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.
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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
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26 * this software without specific prior written permission.
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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 "sim/process_impl.hh"
57 #include "sim/syscall_emul.hh"
58 #include "sim/system.hh"
61 using namespace X86ISA
;
63 static const int ArgumentReg
[] = {
67 //This argument register is r10 for syscalls and rcx for C.
73 static const int NumArgumentRegs
= sizeof(ArgumentReg
) / sizeof(const int);
74 static const int ArgumentReg32
[] = {
81 static const int NumArgumentRegs32
= sizeof(ArgumentReg
) / sizeof(const int);
83 X86LiveProcess::X86LiveProcess(LiveProcessParams
* params
, ObjectFile
*objFile
,
84 SyscallDesc
*_syscallDescs
, int _numSyscallDescs
) :
85 LiveProcess(params
, objFile
), syscallDescs(_syscallDescs
),
86 numSyscallDescs(_numSyscallDescs
)
88 brk_point
= objFile
->dataBase() + objFile
->dataSize() + objFile
->bssSize();
89 brk_point
= roundUp(brk_point
, VMPageSize
);
92 X86_64LiveProcess::X86_64LiveProcess(LiveProcessParams
*params
,
93 ObjectFile
*objFile
, SyscallDesc
*_syscallDescs
,
94 int _numSyscallDescs
) :
95 X86LiveProcess(params
, objFile
, _syscallDescs
, _numSyscallDescs
)
98 vsyscallPage
.base
= 0xffffffffff600000ULL
;
99 vsyscallPage
.size
= VMPageSize
;
100 vsyscallPage
.vtimeOffset
= 0x400;
101 vsyscallPage
.vgettimeofdayOffset
= 0x410;
103 // Set up stack. On X86_64 Linux, stack goes from the top of memory
104 // downward, less the hole for the kernel address space plus one page
105 // for undertermined purposes.
106 stack_base
= (Addr
)0x7FFFFFFFF000ULL
;
108 // Set pointer for next thread stack. Reserve 8M for main stack.
109 next_thread_stack_base
= stack_base
- (8 * 1024 * 1024);
111 // Set up region for mmaps. This was determined empirically and may not
112 // always be correct.
113 mmap_start
= mmap_end
= (Addr
)0x2aaaaaaab000ULL
;
117 I386LiveProcess::syscall(int64_t callnum
, ThreadContext
*tc
)
119 TheISA::PCState pc
= tc
->pcState();
121 if (eip
>= vsyscallPage
.base
&&
122 eip
< vsyscallPage
.base
+ vsyscallPage
.size
) {
123 pc
.npc(vsyscallPage
.base
+ vsyscallPage
.vsysexitOffset
);
126 X86LiveProcess::syscall(callnum
, tc
);
130 I386LiveProcess::I386LiveProcess(LiveProcessParams
*params
,
131 ObjectFile
*objFile
, SyscallDesc
*_syscallDescs
,
132 int _numSyscallDescs
) :
133 X86LiveProcess(params
, objFile
, _syscallDescs
, _numSyscallDescs
)
135 _gdtStart
= ULL(0x100000000);
136 _gdtSize
= VMPageSize
;
138 vsyscallPage
.base
= 0xffffe000ULL
;
139 vsyscallPage
.size
= VMPageSize
;
140 vsyscallPage
.vsyscallOffset
= 0x400;
141 vsyscallPage
.vsysexitOffset
= 0x410;
143 stack_base
= vsyscallPage
.base
;
145 // Set pointer for next thread stack. Reserve 8M for main stack.
146 next_thread_stack_base
= stack_base
- (8 * 1024 * 1024);
148 // Set up region for mmaps. This was determined empirically and may not
149 // always be correct.
