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 "base/chunk_generator.hh"
54#include "base/intmath.hh" // for RoundUp
55#include "base/misc.hh"
56#include "base/trace.hh"
57#include "base/types.hh"
58#include "config/the_isa.hh"
59#include "cpu/base.hh"
60#include "cpu/thread_context.hh"
61#include "mem/translating_port.hh"
62#include "mem/page_table.hh"
63#include "sim/system.hh"
64#include "sim/process.hh"
65
66///
67/// System call descriptor.
68///
69class SyscallDesc {
70
71 public:
72
73 /// Typedef for target syscall handler functions.
74 typedef SyscallReturn (*FuncPtr)(SyscallDesc *, int num,
75 LiveProcess *, ThreadContext *);
76
77 const char *name; //!< Syscall name (e.g., "open").
78 FuncPtr funcPtr; //!< Pointer to emulation function.
79 int flags; //!< Flags (see Flags enum).
80
81 /// Flag values for controlling syscall behavior.
82 enum Flags {
83 /// Don't set return regs according to funcPtr return value.
84 /// Used for syscalls with non-standard return conventions
85 /// that explicitly set the ThreadContext regs (e.g.,
86 /// sigreturn).
87 SuppressReturnValue = 1
88 };
89
90 /// Constructor.
91 SyscallDesc(const char *_name, FuncPtr _funcPtr, int _flags = 0)
92 : name(_name), funcPtr(_funcPtr), flags(_flags)
93 {
94 }
95
96 /// Emulate the syscall. Public interface for calling through funcPtr.
97 void doSyscall(int callnum, LiveProcess *proc, ThreadContext *tc);
98};
99
100
101class BaseBufferArg {
102
103 public:
104
105 BaseBufferArg(Addr _addr, int _size) : addr(_addr), size(_size)
106 {
107 bufPtr = new uint8_t[size];
108 // clear out buffer: in case we only partially populate this,
109 // and then do a copyOut(), we want to make sure we don't
110 // introduce any random junk into the simulated address space
111 memset(bufPtr, 0, size);
112 }
113
114 virtual ~BaseBufferArg() { delete [] bufPtr; }
115
116 //
117 // copy data into simulator space (read from target memory)
118 //
119 virtual bool copyIn(TranslatingPort *memport)
120 {
121 memport->readBlob(addr, bufPtr, size);
122 return true; // no EFAULT detection for now
123 }
124
125 //
126 // copy data out of simulator space (write to target memory)
127 //
128 virtual bool copyOut(TranslatingPort *memport)
129 {
130 memport->writeBlob(addr, bufPtr, size);
131 return true; // no EFAULT detection for now
132 }
133
134 protected:
135 Addr addr;
136 int size;
137 uint8_t *bufPtr;
138};
139
140
141class BufferArg : public BaseBufferArg
142{
143 public:
144 BufferArg(Addr _addr, int _size) : BaseBufferArg(_addr, _size) { }
145 void *bufferPtr() { return bufPtr; }
146};
147
148template <class T>
149class TypedBufferArg : public BaseBufferArg
150{
151 public:
152 // user can optionally specify a specific number of bytes to
153 // allocate to deal with those structs that have variable-size
154 // arrays at the end
155 TypedBufferArg(Addr _addr, int _size = sizeof(T))
156 : BaseBufferArg(_addr, _size)
157 { }
158
159 // type case
160 operator T*() { return (T *)bufPtr; }
161
162 // dereference operators
163 T &operator*() { return *((T *)bufPtr); }
164 T* operator->() { return (T *)bufPtr; }
165 T &operator[](int i) { return ((T *)bufPtr)[i]; }
166};
167
168//////////////////////////////////////////////////////////////////////
169//
170// The following emulation functions are generic enough that they
171// don't need to be recompiled for different emulated OS's. They are
172// defined in sim/syscall_emul.cc.
173//
174//////////////////////////////////////////////////////////////////////
175
176
177/// Handler for unimplemented syscalls that we haven't thought about.
178SyscallReturn unimplementedFunc(SyscallDesc *desc, int num,
179 LiveProcess *p, ThreadContext *tc);
180
181/// Handler for unimplemented syscalls that we never intend to
182/// implement (signal handling, etc.) and should not affect the correct
183/// behavior of the program. Print a warning only if the appropriate
184/// trace flag is enabled. Return success to the target program.
185SyscallReturn ignoreFunc(SyscallDesc *desc, int num,
186 LiveProcess *p, ThreadContext *tc);
187
188/// Target exit() handler: terminate current context.
189SyscallReturn exitFunc(SyscallDesc *desc, int num,
190 LiveProcess *p, ThreadContext *tc);
191
192/// Target exit_group() handler: terminate simulation. (exit all threads)
193SyscallReturn exitGroupFunc(SyscallDesc *desc, int num,
194 LiveProcess *p, ThreadContext *tc);
195
196/// Target getpagesize() handler.
197SyscallReturn getpagesizeFunc(SyscallDesc *desc, int num,
198 LiveProcess *p, ThreadContext *tc);
199
200/// Target brk() handler: set brk address.
201SyscallReturn brkFunc(SyscallDesc *desc, int num,
202 LiveProcess *p, ThreadContext *tc);
203
204/// Target close() handler.
205SyscallReturn closeFunc(SyscallDesc *desc, int num,
206 LiveProcess *p, ThreadContext *tc);
207
208/// Target read() handler.
209SyscallReturn readFunc(SyscallDesc *desc, int num,
210 LiveProcess *p, ThreadContext *tc);
211
212/// Target write() handler.
213SyscallReturn writeFunc(SyscallDesc *desc, int num,
214 LiveProcess *p, ThreadContext *tc);
215
216/// Target lseek() handler.
217SyscallReturn lseekFunc(SyscallDesc *desc, int num,
218 LiveProcess *p, ThreadContext *tc);
219
220/// Target _llseek() handler.
221SyscallReturn _llseekFunc(SyscallDesc *desc, int num,
222 LiveProcess *p, ThreadContext *tc);
223
224/// Target munmap() handler.
225SyscallReturn munmapFunc(SyscallDesc *desc, int num,
226 LiveProcess *p, ThreadContext *tc);
227
228/// Target gethostname() handler.
229SyscallReturn gethostnameFunc(SyscallDesc *desc, int num,
230 LiveProcess *p, ThreadContext *tc);
231
232/// Target getcwd() handler.
233SyscallReturn getcwdFunc(SyscallDesc *desc, int num,
234 LiveProcess *p, ThreadContext *tc);
235
236/// Target unlink() handler.
237SyscallReturn readlinkFunc(SyscallDesc *desc, int num,
238 LiveProcess *p, ThreadContext *tc);
239
240/// Target unlink() handler.
241SyscallReturn unlinkFunc(SyscallDesc *desc, int num,
242 LiveProcess *p, ThreadContext *tc);
243
244/// Target mkdir() handler.
245SyscallReturn mkdirFunc(SyscallDesc *desc, int num,
246 LiveProcess *p, ThreadContext *tc);
247
248/// Target rename() handler.
249SyscallReturn renameFunc(SyscallDesc *desc, int num,
250 LiveProcess *p, ThreadContext *tc);
251
252
253/// Target truncate() handler.
254SyscallReturn truncateFunc(SyscallDesc *desc, int num,
255 LiveProcess *p, ThreadContext *tc);
256
257
258/// Target ftruncate() handler.
259SyscallReturn ftruncateFunc(SyscallDesc *desc, int num,
260 LiveProcess *p, ThreadContext *tc);
261
262
263/// Target ftruncate64() handler.
264SyscallReturn ftruncate64Func(SyscallDesc *desc, int num,
265 LiveProcess *p, ThreadContext *tc);
266
267
268/// Target umask() handler.
269SyscallReturn umaskFunc(SyscallDesc *desc, int num,
270 LiveProcess *p, ThreadContext *tc);
271
272
273/// Target chown() handler.
274SyscallReturn chownFunc(SyscallDesc *desc, int num,
275 LiveProcess *p, ThreadContext *tc);
276
277
278/// Target fchown() handler.
279SyscallReturn fchownFunc(SyscallDesc *desc, int num,
280 LiveProcess *p, ThreadContext *tc);
281
282/// Target dup() handler.
283SyscallReturn dupFunc(SyscallDesc *desc, int num,
284 LiveProcess *process, ThreadContext *tc);
285
286/// Target fnctl() handler.
287SyscallReturn fcntlFunc(SyscallDesc *desc, int num,
288 LiveProcess *process, ThreadContext *tc);
289
290/// Target fcntl64() handler.
291SyscallReturn fcntl64Func(SyscallDesc *desc, int num,
292 LiveProcess *process, ThreadContext *tc);
293
294/// Target setuid() handler.
295SyscallReturn setuidFunc(SyscallDesc *desc, int num,
296 LiveProcess *p, ThreadContext *tc);
297
298/// Target getpid() handler.
299SyscallReturn getpidFunc(SyscallDesc *desc, int num,
300 LiveProcess *p, ThreadContext *tc);
301
302/// Target getuid() handler.
303SyscallReturn getuidFunc(SyscallDesc *desc, int num,
304 LiveProcess *p, ThreadContext *tc);
305
306/// Target getgid() handler.
307SyscallReturn getgidFunc(SyscallDesc *desc, int num,
308 LiveProcess *p, ThreadContext *tc);
309
310/// Target getppid() handler.
311SyscallReturn getppidFunc(SyscallDesc *desc, int num,
312 LiveProcess *p, ThreadContext *tc);
313
314/// Target geteuid() handler.
