process.cc revision 11905
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 3611723Sar4jc@virginia.edu#include <vector> 3711723Sar4jc@virginia.edu 3811723Sar4jc@virginia.edu#include "arch/riscv/isa_traits.hh" 3911723Sar4jc@virginia.edu#include "base/loader/elf_object.hh" 4011723Sar4jc@virginia.edu#include "base/loader/object_file.hh" 4111723Sar4jc@virginia.edu#include "base/misc.hh" 4211723Sar4jc@virginia.edu#include "cpu/thread_context.hh" 4311723Sar4jc@virginia.edu#include "debug/Loader.hh" 4411723Sar4jc@virginia.edu#include "mem/page_table.hh" 4511854Sbrandon.potter@amd.com#include "sim/aux_vector.hh" 4611723Sar4jc@virginia.edu#include "sim/process.hh" 4711723Sar4jc@virginia.edu#include "sim/process_impl.hh" 4811800Sbrandon.potter@amd.com#include "sim/syscall_return.hh" 4911723Sar4jc@virginia.edu#include "sim/system.hh" 5011723Sar4jc@virginia.edu 5111723Sar4jc@virginia.eduusing namespace std; 5211723Sar4jc@virginia.eduusing namespace RiscvISA; 5311723Sar4jc@virginia.edu 5411851Sbrandon.potter@amd.comRiscvProcess::RiscvProcess(ProcessParams * params, 5511851Sbrandon.potter@amd.com ObjectFile *objFile) : Process(params, objFile) 5611723Sar4jc@virginia.edu{ 5711723Sar4jc@virginia.edu // Set up stack. On RISC-V, stack starts at the top of kuseg 5811723Sar4jc@virginia.edu // user address space. RISC-V stack grows down from here 5911905SBrandon.Potter@amd.com Addr stack_base = 0x7FFFFFFF; 6011905SBrandon.Potter@amd.com 6111905SBrandon.Potter@amd.com Addr max_stack_size = 8 * 1024 * 1024; 6211723Sar4jc@virginia.edu 6311723Sar4jc@virginia.edu // Set pointer for next thread stack. Reserve 8M for main stack. 6411905SBrandon.Potter@amd.com Addr next_thread_stack_base = stack_base - max_stack_size; 6511723Sar4jc@virginia.edu 6611723Sar4jc@virginia.edu // Set up break point (Top of Heap) 6711905SBrandon.Potter@amd.com Addr brk_point = objFile->bssBase() + objFile->bssSize(); 6811723Sar4jc@virginia.edu 6911723Sar4jc@virginia.edu // Set up region for mmaps. Start it 1GB above the top of the heap. 7011905SBrandon.Potter@amd.com Addr mmap_end = brk_point + 0x40000000L; 7111905SBrandon.Potter@amd.com 7211905SBrandon.Potter@amd.com memState = make_shared<MemState>(brk_point, stack_base, max_stack_size, 7311905SBrandon.Potter@amd.com next_thread_stack_base, mmap_end); 7411723Sar4jc@virginia.edu} 7511723Sar4jc@virginia.edu 7611723Sar4jc@virginia.eduvoid 7711851Sbrandon.potter@amd.comRiscvProcess::initState() 7811723Sar4jc@virginia.edu{ 7911851Sbrandon.potter@amd.com Process::initState(); 8011723Sar4jc@virginia.edu 8111723Sar4jc@virginia.edu argsInit<uint64_t>(PageBytes); 8211723Sar4jc@virginia.edu} 8311723Sar4jc@virginia.edu 8411723Sar4jc@virginia.edutemplate<class IntType> void 8511851Sbrandon.potter@amd.comRiscvProcess::argsInit(int pageSize) 8611723Sar4jc@virginia.edu{ 8711723Sar4jc@virginia.edu updateBias(); 8811723Sar4jc@virginia.edu 8911723Sar4jc@virginia.edu // load object file into target memory 9011723Sar4jc@virginia.edu objFile->loadSections(initVirtMem); 9111723Sar4jc@virginia.edu 9211723Sar4jc@virginia.edu typedef AuxVector<IntType> auxv_t; 9311723Sar4jc@virginia.edu vector<auxv_t> auxv; 9411723Sar4jc@virginia.edu ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile); 