2 * Copyright (c) 2003-2004 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
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 #include "arch/sparc/asi.hh"
33 #include "arch/sparc/handlers.hh"
34 #include "arch/sparc/isa_traits.hh"
35 #include "arch/sparc/process.hh"
36 #include "arch/sparc/types.hh"
37 #include "base/loader/object_file.hh"
38 #include "base/loader/elf_object.hh"
39 #include "base/misc.hh"
40 #include "cpu/thread_context.hh"
41 #include "mem/page_table.hh"
42 #include "sim/process_impl.hh"
43 #include "mem/translating_port.hh"
44 #include "sim/system.hh"
47 using namespace SparcISA
;
50 SparcLiveProcess::SparcLiveProcess(const std::string
&nm
, ObjectFile
*objFile
,
51 System
*_system
, int stdin_fd
, int stdout_fd
, int stderr_fd
,
52 std::vector
<std::string
> &argv
, std::vector
<std::string
> &envp
,
53 const std::string
&cwd
,
54 uint64_t _uid
, uint64_t _euid
, uint64_t _gid
, uint64_t _egid
,
55 uint64_t _pid
, uint64_t _ppid
)
56 : LiveProcess(nm
, objFile
, _system
, stdin_fd
, stdout_fd
, stderr_fd
,
57 argv
, envp
, cwd
, _uid
, _euid
, _gid
, _egid
, _pid
, _ppid
)
60 // XXX all the below need to be updated for SPARC - Ali
61 brk_point
= objFile
->dataBase() + objFile
->dataSize() + objFile
->bssSize();
62 brk_point
= roundUp(brk_point
, VMPageSize
);
64 // Set pointer for next thread stack. Reserve 8M for main stack.
65 next_thread_stack_base
= stack_base
- (8 * 1024 * 1024);
67 //Initialize these to 0s
72 void SparcLiveProcess::handleTrap(int trapNum
, ThreadContext
*tc
)
76 case 0x03: //Flush window trap
77 warn("Ignoring request to flush register windows.\n");
80 panic("Unimplemented trap to operating system: trap number %#x.\n", trapNum
);
85 Sparc32LiveProcess::startup()
87 argsInit(32 / 8, VMPageSize
);
91 //The process runs in user mode with 32 bit addresses
92 threadContexts
[0]->setMiscReg(MISCREG_PSTATE
, 0x0a);
94 //Setup default FP state
95 threadContexts
[0]->setMiscRegNoEffect(MISCREG_FSR
, 0);
97 threadContexts
[0]->setMiscRegNoEffect(MISCREG_TICK
, 0);
100 * Register window management registers
103 //No windows contain info from other programs
104 //threadContexts[0]->setMiscRegNoEffect(MISCREG_OTHERWIN, 0);
105 threadContexts
[0]->setIntReg(NumIntArchRegs
+ 6, 0);
106 //There are no windows to pop
107 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANRESTORE, 0);
108 threadContexts
[0]->setIntReg(NumIntArchRegs
+ 4, 0);
109 //All windows are available to save into
110 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANSAVE, NWindows - 2);
111 threadContexts
[0]->setIntReg(NumIntArchRegs
+ 3, NWindows
- 2);
112 //All windows are "clean"
113 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CLEANWIN, NWindows);
114 threadContexts
[0]->setIntReg(NumIntArchRegs
+ 5, NWindows
);
115 //Start with register window 0
116 threadContexts
[0]->setMiscRegNoEffect(MISCREG_CWP
, 0);
117 //Always use spill and fill traps 0
118 //threadContexts[0]->setMiscRegNoEffect(MISCREG_WSTATE, 0);
119 threadContexts
[0]->setIntReg(NumIntArchRegs
+ 7, 0);
120 //Set the trap level to 0
121 threadContexts
[0]->setMiscRegNoEffect(MISCREG_TL
, 0);
122 //Set the ASI register to something fixed
123 threadContexts
[0]->setMiscRegNoEffect(MISCREG_ASI
, ASI_PRIMARY
);
127 Sparc64LiveProcess::startup()
129 argsInit(sizeof(IntReg
), VMPageSize
);
133 //The process runs in user mode
