2 * Copyright (c) 2007 The Hewlett-Packard Development Company
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder. You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
14 * Copyright (c) 2003-2006 The Regents of The University of Michigan
15 * All rights reserved.
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions are
19 * met: redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer;
21 * redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution;
24 * neither the name of the copyright holders nor the names of its
25 * contributors may be used to endorse or promote products derived from
26 * this software without specific prior written permission.
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
44 #include "arch/x86/regs/misc.hh"
45 #include "arch/x86/regs/segment.hh"
46 #include "arch/x86/isa_traits.hh"
47 #include "arch/x86/process.hh"
48 #include "arch/x86/types.hh"
49 #include "base/loader/elf_object.hh"
50 #include "base/loader/object_file.hh"
51 #include "base/misc.hh"
52 #include "base/trace.hh"
53 #include "cpu/thread_context.hh"
54 #include "debug/Stack.hh"
55 #include "mem/page_table.hh"
56 #include "mem/translating_port.hh"
57 #include "sim/process_impl.hh"
58 #include "sim/syscall_emul.hh"
59 #include "sim/system.hh"
62 using namespace X86ISA
;
64 static const int ArgumentReg
[] = {
68 //This argument register is r10 for syscalls and rcx for C.
74 static const int NumArgumentRegs
= sizeof(ArgumentReg
) / sizeof(const int);
75 static const int ArgumentReg32
[] = {
82 static const int NumArgumentRegs32
= sizeof(ArgumentReg
) / sizeof(const int);
84 X86LiveProcess::X86LiveProcess(LiveProcessParams
* params
, ObjectFile
*objFile
,
85 SyscallDesc
*_syscallDescs
, int _numSyscallDescs
) :
86 LiveProcess(params
, objFile
), syscallDescs(_syscallDescs
),
87 numSyscallDescs(_numSyscallDescs
)
89 brk_point
= objFile
->dataBase() + objFile
->dataSize() + objFile
->bssSize();
90 brk_point
= roundUp(brk_point
, VMPageSize
);
93 X86_64LiveProcess::X86_64LiveProcess(LiveProcessParams
*params
,
94 ObjectFile
*objFile
, SyscallDesc
*_syscallDescs
,
95 int _numSyscallDescs
) :
96 X86LiveProcess(params
, objFile
, _syscallDescs
, _numSyscallDescs
)
99 vsyscallPage
.base
= 0xffffffffff600000ULL
;
100 vsyscallPage
.size
= VMPageSize
;
101 vsyscallPage
.vtimeOffset
= 0x400;
102 vsyscallPage
.vgettimeofdayOffset
= 0x410;
104 // Set up stack. On X86_64 Linux, stack goes from the top of memory
105 // downward, less the hole for the kernel address space plus one page
106 // for undertermined purposes.
107 stack_base
= (Addr
)0x7FFFFFFFF000ULL
;
109 // Set pointer for next thread stack. Reserve 8M for main stack.
110 next_thread_stack_base
= stack_base
- (8 * 1024 * 1024);
112 // Set up region for mmaps. This was determined empirically and may not
113 // always be correct.
114 mmap_start
= mmap_end
= (Addr
)0x2aaaaaaab000ULL
;
118 I386LiveProcess::syscall(int64_t callnum
, ThreadContext
*tc
)
120 TheISA::PCState pc
= tc
->pcState();
122 if (eip
>= vsyscallPage
.base
&&
123 eip
< vsyscallPage
.base
+ vsyscallPage
.size
) {
124 pc
.npc(vsyscallPage
.base
+ vsyscallPage
.vsysexitOffset
);
127 X86LiveProcess::syscall(callnum
, tc
);
131 I386LiveProcess::I386LiveProcess(LiveProcessParams
*params
,
132 ObjectFile
*objFile
, SyscallDesc
*_syscallDescs
,
133 int _numSyscallDescs
) :
134 X86LiveProcess(params
, objFile
, _syscallDescs
, _numSyscallDescs
)
136 _gdtStart
= ULL(0x100000000);
137 _gdtSize
= VMPageSize
;
139 vsyscallPage
.base
= 0xffffe000ULL
;
140 vsyscallPage
.size
= VMPageSize
;
141 vsyscallPage
.vsyscallOffset
= 0x400;
142 vsyscallPage
.vsysexitOffset
= 0x410;
144 stack_base
= vsyscallPage
.base
;
146 // Set pointer for next thread stack. Reserve 8M for main stack.
