2 * Copyright (c) 2003-2006 The Regents of The University of Michigan
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
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9 * redistributions in binary form must reproduce the above copyright
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21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 * Copyright (c) 2007 The Hewlett-Packard Development Company
34 * All rights reserved.
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41 * use which is NOT directed to receiving any direct monetary
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71 * notice to acknowledge the contribution from this software where
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79 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
80 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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89 #include "arch/x86/isa_traits.hh"
90 #include "arch/x86/miscregs.hh"
91 #include "arch/x86/process.hh"
92 #include "arch/x86/segmentregs.hh"
93 #include "arch/x86/types.hh"
94 #include "base/loader/object_file.hh"
95 #include "base/loader/elf_object.hh"
96 #include "base/misc.hh"
97 #include "base/trace.hh"
98 #include "cpu/thread_context.hh"
99 #include "mem/page_table.hh"
100 #include "mem/translating_port.hh"
101 #include "sim/process_impl.hh"
102 #include "sim/syscall_emul.hh"
103 #include "sim/system.hh"
106 using namespace X86ISA
;
108 static const int ArgumentReg
[] = {
112 //This argument register is r10 for syscalls and rcx for C.
118 static const int NumArgumentRegs
= sizeof(ArgumentReg
) / sizeof(const int);
119 static const int ArgumentReg32
[] = {
126 static const int NumArgumentRegs32
= sizeof(ArgumentReg
) / sizeof(const int);
128 X86LiveProcess::X86LiveProcess(LiveProcessParams
* params
, ObjectFile
*objFile
,
129 SyscallDesc
*_syscallDescs
, int _numSyscallDescs
) :
130 LiveProcess(params
, objFile
), syscallDescs(_syscallDescs
),
131 numSyscallDescs(_numSyscallDescs
)
133 brk_point
= objFile
->dataBase() + objFile
->dataSize() + objFile
->bssSize();
134 brk_point
= roundUp(brk_point
, VMPageSize
);
137 X86_64LiveProcess::X86_64LiveProcess(LiveProcessParams
*params
,
138 ObjectFile
*objFile
, SyscallDesc
*_syscallDescs
,
139 int _numSyscallDescs
) :
140 X86LiveProcess(params
, objFile
, _syscallDescs
, _numSyscallDescs
)
143 vsyscallPage
.base
= 0xffffffffff600000ULL
;
144 vsyscallPage
.size
= VMPageSize
;
145 vsyscallPage
.vtimeOffset
= 0x400;
146 vsyscallPage
.vgettimeofdayOffset
= 0x410;
148 // Set up stack. On X86_64 Linux, stack goes from the top of memory
149 // downward, less the hole for the kernel address space plus one page
150 // for undertermined purposes.
151 stack_base
= (Addr
)0x7FFFFFFFF000ULL
;
153 // Set pointer for next thread stack. Reserve 8M for main stack.
154 next_thread_stack_base
= stack_base
- (8 * 1024 * 1024);
156 // Set up region for mmaps. This was determined empirically and may not
157 // always be correct.
158 mmap_start
= mmap_end
= (Addr
)0x2aaaaaaab000ULL
;
162 I386LiveProcess::syscall(int64_t callnum
, ThreadContext
*tc
)
164 Addr eip
= tc
->readPC();
165 if (eip
>= vsyscallPage
.base
&&
166 eip
< vsyscallPage
.base
+ vsyscallPage
.size
) {
167 tc
->setNextPC(vsyscallPage
.base
+ vsyscallPage
.vsysexitOffset
);
169 X86LiveProcess::syscall(callnum
, tc
);
173 I386LiveProcess::I386LiveProcess(LiveProcessParams
*params
,
174 ObjectFile
*objFile
, SyscallDesc
*_syscallDescs
,
175 int _numSyscallDescs
) :
176 X86LiveProcess(params
, objFile
, _syscallDescs
, _numSyscallDescs
)
178 _gdtStart
= ULL(0x100000000);
179 _gdtSize
= VMPageSize
;
181 vsyscallPage
.base
= 0xffffe000ULL
;
182 vsyscallPage
.size
= VMPageSize
;
183 vsyscallPage
.vsyscallOffset
= 0x400;
184 vsyscallPage
.vsysexitOffset
= 0x410;
186 stack_base
= vsyscallPage
.base
;
188 // Set pointer for next thread stack. Reserve 8M for main stack.
