| /* |
| * Copyright (c) 2003-2006 The Regents of The University of Michigan |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer; |
| * redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution; |
| * neither the name of the copyright holders nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| * Authors: Gabe Black |
| * Ali Saidi |
| */ |
| |
| /* |
| * Copyright (c) 2007 The Hewlett-Packard Development Company |
| * All rights reserved. |
| * |
| * Redistribution and use of this software in source and binary forms, |
| * with or without modification, are permitted provided that the |
| * following conditions are met: |
| * |
| * The software must be used only for Non-Commercial Use which means any |
| * use which is NOT directed to receiving any direct monetary |
| * compensation for, or commercial advantage from such use. Illustrative |
| * examples of non-commercial use are academic research, personal study, |
| * teaching, education and corporate research & development. |
| * Illustrative examples of commercial use are distributing products for |
| * commercial advantage and providing services using the software for |
| * commercial advantage. |
| * |
| * If you wish to use this software or functionality therein that may be |
| * covered by patents for commercial use, please contact: |
| * Director of Intellectual Property Licensing |
| * Office of Strategy and Technology |
| * Hewlett-Packard Company |
| * 1501 Page Mill Road |
| * Palo Alto, California 94304 |
| * |
| * Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. Redistributions |
| * in binary form must reproduce the above copyright notice, this list of |
| * conditions and the following disclaimer in the documentation and/or |
| * other materials provided with the distribution. Neither the name of |
| * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. No right of |
| * sublicense is granted herewith. Derivatives of the software and |
| * output created using the software may be prepared, but only for |
| * Non-Commercial Uses. Derivatives of the software may be shared with |
| * others provided: (i) the others agree to abide by the list of |
| * conditions herein which includes the Non-Commercial Use restrictions; |
| * and (ii) such Derivatives of the software include the above copyright |
| * notice to acknowledge the contribution from this software where |
| * applicable, this list of conditions and the disclaimer below. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| * Authors: Gabe Black |
| */ |
| |
| #include "arch/x86/isa_traits.hh" |
| #include "arch/x86/process.hh" |
| #include "arch/x86/segmentregs.hh" |
| #include "arch/x86/types.hh" |
| #include "base/loader/object_file.hh" |
| #include "base/loader/elf_object.hh" |
| #include "base/misc.hh" |
| #include "base/trace.hh" |
| #include "cpu/thread_context.hh" |
| #include "mem/page_table.hh" |
| #include "mem/translating_port.hh" |
| #include "sim/process_impl.hh" |
| #include "sim/system.hh" |
| |
| using namespace std; |
| using namespace X86ISA; |
| |
| M5_64_auxv_t::M5_64_auxv_t(int64_t type, int64_t val) |
| { |
| a_type = TheISA::htog(type); |
| a_val = TheISA::htog(val); |
| } |
| |
| X86LiveProcess::X86LiveProcess(LiveProcessParams * params, |
| ObjectFile *objFile) |
| : LiveProcess(params, objFile) |
| { |
| brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize(); |
| brk_point = roundUp(brk_point, VMPageSize); |
| |
| // Set pointer for next thread stack. Reserve 8M for main stack. |
| next_thread_stack_base = stack_base - (8 * 1024 * 1024); |
| |
| // Set up stack. On X86_64 Linux, stack goes from the top of memory |
| // downward, less the hole for the kernel address space plus one page |
| // for undertermined purposes. |
| stack_base = (Addr)0x7FFFFFFFF000ULL; |
| |
| // Set up region for mmaps. This was determined empirically and may not |
| // always be correct. |
| mmap_start = mmap_end = (Addr)0x2aaaaaaab000ULL; |
