process.cc revision 12460
14166Sgblack@eecs.umich.edu/* 210554Salexandru.dutu@amd.com * Copyright (c) 2014 Advanced Micro Devices, Inc. 37087Snate@binkert.org * Copyright (c) 2007 The Hewlett-Packard Development Company 47087Snate@binkert.org * All rights reserved. 57087Snate@binkert.org * 67087Snate@binkert.org * The license below extends only to copyright in the software and shall 77087Snate@binkert.org * not be construed as granting a license to any other intellectual 87087Snate@binkert.org * property including but not limited to intellectual property relating 97087Snate@binkert.org * to a hardware implementation of the functionality of the software 107087Snate@binkert.org * licensed hereunder. You may use the software subject to the license 117087Snate@binkert.org * terms below provided that you ensure that this notice is replicated 127087Snate@binkert.org * unmodified and in its entirety in all distributions of the software, 137087Snate@binkert.org * modified or unmodified, in source code or in binary form. 147087Snate@binkert.org * 154166Sgblack@eecs.umich.edu * Copyright (c) 2003-2006 The Regents of The University of Michigan 164166Sgblack@eecs.umich.edu * All rights reserved. 174166Sgblack@eecs.umich.edu * 184166Sgblack@eecs.umich.edu * Redistribution and use in source and binary forms, with or without 194166Sgblack@eecs.umich.edu * modification, are permitted provided that the following conditions are 204166Sgblack@eecs.umich.edu * met: redistributions of source code must retain the above copyright 214166Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer; 224166Sgblack@eecs.umich.edu * redistributions in binary form must reproduce the above copyright 234166Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer in the 244166Sgblack@eecs.umich.edu * documentation and/or other materials provided with the distribution; 254166Sgblack@eecs.umich.edu * neither the name of the copyright holders nor the names of its 264166Sgblack@eecs.umich.edu * contributors may be used to endorse or promote products derived from 274166Sgblack@eecs.umich.edu * this software without specific prior written permission. 284166Sgblack@eecs.umich.edu * 294166Sgblack@eecs.umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 304166Sgblack@eecs.umich.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 314166Sgblack@eecs.umich.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 324166Sgblack@eecs.umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 334166Sgblack@eecs.umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 344166Sgblack@eecs.umich.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 354166Sgblack@eecs.umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 364166Sgblack@eecs.umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 374166Sgblack@eecs.umich.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 384166Sgblack@eecs.umich.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 394166Sgblack@eecs.umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 404166Sgblack@eecs.umich.edu * 414166Sgblack@eecs.umich.edu * Authors: Gabe Black 424166Sgblack@eecs.umich.edu * Ali Saidi 434166Sgblack@eecs.umich.edu */ 444166Sgblack@eecs.umich.edu 4511793Sbrandon.potter@amd.com#include "arch/x86/process.hh" 4611793Sbrandon.potter@amd.com 4711854Sbrandon.potter@amd.com#include <string> 4811854Sbrandon.potter@amd.com#include <vector> 4911854Sbrandon.potter@amd.com 5011793Sbrandon.potter@amd.com#include "arch/x86/isa_traits.hh" 518229Snate@binkert.org#include "arch/x86/regs/misc.hh" 528229Snate@binkert.org#include "arch/x86/regs/segment.hh" 5310554Salexandru.dutu@amd.com#include "arch/x86/system.hh" 544166Sgblack@eecs.umich.edu#include "arch/x86/types.hh" 558229Snate@binkert.org#include "base/loader/elf_object.hh" 564166Sgblack@eecs.umich.edu#include "base/loader/object_file.hh" 5712334Sgabeblack@google.com#include "base/logging.hh" 585004Sgblack@eecs.umich.edu#include "base/trace.hh" 594166Sgblack@eecs.umich.edu#include "cpu/thread_context.hh" 608232Snate@binkert.org#include "debug/Stack.hh" 6110554Salexandru.dutu@amd.com#include "mem/multi_level_page_table.hh" 624166Sgblack@eecs.umich.edu#include "mem/page_table.hh" 6312431Sgabeblack@google.com#include "params/Process.hh" 6411854Sbrandon.potter@amd.com#include "sim/aux_vector.hh" 654434Ssaidi@eecs.umich.edu#include "sim/process_impl.hh" 6611794Sbrandon.potter@amd.com#include "sim/syscall_desc.hh" 6711800Sbrandon.potter@amd.com#include "sim/syscall_return.hh" 684166Sgblack@eecs.umich.edu#include "sim/system.hh" 694166Sgblack@eecs.umich.edu 704166Sgblack@eecs.umich.eduusing namespace std; 714166Sgblack@eecs.umich.eduusing namespace X86ISA; 724166Sgblack@eecs.umich.edu 735958Sgblack@eecs.umich.edustatic const int ArgumentReg[] = { 745958Sgblack@eecs.umich.edu INTREG_RDI, 755958Sgblack@eecs.umich.edu INTREG_RSI, 765958Sgblack@eecs.umich.edu INTREG_RDX, 7711906SBrandon.Potter@amd.com // This argument register is r10 for syscalls and rcx for C. 785958Sgblack@eecs.umich.edu INTREG_R10W, 7911906SBrandon.Potter@amd.com // INTREG_RCX, 805958Sgblack@eecs.umich.edu INTREG_R8W, 815958Sgblack@eecs.umich.edu INTREG_R9W 825958Sgblack@eecs.umich.edu}; 8311704Santhony.gutierrez@amd.com 8411704Santhony.gutierrez@amd.comstatic const int NumArgumentRegs M5_VAR_USED = 8511704Santhony.gutierrez@amd.com sizeof(ArgumentReg) / sizeof(const int); 8611704Santhony.gutierrez@amd.com 875959Sgblack@eecs.umich.edustatic const int ArgumentReg32[] = { 885959Sgblack@eecs.umich.edu INTREG_EBX, 895959Sgblack@eecs.umich.edu INTREG_ECX, 905959Sgblack@eecs.umich.edu INTREG_EDX, 915959Sgblack@eecs.umich.edu INTREG_ESI, 925959Sgblack@eecs.umich.edu INTREG_EDI, 9311385Sbrandon.potter@amd.com INTREG_EBP 945959Sgblack@eecs.umich.edu}; 9511704Santhony.gutierrez@amd.com 9611704Santhony.gutierrez@amd.comstatic const int NumArgumentRegs32 M5_VAR_USED = 9711704Santhony.gutierrez@amd.com sizeof(ArgumentReg) / sizeof(const int); 984166Sgblack@eecs.umich.edu 9912460Sgabeblack@google.comtemplate class MultiLevelPageTable<LongModePTE<47, 39>, 10012460Sgabeblack@google.com LongModePTE<38, 30>, 10112460Sgabeblack@google.com LongModePTE<29, 21>, 10212460Sgabeblack@google.com LongModePTE<20, 12> >; 10312460Sgabeblack@google.comtypedef MultiLevelPageTable<LongModePTE<47, 39>, 10412460Sgabeblack@google.com LongModePTE<38, 30>, 10512460Sgabeblack@google.com LongModePTE<29, 21>, 10612460Sgabeblack@google.com LongModePTE<20, 12> > ArchPageTable; 10712460Sgabeblack@google.com 10812431Sgabeblack@google.comX86Process::X86Process(ProcessParams *params, ObjectFile *objFile, 10911851Sbrandon.potter@amd.com SyscallDesc *_syscallDescs, int _numSyscallDescs) 11012431Sgabeblack@google.com : Process(params, params->useArchPT ? 11112448Sgabeblack@google.com static_cast<EmulationPageTable *>( 11212460Sgabeblack@google.com new ArchPageTable(params->name, params->pid, 11312460Sgabeblack@google.com params->system, PageBytes)) : 11412448Sgabeblack@google.com new EmulationPageTable(params->name, params->pid, 11512448Sgabeblack@google.com PageBytes), 11612431Sgabeblack@google.com objFile), 11712431Sgabeblack@google.com syscallDescs(_syscallDescs), numSyscallDescs(_numSyscallDescs) 1184166Sgblack@eecs.umich.edu{ 11911886Sbrandon.potter@amd.com} 12011886Sbrandon.potter@amd.com 12111886Sbrandon.potter@amd.comvoid X86Process::clone(ThreadContext *old_tc, ThreadContext *new_tc, 12211886Sbrandon.potter@amd.com Process *p, TheISA::IntReg flags) 12311886Sbrandon.potter@amd.com{ 12411886Sbrandon.potter@amd.com Process::clone(old_tc, new_tc, p, flags); 12511886Sbrandon.potter@amd.com X86Process *process = (X86Process*)p; 12611886Sbrandon.potter@amd.com *process = *this; 1275956Sgblack@eecs.umich.edu} 1284166Sgblack@eecs.umich.edu 12911851Sbrandon.potter@amd.comX86_64Process::X86_64Process(ProcessParams *params, ObjectFile *objFile, 13011851Sbrandon.potter@amd.com SyscallDesc *_syscallDescs, int _numSyscallDescs) 13111851Sbrandon.potter@amd.com : X86Process(params, objFile, _syscallDescs, _numSyscallDescs) 1325956Sgblack@eecs.umich.edu{ 1336709Svince@csl.cornell.edu 1346709Svince@csl.cornell.edu vsyscallPage.base = 0xffffffffff600000ULL; 13510318Sandreas.hansson@arm.com vsyscallPage.size = PageBytes; 1366709Svince@csl.cornell.edu vsyscallPage.vtimeOffset = 0x400; 1379679Smjleven@sandia.gov vsyscallPage.vgettimeofdayOffset = 0x0; 1386709Svince@csl.cornell.edu 13911905SBrandon.Potter@amd.com Addr brk_point = roundUp(objFile->dataBase() + objFile->dataSize() + 14011905SBrandon.Potter@amd.com