150 mmap_start
= mmap_end
= (Addr
)0xf7ffe000ULL
;
154 X86LiveProcess::getDesc(int callnum
)
156 if (callnum
< 0 || callnum
>= numSyscallDescs
)
158 return &syscallDescs
[callnum
];
162 X86_64LiveProcess::initState()
164 X86LiveProcess::initState();
166 argsInit(sizeof(uint64_t), VMPageSize
);
168 // Set up the vsyscall page for this process.
169 allocateMem(vsyscallPage
.base
, vsyscallPage
.size
);
170 uint8_t vtimeBlob
[] = {
171 0x48,0xc7,0xc0,0xc9,0x00,0x00,0x00, // mov $0xc9,%rax
172 0x0f,0x05, // syscall
175 initVirtMem
.writeBlob(vsyscallPage
.base
+ vsyscallPage
.vtimeOffset
,
176 vtimeBlob
, sizeof(vtimeBlob
));
178 uint8_t vgettimeofdayBlob
[] = {
179 0x48,0xc7,0xc0,0x60,0x00,0x00,0x00, // mov $0x60,%rax
180 0x0f,0x05, // syscall
183 initVirtMem
.writeBlob(vsyscallPage
.base
+ vsyscallPage
.vgettimeofdayOffset
,
184 vgettimeofdayBlob
, sizeof(vgettimeofdayBlob
));
186 for (int i
= 0; i
< contextIds
.size(); i
++) {
187 ThreadContext
* tc
= system
->getThreadContext(contextIds
[i
]);
189 SegAttr dataAttr
= 0;
191 dataAttr
.unusable
= 0;
192 dataAttr
.defaultSize
= 1;
193 dataAttr
.longMode
= 1;
195 dataAttr
.granularity
= 1;
196 dataAttr
.present
= 1;
198 dataAttr
.writable
= 1;
199 dataAttr
.readable
= 1;
200 dataAttr
.expandDown
= 0;
203 //Initialize the segment registers.
204 for(int seg
= 0; seg
< NUM_SEGMENTREGS
; seg
++) {
205 tc
->setMiscRegNoEffect(MISCREG_SEG_BASE(seg
), 0);
206 tc
->setMiscRegNoEffect(MISCREG_SEG_EFF_BASE(seg
), 0);
207 tc
->setMiscRegNoEffect(MISCREG_SEG_ATTR(seg
), dataAttr
);
213 csAttr
.defaultSize
= 0;
216 csAttr
.granularity
= 1;
221 csAttr
.expandDown
= 0;
224 tc
->setMiscRegNoEffect(MISCREG_CS_ATTR
, csAttr
);
227 efer
.sce
= 1; // Enable system call extensions.
228 efer
.lme
= 1; // Enable long mode.
229 efer
.lma
= 1; // Activate long mode.
230 efer
.nxe
= 1; // Enable nx support.
231 efer
.svme
= 0; // Disable svm support for now. It isn't implemented.
232 efer
.ffxsr
= 1; // Turn on fast fxsave and fxrstor.
233 tc
->setMiscReg(MISCREG_EFER
, efer
);
235 //Set up the registers that describe the operating mode.
237 cr0
.pg
= 1; // Turn on paging.
238 cr0
.cd
= 0; // Don't disable caching.
239 cr0
.nw
= 0; // This is bit is defined to be ignored.
240 cr0
.am
= 0; // No alignment checking
241 cr0
.wp
= 0; // Supervisor mode can write read only pages
243 cr0
.et
= 1; // This should always be 1
244 cr0
.ts
= 0; // We don't do task switching, so causing fp exceptions
245 // would be pointless.
246 cr0
.em
= 0; // Allow x87 instructions to execute natively.
247 cr0
.mp
= 1; // This doesn't really matter, but the manual suggests
248 // setting it to one.
249 cr0
.pe
= 1; // We're definitely in protected mode.
250 tc
->setMiscReg(MISCREG_CR0
, cr0
);
252 tc
->setMiscReg(MISCREG_MXCSR
, 0x1f80);
257 I386LiveProcess::initState()
259 X86LiveProcess::initState();
261 argsInit(sizeof(uint32_t), VMPageSize
);
264 * Set up a GDT for this process. The whole GDT wouldn't really be for
265 * this process, but the only parts we care about are.