9511723Sar4jc@virginia.edu if (elfObject) { 9611723Sar4jc@virginia.edu // Set the system page size 9711723Sar4jc@virginia.edu auxv.push_back(auxv_t(M5_AT_PAGESZ, RiscvISA::PageBytes)); 9811723Sar4jc@virginia.edu // Set the frequency at which time() increments 9911723Sar4jc@virginia.edu auxv.push_back(auxv_t(M5_AT_CLKTCK, 100)); 10011723Sar4jc@virginia.edu // For statically linked executables, this is the virtual 10111723Sar4jc@virginia.edu // address of the program header tables if they appear in the 10211723Sar4jc@virginia.edu // executable image. 10311723Sar4jc@virginia.edu auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable())); 10411723Sar4jc@virginia.edu DPRINTF(Loader, "auxv at PHDR %08p\n", 10511723Sar4jc@virginia.edu elfObject->programHeaderTable()); 10611723Sar4jc@virginia.edu // This is the size of a program header entry from the elf file. 10711723Sar4jc@virginia.edu auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize())); 10811723Sar4jc@virginia.edu // This is the number of program headers from the original elf file. 10911723Sar4jc@virginia.edu auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount())); 11011723Sar4jc@virginia.edu auxv.push_back(auxv_t(M5_AT_BASE, getBias())); 11111723Sar4jc@virginia.edu //The entry point to the program 11211723Sar4jc@virginia.edu auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint())); 11311723Sar4jc@virginia.edu //Different user and group IDs 11411723Sar4jc@virginia.edu auxv.push_back(auxv_t(M5_AT_UID, uid())); 11511723Sar4jc@virginia.edu auxv.push_back(auxv_t(M5_AT_EUID, euid())); 11611723Sar4jc@virginia.edu auxv.push_back(auxv_t(M5_AT_GID, gid())); 11711723Sar4jc@virginia.edu auxv.push_back(auxv_t(M5_AT_EGID, egid())); 11811723Sar4jc@virginia.edu } 11911723Sar4jc@virginia.edu 12011723Sar4jc@virginia.edu const IntType zero = 0; 12111723Sar4jc@virginia.edu IntType argc = htog((IntType)argv.size()); 12211723Sar4jc@virginia.edu int argv_array_size = sizeof(Addr) * argv.size(); 12311723Sar4jc@virginia.edu int arg_data_size = 0; 12411723Sar4jc@virginia.edu for (string arg: argv) 12511723Sar4jc@virginia.edu arg_data_size += arg.size() + 1; 12611723Sar4jc@virginia.edu int envp_array_size = sizeof(Addr) * envp.size(); 12711723Sar4jc@virginia.edu int env_data_size = 0; 12811723Sar4jc@virginia.edu for (string env: envp) 12911723Sar4jc@virginia.edu env_data_size += env.size() + 1; 13011723Sar4jc@virginia.edu int auxv_array_size = 2 * sizeof(IntType)*auxv.size(); 13111723Sar4jc@virginia.edu 13211905SBrandon.Potter@amd.com Addr stack_size = sizeof(IntType) + argv_array_size + 2 * sizeof(Addr) + 13311886Sbrandon.potter@amd.com sizeof(Addr) + arg_data_size + 2 * sizeof(Addr); 13411723Sar4jc@virginia.edu if (!envp.empty()) { 13511905SBrandon.Potter@amd.com stack_size += 2 * sizeof(Addr) + envp_array_size + 2 * 13611886Sbrandon.potter@amd.com sizeof(Addr) + env_data_size; 13711723Sar4jc@virginia.edu } 13811723Sar4jc@virginia.edu if (!auxv.empty()) 13911905SBrandon.Potter@amd.com stack_size += 2 * sizeof(Addr) + auxv_array_size; 14011723Sar4jc@virginia.edu 14111905SBrandon.Potter@amd.com memState->setStackSize(stack_size); 14211905SBrandon.Potter@amd.com 14311905SBrandon.Potter@amd.com