process.cc revision 7532:3f6413fc37a2
113786Sjavier.bueno@metempsy.com/* 213786Sjavier.bueno@metempsy.com * Copyright (c) 2007-2008 The Florida State University 313786Sjavier.bueno@metempsy.com * Copyright (c) 2009 The University of Edinburgh 413786Sjavier.bueno@metempsy.com * All rights reserved. 513786Sjavier.bueno@metempsy.com * 613786Sjavier.bueno@metempsy.com * Redistribution and use in source and binary forms, with or without 713786Sjavier.bueno@metempsy.com * modification, are permitted provided that the following conditions are 813786Sjavier.bueno@metempsy.com * met: redistributions of source code must retain the above copyright 913786Sjavier.bueno@metempsy.com * notice, this list of conditions and the following disclaimer; 1013786Sjavier.bueno@metempsy.com * redistributions in binary form must reproduce the above copyright 1113786Sjavier.bueno@metempsy.com * notice, this list of conditions and the following disclaimer in the 1213786Sjavier.bueno@metempsy.com * documentation and/or other materials provided with the distribution; 1313786Sjavier.bueno@metempsy.com * neither the name of the copyright holders nor the names of its 1413786Sjavier.bueno@metempsy.com * contributors may be used to endorse or promote products derived from 1513786Sjavier.bueno@metempsy.com * this software without specific prior written permission. 1613786Sjavier.bueno@metempsy.com * 1713786Sjavier.bueno@metempsy.com * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 1813786Sjavier.bueno@metempsy.com * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 1913786Sjavier.bueno@metempsy.com * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 2013786Sjavier.bueno@metempsy.com * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 2113786Sjavier.bueno@metempsy.com * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 2213786Sjavier.bueno@metempsy.com * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 2313786Sjavier.bueno@metempsy.com * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2413786Sjavier.bueno@metempsy.com * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2513786Sjavier.bueno@metempsy.com * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2613786Sjavier.bueno@metempsy.com * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 2713786Sjavier.bueno@metempsy.com * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2813786Sjavier.bueno@metempsy.com * 2913786Sjavier.bueno@metempsy.com * Authors: Stephen Hines 3013786Sjavier.bueno@metempsy.com * Timothy M. Jones 3113786Sjavier.bueno@metempsy.com */ 3213786Sjavier.bueno@metempsy.com 3313786Sjavier.bueno@metempsy.com#include "arch/power/isa_traits.hh" 3413786Sjavier.bueno@metempsy.com#include "arch/power/process.hh" 3513786Sjavier.bueno@metempsy.com#include "arch/power/types.hh" 3613786Sjavier.bueno@metempsy.com#include "base/loader/elf_object.hh" 3713786Sjavier.bueno@metempsy.com#include "base/loader/object_file.hh" 3813786Sjavier.bueno@metempsy.com#include "base/misc.hh" 3913786Sjavier.bueno@metempsy.com#include "cpu/thread_context.hh" 4013786Sjavier.bueno@metempsy.com#include "mem/page_table.hh" 4113786Sjavier.bueno@metempsy.com#include "mem/translating_port.hh" 4213786Sjavier.bueno@metempsy.com#include "sim/process_impl.hh" 4313786Sjavier.bueno@metempsy.com#include "sim/system.hh" 4413786Sjavier.bueno@metempsy.com 