267 allocateMem(_gdtStart
, _gdtSize
);
269 assert(_gdtSize
% sizeof(zero
) == 0);
270 for (Addr gdtCurrent
= _gdtStart
;
271 gdtCurrent
< _gdtStart
+ _gdtSize
; gdtCurrent
+= sizeof(zero
)) {
272 initVirtMem
.write(gdtCurrent
, zero
);
275 // Set up the vsyscall page for this process.
276 allocateMem(vsyscallPage
.base
, vsyscallPage
.size
);
277 uint8_t vsyscallBlob
[] = {
281 0x89, 0xe5, // mov %esp, %ebp
282 0x0f, 0x34 // sysenter
284 initVirtMem
.writeBlob(vsyscallPage
.base
+ vsyscallPage
.vsyscallOffset
,
285 vsyscallBlob
, sizeof(vsyscallBlob
));
287 uint8_t vsysexitBlob
[] = {
293 initVirtMem
.writeBlob(vsyscallPage
.base
+ vsyscallPage
.vsysexitOffset
,
294 vsysexitBlob
, sizeof(vsysexitBlob
));
296 for (int i
= 0; i
< contextIds
.size(); i
++) {
297 ThreadContext
* tc
= system
->getThreadContext(contextIds
[i
]);
299 SegAttr dataAttr
= 0;
301 dataAttr
.unusable
= 0;
302 dataAttr
.defaultSize
= 1;
303 dataAttr
.longMode
= 0;
305 dataAttr
.granularity
= 1;
306 dataAttr
.present
= 1;
308 dataAttr
.writable
= 1;
309 dataAttr
.readable
= 1;
310 dataAttr
.expandDown
= 0;
313 //Initialize the segment registers.
314 for(int seg
= 0; seg
< NUM_SEGMENTREGS
; seg
++) {
315 tc
->setMiscRegNoEffect(MISCREG_SEG_BASE(seg
), 0);
316 tc
->setMiscRegNoEffect(MISCREG_SEG_EFF_BASE(seg
), 0);
317 tc
->setMiscRegNoEffect(MISCREG_SEG_ATTR(seg
), dataAttr
);
318 tc
->setMiscRegNoEffect(MISCREG_SEG_SEL(seg
), 0xB);
319 tc
->setMiscRegNoEffect(MISCREG_SEG_LIMIT(seg
), (uint32_t)(-1));
325 csAttr
.defaultSize
= 1;
328 csAttr
.granularity
= 1;
333 csAttr
.expandDown
= 0;
336 tc
->setMiscRegNoEffect(MISCREG_CS_ATTR
, csAttr
);
338 tc
->setMiscRegNoEffect(MISCREG_TSG_BASE
, _gdtStart
);
339 tc
->setMiscRegNoEffect(MISCREG_TSG_EFF_BASE
, _gdtStart
);
340 tc
->setMiscRegNoEffect(MISCREG_TSG_LIMIT
, _gdtStart
+ _gdtSize
- 1);
342 // Set the LDT selector to 0 to deactivate it.
343 tc
->setMiscRegNoEffect(MISCREG_TSL
, 0);
346 efer
.sce
= 1; // Enable system call extensions.
347 efer
.lme
= 1; // Enable long mode.
348 efer
.lma
= 0; // Deactivate long mode.
349 efer
.nxe
= 1; // Enable nx support.
350 efer
.svme
= 0; // Disable svm support for now. It isn't implemented.
351 efer
.ffxsr
= 1; // Turn on fast fxsave and fxrstor.
352 tc
->setMiscReg(MISCREG_EFER
, efer
);
354 //Set up the registers that describe the operating mode.
356 cr0
.pg
= 1; // Turn on paging.
357 cr0
.cd
= 0; // Don't disable caching.
