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 brk() handler: set brk address.
195SyscallReturn brkFunc(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 getcwd() handler.
227SyscallReturn getcwdFunc(SyscallDesc *desc, int num,
228 LiveProcess *p, ThreadContext *tc);
229
230/// Target unlink() handler.
231SyscallReturn readlinkFunc(SyscallDesc *desc, int num,
232 LiveProcess *p, ThreadContext *tc);
233
234/// Target unlink() handler.
235SyscallReturn unlinkFunc(SyscallDesc *desc, int num,
236 LiveProcess *p, ThreadContext *tc);
237
238/// Target mkdir() handler.
239SyscallReturn mkdirFunc(SyscallDesc *desc, int num,
240 LiveProcess *p, ThreadContext *tc);
241
242/// Target rename() handler.
243SyscallReturn renameFunc(SyscallDesc *desc, int num,
244 LiveProcess *p, ThreadContext *tc);
245
246
247/// Target truncate() handler.
248SyscallReturn truncateFunc(SyscallDesc *desc, int num,
249 LiveProcess *p, ThreadContext *tc);
250
251
252/// Target ftruncate() handler.
253SyscallReturn ftruncateFunc(SyscallDesc *desc, int num,
254 LiveProcess *p, ThreadContext *tc);
255
256
257/// Target umask() handler.
258SyscallReturn umaskFunc(SyscallDesc *desc, int num,
259 LiveProcess *p, ThreadContext *tc);
260
261
262/// Target chown() handler.
263SyscallReturn chownFunc(SyscallDesc *desc, int num,
264 LiveProcess *p, ThreadContext *tc);
265
266
267/// Target fchown() handler.
268SyscallReturn fchownFunc(SyscallDesc *desc, int num,
269 LiveProcess *p, ThreadContext *tc);
270
271/// Target dup() handler.
272SyscallReturn dupFunc(SyscallDesc *desc, int num,
273 LiveProcess *process, ThreadContext *tc);
274
275/// Target fnctl() handler.
276SyscallReturn fcntlFunc(SyscallDesc *desc, int num,
277 LiveProcess *process, ThreadContext *tc);
278
279/// Target fcntl64() handler.
280SyscallReturn fcntl64Func(SyscallDesc *desc, int num,
281 LiveProcess *process, ThreadContext *tc);
282
283/// Target setuid() handler.
284SyscallReturn setuidFunc(SyscallDesc *desc, int num,
285 LiveProcess *p, ThreadContext *tc);
286
287/// Target getpid() handler.
288SyscallReturn getpidFunc(SyscallDesc *desc, int num,
289 LiveProcess *p, ThreadContext *tc);
290
291/// Target getuid() handler.
292SyscallReturn getuidFunc(SyscallDesc *desc, int num,
293 LiveProcess *p, ThreadContext *tc);
294
295/// Target getgid() handler.
296SyscallReturn getgidFunc(SyscallDesc *desc, int num,
297 LiveProcess *p, ThreadContext *tc);
298
299/// Target getppid() handler.
300SyscallReturn getppidFunc(SyscallDesc *desc, int num,
301 LiveProcess *p, ThreadContext *tc);
302
303/// Target geteuid() handler.
304SyscallReturn geteuidFunc(SyscallDesc *desc, int num,
305 LiveProcess *p, ThreadContext *tc);
306
307/// Target getegid() handler.
308SyscallReturn getegidFunc(SyscallDesc *desc, int num,
309 LiveProcess *p, ThreadContext *tc);
310
311
312
313/// Pseudo Funcs - These functions use a different return convension,
314/// returning a second value in a register other than the normal return register
315SyscallReturn pipePseudoFunc(SyscallDesc *desc, int num,
316 LiveProcess *process, ThreadContext *tc);
317
318/// Target getpidPseudo() handler.
319SyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num,
320 LiveProcess *p, ThreadContext *tc);
321
322/// Target getuidPseudo() handler.
323SyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num,
324 LiveProcess *p, ThreadContext *tc);
325
326/// Target getgidPseudo() handler.
327SyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num,
328 LiveProcess *p, ThreadContext *tc);
329
330
331/// A readable name for 1,000,000, for converting microseconds to seconds.
332const int one_million = 1000000;
333
334/// Approximate seconds since the epoch (1/1/1970). About a billion,
335/// by my reckoning. We want to keep this a constant (not use the
336/// real-world time) to keep simulations repeatable.
337const unsigned seconds_since_epoch = 1000000000;
338
339/// Helper function to convert current elapsed time to seconds and
340/// microseconds.
341template <class T1, class T2>
342void
343getElapsedTime(T1 &sec, T2 &usec)
344{
345 int elapsed_usecs = curTick / Clock::Int::us;
346 sec = elapsed_usecs / one_million;
347 usec = elapsed_usecs % one_million;
348}
349
350//////////////////////////////////////////////////////////////////////
351//
352// The following emulation functions are generic, but need to be
353// templated to account for differences in types, constants, etc.
354//
355//////////////////////////////////////////////////////////////////////
356
357#if NO_STAT64
358 typedef struct stat hst_stat;
359 typedef struct stat hst_stat64;
360#else
361 typedef struct stat hst_stat;
362 typedef struct stat64 hst_stat64;
363#endif
364
365//// Helper function to convert a host stat buffer to a target stat
366//// buffer. Also copies the target buffer out to the simulated
367//// memory space. Used by stat(), fstat(), and lstat().
368
369template <typename target_stat, typename host_stat>
370static void
371convertStatBuf(target_stat &tgt, host_stat *host, bool fakeTTY = false)
372{
373 using namespace TheISA;
374
375 if (fakeTTY)
376 tgt->st_dev = 0xA;
377 else
378 tgt->st_dev = host->st_dev;
379 tgt->st_dev = htog(tgt->st_dev);
380 tgt->st_ino = host->st_ino;
381 tgt->st_ino = htog(tgt->st_ino);
382 tgt->st_mode = host->st_mode;
383 if (fakeTTY) {
384 // Claim to be a character device
385 tgt->st_mode &= ~S_IFMT; // Clear S_IFMT
386 tgt->st_mode |= S_IFCHR; // Set S_IFCHR
387 }
388 tgt->st_mode = htog(tgt->st_mode);
389 tgt->st_nlink = host->st_nlink;
390 tgt->st_nlink = htog(tgt->st_nlink);
391 tgt->st_uid = host->st_uid;
392 tgt->st_uid = htog(tgt->st_uid);
393 tgt->st_gid = host->st_gid;
394 tgt->st_gid = htog(tgt->st_gid);
395 if (fakeTTY)
396 tgt->st_rdev = 0x880d;
397 else
398 tgt->st_rdev = host->st_rdev;
399 tgt->st_rdev = htog(tgt->st_rdev);
400 tgt->st_size = host->st_size;
401 tgt->st_size = htog(tgt->st_size);
402 tgt->st_atimeX = host->st_atime;
403 tgt->st_atimeX = htog(tgt->st_atimeX);
404 tgt->st_mtimeX = host->st_mtime;
405 tgt->st_mtimeX = htog(tgt->st_mtimeX);
406 tgt->st_ctimeX = host->st_ctime;
407 tgt->st_ctimeX = htog(tgt->st_ctimeX);
408 // Force the block size to be 8k. This helps to ensure buffered io works
409 // consistently across different hosts.
