15795Ssaidi@eecs.umich.edu/* 25795Ssaidi@eecs.umich.edu * Copyright (c) 2009 The Regents of The University of Michigan 35795Ssaidi@eecs.umich.edu * All rights reserved. 45795Ssaidi@eecs.umich.edu * 55795Ssaidi@eecs.umich.edu * Redistribution and use in source and binary forms, with or without 65795Ssaidi@eecs.umich.edu * modification, are permitted provided that the following conditions are 75795Ssaidi@eecs.umich.edu * met: redistributions of source code must retain the above copyright 85795Ssaidi@eecs.umich.edu * notice, this list of conditions and the following disclaimer; 95795Ssaidi@eecs.umich.edu * redistributions in binary form must reproduce the above copyright 105795Ssaidi@eecs.umich.edu * notice, this list of conditions and the following disclaimer in the 115795Ssaidi@eecs.umich.edu * documentation and/or other materials provided with the distribution; 125795Ssaidi@eecs.umich.edu * neither the name of the copyright holders nor the names of its 135795Ssaidi@eecs.umich.edu * contributors may be used to endorse or promote products derived from 145795Ssaidi@eecs.umich.edu * this software without specific prior written permission. 155795Ssaidi@eecs.umich.edu * 165795Ssaidi@eecs.umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 175795Ssaidi@eecs.umich.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 185795Ssaidi@eecs.umich.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 195795Ssaidi@eecs.umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 205795Ssaidi@eecs.umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 215795Ssaidi@eecs.umich.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 225795Ssaidi@eecs.umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 235795Ssaidi@eecs.umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 245795Ssaidi@eecs.umich.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 255795Ssaidi@eecs.umich.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 265795Ssaidi@eecs.umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 275795Ssaidi@eecs.umich.edu * 285795Ssaidi@eecs.umich.edu * Authors: Ali Saidi 295795Ssaidi@eecs.umich.edu */ 305795Ssaidi@eecs.umich.edu 3111793Sbrandon.potter@amd.com#include "kern/linux/linux.hh" 3211793Sbrandon.potter@amd.com 336712Snate@binkert.org#include <cstdio> 345795Ssaidi@eecs.umich.edu#include <string> 355795Ssaidi@eecs.umich.edu 3611907SBrandon.Potter@amd.com#include "cpu/base.hh" 378232Snate@binkert.org#include "debug/SyscallVerbose.hh" 385795Ssaidi@eecs.umich.edu#include "sim/process.hh" 395795Ssaidi@eecs.umich.edu#include "sim/system.hh" 405795Ssaidi@eecs.umich.edu 415795Ssaidi@eecs.umich.eduint 4211851Sbrandon.potter@amd.comLinux::openSpecialFile(std::string path, Process *process, 439143Ssteve.reinhardt@amd.com ThreadContext *tc) 445795Ssaidi@eecs.umich.edu{ 4511907SBrandon.Potter@amd.com DPRINTFR(SyscallVerbose, 4611907SBrandon.Potter@amd.com "%d: %s: generic-open: opening special file: %s\n", 4711907SBrandon.Potter@amd.com curTick(), tc->getCpuPtr()->name(), path.c_str()); 4811907SBrandon.Potter@amd.com 4911907SBrandon.Potter@amd.com bool matched = false; 5011907SBrandon.Potter@amd.com std::string data; 5111907SBrandon.Potter@amd.com 525795Ssaidi@eecs.umich.edu if (path.compare(0, 13, "/proc/meminfo") == 0) { 5311907SBrandon.Potter@amd.com data = Linux::procMeminfo(process, tc); 5411907SBrandon.Potter@amd.com matched = true; 5511907SBrandon.Potter@amd.com } else if (path.compare(0, 11, "/etc/passwd") == 0) { 5611907SBrandon.Potter@amd.com data = Linux::etcPasswd(process, tc); 5711907SBrandon.Potter@amd.com matched = true; 5811907SBrandon.Potter@amd.com } 5911907SBrandon.Potter@amd.com 6011907SBrandon.Potter@amd.com if (matched) { 615795Ssaidi@eecs.umich.edu FILE *f = tmpfile(); 625795Ssaidi@eecs.umich.edu int fd = fileno(f); 636227Snate@binkert.org size_t ret M5_VAR_USED = fwrite(data.c_str(), 1, data.size(), f); 645795Ssaidi@eecs.umich.edu assert(ret == data.size()); 655795Ssaidi@eecs.umich.edu rewind(f); 665795Ssaidi@eecs.umich.edu return fd; 6711907SBrandon.Potter@amd.com } else { 6811907SBrandon.Potter@amd.com warn("Attempting to open special file: %s. Ignoring. Simulation may " 6911907SBrandon.Potter@amd.com "take un-expected code path or be non-deterministic until proper " 7011907SBrandon.Potter@amd.com "handling is implemented.\n", path.c_str()); 7111907SBrandon.Potter@amd.com errno = EACCES; 7211907SBrandon.Potter@amd.com return -1; 735795Ssaidi@eecs.umich.edu } 745795Ssaidi@eecs.umich.edu} 755795Ssaidi@eecs.umich.edu 765795Ssaidi@eecs.umich.edustd::string 7711851Sbrandon.potter@amd.comLinux::procMeminfo(Process *process, ThreadContext *tc) 785795Ssaidi@eecs.umich.edu{ 795795Ssaidi@eecs.umich.edu return csprintf("MemTotal:%12d kB\nMemFree: %12d kB\n", 805795Ssaidi@eecs.umich.edu process->system->memSize() >> 10, 815795Ssaidi@eecs.umich.edu process->system->freeMemSize() >> 10); 825795Ssaidi@eecs.umich.edu} 835795Ssaidi@eecs.umich.edu 8411907SBrandon.Potter@amd.comstd::string 8511907SBrandon.Potter@amd.comLinux::etcPasswd(Process *process, ThreadContext *tc) 8611907SBrandon.Potter@amd.com{ 8711907SBrandon.Potter@amd.com return csprintf("gem5-user:x:1000:1000:gem5-user,,,:%s:/bin/bash\n", 8813883Sdavid.hashe@amd.com process->tgtCwd); 8911907SBrandon.Potter@amd.com} 90