1/*
2 * Copyright (c) 2003-2005 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: Steve Reinhardt
29 * Kevin Lim
30 */
31
32#ifndef __SIM_SYSCALL_EMUL_HH__
33#define __SIM_SYSCALL_EMUL_HH__
34
35#define NO_STAT64 (defined(__APPLE__) || defined(__OpenBSD__) || \
36 defined(__FreeBSD__) || defined(__CYGWIN__))
37
38///
39/// @file syscall_emul.hh
40///
41/// This file defines objects used to emulate syscalls from the target
42/// application on the host machine.
43
44#include <errno.h>
45#include <string>
46#ifdef __CYGWIN32__
47#include <sys/fcntl.h> // for O_BINARY
48#endif
49#include <sys/stat.h>
50#include <fcntl.h>
51#include <sys/uio.h>
52
53#include "sim/host.hh" // for Addr
54#include "base/chunk_generator.hh"
55#include "base/intmath.hh" // for RoundUp
56#include "base/misc.hh"
57#include "base/trace.hh"
58#include "cpu/base.hh"
59#include "cpu/thread_context.hh"
60#include "mem/translating_port.hh"
61#include "mem/page_table.hh"
62#include "sim/process.hh"
63
64///
65/// System call descriptor.
66///
67class SyscallDesc {
68
69 public:
70
71 /// Typedef for target syscall handler functions.
72 typedef SyscallReturn (*FuncPtr)(SyscallDesc *, int num,
73 LiveProcess *, ThreadContext *);
74
75 const char *name; //!< Syscall name (e.g., "open").
76 FuncPtr funcPtr; //!< Pointer to emulation function.
77 int flags; //!< Flags (see Flags enum).
78
79 /// Flag values for controlling syscall behavior.
80 enum Flags {
81 /// Don't set return regs according to funcPtr return value.
82 /// Used for syscalls with non-standard return conventions
83 /// that explicitly set the ThreadContext regs (e.g.,
84 /// sigreturn).
85 SuppressReturnValue = 1
86 };
87
88 /// Constructor.
89 SyscallDesc(const char *_name, FuncPtr _funcPtr, int _flags = 0)
90 : name(_name), funcPtr(_funcPtr), flags(_flags)
91 {
92 }
93
94 /// Emulate the syscall. Public interface for calling through funcPtr.
95 void doSyscall(int callnum, LiveProcess *proc, ThreadContext *tc);
96};
97
98
99class BaseBufferArg {
100
101 public:
102
103 BaseBufferArg(Addr _addr, int _size) : addr(_addr), size(_size)
104 {
105 bufPtr = new uint8_t[size];
106 // clear out buffer: in case we only partially populate this,
107 // and then do a copyOut(), we want to make sure we don't
108 // introduce any random junk into the simulated address space
109 memset(bufPtr, 0, size);
110 }
111
112 virtual ~BaseBufferArg() { delete [] bufPtr; }
113
114 //
115 // copy data into simulator space (read from target memory)
116 //
117 virtual bool copyIn(TranslatingPort *memport)
118 {
119 memport->readBlob(addr, bufPtr, size);
120 return true; // no EFAULT detection for now
121 }
122
123 //
124 // copy data out of simulator space (write to target memory)
125 //
126 virtual bool copyOut(TranslatingPort *memport)
127 {
128 memport->writeBlob(addr, bufPtr, size);
129 return true; // no EFAULT detection for now
130 }
131
132 protected:
133 Addr addr;
134 int size;
135 uint8_t *bufPtr;
136};
137
138
139class BufferArg : public BaseBufferArg
140{
141 public:
142 BufferArg(Addr _addr, int _size) : BaseBufferArg(_addr, _size) { }
143 void *bufferPtr() { return bufPtr; }
144};
145
146template <class T>
147class TypedBufferArg : public BaseBufferArg
148{
149 public:
150 // user can optionally specify a specific number of bytes to
151 // allocate to deal with those structs that have variable-size
152 // arrays at the end
153 TypedBufferArg(Addr _addr, int _size = sizeof(T))
154 : BaseBufferArg(_addr, _size)
155 { }
156
157 // type case
158 operator T*() { return (T *)bufPtr; }
159
160 // dereference operators
161 T &operator*() { return *((T *)bufPtr); }
162 T* operator->() { return (T *)bufPtr; }
163 T &operator[](int i) { return ((T *)bufPtr)[i]; }
164};
165
166//////////////////////////////////////////////////////////////////////
167//
168// The following emulation functions are generic enough that they
169// don't need to be recompiled for different emulated OS's. They are
170// defined in sim/syscall_emul.cc.
171//
172//////////////////////////////////////////////////////////////////////
173
174
175/// Handler for unimplemented syscalls that we haven't thought about.
176SyscallReturn unimplementedFunc(SyscallDesc *desc, int num,
177 LiveProcess *p, ThreadContext *tc);
178
179/// Handler for unimplemented syscalls that we never intend to
180/// implement (signal handling, etc.) and should not affect the correct
181/// behavior of the program. Print a warning only if the appropriate
182/// trace flag is enabled. Return success to the target program.
183SyscallReturn ignoreFunc(SyscallDesc *desc, int num,
184 LiveProcess *p, ThreadContext *tc);
185
186/// Target exit() handler: terminate simulation.
187SyscallReturn exitFunc(SyscallDesc *desc, int num,
188 LiveProcess *p, ThreadContext *tc);
189
190/// Target getpagesize() handler.
191SyscallReturn getpagesizeFunc(SyscallDesc *desc, int num,
192 LiveProcess *p, ThreadContext *tc);
193
194/// Target obreak() handler: set brk address.
195SyscallReturn obreakFunc(SyscallDesc *desc, int num,
196 LiveProcess *p, ThreadContext *tc);
197
198/// Target close() handler.
199SyscallReturn closeFunc(SyscallDesc *desc, int num,
200 LiveProcess *p, ThreadContext *tc);
201
202/// Target read() handler.
203SyscallReturn readFunc(SyscallDesc *desc, int num,
204 LiveProcess *p, ThreadContext *tc);
205
206/// Target write() handler.
207SyscallReturn writeFunc(SyscallDesc *desc, int num,
208 LiveProcess *p, ThreadContext *tc);
209
210/// Target lseek() handler.
211SyscallReturn lseekFunc(SyscallDesc *desc, int num,
212 LiveProcess *p, ThreadContext *tc);
213
214/// Target _llseek() handler.
215SyscallReturn _llseekFunc(SyscallDesc *desc, int num,
216 LiveProcess *p, ThreadContext *tc);
217
218/// Target munmap() handler.
219SyscallReturn munmapFunc(SyscallDesc *desc, int num,
220 LiveProcess *p, ThreadContext *tc);
221
222/// Target gethostname() handler.
223SyscallReturn gethostnameFunc(SyscallDesc *desc, int num,
224 LiveProcess *p, ThreadContext *tc);
225
226/// Target unlink() handler.
227SyscallReturn unlinkFunc(SyscallDesc *desc, int num,
228 LiveProcess *p, ThreadContext *tc);
229
230/// Target rename() handler.
231SyscallReturn renameFunc(SyscallDesc *desc, int num,
232 LiveProcess *p, ThreadContext *tc);
233
234
235/// Target truncate() handler.
236SyscallReturn truncateFunc(SyscallDesc *desc, int num,
237 LiveProcess *p, ThreadContext *tc);
238
239
240/// Target ftruncate() handler.
241SyscallReturn ftruncateFunc(SyscallDesc *desc, int num,
242 LiveProcess *p, ThreadContext *tc);
243
244
245/// Target chown() handler.
246SyscallReturn chownFunc(SyscallDesc *desc, int num,
247 LiveProcess *p, ThreadContext *tc);
248
249
250/// Target fchown() handler.
251SyscallReturn fchownFunc(SyscallDesc *desc, int num,
252 LiveProcess *p, ThreadContext *tc);
253
254/// Target dup() handler.