| } |
| |
| void X86LiveProcess::handleTrap(int trapNum, ThreadContext *tc) |
| { |
| switch(trapNum) |
| { |
| default: |
| panic("Unimplemented trap to operating system: trap number %#x.\n", trapNum); |
| } |
| } |
| |
| void |
| X86LiveProcess::startup() |
| { |
| if (checkpointRestored) |
| return; |
| |
| argsInit(sizeof(IntReg), VMPageSize); |
| |
| for (int i = 0; i < threadContexts.size(); i++) { |
| ThreadContext * tc = threadContexts[i]; |
| |
| SegAttr dataAttr = 0; |
| dataAttr.writable = 1; |
| dataAttr.readable = 1; |
| dataAttr.expandDown = 0; |
| dataAttr.dpl = 3; |
| dataAttr.defaultSize = 0; |
| dataAttr.longMode = 1; |
| |
| //Initialize the segment registers. |
| for(int seg = 0; seg < NUM_SEGMENTREGS; seg++) { |
| tc->setMiscRegNoEffect(MISCREG_SEG_BASE(seg), 0); |
| tc->setMiscRegNoEffect(MISCREG_SEG_EFF_BASE(seg), 0); |
| tc->setMiscRegNoEffect(MISCREG_SEG_ATTR(seg), dataAttr); |
| } |
| |
| SegAttr csAttr = 0; |
| csAttr.writable = 0; |
| csAttr.readable = 1; |
| csAttr.expandDown = 0; |
| csAttr.dpl = 3; |
| csAttr.defaultSize = 0; |
| csAttr.longMode = 1; |
| |
| tc->setMiscRegNoEffect(MISCREG_CS_ATTR, csAttr); |
| |
| //Set up the registers that describe the operating mode. |
| CR0 cr0 = 0; |
| cr0.pg = 1; // Turn on paging. |
| cr0.cd = 0; // Don't disable caching. |
| cr0.nw = 0; // This is bit is defined to be ignored. |
| cr0.am = 0; // No alignment checking |
| cr0.wp = 0; // Supervisor mode can write read only pages |
| cr0.ne = 1; |
| cr0.et = 1; // This should always be 1 |
| cr0.ts = 0; // We don't do task switching, so causing fp exceptions |
| // would be pointless. |
| cr0.em = 0; // Allow x87 instructions to execute natively. |
| cr0.mp = 1; // This doesn't really matter, but the manual suggests |
| // setting it to one. |
| cr0.pe = 1; // We're definitely in protected mode. |
| tc->setMiscReg(MISCREG_CR0, cr0); |
| |
| Efer efer = 0; |
| efer.sce = 1; // Enable system call extensions. |
| efer.lme = 1; // Enable long mode. |
| efer.lma = 1; // Activate long mode. |
| efer.nxe = 1; // Enable nx support. |
| efer.svme = 0; // Disable svm support for now. It isn't implemented. |
| efer.ffxsr = 1; // Turn on fast fxsave and fxrstor. |
| tc->setMiscReg(MISCREG_EFER, efer); |
| } |
| } |
| |
| void |
| X86LiveProcess::argsInit(int intSize, int pageSize) |
| { |
| typedef M5_64_auxv_t auxv_t; |
| Process::startup(); |
| |
| string filename; |
| if(argv.size() < 1) |
| filename = ""; |
| else |
| filename = argv[0]; |
| |
| //We want 16 byte alignment |
| uint64_t align = 16; |
| |
| // load object file into target memory |
| objFile->loadSections(initVirtMem); |
| |
| enum X86CpuFeature { |
| X86_OnboardFPU = 1 << 0, |
| X86_VirtualModeExtensions = 1 << 1, |
| X86_DebuggingExtensions = 1 << 2, |
| X86_PageSizeExtensions = 1 << 3, |
| |
| X86_TimeStampCounter = 1 << 4, |
| X86_ModelSpecificRegisters = 1 << 5, |
| X86_PhysicalAddressExtensions = 1 << 6, |
| X86_MachineCheckExtensions = 1 << 7, |
| |
| X86_CMPXCHG8Instruction = 1 << 8, |
| X86_OnboardAPIC = 1 << 9, |
| X86_SYSENTER_SYSEXIT = 1 << 11, |
| |
| X86_MemoryTypeRangeRegisters = 1 << 12, |
| X86_PageGlobalEnable = 1 << 13, |
| X86_MachineCheckArchitecture = 1 << 14, |
| X86_CMOVInstruction = 1 << 15, |
| |
| X86_PageAttributeTable = 1 << 16, |
| X86_36BitPSEs = 1 << 17, |
| X86_ProcessorSerialNumber = 1 << 18, |
| X86_CLFLUSHInstruction = 1 << 19, |
| |
| X86_DebugTraceStore = 1 << 21, |
| X86_ACPIViaMSR = 1 << 22, |
| X86_MultimediaExtensions = 1 << 23, |
| |
| X86_FXSAVE_FXRSTOR = 1 << 24, |
| X86_StreamingSIMDExtensions = 1 << 25, |
| X86_StreamingSIMDExtensions2 = 1 << 26, |
| X86_CPUSelfSnoop = 1 << 27, |
| |
| X86_HyperThreading = 1 << 28, |
| X86_AutomaticClockControl = 1 << 29, |
| X86_IA64Processor = 1 << 30 |
| }; |
| |
| //Setup the auxilliary vectors. These will already have endian conversion. |
| //Auxilliary vectors are loaded only for elf formatted executables. |
| ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile); |
| if(elfObject) |
| { |
| uint64_t features = |
| X86_OnboardFPU | |
| X86_VirtualModeExtensions | |
| X86_DebuggingExtensions | |
| X86_PageSizeExtensions | |
| X86_TimeStampCounter | |
| X86_ModelSpecificRegisters | |
| X86_PhysicalAddressExtensions | |
| X86_MachineCheckExtensions | |
| X86_CMPXCHG8Instruction | |
| X86_OnboardAPIC | |
| X86_SYSENTER_SYSEXIT | |
| X86_MemoryTypeRangeRegisters | |
| X86_PageGlobalEnable | |
| X86_MachineCheckArchitecture | |
| X86_CMOVInstruction | |
| X86_PageAttributeTable | |
| X86_36BitPSEs | |
| // X86_ProcessorSerialNumber | |
| X86_CLFLUSHInstruction | |
| // X86_DebugTraceStore | |
| // X86_ACPIViaMSR | |
| X86_MultimediaExtensions | |
| X86_FXSAVE_FXRSTOR | |
| X86_StreamingSIMDExtensions | |
| X86_StreamingSIMDExtensions2 | |
| // X86_CPUSelfSnoop | |
| // X86_HyperThreading | |
| // X86_AutomaticClockControl | |
| // X86_IA64Processor | |
| 0; |
| |
| //Bits which describe the system hardware capabilities |
| //XXX Figure out what these should be |
| auxv.push_back(auxv_t(M5_AT_HWCAP, features)); |
| //The system page size |
| auxv.push_back(auxv_t(M5_AT_PAGESZ, X86ISA::VMPageSize)); |
| //Frequency at which times() increments |
| auxv.push_back(auxv_t(M5_AT_CLKTCK, 100)); |
| // For statically linked executables, this is the virtual address of the |
| // program header tables if they appear in the executable image |
| auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable())); |
| // This is the size of a program header entry from the elf file. |
| auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize())); |
| // This is the number of program headers from the original elf file. |
| auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount())); |
| //Defined to be 100 in the kernel source. |
| //This is the address of the elf "interpreter", It should be set |
| //to 0 for regular executables. It should be something else |
| //(not sure what) for dynamic libraries. |
| auxv.push_back(auxv_t(M5_AT_BASE, 0)); |
| |
| //XXX Figure out what this should be. |
| auxv.push_back(auxv_t(M5_AT_FLAGS, 0)); |
| //The entry point to the program |
| auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint())); |
| //Different user and group IDs |
| auxv.push_back(auxv_t(M5_AT_UID, uid())); |
| auxv.push_back(auxv_t(M5_AT_EUID, euid())); |
| auxv.push_back(auxv_t(M5_AT_GID, gid())); |
| auxv.push_back(auxv_t(M5_AT_EGID, egid())); |
| //Whether to enable "secure mode" in the executable |
| auxv.push_back(auxv_t(M5_AT_SECURE, 0)); |
| //The string "x86_64" with unknown meaning |
| auxv.push_back(auxv_t(M5_AT_PLATFORM, 0)); |
| } |
| |
| //Figure out how big the initial stack needs to be |
| |
| // A sentry NULL void pointer at the top of the stack. |
| int sentry_size = intSize; |
| |
| //This is the name of the file which is present on the initial stack |
| //It's purpose is to let the user space linker examine the original file. |
| int file_name_size = filename.size() + 1; |
| |
| string platform = "x86_64"; |
| int aux_data_size = platform.size() + 1; |
| |
| int env_data_size = 0; |
| for (int i = 0; i < envp.size(); ++i) { |
| env_data_size += envp[i].size() + 1; |
| } |
| int arg_data_size = 0; |
| for (int i = 0; i < argv.size(); ++i) { |
| arg_data_size += argv[i].size() + 1; |
| } |
| |
| //The info_block needs to be padded so it's size is a multiple of the |
| //alignment mask. Also, it appears that there needs to be at least some |
| //padding, so if the size is already a multiple, we need to increase it |
| //anyway. |
| int base_info_block_size = |
| sentry_size + file_name_size + env_data_size + arg_data_size; |
| |
| int info_block_size = roundUp(base_info_block_size, align); |
| |
| int info_block_padding = info_block_size - base_info_block_size; |
| |
| //Each auxilliary vector is two 8 byte words |
| int aux_array_size = intSize * 2 * (auxv.size() + 1); |
