process.cc revision 7087
14166Sgblack@eecs.umich.edu/* 27087Snate@binkert.org * Copyright (c) 2007 The Hewlett-Packard Development Company 37087Snate@binkert.org * All rights reserved. 47087Snate@binkert.org * 57087Snate@binkert.org * The license below extends only to copyright in the software and shall 67087Snate@binkert.org * not be construed as granting a license to any other intellectual 77087Snate@binkert.org * property including but not limited to intellectual property relating 87087Snate@binkert.org * to a hardware implementation of the functionality of the software 97087Snate@binkert.org * licensed hereunder. You may use the software subject to the license 107087Snate@binkert.org * terms below provided that you ensure that this notice is replicated 117087Snate@binkert.org * unmodified and in its entirety in all distributions of the software, 127087Snate@binkert.org * modified or unmodified, in source code or in binary form. 137087Snate@binkert.org * 144166Sgblack@eecs.umich.edu * Copyright (c) 2003-2006 The Regents of The University of Michigan 154166Sgblack@eecs.umich.edu * All rights reserved. 164166Sgblack@eecs.umich.edu * 174166Sgblack@eecs.umich.edu * Redistribution and use in source and binary forms, with or without 184166Sgblack@eecs.umich.edu * modification, are permitted provided that the following conditions are 194166Sgblack@eecs.umich.edu * met: redistributions of source code must retain the above copyright 204166Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer; 214166Sgblack@eecs.umich.edu * redistributions in binary form must reproduce the above copyright 224166Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer in the 234166Sgblack@eecs.umich.edu * documentation and/or other materials provided with the distribution; 244166Sgblack@eecs.umich.edu * neither the name of the copyright holders nor the names of its 254166Sgblack@eecs.umich.edu * contributors may be used to endorse or promote products derived from 264166Sgblack@eecs.umich.edu * this software without specific prior written permission. 274166Sgblack@eecs.umich.edu * 284166Sgblack@eecs.umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 294166Sgblack@eecs.umich.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 304166Sgblack@eecs.umich.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 314166Sgblack@eecs.umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 324166Sgblack@eecs.umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 334166Sgblack@eecs.umich.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 344166Sgblack@eecs.umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 354166Sgblack@eecs.umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 364166Sgblack@eecs.umich.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 374166Sgblack@eecs.umich.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 384166Sgblack@eecs.umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 394166Sgblack@eecs.umich.edu * 404166Sgblack@eecs.umich.edu * Authors: Gabe Black 414166Sgblack@eecs.umich.edu * Ali Saidi 424166Sgblack@eecs.umich.edu */ 434166Sgblack@eecs.umich.edu 444166Sgblack@eecs.umich.edu#include "arch/x86/isa_traits.hh" 456313Sgblack@eecs.umich.edu#include "arch/x86/miscregs.hh" 464166Sgblack@eecs.umich.edu#include "arch/x86/process.hh" 474863Sgblack@eecs.umich.edu#include "arch/x86/segmentregs.hh" 484166Sgblack@eecs.umich.edu#include "arch/x86/types.hh" 494166Sgblack@eecs.umich.edu#include "base/loader/object_file.hh" 504166Sgblack@eecs.umich.edu#include "base/loader/elf_object.hh" 514166Sgblack@eecs.umich.edu#include "base/misc.hh" 525004Sgblack@eecs.umich.edu#include "base/trace.hh" 534166Sgblack@eecs.umich.edu#include "cpu/thread_context.hh" 544166Sgblack@eecs.umich.edu#include "mem/page_table.hh" 554166Sgblack@eecs.umich.edu#include "mem/translating_port.hh" 564434Ssaidi@eecs.umich.edu#include "sim/process_impl.hh" 575956Sgblack@eecs.umich.edu#include "sim/syscall_emul.hh" 584166Sgblack@eecs.umich.edu#include "sim/system.hh" 594166Sgblack@eecs.umich.edu 604166Sgblack@eecs.umich.eduusing namespace std; 614166Sgblack@eecs.umich.eduusing namespace X86ISA; 624166Sgblack@eecs.umich.edu 635958Sgblack@eecs.umich.edustatic const int ArgumentReg[] = { 645958Sgblack@eecs.umich.edu INTREG_RDI, 655958Sgblack@eecs.umich.edu INTREG_RSI, 665958Sgblack@eecs.umich.edu INTREG_RDX, 675958Sgblack@eecs.umich.edu //This argument register is r10 for syscalls and rcx for C. 685958Sgblack@eecs.umich.edu INTREG_R10W, 695958Sgblack@eecs.umich.edu //INTREG_RCX, 705958Sgblack@eecs.umich.edu INTREG_R8W, 715958Sgblack@eecs.umich.edu INTREG_R9W 725958Sgblack@eecs.umich.edu}; 735958Sgblack@eecs.umich.edustatic const int NumArgumentRegs = sizeof(ArgumentReg) / sizeof(const int); 745959Sgblack@eecs.umich.edustatic const int ArgumentReg32[] = { 755959Sgblack@eecs.umich.edu INTREG_EBX, 765959Sgblack@eecs.umich.edu INTREG_ECX, 775959Sgblack@eecs.umich.edu INTREG_EDX, 785959Sgblack@eecs.umich.edu INTREG_ESI, 795959Sgblack@eecs.umich.edu INTREG_EDI, 805959Sgblack@eecs.umich.edu}; 815959Sgblack@eecs.umich.edustatic const int NumArgumentRegs32 = sizeof(ArgumentReg) / sizeof(const int); 824166Sgblack@eecs.umich.edu 835956Sgblack@eecs.umich.eduX86LiveProcess::X86LiveProcess(LiveProcessParams * params, ObjectFile *objFile, 845956Sgblack@eecs.umich.edu SyscallDesc *_syscallDescs, int _numSyscallDescs) : 855956Sgblack@eecs.umich.edu LiveProcess(params, objFile), syscallDescs(_syscallDescs), 