1/*
2 * Copyright (c) 2003-2004 The Regents of The University of Michigan
3 * All rights reserved.
4 *
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.
15 *
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
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.
27 *
28 * Authors: Gabe Black
29 * Ali Saidi
30 */
31
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 "mem/translating_port.hh"
43#include "sim/system.hh"
44
45using namespace std;
46using namespace SparcISA;
47
48
49SparcLiveProcess::SparcLiveProcess(const std::string &nm, ObjectFile *objFile,
50 System *_system, int stdin_fd, int stdout_fd, int stderr_fd,
51 std::vector<std::string> &argv, std::vector<std::string> &envp,
52 const std::string &cwd,
53 uint64_t _uid, uint64_t _euid, uint64_t _gid, uint64_t _egid,
54 uint64_t _pid, uint64_t _ppid)
55 : LiveProcess(nm, objFile, _system, stdin_fd, stdout_fd, stderr_fd,
56 argv, envp, cwd, _uid, _euid, _gid, _egid, _pid, _ppid)
57{
58
59 // XXX all the below need to be updated for SPARC - Ali
60 brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize();
61 brk_point = roundUp(brk_point, VMPageSize);
62
63 // Set pointer for next thread stack. Reserve 8M for main stack.
64 next_thread_stack_base = stack_base - (8 * 1024 * 1024);
65
66 //Initialize these to 0s
67 fillStart = 0;
68 spillStart = 0;
69}
70
71void SparcLiveProcess::handleTrap(int trapNum, ThreadContext *tc)
72{
73 switch(trapNum)
74 {
75 case 0x03: //Flush window trap
76 warn("Ignoring request to flush register windows.\n");
77 break;
78 default:
79 panic("Unimplemented trap to operating system: trap number %#x.\n", trapNum);
80 }
81}
82
83void
84Sparc32LiveProcess::startup()
85{
86 argsInit(32 / 8, VMPageSize);
87
88 //From the SPARC ABI
89
90 //The process runs in user mode
91 threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x02);
92
93 //Setup default FP state
94 threadContexts[0]->setMiscRegNoEffect(MISCREG_FSR, 0);
95
96 threadContexts[0]->setMiscRegNoEffect(MISCREG_TICK, 0);
97 //
98 /*
99 * Register window management registers
100 */
101
102 //No windows contain info from other programs
103 //threadContexts[0]->setMiscRegNoEffect(MISCREG_OTHERWIN, 0);
104 threadContexts[0]->setIntReg(NumIntArchRegs + 6, 0);
105 //There are no windows to pop
106 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANRESTORE, 0);
107 threadContexts[0]->setIntReg(NumIntArchRegs + 4, 0);
108 //All windows are available to save into
109 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANSAVE, NWindows - 2);
110 threadContexts[0]->setIntReg(NumIntArchRegs + 3, NWindows - 2);
111 //All windows are "clean"
112 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CLEANWIN, NWindows);
113 threadContexts[0]->setIntReg(NumIntArchRegs + 5, NWindows);
114 //Start with register window 0
115 threadContexts[0]->setMiscRegNoEffect(MISCREG_CWP, 0);
116 //Always use spill and fill traps 0
117 //threadContexts[0]->setMiscRegNoEffect(MISCREG_WSTATE, 0);
118 threadContexts[0]->setIntReg(NumIntArchRegs + 7, 0);
119 //Set the trap level to 0
120 threadContexts[0]->setMiscRegNoEffect(MISCREG_TL, 0);
121 //Set the ASI register to something fixed
122 threadContexts[0]->setMiscRegNoEffect(MISCREG_ASI, ASI_PRIMARY);
123}
124
125void
126Sparc64LiveProcess::startup()
127{
128 argsInit(sizeof(IntReg), VMPageSize);
129
130 //From the SPARC ABI
131
132 //The process runs in user mode
133 threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x02);
134
135 //Setup default FP state
136 threadContexts[0]->setMiscRegNoEffect(MISCREG_FSR, 0);
137
138 threadContexts[0]->setMiscRegNoEffect(MISCREG_TICK, 0);
139 //
140 /*
141 * Register window management registers
142 */
143
144 //No windows contain info from other programs
145 //threadContexts[0]->setMiscRegNoEffect(MISCREG_OTHERWIN, 0);
146 threadContexts[0]->setIntReg(NumIntArchRegs + 6, 0);
147 //There are no windows to pop
148 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANRESTORE, 0);
149 threadContexts[0]->setIntReg(NumIntArchRegs + 4, 0);
150 //All windows are available to save into
151 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANSAVE, NWindows - 2);
152 threadContexts[0]->setIntReg(NumIntArchRegs + 3, NWindows - 2);
153 //All windows are "clean"
154 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CLEANWIN, NWindows);
155 threadContexts[0]->setIntReg(NumIntArchRegs + 5, NWindows);
156 //Start with register window 0
157 threadContexts[0]->setMiscRegNoEffect(MISCREG_CWP, 0);
158 //Always use spill and fill traps 0
159 //threadContexts[0]->setMiscRegNoEffect(MISCREG_WSTATE, 0);
160 threadContexts[0]->setIntReg(NumIntArchRegs + 7, 0);
161 //Set the trap level to 0
162 threadContexts[0]->setMiscRegNoEffect(MISCREG_TL, 0);
163 //Set the ASI register to something fixed
164 threadContexts[0]->setMiscRegNoEffect(MISCREG_ASI, ASI_PRIMARY);
165}
166
167M5_32_auxv_t::M5_32_auxv_t(int32_t type, int32_t val)
168{
169 a_type = TheISA::htog(type);
170 a_val = TheISA::htog(val);
171}
172
173M5_64_auxv_t::M5_64_auxv_t(int64_t type, int64_t val)
174{
175 a_type = TheISA::htog(type);
176 a_val = TheISA::htog(val);
177}
178
179void
180Sparc64LiveProcess::argsInit(int intSize, int pageSize)
181{
182 typedef M5_64_auxv_t auxv_t;
183 Process::startup();
184
185 string filename;
186 if(argv.size() < 1)
187 filename = "";
188 else
189 filename = argv[0];
190
191 Addr alignmentMask = ~(intSize - 1);
192
193 // load object file into target memory
194 objFile->loadSections(initVirtMem);
195
196 //These are the auxilliary vector types
197 enum auxTypes
198 {
199 SPARC_AT_HWCAP = 16,
200 SPARC_AT_PAGESZ = 6,
201 SPARC_AT_CLKTCK = 17,
202 SPARC_AT_PHDR = 3,
203 SPARC_AT_PHENT = 4,
204 SPARC_AT_PHNUM = 5,
205 SPARC_AT_BASE = 7,
206 SPARC_AT_FLAGS = 8,
207 SPARC_AT_ENTRY = 9,
208 SPARC_AT_UID = 11,
209 SPARC_AT_EUID = 12,
210 SPARC_AT_GID = 13,
211 SPARC_AT_EGID = 14,
212 SPARC_AT_SECURE = 23
213 };
214
215 enum hardwareCaps
216 {
217 M5_HWCAP_SPARC_FLUSH = 1,
218 M5_HWCAP_SPARC_STBAR = 2,
219 M5_HWCAP_SPARC_SWAP = 4,
220 M5_HWCAP_SPARC_MULDIV = 8,
221 M5_HWCAP_SPARC_V9 = 16,
222 //This one should technically only be set
223 //if there is a cheetah or cheetah_plus tlb,
224 //but we'll use it all the time
225 M5_HWCAP_SPARC_ULTRA3 = 32
226 };
227
228 const int64_t hwcap =
229 M5_HWCAP_SPARC_FLUSH |
230 M5_HWCAP_SPARC_STBAR |
231 M5_HWCAP_SPARC_SWAP |
232 M5_HWCAP_SPARC_MULDIV |
233 M5_HWCAP_SPARC_V9 |
234 M5_HWCAP_SPARC_ULTRA3;
235
236
237 //Setup the auxilliary vectors. These will already have endian conversion.