410 tgt->st_blksize = 0x2000;
411 tgt->st_blksize = htog(tgt->st_blksize);
412 tgt->st_blocks = host->st_blocks;
413 tgt->st_blocks = htog(tgt->st_blocks);
414}
415
416// Same for stat64
417
418template <typename target_stat, typename host_stat64>
419static void
420convertStat64Buf(target_stat &tgt, host_stat64 *host, bool fakeTTY = false)
421{
422 using namespace TheISA;
423
424 convertStatBuf<target_stat, host_stat64>(tgt, host, fakeTTY);
425#if defined(STAT_HAVE_NSEC)
426 tgt->st_atime_nsec = host->st_atime_nsec;
427 tgt->st_atime_nsec = htog(tgt->st_atime_nsec);
428 tgt->st_mtime_nsec = host->st_mtime_nsec;
429 tgt->st_mtime_nsec = htog(tgt->st_mtime_nsec);
430 tgt->st_ctime_nsec = host->st_ctime_nsec;
431 tgt->st_ctime_nsec = htog(tgt->st_ctime_nsec);
432#else
433 tgt->st_atime_nsec = 0;
434 tgt->st_mtime_nsec = 0;
435 tgt->st_ctime_nsec = 0;
436#endif
437}
438
439//Here are a couple convenience functions
440template<class OS>
441static void
442copyOutStatBuf(TranslatingPort * mem, Addr addr,
443 hst_stat *host, bool fakeTTY = false)
444{
445 typedef TypedBufferArg<typename OS::tgt_stat> tgt_stat_buf;
446 tgt_stat_buf tgt(addr);
447 convertStatBuf<tgt_stat_buf, hst_stat>(tgt, host, fakeTTY);
448 tgt.copyOut(mem);
449}
450
451template<class OS>
452static void
453copyOutStat64Buf(TranslatingPort * mem, Addr addr,
454 hst_stat64 *host, bool fakeTTY = false)
455{
456 typedef TypedBufferArg<typename OS::tgt_stat64> tgt_stat_buf;
457 tgt_stat_buf tgt(addr);
458 convertStatBuf<tgt_stat_buf, hst_stat64>(tgt, host, fakeTTY);
459 tgt.copyOut(mem);
460}
461
462/// Target ioctl() handler. For the most part, programs call ioctl()
463/// only to find out if their stdout is a tty, to determine whether to
464/// do line or block buffering.
465template <class OS>
466SyscallReturn
467ioctlFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
468 ThreadContext *tc)
469{
470 int fd = tc->getSyscallArg(0);
471 unsigned req = tc->getSyscallArg(1);
472
473 DPRINTF(SyscallVerbose, "ioctl(%d, 0x%x, ...)\n", fd, req);
474
475 if (fd < 0 || process->sim_fd(fd) < 0) {
476 // doesn't map to any simulator fd: not a valid target fd
477 return -EBADF;
478 }
479
480 switch (req) {
481 case OS::TIOCISATTY_:
482 case OS::TIOCGETP_:
483 case OS::TIOCSETP_:
484 case OS::TIOCSETN_:
485 case OS::TIOCSETC_:
486 case OS::TIOCGETC_:
487 case OS::TIOCGETS_:
488 case OS::TIOCGETA_:
489 return -ENOTTY;
490
491 default:
492 fatal("Unsupported ioctl call: ioctl(%d, 0x%x, ...) @ 0x%llx\n",
493 fd, req, tc->readPC());
494 }
495}
496
497/// Target open() handler.
498template <class OS>
499SyscallReturn
500openFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
501 ThreadContext *tc)
502{
503 std::string path;
504
505 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
506 return -EFAULT;
507
508 if (path == "/dev/sysdev0") {
509 // This is a memory-mapped high-resolution timer device on Alpha.
510 // We don't support it, so just punt.
511 warn("Ignoring open(%s, ...)\n", path);
512 return -ENOENT;
513 }
514
515 int tgtFlags = tc->getSyscallArg(1);
516 int mode = tc->getSyscallArg(2);
517 int hostFlags = 0;
518
519 // translate open flags
520 for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) {
521 if (tgtFlags & OS::openFlagTable[i].tgtFlag) {
522 tgtFlags &= ~OS::openFlagTable[i].tgtFlag;
523 hostFlags |= OS::openFlagTable[i].hostFlag;
524 }
525 }
526
527 // any target flags left?
528 if (tgtFlags != 0)
529 warn("Syscall: open: cannot decode flags 0x%x", tgtFlags);
530
531#ifdef __CYGWIN32__
532 hostFlags |= O_BINARY;
533#endif
534
535 // Adjust path for current working directory
536 path = process->fullPath(path);
537
538 DPRINTF(SyscallVerbose, "opening file %s\n", path.c_str());
539
| 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 brk() handler: set brk address.
195SyscallReturn brkFunc(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 getcwd() handler.
227SyscallReturn getcwdFunc(SyscallDesc *desc, int num,
228 LiveProcess *p, ThreadContext *tc);
229
230/// Target unlink() handler.
231SyscallReturn readlinkFunc(SyscallDesc *desc, int num,
232 LiveProcess *p, ThreadContext *tc);
233
234/// Target unlink() handler.
235SyscallReturn unlinkFunc(SyscallDesc *desc, int num,
236 LiveProcess *p, ThreadContext *tc);
237
238/// Target mkdir() handler.
239SyscallReturn mkdirFunc(SyscallDesc *desc, int num,
240 LiveProcess *p, ThreadContext *tc);
241
242/// Target rename() handler.
243SyscallReturn renameFunc(SyscallDesc *desc, int num,
244 LiveProcess *p, ThreadContext *tc);
245
246
247/// Target truncate() handler.