objFile->bssSize(), PageBytes); 14111905SBrandon.Potter@amd.com Addr stack_base = 0x7FFFFFFFF000ULL; 14211905SBrandon.Potter@amd.com Addr max_stack_size = 8 * 1024 * 1024; 14311905SBrandon.Potter@amd.com Addr next_thread_stack_base = stack_base - max_stack_size; 14411905SBrandon.Potter@amd.com Addr mmap_end = 0x7FFFF7FFF000ULL; 1454166Sgblack@eecs.umich.edu 14611905SBrandon.Potter@amd.com memState = make_shared<MemState>(brk_point, stack_base, max_stack_size, 14711905SBrandon.Potter@amd.com next_thread_stack_base, mmap_end); 1484166Sgblack@eecs.umich.edu} 1494166Sgblack@eecs.umich.edu 1505973Sgblack@eecs.umich.eduvoid 15111877Sbrandon.potter@amd.comI386Process::syscall(int64_t callnum, ThreadContext *tc, Fault *fault) 1525973Sgblack@eecs.umich.edu{ 1537720Sgblack@eecs.umich.edu TheISA::PCState pc = tc->pcState(); 1547720Sgblack@eecs.umich.edu Addr eip = pc.pc(); 1555973Sgblack@eecs.umich.edu if (eip >= vsyscallPage.base && 1565973Sgblack@eecs.umich.edu eip < vsyscallPage.base + vsyscallPage.size) { 1577720Sgblack@eecs.umich.edu pc.npc(vsyscallPage.base + vsyscallPage.vsysexitOffset); 1587720Sgblack@eecs.umich.edu tc->pcState(pc); 1595973Sgblack@eecs.umich.edu } 16011877Sbrandon.potter@amd.com X86Process::syscall(callnum, tc, fault); 1615973Sgblack@eecs.umich.edu} 1625973Sgblack@eecs.umich.edu 1635973Sgblack@eecs.umich.edu 16411851Sbrandon.potter@amd.comI386Process::I386Process(ProcessParams *params, ObjectFile *objFile, 16511851Sbrandon.potter@amd.com SyscallDesc *_syscallDescs, int _numSyscallDescs) 16611851Sbrandon.potter@amd.com : X86Process(params, objFile, _syscallDescs, _numSyscallDescs) 1674166Sgblack@eecs.umich.edu{ 1689026Sgblack@eecs.umich.edu _gdtStart = ULL(0xffffd000); 16910318Sandreas.hansson@arm.com _gdtSize = PageBytes; 1705973Sgblack@eecs.umich.edu 1715973Sgblack@eecs.umich.edu vsyscallPage.base = 0xffffe000ULL; 17210318Sandreas.hansson@arm.com vsyscallPage.size = PageBytes; 1735973Sgblack@eecs.umich.edu vsyscallPage.vsyscallOffset = 0x400; 1745973Sgblack@eecs.umich.edu vsyscallPage.vsysexitOffset = 0x410; 1755973Sgblack@eecs.umich.edu 17611905SBrandon.Potter@amd.com Addr brk_point = roundUp(objFile->dataBase() + objFile->dataSize() + 17711905SBrandon.Potter@amd.com objFile->bssSize(), PageBytes); 17811905SBrandon.Potter@amd.com Addr stack_base = _gdtStart; 17911905SBrandon.Potter@amd.com Addr max_stack_size = 8 * 1024 * 1024; 18011905SBrandon.Potter@amd.com Addr next_thread_stack_base = stack_base - max_stack_size; 18111905SBrandon.Potter@amd.com Addr mmap_end = 0xB7FFF000ULL; 1825956Sgblack@eecs.umich.edu 18311905SBrandon.Potter@amd.com memState = make_shared<MemState>(brk_point, stack_base, max_stack_size, 18411905SBrandon.Potter@amd.com next_thread_stack_base, mmap_end); 1855956Sgblack@eecs.umich.edu} 1865956Sgblack@eecs.umich.edu 1875956Sgblack@eecs.umich.eduSyscallDesc* 18811851Sbrandon.potter@amd.comX86Process::getDesc(int callnum) 1895956Sgblack@eecs.umich.edu{ 1905956Sgblack@eecs.umich.edu if (callnum < 0 || callnum >= numSyscallDescs) 1915956Sgblack@eecs.umich.edu return NULL; 1925956Sgblack@eecs.umich.edu return &syscallDescs[callnum]; 1934166Sgblack@eecs.umich.edu} 1944166Sgblack@eecs.umich.edu 1954166Sgblack@eecs.umich.eduvoid 19611851Sbrandon.potter@amd.comX86_64Process::initState() 1974166Sgblack@eecs.umich.edu{ 19811851Sbrandon.potter@amd.com X86Process::initState(); 1995183Ssaidi@eecs.umich.edu 20011884Sbrandon.potter@amd.com argsInit(PageBytes); 2015140Sgblack@eecs.umich.edu 20211906SBrandon.Potter@amd.com // Set up the vsyscall page for this process. 2038601Ssteve.reinhardt@amd.com allocateMem(vsyscallPage.base, vsyscallPage.size); 2046709Svince@csl.cornell.edu uint8_t vtimeBlob[] = { 2056709Svince@csl.cornell.edu 0x48,0xc7,0xc0,0xc9,0x00,0x00,0x00, // mov $0xc9,%rax 2066709Svince@csl.cornell.edu 0x0f,0x05, // syscall 2076709Svince@csl.cornell.edu 0xc3 // retq 2086709Svince@csl.cornell.edu }; 2098852Sandreas.hansson@arm.com initVirtMem.writeBlob(vsyscallPage.base + vsyscallPage.vtimeOffset, 2106709Svince@csl.cornell.edu vtimeBlob, sizeof(vtimeBlob)); 2116709Svince@csl.cornell.edu 2126709Svince@csl.cornell.edu uint8_t vgettimeofdayBlob[] = { 2136709Svince@csl.cornell.edu 0x48,0xc7,0xc0,0x60,0x00,0x00,0x00, // mov $0x60,%rax 2146709Svince@csl.cornell.edu 0x0f,0x05, // syscall 2156709Svince@csl.cornell.edu 0xc3 // retq 2166709Svince@csl.cornell.edu }; 2178852Sandreas.hansson@arm.com initVirtMem.writeBlob(vsyscallPage.base + vsyscallPage.vgettimeofdayOffset, 2186709Svince@csl.cornell.edu vgettimeofdayBlob, sizeof(vgettimeofdayBlob)); 2196709Svince@csl.cornell.edu 22010554Salexandru.dutu@amd.com if (kvmInSE) { 22110554Salexandru.dutu@amd.com PortProxy physProxy = system->physProxy; 2225140Sgblack@eecs.umich.edu 22312458Sgabeblack@google.com Addr syscallCodePhysAddr = system->allocPhysPages(1); 22412458Sgabeblack@google.com Addr gdtPhysAddr = system->allocPhysPages(1); 22512458Sgabeblack@google.com Addr idtPhysAddr = system->allocPhysPages(1); 22612458Sgabeblack@google.com Addr istPhysAddr = system->allocPhysPages(1); 22712458Sgabeblack@google.com Addr tssPhysAddr = system->allocPhysPages(1); 22812458Sgabeblack@google.com Addr pfHandlerPhysAddr = system->allocPhysPages(1); 22912458Sgabeblack@google.com 23010554Salexandru.dutu@amd.com /* 23110554Salexandru.dutu@amd.com * Set up the gdt. 23210554Salexandru.dutu@amd.com */ 23310554Salexandru.dutu@amd.com uint8_t numGDTEntries = 0; 23410554Salexandru.dutu@amd.com uint64_t nullDescriptor = 0; 23512458Sgabeblack@google.com physProxy.writeBlob(gdtPhysAddr + numGDTEntries * 8, 23610554Salexandru.dutu@amd.com (uint8_t *)(&nullDescriptor), 8); 23710554Salexandru.dutu@amd.com numGDTEntries++; 2385140Sgblack@eecs.umich.edu 23910554Salexandru.dutu@amd.com SegDescriptor initDesc = 0; 24010554Salexandru.dutu@amd.com initDesc.type.codeOrData = 0; // code or data type 24110554Salexandru.dutu@amd.com initDesc.type.c = 0; // conforming 24210554Salexandru.dutu@amd.com initDesc.type.r = 1; // readable 24310554Salexandru.dutu@amd.com initDesc.dpl = 0; // privilege 24410554Salexandru.dutu@amd.com initDesc.p = 1; // present 24510554Salexandru.dutu@amd.com initDesc.l = 1; // longmode - 64 bit 24610554Salexandru.dutu@amd.com initDesc.d = 0; // operand size 24710554Salexandru.dutu@amd.com initDesc.g = 1; // granularity 24810554Salexandru.dutu@amd.com initDesc.s = 1; // system segment 24910554Salexandru.dutu@amd.com initDesc.limitHigh = 0xFFFF; 25010554Salexandru.dutu@amd.com initDesc.limitLow = 0xF; 25110554Salexandru.dutu@amd.com initDesc.baseHigh = 0x0; 25210554Salexandru.dutu@amd.com initDesc.baseLow = 0x0; 25310554Salexandru.dutu@amd.com 25410554Salexandru.dutu@amd.com //64 bit code segment 25510554Salexandru.dutu@amd.com SegDescriptor csLowPLDesc = initDesc; 25610554Salexandru.dutu@amd.com csLowPLDesc.type.codeOrData = 1; 25710554Salexandru.dutu@amd.com csLowPLDesc.dpl = 0; 25810554Salexandru.dutu@amd.com uint64_t csLowPLDescVal = csLowPLDesc; 25912458Sgabeblack@google.com physProxy.writeBlob(gdtPhysAddr + numGDTEntries * 8, 26010554Salexandru.dutu@amd.com (uint8_t *)(&csLowPLDescVal), 8); 26110554Salexandru.dutu@amd.com 26210554Salexandru.dutu@amd.com numGDTEntries++; 26310554Salexandru.dutu@amd.com 26410554Salexandru.dutu@amd.com SegSelector csLowPL = 0; 26510554Salexandru.dutu@amd.com csLowPL.si = numGDTEntries - 1; 26610554Salexandru.dutu@amd.com csLowPL.rpl = 0; 26710554Salexandru.dutu@amd.com 26810554Salexandru.dutu@amd.com //64 bit data segment 26910554Salexandru.dutu@amd.com SegDescriptor dsLowPLDesc = initDesc; 27010554Salexandru.dutu@amd.com dsLowPLDesc.type.codeOrData = 0; 27110554Salexandru.dutu@amd.com dsLowPLDesc.dpl = 0; 27210554Salexandru.dutu@amd.com uint64_t dsLowPLDescVal = dsLowPLDesc; 27312458Sgabeblack@google.com physProxy.writeBlob(gdtPhysAddr + numGDTEntries * 8, 27410554Salexandru.dutu@amd.com (uint8_t *)(&dsLowPLDescVal), 8); 27510554Salexandru.dutu@amd.com 27610554Salexandru.dutu@amd.com numGDTEntries++; 27710554Salexandru.dutu@amd.com 27810554Salexandru.dutu@amd.com SegSelector dsLowPL = 0; 27910554Salexandru.dutu@amd.com dsLowPL.si = numGDTEntries - 1; 28010554Salexandru.dutu@amd.com dsLowPL.rpl = 0; 28110554Salexandru.dutu@amd.com 28210554Salexandru.dutu@amd.com //64 bit data segment 28310554Salexandru.dutu@amd.com SegDescriptor dsDesc = initDesc; 28410554Salexandru.dutu@amd.com dsDesc.type.codeOrData = 0; 28510554Salexandru.dutu@amd.com dsDesc.dpl = 3; 28610554Salexandru.dutu@amd.com uint64_t dsDescVal = dsDesc; 28712458Sgabeblack@google.com