189 next_thread_stack_base
= stack_base
- (8 * 1024 * 1024);
191 // Set up region for mmaps. This was determined empirically and may not
192 // always be correct.
193 mmap_start
= mmap_end
= (Addr
)0xf7ffe000ULL
;
197 X86LiveProcess::getDesc(int callnum
)
199 if (callnum
< 0 || callnum
>= numSyscallDescs
)
201 return &syscallDescs
[callnum
];
205 X86_64LiveProcess::startup()
207 LiveProcess::startup();
209 if (checkpointRestored
)
212 argsInit(sizeof(uint64_t), VMPageSize
);
214 // Set up the vsyscall page for this process.
215 pTable
->allocate(vsyscallPage
.base
, vsyscallPage
.size
);
216 uint8_t vtimeBlob
[] = {
217 0x48,0xc7,0xc0,0xc9,0x00,0x00,0x00, // mov $0xc9,%rax
218 0x0f,0x05, // syscall
221 initVirtMem
->writeBlob(vsyscallPage
.base
+ vsyscallPage
.vtimeOffset
,
222 vtimeBlob
, sizeof(vtimeBlob
));
224 uint8_t vgettimeofdayBlob
[] = {
225 0x48,0xc7,0xc0,0x60,0x00,0x00,0x00, // mov $0x60,%rax
226 0x0f,0x05, // syscall
229 initVirtMem
->writeBlob(vsyscallPage
.base
+ vsyscallPage
.vgettimeofdayOffset
,
230 vgettimeofdayBlob
, sizeof(vgettimeofdayBlob
));
232 for (int i
= 0; i
< contextIds
.size(); i
++) {
233 ThreadContext
* tc
= system
->getThreadContext(contextIds
[i
]);
235 SegAttr dataAttr
= 0;
237 dataAttr
.unusable
= 0;
238 dataAttr
.defaultSize
= 1;
239 dataAttr
.longMode
= 1;
241 dataAttr
.granularity
= 1;
242 dataAttr
.present
= 1;
244 dataAttr
.writable
= 1;
245 dataAttr
.readable
= 1;
246 dataAttr
.expandDown
= 0;
249 //Initialize the segment registers.
250 for(int seg
= 0; seg
< NUM_SEGMENTREGS
; seg
++) {
251 tc
->setMiscRegNoEffect(MISCREG_SEG_BASE(seg
), 0);
252 tc
->setMiscRegNoEffect(MISCREG_SEG_EFF_BASE(seg
), 0);
253 tc
->setMiscRegNoEffect(MISCREG_SEG_ATTR(seg
), dataAttr
);
259 csAttr
.defaultSize
= 0;
262 csAttr
.granularity
= 1;
267 csAttr
.expandDown
= 0;
270 tc
->setMiscRegNoEffect(MISCREG_CS_ATTR
, csAttr
);
273 efer
.sce
= 1; // Enable system call extensions.
274 efer
.lme
= 1; // Enable long mode.
275 efer
.lma
= 1; // Activate long mode.
276 efer
.nxe
= 1; // Enable nx support.
277 efer
.svme
= 0; // Disable svm support for now. It isn't implemented.
278 efer
.ffxsr
= 1; // Turn on fast fxsave and fxrstor.
279 tc
->setMiscReg(MISCREG_EFER
, efer
);
281 //Set up the registers that describe the operating mode.
283 cr0
.pg
= 1; // Turn on paging.
284 cr0
.cd
= 0; // Don't disable caching.
285 cr0
.nw
= 0; // This is bit is defined to be ignored.
286 cr0
.am
= 0; // No alignment checking
287 cr0
.wp
= 0; // Supervisor mode can write read only pages
289 cr0
.et
= 1; // This should always be 1
290 cr0
.ts
= 0; // We don't do task switching, so causing fp exceptions
291 // would be pointless.