238 //Auxilliary vectors are loaded only for elf formatted executables.
239 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile);
240 if(elfObject)
241 {
242 //Bits which describe the system hardware capabilities
243 auxv.push_back(auxv_t(SPARC_AT_HWCAP, hwcap));
244 //The system page size
245 auxv.push_back(auxv_t(SPARC_AT_PAGESZ, SparcISA::VMPageSize));
246 //Defined to be 100 in the kernel source.
247 //Frequency at which times() increments
248 auxv.push_back(auxv_t(SPARC_AT_CLKTCK, 100));
249 // For statically linked executables, this is the virtual address of the
250 // program header tables if they appear in the executable image
251 auxv.push_back(auxv_t(SPARC_AT_PHDR, elfObject->programHeaderTable()));
252 // This is the size of a program header entry from the elf file.
253 auxv.push_back(auxv_t(SPARC_AT_PHENT, elfObject->programHeaderSize()));
254 // This is the number of program headers from the original elf file.
255 auxv.push_back(auxv_t(SPARC_AT_PHNUM, elfObject->programHeaderCount()));
256 //This is the address of the elf "interpreter", It should be set
257 //to 0 for regular executables. It should be something else
258 //(not sure what) for dynamic libraries.
259 auxv.push_back(auxv_t(SPARC_AT_BASE, 0));
260 //This is hardwired to 0 in the elf loading code in the kernel
261 auxv.push_back(auxv_t(SPARC_AT_FLAGS, 0));
262 //The entry point to the program
263 auxv.push_back(auxv_t(SPARC_AT_ENTRY, objFile->entryPoint()));
264 //Different user and group IDs
265 auxv.push_back(auxv_t(SPARC_AT_UID, uid()));
266 auxv.push_back(auxv_t(SPARC_AT_EUID, euid()));
267 auxv.push_back(auxv_t(SPARC_AT_GID, gid()));
268 auxv.push_back(auxv_t(SPARC_AT_EGID, egid()));
269 //Whether to enable "secure mode" in the executable
270 auxv.push_back(auxv_t(SPARC_AT_SECURE, 0));
271 }
272
273 //Figure out how big the initial stack needs to be
274
275 // The unaccounted for 0 at the top of the stack
276 int mysterious_size = intSize;
277
278 //This is the name of the file which is present on the initial stack
279 //It's purpose is to let the user space linker examine the original file.
280 int file_name_size = filename.size() + 1;
281
282 int env_data_size = 0;
283 for (int i = 0; i < envp.size(); ++i) {
284 env_data_size += envp[i].size() + 1;
285 }
286 int arg_data_size = 0;
287 for (int i = 0; i < argv.size(); ++i) {
288 arg_data_size += argv[i].size() + 1;
289 }
290
291 //The info_block needs to be padded so it's size is a multiple of the
292 //alignment mask. Also, it appears that there needs to be at least some
293 //padding, so if the size is already a multiple, we need to increase it
294 //anyway.