147 next_thread_stack_base
= stack_base
- (8 * 1024 * 1024);
149 // Set up region for mmaps. This was determined empirically and may not
150 // always be correct.
151 mmap_start
= mmap_end
= (Addr
)0xf7ffe000ULL
;
155 X86LiveProcess::getDesc(int callnum
)
157 if (callnum
< 0 || callnum
>= numSyscallDescs
)
159 return &syscallDescs
[callnum
];
163 X86_64LiveProcess::initState()
165 X86LiveProcess::initState();
167 argsInit(sizeof(uint64_t), VMPageSize
);
169 // Set up the vsyscall page for this process.
170 allocateMem(vsyscallPage
.base
, vsyscallPage
.size
);
171 uint8_t vtimeBlob
[] = {
172 0x48,0xc7,0xc0,0xc9,0x00,0x00,0x00, // mov $0xc9,%rax
173 0x0f,0x05, // syscall
176 initVirtMem
->writeBlob(vsyscallPage
.base
+ vsyscallPage
.vtimeOffset
,
177 vtimeBlob
, sizeof(vtimeBlob
));
179 uint8_t vgettimeofdayBlob
[] = {
180 0x48,0xc7,0xc0,0x60,0x00,0x00,0x00, // mov $0x60,%rax
181 0x0f,0x05, // syscall
184 initVirtMem
->writeBlob(vsyscallPage
.base
+ vsyscallPage
.vgettimeofdayOffset
,
185 vgettimeofdayBlob
, sizeof(vgettimeofdayBlob
));
187 for (int i
= 0; i
< contextIds
.size(); i
++) {
188 ThreadContext
* tc
= system
->getThreadContext(contextIds
[i
]);
190 SegAttr dataAttr
= 0;
192 dataAttr
.unusable
= 0;
193 dataAttr
.defaultSize
= 1;
194 dataAttr
.longMode
= 1;
196 dataAttr
.granularity
= 1;
197 dataAttr
.present
= 1;
199 dataAttr
.writable
= 1;
200 dataAttr
.readable
= 1;
201 dataAttr
.expandDown
= 0;
204 //Initialize the segment registers.
205 for(int seg
= 0; seg
< NUM_SEGMENTREGS
; seg
++) {
206 tc
->setMiscRegNoEffect(MISCREG_SEG_BASE(seg
), 0);
207 tc
->setMiscRegNoEffect(MISCREG_SEG_EFF_BASE(seg
), 0);
208 tc
->setMiscRegNoEffect(MISCREG_SEG_ATTR(seg
), dataAttr
);
214 csAttr
.defaultSize
= 0;
217 csAttr
.granularity
= 1;
222 csAttr
.expandDown
= 0;
225 tc
->setMiscRegNoEffect(MISCREG_CS_ATTR
, csAttr
);
228 efer
.sce
= 1; // Enable system call extensions.
229 efer
.lme
= 1; // Enable long mode.
230 efer
.lma
= 1; // Activate long mode.
231 efer
.nxe
= 1; // Enable nx support.
232 efer
.svme
= 0; // Disable svm support for now. It isn't implemented.
233 efer
.ffxsr
= 1; // Turn on fast fxsave and fxrstor.
234 tc
->setMiscReg(MISCREG_EFER
, efer
);
236 //Set up the registers that describe the operating mode.
238 cr0
.pg
= 1; // Turn on paging.
239 cr0
.cd
= 0; // Don't disable caching.
240 cr0
.nw
= 0; // This is bit is defined to be ignored.
241 cr0
.am
= 0; // No alignment checking
242 cr0
.wp
= 0; // Supervisor mode can write read only pages
244 cr0
.et
= 1; // This should always be 1
245 cr0
.ts
= 0; // We don't do task switching, so causing fp exceptions
246 // would be pointless.
