alpha_linux_process.cc

linux下基于c++的处理器仿真平台。具有处理器流水线

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

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

	return 1;
    }

    /// Target fnctl() handler.
    static SyscallReturn
    fcntlFunc(SyscallDesc *desc, int callnum, Process *process,
	      ExecContext *xc)
    {
	int fd = xc->getSyscallArg(0);

	if (fd < 0 || process->sim_fd(fd) < 0)
	    return -EBADF;

	int cmd = xc->getSyscallArg(1);
	switch (cmd) {
	  case 0: // F_DUPFD
	    // if we really wanted to support this, we'd need to do it
	    // in the target fd space.
	    warn("fcntl(%d, F_DUPFD) not supported, error returned\n", fd);
	    return -EMFILE;

	  case 1: // F_GETFD (get close-on-exec flag)
	  case 2: // F_SETFD (set close-on-exec flag)
	    return 0;
	
	  case 3: // F_GETFL (get file flags)
	  case 4: // F_SETFL (set file flags)
	    // not sure if this is totally valid, but we'll pass it through
	    // to the underlying OS
	    warn("fcntl(%d, %d) passed through to host\n", fd, cmd);
	    return fcntl(process->sim_fd(fd), cmd);
	    // return 0;

	  case 7: // F_GETLK  (get lock)
	  case 8: // F_SETLK  (set lock)
	  case 9: // F_SETLKW (set lock and wait)
	    // don't mess with file locking... just act like it's OK
	    warn("File lock call (fcntl(%d, %d)) ignored.\n", fd, cmd);
	    return 0;

	  default:
	    warn("Unknown fcntl command %d\n", cmd);
	    return 0;
	}
    }

    /// Array of syscall descriptors, indexed by call number.
    static SyscallDesc syscallDescs[];

    /// Number of syscalls in syscallDescs[].
    static const int Num_Syscall_Descs;

    /// Max supported syscall number.
    static const int Max_Syscall_Desc;

    /// Do the specified syscall.  Just looks the call number up in
    /// the table and invokes the appropriate handler.
    static void
    doSyscall(int callnum, Process *process, ExecContext *xc)
    {
	if (callnum < 0 || callnum > Max_Syscall_Desc) {
	    fatal("Syscall %d out of range", callnum);
	}

	SyscallDesc *desc = &syscallDescs[callnum];

	desc->doSyscall(callnum, process, xc);
    }
};  // class Linux


// open(2) flags translation table
OpenFlagTransTable Linux::openFlagTable[] = {
#ifdef _MSC_VER
  { Linux::TGT_O_RDONLY,	_O_RDONLY },
  { Linux::TGT_O_WRONLY,	_O_WRONLY },
  { Linux::TGT_O_RDWR,		_O_RDWR },
  { Linux::TGT_O_APPEND,	_O_APPEND },
  { Linux::TGT_O_CREAT,		_O_CREAT },
  { Linux::TGT_O_TRUNC,		_O_TRUNC },
  { Linux::TGT_O_EXCL,		_O_EXCL },
#ifdef _O_NONBLOCK
  { Linux::TGT_O_NONBLOCK,	_O_NONBLOCK },
#endif
#ifdef _O_NOCTTY
  { Linux::TGT_O_NOCTTY,	_O_NOCTTY },
#endif
#ifdef _O_SYNC
  { Linux::TGT_O_SYNC,		_O_SYNC },
#endif
#else /* !_MSC_VER */
  { Linux::TGT_O_RDONLY,	O_RDONLY },
  { Linux::TGT_O_WRONLY,	O_WRONLY },
  { Linux::TGT_O_RDWR,		O_RDWR },
  { Linux::TGT_O_APPEND,	O_APPEND },
  { Linux::TGT_O_CREAT,		O_CREAT },
  { Linux::TGT_O_TRUNC,		O_TRUNC },
  { Linux::TGT_O_EXCL,		O_EXCL },
  { Linux::TGT_O_NONBLOCK,	O_NONBLOCK },
  { Linux::TGT_O_NOCTTY,	O_NOCTTY },
#ifdef O_SYNC
  { Linux::TGT_O_SYNC,		O_SYNC },
#endif
#endif /* _MSC_VER */
};

const int Linux::NUM_OPEN_FLAGS =
	(sizeof(Linux::openFlagTable)/sizeof(Linux::openFlagTable[0]));

const char *Linux::hostname = "m5.eecs.umich.edu";