315SyscallReturn geteuidFunc(SyscallDesc *desc, int num,
316 LiveProcess *p, ThreadContext *tc);
317
318/// Target getegid() handler.
319SyscallReturn getegidFunc(SyscallDesc *desc, int num,
320 LiveProcess *p, ThreadContext *tc);
321
322/// Target clone() handler.
323SyscallReturn cloneFunc(SyscallDesc *desc, int num,
324 LiveProcess *p, ThreadContext *tc);
325
326
327/// Pseudo Funcs - These functions use a different return convension,
328/// returning a second value in a register other than the normal return register
329SyscallReturn pipePseudoFunc(SyscallDesc *desc, int num,
330 LiveProcess *process, ThreadContext *tc);
331
332/// Target getpidPseudo() handler.
333SyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num,
334 LiveProcess *p, ThreadContext *tc);
335
336/// Target getuidPseudo() handler.
337SyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num,
338 LiveProcess *p, ThreadContext *tc);
339
340/// Target getgidPseudo() handler.
341SyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num,
342 LiveProcess *p, ThreadContext *tc);
343
344
345/// A readable name for 1,000,000, for converting microseconds to seconds.
346const int one_million = 1000000;
347
348/// Approximate seconds since the epoch (1/1/1970). About a billion,
349/// by my reckoning. We want to keep this a constant (not use the
350/// real-world time) to keep simulations repeatable.
351const unsigned seconds_since_epoch = 1000000000;
352
353/// Helper function to convert current elapsed time to seconds and
354/// microseconds.
355template <class T1, class T2>
356void
357getElapsedTime(T1 &sec, T2 &usec)
358{
359 int elapsed_usecs = curTick / Clock::Int::us;
360 sec = elapsed_usecs / one_million;
361 usec = elapsed_usecs % one_million;
362}
363
364//////////////////////////////////////////////////////////////////////
365//
366// The following emulation functions are generic, but need to be
367// templated to account for differences in types, constants, etc.
368//
369//////////////////////////////////////////////////////////////////////
370
371#if NO_STAT64
372 typedef struct stat hst_stat;
373 typedef struct stat hst_stat64;
374#else
375 typedef struct stat hst_stat;
376 typedef struct stat64 hst_stat64;
377#endif
378
379//// Helper function to convert a host stat buffer to a target stat
380//// buffer. Also copies the target buffer out to the simulated
381//// memory space. Used by stat(), fstat(), and lstat().
382
383template <typename target_stat, typename host_stat>
384static void
385convertStatBuf(target_stat &tgt, host_stat *host, bool fakeTTY = false)
386{
387 using namespace TheISA;
388
389 if (fakeTTY)
390 tgt->st_dev = 0xA;
391 else
392 tgt->st_dev = host->st_dev;
393 tgt->st_dev = htog(tgt->st_dev);
394 tgt->st_ino = host->st_ino;
395 tgt->st_ino = htog(tgt->st_ino);
396 tgt->st_mode = host->st_mode;
397 if (fakeTTY) {
398 // Claim to be a character device
399 tgt->st_mode &= ~S_IFMT; // Clear S_IFMT
400 tgt->st_mode |= S_IFCHR; // Set S_IFCHR
401 }
402 tgt->st_mode = htog(tgt->st_mode);
403 tgt->st_nlink = host->st_nlink;
404 tgt->st_nlink = htog(tgt->st_nlink);
405 tgt->st_uid = host->st_uid;
406 tgt->st_uid = htog(tgt->st_uid);
407 tgt->st_gid = host->st_gid;
408 tgt->st_gid = htog(tgt->st_gid);
409 if (fakeTTY)
410 tgt->st_rdev = 0x880d;
411 else
412 tgt->st_rdev = host->st_rdev;
413 tgt->st_rdev = htog(tgt->st_rdev);
414 tgt->st_size = host->st_size;
415 tgt->st_size = htog(tgt->st_size);
416 tgt->st_atimeX = host->st_atime;
417 tgt->st_atimeX = htog(tgt->st_atimeX);
418 tgt->st_mtimeX = host->st_mtime;
419 tgt->st_mtimeX = htog(tgt->st_mtimeX);
420 tgt->st_ctimeX = host->st_ctime;
421 tgt->st_ctimeX = htog(tgt->st_ctimeX);
422 // Force the block size to be 8k. This helps to ensure buffered io works
423 // consistently across different hosts.
424 tgt->st_blksize = 0x2000;
425 tgt->st_blksize = htog(tgt->st_blksize);
426 tgt->st_blocks = host->st_blocks;
427 tgt->st_blocks = htog(tgt->st_blocks);
428}
429
430// Same for stat64
431
432template <typename target_stat, typename host_stat64>
433static void
434convertStat64Buf(target_stat &tgt, host_stat64 *host, bool fakeTTY = false)
435{
436 using namespace TheISA;
437
438 convertStatBuf<target_stat, host_stat64>(tgt, host, fakeTTY);
439#if defined(STAT_HAVE_NSEC)
440 tgt->st_atime_nsec = host->st_atime_nsec;
441 tgt->st_atime_nsec = htog(tgt->st_atime_nsec);
442 tgt->st_mtime_nsec = host->st_mtime_nsec;
443 tgt->st_mtime_nsec = htog(tgt->st_mtime_nsec);
444 tgt->st_ctime_nsec = host->st_ctime_nsec;
445 tgt->st_ctime_nsec = htog(tgt->st_ctime_nsec);
446#else
447 tgt->st_atime_nsec = 0;
448 tgt->st_mtime_nsec = 0;
449 tgt->st_ctime_nsec = 0;
450#endif
451}
452
453//Here are a couple convenience functions
454template<class OS>
455static void
456copyOutStatBuf(TranslatingPort * mem, Addr addr,
457 hst_stat *host, bool fakeTTY = false)
458{
459 typedef TypedBufferArg<typename OS::tgt_stat> tgt_stat_buf;
460 tgt_stat_buf tgt(addr);
461 convertStatBuf<tgt_stat_buf, hst_stat>(tgt, host, fakeTTY);
462 tgt.copyOut(mem);
463}
464
465template<class OS>
466static void
467copyOutStat64Buf(TranslatingPort * mem, Addr addr,
468 hst_stat64 *host, bool fakeTTY = false)
469{
470 typedef TypedBufferArg<typename OS::tgt_stat64> tgt_stat_buf;
471 tgt_stat_buf tgt(addr);
472 convertStat64Buf<tgt_stat_buf, hst_stat64>(tgt, host, fakeTTY);
473 tgt.copyOut(mem);
474}
475
476/// Target ioctl() handler. For the most part, programs call ioctl()
477/// only to find out if their stdout is a tty, to determine whether to
478/// do line or block buffering.
479template <class OS>
480SyscallReturn
481ioctlFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
482 ThreadContext *tc)
483{
484 int fd = process->getSyscallArg(tc, 0);
485 unsigned req = process->getSyscallArg(tc, 1);
486
487 DPRINTF(SyscallVerbose, "ioctl(%d, 0x%x, ...)\n", fd, req);
488
489 if (fd < 0 || process->sim_fd(fd) < 0) {
490 // doesn't map to any simulator fd: not a valid target fd
491 return -EBADF;
492 }
493
494 switch (req) {
495 case OS::TIOCISATTY_:
496 case OS::TIOCGETP_:
497 case OS::TIOCSETP_:
498 case OS::TIOCSETN_:
499 case OS::TIOCSETC_:
500 case OS::TIOCGETC_:
501 case OS::TIOCGETS_:
502 case OS::TIOCGETA_:
| 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 "base/chunk_generator.hh"
54#include "base/intmath.hh" // for RoundUp
55#include "base/misc.hh"
56#include "base/trace.hh"
57#include "base/types.hh"
58#include "config/the_isa.hh"
59#include "cpu/base.hh"
60#include "cpu/thread_context.hh"
61#include "mem/translating_port.hh"
62#include "mem/page_table.hh"
63#include "sim/system.hh"
64#include "sim/process.hh"
65
66///
67/// System call descriptor.
68///
69class SyscallDesc {
70
71 public:
72
73 /// Typedef for target syscall handler functions.
74 typedef SyscallReturn (*FuncPtr)(SyscallDesc *, int num,
75 LiveProcess *, ThreadContext *);
76
77 const char *name; //!< Syscall name (e.g., "open").
78 FuncPtr funcPtr; //!< Pointer to emulation function.
79 int flags; //!< Flags (see Flags enum).
80
81 /// Flag values for controlling syscall behavior.
82 enum Flags {
83 /// Don't set return regs according to funcPtr return value.
84 /// Used for syscalls with non-standard return conventions
85 /// that explicitly set the ThreadContext regs (e.g.,
86 /// sigreturn).
87 SuppressReturnValue = 1
88 };
89
90 /// Constructor.
91 SyscallDesc(const char *_name, FuncPtr _funcPtr, int _flags = 0)
92 : name(_name), funcPtr(_funcPtr), flags(_flags)
93 {
94 }
95
96 /// Emulate the syscall. Public interface for calling through funcPtr.