358 cr0
.nw
= 0; // This is bit is defined to be ignored.
359 cr0
.am
= 0; // No alignment checking
360 cr0
.wp
= 0; // Supervisor mode can write read only pages
362 cr0
.et
= 1; // This should always be 1
363 cr0
.ts
= 0; // We don't do task switching, so causing fp exceptions
364 // would be pointless.
365 cr0
.em
= 0; // Allow x87 instructions to execute natively.
366 cr0
.mp
= 1; // This doesn't really matter, but the manual suggests
367 // setting it to one.
368 cr0
.pe
= 1; // We're definitely in protected mode.
369 tc
->setMiscReg(MISCREG_CR0
, cr0
);
371 tc
->setMiscReg(MISCREG_MXCSR
, 0x1f80);
375 template<class IntType
>
377 X86LiveProcess::argsInit(int pageSize
,
378 std::vector
<AuxVector
<IntType
> > extraAuxvs
)
380 int intSize
= sizeof(IntType
);
382 typedef AuxVector
<IntType
> auxv_t
;
383 std::vector
<auxv_t
> auxv
= extraAuxvs
;
391 //We want 16 byte alignment
394 // load object file into target memory
395 objFile
->loadSections(initVirtMem
);
398 X86_OnboardFPU
= 1 << 0,
399 X86_VirtualModeExtensions
= 1 << 1,
400 X86_DebuggingExtensions
= 1 << 2,
401 X86_PageSizeExtensions
= 1 << 3,
403 X86_TimeStampCounter
= 1 << 4,
404 X86_ModelSpecificRegisters
= 1 << 5,
405 X86_PhysicalAddressExtensions
= 1 << 6,
406 X86_MachineCheckExtensions
= 1 << 7,
408 X86_CMPXCHG8Instruction
= 1 << 8,
409 X86_OnboardAPIC
= 1 << 9,
410 X86_SYSENTER_SYSEXIT
= 1 << 11,
412 X86_MemoryTypeRangeRegisters
= 1 << 12,
413 X86_PageGlobalEnable
= 1 << 13,
414 X86_MachineCheckArchitecture
= 1 << 14,
415 X86_CMOVInstruction
= 1 << 15,
417 X86_PageAttributeTable
= 1 << 16,
418 X86_36BitPSEs
= 1 << 17,
419 X86_ProcessorSerialNumber
= 1 << 18,
420 X86_CLFLUSHInstruction
= 1 << 19,
422 X86_DebugTraceStore
= 1 << 21,
423 X86_ACPIViaMSR
= 1 << 22,
424 X86_MultimediaExtensions
= 1 << 23,
426 X86_FXSAVE_FXRSTOR
= 1 << 24,
427 X86_StreamingSIMDExtensions
= 1 << 25,
428 X86_StreamingSIMDExtensions2
= 1 << 26,
429 X86_CPUSelfSnoop
= 1 << 27,
431 X86_HyperThreading
= 1 << 28,
432 X86_AutomaticClockControl
= 1 << 29,
433 X86_IA64Processor
= 1 << 30
436 //Setup the auxilliary vectors. These will already have endian conversion.
437 //Auxilliary vectors are loaded only for elf formatted executables.