865956Sgblack@eecs.umich.edu numSyscallDescs(_numSyscallDescs) 874166Sgblack@eecs.umich.edu{ 884166Sgblack@eecs.umich.edu brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize(); 894166Sgblack@eecs.umich.edu brk_point = roundUp(brk_point, VMPageSize); 905956Sgblack@eecs.umich.edu} 914166Sgblack@eecs.umich.edu 925956Sgblack@eecs.umich.eduX86_64LiveProcess::X86_64LiveProcess(LiveProcessParams *params, 935956Sgblack@eecs.umich.edu ObjectFile *objFile, SyscallDesc *_syscallDescs, 945956Sgblack@eecs.umich.edu int _numSyscallDescs) : 955956Sgblack@eecs.umich.edu X86LiveProcess(params, objFile, _syscallDescs, _numSyscallDescs) 965956Sgblack@eecs.umich.edu{ 976709Svince@csl.cornell.edu 986709Svince@csl.cornell.edu vsyscallPage.base = 0xffffffffff600000ULL; 996709Svince@csl.cornell.edu vsyscallPage.size = VMPageSize; 1006709Svince@csl.cornell.edu vsyscallPage.vtimeOffset = 0x400; 1016709Svince@csl.cornell.edu vsyscallPage.vgettimeofdayOffset = 0x410; 1026709Svince@csl.cornell.edu 1034786Sgblack@eecs.umich.edu // Set up stack. On X86_64 Linux, stack goes from the top of memory 1044786Sgblack@eecs.umich.edu // downward, less the hole for the kernel address space plus one page 1054786Sgblack@eecs.umich.edu // for undertermined purposes. 1064793Sgblack@eecs.umich.edu stack_base = (Addr)0x7FFFFFFFF000ULL; 1074166Sgblack@eecs.umich.edu 1085956Sgblack@eecs.umich.edu // Set pointer for next thread stack. Reserve 8M for main stack. 1095956Sgblack@eecs.umich.edu next_thread_stack_base = stack_base - (8 * 1024 * 1024); 1105956Sgblack@eecs.umich.edu 1114820Sgblack@eecs.umich.edu // Set up region for mmaps. This was determined empirically and may not 1124820Sgblack@eecs.umich.edu // always be correct. 1135188Sgblack@eecs.umich.edu mmap_start = mmap_end = (Addr)0x2aaaaaaab000ULL; 1144166Sgblack@eecs.umich.edu} 1154166Sgblack@eecs.umich.edu 1165973Sgblack@eecs.umich.eduvoid 1175973Sgblack@eecs.umich.eduI386LiveProcess::syscall(int64_t callnum, ThreadContext *tc) 1185973Sgblack@eecs.umich.edu{ 1195973Sgblack@eecs.umich.edu Addr eip = tc->readPC(); 1205973Sgblack@eecs.umich.edu if (eip >= vsyscallPage.base && 1215973Sgblack@eecs.umich.edu eip < vsyscallPage.base + vsyscallPage.size) { 1225973Sgblack@eecs.umich.edu tc->setNextPC(vsyscallPage.base + vsyscallPage.vsysexitOffset); 1235973Sgblack@eecs.umich.edu } 1245973Sgblack@eecs.umich.edu X86LiveProcess::syscall(callnum, tc); 1255973Sgblack@eecs.umich.edu} 1265973Sgblack@eecs.umich.edu 1275973Sgblack@eecs.umich.edu 1285956Sgblack@eecs.umich.eduI386LiveProcess::I386LiveProcess(LiveProcessParams *params, 1295956Sgblack@eecs.umich.edu ObjectFile *objFile, SyscallDesc *_syscallDescs, 1305956Sgblack@eecs.umich.edu int _numSyscallDescs) : 1315956Sgblack@eecs.umich.edu X86LiveProcess(params, objFile, _syscallDescs, _numSyscallDescs) 1324166Sgblack@eecs.umich.edu{ 1336728Snate@binkert.org _gdtStart = ULL(0x100000000); 1345973Sgblack@eecs.umich.edu _gdtSize = VMPageSize; 1355973Sgblack@eecs.umich.edu 1365973Sgblack@eecs.umich.edu vsyscallPage.base = 0xffffe000ULL; 1375973Sgblack@eecs.umich.edu vsyscallPage.size = VMPageSize; 1385973Sgblack@eecs.umich.edu vsyscallPage.vsyscallOffset = 0x400; 1395973Sgblack@eecs.umich.edu vsyscallPage.vsysexitOffset = 0x410; 1405973Sgblack@eecs.umich.edu 1415973Sgblack@eecs.umich.edu stack_base = vsyscallPage.base; 1425956Sgblack@eecs.umich.edu 1435956Sgblack@eecs.umich.edu // Set pointer for next thread stack. Reserve 8M for main stack. 1445956Sgblack@eecs.umich.edu next_thread_stack_base = stack_base - (8 * 1024 * 1024); 1455956Sgblack@eecs.umich.edu 1465956Sgblack@eecs.umich.edu // Set up region for mmaps. This was determined empirically and may not 1475956Sgblack@eecs.umich.edu // always be correct. 1486673Sgblack@eecs.umich.edu mmap_start = mmap_end = (Addr)0xf7ffe000ULL; 1495956Sgblack@eecs.umich.edu} 1505956Sgblack@eecs.umich.edu 1515956Sgblack@eecs.umich.eduSyscallDesc* 1525956Sgblack@eecs.umich.eduX86LiveProcess::getDesc(int callnum) 1535956Sgblack@eecs.umich.edu{ 1545956Sgblack@eecs.umich.edu if (callnum < 0 || callnum >= numSyscallDescs) 1555956Sgblack@eecs.umich.edu return NULL; 1565956Sgblack@eecs.umich.edu return &syscallDescs[callnum]; 1574166Sgblack@eecs.umich.edu} 1584166Sgblack@eecs.umich.edu 1594166Sgblack@eecs.umich.eduvoid 1605956Sgblack@eecs.umich.eduX86_64LiveProcess::startup() 1614166Sgblack@eecs.umich.edu{ 1625956Sgblack@eecs.umich.edu LiveProcess::startup(); 1635956Sgblack@eecs.umich.edu 1645183Ssaidi@eecs.umich.edu if (checkpointRestored) 1655183Ssaidi@eecs.umich.edu return; 1665183Ssaidi@eecs.umich.edu 1675956Sgblack@eecs.umich.edu argsInit(sizeof(uint64_t), VMPageSize); 1685140Sgblack@eecs.umich.edu 1696709Svince@csl.cornell.edu // Set up the vsyscall page for this process. 