4513786Sjavier.bueno@metempsy.comusing namespace std; 4613786Sjavier.bueno@metempsy.comusing namespace PowerISA; 4713786Sjavier.bueno@metempsy.com 4813963Sodanrc@yahoo.com.brPowerLiveProcess::PowerLiveProcess(LiveProcessParams *params, 4913786Sjavier.bueno@metempsy.com ObjectFile *objFile) 5013786Sjavier.bueno@metempsy.com : LiveProcess(params, objFile) 5113786Sjavier.bueno@metempsy.com{ 5213786Sjavier.bueno@metempsy.com stack_base = 0xbf000000L; 5313786Sjavier.bueno@metempsy.com 5413786Sjavier.bueno@metempsy.com // Set pointer for next thread stack. Reserve 8M for main stack. 5513786Sjavier.bueno@metempsy.com next_thread_stack_base = stack_base - (8 * 1024 * 1024); 5613786Sjavier.bueno@metempsy.com 5713786Sjavier.bueno@metempsy.com // Set up break point (Top of Heap) 5813786Sjavier.bueno@metempsy.com brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize(); 5913786Sjavier.bueno@metempsy.com brk_point = roundUp(brk_point, VMPageSize); 6013786Sjavier.bueno@metempsy.com 6113786Sjavier.bueno@metempsy.com // Set up region for mmaps. For now, start at bottom of kuseg space. 6213786Sjavier.bueno@metempsy.com mmap_start = mmap_end = 0x70000000L; 6313786Sjavier.bueno@metempsy.com} 6413786Sjavier.bueno@metempsy.com 6513786Sjavier.bueno@metempsy.comvoid 6613786Sjavier.bueno@metempsy.comPowerLiveProcess::initState() 6713786Sjavier.bueno@metempsy.com{ 6813786Sjavier.bueno@metempsy.com Process::initState(); 6913786Sjavier.bueno@metempsy.com 7013786Sjavier.bueno@metempsy.com argsInit(MachineBytes, VMPageSize); 7113786Sjavier.bueno@metempsy.com} 7213786Sjavier.bueno@metempsy.com 7313786Sjavier.bueno@metempsy.comvoid 7413786Sjavier.bueno@metempsy.comPowerLiveProcess::argsInit(int intSize, int pageSize) 7513786Sjavier.bueno@metempsy.com{ 7613786Sjavier.bueno@metempsy.com typedef AuxVector<uint32_t> auxv_t; 7713786Sjavier.bueno@metempsy.com std::vector<auxv_t> auxv; 7813963Sodanrc@yahoo.com.br 7913786Sjavier.bueno@metempsy.com string filename; 8013786Sjavier.bueno@metempsy.com if (argv.size() < 1) 8113786Sjavier.bueno@metempsy.com filename = ""; 8213786Sjavier.bueno@metempsy.com else 8313963Sodanrc@yahoo.com.br filename = argv[0]; 8413786Sjavier.bueno@metempsy.com 8513786Sjavier.bueno@metempsy.com //We want 16 byte alignment 8613786Sjavier.bueno@metempsy.com uint64_t align = 16; 8713786Sjavier.bueno@metempsy.com 8813786Sjavier.bueno@metempsy.com // load object file into target memory 8913786Sjavier.bueno@metempsy.com objFile->loadSections(initVirtMem); 9013786Sjavier.bueno@metempsy.com 9113786Sjavier.bueno@metempsy.com //Setup the auxilliary vectors. These will already have endian conversion. 9213786Sjavier.bueno@metempsy.com //Auxilliary vectors are loaded only for elf formatted executables. 9313786Sjavier.bueno@metempsy.com ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile); 9413786Sjavier.bueno@metempsy.com if (elfObject) { 9513786Sjavier.bueno@metempsy.com uint32_t features = 0; 9613786Sjavier.bueno@metempsy.com 9713786Sjavier.bueno@metempsy.com //Bits which describe the system hardware capabilities 9813786Sjavier.bueno@metempsy.com //XXX Figure out what these should be 9913963Sodanrc@yahoo.com.br auxv.push_back(auxv_t(M5_AT_HWCAP, features)); 10013786Sjavier.bueno@metempsy.com //The system page size 10113786Sjavier.bueno@metempsy.com auxv.push_back(auxv_t(M5_AT_PAGESZ, PowerISA::VMPageSize)); 