248SyscallReturn truncateFunc(SyscallDesc *desc, int num,
249 LiveProcess *p, ThreadContext *tc);
250
251
252/// Target ftruncate() handler.
253SyscallReturn ftruncateFunc(SyscallDesc *desc, int num,
254 LiveProcess *p, ThreadContext *tc);
255
256
257/// Target umask() handler.
258SyscallReturn umaskFunc(SyscallDesc *desc, int num,
259 LiveProcess *p, ThreadContext *tc);
260
261
262/// Target chown() handler.
263SyscallReturn chownFunc(SyscallDesc *desc, int num,
264 LiveProcess *p, ThreadContext *tc);
265
266
267/// Target fchown() handler.
268SyscallReturn fchownFunc(SyscallDesc *desc, int num,
269 LiveProcess *p, ThreadContext *tc);
270
271/// Target dup() handler.
272SyscallReturn dupFunc(SyscallDesc *desc, int num,
273 LiveProcess *process, ThreadContext *tc);
274
275/// Target fnctl() handler.
276SyscallReturn fcntlFunc(SyscallDesc *desc, int num,
277 LiveProcess *process, ThreadContext *tc);
278
279/// Target fcntl64() handler.
280SyscallReturn fcntl64Func(SyscallDesc *desc, int num,
281 LiveProcess *process, ThreadContext *tc);
282
283/// Target setuid() handler.
284SyscallReturn setuidFunc(SyscallDesc *desc, int num,
285 LiveProcess *p, ThreadContext *tc);
286
287/// Target getpid() handler.
288SyscallReturn getpidFunc(SyscallDesc *desc, int num,
289 LiveProcess *p, ThreadContext *tc);
290
291/// Target getuid() handler.
292SyscallReturn getuidFunc(SyscallDesc *desc, int num,
293 LiveProcess *p, ThreadContext *tc);
294
295/// Target getgid() handler.
296SyscallReturn getgidFunc(SyscallDesc *desc, int num,
297 LiveProcess *p, ThreadContext *tc);
298
299/// Target getppid() handler.
300SyscallReturn getppidFunc(SyscallDesc *desc, int num,
301 LiveProcess *p, ThreadContext *tc);
302
303/// Target geteuid() handler.
304SyscallReturn geteuidFunc(SyscallDesc *desc, int num,
305 LiveProcess *p, ThreadContext *tc);
306
307/// Target getegid() handler.
308SyscallReturn getegidFunc(SyscallDesc *desc, int num,
309 LiveProcess *p, ThreadContext *tc);
310
311
312
313/// Pseudo Funcs - These functions use a different return convension,
314/// returning a second value in a register other than the normal return register
315SyscallReturn pipePseudoFunc(SyscallDesc *desc, int num,
316 LiveProcess *process, ThreadContext *tc);
317
318/// Target getpidPseudo() handler.
319SyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num,
320 LiveProcess *p, ThreadContext *tc);
321
322/// Target getuidPseudo() handler.
323SyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num,
324 LiveProcess *p, ThreadContext *tc);
325
326/// Target getgidPseudo() handler.
327SyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num,
328 LiveProcess *p, ThreadContext *tc);
329
330
331/// A readable name for 1,000,000, for converting microseconds to seconds.
332const int one_million = 1000000;
333
334/// Approximate seconds since the epoch (1/1/1970). About a billion,
335/// by my reckoning. We want to keep this a constant (not use the
336/// real-world time) to keep simulations repeatable.
337const unsigned seconds_since_epoch = 1000000000;
338
339/// Helper function to convert current elapsed time to seconds and
340/// microseconds.
341template <class T1, class T2>
342void
343getElapsedTime(T1 &sec, T2 &usec)
344{
345 int elapsed_usecs = curTick / Clock::Int::us;
346 sec = elapsed_usecs / one_million;
347 usec = elapsed_usecs % one_million;
348}
349
350//////////////////////////////////////////////////////////////////////
351//
352// The following emulation functions are generic, but need to be
353// templated to account for differences in types, constants, etc.
354//
355//////////////////////////////////////////////////////////////////////
356
357#if NO_STAT64
358 typedef struct stat hst_stat;
359 typedef struct stat hst_stat64;
360#else
361 typedef struct stat hst_stat;
362 typedef struct stat64 hst_stat64;
363#endif
364
365//// Helper function to convert a host stat buffer to a target stat
366//// buffer. Also copies the target buffer out to the simulated
367//// memory space. Used by stat(), fstat(), and lstat().
368
369template <typename target_stat, typename host_stat>
370static void
371convertStatBuf(target_stat &tgt, host_stat *host, bool fakeTTY = false)
372{
373 using namespace TheISA;
374
375 if (fakeTTY)
376 tgt->st_dev = 0xA;
377 else
378 tgt->st_dev = host->st_dev;
379 tgt->st_dev = htog(tgt->st_dev);
380 tgt->st_ino = host->st_ino;
381 tgt->st_ino = htog(tgt->st_ino);
382 tgt->st_mode = host->st_mode;
383 if (fakeTTY) {
384 // Claim to be a character device
385 tgt->st_mode &= ~S_IFMT; // Clear S_IFMT
386 tgt->st_mode |= S_IFCHR; // Set S_IFCHR
387 }
388 tgt->st_mode = htog(tgt->st_mode);
389 tgt->st_nlink = host->st_nlink;
390 tgt->st_nlink = htog(tgt->st_nlink);
391 tgt->st_uid = host->st_uid;
392 tgt->st_uid = htog(tgt->st_uid);
393 tgt->st_gid = host->st_gid;
394 tgt->st_gid = htog(tgt->st_gid);
395 if (fakeTTY)
396 tgt->st_rdev = 0x880d;
397 else
398 tgt->st_rdev = host->st_rdev;
399 tgt->st_rdev = htog(tgt->st_rdev);
400 tgt->st_size = host->st_size;
401 tgt->st_size = htog(tgt->st_size);
402 tgt->st_atimeX = host->st_atime;
403 tgt->st_atimeX = htog(tgt->st_atimeX);
404 tgt->st_mtimeX = host->st_mtime;
405 tgt->st_mtimeX = htog(tgt->st_mtimeX);
406 tgt->st_ctimeX = host->st_ctime;
407 tgt->st_ctimeX = htog(tgt->st_ctimeX);
408 // Force the block size to be 8k. This helps to ensure buffered io works
409 // consistently across different hosts.