1706709Svince@csl.cornell.edu pTable->allocate(vsyscallPage.base, vsyscallPage.size); 1716709Svince@csl.cornell.edu uint8_t vtimeBlob[] = { 1726709Svince@csl.cornell.edu 0x48,0xc7,0xc0,0xc9,0x00,0x00,0x00, // mov $0xc9,%rax 1736709Svince@csl.cornell.edu 0x0f,0x05, // syscall 1746709Svince@csl.cornell.edu 0xc3 // retq 1756709Svince@csl.cornell.edu }; 1766709Svince@csl.cornell.edu initVirtMem->writeBlob(vsyscallPage.base + vsyscallPage.vtimeOffset, 1776709Svince@csl.cornell.edu vtimeBlob, sizeof(vtimeBlob)); 1786709Svince@csl.cornell.edu 1796709Svince@csl.cornell.edu uint8_t vgettimeofdayBlob[] = { 1806709Svince@csl.cornell.edu 0x48,0xc7,0xc0,0x60,0x00,0x00,0x00, // mov $0x60,%rax 1816709Svince@csl.cornell.edu 0x0f,0x05, // syscall 1826709Svince@csl.cornell.edu 0xc3 // retq 1836709Svince@csl.cornell.edu }; 1846709Svince@csl.cornell.edu initVirtMem->writeBlob(vsyscallPage.base + vsyscallPage.vgettimeofdayOffset, 1856709Svince@csl.cornell.edu vgettimeofdayBlob, sizeof(vgettimeofdayBlob)); 1866709Svince@csl.cornell.edu 1875713Shsul@eecs.umich.edu for (int i = 0; i < contextIds.size(); i++) { 1885713Shsul@eecs.umich.edu ThreadContext * tc = system->getThreadContext(contextIds[i]); 1895140Sgblack@eecs.umich.edu 1905140Sgblack@eecs.umich.edu SegAttr dataAttr = 0; 1916222Sgblack@eecs.umich.edu dataAttr.dpl = 3; 1926222Sgblack@eecs.umich.edu dataAttr.unusable = 0; 1936222Sgblack@eecs.umich.edu dataAttr.defaultSize = 1; 1946222Sgblack@eecs.umich.edu dataAttr.longMode = 1; 1956222Sgblack@eecs.umich.edu dataAttr.avl = 0; 1966222Sgblack@eecs.umich.edu dataAttr.granularity = 1; 1976222Sgblack@eecs.umich.edu dataAttr.present = 1; 1986222Sgblack@eecs.umich.edu dataAttr.type = 3; 1995140Sgblack@eecs.umich.edu dataAttr.writable = 1; 2005140Sgblack@eecs.umich.edu dataAttr.readable = 1; 2015140Sgblack@eecs.umich.edu dataAttr.expandDown = 0; 2026222Sgblack@eecs.umich.edu dataAttr.system = 1; 2035140Sgblack@eecs.umich.edu 2045140Sgblack@eecs.umich.edu //Initialize the segment registers. 2055140Sgblack@eecs.umich.edu for(int seg = 0; seg < NUM_SEGMENTREGS; seg++) { 2065140Sgblack@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_SEG_BASE(seg), 0); 2075289Sgblack@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_SEG_EFF_BASE(seg), 0); 2085140Sgblack@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_SEG_ATTR(seg), dataAttr); 2095140Sgblack@eecs.umich.edu } 2105140Sgblack@eecs.umich.edu 2115140Sgblack@eecs.umich.edu SegAttr csAttr = 0; 2126222Sgblack@eecs.umich.edu csAttr.dpl = 3; 2136222Sgblack@eecs.umich.edu csAttr.unusable = 0; 2146222Sgblack@eecs.umich.edu csAttr.defaultSize = 0; 2156222Sgblack@eecs.umich.edu csAttr.longMode = 1; 2166222Sgblack@eecs.umich.edu csAttr.avl = 0; 2176222Sgblack@eecs.umich.edu csAttr.granularity = 1; 2186222Sgblack@eecs.umich.edu csAttr.present = 1; 2196222Sgblack@eecs.umich.edu csAttr.type = 10; 2205140Sgblack@eecs.umich.edu csAttr.writable = 0; 2215140Sgblack@eecs.umich.edu csAttr.readable = 1; 2225140Sgblack@eecs.umich.edu csAttr.expandDown = 0; 2236222Sgblack@eecs.umich.edu csAttr.system = 1; 2245140Sgblack@eecs.umich.edu 2255140Sgblack@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_CS_ATTR, csAttr); 2265140Sgblack@eecs.umich.edu 2276140Sgblack@eecs.umich.edu Efer efer = 0; 2286140Sgblack@eecs.umich.edu efer.sce = 1; // Enable system call extensions. 2296140Sgblack@eecs.umich.edu efer.lme = 1; // Enable long mode. 2306140Sgblack@eecs.umich.edu efer.lma = 1; // Activate long mode. 2316140Sgblack@eecs.umich.edu efer.nxe = 1; // Enable nx support. 2326140Sgblack@eecs.umich.edu efer.svme = 0; // Disable svm support for now. It isn't implemented. 2336140Sgblack@eecs.umich.edu efer.ffxsr = 1; // Turn on fast fxsave and fxrstor. 2346140Sgblack@eecs.umich.edu tc->setMiscReg(MISCREG_EFER, efer); 2356140Sgblack@eecs.umich.edu 2365140Sgblack@eecs.umich.edu //Set up the registers that describe the operating mode. 2375140Sgblack@eecs.umich.edu CR0 cr0 = 0; 2385140Sgblack@eecs.umich.edu cr0.pg = 1; // Turn on paging. 2395140Sgblack@eecs.umich.edu cr0.cd = 0; // Don't disable caching. 2405140Sgblack@eecs.umich.edu cr0.nw = 0; // This is bit is defined to be ignored. 2415140Sgblack@eecs.umich.edu cr0.am = 0; // No alignment checking 2425140Sgblack@eecs.umich.edu cr0.wp = 0; // Supervisor mode can write read only pages 2435140Sgblack@eecs.umich.edu cr0.ne = 1; 2445140Sgblack@eecs.umich.edu cr0.et = 1; // This should always be 1 2455140Sgblack@eecs.umich.edu cr0.ts = 0; // We don't do task switching, so causing fp exceptions 2465140Sgblack@eecs.umich.edu // would be pointless. 2475140Sgblack@eecs.umich.edu cr0.em = 0; // Allow x87 instructions to execute natively. 2485140Sgblack@eecs.umich.edu cr0.mp = 1; // This doesn't really matter, but the manual suggests 2495140Sgblack@eecs.umich.edu // setting it to one. 2505140Sgblack@eecs.umich.edu cr0.pe = 1; // We're definitely in protected mode. 2515140Sgblack@eecs.umich.edu tc->setMiscReg(MISCREG_CR0, cr0); 2526609Sgblack@eecs.umich.edu 2536609Sgblack@eecs.umich.edu tc->setMiscReg(MISCREG_MXCSR, 0x1f80); 2545140Sgblack@eecs.umich.edu } 2554166Sgblack@eecs.umich.edu} 2564166Sgblack@eecs.umich.edu 2574166Sgblack@eecs.umich.eduvoid 2585956Sgblack@eecs.umich.eduI386LiveProcess::startup() 2594166Sgblack@eecs.umich.edu{ 2605956Sgblack@eecs.umich.edu LiveProcess::startup(); 2615956Sgblack@eecs.umich.edu 2625956Sgblack@eecs.umich.edu if (checkpointRestored) 2635956Sgblack@eecs.umich.edu return; 2645956Sgblack@eecs.umich.edu 2655956Sgblack@eecs.umich.edu argsInit(sizeof(uint32_t), VMPageSize); 2665956Sgblack@eecs.umich.edu 2675962Sgblack@eecs.umich.edu /* 2685962Sgblack@eecs.umich.edu * Set up a GDT for this process. The whole GDT wouldn't really be for 2695962Sgblack@eecs.umich.edu * this process, but the only parts we care about are. 2705962Sgblack@eecs.umich.edu */ 2715962Sgblack@eecs.umich.edu pTable->allocate(_gdtStart, _gdtSize); 2725962Sgblack@eecs.umich.edu uint64_t zero = 0; 2735962Sgblack@eecs.umich.edu assert(_gdtSize % sizeof(zero) == 0); 2745962Sgblack@eecs.umich.edu for (Addr gdtCurrent = _gdtStart; 2755962Sgblack@eecs.umich.edu gdtCurrent < _gdtStart + _gdtSize; gdtCurrent += sizeof(zero)) { 2765962Sgblack@eecs.umich.edu initVirtMem->write(gdtCurrent, zero); 2775962Sgblack@eecs.umich.edu } 2785962Sgblack@eecs.umich.edu 2795973Sgblack@eecs.umich.edu // Set up the vsyscall page for this process. 