247 cr0
.em
= 0; // Allow x87 instructions to execute natively.
248 cr0
.mp
= 1; // This doesn't really matter, but the manual suggests
249 // setting it to one.
250 cr0
.pe
= 1; // We're definitely in protected mode.
251 tc
->setMiscReg(MISCREG_CR0
, cr0
);
253 tc
->setMiscReg(MISCREG_MXCSR
, 0x1f80);
258 I386LiveProcess::initState()
260 X86LiveProcess::initState();
262 argsInit(sizeof(uint32_t), VMPageSize
);
265 * Set up a GDT for this process. The whole GDT wouldn't really be for
266 * this process, but the only parts we care about are.
268 allocateMem(_gdtStart
, _gdtSize
);
270 assert(_gdtSize
% sizeof(zero
) == 0);
271 for (Addr gdtCurrent
= _gdtStart
;
272 gdtCurrent
< _gdtStart
+ _gdtSize
; gdtCurrent
+= sizeof(zero
)) {
273 initVirtMem
->write(gdtCurrent
, zero
);
276 // Set up the vsyscall page for this process.
277 allocateMem(vsyscallPage
.base
, vsyscallPage
.size
);
278 uint8_t vsyscallBlob
[] = {
282 0x89, 0xe5, // mov %esp, %ebp
283 0x0f, 0x34 // sysenter
285 initVirtMem
->writeBlob(vsyscallPage
.base
+ vsyscallPage
.vsyscallOffset
,
286 vsyscallBlob
, sizeof(vsyscallBlob
));
288 uint8_t vsysexitBlob
[] = {
294 initVirtMem
->writeBlob(vsyscallPage
.base
+ vsyscallPage
.vsysexitOffset
,
295 vsysexitBlob
, sizeof(vsysexitBlob
));
297 for (int i
= 0; i
< contextIds
.size(); i
++) {
298 ThreadContext
* tc
= system
->getThreadContext(contextIds
[i
]);
300 SegAttr dataAttr
= 0;
302 dataAttr
.unusable
= 0;
303 dataAttr
.defaultSize
= 1;
304 dataAttr
.longMode
= 0;
306 dataAttr
.granularity
= 1;
307 dataAttr
.present
= 1;
309 dataAttr
.writable
= 1;
310 dataAttr
.readable
= 1;
311 dataAttr
.expandDown
= 0;
314 //Initialize the segment registers.
315 for(int seg
= 0; seg
< NUM_SEGMENTREGS
; seg
++) {
316 tc
->setMiscRegNoEffect(MISCREG_SEG_BASE(seg
), 0);
317 tc
->setMiscRegNoEffect(MISCREG_SEG_EFF_BASE(seg
), 0);
318 tc
->setMiscRegNoEffect(MISCREG_SEG_ATTR(seg
), dataAttr
);
319 tc
->setMiscRegNoEffect(MISCREG_SEG_SEL(seg
), 0xB);
320 tc
->setMiscRegNoEffect(MISCREG_SEG_LIMIT(seg
), (uint32_t)(-1));
326 csAttr
.defaultSize
= 1;
329 csAttr
.granularity
= 1;
334 csAttr
.expandDown
= 0;
337 tc
->setMiscRegNoEffect(MISCREG_CS_ATTR
, csAttr
);
339 tc
->setMiscRegNoEffect(MISCREG_TSG_BASE
, _gdtStart
);
340 tc
->setMiscRegNoEffect(MISCREG_TSG_EFF_BASE
, _gdtStart
);
341 tc
->setMiscRegNoEffect(MISCREG_TSG_LIMIT
, _gdtStart
+ _gdtSize
- 1);
343 // Set the LDT selector to 0 to deactivate it.
344 tc
->setMiscRegNoEffect(MISCREG_TSL
, 0);
347 efer
.sce
= 1; // Enable system call extensions.
348 efer
.lme
= 1; // Enable long mode.