134 threadContexts
[0]->setMiscReg(MISCREG_PSTATE
, 0x02);
136 //Setup default FP state
137 threadContexts
[0]->setMiscRegNoEffect(MISCREG_FSR
, 0);
139 threadContexts
[0]->setMiscRegNoEffect(MISCREG_TICK
, 0);
142 * Register window management registers
145 //No windows contain info from other programs
146 //threadContexts[0]->setMiscRegNoEffect(MISCREG_OTHERWIN, 0);
147 threadContexts
[0]->setIntReg(NumIntArchRegs
+ 6, 0);
148 //There are no windows to pop
149 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANRESTORE, 0);
150 threadContexts
[0]->setIntReg(NumIntArchRegs
+ 4, 0);
151 //All windows are available to save into
152 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANSAVE, NWindows - 2);
153 threadContexts
[0]->setIntReg(NumIntArchRegs
+ 3, NWindows
- 2);
154 //All windows are "clean"
155 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CLEANWIN, NWindows);
156 threadContexts
[0]->setIntReg(NumIntArchRegs
+ 5, NWindows
);
157 //Start with register window 0
158 threadContexts
[0]->setMiscRegNoEffect(MISCREG_CWP
, 0);
159 //Always use spill and fill traps 0
160 //threadContexts[0]->setMiscRegNoEffect(MISCREG_WSTATE, 0);
161 threadContexts
[0]->setIntReg(NumIntArchRegs
+ 7, 0);
162 //Set the trap level to 0
163 threadContexts
[0]->setMiscRegNoEffect(MISCREG_TL
, 0);
164 //Set the ASI register to something fixed
165 threadContexts
[0]->setMiscRegNoEffect(MISCREG_ASI
, ASI_PRIMARY
);
168 M5_32_auxv_t::M5_32_auxv_t(int32_t type
, int32_t val
)
170 a_type
= TheISA::htog(type
);
171 a_val
= TheISA::htog(val
);
174 M5_64_auxv_t::M5_64_auxv_t(int64_t type
, int64_t val
)
176 a_type
= TheISA::htog(type
);
177 a_val
= TheISA::htog(val
);
181 Sparc64LiveProcess::argsInit(int intSize
, int pageSize
)
183 typedef M5_64_auxv_t auxv_t
;
192 Addr alignmentMask
= ~(intSize
- 1);
194 // load object file into target memory
195 objFile
->loadSections(initVirtMem
);
199 M5_HWCAP_SPARC_FLUSH
= 1,
200 M5_HWCAP_SPARC_STBAR
= 2,
201 M5_HWCAP_SPARC_SWAP
= 4,
202 M5_HWCAP_SPARC_MULDIV
= 8,
203 M5_HWCAP_SPARC_V9
= 16,
204 //This one should technically only be set
205 //if there is a cheetah or cheetah_plus tlb,
206 //but we'll use it all the time
207 M5_HWCAP_SPARC_ULTRA3
= 32
210 const int64_t hwcap
=
211 M5_HWCAP_SPARC_FLUSH
|
212 M5_HWCAP_SPARC_STBAR
|
213 M5_HWCAP_SPARC_SWAP
|
214 M5_HWCAP_SPARC_MULDIV
|
216 M5_HWCAP_SPARC_ULTRA3
;
219 //Setup the auxilliary vectors. These will already have endian conversion.
220 //Auxilliary vectors are loaded only for elf formatted executables.
221 ElfObject
* elfObject
= dynamic_cast<ElfObject
*>(objFile
);
224 //Bits which describe the system hardware capabilities
225 auxv
.push_back(auxv_t(M5_AT_HWCAP
, hwcap
));
226 //The system page size
227 auxv
.push_back(auxv_t(M5_AT_PAGESZ
, SparcISA::VMPageSize
));
228 //Defined to be 100 in the kernel source.
229 //Frequency at which times() increments
230 auxv
.push_back(auxv_t(M5_AT_CLKTCK
, 100));
231 // For statically linked executables, this is the virtual address of the
232 // program header tables if they appear in the executable image
233 auxv
.push_back(auxv_t(M5_AT_PHDR
, elfObject
->programHeaderTable()));
234 // This is the size of a program header entry from the elf file.
235 auxv
.push_back(auxv_t(M5_AT_PHENT
, elfObject
->programHeaderSize()));
236 // This is the number of program headers from the original elf file.