| |
| int envp_array_size = intSize * (envp.size() + 1); |
| int argv_array_size = intSize * (argv.size() + 1); |
| |
| int argc_size = intSize; |
| |
| //Figure out the size of the contents of the actual initial frame |
| int frame_size = |
| aux_array_size + |
| envp_array_size + |
| argv_array_size + |
| argc_size; |
| |
| //There needs to be padding after the auxiliary vector data so that the |
| //very bottom of the stack is aligned properly. |
| int partial_size = frame_size + aux_data_size; |
| int aligned_partial_size = roundUp(partial_size, align); |
| int aux_padding = aligned_partial_size - partial_size; |
| |
| int space_needed = |
| info_block_size + |
| aux_data_size + |
| aux_padding + |
| frame_size; |
| |
| stack_min = stack_base - space_needed; |
| stack_min = roundDown(stack_min, align); |
| stack_size = stack_base - stack_min; |
| |
| // map memory |
| pTable->allocate(roundDown(stack_min, pageSize), |
| roundUp(stack_size, pageSize)); |
| |
| // map out initial stack contents |
| Addr sentry_base = stack_base - sentry_size; |
| Addr file_name_base = sentry_base - file_name_size; |
| Addr env_data_base = file_name_base - env_data_size; |
| Addr arg_data_base = env_data_base - arg_data_size; |
| Addr aux_data_base = arg_data_base - info_block_padding - aux_data_size; |
| Addr auxv_array_base = aux_data_base - aux_array_size - aux_padding; |
| Addr envp_array_base = auxv_array_base - envp_array_size; |
| Addr argv_array_base = envp_array_base - argv_array_size; |
| Addr argc_base = argv_array_base - argc_size; |
| |
| DPRINTF(X86, "The addresses of items on the initial stack:\n"); |
| DPRINTF(X86, "0x%x - file name\n", file_name_base); |
| DPRINTF(X86, "0x%x - env data\n", env_data_base); |
| DPRINTF(X86, "0x%x - arg data\n", arg_data_base); |
| DPRINTF(X86, "0x%x - aux data\n", aux_data_base); |
| DPRINTF(X86, "0x%x - auxv array\n", auxv_array_base); |
| DPRINTF(X86, "0x%x - envp array\n", envp_array_base); |
| DPRINTF(X86, "0x%x - argv array\n", argv_array_base); |
| DPRINTF(X86, "0x%x - argc \n", argc_base); |
| DPRINTF(X86, "0x%x - stack min\n", stack_min); |
| |
| // write contents to stack |
| |
| // figure out argc |
| uint64_t argc = argv.size(); |
| uint64_t guestArgc = TheISA::htog(argc); |
| |
| //Write out the sentry void * |
| uint64_t sentry_NULL = 0; |
| initVirtMem->writeBlob(sentry_base, |
| (uint8_t*)&sentry_NULL, sentry_size); |
| |
| //Write the file name |
| initVirtMem->writeString(file_name_base, filename.c_str()); |
| |
| //Fix up the aux vector which points to the "platform" string |
| assert(auxv[auxv.size() - 1].a_type = M5_AT_PLATFORM); |
| auxv[auxv.size() - 1].a_val = aux_data_base; |
| |
| //Copy the aux stuff |
| for(int x = 0; x < auxv.size(); x++) |
| { |
| initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize, |
| (uint8_t*)&(auxv[x].a_type), intSize); |
| initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize, |
| (uint8_t*)&(auxv[x].a_val), intSize); |
| } |
| //Write out the terminating zeroed auxilliary vector |
| const uint64_t zero = 0; |
| initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(), |
| (uint8_t*)&zero, 2 * intSize); |
| |
| initVirtMem->writeString(aux_data_base, platform.c_str()); |
| |
| copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); |
| copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); |
| |
| initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize); |
| |
| //Set the stack pointer register |
| threadContexts[0]->setIntReg(StackPointerReg, stack_min); |
| |
| Addr prog_entry = objFile->entryPoint(); |
| // There doesn't need to be any segment base added in since we're dealing |
| // with the flat segmentation model. |
| threadContexts[0]->setPC(prog_entry); |
| threadContexts[0]->setNextPC(prog_entry + sizeof(MachInst)); |
| |
| //Align the "stack_min" to a page boundary. |
| stack_min = roundDown(stack_min, pageSize); |
| |
| // num_processes++; |
| } |