4b29d22386
R11 is just junk after the start of exectuion because we're "returning" from an execve call and linux destroys the contents of rcx and r11 on system calls. --HG-- extra : convert_revision : 6bf69a50ce56e0355dfdd41524163874340beec0
426 lines
16 KiB
C++
426 lines
16 KiB
C++
/*
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* Copyright (c) 2003-2006 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Gabe Black
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* Ali Saidi
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*/
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/*
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* Copyright (c) 2007 The Hewlett-Packard Development Company
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* All rights reserved.
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*
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* Redistribution and use of this software in source and binary forms,
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* with or without modification, are permitted provided that the
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* following conditions are met:
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*
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* The software must be used only for Non-Commercial Use which means any
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* use which is NOT directed to receiving any direct monetary
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* compensation for, or commercial advantage from such use. Illustrative
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* examples of non-commercial use are academic research, personal study,
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* teaching, education and corporate research & development.
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* Illustrative examples of commercial use are distributing products for
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* commercial advantage and providing services using the software for
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* commercial advantage.
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*
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* If you wish to use this software or functionality therein that may be
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* covered by patents for commercial use, please contact:
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* Director of Intellectual Property Licensing
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* Office of Strategy and Technology
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* Hewlett-Packard Company
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* 1501 Page Mill Road
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* Palo Alto, California 94304
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer. Redistributions
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* in binary form must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution. Neither the name of
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* the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission. No right of
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* sublicense is granted herewith. Derivatives of the software and
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* output created using the software may be prepared, but only for
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* Non-Commercial Uses. Derivatives of the software may be shared with
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* others provided: (i) the others agree to abide by the list of
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* conditions herein which includes the Non-Commercial Use restrictions;
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* and (ii) such Derivatives of the software include the above copyright
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* notice to acknowledge the contribution from this software where
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* applicable, this list of conditions and the disclaimer below.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Gabe Black
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*/
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#include "arch/x86/isa_traits.hh"
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#include "arch/x86/process.hh"
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#include "arch/x86/types.hh"
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#include "base/loader/object_file.hh"
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#include "base/loader/elf_object.hh"
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#include "base/misc.hh"
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#include "cpu/thread_context.hh"
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#include "mem/page_table.hh"
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#include "mem/translating_port.hh"
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#include "sim/process_impl.hh"
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#include "sim/system.hh"
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using namespace std;
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using namespace X86ISA;
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M5_64_auxv_t::M5_64_auxv_t(int64_t type, int64_t val)
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{
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a_type = TheISA::htog(type);
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a_val = TheISA::htog(val);
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}
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X86LiveProcess::X86LiveProcess(const std::string &nm, ObjectFile *objFile,
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System *_system, int stdin_fd, int stdout_fd, int stderr_fd,
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std::vector<std::string> &argv, std::vector<std::string> &envp,
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const std::string &cwd,
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uint64_t _uid, uint64_t _euid, uint64_t _gid, uint64_t _egid,
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uint64_t _pid, uint64_t _ppid)
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: LiveProcess(nm, objFile, _system, stdin_fd, stdout_fd, stderr_fd,
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argv, envp, cwd, _uid, _euid, _gid, _egid, _pid, _ppid)
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{
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brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize();
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brk_point = roundUp(brk_point, VMPageSize);
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// Set pointer for next thread stack. Reserve 8M for main stack.
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next_thread_stack_base = stack_base - (8 * 1024 * 1024);
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// Set up stack. On X86_64 Linux, stack goes from the top of memory
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// downward, less the hole for the kernel address space plus one page
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// for undertermined purposes.
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stack_base = (Addr)0x7FFFFFFFF000ULL;
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// Set up region for mmaps. This was determined empirically and may not
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// always be correct.
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mmap_start = mmap_end = 0x2aaaaaaab000;
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}
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void X86LiveProcess::handleTrap(int trapNum, ThreadContext *tc)
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{
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switch(trapNum)
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{
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default:
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panic("Unimplemented trap to operating system: trap number %#x.\n", trapNum);
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}
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}
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void
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X86LiveProcess::startup()
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{
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argsInit(sizeof(IntReg), VMPageSize);
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//The AMD64 abi says that only rsp and rdx are defined at process
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//startup. rsp will be set by argsInit, and I don't understand what
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//rdx should be set to. The other floating point and integer registers
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//will be zeroed by the register file constructors, but control registers
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//should be initialized here. Since none of those are implemented, there
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//isn't anything here.