237 auxv
.push_back(auxv_t(M5_AT_PHNUM
, elfObject
->programHeaderCount()));
238 //This is the address of the elf "interpreter", It should be set
239 //to 0 for regular executables. It should be something else
240 //(not sure what) for dynamic libraries.
241 auxv
.push_back(auxv_t(M5_AT_BASE
, 0));
242 //This is hardwired to 0 in the elf loading code in the kernel
243 auxv
.push_back(auxv_t(M5_AT_FLAGS
, 0));
244 //The entry point to the program
245 auxv
.push_back(auxv_t(M5_AT_ENTRY
, objFile
->entryPoint()));
246 //Different user and group IDs
247 auxv
.push_back(auxv_t(M5_AT_UID
, uid()));
248 auxv
.push_back(auxv_t(M5_AT_EUID
, euid()));
249 auxv
.push_back(auxv_t(M5_AT_GID
, gid()));
250 auxv
.push_back(auxv_t(M5_AT_EGID
, egid()));
251 //Whether to enable "secure mode" in the executable
252 auxv
.push_back(auxv_t(M5_AT_SECURE
, 0));
255 //Figure out how big the initial stack needs to be
257 // The unaccounted for 0 at the top of the stack
258 int mysterious_size
= intSize
;
260 //This is the name of the file which is present on the initial stack
261 //It's purpose is to let the user space linker examine the original file.
262 int file_name_size
= filename
.size() + 1;
264 int env_data_size
= 0;
265 for (int i
= 0; i
< envp
.size(); ++i
) {
266 env_data_size
+= envp
[i
].size() + 1;
268 int arg_data_size
= 0;
269 for (int i
= 0; i
< argv
.size(); ++i
) {
270 arg_data_size
+= argv
[i
].size() + 1;
273 //The info_block needs to be padded so it's size is a multiple of the
274 //alignment mask. Also, it appears that there needs to be at least some
275 //padding, so if the size is already a multiple, we need to increase it
277 int info_block_size
=
281 intSize
) & alignmentMask
;
283 int info_block_padding
=
289 //Each auxilliary vector is two 8 byte words
290 int aux_array_size
= intSize
* 2 * (auxv
.size() + 1);
292 int envp_array_size
= intSize
* (envp
.size() + 1);
293 int argv_array_size
= intSize
* (argv
.size() + 1);
295 int argc_size
= intSize
;
296 int window_save_size
= intSize
* 16;
307 stack_min
= stack_base
- space_needed
;
308 stack_min
&= alignmentMask
;
309 stack_size
= stack_base
- stack_min
;
312 pTable
->allocate(roundDown(stack_min
, pageSize
),
313 roundUp(stack_size
, pageSize
));
315 // map out initial stack contents
316 Addr mysterious_base
= stack_base
- mysterious_size
;
317 Addr file_name_base
= mysterious_base
- file_name_size
;
318 Addr env_data_base
= file_name_base
- env_data_size
;
319 Addr arg_data_base
= env_data_base
- arg_data_size
;
320 Addr auxv_array_base
= arg_data_base
- aux_array_size
- info_block_padding
;
321 Addr envp_array_base
= auxv_array_base
- envp_array_size
;
322 Addr argv_array_base
= envp_array_base
- argv_array_size
;
323 Addr argc_base
= argv_array_base
- argc_size
;
325 // only used in DPRINTF
326 Addr window_save_base
= argc_base
- window_save_size
;
329 DPRINTF(Sparc
, "The addresses of items on the initial stack:\n");
330 DPRINTF(Sparc
, "0x%x - file name\n", file_name_base
);
331 DPRINTF(Sparc
, "0x%x - env data\n", env_data_base
);
332 DPRINTF(Sparc
, "0x%x - arg data\n", arg_data_base
);
333 DPRINTF(Sparc
, "0x%x - auxv array\n", auxv_array_base
);
334 DPRINTF(Sparc
, "0x%x - envp array\n", envp_array_base
);
335 DPRINTF(Sparc
, "0x%x - argv array\n", argv_array_base
);
336 DPRINTF(Sparc
, "0x%x - argc \n", argc_base