292 cr0
.em
= 0; // Allow x87 instructions to execute natively.
293 cr0
.mp
= 1; // This doesn't really matter, but the manual suggests
294 // setting it to one.
295 cr0
.pe
= 1; // We're definitely in protected mode.
296 tc
->setMiscReg(MISCREG_CR0
, cr0
);
298 tc
->setMiscReg(MISCREG_MXCSR
, 0x1f80);
303 I386LiveProcess::startup()
305 LiveProcess::startup();
307 if (checkpointRestored
)
310 argsInit(sizeof(uint32_t), VMPageSize
);
313 * Set up a GDT for this process. The whole GDT wouldn't really be for
314 * this process, but the only parts we care about are.
316 pTable
->allocate(_gdtStart
, _gdtSize
);
318 assert(_gdtSize
% sizeof(zero
) == 0);
319 for (Addr gdtCurrent
= _gdtStart
;
320 gdtCurrent
< _gdtStart
+ _gdtSize
; gdtCurrent
+= sizeof(zero
)) {
321 initVirtMem
->write(gdtCurrent
, zero
);
324 // Set up the vsyscall page for this process.
325 pTable
->allocate(vsyscallPage
.base
, vsyscallPage
.size
);
326 uint8_t vsyscallBlob
[] = {
330 0x89, 0xe5, // mov %esp, %ebp
331 0x0f, 0x34 // sysenter
333 initVirtMem
->writeBlob(vsyscallPage
.base
+ vsyscallPage
.vsyscallOffset
,
334 vsyscallBlob
, sizeof(vsyscallBlob
));
336 uint8_t vsysexitBlob
[] = {
342 initVirtMem
->writeBlob(vsyscallPage
.base
+ vsyscallPage
.vsysexitOffset
,
343 vsysexitBlob
, sizeof(vsysexitBlob
));
345 for (int i
= 0; i
< contextIds
.size(); i
++) {
346 ThreadContext
* tc
= system
->getThreadContext(contextIds
[i
]);
348 SegAttr dataAttr
= 0;
350 dataAttr
.unusable
= 0;
351 dataAttr
.defaultSize
= 1;
352 dataAttr
.longMode
= 0;
354 dataAttr
.granularity
= 1;
355 dataAttr
.present
= 1;
357 dataAttr
.writable
= 1;
358 dataAttr
.readable
= 1;
359 dataAttr
.expandDown
= 0;
362 //Initialize the segment registers.
363 for(int seg
= 0; seg
< NUM_SEGMENTREGS
; seg
++) {
364 tc
->setMiscRegNoEffect(MISCREG_SEG_BASE(seg
), 0);
365 tc
->setMiscRegNoEffect(MISCREG_SEG_EFF_BASE(seg
), 0);
366 tc
->setMiscRegNoEffect(MISCREG_SEG_ATTR(seg
), dataAttr
);
367 tc
->setMiscRegNoEffect(MISCREG_SEG_SEL(seg
), 0xB);
368 tc
->setMiscRegNoEffect(MISCREG_SEG_LIMIT(seg
), (uint32_t)(-1));
374 csAttr
.defaultSize
= 1;
377 csAttr
.granularity
= 1;
382 csAttr
.expandDown
= 0;
385 tc
->setMiscRegNoEffect(MISCREG_CS_ATTR
, csAttr
);
387 tc
->setMiscRegNoEffect(MISCREG_TSG_BASE
, _gdtStart
);
388 tc
->setMiscRegNoEffect(MISCREG_TSG_EFF_BASE
, _gdtStart
);
389 tc
->setMiscRegNoEffect(MISCREG_TSG_LIMIT
, _gdtStart
+ _gdtSize
- 1);
391 // Set the LDT selector to 0 to deactivate it.
392 tc
->setMiscRegNoEffect(MISCREG_TSL
, 0);
395 efer
.sce
= 1; // Enable system call extensions.
396 efer
.lme
= 1; // Enable long mode.
397 efer
.lma
= 0; // Deactivate long mode.