295 int info_block_size =
296 (file_name_size +
297 env_data_size +
298 arg_data_size +
299 intSize) & alignmentMask;
300
301 int info_block_padding =
302 info_block_size -
303 file_name_size -
304 env_data_size -
305 arg_data_size;
306
307 //Each auxilliary vector is two 8 byte words
308 int aux_array_size = intSize * 2 * (auxv.size() + 1);
309
310 int envp_array_size = intSize * (envp.size() + 1);
311 int argv_array_size = intSize * (argv.size() + 1);
312
313 int argc_size = intSize;
314 int window_save_size = intSize * 16;
315
316 int space_needed =
317 mysterious_size +
318 info_block_size +
319 aux_array_size +
320 envp_array_size +
321 argv_array_size +
322 argc_size +
323 window_save_size;
324
325 stack_min = stack_base - space_needed;
326 stack_min &= alignmentMask;
327 stack_size = stack_base - stack_min;
328
329 // map memory
330 pTable->allocate(roundDown(stack_min, pageSize),
331 roundUp(stack_size, pageSize));
332
333 // map out initial stack contents
334 Addr mysterious_base = stack_base - mysterious_size;
335 Addr file_name_base = mysterious_base - file_name_size;
336 Addr env_data_base = file_name_base - env_data_size;
337 Addr arg_data_base = env_data_base - arg_data_size;
338 Addr auxv_array_base = arg_data_base - aux_array_size - info_block_padding;
339 Addr envp_array_base = auxv_array_base - envp_array_size;
340 Addr argv_array_base = envp_array_base - argv_array_size;
341 Addr argc_base = argv_array_base - argc_size;
342#ifndef NDEBUG
343 // only used in DPRINTF
344 Addr window_save_base = argc_base - window_save_size;
345#endif
346
347 DPRINTF(Sparc, "The addresses of items on the initial stack:\n");
348 DPRINTF(Sparc, "0x%x - file name\n", file_name_base);
349 DPRINTF(Sparc, "0x%x - env data\n", env_data_base);
350 DPRINTF(Sparc, "0x%x - arg data\n", arg_data_base);
351 DPRINTF(Sparc, "0x%x - auxv array\n", auxv_array_base);
352 DPRINTF(Sparc, "0x%x - envp array\n", envp_array_base);
353 DPRINTF(Sparc, "0x%x - argv array\n", argv_array_base);
354 DPRINTF(Sparc, "0x%x - argc \n", argc_base);
355 DPRINTF(Sparc, "0x%x - window save\n", window_save_base);
356 DPRINTF(Sparc, "0x%x - stack min\n", stack_min);
357
358 // write contents to stack
359
360 // figure out argc
361 uint64_t argc = argv.size();
362 uint64_t guestArgc = TheISA::htog(argc);
363
364 //Write out the mysterious 0
365 uint64_t mysterious_zero = 0;
366 initVirtMem->writeBlob(mysterious_base,
367 (uint8_t*)&mysterious_zero, mysterious_size);
368
369 //Write the file name
370 initVirtMem->writeString(file_name_base, filename.c_str());
371
372 //Copy the aux stuff
373 for(int x = 0; x < auxv.size(); x++)
374 {
375 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize,
376 (uint8_t*)&(auxv[x].a_type), intSize);
377 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize,
378 (uint8_t*)&(auxv[x].a_val), intSize);
379 }
380 //Write out the terminating zeroed auxilliary vector
381 const uint64_t zero = 0;
382 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(),
383 (uint8_t*)&zero, 2 * intSize);
384
385 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
386 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
387
388 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize);
389
390 //Stuff the trap handlers into the processes address space.
391 //Since the stack grows down and is the highest area in the processes
392 //address space, we can put stuff above it and stay out of the way.
393 int fillSize = sizeof(MachInst) * numFillInsts;
394 int spillSize = sizeof(MachInst) * numSpillInsts;
395 fillStart = stack_base;
396 spillStart = fillStart + fillSize;
397 initVirtMem->writeBlob(fillStart, (uint8_t*)fillHandler64, fillSize);
398 initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler64, spillSize);
399
400 //Set up the thread context to start running the process
401 threadContexts[0]->setIntReg(ArgumentReg0, argc);
402 threadContexts[0]->setIntReg(ArgumentReg1, argv_array_base);
403 threadContexts[0]->setIntReg(StackPointerReg, stack_min - StackBias);
404
405 Addr prog_entry = objFile->entryPoint();
406 threadContexts[0]->setPC(prog_entry);
407 threadContexts[0]->setNextPC(prog_entry + sizeof(MachInst));
408 threadContexts[0]->setNextNPC(prog_entry + (2 * sizeof(MachInst)));
409
410 //Align the "stack_min" to a page boundary.
411 stack_min = roundDown(stack_min, pageSize);
412
413// num_processes++;
414}
415
416void
417Sparc32LiveProcess::argsInit(int intSize, int pageSize)
418{
419 typedef M5_32_auxv_t auxv_t;
420 Process::startup();
421
422 string filename;
423 if(argv.size() < 1)
424 filename = "";
425 else
426 filename = argv[0];
427
428 //Even though this is a 32 bit process, the ABI says we still need to
429 //maintain double word alignment of the stack pointer.
430 Addr alignmentMask = ~(8 - 1);
431
432 // load object file into target memory
433 objFile->loadSections(initVirtMem);
434
435 //These are the auxilliary vector types
436 enum auxTypes
437 {
438 SPARC_AT_HWCAP = 16,
439 SPARC_AT_PAGESZ = 6,
440 SPARC_AT_CLKTCK = 17,
441 SPARC_AT_PHDR = 3,
442 SPARC_AT_PHENT = 4,
443 SPARC_AT_PHNUM = 5,
444 SPARC_AT_BASE = 7,
445 SPARC_AT_FLAGS = 8,
446 SPARC_AT_ENTRY = 9,
447 SPARC_AT_UID = 11,
448 SPARC_AT_EUID = 12,
449 SPARC_AT_GID = 13,
450 SPARC_AT_EGID = 14,
451 SPARC_AT_SECURE = 23
452 };
453
454 enum hardwareCaps
455 {
456 M5_HWCAP_SPARC_FLUSH = 1,
457 M5_HWCAP_SPARC_STBAR = 2,
458 M5_HWCAP_SPARC_SWAP = 4,
459 M5_HWCAP_SPARC_MULDIV = 8,
460 M5_HWCAP_SPARC_V9 = 16,
461 //This one should technically only be set
462 //if there is a cheetah or cheetah_plus tlb,
463 //but we'll use it all the time
464 M5_HWCAP_SPARC_ULTRA3 = 32
465 };
466
467 const int64_t hwcap =
468 M5_HWCAP_SPARC_FLUSH |
469 M5_HWCAP_SPARC_STBAR |
470 M5_HWCAP_SPARC_SWAP |
471 M5_HWCAP_SPARC_MULDIV |
472 M5_HWCAP_SPARC_V9 |
473 M5_HWCAP_SPARC_ULTRA3;
474
475
476 //Setup the auxilliary vectors. These will already have endian conversion.
477 //Auxilliary vectors are loaded only for elf formatted executables.
478 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile);
479 if(elfObject)
480 {
481 //Bits which describe the system hardware capabilities
482 auxv.push_back(auxv_t(SPARC_AT_HWCAP, hwcap));
483 //The system page size
484 auxv.push_back(auxv_t(SPARC_AT_PAGESZ, SparcISA::VMPageSize));
485 //Defined to be 100 in the kernel source.