410 tgt->st_blksize = 0x2000;
411 tgt->st_blksize = htog(tgt->st_blksize);
412 tgt->st_blocks = host->st_blocks;
413 tgt->st_blocks = htog(tgt->st_blocks);
414}
415
416// Same for stat64
417
418template <typename target_stat, typename host_stat64>
419static void
420convertStat64Buf(target_stat &tgt, host_stat64 *host, bool fakeTTY = false)
421{
422 using namespace TheISA;
423
424 convertStatBuf<target_stat, host_stat64>(tgt, host, fakeTTY);
425#if defined(STAT_HAVE_NSEC)
426 tgt->st_atime_nsec = host->st_atime_nsec;
427 tgt->st_atime_nsec = htog(tgt->st_atime_nsec);
428 tgt->st_mtime_nsec = host->st_mtime_nsec;
429 tgt->st_mtime_nsec = htog(tgt->st_mtime_nsec);
430 tgt->st_ctime_nsec = host->st_ctime_nsec;
431 tgt->st_ctime_nsec = htog(tgt->st_ctime_nsec);
432#else
433 tgt->st_atime_nsec = 0;
434 tgt->st_mtime_nsec = 0;
435 tgt->st_ctime_nsec = 0;
436#endif
437}
438
439//Here are a couple convenience functions
440template<class OS>
441static void
442copyOutStatBuf(TranslatingPort * mem, Addr addr,
443 hst_stat *host, bool fakeTTY = false)
444{
445 typedef TypedBufferArg<typename OS::tgt_stat> tgt_stat_buf;
446 tgt_stat_buf tgt(addr);
447 convertStatBuf<tgt_stat_buf, hst_stat>(tgt, host, fakeTTY);
448 tgt.copyOut(mem);
449}
450
451template<class OS>
452static void
453copyOutStat64Buf(TranslatingPort * mem, Addr addr,
454 hst_stat64 *host, bool fakeTTY = false)
455{
456 typedef TypedBufferArg<typename OS::tgt_stat64> tgt_stat_buf;
457 tgt_stat_buf tgt(addr);
458 convertStatBuf<tgt_stat_buf, hst_stat64>(tgt, host, fakeTTY);
459 tgt.copyOut(mem);
460}
461
462/// Target ioctl() handler. For the most part, programs call ioctl()
463/// only to find out if their stdout is a tty, to determine whether to
464/// do line or block buffering.
465template <class OS>
466SyscallReturn
467ioctlFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
468 ThreadContext *tc)
469{
470 int fd = tc->getSyscallArg(0);
471 unsigned req = tc->getSyscallArg(1);
472
473 DPRINTF(SyscallVerbose, "ioctl(%d, 0x%x, ...)\n", fd, req);
474
475 if (fd < 0 || process->sim_fd(fd) < 0) {
476 // doesn't map to any simulator fd: not a valid target fd
477 return -EBADF;
478 }
479
480 switch (req) {
481 case OS::TIOCISATTY_:
482 case OS::TIOCGETP_:
483 case OS::TIOCSETP_:
484 case OS::TIOCSETN_:
485 case OS::TIOCSETC_:
486 case OS::TIOCGETC_:
487 case OS::TIOCGETS_:
488 case OS::TIOCGETA_:
489 return -ENOTTY;
490
491 default:
492 fatal("Unsupported ioctl call: ioctl(%d, 0x%x, ...) @ 0x%llx\n",
493 fd, req, tc->readPC());
494 }
495}
496
497/// Target open() handler.
498template <class OS>
499SyscallReturn
500openFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
501 ThreadContext *tc)
502{
503 std::string path;
504
505 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
506 return -EFAULT;
507
508 if (path == "/dev/sysdev0") {
509 // This is a memory-mapped high-resolution timer device on Alpha.
510 // We don't support it, so just punt.
511 warn("Ignoring open(%s, ...)\n", path);
512 return -ENOENT;
513 }
514
515 int tgtFlags = tc->getSyscallArg(1);
516 int mode = tc->getSyscallArg(2);
517 int hostFlags = 0;
518
519 // translate open flags
520 for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) {
521 if (tgtFlags & OS::openFlagTable[i].tgtFlag) {
522 tgtFlags &= ~OS::openFlagTable[i].tgtFlag;
523 hostFlags |= OS::openFlagTable[i].hostFlag;
524 }
525 }
526
527 // any target flags left?
528 if (tgtFlags != 0)
529 warn("Syscall: open: cannot decode flags 0x%x", tgtFlags);
530
531#ifdef __CYGWIN32__
532 hostFlags |= O_BINARY;
533#endif
534
535 // Adjust path for current working directory
536 path = process->fullPath(path);
537
538 DPRINTF(SyscallVerbose, "opening file %s\n", path.c_str());
539
|
544}
545
546
547/// Target chmod() handler.
548template <class OS>
549SyscallReturn
550chmodFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
551 ThreadContext *tc)
552{
553 std::string path;
554
555 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
556 return -EFAULT;
557
558 uint32_t mode = tc->getSyscallArg(1);
559 mode_t hostMode = 0;
560
561 // XXX translate mode flags via OS::something???
562 hostMode = mode;
563
564 // Adjust path for current working directory
565 path = process->fullPath(path);
566
567 // do the chmod
568 int result = chmod(path.c_str(), hostMode);
569 if (result < 0)
570 return -errno;
571
572 return 0;
573}
574
575
576/// Target fchmod() handler.
577template <class OS>
578SyscallReturn
579fchmodFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
580 ThreadContext *tc)
581{
582 int fd = tc->getSyscallArg(0);
583 if (fd < 0 || process->sim_fd(fd) < 0) {
584 // doesn't map to any simulator fd: not a valid target fd
585 return -EBADF;
586 }
587
588 uint32_t mode = tc->getSyscallArg(1);
589 mode_t hostMode = 0;
590
591 // XXX translate mode flags via OS::someting???
592 hostMode = mode;
593
594 // do the fchmod
595 int result = fchmod(process->sim_fd(fd), hostMode);
596 if (result < 0)
597 return -errno;
598
599 return 0;
600}
601
602
603/// Target stat() handler.
604template <class OS>
605SyscallReturn
606statFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
607 ThreadContext *tc)
608{
609 std::string path;
610
611 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
612 return -EFAULT;
613
614 // Adjust path for current working directory
615 path = process->fullPath(path);
616
617 struct stat hostBuf;
618 int result = stat(path.c_str(), &hostBuf);
619
620 if (result < 0)
621 return -errno;
622
623 copyOutStatBuf<OS>(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
624
625 return 0;
626}
627
628
629/// Target stat64() handler.
