gem5/sim/syscall_emul.cc
Nathan Binkert 13c005a8af shuffle files around for new directory structure
--HG--
rename : cpu/base_cpu.cc => cpu/base.cc
rename : cpu/base_cpu.hh => cpu/base.hh
rename : cpu/beta_cpu/2bit_local_pred.cc => cpu/o3/2bit_local_pred.cc
rename : cpu/beta_cpu/2bit_local_pred.hh => cpu/o3/2bit_local_pred.hh
rename : cpu/beta_cpu/alpha_full_cpu.cc => cpu/o3/alpha_cpu.cc
rename : cpu/beta_cpu/alpha_full_cpu.hh => cpu/o3/alpha_cpu.hh
rename : cpu/beta_cpu/alpha_full_cpu_builder.cc => cpu/o3/alpha_cpu_builder.cc
rename : cpu/beta_cpu/alpha_full_cpu_impl.hh => cpu/o3/alpha_cpu_impl.hh
rename : cpu/beta_cpu/alpha_dyn_inst.cc => cpu/o3/alpha_dyn_inst.cc
rename : cpu/beta_cpu/alpha_dyn_inst.hh => cpu/o3/alpha_dyn_inst.hh
rename : cpu/beta_cpu/alpha_dyn_inst_impl.hh => cpu/o3/alpha_dyn_inst_impl.hh
rename : cpu/beta_cpu/alpha_impl.hh => cpu/o3/alpha_impl.hh
rename : cpu/beta_cpu/alpha_params.hh => cpu/o3/alpha_params.hh
rename : cpu/beta_cpu/bpred_unit.cc => cpu/o3/bpred_unit.cc
rename : cpu/beta_cpu/bpred_unit.hh => cpu/o3/bpred_unit.hh
rename : cpu/beta_cpu/bpred_unit_impl.hh => cpu/o3/bpred_unit_impl.hh
rename : cpu/beta_cpu/btb.cc => cpu/o3/btb.cc
rename : cpu/beta_cpu/btb.hh => cpu/o3/btb.hh
rename : cpu/beta_cpu/comm.hh => cpu/o3/comm.hh
rename : cpu/beta_cpu/commit.cc => cpu/o3/commit.cc
rename : cpu/beta_cpu/commit.hh => cpu/o3/commit.hh
rename : cpu/beta_cpu/commit_impl.hh => cpu/o3/commit_impl.hh
rename : cpu/beta_cpu/full_cpu.cc => cpu/o3/cpu.cc
rename : cpu/beta_cpu/full_cpu.hh => cpu/o3/cpu.hh
rename : cpu/beta_cpu/cpu_policy.hh => cpu/o3/cpu_policy.hh
rename : cpu/beta_cpu/decode.cc => cpu/o3/decode.cc
rename : cpu/beta_cpu/decode.hh => cpu/o3/decode.hh
rename : cpu/beta_cpu/decode_impl.hh => cpu/o3/decode_impl.hh
rename : cpu/beta_cpu/fetch.cc => cpu/o3/fetch.cc
rename : cpu/beta_cpu/fetch.hh => cpu/o3/fetch.hh
rename : cpu/beta_cpu/fetch_impl.hh => cpu/o3/fetch_impl.hh
rename : cpu/beta_cpu/free_list.cc => cpu/o3/free_list.cc
rename : cpu/beta_cpu/free_list.hh => cpu/o3/free_list.hh
rename : cpu/beta_cpu/iew.cc => cpu/o3/iew.cc
rename : cpu/beta_cpu/iew.hh => cpu/o3/iew.hh
rename : cpu/beta_cpu/iew_impl.hh => cpu/o3/iew_impl.hh
rename : cpu/beta_cpu/inst_queue.cc => cpu/o3/inst_queue.cc
rename : cpu/beta_cpu/inst_queue.hh => cpu/o3/inst_queue.hh
rename : cpu/beta_cpu/inst_queue_impl.hh => cpu/o3/inst_queue_impl.hh
rename : cpu/beta_cpu/mem_dep_unit.cc => cpu/o3/mem_dep_unit.cc
rename : cpu/beta_cpu/mem_dep_unit.hh => cpu/o3/mem_dep_unit.hh
rename : cpu/beta_cpu/mem_dep_unit_impl.hh => cpu/o3/mem_dep_unit_impl.hh
rename : cpu/beta_cpu/ras.cc => cpu/o3/ras.cc
rename : cpu/beta_cpu/ras.hh => cpu/o3/ras.hh
rename : cpu/beta_cpu/regfile.hh => cpu/o3/regfile.hh
rename : cpu/beta_cpu/rename.cc => cpu/o3/rename.cc
rename : cpu/beta_cpu/rename.hh => cpu/o3/rename.hh
rename : cpu/beta_cpu/rename_impl.hh => cpu/o3/rename_impl.hh
rename : cpu/beta_cpu/rename_map.cc => cpu/o3/rename_map.cc
rename : cpu/beta_cpu/rename_map.hh => cpu/o3/rename_map.hh
rename : cpu/beta_cpu/rob.cc => cpu/o3/rob.cc
rename : cpu/beta_cpu/rob.hh => cpu/o3/rob.hh
rename : cpu/beta_cpu/rob_impl.hh => cpu/o3/rob_impl.hh
rename : cpu/beta_cpu/sat_counter.cc => cpu/o3/sat_counter.cc
rename : cpu/beta_cpu/sat_counter.hh => cpu/o3/sat_counter.hh
rename : cpu/beta_cpu/store_set.cc => cpu/o3/store_set.cc
rename : cpu/beta_cpu/store_set.hh => cpu/o3/store_set.hh
rename : cpu/beta_cpu/tournament_pred.cc => cpu/o3/tournament_pred.cc