486 //Frequency at which times() increments
487 auxv.push_back(auxv_t(SPARC_AT_CLKTCK, 100));
488 // For statically linked executables, this is the virtual address of the
489 // program header tables if they appear in the executable image
490 auxv.push_back(auxv_t(SPARC_AT_PHDR, elfObject->programHeaderTable()));
491 // This is the size of a program header entry from the elf file.
492 auxv.push_back(auxv_t(SPARC_AT_PHENT, elfObject->programHeaderSize()));
493 // This is the number of program headers from the original elf file.
494 auxv.push_back(auxv_t(SPARC_AT_PHNUM, elfObject->programHeaderCount()));
495 //This is the address of the elf "interpreter", It should be set
496 //to 0 for regular executables. It should be something else
497 //(not sure what) for dynamic libraries.
498 auxv.push_back(auxv_t(SPARC_AT_BASE, 0));
499 //This is hardwired to 0 in the elf loading code in the kernel
500 auxv.push_back(auxv_t(SPARC_AT_FLAGS, 0));
501 //The entry point to the program
502 auxv.push_back(auxv_t(SPARC_AT_ENTRY, objFile->entryPoint()));
503 //Different user and group IDs
504 auxv.push_back(auxv_t(SPARC_AT_UID, uid()));
505 auxv.push_back(auxv_t(SPARC_AT_EUID, euid()));
506 auxv.push_back(auxv_t(SPARC_AT_GID, gid()));
507 auxv.push_back(auxv_t(SPARC_AT_EGID, egid()));
508 //Whether to enable "secure mode" in the executable
509 auxv.push_back(auxv_t(SPARC_AT_SECURE, 0));
510 }
511
512 //Figure out how big the initial stack needs to be
513
514 // The unaccounted for 8 byte 0 at the top of the stack
515 int mysterious_size = 8;
516
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;
520
521 int env_data_size = 0;
522 for (int i = 0; i < envp.size(); ++i) {
523 env_data_size += envp[i].size() + 1;
524 }
525 int arg_data_size = 0;
526 for (int i = 0; i < argv.size(); ++i) {
527 arg_data_size += argv[i].size() + 1;
528 }
529
530 //The info_block - This seems to need an pad for some reason.
531 int info_block_size =
532 (mysterious_size +
533 file_name_size +
534 env_data_size +
535 arg_data_size + intSize);
536
537 //Each auxilliary vector is two 4 byte words
538 int aux_array_size = intSize * 2 * (auxv.size() + 1);
539
540 int envp_array_size = intSize * (envp.size() + 1);
541 int argv_array_size = intSize * (argv.size() + 1);
542
543 int argc_size = intSize;
544 int window_save_size = intSize * 16;
545
546 int space_needed =
547 info_block_size +
548 aux_array_size +
549 envp_array_size +
550 argv_array_size +
551 argc_size +
552 window_save_size;
553
554 stack_min = stack_base - space_needed;
555 stack_min &= alignmentMask;
556 stack_size = stack_base - stack_min;
557
558 // map memory
559 pTable->allocate(roundDown(stack_min, pageSize),
560 roundUp(stack_size, pageSize));
561
562 // map out initial stack contents
563 uint32_t window_save_base = stack_min;
564 uint32_t argc_base = window_save_base + window_save_size;
565 uint32_t argv_array_base = argc_base + argc_size;
566 uint32_t envp_array_base = argv_array_base + argv_array_size;
567 uint32_t auxv_array_base = envp_array_base + envp_array_size;
568 //The info block is pushed up against the top of the stack, while
569 //the rest of the initial stack frame is aligned to an 8 byte boudary.
570 uint32_t arg_data_base = stack_base - info_block_size + intSize;
571 uint32_t env_data_base = arg_data_base + arg_data_size;
572 uint32_t file_name_base = env_data_base + env_data_size;
573 uint32_t mysterious_base = file_name_base + file_name_size;
574
575 DPRINTF(Sparc, "The addresses of items on the initial stack:\n");
576 DPRINTF(Sparc, "0x%x - file name\n", file_name_base);
577 DPRINTF(Sparc, "0x%x - env data\n", env_data_base);
578 DPRINTF(Sparc, "0x%x - arg data\n", arg_data_base);
579 DPRINTF(Sparc, "0x%x - auxv array\n", auxv_array_base);
580 DPRINTF(Sparc, "0x%x - envp array\n", envp_array_base);
581 DPRINTF(Sparc, "0x%x - argv array\n", argv_array_base);
582 DPRINTF(Sparc, "0x%x - argc \n", argc_base);
583 DPRINTF(Sparc, "0x%x - window save\n", window_save_base);
584 DPRINTF(Sparc, "0x%x - stack min\n", stack_min);
585
586 // write contents to stack
587
588 // figure out argc
589 uint32_t argc = argv.size();
590 uint32_t guestArgc = TheISA::htog(argc);
591
592 //Write out the mysterious 0
593 uint64_t mysterious_zero = 0;
594 initVirtMem->writeBlob(mysterious_base,
595 (uint8_t*)&mysterious_zero, mysterious_size);
596
597 //Write the file name
598 initVirtMem->writeString(file_name_base, filename.c_str());
599
600 //Copy the aux stuff
601 for(int x = 0; x < auxv.size(); x++)
602 {
603 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize,
604 (uint8_t*)&(auxv[x].a_type), intSize);
605 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize,
606 (uint8_t*)&(auxv[x].a_val), intSize);
607 }
608 //Write out the terminating zeroed auxilliary vector
609 const uint64_t zero = 0;
610 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(),
611 (uint8_t*)&zero, 2 * intSize);
612
613 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
614 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
615
616 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize);
617
618 //Stuff the trap handlers into the processes address space.
619 //Since the stack grows down and is the highest area in the processes
620 //address space, we can put stuff above it and stay out of the way.
621 int fillSize = sizeof(MachInst) * numFillInsts;
622 int spillSize = sizeof(MachInst) * numSpillInsts;
623 fillStart = stack_base;
624 spillStart = fillStart + fillSize;
625 initVirtMem->writeBlob(fillStart, (uint8_t*)fillHandler32, fillSize);
626 initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler32, spillSize);
627
628 //Set up the thread context to start running the process
629 //threadContexts[0]->setIntReg(ArgumentReg0, argc);
630 //threadContexts[0]->setIntReg(ArgumentReg1, argv_array_base);
631 threadContexts[0]->setIntReg(StackPointerReg, stack_min);
632
633 uint32_t prog_entry = objFile->entryPoint();
634 threadContexts[0]->setPC(prog_entry);
635 threadContexts[0]->setNextPC(prog_entry + sizeof(MachInst));
636 threadContexts[0]->setNextNPC(prog_entry + (2 * sizeof(MachInst)));
637
638 //Align the "stack_min" to a page boundary.