2805973Sgblack@eecs.umich.edu pTable->allocate(vsyscallPage.base, vsyscallPage.size); 2815973Sgblack@eecs.umich.edu uint8_t vsyscallBlob[] = { 2825973Sgblack@eecs.umich.edu 0x51, // push %ecx 2835973Sgblack@eecs.umich.edu 0x52, // push %edp 2845973Sgblack@eecs.umich.edu 0x55, // push %ebp 2855973Sgblack@eecs.umich.edu 0x89, 0xe5, // mov %esp, %ebp 2865973Sgblack@eecs.umich.edu 0x0f, 0x34 // sysenter 2875973Sgblack@eecs.umich.edu }; 2885973Sgblack@eecs.umich.edu initVirtMem->writeBlob(vsyscallPage.base + vsyscallPage.vsyscallOffset, 2895973Sgblack@eecs.umich.edu vsyscallBlob, sizeof(vsyscallBlob)); 2905973Sgblack@eecs.umich.edu 2915973Sgblack@eecs.umich.edu uint8_t vsysexitBlob[] = { 2925973Sgblack@eecs.umich.edu 0x5d, // pop %ebp 2935973Sgblack@eecs.umich.edu 0x5a, // pop %edx 2945973Sgblack@eecs.umich.edu 0x59, // pop %ecx 2955973Sgblack@eecs.umich.edu 0xc3 // ret 2965973Sgblack@eecs.umich.edu }; 2975973Sgblack@eecs.umich.edu initVirtMem->writeBlob(vsyscallPage.base + vsyscallPage.vsysexitOffset, 2985973Sgblack@eecs.umich.edu vsysexitBlob, sizeof(vsysexitBlob)); 2995973Sgblack@eecs.umich.edu 3005956Sgblack@eecs.umich.edu for (int i = 0; i < contextIds.size(); i++) { 3015956Sgblack@eecs.umich.edu ThreadContext * tc = system->getThreadContext(contextIds[i]); 3025956Sgblack@eecs.umich.edu 3035956Sgblack@eecs.umich.edu SegAttr dataAttr = 0; 3046222Sgblack@eecs.umich.edu dataAttr.dpl = 3; 3056222Sgblack@eecs.umich.edu dataAttr.unusable = 0; 3066222Sgblack@eecs.umich.edu dataAttr.defaultSize = 1; 3076222Sgblack@eecs.umich.edu dataAttr.longMode = 0; 3086222Sgblack@eecs.umich.edu dataAttr.avl = 0; 3096222Sgblack@eecs.umich.edu dataAttr.granularity = 1; 3106222Sgblack@eecs.umich.edu dataAttr.present = 1; 3116222Sgblack@eecs.umich.edu dataAttr.type = 3; 3125956Sgblack@eecs.umich.edu dataAttr.writable = 1; 3135956Sgblack@eecs.umich.edu dataAttr.readable = 1; 3145956Sgblack@eecs.umich.edu dataAttr.expandDown = 0; 3156222Sgblack@eecs.umich.edu dataAttr.system = 1; 3165956Sgblack@eecs.umich.edu 3175956Sgblack@eecs.umich.edu //Initialize the segment registers. 3185956Sgblack@eecs.umich.edu for(int seg = 0; seg < NUM_SEGMENTREGS; seg++) { 3195956Sgblack@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_SEG_BASE(seg), 0); 3205956Sgblack@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_SEG_EFF_BASE(seg), 0); 3215956Sgblack@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_SEG_ATTR(seg), dataAttr); 3225956Sgblack@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_SEG_SEL(seg), 0xB); 3235959Sgblack@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_SEG_LIMIT(seg), (uint32_t)(-1)); 3245956Sgblack@eecs.umich.edu } 3255956Sgblack@eecs.umich.edu 3265956Sgblack@eecs.umich.edu SegAttr csAttr = 0; 3276222Sgblack@eecs.umich.edu csAttr.dpl = 3; 3286222Sgblack@eecs.umich.edu csAttr.unusable = 0; 3296222Sgblack@eecs.umich.edu csAttr.defaultSize = 1; 3306222Sgblack@eecs.umich.edu csAttr.longMode = 0; 3316222Sgblack@eecs.umich.edu csAttr.avl = 0; 3326222Sgblack@eecs.umich.edu csAttr.granularity = 1; 3336222Sgblack@eecs.umich.edu csAttr.present = 1; 3346222Sgblack@eecs.umich.edu csAttr.type = 0xa; 3355956Sgblack@eecs.umich.edu csAttr.writable = 0; 3365956Sgblack@eecs.umich.edu csAttr.readable = 1; 3375956Sgblack@eecs.umich.edu csAttr.expandDown = 0; 3386222Sgblack@eecs.umich.edu csAttr.system = 1; 3395956Sgblack@eecs.umich.edu 3405956Sgblack@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_CS_ATTR, csAttr); 3415956Sgblack@eecs.umich.edu 3425962Sgblack@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_TSG_BASE, _gdtStart); 3435962Sgblack@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_TSG_EFF_BASE, _gdtStart); 3445962Sgblack@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_TSG_LIMIT, _gdtStart + _gdtSize - 1); 3455962Sgblack@eecs.umich.edu 3465963Sgblack@eecs.umich.edu // Set the LDT selector to 0 to deactivate it. 3475963Sgblack@eecs.umich.edu tc->setMiscRegNoEffect(MISCREG_TSL, 0); 3485963Sgblack@eecs.umich.edu 3496140Sgblack@eecs.umich.edu Efer efer = 0; 3506140Sgblack@eecs.umich.edu efer.sce = 1; // Enable system call extensions. 3516140Sgblack@eecs.umich.edu efer.lme = 1; // Enable long mode. 3526140Sgblack@eecs.umich.edu efer.lma = 0; // Deactivate long mode. 3536140Sgblack@eecs.umich.edu efer.nxe = 1; // Enable nx support. 3546140Sgblack@eecs.umich.edu efer.svme = 0; // Disable svm support for now. It isn't implemented. 3556140Sgblack@eecs.umich.edu efer.ffxsr = 1; // Turn on fast fxsave and fxrstor. 3566140Sgblack@eecs.umich.edu tc->setMiscReg(MISCREG_EFER, efer); 3576140Sgblack@eecs.umich.edu 3585956Sgblack@eecs.umich.edu //Set up the registers that describe the operating mode. 3595956Sgblack@eecs.umich.edu CR0 cr0 = 0; 3605956Sgblack@eecs.umich.edu cr0.pg = 1; // Turn on paging. 3615956Sgblack@eecs.umich.edu cr0.cd = 0; // Don't disable caching. 3625956Sgblack@eecs.umich.edu cr0.nw = 0; // This is bit is defined to be ignored. 3635956Sgblack@eecs.umich.edu cr0.am = 0; // No alignment checking 3645956Sgblack@eecs.umich.edu cr0.wp = 0; // Supervisor mode can write read only pages 3655956Sgblack@eecs.umich.edu cr0.ne = 1; 3665956Sgblack@eecs.umich.edu cr0.et = 1; // This should always be 1 3675956Sgblack@eecs.umich.edu cr0.ts = 0; // We don't do task switching, so causing fp exceptions 3685956Sgblack@eecs.umich.edu // would be pointless. 