gem5/sim/syscall_emul.cc
Steve Reinhardt 9984b2bd6c Formatting & doxygen docs for new syscall emulation code.
arch/alpha/alpha_linux_process.cc:
arch/alpha/alpha_linux_process.hh:
arch/alpha/alpha_tru64_process.cc:
arch/alpha/alpha_tru64_process.hh:
sim/syscall_emul.cc:
sim/syscall_emul.hh:
    Formatting & doxygen.

--HG--
extra : convert_revision : 4f07dd37e254120800dd0d5c0eb47acc9c00cb3f
2003-12-01 22:39:27 -08:00

188 lines
5 KiB
C++

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