349 efer
.lma
= 0; // Deactivate long mode.
350 efer
.nxe
= 1; // Enable nx support.
351 efer
.svme
= 0; // Disable svm support for now. It isn't implemented.
352 efer
.ffxsr
= 1; // Turn on fast fxsave and fxrstor.
353 tc
->setMiscReg(MISCREG_EFER
, efer
);
355 //Set up the registers that describe the operating mode.
357 cr0
.pg
= 1; // Turn on paging.
358 cr0
.cd
= 0; // Don't disable caching.
359 cr0
.nw
= 0; // This is bit is defined to be ignored.
360 cr0
.am
= 0; // No alignment checking
361 cr0
.wp
= 0; // Supervisor mode can write read only pages
363 cr0
.et
= 1; // This should always be 1
364 cr0
.ts
= 0; // We don't do task switching, so causing fp exceptions
365 // would be pointless.
366 cr0
.em
= 0; // Allow x87 instructions to execute natively.
367 cr0
.mp
= 1; // This doesn't really matter, but the manual suggests
368 // setting it to one.
369 cr0
.pe
= 1; // We're definitely in protected mode.
370 tc
->setMiscReg(MISCREG_CR0
, cr0
);
372 tc
->setMiscReg(MISCREG_MXCSR
, 0x1f80);
376 template<class IntType
>
378 X86LiveProcess::argsInit(int pageSize
,
379 std::vector
<AuxVector
<IntType
> > extraAuxvs
)
381 int intSize
= sizeof(IntType
);
383 typedef AuxVector
<IntType
> auxv_t
;
384 std::vector
<auxv_t
> auxv
= extraAuxvs
;
392 //We want 16 byte alignment
395 // load object file into target memory
396 objFile
->loadSections(initVirtMem
);
399 X86_OnboardFPU
= 1 << 0,
400 X86_VirtualModeExtensions
= 1 << 1,
401 X86_DebuggingExtensions
= 1 << 2,
402 X86_PageSizeExtensions
= 1 << 3,
404 X86_TimeStampCounter
= 1 << 4,
405 X86_ModelSpecificRegisters
= 1 << 5,
406 X86_PhysicalAddressExtensions
= 1 << 6,
407 X86_MachineCheckExtensions
= 1 << 7,
409 X86_CMPXCHG8Instruction
= 1 << 8,
410 X86_OnboardAPIC
= 1 << 9,
411 X86_SYSENTER_SYSEXIT
= 1 << 11,
413 X86_MemoryTypeRangeRegisters
= 1 << 12,
414 X86_PageGlobalEnable
= 1 << 13,
415 X86_MachineCheckArchitecture
= 1 << 14,
416 X86_CMOVInstruction
= 1 << 15,
418 X86_PageAttributeTable
= 1 << 16,
419 X86_36BitPSEs
= 1 << 17,
420 X86_ProcessorSerialNumber
= 1 << 18,
421 X86_CLFLUSHInstruction
= 1 << 19,
423 X86_DebugTraceStore
= 1 << 21,
424 X86_ACPIViaMSR
= 1 << 22,
425 X86_MultimediaExtensions
= 1 << 23,
427 X86_FXSAVE_FXRSTOR
= 1 << 24,
428 X86_StreamingSIMDExtensions
= 1 << 25,
429 X86_StreamingSIMDExtensions2
= 1 << 26,
430 X86_CPUSelfSnoop
= 1 << 27,
432 X86_HyperThreading
= 1 << 28,
433 X86_AutomaticClockControl
= 1 << 29,
434 X86_IA64Processor
= 1 << 30
437 //Setup the auxilliary vectors. These will already have endian conversion.
438 //Auxilliary vectors are loaded only for elf formatted executables.