3695956Sgblack@eecs.umich.edu cr0.em = 0; // Allow x87 instructions to execute natively. 3705956Sgblack@eecs.umich.edu cr0.mp = 1; // This doesn't really matter, but the manual suggests 3715956Sgblack@eecs.umich.edu // setting it to one. 3725956Sgblack@eecs.umich.edu cr0.pe = 1; // We're definitely in protected mode. 3735956Sgblack@eecs.umich.edu tc->setMiscReg(MISCREG_CR0, cr0); 3746609Sgblack@eecs.umich.edu 3756609Sgblack@eecs.umich.edu tc->setMiscReg(MISCREG_MXCSR, 0x1f80); 3765956Sgblack@eecs.umich.edu } 3775956Sgblack@eecs.umich.edu} 3785956Sgblack@eecs.umich.edu 3795956Sgblack@eecs.umich.edutemplate<class IntType> 3805956Sgblack@eecs.umich.eduvoid 3815973Sgblack@eecs.umich.eduX86LiveProcess::argsInit(int pageSize, 3825973Sgblack@eecs.umich.edu std::vector<AuxVector<IntType> > extraAuxvs) 3835956Sgblack@eecs.umich.edu{ 3845956Sgblack@eecs.umich.edu int intSize = sizeof(IntType); 3855956Sgblack@eecs.umich.edu 3865956Sgblack@eecs.umich.edu typedef AuxVector<IntType> auxv_t; 3875973Sgblack@eecs.umich.edu std::vector<auxv_t> auxv = extraAuxvs; 3885758Shsul@eecs.umich.edu 3894166Sgblack@eecs.umich.edu string filename; 3904166Sgblack@eecs.umich.edu if(argv.size() < 1) 3914166Sgblack@eecs.umich.edu filename = ""; 3924166Sgblack@eecs.umich.edu else 3934166Sgblack@eecs.umich.edu filename = argv[0]; 3944166Sgblack@eecs.umich.edu 3954793Sgblack@eecs.umich.edu //We want 16 byte alignment 3964849Sgblack@eecs.umich.edu uint64_t align = 16; 3974166Sgblack@eecs.umich.edu 3984166Sgblack@eecs.umich.edu // load object file into target memory 3994166Sgblack@eecs.umich.edu objFile->loadSections(initVirtMem); 4004166Sgblack@eecs.umich.edu 4014793Sgblack@eecs.umich.edu enum X86CpuFeature { 4024793Sgblack@eecs.umich.edu X86_OnboardFPU = 1 << 0, 4034793Sgblack@eecs.umich.edu X86_VirtualModeExtensions = 1 << 1, 4044793Sgblack@eecs.umich.edu X86_DebuggingExtensions = 1 << 2, 4054793Sgblack@eecs.umich.edu X86_PageSizeExtensions = 1 << 3, 4064777Sgblack@eecs.umich.edu 4074793Sgblack@eecs.umich.edu X86_TimeStampCounter = 1 << 4, 4084793Sgblack@eecs.umich.edu X86_ModelSpecificRegisters = 1 << 5, 4094793Sgblack@eecs.umich.edu X86_PhysicalAddressExtensions = 1 << 6, 4104793Sgblack@eecs.umich.edu X86_MachineCheckExtensions = 1 << 7, 4114777Sgblack@eecs.umich.edu 4124793Sgblack@eecs.umich.edu X86_CMPXCHG8Instruction = 1 << 8, 4134793Sgblack@eecs.umich.edu X86_OnboardAPIC = 1 << 9, 4144793Sgblack@eecs.umich.edu X86_SYSENTER_SYSEXIT = 1 << 11, 4154793Sgblack@eecs.umich.edu 4164793Sgblack@eecs.umich.edu X86_MemoryTypeRangeRegisters = 1 << 12, 4174793Sgblack@eecs.umich.edu X86_PageGlobalEnable = 1 << 13, 4184793Sgblack@eecs.umich.edu X86_MachineCheckArchitecture = 1 << 14, 4194793Sgblack@eecs.umich.edu X86_CMOVInstruction = 1 << 15, 4204793Sgblack@eecs.umich.edu 4214793Sgblack@eecs.umich.edu X86_PageAttributeTable = 1 << 16, 4224793Sgblack@eecs.umich.edu X86_36BitPSEs = 1 << 17, 4234793Sgblack@eecs.umich.edu X86_ProcessorSerialNumber = 1 << 18, 4244793Sgblack@eecs.umich.edu X86_CLFLUSHInstruction = 1 << 19, 4254793Sgblack@eecs.umich.edu 4264793Sgblack@eecs.umich.edu X86_DebugTraceStore = 1 << 21, 4274793Sgblack@eecs.umich.edu X86_ACPIViaMSR = 1 << 22, 4284793Sgblack@eecs.umich.edu X86_MultimediaExtensions = 1 << 23, 4294793Sgblack@eecs.umich.edu 4304793Sgblack@eecs.umich.edu X86_FXSAVE_FXRSTOR = 1 << 24, 4314793Sgblack@eecs.umich.edu X86_StreamingSIMDExtensions = 1 << 25, 4324793Sgblack@eecs.umich.edu X86_StreamingSIMDExtensions2 = 1 << 26, 4334793Sgblack@eecs.umich.edu X86_CPUSelfSnoop = 1 << 27, 4344793Sgblack@eecs.umich.edu 4354793Sgblack@eecs.umich.edu X86_HyperThreading = 1 << 28, 4364793Sgblack@eecs.umich.edu X86_AutomaticClockControl = 1 << 29, 4374793Sgblack@eecs.umich.edu X86_IA64Processor = 1 << 30 4384166Sgblack@eecs.umich.edu }; 4394166Sgblack@eecs.umich.edu 4404166Sgblack@eecs.umich.edu //Setup the auxilliary vectors. These will already have endian conversion. 4414166Sgblack@eecs.umich.edu //Auxilliary vectors are loaded only for elf formatted executables. 4424166Sgblack@eecs.umich.edu ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile); 4434166Sgblack@eecs.umich.edu if(elfObject) 4444166Sgblack@eecs.umich.edu { 4454793Sgblack@eecs.umich.edu uint64_t features = 4464793Sgblack@eecs.umich.edu X86_OnboardFPU | 4474793Sgblack@eecs.umich.edu X86_VirtualModeExtensions | 4484793Sgblack@eecs.umich.edu X86_DebuggingExtensions | 4494793Sgblack@eecs.umich.edu X86_PageSizeExtensions | 4504793Sgblack@eecs.umich.edu X86_TimeStampCounter | 4514793Sgblack@eecs.umich.edu X86_ModelSpecificRegisters | 4524793Sgblack@eecs.umich.edu X86_PhysicalAddressExtensions | 4534793Sgblack@eecs.umich.edu X86_MachineCheckExtensions | 4544793Sgblack@eecs.umich.edu X86_CMPXCHG8Instruction | 4554793Sgblack@eecs.umich.edu X86_OnboardAPIC | 4564793Sgblack@eecs.umich.edu X86_SYSENTER_SYSEXIT | 4574793Sgblack@eecs.umich.edu X86_MemoryTypeRangeRegisters | 4584793Sgblack@eecs.umich.edu X86_PageGlobalEnable | 4594793Sgblack@eecs.umich.edu X86_MachineCheckArchitecture | 4604793Sgblack@eecs.umich.edu X86_CMOVInstruction | 4614793Sgblack@eecs.umich.edu X86_PageAttributeTable | 4624793Sgblack@eecs.umich.edu X86_36BitPSEs | 4634793Sgblack@eecs.umich.edu// X86_ProcessorSerialNumber | 4644793Sgblack@eecs.umich.edu X86_CLFLUSHInstruction | 4654793Sgblack@eecs.umich.edu// X86_DebugTraceStore | 4664793Sgblack@eecs.umich.edu// X86_ACPIViaMSR | 4674793Sgblack@eecs.umich.edu