SyscallDesc Linux::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", unimplementedFunc),
    /* 16 */ SyscallDesc("chown", unimplementedFunc),
    /* 17 */ SyscallDesc("brk", obreakFunc),
    /* 18 */ SyscallDesc("osf_getfsstat", unimplementedFunc),
    /* 19 */ SyscallDesc("lseek", lseekFunc),
    /* 20 */ SyscallDesc("getxpid", getpidFunc),
    /* 21 */ SyscallDesc("osf_mount", unimplementedFunc),
    /* 22 */ SyscallDesc("umount", unimplementedFunc),
    /* 23 */ SyscallDesc("setuid", setuidFunc),
    /* 24 */ SyscallDesc("getxuid", getuidFunc),
    /* 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", unimplementedFunc),
    /* 42 */ SyscallDesc("pipe", unimplementedFunc),
    /* 43 */ SyscallDesc("osf_set_program_attributes", unimplementedFunc),
    /* 44 */ SyscallDesc("osf_profil", unimplementedFunc),
    /* 45 */ SyscallDesc("open", openFunc<Linux>),
    /* 46 */ SyscallDesc("osf_old_sigaction", unimplementedFunc),
    /* 47 */ SyscallDesc("getxgid", getgidFunc),
    /* 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<Linux>),
    /* 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<Linux>),
    /* 68 */ SyscallDesc("lstat", lstatFunc<Linux>),
    /* 69 */ SyscallDesc("osf_sbrk", unimplementedFunc),
    /* 70 */ SyscallDesc("osf_sstk", unimplementedFunc),
    /* 71 */ SyscallDesc("mmap", mmapFunc<Linux>),
    /* 72 */ SyscallDesc("osf_old_vadvise", unimplementedFunc),
    /* 73 */ SyscallDesc("munmap", munmapFunc),
    /* 74 */ SyscallDesc("mprotect", ignoreFunc),
    /* 75 */ SyscallDesc("madvise", unimplementedFunc),
    /* 76 */ SyscallDesc("vhangup", unimplementedFunc),
    /* 77 */ SyscallDesc("osf_kmodcall", unimplementedFunc),
    /* 78 */ SyscallDesc("osf_mincore", unimplementedFunc),
    /* 79 */ SyscallDesc("getgroups", unimplementedFunc),
    /* 80 */ SyscallDesc("setgroups", unimplementedFunc),
    /* 81 */ SyscallDesc("osf_old_getpgrp", unimplementedFunc),
    /* 82 */ SyscallDesc("setpgrp", unimplementedFunc),
    /* 83 */ SyscallDesc("osf_setitimer", unimplementedFunc),
    /* 84 */ SyscallDesc("osf_old_wait", unimplementedFunc),
    /* 85 */ SyscallDesc("osf_table", unimplementedFunc),
    /* 86 */ SyscallDesc("osf_getitimer", unimplementedFunc),
    /* 87 */ SyscallDesc("gethostname", gethostnameFunc),
    /* 88 */ SyscallDesc("sethostname", unimplementedFunc),
    /* 89 */ SyscallDesc("getdtablesize", unimplementedFunc),
    /* 90 */ SyscallDesc("dup2", unimplementedFunc),
    /* 91 */ SyscallDesc("fstat", fstatFunc<Linux>),
    /* 92 */ SyscallDesc("fcntl", fcntlFunc),
    /* 93 */ SyscallDesc("osf_select", unimplementedFunc),
    /* 94 */ SyscallDesc("poll", unimplementedFunc),
    /* 95 */ SyscallDesc("fsync", unimplementedFunc),
    /* 96 */ SyscallDesc("setpriority", unimplementedFunc),
    /* 97 */ SyscallDesc("socket", unimplementedFunc),
    /* 98 */ SyscallDesc("connect", unimplementedFunc),
    /* 99 */ SyscallDesc("accept", unimplementedFunc),
    /* 100 */ SyscallDesc("getpriority", unimplementedFunc),
    /* 101 */ SyscallDesc("send", unimplementedFunc),
    /* 102 */ SyscallDesc("recv", unimplementedFunc),
    /* 103 */ SyscallDesc("sigreturn", unimplementedFunc),
    /* 104 */ SyscallDesc("bind", unimplementedFunc),
    /* 105 */ SyscallDesc("setsockopt", unimplementedFunc),
    /* 106 */ SyscallDesc("listen", unimplementedFunc),
    /* 107 */ SyscallDesc("osf_plock", unimplementedFunc),
    /* 108 */ SyscallDesc("osf_old_sigvec", unimplementedFunc),
