process.cc

来自「M5,一个功能强大的多处理器系统模拟器.很多针对处理器架构,性能的研究都使用它作」· CC 代码 · 共 476 行 · 第 1/2 页

/*
 * Copyright (c) 2005
 * The Regents of The University of Michigan
 * All Rights Reserved
 *
 * This code is part of the M5 simulator.
 *
 * Permission is granted to use, copy, create derivative works and
 * redistribute this software and such derivative works for any
 * purpose, so long as the copyright notice above, this grant of
 * permission, and the disclaimer below appear in all copies made; and
 * so long as the name of The University of Michigan is not used in
 * any advertising or publicity pertaining to the use or distribution
 * of this software without specific, written prior authorization.
 *
 * THIS SOFTWARE IS PROVIDED AS IS, WITHOUT REPRESENTATION FROM THE
 * UNIVERSITY OF MICHIGAN AS TO ITS FITNESS FOR ANY PURPOSE, AND
 * WITHOUT WARRANTY BY THE UNIVERSITY OF MICHIGAN OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE. THE REGENTS OF THE UNIVERSITY OF MICHIGAN SHALL NOT BE
 * LIABLE FOR ANY DAMAGES, INCLUDING DIRECT, SPECIAL, INDIRECT,
 * INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WITH RESPECT TO ANY CLAIM
 * ARISING OUT OF OR IN CONNECTION WITH THE USE OF THE SOFTWARE, EVEN
 * IF IT HAS BEEN OR IS HEREAFTER ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGES.
 *

 * Authors: Gabe Black
 *          Korey Sewell
 *
 */

/*
 * Copyright (c) 2007 MIPS Technologies, Inc.  All Rights Reserved
 *
 * This software is part of the M5 simulator.
 *
 * THIS IS A LEGAL AGREEMENT.  BY DOWNLOADING, USING, COPYING, CREATING
 * DERIVATIVE WORKS, AND/OR DISTRIBUTING THIS SOFTWARE YOU ARE AGREEING
 * TO THESE TERMS AND CONDITIONS.
 *
 * Permission is granted to use, copy, create derivative works and
 * distribute this software and such derivative works for any purpose,
 * so long as (1) the copyright notice above, this grant of permission,
 * and the disclaimer below appear in all copies and derivative works
 * made, (2) the copyright notice above is augmented as appropriate to
 * reflect the addition of any new copyrightable work in a derivative
 * work (e.g., Copyright (c) <Publication Year> Copyright Owner), and (3)
 * the name of MIPS Technologies, Inc. ($B!H(BMIPS$B!I(B) is not used in any
 * advertising or publicity pertaining to the use or distribution of
 * this software without specific, written prior authorization.
 *
 * THIS SOFTWARE IS PROVIDED $B!H(BAS IS.$B!I(B  MIPS MAKES NO WARRANTIES AND
 * DISCLAIMS ALL WARRANTIES, WHETHER EXPRESS, STATUTORY, IMPLIED OR
 * OTHERWISE, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
 * NON-INFRINGEMENT OF THIRD PARTY RIGHTS, REGARDING THIS SOFTWARE.
 * IN NO EVENT SHALL MIPS BE LIABLE FOR ANY DAMAGES, INCLUDING DIRECT,
 * INDIRECT, INCIDENTAL, CONSEQUENTIAL, SPECIAL, OR PUNITIVE DAMAGES OF
 * ANY KIND OR NATURE, ARISING OUT OF OR IN CONNECTION WITH THIS AGREEMENT,
 * THIS SOFTWARE AND/OR THE USE OF THIS SOFTWARE, WHETHER SUCH LIABILITY
 * IS ASSERTED ON THE BASIS OF CONTRACT, TORT (INCLUDING NEGLIGENCE OR
 * STRICT LIABILITY), OR OTHERWISE, EVEN IF MIPS HAS BEEN WARNED OF THE
 * POSSIBILITY OF ANY SUCH LOSS OR DAMAGE IN ADVANCE.
 *
 *
 * Authors: Korey L. Sewell
 */

#include "arch/mips/linux/linux.hh"
#include "arch/mips/linux/process.hh"
#include "arch/mips/isa_traits.hh"

