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Diffstat (limited to 'sim/process.cc')
| -rw-r--r-- | sim/process.cc | 361 |
1 files changed, 0 insertions, 361 deletions
diff --git a/sim/process.cc b/sim/process.cc deleted file mode 100644 index 1261b8436..000000000 --- a/sim/process.cc +++ /dev/null @@ -1,361 +0,0 @@ -/* - * Copyright (c) 2001-2005 The Regents of The University of Michigan - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer; - * redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution; - * neither the name of the copyright holders nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#include <unistd.h> -#include <fcntl.h> - -#include <string> - -#include "base/intmath.hh" -#include "base/loader/object_file.hh" -#include "base/loader/symtab.hh" -#include "base/statistics.hh" -#include "config/full_system.hh" -#include "cpu/exec_context.hh" -#include "mem/page_table.hh" -#include "mem/physical.hh" -#include "mem/translating_port.hh" -#include "sim/builder.hh" -#include "sim/process.hh" -#include "sim/stats.hh" -#include "sim/syscall_emul.hh" -#include "sim/system.hh" - -using namespace std; -using namespace TheISA; - -// -// The purpose of this code is to fake the loader & syscall mechanism -// when there's no OS: thus there's no resone to use it in FULL_SYSTEM -// mode when we do have an OS -// -#if FULL_SYSTEM -#error "process.cc not compatible with FULL_SYSTEM" -#endif - -// current number of allocated processes -int num_processes = 0; - -Process::Process(const string &nm, - System *_system, - int stdin_fd, // initial I/O descriptors - int stdout_fd, - int stderr_fd) - : SimObject(nm), system(_system) -{ - // initialize first 3 fds (stdin, stdout, stderr) - fd_map[STDIN_FILENO] = stdin_fd; - fd_map[STDOUT_FILENO] = stdout_fd; - fd_map[STDERR_FILENO] = stderr_fd; - - // mark remaining fds as free - for (int i = 3; i <= MAX_FD; ++i) { - fd_map[i] = -1; - } - - mmap_start = mmap_end = 0; - nxm_start = nxm_end = 0; - pTable = new PageTable(system); - // other parameters will be initialized when the program is loaded -} - - -void -Process::regStats() -{ - using namespace Stats; - - num_syscalls - .name(name() + ".PROG:num_syscalls") - .desc("Number of system calls") - ; -} - -// -// static helper functions -// -int -Process::openInputFile(const string &filename) -{ - int fd = open(filename.c_str(), O_RDONLY); - - if (fd == -1) { - perror(NULL); - cerr << "unable to open \"" << filename << "\" for reading\n"; - fatal("can't open input file"); - } - - return fd; -} - - -int -Process::openOutputFile(const string &filename) -{ - int fd = open(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC, 0774); - - if (fd == -1) { - perror(NULL); - cerr << "unable to open \"" << filename << "\" for writing\n"; - fatal("can't open output file"); - } - - return fd; -} - - -int -Process::registerExecContext(ExecContext *xc) -{ - // add to list - int myIndex = execContexts.size(); - execContexts.push_back(xc); - - // return CPU number to caller - return myIndex; -} - -void -Process::startup() -{ - if (execContexts.empty()) - fatal("Process %s is not associated with any CPUs!\n", name()); - - // first exec context for this process... initialize & enable - ExecContext *xc = execContexts[0]; - - // mark this context as active so it will start ticking. - xc->activate(0); - - Port *mem_port; - mem_port = system->physmem->getPort("functional"); - initVirtMem = new TranslatingPort(pTable, true); - mem_port->setPeer(initVirtMem); - initVirtMem->setPeer(mem_port); -} - -void -Process::replaceExecContext(ExecContext *xc, int xcIndex) -{ - if (xcIndex >= execContexts.size()) { - panic("replaceExecContext: bad xcIndex, %d >= %d\n", - xcIndex, execContexts.size()); - } - - execContexts[xcIndex] = xc; -} - -// map simulator fd sim_fd to target fd tgt_fd -void -Process::dup_fd(int sim_fd, int tgt_fd) -{ - if (tgt_fd < 0 || tgt_fd > MAX_FD) - panic("Process::dup_fd tried to dup past MAX_FD (%d)", tgt_fd); - - fd_map[tgt_fd] = sim_fd; -} - - -// generate new target fd for sim_fd -int -Process::alloc_fd(int sim_fd) -{ - // in case open() returns an error, don't allocate a new fd - if (sim_fd == -1) - return -1; - - // find first free target fd - for (int free_fd = 0; free_fd < MAX_FD; ++free_fd) { - if (fd_map[free_fd] == -1) { - fd_map[free_fd] = sim_fd; - return free_fd; - } - } - - panic("Process::alloc_fd: out of file descriptors!"); -} - - -// free target fd (e.g., after close) -void -Process::free_fd(int tgt_fd) -{ - if (fd_map[tgt_fd] == -1) - warn("Process::free_fd: request to free unused fd %d", tgt_fd); - - fd_map[tgt_fd] = -1; -} - - -// look up simulator fd for given target fd -int -Process::sim_fd(int tgt_fd) -{ - if (tgt_fd > MAX_FD) - return -1; - - return fd_map[tgt_fd]; -} - - - -// -// need to declare these here since there is no concrete Process type -// that can be constructed (i.e., no REGISTER_SIM_OBJECT() macro call, -// which is where these get declared for concrete types). -// -DEFINE_SIM_OBJECT_CLASS_NAME("Process", Process) - - -//////////////////////////////////////////////////////////////////////// -// -// LiveProcess member definitions -// -//////////////////////////////////////////////////////////////////////// - - -void -copyStringArray(vector<string> &strings, Addr array_ptr, Addr data_ptr, - TranslatingPort* memPort) -{ - Addr data_ptr_swap; - for (int i = 0; i < strings.size(); ++i) { - data_ptr_swap = htog(data_ptr); - memPort->writeBlob(array_ptr, (uint8_t*)&data_ptr_swap, sizeof(Addr)); - memPort->writeString(data_ptr, strings[i].c_str()); - array_ptr += sizeof(Addr); - data_ptr += strings[i].size() + 1; - } - // add NULL terminator - data_ptr = 0; - - memPort->writeBlob(array_ptr, (uint8_t*)&data_ptr, sizeof(Addr)); -} - -LiveProcess::LiveProcess(const string &nm, ObjectFile *_objFile, - System *_system, - int stdin_fd, int stdout_fd, int stderr_fd, - vector<string> &_argv, vector<string> &_envp) - : Process(nm, _system, stdin_fd, stdout_fd, stderr_fd), - objFile(_objFile), argv(_argv), envp(_envp) -{ - prog_fname = argv[0]; - - // load up symbols, if any... these may be used for debugging or - // profiling. - if (!debugSymbolTable) { - debugSymbolTable = new SymbolTable(); - if (!objFile->loadGlobalSymbols(debugSymbolTable) || - !objFile->loadLocalSymbols(debugSymbolTable)) { - // didn't load any symbols - delete debugSymbolTable; - debugSymbolTable = NULL; - } - } -} - -void -LiveProcess::argsInit(int intSize, int pageSize) -{ - Process::startup(); - - // load object file into target memory - objFile->loadSections(initVirtMem); - - // Calculate how much space we need for arg & env arrays. - int argv_array_size = intSize * (argv.size() + 1); - int envp_array_size = intSize * (envp.size() + 1); - int arg_data_size = 0; - for (int i = 0; i < argv.size(); ++i) { - arg_data_size += argv[i].size() + 1; - } - int env_data_size = 0; - for (int i = 0; i < envp.size(); ++i) { - env_data_size += envp[i].size() + 1; - } - - int space_needed = - argv_array_size + envp_array_size + arg_data_size + env_data_size; - // for SimpleScalar compatibility - if (space_needed < 16384) - space_needed = 16384; - - // set bottom of stack - stack_min = stack_base - space_needed; - // align it - stack_min &= ~(intSize-1); - stack_size = stack_base - stack_min; - // map memory - pTable->allocate(roundDown(stack_min, pageSize), - roundUp(stack_size, pageSize)); - - // map out initial stack contents - Addr argv_array_base = stack_min + intSize; // room for argc - Addr envp_array_base = argv_array_base + argv_array_size; - Addr arg_data_base = envp_array_base + envp_array_size; - Addr env_data_base = arg_data_base + arg_data_size; - - // write contents to stack - uint64_t argc = argv.size(); - if (intSize == 8) - argc = htog((uint64_t)argc); - else if (intSize == 4) - argc = htog((uint32_t)argc); - else - panic("Unknown int size"); - - initVirtMem->writeBlob(stack_min, (uint8_t*)&argc, intSize); - - copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); - copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); - - execContexts[0]->setIntReg(ArgumentReg0, argc); - execContexts[0]->setIntReg(ArgumentReg1, argv_array_base); - execContexts[0]->setIntReg(StackPointerReg, stack_min); - - Addr prog_entry = objFile->entryPoint(); - execContexts[0]->setPC(prog_entry); - execContexts[0]->setNextPC(prog_entry + sizeof(MachInst)); - execContexts[0]->setNextNPC(prog_entry + (2 * sizeof(MachInst))); - - num_processes++; -} - -void -LiveProcess::syscall(int64_t callnum, ExecContext *xc) -{ - num_syscalls++; - - SyscallDesc *desc = getDesc(callnum); - if (desc == NULL) - fatal("Syscall %d out of range", callnum); - - desc->doSyscall(callnum, this, xc); -} - -DEFINE_SIM_OBJECT_CLASS_NAME("LiveProcess", LiveProcess); |