438 ElfObject
* elfObject
= dynamic_cast<ElfObject
*>(objFile
);
443 X86_VirtualModeExtensions
|
444 X86_DebuggingExtensions
|
445 X86_PageSizeExtensions
|
446 X86_TimeStampCounter
|
447 X86_ModelSpecificRegisters
|
448 X86_PhysicalAddressExtensions
|
449 X86_MachineCheckExtensions
|
450 X86_CMPXCHG8Instruction
|
452 X86_SYSENTER_SYSEXIT
|
453 X86_MemoryTypeRangeRegisters
|
454 X86_PageGlobalEnable
|
455 X86_MachineCheckArchitecture
|
456 X86_CMOVInstruction
|
457 X86_PageAttributeTable
|
459 // X86_ProcessorSerialNumber |
460 X86_CLFLUSHInstruction
|
461 // X86_DebugTraceStore |
463 X86_MultimediaExtensions
|
465 X86_StreamingSIMDExtensions
|
466 X86_StreamingSIMDExtensions2
|
467 // X86_CPUSelfSnoop |
468 // X86_HyperThreading |
469 // X86_AutomaticClockControl |
470 // X86_IA64Processor |
473 //Bits which describe the system hardware capabilities
474 //XXX Figure out what these should be
475 auxv
.push_back(auxv_t(M5_AT_HWCAP
, features
));
476 //The system page size
477 auxv
.push_back(auxv_t(M5_AT_PAGESZ
, X86ISA::VMPageSize
));
478 //Frequency at which times() increments
479 //Defined to be 100 in the kernel source.
480 auxv
.push_back(auxv_t(M5_AT_CLKTCK
, 100));
481 // For statically linked executables, this is the virtual address of the
482 // program header tables if they appear in the executable image
483 auxv
.push_back(auxv_t(M5_AT_PHDR
, elfObject
->programHeaderTable()));
484 // This is the size of a program header entry from the elf file.
485 auxv
.push_back(auxv_t(M5_AT_PHENT
, elfObject
->programHeaderSize()));
486 // This is the number of program headers from the original elf file.
487 auxv
.push_back(auxv_t(M5_AT_PHNUM
, elfObject
->programHeaderCount()));
488 //This is the address of the elf "interpreter", It should be set
489 //to 0 for regular executables. It should be something else
490 //(not sure what) for dynamic libraries.
491 auxv
.push_back(auxv_t(M5_AT_BASE
, 0));
493 //XXX Figure out what this should be.
494 auxv
.push_back(auxv_t(M5_AT_FLAGS
, 0));
495 //The entry point to the program
496 auxv
.push_back(auxv_t(M5_AT_ENTRY
, objFile
->entryPoint()));
497 //Different user and group IDs
498 auxv
.push_back(auxv_t(M5_AT_UID
, uid()));
499 auxv
.push_back(auxv_t(M5_AT_EUID
, euid()));
500 auxv
.push_back(auxv_t(M5_AT_GID
, gid()));
501 auxv
.push_back(auxv_t(M5_AT_EGID
, egid()));
502 //Whether to enable "secure mode" in the executable
503 auxv
.push_back(auxv_t(M5_AT_SECURE
, 0));
504 //The address of 16 "random" bytes.
505 auxv
.push_back(auxv_t(M5_AT_RANDOM
, 0));
506 //The name of the program
507 auxv
.push_back(auxv_t(M5_AT_EXECFN
, 0));
508 //The platform string
509 auxv
.push_back(auxv_t(M5_AT_PLATFORM
, 0));
512 //Figure out how big the initial stack needs to be
514 // A sentry NULL void pointer at the top of the stack.
515 int sentry_size
= intSize
;
517 //This is the name of the file which is present on the initial stack
518 //It's purpose is to let the user space linker examine the original file.
519 int file_name_size
= filename
.size() + 1;
521 const int numRandomBytes
= 16;
522 int aux_data_size
= numRandomBytes
;
524 string platform
= "x86_64";
525 aux_data_size
+= platform
.size() + 1;
527 int env_data_size
= 0;
528 for (int i
= 0; i
< envp
.size(); ++i
) {
529 env_data_size
+= envp
[i
].size() + 1;
531 int arg_data_size
= 0;
532 for (int i
= 0; i
< argv
.size(); ++i
) {
533 arg_data_size
+= argv
[i
].size() + 1;
536 //The info_block needs to be padded so it's size is a multiple of the
537 //alignment mask. Also, it appears that there needs to be at least some
538 //padding, so if the size is already a multiple, we need to increase it
540 int base_info_block_size
=
541 sentry_size
+ file_name_size
+ env_data_size
+ arg_data_size
;
543 int info_block_size
= roundUp(base_info_block_size
, align
);
545 int info_block_padding
= info_block_size
- base_info_block_size
;
547 //Each auxilliary vector is two 8 byte words
548 int aux_array_size
= intSize
* 2 * (auxv
.size() + 1);
550 int envp_array_size
= intSize
* (envp
.size() + 1);
551 int argv_array_size
= intSize
* (argv
.size() + 1);
553 int argc_size
= intSize
;
555 //Figure out the size of the contents of the actual initial frame
562 //There needs to be padding after the auxiliary vector data so that the
563 //very bottom of the stack is aligned properly.