97 void doSyscall(int callnum, LiveProcess *proc, ThreadContext *tc);
98};
99
100
101class BaseBufferArg {
102
103 public:
104
105 BaseBufferArg(Addr _addr, int _size) : addr(_addr), size(_size)
106 {
107 bufPtr = new uint8_t[size];
108 // clear out buffer: in case we only partially populate this,
109 // and then do a copyOut(), we want to make sure we don't
110 // introduce any random junk into the simulated address space
111 memset(bufPtr, 0, size);
112 }
113
114 virtual ~BaseBufferArg() { delete [] bufPtr; }
115
116 //
117 // copy data into simulator space (read from target memory)
118 //
119 virtual bool copyIn(TranslatingPort *memport)
120 {
121 memport->readBlob(addr, bufPtr, size);
122 return true; // no EFAULT detection for now
123 }
124
125 //
126 // copy data out of simulator space (write to target memory)
127 //
128 virtual bool copyOut(TranslatingPort *memport)
129 {
130 memport->writeBlob(addr, bufPtr, size);
131 return true; // no EFAULT detection for now
132 }
133
134 protected:
135 Addr addr;
136 int size;
137 uint8_t *bufPtr;
138};
139
140
141class BufferArg : public BaseBufferArg
142{
143 public:
144 BufferArg(Addr _addr, int _size) : BaseBufferArg(_addr, _size) { }
145 void *bufferPtr() { return bufPtr; }
146};
147
148template <class T>
149class TypedBufferArg : public BaseBufferArg
150{
151 public:
152 // user can optionally specify a specific number of bytes to
153 // allocate to deal with those structs that have variable-size
154 // arrays at the end
155 TypedBufferArg(Addr _addr, int _size = sizeof(T))
156 : BaseBufferArg(_addr, _size)
157 { }
158
159 // type case
160 operator T*() { return (T *)bufPtr; }
161
162 // dereference operators
163 T &operator*() { return *((T *)bufPtr); }
164 T* operator->() { return (T *)bufPtr; }
165 T &operator[](int i) { return ((T *)bufPtr)[i]; }
166};
167
168//////////////////////////////////////////////////////////////////////
169//
170// The following emulation functions are generic enough that they
171// don't need to be recompiled for different emulated OS's. They are
172// defined in sim/syscall_emul.cc.
173//
174//////////////////////////////////////////////////////////////////////
175
176
177/// Handler for unimplemented syscalls that we haven't thought about.
178SyscallReturn unimplementedFunc(SyscallDesc *desc, int num,
179 LiveProcess *p, ThreadContext *tc);
180
181/// Handler for unimplemented syscalls that we never intend to
182/// implement (signal handling, etc.) and should not affect the correct
183/// behavior of the program. Print a warning only if the appropriate
184/// trace flag is enabled. Return success to the target program.
185SyscallReturn ignoreFunc(SyscallDesc *desc, int num,
186 LiveProcess *p, ThreadContext *tc);
187
188/// Target exit() handler: terminate current context.
189SyscallReturn exitFunc(SyscallDesc *desc, int num,
190 LiveProcess *p, ThreadContext *tc);
191
192/// Target exit_group() handler: terminate simulation. (exit all threads)
193SyscallReturn exitGroupFunc(SyscallDesc *desc, int num,
194 LiveProcess *p, ThreadContext *tc);
195
196/// Target getpagesize() handler.
197SyscallReturn getpagesizeFunc(SyscallDesc *desc, int num,
198 LiveProcess *p, ThreadContext *tc);
199
200/// Target brk() handler: set brk address.
201SyscallReturn brkFunc(SyscallDesc *desc, int num,
202 LiveProcess *p, ThreadContext *tc);
203
204/// Target close() handler.
205SyscallReturn closeFunc(SyscallDesc *desc, int num,
206 LiveProcess *p, ThreadContext *tc);
207
208/// Target read() handler.
209SyscallReturn readFunc(SyscallDesc *desc, int num,
210 LiveProcess *p, ThreadContext *tc);
211
212/// Target write() handler.
213SyscallReturn writeFunc(SyscallDesc *desc, int num,
214 LiveProcess *p, ThreadContext *tc);
215
216/// Target lseek() handler.
217SyscallReturn lseekFunc(SyscallDesc *desc, int num,
218 LiveProcess *p, ThreadContext *tc);
219
220/// Target _llseek() handler.
221SyscallReturn _llseekFunc(SyscallDesc *desc, int num,
222 LiveProcess *p, ThreadContext *tc);
223
224/// Target munmap() handler.
225SyscallReturn munmapFunc(SyscallDesc *desc, int num,
226 LiveProcess *p, ThreadContext *tc);
227
228/// Target gethostname() handler.
229SyscallReturn gethostnameFunc(SyscallDesc *desc, int num,
230 LiveProcess *p, ThreadContext *tc);
231
232/// Target getcwd() handler.
233SyscallReturn getcwdFunc(SyscallDesc *desc, int num,
234 LiveProcess *p, ThreadContext *tc);
235
236/// Target unlink() handler.
237SyscallReturn readlinkFunc(SyscallDesc *desc, int num,
238 LiveProcess *p, ThreadContext *tc);
239
240/// Target unlink() handler.
241SyscallReturn unlinkFunc(SyscallDesc *desc, int num,
242 LiveProcess *p, ThreadContext *tc);
243
244/// Target mkdir() handler.
245SyscallReturn mkdirFunc(SyscallDesc *desc, int num,
246 LiveProcess *p, ThreadContext *tc);
247
248/// Target rename() handler.
249SyscallReturn renameFunc(SyscallDesc *desc, int num,
250 LiveProcess *p, ThreadContext *tc);
251
252
253/// Target truncate() handler.
254SyscallReturn truncateFunc(SyscallDesc *desc, int num,
255 LiveProcess *p, ThreadContext *tc);
256
257
258/// Target ftruncate() handler.
259SyscallReturn ftruncateFunc(SyscallDesc *desc, int num,
260 LiveProcess *p, ThreadContext *tc);
261
262
263/// Target ftruncate64() handler.
264SyscallReturn ftruncate64Func(SyscallDesc *desc, int num,
265 LiveProcess *p, ThreadContext *tc);
266
267
268/// Target umask() handler.
269SyscallReturn umaskFunc(SyscallDesc *desc, int num,
270 LiveProcess *p, ThreadContext *tc);
271
272
273/// Target chown() handler.
274SyscallReturn chownFunc(SyscallDesc *desc, int num,
275 LiveProcess *p, ThreadContext *tc);
276
277
278/// Target fchown() handler.
279SyscallReturn fchownFunc(SyscallDesc *desc, int num,
280 LiveProcess *p, ThreadContext *tc);
281
282/// Target dup() handler.
283SyscallReturn dupFunc(SyscallDesc *desc, int num,
284 LiveProcess *process, ThreadContext *tc);
285
286/// Target fnctl() handler.
287SyscallReturn fcntlFunc(SyscallDesc *desc, int num,
288 LiveProcess *process, ThreadContext *tc);
289
290/// Target fcntl64() handler.
291SyscallReturn fcntl64Func(SyscallDesc *desc, int num,
292 LiveProcess *process, ThreadContext *tc);
293
294/// Target setuid() handler.
295SyscallReturn setuidFunc(SyscallDesc *desc, int num,
296 LiveProcess *p, ThreadContext *tc);
297
298/// Target getpid() handler.
299SyscallReturn getpidFunc(SyscallDesc *desc, int num,
300 LiveProcess *p, ThreadContext *tc);
301
302/// Target getuid() handler.
303SyscallReturn getuidFunc(SyscallDesc *desc, int num,
304 LiveProcess *p, ThreadContext *tc);
305
306/// Target getgid() handler.
307SyscallReturn getgidFunc(SyscallDesc *desc, int num,
308 LiveProcess *p, ThreadContext *tc);
309
310/// Target getppid() handler.
311SyscallReturn getppidFunc(SyscallDesc *desc, int num,
312 LiveProcess *p, ThreadContext *tc);
313
314/// Target geteuid() handler.
315SyscallReturn geteuidFunc(SyscallDesc *desc, int num,
316 LiveProcess *p, ThreadContext *tc);
317
318/// Target getegid() handler.
319SyscallReturn getegidFunc(SyscallDesc *desc, int num,
320 LiveProcess *p, ThreadContext *tc);
321
322/// Target clone() handler.
323SyscallReturn cloneFunc(SyscallDesc *desc, int num,
324 LiveProcess *p, ThreadContext *tc);
325
326
327/// Pseudo Funcs - These functions use a different return convension,
328/// returning a second value in a register other than the normal return register
329SyscallReturn pipePseudoFunc(SyscallDesc *desc, int num,
330 LiveProcess *process, ThreadContext *tc);
331
332/// Target getpidPseudo() handler.
333SyscallReturn getpidPseudoFunc(SyscallDesc *desc, int num,
334 LiveProcess *p, ThreadContext *tc);
335
336/// Target getuidPseudo() handler.
337SyscallReturn getuidPseudoFunc(SyscallDesc *desc, int num,
338 LiveProcess *p, ThreadContext *tc);
339
340/// Target getgidPseudo() handler.
341SyscallReturn getgidPseudoFunc(SyscallDesc *desc, int num,
342 LiveProcess *p, ThreadContext *tc);
343
344
345/// A readable name for 1,000,000, for converting microseconds to seconds.
346const int one_million = 1000000;
347
348/// Approximate seconds since the epoch (1/1/1970). About a billion,
349/// by my reckoning. We want to keep this a constant (not use the
350/// real-world time) to keep simulations repeatable.
351const unsigned seconds_since_epoch = 1000000000;
352
353/// Helper function to convert current elapsed time to seconds and
354/// microseconds.
355template <class T1, class T2>
356void
357getElapsedTime(T1 &sec, T2 &usec)
358{
359 int elapsed_usecs = curTick / Clock::Int::us;
360 sec = elapsed_usecs / one_million;
361 usec = elapsed_usecs % one_million;
362}
363
364//////////////////////////////////////////////////////////////////////
365//
366// The following emulation functions are generic, but need to be
367// templated to account for differences in types, constants, etc.