639 stack_min = roundDown(stack_min, pageSize);
640
641// num_processes++;
642}
2 * Copyright (c) 2003-2004 The Regents of The University of Michigan
3 * All rights reserved.
4 *
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.
15 *
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
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.
27 *
28 * Authors: Gabe Black
29 * Ali Saidi
30 */
31
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 "mem/translating_port.hh"
43#include "sim/system.hh"
44
45using namespace std;
46using namespace SparcISA;
47
48
49SparcLiveProcess::SparcLiveProcess(const std::string &nm, ObjectFile *objFile,
50 System *_system, int stdin_fd, int stdout_fd, int stderr_fd,
51 std::vector<std::string> &argv, std::vector<std::string> &envp,
52 const std::string &cwd,
53 uint64_t _uid, uint64_t _euid, uint64_t _gid, uint64_t _egid,
54 uint64_t _pid, uint64_t _ppid)
55 : LiveProcess(nm, objFile, _system, stdin_fd, stdout_fd, stderr_fd,
56 argv, envp, cwd, _uid, _euid, _gid, _egid, _pid, _ppid)
57{
58
59 // XXX all the below need to be updated for SPARC - Ali
60 brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize();
61 brk_point = roundUp(brk_point, VMPageSize);
62
63 // Set pointer for next thread stack. Reserve 8M for main stack.
64 next_thread_stack_base = stack_base - (8 * 1024 * 1024);
65
66 //Initialize these to 0s
67 fillStart = 0;
68 spillStart = 0;
69}
70
71void SparcLiveProcess::handleTrap(int trapNum, ThreadContext *tc)
72{
73 switch(trapNum)
74 {
75 case 0x03: //Flush window trap
76 warn("Ignoring request to flush register windows.\n");
77 break;
78 default:
79 panic("Unimplemented trap to operating system: trap number %#x.\n", trapNum);
80 }
81}
82
83void
84Sparc32LiveProcess::startup()
85{
86 argsInit(32 / 8, VMPageSize);
87
88 //From the SPARC ABI
89
90 //The process runs in user mode
91 threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x02);
92
93 //Setup default FP state
94 threadContexts[0]->setMiscRegNoEffect(MISCREG_FSR, 0);
95
96 threadContexts[0]->setMiscRegNoEffect(MISCREG_TICK, 0);
97 //
98 /*
99 * Register window management registers
100 */
101
102 //No windows contain info from other programs
103 //threadContexts[0]->setMiscRegNoEffect(MISCREG_OTHERWIN, 0);
104 threadContexts[0]->setIntReg(NumIntArchRegs + 6, 0);
105 //There are no windows to pop
106 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANRESTORE, 0);
107 threadContexts[0]->setIntReg(NumIntArchRegs + 4, 0);
108 //All windows are available to save into
109 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANSAVE, NWindows - 2);
110 threadContexts[0]->setIntReg(NumIntArchRegs + 3, NWindows - 2);
111 //All windows are "clean"
112 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CLEANWIN, NWindows);
113 threadContexts[0]->setIntReg(NumIntArchRegs + 5, NWindows);
114 //Start with register window 0
115 threadContexts[0]->setMiscRegNoEffect(MISCREG_CWP, 0);
116 //Always use spill and fill traps 0
117 //threadContexts[0]->setMiscRegNoEffect(MISCREG_WSTATE, 0);
118 threadContexts[0]->setIntReg(NumIntArchRegs + 7, 0);
119 //Set the trap level to 0
120 threadContexts[0]->setMiscRegNoEffect(MISCREG_TL, 0);
121 //Set the ASI register to something fixed
122 threadContexts[0]->setMiscRegNoEffect(MISCREG_ASI, ASI_PRIMARY);
123}
124
125void
126Sparc64LiveProcess::startup()
127{
128 argsInit(sizeof(IntReg), VMPageSize);
129
130 //From the SPARC ABI
131
132 //The process runs in user mode
133 threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x02);
134
135 //Setup default FP state
136 threadContexts[0]->setMiscRegNoEffect(MISCREG_FSR, 0);
137
138 threadContexts[0]->setMiscRegNoEffect(MISCREG_TICK, 0);
139 //
140 /*
141 * Register window management registers
142 */
143
144 //No windows contain info from other programs
145 //threadContexts[0]->setMiscRegNoEffect(MISCREG_OTHERWIN, 0);
146 threadContexts[0]->setIntReg(NumIntArchRegs + 6, 0);
147 //There are no windows to pop
148 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANRESTORE, 0);
149 threadContexts[0]->setIntReg(NumIntArchRegs + 4, 0);
150 //All windows are available to save into
151 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANSAVE, NWindows - 2);
152 threadContexts[0]->setIntReg(NumIntArchRegs + 3, NWindows - 2);
153 //All windows are "clean"
154 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CLEANWIN, NWindows);
155 threadContexts[0]->setIntReg(NumIntArchRegs + 5, NWindows);
156 //Start with register window 0
157 threadContexts[0]->setMiscRegNoEffect(MISCREG_CWP, 0);
158 //Always use spill and fill traps 0