255SyscallReturn dupFunc(SyscallDesc *desc, int num,
256 LiveProcess *process, ThreadContext *tc);
257
258/// Target fnctl() handler.
259SyscallReturn fcntlFunc(SyscallDesc *desc, int num,
260 LiveProcess *process, ThreadContext *tc);
261
262/// Target fcntl64() handler.
263SyscallReturn fcntl64Func(SyscallDesc *desc, int num,
264 LiveProcess *process, ThreadContext *tc);
265
266/// Target setuid() handler.
267SyscallReturn setuidFunc(SyscallDesc *desc, int num,
268 LiveProcess *p, ThreadContext *tc);
269
270/// Target getpid() handler.
271SyscallReturn getpidFunc(SyscallDesc *desc, int num,
272 LiveProcess *p, ThreadContext *tc);
273
274/// Target getuid() handler.
275SyscallReturn getuidFunc(SyscallDesc *desc, int num,
276 LiveProcess *p, ThreadContext *tc);
277
278/// Target getgid() handler.
279SyscallReturn getgidFunc(SyscallDesc *desc, int num,
280 LiveProcess *p, ThreadContext *tc);
281
282/// Target getppid() handler.
283SyscallReturn getppidFunc(SyscallDesc *desc, int num,
284 LiveProcess *p, ThreadContext *tc);
285
286/// Target geteuid() handler.
287SyscallReturn geteuidFunc(SyscallDesc *desc, int num,
288 LiveProcess *p, ThreadContext *tc);
289
290/// Target getegid() handler.
291SyscallReturn getegidFunc(SyscallDesc *desc, int num,
292 LiveProcess *p, ThreadContext *tc);
293
294
295
296/// Pseudo Funcs - These functions use a different return convension,
297/// returning a second value in a register other than the normal return register
298SyscallReturn pipePseudoFunc(SyscallDesc *desc, int num,
299 LiveProcess *process, ThreadContext *tc);
300
301/// Target getpidPseudo() handler.
302SyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num,
303 LiveProcess *p, ThreadContext *tc);
304
305/// Target getuidPseudo() handler.
306SyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num,
307 LiveProcess *p, ThreadContext *tc);
308
309/// Target getgidPseudo() handler.
310SyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num,
311 LiveProcess *p, ThreadContext *tc);
312
313
314/// A readable name for 1,000,000, for converting microseconds to seconds.
315const int one_million = 1000000;
316
317/// Approximate seconds since the epoch (1/1/1970). About a billion,
318/// by my reckoning. We want to keep this a constant (not use the
319/// real-world time) to keep simulations repeatable.
320const unsigned seconds_since_epoch = 1000000000;
321
322/// Helper function to convert current elapsed time to seconds and
323/// microseconds.
324template <class T1, class T2>
325void
326getElapsedTime(T1 &sec, T2 &usec)
327{
328 int elapsed_usecs = curTick / Clock::Int::us;
329 sec = elapsed_usecs / one_million;
330 usec = elapsed_usecs % one_million;
331}
332
333//////////////////////////////////////////////////////////////////////
334//
335// The following emulation functions are generic, but need to be
336// templated to account for differences in types, constants, etc.
337//
338//////////////////////////////////////////////////////////////////////
339
340#if NO_STAT64
341 typedef struct stat hst_stat;
342 typedef struct stat hst_stat64;
343#else
344 typedef struct stat hst_stat;
345 typedef struct stat64 hst_stat64;
346#endif
347
348//// Helper function to convert a host stat buffer to a target stat
349//// buffer. Also copies the target buffer out to the simulated
350//// memory space. Used by stat(), fstat(), and lstat().
351
352template <typename target_stat, typename host_stat>
353static void
354convertStatBuf(target_stat &tgt, host_stat *host, bool fakeTTY = false)
355{
356 using namespace TheISA;
357
358 if (fakeTTY)
359 tgt->st_dev = 0xA;
360 else
361 tgt->st_dev = host->st_dev;
362 tgt->st_dev = htog(tgt->st_dev);
363 tgt->st_ino = host->st_ino;
364 tgt->st_ino = htog(tgt->st_ino);
365 tgt->st_mode = host->st_mode;
366 tgt->st_mode = htog(tgt->st_mode);
367 tgt->st_nlink = host->st_nlink;
368 tgt->st_nlink = htog(tgt->st_nlink);
369 tgt->st_uid = host->st_uid;
370 tgt->st_uid = htog(tgt->st_uid);
371 tgt->st_gid = host->st_gid;
372 tgt->st_gid = htog(tgt->st_gid);
373 if (fakeTTY)
374 tgt->st_rdev = 0x880d;
375 else
376 tgt->st_rdev = host->st_rdev;
377 tgt->st_rdev = htog(tgt->st_rdev);
378 tgt->st_size = host->st_size;
379 tgt->st_size = htog(tgt->st_size);
380 tgt->st_atimeX = host->st_atime;
381 tgt->st_atimeX = htog(tgt->st_atimeX);
382 tgt->st_mtimeX = host->st_mtime;
383 tgt->st_mtimeX = htog(tgt->st_mtimeX);
384 tgt->st_ctimeX = host->st_ctime;
385 tgt->st_ctimeX = htog(tgt->st_ctimeX);
386 // Force the block size to be 8k. This helps to ensure buffered io works
387 // consistently across different hosts.
388 tgt->st_blksize = 0x2000;
389 tgt->st_blksize = htog(tgt->st_blksize);
390 tgt->st_blocks = host->st_blocks;
391 tgt->st_blocks = htog(tgt->st_blocks);
392}
393
394// Same for stat64
395
396template <typename target_stat, typename host_stat64>
397static void
398convertStat64Buf(target_stat &tgt, host_stat64 *host, bool fakeTTY = false)
399{
400 using namespace TheISA;
401
402 convertStatBuf<target_stat, host_stat64>(tgt, host, fakeTTY);
403#if defined(STAT_HAVE_NSEC)
404 tgt->st_atime_nsec = host->st_atime_nsec;
405 tgt->st_atime_nsec = htog(tgt->st_atime_nsec);
406 tgt->st_mtime_nsec = host->st_mtime_nsec;
407 tgt->st_mtime_nsec = htog(tgt->st_mtime_nsec);
408 tgt->st_ctime_nsec = host->st_ctime_nsec;
409 tgt->st_ctime_nsec = htog(tgt->st_ctime_nsec);
410#else
411 tgt->st_atime_nsec = 0;
412 tgt->st_mtime_nsec = 0;
413 tgt->st_ctime_nsec = 0;
414#endif
415}
416
417//Here are a couple convenience functions
418template<class OS>
419static void
420copyOutStatBuf(TranslatingPort * mem, Addr addr,
421 hst_stat *host, bool fakeTTY = false)
422{
423 typedef TypedBufferArg<typename OS::tgt_stat> tgt_stat_buf;
424 tgt_stat_buf tgt(addr);
425 convertStatBuf<tgt_stat_buf, hst_stat>(tgt, host, fakeTTY);
426 tgt.copyOut(mem);
427}
428
429template<class OS>
430static void
431copyOutStat64Buf(TranslatingPort * mem, Addr addr,
432 hst_stat64 *host, bool fakeTTY = false)
433{
434 typedef TypedBufferArg<typename OS::tgt_stat64> tgt_stat_buf;
435 tgt_stat_buf tgt(addr);
436 convertStatBuf<tgt_stat_buf, hst_stat64>(tgt, host, fakeTTY);
437 tgt.copyOut(mem);
438}
439
440/// Target ioctl() handler. For the most part, programs call ioctl()
441/// only to find out if their stdout is a tty, to determine whether to
442/// do line or block buffering.