368//
369//////////////////////////////////////////////////////////////////////
370
371#if NO_STAT64
372 typedef struct stat hst_stat;
373 typedef struct stat hst_stat64;
374#else
375 typedef struct stat hst_stat;
376 typedef struct stat64 hst_stat64;
377#endif
378
379//// Helper function to convert a host stat buffer to a target stat
380//// buffer. Also copies the target buffer out to the simulated
381//// memory space. Used by stat(), fstat(), and lstat().
382
383template <typename target_stat, typename host_stat>
384static void
385convertStatBuf(target_stat &tgt, host_stat *host, bool fakeTTY = false)
386{
387 using namespace TheISA;
388
389 if (fakeTTY)
390 tgt->st_dev = 0xA;
391 else
392 tgt->st_dev = host->st_dev;
393 tgt->st_dev = htog(tgt->st_dev);
394 tgt->st_ino = host->st_ino;
395 tgt->st_ino = htog(tgt->st_ino);
396 tgt->st_mode = host->st_mode;
397 if (fakeTTY) {
398 // Claim to be a character device
399 tgt->st_mode &= ~S_IFMT; // Clear S_IFMT
400 tgt->st_mode |= S_IFCHR; // Set S_IFCHR
401 }
402 tgt->st_mode = htog(tgt->st_mode);
403 tgt->st_nlink = host->st_nlink;
404 tgt->st_nlink = htog(tgt->st_nlink);
405 tgt->st_uid = host->st_uid;
406 tgt->st_uid = htog(tgt->st_uid);
407 tgt->st_gid = host->st_gid;
408 tgt->st_gid = htog(tgt->st_gid);
409 if (fakeTTY)
410 tgt->st_rdev = 0x880d;
411 else
412 tgt->st_rdev = host->st_rdev;
413 tgt->st_rdev = htog(tgt->st_rdev);
414 tgt->st_size = host->st_size;
415 tgt->st_size = htog(tgt->st_size);
416 tgt->st_atimeX = host->st_atime;
417 tgt->st_atimeX = htog(tgt->st_atimeX);
418 tgt->st_mtimeX = host->st_mtime;
419 tgt->st_mtimeX = htog(tgt->st_mtimeX);
420 tgt->st_ctimeX = host->st_ctime;
421 tgt->st_ctimeX = htog(tgt->st_ctimeX);
422 // Force the block size to be 8k. This helps to ensure buffered io works
423 // consistently across different hosts.
424 tgt->st_blksize = 0x2000;
425 tgt->st_blksize = htog(tgt->st_blksize);
426 tgt->st_blocks = host->st_blocks;
427 tgt->st_blocks = htog(tgt->st_blocks);
428}
429
430// Same for stat64
431
432template <typename target_stat, typename host_stat64>
433static void
434convertStat64Buf(target_stat &tgt, host_stat64 *host, bool fakeTTY = false)
435{
436 using namespace TheISA;
437
438 convertStatBuf<target_stat, host_stat64>(tgt, host, fakeTTY);
439#if defined(STAT_HAVE_NSEC)
440 tgt->st_atime_nsec = host->st_atime_nsec;
441 tgt->st_atime_nsec = htog(tgt->st_atime_nsec);
442 tgt->st_mtime_nsec = host->st_mtime_nsec;
443 tgt->st_mtime_nsec = htog(tgt->st_mtime_nsec);
444 tgt->st_ctime_nsec = host->st_ctime_nsec;
445 tgt->st_ctime_nsec = htog(tgt->st_ctime_nsec);
446#else
447 tgt->st_atime_nsec = 0;
448 tgt->st_mtime_nsec = 0;
449 tgt->st_ctime_nsec = 0;
450#endif
451}
452
453//Here are a couple convenience functions
454template<class OS>
455static void
456copyOutStatBuf(TranslatingPort * mem, Addr addr,
457 hst_stat *host, bool fakeTTY = false)
458{
459 typedef TypedBufferArg<typename OS::tgt_stat> tgt_stat_buf;
460 tgt_stat_buf tgt(addr);
461 convertStatBuf<tgt_stat_buf, hst_stat>(tgt, host, fakeTTY);
462 tgt.copyOut(mem);
463}
464
465template<class OS>
466static void
467copyOutStat64Buf(TranslatingPort * mem, Addr addr,
468 hst_stat64 *host, bool fakeTTY = false)
469{
470 typedef TypedBufferArg<typename OS::tgt_stat64> tgt_stat_buf;
471 tgt_stat_buf tgt(addr);
472 convertStat64Buf<tgt_stat_buf, hst_stat64>(tgt, host, fakeTTY);
473 tgt.copyOut(mem);
474}
475
476/// Target ioctl() handler. For the most part, programs call ioctl()
477/// only to find out if their stdout is a tty, to determine whether to
478/// do line or block buffering.
479template <class OS>
480SyscallReturn
481ioctlFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
482 ThreadContext *tc)
483{
484 int fd = process->getSyscallArg(tc, 0);
485 unsigned req = process->getSyscallArg(tc, 1);
486
487 DPRINTF(SyscallVerbose, "ioctl(%d, 0x%x, ...)\n", fd, req);
488
489 if (fd < 0 || process->sim_fd(fd) < 0) {
490 // doesn't map to any simulator fd: not a valid target fd
491 return -EBADF;
492 }
493
494 switch (req) {
495 case OS::TIOCISATTY_:
496 case OS::TIOCGETP_:
497 case OS::TIOCSETP_:
498 case OS::TIOCSETN_:
499 case OS::TIOCSETC_:
500 case OS::TIOCGETC_:
501 case OS::TIOCGETS_:
502 case OS::TIOCGETA_:
|
503 return -ENOTTY;
504
505 default:
506 fatal("Unsupported ioctl call: ioctl(%d, 0x%x, ...) @ 0x%llx\n",
507 fd, req, tc->readPC());
508 }
509}
510
511/// Target open() handler.
512template <class OS>
513SyscallReturn
514openFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
515 ThreadContext *tc)
516{
517 std::string path;
518
519 if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
520 return -EFAULT;
521
522 if (path == "/dev/sysdev0") {
523 // This is a memory-mapped high-resolution timer device on Alpha.
524 // We don't support it, so just punt.
525 warn("Ignoring open(%s, ...)\n", path);
526 return -ENOENT;
527 }
528
529 int tgtFlags = process->getSyscallArg(tc, 1);
530 int mode = process->getSyscallArg(tc, 2);
531 int hostFlags = 0;
532
533 // translate open flags
534 for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) {
535 if (tgtFlags & OS::openFlagTable[i].tgtFlag) {
536 tgtFlags &= ~OS::openFlagTable[i].tgtFlag;
537 hostFlags |= OS::openFlagTable[i].hostFlag;
538 }
539 }
540
541 // any target flags left?
542 if (tgtFlags != 0)
543 warn("Syscall: open: cannot decode flags 0x%x", tgtFlags);
544
545#ifdef __CYGWIN32__
546 hostFlags |= O_BINARY;
547#endif
548
549 // Adjust path for current working directory
550 path = process->fullPath(path);
551
552 DPRINTF(SyscallVerbose, "opening file %s\n", path.c_str());
553
554 int fd;
555 if (!path.compare(0, 6, "/proc/") || !path.compare(0, 8, "/system/") ||
556 !path.compare(0, 10, "/platform/") || !path.compare(0, 5, "/sys/")) {
557 // It's a proc/sys entery and requires special handling
558 fd = OS::openSpecialFile(path, process, tc);
559 return (fd == -1) ? -1 : process->alloc_fd(fd,path.c_str(),hostFlags,mode, false);
560 } else {
561 // open the file
562 fd = open(path.c_str(), hostFlags, mode);
563 return (fd == -1) ? -errno : process->alloc_fd(fd,path.c_str(),hostFlags,mode, false);
564 }
565
566}
567
568/// Target sysinfo() handler.
569template <class OS>
570SyscallReturn
571sysinfoFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
572 ThreadContext *tc)
573{
574
575 TypedBufferArg<typename OS::tgt_sysinfo> sysinfo(process->getSyscallArg(tc, 0));
576
577 sysinfo->uptime=seconds_since_epoch;
578 sysinfo->totalram=process->system->memSize();
579
580 sysinfo.copyOut(tc->getMemPort());
581
582 return 0;
583}
584
585/// Target chmod() handler.
586template <class OS>
587SyscallReturn
588chmodFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
589 ThreadContext *tc)
590{
591 std::string path;
592
593 if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
594 return -EFAULT;
595
596 uint32_t mode = process->getSyscallArg(tc, 1);
597 mode_t hostMode = 0;
598
599 // XXX translate mode flags via OS::something???
600 hostMode = mode;
601
602 // Adjust path for current working directory
603 path = process->fullPath(path);
604
605 // do the chmod
606 int result = chmod(path.c_str(), hostMode);
607 if (result < 0)
608 return -errno;
609
610 return 0;
611}
612
613
614/// Target fchmod() handler.
615template <class OS>
616SyscallReturn
617fchmodFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
618 ThreadContext *tc)
619{
620 int fd = process->getSyscallArg(tc, 0);
621 if (fd < 0 || process->sim_fd(fd) < 0) {
622 // doesn't map to any simulator fd: not a valid target fd
623 return -EBADF;
624 }
625
626 uint32_t mode = process->getSyscallArg(tc, 1);
627 mode_t hostMode = 0;
628
629 // XXX translate mode flags via OS::someting???
630 hostMode = mode;
631
632 // do the fchmod
633 int result = fchmod(process->sim_fd(fd), hostMode);
634 if (result < 0)
635 return -errno;
636
637 return 0;
638}
639
640/// Target mremap() handler.