physProxy.writeBlob(gdtPhysAddr + numGDTEntries * 8, 28810554Salexandru.dutu@amd.com (uint8_t *)(&dsDescVal), 8); 28910554Salexandru.dutu@amd.com 29010554Salexandru.dutu@amd.com numGDTEntries++; 29110554Salexandru.dutu@amd.com 29210554Salexandru.dutu@amd.com SegSelector ds = 0; 29310554Salexandru.dutu@amd.com ds.si = numGDTEntries - 1; 29410554Salexandru.dutu@amd.com ds.rpl = 3; 29510554Salexandru.dutu@amd.com 29610554Salexandru.dutu@amd.com //64 bit code segment 29710554Salexandru.dutu@amd.com SegDescriptor csDesc = initDesc; 29810554Salexandru.dutu@amd.com csDesc.type.codeOrData = 1; 29910554Salexandru.dutu@amd.com csDesc.dpl = 3; 30010554Salexandru.dutu@amd.com uint64_t csDescVal = csDesc; 30112458Sgabeblack@google.com physProxy.writeBlob(gdtPhysAddr + numGDTEntries * 8, 30210554Salexandru.dutu@amd.com (uint8_t *)(&csDescVal), 8); 30310554Salexandru.dutu@amd.com 30410554Salexandru.dutu@amd.com numGDTEntries++; 30510554Salexandru.dutu@amd.com 30610554Salexandru.dutu@amd.com SegSelector cs = 0; 30710554Salexandru.dutu@amd.com cs.si = numGDTEntries - 1; 30810554Salexandru.dutu@amd.com cs.rpl = 3; 30910554Salexandru.dutu@amd.com 31010554Salexandru.dutu@amd.com SegSelector scall = 0; 31110554Salexandru.dutu@amd.com scall.si = csLowPL.si; 31210554Salexandru.dutu@amd.com scall.rpl = 0; 31310554Salexandru.dutu@amd.com 31410554Salexandru.dutu@amd.com SegSelector sret = 0; 31510554Salexandru.dutu@amd.com sret.si = dsLowPL.si; 31610554Salexandru.dutu@amd.com sret.rpl = 3; 31710554Salexandru.dutu@amd.com 31810554Salexandru.dutu@amd.com /* In long mode the TSS has been extended to 16 Bytes */ 31910554Salexandru.dutu@amd.com TSSlow TSSDescLow = 0; 32010554Salexandru.dutu@amd.com TSSDescLow.type = 0xB; 32110554Salexandru.dutu@amd.com TSSDescLow.dpl = 0; // Privelege level 0 32210554Salexandru.dutu@amd.com TSSDescLow.p = 1; // Present 32310554Salexandru.dutu@amd.com TSSDescLow.g = 1; // Page granularity 32410554Salexandru.dutu@amd.com TSSDescLow.limitHigh = 0xF; 32510554Salexandru.dutu@amd.com TSSDescLow.limitLow = 0xFFFF; 32610590Sgabeblack@google.com TSSDescLow.baseLow = bits(TSSVirtAddr, 23, 0); 32710590Sgabeblack@google.com TSSDescLow.baseHigh = bits(TSSVirtAddr, 31, 24); 32810554Salexandru.dutu@amd.com 32910554Salexandru.dutu@amd.com TSShigh TSSDescHigh = 0; 33010590Sgabeblack@google.com TSSDescHigh.base = bits(TSSVirtAddr, 63, 32); 33110554Salexandru.dutu@amd.com 33210554Salexandru.dutu@amd.com struct TSSDesc { 33310554Salexandru.dutu@amd.com uint64_t low; 33410554Salexandru.dutu@amd.com uint64_t high; 33510554Salexandru.dutu@amd.com } tssDescVal = {TSSDescLow, TSSDescHigh}; 33610554Salexandru.dutu@amd.com 33712458Sgabeblack@google.com physProxy.writeBlob(gdtPhysAddr + numGDTEntries * 8, 33810554Salexandru.dutu@amd.com (uint8_t *)(&tssDescVal), sizeof(tssDescVal)); 33910554Salexandru.dutu@amd.com 34010554Salexandru.dutu@amd.com numGDTEntries++; 34110554Salexandru.dutu@amd.com 34210554Salexandru.dutu@amd.com SegSelector tssSel = 0; 34310554Salexandru.dutu@amd.com tssSel.si = numGDTEntries - 1; 34410554Salexandru.dutu@amd.com 34510590Sgabeblack@google.com uint64_t tss_base_addr = (TSSDescHigh.base << 32) | 34610590Sgabeblack@google.com (TSSDescLow.baseHigh << 24) | 34710590Sgabeblack@google.com TSSDescLow.baseLow; 34810554Salexandru.dutu@amd.com uint64_t tss_limit = TSSDescLow.limitLow | (TSSDescLow.limitHigh << 16); 34910554Salexandru.dutu@amd.com 35010554Salexandru.dutu@amd.com SegAttr tss_attr = 0; 35110554Salexandru.dutu@amd.com 35210554Salexandru.dutu@amd.com tss_attr.type = TSSDescLow.type; 35310554Salexandru.dutu@amd.com tss_attr.dpl = TSSDescLow.dpl; 35410554Salexandru.dutu@amd.com tss_attr.present = TSSDescLow.p; 35510554Salexandru.dutu@amd.com tss_attr.granularity = TSSDescLow.g; 35610554Salexandru.dutu@amd.com tss_attr.unusable = 0; 35710554Salexandru.dutu@amd.com 35810554Salexandru.dutu@amd.com for (int i = 0; i < contextIds.size(); i++) { 35910554Salexandru.dutu@amd.com ThreadContext * tc = system->getThreadContext(contextIds[i]); 36010554Salexandru.dutu@amd.com 36110590Sgabeblack@google.com tc->setMiscReg(MISCREG_CS, cs); 36210590Sgabeblack@google.com tc->setMiscReg(MISCREG_DS, ds); 36310590Sgabeblack@google.com tc->setMiscReg(MISCREG_ES, ds); 36410590Sgabeblack@google.com tc->setMiscReg(MISCREG_FS, ds); 36510590Sgabeblack@google.com tc->setMiscReg(MISCREG_GS, ds); 36610590Sgabeblack@google.com tc->setMiscReg(MISCREG_SS, ds); 36710554Salexandru.dutu@amd.com 36810554Salexandru.dutu@amd.com // LDT 36910554Salexandru.dutu@amd.com tc->setMiscReg(MISCREG_TSL, 0); 37010554Salexandru.dutu@amd.com SegAttr tslAttr = 0; 37110554Salexandru.dutu@amd.com tslAttr.present = 1; 37210554Salexandru.dutu@amd.com tslAttr.type = 2; 37310554Salexandru.dutu@amd.com tc->setMiscReg(MISCREG_TSL_ATTR, tslAttr); 37410554Salexandru.dutu@amd.com 37510554Salexandru.dutu@amd.com tc->setMiscReg(MISCREG_TSG_BASE, GDTVirtAddr); 37610554Salexandru.dutu@amd.com tc->setMiscReg(MISCREG_TSG_LIMIT, 8 * numGDTEntries - 1); 37710554Salexandru.dutu@amd.com 37810590Sgabeblack@google.com tc->setMiscReg(MISCREG_TR, tssSel); 37910590Sgabeblack@google.com tc->setMiscReg(MISCREG_TR_BASE, tss_base_addr); 38010590Sgabeblack@google.com tc->setMiscReg(MISCREG_TR_EFF_BASE, 0); 38110590Sgabeblack@google.com tc->setMiscReg(MISCREG_TR_LIMIT, tss_limit); 38210590Sgabeblack@google.com tc->setMiscReg(MISCREG_TR_ATTR, tss_attr); 38310554Salexandru.dutu@amd.com 38410554Salexandru.dutu@amd.com //Start using longmode segments. 38510554Salexandru.dutu@amd.com installSegDesc(tc, SEGMENT_REG_CS, csDesc, true); 38610554Salexandru.dutu@amd.com installSegDesc(tc, SEGMENT_REG_DS, dsDesc, true); 38710554Salexandru.dutu@amd.com installSegDesc(tc, SEGMENT_REG_ES, dsDesc, true); 38810554Salexandru.dutu@amd.com installSegDesc(tc, SEGMENT_REG_FS, dsDesc, true); 38910554Salexandru.dutu@amd.com installSegDesc(tc, SEGMENT_REG_GS, dsDesc, true); 39010554Salexandru.dutu@amd.com installSegDesc(tc, SEGMENT_REG_SS, dsDesc, true); 39110554Salexandru.dutu@amd.com 39210554Salexandru.dutu@amd.com Efer efer = 0; 39310554Salexandru.dutu@amd.com efer.sce = 1; // Enable system call extensions. 39410554Salexandru.dutu@amd.com efer.lme = 1; // Enable long mode. 39510554Salexandru.dutu@amd.com efer.lma = 1; // Activate long mode. 39610554Salexandru.dutu@amd.com efer.nxe = 0; // Enable nx support. 39710554Salexandru.dutu@amd.com efer.svme = 1; // Enable svm support for now. 39810554Salexandru.dutu@amd.com efer.ffxsr = 0; // Turn on fast fxsave and fxrstor. 39910554Salexandru.dutu@amd.com tc->setMiscReg(MISCREG_EFER, efer); 40010554Salexandru.dutu@amd.com 40110554Salexandru.dutu@amd.com //Set up the registers that describe the operating mode. 40210554Salexandru.dutu@amd.com CR0 cr0 = 0; 40310554Salexandru.dutu@amd.com cr0.pg = 1; // Turn on paging. 40410554Salexandru.dutu@amd.com cr0.cd = 0; // Don't disable caching. 40510554Salexandru.dutu@amd.com cr0.nw = 0; // This is bit is defined to be ignored. 40610554Salexandru.dutu@amd.com cr0.am = 1; // No alignment checking 40710554Salexandru.dutu@amd.com cr0.wp = 1; // Supervisor mode can write read only pages 40810554Salexandru.dutu@amd.com cr0.ne = 1; 40910554Salexandru.dutu@amd.com cr0.et = 1; // This should always be 1 41010554Salexandru.dutu@amd.com cr0.ts = 0; // We don't do task switching, so causing fp exceptions 41110554Salexandru.dutu@amd.com // would be pointless. 41210554Salexandru.dutu@amd.com cr0.em = 0; // Allow x87 instructions to execute natively. 