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}
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void
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X86LiveProcess::argsInit(int intSize, int pageSize)
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{
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typedef M5_64_auxv_t auxv_t;
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Process::startup();
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string filename;
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if(argv.size() < 1)
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filename = "";
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else
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filename = argv[0];
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//We want 16 byte alignment
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Addr alignmentMask = ~mask(4);
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// load object file into target memory
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objFile->loadSections(initVirtMem);
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enum X86CpuFeature {
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X86_OnboardFPU = 1 << 0,
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X86_VirtualModeExtensions = 1 << 1,
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X86_DebuggingExtensions = 1 << 2,
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X86_PageSizeExtensions = 1 << 3,
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X86_TimeStampCounter = 1 << 4,
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X86_ModelSpecificRegisters = 1 << 5,
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X86_PhysicalAddressExtensions = 1 << 6,
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X86_MachineCheckExtensions = 1 << 7,
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X86_CMPXCHG8Instruction = 1 << 8,
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X86_OnboardAPIC = 1 << 9,
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X86_SYSENTER_SYSEXIT = 1 << 11,
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X86_MemoryTypeRangeRegisters = 1 << 12,
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X86_PageGlobalEnable = 1 << 13,
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X86_MachineCheckArchitecture = 1 << 14,
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X86_CMOVInstruction = 1 << 15,
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X86_PageAttributeTable = 1 << 16,
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X86_36BitPSEs = 1 << 17,
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X86_ProcessorSerialNumber = 1 << 18,
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X86_CLFLUSHInstruction = 1 << 19,
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X86_DebugTraceStore = 1 << 21,
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X86_ACPIViaMSR = 1 << 22,
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X86_MultimediaExtensions = 1 << 23,
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X86_FXSAVE_FXRSTOR = 1 << 24,
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X86_StreamingSIMDExtensions = 1 << 25,
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X86_StreamingSIMDExtensions2 = 1 << 26,
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X86_CPUSelfSnoop = 1 << 27,
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X86_HyperThreading = 1 << 28,
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X86_AutomaticClockControl = 1 << 29,
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X86_IA64Processor = 1 << 30
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};
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//Setup the auxilliary vectors. These will already have endian conversion.
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//Auxilliary vectors are loaded only for elf formatted executables.
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ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile);
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if(elfObject)
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{
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uint64_t features =
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X86_OnboardFPU |
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X86_VirtualModeExtensions |
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X86_DebuggingExtensions |
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X86_PageSizeExtensions |
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X86_TimeStampCounter |
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X86_ModelSpecificRegisters |
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X86_PhysicalAddressExtensions |
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X86_MachineCheckExtensions |
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X86_CMPXCHG8Instruction |
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X86_OnboardAPIC |
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X86_SYSENTER_SYSEXIT |
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X86_MemoryTypeRangeRegisters |
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X86_PageGlobalEnable |
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X86_MachineCheckArchitecture |
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X86_CMOVInstruction |
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X86_PageAttributeTable |
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X86_36BitPSEs |
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// X86_ProcessorSerialNumber |
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X86_CLFLUSHInstruction |
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// X86_DebugTraceStore |
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// X86_ACPIViaMSR |
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X86_MultimediaExtensions |
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X86_FXSAVE_FXRSTOR |
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X86_StreamingSIMDExtensions |
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X86_StreamingSIMDExtensions2 |
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// X86_CPUSelfSnoop |
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// X86_HyperThreading |
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// X86_AutomaticClockControl |
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// X86_IA64Processor |
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0;
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//Bits which describe the system hardware capabilities
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//XXX Figure out what these should be
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auxv.push_back(auxv_t(M5_AT_HWCAP, features));
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//The system page size
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auxv.push_back(auxv_t(M5_AT_PAGESZ, X86ISA::VMPageSize));
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//Frequency at which times() increments
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auxv.push_back(auxv_t(M5_AT_CLKTCK, 100));
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// For statically linked executables, this is the virtual address of the
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// program header tables if they appear in the executable image
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auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable()));
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// This is the size of a program header entry from the elf file.
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auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize()));
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// This is the number of program headers from the original elf file.
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auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount()));
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//Defined to be 100 in the kernel source.
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//This is the address of the elf "interpreter", It should be set
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//to 0 for regular executables. It should be something else
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//(not sure what) for dynamic libraries.
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auxv.push_back(auxv_t(M5_AT_BASE, 0));
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//XXX Figure out what this should be.
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auxv.push_back(auxv_t(M5_AT_FLAGS, 0));
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//The entry point to the program
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auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint()));
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//Different user and group IDs
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auxv.push_back(auxv_t(M5_AT_UID, uid()));
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auxv.push_back(auxv_t(M5_AT_EUID, euid()));
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auxv.push_back(auxv_t(M5_AT_GID, gid()));
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auxv.push_back(auxv_t(M5_AT_EGID, egid()));
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//Whether to enable "secure mode" in the executable
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auxv.push_back(auxv_t(M5_AT_SECURE, 0));
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//The string "x86_64" with unknown meaning
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auxv.push_back(auxv_t(M5_AT_PLATFORM, 0));
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}
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//Figure out how big the initial stack needs to be
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// The unaccounted for 0 at the top of the stack
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int mysterious_size = intSize;
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//This is the name of the file which is present on the initial stack
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//It's purpose is to let the user space linker examine the original file.
