process.cc revision 11905
12SN/A/* 211856Sbrandon.potter@amd.com * Copyright (c) 2014-2016 Advanced Micro Devices, Inc. 38852Sandreas.hansson@arm.com * Copyright (c) 2012 ARM Limited 48852Sandreas.hansson@arm.com * All rights reserved 58852Sandreas.hansson@arm.com * 68852Sandreas.hansson@arm.com * The license below extends only to copyright in the software and shall 78852Sandreas.hansson@arm.com * not be construed as granting a license to any other intellectual 88852Sandreas.hansson@arm.com * property including but not limited to intellectual property relating 98852Sandreas.hansson@arm.com * to a hardware implementation of the functionality of the software 108852Sandreas.hansson@arm.com * licensed hereunder. You may use the software subject to the license 118852Sandreas.hansson@arm.com * terms below provided that you ensure that this notice is replicated 128852Sandreas.hansson@arm.com * unmodified and in its entirety in all distributions of the software, 138852Sandreas.hansson@arm.com * modified or unmodified, in source code or in binary form. 148852Sandreas.hansson@arm.com * 151762SN/A * Copyright (c) 2001-2005 The Regents of The University of Michigan 162SN/A * All rights reserved. 172SN/A * 182SN/A * Redistribution and use in source and binary forms, with or without 192SN/A * modification, are permitted provided that the following conditions are 202SN/A * met: redistributions of source code must retain the above copyright 212SN/A * notice, this list of conditions and the following disclaimer; 222SN/A * redistributions in binary form must reproduce the above copyright 232SN/A * notice, this list of conditions and the following disclaimer in the 242SN/A * documentation and/or other materials provided with the distribution; 252SN/A * neither the name of the copyright holders nor the names of its 262SN/A * contributors may be used to endorse or promote products derived from 272SN/A * this software without specific prior written permission. 282SN/A * 292SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 302SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 312SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 322SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 332SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 342SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 352SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 362SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 372SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 382SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 392SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 402665Ssaidi@eecs.umich.edu * 412665Ssaidi@eecs.umich.edu * Authors: Nathan Binkert 422665Ssaidi@eecs.umich.edu * Steve Reinhardt 432665Ssaidi@eecs.umich.edu * Ali Saidi 4411856Sbrandon.potter@amd.com * Brandon Potter 452SN/A */ 462SN/A 4711793Sbrandon.potter@amd.com#include "sim/process.hh" 4811793Sbrandon.potter@amd.com 498229Snate@binkert.org#include <fcntl.h> 502SN/A#include <unistd.h> 516712Snate@binkert.org 5211800Sbrandon.potter@amd.com#include <array> 5310930Sbrandon.potter@amd.com#include <map> 542SN/A#include <string> 5511800Sbrandon.potter@amd.com#include <vector> 562SN/A 5711793Sbrandon.potter@amd.com#include "base/intmath.hh" 5856SN/A#include "base/loader/object_file.hh" 591158SN/A#include "base/loader/symtab.hh" 60146SN/A#include "base/statistics.hh" 616658Snate@binkert.org#include "config/the_isa.hh" 622680Sktlim@umich.edu#include "cpu/thread_context.hh" 632378SN/A#include "mem/page_table.hh" 648706Sandreas.hansson@arm.com#include "mem/se_translating_port_proxy.hh" 655154Sgblack@eecs.umich.edu#include "params/Process.hh" 6611800Sbrandon.potter@amd.com#include "sim/emul_driver.hh" 6711856Sbrandon.potter@amd.com#include "sim/fd_array.hh" 6811856Sbrandon.potter@amd.com#include "sim/fd_entry.hh" 6911794Sbrandon.potter@amd.com#include "sim/syscall_desc.hh" 702378SN/A#include "sim/system.hh" 712SN/A 722715Sstever@eecs.umich.edu#if THE_ISA == ALPHA_ISA 732715Sstever@eecs.umich.edu#include "arch/alpha/linux/process.hh" 742715Sstever@eecs.umich.edu#elif THE_ISA == SPARC_ISA 752715Sstever@eecs.umich.edu#include "arch/sparc/linux/process.hh" 762715Sstever@eecs.umich.edu#include "arch/sparc/solaris/process.hh" 772715Sstever@eecs.umich.edu#elif THE_ISA == MIPS_ISA 782715Sstever@eecs.umich.edu#include "arch/mips/linux/process.hh" 795335Shines@cs.fsu.edu#elif THE_ISA == ARM_ISA 805335Shines@cs.fsu.edu#include "arch/arm/linux/process.hh" 8110810Sbr@bsdpad.com#include "arch/arm/freebsd/process.hh" 824157Sgblack@eecs.umich.edu#elif THE_ISA == X86_ISA 834166Sgblack@eecs.umich.edu#include "arch/x86/linux/process.hh" 846691Stjones1@inf.ed.ac.uk#elif THE_ISA == POWER_ISA 856691Stjones1@inf.ed.ac.uk#include "arch/power/linux/process.hh" 8611723Sar4jc@virginia.edu#elif THE_ISA == RISCV_ISA 8711723Sar4jc@virginia.edu#include "arch/riscv/linux/process.hh" 882715Sstever@eecs.umich.edu#else 892715Sstever@eecs.umich.edu#error "THE_ISA not set" 902715Sstever@eecs.umich.edu#endif 912715Sstever@eecs.umich.edu 922715Sstever@eecs.umich.edu 932SN/Ausing namespace std; 942107SN/Ausing namespace TheISA; 952SN/A 9611851Sbrandon.potter@amd.comProcess::Process(ProcessParams * params, ObjectFile * obj_file) 977532Ssteve.reinhardt@amd.com : SimObject(params), system(params->system), 9810299Salexandru.dutu@amd.com useArchPT(params->useArchPT), 9910554Salexandru.dutu@amd.com kvmInSE(params->kvmInSE), 10010299Salexandru.dutu@amd.com pTable(useArchPT ? 10111813Sbaz21@cam.ac.uk static_cast<PageTableBase *>(new ArchPageTable(name(), params->pid, 10211813Sbaz21@cam.ac.uk system)) : 10311813Sbaz21@cam.ac.uk static_cast<PageTableBase *>(new FuncPageTable(name(), params->pid))), 1048852Sandreas.hansson@arm.com initVirtMem(system->getSystemPort(), this, 10510929Sbrandon.potter@amd.com SETranslatingPortProxy::Always), 10611851Sbrandon.potter@amd.com objFile(obj_file), 10711851Sbrandon.potter@amd.com argv(params->cmd), envp(params->env), cwd(params->cwd), 10811851Sbrandon.potter@amd.com executable(params->executable), 10911801Sbrandon.potter@amd.com _uid(params->uid), _euid(params->euid), 11011801Sbrandon.potter@amd.com _gid(params->gid), _egid(params->egid), 11111851Sbrandon.potter@amd.com _pid(params->pid), _ppid(params->ppid), 11211885Sbrandon.potter@amd.com _pgid(params->pgid), drivers(params->drivers), 11311886Sbrandon.potter@amd.com fds(make_shared<FDArray>(params->input, params->output, params->errout)), 11411886Sbrandon.potter@amd.com childClearTID(0) 1152SN/A{ 11611885Sbrandon.potter@amd.com if (_pid >= System::maxPID) 11711885Sbrandon.potter@amd.com fatal("_pid is too large: %d", _pid); 11811885Sbrandon.potter@amd.com 11911885Sbrandon.potter@amd.com auto ret_pair = system->PIDs.emplace(_pid); 12011885Sbrandon.potter@amd.com if (!ret_pair.second) 12111885Sbrandon.potter@amd.com fatal("_pid %d is already used", _pid); 12211885Sbrandon.potter@amd.com 12311886Sbrandon.potter@amd.com /** 12411886Sbrandon.potter@amd.com * Linux bundles together processes into this concept called a thread 12511886Sbrandon.potter@amd.com * group. The thread group is responsible for recording which processes 12611886Sbrandon.potter@amd.com * behave as threads within a process context. The thread group leader 12711886Sbrandon.potter@amd.com * is the process who's tgid is equal to its pid. Other processes which 12811886Sbrandon.potter@amd.com * belong to the thread group, but do not lead the thread group, are 12911886Sbrandon.potter@amd.com * treated as child threads. These threads are created by the clone system 13011886Sbrandon.potter@amd.com * call with options specified to create threads (differing from the 13111886Sbrandon.potter@amd.com * options used to implement a fork). By default, set up the tgid/pid 13211886Sbrandon.potter@amd.com * with a new, equivalent value. If CLONE_THREAD is specified, patch 13311886Sbrandon.potter@amd.com * the tgid value with the old process' value. 13411886Sbrandon.potter@amd.com */ 13511886Sbrandon.potter@amd.com _tgid = params->pid; 13611886Sbrandon.potter@amd.com 13711886Sbrandon.potter@amd.com exitGroup = new bool(); 13811886Sbrandon.potter@amd.com sigchld = new bool(); 13911886Sbrandon.potter@amd.com 14011851Sbrandon.potter@amd.com if (!debugSymbolTable) { 14111851Sbrandon.potter@amd.com debugSymbolTable = new SymbolTable(); 14211851Sbrandon.potter@amd.com if (!objFile->loadGlobalSymbols(debugSymbolTable) || 14311851Sbrandon.potter@amd.com !objFile->loadLocalSymbols(debugSymbolTable) || 14411851Sbrandon.potter@amd.com !objFile->loadWeakSymbols(debugSymbolTable)) { 14511851Sbrandon.potter@amd.com delete debugSymbolTable; 14611851Sbrandon.potter@amd.com debugSymbolTable = NULL; 14711851Sbrandon.potter@amd.com } 14811851Sbrandon.potter@amd.com } 1492SN/A} 1502SN/A 1512SN/Avoid 15211886Sbrandon.potter@amd.comProcess::clone(ThreadContext *otc, ThreadContext *ntc, 15311886Sbrandon.potter@amd.com