630template <class OS>
631SyscallReturn
632stat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
633 ThreadContext *tc)
634{
635 std::string path;
636
637 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
638 return -EFAULT;
639
640 // Adjust path for current working directory
641 path = process->fullPath(path);
642
643#if NO_STAT64
644 struct stat hostBuf;
645 int result = stat(path.c_str(), &hostBuf);
646#else
647 struct stat64 hostBuf;
648 int result = stat64(path.c_str(), &hostBuf);
649#endif
650
651 if (result < 0)
652 return -errno;
653
654 copyOutStat64Buf<OS>(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
655
656 return 0;
657}
658
659
660/// Target fstat64() handler.
661template <class OS>
662SyscallReturn
663fstat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
664 ThreadContext *tc)
665{
666 int fd = tc->getSyscallArg(0);
667 if (fd < 0 || process->sim_fd(fd) < 0) {
668 // doesn't map to any simulator fd: not a valid target fd
669 return -EBADF;
670 }
671
672#if NO_STAT64
673 struct stat hostBuf;
674 int result = fstat(process->sim_fd(fd), &hostBuf);
675#else
676 struct stat64 hostBuf;
677 int result = fstat64(process->sim_fd(fd), &hostBuf);
678#endif
679
680 if (result < 0)
681 return -errno;
682
683 copyOutStat64Buf<OS>(tc->getMemPort(), tc->getSyscallArg(1),
684 &hostBuf, (fd == 1));
685
686 return 0;
687}
688
689
690/// Target lstat() handler.
691template <class OS>
692SyscallReturn
693lstatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
694 ThreadContext *tc)
695{
696 std::string path;
697
698 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
699 return -EFAULT;
700
701 // Adjust path for current working directory
702 path = process->fullPath(path);
703
704 struct stat hostBuf;
705 int result = lstat(path.c_str(), &hostBuf);
706
707 if (result < 0)
708 return -errno;
709
710 copyOutStatBuf<OS>(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
711
712 return 0;
713}
714
715/// Target lstat64() handler.
716template <class OS>
717SyscallReturn
718lstat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
719 ThreadContext *tc)
720{
721 std::string path;
722
723 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
724 return -EFAULT;
725
726 // Adjust path for current working directory
727 path = process->fullPath(path);
728
729#if NO_STAT64
730 struct stat hostBuf;
731 int result = lstat(path.c_str(), &hostBuf);
732#else
733 struct stat64 hostBuf;
734 int result = lstat64(path.c_str(), &hostBuf);
735#endif
736
737 if (result < 0)
738 return -errno;
739
740 copyOutStat64Buf<OS>(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
741
742 return 0;
743}
744
745/// Target fstat() handler.
746template <class OS>
747SyscallReturn
748fstatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
749 ThreadContext *tc)
750{
751 int fd = process->sim_fd(tc->getSyscallArg(0));
752
753 DPRINTF(SyscallVerbose, "fstat(%d, ...)\n", fd);
754
755 if (fd < 0)
756 return -EBADF;
757
758 struct stat hostBuf;
759 int result = fstat(fd, &hostBuf);
760
761 if (result < 0)
762 return -errno;
763
764 copyOutStatBuf<OS>(tc->getMemPort(), tc->getSyscallArg(1),
765 &hostBuf, (fd == 1));
766
767 return 0;
768}
769
770
771/// Target statfs() handler.
772template <class OS>
773SyscallReturn
774statfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
775 ThreadContext *tc)
776{
777 std::string path;
778
779 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
780 return -EFAULT;
781
782 // Adjust path for current working directory
783 path = process->fullPath(path);
784
785 struct statfs hostBuf;
786 int result = statfs(path.c_str(), &hostBuf);
787
788 if (result < 0)
789 return -errno;
790
791 OS::copyOutStatfsBuf(tc->getMemPort(),
792 (Addr)(tc->getSyscallArg(1)), &hostBuf);
793
794 return 0;
795}
796
797
798/// Target fstatfs() handler.
799template <class OS>
800SyscallReturn
801fstatfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
802 ThreadContext *tc)
803{
804 int fd = process->sim_fd(tc->getSyscallArg(0));
805
806 if (fd < 0)
807 return -EBADF;
808
809 struct statfs hostBuf;
810 int result = fstatfs(fd, &hostBuf);
811
812 if (result < 0)
813 return -errno;
814
815 OS::copyOutStatfsBuf(tc->getMemPort(), tc->getSyscallArg(1),
816 &hostBuf);
817
818 return 0;
819}
820
821
822/// Target writev() handler.
823template <class OS>
824SyscallReturn
825writevFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
826 ThreadContext *tc)
827{
828 int fd = tc->getSyscallArg(0);
829 if (fd < 0 || process->sim_fd(fd) < 0) {
830 // doesn't map to any simulator fd: not a valid target fd
831 return -EBADF;
832 }
833
834 TranslatingPort *p = tc->getMemPort();
835 uint64_t tiov_base = tc->getSyscallArg(1);
836 size_t count = tc->getSyscallArg(2);
837 struct iovec hiov[count];
838 for (int i = 0; i < count; ++i)
839 {
840 typename OS::tgt_iovec tiov;
841
842 p->readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec),
843 (uint8_t*)&tiov, sizeof(typename OS::tgt_iovec));
844 hiov[i].iov_len = gtoh(tiov.iov_len);
845 hiov[i].iov_base = new char [hiov[i].iov_len];
846 p->readBlob(gtoh(tiov.iov_base), (uint8_t *)hiov[i].iov_base,
847 hiov[i].iov_len);
848 }
849
850 int result = writev(process->sim_fd(fd), hiov, count);
851
852 for (int i = 0; i < count; ++i)
853 {
854 delete [] (char *)hiov[i].iov_base;
855 }
856
857 if (result < 0)
858 return -errno;
859
860 return 0;
861}
862
863
864/// Target mmap() handler.
865///
866/// We don't really handle mmap(). If the target is mmaping an
867/// anonymous region or /dev/zero, we can get away with doing basically
868/// nothing (since memory is initialized to zero and the simulator
869/// doesn't really check addresses anyway). Always print a warning,
870/// since this could be seriously broken if we're not mapping
871/// /dev/zero.
872//
873/// Someday we should explicitly check for /dev/zero in open, flag the
874/// file descriptor, and fail (or implement!) a non-anonymous mmap to
875/// anything else.