41310554Salexandru.dutu@amd.com cr0.mp = 1; // This doesn't really matter, but the manual suggests 41410554Salexandru.dutu@amd.com // setting it to one. 41510554Salexandru.dutu@amd.com cr0.pe = 1; // We're definitely in protected mode. 41610554Salexandru.dutu@amd.com tc->setMiscReg(MISCREG_CR0, cr0); 41710554Salexandru.dutu@amd.com 41810554Salexandru.dutu@amd.com CR0 cr2 = 0; 41910554Salexandru.dutu@amd.com tc->setMiscReg(MISCREG_CR2, cr2); 42010554Salexandru.dutu@amd.com 42112458Sgabeblack@google.com CR3 cr3 = dynamic_cast<ArchPageTable *>(pTable)->basePtr(); 42210554Salexandru.dutu@amd.com tc->setMiscReg(MISCREG_CR3, cr3); 42310554Salexandru.dutu@amd.com 42410554Salexandru.dutu@amd.com CR4 cr4 = 0; 42510554Salexandru.dutu@amd.com //Turn on pae. 42610554Salexandru.dutu@amd.com cr4.osxsave = 1; // Enable XSAVE and Proc Extended States 42710554Salexandru.dutu@amd.com cr4.osxmmexcpt = 1; // Operating System Unmasked Exception 42810554Salexandru.dutu@amd.com cr4.osfxsr = 1; // Operating System FXSave/FSRSTOR Support 42910554Salexandru.dutu@amd.com cr4.pce = 0; // Performance-Monitoring Counter Enable 43010554Salexandru.dutu@amd.com cr4.pge = 0; // Page-Global Enable 43110554Salexandru.dutu@amd.com cr4.mce = 0; // Machine Check Enable 43210554Salexandru.dutu@amd.com cr4.pae = 1; // Physical-Address Extension 43310554Salexandru.dutu@amd.com cr4.pse = 0; // Page Size Extensions 43410554Salexandru.dutu@amd.com cr4.de = 0; // Debugging Extensions 43510554Salexandru.dutu@amd.com cr4.tsd = 0; // Time Stamp Disable 43610554Salexandru.dutu@amd.com cr4.pvi = 0; // Protected-Mode Virtual Interrupts 43710554Salexandru.dutu@amd.com cr4.vme = 0; // Virtual-8086 Mode Extensions 43810554Salexandru.dutu@amd.com 43910554Salexandru.dutu@amd.com tc->setMiscReg(MISCREG_CR4, cr4); 44010554Salexandru.dutu@amd.com 44110554Salexandru.dutu@amd.com CR4 cr8 = 0; 44210554Salexandru.dutu@amd.com tc->setMiscReg(MISCREG_CR8, cr8); 44310554Salexandru.dutu@amd.com 44410554Salexandru.dutu@amd.com tc->setMiscReg(MISCREG_MXCSR, 0x1f80); 44510554Salexandru.dutu@amd.com 44610554Salexandru.dutu@amd.com tc->setMiscReg(MISCREG_APIC_BASE, 0xfee00900); 44710554Salexandru.dutu@amd.com 44810590Sgabeblack@google.com tc->setMiscReg(MISCREG_TSG_BASE, GDTVirtAddr); 44910590Sgabeblack@google.com tc->setMiscReg(MISCREG_TSG_LIMIT, 0xffff); 45010554Salexandru.dutu@amd.com 45110590Sgabeblack@google.com tc->setMiscReg(MISCREG_IDTR_BASE, IDTVirtAddr); 45210590Sgabeblack@google.com tc->setMiscReg(MISCREG_IDTR_LIMIT, 0xffff); 45310554Salexandru.dutu@amd.com 45410554Salexandru.dutu@amd.com /* enabling syscall and sysret */ 45510554Salexandru.dutu@amd.com MiscReg star = ((MiscReg)sret << 48) | ((MiscReg)scall << 32); 45610554Salexandru.dutu@amd.com tc->setMiscReg(MISCREG_STAR, star); 45710590Sgabeblack@google.com MiscReg lstar = (MiscReg)syscallCodeVirtAddr; 45810554Salexandru.dutu@amd.com tc->setMiscReg(MISCREG_LSTAR, lstar); 45910590Sgabeblack@google.com MiscReg sfmask = (1 << 8) | (1 << 10); // TF | DF 46010554Salexandru.dutu@amd.com tc->setMiscReg(MISCREG_SF_MASK, sfmask); 4615140Sgblack@eecs.umich.edu } 4625140Sgblack@eecs.umich.edu 46310590Sgabeblack@google.com /* Set up the content of the TSS and write it to physical memory. */ 4645140Sgblack@eecs.umich.edu 46510554Salexandru.dutu@amd.com struct { 46610554Salexandru.dutu@amd.com uint32_t reserved0; // +00h 46710554Salexandru.dutu@amd.com uint32_t RSP0_low; // +04h 46810554Salexandru.dutu@amd.com uint32_t RSP0_high; // +08h 46910554Salexandru.dutu@amd.com uint32_t RSP1_low; // +0Ch 47010554Salexandru.dutu@amd.com uint32_t RSP1_high; // +10h 47110554Salexandru.dutu@amd.com uint32_t RSP2_low; // +14h 47210554Salexandru.dutu@amd.com uint32_t RSP2_high; // +18h 47310554Salexandru.dutu@amd.com uint32_t reserved1; // +1Ch 47410554Salexandru.dutu@amd.com uint32_t reserved2; // +20h 47510554Salexandru.dutu@amd.com uint32_t IST1_low; // +24h 47610554Salexandru.dutu@amd.com uint32_t IST1_high; // +28h 47710554Salexandru.dutu@amd.com uint32_t IST2_low; // +2Ch 47810554Salexandru.dutu@amd.com uint32_t IST2_high; // +30h 47910554Salexandru.dutu@amd.com uint32_t IST3_low; // +34h 48010554Salexandru.dutu@amd.com uint32_t IST3_high; // +38h 48110554Salexandru.dutu@amd.com uint32_t IST4_low; // +3Ch 48210554Salexandru.dutu@amd.com uint32_t IST4_high; // +40h 48310554Salexandru.dutu@amd.com uint32_t IST5_low; // +44h 48410554Salexandru.dutu@amd.com uint32_t IST5_high; // +48h 48510554Salexandru.dutu@amd.com uint32_t IST6_low; // +4Ch 48610554Salexandru.dutu@amd.com uint32_t IST6_high; // +50h 48710554Salexandru.dutu@amd.com uint32_t IST7_low; // +54h 48810554Salexandru.dutu@amd.com uint32_t IST7_high; // +58h 48910554Salexandru.dutu@amd.com uint32_t reserved3; // +5Ch 49010554Salexandru.dutu@amd.com uint32_t reserved4; // +60h 49110554Salexandru.dutu@amd.com uint16_t reserved5; // +64h 49210554Salexandru.dutu@amd.com uint16_t IO_MapBase; // +66h 49310554Salexandru.dutu@amd.com } tss; 4945140Sgblack@eecs.umich.edu 49510554Salexandru.dutu@amd.com /** setting Interrupt Stack Table */ 49610554Salexandru.dutu@amd.com uint64_t IST_start = ISTVirtAddr + PageBytes; 49710590Sgabeblack@google.com tss.IST1_low = IST_start; 49810590Sgabeblack@google.com tss.IST1_high = IST_start >> 32; 49910554Salexandru.dutu@amd.com tss.RSP0_low = tss.IST1_low; 50010554Salexandru.dutu@amd.com tss.RSP0_high = tss.IST1_high; 50110554Salexandru.dutu@amd.com tss.RSP1_low = tss.IST1_low; 50210554Salexandru.dutu@amd.com tss.RSP1_high = tss.IST1_high; 50310554Salexandru.dutu@amd.com tss.RSP2_low = tss.IST1_low; 50410554Salexandru.dutu@amd.com tss.RSP2_high = tss.IST1_high; 50512458Sgabeblack@google.com physProxy.writeBlob(tssPhysAddr, (uint8_t *)(&tss), sizeof(tss)); 5066140Sgblack@eecs.umich.edu 50710554Salexandru.dutu@amd.com /* Setting IDT gates */ 50810554Salexandru.dutu@amd.com GateDescriptorLow PFGateLow = 0; 50910590Sgabeblack@google.com PFGateLow.offsetHigh = bits(PFHandlerVirtAddr, 31, 16); 51010590Sgabeblack@google.com PFGateLow.offsetLow = bits(PFHandlerVirtAddr, 15, 0); 51110590Sgabeblack@google.com PFGateLow.selector = csLowPL; 51210554Salexandru.dutu@amd.com PFGateLow.p = 1; 51310554Salexandru.dutu@amd.com PFGateLow.dpl = 0; 51410554Salexandru.dutu@amd.com PFGateLow.type = 0xe; // gate interrupt type 51510554Salexandru.dutu@amd.com PFGateLow.IST = 0; // setting IST to 0 and using RSP0 5166609Sgblack@eecs.umich.edu 51710554Salexandru.dutu@amd.com GateDescriptorHigh PFGateHigh = 0; 51810590Sgabeblack@google.com PFGateHigh.offset = bits(PFHandlerVirtAddr, 63, 32); 51910554Salexandru.dutu@amd.com 52010554Salexandru.dutu@amd.com struct { 52110554Salexandru.dutu@amd.com uint64_t low; 52210554Salexandru.dutu@amd.com uint64_t high; 52310554Salexandru.dutu@amd.com } PFGate = {PFGateLow, PFGateHigh}; 52410554Salexandru.dutu@amd.com 52512458Sgabeblack@google.com physProxy.writeBlob(idtPhysAddr + 0xE0, 52610554Salexandru.dutu@amd.com (uint8_t *)(&PFGate), sizeof(PFGate)); 52710554Salexandru.dutu@amd.com 52810590Sgabeblack@google.com /* System call handler */ 52910554Salexandru.dutu@amd.com uint8_t syscallBlob[] = { 53010590Sgabeblack@google.com // mov %rax, (0xffffc90000005600) 53110590Sgabeblack@google.com 0x48, 0xa3, 0x00, 0x60, 0x00, 53210590Sgabeblack@google.com 0x00, 0x00, 0xc9, 0xff, 0xff, 53310590Sgabeblack@google.com // sysret 53410590Sgabeblack@google.com 0x48, 0x0f, 0x07 53510554Salexandru.dutu@amd.com }; 53610554Salexandru.dutu@amd.com 53710554Salexandru.dutu@amd.com physProxy.writeBlob(syscallCodePhysAddr, 53810554Salexandru.dutu@amd.com syscallBlob, sizeof(syscallBlob)); 53910554Salexandru.dutu@amd.com 54010554Salexandru.dutu@amd.com /** Page fault handler */ 54110554Salexandru.dutu@amd.com uint8_t faultBlob[] = { 54210590Sgabeblack@google.com // mov %rax, (0xffffc90000005700) 54310590Sgabeblack@google.com 0x48, 0xa3, 0x00, 0x61, 0x00, 54410590Sgabeblack@google.com 0x00, 0x00, 0xc9, 0xff, 0xff, 54510590Sgabeblack@google.com // add $0x8, %rsp # skip error 54610590Sgabeblack@google.com 0x48, 0x83, 0xc4, 0x08, 54710590Sgabeblack@google.com // iretq 54810590Sgabeblack@google.com 0x48, 0xcf 54910554Salexandru.dutu@amd.com }; 55010554Salexandru.dutu@amd.com 55112458Sgabeblack@google.com physProxy.writeBlob(pfHandlerPhysAddr, faultBlob, sizeof(faultBlob)); 55210554Salexandru.dutu@amd.com 55310554Salexandru.dutu@amd.com /* Syscall handler */ 55412460Sgabeblack@google.com pTable->map(syscallCodeVirtAddr, syscallCodePhysAddr, 55512460Sgabeblack@google.com PageBytes, false); 55610554Salexandru.dutu@amd.com /* GDT */ 55712460Sgabeblack@google.com pTable->map(GDTVirtAddr, gdtPhysAddr, PageBytes, false); 55810554Salexandru.dutu@amd.com /* IDT */ 55912460Sgabeblack@google.com pTable->map(IDTVirtAddr, idtPhysAddr, PageBytes, false); 56010554Salexandru.dutu@amd.com /* TSS */ 56112460Sgabeblack@google.com pTable->map(TSSVirtAddr, tssPhysAddr, PageBytes, false); 56210554Salexandru.dutu@amd.com /* IST */ 56312460Sgabeblack@google.com pTable->map(ISTVirtAddr, istPhysAddr, PageBytes, false); 56410554Salexandru.dutu@amd.com /* PF handler */ 56512460Sgabeblack@google.com pTable->map(PFHandlerVirtAddr, pfHandlerPhysAddr, PageBytes, false); 56610554Salexandru.dutu@amd.com /* MMIO region for m5ops */ 56712460Sgabeblack@google.com pTable->map(MMIORegionVirtAddr, MMIORegionPhysAddr, 56812460Sgabeblack@google.com 16 * PageBytes, false); 56910554Salexandru.dutu@amd.com } else { 57010554Salexandru.dutu@amd.com for (int i = 0; i < contextIds.size(); i++) { 57110554Salexandru.dutu@amd.com ThreadContext * tc = system->getThreadContext(contextIds[i]); 57210554Salexandru.dutu@amd.com 57310554Salexandru.dutu@amd.com SegAttr dataAttr = 0; 57410554Salexandru.dutu@amd.com dataAttr.dpl = 3; 57510554Salexandru.dutu@amd.com dataAttr.unusable = 0; 57610554Salexandru.dutu@amd.com dataAttr.defaultSize = 1; 57710554Salexandru.dutu@amd.com dataAttr.longMode = 1; 57810554Salexandru.dutu@amd.com dataAttr.avl = 0; 57910554Salexandru.dutu@amd.com dataAttr.granularity = 1; 58010554Salexandru.dutu@amd.com dataAttr.present = 1; 58110554Salexandru.dutu@amd.com dataAttr.type = 3; 58210554Salexandru.dutu@amd.com dataAttr.writable = 1; 58310554Salexandru.dutu@amd.com dataAttr.readable = 1; 58410554Salexandru.dutu@amd.com dataAttr.expandDown = 0; 58510554Salexandru.dutu@amd.com dataAttr.system = 1; 58610554Salexandru.dutu@amd.com 58711906SBrandon.Potter@amd.com // Initialize the segment registers. 