2 * Copyright (c) 2003 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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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.
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,
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26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 #include "base/intmath.hh"
36 #include "base/loader/object_file.hh"
37 #include "base/statistics.hh"
38 #include "cpu/exec_context.hh"
39 #include "cpu/full_cpu/smt.hh"
40 #include "cpu/full_cpu/thread.hh"
42 #include "mem/functional_mem/main_memory.hh"
43 #include "sim/builder.hh"
44 #include "sim/fake_syscall.hh"
45 #include "sim/process.hh"
46 #include "sim/sim_stats.hh"
49 #include "arch/alpha/alpha_tru64_process.hh"
50 #include "arch/alpha/alpha_linux_process.hh"
56 // The purpose of this code is to fake the loader & syscall mechanism
57 // when there's no OS: thus there's no resone to use it in FULL_SYSTEM
58 // mode when we do have an OS
61 #error "process.cc not compatible with FULL_SYSTEM"
64 // current number of allocated processes
65 int num_processes
= 0;
67 Process::Process(const string
&name
,
68 int stdin_fd
, // initial I/O descriptors
73 // allocate memory space
74 memory
= new MainMemory(name
+ ".MainMem");
76 // allocate initial register file
77 init_regs
= new RegFile
;
79 // initialize first 3 fds (stdin, stdout, stderr)
80 fd_map
[STDIN_FILENO
] = stdin_fd
;
81 fd_map
[STDOUT_FILENO
] = stdout_fd
;
82 fd_map
[STDERR_FILENO
] = stderr_fd
;
84 // mark remaining fds as free
85 for (int i
= 3; i
<= MAX_FD
; ++i
) {
91 // other parameters will be initialized when the program is loaded
97 using namespace Statistics
;
100 .name(name() + ".PROG:num_syscalls")
101 .desc("Number of system calls")
106 // static helper functions
109 Process::openInputFile(const string
&filename
)
111 int fd
= open(filename
.c_str(), O_RDONLY
);
115 cerr
<< "unable to open \"" << filename
<< "\" for reading\n";
116 fatal("can't open input file");
124 Process::openOutputFile(const string
&filename
)
126 int fd
= open(filename
.c_str(), O_WRONLY
| O_CREAT
| O_TRUNC
, 0774);
130 cerr
<< "unable to open \"" << filename
<< "\" for writing\n";
131 fatal("can't open output file");
139 Process::registerExecContext(ExecContext
*xc
)
142 int myIndex
= execContexts
.size();
143 execContexts
.push_back(xc
);
146 // first exec context for this process... initialize & enable
148 // copy process's initial regs struct
149 xc
->regs
= *init_regs
;
151 // mark this context as active.
152 // activate with zero delay so that we start ticking right
157 // return CPU number to caller and increment available CPU count
163 Process::replaceExecContext(int xcIndex
, ExecContext
*xc
)
165 if (xcIndex
>= execContexts
.size()) {
166 panic("replaceExecContext: bad xcIndex, %d >= %d\n",
167 xcIndex
, execContexts
.size());
170 execContexts
[xcIndex
] = xc
;
173 // map simulator fd sim_fd to target fd tgt_fd
175 Process::dup_fd(int sim_fd
, int tgt_fd
)
177 if (tgt_fd
< 0 || tgt_fd
> MAX_FD
)
178 panic("Process::dup_fd tried to dup past MAX_FD (%d)", tgt_fd
);
180 fd_map
[tgt_fd
] = sim_fd
;
184 // generate new target fd for sim_fd
186 Process::open_fd(int sim_fd
)
190 // in case open() returns an error, don't allocate a new fd
194 // find first free target fd
195 for (free_fd
= 0; fd_map
[free_fd
] >= 0; ++free_fd
) {
196 if (free_fd
== MAX_FD
)
197 panic("Process::open_fd: out of file descriptors!");
200 fd_map
[free_fd
] = sim_fd
;
206 // look up simulator fd for given target fd
208 Process::sim_fd(int tgt_fd
)
213 return fd_map
[tgt_fd
];
219 // need to declare these here since there is no concrete Process type
220 // that can be constructed (i.e., no REGISTER_SIM_OBJECT() macro call,
221 // which is where these get declared for concrete types).
223 DEFINE_SIM_OBJECT_CLASS_NAME("Process object", Process
)
226 ////////////////////////////////////////////////////////////////////////
228 // LiveProcess member definitions
230 ////////////////////////////////////////////////////////////////////////
234 copyStringArray(vector
<string
> &strings
, Addr array_ptr
, Addr data_ptr
,
235 FunctionalMemory
*memory
)
237 for (int i
= 0; i
< strings
.size(); ++i
) {
238 memory
->access(Write
, array_ptr
, &data_ptr
, sizeof(Addr
));
239 memory
->writeString(data_ptr
, strings
[i
].c_str());
240 array_ptr
+= sizeof(Addr
);
241 data_ptr
+= strings
[i
].size() + 1;
243 // add NULL terminator
245 memory
->access(Write
, array_ptr
, &data_ptr
, sizeof(Addr
));
248 LiveProcess::LiveProcess(const string
&name
, ObjectFile
*objFile
,
249 int stdin_fd
, int stdout_fd
, int stderr_fd
,
250 vector
<string
> &argv
, vector
<string
> &envp
)
251 : Process(name
, stdin_fd
, stdout_fd
, stderr_fd
)
253 prog_fname
= argv
[0];
255 prog_entry
= objFile
->entryPoint();
256 text_base
= objFile
->textBase();
257 text_size
= objFile
->textSize();
258 data_base
= objFile
->dataBase();
259 data_size
= objFile
->dataSize() + objFile
->bssSize();
260 brk_point
= RoundUp
<uint64_t>(data_base
+ data_size
, VMPageSize
);
262 // load object file into target memory
263 objFile
->loadSections(memory
);
265 // Set up stack. On Alpha, stack goes below text section. This
266 // code should get moved to some architecture-specific spot.