641template <class OS>
642SyscallReturn
643mremapFunc(SyscallDesc *desc, int callnum, LiveProcess *process, ThreadContext *tc)
644{
645 Addr start = process->getSyscallArg(tc, 0);
646 uint64_t old_length = process->getSyscallArg(tc, 1);
647 uint64_t new_length = process->getSyscallArg(tc, 2);
648 uint64_t flags = process->getSyscallArg(tc, 3);
649
650 if ((start % TheISA::VMPageSize != 0) ||
651 (new_length % TheISA::VMPageSize != 0)) {
652 warn("mremap failing: arguments not page aligned");
653 return -EINVAL;
654 }
655
656 if (new_length > old_length) {
657 if ((start + old_length) == process->mmap_end) {
658 uint64_t diff = new_length - old_length;
659 process->pTable->allocate(process->mmap_end, diff);
660 process->mmap_end += diff;
661 return start;
662 } else {
663 // sys/mman.h defined MREMAP_MAYMOVE
664 if (!(flags & 1)) {
665 warn("can't remap here and MREMAP_MAYMOVE flag not set\n");
666 return -ENOMEM;
667 } else {
668 process->pTable->remap(start, old_length, process->mmap_end);
669 warn("mremapping to totally new vaddr %08p-%08p, adding %d\n",
670 process->mmap_end, process->mmap_end + new_length, new_length);
671 start = process->mmap_end;
672 // add on the remaining unallocated pages
673 process->pTable->allocate(start + old_length, new_length - old_length);
674 process->mmap_end += new_length;
675 warn("returning %08p as start\n", start);
676 return start;
677 }
678 }
679 } else {
680 process->pTable->deallocate(start + new_length, old_length -
681 new_length);
682 return start;
683 }
684}
685
686/// Target stat() handler.
687template <class OS>
688SyscallReturn
689statFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
690 ThreadContext *tc)
691{
692 std::string path;
693
694 if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
695 return -EFAULT;
696
697 // Adjust path for current working directory
698 path = process->fullPath(path);
699
700 struct stat hostBuf;
701 int result = stat(path.c_str(), &hostBuf);
702
703 if (result < 0)
704 return -errno;
705
706 copyOutStatBuf<OS>(tc->getMemPort(), process->getSyscallArg(tc, 1),
707 &hostBuf);
708
709 return 0;
710}
711
712
713/// Target stat64() handler.
714template <class OS>
715SyscallReturn
716stat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
717 ThreadContext *tc)
718{
719 std::string path;
720
721 if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
722 return -EFAULT;
723
724 // Adjust path for current working directory
725 path = process->fullPath(path);
726
727#if NO_STAT64
728 struct stat hostBuf;
729 int result = stat(path.c_str(), &hostBuf);
730#else
731 struct stat64 hostBuf;
732 int result = stat64(path.c_str(), &hostBuf);
733#endif
734
735 if (result < 0)
736 return -errno;
737
738 copyOutStat64Buf<OS>(tc->getMemPort(), process->getSyscallArg(tc, 1),
739 &hostBuf);
740
741 return 0;
742}
743
744
745/// Target fstat64() handler.
746template <class OS>
747SyscallReturn
748fstat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
749 ThreadContext *tc)
750{
751 int fd = process->getSyscallArg(tc, 0);
752 if (fd < 0 || process->sim_fd(fd) < 0) {
753 // doesn't map to any simulator fd: not a valid target fd
754 return -EBADF;
755 }
756
757#if NO_STAT64
758 struct stat hostBuf;
759 int result = fstat(process->sim_fd(fd), &hostBuf);
760#else
761 struct stat64 hostBuf;
762 int result = fstat64(process->sim_fd(fd), &hostBuf);
763#endif
764
765 if (result < 0)
766 return -errno;
767
768 copyOutStat64Buf<OS>(tc->getMemPort(), process->getSyscallArg(tc, 1),
769 &hostBuf, (fd == 1));
770
771 return 0;
772}
773
774
775/// Target lstat() handler.
776template <class OS>
777SyscallReturn
778lstatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
779 ThreadContext *tc)
780{
781 std::string path;
782
783 if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
784 return -EFAULT;
785
786 // Adjust path for current working directory
787 path = process->fullPath(path);
788
789 struct stat hostBuf;
790 int result = lstat(path.c_str(), &hostBuf);
791
792 if (result < 0)
793 return -errno;
794
795 copyOutStatBuf<OS>(tc->getMemPort(), process->getSyscallArg(tc, 1),
796 &hostBuf);
797
798 return 0;
799}
800
801/// Target lstat64() handler.
802template <class OS>
803SyscallReturn
804lstat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
805 ThreadContext *tc)
806{
807 std::string path;
808
809 if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
810 return -EFAULT;
811
812 // Adjust path for current working directory
813 path = process->fullPath(path);
814
815#if NO_STAT64
816 struct stat hostBuf;
817 int result = lstat(path.c_str(), &hostBuf);
818#else
819 struct stat64 hostBuf;
820 int result = lstat64(path.c_str(), &hostBuf);
821#endif
822
823 if (result < 0)
824 return -errno;
825
826 copyOutStat64Buf<OS>(tc->getMemPort(), process->getSyscallArg(tc, 1),
827 &hostBuf);
828
829 return 0;
830}
831
832/// Target fstat() handler.
833template <class OS>
834SyscallReturn
835fstatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
836 ThreadContext *tc)
837{
838 int fd = process->sim_fd(process->getSyscallArg(tc, 0));
839
840 DPRINTF(SyscallVerbose, "fstat(%d, ...)\n", fd);
841
842 if (fd < 0)
843 return -EBADF;
844
845 struct stat hostBuf;
846 int result = fstat(fd, &hostBuf);
847
848 if (result < 0)
849 return -errno;
850
851 copyOutStatBuf<OS>(tc->getMemPort(), process->getSyscallArg(tc, 1),
852 &hostBuf, (fd == 1));
853
854 return 0;
855}
856
857
858/// Target statfs() handler.
859template <class OS>
860SyscallReturn
861statfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
862 ThreadContext *tc)
863{
864 std::string path;
865
866 if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
867 return -EFAULT;
868
869 // Adjust path for current working directory
870 path = process->fullPath(path);
871
872 struct statfs hostBuf;
873 int result = statfs(path.c_str(), &hostBuf);
874
875 if (result < 0)
876 return -errno;
877
878 OS::copyOutStatfsBuf(tc->getMemPort(),
879 (Addr)(process->getSyscallArg(tc, 1)), &hostBuf);
880
881 return 0;
882}
883
884
885/// Target fstatfs() handler.
886template <class OS>
887SyscallReturn
888fstatfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
889 ThreadContext *tc)
890{
891 int fd = process->sim_fd(process->getSyscallArg(tc, 0));
892
893 if (fd < 0)
894 return -EBADF;
895
896 struct statfs hostBuf;
897 int result = fstatfs(fd, &hostBuf);
898
899 if (result < 0)
900 return -errno;
901
902 OS::copyOutStatfsBuf(tc->getMemPort(), process->getSyscallArg(tc, 1),
903 &hostBuf);
904
905 return 0;
906}
907
908
909/// Target writev() handler.
910template <class OS>
911SyscallReturn
912writevFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
913 ThreadContext *tc)
914{
915 int fd = process->getSyscallArg(tc, 0);
916 if (fd < 0 || process->sim_fd(fd) < 0) {
917 // doesn't map to any simulator fd: not a valid target fd
918 return -EBADF;
919 }
920
921 TranslatingPort *p = tc->getMemPort();
922 uint64_t tiov_base = process->getSyscallArg(tc, 1);
923 size_t count = process->getSyscallArg(tc, 2);
924 struct iovec hiov[count];
925 for (size_t i = 0; i < count; ++i) {
926 typename OS::tgt_iovec tiov;
927
928 p->readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec),
929 (uint8_t*)&tiov, sizeof(typename OS::tgt_iovec));
930 hiov[i].iov_len = gtoh(tiov.iov_len);
931 hiov[i].iov_base = new char [hiov[i].iov_len];
932 p->readBlob(gtoh(tiov.iov_base), (uint8_t *)hiov[i].iov_base,
933 hiov[i].iov_len);
934 }
935
936 int result = writev(process->sim_fd(fd), hiov, count);
937
938 for (size_t i = 0; i < count; ++i)
939 delete [] (char *)hiov[i].iov_base;
940
941 if (result < 0)
942 return -errno;
943
944 return 0;
945}
946
947
948/// Target mmap() handler.
949///
950/// We don't really handle mmap(). If the target is mmaping an
951/// anonymous region or /dev/zero, we can get away with doing basically
952/// nothing (since memory is initialized to zero and the simulator
953/// doesn't really check addresses anyway). Always print a warning,
954/// since this could be seriously broken if we're not mapping
955/// /dev/zero.
956//
957/// Someday we should explicitly check for /dev/zero in open, flag the
958/// file descriptor, and fail (or implement!) a non-anonymous mmap to
959/// anything else.