58811321Ssteve.reinhardt@amd.com for (int seg = 0; seg < NUM_SEGMENTREGS; seg++) { 58910554Salexandru.dutu@amd.com tc->setMiscRegNoEffect(MISCREG_SEG_BASE(seg), 0); 59010554Salexandru.dutu@amd.com tc->setMiscRegNoEffect(MISCREG_SEG_EFF_BASE(seg), 0); 59110554Salexandru.dutu@amd.com tc->setMiscRegNoEffect(MISCREG_SEG_ATTR(seg), dataAttr); 59210554Salexandru.dutu@amd.com } 59310554Salexandru.dutu@amd.com 59410554Salexandru.dutu@amd.com SegAttr csAttr = 0; 59510554Salexandru.dutu@amd.com csAttr.dpl = 3; 59610554Salexandru.dutu@amd.com csAttr.unusable = 0; 59710554Salexandru.dutu@amd.com csAttr.defaultSize = 0; 59810554Salexandru.dutu@amd.com csAttr.longMode = 1; 59910554Salexandru.dutu@amd.com csAttr.avl = 0; 60010554Salexandru.dutu@amd.com csAttr.granularity = 1; 60110554Salexandru.dutu@amd.com csAttr.present = 1; 60210554Salexandru.dutu@amd.com csAttr.type = 10; 60310554Salexandru.dutu@amd.com csAttr.writable = 0; 60410554Salexandru.dutu@amd.com csAttr.readable = 1; 60510554Salexandru.dutu@amd.com csAttr.expandDown = 0; 60610554Salexandru.dutu@amd.com csAttr.system = 1; 60710554Salexandru.dutu@amd.com 60810554Salexandru.dutu@amd.com tc->setMiscRegNoEffect(MISCREG_CS_ATTR, csAttr); 60910554Salexandru.dutu@amd.com 61010554Salexandru.dutu@amd.com Efer efer = 0; 61110554Salexandru.dutu@amd.com efer.sce = 1; // Enable system call extensions. 61210554Salexandru.dutu@amd.com efer.lme = 1; // Enable long mode. 61310554Salexandru.dutu@amd.com efer.lma = 1; // Activate long mode. 61410554Salexandru.dutu@amd.com efer.nxe = 1; // Enable nx support. 61510554Salexandru.dutu@amd.com efer.svme = 0; // Disable svm support for now. It isn't implemented. 61610554Salexandru.dutu@amd.com efer.ffxsr = 1; // Turn on fast fxsave and fxrstor. 61710554Salexandru.dutu@amd.com tc->setMiscReg(MISCREG_EFER, efer); 61810554Salexandru.dutu@amd.com 61911906SBrandon.Potter@amd.com // Set up the registers that describe the operating mode. 62010554Salexandru.dutu@amd.com CR0 cr0 = 0; 62110554Salexandru.dutu@amd.com cr0.pg = 1; // Turn on paging. 62210554Salexandru.dutu@amd.com cr0.cd = 0; // Don't disable caching. 62310554Salexandru.dutu@amd.com cr0.nw = 0; // This is bit is defined to be ignored. 62410554Salexandru.dutu@amd.com cr0.am = 0; // No alignment checking 62510554Salexandru.dutu@amd.com cr0.wp = 0; // Supervisor mode can write read only pages 62610554Salexandru.dutu@amd.com cr0.ne = 1; 62710554Salexandru.dutu@amd.com cr0.et = 1; // This should always be 1 62810554Salexandru.dutu@amd.com cr0.ts = 0; // We don't do task switching, so causing fp exceptions 62910554Salexandru.dutu@amd.com // would be pointless. 63010554Salexandru.dutu@amd.com cr0.em = 0; // Allow x87 instructions to execute natively. 63110554Salexandru.dutu@amd.com cr0.mp = 1; // This doesn't really matter, but the manual suggests 63210554Salexandru.dutu@amd.com // setting it to one. 63310554Salexandru.dutu@amd.com cr0.pe = 1; // We're definitely in protected mode. 63410554Salexandru.dutu@amd.com tc->setMiscReg(MISCREG_CR0, cr0); 63510554Salexandru.dutu@amd.com 63610554Salexandru.dutu@amd.com tc->setMiscReg(MISCREG_MXCSR, 0x1f80); 63710554Salexandru.dutu@amd.com } 6385140Sgblack@eecs.umich.edu } 6394166Sgblack@eecs.umich.edu} 6404166Sgblack@eecs.umich.edu 6414166Sgblack@eecs.umich.eduvoid 64211851Sbrandon.potter@amd.comI386Process::initState() 6434166Sgblack@eecs.umich.edu{ 64411851Sbrandon.potter@amd.com X86Process::initState(); 6455956Sgblack@eecs.umich.edu 64611884Sbrandon.potter@amd.com argsInit(PageBytes); 6475956Sgblack@eecs.umich.edu 64811320Ssteve.reinhardt@amd.com /* 6495962Sgblack@eecs.umich.edu * Set up a GDT for this process. The whole GDT wouldn't really be for 6505962Sgblack@eecs.umich.edu * this process, but the only parts we care about are. 6515962Sgblack@eecs.umich.edu */ 6528601Ssteve.reinhardt@amd.com allocateMem(_gdtStart, _gdtSize); 6535962Sgblack@eecs.umich.edu uint64_t zero = 0; 6545962Sgblack@eecs.umich.edu assert(_gdtSize % sizeof(zero) == 0); 6555962Sgblack@eecs.umich.edu for (Addr gdtCurrent = _gdtStart; 6565962Sgblack@eecs.umich.edu gdtCurrent < _gdtStart + _gdtSize; gdtCurrent += sizeof(zero)) { 6578852Sandreas.hansson@arm.com initVirtMem.write(gdtCurrent, zero); 6585962Sgblack@eecs.umich.edu } 6595962Sgblack@eecs.umich.edu 6605973Sgblack@eecs.umich.edu // Set up the vsyscall page for this process. 6618601Ssteve.reinhardt@amd.com allocateMem(vsyscallPage.base, vsyscallPage.size); 6625973Sgblack@eecs.umich.edu uint8_t vsyscallBlob[] = { 6635973Sgblack@eecs.umich.edu 0x51, // push %ecx 6645973Sgblack@eecs.umich.edu 0x52, // push %edp 6655973Sgblack@eecs.umich.edu 0x55, // push %ebp 6665973Sgblack@eecs.umich.edu 0x89, 0xe5, // mov %esp, %ebp 6675973Sgblack@eecs.umich.edu 0x0f, 0x34 // sysenter 6685973Sgblack@eecs.umich.edu }; 6698852Sandreas.hansson@arm.com initVirtMem.writeBlob(vsyscallPage.base + vsyscallPage.vsyscallOffset, 6705973Sgblack@eecs.umich.edu vsyscallBlob, sizeof(vsyscallBlob)); 6715973Sgblack@eecs.umich.edu 6725973Sgblack@eecs.umich.edu uint8_t vsysexitBlob[] = { 6735973Sgblack@eecs.umich.edu 0x5d, // pop %ebp 6745973Sgblack@eecs.umich.edu 0x5a, // pop %edx 6755973Sgblack@eecs.umich.edu 0x59, // pop %ecx 6765973Sgblack@eecs.umich.edu 0xc3 // ret 6775973Sgblack@eecs.umich.edu }; 6788852Sandreas.hansson@arm.com initVirtMem.writeBlob(vsyscallPage.base + vsyscallPage.vsysexitOffset, 6795973Sgblack@eecs.umich.edu vsysexitBlob, sizeof(vsysexitBlob)); 6805973Sgblack@eecs.umich.edu 6815956Sgblack@eecs.umich.edu for (int i = 0; i < contextIds.size(); i++) { 6825956Sgblack@eecs.umich.edu ThreadContext * tc = system->getThreadContext(contextIds[i]); 6835956Sgblack@eecs.umich.edu 6845956Sgblack@eecs.umich.edu SegAttr dataAttr = 0; 6856222Sgblack@eecs.umich.edu dataAttr.dpl = 3; 6866222Sgblack@eecs.umich.edu dataAttr.unusable = 0; 6876222Sgblack@eecs.umich.edu dataAttr.defaultSize = 1; 6886222Sgblack@eecs.umich.edu dataAttr.longMode = 0; 6896222Sgblack@eecs.umich.edu dataAttr.avl = 0; 6906222Sgblack@eecs.umich.edu dataAttr.granularity = 1; 6916222Sgblack@eecs.umich.edu dataAttr.present = 1; 6926222Sgblack@eecs.umich.edu dataAttr.type = 3; 6935956Sgblack@eecs.umich.edu dataAttr.writable = 1; 6945956Sgblack@eecs.umich.edu dataAttr.readable = 1; 6955956Sgblack@eecs.umich.edu dataAttr.expandDown = 0; 6966222Sgblack@eecs.umich.edu dataAttr.system = 1; 6975956Sgblack@eecs.umich.edu 69811906SBrandon.Potter@amd.com // Initialize the segment registers. 69911321Ssteve.reinhardt@amd.com for (int seg = 0; seg < NUM_SEGMENTREGS; seg++) { 7005956Sgblack@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_SEG_BASE(seg), 0); 7015956Sgblack@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_SEG_EFF_BASE(seg), 0); 7025956Sgblack@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_SEG_ATTR(seg), dataAttr); 7035956Sgblack@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_SEG_SEL(seg), 0xB); 7045959Sgblack@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_SEG_LIMIT(seg), (uint32_t)(-1)); 7055956Sgblack@eecs.umich.edu } 7065956Sgblack@eecs.umich.edu 7075956Sgblack@eecs.umich.edu SegAttr csAttr = 0; 7086222Sgblack@eecs.umich.edu csAttr.dpl = 3; 7096222Sgblack@eecs.umich.edu csAttr.unusable = 0; 7106222Sgblack@eecs.umich.edu csAttr.defaultSize = 1; 7116222Sgblack@eecs.umich.edu csAttr.longMode = 0; 7126222Sgblack@eecs.umich.edu csAttr.avl = 0; 7136222Sgblack@eecs.umich.edu csAttr.granularity = 1; 7146222Sgblack@eecs.umich.edu csAttr.present = 1; 7156222Sgblack@eecs.umich.edu csAttr.type = 0xa; 7165956Sgblack@eecs.umich.edu csAttr.writable = 0; 7175956Sgblack@eecs.umich.edu csAttr.readable = 1; 7185956Sgblack@eecs.umich.edu csAttr.expandDown = 0; 7196222Sgblack@eecs.umich.edu csAttr.system = 1; 7205956Sgblack@eecs.umich.edu 7215956Sgblack@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_CS_ATTR, csAttr); 7225956Sgblack@eecs.umich.edu 7235962Sgblack@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_TSG_BASE, _gdtStart); 7245962Sgblack@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_TSG_EFF_BASE, _gdtStart); 7255962Sgblack@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_TSG_LIMIT, _gdtStart + _gdtSize - 1); 7265962Sgblack@eecs.umich.edu 7275963Sgblack@eecs.umich.edu // Set the LDT selector to 0 to deactivate it. 7285963Sgblack@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_TSL, 0); 7295963Sgblack@eecs.umich.edu 7306140Sgblack@eecs.umich.edu Efer efer = 0; 7316140Sgblack@eecs.umich.edu efer.sce = 1; // Enable system call extensions. 