876template <class OS>
877SyscallReturn
878mmapFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
879{
880 Addr start = tc->getSyscallArg(0);
881 uint64_t length = tc->getSyscallArg(1);
882 // int prot = tc->getSyscallArg(2);
883 int flags = tc->getSyscallArg(3);
884 // int fd = p->sim_fd(tc->getSyscallArg(4));
885 // int offset = tc->getSyscallArg(5);
886
887 if ((start % TheISA::VMPageSize) != 0 ||
888 (length % TheISA::VMPageSize) != 0) {
889 warn("mmap failing: arguments not page-aligned: "
890 "start 0x%x length 0x%x",
891 start, length);
892 return -EINVAL;
893 }
894
895 if (start != 0) {
896 warn("mmap: ignoring suggested map address 0x%x, using 0x%x",
897 start, p->mmap_end);
898 }
899
900 // pick next address from our "mmap region"
901 start = p->mmap_end;
902 p->pTable->allocate(start, length);
903 p->mmap_end += length;
904
905 if (!(flags & OS::TGT_MAP_ANONYMOUS)) {
906 warn("allowing mmap of file @ fd %d. "
907 "This will break if not /dev/zero.", tc->getSyscallArg(4));
908 }
909
910 return start;
911}
912
913/// Target getrlimit() handler.
914template <class OS>
915SyscallReturn
916getrlimitFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
917 ThreadContext *tc)
918{
919 unsigned resource = tc->getSyscallArg(0);
920 TypedBufferArg<typename OS::rlimit> rlp(tc->getSyscallArg(1));
921
922 switch (resource) {
923 case OS::TGT_RLIMIT_STACK:
924 // max stack size in bytes: make up a number (2MB for now)
925 rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024;
926 rlp->rlim_cur = htog(rlp->rlim_cur);
927 rlp->rlim_max = htog(rlp->rlim_max);
928 break;
929
930 default:
931 std::cerr << "getrlimitFunc: unimplemented resource " << resource
932 << std::endl;
933 abort();
934 break;
935 }
936
937 rlp.copyOut(tc->getMemPort());
938 return 0;
939}
940
941/// Target gettimeofday() handler.
942template <class OS>
943SyscallReturn
944gettimeofdayFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
945 ThreadContext *tc)
946{
947 TypedBufferArg<typename OS::timeval> tp(tc->getSyscallArg(0));
948
949 getElapsedTime(tp->tv_sec, tp->tv_usec);
950 tp->tv_sec += seconds_since_epoch;
951 tp->tv_sec = htog(tp->tv_sec);
952 tp->tv_usec = htog(tp->tv_usec);
953
954 tp.copyOut(tc->getMemPort());
955
956 return 0;
957}
958
959
960/// Target utimes() handler.
961template <class OS>
962SyscallReturn
963utimesFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
964 ThreadContext *tc)
965{
966 std::string path;
967
968 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
969 return -EFAULT;
970
971 TypedBufferArg<typename OS::timeval [2]> tp(tc->getSyscallArg(1));
972 tp.copyIn(tc->getMemPort());
973
974 struct timeval hostTimeval[2];
975 for (int i = 0; i < 2; ++i)
976 {
977 hostTimeval[i].tv_sec = gtoh((*tp)[i].tv_sec);
978 hostTimeval[i].tv_usec = gtoh((*tp)[i].tv_usec);
979 }
980
981 // Adjust path for current working directory
982 path = process->fullPath(path);
983
984 int result = utimes(path.c_str(), hostTimeval);
985
986 if (result < 0)
987 return -errno;
988
989 return 0;
990}
991/// Target getrusage() function.
992template <class OS>
993SyscallReturn
994getrusageFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
995 ThreadContext *tc)
996{
997 int who = tc->getSyscallArg(0); // THREAD, SELF, or CHILDREN
998 TypedBufferArg<typename OS::rusage> rup(tc->getSyscallArg(1));
999
1000 rup->ru_utime.tv_sec = 0;
1001 rup->ru_utime.tv_usec = 0;
1002 rup->ru_stime.tv_sec = 0;
1003 rup->ru_stime.tv_usec = 0;
1004 rup->ru_maxrss = 0;
1005 rup->ru_ixrss = 0;
1006 rup->ru_idrss = 0;
1007 rup->ru_isrss = 0;
1008 rup->ru_minflt = 0;
1009 rup->ru_majflt = 0;
1010 rup->ru_nswap = 0;
1011 rup->ru_inblock = 0;
1012 rup->ru_oublock = 0;
1013 rup->ru_msgsnd = 0;
1014 rup->ru_msgrcv = 0;
1015 rup->ru_nsignals = 0;
1016 rup->ru_nvcsw = 0;
1017 rup->ru_nivcsw = 0;
1018
1019 switch (who) {
1020 case OS::TGT_RUSAGE_SELF:
1021 getElapsedTime(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec);
1022 rup->ru_utime.tv_sec = htog(rup->ru_utime.tv_sec);
1023 rup->ru_utime.tv_usec = htog(rup->ru_utime.tv_usec);
1024 break;
1025
1026 case OS::TGT_RUSAGE_CHILDREN:
1027 // do nothing. We have no child processes, so they take no time.
1028 break;
1029
1030 default:
1031 // don't really handle THREAD or CHILDREN, but just warn and
1032 // plow ahead
1033 warn("getrusage() only supports RUSAGE_SELF. Parameter %d ignored.",
1034 who);
1035 }
1036
1037 rup.copyOut(tc->getMemPort());
1038
1039 return 0;
1040}
1041
1042
1043
1044
1045#endif // __SIM_SYSCALL_EMUL_HH__
| 552}
553
554
555/// Target chmod() handler.
556template <class OS>
557SyscallReturn
558chmodFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
559 ThreadContext *tc)
560{
561 std::string path;
562
563 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
564 return -EFAULT;
565
566 uint32_t mode = tc->getSyscallArg(1);
567 mode_t hostMode = 0;
568
569 // XXX translate mode flags via OS::something???
570 hostMode = mode;
571
572 // Adjust path for current working directory
573 path = process->fullPath(path);
574
575 // do the chmod
576 int result = chmod(path.c_str(), hostMode);
577 if (result < 0)
578 return -errno;
579
580 return 0;
581}
582
583
584/// Target fchmod() handler.
585template <class OS>
586SyscallReturn
587fchmodFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
588 ThreadContext *tc)
589{
590 int fd = tc->getSyscallArg(0);
591 if (fd < 0 || process->sim_fd(fd) < 0) {
592 // doesn't map to any simulator fd: not a valid target fd
593 return -EBADF;
594 }
595
596 uint32_t mode = tc->getSyscallArg(1);
597 mode_t hostMode = 0;
598
599 // XXX translate mode flags via OS::someting???
