process.cc revision 2561
110037SARM gem5 Developers/* 210037SARM gem5 Developers * Copyright (c) 2001-2005 The Regents of The University of Michigan 312110SRekai.GonzalezAlberquilla@arm.com * All rights reserved. 410037SARM gem5 Developers * 510037SARM gem5 Developers * Redistribution and use in source and binary forms, with or without 610037SARM gem5 Developers * modification, are permitted provided that the following conditions are 710037SARM gem5 Developers * met: redistributions of source code must retain the above copyright 810037SARM gem5 Developers * notice, this list of conditions and the following disclaimer; 910037SARM gem5 Developers * redistributions in binary form must reproduce the above copyright 1010037SARM gem5 Developers * notice, this list of conditions and the following disclaimer in the 1110037SARM gem5 Developers * documentation and/or other materials provided with the distribution; 1210037SARM gem5 Developers * neither the name of the copyright holders nor the names of its 1310037SARM gem5 Developers * contributors may be used to endorse or promote products derived from 1410037SARM gem5 Developers * this software without specific prior written permission. 1510037SARM gem5 Developers * 1610037SARM gem5 Developers * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 1710037SARM gem5 Developers * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 1810037SARM gem5 Developers * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 1910037SARM gem5 Developers * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 2010037SARM gem5 Developers * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 2110037SARM gem5 Developers * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 2210037SARM gem5 Developers * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2310037SARM gem5 Developers * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2410037SARM gem5 Developers * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2510037SARM gem5 Developers * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 2610037SARM gem5 Developers * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2710037SARM gem5 Developers */ 2810037SARM gem5 Developers 2910037SARM gem5 Developers#include <unistd.h> 3010037SARM gem5 Developers#include <fcntl.h> 3110037SARM gem5 Developers 3210037SARM gem5 Developers#include <cstdio> 3310037SARM gem5 Developers#include <string> 3410037SARM gem5 Developers 3510037SARM gem5 Developers#include "base/intmath.hh" 3610037SARM gem5 Developers#include "base/loader/object_file.hh" 3710037SARM gem5 Developers#include "base/loader/symtab.hh" 3810037SARM gem5 Developers#include "base/statistics.hh" 3910037SARM gem5 Developers#include "config/full_system.hh" 4010037SARM gem5 Developers#include "cpu/exec_context.hh" 4110037SARM gem5 Developers#include "mem/page_table.hh" 4210037SARM gem5 Developers#include "mem/physical.hh" 4310037SARM gem5 Developers#include "mem/translating_port.hh" 4410037SARM gem5 Developers#include "sim/builder.hh" 4511165SRekai.GonzalezAlberquilla@arm.com#include "sim/process.hh" 4610037SARM gem5 Developers#include "sim/stats.hh" 4710037SARM gem5 Developers#include "sim/syscall_emul.hh" 4810037SARM gem5 Developers#include "sim/system.hh" 4910037SARM gem5 Developers 5010037SARM gem5 Developersusing namespace std; 5110037SARM gem5 Developersusing namespace TheISA; 5210037SARM gem5 Developers 5311165SRekai.GonzalezAlberquilla@arm.com// 5410037SARM gem5 Developers// The purpose of this code is to fake the loader & syscall mechanism 5511165SRekai.GonzalezAlberquilla@arm.com// when there's no OS: thus there's no resone to use it in FULL_SYSTEM 5610037SARM gem5 Developers// mode when we do have an OS 5710037SARM gem5 Developers// 5810037SARM gem5 Developers#if FULL_SYSTEM 5910037SARM gem5 Developers#error "process.cc not compatible with FULL_SYSTEM" 6010037SARM gem5 Developers#endif 6110037SARM gem5 