);
337 DPRINTF(Sparc
, "0x%x - window save\n", window_save_base
);
338 DPRINTF(Sparc
, "0x%x - stack min\n", stack_min
);
340 // write contents to stack
343 uint64_t argc
= argv
.size();
344 uint64_t guestArgc
= TheISA::htog(argc
);
346 //Write out the mysterious 0
347 uint64_t mysterious_zero
= 0;
348 initVirtMem
->writeBlob(mysterious_base
,
349 (uint8_t*)&mysterious_zero
, mysterious_size
);
351 //Write the file name
352 initVirtMem
->writeString(file_name_base
, filename
.c_str());
355 for(int x
= 0; x
< auxv
.size(); x
++)
357 initVirtMem
->writeBlob(auxv_array_base
+ x
* 2 * intSize
,
358 (uint8_t*)&(auxv
[x
].a_type
), intSize
);
359 initVirtMem
->writeBlob(auxv_array_base
+ (x
* 2 + 1) * intSize
,
360 (uint8_t*)&(auxv
[x
].a_val
), intSize
);
362 //Write out the terminating zeroed auxilliary vector
363 const uint64_t zero
= 0;
364 initVirtMem
->writeBlob(auxv_array_base
+ 2 * intSize
* auxv
.size(),
365 (uint8_t*)&zero
, 2 * intSize
);
367 copyStringArray(envp
, envp_array_base
, env_data_base
, initVirtMem
);
368 copyStringArray(argv
, argv_array_base
, arg_data_base
, initVirtMem
);
370 initVirtMem
->writeBlob(argc_base
, (uint8_t*)&guestArgc
, intSize
);
372 //Stuff the trap handlers into the processes address space.
373 //Since the stack grows down and is the highest area in the processes
374 //address space, we can put stuff above it and stay out of the way.
375 int fillSize
= sizeof(MachInst
) * numFillInsts
;
376 int spillSize
= sizeof(MachInst
) * numSpillInsts
;
377 fillStart
= stack_base
;
378 spillStart
= fillStart
+ fillSize
;
379 initVirtMem
->writeBlob(fillStart
, (uint8_t*)fillHandler64
, fillSize
);
380 initVirtMem
->writeBlob(spillStart
, (uint8_t*)spillHandler64
, spillSize
);
382 //Set up the thread context to start running the process
383 assert(NumArgumentRegs
>= 2);
384 threadContexts
[0]->setIntReg(ArgumentReg
[0], argc
);
385 threadContexts
[0]->setIntReg(ArgumentReg
[1], argv_array_base
);
386 threadContexts
[0]->setIntReg(StackPointerReg
, stack_min
- StackBias
);
388 Addr prog_entry
= objFile
->entryPoint();
389 threadContexts
[0]->setPC(prog_entry
);
390 threadContexts
[0]->setNextPC(prog_entry
+ sizeof(MachInst
));
391 threadContexts
[0]->setNextNPC(prog_entry
+ (2 * sizeof(MachInst
)));
393 //Align the "stack_min" to a page boundary.
394 stack_min
= roundDown(stack_min
, pageSize
);
400 Sparc32LiveProcess::argsInit(int intSize
, int pageSize
)
402 typedef M5_32_auxv_t auxv_t
;
411 //Even though this is a 32 bit process, the ABI says we still need to
412 //maintain double word alignment of the stack pointer.
413 Addr alignmentMask
= ~(8 - 1);
415 // load object file into target memory
416 objFile
->loadSections(initVirtMem
);
418 //These are the auxilliary vector types
423 SPARC_AT_CLKTCK
= 17,
439 M5_HWCAP_SPARC_FLUSH
= 1,
440 M5_HWCAP_SPARC_STBAR
= 2,
441 M5_HWCAP_SPARC_SWAP
= 4,
442 M5_HWCAP_SPARC_MULDIV
= 8,
443 M5_HWCAP_SPARC_V9
= 16,
444 //This one should technically only be set
445 //if there is a cheetah or cheetah_plus tlb,
446 //but we'll use it all the time
447 M5_HWCAP_SPARC_ULTRA3
= 32
450 const int64_t hwcap
=
451 M5_HWCAP_SPARC_FLUSH
|
452 M5_HWCAP_SPARC_STBAR
|
453 M5_HWCAP_SPARC_SWAP
|
454 M5_HWCAP_SPARC_MULDIV
|
456 M5_HWCAP_SPARC_ULTRA3
;
459 //Setup the auxilliary vectors. These will already have endian conversion.