564 int partial_size
= frame_size
+ aux_data_size
;
565 int aligned_partial_size
= roundUp(partial_size
, align
);
566 int aux_padding
= aligned_partial_size
- partial_size
;
574 stack_min
= stack_base
- space_needed
;
575 stack_min
= roundDown(stack_min
, align
);
576 stack_size
= stack_base
- stack_min
;
579 allocateMem(roundDown(stack_min
, pageSize
), roundUp(stack_size
, pageSize
));
581 // map out initial stack contents
582 IntType sentry_base
= stack_base
- sentry_size
;
583 IntType file_name_base
= sentry_base
- file_name_size
;
584 IntType env_data_base
= file_name_base
- env_data_size
;
585 IntType arg_data_base
= env_data_base
- arg_data_size
;
586 IntType aux_data_base
= arg_data_base
- info_block_padding
- aux_data_size
;
587 IntType auxv_array_base
= aux_data_base
- aux_array_size
- aux_padding
;
588 IntType envp_array_base
= auxv_array_base
- envp_array_size
;
589 IntType argv_array_base
= envp_array_base
- argv_array_size
;
590 IntType argc_base
= argv_array_base
- argc_size
;
592 DPRINTF(Stack
, "The addresses of items on the initial stack:\n");
593 DPRINTF(Stack
, "0x%x - file name\n", file_name_base
);
594 DPRINTF(Stack
, "0x%x - env data\n", env_data_base
);
595 DPRINTF(Stack
, "0x%x - arg data\n", arg_data_base
);
596 DPRINTF(Stack
, "0x%x - aux data\n", aux_data_base
);
597 DPRINTF(Stack
, "0x%x - auxv array\n", auxv_array_base
);
598 DPRINTF(Stack
, "0x%x - envp array\n", envp_array_base
);
599 DPRINTF(Stack
, "0x%x - argv array\n", argv_array_base
);
600 DPRINTF(Stack
, "0x%x - argc \n", argc_base
);
601 DPRINTF(Stack
, "0x%x - stack min\n", stack_min
);
603 // write contents to stack
606 IntType argc
= argv
.size();
607 IntType guestArgc
= X86ISA::htog(argc
);
609 //Write out the sentry void *
610 IntType sentry_NULL
= 0;
611 initVirtMem
.writeBlob(sentry_base
,
612 (uint8_t*)&sentry_NULL
, sentry_size
);
614 //Write the file name
615 initVirtMem
.writeString(file_name_base
, filename
.c_str());
617 //Fix up the aux vectors which point to data
618 assert(auxv
[auxv
.size() - 3].a_type
== M5_AT_RANDOM
);
619 auxv
[auxv
.size() - 3].a_val
= aux_data_base
;
620 assert(auxv
[auxv
.size() - 2].a_type
== M5_AT_EXECFN
);
621 auxv
[auxv
.size() - 2].a_val
= argv_array_base
;
622 assert(auxv
[auxv
.size() - 1].a_type
== M5_AT_PLATFORM
);
623 auxv
[auxv
.size() - 1].a_val
= aux_data_base
+ numRandomBytes
;
626 for(int x
= 0; x
< auxv
.size(); x
++)
628 initVirtMem
.writeBlob(auxv_array_base
+ x
* 2 * intSize
,
629 (uint8_t*)&(auxv
[x
].a_type
), intSize
);
630 initVirtMem
.writeBlob(auxv_array_base
+ (x
* 2 + 1) * intSize
,
631 (uint8_t*)&(auxv
[x
].a_val
), intSize
);
633 //Write out the terminating zeroed auxilliary vector
634 const uint64_t zero
= 0;
635 initVirtMem
.writeBlob(auxv_array_base
+ 2 * intSize
* auxv
.size(),
636 (uint8_t*)&zero
, 2 * intSize
);
638 initVirtMem
.writeString(aux_data_base
, platform
.c_str());
640 copyStringArray(envp
, envp_array_base
, env_data_base
, initVirtMem
);
641 copyStringArray(argv
, argv_array_base
, arg_data_base
, initVirtMem
);
643 initVirtMem
.writeBlob(argc_base
, (uint8_t*)&guestArgc
, intSize
);
645 ThreadContext
*tc
= system
->getThreadContext(contextIds
[0]);
646 //Set the stack pointer register
647 tc
->setIntReg(StackPointerReg
, stack_min
);
649 // There doesn't need to be any segment base added in since we're dealing
650 // with the flat segmentation model.