X86_MultimediaExtensions | 4684793Sgblack@eecs.umich.edu X86_FXSAVE_FXRSTOR | 4694793Sgblack@eecs.umich.edu X86_StreamingSIMDExtensions | 4704793Sgblack@eecs.umich.edu X86_StreamingSIMDExtensions2 | 4714793Sgblack@eecs.umich.edu// X86_CPUSelfSnoop | 4724793Sgblack@eecs.umich.edu// X86_HyperThreading | 4734793Sgblack@eecs.umich.edu// X86_AutomaticClockControl | 4744793Sgblack@eecs.umich.edu// X86_IA64Processor | 4754793Sgblack@eecs.umich.edu 0; 4764793Sgblack@eecs.umich.edu 4774166Sgblack@eecs.umich.edu //Bits which describe the system hardware capabilities 4784777Sgblack@eecs.umich.edu //XXX Figure out what these should be 4794793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_HWCAP, features)); 4804166Sgblack@eecs.umich.edu //The system page size 4814793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_PAGESZ, X86ISA::VMPageSize)); 4824166Sgblack@eecs.umich.edu //Frequency at which times() increments 4836363Sgblack@eecs.umich.edu //Defined to be 100 in the kernel source. 4844793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_CLKTCK, 100)); 4854166Sgblack@eecs.umich.edu // For statically linked executables, this is the virtual address of the 4864166Sgblack@eecs.umich.edu // program header tables if they appear in the executable image 4874793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable())); 4884166Sgblack@eecs.umich.edu // This is the size of a program header entry from the elf file. 4894793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize())); 4904166Sgblack@eecs.umich.edu // This is the number of program headers from the original elf file. 4914793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount())); 4924166Sgblack@eecs.umich.edu //This is the address of the elf "interpreter", It should be set 4934166Sgblack@eecs.umich.edu //to 0 for regular executables. It should be something else 4944166Sgblack@eecs.umich.edu //(not sure what) for dynamic libraries. 4954793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_BASE, 0)); 4964777Sgblack@eecs.umich.edu 4974777Sgblack@eecs.umich.edu //XXX Figure out what this should be. 4984793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_FLAGS, 0)); 4994166Sgblack@eecs.umich.edu //The entry point to the program 5004793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint())); 5014166Sgblack@eecs.umich.edu //Different user and group IDs 5024793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_UID, uid())); 5034793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_EUID, euid())); 5044793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_GID, gid())); 5054793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_EGID, egid())); 5064166Sgblack@eecs.umich.edu //Whether to enable "secure mode" in the executable 5074793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_SECURE, 0)); 5087073Sgblack@eecs.umich.edu //The address of 16 "random" bytes. 5097073Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_RANDOM, 0)); 5107073Sgblack@eecs.umich.edu //The name of the program 5117073Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_EXECFN, 0)); 5127073Sgblack@eecs.umich.edu //The platform string 5134793Sgblack@eecs.umich.edu auxv.push_back(auxv_t(M5_AT_PLATFORM, 0)); 5144166Sgblack@eecs.umich.edu } 5154166Sgblack@eecs.umich.edu 5164166Sgblack@eecs.umich.edu //Figure out how big the initial stack needs to be 5174166Sgblack@eecs.umich.edu 5184849Sgblack@eecs.umich.edu // A sentry NULL void pointer at the top of the stack. 5194849Sgblack@eecs.umich.edu int sentry_size = intSize; 5204166Sgblack@eecs.umich.edu 5214166Sgblack@eecs.umich.edu //This is the name of the file which is present on the initial stack 5224166Sgblack@eecs.umich.edu //It's purpose is to let the user space linker examine the original file. 5234847Sgblack@eecs.umich.edu int file_name_size = filename.size() + 1; 5244793Sgblack@eecs.umich.edu 5257073Sgblack@eecs.umich.edu const int numRandomBytes = 16; 5267073Sgblack@eecs.umich.edu int aux_data_size = numRandomBytes; 5277073Sgblack@eecs.umich.edu 5284793Sgblack@eecs.umich.edu string platform = "x86_64"; 5297073Sgblack@eecs.umich.edu aux_data_size += platform.size() + 1; 5304166Sgblack@eecs.umich.edu 5314166Sgblack@eecs.umich.edu int env_data_size = 0; 5324166Sgblack@eecs.umich.edu for (int i = 0; i < envp.size(); ++i) { 5334847Sgblack@eecs.umich.edu env_data_size += envp[i].size() + 1; 5344166Sgblack@eecs.umich.edu } 5354166Sgblack@eecs.umich.edu int arg_data_size = 0; 5364166Sgblack@eecs.umich.edu for (int i = 0; i < argv.size(); ++i) { 5374847Sgblack@eecs.umich.edu arg_data_size += argv[i].size() + 1; 5384166Sgblack@eecs.umich.edu } 5394166Sgblack@eecs.umich.edu 5404166Sgblack@eecs.umich.edu //The info_block needs to be padded so it's size is a multiple of the 5414166Sgblack@eecs.umich.edu //alignment mask. Also, it appears that there needs to be at least some 5424166Sgblack@eecs.umich.edu //padding, so if the size is already a multiple, we need to increase it 5434166Sgblack@eecs.umich.edu //anyway. 