398 efer
.nxe
= 1; // Enable nx support.
399 efer
.svme
= 0; // Disable svm support for now. It isn't implemented.
400 efer
.ffxsr
= 1; // Turn on fast fxsave and fxrstor.
401 tc
->setMiscReg(MISCREG_EFER
, efer
);
403 //Set up the registers that describe the operating mode.
405 cr0
.pg
= 1; // Turn on paging.
406 cr0
.cd
= 0; // Don't disable caching.
407 cr0
.nw
= 0; // This is bit is defined to be ignored.
408 cr0
.am
= 0; // No alignment checking
409 cr0
.wp
= 0; // Supervisor mode can write read only pages
411 cr0
.et
= 1; // This should always be 1
412 cr0
.ts
= 0; // We don't do task switching, so causing fp exceptions
413 // would be pointless.
414 cr0
.em
= 0; // Allow x87 instructions to execute natively.
415 cr0
.mp
= 1; // This doesn't really matter, but the manual suggests
416 // setting it to one.
417 cr0
.pe
= 1; // We're definitely in protected mode.
418 tc
->setMiscReg(MISCREG_CR0
, cr0
);
420 tc
->setMiscReg(MISCREG_MXCSR
, 0x1f80);
424 template<class IntType
>
426 X86LiveProcess::argsInit(int pageSize
,
427 std::vector
<AuxVector
<IntType
> > extraAuxvs
)
429 int intSize
= sizeof(IntType
);
431 typedef AuxVector
<IntType
> auxv_t
;
432 std::vector
<auxv_t
> auxv
= extraAuxvs
;
440 //We want 16 byte alignment
443 // load object file into target memory
444 objFile
->loadSections(initVirtMem
);
447 X86_OnboardFPU
= 1 << 0,
448 X86_VirtualModeExtensions
= 1 << 1,
449 X86_DebuggingExtensions
= 1 << 2,
450 X86_PageSizeExtensions
= 1 << 3,
452 X86_TimeStampCounter
= 1 << 4,
453 X86_ModelSpecificRegisters
= 1 << 5,
454 X86_PhysicalAddressExtensions
= 1 << 6,
455 X86_MachineCheckExtensions
= 1 << 7,
457 X86_CMPXCHG8Instruction
= 1 << 8,
458 X86_OnboardAPIC
= 1 << 9,
459 X86_SYSENTER_SYSEXIT
= 1 << 11,
461 X86_MemoryTypeRangeRegisters
= 1 << 12,
462 X86_PageGlobalEnable
= 1 << 13,
463 X86_MachineCheckArchitecture
= 1 << 14,
464 X86_CMOVInstruction
= 1 << 15,
466 X86_PageAttributeTable
= 1 << 16,
467 X86_36BitPSEs
= 1 << 17,
468 X86_ProcessorSerialNumber
= 1 << 18,
469 X86_CLFLUSHInstruction
= 1 << 19,
471 X86_DebugTraceStore
= 1 << 21,
472 X86_ACPIViaMSR
= 1 << 22,
473 X86_MultimediaExtensions
= 1 << 23,
475 X86_FXSAVE_FXRSTOR
= 1 << 24,
476 X86_StreamingSIMDExtensions
= 1 << 25,
477 X86_StreamingSIMDExtensions2
= 1 << 26,
478 X86_CPUSelfSnoop
= 1 << 27,
480 X86_HyperThreading
= 1 << 28,
481 X86_AutomaticClockControl
= 1 << 29,
482 X86_IA64Processor
= 1 << 30
485 //Setup the auxilliary vectors. These will already have endian conversion.
486 //Auxilliary vectors are loaded only for elf formatted executables.