651 tc
->pcState(objFile
->entryPoint());
653 //Align the "stack_min" to a page boundary.
654 stack_min
= roundDown(stack_min
, pageSize
);
660 X86_64LiveProcess::argsInit(int intSize
, int pageSize
)
662 std::vector
<AuxVector
<uint64_t> > extraAuxvs
;
663 extraAuxvs
.push_back(AuxVector
<uint64_t>(M5_AT_SYSINFO_EHDR
,
665 X86LiveProcess::argsInit
<uint64_t>(pageSize
, extraAuxvs
);
669 I386LiveProcess::argsInit(int intSize
, int pageSize
)
671 std::vector
<AuxVector
<uint32_t> > extraAuxvs
;
672 //Tell the binary where the vsyscall part of the vsyscall page is.
673 extraAuxvs
.push_back(AuxVector
<uint32_t>(M5_AT_SYSINFO
,
674 vsyscallPage
.base
+ vsyscallPage
.vsyscallOffset
));
675 extraAuxvs
.push_back(AuxVector
<uint32_t>(M5_AT_SYSINFO_EHDR
,
677 X86LiveProcess::argsInit
<uint32_t>(pageSize
, extraAuxvs
);
681 X86LiveProcess::setSyscallReturn(ThreadContext
*tc
, SyscallReturn return_value
)
683 tc
->setIntReg(INTREG_RAX
, return_value
.value());
687 X86_64LiveProcess::getSyscallArg(ThreadContext
*tc
, int &i
)
689 assert(i
< NumArgumentRegs
);
690 return tc
->readIntReg(ArgumentReg
[i
++]);
694 X86_64LiveProcess::setSyscallArg(ThreadContext
*tc
, int i
, X86ISA::IntReg val
)
696 assert(i
< NumArgumentRegs
);
697 return tc
->setIntReg(ArgumentReg
[i
], val
);
701 I386LiveProcess::getSyscallArg(ThreadContext
*tc
, int &i
)
703 assert(i
< NumArgumentRegs32
);
704 return tc
->readIntReg(ArgumentReg32
[i
++]);
708 I386LiveProcess::getSyscallArg(ThreadContext
*tc
, int &i
, int width
)
710 assert(width
== 32 || width
== 64);
711 assert(i
< NumArgumentRegs
);
712 uint64_t retVal
= tc
->readIntReg(ArgumentReg32
[i
++]) & mask(32);
714 retVal
|= ((uint64_t)tc
->readIntReg(ArgumentReg
[i
++]) << 32);
719 I386LiveProcess::setSyscallArg(ThreadContext
*tc
, int i
, X86ISA::IntReg val
)
721 assert(i
< NumArgumentRegs
);
722 return tc
->setIntReg(ArgumentReg
[i
], val
);