8ea5176b7f
We should always refer to the specific ISA in that arch directory. This is especially necessary if we're ever going to make it to the point where we actually have heterogeneous systems.
475 lines
18 KiB
C++
475 lines
18 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/segmentregs.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 "base/trace.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 = X86ISA::htog(type);
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a_val = X86ISA::htog(val);
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}
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X86LiveProcess::X86LiveProcess(LiveProcessParams * params,
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ObjectFile *objFile)
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: LiveProcess(params, objFile)
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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 = (Addr)0x2aaaaaaab000ULL;
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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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if (checkpointRestored)
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return;
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argsInit(sizeof(IntReg), VMPageSize);
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for (int i = 0; i < threadContexts.size(); i++) {
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ThreadContext * tc = threadContexts[i];
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SegAttr dataAttr = 0;
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dataAttr.writable = 1;
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dataAttr.readable = 1;
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dataAttr.expandDown = 0;
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dataAttr.dpl = 3;
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dataAttr.defaultSize = 0;
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dataAttr.longMode = 1;
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//Initialize the segment registers.
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for(int seg = 0; seg < NUM_SEGMENTREGS; seg++) {
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tc->setMiscRegNoEffect(MISCREG_SEG_BASE(seg), 0);
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tc->setMiscRegNoEffect(MISCREG_SEG_EFF_BASE(seg), 0);
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tc->setMiscRegNoEffect(MISCREG_SEG_ATTR(seg), dataAttr);
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}
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SegAttr csAttr = 0;
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csAttr.writable = 0;
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csAttr.readable = 1;
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csAttr.expandDown = 0;
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csAttr.dpl = 3;
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csAttr.defaultSize = 0;
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csAttr.longMode = 1;
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tc->setMiscRegNoEffect(MISCREG_CS_ATTR, csAttr);
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//Set up the registers that describe the operating mode.
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CR0 cr0 = 0;
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cr0.pg = 1; // Turn on paging.
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cr0.cd = 0; // Don't disable caching.
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cr0.nw = 0; // This is bit is defined to be ignored.
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cr0.am = 0; // No alignment checking
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cr0.wp = 0; // Supervisor mode can write read only pages
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cr0.ne = 1;
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cr0.et = 1; // This should always be 1
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cr0.ts = 0; // We don't do task switching, so causing fp exceptions
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// would be pointless.
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cr0.em = 0; // Allow x87 instructions to execute natively.
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cr0.mp = 1; // This doesn't really matter, but the manual suggests
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// setting it to one.
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cr0.pe = 1; // We're definitely in protected mode.
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tc->setMiscReg(MISCREG_CR0, cr0);
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Efer efer = 0;
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efer.sce = 1; // Enable system call extensions.
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efer.lme = 1; // Enable long mode.
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efer.lma = 1; // Activate long mode.
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efer.nxe = 1; // Enable nx support.
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efer.svme = 0; // Disable svm support for now. It isn't implemented.
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efer.ffxsr = 1; // Turn on fast fxsave and fxrstor.
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tc->setMiscReg(MISCREG_EFER, efer);
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}
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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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uint64_t align = 16;
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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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// A sentry NULL void pointer at the top of the stack.
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int sentry_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() + 1;
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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() + 1;
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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() + 1;
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}
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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 base_info_block_size =
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sentry_size + file_name_size + env_data_size + arg_data_size;
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int info_block_size = roundUp(base_info_block_size, align);
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int info_block_padding = info_block_size - base_info_block_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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//Figure out the size of the contents of the actual initial frame
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int frame_size =
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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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//There needs to be padding after the auxiliary vector data so that the
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//very bottom of the stack is aligned properly.
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int partial_size = frame_size + aux_data_size;
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int aligned_partial_size = roundUp(partial_size, align);
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int aux_padding = aligned_partial_size - partial_size;
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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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frame_size;
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stack_min = stack_base - space_needed;
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stack_min = roundDown(stack_min, align);
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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 sentry_base = stack_base - sentry_size;
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Addr file_name_base = sentry_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 - info_block_padding - aux_data_size;
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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 = X86ISA::htog(argc);
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//Write out the sentry void *
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uint64_t sentry_NULL = 0;
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initVirtMem->writeBlob(sentry_base,
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(uint8_t*)&sentry_NULL, sentry_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;
|
|
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++;
|
|
}
|