syscall_emul.cc (10931:42d846318962) syscall_emul.cc (10932:cafae9abd4e4)
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;

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207
208
209SyscallReturn
210closeFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
211{
212 int index = 0;
213 int tgt_fd = p->getSyscallArg(tc, index);
214
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;

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207
208
209SyscallReturn
210closeFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
211{
212 int index = 0;
213 int tgt_fd = p->getSyscallArg(tc, index);
214
215 int sim_fd = p->sim_fd(tgt_fd);
215 int sim_fd = p->getSimFD(tgt_fd);
216 if (sim_fd < 0)
217 return -EBADF;
218
219 int status = 0;
220 if (sim_fd > 2)
221 status = close(sim_fd);
222 if (status >= 0)
216 if (sim_fd < 0)
217 return -EBADF;
218
219 int status = 0;
220 if (sim_fd > 2)
221 status = close(sim_fd);
222 if (status >= 0)
223 p->reset_fd_entry(tgt_fd);
223 p->resetFDEntry(tgt_fd);
224 return status;
225}
226
227
228SyscallReturn
229readFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
230{
231 int index = 0;
232 int tgt_fd = p->getSyscallArg(tc, index);
233 Addr bufPtr = p->getSyscallArg(tc, index);
234 int nbytes = p->getSyscallArg(tc, index);
235 BufferArg bufArg(bufPtr, nbytes);
236
224 return status;
225}
226
227
228SyscallReturn
229readFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
230{
231 int index = 0;
232 int tgt_fd = p->getSyscallArg(tc, index);
233 Addr bufPtr = p->getSyscallArg(tc, index);
234 int nbytes = p->getSyscallArg(tc, index);
235 BufferArg bufArg(bufPtr, nbytes);
236
237 int sim_fd = p->sim_fd(tgt_fd);
237 int sim_fd = p->getSimFD(tgt_fd);
238 if (sim_fd < 0)
239 return -EBADF;
240
241 int bytes_read = read(sim_fd, bufArg.bufferPtr(), nbytes);
242
243 if (bytes_read != -1)
244 bufArg.copyOut(tc->getMemProxy());
245

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250writeFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
251{
252 int index = 0;
253 int tgt_fd = p->getSyscallArg(tc, index);
254 Addr bufPtr = p->getSyscallArg(tc, index);
255 int nbytes = p->getSyscallArg(tc, index);
256 BufferArg bufArg(bufPtr, nbytes);
257
238 if (sim_fd < 0)
239 return -EBADF;
240
241 int bytes_read = read(sim_fd, bufArg.bufferPtr(), nbytes);
242
243 if (bytes_read != -1)
244 bufArg.copyOut(tc->getMemProxy());
245

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250writeFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
251{
252 int index = 0;
253 int tgt_fd = p->getSyscallArg(tc, index);
254 Addr bufPtr = p->getSyscallArg(tc, index);
255 int nbytes = p->getSyscallArg(tc, index);
256 BufferArg bufArg(bufPtr, nbytes);
257
258 int sim_fd = p->sim_fd(tgt_fd);
258 int sim_fd = p->getSimFD(tgt_fd);
259 if (sim_fd < 0)
260 return -EBADF;
261
262 bufArg.copyIn(tc->getMemProxy());
263
264 int bytes_written = write(sim_fd, bufArg.bufferPtr(), nbytes);
265
266 fsync(sim_fd);

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272SyscallReturn
273lseekFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
274{
275 int index = 0;
276 int tgt_fd = p->getSyscallArg(tc, index);
277 uint64_t offs = p->getSyscallArg(tc, index);
278 int whence = p->getSyscallArg(tc, index);
279
259 if (sim_fd < 0)
260 return -EBADF;
261
262 bufArg.copyIn(tc->getMemProxy());
263
264 int bytes_written = write(sim_fd, bufArg.bufferPtr(), nbytes);
265
266 fsync(sim_fd);

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272SyscallReturn
273lseekFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
274{
275 int index = 0;
276 int tgt_fd = p->getSyscallArg(tc, index);
277 uint64_t offs = p->getSyscallArg(tc, index);
278 int whence = p->getSyscallArg(tc, index);
279
280 int sim_fd = p->sim_fd(tgt_fd);
280 int sim_fd = p->getSimFD(tgt_fd);
281 if (sim_fd < 0)
282 return -EBADF;
283
284 off_t result = lseek(sim_fd, offs, whence);
285
286 return (result == (off_t)-1) ? -errno : result;
287}
288
289
290SyscallReturn
291_llseekFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
292{
293 int index = 0;
294 int tgt_fd = p->getSyscallArg(tc, index);
295 uint64_t offset_high = p->getSyscallArg(tc, index);
296 uint32_t offset_low = p->getSyscallArg(tc, index);
297 Addr result_ptr = p->getSyscallArg(tc, index);
298 int whence = p->getSyscallArg(tc, index);
299
281 if (sim_fd < 0)
282 return -EBADF;
283
284 off_t result = lseek(sim_fd, offs, whence);
285
286 return (result == (off_t)-1) ? -errno : result;
287}
288
289
290SyscallReturn
291_llseekFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
292{
293 int index = 0;
294 int tgt_fd = p->getSyscallArg(tc, index);
295 uint64_t offset_high = p->getSyscallArg(tc, index);
296 uint32_t offset_low = p->getSyscallArg(tc, index);
297 Addr result_ptr = p->getSyscallArg(tc, index);
298 int whence = p->getSyscallArg(tc, index);
299
300 int sim_fd = p->sim_fd(tgt_fd);
300 int sim_fd = p->getSimFD(tgt_fd);
301 if (sim_fd < 0)
302 return -EBADF;
303
304 uint64_t offset = (offset_high << 32) | offset_low;
305
306 uint64_t result = lseek(sim_fd, offset, whence);
307 result = TheISA::htog(result);
308