487 ElfObject
* elfObject
= dynamic_cast<ElfObject
*>(objFile
);
492 X86_VirtualModeExtensions
|
493 X86_DebuggingExtensions
|
494 X86_PageSizeExtensions
|
495 X86_TimeStampCounter
|
496 X86_ModelSpecificRegisters
|
497 X86_PhysicalAddressExtensions
|
498 X86_MachineCheckExtensions
|
499 X86_CMPXCHG8Instruction
|
501 X86_SYSENTER_SYSEXIT
|
502 X86_MemoryTypeRangeRegisters
|
503 X86_PageGlobalEnable
|
504 X86_MachineCheckArchitecture
|
505 X86_CMOVInstruction
|
506 X86_PageAttributeTable
|
508 // X86_ProcessorSerialNumber |
509 X86_CLFLUSHInstruction
|
510 // X86_DebugTraceStore |
512 X86_MultimediaExtensions
|
514 X86_StreamingSIMDExtensions
|
515 X86_StreamingSIMDExtensions2
|
516 // X86_CPUSelfSnoop |
517 // X86_HyperThreading |
518 // X86_AutomaticClockControl |
519 // X86_IA64Processor |
522 //Bits which describe the system hardware capabilities
523 //XXX Figure out what these should be
524 auxv
.push_back(auxv_t(M5_AT_HWCAP
, features
));
525 //The system page size
526 auxv
.push_back(auxv_t(M5_AT_PAGESZ
, X86ISA::VMPageSize
));
527 //Frequency at which times() increments
528 //Defined to be 100 in the kernel source.
529 auxv
.push_back(auxv_t(M5_AT_CLKTCK
, 100));
530 // For statically linked executables, this is the virtual address of the
531 // program header tables if they appear in the executable image
532 auxv
.push_back(auxv_t(M5_AT_PHDR
, elfObject
->programHeaderTable()));
533 // This is the size of a program header entry from the elf file.
534 auxv
.push_back(auxv_t(M5_AT_PHENT
, elfObject
->programHeaderSize()));
535 // This is the number of program headers from the original elf file.
536 auxv
.push_back(auxv_t(M5_AT_PHNUM
, elfObject
->programHeaderCount()));
537 //This is the address of the elf "interpreter", It should be set
538 //to 0 for regular executables. It should be something else
539 //(not sure what) for dynamic libraries.
540 auxv
.push_back(auxv_t(M5_AT_BASE
, 0));
542 //XXX Figure out what this should be.
543 auxv
.push_back(auxv_t(M5_AT_FLAGS
, 0));
544 //The entry point to the program
545 auxv
.push_back(auxv_t(M5_AT_ENTRY
, objFile
->entryPoint()));
546 //Different user and group IDs
547 auxv
.push_back(auxv_t(M5_AT_UID
, uid()));
548 auxv
.push_back(auxv_t(M5_AT_EUID
, euid()));
549 auxv
.push_back(auxv_t(M5_AT_GID
, gid()));
550 auxv
.push_back(auxv_t(M5_AT_EGID
, egid()));
551 //Whether to enable "secure mode" in the executable
552 auxv
.push_back(auxv_t(M5_AT_SECURE
, 0));
553 //The address of 16 "random" bytes.
554 auxv
.push_back(auxv_t(M5_AT_RANDOM
, 0));
555 //The name of the program
556 auxv
.push_back(auxv_t(M5_AT_EXECFN
, 0));
557 //The platform string
558 auxv
.push_back(auxv_t(M5_AT_PLATFORM
, 0));
561 //Figure out how big the initial stack needs to be
563 // A sentry NULL void pointer at the top of the stack.
564 int sentry_size
= intSize
;
566 //This is the name of the file which is present on the initial stack
567 //It's purpose is to let the user space linker examine the original file.
