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 588 行 · 第 1/3 页

/*
 * Copyright (c) 2003, 2004, 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: Steven K. Reinhardt
 *          Ali G. Saidi
 */

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

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

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

using namespace std;
using namespace AlphaISA;



/// 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, "alpha");

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

/// Target osf_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
osf_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 << "osf_getsysinfo: unknown op " << op << endl;
        abort();
        break;
    }

    return 1;
}

/// Target osf_setsysinfo() handler.
static SyscallReturn
osf_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, "osf_setsysinfo(SSI_IEEE_FP_CONTROL): "
                   " setting FPCR to 0x%x\n", gtoh(*(uint64_t*)fpcr));
          return 0;
      }

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

    return 1;
}


SyscallDesc AlphaLinuxProcess::syscallDescs[] = {
    /*  0 */ SyscallDesc("osf_syscall", unimplementedFunc),
    /*  1 */ SyscallDesc("exit", exitFunc),
    /*  2 */ SyscallDesc("fork", unimplementedFunc),
    /*  3 */ SyscallDesc("read", readFunc),
    /*  4 */ SyscallDesc("write", writeFunc),
    /*  5 */ SyscallDesc("osf_old_open", unimplementedFunc),
    /*  6 */ SyscallDesc("close", closeFunc),
    /*  7 */ SyscallDesc("osf_wait4", unimplementedFunc),
    /*  8 */ SyscallDesc("osf_old_creat", unimplementedFunc),
    /*  9 */ SyscallDesc("link", unimplementedFunc),
    /* 10 */ SyscallDesc("unlink", unlinkFunc),
    /* 11 */ SyscallDesc("osf_execve", unimplementedFunc),
    /* 12 */ SyscallDesc("chdir", unimplementedFunc),
    /* 13 */ SyscallDesc("fchdir", unimplementedFunc),
    /* 14 */ SyscallDesc("mknod", unimplementedFunc),
    /* 15 */ SyscallDesc("chmod", chmodFunc<AlphaLinux>),
    /* 16 */ SyscallDesc("chown", chownFunc),
    /* 17 */ SyscallDesc("brk", obreakFunc),
    /* 18 */ SyscallDesc("osf_getfsstat", unimplementedFunc),
    /* 19 */ SyscallDesc("lseek", lseekFunc),
    /* 20 */ SyscallDesc("getxpid", getpidPseudoFunc),
    /* 21 */ SyscallDesc("osf_mount", unimplementedFunc),
    /* 22 */ SyscallDesc("umount", unimplementedFunc),
    /* 23 */ SyscallDesc("setuid", setuidFunc),
    /* 24 */ SyscallDesc("getxuid", getuidPseudoFunc),
    /* 25 */ SyscallDesc("exec_with_loader", unimplementedFunc),
    /* 26 */ SyscallDesc("osf_ptrace", unimplementedFunc),
    /* 27 */ SyscallDesc("osf_nrecvmsg", unimplementedFunc),
    /* 28 */ SyscallDesc("osf_nsendmsg", unimplementedFunc),
    /* 29 */ SyscallDesc("osf_nrecvfrom", unimplementedFunc),
    /* 30 */ SyscallDesc("osf_naccept", unimplementedFunc),
    /* 31 */ SyscallDesc("osf_ngetpeername", unimplementedFunc),
    /* 32 */ SyscallDesc("osf_ngetsockname", unimplementedFunc),
    /* 33 */ SyscallDesc("access", unimplementedFunc),
    /* 34 */ SyscallDesc("osf_chflags", unimplementedFunc),
    /* 35 */ SyscallDesc("osf_fchflags", unimplementedFunc),
    /* 36 */ SyscallDesc("sync", unimplementedFunc),
    /* 37 */ SyscallDesc("kill", unimplementedFunc),
    /* 38 */ SyscallDesc("osf_old_stat", unimplementedFunc),
    /* 39 */ SyscallDesc("setpgid", unimplementedFunc),
    /* 40 */ SyscallDesc("osf_old_lstat", unimplementedFunc),
    /* 41 */ SyscallDesc("dup", dupFunc),
    /* 42 */ SyscallDesc("pipe", pipePseudoFunc),
    /* 43 */ SyscallDesc("osf_set_program_attributes", unimplementedFunc),
    /* 44 */ SyscallDesc("osf_profil", unimplementedFunc),
    /* 45 */ SyscallDesc("open", openFunc<AlphaLinux>),
    /* 46 */ SyscallDesc("osf_old_sigaction", unimplementedFunc),
    /* 47 */ SyscallDesc("getxgid", getgidPseudoFunc),
    /* 48 */ SyscallDesc("osf_sigprocmask", ignoreFunc),
    /* 49 */ SyscallDesc("osf_getlogin", unimplementedFunc),
    /* 50 */ SyscallDesc("osf_setlogin", unimplementedFunc),
    /* 51 */ SyscallDesc("acct", unimplementedFunc),
    /* 52 */ SyscallDesc("sigpending", unimplementedFunc),
    /* 53 */ SyscallDesc("osf_classcntl", unimplementedFunc),
    /* 54 */ SyscallDesc("ioctl", ioctlFunc<AlphaLinux>),
    /* 55 */ SyscallDesc("osf_reboot", unimplementedFunc),
    /* 56 */ SyscallDesc("osf_revoke", unimplementedFunc),
    /* 57 */ SyscallDesc("symlink", unimplementedFunc),
    /* 58 */ SyscallDesc("readlink", unimplementedFunc),
    /* 59 */ SyscallDesc("execve", unimplementedFunc),
    /* 60 */ SyscallDesc("umask", unimplementedFunc),
    /* 61 */ SyscallDesc("chroot", unimplementedFunc),
    /* 62 */ SyscallDesc("osf_old_fstat", unimplementedFunc),
    /* 63 */ SyscallDesc("getpgrp", unimplementedFunc),
    /* 64 */ SyscallDesc("getpagesize", getpagesizeFunc),
    /* 65 */ SyscallDesc("osf_mremap", unimplementedFunc),
    /* 66 */ SyscallDesc("vfork", unimplementedFunc),
    /* 67 */ SyscallDesc("stat", statFunc<AlphaLinux>),
    /* 68 */ SyscallDesc("lstat", lstatFunc<AlphaLinux>),
    /* 69 */ SyscallDesc("osf_sbrk", unimplementedFunc),
    /* 70 */ SyscallDesc("osf_sstk", unimplementedFunc),
    /* 71 */ SyscallDesc("mmap", mmapFunc<AlphaLinux>),
    /* 72 */ SyscallDesc("osf_old_vadvise", unimplementedFunc),