10213786Sjavier.bueno@metempsy.com //Frequency at which times() increments 10313786Sjavier.bueno@metempsy.com auxv.push_back(auxv_t(M5_AT_CLKTCK, 0x64)); 10413786Sjavier.bueno@metempsy.com // For statically linked executables, this is the virtual address of the 10513786Sjavier.bueno@metempsy.com // program header tables if they appear in the executable image 10613786Sjavier.bueno@metempsy.com auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable())); 10713786Sjavier.bueno@metempsy.com // This is the size of a program header entry from the elf file. 10813786Sjavier.bueno@metempsy.com auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize())); 10913786Sjavier.bueno@metempsy.com // This is the number of program headers from the original elf file. 11013786Sjavier.bueno@metempsy.com auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount())); 11113786Sjavier.bueno@metempsy.com //This is the address of the elf "interpreter", It should be set 11213786Sjavier.bueno@metempsy.com //to 0 for regular executables. It should be something else 11313786Sjavier.bueno@metempsy.com //(not sure what) for dynamic libraries. 11413786Sjavier.bueno@metempsy.com auxv.push_back(auxv_t(M5_AT_BASE, 0)); 11513786Sjavier.bueno@metempsy.com 11613786Sjavier.bueno@metempsy.com //XXX Figure out what this should be. 11713786Sjavier.bueno@metempsy.com auxv.push_back(auxv_t(M5_AT_FLAGS, 0)); 11813786Sjavier.bueno@metempsy.com //The entry point to the program 11913786Sjavier.bueno@metempsy.com auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint())); 12013786Sjavier.bueno@metempsy.com //Different user and group IDs 12113786Sjavier.bueno@metempsy.com auxv.push_back(auxv_t(M5_AT_UID, uid())); 12213786Sjavier.bueno@metempsy.com auxv.push_back(auxv_t(M5_AT_EUID, euid())); 12313786Sjavier.bueno@metempsy.com auxv.push_back(auxv_t(M5_AT_GID, gid())); 12413786Sjavier.bueno@metempsy.com auxv.push_back(auxv_t(M5_AT_EGID, egid())); 12513786Sjavier.bueno@metempsy.com //Whether to enable "secure mode" in the executable 12613786Sjavier.bueno@metempsy.com auxv.push_back(auxv_t(M5_AT_SECURE, 0)); 12713786Sjavier.bueno@metempsy.com //The filename of the program 12813786Sjavier.bueno@metempsy.com auxv.push_back(auxv_t(M5_AT_EXECFN, 0)); 12913963Sodanrc@yahoo.com.br //The string "v51" with unknown meaning 13013786Sjavier.bueno@metempsy.com auxv.push_back(auxv_t(M5_AT_PLATFORM, 0)); 13113786Sjavier.bueno@metempsy.com } 13213786Sjavier.bueno@metempsy.com 13313786Sjavier.bueno@metempsy.com //Figure out how big the initial stack nedes to be 13413963Sodanrc@yahoo.com.br 13513786Sjavier.bueno@metempsy.com // A sentry NULL void pointer at the top of the stack. 13613786Sjavier.bueno@metempsy.com int sentry_size = intSize; 13713786Sjavier.bueno@metempsy.com 13813786Sjavier.bueno@metempsy.com string platform = "v51"; 13913786Sjavier.bueno@metempsy.com int platform_size = platform.size() + 1; 14013786Sjavier.bueno@metempsy.com 14113786Sjavier.bueno@metempsy.com // The aux vectors are put on the stack in two groups. The first group are 14213786Sjavier.bueno@metempsy.com // the vectors that are generated as the elf is loaded. The second group 14313786Sjavier.bueno@metempsy.com // are the ones that were computed ahead of time and include the platform 14413786Sjavier.bueno@metempsy.com // string. 