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496SyscallReturn
497ftruncateFunc(SyscallDesc *desc, int num,
498 LiveProcess *process, ThreadContext *tc)
499{
500 int index = 0;
501 int tgt_fd = process->getSyscallArg(tc, index);
502 off_t length = process->getSyscallArg(tc, index);
503
301 if (sim_fd < 0)
302 return -EBADF;
303
304 uint64_t offset = (offset_high << 32) | offset_low;
305
306 uint64_t result = lseek(sim_fd, offset, whence);
307 result = TheISA::htog(result);
308

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496SyscallReturn
497ftruncateFunc(SyscallDesc *desc, int num,
498 LiveProcess *process, ThreadContext *tc)
499{
500 int index = 0;
501 int tgt_fd = process->getSyscallArg(tc, index);
502 off_t length = process->getSyscallArg(tc, index);
503
504 int sim_fd = process->sim_fd(tgt_fd);
504 int sim_fd = process->getSimFD(tgt_fd);
505 if (sim_fd < 0)
506 return -EBADF;
507
508 int result = ftruncate(sim_fd, length);
509 return (result == -1) ? -errno : result;
510}
511
512SyscallReturn

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535SyscallReturn
536ftruncate64Func(SyscallDesc *desc, int num,
537 LiveProcess *process, ThreadContext *tc)
538{
539 int index = 0;
540 int tgt_fd = process->getSyscallArg(tc, index);
541 int64_t length = process->getSyscallArg(tc, index, 64);
542
505 if (sim_fd < 0)
506 return -EBADF;
507
508 int result = ftruncate(sim_fd, length);
509 return (result == -1) ? -errno : result;
510}
511
512SyscallReturn

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535SyscallReturn
536ftruncate64Func(SyscallDesc *desc, int num,
537 LiveProcess *process, ThreadContext *tc)
538{
539 int index = 0;
540 int tgt_fd = process->getSyscallArg(tc, index);
541 int64_t length = process->getSyscallArg(tc, index, 64);
542
543 int sim_fd = process->sim_fd(tgt_fd);
543 int sim_fd = process->getSimFD(tgt_fd);
544 if (sim_fd < 0)
545 return -EBADF;
546
547#if NO_STAT64
548 int result = ftruncate(sim_fd, length);
549#else
550 int result = ftruncate64(sim_fd, length);
551#endif

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586}
587
588SyscallReturn
589fchownFunc(SyscallDesc *desc, int num, LiveProcess *process, ThreadContext *tc)
590{
591 int index = 0;
592 int tgt_fd = process->getSyscallArg(tc, index);
593
544 if (sim_fd < 0)
545 return -EBADF;
546
547#if NO_STAT64
548 int result = ftruncate(sim_fd, length);
549#else
550 int result = ftruncate64(sim_fd, length);
551#endif

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586}
587
588SyscallReturn
589fchownFunc(SyscallDesc *desc, int num, LiveProcess *process, ThreadContext *tc)
590{
591 int index = 0;
592 int tgt_fd = process->getSyscallArg(tc, index);
593
594 int sim_fd = process->sim_fd(tgt_fd);
594 int sim_fd = process->getSimFD(tgt_fd);
595 if (sim_fd < 0)
596 return -EBADF;
597
598 /* XXX endianess */
599 uint32_t owner = process->getSyscallArg(tc, index);
600 uid_t hostOwner = owner;
601 uint32_t group = process->getSyscallArg(tc, index);
602 gid_t hostGroup = group;

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607
608
609SyscallReturn
610dupFunc(SyscallDesc *desc, int num, LiveProcess *process, ThreadContext *tc)
611{
612 int index = 0;
613 int tgt_fd = process->getSyscallArg(tc, index);
614
595 if (sim_fd < 0)
596 return -EBADF;
597
598 /* XXX endianess */
599 uint32_t owner = process->getSyscallArg(tc, index);
600 uid_t hostOwner = owner;
601 uint32_t group = process->getSyscallArg(tc, index);
602 gid_t hostGroup = group;

