2 * Copyright (c) 2001-2005 The Regents of The University of Michigan
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
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9 * redistributions in binary form must reproduce the above copyright
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11 * documentation and/or other materials provided with the distribution;
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14 * this software without specific prior written permission.
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
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26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 * Authors: Nathan Binkert
32 #ifndef __PROCESS_HH__
33 #define __PROCESS_HH__
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.
40 #include "config/full_system.hh"
47 #include "base/statistics.hh"
48 #include "sim/host.hh"
49 #include "sim/sim_object.hh"
54 class LiveProcessParams;
58 class TranslatingPort;
64 template<class IntType>
77 M5_auxv_t(IntType type, IntType val);
80 class Process : public SimObject
84 /// Pointer to object representing the system this process is
88 // have we initialized a thread context from this process? If
89 // yes, subsequent contexts are assumed to be for dynamically
90 // created threads and are not initialized.
91 bool initialContextLoaded;
93 bool checkpointRestored;
95 // thread contexts associated with this process
96 std::vector<int> contextIds;
99 std::vector<TheISA::RemoteGDB *> remoteGDB;
100 std::vector<GDBListener *> gdbListen;
103 // number of CPUs (esxec contexts, really) assigned to this process.
104 unsigned int numCpus() { return contextIds.size(); }
106 // record of blocked context
110 ThreadContext *waitingContext;
112 WaitRec(Addr chan, ThreadContext *ctx)
113 : waitChan(chan), waitingContext(ctx)
117 // list of all blocked contexts
118 std::list<WaitRec> waitList;
120 Addr brk_point; // top of the data segment
122 Addr stack_base; // stack segment base (highest address)
123 unsigned stack_size; // initial stack size
124 Addr stack_min; // lowest address accessed on the stack
126 // The maximum size allowed for the stack.
129 // addr to use for next stack region (for multithreaded apps)
130 Addr next_thread_stack_base;
132 // Base of region for mmaps (when user doesn't specify an address).
136 // Base of region for nxm data
140 std::string prog_fname; // file name
142 Stats::Scalar<> num_syscalls; // number of syscalls executed
147 Process(ProcessParams * params);
149 // post initialization startup
150 virtual void startup();
153 /// Memory object for initialization (image loading)
154 TranslatingPort *initVirtMem;
159 //This id is assigned by m5 and is used to keep process' tlb entries
167 std::string filename;
187 void serialize(std::ostream &os);
188 void unserialize(Checkpoint *cp, const std::string §ion);
193 // file descriptor remapping support
194 static const int MAX_FD = 256; // max legal fd value
195 FdMap fd_map[MAX_FD+1];
199 // static helper functions to generate file descriptors for constructor
200 static int openInputFile(const std::string &filename);
201 static int openOutputFile(const std::string &filename);
203 // override of virtual SimObject method: register statistics
204 virtual void regStats();
206 // After getting registered with system object, tell process which
207 // system-wide context id it is assigned.
208 void assignThreadContext(int context_id)
210 contextIds.push_back(context_id);
213 // Find a free context to use
214 ThreadContext * findFreeContext();
216 // map simulator fd sim_fd to target fd tgt_fd
217 void dup_fd(int sim_fd, int tgt_fd);
219 // generate new target fd for sim_fd
220 int alloc_fd(int sim_fd, std::string filename, int flags, int mode, bool pipe);
222 // free target fd (e.g., after close)
223 void free_fd(int tgt_fd);
225 // look up simulator fd for given target fd
226 int sim_fd(int tgt_fd);
228 // look up simulator fd_map object for a given target fd
229 FdMap * sim_fd_obj(int tgt_fd);
231 // fix all offsets for currently open files and save them
232 void fix_file_offsets();
234 // find all offsets for currently open files and save them
235 void find_file_offsets();
237 // set the source of this read pipe for a checkpoint resume
238 void setReadPipeSource(int read_pipe_fd, int source_fd);
240 virtual void syscall(int64_t callnum, ThreadContext *tc) = 0;
242 // check if the this addr is on the next available page and allocate it
243 // if it's not we'll panic
244 bool checkAndAllocNextPage(Addr vaddr);
246 void serialize(std::ostream &os);
247 void unserialize(Checkpoint *cp, const std::string §ion);
251 // "Live" process with system calls redirected to host system
254 class LiveProcess : public Process
258 std::vector<std::string> argv;
259 std::vector<std::string> envp;
262 LiveProcess(LiveProcessParams * params, ObjectFile *objFile);
264 virtual void argsInit(int intSize, int pageSize);
266 // Id of the owner of the process
272 // pid of the process and it's parent
278 enum AuxiliaryVectorType {
294 // The following may be specific to Linux
301 M5_AT_VECTOR_SIZE = 44
304 inline uint64_t uid() {return __uid;}
305 inline uint64_t euid() {return __euid;}
306 inline uint64_t gid() {return __gid;}
307 inline uint64_t egid() {return __egid;}
308 inline uint64_t pid() {return __pid;}
309 inline uint64_t ppid() {return __ppid;}
312 fullPath(const std::string &filename)
314 if (filename[0] == '/' || cwd.empty())
317 std::string full = cwd;
319 if (cwd[cwd.size() - 1] != '/')
322 return full + filename;
325 std::string getcwd() const { return cwd; }
327 virtual void syscall(int64_t callnum, ThreadContext *tc);
329 virtual SyscallDesc* getDesc(int callnum) = 0;
331 // this function is used to create the LiveProcess object, since
332 // we can't tell which subclass of LiveProcess to use until we
333 // open and look at the object file.
334 static LiveProcess *create(LiveProcessParams * params);
338 #endif // !FULL_SYSTEM
340 #endif // __PROCESS_HH__