2003-12-02 04:34:38 +01:00
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/*
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2004-06-08 19:37:27 +02:00
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* Copyright (c) 2003-2004 The Regents of The University of Michigan
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2003-12-02 04:34:38 +01:00
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <unistd.h>
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#include <string>
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#include <iostream>
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#include "sim/syscall_emul.hh"
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#include "base/trace.hh"
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#include "cpu/exec_context.hh"
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#include "cpu/base_cpu.hh"
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#include "sim/process.hh"
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#include "sim/sim_events.hh"
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using namespace std;
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void
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SyscallDesc::doSyscall(int callnum, Process *process, ExecContext *xc)
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{
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DPRINTFR(SyscallVerbose, "%s: syscall %s called\n",
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xc->cpu->name(), name);
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2005-03-09 21:52:10 +01:00
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SyscallReturn retval = (*funcPtr)(this, callnum, process, xc);
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2003-12-02 04:34:38 +01:00
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DPRINTFR(SyscallVerbose, "%s: syscall %s returns %d\n",
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2005-03-09 21:52:10 +01:00
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xc->cpu->name(), name, retval.value());
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2003-12-02 04:34:38 +01:00
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2005-03-09 21:52:10 +01:00
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if (!(flags & SyscallDesc::SuppressReturnValue))
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2003-12-02 04:34:38 +01:00
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xc->setSyscallReturn(retval);
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}
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2005-03-09 21:52:10 +01:00
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SyscallReturn
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2003-12-02 04:34:38 +01:00
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unimplementedFunc(SyscallDesc *desc, int callnum, Process *process,
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ExecContext *xc)
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{
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cerr << "Error: syscall " << desc->name
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<< " (#" << callnum << ") unimplemented.";
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cerr << " Args: " << xc->getSyscallArg(0) << ", " << xc->getSyscallArg(1)
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<< ", ..." << endl;
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abort();
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}
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2005-03-09 21:52:10 +01:00
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SyscallReturn
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2003-12-02 04:34:38 +01:00
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ignoreFunc(SyscallDesc *desc, int callnum, Process *process,
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ExecContext *xc)
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{
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DCOUT(SyscallWarnings) << "Warning: ignoring syscall " << desc->name
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<< "(" << xc->getSyscallArg(0)
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<< ", " << xc->getSyscallArg(1)
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<< ", ...)" << endl;
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2005-03-09 21:52:10 +01:00
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return SyscallReturn(0);
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2003-12-02 04:34:38 +01:00
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}
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2005-03-09 21:52:10 +01:00
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SyscallReturn
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2003-12-02 04:34:38 +01:00
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exitFunc(SyscallDesc *desc, int callnum, Process *process,
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ExecContext *xc)
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{
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new SimExitEvent("syscall caused exit", xc->getSyscallArg(0) & 0xff);
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2005-03-09 21:52:10 +01:00
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return SyscallReturn(1);
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2003-12-02 04:34:38 +01:00
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}
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2005-03-09 21:52:10 +01:00
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SyscallReturn
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2003-12-02 04:34:38 +01:00
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getpagesizeFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
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{
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2005-03-09 21:52:10 +01:00
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return SyscallReturn(VMPageSize);
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2003-12-02 04:34:38 +01:00
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}
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2005-03-09 21:52:10 +01:00
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SyscallReturn
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2003-12-02 04:34:38 +01:00
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obreakFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
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{
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// change brk addr to first arg
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2004-02-11 06:43:57 +01:00
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Addr new_brk = xc->getSyscallArg(0);
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if (new_brk != 0)
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2005-03-09 21:52:10 +01:00
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{
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2004-02-11 06:43:57 +01:00
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p->brk_point = xc->getSyscallArg(0);
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2005-03-09 21:52:10 +01:00
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}
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return SyscallReturn(p->brk_point);
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2003-12-02 04:34:38 +01:00
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}
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2005-03-09 21:52:10 +01:00
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SyscallReturn
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2003-12-02 04:34:38 +01:00
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closeFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
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{
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int fd = p->sim_fd(xc->getSyscallArg(0));
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2005-03-09 21:52:10 +01:00
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return SyscallReturn(close(fd));
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2003-12-02 04:34:38 +01:00
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}
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2005-03-09 21:52:10 +01:00
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SyscallReturn