Developers 6210037SARM gem5 Developers// current number of allocated processes 6310037SARM gem5 Developersint num_processes = 0; 6410037SARM gem5 Developers 6510037SARM gem5 DevelopersProcess::Process(const string &nm, 6610037SARM gem5 Developers System *_system, 6710037SARM gem5 Developers int stdin_fd, // initial I/O descriptors 6810037SARM gem5 Developers int stdout_fd, 6910037SARM gem5 Developers int stderr_fd) 7010037SARM gem5 Developers : SimObject(nm), system(_system) 7110037SARM gem5 Developers{ 7210037SARM gem5 Developers // initialize first 3 fds (stdin, stdout, stderr) 7310037SARM gem5 Developers fd_map[STDIN_FILENO] = stdin_fd; 7410037SARM gem5 Developers fd_map[STDOUT_FILENO] = stdout_fd; 7510037SARM gem5 Developers fd_map[STDERR_FILENO] = stderr_fd; 7610037SARM gem5 Developers 7710037SARM gem5 Developers // mark remaining fds as free 7810037SARM gem5 Developers for (int i = 3; i <= MAX_FD; ++i) { 7910037SARM gem5 Developers fd_map[i] = -1; 8010037SARM gem5 Developers } 8110037SARM gem5 Developers 8210037SARM gem5 Developers mmap_start = mmap_end = 0; 8310037SARM gem5 Developers nxm_start = nxm_end = 0; 8410037SARM gem5 Developers pTable = new PageTable(system); 8510037SARM gem5 Developers // other parameters will be initialized when the program is loaded 8610037SARM gem5 Developers} 8710037SARM gem5 Developers 8810037SARM gem5 Developers 8910037SARM gem5 Developersvoid 9010037SARM gem5 DevelopersProcess::regStats() 9110037SARM gem5 Developers{ 9210037SARM gem5 Developers using namespace Stats; 9310037SARM gem5 Developers 9410037SARM gem5 Developers num_syscalls 9510037SARM gem5 Developers .name(name() + ".PROG:num_syscalls") 9610037SARM gem5 Developers .desc("Number of system calls") 9710037SARM gem5 Developers ; 9810037SARM gem5 Developers} 9910037SARM gem5 Developers 10010037SARM gem5 Developers// 10110037SARM gem5 Developers// static helper functions 10210037SARM gem5 Developers// 10310037SARM gem5 Developersint 10410037SARM gem5 DevelopersProcess::openInputFile(const string &filename) 10510037SARM gem5 Developers{ 10610037SARM gem5 Developers int fd = open(filename.c_str(), O_RDONLY); 10710037SARM gem5 Developers 10810037SARM gem5 Developers if (fd == -1) { 10910037SARM gem5 Developers perror(NULL); 11010037SARM gem5 Developers cerr << "unable to open \"" << filename << "\" for reading\n"; 11110037SARM gem5 Developers fatal("can't open input file"); 11210037SARM gem5 Developers } 11310037SARM gem5 Developers 11410037SARM gem5 Developers return fd; 11510037SARM gem5 Developers} 11610037SARM gem5 Developers 11710037SARM gem5 Developers 11810037SARM gem5 Developersint 11910037SARM gem5 DevelopersProcess::openOutputFile(const string &filename) 12010037SARM gem5 Developers{ 12110037SARM gem5 Developers int fd = open(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC, 0774); 12210037SARM gem5 Developers 12310037SARM gem5 Developers if (fd == -1) { 12410037SARM gem5 Developers perror(NULL); 12510037SARM gem5 Developers cerr << "unable to open \"" << filename << "\" for writing\n"; 12610037SARM gem5 Developers fatal("can't open output file"); 12710037SARM gem5 Developers } 12810037SARM gem5 Developers 12910037SARM gem5 Developers return fd; 13010037SARM gem5 Developers} 13110037SARM gem5 Developers 13210037SARM gem5 Developers 13310037SARM gem5 Developersint 13410037SARM gem5 DevelopersProcess::registerExecContext(ExecContext *xc) 13510037SARM gem5 Developers{ 13610037SARM gem5 Developers // add to list 13710037SARM gem5 Developers int myIndex = execContexts.size(); 13810037SARM gem5 Developers execContexts.push_back(xc); 13910037SARM gem5 Developers 14010037SARM gem5 Developers // return CPU number to caller 14110037SARM gem5 Developers return myIndex; 14210037SARM gem5 Developers} 14310037SARM gem5 Developers 14410037SARM gem5 Developersvoid 14510037SARM gem5 DevelopersProcess::startup() 14610037SARM gem5 Developers{ 14710037SARM gem5 Developers if (execContexts.empty()) 14810037SARM gem5 Developers fatal("Process %s is not associated with any CPUs!