159 //threadContexts[0]->setMiscRegNoEffect(MISCREG_WSTATE, 0);
160 threadContexts[0]->setIntReg(NumIntArchRegs + 7, 0);
161 //Set the trap level to 0
162 threadContexts[0]->setMiscRegNoEffect(MISCREG_TL, 0);
163 //Set the ASI register to something fixed
164 threadContexts[0]->setMiscRegNoEffect(MISCREG_ASI, ASI_PRIMARY);
165}
166
167M5_32_auxv_t::M5_32_auxv_t(int32_t type, int32_t val)
168{
169 a_type = TheISA::htog(type);
170 a_val = TheISA::htog(val);
171}
172
173M5_64_auxv_t::M5_64_auxv_t(int64_t type, int64_t val)
174{
175 a_type = TheISA::htog(type);
176 a_val = TheISA::htog(val);
177}
178
179void
180Sparc64LiveProcess::argsInit(int intSize, int pageSize)
181{
182 typedef M5_64_auxv_t auxv_t;
183 Process::startup();
184
185 string filename;
186 if(argv.size() < 1)
187 filename = "";
188 else
189 filename = argv[0];
190
191 Addr alignmentMask = ~(intSize - 1);
192
193 // load object file into target memory
194 objFile->loadSections(initVirtMem);
195
196 //These are the auxilliary vector types
197 enum auxTypes
198 {
199 SPARC_AT_HWCAP = 16,
200 SPARC_AT_PAGESZ = 6,
201 SPARC_AT_CLKTCK = 17,
202 SPARC_AT_PHDR = 3,
203 SPARC_AT_PHENT = 4,
204 SPARC_AT_PHNUM = 5,
205 SPARC_AT_BASE = 7,
206 SPARC_AT_FLAGS = 8,
207 SPARC_AT_ENTRY = 9,
208 SPARC_AT_UID = 11,
209 SPARC_AT_EUID = 12,
210 SPARC_AT_GID = 13,
211 SPARC_AT_EGID = 14,
212 SPARC_AT_SECURE = 23
213 };
214
215 enum hardwareCaps
216 {
217 M5_HWCAP_SPARC_FLUSH = 1,
218 M5_HWCAP_SPARC_STBAR = 2,
219 M5_HWCAP_SPARC_SWAP = 4,
220 M5_HWCAP_SPARC_MULDIV = 8,
221 M5_HWCAP_SPARC_V9 = 16,
222 //This one should technically only be set
223 //if there is a cheetah or cheetah_plus tlb,
224 //but we'll use it all the time
225 M5_HWCAP_SPARC_ULTRA3 = 32
226 };
227
228 const int64_t hwcap =
229 M5_HWCAP_SPARC_FLUSH |
230 M5_HWCAP_SPARC_STBAR |
231 M5_HWCAP_SPARC_SWAP |
232 M5_HWCAP_SPARC_MULDIV |
233 M5_HWCAP_SPARC_V9 |
234 M5_HWCAP_SPARC_ULTRA3;
235
236
237 //Setup the auxilliary vectors. These will already have endian conversion.
238 //Auxilliary vectors are loaded only for elf formatted executables.
239 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile);
240 if(elfObject)
241 {
242 //Bits which describe the system hardware capabilities
243 auxv.push_back(auxv_t(SPARC_AT_HWCAP, hwcap));
244 //The system page size
245 auxv.push_back(auxv_t(SPARC_AT_PAGESZ, SparcISA::VMPageSize));
246 //Defined to be 100 in the kernel source.
247 //Frequency at which times() increments
248 auxv.push_back(auxv_t(SPARC_AT_CLKTCK, 100));
249 // For statically linked executables, this is the virtual address of the
250 // program header tables if they appear in the executable image
251 auxv.push_back(auxv_t(SPARC_AT_PHDR, elfObject->programHeaderTable()));
252 // This is the size of a program header entry from the elf file.
253 auxv.push_back(auxv_t(SPARC_AT_PHENT, elfObject->programHeaderSize()));
254 // This is the number of program headers from the original elf file.
255 auxv.push_back(auxv_t(SPARC_AT_PHNUM, elfObject->programHeaderCount()));
256 //This is the address of the elf "interpreter", It should be set
257 //to 0 for regular executables. It should be something else
258 //(not sure what) for dynamic libraries.
259 auxv.push_back(auxv_t(SPARC_AT_BASE, 0));
260 //This is hardwired to 0 in the elf loading code in the kernel
261 auxv.push_back(auxv_t(SPARC_AT_FLAGS, 0));
262 //The entry point to the program
263 auxv.push_back(auxv_t(SPARC_AT_ENTRY, objFile->entryPoint()));
264 //Different user and group IDs
265 auxv.push_back(auxv_t(SPARC_AT_UID, uid()));
266 auxv.push_back(auxv_t(SPARC_AT_EUID, euid()));
267 auxv.push_back(auxv_t(SPARC_AT_GID, gid()));
268 auxv.push_back(auxv_t(SPARC_AT_EGID, egid()));
269 //Whether to enable "secure mode" in the executable
270 auxv.push_back(auxv_t(SPARC_AT_SECURE, 0));
271 }
272
273 //Figure out how big the initial stack needs to be
274
275 // The unaccounted for 0 at the top of the stack
276 int mysterious_size = intSize;
277
278 //This is the name of the file which is present on the initial stack
279 //It's purpose is to let the user space linker examine the original file.
280 int file_name_size = filename.size() + 1;
281
282 int env_data_size = 0;
283 for (int i = 0; i < envp.size(); ++i) {
284 env_data_size += envp[i].size() + 1;
285 }
286 int arg_data_size = 0;
287 for (int i = 0; i < argv.size(); ++i) {
288 arg_data_size += argv[i].size() + 1;
289 }
290
291 //The info_block needs to be padded so it's size is a multiple of the
292 //alignment mask. Also, it appears that there needs to be at least some
293 //padding, so if the size is already a multiple, we need to increase it
294 //anyway.