Addr stack_min = roundDown(memState->getStackBase() - 14411905SBrandon.Potter@amd.com stack_size, pageSize); 14511905SBrandon.Potter@amd.com allocateMem(stack_min, roundUp(memState->getStackSize(), pageSize)); 14611905SBrandon.Potter@amd.com 14711905SBrandon.Potter@amd.com memState->setStackMin(stack_min); 14811905SBrandon.Potter@amd.com 14911905SBrandon.Potter@amd.com Addr argv_array_base = memState->getStackMin() + sizeof(IntType); 15011723Sar4jc@virginia.edu Addr arg_data_base = argv_array_base + argv_array_size + 2 * sizeof(Addr); 15111723Sar4jc@virginia.edu Addr envp_array_base = arg_data_base + arg_data_size; 15211723Sar4jc@virginia.edu if (!envp.empty()) 15311723Sar4jc@virginia.edu envp_array_base += 2 * sizeof(Addr); 15411723Sar4jc@virginia.edu Addr env_data_base = envp_array_base + envp_array_size; 15511723Sar4jc@virginia.edu if (!envp.empty()) 15611723Sar4jc@virginia.edu env_data_base += 2 * sizeof(Addr); 15711723Sar4jc@virginia.edu 15811723Sar4jc@virginia.edu vector<Addr> arg_pointers; 15911723Sar4jc@virginia.edu if (!argv.empty()) { 16011723Sar4jc@virginia.edu arg_pointers.push_back(arg_data_base); 16111723Sar4jc@virginia.edu for (int i = 0; i < argv.size() - 1; i++) { 16211723Sar4jc@virginia.edu arg_pointers.push_back(arg_pointers[i] + argv[i].size() + 1); 16311723Sar4jc@virginia.edu } 16411723Sar4jc@virginia.edu } 16511723Sar4jc@virginia.edu 16611723Sar4jc@virginia.edu vector<Addr> env_pointers; 16711723Sar4jc@virginia.edu if (!envp.empty()) { 16811723Sar4jc@virginia.edu env_pointers.push_back(env_data_base); 16911723Sar4jc@virginia.edu for (int i = 0; i < envp.size() - 1; i++) { 17011723Sar4jc@virginia.edu env_pointers.push_back(env_pointers[i] + envp[i].size() + 1); 17111723Sar4jc@virginia.edu } 17211723Sar4jc@virginia.edu } 17311723Sar4jc@virginia.edu 17411905SBrandon.Potter@amd.com Addr sp = memState->getStackMin(); 17511723Sar4jc@virginia.edu initVirtMem.writeBlob(sp, (uint8_t *)&argc, sizeof(IntType)); 17611723Sar4jc@virginia.edu sp += sizeof(IntType); 17711723Sar4jc@virginia.edu for (Addr arg_pointer: arg_pointers) { 17811723Sar4jc@virginia.edu initVirtMem.writeBlob(sp, (uint8_t *)&arg_pointer, sizeof(Addr)); 17911723Sar4jc@virginia.edu sp += sizeof(Addr); 18011723Sar4jc@virginia.edu } 18111723Sar4jc@virginia.edu for (int i = 0; i < 2; i++) { 18211723Sar4jc@virginia.edu initVirtMem.writeBlob(sp, (uint8_t *)&zero, sizeof(Addr)); 18311723Sar4jc@virginia.edu sp += sizeof(Addr); 18411723Sar4jc@virginia.edu } 18511723Sar4jc@virginia.edu for (int i = 0; i < argv.size(); i++) { 18611723Sar4jc@virginia.edu initVirtMem.writeString(sp, argv[i].c_str()); 18711723Sar4jc@virginia.edu sp += argv[i].size() + 1; 18811723Sar4jc@virginia.edu } 18911723Sar4jc@virginia.edu if (!envp.empty()) { 19011723Sar4jc@virginia.edu for (int i = 0; i < 2; i++) { 19111723Sar4jc@virginia.edu initVirtMem.writeBlob(sp, (uint8_t *)&zero, sizeof(Addr)); 19211723Sar4jc@virginia.edu sp += sizeof(Addr); 19311723Sar4jc@virginia.edu } 19411723Sar4jc@virginia.edu } 19511723Sar4jc@virginia.edu for (Addr env_pointer: env_pointers) 19611723Sar4jc@virginia.edu initVirtMem.writeBlob(sp, (uint8_t *)&env_pointer, sizeof(Addr)); 19711723Sar4jc@virginia.edu if (!envp.empty()) { 