\n", name()); 14910037SARM gem5 Developers 15010037SARM gem5 Developers // first exec context for this process... initialize & enable 15110037SARM gem5 Developers ExecContext *xc = execContexts[0]; 15210037SARM gem5 Developers 15310037SARM gem5 Developers // mark this context as active so it will start ticking. 15410037SARM gem5 Developers xc->activate(0); 15510037SARM gem5 Developers 15610037SARM gem5 Developers Port *mem_port; 15710037SARM gem5 Developers mem_port = system->physmem->getPort("functional"); 15810037SARM gem5 Developers initVirtMem = new TranslatingPort(pTable, true); 15910037SARM gem5 Developers mem_port->setPeer(initVirtMem); 16010037SARM gem5 Developers initVirtMem->setPeer(mem_port); 16110037SARM gem5 Developers} 16210037SARM gem5 Developers 16310037SARM gem5 Developersvoid 16410037SARM gem5 DevelopersProcess::replaceExecContext(ExecContext *xc, int xcIndex) 16510037SARM gem5 Developers{ 16610037SARM gem5 Developers if (xcIndex >= execContexts.size()) { 16710037SARM gem5 Developers panic("replaceExecContext: bad xcIndex, %d >= %d\n", 16810037SARM gem5 Developers xcIndex, execContexts.size()); 16910037SARM gem5 Developers } 17010037SARM gem5 Developers 17110037SARM gem5 Developers execContexts[xcIndex] = xc; 17210037SARM gem5 Developers} 17310037SARM gem5 Developers 17410037SARM gem5 Developers// map simulator fd sim_fd to target fd tgt_fd 17510037SARM gem5 Developersvoid 17610037SARM gem5 DevelopersProcess::dup_fd(int sim_fd, int tgt_fd) 17710037SARM gem5 Developers{ 17810037SARM gem5 Developers if (tgt_fd < 0 || tgt_fd > MAX_FD) 17910037SARM gem5 Developers panic("Process::dup_fd tried to dup past MAX_FD (%d)", tgt_fd); 18010037SARM gem5 Developers 18110037SARM gem5 Developers fd_map[tgt_fd] = sim_fd; 18210037SARM gem5 Developers} 18310037SARM gem5 Developers 18410037SARM gem5 Developers 18510037SARM gem5 Developers// generate new target fd for sim_fd 18610037SARM gem5 Developersint 18710037SARM gem5 DevelopersProcess::alloc_fd(int sim_fd) 18810037SARM gem5 Developers{ 18910037SARM gem5 Developers // in case open() returns an error, don't allocate a new fd 19010037SARM gem5 Developers if (sim_fd == -1) 19110037SARM gem5 Developers return -1; 19210037SARM gem5 Developers 19310037SARM gem5 Developers // find first free target fd 19410037SARM gem5 Developers for (int free_fd = 0; free_fd < MAX_FD; ++free_fd) { 19510037SARM gem5 Developers if (fd_map[free_fd] == -1) { 19610037SARM gem5 Developers fd_map[free_fd] = sim_fd; 19710037SARM gem5 Developers return free_fd; 19810037SARM gem5 Developers } 19910037SARM gem5 Developers } 20010037SARM gem5 Developers 20110037SARM gem5 Developers panic("Process::alloc_fd: out of file descriptors!"); 20210037SARM gem5 Developers} 20310037SARM gem5 Developers 20410037SARM gem5 Developers 20510037SARM gem5 Developers// free target fd (e.g., after close) 20610037SARM gem5 Developersvoid 20710037SARM gem5 DevelopersProcess::free_fd(int tgt_fd) 20810037SARM gem5 Developers{ 20910037SARM gem5 Developers if (fd_map[tgt_fd] == -1) 21010037SARM gem5 Developers warn("Process::free_fd: request to free unused fd %d", tgt_fd); 21110037SARM gem5 Developers 21210037SARM gem5 Developers fd_map[tgt_fd] = -1; 21310037SARM gem5 Developers} 21410037SARM gem5 Developers 21510037SARM gem5 Developers 21610037SARM gem5 Developers// look up simulator fd for given target fd 21710037SARM gem5 Developersint 21810037SARM gem5 DevelopersProcess::sim_fd(int tgt_fd) 21910037SARM gem5 Developers{ 22010037SARM gem5 Developers if (tgt_fd > MAX_FD) 22110037SARM gem5 Developers return -1; 22210037SARM gem5 Developers 22310037SARM gem5 Developers return fd_map[tgt_fd]; 22410037SARM gem5 Developers} 22510037SARM gem5 Developers 22610037SARM gem5 Developers 22710037SARM gem5 Developers 22812110SRekai.GonzalezAlberquilla@arm.com// 22912110SRekai.GonzalezAlberquilla@arm.com// need to declare these here since there is no concrete Process type 23012110SRekai.GonzalezAlberquilla@arm.com// that can be constructed (i.e., no REGISTER_SIM_OBJECT() macro call, 23112110SRekai.GonzalezAlberquilla@arm.com// which is where these get declared for concrete types). 