960template <class OS>
961SyscallReturn
962mmapFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
963{
964 Addr start = p->getSyscallArg(tc, 0);
965 uint64_t length = p->getSyscallArg(tc, 1);
966 // int prot = p->getSyscallArg(tc, 2);
967 int flags = p->getSyscallArg(tc, 3);
968 // int fd = p->sim_fd(p->getSyscallArg(tc, 4));
969 // int offset = p->getSyscallArg(tc, 5);
970
971
972 if ((start % TheISA::VMPageSize) != 0 ||
973 (length % TheISA::VMPageSize) != 0) {
974 warn("mmap failing: arguments not page-aligned: "
975 "start 0x%x length 0x%x",
976 start, length);
977 return -EINVAL;
978 }
979
980 if (start != 0) {
981 warn("mmap: ignoring suggested map address 0x%x, using 0x%x",
982 start, p->mmap_end);
983 }
984
985 // pick next address from our "mmap region"
986 if (OS::mmapGrowsDown()) {
987 start = p->mmap_end - length;
988 p->mmap_end = start;
989 } else {
990 start = p->mmap_end;
991 p->mmap_end += length;
992 }
993 p->pTable->allocate(start, length);
994
995 if (!(flags & OS::TGT_MAP_ANONYMOUS)) {
996 warn("allowing mmap of file @ fd %d. "
997 "This will break if not /dev/zero.", p->getSyscallArg(tc, 4));
998 }
999
1000 return start;
1001}
1002
1003/// Target getrlimit() handler.
1004template <class OS>
1005SyscallReturn
1006getrlimitFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1007 ThreadContext *tc)
1008{
1009 unsigned resource = process->getSyscallArg(tc, 0);
1010 TypedBufferArg<typename OS::rlimit> rlp(process->getSyscallArg(tc, 1));
1011
1012 switch (resource) {
1013 case OS::TGT_RLIMIT_STACK:
1014 // max stack size in bytes: make up a number (8MB for now)
1015 rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024;
1016 rlp->rlim_cur = htog(rlp->rlim_cur);
1017 rlp->rlim_max = htog(rlp->rlim_max);
1018 break;
1019
1020 case OS::TGT_RLIMIT_DATA:
1021 // max data segment size in bytes: make up a number
1022 rlp->rlim_cur = rlp->rlim_max = 256 * 1024 * 1024;
1023 rlp->rlim_cur = htog(rlp->rlim_cur);
1024 rlp->rlim_max = htog(rlp->rlim_max);
1025 break;
1026
1027 default:
1028 std::cerr << "getrlimitFunc: unimplemented resource " << resource
1029 << std::endl;
1030 abort();
1031 break;
1032 }
1033
1034 rlp.copyOut(tc->getMemPort());
1035 return 0;
1036}
1037
1038/// Target gettimeofday() handler.
1039template <class OS>
1040SyscallReturn
1041gettimeofdayFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1042 ThreadContext *tc)
1043{
1044 TypedBufferArg<typename OS::timeval> tp(process->getSyscallArg(tc, 0));
1045
1046 getElapsedTime(tp->tv_sec, tp->tv_usec);
1047 tp->tv_sec += seconds_since_epoch;
1048 tp->tv_sec = TheISA::htog(tp->tv_sec);
1049 tp->tv_usec = TheISA::htog(tp->tv_usec);
1050
1051 tp.copyOut(tc->getMemPort());
1052
1053 return 0;
1054}
1055
1056
1057/// Target utimes() handler.
1058template <class OS>
1059SyscallReturn
1060utimesFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1061 ThreadContext *tc)
1062{
1063 std::string path;
1064
1065 if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
1066 return -EFAULT;
1067
1068 TypedBufferArg<typename OS::timeval [2]> tp(process->getSyscallArg(tc, 1));
1069 tp.copyIn(tc->getMemPort());
1070
1071 struct timeval hostTimeval[2];
1072 for (int i = 0; i < 2; ++i)
1073 {
1074 hostTimeval[i].tv_sec = gtoh((*tp)[i].tv_sec);
1075 hostTimeval[i].tv_usec = gtoh((*tp)[i].tv_usec);
1076 }
1077
1078 // Adjust path for current working directory
1079 path = process->fullPath(path);
1080
1081 int result = utimes(path.c_str(), hostTimeval);
1082
1083 if (result < 0)
1084 return -errno;
1085
1086 return 0;
1087}
1088/// Target getrusage() function.
1089template <class OS>
1090SyscallReturn
1091getrusageFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1092 ThreadContext *tc)
1093{
1094 int who = process->getSyscallArg(tc, 0); // THREAD, SELF, or CHILDREN
1095 TypedBufferArg<typename OS::rusage> rup(process->getSyscallArg(tc, 1));
1096
1097 rup->ru_utime.tv_sec = 0;
1098 rup->ru_utime.tv_usec = 0;
1099 rup->ru_stime.tv_sec = 0;
1100 rup->ru_stime.tv_usec = 0;
1101 rup->ru_maxrss = 0;
1102 rup->ru_ixrss = 0;
1103 rup->ru_idrss = 0;
1104 rup->ru_isrss = 0;
1105 rup->ru_minflt = 0;
1106 rup->ru_majflt = 0;
1107 rup->ru_nswap = 0;
1108 rup->ru_inblock = 0;
1109 rup->ru_oublock = 0;
1110 rup->ru_msgsnd = 0;
1111 rup->ru_msgrcv = 0;
1112 rup->ru_nsignals = 0;
1113 rup->ru_nvcsw = 0;
1114 rup->ru_nivcsw = 0;
1115
1116 switch (who) {
1117 case OS::TGT_RUSAGE_SELF:
1118 getElapsedTime(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec);
1119 rup->ru_utime.tv_sec = htog(rup->ru_utime.tv_sec);
1120 rup->ru_utime.tv_usec = htog(rup->ru_utime.tv_usec);
1121 break;
1122
1123 case OS::TGT_RUSAGE_CHILDREN:
1124 // do nothing. We have no child processes, so they take no time.
1125 break;
1126
1127 default:
1128 // don't really handle THREAD or CHILDREN, but just warn and
1129 // plow ahead
1130 warn("getrusage() only supports RUSAGE_SELF. Parameter %d ignored.",
1131 who);
1132 }
1133
1134 rup.copyOut(tc->getMemPort());
1135
1136 return 0;
1137}
1138
1139/// Target times() function.
1140template <class OS>
1141SyscallReturn
1142timesFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1143 ThreadContext *tc)
1144{
1145 TypedBufferArg<typename OS::tms> bufp(process->getSyscallArg(tc, 0));
1146
1147 // Fill in the time structure (in clocks)
1148 int64_t clocks = curTick * OS::_SC_CLK_TCK / Clock::Int::s;
1149 bufp->tms_utime = clocks;
1150 bufp->tms_stime = 0;
1151 bufp->tms_cutime = 0;
1152 bufp->tms_cstime = 0;
1153
1154 // Convert to host endianness
1155 bufp->tms_utime = htog(bufp->tms_utime);
1156
1157 // Write back
1158 bufp.copyOut(tc->getMemPort());
1159
1160 // Return clock ticks since system boot
1161 return clocks;
1162}
1163
1164/// Target time() function.
1165template <class OS>
1166SyscallReturn
1167timeFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1168 ThreadContext *tc)
1169{
1170 typename OS::time_t sec, usec;
1171 getElapsedTime(sec, usec);
1172 sec += seconds_since_epoch;
1173
1174 Addr taddr = (Addr)process->getSyscallArg(tc, 0);
1175 if(taddr != 0) {
1176 typename OS::time_t t = sec;
1177 t = htog(t);
1178 TranslatingPort *p = tc->getMemPort();
1179 p->writeBlob(taddr, (uint8_t*)&t, (int)sizeof(typename OS::time_t));
1180 }
1181 return sec;
1182}
1183
1184
1185#endif // __SIM_SYSCALL_EMUL_HH__
| 504 return -ENOTTY;
505
506 default:
507 fatal("Unsupported ioctl call: ioctl(%d, 0x%x, ...) @ 0x%llx\n",
508 fd, req, tc->readPC());
509 }
510}
511
512/// Target open() handler.
513template <class OS>
514SyscallReturn
515openFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
516 ThreadContext *tc)
517{
518 std::string path;
519
520 if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
521 return -EFAULT;
522
523 if (path == "/dev/sysdev0") {
524 // This is a memory-mapped high-resolution timer device on Alpha.
525 // We don't support it, so just punt.
526 warn("Ignoring open(%s, ...)\n", path);
527 return -ENOENT;
528 }
529
530 int tgtFlags = process->getSyscallArg(tc, 1);
531 int mode = process->getSyscallArg(tc, 2);
532 int hostFlags = 0;
533
534 // translate open flags
535 for (int i = 0; i < OS::NUM_OPEN_FLAGS; i++) {
536 if (tgtFlags & OS::openFlagTable[i].tgtFlag) {
537 tgtFlags &= ~OS::openFlagTable[i].tgtFlag;
538 hostFlags |= OS::openFlagTable[i].hostFlag;
539 }
540 }
541
542 // any target flags left?
543 if (tgtFlags != 0)
544 warn("Syscall: open: cannot decode flags 0x%x", tgtFlags);
545
546#ifdef __CYGWIN32__
547 hostFlags |= O_BINARY;
548#endif
549
550 // Adjust path for current working directory
551 path = process->fullPath(path);
552
553 DPRINTF(SyscallVerbose, "opening file %s\n", path.c_str());
554
555 int fd;
556 if (!path.compare(0, 6, "/proc/") || !path.compare(0, 8, "/system/") ||
557 !path.compare(0, 10, "/platform/") || !path.compare(0, 5, "/sys/")) {
558 // It's a proc/sys entery and requires special handling
559 fd = OS::openSpecialFile(path, process, tc);
560 return (fd == -1) ? -1 : process->alloc_fd(fd,path.c_str(),hostFlags,mode, false);
561 } else {
562 // open the file
563 fd = open(path.c_str(), hostFlags, mode);
564 return (fd == -1) ? -errno : process->alloc_fd(fd,path.c_str(),hostFlags,mode, false);
565 }
566
567}
568
569/// Target sysinfo() handler.
