| /* |
| * 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; |
| } |