#include "base/trace.hh"
#include "cpu/thread_context.hh"
#include "kern/linux/linux.hh"

#include "sim/process.hh"
#include "sim/system.hh"
#include "sim/syscall_emul.hh"
#include "sim/eventq.hh"

using namespace std;
using namespace MipsISA;

/// Target uname() handler.
static SyscallReturn
unameFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
          ThreadContext *tc)
{
    TypedBufferArg<Linux::utsname> name(tc->getSyscallArg(0));

    strcpy(name->sysname, "Linux");
    strcpy(name->nodename,"m5.eecs.umich.edu");
    strcpy(name->release, "2.4.20");
    strcpy(name->version, "#1 Mon Aug 18 11:32:15 EDT 2003");
    strcpy(name->machine, "mips");

    name.copyOut(tc->getMemPort());
    return 0;
}

/// Target sys_getsysyinfo() handler.  Even though this call is
/// borrowed from Tru64, the subcases that get used appear to be
/// different in practice from those used by Tru64 processes.
static SyscallReturn
sys_getsysinfoFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
                   ThreadContext *tc)
{
    unsigned op = tc->getSyscallArg(0);
    // unsigned nbytes = tc->getSyscallArg(2);

    switch (op) {

      case 45: { // GSI_IEEE_FP_CONTROL
          TypedBufferArg<uint64_t> fpcr(tc->getSyscallArg(1));
          // I don't think this exactly matches the HW FPCR
          *fpcr = 0;
          fpcr.copyOut(tc->getMemPort());
          return 0;
      }

      default:
        cerr << "sys_getsysinfo: unknown op " << op << endl;
        abort();
        break;
    }

    return 1;
}

/// Target sys_setsysinfo() handler.
static SyscallReturn
sys_setsysinfoFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
                   ThreadContext *tc)
{
    unsigned op = tc->getSyscallArg(0);
    // unsigned nbytes = tc->getSyscallArg(2);

    switch (op) {

      case 14: { // SSI_IEEE_FP_CONTROL
          TypedBufferArg<uint64_t> fpcr(tc->getSyscallArg(1));
          // I don't think this exactly matches the HW FPCR
          fpcr.copyIn(tc->getMemPort());
          DPRINTFR(SyscallVerbose, "sys_setsysinfo(SSI_IEEE_FP_CONTROL): "
                   " setting FPCR to 0x%x\n", gtoh(*(uint64_t*)fpcr));
          return 0;
      }

      default:
        cerr << "sys_setsysinfo: unknown op " << op << endl;
        abort();
        break;
    }