439 ElfObject
* elfObject
= dynamic_cast<ElfObject
*>(objFile
);
444 X86_VirtualModeExtensions
|
445 X86_DebuggingExtensions
|
446 X86_PageSizeExtensions
|
447 X86_TimeStampCounter
|
448 X86_ModelSpecificRegisters
|
449 X86_PhysicalAddressExtensions
|
450 X86_MachineCheckExtensions
|
451 X86_CMPXCHG8Instruction
|
453 X86_SYSENTER_SYSEXIT
|
454 X86_MemoryTypeRangeRegisters
|
455 X86_PageGlobalEnable
|
456 X86_MachineCheckArchitecture
|
457 X86_CMOVInstruction
|
458 X86_PageAttributeTable
|
460 // X86_ProcessorSerialNumber |
461 X86_CLFLUSHInstruction
|
462 // X86_DebugTraceStore |
464 X86_MultimediaExtensions
|
466 X86_StreamingSIMDExtensions
|
467 X86_StreamingSIMDExtensions2
|
468 // X86_CPUSelfSnoop |
469 // X86_HyperThreading |
470 // X86_AutomaticClockControl |
471 // X86_IA64Processor |
474 //Bits which describe the system hardware capabilities
475 //XXX Figure out what these should be
476 auxv
.push_back(auxv_t(M5_AT_HWCAP
, features
));
477 //The system page size
478 auxv
.push_back(auxv_t(M5_AT_PAGESZ
, X86ISA::VMPageSize
));
479 //Frequency at which times() increments
480 //Defined to be 100 in the kernel source.
481 auxv
.push_back(auxv_t(M5_AT_CLKTCK
, 100));
482 // For statically linked executables, this is the virtual address of the
483 // program header tables if they appear in the executable image
484 auxv
.push_back(auxv_t(M5_AT_PHDR
, elfObject
->programHeaderTable()));
485 // This is the size of a program header entry from the elf file.
486 auxv
.push_back(auxv_t(M5_AT_PHENT
, elfObject
->programHeaderSize()));
487 // This is the number of program headers from the original elf file.
488 auxv
.push_back(auxv_t(M5_AT_PHNUM
, elfObject
->programHeaderCount()));
489 //This is the address of the elf "interpreter", It should be set
490 //to 0 for regular executables. It should be something else
491 //(not sure what) for dynamic libraries.
492 auxv
.push_back(auxv_t(M5_AT_BASE
, 0));
494 //XXX Figure out what this should be.
495 auxv
.push_back(auxv_t(M5_AT_FLAGS
, 0));
496 //The entry point to the program
497 auxv
.push_back(auxv_t(M5_AT_ENTRY
, objFile
->entryPoint()));
498 //Different user and group IDs
499 auxv
.push_back(auxv_t(M5_AT_UID
, uid()));
500 auxv
.push_back(auxv_t(M5_AT_EUID
, euid()));
501 auxv
.push_back(auxv_t(M5_AT_GID
, gid()));
502 auxv
.push_back(auxv_t(M5_AT_EGID
, egid()));
503 //Whether to enable "secure mode" in the executable
504 auxv
.push_back(auxv_t(M5_AT_SECURE
, 0));
505 //The address of 16 "random" bytes.
506 auxv
.push_back(auxv_t(M5_AT_RANDOM
, 0));
507 //The name of the program
508 auxv
.push_back(auxv_t(M5_AT_EXECFN
, 0));
509 //The platform string
510 auxv
.push_back(auxv_t(M5_AT_PLATFORM
, 0));
513 //Figure out how big the initial stack needs to be
515 // A sentry NULL void pointer at the top of the stack.
516 int sentry_size
= intSize
;
518 //This is the name of the file which is present on the initial stack
519 //It's purpose is to let the user space linker examine the original file.