267 stack_base
= text_base
- (409600+4096);
269 // Set up region for mmaps. Tru64 seems to start just above 0 and
270 // grow up from there.
273 // Set pointer for next thread stack. Reserve 8M for main stack.
274 next_thread_stack_base
= stack_base
- (8 * 1024 * 1024);
276 // Calculate how much space we need for arg & env arrays.
277 int argv_array_size
= sizeof(Addr
) * (argv
.size() + 1);
278 int envp_array_size
= sizeof(Addr
) * (envp
.size() + 1);
279 int arg_data_size
= 0;
280 for (int i
= 0; i
< argv
.size(); ++i
) {
281 arg_data_size
+= argv
[i
].size() + 1;
283 int env_data_size
= 0;
284 for (int i
= 0; i
< envp
.size(); ++i
) {
285 env_data_size
+= envp
[i
].size() + 1;
289 argv_array_size
+ envp_array_size
+ arg_data_size
+ env_data_size
;
290 // for SimpleScalar compatibility
291 if (space_needed
< 16384)
292 space_needed
= 16384;
294 // set bottom of stack
295 stack_min
= stack_base
- space_needed
;
298 stack_size
= stack_base
- stack_min
;
300 // map out initial stack contents
301 Addr argv_array_base
= stack_min
+ sizeof(uint64_t); // room for argc
302 Addr envp_array_base
= argv_array_base
+ argv_array_size
;
303 Addr arg_data_base
= envp_array_base
+ envp_array_size
;
304 Addr env_data_base
= arg_data_base
+ arg_data_size
;
306 // write contents to stack
307 uint64_t argc
= argv
.size();
308 memory
->access(Write
, stack_min
, &argc
, sizeof(uint64_t));
310 copyStringArray(argv
, argv_array_base
, arg_data_base
, memory
);
311 copyStringArray(envp
, envp_array_base
, env_data_base
, memory
);
313 init_regs
->intRegFile
[ArgumentReg0
] = argc
;
314 init_regs
->intRegFile
[ArgumentReg1
] = argv_array_base
;
315 init_regs
->intRegFile
[StackPointerReg
] = stack_min
;
316 init_regs
->intRegFile
[GlobalPointerReg
] = objFile
->globalPointer();
317 init_regs
->pc
= prog_entry
;
318 init_regs
->npc
= prog_entry
+ sizeof(MachInst
);
323 LiveProcess::create(const string
&name
,
324 int stdin_fd
, int stdout_fd
, int stderr_fd
,
325 vector
<string
> &argv
, vector
<string
> &envp
)
327 LiveProcess
*process
= NULL
;
328 ObjectFile
*objFile
= createObjectFile(argv
[0]);
329 if (objFile
== NULL
) {
330 fatal("Can't load object file %s", argv
[0]);
333 // check object type & set up syscall emulation pointer
334 if (objFile
->getArch() == ObjectFile::Alpha
) {
335 switch (objFile
->getOpSys()) {
336 case ObjectFile::Tru64
:
337 process
= new AlphaTru64Process(name
, objFile
,
338 stdin_fd
, stdout_fd
, stderr_fd
,
342 case ObjectFile::Linux
:
343 process
= new AlphaLinuxProcess(name
, objFile
,
344 stdin_fd
, stdout_fd
, stderr_fd
,
349 fatal("Unknown/unsupported operating system.");
352 fatal("Unknown object file architecture.");
358 fatal("Unknown error creating process object.");
364 BEGIN_DECLARE_SIM_OBJECT_PARAMS(LiveProcess
)
366 VectorParam
<string
> cmd
;
368 Param
<string
> output
;
369 VectorParam
<string
> env
;
371 END_DECLARE_SIM_OBJECT_PARAMS(LiveProcess
)
374 BEGIN_INIT_SIM_OBJECT_PARAMS(LiveProcess
)
376 INIT_PARAM(cmd
, "command line (executable plus arguments)"),
377 INIT_PARAM(input
, "filename for stdin (dflt: use sim stdin)"),
378 INIT_PARAM(output
, "filename for stdout/stderr (dflt: use sim stdout)"),
379 INIT_PARAM(env
, "environment settings")
381 END_INIT_SIM_OBJECT_PARAMS(LiveProcess
)
384 CREATE_SIM_OBJECT(LiveProcess
)
386 // initialize file descriptors to default: same as simulator
387 int stdin_fd
= input
.isValid() ? Process::openInputFile(input
) : 0;
388 int stdout_fd
= output
.isValid() ? Process::openOutputFile(output
) : 1;
389 int stderr_fd
= output
.isValid() ? stdout_fd
: 2;
391 // dummy for default env
392 vector
<string
> null_vec
;
394 // We do this with "temp" because of the bogus compiler warning
395 // you get with g++ 2.95 -O if you just "return new LiveProcess(..."
396 LiveProcess
*temp
= LiveProcess::create(getInstanceName(),
397 stdin_fd
, stdout_fd
, stderr_fd
,
399 env
.isValid() ? env
: null_vec
);
405 REGISTER_SIM_OBJECT("LiveProcess", LiveProcess
)