19811723Sar4jc@virginia.edu for (int i = 0; i < 2; i++) { 19911723Sar4jc@virginia.edu initVirtMem.writeBlob(sp, (uint8_t *)&zero, sizeof(Addr)); 20011723Sar4jc@virginia.edu sp += sizeof(Addr); 20111723Sar4jc@virginia.edu } 20211723Sar4jc@virginia.edu } 20311723Sar4jc@virginia.edu for (int i = 0; i < envp.size(); i++) { 20411723Sar4jc@virginia.edu initVirtMem.writeString(sp, envp[i].c_str()); 20511723Sar4jc@virginia.edu sp += envp[i].size() + 1; 20611723Sar4jc@virginia.edu } 20711723Sar4jc@virginia.edu if (!auxv.empty()) { 20811723Sar4jc@virginia.edu for (int i = 0; i < 2; i++) { 20911723Sar4jc@virginia.edu initVirtMem.writeBlob(sp, (uint8_t *)&zero, sizeof(Addr)); 21011723Sar4jc@virginia.edu sp += sizeof(Addr); 21111723Sar4jc@virginia.edu } 21211723Sar4jc@virginia.edu } 21311723Sar4jc@virginia.edu for (auxv_t aux: auxv) { 21411723Sar4jc@virginia.edu initVirtMem.writeBlob(sp, (uint8_t *)&aux.a_type, sizeof(IntType)); 21511723Sar4jc@virginia.edu initVirtMem.writeBlob(sp + sizeof(IntType), (uint8_t *)&aux.a_val, 21611723Sar4jc@virginia.edu sizeof(IntType)); 21711723Sar4jc@virginia.edu sp += 2 * sizeof(IntType); 21811723Sar4jc@virginia.edu } 21911723Sar4jc@virginia.edu for (int i = 0; i < 2; i++) { 22011723Sar4jc@virginia.edu initVirtMem.writeBlob(sp, (uint8_t *)&zero, sizeof(Addr)); 22111723Sar4jc@virginia.edu sp += sizeof(Addr); 22211723Sar4jc@virginia.edu } 22311723Sar4jc@virginia.edu 22411723Sar4jc@virginia.edu ThreadContext *tc = system->getThreadContext(contextIds[0]); 22511905SBrandon.Potter@amd.com tc->setIntReg(StackPointerReg, memState->getStackMin()); 22611723Sar4jc@virginia.edu tc->pcState(getStartPC()); 22711723Sar4jc@virginia.edu} 22811723Sar4jc@virginia.edu 22911723Sar4jc@virginia.eduRiscvISA::IntReg 23011851Sbrandon.potter@amd.comRiscvProcess::getSyscallArg(ThreadContext *tc, int &i) 23111723Sar4jc@virginia.edu{ 23211806Sar4jc@virginia.edu // RISC-V only has four system call argument registers by convention, so 23311806Sar4jc@virginia.edu // if a larger index is requested return 0 23411806Sar4jc@virginia.edu RiscvISA::IntReg retval = 0; 23511806Sar4jc@virginia.edu if (i < 4) 23611806Sar4jc@virginia.edu retval = tc->readIntReg(SyscallArgumentRegs[i]); 23711806Sar4jc@virginia.edu i++; 23811806Sar4jc@virginia.edu return retval; 23911723Sar4jc@virginia.edu} 24011723Sar4jc@virginia.edu 24111723Sar4jc@virginia.eduvoid 24211851Sbrandon.potter@amd.comRiscvProcess::setSyscallArg(ThreadContext *tc, int i, RiscvISA::IntReg val) 24311723Sar4jc@virginia.edu{ 24411723Sar4jc@virginia.edu tc->setIntReg(SyscallArgumentRegs[i], val); 24511723Sar4jc@virginia.edu} 24611723Sar4jc@virginia.edu 24711723Sar4jc@virginia.eduvoid 24811851Sbrandon.potter@amd.comRiscvProcess::setSyscallReturn(ThreadContext *tc, SyscallReturn sysret) 24911723Sar4jc@virginia.edu{ 25011723Sar4jc@virginia.edu if (sysret.successful()) { 25111723Sar4jc@virginia.edu // no error 25211723Sar4jc@virginia.edu tc->setIntReg(SyscallPseudoReturnReg, sysret.returnValue()); 25311723Sar4jc@virginia.edu } else { 25411723Sar4jc@virginia.edu // got an error, return details 25511723Sar4jc@virginia.edu tc->setIntReg(SyscallPseudoReturnReg, sysret.errnoValue()); 25611723Sar4jc@virginia.edu } 25711723Sar4jc@virginia.edu} 258