295 int info_block_size =
296 (file_name_size +
297 env_data_size +
298 arg_data_size +
299 intSize) & alignmentMask;
300
301 int info_block_padding =
302 info_block_size -
303 file_name_size -
304 env_data_size -
305 arg_data_size;
306
307 //Each auxilliary vector is two 8 byte words
308 int aux_array_size = intSize * 2 * (auxv.size() + 1);
309
310 int envp_array_size = intSize * (envp.size() + 1);
311 int argv_array_size = intSize * (argv.size() + 1);
312
313 int argc_size = intSize;
314 int window_save_size = intSize * 16;
315
316 int space_needed =
317 mysterious_size +
318 info_block_size +
319 aux_array_size +
320 envp_array_size +
321 argv_array_size +
322 argc_size +
323 window_save_size;
324
325 stack_min = stack_base - space_needed;
326 stack_min &= alignmentMask;
327 stack_size = stack_base - stack_min;
328
329 // map memory
330 pTable->allocate(roundDown(stack_min, pageSize),
331 roundUp(stack_size, pageSize));
332
333 // map out initial stack contents
334 Addr mysterious_base = stack_base - mysterious_size;
335 Addr file_name_base = mysterious_base - file_name_size;
336 Addr env_data_base = file_name_base - env_data_size;
337 Addr arg_data_base = env_data_base - arg_data_size;
338 Addr auxv_array_base = arg_data_base - aux_array_size - info_block_padding;
339 Addr envp_array_base = auxv_array_base - envp_array_size;
340 Addr argv_array_base = envp_array_base - argv_array_size;
341 Addr argc_base = argv_array_base - argc_size;
342#ifndef NDEBUG
343 // only used in DPRINTF
344 Addr window_save_base = argc_base - window_save_size;
345#endif
346
347 DPRINTF(Sparc, "The addresses of items on the initial stack:\n");
348 DPRINTF(Sparc, "0x%x - file name\n", file_name_base);
349 DPRINTF(Sparc, "0x%x - env data\n", env_data_base);
350 DPRINTF(Sparc, "0x%x - arg data\n", arg_data_base);
351 DPRINTF(Sparc, "0x%x - auxv array\n", auxv_array_base);
352 DPRINTF(Sparc, "0x%x - envp array\n", envp_array_base);
353 DPRINTF(Sparc, "0x%x - argv array\n", argv_array_base);
354 DPRINTF(Sparc, "0x%x - argc \n", argc_base);
355 DPRINTF(Sparc, "0x%x - window save\n", window_save_base);
356 DPRINTF(Sparc, "0x%x - stack min\n", stack_min);
357
358 // write contents to stack
359
360 // figure out argc
361 uint64_t argc = argv.size();
362 uint64_t guestArgc = TheISA::htog(argc);
363
364 //Write out the mysterious 0
365 uint64_t mysterious_zero = 0;
366 initVirtMem->writeBlob(mysterious_base,
367 (uint8_t*)&mysterious_zero, mysterious_size);
368
369 //Write the file name
370 initVirtMem->writeString(file_name_base, filename.c_str());
371
372 //Copy the aux stuff
373 for(int x = 0; x < auxv.size(); x++)
374 {
375 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize,
376 (uint8_t*)&(auxv[x].a_type), intSize);
377 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize,
378 (uint8_t*)&(auxv[x].a_val), intSize);
379 }
380 //Write out the terminating zeroed auxilliary vector
381 const uint64_t zero = 0;
382 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(),
383 (uint8_t*)&zero, 2 * intSize);
384
385 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
386 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
387
388 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize);
389
390 //Stuff the trap handlers into the processes address space.
391 //Since the stack grows down and is the highest area in the processes
392 //address space, we can put stuff above it and stay out of the way.
393 int fillSize = sizeof(MachInst) * numFillInsts;
394 int spillSize = sizeof(MachInst) * numSpillInsts;
395 fillStart = stack_base;
396 spillStart = fillStart + fillSize;
397 initVirtMem->writeBlob(fillStart, (uint8_t*)fillHandler64, fillSize);
398 initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler64, spillSize);
399
400 //Set up the thread context to start running the process
401 threadContexts[0]->setIntReg(ArgumentReg0, argc);
402 threadContexts[0]->setIntReg(ArgumentReg1, argv_array_base);
403 threadContexts[0]->setIntReg(StackPointerReg, stack_min - StackBias);
404
405 Addr prog_entry = objFile->entryPoint();
406 threadContexts[0]->setPC(prog_entry);
407 threadContexts[0]->setNextPC(prog_entry + sizeof(MachInst));
408 threadContexts[0]->setNextNPC(prog_entry + (2 * sizeof(MachInst)));
409
410 //Align the "stack_min" to a page boundary.
411 stack_min = roundDown(stack_min, pageSize);
412
413// num_processes++;
414}
415
416void
417Sparc32LiveProcess::argsInit(int intSize, int pageSize)
418{
419 typedef M5_32_auxv_t auxv_t;
420 Process::startup();
421
422 string filename;
423 if(argv.size() < 1)
424 filename = "";
425 else
426 filename = argv[0];
427
428 //Even though this is a 32 bit process, the ABI says we still need to
429 //maintain double word alignment of the stack pointer.
430 Addr alignmentMask = ~(8 - 1);
431
432 // load object file into target memory
433 objFile->loadSections(initVirtMem);
434
435 //These are the auxilliary vector types
436 enum auxTypes
437 {
438 SPARC_AT_HWCAP = 16,
439 SPARC_AT_PAGESZ = 6,
440 SPARC_AT_CLKTCK = 17,
441 SPARC_AT_PHDR = 3,
442 SPARC_AT_PHENT = 4,
443 SPARC_AT_PHNUM = 5,
444 SPARC_AT_BASE = 7,
445 SPARC_AT_FLAGS = 8,
446 SPARC_AT_ENTRY = 9,
447 SPARC_AT_UID = 11,
448 SPARC_AT_EUID = 12,
449 SPARC_AT_GID = 13,
450 SPARC_AT_EGID = 14,
451 SPARC_AT_SECURE = 23
452 };
453
454 enum hardwareCaps
455 {
456 M5_HWCAP_SPARC_FLUSH = 1,
457 M5_HWCAP_SPARC_STBAR = 2,
458 M5_HWCAP_SPARC_SWAP = 4,
459 M5_HWCAP_SPARC_MULDIV = 8,
460 M5_HWCAP_SPARC_V9 = 16,
461 //This one should technically only be set
462 //if there is a cheetah or cheetah_plus tlb,
463 //but we'll use it all the time
464 M5_HWCAP_SPARC_ULTRA3 = 32
465 };
466
467 const int64_t hwcap =
468 M5_HWCAP_SPARC_FLUSH |
469 M5_HWCAP_SPARC_STBAR |
470 M5_HWCAP_SPARC_SWAP |
471 M5_HWCAP_SPARC_MULDIV |
472 M5_HWCAP_SPARC_V9 |
473 M5_HWCAP_SPARC_ULTRA3;
474
475
476 //Setup the auxilliary vectors. These will already have endian conversion.