570template <class OS>
571SyscallReturn
572sysinfoFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
573 ThreadContext *tc)
574{
575
576 TypedBufferArg<typename OS::tgt_sysinfo> sysinfo(process->getSyscallArg(tc, 0));
577
578 sysinfo->uptime=seconds_since_epoch;
579 sysinfo->totalram=process->system->memSize();
580
581 sysinfo.copyOut(tc->getMemPort());
582
583 return 0;
584}
585
586/// Target chmod() handler.
587template <class OS>
588SyscallReturn
589chmodFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
590 ThreadContext *tc)
591{
592 std::string path;
593
594 if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
595 return -EFAULT;
596
597 uint32_t mode = process->getSyscallArg(tc, 1);
598 mode_t hostMode = 0;
599
600 // XXX translate mode flags via OS::something???
601 hostMode = mode;
602
603 // Adjust path for current working directory
604 path = process->fullPath(path);
605
606 // do the chmod
607 int result = chmod(path.c_str(), hostMode);
608 if (result < 0)
609 return -errno;
610
611 return 0;
612}
613
614
615/// Target fchmod() handler.
616template <class OS>
617SyscallReturn
618fchmodFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
619 ThreadContext *tc)
620{
621 int fd = process->getSyscallArg(tc, 0);
622 if (fd < 0 || process->sim_fd(fd) < 0) {
623 // doesn't map to any simulator fd: not a valid target fd
624 return -EBADF;
625 }
626
627 uint32_t mode = process->getSyscallArg(tc, 1);
628 mode_t hostMode = 0;
629
630 // XXX translate mode flags via OS::someting???
631 hostMode = mode;
632
633 // do the fchmod
634 int result = fchmod(process->sim_fd(fd), hostMode);
635 if (result < 0)
636 return -errno;
637
638 return 0;
639}
640
641/// Target mremap() handler.
642template <class OS>
643SyscallReturn
644mremapFunc(SyscallDesc *desc, int callnum, LiveProcess *process, ThreadContext *tc)
645{
646 Addr start = process->getSyscallArg(tc, 0);
647 uint64_t old_length = process->getSyscallArg(tc, 1);
648 uint64_t new_length = process->getSyscallArg(tc, 2);
649 uint64_t flags = process->getSyscallArg(tc, 3);
650
651 if ((start % TheISA::VMPageSize != 0) ||
652 (new_length % TheISA::VMPageSize != 0)) {
653 warn("mremap failing: arguments not page aligned");
654 return -EINVAL;
655 }
656
657 if (new_length > old_length) {
658 if ((start + old_length) == process->mmap_end) {
659 uint64_t diff = new_length - old_length;
660 process->pTable->allocate(process->mmap_end, diff);
661 process->mmap_end += diff;
662 return start;
663 } else {
664 // sys/mman.h defined MREMAP_MAYMOVE
665 if (!(flags & 1)) {
666 warn("can't remap here and MREMAP_MAYMOVE flag not set\n");
667 return -ENOMEM;
668 } else {
669 process->pTable->remap(start, old_length, process->mmap_end);
670 warn("mremapping to totally new vaddr %08p-%08p, adding %d\n",
671 process->mmap_end, process->mmap_end + new_length, new_length);
672 start = process->mmap_end;
673 // add on the remaining unallocated pages
674 process->pTable->allocate(start + old_length, new_length - old_length);
675 process->mmap_end += new_length;
676 warn("returning %08p as start\n", start);
677 return start;
678 }
679 }
680 } else {
681 process->pTable->deallocate(start + new_length, old_length -
682 new_length);
683 return start;
684 }
685}
686
687/// Target stat() handler.
688template <class OS>
689SyscallReturn
690statFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
691 ThreadContext *tc)
692{
693 std::string path;
694
695 if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
696 return -EFAULT;
697
698 // Adjust path for current working directory
699 path = process->fullPath(path);
700
701 struct stat hostBuf;
702 int result = stat(path.c_str(), &hostBuf);
703
704 if (result < 0)
705 return -errno;
706
707 copyOutStatBuf<OS>(tc->getMemPort(), process->getSyscallArg(tc, 1),
708 &hostBuf);
709
710 return 0;
711}
712
713
714/// Target stat64() handler.
715template <class OS>
716SyscallReturn
717stat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
718 ThreadContext *tc)
719{
720 std::string path;
721
722 if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
723 return -EFAULT;
724
725 // Adjust path for current working directory
726 path = process->fullPath(path);
727
728#if NO_STAT64
729 struct stat hostBuf;
730 int result = stat(path.c_str(), &hostBuf);
731#else
732 struct stat64 hostBuf;
733 int result = stat64(path.c_str(), &hostBuf);
734#endif
735
736 if (result < 0)
737 return -errno;
738
739 copyOutStat64Buf<OS>(tc->getMemPort(), process->getSyscallArg(tc, 1),
740 &hostBuf);
741
742 return 0;
743}
744
745
746/// Target fstat64() handler.
747template <class OS>
748SyscallReturn
749fstat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
750 ThreadContext *tc)
751{
752 int fd = process->getSyscallArg(tc, 0);
753 if (fd < 0 || process->sim_fd(fd) < 0) {
754 // doesn't map to any simulator fd: not a valid target fd
755 return -EBADF;
756 }
757
758#if NO_STAT64
759 struct stat hostBuf;
760 int result = fstat(process->sim_fd(fd), &hostBuf);
761#else
762 struct stat64 hostBuf;
763 int result = fstat64(process->sim_fd(fd), &hostBuf);
764#endif
765
766 if (result < 0)
767 return -errno;
768
769 copyOutStat64Buf<OS>(tc->getMemPort(), process->getSyscallArg(tc, 1),
770 &hostBuf, (fd == 1));
771
772 return 0;
773}
774
775
776/// Target lstat() handler.
777template <class OS>
778SyscallReturn
779lstatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
780 ThreadContext *tc)
781{
782 std::string path;
783
784 if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
785 return -EFAULT;
786
787 // Adjust path for current working directory
788 path = process->fullPath(path);
789
790 struct stat hostBuf;
791 int result = lstat(path.c_str(), &hostBuf);
792
793 if (result < 0)
794 return -errno;
795
796 copyOutStatBuf<OS>(tc->getMemPort(), process->getSyscallArg(tc, 1),
797 &hostBuf);
798
799 return 0;
800}
801
802/// Target lstat64() handler.
803template <class OS>
804SyscallReturn
805lstat64Func(SyscallDesc *desc, int callnum, LiveProcess *process,
806 ThreadContext *tc)
807{
808 std::string path;
809
810 if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
811 return -EFAULT;
812
813 // Adjust path for current working directory
814 path = process->fullPath(path);
815
816#if NO_STAT64
817 struct stat hostBuf;
818 int result = lstat(path.c_str(), &hostBuf);
819#else
820 struct stat64 hostBuf;
821 int result = lstat64(path.c_str(), &hostBuf);
822#endif
823
824 if (result < 0)
825 return -errno;
826
827 copyOutStat64Buf<OS>(tc->getMemPort(), process->getSyscallArg(tc, 1),
828 &hostBuf);
829
830 return 0;
831}
832
833/// Target fstat() handler.
834template <class OS>
835SyscallReturn
836fstatFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
837 ThreadContext *tc)
838{
839 int fd = process->sim_fd(process->getSyscallArg(tc, 0));
840
841 DPRINTF(SyscallVerbose, "fstat(%d, ...)\n", fd);
842
843 if (fd < 0)
844 return -EBADF;
845
846 struct stat hostBuf;
847 int result = fstat(fd, &hostBuf);
848
849 if (result < 0)
850 return -errno;
851
852 copyOutStatBuf<OS>(tc->getMemPort(), process->getSyscallArg(tc, 1),
853 &hostBuf, (fd == 1));
854
855 return 0;
856}
857
858
859/// Target statfs() handler.
860template <class OS>
861SyscallReturn
862statfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
863 ThreadContext *tc)
864{
865 std::string path;
866
867 if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
868 return -EFAULT;
869
870 // Adjust path for current working directory
871 path = process->fullPath(path);
872
873 struct statfs hostBuf;
874 int result = statfs(path.c_str(), &hostBuf);
875
876 if (result < 0)
877 return -errno;
878
879 OS::copyOutStatfsBuf(tc->getMemPort(),
880 (Addr)(process->getSyscallArg(tc, 1)), &hostBuf);
881
882 return 0;
883}
884
885
886/// Target fstatfs() handler.
887template <class OS>
888SyscallReturn
889fstatfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
890 ThreadContext *tc)
891{
892 int fd = process->sim_fd(process->getSyscallArg(tc, 0));
893
894 if (fd < 0)
895 return -EBADF;
896
897 struct statfs hostBuf;
898 int result = fstatfs(fd, &hostBuf);
899
900 if (result < 0)
901 return -errno;
902
903 OS::copyOutStatfsBuf(tc->getMemPort(), process->getSyscallArg(tc, 1),
904 &hostBuf);
905
906 return 0;
907}
908
909
910/// Target writev() handler.
