linux.cc revision 9143
1/* 2 * Copyright (c) 2009 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Ali Saidi 29 */ 30 31#include <cstdio> 32#include <string> 33 34#include "cpu/thread_context.hh" 35#include "debug/SyscallVerbose.hh" 36#include "kern/linux/linux.hh" 37#include "sim/process.hh" 38#include "sim/system.hh" 39 40int 41Linux::openSpecialFile(std::string path, LiveProcess *process, 42 ThreadContext *tc) 43{ 44 DPRINTF(SyscallVerbose, "Opening special file: %s\n", path.c_str()); 45 if (path.compare(0, 13, "/proc/meminfo") == 0) { 46 std::string data = Linux::procMeminfo(process, tc); 47 FILE *f = tmpfile(); 48 int fd = fileno(f); 49 size_t ret M5_VAR_USED = fwrite(data.c_str(), 1, data.size(), f); 50 assert(ret == data.size()); 51 rewind(f); 52 return fd; 53 } 54 55 warn("Attempting to open special file: %s. Ignoring. Simulation may" 56 " take un-expected code path or be non-deterministic until proper" 57 " handling is implemented.\n", path.c_str()); 58 return -1; 59} 60 61std::string 62Linux::procMeminfo(LiveProcess *process, ThreadContext *tc) 63{ 64 return csprintf("MemTotal:%12d kB\nMemFree: %12d kB\n", 65 process->system->memSize() >> 10, 66 process->system->freeMemSize() >> 10); 67} 68 69