520 int file_name_size
= filename
.size() + 1;
522 const int numRandomBytes
= 16;
523 int aux_data_size
= numRandomBytes
;
525 string platform
= "x86_64";
526 aux_data_size
+= platform
.size() + 1;
528 int env_data_size
= 0;
529 for (int i
= 0; i
< envp
.size(); ++i
) {
530 env_data_size
+= envp
[i
].size() + 1;
532 int arg_data_size
= 0;
533 for (int i
= 0; i
< argv
.size(); ++i
) {
534 arg_data_size
+= argv
[i
].size() + 1;
537 //The info_block needs to be padded so it's size is a multiple of the
538 //alignment mask. Also, it appears that there needs to be at least some
539 //padding, so if the size is already a multiple, we need to increase it
541 int base_info_block_size
=
542 sentry_size
+ file_name_size
+ env_data_size
+ arg_data_size
;
544 int info_block_size
= roundUp(base_info_block_size
, align
);
546 int info_block_padding
= info_block_size
- base_info_block_size
;
548 //Each auxilliary vector is two 8 byte words
549 int aux_array_size
= intSize
* 2 * (auxv
.size() + 1);
551 int envp_array_size
= intSize
* (envp
.size() + 1);
552 int argv_array_size
= intSize
* (argv
.size() + 1);
554 int argc_size
= intSize
;
556 //Figure out the size of the contents of the actual initial frame
563 //There needs to be padding after the auxiliary vector data so that the
564 //very bottom of the stack is aligned properly.
565 int partial_size
= frame_size
+ aux_data_size
;
566 int aligned_partial_size
= roundUp(partial_size
, align
);
567 int aux_padding
= aligned_partial_size
- partial_size
;
575 stack_min
= stack_base
- space_needed
;
576 stack_min
= roundDown(stack_min
, align
);
577 stack_size
= stack_base
- stack_min
;
580 allocateMem(roundDown(stack_min
, pageSize
), roundUp(stack_size
, pageSize
));
582 // map out initial stack contents
583 IntType sentry_base
= stack_base
- sentry_size
;
584 IntType file_name_base
= sentry_base
- file_name_size
;
585 IntType env_data_base
= file_name_base
- env_data_size
;
586 IntType arg_data_base
= env_data_base
- arg_data_size
;
587 IntType aux_data_base
= arg_data_base
- info_block_padding
- aux_data_size
;
588 IntType auxv_array_base
= aux_data_base
- aux_array_size
- aux_padding
;
589 IntType envp_array_base
= auxv_array_base
- envp_array_size
;
590 IntType argv_array_base
= envp_array_base
- argv_array_size
;
591 IntType argc_base
= argv_array_base
- argc_size
;
593 DPRINTF(Stack
, "The addresses of items on the initial stack:\n");
594 DPRINTF(Stack
, "0x%x - file name\n", file_name_base
);
595 DPRINTF(Stack
, "0x%x - env data\n", env_data_base
);
596 DPRINTF(Stack
, "0x%x - arg data\n", arg_data_base
);
597 DPRINTF(Stack
, "0x%x - aux data\n", aux_data_base
);
598 DPRINTF(Stack
, "0x%x - auxv array\n", auxv_array_base
);
599 DPRINTF(Stack
, "0x%x - envp array\n", envp_array_base
);
600 DPRINTF(Stack
, "0x%x - argv array\n", argv_array_base
);
601 DPRINTF(Stack
, "0x%x - argc \n", argc_base
);
602 DPRINTF(Stack
, "0x%x - stack min\n", stack_min
);
604 // write contents to stack
607 IntType argc
= argv
.size();
608 IntType guestArgc
= X86ISA::htog(argc
);
610 //Write out the sentry void *
611 IntType sentry_NULL
= 0;
612 initVirtMem
->writeBlob(sentry_base
,
613 (uint8_t*)&sentry_NULL
, sentry_size
);
615 //Write the file name
616 initVirtMem
->writeString(file_name_base
, filename
.c_str());