911template <class OS>
912SyscallReturn
913writevFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
914 ThreadContext *tc)
915{
916 int fd = process->getSyscallArg(tc, 0);
917 if (fd < 0 || process->sim_fd(fd) < 0) {
918 // doesn't map to any simulator fd: not a valid target fd
919 return -EBADF;
920 }
921
922 TranslatingPort *p = tc->getMemPort();
923 uint64_t tiov_base = process->getSyscallArg(tc, 1);
924 size_t count = process->getSyscallArg(tc, 2);
925 struct iovec hiov[count];
926 for (size_t i = 0; i < count; ++i) {
927 typename OS::tgt_iovec tiov;
928
929 p->readBlob(tiov_base + i*sizeof(typename OS::tgt_iovec),
930 (uint8_t*)&tiov, sizeof(typename OS::tgt_iovec));
931 hiov[i].iov_len = gtoh(tiov.iov_len);
932 hiov[i].iov_base = new char [hiov[i].iov_len];
933 p->readBlob(gtoh(tiov.iov_base), (uint8_t *)hiov[i].iov_base,
934 hiov[i].iov_len);
935 }
936
937 int result = writev(process->sim_fd(fd), hiov, count);
938
939 for (size_t i = 0; i < count; ++i)
940 delete [] (char *)hiov[i].iov_base;
941
942 if (result < 0)
943 return -errno;
944
945 return 0;
946}
947
948
949/// Target mmap() handler.
950///
951/// We don't really handle mmap(). If the target is mmaping an
952/// anonymous region or /dev/zero, we can get away with doing basically
953/// nothing (since memory is initialized to zero and the simulator
954/// doesn't really check addresses anyway). Always print a warning,
955/// since this could be seriously broken if we're not mapping
956/// /dev/zero.
957//
958/// Someday we should explicitly check for /dev/zero in open, flag the
959/// file descriptor, and fail (or implement!) a non-anonymous mmap to
960/// anything else.
961template <class OS>
962SyscallReturn
963mmapFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
964{
965 Addr start = p->getSyscallArg(tc, 0);
966 uint64_t length = p->getSyscallArg(tc, 1);
967 // int prot = p->getSyscallArg(tc, 2);
968 int flags = p->getSyscallArg(tc, 3);
969 // int fd = p->sim_fd(p->getSyscallArg(tc, 4));
970 // int offset = p->getSyscallArg(tc, 5);
971
972
973 if ((start % TheISA::VMPageSize) != 0 ||
974 (length % TheISA::VMPageSize) != 0) {
975 warn("mmap failing: arguments not page-aligned: "
976 "start 0x%x length 0x%x",
977 start, length);
978 return -EINVAL;
979 }
980
981 if (start != 0) {
982 warn("mmap: ignoring suggested map address 0x%x, using 0x%x",
983 start, p->mmap_end);
984 }
985
986 // pick next address from our "mmap region"
987 if (OS::mmapGrowsDown()) {
988 start = p->mmap_end - length;
989 p->mmap_end = start;
990 } else {
991 start = p->mmap_end;
992 p->mmap_end += length;
993 }
994 p->pTable->allocate(start, length);
995
996 if (!(flags & OS::TGT_MAP_ANONYMOUS)) {
997 warn("allowing mmap of file @ fd %d. "
998 "This will break if not /dev/zero.", p->getSyscallArg(tc, 4));
999 }
1000
1001 return start;
1002}
1003
1004/// Target getrlimit() handler.
1005template <class OS>
1006SyscallReturn
1007getrlimitFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1008 ThreadContext *tc)
1009{
1010 unsigned resource = process->getSyscallArg(tc, 0);
1011 TypedBufferArg<typename OS::rlimit> rlp(process->getSyscallArg(tc, 1));
1012
1013 switch (resource) {
1014 case OS::TGT_RLIMIT_STACK:
1015 // max stack size in bytes: make up a number (8MB for now)
1016 rlp->rlim_cur = rlp->rlim_max = 8 * 1024 * 1024;
1017 rlp->rlim_cur = htog(rlp->rlim_cur);
1018 rlp->rlim_max = htog(rlp->rlim_max);
1019 break;
1020
1021 case OS::TGT_RLIMIT_DATA:
1022 // max data segment size in bytes: make up a number
1023 rlp->rlim_cur = rlp->rlim_max = 256 * 1024 * 1024;
1024 rlp->rlim_cur = htog(rlp->rlim_cur);
1025 rlp->rlim_max = htog(rlp->rlim_max);
1026 break;
1027
1028 default:
1029 std::cerr << "getrlimitFunc: unimplemented resource " << resource
1030 << std::endl;
1031 abort();
1032 break;
1033 }
1034
1035 rlp.copyOut(tc->getMemPort());
1036 return 0;
1037}
1038
1039/// Target gettimeofday() handler.
1040template <class OS>
1041SyscallReturn
1042gettimeofdayFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1043 ThreadContext *tc)
1044{
1045 TypedBufferArg<typename OS::timeval> tp(process->getSyscallArg(tc, 0));
1046
1047 getElapsedTime(tp->tv_sec, tp->tv_usec);
1048 tp->tv_sec += seconds_since_epoch;
1049 tp->tv_sec = TheISA::htog(tp->tv_sec);
1050 tp->tv_usec = TheISA::htog(tp->tv_usec);
1051
1052 tp.copyOut(tc->getMemPort());
1053
1054 return 0;
1055}
1056
1057
1058/// Target utimes() handler.
1059template <class OS>
1060SyscallReturn
1061utimesFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1062 ThreadContext *tc)
1063{
1064 std::string path;
1065
1066 if (!tc->getMemPort()->tryReadString(path, process->getSyscallArg(tc, 0)))
1067 return -EFAULT;
1068
1069 TypedBufferArg<typename OS::timeval [2]> tp(process->getSyscallArg(tc, 1));
1070 tp.copyIn(tc->getMemPort());
1071
1072 struct timeval hostTimeval[2];
1073 for (int i = 0; i < 2; ++i)
1074 {
1075 hostTimeval[i].tv_sec = gtoh((*tp)[i].tv_sec);
1076 hostTimeval[i].tv_usec = gtoh((*tp)[i].tv_usec);
1077 }
1078
1079 // Adjust path for current working directory
1080 path = process->fullPath(path);
1081
1082 int result = utimes(path.c_str(), hostTimeval);
1083
1084 if (result < 0)
1085 return -errno;
1086
1087 return 0;
1088}
1089/// Target getrusage() function.
1090template <class OS>
1091SyscallReturn
1092getrusageFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1093 ThreadContext *tc)
1094{
1095 int who = process->getSyscallArg(tc, 0); // THREAD, SELF, or CHILDREN
1096 TypedBufferArg<typename OS::rusage> rup(process->getSyscallArg(tc, 1));
1097
1098 rup->ru_utime.tv_sec = 0;
1099 rup->ru_utime.tv_usec = 0;
1100 rup->ru_stime.tv_sec = 0;
1101 rup->ru_stime.tv_usec = 0;
1102 rup->ru_maxrss = 0;
1103 rup->ru_ixrss = 0;
1104 rup->ru_idrss = 0;
1105 rup->ru_isrss = 0;
1106 rup->ru_minflt = 0;
1107 rup->ru_majflt = 0;
1108 rup->ru_nswap = 0;
1109 rup->ru_inblock = 0;
1110 rup->ru_oublock = 0;
1111 rup->ru_msgsnd = 0;
1112 rup->ru_msgrcv = 0;
1113 rup->ru_nsignals = 0;
1114 rup->ru_nvcsw = 0;
1115 rup->ru_nivcsw = 0;
1116
1117 switch (who) {
1118 case OS::TGT_RUSAGE_SELF:
1119 getElapsedTime(rup->ru_utime.tv_sec, rup->ru_utime.tv_usec);
1120 rup->ru_utime.tv_sec = htog(rup->ru_utime.tv_sec);
1121 rup->ru_utime.tv_usec = htog(rup->ru_utime.tv_usec);
1122 break;
1123
1124 case OS::TGT_RUSAGE_CHILDREN:
1125 // do nothing. We have no child processes, so they take no time.
1126 break;
1127
1128 default:
1129 // don't really handle THREAD or CHILDREN, but just warn and
1130 // plow ahead
1131 warn("getrusage() only supports RUSAGE_SELF. Parameter %d ignored.",
1132 who);
1133 }
1134
1135 rup.copyOut(tc->getMemPort());
1136
1137 return 0;
1138}
1139
1140/// Target times() function.
1141template <class OS>
1142SyscallReturn
1143timesFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1144 ThreadContext *tc)
1145{
1146 TypedBufferArg<typename OS::tms> bufp(process->getSyscallArg(tc, 0));
1147
1148 // Fill in the time structure (in clocks)
1149 int64_t clocks = curTick * OS::_SC_CLK_TCK / Clock::Int::s;
1150 bufp->tms_utime = clocks;
1151 bufp->tms_stime = 0;
1152 bufp->tms_cutime = 0;
1153 bufp->tms_cstime = 0;
1154
1155 // Convert to host endianness
1156 bufp->tms_utime = htog(bufp->tms_utime);
1157
1158 // Write back
1159 bufp.copyOut(tc->getMemPort());
1160
1161 // Return clock ticks since system boot
1162 return clocks;
1163}
1164
1165/// Target time() function.
1166template <class OS>
1167SyscallReturn
1168timeFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
1169 ThreadContext *tc)
1170{
1171 typename OS::time_t sec, usec;
1172 getElapsedTime(sec, usec);
1173 sec += seconds_since_epoch;
1174
1175 Addr taddr = (Addr)process->getSyscallArg(tc, 0);
1176 if(taddr != 0) {
1177 typename OS::time_t t = sec;
1178 t = htog(t);
1179 TranslatingPort *p = tc->getMemPort();
1180 p->writeBlob(taddr, (uint8_t*)&t, (int)sizeof(typename OS::time_t));
1181 }
1182 return sec;
1183}
1184
1185
1186#endif // __SIM_SYSCALL_EMUL_HH__
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