5444849Sgblack@eecs.umich.edu int base_info_block_size = 5454849Sgblack@eecs.umich.edu sentry_size + file_name_size + env_data_size + arg_data_size; 5464166Sgblack@eecs.umich.edu 5474849Sgblack@eecs.umich.edu int info_block_size = roundUp(base_info_block_size, align); 5484849Sgblack@eecs.umich.edu 5494849Sgblack@eecs.umich.edu int info_block_padding = info_block_size - base_info_block_size; 5504166Sgblack@eecs.umich.edu 5514166Sgblack@eecs.umich.edu //Each auxilliary vector is two 8 byte words 5524166Sgblack@eecs.umich.edu int aux_array_size = intSize * 2 * (auxv.size() + 1); 5534166Sgblack@eecs.umich.edu 5544166Sgblack@eecs.umich.edu int envp_array_size = intSize * (envp.size() + 1); 5554166Sgblack@eecs.umich.edu int argv_array_size = intSize * (argv.size() + 1); 5564166Sgblack@eecs.umich.edu 5574166Sgblack@eecs.umich.edu int argc_size = intSize; 5584166Sgblack@eecs.umich.edu 5594849Sgblack@eecs.umich.edu //Figure out the size of the contents of the actual initial frame 5604849Sgblack@eecs.umich.edu int frame_size = 5614166Sgblack@eecs.umich.edu aux_array_size + 5624166Sgblack@eecs.umich.edu envp_array_size + 5634166Sgblack@eecs.umich.edu argv_array_size + 5644607Sgblack@eecs.umich.edu argc_size; 5654166Sgblack@eecs.umich.edu 5664849Sgblack@eecs.umich.edu //There needs to be padding after the auxiliary vector data so that the 5674849Sgblack@eecs.umich.edu //very bottom of the stack is aligned properly. 5684849Sgblack@eecs.umich.edu int partial_size = frame_size + aux_data_size; 5694849Sgblack@eecs.umich.edu int aligned_partial_size = roundUp(partial_size, align); 5704849Sgblack@eecs.umich.edu int aux_padding = aligned_partial_size - partial_size; 5714849Sgblack@eecs.umich.edu 5724849Sgblack@eecs.umich.edu int space_needed = 5734849Sgblack@eecs.umich.edu info_block_size + 5744849Sgblack@eecs.umich.edu aux_data_size + 5754849Sgblack@eecs.umich.edu aux_padding + 5764849Sgblack@eecs.umich.edu frame_size; 5774849Sgblack@eecs.umich.edu 5784166Sgblack@eecs.umich.edu stack_min = stack_base - space_needed; 5794849Sgblack@eecs.umich.edu stack_min = roundDown(stack_min, align); 5804166Sgblack@eecs.umich.edu stack_size = stack_base - stack_min; 5814166Sgblack@eecs.umich.edu 5824166Sgblack@eecs.umich.edu // map memory 5834166Sgblack@eecs.umich.edu pTable->allocate(roundDown(stack_min, pageSize), 5844166Sgblack@eecs.umich.edu roundUp(stack_size, pageSize)); 5854166Sgblack@eecs.umich.edu 5864166Sgblack@eecs.umich.edu // map out initial stack contents 5875956Sgblack@eecs.umich.edu IntType sentry_base = stack_base - sentry_size; 5885956Sgblack@eecs.umich.edu IntType file_name_base = sentry_base - file_name_size; 5895956Sgblack@eecs.umich.edu IntType env_data_base = file_name_base - env_data_size; 5905956Sgblack@eecs.umich.edu IntType arg_data_base = env_data_base - arg_data_size; 5915956Sgblack@eecs.umich.edu IntType aux_data_base = arg_data_base - info_block_padding - aux_data_size; 5925956Sgblack@eecs.umich.edu IntType auxv_array_base = aux_data_base - aux_array_size - aux_padding; 5935956Sgblack@eecs.umich.edu IntType envp_array_base = auxv_array_base - envp_array_size; 5945956Sgblack@eecs.umich.edu IntType argv_array_base = envp_array_base - argv_array_size; 5955956Sgblack@eecs.umich.edu IntType argc_base = argv_array_base - argc_size; 5964166Sgblack@eecs.umich.edu 5975941Sgblack@eecs.umich.edu DPRINTF(Stack, "The addresses of items on the initial stack:\n"); 5985941Sgblack@eecs.umich.edu DPRINTF(Stack, "0x%x - file name\n", file_name_base); 5995941Sgblack@eecs.umich.edu DPRINTF(Stack, "0x%x - env data\n", env_data_base); 6005941Sgblack@eecs.umich.edu DPRINTF(Stack, "0x%x - arg data\n", arg_data_base); 6015941Sgblack@eecs.umich.edu DPRINTF(Stack, "0x%x - aux data\n", aux_data_base); 6025941Sgblack@eecs.umich.edu DPRINTF(Stack, "0x%x - auxv array\n", auxv_array_base); 6035941Sgblack@eecs.umich.edu DPRINTF(Stack, "0x%x - envp array\n", envp_array_base); 6045941Sgblack@eecs.umich.edu DPRINTF(Stack, "0x%x - argv array\n", argv_array_base); 6055941Sgblack@eecs.umich.edu DPRINTF(Stack, "0x%x - argc \n", argc_base); 6065941Sgblack@eecs.umich.edu DPRINTF(Stack, "0x%x - stack min\n", stack_min); 6074166Sgblack@eecs.umich.edu 6084166Sgblack@eecs.umich.edu // write contents to stack 6094166Sgblack@eecs.umich.edu 6104166Sgblack@eecs.umich.edu // figure out argc 6115956Sgblack@eecs.umich.edu IntType argc = argv.size(); 6125956Sgblack@eecs.umich.edu IntType guestArgc = X86ISA::htog(argc); 6134166Sgblack@eecs.umich.edu 6144849Sgblack@eecs.umich.edu //Write out the sentry void * 6155956Sgblack@eecs.umich.edu IntType sentry_NULL = 0; 6164849Sgblack@eecs.umich.edu initVirtMem->writeBlob(sentry_base, 6174849Sgblack@eecs.umich.edu (uint8_t*)&sentry_NULL, sentry_size); 6184166Sgblack@eecs.umich.edu 6194166Sgblack@eecs.umich.edu //Write the file name 6204166Sgblack@eecs.umich.edu initVirtMem->writeString(file_name_base, filename.c_str()); 6214166Sgblack@eecs.umich.edu 6227073Sgblack@eecs.umich.edu //Fix up the aux vectors which point to data 6237073Sgblack@eecs.umich.edu assert(auxv[auxv.size() - 3].a_type == M5_AT_RANDOM); 6247073Sgblack@eecs.umich.edu auxv[auxv.size() - 3].a_val = aux_data_base; 6257073Sgblack@eecs.umich.edu assert(auxv[auxv.size() - 2].a_type == M5_AT_EXECFN); 6267073Sgblack@eecs.umich.edu auxv[auxv.size() - 2].a_val = argv_array_base; 6277073Sgblack@eecs.umich.edu assert(auxv[auxv.size() - 1].a_type == M5_AT_PLATFORM); 6287073Sgblack@eecs.umich.edu auxv[auxv.size() - 1].a_val = aux_data_base + numRandomBytes; 6294793Sgblack@eecs.umich.edu 6304166Sgblack@eecs.umich.edu //Copy the aux stuff 6314166Sgblack@eecs.umich.edu for(int x = 0; x < auxv.size(); x++) 6324166Sgblack@eecs.umich.edu { 6334166Sgblack@eecs.umich.edu initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize, 6344166Sgblack@eecs.umich.edu (uint8_t*)&(auxv[x].a_type), intSize); 6354166Sgblack@eecs.umich.edu initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize, 