14513786Sjavier.bueno@metempsy.com int aux_data_size = filename.size() + 1; 14613786Sjavier.bueno@metempsy.com 14713786Sjavier.bueno@metempsy.com int env_data_size = 0; 14813786Sjavier.bueno@metempsy.com for (int i = 0; i < envp.size(); ++i) { 14913786Sjavier.bueno@metempsy.com env_data_size += envp[i].size() + 1; 15013786Sjavier.bueno@metempsy.com } 15113786Sjavier.bueno@metempsy.com int arg_data_size = 0; 15213786Sjavier.bueno@metempsy.com for (int i = 0; i < argv.size(); ++i) { 15313786Sjavier.bueno@metempsy.com arg_data_size += argv[i].size() + 1; 15413786Sjavier.bueno@metempsy.com } 15513786Sjavier.bueno@metempsy.com 15613786Sjavier.bueno@metempsy.com int info_block_size = 15713786Sjavier.bueno@metempsy.com sentry_size + env_data_size + arg_data_size + 15813786Sjavier.bueno@metempsy.com aux_data_size + platform_size; 15913786Sjavier.bueno@metempsy.com 16013786Sjavier.bueno@metempsy.com //Each auxilliary vector is two 4 byte words 16113786Sjavier.bueno@metempsy.com int aux_array_size = intSize * 2 * (auxv.size() + 1); 16213786Sjavier.bueno@metempsy.com 16313786Sjavier.bueno@metempsy.com int envp_array_size = intSize * (envp.size() + 1); 16413786Sjavier.bueno@metempsy.com int argv_array_size = intSize * (argv.size() + 1); 16513786Sjavier.bueno@metempsy.com 16613786Sjavier.bueno@metempsy.com int argc_size = intSize; 16713786Sjavier.bueno@metempsy.com 16813786Sjavier.bueno@metempsy.com //Figure out the size of the contents of the actual initial frame 16913786Sjavier.bueno@metempsy.com int frame_size = 17013786Sjavier.bueno@metempsy.com info_block_size + 17113786Sjavier.bueno@metempsy.com aux_array_size + 17213786Sjavier.bueno@metempsy.com envp_array_size + 17313786Sjavier.bueno@metempsy.com argv_array_size + 17413786Sjavier.bueno@metempsy.com argc_size; 17513786Sjavier.bueno@metempsy.com 17613786Sjavier.bueno@metempsy.com //There needs to be padding after the auxiliary vector data so that the 17713786Sjavier.bueno@metempsy.com //very bottom of the stack is aligned properly. 17813786Sjavier.bueno@metempsy.com int partial_size = frame_size; 17913786Sjavier.bueno@metempsy.com int aligned_partial_size = roundUp(partial_size, align); 18013786Sjavier.bueno@metempsy.com int aux_padding = aligned_partial_size - partial_size; 18113786Sjavier.bueno@metempsy.com 18213786Sjavier.bueno@metempsy.com int space_needed = frame_size + aux_padding; 18313786Sjavier.bueno@metempsy.com 18413786Sjavier.bueno@metempsy.com stack_min = stack_base - space_needed; 18513786Sjavier.bueno@metempsy.com stack_min = roundDown(stack_min, align); 18613786Sjavier.bueno@metempsy.com stack_size = stack_base - stack_min; 18713786Sjavier.bueno@metempsy.com 18813786Sjavier.bueno@metempsy.com // map memory 18913786Sjavier.bueno@metempsy.com pTable->allocate(roundDown(stack_min, pageSize), 19013786Sjavier.bueno@metempsy.com roundUp(stack_size, pageSize)); 19113786Sjavier.bueno@metempsy.com 19213786Sjavier.bueno@metempsy.com // map out initial stack contents 19313786Sjavier.bueno@metempsy.com uint32_t sentry_base = stack_base - sentry_size; 19413786Sjavier.bueno@metempsy.com uint32_t aux_data_base = sentry_base - aux_data_size; 19513786Sjavier.bueno@metempsy.com uint32_t env_data_base = aux_data_base - env_data_size; 19613786Sjavier.bueno@metempsy.com uint32_t arg_data_base = env_data_base - arg_data_size; 19713786Sjavier.bueno@metempsy.com