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2003-12-02 04:34:38 +01:00
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readFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
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{
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int fd = p->sim_fd(xc->getSyscallArg(0));
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int nbytes = xc->getSyscallArg(2);
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BufferArg bufArg(xc->getSyscallArg(1), nbytes);
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int bytes_read = read(fd, bufArg.bufferPtr(), nbytes);
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if (bytes_read != -1)
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bufArg.copyOut(xc->mem);
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2005-03-09 21:52:10 +01:00
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return SyscallReturn(bytes_read);
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2003-12-02 04:34:38 +01:00
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}
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2005-03-09 21:52:10 +01:00
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SyscallReturn
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2003-12-02 04:34:38 +01:00
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writeFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
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{
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int fd = p->sim_fd(xc->getSyscallArg(0));
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int nbytes = xc->getSyscallArg(2);
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BufferArg bufArg(xc->getSyscallArg(1), nbytes);
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bufArg.copyIn(xc->mem);
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int bytes_written = write(fd, bufArg.bufferPtr(), nbytes);
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fsync(fd);
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2005-03-09 21:52:10 +01:00
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return SyscallReturn(bytes_written);
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2003-12-02 04:34:38 +01:00
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}
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2005-03-09 21:52:10 +01:00
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SyscallReturn
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2003-12-02 04:34:38 +01:00
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lseekFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
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{
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int fd = p->sim_fd(xc->getSyscallArg(0));
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uint64_t offs = xc->getSyscallArg(1);
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int whence = xc->getSyscallArg(2);
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off_t result = lseek(fd, offs, whence);
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2005-03-09 21:52:10 +01:00
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return (result == (off_t)-1) ? SyscallReturn(-errno) :
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SyscallReturn(result);
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2003-12-02 04:34:38 +01:00
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}
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2005-03-09 21:52:10 +01:00
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SyscallReturn
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2003-12-02 04:34:38 +01:00
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munmapFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
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{
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// given that we don't really implement mmap, munmap is really easy
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2005-03-09 21:52:10 +01:00
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return SyscallReturn(0);
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2003-12-02 04:34:38 +01:00
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}
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const char *hostname = "m5.eecs.umich.edu";
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2005-03-09 21:52:10 +01:00
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SyscallReturn
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2003-12-02 04:34:38 +01:00
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gethostnameFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
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{
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int name_len = xc->getSyscallArg(1);
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BufferArg name(xc->getSyscallArg(0), name_len);
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strncpy((char *)name.bufferPtr(), hostname, name_len);
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name.copyOut(xc->mem);
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2005-03-09 21:52:10 +01:00
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return SyscallReturn(0);
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2003-12-02 04:34:38 +01:00
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}
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2005-03-09 21:52:10 +01:00
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SyscallReturn
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2004-02-05 18:16:17 +01:00
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unlinkFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
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{
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std::string path;
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if (xc->mem->readString(path, xc->getSyscallArg(0)) != No_Fault)
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2005-03-09 21:52:10 +01:00
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return (TheISA::IntReg)-EFAULT;
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2004-02-05 18:16:17 +01:00
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int result = unlink(path.c_str());
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2005-03-09 21:52:10 +01:00
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return (result == -1) ? SyscallReturn(-errno) : SyscallReturn(result);
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2004-02-05 18:16:17 +01:00
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}
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2005-03-09 21:52:10 +01:00
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SyscallReturn
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2004-02-05 18:16:17 +01:00
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renameFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
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{
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std::string old_name;
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if (xc->mem->readString(old_name, xc->getSyscallArg(0)) != No_Fault)
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2005-03-09 21:52:10 +01:00
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return SyscallReturn(-EFAULT);
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2004-02-05 18:16:17 +01:00
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std::string new_name;
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if (xc->mem->readString(new_name, xc->getSyscallArg(1)) != No_Fault)
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2005-03-09 21:52:10 +01:00
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return SyscallReturn(-EFAULT);
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2004-02-05 18:16:17 +01:00
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2005-03-09 21:52:10 +01:00
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int64_t result = rename(old_name.c_str(),new_name.c_str());
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return (result == -1) ? SyscallReturn(-errno) : SyscallReturn(result);
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2004-02-05 18:16:17 +01:00
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}
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2003-12-02 04:34:38 +01:00
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