443template <class OS>
444SyscallReturn
445ioctlFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
446 ThreadContext *tc)
447{
448 int fd = tc->getSyscallArg(0);
449 unsigned req = tc->getSyscallArg(1);
450
451 DPRINTF(SyscallVerbose, "ioctl(%d, 0x%x, ...)\n", fd, req);
452
453 if (fd < 0 || process->sim_fd(fd) < 0) {
454 // doesn't map to any simulator fd: not a valid target fd
455 return -EBADF;
456 }
457
458 switch (req) {
459 case OS::TIOCISATTY_:
460 case OS::TIOCGETP_:
461 case OS::TIOCSETP_:
462 case OS::TIOCSETN_:
463 case OS::TIOCSETC_:
464 case OS::TIOCGETC_:
465 case OS::TIOCGETS_:
466 case OS::TIOCGETA_:
467 return -ENOTTY;
468
469 default:
470 fatal("Unsupported ioctl call: ioctl(%d, 0x%x, ...) @ 0x%llx\n",
471 fd, req, tc->readPC());
472 }
473}
474
475/// Target open() handler.
476template <class OS>
477SyscallReturn
478openFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
479 ThreadContext *tc)
480{
481 std::string path;
482
483 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
484 return -EFAULT;
485
486 if (path == "/dev/sysdev0") {
487 // This is a memory-mapped high-resolution timer device on Alpha.
488 // We don't support it, so just punt.
489 warn("Ignoring open(%s, ...)\n", path);
490 return -ENOENT;
491 }
492
493 int tgtFlags = tc->getSyscallArg(1);
494 int mode = tc->getSyscallArg(2);
495 int hostFlags = 0;
496
497 // translate open flags
498 for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) {
499 if (tgtFlags & OS::openFlagTable[i].tgtFlag) {
500 tgtFlags &= ~OS::openFlagTable[i].tgtFlag;
501 hostFlags |= OS::openFlagTable[i].hostFlag;
502 }
503 }
504
505 // any target flags left?
506 if (tgtFlags != 0)
507 warn("Syscall: open: cannot decode flags 0x%x", tgtFlags);
508
509#ifdef __CYGWIN32__
510 hostFlags |= O_BINARY;
511#endif
512
513 // Adjust path for current working directory
514 path = process->fullPath(path);
515
516 DPRINTF(SyscallVerbose, "opening file %s\n", path.c_str());
517
518 // open the file
519 int fd = open(path.c_str(), hostFlags, mode);
520
| 1/*
2 * Copyright (c) 2003-2005 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: Steve Reinhardt
29 * Kevin Lim
30 */
31
32#ifndef __SIM_SYSCALL_EMUL_HH__
33#define __SIM_SYSCALL_EMUL_HH__
34
35#define NO_STAT64 (defined(__APPLE__) || defined(__OpenBSD__) || \
36 defined(__FreeBSD__) || defined(__CYGWIN__))
37
38///
39/// @file syscall_emul.hh
40///
41/// This file defines objects used to emulate syscalls from the target
42/// application on the host machine.
43
44#include <errno.h>
45#include <string>
46#ifdef __CYGWIN32__
47#include <sys/fcntl.h> // for O_BINARY
48#endif
49#include <sys/stat.h>
50#include <fcntl.h>
51#include <sys/uio.h>
52
53#include "sim/host.hh" // for Addr
54#include "base/chunk_generator.hh"
55#include "base/intmath.hh" // for RoundUp
56#include "base/misc.hh"
57#include "base/trace.hh"
58#include "cpu/base.hh"
59#include "cpu/thread_context.hh"
60#include "mem/translating_port.hh"
61#include "mem/page_table.hh"
62#include "sim/process.hh"
63
64///
65/// System call descriptor.
66///
67class SyscallDesc {
68
69 public:
70
71 /// Typedef for target syscall handler functions.
72 typedef SyscallReturn (*FuncPtr)(SyscallDesc *, int num,
73 LiveProcess *, ThreadContext *);
74
75 const char *name; //!< Syscall name (e.g., "open").
76 FuncPtr funcPtr; //!< Pointer to emulation function.
77 int flags; //!< Flags (see Flags enum).
78
79 /// Flag values for controlling syscall behavior.
80 enum Flags {
81 /// Don't set return regs according to funcPtr return value.
82 /// Used for syscalls with non-standard return conventions
83 /// that explicitly set the ThreadContext regs (e.g.,
84 /// sigreturn).
85 SuppressReturnValue = 1
86 };
87
88 /// Constructor.
89 SyscallDesc(const char *_name, FuncPtr _funcPtr, int _flags = 0)
90 : name(_name), funcPtr(_funcPtr), flags(_flags)
91 {
92 }
93
94 /// Emulate the syscall. Public interface for calling through funcPtr.
95 void doSyscall(int callnum, LiveProcess *proc, ThreadContext *tc);
96};
97
98
99class BaseBufferArg {
100
101 public:
102
103 BaseBufferArg(Addr _addr, int _size) : addr(_addr), size(_size)
104 {
105 bufPtr = new uint8_t[size];
106 // clear out buffer: in case we only partially populate this,
107 // and then do a copyOut(), we want to make sure we don't
108 // introduce any random junk into the simulated address space
109 memset(bufPtr, 0, size);
110 }
111
112 virtual ~BaseBufferArg() { delete [] bufPtr; }
113
114 //
115 // copy data into simulator space (read from target memory)
116 //
117 virtual bool copyIn(TranslatingPort *memport)
118 {
119 memport->readBlob(addr, bufPtr, size);
120 return true; // no EFAULT detection for now
121 }
122
123 //
124 // copy data out of simulator space (write to target memory)
125 //
126 virtual bool copyOut(TranslatingPort *memport)
127 {
128 memport->writeBlob(addr, bufPtr, size);
129 return true; // no EFAULT detection for now
130 }
131
132 protected:
133 Addr addr;
134 int size;
135 uint8_t *bufPtr;
136};
137
138
139class BufferArg : public BaseBufferArg
140{
141 public:
142 BufferArg(Addr _addr, int _size) : BaseBufferArg(_addr, _size) { }
143 void *bufferPtr() { return bufPtr; }
144};
145
146template <class T>
147class TypedBufferArg : public BaseBufferArg
148{
149 public:
150 // user can optionally specify a specific number of bytes to
151 // allocate to deal with those structs that have variable-size
152 // arrays at the end
153 TypedBufferArg(Addr _addr, int _size = sizeof(T))
154 : BaseBufferArg(_addr, _size)
155 { }
156
157 // type case
158 operator T*() { return (T *)bufPtr; }
159
160 // dereference operators
161 T &operator*() { return *((T *)bufPtr); }
162 T* operator->() { return (T *)bufPtr; }
163 T &operator[](int i) { return ((T *)bufPtr)[i]; }
164};
165
166//////////////////////////////////////////////////////////////////////
167//
168// The following emulation functions are generic enough that they
169// don't need to be recompiled for different emulated OS's. They are
170// defined in sim/syscall_emul.cc.
171//
172//////////////////////////////////////////////////////////////////////
173
174
175/// Handler for unimplemented syscalls that we haven't thought about.
176SyscallReturn unimplementedFunc(SyscallDesc *desc, int num,
177 LiveProcess *p, ThreadContext *tc);
178
179/// Handler for unimplemented syscalls that we never intend to
180/// implement (signal handling, etc.) and should not affect the correct
181/// behavior of the program. Print a warning only if the appropriate
182/// trace flag is enabled. Return success to the target program.
183SyscallReturn ignoreFunc(SyscallDesc *desc, int num,
184 LiveProcess *p, ThreadContext *tc);
185
186/// Target exit() handler: terminate simulation.
187SyscallReturn exitFunc(SyscallDesc *desc, int num,
188 LiveProcess *p, ThreadContext *tc);
189
190/// Target getpagesize() handler.
191SyscallReturn getpagesizeFunc(SyscallDesc *desc, int num,
192 LiveProcess *p, ThreadContext *tc);
193
194/// Target obreak() handler: set brk address.
195SyscallReturn obreakFunc(SyscallDesc *desc, int num,
196 LiveProcess *p, ThreadContext *tc);
197
198/// Target close() handler.