460 //Auxilliary vectors are loaded only for elf formatted executables.
461 ElfObject
* elfObject
= dynamic_cast<ElfObject
*>(objFile
);
464 //Bits which describe the system hardware capabilities
465 auxv
.push_back(auxv_t(SPARC_AT_HWCAP
, hwcap
));
466 //The system page size
467 auxv
.push_back(auxv_t(SPARC_AT_PAGESZ
, SparcISA::VMPageSize
));
468 //Defined to be 100 in the kernel source.
469 //Frequency at which times() increments
470 auxv
.push_back(auxv_t(SPARC_AT_CLKTCK
, 100));
471 // For statically linked executables, this is the virtual address of the
472 // program header tables if they appear in the executable image
473 auxv
.push_back(auxv_t(SPARC_AT_PHDR
, elfObject
->programHeaderTable()));
474 // This is the size of a program header entry from the elf file.
475 auxv
.push_back(auxv_t(SPARC_AT_PHENT
, elfObject
->programHeaderSize()));
476 // This is the number of program headers from the original elf file.
477 auxv
.push_back(auxv_t(SPARC_AT_PHNUM
, elfObject
->programHeaderCount()));
478 //This is the address of the elf "interpreter", It should be set
479 //to 0 for regular executables. It should be something else
480 //(not sure what) for dynamic libraries.
481 auxv
.push_back(auxv_t(SPARC_AT_BASE
, 0));
482 //This is hardwired to 0 in the elf loading code in the kernel
483 auxv
.push_back(auxv_t(SPARC_AT_FLAGS
, 0));
484 //The entry point to the program
485 auxv
.push_back(auxv_t(SPARC_AT_ENTRY
, objFile
->entryPoint()));
486 //Different user and group IDs
487 auxv
.push_back(auxv_t(SPARC_AT_UID
, uid()));
488 auxv
.push_back(auxv_t(SPARC_AT_EUID
, euid()));
489 auxv
.push_back(auxv_t(SPARC_AT_GID
, gid()));
490 auxv
.push_back(auxv_t(SPARC_AT_EGID
, egid()));
491 //Whether to enable "secure mode" in the executable
492 auxv
.push_back(auxv_t(SPARC_AT_SECURE
, 0));
495 //Figure out how big the initial stack needs to be
497 // The unaccounted for 8 byte 0 at the top of the stack
498 int mysterious_size
= 8;
500 //This is the name of the file which is present on the initial stack
501 //It's purpose is to let the user space linker examine the original file.
502 int file_name_size
= filename
.size() + 1;
504 int env_data_size
= 0;
505 for (int i
= 0; i
< envp
.size(); ++i
) {
506 env_data_size
+= envp
[i
].size() + 1;
508 int arg_data_size
= 0;
509 for (int i
= 0; i
< argv
.size(); ++i
) {
510 arg_data_size
+= argv
[i
].size() + 1;
513 //The info_block - This seems to need an pad for some reason.
514 int info_block_size
=
518 arg_data_size
+ intSize
);
520 //Each auxilliary vector is two 4 byte words
521 int aux_array_size
= intSize
* 2 * (auxv
.size() + 1);
523 int envp_array_size
= intSize
* (envp
.size() + 1);
524 int argv_array_size
= intSize
* (argv
.size() + 1);
526 int argc_size
= intSize
;
527 int window_save_size
= intSize
* 16;
537 stack_min
= stack_base
- space_needed
;
538 stack_min
&= alignmentMask
;
539 stack_size
= stack_base
- stack_min
;
542 pTable
->allocate(roundDown(stack_min
, pageSize
),
543 roundUp(stack_size
, pageSize
));
545 // map out initial stack contents
546 uint32_t window_save_base
= stack_min
;
547 uint32_t argc_base
= window_save_base
+ window_save_size
;
548 uint32_t argv_array_base
= argc_base
+ argc_size
;
549 uint32_t envp_array_base
= argv_array_base
+ argv_array_size
;
550 uint32_t auxv_array_base
= envp_array_base
+ envp_array_size
;
551 //The info block is pushed up against the top of the stack, while
552 //the rest of the initial stack frame is aligned to an 8 byte boudary.