6364166Sgblack@eecs.umich.edu (uint8_t*)&(auxv[x].a_val), intSize); 6374166Sgblack@eecs.umich.edu } 6384166Sgblack@eecs.umich.edu //Write out the terminating zeroed auxilliary vector 6394166Sgblack@eecs.umich.edu const uint64_t zero = 0; 6404166Sgblack@eecs.umich.edu initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(), 6414166Sgblack@eecs.umich.edu (uint8_t*)&zero, 2 * intSize); 6424166Sgblack@eecs.umich.edu 6434793Sgblack@eecs.umich.edu initVirtMem->writeString(aux_data_base, platform.c_str()); 6444793Sgblack@eecs.umich.edu 6454166Sgblack@eecs.umich.edu copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); 6464166Sgblack@eecs.umich.edu copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); 6474166Sgblack@eecs.umich.edu 6484166Sgblack@eecs.umich.edu initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize); 6494166Sgblack@eecs.umich.edu 6505713Shsul@eecs.umich.edu ThreadContext *tc = system->getThreadContext(contextIds[0]); 6514793Sgblack@eecs.umich.edu //Set the stack pointer register 6525713Shsul@eecs.umich.edu tc->setIntReg(StackPointerReg, stack_min); 6534166Sgblack@eecs.umich.edu 6544166Sgblack@eecs.umich.edu Addr prog_entry = objFile->entryPoint(); 6555246Sgblack@eecs.umich.edu // There doesn't need to be any segment base added in since we're dealing 6565246Sgblack@eecs.umich.edu // with the flat segmentation model. 6575713Shsul@eecs.umich.edu tc->setPC(prog_entry); 6585713Shsul@eecs.umich.edu tc->setNextPC(prog_entry + sizeof(MachInst)); 6594166Sgblack@eecs.umich.edu 6604166Sgblack@eecs.umich.edu //Align the "stack_min" to a page boundary. 6614166Sgblack@eecs.umich.edu stack_min = roundDown(stack_min, pageSize); 6624166Sgblack@eecs.umich.edu 6634166Sgblack@eecs.umich.edu// num_processes++; 6644166Sgblack@eecs.umich.edu} 6655956Sgblack@eecs.umich.edu 6665956Sgblack@eecs.umich.eduvoid 6675956Sgblack@eecs.umich.eduX86_64LiveProcess::argsInit(int intSize, int pageSize) 6685956Sgblack@eecs.umich.edu{ 6695973Sgblack@eecs.umich.edu std::vector<AuxVector<uint64_t> > extraAuxvs; 6707073Sgblack@eecs.umich.edu extraAuxvs.push_back(AuxVector<uint64_t>(M5_AT_SYSINFO_EHDR, 6717073Sgblack@eecs.umich.edu vsyscallPage.base)); 6725973Sgblack@eecs.umich.edu X86LiveProcess::argsInit<uint64_t>(pageSize, extraAuxvs); 6735956Sgblack@eecs.umich.edu} 6745956Sgblack@eecs.umich.edu 6755956Sgblack@eecs.umich.eduvoid 6765956Sgblack@eecs.umich.eduI386LiveProcess::argsInit(int intSize, int pageSize) 6775956Sgblack@eecs.umich.edu{ 6785973Sgblack@eecs.umich.edu std::vector<AuxVector<uint32_t> > extraAuxvs; 6795973Sgblack@eecs.umich.edu //Tell the binary where the vsyscall part of the vsyscall page is. 6807073Sgblack@eecs.umich.edu extraAuxvs.push_back(AuxVector<uint32_t>(M5_AT_SYSINFO, 6815973Sgblack@eecs.umich.edu vsyscallPage.base + vsyscallPage.vsyscallOffset)); 6827073Sgblack@eecs.umich.edu extraAuxvs.push_back(AuxVector<uint32_t>(M5_AT_SYSINFO_EHDR, 6837073Sgblack@eecs.umich.edu vsyscallPage.base)); 6845973Sgblack@eecs.umich.edu X86LiveProcess::argsInit<uint32_t>(pageSize, extraAuxvs); 6855956Sgblack@eecs.umich.edu} 6865958Sgblack@eecs.umich.edu 6875958Sgblack@eecs.umich.eduvoid 6885958Sgblack@eecs.umich.eduX86LiveProcess::setSyscallReturn(ThreadContext *tc, SyscallReturn return_value) 6895958Sgblack@eecs.umich.edu{ 6905958Sgblack@eecs.umich.edu tc->setIntReg(INTREG_RAX, return_value.value()); 6915958Sgblack@eecs.umich.edu} 6925958Sgblack@eecs.umich.edu 6935958Sgblack@eecs.umich.eduX86ISA::IntReg 6946701Sgblack@eecs.umich.eduX86_64LiveProcess::getSyscallArg(ThreadContext *tc, int &i) 6955958Sgblack@eecs.umich.edu{ 6965958Sgblack@eecs.umich.edu assert(i < NumArgumentRegs); 6976701Sgblack@eecs.umich.edu return tc->readIntReg(ArgumentReg[i++]); 6985958Sgblack@eecs.umich.edu} 6995958Sgblack@eecs.umich.edu 7005958Sgblack@eecs.umich.eduvoid 7015958Sgblack@eecs.umich.eduX86_64LiveProcess::setSyscallArg(ThreadContext *tc, int i, X86ISA::IntReg val) 7025958Sgblack@eecs.umich.edu{ 7035958Sgblack@eecs.umich.edu assert(i < NumArgumentRegs); 7045958Sgblack@eecs.umich.edu return tc->setIntReg(ArgumentReg[i], val); 7055958Sgblack@eecs.umich.edu} 7065958Sgblack@eecs.umich.edu 7075958Sgblack@eecs.umich.eduX86ISA::IntReg 7086701Sgblack@eecs.umich.eduI386LiveProcess::getSyscallArg(ThreadContext *tc, int &i) 7095958Sgblack@eecs.umich.edu{ 7105959Sgblack@eecs.umich.edu assert(i < NumArgumentRegs32); 7116701Sgblack@eecs.umich.edu return tc->readIntReg(ArgumentReg32[i++]); 7126701Sgblack@eecs.umich.edu} 7136701Sgblack@eecs.umich.edu 7146701Sgblack@eecs.umich.eduX86ISA::IntReg 7156701Sgblack@eecs.umich.eduI386LiveProcess::getSyscallArg(ThreadContext *tc, int &i, int width) 7166701Sgblack@eecs.umich.edu{ 7176701Sgblack@eecs.umich.edu assert(width == 32 || width == 64); 7186701Sgblack@eecs.umich.edu assert(i < NumArgumentRegs); 7196701Sgblack@eecs.umich.edu uint64_t retVal = tc->readIntReg(ArgumentReg32[i++]) & mask(32); 7206701Sgblack@eecs.umich.edu if (width == 64) 7216701Sgblack@eecs.umich.edu retVal |= ((uint64_t)tc->readIntReg(ArgumentReg[i++]) << 32); 7226701Sgblack@eecs.umich.edu return retVal; 7235958Sgblack@eecs.umich.edu} 7245958Sgblack@eecs.umich.edu 7255958Sgblack@eecs.umich.eduvoid 7265958Sgblack@eecs.umich.eduI386LiveProcess::setSyscallArg(ThreadContext *tc, int i, X86ISA::IntReg val) 7275958Sgblack@eecs.umich.edu{ 7285959Sgblack@eecs.umich.edu assert(i < NumArgumentRegs); 7295959Sgblack@eecs.umich.edu return tc->setIntReg(ArgumentReg[i], val); 7305958Sgblack@eecs.umich.edu} 731