    return 1;
}

SyscallDesc MipsLinuxProcess::syscallDescs[] = {
    /*  0 */ SyscallDesc("syscall", unimplementedFunc),
    /*  1 */ SyscallDesc("exit", exitFunc),
    /*  2 */ SyscallDesc("fork", unimplementedFunc),
    /*  3 */ SyscallDesc("read", readFunc),
    /*  4 */ SyscallDesc("write", writeFunc),
    /*  5 */ SyscallDesc("open", openFunc<MipsLinux>),
    /*  6 */ SyscallDesc("close", closeFunc),
    /*  7 */ SyscallDesc("waitpid", unimplementedFunc),
    /*  8 */ SyscallDesc("creat", unimplementedFunc),
    /*  9 */ SyscallDesc("link", unimplementedFunc),
    /* 10 */ SyscallDesc("unlink", unlinkFunc),
    /* 11 */ SyscallDesc("execve", unimplementedFunc),
    /* 12 */ SyscallDesc("chdir", unimplementedFunc),
    /* 13 */ SyscallDesc("time", unimplementedFunc),
    /* 14 */ SyscallDesc("mknod", unimplementedFunc),
    /* 15 */ SyscallDesc("chmod", chmodFunc<MipsLinux>),
    /* 16 */ SyscallDesc("lchown", chownFunc),
    /* 17 */ SyscallDesc("break", obreakFunc),
    /* 18 */ SyscallDesc("unused#18", unimplementedFunc),
    /* 19 */ SyscallDesc("lseek", lseekFunc),
    /* 20 */ SyscallDesc("getpid", getpidFunc),
    /* 21 */ SyscallDesc("mount", unimplementedFunc),
    /* 22 */ SyscallDesc("umount", unimplementedFunc),
    /* 23 */ SyscallDesc("setuid", setuidFunc),
    /* 24 */ SyscallDesc("getuid", getuidFunc),
    /* 25 */ SyscallDesc("stime", unimplementedFunc),
    /* 26 */ SyscallDesc("ptrace", unimplementedFunc),
    /* 27 */ SyscallDesc("alarm", unimplementedFunc),
    /* 28 */ SyscallDesc("unused#28", unimplementedFunc),
    /* 29 */ SyscallDesc("pause", unimplementedFunc),
    /* 30 */ SyscallDesc("utime", unimplementedFunc),
    /* 31 */ SyscallDesc("stty", unimplementedFunc),
    /* 32 */ SyscallDesc("gtty", unimplementedFunc),
    /* 33 */ SyscallDesc("access", unimplementedFunc),
    /* 34 */ SyscallDesc("nice", unimplementedFunc),
    /* 35 */ SyscallDesc("ftime", unimplementedFunc),
    /* 36 */ SyscallDesc("sync", unimplementedFunc),
    /* 37 */ SyscallDesc("kill", unimplementedFunc),
    /* 38 */ SyscallDesc("rename", unimplementedFunc),
    /* 39 */ SyscallDesc("mkdir", unimplementedFunc),
    /* 40 */ SyscallDesc("rmdir", unimplementedFunc),
    /* 41 */ SyscallDesc("dup", unimplementedFunc),
    /* 42 */ SyscallDesc("pipe", pipePseudoFunc),
    /* 43 */ SyscallDesc("times", unimplementedFunc),
    /* 44 */ SyscallDesc("prof", unimplementedFunc),
    /* 45 */ SyscallDesc("brk", obreakFunc),
    /* 46 */ SyscallDesc("setgid", unimplementedFunc),
    /* 47 */ SyscallDesc("getgid", getgidFunc),
    /* 48 */ SyscallDesc("signal", ignoreFunc),
    /* 49 */ SyscallDesc("geteuid", geteuidFunc),
    /* 50 */ SyscallDesc("getegid", getegidFunc),
    /* 51 */ SyscallDesc("acct", unimplementedFunc),
    /* 52 */ SyscallDesc("umount2", unimplementedFunc),
    /* 53 */ SyscallDesc("lock", unimplementedFunc),
    /* 54 */ SyscallDesc("ioctl", unimplementedFunc/*ioctlFunc<MipsLinux>*/),
    /* 55 */ SyscallDesc("fcntl", fcntlFunc),
    /* 56 */ SyscallDesc("mpx", unimplementedFunc),
    /* 57 */ SyscallDesc("setpgid", unimplementedFunc),
    /* 58 */ SyscallDesc("ulimit", unimplementedFunc),
    /* 59 */ SyscallDesc("unused#59", unimplementedFunc),
    /* 60 */ SyscallDesc("umask", unimplementedFunc),
    /* 61 */ SyscallDesc("chroot", unimplementedFunc),
    /* 62 */ SyscallDesc("ustat", unimplementedFunc),
    /* 63 */ SyscallDesc("dup2", unimplementedFunc),
    /* 64 */ SyscallDesc("getppid", getpagesizeFunc),
    /* 65 */ SyscallDesc("getpgrp", unimplementedFunc),
    /* 66 */ SyscallDesc("setsid", unimplementedFunc),
    /* 67 */ SyscallDesc("sigaction",unimplementedFunc),
    /* 68 */ SyscallDesc("sgetmask", unimplementedFunc),
    /* 69 */ SyscallDesc("ssetmask", unimplementedFunc),
    /* 70 */ SyscallDesc("setreuid", unimplementedFunc),
    /* 71 */ SyscallDesc("setregid", unimplementedFunc),
    /* 72 */ SyscallDesc("sigsuspend", unimplementedFunc),
    /* 73 */ SyscallDesc("sigpending", unimplementedFunc),
    /* 74 */ SyscallDesc("sethostname", ignoreFunc),
    /* 75 */ SyscallDesc("setrlimit", unimplementedFunc/*setrlimitFunc<MipsLinux>*/),
    /* 76 */ SyscallDesc("getrlimit", unimplementedFunc/*getrlimitFunc<MipsLinux>*/),