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607
608
609SyscallReturn
610dupFunc(SyscallDesc *desc, int num, LiveProcess *process, ThreadContext *tc)
611{
612 int index = 0;
613 int tgt_fd = process->getSyscallArg(tc, index);
614
615 int sim_fd = process->sim_fd(tgt_fd);
615 int sim_fd = process->getSimFD(tgt_fd);
616 if (sim_fd < 0)
617 return -EBADF;
618
616 if (sim_fd < 0)
617 return -EBADF;
618
619 FDEntry *fde = process->get_fd_entry(tgt_fd);
619 FDEntry *fde = process->getFDEntry(tgt_fd);
620
621 int result = dup(sim_fd);
622 return (result == -1) ? -errno :
620
621 int result = dup(sim_fd);
622 return (result == -1) ? -errno :
623 process->alloc_fd(result, fde->filename, fde->flags, fde->mode, false);
623 process->allocFD(result, fde->filename, fde->flags, fde->mode, false);
624}
625
626
627SyscallReturn
628fcntlFunc(SyscallDesc *desc, int num, LiveProcess *process,
629 ThreadContext *tc)
630{
631 int index = 0;
632 int tgt_fd = process->getSyscallArg(tc, index);
633
624}
625
626
627SyscallReturn
628fcntlFunc(SyscallDesc *desc, int num, LiveProcess *process,
629 ThreadContext *tc)
630{
631 int index = 0;
632 int tgt_fd = process->getSyscallArg(tc, index);
633
634 int sim_fd = process->sim_fd(tgt_fd);
634 int sim_fd = process->getSimFD(tgt_fd);
635 if (sim_fd < 0)
636 return -EBADF;
637
638 int cmd = process->getSyscallArg(tc, index);
639 switch (cmd) {
640 case 0: // F_DUPFD
641 // if we really wanted to support this, we'd need to do it
642 // in the target fd space.

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670
671SyscallReturn
672fcntl64Func(SyscallDesc *desc, int num, LiveProcess *process,
673 ThreadContext *tc)
674{
675 int index = 0;
676 int tgt_fd = process->getSyscallArg(tc, index);
677
635 if (sim_fd < 0)
636 return -EBADF;
637
638 int cmd = process->getSyscallArg(tc, index);
639 switch (cmd) {
640 case 0: // F_DUPFD
641 // if we really wanted to support this, we'd need to do it
642 // in the target fd space.

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670
671SyscallReturn
672fcntl64Func(SyscallDesc *desc, int num, LiveProcess *process,
673 ThreadContext *tc)
674{
675 int index = 0;
676 int tgt_fd = process->getSyscallArg(tc, index);
677
678 int sim_fd = process->sim_fd(tgt_fd);
678 int sim_fd = process->getSimFD(tgt_fd);
679 if (sim_fd < 0)
680 return -EBADF;
681
682 int cmd = process->getSyscallArg(tc, index);
683 switch (cmd) {
684 case 33: //F_GETLK64
685 warn("fcntl64(%d, F_GETLK64) not supported, error returned\n", tgt_fd);
686 return -EMFILE;

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707 int fds[2], sim_fds[2];
708 int pipe_retval = pipe(fds);
709
710 if (pipe_retval < 0) {
711 // error
712 return pipe_retval;
713 }
714
679 if (sim_fd < 0)
680 return -EBADF;
681
682 int cmd = process->getSyscallArg(tc, index);
683 switch (cmd) {
684 case 33: //F_GETLK64
685 warn("fcntl64(%d, F_GETLK64) not supported, error returned\n", tgt_fd);
686 return -EMFILE;

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707 int fds[2], sim_fds[2];
708 int pipe_retval = pipe(fds);
709
710 if (pipe_retval < 0) {
711 // error
712 return pipe_retval;
713 }
714
715 sim_fds[0] = process->alloc_fd(fds[0], "PIPE-READ", O_WRONLY, -1, true);
716 sim_fds[1] = process->alloc_fd(fds[1], "PIPE-WRITE", O_RDONLY, -1, true);
715 sim_fds[0] = process->allocFD(fds[0], "PIPE-READ", O_WRONLY, -1, true);
716 sim_fds[1] = process->allocFD(fds[1], "PIPE-WRITE", O_RDONLY, -1, true);
717
718 process->setReadPipeSource(sim_fds[0], sim_fds[1]);
719 // Alpha Linux convention for pipe() is that fd[0] is returned as
720 // the return value of the function, and fd[1] is returned in r20.
721 tc->setIntReg(SyscallPseudoReturnReg, sim_fds[1]);
722 return sim_fds[0];
723}
724

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718 process->setReadPipeSource(sim_fds[0], sim_fds[1]);
719 // Alpha Linux convention for pipe() is that fd[0] is returned as
720 // the return value of the function, and fd[1] is returned in r20.
721 tc->setIntReg(SyscallPseudoReturnReg, sim_fds[1]);
722 return sim_fds[0];
723}
724

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