7326140Sgblack@eecs.umich.edu efer.lme = 1; // Enable long mode. 7336140Sgblack@eecs.umich.edu efer.lma = 0; // Deactivate long mode. 7346140Sgblack@eecs.umich.edu efer.nxe = 1; // Enable nx support. 7356140Sgblack@eecs.umich.edu efer.svme = 0; // Disable svm support for now. It isn't implemented. 7366140Sgblack@eecs.umich.edu efer.ffxsr = 1; // Turn on fast fxsave and fxrstor. 7376140Sgblack@eecs.umich.edu tc->setMiscReg(MISCREG_EFER, efer); 7386140Sgblack@eecs.umich.edu 73911906SBrandon.Potter@amd.com // Set up the registers that describe the operating mode. 7405956Sgblack@eecs.umich.edu CR0 cr0 = 0; 7415956Sgblack@eecs.umich.edu cr0.pg = 1; // Turn on paging. 7425956Sgblack@eecs.umich.edu cr0.cd = 0; // Don't disable caching. 7435956Sgblack@eecs.umich.edu cr0.nw = 0; // This is bit is defined to be ignored. 7445956Sgblack@eecs.umich.edu cr0.am = 0; // No alignment checking 7455956Sgblack@eecs.umich.edu cr0.wp = 0; // Supervisor mode can write read only pages 7465956Sgblack@eecs.umich.edu cr0.ne = 1; 7475956Sgblack@eecs.umich.edu cr0.et = 1; // This should always be 1 7485956Sgblack@eecs.umich.edu cr0.ts = 0; // We don't do task switching, so causing fp exceptions 7495956Sgblack@eecs.umich.edu // would be pointless. 7505956Sgblack@eecs.umich.edu cr0.em = 0; // Allow x87 instructions to execute natively. 7515956Sgblack@eecs.umich.edu cr0.mp = 1; // This doesn't really matter, but the manual suggests 7525956Sgblack@eecs.umich.edu // setting it to one. 7535956Sgblack@eecs.umich.edu cr0.pe = 1; // We're definitely in protected mode. 7545956Sgblack@eecs.umich.edu tc->setMiscReg(MISCREG_CR0, cr0); 7556609Sgblack@eecs.umich.edu 7566609Sgblack@eecs.umich.edu tc->setMiscReg(MISCREG_MXCSR, 0x1f80); 7575956Sgblack@eecs.umich.edu } 7585956Sgblack@eecs.umich.edu} 7595956Sgblack@eecs.umich.edu 7605956Sgblack@eecs.umich.edutemplate<class IntType> 7615956Sgblack@eecs.umich.eduvoid 76211851Sbrandon.potter@amd.comX86Process::argsInit(int pageSize, 76311884Sbrandon.potter@amd.com std::vector<AuxVector<IntType> > extraAuxvs) 7645956Sgblack@eecs.umich.edu{ 7655956Sgblack@eecs.umich.edu int intSize = sizeof(IntType); 7665956Sgblack@eecs.umich.edu 7675956Sgblack@eecs.umich.edu typedef AuxVector<IntType> auxv_t; 7685973Sgblack@eecs.umich.edu std::vector<auxv_t> auxv = extraAuxvs; 7695758Shsul@eecs.umich.edu 7704166Sgblack@eecs.umich.edu string filename; 77111321Ssteve.reinhardt@amd.com if (argv.size() < 1) 7724166Sgblack@eecs.umich.edu filename = ""; 7734166Sgblack@eecs.umich.edu else 7744166Sgblack@eecs.umich.edu filename = argv[0]; 7754166Sgblack@eecs.umich.edu 77611906SBrandon.Potter@amd.com // We want 16 byte alignment 7774849Sgblack@eecs.umich.edu uint64_t align = 16; 7784166Sgblack@eecs.umich.edu 77911389Sbrandon.potter@amd.com // Patch the ld_bias for dynamic executables. 78011389Sbrandon.potter@amd.com updateBias(); 78111389Sbrandon.potter@amd.com 7824166Sgblack@eecs.umich.edu // load object file into target memory 7834166Sgblack@eecs.umich.edu objFile->loadSections(initVirtMem); 7844166Sgblack@eecs.umich.edu 7854793Sgblack@eecs.umich.edu enum X86CpuFeature { 7864793Sgblack@eecs.umich.edu X86_OnboardFPU = 1 << 0, 7874793Sgblack@eecs.umich.edu X86_VirtualModeExtensions = 1 << 1, 7884793Sgblack@eecs.umich.edu X86_DebuggingExtensions = 1 << 2, 7894793Sgblack@eecs.umich.edu X86_PageSizeExtensions = 1 << 3, 7904777Sgblack@eecs.umich.edu 7914793Sgblack@eecs.umich.edu X86_TimeStampCounter = 1 << 4, 7924793Sgblack@eecs.umich.edu X86_ModelSpecificRegisters = 1 << 5, 7934793Sgblack@eecs.umich.edu X86_PhysicalAddressExtensions = 1 << 6, 7944793Sgblack@eecs.umich.edu X86_MachineCheckExtensions = 1 << 7, 7954777Sgblack@eecs.umich.edu 7964793Sgblack@eecs.umich.edu X86_CMPXCHG8Instruction = 1 << 8, 7974793Sgblack@eecs.umich.edu X86_OnboardAPIC = 1 << 9, 7984793Sgblack@eecs.umich.edu X86_SYSENTER_SYSEXIT = 1 << 11, 7994793Sgblack@eecs.umich.edu 8004793Sgblack@eecs.umich.edu X86_MemoryTypeRangeRegisters = 1 << 12, 8014793Sgblack@eecs.umich.edu X86_PageGlobalEnable = 1 << 13, 8024793Sgblack@eecs.umich.edu X86_MachineCheckArchitecture = 1 << 14, 8034793Sgblack@eecs.umich.edu X86_CMOVInstruction = 1 << 15, 8044793Sgblack@eecs.umich.edu 8054793Sgblack@eecs.umich.edu X86_PageAttributeTable = 1 << 16, 8064793Sgblack@eecs.umich.edu X86_36BitPSEs = 1 << 17, 8074793Sgblack@eecs.umich.edu X86_ProcessorSerialNumber = 1 << 18, 8084793Sgblack@eecs.umich.edu X86_CLFLUSHInstruction = 1 << 19, 8094793Sgblack@eecs.umich.edu 8104793Sgblack@eecs.umich.edu X86_DebugTraceStore = 1 << 21, 8114793Sgblack@eecs.umich.edu X86_ACPIViaMSR = 1 << 22, 8124793Sgblack@eecs.umich.edu X86_MultimediaExtensions = 1 << 23, 8134793Sgblack@eecs.umich.edu 8144793Sgblack@eecs.umich.edu X86_FXSAVE_FXRSTOR = 1 << 24, 8154793Sgblack@eecs.umich.edu X86_StreamingSIMDExtensions = 1 << 25, 8164793Sgblack@eecs.umich.edu X86_StreamingSIMDExtensions2 = 1 << 26, 8174793Sgblack@eecs.umich.edu X86_CPUSelfSnoop = 1 << 27, 8184793Sgblack@eecs.umich.edu 8194793Sgblack@eecs.umich.edu X86_HyperThreading = 1 << 28, 8204793Sgblack@eecs.umich.edu X86_AutomaticClockControl = 1 << 29, 8214793Sgblack@eecs.umich.edu X86_IA64Processor = 1 << 30 8224166Sgblack@eecs.umich.edu }; 8234166Sgblack@eecs.umich.edu 82411389Sbrandon.potter@amd.com // Setup the auxiliary vectors. These will already have endian 82511389Sbrandon.potter@amd.com // conversion. Auxiliary vectors are loaded only for elf formatted 82611389Sbrandon.potter@amd.com // executables; the auxv is responsible for passing information from 82711389Sbrandon.potter@amd.com // the OS to the interpreter. 8284166Sgblack@eecs.umich.edu ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile); 82910590Sgabeblack@google.com if (elfObject) { 8304793Sgblack@eecs.umich.edu uint64_t features = 8314793Sgblack@eecs.umich.edu X86_OnboardFPU | 8324793Sgblack@eecs.umich.edu X86_VirtualModeExtensions | 8334793Sgblack@eecs.umich.edu X86_DebuggingExtensions | 8344793Sgblack@eecs.umich.edu X86_PageSizeExtensions | 8354793Sgblack@eecs.umich.edu X86_TimeStampCounter | 8364793Sgblack@eecs.umich.edu X86_ModelSpecificRegisters | 8374793Sgblack@eecs.umich.edu X86_PhysicalAddressExtensions | 8384793Sgblack@eecs.umich.edu X86_MachineCheckExtensions | 8394793Sgblack@eecs.umich.edu X86_CMPXCHG8Instruction | 8404793Sgblack@eecs.umich.edu X86_OnboardAPIC | 8414793Sgblack@eecs.umich.edu X86_SYSENTER_SYSEXIT | 8424793Sgblack@eecs.umich.edu X86_MemoryTypeRangeRegisters | 8434793Sgblack@eecs.umich.edu X86_PageGlobalEnable | 8444793Sgblack@eecs.umich.edu X86_MachineCheckArchitecture | 8454793Sgblack@eecs.umich.edu X86_CMOVInstruction | 8464793Sgblack@eecs.umich.edu X86_PageAttributeTable | 8474793Sgblack@eecs.umich.edu X86_36BitPSEs | 8484793Sgblack@eecs.umich.edu// X86_ProcessorSerialNumber | 8494793Sgblack@eecs.umich.edu X86_CLFLUSHInstruction | 8504793Sgblack@eecs.umich.edu// X86_DebugTraceStore | 8514793Sgblack@eecs.umich.edu// X86_ACPIViaMSR | 8524793Sgblack@eecs.umich.edu X86_MultimediaExtensions | 8534793Sgblack@eecs.umich.edu X86_FXSAVE_FXRSTOR | 8544793Sgblack@eecs.umich.edu X86_StreamingSIMDExtensions | 8554793Sgblack@eecs.umich.edu X86_StreamingSIMDExtensions2 | 8564793Sgblack@eecs.umich.edu// X86_CPUSelfSnoop | 8574793Sgblack@eecs.umich.edu// X86_HyperThreading | 8584793Sgblack@eecs.umich.edu// X86_AutomaticClockControl | 8594793Sgblack@eecs.umich.edu// X86_IA64Processor | 8604793Sgblack@eecs.umich.edu 0; 8614793Sgblack@eecs.umich.edu 86211906SBrandon.Potter@amd.com // Bits which describe the system hardware capabilities 86311906SBrandon.Potter@amd.com // XXX Figure out what these should be 8644793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_HWCAP, features)); 86511906SBrandon.Potter@amd.com // The system page size 86610318Sandreas.hansson@arm.com auxv.push_back(auxv_t(M5_AT_PAGESZ, X86ISA::PageBytes)); 86711906SBrandon.Potter@amd.com // Frequency at which times() increments 86811906SBrandon.Potter@amd.com // Defined to be 100 in the kernel source. 