600 hostMode = mode;
601
602 // do the fchmod
603 int result = fchmod(process->sim_fd(fd), hostMode);
604 if (result < 0)
605 return -errno;
606
607 return 0;
608}
609
610
611/// Target stat() handler.
612template <class OS>
613SyscallReturn
614statFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
615 ThreadContext *tc)
616{
617 std::string path;
618
619 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
620 return -EFAULT;
621
622 // Adjust path for current working directory
623 path = process->fullPath(path);
624
625 struct stat hostBuf;
626 int result = stat(path.c_str(), &hostBuf);
627
628 if (result < 0)
629 return -errno;
630
631 copyOutStatBuf<OS>(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
632
633 return 0;
634}
635
636
637/// Target stat64() handler.
638template <class OS>
639SyscallReturn
640stat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
641 ThreadContext *tc)
642{
643 std::string path;
644
645 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
646 return -EFAULT;
647
648 // Adjust path for current working directory
649 path = process->fullPath(path);
650
651#if NO_STAT64
652 struct stat hostBuf;
653 int result = stat(path.c_str(), &hostBuf);
654#else
655 struct stat64 hostBuf;
656 int result = stat64(path.c_str(), &hostBuf);
657#endif
658
659 if (result < 0)
660 return -errno;
661
662 copyOutStat64Buf<OS>(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
663
664 return 0;
665}
666
667
668/// Target fstat64() handler.
669template <class OS>
670SyscallReturn
671fstat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
672 ThreadContext *tc)
673{
674 int fd = tc->getSyscallArg(0);
675 if (fd < 0 || process->sim_fd(fd) < 0) {
676 // doesn't map to any simulator fd: not a valid target fd
677 return -EBADF;
678 }
679
680#if NO_STAT64
681 struct stat hostBuf;
682 int result = fstat(process->sim_fd(fd), &hostBuf);
683#else
684 struct stat64 hostBuf;
685 int result = fstat64(process->sim_fd(fd), &hostBuf);
686#endif
687
688 if (result < 0)
689 return -errno;
690
691 copyOutStat64Buf<OS>(tc->getMemPort(), tc->getSyscallArg(1),
692 &hostBuf, (fd == 1));
693
694 return 0;
695}
696
697
698/// Target lstat() handler.
699template <class OS>
700SyscallReturn
701lstatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
702 ThreadContext *tc)
703{
704 std::string path;
705
706 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
707 return -EFAULT;
708
709 // Adjust path for current working directory
710 path = process->fullPath(path);
711
712 struct stat hostBuf;
713 int result = lstat(path.c_str(), &hostBuf);
714
715 if (result < 0)
716 return -errno;
717
718 copyOutStatBuf<OS>(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
719
720 return 0;
721}
722
723/// Target lstat64() handler.
724template <class OS>
725SyscallReturn
726lstat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
727 ThreadContext *tc)
728{
729 std::string path;
730
731 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
732 return -EFAULT;
733
734 // Adjust path for current working directory
735 path = process->fullPath(path);
736
737#if NO_STAT64
738 struct stat hostBuf;
739 int result = lstat(path.c_str(), &hostBuf);
740#else
741 struct stat64 hostBuf;
742 int result = lstat64(path.c_str(), &hostBuf);
743#endif
744
745 if (result < 0)
746 return -errno;
747
748 copyOutStat64Buf<OS>(tc->getMemPort(), tc->getSyscallArg(1), &hostBuf);
749
750 return 0;
751}
752
753/// Target fstat() handler.
754template <class OS>
755SyscallReturn
756fstatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
757 ThreadContext *tc)
758{
759 int fd = process->sim_fd(tc->getSyscallArg(0));
760
761 DPRINTF(SyscallVerbose, "fstat(%d, ...)\n", fd);
762
763 if (fd < 0)
764 return -EBADF;
765
766 struct stat hostBuf;
767 int result = fstat(fd, &hostBuf);
768
769 if (result < 0)
770 return -errno;
771
772 copyOutStatBuf<OS>(tc->getMemPort(), tc->getSyscallArg(1),
773 &hostBuf, (fd == 1));
774
775 return 0;
776}
777
778
779/// Target statfs() handler.
780template <class OS>
781SyscallReturn
782statfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
783 ThreadContext *tc)
784{
785 std::string path;
786
787 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
788 return -EFAULT;
789
790 // Adjust path for current working directory
791 path = process->fullPath(path);
792
793 struct statfs hostBuf;
794 int result = statfs(path.c_str(), &hostBuf);
795
796 if (result < 0)
797 return -errno;
798
799 OS::copyOutStatfsBuf(tc->getMemPort(),
800 (Addr)(tc->getSyscallArg(1)), &hostBuf);
801
802 return 0;
803}
804
805
806/// Target fstatfs() handler.
807template <class OS>
808SyscallReturn
809fstatfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
810 ThreadContext *tc)
811{
812 int fd = process->sim_fd(tc->getSyscallArg(0));
813
814 if (fd < 0)
815 return -EBADF;
816
817 struct statfs hostBuf;
818 int result = fstatfs(fd, &hostBuf);
819
820 if (result < 0)
821 return -errno;
822
823 OS::copyOutStatfsBuf(tc->getMemPort(), tc->getSyscallArg(1),
824 &hostBuf);
825
826 return 0;
827}
828
829
830/// Target writev() handler.
831template <class OS>
832SyscallReturn
833writevFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
834 ThreadContext *tc)
835{
836 int fd = tc->getSyscallArg(0);
837 if (fd < 0 || process->sim_fd(fd) < 0) {
838 // doesn't map to any simulator fd: not a valid target fd
839 return -EBADF;
840 }
841
842 TranslatingPort *p = tc->getMemPort();
843 uint64_t tiov_base = tc->getSyscallArg(1);
844 size_t count = tc->getSyscallArg(2);
845 struct iovec hiov[count];
846 for (int i = 0; i < count; ++i)
847 {
848 typename OS::tgt_iovec tiov;
849
850 p->readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec),
851 (uint8_t*)&tiov, sizeof(typename OS::tgt_iovec));
852 hiov[i].iov_len = gtoh(tiov.iov_len);
853 hiov[i].iov_base = new char [hiov[i].iov_len];
854 p->readBlob(gtoh(tiov.iov_base), (uint8_t *)hiov[i].iov_base,
855 hiov[i].iov_len);
856 }
857
858 int result = writev(process->sim_fd(fd), hiov, count);
859
860 for (int i = 0; i < count; ++i)
861 {
862 delete [] (char *)hiov[i].iov_base;
863 }
864
865 if (result < 0)
866 return -errno;
867
868 return 0;
869}
870
871
872/// Target mmap() handler.