Process *np, TheISA::IntReg flags) 15411886Sbrandon.potter@amd.com{ 15511886Sbrandon.potter@amd.com if (CLONE_VM & flags) { 15611886Sbrandon.potter@amd.com /** 15711886Sbrandon.potter@amd.com * Share the process memory address space between the new process 15811886Sbrandon.potter@amd.com * and the old process. Changes in one will be visible in the other 15911886Sbrandon.potter@amd.com * due to the pointer use. 16011886Sbrandon.potter@amd.com */ 16111886Sbrandon.potter@amd.com delete np->pTable; 16211886Sbrandon.potter@amd.com np->pTable = pTable; 16311886Sbrandon.potter@amd.com ntc->getMemProxy().setPageTable(np->pTable); 16411886Sbrandon.potter@amd.com 16511886Sbrandon.potter@amd.com np->memState = memState; 16611886Sbrandon.potter@amd.com } else { 16711886Sbrandon.potter@amd.com /** 16811886Sbrandon.potter@amd.com * Duplicate the process memory address space. The state needs to be 16911886Sbrandon.potter@amd.com * copied over (rather than using pointers to share everything). 17011886Sbrandon.potter@amd.com */ 17111886Sbrandon.potter@amd.com typedef std::vector<pair<Addr,Addr>> MapVec; 17211886Sbrandon.potter@amd.com MapVec mappings; 17311886Sbrandon.potter@amd.com pTable->getMappings(&mappings); 17411886Sbrandon.potter@amd.com 17511886Sbrandon.potter@amd.com for (auto map : mappings) { 17611886Sbrandon.potter@amd.com Addr paddr, vaddr = map.first; 17711886Sbrandon.potter@amd.com bool alloc_page = !(np->pTable->translate(vaddr, paddr)); 17811886Sbrandon.potter@amd.com np->replicatePage(vaddr, paddr, otc, ntc, alloc_page); 17911886Sbrandon.potter@amd.com } 18011886Sbrandon.potter@amd.com 18111886Sbrandon.potter@amd.com *np->memState = *memState; 18211886Sbrandon.potter@amd.com } 18311886Sbrandon.potter@amd.com 18411886Sbrandon.potter@amd.com if (CLONE_FILES & flags) { 18511886Sbrandon.potter@amd.com /** 18611886Sbrandon.potter@amd.com * The parent and child file descriptors are shared because the 18711886Sbrandon.potter@amd.com * two FDArray pointers are pointing to the same FDArray. Opening 18811886Sbrandon.potter@amd.com * and closing file descriptors will be visible to both processes. 18911886Sbrandon.potter@amd.com */ 19011886Sbrandon.potter@amd.com np->fds = fds; 19111886Sbrandon.potter@amd.com } else { 19211886Sbrandon.potter@amd.com /** 19311886Sbrandon.potter@amd.com * Copy the file descriptors from the old process into the new 19411886Sbrandon.potter@amd.com * child process. The file descriptors entry can be opened and 19511886Sbrandon.potter@amd.com * closed independently of the other process being considered. The 19611886Sbrandon.potter@amd.com * host file descriptors are also dup'd so that the flags for the 19711886Sbrandon.potter@amd.com * host file descriptor is independent of the other process. 19811886Sbrandon.potter@amd.com */ 19911886Sbrandon.potter@amd.com for (int tgt_fd = 0; tgt_fd < fds->getSize(); tgt_fd++) { 20011886Sbrandon.potter@amd.com std::shared_ptr<FDArray> nfds = np->fds; 20111886Sbrandon.potter@amd.com std::shared_ptr<FDEntry> this_fde = (*fds)[tgt_fd]; 20211886Sbrandon.potter@amd.com if (!this_fde) { 20311886Sbrandon.potter@amd.com nfds->setFDEntry(tgt_fd, nullptr); 20411886Sbrandon.potter@amd.com continue; 20511886Sbrandon.potter@amd.com } 20611886Sbrandon.potter@amd.com nfds->setFDEntry(tgt_fd, this_fde->clone()); 20711886Sbrandon.potter@amd.com 20811886Sbrandon.potter@amd.com auto this_hbfd = std::dynamic_pointer_cast<HBFDEntry>(this_fde); 20911886Sbrandon.potter@amd.com if (!this_hbfd) 21011886Sbrandon.potter@amd.com continue; 21111886Sbrandon.potter@amd.com 21211886Sbrandon.potter@amd.com int this_sim_fd = this_hbfd->getSimFD(); 21311886Sbrandon.potter@amd.com if (this_sim_fd <= 2) 21411886Sbrandon.potter@amd.com continue; 21511886Sbrandon.potter@amd.com 21611886Sbrandon.potter@amd.com int np_sim_fd = dup(this_sim_fd); 21711886Sbrandon.potter@amd.com assert(np_sim_fd != -1); 21811886Sbrandon.potter@amd.com 21911886Sbrandon.potter@amd.com auto nhbfd = std::dynamic_pointer_cast<HBFDEntry>((*nfds)[tgt_fd]); 22011886Sbrandon.potter@amd.com nhbfd->setSimFD(np_sim_fd); 22111886Sbrandon.potter@amd.com } 22211886Sbrandon.potter@amd.com } 22311886Sbrandon.potter@amd.com 22411886Sbrandon.potter@amd.com if (CLONE_THREAD & flags) { 22511886Sbrandon.potter@amd.com np->_tgid = _tgid; 22611886Sbrandon.potter@amd.com delete np->exitGroup; 22711886Sbrandon.potter@amd.com np->exitGroup = exitGroup; 22811886Sbrandon.potter@amd.com } 