199SyscallReturn closeFunc(SyscallDesc *desc, int num,
200 LiveProcess *p, ThreadContext *tc);
201
202/// Target read() handler.
203SyscallReturn readFunc(SyscallDesc *desc, int num,
204 LiveProcess *p, ThreadContext *tc);
205
206/// Target write() handler.
207SyscallReturn writeFunc(SyscallDesc *desc, int num,
208 LiveProcess *p, ThreadContext *tc);
209
210/// Target lseek() handler.
211SyscallReturn lseekFunc(SyscallDesc *desc, int num,
212 LiveProcess *p, ThreadContext *tc);
213
214/// Target _llseek() handler.
215SyscallReturn _llseekFunc(SyscallDesc *desc, int num,
216 LiveProcess *p, ThreadContext *tc);
217
218/// Target munmap() handler.
219SyscallReturn munmapFunc(SyscallDesc *desc, int num,
220 LiveProcess *p, ThreadContext *tc);
221
222/// Target gethostname() handler.
223SyscallReturn gethostnameFunc(SyscallDesc *desc, int num,
224 LiveProcess *p, ThreadContext *tc);
225
226/// Target unlink() handler.
227SyscallReturn unlinkFunc(SyscallDesc *desc, int num,
228 LiveProcess *p, ThreadContext *tc);
229
230/// Target rename() handler.
231SyscallReturn renameFunc(SyscallDesc *desc, int num,
232 LiveProcess *p, ThreadContext *tc);
233
234
235/// Target truncate() handler.
236SyscallReturn truncateFunc(SyscallDesc *desc, int num,
237 LiveProcess *p, ThreadContext *tc);
238
239
240/// Target ftruncate() handler.
241SyscallReturn ftruncateFunc(SyscallDesc *desc, int num,
242 LiveProcess *p, ThreadContext *tc);
243
244
245/// Target chown() handler.
246SyscallReturn chownFunc(SyscallDesc *desc, int num,
247 LiveProcess *p, ThreadContext *tc);
248
249
250/// Target fchown() handler.
251SyscallReturn fchownFunc(SyscallDesc *desc, int num,
252 LiveProcess *p, ThreadContext *tc);
253
254/// Target dup() handler.
255SyscallReturn dupFunc(SyscallDesc *desc, int num,
256 LiveProcess *process, ThreadContext *tc);
257
258/// Target fnctl() handler.
259SyscallReturn fcntlFunc(SyscallDesc *desc, int num,
260 LiveProcess *process, ThreadContext *tc);
261
262/// Target fcntl64() handler.
263SyscallReturn fcntl64Func(SyscallDesc *desc, int num,
264 LiveProcess *process, ThreadContext *tc);
265
266/// Target setuid() handler.
267SyscallReturn setuidFunc(SyscallDesc *desc, int num,
268 LiveProcess *p, ThreadContext *tc);
269
270/// Target getpid() handler.
271SyscallReturn getpidFunc(SyscallDesc *desc, int num,
272 LiveProcess *p, ThreadContext *tc);
273
274/// Target getuid() handler.
275SyscallReturn getuidFunc(SyscallDesc *desc, int num,
276 LiveProcess *p, ThreadContext *tc);
277
278/// Target getgid() handler.
279SyscallReturn getgidFunc(SyscallDesc *desc, int num,
280 LiveProcess *p, ThreadContext *tc);
281
282/// Target getppid() handler.
283SyscallReturn getppidFunc(SyscallDesc *desc, int num,
284 LiveProcess *p, ThreadContext *tc);
285
286/// Target geteuid() handler.
287SyscallReturn geteuidFunc(SyscallDesc *desc, int num,
288 LiveProcess *p, ThreadContext *tc);
289
290/// Target getegid() handler.
291SyscallReturn getegidFunc(SyscallDesc *desc, int num,
292 LiveProcess *p, ThreadContext *tc);
293
294
295
296/// Pseudo Funcs - These functions use a different return convension,
297/// returning a second value in a register other than the normal return register
298SyscallReturn pipePseudoFunc(SyscallDesc *desc, int num,
299 LiveProcess *process, ThreadContext *tc);
300
301/// Target getpidPseudo() handler.
302SyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num,
303 LiveProcess *p, ThreadContext *tc);
304
305/// Target getuidPseudo() handler.
306SyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num,
307 LiveProcess *p, ThreadContext *tc);
308
309/// Target getgidPseudo() handler.
310SyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num,
311 LiveProcess *p, ThreadContext *tc);
312
313
314/// A readable name for 1,000,000, for converting microseconds to seconds.
315const int one_million = 1000000;
316
317/// Approximate seconds since the epoch (1/1/1970). About a billion,
318/// by my reckoning. We want to keep this a constant (not use the
319/// real-world time) to keep simulations repeatable.
320const unsigned seconds_since_epoch = 1000000000;
321
322/// Helper function to convert current elapsed time to seconds and
323/// microseconds.
324template <class T1, class T2>
325void
326getElapsedTime(T1 &sec, T2 &usec)
327{
328 int elapsed_usecs = curTick / Clock::Int::us;
329 sec = elapsed_usecs / one_million;
330 usec = elapsed_usecs % one_million;
331}
332
333//////////////////////////////////////////////////////////////////////
334//
335// The following emulation functions are generic, but need to be
336// templated to account for differences in types, constants, etc.
337//
338//////////////////////////////////////////////////////////////////////
339
340#if NO_STAT64
341 typedef struct stat hst_stat;
342 typedef struct stat hst_stat64;
343#else
344 typedef struct stat hst_stat;
345 typedef struct stat64 hst_stat64;
346#endif
347
348//// Helper function to convert a host stat buffer to a target stat
349//// buffer. Also copies the target buffer out to the simulated
350//// memory space. Used by stat(), fstat(), and lstat().
351
352template <typename target_stat, typename host_stat>
353static void
354convertStatBuf(target_stat &tgt, host_stat *host, bool fakeTTY = false)
355{
356 using namespace TheISA;
357
358 if (fakeTTY)
359 tgt->st_dev = 0xA;
360 else
361 tgt->st_dev = host->st_dev;
362 tgt->st_dev = htog(tgt->st_dev);
363 tgt->st_ino = host->st_ino;
364 tgt->st_ino = htog(tgt->st_ino);
365 tgt->st_mode = host->st_mode;
366 tgt->st_mode = htog(tgt->st_mode);
367 tgt->st_nlink = host->st_nlink;
368 tgt->st_nlink = htog(tgt->st_nlink);
369 tgt->st_uid = host->st_uid;
370 tgt->st_uid = htog(tgt->st_uid);
371 tgt->st_gid = host->st_gid;
372 tgt->st_gid = htog(tgt->st_gid);
373 if (fakeTTY)
374 tgt->st_rdev = 0x880d;
375 else
376 tgt->st_rdev = host->st_rdev;
377 tgt->st_rdev = htog(tgt->st_rdev);
378 tgt->st_size = host->st_size;
379 tgt->st_size = htog(tgt->st_size);
380 tgt->st_atimeX = host->st_atime;
381 tgt->st_atimeX = htog(tgt->st_atimeX);
382 tgt->st_mtimeX = host->st_mtime;
383 tgt->st_mtimeX = htog(tgt->st_mtimeX);
384 tgt->st_ctimeX = host->st_ctime;
385 tgt->st_ctimeX = htog(tgt->st_ctimeX);
386 // Force the block size to be 8k. This helps to ensure buffered io works
387 // consistently across different hosts.