uint32_t platform_base = arg_data_base - platform_size; 198 uint32_t auxv_array_base = platform_base - aux_array_size - aux_padding; 199 uint32_t envp_array_base = auxv_array_base - envp_array_size; 200 uint32_t argv_array_base = envp_array_base - argv_array_size; 201 uint32_t argc_base = argv_array_base - argc_size; 202 203 DPRINTF(Stack, "The addresses of items on the initial stack:\n"); 204 DPRINTF(Stack, "0x%x - aux data\n", aux_data_base); 205 DPRINTF(Stack, "0x%x - env data\n", env_data_base); 206 DPRINTF(Stack, "0x%x - arg data\n", arg_data_base); 207 DPRINTF(Stack, "0x%x - platform base\n", platform_base); 208 DPRINTF(Stack, "0x%x - auxv array\n", auxv_array_base); 209 DPRINTF(Stack, "0x%x - envp array\n", envp_array_base); 210 DPRINTF(Stack, "0x%x - argv array\n", argv_array_base); 211 DPRINTF(Stack, "0x%x - argc \n", argc_base); 212 DPRINTF(Stack, "0x%x - stack min\n", stack_min); 213 214 // write contents to stack 215 216 // figure out argc 217 uint32_t argc = argv.size(); 218 uint32_t guestArgc = PowerISA::htog(argc); 219 220 //Write out the sentry void * 221 uint32_t sentry_NULL = 0; 222 initVirtMem->writeBlob(sentry_base, 223 (uint8_t*)&sentry_NULL, sentry_size); 224 225 //Fix up the aux vectors which point to other data 226 for (int i = auxv.size() - 1; i >= 0; i--) { 227 if (auxv[i].a_type == M5_AT_PLATFORM) { 228 auxv[i].a_val = platform_base; 229 initVirtMem->writeString(platform_base, platform.c_str()); 230 } else if (auxv[i].a_type == M5_AT_EXECFN) { 231 auxv[i].a_val = aux_data_base; 232 initVirtMem->writeString(aux_data_base, filename.c_str()); 233 } 234 } 235 236 //Copy the aux stuff 237 for (int x = 0; x < auxv.size(); x++) 238 { 239 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize, 240 (uint8_t*)&(auxv[x].a_type), intSize); 241 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize, 242 (uint8_t*)&(auxv[x].a_val), intSize); 243 } 244 //Write out the terminating zeroed auxilliary vector 245 const uint64_t zero = 0; 246 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(), 247 (uint8_t*)&zero, 2 * intSize); 248 249 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); 250 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); 251 252 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize); 253 254 ThreadContext *tc = system->getThreadContext(contextIds[0]); 255 256 //Set the stack pointer register 257 tc->setIntReg(StackPointerReg, stack_min); 258 259 Addr prog_entry = objFile->entryPoint(); 260 tc->setPC(prog_entry); 261 tc->setNextPC(prog_entry + sizeof(MachInst)); 262 263 //Align the "stack_min" to a page boundary. 264 stack_min = roundDown(stack_min, pageSize); 265} 266 267PowerISA::IntReg 268PowerLiveProcess::getSyscallArg(ThreadContext *tc, int &i) 269{ 270 assert(i < 5); 271 return tc->readIntReg(ArgumentReg0 + i++); 272} 273 274void 275PowerLiveProcess::setSyscallArg(ThreadContext *tc, 276 int i, PowerISA::IntReg val) 277{ 278 assert(i < 5); 279 tc->setIntReg(ArgumentReg0 + i, val); 280} 281 282void 283PowerLiveProcess::setSyscallReturn(ThreadContext *tc, 284 SyscallReturn return_value) 285{ 286 Cr cr = tc->readIntReg(INTREG_CR); 287 if (return_value.successful()) { 288 cr.cr0.so = 0; 289 } else { 290 cr.cr0.so = 1; 291 } 292 tc->setIntReg(INTREG_CR, cr); 293 tc->setIntReg(ReturnValueReg, return_value.value()); 294} 295