process.cc revision 11970
111723Sar4jc@virginia.edu/* 211723Sar4jc@virginia.edu * Copyright (c) 2004-2005 The Regents of The University of Michigan 311723Sar4jc@virginia.edu * Copyright (c) 2016 The University of Virginia 411723Sar4jc@virginia.edu * All rights reserved. 511723Sar4jc@virginia.edu * 611723Sar4jc@virginia.edu * Redistribution and use in source and binary forms, with or without 711723Sar4jc@virginia.edu * modification, are permitted provided that the following conditions are 811723Sar4jc@virginia.edu * met: redistributions of source code must retain the above copyright 911723Sar4jc@virginia.edu * notice, this list of conditions and the following disclaimer; 1011723Sar4jc@virginia.edu * redistributions in binary form must reproduce the above copyright 1111723Sar4jc@virginia.edu * notice, this list of conditions and the following disclaimer in the 1211723Sar4jc@virginia.edu * documentation and/or other materials provided with the distribution; 1311723Sar4jc@virginia.edu * neither the name of the copyright holders nor the names of its 1411723Sar4jc@virginia.edu * contributors may be used to endorse or promote products derived from 1511723Sar4jc@virginia.edu * this software without specific prior written permission. 1611723Sar4jc@virginia.edu * 1711723Sar4jc@virginia.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 1811723Sar4jc@virginia.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 1911723Sar4jc@virginia.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 2011723Sar4jc@virginia.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 2111723Sar4jc@virginia.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 2211723Sar4jc@virginia.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 2311723Sar4jc@virginia.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2411723Sar4jc@virginia.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2511723Sar4jc@virginia.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2611723Sar4jc@virginia.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 2711723Sar4jc@virginia.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2811723Sar4jc@virginia.edu * 2911723Sar4jc@virginia.edu * Authors: Gabe Black 3011723Sar4jc@virginia.edu * Ali Saidi 3111723Sar4jc@virginia.edu * Korey Sewell 3211723Sar4jc@virginia.edu * Alec Roelke 3311723Sar4jc@virginia.edu */ 3411723Sar4jc@virginia.edu#include "arch/riscv/process.hh" 3511723Sar4jc@virginia.edu 3611964Sar4jc@virginia.edu#include <algorithm> 3711964Sar4jc@virginia.edu#include <cstddef> 3811964Sar4jc@virginia.edu#include <iostream> 3911964Sar4jc@virginia.edu#include <map> 4011964Sar4jc@virginia.edu#include <string> 4111723Sar4jc@virginia.edu#include <vector> 4211723Sar4jc@virginia.edu 4311723Sar4jc@virginia.edu#include "arch/riscv/isa_traits.hh" 4411723Sar4jc@virginia.edu#include "base/loader/elf_object.hh" 4511723Sar4jc@virginia.edu#include "base/loader/object_file.hh" 4611723Sar4jc@virginia.edu#include "base/misc.hh" 4711723Sar4jc@virginia.edu#include "cpu/thread_context.hh" 4811964Sar4jc@virginia.edu#include "debug/Stack.hh" 4911723Sar4jc@virginia.edu#include "mem/page_table.hh" 5011964Sar4jc@virginia.edu#include "params/Process.hh" 5111854Sbrandon.potter@amd.com#include "sim/aux_vector.hh" 5211723Sar4jc@virginia.edu#include "sim/process.hh" 5311723Sar4jc@virginia.edu#include "sim/process_impl.hh" 5411800Sbrandon.potter@amd.com#include "sim/syscall_return.hh" 5511723Sar4jc@virginia.edu#include "sim/system.hh" 5611723Sar4jc@virginia.edu 5711723Sar4jc@virginia.eduusing namespace std; 5811723Sar4jc@virginia.eduusing namespace RiscvISA; 5911723Sar4jc@virginia.edu 6011851Sbrandon.potter@amd.comRiscvProcess::RiscvProcess(ProcessParams * params, 6111851Sbrandon.potter@amd.com ObjectFile *objFile) : Process(params, objFile) 6211723Sar4jc@virginia.edu{ 6311970Sar4jc@virginia.edu const Addr stack_base = 0x7FFFFFFFFFFFFFFFL; 6411964Sar4jc@virginia.edu const Addr max_stack_size = PageBytes * 64; 6511964Sar4jc@virginia.edu const Addr next_thread_stack_base = stack_base - max_stack_size; 6611964Sar4jc@virginia.edu const Addr brk_point = roundUp(objFile->bssBase() + objFile->bssSize(), 6711964Sar4jc@virginia.edu PageBytes); 6811970Sar4jc@virginia.edu const Addr mmap_end = 0x4000000000000000L; 6911905SBrandon.Potter@amd.com memState = make_shared<MemState>(brk_point, stack_base, max_stack_size, 7011964Sar4jc@virginia.edu next_thread_stack_base, mmap_end); 7111723Sar4jc@virginia.edu} 7211723Sar4jc@virginia.edu 7311723Sar4jc@virginia.eduvoid 7411851Sbrandon.potter@amd.comRiscvProcess::initState() 7511723Sar4jc@virginia.edu{ 7611851Sbrandon.potter@amd.com Process::initState(); 7711723Sar4jc@virginia.edu 7811723Sar4jc@virginia.edu argsInit<uint64_t>(PageBytes); 7911723Sar4jc@virginia.edu} 8011723Sar4jc@virginia.edu 8111723Sar4jc@virginia.edutemplate<class IntType> void 8211851Sbrandon.potter@amd.comRiscvProcess::argsInit(int pageSize) 8311723Sar4jc@virginia.edu{ 8411723Sar4jc@virginia.edu updateBias(); 8511964Sar4jc@virginia.edu objFile->loadSections(initVirtMem); 8611964Sar4jc@virginia.edu ElfObject* elfObject = dynamic_cast<ElfObject*>(objFile); 8711964Sar4jc@virginia.edu memState->setStackMin(memState->getStackBase()); 8811723Sar4jc@virginia.edu 8911964Sar4jc@virginia.edu // Determine stack size and populate auxv 9011964Sar4jc@virginia.edu Addr stack_top = memState->getStackMin(); 9111964Sar4jc@virginia.edu for (const string& arg: argv) 9211964Sar4jc@virginia.edu stack_top -= arg.size() + 1; 9311964Sar4jc@virginia.edu for (const string& env: envp) 9411964Sar4jc@virginia.edu stack_top -= env.size() + 1; 9511964Sar4jc@virginia.edu stack_top &= -sizeof(Addr); 9611723Sar4jc@virginia.edu 9711964Sar4jc@virginia.edu vector<AuxVector<IntType>> auxv; 9811964Sar4jc@virginia.edu if (elfObject != nullptr) { 9911964Sar4jc@virginia.edu auxv.push_back({M5_AT_ENTRY, objFile->entryPoint()}); 10011964Sar4jc@virginia.edu auxv.push_back({M5_AT_PHNUM, elfObject->programHeaderCount()}); 10111964Sar4jc@virginia.edu auxv.push_back({M5_AT_PHENT, elfObject->programHeaderSize()}); 10211964Sar4jc@virginia.edu auxv.push_back({M5_AT_PHDR, elfObject->programHeaderTable()}); 10311964Sar4jc@virginia.edu auxv.push_back({M5_AT_PAGESZ, PageBytes}); 10411964Sar4jc@virginia.edu auxv.push_back({M5_AT_SECURE, 0}); 10511964Sar4jc@virginia.edu auxv.push_back({M5_AT_RANDOM, stack_top}); 10611964Sar4jc@virginia.edu auxv.push_back({M5_AT_NULL, 0}); 10711964Sar4jc@virginia.edu } 10811964Sar4jc@virginia.edu stack_top -= (1 + argv.size()) * sizeof(Addr) + 10911964Sar4jc@virginia.edu (1 + envp.size()) * sizeof(Addr) + 11011964Sar4jc@virginia.edu sizeof(Addr) + 2 * sizeof(IntType) * auxv.size(); 11111964Sar4jc@virginia.edu stack_top &= -2*sizeof(Addr); 11211964Sar4jc@virginia.edu memState->setStackSize(memState->getStackBase() - stack_top); 11311964Sar4jc@virginia.edu allocateMem(roundDown(stack_top, pageSize), 