    /* 109 */ SyscallDesc("osf_old_sigblock", unimplementedFunc),
    /* 110 */ SyscallDesc("osf_old_sigsetmask", unimplementedFunc),
    /* 111 */ SyscallDesc("sigsuspend", unimplementedFunc),
    /* 112 */ SyscallDesc("osf_sigstack", ignoreFunc),
    /* 113 */ SyscallDesc("recvmsg", unimplementedFunc),
    /* 114 */ SyscallDesc("sendmsg", unimplementedFunc),
    /* 115 */ SyscallDesc("osf_old_vtrace", unimplementedFunc),
    /* 116 */ SyscallDesc("osf_gettimeofday", unimplementedFunc),
    /* 117 */ SyscallDesc("osf_getrusage", unimplementedFunc),
    /* 118 */ SyscallDesc("getsockopt", unimplementedFunc),
    /* 119 */ SyscallDesc("numa_syscalls", unimplementedFunc),
    /* 120 */ SyscallDesc("readv", unimplementedFunc),
    /* 121 */ SyscallDesc("writev", unimplementedFunc),
    /* 122 */ SyscallDesc("osf_settimeofday", unimplementedFunc),
    /* 123 */ SyscallDesc("fchown", unimplementedFunc),
    /* 124 */ SyscallDesc("fchmod", unimplementedFunc),
    /* 125 */ SyscallDesc("recvfrom", unimplementedFunc),
    /* 126 */ SyscallDesc("setreuid", unimplementedFunc),
    /* 127 */ SyscallDesc("setregid", unimplementedFunc),
    /* 128 */ SyscallDesc("rename", renameFunc),
    /* 129 */ SyscallDesc("truncate", unimplementedFunc),
    /* 130 */ SyscallDesc("ftruncate", unimplementedFunc),
    /* 131 */ SyscallDesc("flock", unimplementedFunc),
    /* 132 */ SyscallDesc("setgid", unimplementedFunc),
    /* 133 */ SyscallDesc("sendto", unimplementedFunc),
    /* 134 */ SyscallDesc("shutdown", unimplementedFunc),
    /* 135 */ SyscallDesc("socketpair", unimplementedFunc),
    /* 136 */ SyscallDesc("mkdir", unimplementedFunc),
    /* 137 */ SyscallDesc("rmdir", unimplementedFunc),
    /* 138 */ SyscallDesc("osf_utimes", unimplementedFunc),
    /* 139 */ SyscallDesc("osf_old_sigreturn", unimplementedFunc),
    /* 140 */ SyscallDesc("osf_adjtime", unimplementedFunc),
    /* 141 */ SyscallDesc("getpeername", unimplementedFunc),
    /* 142 */ SyscallDesc("osf_gethostid", unimplementedFunc),
    /* 143 */ SyscallDesc("osf_sethostid", unimplementedFunc),
    /* 144 */ SyscallDesc("getrlimit", getrlimitFunc<Linux>),
    /* 145 */ SyscallDesc("setrlimit", ignoreFunc),
    /* 146 */ SyscallDesc("osf_old_killpg", unimplementedFunc),
    /* 147 */ SyscallDesc("setsid", unimplementedFunc),
    /* 148 */ SyscallDesc("quotactl", unimplementedFunc),
    /* 149 */ SyscallDesc("osf_oldquota", unimplementedFunc),
    /* 150 */ SyscallDesc("getsockname", unimplementedFunc),
    /* 151 */ SyscallDesc("osf_pread", unimplementedFunc),
    /* 152 */ SyscallDesc("osf_pwrite", unimplementedFunc),
    /* 153 */ SyscallDesc("osf_pid_block", unimplementedFunc),
    /* 154 */ SyscallDesc("osf_pid_unblock", unimplementedFunc),
    /* 155 */ SyscallDesc("osf_signal_urti", unimplementedFunc),
    /* 156 */ SyscallDesc("sigaction", ignoreFunc),
    /* 157 */ SyscallDesc("osf_sigwaitprim", unimplementedFunc),
    /* 158 */ SyscallDesc("osf_nfssvc", unimplementedFunc),
    /* 159 */ SyscallDesc("osf_getdirentries", unimplementedFunc),
    /* 160 */ SyscallDesc("osf_statfs", unimplementedFunc),
    /* 161 */ SyscallDesc("osf_fstatfs", unimplementedFunc),
    /* 162 */ SyscallDesc("unknown #162", unimplementedFunc),
    /* 163 */ SyscallDesc("osf_async_daemon", unimplementedFunc),
    /* 164 */ SyscallDesc("osf_getfh", unimplementedFunc),
    /* 165 */ SyscallDesc("osf_getdomainname", unimplementedFunc),
    /* 166 */ SyscallDesc("setdomainname", unimplementedFunc),