23212110SRekai.GonzalezAlberquilla@arm.com// 23312110SRekai.GonzalezAlberquilla@arm.comDEFINE_SIM_OBJECT_CLASS_NAME("Process", Process) 23412110SRekai.GonzalezAlberquilla@arm.com 23512110SRekai.GonzalezAlberquilla@arm.com 23612110SRekai.GonzalezAlberquilla@arm.com//////////////////////////////////////////////////////////////////////// 23712110SRekai.GonzalezAlberquilla@arm.com// 23810037SARM gem5 Developers// LiveProcess member definitions 23910037SARM gem5 Developers// 24010037SARM gem5 Developers//////////////////////////////////////////////////////////////////////// 24110037SARM gem5 Developers 24210037SARM gem5 Developers 24310037SARM gem5 Developersvoid 24410037SARM gem5 DeveloperscopyStringArray(vector<string> &strings, Addr array_ptr, Addr data_ptr, 24510037SARM gem5 Developers TranslatingPort* memPort) 24610037SARM gem5 Developers{ 24710037SARM gem5 Developers Addr data_ptr_swap; 24810037SARM gem5 Developers for (int i = 0; i < strings.size(); ++i) { 24910037SARM gem5 Developers data_ptr_swap = htog(data_ptr); 25010037SARM gem5 Developers memPort->writeBlob(array_ptr, (uint8_t*)&data_ptr_swap, sizeof(Addr)); 25110037SARM gem5 Developers memPort->writeString(data_ptr, strings[i].c_str()); 25210037SARM gem5 Developers array_ptr += sizeof(Addr); 25310037SARM gem5 Developers data_ptr += strings[i].size() + 1; 25410037SARM gem5 Developers } 25510037SARM gem5 Developers // add NULL terminator 25610037SARM gem5 Developers data_ptr = 0; 25710037SARM gem5 Developers 25810037SARM gem5 Developers memPort->writeBlob(array_ptr, (uint8_t*)&data_ptr, sizeof(Addr)); 25910037SARM gem5 Developers} 26010037SARM gem5 Developers 26110037SARM gem5 DevelopersLiveProcess::LiveProcess(const string &nm, ObjectFile *_objFile, 26210037SARM gem5 Developers System *_system, 26310037SARM gem5 Developers int stdin_fd, int stdout_fd, int stderr_fd, 26410037SARM gem5 Developers vector<string> &_argv, vector<string> &_envp) 26510037SARM gem5 Developers : Process(nm, _system, stdin_fd, stdout_fd, stderr_fd), 26610037SARM gem5 Developers objFile(_objFile), argv(_argv), envp(_envp) 26710037SARM gem5 Developers{ 26810037SARM gem5 Developers prog_fname = argv[0]; 26910037SARM gem5 Developers 27010037SARM gem5 Developers // load up symbols, if any... these may be used for debugging or 27110037SARM gem5 Developers // profiling. 27210037SARM gem5 Developers if (!debugSymbolTable) { 27310037SARM gem5 Developers debugSymbolTable = new SymbolTable(); 27410037SARM gem5 Developers if (!objFile->loadGlobalSymbols(debugSymbolTable) || 27510037SARM gem5 Developers !objFile->loadLocalSymbols(debugSymbolTable)) { 27610037SARM gem5 Developers // didn't load any symbols 27710037SARM gem5 Developers delete debugSymbolTable; 27810037SARM gem5 Developers debugSymbolTable = NULL; 27910037SARM gem5 Developers } 28010037SARM gem5 Developers } 28110037SARM gem5 Developers} 28210037SARM gem5 Developers 28310037SARM gem5 Developersvoid 28410037SARM gem5 DevelopersLiveProcess::argsInit(int intSize, int pageSize) 28510037SARM gem5 Developers{ 28610037SARM gem5 Developers Process::startup(); 28710037SARM gem5 Developers 28810037SARM gem5 Developers // load object file into target memory 28910037SARM gem5 Developers objFile->loadSections(initVirtMem); 29010037SARM gem5 Developers 29110037SARM gem5 Developers // Calculate how much space we need for arg & env arrays. 