22911886Sbrandon.potter@amd.com 23011886Sbrandon.potter@amd.com np->argv.insert(np->argv.end(), argv.begin(), argv.end()); 23111886Sbrandon.potter@amd.com np->envp.insert(np->envp.end(), envp.begin(), envp.end()); 23211886Sbrandon.potter@amd.com} 23311886Sbrandon.potter@amd.com 23411886Sbrandon.potter@amd.comvoid 2352SN/AProcess::regStats() 2362SN/A{ 23711522Sstephan.diestelhorst@arm.com SimObject::regStats(); 23811522Sstephan.diestelhorst@arm.com 239729SN/A using namespace Stats; 2402SN/A 24111886Sbrandon.potter@amd.com numSyscalls 24211886Sbrandon.potter@amd.com .name(name() + ".numSyscalls") 2432SN/A .desc("Number of system calls") 2442SN/A ; 2452SN/A} 2462SN/A 2475713Shsul@eecs.umich.eduThreadContext * 2485713Shsul@eecs.umich.eduProcess::findFreeContext() 2492SN/A{ 25011886Sbrandon.potter@amd.com for (auto &it : system->threadContexts) { 25111886Sbrandon.potter@amd.com if (ThreadContext::Halted == it->status()) 25211886Sbrandon.potter@amd.com return it; 2535512SMichael.Adler@intel.com } 2545713Shsul@eecs.umich.edu return NULL; 2552SN/A} 2562SN/A 2571395SN/Avoid 25811886Sbrandon.potter@amd.comProcess::revokeThreadContext(int context_id) 25911886Sbrandon.potter@amd.com{ 26011886Sbrandon.potter@amd.com std::vector<ContextID>::iterator it; 26111886Sbrandon.potter@amd.com for (it = contextIds.begin(); it != contextIds.end(); it++) { 26211886Sbrandon.potter@amd.com if (*it == context_id) { 26311886Sbrandon.potter@amd.com contextIds.erase(it); 26411886Sbrandon.potter@amd.com return; 26511886Sbrandon.potter@amd.com } 26611886Sbrandon.potter@amd.com } 26711886Sbrandon.potter@amd.com warn("Unable to find thread context to revoke"); 26811886Sbrandon.potter@amd.com} 26911886Sbrandon.potter@amd.com 27011886Sbrandon.potter@amd.comvoid 2717532Ssteve.reinhardt@amd.comProcess::initState() 2721395SN/A{ 2735713Shsul@eecs.umich.edu if (contextIds.empty()) 2745713Shsul@eecs.umich.edu fatal("Process %s is not associated with any HW contexts!\n", name()); 2752378SN/A 2762680Sktlim@umich.edu // first thread context for this process... initialize & enable 2775713Shsul@eecs.umich.edu ThreadContext *tc = system->getThreadContext(contextIds[0]); 2781395SN/A 2791634SN/A // mark this context as active so it will start ticking. 28010407Smitch.hayenga@arm.com tc->activate(); 28110298Salexandru.dutu@amd.com 28210298Salexandru.dutu@amd.com pTable->initState(tc); 2831395SN/A} 2842SN/A 28510913Sandreas.sandberg@arm.comDrainState 28610913Sandreas.sandberg@arm.comProcess::drain() 28710905Sandreas.sandberg@arm.com{ 28811856Sbrandon.potter@amd.com fds->updateFileOffsets(); 28910913Sandreas.sandberg@arm.com return DrainState::Drained; 29010905Sandreas.sandberg@arm.com} 29110905Sandreas.sandberg@arm.com 2928601Ssteve.reinhardt@amd.comvoid 2938601Ssteve.reinhardt@amd.comProcess::allocateMem(Addr vaddr, int64_t size, bool clobber) 2948601Ssteve.reinhardt@amd.com{ 29510318Sandreas.hansson@arm.com int npages = divCeil(size, (int64_t)PageBytes); 2968601Ssteve.reinhardt@amd.com Addr paddr = system->allocPhysPages(npages); 29711294Sandreas.hansson@arm.com pTable->map(vaddr, paddr, size, 29811294Sandreas.hansson@arm.com clobber ? PageTableBase::Clobber : PageTableBase::Zero); 2998601Ssteve.reinhardt@amd.com} 3008601Ssteve.reinhardt@amd.com 30111886Sbrandon.potter@amd.comvoid 30211886Sbrandon.potter@amd.comProcess::replicatePage(Addr vaddr, Addr new_paddr, ThreadContext *old_tc, 30311886Sbrandon.potter@amd.com ThreadContext *new_tc, bool allocate_page) 30411886Sbrandon.potter@amd.com{ 30511886Sbrandon.potter@amd.com if (allocate_page) 30611886Sbrandon.potter@amd.com new_paddr = system->allocPhysPages(1); 30711886Sbrandon.potter@amd.com 30811886Sbrandon.potter@amd.com // Read from old physical page. 30911886Sbrandon.potter@amd.com uint8_t *buf_p = new uint8_t[PageBytes]; 31011886Sbrandon.potter@amd.com old_tc->getMemProxy().readBlob(vaddr, buf_p, PageBytes); 31111886Sbrandon.potter@amd.com 31211886Sbrandon.potter@amd.com // Create new mapping in process address space by clobbering existing 31311886Sbrandon.potter@amd.com // mapping (if any existed) and then write to the new physical page. 31411886Sbrandon.potter@amd.com bool clobber = true; 31511886Sbrandon.potter@amd.com pTable->map(vaddr, new_paddr, PageBytes, clobber); 31611886Sbrandon.potter@amd.com new_tc->getMemProxy().writeBlob(vaddr, buf_p, PageBytes); 31711886Sbrandon.potter@amd.com delete[] buf_p; 31811886Sbrandon.potter@amd.com} 31911886Sbrandon.potter@amd.com 