568 int file_name_size
= filename
.size() + 1;
570 const int numRandomBytes
= 16;
571 int aux_data_size
= numRandomBytes
;
573 string platform
= "x86_64";
574 aux_data_size
+= platform
.size() + 1;
576 int env_data_size
= 0;
577 for (int i
= 0; i
< envp
.size(); ++i
) {
578 env_data_size
+= envp
[i
].size() + 1;
580 int arg_data_size
= 0;
581 for (int i
= 0; i
< argv
.size(); ++i
) {
582 arg_data_size
+= argv
[i
].size() + 1;
585 //The info_block needs to be padded so it's size is a multiple of the
586 //alignment mask. Also, it appears that there needs to be at least some
587 //padding, so if the size is already a multiple, we need to increase it
589 int base_info_block_size
=
590 sentry_size
+ file_name_size
+ env_data_size
+ arg_data_size
;
592 int info_block_size
= roundUp(base_info_block_size
, align
);
594 int info_block_padding
= info_block_size
- base_info_block_size
;
596 //Each auxilliary vector is two 8 byte words
597 int aux_array_size
= intSize
* 2 * (auxv
.size() + 1);
599 int envp_array_size
= intSize
* (envp
.size() + 1);
600 int argv_array_size
= intSize
* (argv
.size() + 1);
602 int argc_size
= intSize
;
604 //Figure out the size of the contents of the actual initial frame
611 //There needs to be padding after the auxiliary vector data so that the
612 //very bottom of the stack is aligned properly.
613 int partial_size
= frame_size
+ aux_data_size
;
614 int aligned_partial_size
= roundUp(partial_size
, align
);
615 int aux_padding
= aligned_partial_size
- partial_size
;
623 stack_min
= stack_base
- space_needed
;
624 stack_min
= roundDown(stack_min
, align
);
625 stack_size
= stack_base
- stack_min
;
628 pTable
->allocate(roundDown(stack_min
, pageSize
),
629 roundUp(stack_size
, pageSize
));
631 // map out initial stack contents
632 IntType sentry_base
= stack_base
- sentry_size
;
633 IntType file_name_base
= sentry_base
- file_name_size
;
634 IntType env_data_base
= file_name_base
- env_data_size
;
635 IntType arg_data_base
= env_data_base
- arg_data_size
;
636 IntType aux_data_base
= arg_data_base
- info_block_padding
- aux_data_size
;
637 IntType auxv_array_base
= aux_data_base
- aux_array_size
- aux_padding
;
638 IntType envp_array_base
= auxv_array_base
- envp_array_size
;
639 IntType argv_array_base
= envp_array_base
- argv_array_size
;
640 IntType argc_base
= argv_array_base
- argc_size
;
642 DPRINTF(Stack
, "The addresses of items on the initial stack:\n");
643 DPRINTF(Stack
, "0x%x - file name\n", file_name_base
);
644 DPRINTF(Stack
, "0x%x - env data\n", env_data_base
);
645 DPRINTF(Stack
, "0x%x - arg data\n", arg_data_base
);
646 DPRINTF(Stack
, "0x%x - aux data\n", aux_data_base
);
647 DPRINTF(Stack
, "0x%x - auxv array\n", auxv_array_base
);
648 DPRINTF(Stack
, "0x%x - envp array\n", envp_array_base
);
649 DPRINTF(Stack
, "0x%x - argv array\n", argv_array_base
);
650 DPRINTF(Stack
, "0x%x - argc \n", argc_base
);
651 DPRINTF(Stack
, "0x%x - stack min\n", stack_min
);
653 // write contents to stack
656 IntType argc
= argv
.size();
657 IntType guestArgc
= X86ISA::htog(argc
);
659 //Write out the sentry void *
660 IntType sentry_NULL
= 0;
661 initVirtMem
->writeBlob(sentry_base
,
662 (uint8_t*)&sentry_NULL
, sentry_size
);
664 //Write the file name
665 initVirtMem
->writeString(file_name_base
, filename
.c_str());
667 //Fix up the aux vectors which point to data
668 assert(auxv