29210037SARM gem5 Developers int argv_array_size = intSize * (argv.size() + 1); 29310037SARM gem5 Developers int envp_array_size = intSize * (envp.size() + 1); 29410037SARM gem5 Developers int arg_data_size = 0; 29510037SARM gem5 Developers for (int i = 0; i < argv.size(); ++i) { 29610037SARM gem5 Developers arg_data_size += argv[i].size() + 1; 29710037SARM gem5 Developers } 29810037SARM gem5 Developers int env_data_size = 0; 29910037SARM gem5 Developers for (int i = 0; i < envp.size(); ++i) { 30010037SARM gem5 Developers env_data_size += envp[i].size() + 1; 30110037SARM gem5 Developers } 30210037SARM gem5 Developers 30310037SARM gem5 Developers int space_needed = 30410037SARM gem5 Developers argv_array_size + envp_array_size + arg_data_size + env_data_size; 30510037SARM gem5 Developers // for SimpleScalar compatibility 30610037SARM gem5 Developers if (space_needed < 16384) 30710037SARM gem5 Developers space_needed = 16384; 30810037SARM gem5 Developers 30910037SARM gem5 Developers // set bottom of stack 31010037SARM gem5 Developers stack_min = stack_base - space_needed; 31110037SARM gem5 Developers // align it 31210037SARM gem5 Developers stack_min &= ~(intSize-1); 31310037SARM gem5 Developers stack_size = stack_base - stack_min; 31410037SARM gem5 Developers // map memory 31510037SARM gem5 Developers pTable->allocate(roundDown(stack_min, pageSize), 31610037SARM gem5 Developers roundUp(stack_size, pageSize)); 31710037SARM gem5 Developers 31810037SARM gem5 Developers // map out initial stack contents 31910037SARM gem5 Developers Addr argv_array_base = stack_min + sizeof(uint64_t); // room for argc 32010037SARM gem5 Developers Addr envp_array_base = argv_array_base + argv_array_size; 32110037SARM gem5 Developers Addr arg_data_base = envp_array_base + envp_array_size; 32210037SARM gem5 Developers Addr env_data_base = arg_data_base + arg_data_size; 32310037SARM gem5 Developers 32410037SARM gem5 Developers // write contents to stack 32510037SARM gem5 Developers uint64_t argc = argv.size(); 32610037SARM gem5 Developers if (intSize == 8) 32710037SARM gem5 Developers argc = htog((uint64_t)argc); 32810037SARM gem5 Developers else if (intSize == 4) 32910037SARM gem5 Developers argc = htog((uint32_t)argc); 33010037SARM gem5 Developers else 33110037SARM gem5 Developers panic("Unknown int size"); 33210037SARM gem5 Developers 33310037SARM gem5 Developers initVirtMem->writeBlob(stack_min, (uint8_t*)&argc, intSize); 33410037SARM gem5 Developers 33510037SARM gem5 Developers copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); 33610037SARM gem5 Developers copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); 33710037SARM gem5 Developers 33810037SARM gem5 Developers execContexts[0]->setIntReg(ArgumentReg0, argc); 33910037SARM gem5 Developers execContexts[0]->setIntReg(ArgumentReg1, argv_array_base); 34010037SARM gem5 Developers execContexts[0]->setIntReg(StackPointerReg, stack_min); 34110037SARM gem5 Developers 34210037SARM gem5 Developers Addr prog_entry = objFile->entryPoint(); 34310037SARM gem5 Developers execContexts[0]->setPC(prog_entry); 34410037SARM gem5 Developers execContexts[0]->setNextPC(prog_entry + sizeof(MachInst)); 34510037SARM gem5 Developers execContexts[0]->setNextNPC(prog_entry + (2 * sizeof(MachInst))); 34610037SARM gem5 Developers 34710037SARM gem5 Developers num_processes++; 34810037SARM gem5 Developers} 34910037SARM gem5 Developers 35010037SARM gem5 Developersvoid 35110037SARM gem5 DevelopersLiveProcess::syscall(int64_t callnum, ExecContext *xc) 35210037SARM gem5 Developers{ 35310037SARM gem5 Developers num_syscalls++; 35410037SARM gem5 Developers 35510037SARM gem5 Developers SyscallDesc *desc = getDesc(callnum); 35610037SARM gem5 Developers if (desc == NULL) 35710037SARM gem5 Developers fatal("Syscall %d out of range", callnum); 35810037SARM gem5 Developers 35910037SARM gem5 Developers desc->doSyscall(callnum, this, xc); 36010037SARM gem5 Developers} 36110037SARM gem5 Developers 36210037SARM gem5 DevelopersDEFINE_SIM_OBJECT_CLASS_NAME("LiveProcess", LiveProcess); 36310037SARM gem5 Developers