388 tgt->st_blksize = 0x2000;
389 tgt->st_blksize = htog(tgt->st_blksize);
390 tgt->st_blocks = host->st_blocks;
391 tgt->st_blocks = htog(tgt->st_blocks);
392}
393
394// Same for stat64
395
396template <typename target_stat, typename host_stat64>
397static void
398convertStat64Buf(target_stat &tgt, host_stat64 *host, bool fakeTTY = false)
399{
400 using namespace TheISA;
401
402 convertStatBuf<target_stat, host_stat64>(tgt, host, fakeTTY);
403#if defined(STAT_HAVE_NSEC)
404 tgt->st_atime_nsec = host->st_atime_nsec;
405 tgt->st_atime_nsec = htog(tgt->st_atime_nsec);
406 tgt->st_mtime_nsec = host->st_mtime_nsec;
407 tgt->st_mtime_nsec = htog(tgt->st_mtime_nsec);
408 tgt->st_ctime_nsec = host->st_ctime_nsec;
409 tgt->st_ctime_nsec = htog(tgt->st_ctime_nsec);
410#else
411 tgt->st_atime_nsec = 0;
412 tgt->st_mtime_nsec = 0;
413 tgt->st_ctime_nsec = 0;
414#endif
415}
416
417//Here are a couple convenience functions
418template<class OS>
419static void
420copyOutStatBuf(TranslatingPort * mem, Addr addr,
421 hst_stat *host, bool fakeTTY = false)
422{
423 typedef TypedBufferArg<typename OS::tgt_stat> tgt_stat_buf;
424 tgt_stat_buf tgt(addr);
425 convertStatBuf<tgt_stat_buf, hst_stat>(tgt, host, fakeTTY);
426 tgt.copyOut(mem);
427}
428
429template<class OS>
430static void
431copyOutStat64Buf(TranslatingPort * mem, Addr addr,
432 hst_stat64 *host, bool fakeTTY = false)
433{
434 typedef TypedBufferArg<typename OS::tgt_stat64> tgt_stat_buf;
435 tgt_stat_buf tgt(addr);
436 convertStatBuf<tgt_stat_buf, hst_stat64>(tgt, host, fakeTTY);
437 tgt.copyOut(mem);
438}
439
440/// Target ioctl() handler. For the most part, programs call ioctl()
441/// only to find out if their stdout is a tty, to determine whether to
442/// do line or block buffering.
443template <class OS>
444SyscallReturn
445ioctlFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
446 ThreadContext *tc)
447{
448 int fd = tc->getSyscallArg(0);
449 unsigned req = tc->getSyscallArg(1);
450
451 DPRINTF(SyscallVerbose, "ioctl(%d, 0x%x, ...)\n", fd, req);
452
453 if (fd < 0 || process->sim_fd(fd) < 0) {
454 // doesn't map to any simulator fd: not a valid target fd
455 return -EBADF;
456 }
457
458 switch (req) {
459 case OS::TIOCISATTY_:
460 case OS::TIOCGETP_:
461 case OS::TIOCSETP_:
462 case OS::TIOCSETN_:
463 case OS::TIOCSETC_:
464 case OS::TIOCGETC_:
465 case OS::TIOCGETS_:
466 case OS::TIOCGETA_:
467 return -ENOTTY;
468
469 default:
470 fatal("Unsupported ioctl call: ioctl(%d, 0x%x, ...) @ 0x%llx\n",
471 fd, req, tc->readPC());
472 }
473}
474
475/// Target open() handler.
476template <class OS>
477SyscallReturn
478openFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
479 ThreadContext *tc)
480{
481 std::string path;
482
483 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
484 return -EFAULT;
485
486 if (path == "/dev/sysdev0") {
487 // This is a memory-mapped high-resolution timer device on Alpha.
488 // We don't support it, so just punt.
489 warn("Ignoring open(%s, ...)\n", path);
490 return -ENOENT;
491 }
492
493 int tgtFlags = tc->getSyscallArg(1);
494 int mode = tc->getSyscallArg(2);
495 int hostFlags = 0;
496
497 // translate open flags
498 for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) {
499 if (tgtFlags & OS::openFlagTable[i].tgtFlag) {
500 tgtFlags &= ~OS::openFlagTable[i].tgtFlag;
501 hostFlags |= OS::openFlagTable[i].hostFlag;
502 }
503 }
504
505 // any target flags left?
506 if (tgtFlags != 0)
507 warn("Syscall: open: cannot decode flags 0x%x", tgtFlags);
508
509#ifdef __CYGWIN32__
510 hostFlags |= O_BINARY;
511#endif
512
513 // Adjust path for current working directory
514 path = process->fullPath(path);
515
516 DPRINTF(SyscallVerbose, "opening file %s\n", path.c_str());
517
518 // open the file
519 int fd = open(path.c_str(), hostFlags, mode);
520
|
522}
523
524
525/// Target chmod() handler.
526template <class OS>
527SyscallReturn
528chmodFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
529 ThreadContext *tc)
530{
531 std::string path;
532
533 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
534 return -EFAULT;
535
536 uint32_t mode = tc->getSyscallArg(1);
537 mode_t hostMode = 0;
538
539 // XXX translate mode flags via OS::something???
540 hostMode = mode;
541
542 // Adjust path for current working directory
543 path = process->fullPath(path);
544
545 // do the chmod
546 int result = chmod(path.c_str(), hostMode);
547 if (result < 0)
548 return -errno;
549
550 return 0;
551}
552
553
554/// Target fchmod() handler.
555template <class OS>
556SyscallReturn
557fchmodFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
558 ThreadContext *tc)
559{
560 int fd = tc->getSyscallArg(0);
561 if (fd < 0 || process->sim_fd(fd) < 0) {
562 // doesn't map to any simulator fd: not a valid target fd
563 return -EBADF;
564 }
565
566 uint32_t mode = tc->getSyscallArg(1);
567 mode_t hostMode = 0;
568
569 // XXX translate mode flags via OS::someting???
570 hostMode = mode;
571
572 // do the fchmod
573 int result = fchmod(process->sim_fd(fd), hostMode);
574 if (result < 0)
575 return -errno;
576
577 return 0;
578}
579
580
581/// Target stat() handler.
582template <class OS>
583SyscallReturn
584statFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
585 ThreadContext *tc)
586{
587 std::string path;
588
589 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
590 return -EFAULT;
591
592 // Adjust path for current working directory
593 path = process->fullPath(path);
594
595 struct stat hostBuf;
596 int result = stat(path.c_str(), &hostBuf);
597
598 if (result < 0)
599 return -errno;
600
601 copyOutStatBuf<OS>(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
602
603 return 0;
604}
605
606
607/// Target stat64() handler.
608template <class OS>
609SyscallReturn
610stat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
611 ThreadContext *tc)
612{
613 std::string path;
614
615 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
616 return -EFAULT;
617
618 // Adjust path for current working directory
619 path = process->fullPath(path);
620
621#if NO_STAT64
622 struct stat hostBuf;
623 int result = stat(path.c_str(), &hostBuf);
624#else
625 struct stat64 hostBuf;
626 int result = stat64(path.c_str(), &hostBuf);
627#endif
628
629 if (result < 0)
630 return -errno;
631
632 copyOutStat64Buf<OS>(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
633
634 return 0;
635}
636
637
638/// Target fstat64() handler.
639template <class OS>
640SyscallReturn
641fstat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
642 ThreadContext *tc)
643{
644 int fd = tc->getSyscallArg(0);
645 if (fd < 0 || process->sim_fd(fd) < 0) {
646 // doesn't map to any simulator fd: not a valid target fd
647 return -EBADF;
648 }
649
650#if NO_STAT64
651 struct stat hostBuf;
652 int result = fstat(process->sim_fd(fd), &hostBuf);
653#else
654 struct stat64 hostBuf;
655 int result = fstat64(process->sim_fd(fd), &hostBuf);
656#endif
657
658 if (result < 0)
659 return -errno;
660
661 copyOutStat64Buf<OS>(tc->getMemPort(), tc->getSyscallArg(1),
662 &hostBuf, (fd == 1));
663
664 return 0;
665}
666
667
668/// Target lstat() handler.
669template <class OS>
670SyscallReturn
671lstatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
672 ThreadContext *tc)
673{
674 std::string path;
675
676 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
677 return -EFAULT;
678
679 // Adjust path for current working directory
680 path = process->fullPath(path);
681
682 struct stat hostBuf;
683 int result = lstat(path.c_str(), &hostBuf);
684
685 if (result < 0)
686 return -errno;
687
688 copyOutStatBuf<OS>(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
689
690 return 0;
691}
692
693/// Target lstat64() handler.