3204434Ssaidi@eecs.umich.edubool 3218539Sgblack@eecs.umich.eduProcess::fixupStackFault(Addr vaddr) 3224434Ssaidi@eecs.umich.edu{ 32311905SBrandon.Potter@amd.com Addr stack_min = memState->getStackMin(); 32411905SBrandon.Potter@amd.com Addr stack_base = memState->getStackBase(); 32511905SBrandon.Potter@amd.com Addr max_stack_size = memState->getMaxStackSize(); 32611905SBrandon.Potter@amd.com 3278539Sgblack@eecs.umich.edu // Check if this is already on the stack and there's just no page there 3288539Sgblack@eecs.umich.edu // yet. 32911905SBrandon.Potter@amd.com if (vaddr >= stack_min && vaddr < stack_base) { 33010318Sandreas.hansson@arm.com allocateMem(roundDown(vaddr, PageBytes), PageBytes); 3314434Ssaidi@eecs.umich.edu return true; 3324434Ssaidi@eecs.umich.edu } 3334434Ssaidi@eecs.umich.edu 3348539Sgblack@eecs.umich.edu // We've accessed the next page of the stack, so extend it to include 3358539Sgblack@eecs.umich.edu // this address. 33611905SBrandon.Potter@amd.com if (vaddr < stack_min && vaddr >= stack_base - max_stack_size) { 33711905SBrandon.Potter@amd.com while (vaddr < stack_min) { 33811905SBrandon.Potter@amd.com stack_min -= TheISA::PageBytes; 33911905SBrandon.Potter@amd.com if (stack_base - stack_min > max_stack_size) 3405154Sgblack@eecs.umich.edu fatal("Maximum stack size exceeded\n"); 34111905SBrandon.Potter@amd.com allocateMem(stack_min, TheISA::PageBytes); 3425823Ssaidi@eecs.umich.edu inform("Increasing stack size by one page."); 3435154Sgblack@eecs.umich.edu }; 34411905SBrandon.Potter@amd.com memState->setStackMin(stack_min); 3454434Ssaidi@eecs.umich.edu return true; 3464434Ssaidi@eecs.umich.edu } 3474434Ssaidi@eecs.umich.edu return false; 3484434Ssaidi@eecs.umich.edu} 3494434Ssaidi@eecs.umich.edu 3505282Srstrong@cs.ucsd.eduvoid 35110905Sandreas.sandberg@arm.comProcess::serialize(CheckpointOut &cp) const 3523311Ssaidi@eecs.umich.edu{ 35310905Sandreas.sandberg@arm.com pTable->serialize(cp); 35411856Sbrandon.potter@amd.com /** 35511856Sbrandon.potter@amd.com * Checkpoints for file descriptors currently do not work. Need to 35611856Sbrandon.potter@amd.com * come back and fix them at a later date. 35711856Sbrandon.potter@amd.com */ 35811856Sbrandon.potter@amd.com 35911856Sbrandon.potter@amd.com warn("Checkpoints for file descriptors currently do not work."); 36011856Sbrandon.potter@amd.com#if 0 36111856Sbrandon.potter@amd.com for (int x = 0; x < fds->getSize(); x++) 36211856Sbrandon.potter@amd.com (*fds)[x].serializeSection(cp, csprintf("FDEntry%d", x)); 36311856Sbrandon.potter@amd.com#endif 3643311Ssaidi@eecs.umich.edu 3653311Ssaidi@eecs.umich.edu} 3663311Ssaidi@eecs.umich.edu 3673311Ssaidi@eecs.umich.eduvoid 36810905Sandreas.sandberg@arm.comProcess::unserialize(CheckpointIn &cp) 3693311Ssaidi@eecs.umich.edu{ 37010905Sandreas.sandberg@arm.com pTable->unserialize(cp); 37111856Sbrandon.potter@amd.com /** 37211856Sbrandon.potter@amd.com * Checkpoints for file descriptors currently do not work. Need to 37311856Sbrandon.potter@amd.com * come back and fix them at a later date. 37411856Sbrandon.potter@amd.com */ 37511856Sbrandon.potter@amd.com warn("Checkpoints for file descriptors currently do not work."); 37611856Sbrandon.potter@amd.com#if 0 37711856Sbrandon.potter@amd.com for (int x = 0; x < fds->getSize(); x++) 37811856Sbrandon.potter@amd.com (*fds)[x]->unserializeSection(cp, csprintf("FDEntry%d", x)); 37911856Sbrandon.potter@amd.com fds->restoreFileOffsets(); 38011856Sbrandon.potter@amd.com#endif 3816820SLisa.Hsu@amd.com // The above returns a bool so that you could do something if you don't 3826820SLisa.Hsu@amd.com // find the param in the checkpoint if you wanted to, like set a default 38310930Sbrandon.potter@amd.com // but in this case we'll just stick with the instantiated value if not 38410929Sbrandon.potter@amd.com // found. 