553 uint32_t arg_data_base
= stack_base
- info_block_size
+ intSize
;
554 uint32_t env_data_base
= arg_data_base
+ arg_data_size
;
555 uint32_t file_name_base
= env_data_base
+ env_data_size
;
556 uint32_t mysterious_base
= file_name_base
+ file_name_size
;
558 DPRINTF(Sparc
, "The addresses of items on the initial stack:\n");
559 DPRINTF(Sparc
, "0x%x - file name\n", file_name_base
);
560 DPRINTF(Sparc
, "0x%x - env data\n", env_data_base
);
561 DPRINTF(Sparc
, "0x%x - arg data\n", arg_data_base
);
562 DPRINTF(Sparc
, "0x%x - auxv array\n", auxv_array_base
);
563 DPRINTF(Sparc
, "0x%x - envp array\n", envp_array_base
);
564 DPRINTF(Sparc
, "0x%x - argv array\n", argv_array_base
);
565 DPRINTF(Sparc
, "0x%x - argc \n", argc_base
);
566 DPRINTF(Sparc
, "0x%x - window save\n", window_save_base
);
567 DPRINTF(Sparc
, "0x%x - stack min\n", stack_min
);
569 // write contents to stack
572 uint32_t argc
= argv
.size();
573 uint32_t guestArgc
= TheISA::htog(argc
);
575 //Write out the mysterious 0
576 uint64_t mysterious_zero
= 0;
577 initVirtMem
->writeBlob(mysterious_base
,
578 (uint8_t*)&mysterious_zero
, mysterious_size
);
580 //Write the file name
581 initVirtMem
->writeString(file_name_base
, filename
.c_str());
584 for(int x
= 0; x
< auxv
.size(); x
++)
586 initVirtMem
->writeBlob(auxv_array_base
+ x
* 2 * intSize
,
587 (uint8_t*)&(auxv
[x
].a_type
), intSize
);
588 initVirtMem
->writeBlob(auxv_array_base
+ (x
* 2 + 1) * intSize
,
589 (uint8_t*)&(auxv
[x
].a_val
), intSize
);
591 //Write out the terminating zeroed auxilliary vector
592 const uint64_t zero
= 0;
593 initVirtMem
->writeBlob(auxv_array_base
+ 2 * intSize
* auxv
.size(),
594 (uint8_t*)&zero
, 2 * intSize
);
596 copyStringArray(envp
, envp_array_base
, env_data_base
, initVirtMem
);
597 copyStringArray(argv
, argv_array_base
, arg_data_base
, initVirtMem
);
599 initVirtMem
->writeBlob(argc_base
, (uint8_t*)&guestArgc
, intSize
);
601 //Stuff the trap handlers into the processes address space.
602 //Since the stack grows down and is the highest area in the processes
603 //address space, we can put stuff above it and stay out of the way.
604 int fillSize
= sizeof(MachInst
) * numFillInsts
;
605 int spillSize
= sizeof(MachInst
) * numSpillInsts
;
606 fillStart
= stack_base
;
607 spillStart
= fillStart
+ fillSize
;
608 initVirtMem
->writeBlob(fillStart
, (uint8_t*)fillHandler32
, fillSize
);
609 initVirtMem
->writeBlob(spillStart
, (uint8_t*)spillHandler32
, spillSize
);
611 //Set up the thread context to start running the process
612 //assert(NumArgumentRegs >= 2);
613 //threadContexts[0]->setIntReg(ArgumentReg[0], argc);
614 //threadContexts[0]->setIntReg(ArgumentReg[1], argv_array_base);
615 threadContexts
[0]->setIntReg(StackPointerReg
, stack_min
);
617 uint32_t prog_entry
= objFile
->entryPoint();
618 threadContexts
[0]->setPC(prog_entry
);
619 threadContexts
[0]->setNextPC(prog_entry
+ sizeof(MachInst
));
620 threadContexts
[0]->setNextNPC(prog_entry
+ (2 * sizeof(MachInst
)));
622 //Align the "stack_min" to a page boundary.
623 stack_min
= roundDown(stack_min
, pageSize
);