694template <class OS>
695SyscallReturn
696lstat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
697 ThreadContext *tc)
698{
699 std::string path;
700
701 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
702 return -EFAULT;
703
704 // Adjust path for current working directory
705 path = process->fullPath(path);
706
707#if NO_STAT64
708 struct stat hostBuf;
709 int result = lstat(path.c_str(), &hostBuf);
710#else
711 struct stat64 hostBuf;
712 int result = lstat64(path.c_str(), &hostBuf);
713#endif
714
715 if (result < 0)
716 return -errno;
717
718 copyOutStat64Buf<OS>(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
719
720 return 0;
721}
722
723/// Target fstat() handler.
724template <class OS>
725SyscallReturn
726fstatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
727 ThreadContext *tc)
728{
729 int fd = process->sim_fd(tc->getSyscallArg(0));
730
731 DPRINTF(SyscallVerbose, "fstat(%d, ...)\n", fd);
732
733 if (fd < 0)
734 return -EBADF;
735
736 struct stat hostBuf;
737 int result = fstat(fd, &hostBuf);
738
739 if (result < 0)
740 return -errno;
741
742 copyOutStatBuf<OS>(tc->getMemPort(), tc->getSyscallArg(1),
743 &hostBuf, (fd == 1));
744
745 return 0;
746}
747
748
749/// Target statfs() handler.
750template <class OS>
751SyscallReturn
752statfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
753 ThreadContext *tc)
754{
755 std::string path;
756
757 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
758 return -EFAULT;
759
760 // Adjust path for current working directory
761 path = process->fullPath(path);
762
763 struct statfs hostBuf;
764 int result = statfs(path.c_str(), &hostBuf);
765
766 if (result < 0)
767 return -errno;
768
769 OS::copyOutStatfsBuf(tc->getMemPort(),
770 (Addr)(tc->getSyscallArg(1)), &hostBuf);
771
772 return 0;
773}
774
775
776/// Target fstatfs() handler.
777template <class OS>
778SyscallReturn
779fstatfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
780 ThreadContext *tc)
781{
782 int fd = process->sim_fd(tc->getSyscallArg(0));
783
784 if (fd < 0)
785 return -EBADF;
786
787 struct statfs hostBuf;
788 int result = fstatfs(fd, &hostBuf);
789
790 if (result < 0)
791 return -errno;
792
793 OS::copyOutStatfsBuf(tc->getMemPort(), tc->getSyscallArg(1),
794 &hostBuf);
795
796 return 0;
797}
798
799
800/// Target writev() handler.
801template <class OS>
802SyscallReturn
803writevFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
804 ThreadContext *tc)
805{
806 int fd = tc->getSyscallArg(0);
807 if (fd < 0 || process->sim_fd(fd) < 0) {
808 // doesn't map to any simulator fd: not a valid target fd
809 return -EBADF;
810 }
811
812 TranslatingPort *p = tc->getMemPort();
813 uint64_t tiov_base = tc->getSyscallArg(1);
814 size_t count = tc->getSyscallArg(2);
815 struct iovec hiov[count];
816 for (int i = 0; i < count; ++i)
817 {
818 typename OS::tgt_iovec tiov;
819
820 p->readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec),
821 (uint8_t*)&tiov, sizeof(typename OS::tgt_iovec));
822 hiov[i].iov_len = gtoh(tiov.iov_len);
823 hiov[i].iov_base = new char [hiov[i].iov_len];
824 p->readBlob(gtoh(tiov.iov_base), (uint8_t *)hiov[i].iov_base,
825 hiov[i].iov_len);
826 }
827
828 int result = writev(process->sim_fd(fd), hiov, count);
829
830 for (int i = 0; i < count; ++i)
831 {
832 delete [] (char *)hiov[i].iov_base;
833 }
834
835 if (result < 0)
836 return -errno;
837
838 return 0;
839}
840
841
842/// Target mmap() handler.
843///
844/// We don't really handle mmap(). If the target is mmaping an
845/// anonymous region or /dev/zero, we can get away with doing basically
846/// nothing (since memory is initialized to zero and the simulator
847/// doesn't really check addresses anyway). Always print a warning,
848/// since this could be seriously broken if we're not mapping
849/// /dev/zero.
850//
851/// Someday we should explicitly check for /dev/zero in open, flag the
852/// file descriptor, and fail (or implement!) a non-anonymous mmap to
853/// anything else.
854template <class OS>
855SyscallReturn
856mmapFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
857{
858 Addr start = tc->getSyscallArg(0);
859 uint64_t length = tc->getSyscallArg(1);
860 // int prot = tc->getSyscallArg(2);
861 int flags = tc->getSyscallArg(3);
862 // int fd = p->sim_fd(tc->getSyscallArg(4));
863 // int offset = tc->getSyscallArg(5);
864
865 if ((start % TheISA::VMPageSize) != 0 ||
866 (length % TheISA::VMPageSize) != 0) {
867 warn("mmap failing: arguments not page-aligned: "
868 "start 0x%x length 0x%x",
869 start, length);
870 return -EINVAL;
871 }
872
873 if (start != 0) {
874 warn("mmap: ignoring suggested map address 0x%x, using 0x%x",
875 start, p->mmap_end);
876 }
877
878 // pick next address from our "mmap region"
879 start = p->mmap_end;
880 p->pTable->allocate(start, length);
881 p->mmap_end += length;
882
883 if (!(flags & OS::TGT_MAP_ANONYMOUS)) {
884 warn("allowing mmap of file @ fd %d. "
885 "This will break if not /dev/zero.", tc->getSyscallArg(4));
886 }
887
888 return start;
889}
890
891/// Target getrlimit() handler.
892template <class OS>
893SyscallReturn
894getrlimitFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
895 ThreadContext *tc)
896{
897 unsigned resource = tc->getSyscallArg(0);
898 TypedBufferArg<typename OS::rlimit> rlp(tc->getSyscallArg(1));
899
900 switch (resource) {
901 case OS::TGT_RLIMIT_STACK:
902 // max stack size in bytes: make up a number (2MB for now)
903 rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024;
904 rlp->rlim_cur = htog(rlp->rlim_cur);
905 rlp->rlim_max = htog(rlp->rlim_max);
906 break;
907
908 default:
909 std::cerr << "getrlimitFunc: unimplemented resource " << resource
910 << std::endl;
911 abort();
912 break;
913 }
914
915 rlp.copyOut(tc->getMemPort());
916 return 0;
917}
918
919/// Target gettimeofday() handler.
920template <class OS>
921SyscallReturn
922gettimeofdayFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
923 ThreadContext *tc)
924{
925 TypedBufferArg<typename OS::timeval> tp(tc->getSyscallArg(0));
926
927 getElapsedTime(tp->tv_sec, tp->tv_usec);
928 tp->tv_sec += seconds_since_epoch;
929 tp->tv_sec = htog(tp->tv_sec);
930 tp->tv_usec = htog(tp->tv_usec);
931
932 tp.copyOut(tc->getMemPort());
933
934 return 0;
935}
936
937
938/// Target utimes() handler.
939template <class OS>
940SyscallReturn
941utimesFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
942 ThreadContext *tc)
943{
944 std::string path;
945
946 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
947 return -EFAULT;
948
949 TypedBufferArg<typename OS::timeval [2]> tp(tc->getSyscallArg(1));
950 tp.copyIn(tc->getMemPort());
951
952 struct timeval hostTimeval[2];
953 for (int i = 0; i < 2; ++i)
954 {
955 hostTimeval[i].tv_sec = gtoh((*tp)[i].tv_sec);
956 hostTimeval[i].tv_usec = gtoh((*tp)[i].tv_usec);
957 }
958
959 // Adjust path for current working directory
960 path = process->fullPath(path);
961
962 int result = utimes(path.c_str(), hostTimeval);
963
964 if (result < 0)
965 return -errno;
966
967 return 0;
968}
969/// Target getrusage() function.