[auxv
.size() - 3].a_type
== M5_AT_RANDOM
);
669 auxv
[auxv
.size() - 3].a_val
= aux_data_base
;
670 assert(auxv
[auxv
.size() - 2].a_type
== M5_AT_EXECFN
);
671 auxv
[auxv
.size() - 2].a_val
= argv_array_base
;
672 assert(auxv
[auxv
.size() - 1].a_type
== M5_AT_PLATFORM
);
673 auxv
[auxv
.size() - 1].a_val
= aux_data_base
+ numRandomBytes
;
676 for(int x
= 0; x
< auxv
.size(); x
++)
678 initVirtMem
->writeBlob(auxv_array_base
+ x
* 2 * intSize
,
679 (uint8_t*)&(auxv
[x
].a_type
), intSize
);
680 initVirtMem
->writeBlob(auxv_array_base
+ (x
* 2 + 1) * intSize
,
681 (uint8_t*)&(auxv
[x
].a_val
), intSize
);
683 //Write out the terminating zeroed auxilliary vector
684 const uint64_t zero
= 0;
685 initVirtMem
->writeBlob(auxv_array_base
+ 2 * intSize
* auxv
.size(),
686 (uint8_t*)&zero
, 2 * intSize
);
688 initVirtMem
->writeString(aux_data_base
, platform
.c_str());
690 copyStringArray(envp
, envp_array_base
, env_data_base
, initVirtMem
);
691 copyStringArray(argv
, argv_array_base
, arg_data_base
, initVirtMem
);
693 initVirtMem
->writeBlob(argc_base
, (uint8_t*)&guestArgc
, intSize
);
695 ThreadContext
*tc
= system
->getThreadContext(contextIds
[0]);
696 //Set the stack pointer register
697 tc
->setIntReg(StackPointerReg
, stack_min
);
699 Addr prog_entry
= objFile
->entryPoint();
700 // There doesn't need to be any segment base added in since we're dealing
701 // with the flat segmentation model.
702 tc
->setPC(prog_entry
);
703 tc
->setNextPC(prog_entry
+ sizeof(MachInst
));
705 //Align the "stack_min" to a page boundary.
706 stack_min
= roundDown(stack_min
, pageSize
);
712 X86_64LiveProcess::argsInit(int intSize
, int pageSize
)
714 std::vector
<AuxVector
<uint64_t> > extraAuxvs
;
715 extraAuxvs
.push_back(AuxVector
<uint64_t>(M5_AT_SYSINFO_EHDR
,
717 X86LiveProcess::argsInit
<uint64_t>(pageSize
, extraAuxvs
);
721 I386LiveProcess::argsInit(int intSize
, int pageSize
)
723 std::vector
<AuxVector
<uint32_t> > extraAuxvs
;
724 //Tell the binary where the vsyscall part of the vsyscall page is.
725 extraAuxvs
.push_back(AuxVector
<uint32_t>(M5_AT_SYSINFO
,
726 vsyscallPage
.base
+ vsyscallPage
.vsyscallOffset
));
727 extraAuxvs
.push_back(AuxVector
<uint32_t>(M5_AT_SYSINFO_EHDR
,
729 X86LiveProcess::argsInit
<uint32_t>(pageSize
, extraAuxvs
);
733 X86LiveProcess::setSyscallReturn(ThreadContext
*tc
, SyscallReturn return_value
)
735 tc
->setIntReg(INTREG_RAX
, return_value
.value());
739 X86_64LiveProcess::getSyscallArg(ThreadContext
*tc
, int &i
)
741 assert(i
< NumArgumentRegs
);
742 return tc
->readIntReg(ArgumentReg
[i
++]);
746 X86_64LiveProcess::setSyscallArg(ThreadContext
*tc
, int i
, X86ISA::IntReg val
)
748 assert(i
< NumArgumentRegs
);
749 return tc
->setIntReg(ArgumentReg
[i
], val
);
753 I386LiveProcess::getSyscallArg(ThreadContext
*tc
, int &i
)
755 assert(i
< NumArgumentRegs32
);
756 return tc
->readIntReg(ArgumentReg32
[i
++]);
760 I386LiveProcess::getSyscallArg(ThreadContext
*tc
, int &i
, int width
)
762 assert(width
== 32 || width
== 64);
763 assert(i
< NumArgumentRegs
);
764 uint64_t retVal
= tc
->readIntReg(ArgumentReg32
[i
++]) & mask(32);
766 retVal
|= ((uint64_t)tc
->readIntReg(ArgumentReg
[i
++]) << 32);
771 I386LiveProcess::setSyscallArg(ThreadContext
*tc
, int i
, X86ISA::IntReg val
)
773 assert(i
< NumArgumentRegs
);
774 return tc
->setIntReg(ArgumentReg
[i
], val
);