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int file_name_size = filename.size();
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string platform = "x86_64";
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int aux_data_size = platform.size() + 1;
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int env_data_size = 0;
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for (int i = 0; i < envp.size(); ++i) {
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env_data_size += envp[i].size();
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}
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int arg_data_size = 0;
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for (int i = 0; i < argv.size(); ++i) {
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arg_data_size += argv[i].size();
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}
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//The auxiliary vector data needs to be padded so it's size is a multiple
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//of the alignment mask.
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int aux_padding =
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((aux_data_size + ~alignmentMask) & alignmentMask) - aux_data_size;
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//The info_block needs to be padded so it's size is a multiple of the
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//alignment mask. Also, it appears that there needs to be at least some
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//padding, so if the size is already a multiple, we need to increase it
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//anyway.
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int info_block_size =
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(mysterious_size +
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file_name_size +
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env_data_size +
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arg_data_size +
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~alignmentMask) & alignmentMask;
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int info_block_padding =
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info_block_size -
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mysterious_size -
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file_name_size -
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env_data_size -
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arg_data_size;
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//Each auxilliary vector is two 8 byte words
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int aux_array_size = intSize * 2 * (auxv.size() + 1);
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int envp_array_size = intSize * (envp.size() + 1);
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int argv_array_size = intSize * (argv.size() + 1);
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int argc_size = intSize;
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int space_needed =
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info_block_size +
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aux_data_size +
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aux_padding +
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aux_array_size +
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envp_array_size +
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argv_array_size +
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argc_size;
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stack_min = stack_base - space_needed;
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stack_min &= alignmentMask;
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stack_size = stack_base - stack_min;
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// map memory
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pTable->allocate(roundDown(stack_min, pageSize),
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roundUp(stack_size, pageSize));
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// map out initial stack contents
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Addr mysterious_base = stack_base - mysterious_size;
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Addr file_name_base = mysterious_base - file_name_size;
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Addr env_data_base = file_name_base - env_data_size;
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Addr arg_data_base = env_data_base - arg_data_size;
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Addr aux_data_base = arg_data_base - aux_data_size - info_block_padding;
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Addr auxv_array_base = aux_data_base - aux_array_size - aux_padding;
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Addr envp_array_base = auxv_array_base - envp_array_size;
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Addr argv_array_base = envp_array_base - argv_array_size;
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Addr argc_base = argv_array_base - argc_size;
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DPRINTF(X86, "The addresses of items on the initial stack:\n");
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DPRINTF(X86, "0x%x - file name\n", file_name_base);
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DPRINTF(X86, "0x%x - env data\n", env_data_base);
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DPRINTF(X86, "0x%x - arg data\n", arg_data_base);
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DPRINTF(X86, "0x%x - aux data\n", aux_data_base);
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DPRINTF(X86, "0x%x - auxv array\n", auxv_array_base);
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DPRINTF(X86, "0x%x - envp array\n", envp_array_base);
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DPRINTF(X86, "0x%x - argv array\n", argv_array_base);
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DPRINTF(X86, "0x%x - argc \n", argc_base);
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DPRINTF(X86, "0x%x - stack min\n", stack_min);
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// write contents to stack
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// figure out argc
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uint64_t argc = argv.size();
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uint64_t guestArgc = TheISA::htog(argc);
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//Write out the mysterious 0
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uint64_t mysterious_zero = 0;
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initVirtMem->writeBlob(mysterious_base,
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(uint8_t*)&mysterious_zero, mysterious_size);
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//Write the file name
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initVirtMem->writeString(file_name_base, filename.c_str());
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//Fix up the aux vector which points to the "platform" string
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assert(auxv[auxv.size() - 1].a_type = M5_AT_PLATFORM);
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auxv[auxv.size() - 1].a_val = aux_data_base;
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//Copy the aux stuff
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for(int x = 0; x < auxv.size(); x++)
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{
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initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize,
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(uint8_t*)&(auxv[x].a_type), intSize);
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initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize,
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(uint8_t*)&(auxv[x].a_val), intSize);
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}
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//Write out the terminating zeroed auxilliary vector
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const uint64_t zero = 0;
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initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(),
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(uint8_t*)&zero, 2 * intSize);
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initVirtMem->writeString(aux_data_base, platform.c_str());
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copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
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copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
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initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize);
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//Set the stack pointer register
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threadContexts[0]->setIntReg(StackPointerReg, stack_min);
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Addr prog_entry = objFile->entryPoint();
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threadContexts[0]->setPC(prog_entry);
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threadContexts[0]->setNextPC(prog_entry + sizeof(MachInst));
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//Align the "stack_min" to a page boundary.
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stack_min = roundDown(stack_min, pageSize);
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// num_processes++;
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}
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