970template <class OS>
971SyscallReturn
972getrusageFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
973 ThreadContext *tc)
974{
975 int who = tc->getSyscallArg(0); // THREAD, SELF, or CHILDREN
976 TypedBufferArg<typename OS::rusage> rup(tc->getSyscallArg(1));
977
978 rup->ru_utime.tv_sec = 0;
979 rup->ru_utime.tv_usec = 0;
980 rup->ru_stime.tv_sec = 0;
981 rup->ru_stime.tv_usec = 0;
982 rup->ru_maxrss = 0;
983 rup->ru_ixrss = 0;
984 rup->ru_idrss = 0;
985 rup->ru_isrss = 0;
986 rup->ru_minflt = 0;
987 rup->ru_majflt = 0;
988 rup->ru_nswap = 0;
989 rup->ru_inblock = 0;
990 rup->ru_oublock = 0;
991 rup->ru_msgsnd = 0;
992 rup->ru_msgrcv = 0;
993 rup->ru_nsignals = 0;
994 rup->ru_nvcsw = 0;
995 rup->ru_nivcsw = 0;
996
997 switch (who) {
998 case OS::TGT_RUSAGE_SELF:
999 getElapsedTime(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec);
1000 rup->ru_utime.tv_sec = htog(rup->ru_utime.tv_sec);
1001 rup->ru_utime.tv_usec = htog(rup->ru_utime.tv_usec);
1002 break;
1003
1004 case OS::TGT_RUSAGE_CHILDREN:
1005 // do nothing. We have no child processes, so they take no time.
1006 break;
1007
1008 default:
1009 // don't really handle THREAD or CHILDREN, but just warn and
1010 // plow ahead
1011 warn("getrusage() only supports RUSAGE_SELF. Parameter %d ignored.",
1012 who);
1013 }
1014
1015 rup.copyOut(tc->getMemPort());
1016
1017 return 0;
1018}
1019
1020
1021
1022
1023#endif // __SIM_SYSCALL_EMUL_HH__
| 522}
523
524
525/// Target chmod() handler.
526template <class OS>
527SyscallReturn
528chmodFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
529 ThreadContext *tc)
530{
531 std::string path;
532
533 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
534 return -EFAULT;
535
536 uint32_t mode = tc->getSyscallArg(1);
537 mode_t hostMode = 0;
538
539 // XXX translate mode flags via OS::something???
540 hostMode = mode;
541
542 // Adjust path for current working directory
543 path = process->fullPath(path);
544
545 // do the chmod
546 int result = chmod(path.c_str(), hostMode);
547 if (result < 0)
548 return -errno;
549
550 return 0;
551}
552
553
554/// Target fchmod() handler.
555template <class OS>
556SyscallReturn
557fchmodFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
558 ThreadContext *tc)
559{
560 int fd = tc->getSyscallArg(0);
561 if (fd < 0 || process->sim_fd(fd) < 0) {
562 // doesn't map to any simulator fd: not a valid target fd
563 return -EBADF;
564 }
565
566 uint32_t mode = tc->getSyscallArg(1);
567 mode_t hostMode = 0;
568
569 // XXX translate mode flags via OS::someting???
570 hostMode = mode;
571
572 // do the fchmod
573 int result = fchmod(process->sim_fd(fd), hostMode);
574 if (result < 0)
575 return -errno;
576
577 return 0;
578}
579
580
581/// Target stat() handler.
582template <class OS>
583SyscallReturn
584statFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
585 ThreadContext *tc)
586{
587 std::string path;
588
589 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
590 return -EFAULT;
591
592 // Adjust path for current working directory
593 path = process->fullPath(path);
594
595 struct stat hostBuf;
596 int result = stat(path.c_str(), &hostBuf);
597
598 if (result < 0)
599 return -errno;
600
601 copyOutStatBuf<OS>(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
602
603 return 0;
604}
605
606
607/// Target stat64() handler.
608template <class OS>
609SyscallReturn
610stat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
611 ThreadContext *tc)
612{
613 std::string path;
614
615 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
616 return -EFAULT;
617
618 // Adjust path for current working directory
619 path = process->fullPath(path);
620
621#if NO_STAT64
622 struct stat hostBuf;
623 int result = stat(path.c_str(), &hostBuf);
624#else
625 struct stat64 hostBuf;
626 int result = stat64(path.c_str(), &hostBuf);
627#endif
628
629 if (result < 0)
630 return -errno;
631
632 copyOutStat64Buf<OS>(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
633
634 return 0;
635}
636
637
638/// Target fstat64() handler.
639template <class OS>
640SyscallReturn
641fstat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
642 ThreadContext *tc)
643{
644 int fd = tc->getSyscallArg(0);
645 if (fd < 0 || process->sim_fd(fd) < 0) {
646 // doesn't map to any simulator fd: not a valid target fd
647 return -EBADF;
648 }
649
650#if NO_STAT64
651 struct stat hostBuf;
652 int result = fstat(process->sim_fd(fd), &hostBuf);
653#else
654 struct stat64 hostBuf;
655 int result = fstat64(process->sim_fd(fd), &hostBuf);
656#endif
657
658 if (result < 0)
659 return -errno;
660
661 copyOutStat64Buf<OS>(tc->getMemPort(), tc->getSyscallArg(1),
662 &hostBuf, (fd == 1));
663
664 return 0;
665}
666
667
668/// Target lstat() handler.
669template <class OS>
670SyscallReturn
671lstatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
672 ThreadContext *tc)
673{
674 std::string path;
675
676 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
677 return -EFAULT;
678
679 // Adjust path for current working directory
680 path = process->fullPath(path);
681
682 struct stat hostBuf;
683 int result = lstat(path.c_str(), &hostBuf);
684
685 if (result < 0)
686 return -errno;
687
688 copyOutStatBuf<OS>(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
689
690 return 0;
691}
692
693/// Target lstat64() handler.
694template <class OS>
695SyscallReturn
696lstat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
697 ThreadContext *tc)
698{
699 std::string path;
700
701 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
702 return -EFAULT;
703
704 // Adjust path for current working directory
705 path = process->fullPath(path);
706
707#if NO_STAT64
708 struct stat hostBuf;
709 int result = lstat(path.c_str(), &hostBuf);
710#else
711 struct stat64 hostBuf;
712 int result = lstat64(path.c_str(), &hostBuf);
713#endif
714
715 if (result < 0)
716 return -errno;
717
718 copyOutStat64Buf<OS>(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
719
720 return 0;
721}
722
723/// Target fstat() handler.
724template <class OS>
725SyscallReturn
726fstatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
727 ThreadContext *tc)
728{
729 int fd = process->sim_fd(tc->getSyscallArg(0));
730
731 DPRINTF(SyscallVerbose, "fstat(%d, ...)\n", fd);
732
733 if (fd < 0)
734 return -EBADF;
735
736 struct stat hostBuf;
737 int result = fstat(fd, &hostBuf);
738
739 if (result < 0)
740 return -errno;
741
742 copyOutStatBuf<OS>(tc->getMemPort(), tc->getSyscallArg(1),
743 &hostBuf, (fd == 1));
744
745 return 0;
746}
747
748
749/// Target statfs() handler.
750template <class OS>
751SyscallReturn
752statfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
753 ThreadContext *tc)
754{
755 std::string path;
756
757 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
758 return -EFAULT;
759
760 // Adjust path for current working directory
761 path = process->fullPath(path);
762
763 struct statfs hostBuf;
764 int result = statfs(path.c_str(), &hostBuf);
765
766 if (result < 0)
767 return -errno;
768
769 OS::copyOutStatfsBuf(tc->getMemPort(),
770 (Addr)(tc->getSyscallArg(1)), &hostBuf);
771
772 return 0;
773}
774
775
776/// Target fstatfs() handler.