rename : cpu/beta_cpu/tournament_pred.hh => cpu/o3/tournament_pred.hh
rename : cpu/ooo_cpu/ooo_cpu.cc => cpu/ozone/cpu.cc
rename : cpu/ooo_cpu/ooo_cpu.hh => cpu/ozone/cpu.hh
rename : cpu/ooo_cpu/ooo_impl.hh => cpu/ozone/cpu_impl.hh
rename : cpu/ooo_cpu/ea_list.cc => cpu/ozone/ea_list.cc
rename : cpu/ooo_cpu/ea_list.hh => cpu/ozone/ea_list.hh
rename : cpu/simple_cpu/simple_cpu.cc => cpu/simple/cpu.cc
rename : cpu/simple_cpu/simple_cpu.hh => cpu/simple/cpu.hh
rename : cpu/full_cpu/smt.hh => cpu/smt.hh
rename : cpu/full_cpu/op_class.hh => encumbered/cpu/full/op_class.hh
extra : convert_revision : c4a891d8d6d3e0e9e5ea56be47d851da44d8c032
2005-06-04 20:50:10 -04:00

248 lines
6.6 KiB
C++

/*
* Copyright (c) 2003-2005 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.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);
SyscallReturn retval = (*funcPtr)(this, callnum, process, xc);
DPRINTFR(SyscallVerbose, "%s: syscall %s returns %d\n",
xc->cpu->name(), name, retval.value());
if (!(flags & SyscallDesc::SuppressReturnValue))
xc->setSyscallReturn(retval);
}
SyscallReturn
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();
}
SyscallReturn
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;
}
SyscallReturn
exitFunc(SyscallDesc *desc, int callnum, Process *process,
ExecContext *xc)
{
new SimExitEvent("syscall caused exit", xc->getSyscallArg(0) & 0xff);
return 1;
}
SyscallReturn
getpagesizeFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
{
return VMPageSize;
}
SyscallReturn
obreakFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
{
// change brk addr to first arg
Addr new_brk = xc->getSyscallArg(0);
if (new_brk != 0)
{
p->brk_point = xc->getSyscallArg(0);
}
DPRINTF(SyscallVerbose, "Break Point changed to: %#X\n", p->brk_point);
return p->brk_point;
}
SyscallReturn
closeFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
{
int fd = p->sim_fd(xc->getSyscallArg(0));
return close(fd);
}
SyscallReturn
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;
}
SyscallReturn
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;
}
SyscallReturn
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;
}
SyscallReturn
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";
SyscallReturn
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;
}
SyscallReturn
unlinkFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
{
string path;
if (xc->mem->readString(path, xc->getSyscallArg(0)) != No_Fault)
return (TheISA::IntReg)-EFAULT;
int result = unlink(path.c_str());
return (result == -1) ? -errno : result;
}
SyscallReturn
renameFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
{
string old_name;
if (xc->mem->readString(old_name, xc->getSyscallArg(0)) != No_Fault)
return -EFAULT;
string new_name;
if (xc->mem->readString(new_name, xc->getSyscallArg(1)) != No_Fault)
return -EFAULT;
int64_t result = rename(old_name.c_str(), new_name.c_str());
return (result == -1) ? -errno : result;
}
SyscallReturn
truncateFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
{
string path;
if (xc->mem->readString(path, xc->getSyscallArg(0)) != No_Fault)
return -EFAULT;
off_t length = xc->getSyscallArg(1);
int result = truncate(path.c_str(), length);
return (result == -1) ? -errno : result;
}
SyscallReturn
ftruncateFunc(SyscallDesc *desc, int num, Process *process, ExecContext *xc)
{
int fd = process->sim_fd(xc->getSyscallArg(0));
if (fd < 0)
return -EBADF;
off_t length = xc->getSyscallArg(1);
int result = ftruncate(fd, length);
return (result == -1) ? -errno : result;
}