8694793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_CLKTCK, 100)); 87011389Sbrandon.potter@amd.com // This is the virtual address of the program header tables if they 87111389Sbrandon.potter@amd.com // appear in the executable image. 8724793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable())); 8734166Sgblack@eecs.umich.edu // This is the size of a program header entry from the elf file. 8744793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize())); 8754166Sgblack@eecs.umich.edu // This is the number of program headers from the original elf file. 8764793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount())); 87711389Sbrandon.potter@amd.com // This is the base address of the ELF interpreter; it should be 87811389Sbrandon.potter@amd.com // zero for static executables or contain the base address for 87911389Sbrandon.potter@amd.com // dynamic executables. 88011389Sbrandon.potter@amd.com auxv.push_back(auxv_t(M5_AT_BASE, getBias())); 88111906SBrandon.Potter@amd.com // XXX Figure out what this should be. 8824793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_FLAGS, 0)); 88311906SBrandon.Potter@amd.com // The entry point to the program 8844793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint())); 88511906SBrandon.Potter@amd.com // Different user and group IDs 8864793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_UID, uid())); 8874793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_EUID, euid())); 8884793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_GID, gid())); 8894793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_EGID, egid())); 89011906SBrandon.Potter@amd.com // Whether to enable "secure mode" in the executable 8914793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_SECURE, 0)); 89211906SBrandon.Potter@amd.com // The address of 16 "random" bytes. 8937073Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_RANDOM, 0)); 89411906SBrandon.Potter@amd.com // The name of the program 8957073Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_EXECFN, 0)); 89611906SBrandon.Potter@amd.com // The platform string 8974793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_PLATFORM, 0)); 8984166Sgblack@eecs.umich.edu } 8994166Sgblack@eecs.umich.edu 90011906SBrandon.Potter@amd.com // Figure out how big the initial stack needs to be 9014166Sgblack@eecs.umich.edu 9024849Sgblack@eecs.umich.edu // A sentry NULL void pointer at the top of the stack. 9034849Sgblack@eecs.umich.edu int sentry_size = intSize; 9044166Sgblack@eecs.umich.edu 90511906SBrandon.Potter@amd.com // This is the name of the file which is present on the initial stack 90611906SBrandon.Potter@amd.com // It's purpose is to let the user space linker examine the original file. 9074847Sgblack@eecs.umich.edu int file_name_size = filename.size() + 1; 9084793Sgblack@eecs.umich.edu 9097073Sgblack@eecs.umich.edu const int numRandomBytes = 16; 9107073Sgblack@eecs.umich.edu int aux_data_size = numRandomBytes; 9117073Sgblack@eecs.umich.edu 9124793Sgblack@eecs.umich.edu string platform = "x86_64"; 9137073Sgblack@eecs.umich.edu aux_data_size += platform.size() + 1; 9144166Sgblack@eecs.umich.edu 9154166Sgblack@eecs.umich.edu int env_data_size = 0; 91610590Sgabeblack@google.com for (int i = 0; i < envp.size(); ++i) 9174847Sgblack@eecs.umich.edu env_data_size += envp[i].size() + 1; 9184166Sgblack@eecs.umich.edu int arg_data_size = 0; 91910590Sgabeblack@google.com for (int i = 0; i < argv.size(); ++i) 9204847Sgblack@eecs.umich.edu arg_data_size += argv[i].size() + 1; 9214166Sgblack@eecs.umich.edu 92211906SBrandon.Potter@amd.com // The info_block needs to be padded so its size is a multiple of the 92311906SBrandon.Potter@amd.com // alignment mask. Also, it appears that there needs to be at least some 92411906SBrandon.Potter@amd.com // padding, so if the size is already a multiple, we need to increase it 92511906SBrandon.Potter@amd.com // anyway. 9264849Sgblack@eecs.umich.edu int base_info_block_size = 9274849Sgblack@eecs.umich.edu sentry_size + file_name_size + env_data_size + arg_data_size; 9284166Sgblack@eecs.umich.edu 9294849Sgblack@eecs.umich.edu int info_block_size = roundUp(base_info_block_size, align); 9304849Sgblack@eecs.umich.edu 9314849Sgblack@eecs.umich.edu int info_block_padding = info_block_size - base_info_block_size; 9324166Sgblack@eecs.umich.edu 93311906SBrandon.Potter@amd.com // Each auxiliary vector is two 8 byte words 9344166Sgblack@eecs.umich.edu int aux_array_size = intSize * 2 * (auxv.size() + 1); 9354166Sgblack@eecs.umich.edu 9364166Sgblack@eecs.umich.edu int envp_array_size = intSize * (envp.size() + 1); 9374166Sgblack@eecs.umich.edu int argv_array_size = intSize * (argv.size() + 1); 9384166Sgblack@eecs.umich.edu 9394166Sgblack@eecs.umich.edu int argc_size = intSize; 9404166Sgblack@eecs.umich.edu 94111906SBrandon.Potter@amd.com // Figure out the size of the contents of the actual initial frame 9424849Sgblack@eecs.umich.edu int frame_size = 9434166Sgblack@eecs.umich.edu aux_array_size + 9444166Sgblack@eecs.umich.edu envp_array_size + 9454166Sgblack@eecs.umich.edu argv_array_size + 9464607Sgblack@eecs.umich.edu argc_size; 9474166Sgblack@eecs.umich.edu 94811906SBrandon.Potter@amd.com // There needs to be padding after the auxiliary vector data so that the 94911906SBrandon.Potter@amd.com // very bottom of the stack is aligned properly. 9504849Sgblack@eecs.umich.edu int partial_size = frame_size + aux_data_size; 9514849Sgblack@eecs.umich.edu int aligned_partial_size = roundUp(partial_size, align); 9524849Sgblack@eecs.umich.edu int aux_padding = aligned_partial_size - partial_size; 9534849Sgblack@eecs.umich.edu 9544849Sgblack@eecs.umich.edu int space_needed = 9554849Sgblack@eecs.umich.edu info_block_size + 9564849Sgblack@eecs.umich.edu aux_data_size + 9574849Sgblack@eecs.umich.edu aux_padding + 9584849Sgblack@eecs.umich.edu frame_size; 9594849Sgblack@eecs.umich.edu 96011905SBrandon.Potter@amd.com Addr stack_base = memState->getStackBase(); 96111905SBrandon.Potter@amd.com 96211905SBrandon.Potter@amd.com Addr stack_min = stack_base - space_needed; 96311905SBrandon.Potter@amd.com stack_min = roundDown(stack_min, align); 96411905SBrandon.Potter@amd.com 96511905SBrandon.Potter@amd.com unsigned stack_size = stack_base - stack_min; 96611905SBrandon.Potter@amd.com stack_size = roundUp(stack_size, pageSize); 96711905SBrandon.Potter@amd.com memState->setStackSize(stack_size); 9684166Sgblack@eecs.umich.edu 9694166Sgblack@eecs.umich.edu // map memory 97011905SBrandon.Potter@amd.com Addr stack_end = roundDown(stack_base - stack_size, pageSize); 97110554Salexandru.dutu@amd.com 97211905SBrandon.Potter@amd.com DPRINTF(Stack, "Mapping the stack: 0x%x %dB\n", stack_end, stack_size); 97311905SBrandon.Potter@amd.com allocateMem(stack_end, stack_size); 9744166Sgblack@eecs.umich.edu 9754166Sgblack@eecs.umich.edu // map out initial stack contents 97611905SBrandon.Potter@amd.com IntType sentry_base = stack_base - sentry_size; 9775956Sgblack@eecs.umich.edu IntType file_name_base = sentry_base - file_name_size; 9785956Sgblack@eecs.umich.edu IntType env_data_base = file_name_base - env_data_size; 9795956Sgblack@eecs.umich.edu IntType arg_data_base = env_data_base - arg_data_size; 9805956Sgblack@eecs.umich.edu IntType aux_data_base = arg_data_base - info_block_padding - aux_data_size; 9815956Sgblack@eecs.umich.edu IntType auxv_array_base = aux_data_base - aux_array_size - aux_padding; 9825956Sgblack@eecs.umich.edu IntType envp_array_base = auxv_array_base - envp_array_size; 9835956Sgblack@eecs.umich.edu IntType argv_array_base = envp_array_base - argv_array_size; 9845956Sgblack@eecs.umich.edu IntType argc_base = argv_array_base - argc_size; 9854166Sgblack@eecs.umich.edu 9865941Sgblack@eecs.umich.edu DPRINTF(Stack, "The addresses of items on the initial stack:\n"); 9875941Sgblack@eecs.umich.edu DPRINTF(Stack, "0x%x - file name\n", file_name_base); 9885941Sgblack@eecs.umich.edu DPRINTF(Stack, "0x%x - env data\n", env_data_base); 9895941Sgblack@eecs.umich.edu DPRINTF(Stack, "0x%x - arg data\n", arg_data_base); 9905941Sgblack@eecs.umich.edu DPRINTF(Stack, "0x%x - aux data\n", aux_data_base); 9915941Sgblack@eecs.umich.edu DPRINTF(Stack, "0x%x - auxv array\n", auxv_array_base); 9925941Sgblack@eecs.umich.edu DPRINTF(Stack, "0x%x - envp array\n", envp_array_base); 9935941Sgblack@eecs.umich.edu DPRINTF(Stack, "0x%x - argv array\n", argv_array_base); 9945941Sgblack@eecs.umich.edu DPRINTF(Stack, "0x%x - argc \n", argc_base); 99511905SBrandon.Potter@amd.com DPRINTF(Stack, "0x%x - stack min\n", stack_min); 9964166Sgblack@eecs.umich.edu 9974166Sgblack@eecs.umich.edu // write contents to stack 9984166Sgblack@eecs.umich.edu 9994166Sgblack@eecs.umich.edu // figure out argc 10005956Sgblack@eecs.umich.edu IntType argc = argv.size(); 10015956Sgblack@eecs.umich.edu IntType guestArgc = X86ISA::htog(argc); 10024166Sgblack@eecs.umich.edu 100311906SBrandon.Potter@amd.com // Write out the sentry void * 10045956Sgblack@eecs.umich.edu IntType sentry_NULL = 0; 100511906SBrandon.Potter@amd.com initVirtMem.writeBlob(sentry_base, (uint8_t*)&sentry_NULL, sentry_size); 10064166Sgblack@eecs.umich.edu 100711906SBrandon.Potter@amd.com // Write the file name 10088852Sandreas.hansson@arm.com initVirtMem.writeString(file_name_base, filename.c_str()); 10094166Sgblack@eecs.umich.edu 101011906SBrandon.Potter@amd.com // Fix up the aux vectors which point to data 10117073Sgblack@eecs.umich.edu assert(auxv[auxv.size() - 3].a_type == M5_AT_RANDOM); 10127073Sgblack@eecs.umich.edu auxv[auxv.size() - 3].a_val = aux_data_base; 10137073Sgblack@eecs.umich.edu assert(auxv[auxv.size() - 2].a_type == M5_AT_EXECFN); 10147073Sgblack@eecs.umich.edu auxv[auxv.size() - 2].a_val = argv_array_base; 10157073Sgblack@eecs.umich.edu assert(auxv[auxv.size() - 1].a_type == M5_AT_PLATFORM); 10167073Sgblack@eecs.umich.edu auxv[auxv.size() - 1].a_val = aux_data_base + numRandomBytes; 10174793Sgblack@eecs.umich.edu 101811906SBrandon.Potter@amd.com 101911906SBrandon.Potter@amd.com // Copy the aux stuff 102010590Sgabeblack@google.com for (int x = 0; x < auxv.size(); x++) { 10218852Sandreas.hansson@arm.com initVirtMem.writeBlob(auxv_array_base + x * 2 * intSize, 10224166Sgblack@eecs.umich.edu (uint8_t*)&(auxv[x].a_type), intSize); 10238852Sandreas.hansson@arm.com initVirtMem.writeBlob(auxv_array_base + (x * 2 + 1) * intSize, 10244166Sgblack@eecs.umich.edu (uint8_t*)&(auxv[x].a_val), intSize); 10254166Sgblack@eecs.umich.edu } 102611906SBrandon.Potter@amd.com // Write out the terminating zeroed auxiliary vector 10274166Sgblack@eecs.umich.edu const uint64_t zero = 0; 102811326Ssteve.reinhardt@amd.com initVirtMem.writeBlob(auxv_array_base + auxv.size() * 2 * intSize, 102911326Ssteve.reinhardt@amd.com (uint8_t*)&zero, intSize); 103011326Ssteve.reinhardt@amd.com initVirtMem.writeBlob(auxv_array_base + (auxv.size() * 2 + 1) * intSize, 103111326Ssteve.reinhardt@amd.com (uint8_t*)&zero, intSize); 10324166Sgblack@eecs.umich.edu 10338852Sandreas.hansson@arm.com initVirtMem.writeString(aux_data_base, platform.c_str()); 10344793Sgblack@eecs.umich.edu 10354166Sgblack@eecs.umich.edu copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); 10364166Sgblack@eecs.umich.edu copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); 10374166Sgblack@eecs.umich.edu 10388852Sandreas.hansson@arm.com initVirtMem.writeBlob(argc_base, (uint8_t*)&guestArgc, intSize); 10394166Sgblack@eecs.umich.edu 10405713Shsul@eecs.umich.edu ThreadContext *tc = system->getThreadContext(contextIds[0]); 104111906SBrandon.Potter@amd.com // Set the stack pointer register 104211905SBrandon.Potter@amd.com tc->setIntReg(StackPointerReg, stack_min); 10434166Sgblack@eecs.umich.edu 10445246Sgblack@eecs.umich.edu // There doesn't need to be any segment base added in since we're dealing 10455246Sgblack@eecs.umich.edu // with the flat segmentation model. 104611389Sbrandon.potter@amd.com tc->pcState(getStartPC()); 10474166Sgblack@eecs.umich.edu 104811906SBrandon.Potter@amd.com // Align the "stack_min" to a page boundary. 104911905SBrandon.Potter@amd.com memState->setStackMin(roundDown(stack_min, pageSize)); 10504166Sgblack@eecs.umich.edu} 10515956Sgblack@eecs.umich.edu 10525956Sgblack@eecs.umich.eduvoid 105311884Sbrandon.potter@amd.comX86_64Process::argsInit(int pageSize) 10545956Sgblack@eecs.umich.edu{ 10555973Sgblack@eecs.umich.edu std::vector<AuxVector<uint64_t> > extraAuxvs; 10567073Sgblack@eecs.umich.edu extraAuxvs.push_back(AuxVector<uint64_t>(M5_AT_SYSINFO_EHDR, 10577073Sgblack@eecs.umich.edu vsyscallPage.base)); 105811851Sbrandon.potter@amd.com X86Process::argsInit<uint64_t>(pageSize, extraAuxvs); 10595956Sgblack@eecs.umich.edu} 10605956Sgblack@eecs.umich.edu 10615956Sgblack@eecs.umich.eduvoid 106211884Sbrandon.potter@amd.comI386Process::argsInit(int pageSize) 10635956Sgblack@eecs.umich.edu{ 10645973Sgblack@eecs.umich.edu std::vector<AuxVector<uint32_t> > extraAuxvs; 10655973Sgblack@eecs.umich.edu //Tell the binary where the vsyscall part of the vsyscall page is. 10667073Sgblack@eecs.umich.edu extraAuxvs.push_back(AuxVector<uint32_t>(M5_AT_SYSINFO, 10675973Sgblack@eecs.umich.edu vsyscallPage.base + vsyscallPage.vsyscallOffset)); 10687073Sgblack@eecs.umich.edu extraAuxvs.push_back(AuxVector<uint32_t>(M5_AT_SYSINFO_EHDR, 10697073Sgblack@eecs.umich.edu vsyscallPage.base)); 107011851Sbrandon.potter@amd.com X86Process::argsInit<uint32_t>(pageSize, extraAuxvs); 10715956Sgblack@eecs.umich.edu} 10725958Sgblack@eecs.umich.edu 10735958Sgblack@eecs.umich.eduvoid 107411851Sbrandon.potter@amd.comX86Process::setSyscallReturn(ThreadContext *tc, SyscallReturn retval) 10755958Sgblack@eecs.umich.edu{ 107610223Ssteve.reinhardt@amd.com tc->setIntReg(INTREG_RAX, retval.encodedValue()); 10775958Sgblack@eecs.umich.edu} 10785958Sgblack@eecs.umich.edu 10795958Sgblack@eecs.umich.eduX86ISA::IntReg 108011851Sbrandon.potter@amd.comX86_64Process::getSyscallArg(ThreadContext *tc, int &i) 10815958Sgblack@eecs.umich.edu{ 10825958Sgblack@eecs.umich.edu assert(i < NumArgumentRegs); 10836701Sgblack@eecs.umich.edu return tc->readIntReg(ArgumentReg[i++]); 10845958Sgblack@eecs.umich.edu} 10855958Sgblack@eecs.umich.edu 10865958Sgblack@eecs.umich.eduvoid 108711851Sbrandon.potter@amd.comX86_64Process::setSyscallArg(ThreadContext *tc, int i, X86ISA::IntReg val) 10885958Sgblack@eecs.umich.edu{ 10895958Sgblack@eecs.umich.edu assert(i < NumArgumentRegs); 10905958Sgblack@eecs.umich.edu return tc->setIntReg(ArgumentReg[i], val); 10915958Sgblack@eecs.umich.edu} 10925958Sgblack@eecs.umich.edu 109311886Sbrandon.potter@amd.comvoid 109411886Sbrandon.potter@amd.comX86_64Process::clone(ThreadContext *old_tc, ThreadContext *new_tc, 109511886Sbrandon.potter@amd.com Process *p, TheISA::IntReg flags) 109611886Sbrandon.potter@amd.com{ 109711886Sbrandon.potter@amd.com X86Process::clone(old_tc, new_tc, p, flags); 109811886Sbrandon.potter@amd.com ((X86_64Process*)p)->vsyscallPage = vsyscallPage; 109911886Sbrandon.potter@amd.com} 110011886Sbrandon.potter@amd.com 11015958Sgblack@eecs.umich.eduX86ISA::IntReg 110211851Sbrandon.potter@amd.comI386Process::getSyscallArg(ThreadContext *tc, int &i) 11035958Sgblack@eecs.umich.edu{ 11045959Sgblack@eecs.umich.edu assert(i < NumArgumentRegs32); 11056701Sgblack@eecs.umich.edu return tc->readIntReg(ArgumentReg32[i++]); 11066701Sgblack@eecs.umich.edu} 11076701Sgblack@eecs.umich.edu 11086701Sgblack@eecs.umich.eduX86ISA::IntReg 110911851Sbrandon.potter@amd.comI386Process::getSyscallArg(ThreadContext *tc, int &i, int width) 11106701Sgblack@eecs.umich.edu{ 11116701Sgblack@eecs.umich.edu assert(width == 32 || width == 64); 11126701Sgblack@eecs.umich.edu assert(i < NumArgumentRegs); 11136701Sgblack@eecs.umich.edu uint64_t retVal = tc->readIntReg(ArgumentReg32[i++]) & mask(32); 11146701Sgblack@eecs.umich.edu if (width == 64) 11156701Sgblack@eecs.umich.edu retVal |= ((uint64_t)tc->readIntReg(ArgumentReg[i++]) << 32); 11166701Sgblack@eecs.umich.edu return retVal; 11175958Sgblack@eecs.umich.edu} 11185958Sgblack@eecs.umich.edu 11195958Sgblack@eecs.umich.eduvoid 112011851Sbrandon.potter@amd.comI386Process::setSyscallArg(ThreadContext *tc, int i, X86ISA::IntReg val) 11215958Sgblack@eecs.umich.edu{ 11225959Sgblack@eecs.umich.edu assert(i < NumArgumentRegs); 11235959Sgblack@eecs.umich.edu return tc->setIntReg(ArgumentReg[i], val); 11245958Sgblack@eecs.umich.edu} 112511886Sbrandon.potter@amd.com 112611886Sbrandon.potter@amd.comvoid 112711886Sbrandon.potter@amd.comI386Process::clone(ThreadContext *old_tc, ThreadContext *new_tc, 112811886Sbrandon.potter@amd.com Process *p, TheISA::IntReg flags) 112911886Sbrandon.potter@amd.com{ 113011886Sbrandon.potter@amd.com X86Process::clone(old_tc, new_tc, p, flags); 113111886Sbrandon.potter@amd.com ((I386Process*)p)->vsyscallPage = vsyscallPage; 113211886Sbrandon.potter@amd.com} 1133