873///
874/// We don't really handle mmap(). If the target is mmaping an
875/// anonymous region or /dev/zero, we can get away with doing basically
876/// nothing (since memory is initialized to zero and the simulator
877/// doesn't really check addresses anyway). Always print a warning,
878/// since this could be seriously broken if we're not mapping
879/// /dev/zero.
880//
881/// Someday we should explicitly check for /dev/zero in open, flag the
882/// file descriptor, and fail (or implement!) a non-anonymous mmap to
883/// anything else.
884template <class OS>
885SyscallReturn
886mmapFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
887{
888 Addr start = tc->getSyscallArg(0);
889 uint64_t length = tc->getSyscallArg(1);
890 // int prot = tc->getSyscallArg(2);
891 int flags = tc->getSyscallArg(3);
892 // int fd = p->sim_fd(tc->getSyscallArg(4));
893 // int offset = tc->getSyscallArg(5);
894
895 if ((start % TheISA::VMPageSize) != 0 ||
896 (length % TheISA::VMPageSize) != 0) {
897 warn("mmap failing: arguments not page-aligned: "
898 "start 0x%x length 0x%x",
899 start, length);
900 return -EINVAL;
901 }
902
903 if (start != 0) {
904 warn("mmap: ignoring suggested map address 0x%x, using 0x%x",
905 start, p->mmap_end);
906 }
907
908 // pick next address from our "mmap region"
909 start = p->mmap_end;
910 p->pTable->allocate(start, length);
911 p->mmap_end += length;
912
913 if (!(flags & OS::TGT_MAP_ANONYMOUS)) {
914 warn("allowing mmap of file @ fd %d. "
915 "This will break if not /dev/zero.", tc->getSyscallArg(4));
916 }
917
918 return start;
919}
920
921/// Target getrlimit() handler.
922template <class OS>
923SyscallReturn
924getrlimitFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
925 ThreadContext *tc)
926{
927 unsigned resource = tc->getSyscallArg(0);
928 TypedBufferArg<typename OS::rlimit> rlp(tc->getSyscallArg(1));
929
930 switch (resource) {
931 case OS::TGT_RLIMIT_STACK:
932 // max stack size in bytes: make up a number (2MB for now)
933 rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024;
934 rlp->rlim_cur = htog(rlp->rlim_cur);
935 rlp->rlim_max = htog(rlp->rlim_max);
936 break;
937
938 default:
939 std::cerr << "getrlimitFunc: unimplemented resource " << resource
940 << std::endl;
941 abort();
942 break;
943 }
944
945 rlp.copyOut(tc->getMemPort());
946 return 0;
947}
948
949/// Target gettimeofday() handler.
950template <class OS>
951SyscallReturn
952gettimeofdayFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
953 ThreadContext *tc)
954{
955 TypedBufferArg<typename OS::timeval> tp(tc->getSyscallArg(0));
956
957 getElapsedTime(tp->tv_sec, tp->tv_usec);
958 tp->tv_sec += seconds_since_epoch;
959 tp->tv_sec = htog(tp->tv_sec);
960 tp->tv_usec = htog(tp->tv_usec);
961
962 tp.copyOut(tc->getMemPort());
963
964 return 0;
965}
966
967
968/// Target utimes() handler.
969template <class OS>
970SyscallReturn
971utimesFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
972 ThreadContext *tc)
973{
974 std::string path;
975
976 if (!tc->getMemPort()->tryReadString(path, tc->getSyscallArg(0)))
977 return -EFAULT;
978
979 TypedBufferArg<typename OS::timeval [2]> tp(tc->getSyscallArg(1));
980 tp.copyIn(tc->getMemPort());
981
982 struct timeval hostTimeval[2];
983 for (int i = 0; i < 2; ++i)
984 {
985 hostTimeval[i].tv_sec = gtoh((*tp)[i].tv_sec);
986 hostTimeval[i].tv_usec = gtoh((*tp)[i].tv_usec);
987 }
988
989 // Adjust path for current working directory
990 path = process->fullPath(path);
991
992 int result = utimes(path.c_str(), hostTimeval);
993
994 if (result < 0)
995 return -errno;
996
997 return 0;
998}
999/// Target getrusage() function.
1000template <class OS>
1001SyscallReturn
1002getrusageFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1003 ThreadContext *tc)
1004{
1005 int who = tc->getSyscallArg(0); // THREAD, SELF, or CHILDREN
1006 TypedBufferArg<typename OS::rusage> rup(tc->getSyscallArg(1));
1007
1008 rup->ru_utime.tv_sec = 0;
1009 rup->ru_utime.tv_usec = 0;
1010 rup->ru_stime.tv_sec = 0;
1011 rup->ru_stime.tv_usec = 0;
1012 rup->ru_maxrss = 0;
1013 rup->ru_ixrss = 0;
1014 rup->ru_idrss = 0;
1015 rup->ru_isrss = 0;
1016 rup->ru_minflt = 0;
1017 rup->ru_majflt = 0;
1018 rup->ru_nswap = 0;
1019 rup->ru_inblock = 0;
1020 rup->ru_oublock = 0;
1021 rup->ru_msgsnd = 0;
1022 rup->ru_msgrcv = 0;
1023 rup->ru_nsignals = 0;
1024 rup->ru_nvcsw = 0;
1025 rup->ru_nivcsw = 0;
1026
1027 switch (who) {
1028 case OS::TGT_RUSAGE_SELF:
1029 getElapsedTime(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec);
1030 rup->ru_utime.tv_sec = htog(rup->ru_utime.tv_sec);
1031 rup->ru_utime.tv_usec = htog(rup->ru_utime.tv_usec);
1032 break;
1033
1034 case OS::TGT_RUSAGE_CHILDREN:
1035 // do nothing. We have no child processes, so they take no time.
1036 break;
1037
1038 default:
1039 // don't really handle THREAD or CHILDREN, but just warn and
1040 // plow ahead
1041 warn("getrusage() only supports RUSAGE_SELF. Parameter %d ignored.",
1042 who);
1043 }
1044
1045 rup.copyOut(tc->getMemPort());
1046
1047 return 0;
1048}
1049
1050
1051
1052
1053#endif // __SIM_SYSCALL_EMUL_HH__
|