1/*
2 * Copyright (c) 2014 Advanced Micro Devices, Inc.
3 * Copyright (c) 2012 ARM Limited
4 * All rights reserved
5 *
6 * The license below extends only to copyright in the software and shall
7 * not be construed as granting a license to any other intellectual
8 * property including but not limited to intellectual property relating

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110 next_thread_stack_base(0),
111 M5_pid(system->allocatePID()),
112 useArchPT(params->useArchPT),
113 kvmInSE(params->kvmInSE),
114 pTable(useArchPT ?
115 static_cast<PageTableBase *>(new ArchPageTable(name(), M5_pid, system)) :
116 static_cast<PageTableBase *>(new FuncPageTable(name(), M5_pid)) ),
117 initVirtMem(system->getSystemPort(), this,
118 SETranslatingPortProxy::Always)
119{
120 string in = params->input;
121 string out = params->output;
122 string err = params->errout;
123
124 // initialize file descriptors to default: same as simulator
125 int stdin_fd, stdout_fd, stderr_fd;
126

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170 fdo->fd = stderr_fd;
171 fdo->filename = err;
172 fdo->flags = O_WRONLY;
173 fdo->mode = -1;
174 fdo->fileOffset = 0;
175
176
177 // mark remaining fds as free
178 for (int i = 3; i <= MAX_FD; ++i) {
179 fdo = &fd_map[i];
180 fdo->fd = -1;
181 }
182
183 mmap_start = mmap_end = 0;
184 nxm_start = nxm_end = 0;
185 // other parameters will be initialized when the program is loaded
186}

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195 .name(name() + ".num_syscalls")
196 .desc("Number of system calls")
197 ;
198}
199
200//
201// static helper functions
202//
203int
204Process::openInputFile(const string &filename)
205{
206 int fd = open(filename.c_str(), O_RDONLY);
207
208 if (fd == -1) {
209 perror(NULL);
210 cerr << "unable to open \"" << filename << "\" for reading\n";

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227 }
228
229 return fd;
230}
231
232ThreadContext *
233Process::findFreeContext()
234{
235 int size = contextIds.size();
236 ThreadContext *tc;
237 for (int i = 0; i < size; ++i) {
238 tc = system->getThreadContext(contextIds[i]);
239 if (tc->status() == ThreadContext::Halted) {
240 // inactive context, free to use
241 return tc;
242 }
243 }
244 return NULL;
245}
246
247void
248Process::initState()
249{
250 if (contextIds.empty())

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261
262DrainState
263Process::drain()
264{
265 find_file_offsets();
266 return DrainState::Drained;
267}
268
269// map simulator fd sim_fd to target fd tgt_fd
270void
271Process::dup_fd(int sim_fd, int tgt_fd)
272{
273 if (tgt_fd < 0 || tgt_fd > MAX_FD)
274 panic("Process::dup_fd tried to dup past MAX_FD (%d)", tgt_fd);
275
276 Process::FdMap *fdo = &fd_map[tgt_fd];
277 fdo->fd = sim_fd;
278}
279
280
281// generate new target fd for sim_fd
282int
283Process::alloc_fd(int sim_fd, const string& filename, int flags, int mode,
284 bool pipe)
285{
286 // in case open() returns an error, don't allocate a new fd
287 if (sim_fd == -1)
288 return -1;
289
290 // find first free target fd
291 for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
292 Process::FdMap *fdo = &fd_map[free_fd];
293 if (fdo->fd == -1 && fdo->driver == NULL) {
294 fdo->fd = sim_fd;
295 fdo->filename = filename;
296 fdo->mode = mode;
297 fdo->fileOffset = 0;
298 fdo->flags = flags;
299 fdo->isPipe = pipe;
300 fdo->readPipeSource = 0;
301 return free_fd;
302 }
303 }
304
305 panic("Process::alloc_fd: out of file descriptors!");
306}
307
308
309// free target fd (e.g., after close)
310void
311Process::free_fd(int tgt_fd)
312{
313 Process::FdMap *fdo = &fd_map[tgt_fd];
314 if (fdo->fd == -1)
315 warn("Process::free_fd: request to free unused fd %d", tgt_fd);
316
317 fdo->fd = -1;
318 fdo->filename = "NULL";
319 fdo->mode = 0;
320 fdo->fileOffset = 0;
321 fdo->flags = 0;
322 fdo->isPipe = false;
323 fdo->readPipeSource = 0;
324 fdo->driver = NULL;
325}
326
327
328// look up simulator fd for given target fd
329int
330Process::sim_fd(int tgt_fd)
331{
332 if (tgt_fd < 0 || tgt_fd > MAX_FD)
333 return -1;
334
335 return fd_map[tgt_fd].fd;
336}
337
338Process::FdMap *
339Process::sim_fd_obj(int tgt_fd)
340{
341 if (tgt_fd < 0 || tgt_fd > MAX_FD)
342 return NULL;
343
344 return &fd_map[tgt_fd];
345}
346
347void
348Process::allocateMem(Addr vaddr, int64_t size, bool clobber)
349{
350 int npages = divCeil(size, (int64_t)PageBytes);
351 Addr paddr = system->allocPhysPages(npages);
352 pTable->map(vaddr, paddr, size, clobber ? PageTableBase::Clobber : 0);
353}
354