618 //Fix up the aux vectors which point to data
619 assert(auxv
[auxv
.size() - 3].a_type
== M5_AT_RANDOM
);
620 auxv
[auxv
.size() - 3].a_val
= aux_data_base
;
621 assert(auxv
[auxv
.size() - 2].a_type
== M5_AT_EXECFN
);
622 auxv
[auxv
.size() - 2].a_val
= argv_array_base
;
623 assert(auxv
[auxv
.size() - 1].a_type
== M5_AT_PLATFORM
);
624 auxv
[auxv
.size() - 1].a_val
= aux_data_base
+ numRandomBytes
;
627 for(int x
= 0; x
< auxv
.size(); x
++)
629 initVirtMem
->writeBlob(auxv_array_base
+ x
* 2 * intSize
,
630 (uint8_t*)&(auxv
[x
].a_type
), intSize
);
631 initVirtMem
->writeBlob(auxv_array_base
+ (x
* 2 + 1) * intSize
,
632 (uint8_t*)&(auxv
[x
].a_val
), intSize
);
634 //Write out the terminating zeroed auxilliary vector
635 const uint64_t zero
= 0;
636 initVirtMem
->writeBlob(auxv_array_base
+ 2 * intSize
* auxv
.size(),
637 (uint8_t*)&zero
, 2 * intSize
);
639 initVirtMem
->writeString(aux_data_base
, platform
.c_str());
641 copyStringArray(envp
, envp_array_base
, env_data_base
, initVirtMem
);
642 copyStringArray(argv
, argv_array_base
, arg_data_base
, initVirtMem
);
644 initVirtMem
->writeBlob(argc_base
, (uint8_t*)&guestArgc
, intSize
);
646 ThreadContext
*tc
= system
->getThreadContext(contextIds
[0]);
647 //Set the stack pointer register
648 tc
->setIntReg(StackPointerReg
, stack_min
);
650 // There doesn't need to be any segment base added in since we're dealing
651 // with the flat segmentation model.
652 tc
->pcState(objFile
->entryPoint());
654 //Align the "stack_min" to a page boundary.
655 stack_min
= roundDown(stack_min
, pageSize
);
661 X86_64LiveProcess::argsInit(int intSize
, int pageSize
)
663 std::vector
<AuxVector
<uint64_t> > extraAuxvs
;
664 extraAuxvs
.push_back(AuxVector
<uint64_t>(M5_AT_SYSINFO_EHDR
,
666 X86LiveProcess::argsInit
<uint64_t>(pageSize
, extraAuxvs
);
670 I386LiveProcess::argsInit(int intSize
, int pageSize
)
672 std::vector
<AuxVector
<uint32_t> > extraAuxvs
;
673 //Tell the binary where the vsyscall part of the vsyscall page is.
674 extraAuxvs
.push_back(AuxVector
<uint32_t>(M5_AT_SYSINFO
,
675 vsyscallPage
.base
+ vsyscallPage
.vsyscallOffset
));
676 extraAuxvs
.push_back(AuxVector
<uint32_t>(M5_AT_SYSINFO_EHDR
,
678 X86LiveProcess::argsInit
<uint32_t>(pageSize
, extraAuxvs
);
682 X86LiveProcess::setSyscallReturn(ThreadContext
*tc
, SyscallReturn return_value
)
684 tc
->setIntReg(INTREG_RAX
, return_value
.value());
688 X86_64LiveProcess::getSyscallArg(ThreadContext
*tc
, int &i
)
690 assert(i
< NumArgumentRegs
);
691 return tc
->readIntReg(ArgumentReg
[i
++]);
695 X86_64LiveProcess::setSyscallArg(ThreadContext
*tc
, int i
, X86ISA::IntReg val
)
697 assert(i
< NumArgumentRegs
);
698 return tc
->setIntReg(ArgumentReg
[i
], val
);
702 I386LiveProcess::getSyscallArg(ThreadContext
*tc
, int &i
)
704 assert(i
< NumArgumentRegs32
);
705 return tc
->readIntReg(ArgumentReg32
[i
++]);
709 I386LiveProcess::getSyscallArg(ThreadContext
*tc
, int &i
, int width
)
711 assert(width
== 32 || width
== 64);
712 assert(i
< NumArgumentRegs
);
713 uint64_t retVal
= tc
->readIntReg(ArgumentReg32
[i
++]) & mask(32);
715 retVal
|= ((uint64_t)tc
->readIntReg(ArgumentReg
[i
++]) << 32);
720 I386LiveProcess::setSyscallArg(ThreadContext
*tc
, int i
, X86ISA::IntReg val
)
722 assert(i
< NumArgumentRegs
);
723 return tc
->setIntReg(ArgumentReg
[i
], val
);