3853311Ssaidi@eecs.umich.edu} 3862SN/A 3879110Ssteve.reinhardt@amd.combool 38810558Salexandru.dutu@amd.comProcess::map(Addr vaddr, Addr paddr, int size, bool cacheable) 3899110Ssteve.reinhardt@amd.com{ 39010558Salexandru.dutu@amd.com pTable->map(vaddr, paddr, size, 39111294Sandreas.hansson@arm.com cacheable ? PageTableBase::Zero : PageTableBase::Uncacheable); 3929110Ssteve.reinhardt@amd.com return true; 3939110Ssteve.reinhardt@amd.com} 3949110Ssteve.reinhardt@amd.com 3952378SN/Avoid 39611877Sbrandon.potter@amd.comProcess::syscall(int64_t callnum, ThreadContext *tc, Fault *fault) 3972093SN/A{ 39811886Sbrandon.potter@amd.com numSyscalls++; 3992093SN/A 4002093SN/A SyscallDesc *desc = getDesc(callnum); 4012093SN/A if (desc == NULL) 4022093SN/A fatal("Syscall %d out of range", callnum); 4032093SN/A 40411877Sbrandon.potter@amd.com desc->doSyscall(callnum, this, tc, fault); 4052093SN/A} 4062SN/A 4076701Sgblack@eecs.umich.eduIntReg 40811851Sbrandon.potter@amd.comProcess::getSyscallArg(ThreadContext *tc, int &i, int width) 4096701Sgblack@eecs.umich.edu{ 4106701Sgblack@eecs.umich.edu return getSyscallArg(tc, i); 4116701Sgblack@eecs.umich.edu} 4126701Sgblack@eecs.umich.edu 41310496Ssteve.reinhardt@amd.comEmulatedDriver * 41411851Sbrandon.potter@amd.comProcess::findDriver(std::string filename) 41510496Ssteve.reinhardt@amd.com{ 41610496Ssteve.reinhardt@amd.com for (EmulatedDriver *d : drivers) { 41710496Ssteve.reinhardt@amd.com if (d->match(filename)) 41810496Ssteve.reinhardt@amd.com return d; 41910496Ssteve.reinhardt@amd.com } 42010496Ssteve.reinhardt@amd.com 42110496Ssteve.reinhardt@amd.com return NULL; 42210496Ssteve.reinhardt@amd.com} 42310496Ssteve.reinhardt@amd.com 42411389Sbrandon.potter@amd.comvoid 42511851Sbrandon.potter@amd.comProcess::updateBias() 42611389Sbrandon.potter@amd.com{ 42711389Sbrandon.potter@amd.com ObjectFile *interp = objFile->getInterpreter(); 42811389Sbrandon.potter@amd.com 42911389Sbrandon.potter@amd.com if (!interp || !interp->relocatable()) 43011389Sbrandon.potter@amd.com return; 43111389Sbrandon.potter@amd.com 43211389Sbrandon.potter@amd.com // Determine how large the interpreters footprint will be in the process 43311389Sbrandon.potter@amd.com // address space. 43411389Sbrandon.potter@amd.com Addr interp_mapsize = roundUp(interp->mapSize(), TheISA::PageBytes); 43511389Sbrandon.potter@amd.com 43611389Sbrandon.potter@amd.com // We are allocating the memory area; set the bias to the lowest address 43711389Sbrandon.potter@amd.com // in the allocated memory region. 43811905SBrandon.Potter@amd.com Addr mmap_end = memState->getMmapEnd(); 43911905SBrandon.Potter@amd.com Addr ld_bias = mmapGrowsDown() ? mmap_end - interp_mapsize : mmap_end; 44011389Sbrandon.potter@amd.com 44111389Sbrandon.potter@amd.com // Adjust the process mmap area to give the interpreter room; the real 44211389Sbrandon.potter@amd.com // execve system call would just invoke the kernel's internal mmap 44311389Sbrandon.potter@amd.com // functions to make these adjustments. 44411905SBrandon.Potter@amd.com mmap_end = mmapGrowsDown() ? ld_bias : mmap_end + interp_mapsize; 44511905SBrandon.Potter@amd.com memState->setMmapEnd(mmap_end); 44611389Sbrandon.potter@amd.com 44711389Sbrandon.potter@amd.com interp->updateBias(ld_bias); 44811389Sbrandon.potter@amd.com} 44911389Sbrandon.potter@amd.com 45011392Sbrandon.potter@amd.comObjectFile * 45111851Sbrandon.potter@amd.comProcess::getInterpreter() 45211392Sbrandon.potter@amd.com{ 45311392Sbrandon.potter@amd.com return objFile->getInterpreter(); 45411392Sbrandon.potter@amd.com} 45511392Sbrandon.potter@amd.com 45611389Sbrandon.potter@amd.comAddr 45711851Sbrandon.potter@amd.comProcess::getBias() 45811389Sbrandon.potter@amd.com{ 45911392Sbrandon.potter@amd.com ObjectFile *interp = getInterpreter(); 46011389Sbrandon.potter@amd.com 46111389Sbrandon.potter@amd.com return interp ? interp->bias() : objFile->bias(); 46211389Sbrandon.potter@amd.com} 46311389Sbrandon.potter@amd.com 46411389Sbrandon.potter@amd.comAddr 46511851Sbrandon.potter@amd.comProcess::getStartPC() 46611389Sbrandon.potter@amd.com{ 46711392Sbrandon.potter@amd.com ObjectFile *interp = getInterpreter(); 46811389Sbrandon.potter@amd.com 46911389Sbrandon.potter@amd.com return interp ? interp->entryPoint() : objFile->entryPoint(); 47011389Sbrandon.potter@amd.com} 47111389Sbrandon.potter@amd.com 47211851Sbrandon.potter@amd.comProcess * 47311851Sbrandon.potter@amd.comProcessParams::create() 4742715Sstever@eecs.umich.edu{ 47511851Sbrandon.potter@amd.com Process *process = NULL; 4762715Sstever@eecs.umich.edu 47711140Sjthestness@gmail.com // If not specified, set the executable parameter equal to the 47811140Sjthestness@gmail.com // simulated system's zeroth command line parameter 47911851Sbrandon.potter@amd.com if (executable == "") { 48011851Sbrandon.potter@amd.com executable = cmd[0]; 48111140Sjthestness@gmail.com } 48211140Sjthestness@gmail.com 48311851Sbrandon.potter@amd.com ObjectFile *obj_file = createObjectFile(executable); 48411851Sbrandon.potter@amd.com if (obj_file == NULL) { 48511851Sbrandon.potter@amd.com