11411964Sar4jc@virginia.edu roundUp(memState->getStackSize(), pageSize)); 11511964Sar4jc@virginia.edu 11611964Sar4jc@virginia.edu // Copy argv to stack 11711964Sar4jc@virginia.edu vector<Addr> argPointers; 11811964Sar4jc@virginia.edu for (const string& arg: argv) { 11911964Sar4jc@virginia.edu memState->setStackMin(memState->getStackMin() - (arg.size() + 1)); 12011964Sar4jc@virginia.edu initVirtMem.writeString(memState->getStackMin(), arg.c_str()); 12111964Sar4jc@virginia.edu argPointers.push_back(memState->getStackMin()); 12211964Sar4jc@virginia.edu if (DTRACE(Stack)) { 12311964Sar4jc@virginia.edu string wrote; 12411964Sar4jc@virginia.edu initVirtMem.readString(wrote, argPointers.back()); 12511964Sar4jc@virginia.edu DPRINTFN("Wrote arg \"%s\" to address %p\n", 12611964Sar4jc@virginia.edu wrote, (void*)memState->getStackMin()); 12711964Sar4jc@virginia.edu } 12811964Sar4jc@virginia.edu } 12911964Sar4jc@virginia.edu argPointers.push_back(0); 13011964Sar4jc@virginia.edu 13111964Sar4jc@virginia.edu // Copy envp to stack 13211964Sar4jc@virginia.edu vector<Addr> envPointers; 13311964Sar4jc@virginia.edu for (const string& env: envp) { 13411964Sar4jc@virginia.edu memState->setStackMin(memState->getStackMin() - (env.size() + 1)); 13511964Sar4jc@virginia.edu initVirtMem.writeString(memState->getStackMin(), env.c_str()); 13611964Sar4jc@virginia.edu envPointers.push_back(memState->getStackMin()); 13711964Sar4jc@virginia.edu DPRINTF(Stack, "Wrote env \"%s\" to address %p\n", 13811964Sar4jc@virginia.edu env, (void*)memState->getStackMin()); 13911964Sar4jc@virginia.edu } 14011964Sar4jc@virginia.edu envPointers.push_back(0); 14111964Sar4jc@virginia.edu 14211964Sar4jc@virginia.edu // Align stack 14311964Sar4jc@virginia.edu memState->setStackMin(memState->getStackMin() & -sizeof(Addr)); 14411964Sar4jc@virginia.edu 14511964Sar4jc@virginia.edu // Calculate bottom of stack 14611964Sar4jc@virginia.edu memState->setStackMin(memState->getStackMin() - 14711964Sar4jc@virginia.edu ((1 + argv.size()) * sizeof(Addr) + 14811964Sar4jc@virginia.edu (1 + envp.size()) * sizeof(Addr) + 14911964Sar4jc@virginia.edu sizeof(Addr) + 2 * sizeof(IntType) * auxv.size())); 15011964Sar4jc@virginia.edu memState->setStackMin(memState->getStackMin() & -2*sizeof(Addr)); 15111964Sar4jc@virginia.edu Addr sp = memState->getStackMin(); 15211964Sar4jc@virginia.edu const auto pushOntoStack = 15311964Sar4jc@virginia.edu [this, &sp](const uint8_t* data, const size_t size) { 15411964Sar4jc@virginia.edu initVirtMem.writeBlob(sp, data, size); 15511964Sar4jc@virginia.edu sp += size; 15611964Sar4jc@virginia.edu }; 15711964Sar4jc@virginia.edu 15811964Sar4jc@virginia.edu // Push argc and argv pointers onto stack 15911964Sar4jc@virginia.edu IntType argc = htog((IntType)argv.size()); 16011964Sar4jc@virginia.edu DPRINTF(Stack, "Wrote argc %d to address %p\n", 16111964Sar4jc@virginia.edu argv.size(), (void*)sp); 16211964Sar4jc@virginia.edu pushOntoStack((uint8_t*)&argc, sizeof(IntType)); 16311964Sar4jc@virginia.edu for (const Addr& argPointer: argPointers) { 16411964Sar4jc@virginia.edu DPRINTF(Stack, "Wrote argv pointer %p to address %p\n", 16511964Sar4jc@virginia.edu (void*)argPointer, (void*)sp); 16611964Sar4jc@virginia.edu pushOntoStack((uint8_t*)&argPointer, sizeof(Addr)); 16711723Sar4jc@virginia.edu } 16811723Sar4jc@virginia.edu 16911964Sar4jc@virginia.edu // Push env pointers onto stack 17011964Sar4jc@virginia.edu for (const Addr& envPointer: envPointers) { 17111964Sar4jc@virginia.edu DPRINTF(Stack, "Wrote envp pointer %p to address %p\n", 17211964Sar4jc@virginia.edu (void*)envPointer, (void*)sp); 17311964Sar4jc@virginia.edu pushOntoStack((uint8_t*)&envPointer, sizeof(Addr)); 17411723Sar4jc@virginia.edu } 17511723Sar4jc@virginia.edu 17611964Sar4jc@virginia.edu // Push aux vector onto stack 17711964Sar4jc@virginia.edu std::map<IntType, string> aux_keys = { 17811964Sar4jc@virginia.edu {M5_AT_ENTRY, "M5_AT_ENTRY"}, 17911964Sar4jc@virginia.edu {M5_AT_PHNUM, "M5_AT_PHNUM"}, 18011964Sar4jc@virginia.edu {M5_AT_PHENT, "M5_AT_PHENT"}, 18111964Sar4jc@virginia.edu {M5_AT_PHDR, "M5_AT_PHDR"}, 18211964Sar4jc@virginia.edu {M5_AT_PAGESZ, "M5_AT_PAGESZ"}, 18311964Sar4jc@virginia.edu {M5_AT_SECURE, "M5_AT_SECURE"}, 18411964Sar4jc@virginia.edu {M5_AT_RANDOM, "M5_AT_RANDOM"}, 18511964Sar4jc@virginia.edu {M5_AT_NULL, "M5_AT_NULL"} 18611964Sar4jc@virginia.edu }; 18711964Sar4jc@virginia.edu for (const AuxVector<IntType>& aux: auxv) { 18811964Sar4jc@virginia.edu DPRINTF(Stack, "Wrote aux key %s to address %p\n", 18911964Sar4jc@virginia.edu aux_keys[aux.a_type], (void*)sp); 19011964Sar4jc@virginia.edu pushOntoStack((uint8_t*)&aux.a_type, sizeof(IntType)); 19111964Sar4jc@virginia.edu DPRINTF(Stack, "Wrote aux value %x to address %p\n", 19211964Sar4jc@virginia.edu aux.a_val, (void*)sp); 19311964Sar4jc@virginia.edu pushOntoStack((uint8_t*)&aux.a_val, sizeof(IntType)); 19411723Sar4jc@virginia.edu } 19511723Sar4jc@virginia.edu 19611723Sar4jc@virginia.edu ThreadContext *tc = system->getThreadContext(contextIds[0]); 19711905SBrandon.Potter@amd.com tc->setIntReg(StackPointerReg, memState->getStackMin()); 19811723Sar4jc@virginia.edu tc->pcState(getStartPC()); 19911964Sar4jc@virginia.edu 20011964Sar4jc@virginia.edu memState->setStackMin(roundDown(memState->getStackMin(), pageSize)); 20111723Sar4jc@virginia.edu} 20211723Sar4jc@virginia.edu 20311723Sar4jc@virginia.eduRiscvISA::IntReg 20411851Sbrandon.potter@amd.comRiscvProcess::getSyscallArg(ThreadContext *tc, int &i) 20511723Sar4jc@virginia.edu{ 20611806Sar4jc@virginia.edu // RISC-V only has four system call argument registers by convention, so 20711806Sar4jc@virginia.edu // if a larger index is requested return 0 20811806Sar4jc@virginia.edu RiscvISA::IntReg retval = 0; 20911806Sar4jc@virginia.edu if (i < 4) 21011806Sar4jc@virginia.edu retval = tc->readIntReg(SyscallArgumentRegs[i]); 21111806Sar4jc@virginia.edu i++; 21211806Sar4jc@virginia.edu return retval; 21311723Sar4jc@virginia.edu} 21411723Sar4jc@virginia.edu 21511723Sar4jc@virginia.eduvoid 21611851Sbrandon.potter@amd.comRiscvProcess::setSyscallArg(ThreadContext *tc, int i, RiscvISA::IntReg val) 21711723Sar4jc@virginia.edu{ 21811723Sar4jc@virginia.edu tc->setIntReg(SyscallArgumentRegs[i], val); 21911723Sar4jc@virginia.edu} 22011723Sar4jc@virginia.edu 22111723Sar4jc@virginia.eduvoid 22211851Sbrandon.potter@amd.comRiscvProcess::setSyscallReturn(ThreadContext *tc, SyscallReturn sysret) 22311723Sar4jc@virginia.edu{ 22411723Sar4jc@virginia.edu if (sysret.successful()) { 22511723Sar4jc@virginia.edu // no error 22611723Sar4jc@virginia.edu tc->setIntReg(SyscallPseudoReturnReg, sysret.returnValue()); 22711723Sar4jc@virginia.edu } else { 22811723Sar4jc@virginia.edu // got an error, return details 22911723Sar4jc@virginia.edu tc->setIntReg(SyscallPseudoReturnReg, sysret.errnoValue()); 23011723Sar4jc@virginia.edu } 23111723Sar4jc@virginia.edu} 232