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428 panic("Unable to seek to correct location in file: %s", err);
429 }
430
431 fdo_stdin->fd = stdin_fd;
432 fdo_stdout->fd = stdout_fd;
433 fdo_stderr->fd = stderr_fd;
434
435
436 for (int free_fd = 3; free_fd <= MAX_FD; ++free_fd) {
437 Process::FdMap *fdo = &fd_map[free_fd];
438 if (fdo->fd != -1) {
439 if (fdo->isPipe){
440 if (fdo->filename == "PIPE-WRITE")
441 continue;
442 else {
443 assert (fdo->filename == "PIPE-READ");
444 //create a new pipe

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471 }
472 }
473 }
474}
475
476void
477Process::find_file_offsets()
478{
479 for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) {
480 Process::FdMap *fdo = &fd_map[free_fd];
481 if (fdo->fd != -1) {
482 fdo->fileOffset = lseek(fdo->fd, 0, SEEK_CUR);
483 } else {
484 fdo->filename = "NULL";
485 fdo->fileOffset = 0;
486 }
487 }

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524 SERIALIZE_SCALAR(stack_size);
525 SERIALIZE_SCALAR(stack_min);
526 SERIALIZE_SCALAR(next_thread_stack_base);
527 SERIALIZE_SCALAR(mmap_start);
528 SERIALIZE_SCALAR(mmap_end);
529 SERIALIZE_SCALAR(nxm_start);
530 SERIALIZE_SCALAR(nxm_end);
531 pTable->serialize(cp);
532 for (int x = 0; x <= MAX_FD; x++) {
533 fd_map[x].serializeSection(cp, csprintf("FdMap%d", x));
534 }
535 SERIALIZE_SCALAR(M5_pid);
536
537}
538
539void
540Process::unserialize(CheckpointIn &cp)
541{
542 UNSERIALIZE_SCALAR(brk_point);
543 UNSERIALIZE_SCALAR(stack_base);
544 UNSERIALIZE_SCALAR(stack_size);
545 UNSERIALIZE_SCALAR(stack_min);
546 UNSERIALIZE_SCALAR(next_thread_stack_base);
547 UNSERIALIZE_SCALAR(mmap_start);
548 UNSERIALIZE_SCALAR(mmap_end);
549 UNSERIALIZE_SCALAR(nxm_start);
550 UNSERIALIZE_SCALAR(nxm_end);
551 pTable->unserialize(cp);
552 for (int x = 0; x <= MAX_FD; x++) {
553 fd_map[x].unserializeSection(cp, csprintf("FdMap%d", x));
554 }
555 fix_file_offsets();
556 UNSERIALIZE_OPT_SCALAR(M5_pid);
557 // The above returns a bool so that you could do something if you don't
558 // find the param in the checkpoint if you wanted to, like set a default
559 // but in this case we'll just stick with the instantianted value if not
560 // found.
561}
562
563
564bool
565Process::map(Addr vaddr, Addr paddr, int size, bool cacheable)
566{
567 pTable->map(vaddr, paddr, size,
568 cacheable ? 0 : PageTableBase::Uncacheable);

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