777template <class OS>
778SyscallReturn
779fstatfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
780 ThreadContext *tc)
781{
782 int fd = process->sim_fd(tc->getSyscallArg(0));
783
784 if (fd < 0)
785 return -EBADF;
786
787 struct statfs hostBuf;
788 int result = fstatfs(fd, &hostBuf);
789
790 if (result < 0)
791 return -errno;
792
793 OS::copyOutStatfsBuf(tc->getMemPort(), tc->getSyscallArg(1),
794 &hostBuf);
795
796 return 0;
797}
798
799
800/// Target writev() handler.
801template <class OS>
802SyscallReturn
803writevFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
804 ThreadContext *tc)
805{
806 int fd = tc->getSyscallArg(0);
807 if (fd < 0 || process->sim_fd(fd) < 0) {
808 // doesn't map to any simulator fd: not a valid target fd
809 return -EBADF;
810 }
811
812 TranslatingPort *p = tc->getMemPort();
813 uint64_t tiov_base = tc->getSyscallArg(1);
814 size_t count = tc->getSyscallArg(2);
815 struct iovec hiov[count];
816 for (int i = 0; i < count; ++i)
817 {
818 typename OS::tgt_iovec tiov;
819
820 p->readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec),
821 (uint8_t*)&tiov, sizeof(typename OS::tgt_iovec));
822 hiov[i].iov_len = gtoh(tiov.iov_len);
823 hiov[i].iov_base = new char [hiov[i].iov_len];
824 p->readBlob(gtoh(tiov.iov_base), (uint8_t *)hiov[i].iov_base,
825 hiov[i].iov_len);
826 }
827
828 int result = writev(process->sim_fd(fd), hiov, count);
829
830 for (int i = 0; i < count; ++i)
831 {
832 delete [] (char *)hiov[i].iov_base;
833 }
834
835 if (result < 0)
836 return -errno;
837
838 return 0;
839}
840
841
842/// Target mmap() handler.
843///
844/// We don't really handle mmap(). If the target is mmaping an
845/// anonymous region or /dev/zero, we can get away with doing basically
846/// nothing (since memory is initialized to zero and the simulator
847/// doesn't really check addresses anyway). Always print a warning,
848/// since this could be seriously broken if we're not mapping
849/// /dev/zero.
850//
851/// Someday we should explicitly check for /dev/zero in open, flag the
852/// file descriptor, and fail (or implement!) a non-anonymous mmap to
853/// anything else.
854template <class OS>
855SyscallReturn
856mmapFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
857{
858 Addr start = tc->getSyscallArg(0);
859 uint64_t length = tc->getSyscallArg(1);
860 // int prot = tc->getSyscallArg(2);
861 int flags = tc->getSyscallArg(3);
862 // int fd = p->sim_fd(tc->getSyscallArg(4));
863 // int offset = tc->getSyscallArg(5);
864
865 if ((start % TheISA::VMPageSize) != 0 ||
866 (length % TheISA::VMPageSize) != 0) {
867 warn("mmap failing: arguments not page-aligned: "
868 "start 0x%x length 0x%x",
869 start, length);
870 return -EINVAL;
871 }
872
873 if (start != 0) {
874 warn("mmap: ignoring suggested map address 0x%x, using 0x%x",
875 start, p->mmap_end);
876 }
877
878 // pick next address from our "mmap region"
879 start = p->mmap_end;
880 p->pTable->allocate(start, length);
881 p->mmap_end += length;
882
883 if (!(flags & OS::TGT_MAP_ANONYMOUS)) {
884 warn("allowing mmap of file @ fd %d. "
885 "This will break if not /dev/zero.", tc->getSyscallArg(4));
886 }
887
888 return start;
889}
890
891/// Target getrlimit() handler.
892template <class OS>
893SyscallReturn
894getrlimitFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
895 ThreadContext *tc)
896{
897 unsigned resource = tc->getSyscallArg(0);
898 TypedBufferArg<typename OS::rlimit> rlp(tc->getSyscallArg(1));
899
900 switch (resource) {
901 case OS::TGT_RLIMIT_STACK:
902 // max stack size in bytes: make up a number (2MB for now)
903 rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024;
904 rlp->rlim_cur = htog(rlp->rlim_cur);
905 rlp->rlim_max = htog(rlp->rlim_max);
906 break;
907
908 default:
909 std::cerr << "getrlimitFunc: unimplemented resource " << resource
910 << std::endl;
911 abort();
912 break;
913 }
914
915 rlp.copyOut(tc->getMemPort());
916 return 0;
917}
918
919/// Target gettimeofday() handler.
920template <class OS>
921SyscallReturn
922gettimeofdayFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
923 ThreadContext *tc)
924{
925 TypedBufferArg<typename OS::timeval> tp(tc->getSyscallArg(0));
926
927 getElapsedTime(tp->tv_sec, tp->tv_usec);
928 tp->tv_sec += seconds_since_epoch;
929 tp->tv_sec = htog(tp->tv_sec);
930 tp->tv_usec = htog(tp->tv_usec);
931
932 tp.copyOut(tc->getMemPort());
933
934 return 0;
935}
936
937
938/// Target utimes() handler.
939template <class OS>
940SyscallReturn
941utimesFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
942 ThreadContext *tc)
943{
944 std::string path;
945
946 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
947 return -EFAULT;
948
949 TypedBufferArg<typename OS::timeval [2]> tp(tc->getSyscallArg(1));
950 tp.copyIn(tc->getMemPort());
951
952 struct timeval hostTimeval[2];
953 for (int i = 0; i < 2; ++i)
954 {
955 hostTimeval[i].tv_sec = gtoh((*tp)[i].tv_sec);
956 hostTimeval[i].tv_usec = gtoh((*tp)[i].tv_usec);
957 }
958
959 // Adjust path for current working directory
960 path = process->fullPath(path);
961
962 int result = utimes(path.c_str(), hostTimeval);
963
964 if (result < 0)
965 return -errno;
966
967 return 0;
968}
969/// Target getrusage() function.
970template <class OS>
971SyscallReturn
972getrusageFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
973 ThreadContext *tc)
974{
975 int who = tc->getSyscallArg(0); // THREAD, SELF, or CHILDREN
976 TypedBufferArg<typename OS::rusage> rup(tc->getSyscallArg(1));
977
978 rup->ru_utime.tv_sec = 0;
979 rup->ru_utime.tv_usec = 0;
980 rup->ru_stime.tv_sec = 0;
981 rup->ru_stime.tv_usec = 0;
982 rup->ru_maxrss = 0;
983 rup->ru_ixrss = 0;
984 rup->ru_idrss = 0;
985 rup->ru_isrss = 0;
986 rup->ru_minflt = 0;
987 rup->ru_majflt = 0;
988 rup->ru_nswap = 0;
989 rup->ru_inblock = 0;
990 rup->ru_oublock = 0;
991 rup->ru_msgsnd = 0;
992 rup->ru_msgrcv = 0;
993 rup->ru_nsignals = 0;
994 rup->ru_nvcsw = 0;
995 rup->ru_nivcsw = 0;
996
997 switch (who) {
998 case OS::TGT_RUSAGE_SELF:
999 getElapsedTime(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec);
1000 rup->ru_utime.tv_sec = htog(rup->ru_utime.tv_sec);
1001 rup->ru_utime.tv_usec = htog(rup->ru_utime.tv_usec);
1002 break;
1003
1004 case OS::TGT_RUSAGE_CHILDREN:
1005 // do nothing. We have no child processes, so they take no time.
1006 break;
1007
1008 default:
1009 // don't really handle THREAD or CHILDREN, but just warn and
1010 // plow ahead
1011 warn("getrusage() only supports RUSAGE_SELF. Parameter %d ignored.",
1012 who);
1013 }
1014
1015 rup.copyOut(tc->getMemPort());
1016
1017 return 0;
1018}
1019
1020
1021
1022
1023#endif // __SIM_SYSCALL_EMUL_HH__
|