 Addr stack_base; // stack segment base (highest address) 103 unsigned stack_size; // initial stack size 104 Addr stack_min; // lowest address accessed on the stack 105 106 // addr to use for next stack region (for multithreaded apps) 107 Addr next_thread_stack_base; 108 109 // Base of region for mmaps (when user doesn't specify an address). 110 Addr mmap_start; 111 Addr mmap_end; 112 113 // Base of region for nxm data 114 Addr nxm_start; 115 Addr nxm_end; 116 117 std::string prog_fname; // file name 118 119 Stats::Scalar<> num_syscalls; // number of syscalls executed 120 121 122 protected: 123 // constructor 124 Process(const std::string &nm, 125 System *_system, 126 int stdin_fd, // initial I/O descriptors 127 int stdout_fd, 128 int stderr_fd); 129 130 // post initialization startup 131 virtual void startup(); 132 133 protected: 134 /// Memory object for initialization (image loading) 135 TranslatingPort *initVirtMem; 136 137 public: 138 PageTable *pTable; 139
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144 private: 145 // file descriptor remapping support 146 static const int MAX_FD = 256; // max legal fd value 147 int fd_map[MAX_FD+1]; 148 149 public: 150 // static helper functions to generate file descriptors for constructor 151 static int openInputFile(const std::string &filename); 152 static int openOutputFile(const std::string &filename); 153 154 // override of virtual SimObject method: register statistics 155 virtual void regStats(); 156 157 // register a thread context for this process. 158 // returns tc's cpu number (index into threadContexts[]) 159 int registerThreadContext(ThreadContext *tc); 160 161 162 void replaceThreadContext(ThreadContext *tc, int tcIndex); 163 164 // map simulator fd sim_fd to target fd tgt_fd 165 void dup_fd(int sim_fd, int tgt_fd); 166 167 // generate new target fd for sim_fd 168 int alloc_fd(int sim_fd); 169 170 // free target fd (e.g., after close) 171 void free_fd(int tgt_fd); 172 173 // look up simulator fd for given target fd 174 int sim_fd(int tgt_fd); 175 176 virtual void syscall(int64_t callnum, ThreadContext *tc) = 0; 177 178 // check if the this addr is on the next available page and allocate it 179 // if it's not we'll panic 180 bool checkAndAllocNextPage(Addr vaddr); 181 182 void serialize(std::ostream &os); 183 void unserialize(Checkpoint *cp, const std::string §ion); 184}; 185 186// 187// "Live" process with system calls redirected to host system 188// 189class ObjectFile; 190class LiveProcess : public Process 191{ 192 protected: 193 ObjectFile *objFile; 194 std::vector<std::string> argv; 195 std::vector<std::string> envp; 196 std::string cwd; 197 198 LiveProcess(const std::string &nm, ObjectFile *objFile, 199 System *_system, int stdin_fd, int stdout_fd, int stderr_fd, 200 std::vector<std::string> &argv, 201 std::vector<std::string> &envp, 202 const std::string &cwd, 203 uint64_t _uid, uint64_t _euid, 204 uint64_t _gid, uint64_t _egid, 205 uint64_t _pid, uint64_t _ppid); 206 207 virtual void argsInit(int intSize, int pageSize); 208 209 // Id of the owner of the process 210 uint64_t __uid; 211 uint64_t __euid; 212 uint64_t __gid; 213 uint64_t __egid; 214 215 // pid of the process and it's parent 216 uint64_t __pid; 217 uint64_t __ppid; 218 219 public: 220 221 enum AuxiliaryVectorType { 222 M5_AT_NULL = 0, 223 M5_AT_IGNORE = 1, 224 M5_AT_EXECFD = 2, 225 M5_AT_PHDR = 3, 226 M5_AT_PHENT = 4, 227 M5_AT_PHNUM = 5, 228 M5_AT_PAGESZ = 6, 229 M5_AT_BASE = 7, 230 M5_AT_FLAGS = 8, 231 M5_AT_ENTRY = 9, 232 M5_AT_NOTELF = 10, 233 M5_AT_UID = 11, 234 M5_AT_EUID = 12, 235 M5_AT_GID = 13, 236 M5_AT_EGID = 14, 237 // The following may be specific to Linux 238 M5_AT_PLATFORM = 15, 239 M5_AT_HWCAP = 16, 240 M5_AT_CLKTCK = 17, 241 242 M5_AT_SECURE = 23, 243 244 M5_AT_VECTOR_SIZE = 44 245 }; 246 247 inline uint64_t uid() {return __uid;} 248 inline uint64_t euid() {return __euid;} 249 inline uint64_t gid() {return __gid;} 250 inline uint64_t egid() {return __egid;} 251 inline uint64_t pid() {return __pid;} 252 inline uint64_t ppid() {return __ppid;} 253 254 std::string 255 fullPath(const std::string &filename) 256 { 257 if (filename[0] == '/' || cwd.empty()) 258 return filename; 259 260 std::string full = cwd; 261 262 if (cwd[cwd.size() - 1] != '/') 263 full += '/'; 264 265 return full + filename; 266 } 267 268 virtual void syscall(int64_t callnum, ThreadContext *tc); 269 270 virtual SyscallDesc* getDesc(int callnum) = 0; 271 272 // this function is used to create the LiveProcess object, since 273 // we can't tell which subclass of LiveProcess to use until we 274 // open and look at the object file. 275 static LiveProcess *create(const std::string &nm, 276 System *_system, 277 int stdin_fd, int stdout_fd, int stderr_fd, 278 std::string executable, 279 std::vector<std::string> &argv, 280 std::vector<std::string> &envp, 281 const std::string &cwd, 282 uint64_t _uid, uint64_t _euid, 283 uint64_t _gid, uint64_t _egid, 284 uint64_t _pid, uint64_t _ppid); 285}; 286 287 288#endif // !FULL_SYSTEM 289 290#endif // __PROCESS_HH__
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