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
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
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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
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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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 "arch/registers.hh"
48 #include "base/statistics.hh"
49 #include "base/types.hh"
50 #include "config/the_isa.hh"
51 #include "sim/sim_object.hh"
52 #include "sim/syscallreturn.hh"
56 class LiveProcessParams;
60 class TranslatingPort;
62 template<class IntType>
71 AuxVector(IntType type, IntType val);
74 class Process : public SimObject
78 /// Pointer to object representing the system this process is
82 // thread contexts associated with this process
83 std::vector<int> contextIds;
85 // number of CPUs (esxec contexts, really) assigned to this process.
86 unsigned int numCpus() { return contextIds.size(); }
88 // record of blocked context
92 ThreadContext *waitingContext;
94 WaitRec(Addr chan, ThreadContext *ctx)
95 : waitChan(chan), waitingContext(ctx)
99 // list of all blocked contexts
100 std::list<WaitRec> waitList;
102 Addr brk_point; // top of the data segment
104 Addr stack_base; // stack segment base (highest address)
105 unsigned stack_size; // initial stack size
106 Addr stack_min; // lowest address accessed on the stack
108 // The maximum size allowed for the stack.
111 // addr to use for next stack region (for multithreaded apps)
112 Addr next_thread_stack_base;
114 // Base of region for mmaps (when user doesn't specify an address).
118 // Base of region for nxm data
122 std::string prog_fname; // file name
124 Stats::Scalar num_syscalls; // number of syscalls executed
129 Process(ProcessParams * params);
131 virtual void initState();
134 /// Memory object for initialization (image loading)
135 TranslatingPort *initVirtMem;
140 //This id is assigned by m5 and is used to keep process' tlb entries
148 std::string filename;
168 void serialize(std::ostream &os);
169 void unserialize(Checkpoint *cp, const std::string §ion);
174 // file descriptor remapping support
175 static const int MAX_FD = 256; // max legal fd value
176 FdMap fd_map[MAX_FD+1];
180 // static helper functions to generate file descriptors for constructor
181 static int openInputFile(const std::string &filename);
182 static int openOutputFile(const std::string &filename);
184 // override of virtual SimObject method: register statistics
185 virtual void regStats();
187 // After getting registered with system object, tell process which
188 // system-wide context id it is assigned.
189 void assignThreadContext(int context_id)
191 contextIds.push_back(context_id);
194 // Find a free context to use
195 ThreadContext * findFreeContext();
197 // map simulator fd sim_fd to target fd tgt_fd
198 void dup_fd(int sim_fd, int tgt_fd);
200 // generate new target fd for sim_fd
201 int alloc_fd(int sim_fd, std::string filename, int flags, int mode, bool pipe);
203 // free target fd (e.g., after close)
204 void free_fd(int tgt_fd);
206 // look up simulator fd for given target fd
207 int sim_fd(int tgt_fd);
209 // look up simulator fd_map object for a given target fd
210 FdMap * sim_fd_obj(int tgt_fd);
212 // fix all offsets for currently open files and save them
213 void fix_file_offsets();
215 // find all offsets for currently open files and save them
216 void find_file_offsets();
218 // set the source of this read pipe for a checkpoint resume
219 void setReadPipeSource(int read_pipe_fd, int source_fd);
221 virtual void syscall(int64_t callnum, ThreadContext *tc) = 0;
223 // check if the this addr is on the next available page and allocate it
224 // if it's not we'll panic
225 bool checkAndAllocNextPage(Addr vaddr);
227 void serialize(std::ostream &os);
228 void unserialize(Checkpoint *cp, const std::string §ion);
232 // "Live" process with system calls redirected to host system
235 class LiveProcess : public Process
239 std::vector<std::string> argv;
240 std::vector<std::string> envp;
243 LiveProcess(LiveProcessParams * params, ObjectFile *objFile);
245 // Id of the owner of the process
251 // pid of the process and it's parent
257 enum AuxiliaryVectorType {
273 // The following may be specific to Linux
279 M5_BASE_PLATFORM = 24,
284 M5_AT_VECTOR_SIZE = 44
287 inline uint64_t uid() {return __uid;}
288 inline uint64_t euid() {return __euid;}
289 inline uint64_t gid() {return __gid;}
290 inline uint64_t egid() {return __egid;}
291 inline uint64_t pid() {return __pid;}
292 inline uint64_t ppid() {return __ppid;}
295 fullPath(const std::string &filename)
297 if (filename[0] == '/' || cwd.empty())
300 std::string full = cwd;
302 if (cwd[cwd.size() - 1] != '/')
305 return full + filename;
308 std::string getcwd() const { return cwd; }
310 virtual void syscall(int64_t callnum, ThreadContext *tc);
312 virtual TheISA::IntReg getSyscallArg(ThreadContext *tc, int &i) = 0;
313 virtual TheISA::IntReg getSyscallArg(ThreadContext *tc, int &i, int width);
314 virtual void setSyscallArg(ThreadContext *tc,
315 int i, TheISA::IntReg val) = 0;
316 virtual void setSyscallReturn(ThreadContext *tc,
317 SyscallReturn return_value) = 0;
319 virtual SyscallDesc* getDesc(int callnum) = 0;
321 // this function is used to create the LiveProcess object, since
322 // we can't tell which subclass of LiveProcess to use until we
323 // open and look at the object file.
324 static LiveProcess *create(LiveProcessParams * params);
328 #endif // !FULL_SYSTEM
330 #endif // __PROCESS_HH__