fatal("Can't load object file %s", executable); 4862715Sstever@eecs.umich.edu } 4872715Sstever@eecs.umich.edu 4885089Sgblack@eecs.umich.edu#if THE_ISA == ALPHA_ISA 48911851Sbrandon.potter@amd.com if (obj_file->getArch() != ObjectFile::Alpha) 4905753Ssteve.reinhardt@amd.com fatal("Object file architecture does not match compiled ISA (Alpha)."); 4915753Ssteve.reinhardt@amd.com 49211851Sbrandon.potter@amd.com switch (obj_file->getOpSys()) { 4935753Ssteve.reinhardt@amd.com case ObjectFile::UnknownOpSys: 4945753Ssteve.reinhardt@amd.com warn("Unknown operating system; assuming Linux."); 4955753Ssteve.reinhardt@amd.com // fall through 4962715Sstever@eecs.umich.edu case ObjectFile::Linux: 49711851Sbrandon.potter@amd.com process = new AlphaLinuxProcess(this, obj_file); 4982715Sstever@eecs.umich.edu break; 4992715Sstever@eecs.umich.edu 5002715Sstever@eecs.umich.edu default: 5012715Sstever@eecs.umich.edu fatal("Unknown/unsupported operating system."); 5022715Sstever@eecs.umich.edu } 5032715Sstever@eecs.umich.edu#elif THE_ISA == SPARC_ISA 50411851Sbrandon.potter@amd.com if (obj_file->getArch() != ObjectFile::SPARC64 && 50511851Sbrandon.potter@amd.com obj_file->getArch() != ObjectFile::SPARC32) 5062715Sstever@eecs.umich.edu fatal("Object file architecture does not match compiled ISA (SPARC)."); 50711851Sbrandon.potter@amd.com switch (obj_file->getOpSys()) { 5085753Ssteve.reinhardt@amd.com case ObjectFile::UnknownOpSys: 5095753Ssteve.reinhardt@amd.com warn("Unknown operating system; assuming Linux."); 5105753Ssteve.reinhardt@amd.com // fall through 5112715Sstever@eecs.umich.edu case ObjectFile::Linux: 51211851Sbrandon.potter@amd.com if (obj_file->getArch() == ObjectFile::SPARC64) { 51311851Sbrandon.potter@amd.com process = new Sparc64LinuxProcess(this, obj_file); 5144111Sgblack@eecs.umich.edu } else { 51511851Sbrandon.potter@amd.com process = new Sparc32LinuxProcess(this, obj_file); 5164111Sgblack@eecs.umich.edu } 5172715Sstever@eecs.umich.edu break; 5182715Sstever@eecs.umich.edu 5192715Sstever@eecs.umich.edu case ObjectFile::Solaris: 52011851Sbrandon.potter@amd.com process = new SparcSolarisProcess(this, obj_file); 5212715Sstever@eecs.umich.edu break; 5225753Ssteve.reinhardt@amd.com 5232715Sstever@eecs.umich.edu default: 5242715Sstever@eecs.umich.edu fatal("Unknown/unsupported operating system."); 5252715Sstever@eecs.umich.edu } 5264157Sgblack@eecs.umich.edu#elif THE_ISA == X86_ISA 52711851Sbrandon.potter@amd.com if (obj_file->getArch() != ObjectFile::X86_64 && 52811851Sbrandon.potter@amd.com obj_file->getArch() != ObjectFile::I386) 5294166Sgblack@eecs.umich.edu fatal("Object file architecture does not match compiled ISA (x86)."); 53011851Sbrandon.potter@amd.com switch (obj_file->getOpSys()) { 5315753Ssteve.reinhardt@amd.com case ObjectFile::UnknownOpSys: 5325753Ssteve.reinhardt@amd.com warn("Unknown operating system; assuming Linux."); 5335753Ssteve.reinhardt@amd.com // fall through 5344166Sgblack@eecs.umich.edu case ObjectFile::Linux: 53511851Sbrandon.potter@amd.com if (obj_file->getArch() == ObjectFile::X86_64) { 53611851Sbrandon.potter@amd.com process = new X86_64LinuxProcess(this, obj_file); 5375874Sgblack@eecs.umich.edu } else { 53811851Sbrandon.potter@amd.com process = new I386LinuxProcess(this, obj_file); 5395874Sgblack@eecs.umich.edu } 5404166Sgblack@eecs.umich.edu break; 5415753Ssteve.reinhardt@amd.com 5424157Sgblack@eecs.umich.edu default: 5434157Sgblack@eecs.umich.edu fatal("Unknown/unsupported operating system."); 5444157Sgblack@eecs.umich.edu } 5452715Sstever@eecs.umich.edu#elif THE_ISA == MIPS_ISA 54611851Sbrandon.potter@amd.com if (obj_file->getArch() != ObjectFile::Mips) 5472715Sstever@eecs.umich.edu fatal("Object file architecture does not match compiled ISA (MIPS)."); 54811851Sbrandon.potter@amd.com switch (obj_file->getOpSys()) { 5495753Ssteve.reinhardt@amd.com case ObjectFile::UnknownOpSys: 5505753Ssteve.reinhardt@amd.com warn("Unknown operating system; assuming Linux."); 5515753Ssteve.reinhardt@amd.com // fall through 5522715Sstever@eecs.umich.edu case ObjectFile::Linux: 55311851Sbrandon.potter@amd.com process = new MipsLinuxProcess(this, obj_file); 5542715Sstever@eecs.umich.edu break; 5552715Sstever@eecs.umich.edu 5562715Sstever@eecs.umich.edu default: 5572715Sstever@eecs.umich.edu fatal("Unknown/unsupported operating system."); 5582715Sstever@eecs.umich.edu } 5595335Shines@cs.fsu.edu#elif THE_ISA == ARM_ISA 56011851Sbrandon.potter@amd.com ObjectFile::Arch arch = obj_file->getArch(); 56110037SARM gem5 Developers if (arch != ObjectFile::Arm && arch != ObjectFile::Thumb && 56210037SARM gem5 Developers arch != ObjectFile::Arm64) 5635335Shines@cs.fsu.edu fatal("Object file architecture does not match compiled ISA (ARM)."); 56411851Sbrandon.potter@amd.com switch (obj_file->getOpSys()) { 5655753Ssteve.reinhardt@amd.com case ObjectFile::UnknownOpSys: 5665753Ssteve.reinhardt@amd.com warn("Unknown operating system; assuming Linux."); 5675753Ssteve.reinhardt@amd.com // fall through 5685335Shines@cs.fsu.edu case ObjectFile::Linux: 56910037SARM gem5 Developers if (arch == ObjectFile::Arm64) { 57011851Sbrandon.potter@amd.com process = new ArmLinuxProcess64(this, obj_file, 57111851Sbrandon.potter@amd.com obj_file->getArch()); 57210037SARM gem5 Developers } else { 57311851Sbrandon.potter@amd.com process = new ArmLinuxProcess32(this, obj_file, 57411851Sbrandon.potter@amd.com obj_file->getArch()); 57510037SARM gem5 Developers } 5765335Shines@cs.fsu.edu break; 57710810Sbr@bsdpad.com case ObjectFile::FreeBSD: 57810810Sbr@bsdpad.com if (arch == ObjectFile::Arm64) { 57911851Sbrandon.potter@amd.com process = new ArmFreebsdProcess64(this, obj_file, 58011851Sbrandon.potter@amd.com obj_file->getArch()); 58110810Sbr@bsdpad.com } else { 58211851Sbrandon.potter@amd.com process = new ArmFreebsdProcess32(this, obj_file, 58311851Sbrandon.potter@amd.com obj_file->getArch()); 58410810Sbr@bsdpad.com } 58510810Sbr@bsdpad.com break; 5866392Ssaidi@eecs.umich.edu case ObjectFile::LinuxArmOABI: 5876392Ssaidi@eecs.umich.edu fatal("M5 does not support ARM OABI binaries. Please recompile with an" 5886392Ssaidi@eecs.umich.edu " EABI compiler."); 5895335Shines@cs.fsu.edu default: 5905335Shines@cs.fsu.edu fatal("Unknown/unsupported operating system."); 5915335Shines@cs.fsu.edu } 5926691Stjones1@inf.ed.ac.uk#elif THE_ISA == POWER_ISA 59311851Sbrandon.potter@amd.com if (obj_file->getArch() != ObjectFile::Power) 5946691Stjones1@inf.ed.ac.uk fatal("Object file architecture does not match compiled ISA (Power)."); 59511851Sbrandon.potter@amd.com switch (obj_file->getOpSys()) { 5966691Stjones1@inf.ed.ac.uk case ObjectFile::UnknownOpSys: 5976691Stjones1@inf.ed.ac.uk warn("Unknown operating system; assuming Linux."); 5986691Stjones1@inf.ed.ac.uk // fall through 5996691Stjones1@inf.ed.ac.uk case ObjectFile::Linux: 60011851Sbrandon.potter@amd.com process = new PowerLinuxProcess(this, obj_file); 6016691Stjones1@inf.ed.ac.uk break; 6026691Stjones1@inf.ed.ac.uk 6036691Stjones1@inf.ed.ac.uk default: 6046691Stjones1@inf.ed.ac.uk fatal("Unknown/unsupported operating system."); 6056691Stjones1@inf.ed.ac.uk } 60611723Sar4jc@virginia.edu#elif THE_ISA == RISCV_ISA 60711851Sbrandon.potter@amd.com if (obj_file->getArch() != ObjectFile::Riscv) 60811723Sar4jc@virginia.edu fatal("Object file architecture does not match compiled ISA (RISCV)."); 60911851Sbrandon.potter@amd.com switch (obj_file->getOpSys()) { 61011723Sar4jc@virginia.edu case ObjectFile::UnknownOpSys: 61111723Sar4jc@virginia.edu warn("Unknown operating system; assuming Linux."); 61211723Sar4jc@virginia.edu // fall through 61311723Sar4jc@virginia.edu case ObjectFile::Linux: 61411851Sbrandon.potter@amd.com process = new RiscvLinuxProcess(this, obj_file); 61511723Sar4jc@virginia.edu break; 61611723Sar4jc@virginia.edu default: 61711723Sar4jc@virginia.edu fatal("Unknown/unsupported operating system."); 61811723Sar4jc@virginia.edu } 6192715Sstever@eecs.umich.edu#else 6202715Sstever@eecs.umich.edu#error "THE_ISA not set" 6212715Sstever@eecs.umich.edu#endif 6222715Sstever@eecs.umich.edu 6232715Sstever@eecs.umich.edu if (process == NULL) 6242715Sstever@eecs.umich.edu fatal("Unknown error creating process object."); 6252715Sstever@eecs.umich.edu return process; 6262715Sstever@eecs.umich.edu} 62711854Sbrandon.potter@amd.com 62811854Sbrandon.potter@amd.comstd::string 62911854Sbrandon.potter@amd.comProcess::fullPath(const std::string &file_name) 63011854Sbrandon.potter@amd.com{ 63111854Sbrandon.potter@amd.com if (file_name[0] == '/' || cwd.empty()) 63211854Sbrandon.potter@amd.com return file_name; 63311854Sbrandon.potter@amd.com 63411854Sbrandon.potter@amd.com std::string full = cwd; 63511854Sbrandon.potter@amd.com 63611854Sbrandon.potter@amd.com if (cwd[cwd.size() - 1] != '/') 63711854Sbrandon.potter@amd.com full += '/'; 63811854Sbrandon.potter@amd.com 63911854Sbrandon.potter@amd.com return full + file_name; 64011854Sbrandon.potter@amd.com} 641