477 //Auxilliary vectors are loaded only for elf formatted executables.
478 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile);
479 if(elfObject)
480 {
481 //Bits which describe the system hardware capabilities
482 auxv.push_back(auxv_t(SPARC_AT_HWCAP, hwcap));
483 //The system page size
484 auxv.push_back(auxv_t(SPARC_AT_PAGESZ, SparcISA::VMPageSize));
485 //Defined to be 100 in the kernel source.
486 //Frequency at which times() increments
487 auxv.push_back(auxv_t(SPARC_AT_CLKTCK, 100));
488 // For statically linked executables, this is the virtual address of the
489 // program header tables if they appear in the executable image
490 auxv.push_back(auxv_t(SPARC_AT_PHDR, elfObject->programHeaderTable()));
491 // This is the size of a program header entry from the elf file.
492 auxv.push_back(auxv_t(SPARC_AT_PHENT, elfObject->programHeaderSize()));
493 // This is the number of program headers from the original elf file.
494 auxv.push_back(auxv_t(SPARC_AT_PHNUM, elfObject->programHeaderCount()));
495 //This is the address of the elf "interpreter", It should be set
496 //to 0 for regular executables. It should be something else
497 //(not sure what) for dynamic libraries.
498 auxv.push_back(auxv_t(SPARC_AT_BASE, 0));
499 //This is hardwired to 0 in the elf loading code in the kernel
500 auxv.push_back(auxv_t(SPARC_AT_FLAGS, 0));
501 //The entry point to the program
502 auxv.push_back(auxv_t(SPARC_AT_ENTRY, objFile->entryPoint()));
503 //Different user and group IDs
504 auxv.push_back(auxv_t(SPARC_AT_UID, uid()));
505 auxv.push_back(auxv_t(SPARC_AT_EUID, euid()));
506 auxv.push_back(auxv_t(SPARC_AT_GID, gid()));
507 auxv.push_back(auxv_t(SPARC_AT_EGID, egid()));
508 //Whether to enable "secure mode" in the executable
509 auxv.push_back(auxv_t(SPARC_AT_SECURE, 0));
510 }
511
512 //Figure out how big the initial stack needs to be
513
514 // The unaccounted for 8 byte 0 at the top of the stack
515 int mysterious_size = 8;
516
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;
520
521 int env_data_size = 0;
522 for (int i = 0; i < envp.size(); ++i) {
523 env_data_size += envp[i].size() + 1;
524 }
525 int arg_data_size = 0;
526 for (int i = 0; i < argv.size(); ++i) {
527 arg_data_size += argv[i].size() + 1;
528 }
529
530 //The info_block - This seems to need an pad for some reason.
531 int info_block_size =
532 (mysterious_size +
533 file_name_size +
534 env_data_size +
535 arg_data_size + intSize);
536
537 //Each auxilliary vector is two 4 byte words
538 int aux_array_size = intSize * 2 * (auxv.size() + 1);
539
540 int envp_array_size = intSize * (envp.size() + 1);
541 int argv_array_size = intSize * (argv.size() + 1);
542
543 int argc_size = intSize;
544 int window_save_size = intSize * 16;
545
546 int space_needed =
547 info_block_size +
548 aux_array_size +
549 envp_array_size +
550 argv_array_size +
551 argc_size +
552 window_save_size;
553
554 stack_min = stack_base - space_needed;
555 stack_min &= alignmentMask;
556 stack_size = stack_base - stack_min;
557
558 // map memory
559 pTable->allocate(roundDown(stack_min, pageSize),
560 roundUp(stack_size, pageSize));
561
562 // map out initial stack contents
563 uint32_t window_save_base = stack_min;
564 uint32_t argc_base = window_save_base + window_save_size;
565 uint32_t argv_array_base = argc_base + argc_size;
566 uint32_t envp_array_base = argv_array_base + argv_array_size;
567 uint32_t auxv_array_base = envp_array_base + envp_array_size;
568 //The info block is pushed up against the top of the stack, while
569 //the rest of the initial stack frame is aligned to an 8 byte boudary.
570 uint32_t arg_data_base = stack_base - info_block_size + intSize;
571 uint32_t env_data_base = arg_data_base + arg_data_size;
572 uint32_t file_name_base = env_data_base + env_data_size;
573 uint32_t mysterious_base = file_name_base + file_name_size;
574
575 DPRINTF(Sparc, "The addresses of items on the initial stack:\n");
576 DPRINTF(Sparc, "0x%x - file name\n", file_name_base);
577 DPRINTF(Sparc, "0x%x - env data\n", env_data_base);
578 DPRINTF(Sparc, "0x%x - arg data\n", arg_data_base);
579 DPRINTF(Sparc, "0x%x - auxv array\n", auxv_array_base);
580 DPRINTF(Sparc, "0x%x - envp array\n", envp_array_base);
581 DPRINTF(Sparc, "0x%x - argv array\n", argv_array_base);
582 DPRINTF(Sparc, "0x%x - argc \n", argc_base);
583 DPRINTF(Sparc, "0x%x - window save\n", window_save_base);
584 DPRINTF(Sparc, "0x%x - stack min\n", stack_min);
585
586 // write contents to stack
587
588 // figure out argc
589 uint32_t argc = argv.size();
590 uint32_t guestArgc = TheISA::htog(argc);
591
592 //Write out the mysterious 0
593 uint64_t mysterious_zero = 0;
594 initVirtMem->writeBlob(mysterious_base,
595 (uint8_t*)&mysterious_zero, mysterious_size);
596
597 //Write the file name
598 initVirtMem->writeString(file_name_base, filename.c_str());
599
600 //Copy the aux stuff
601 for(int x = 0; x < auxv.size(); x++)
602 {
603 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize,
604 (uint8_t*)&(auxv[x].a_type), intSize);
605 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize,
606 (uint8_t*)&(auxv[x].a_val), intSize);
607 }
608 //Write out the terminating zeroed auxilliary vector
609 const uint64_t zero = 0;
610 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(),
611 (uint8_t*)&zero, 2 * intSize);
612
613 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
614 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
615
616 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize);
617
618 //Stuff the trap handlers into the processes address space.
619 //Since the stack grows down and is the highest area in the processes
620 //address space, we can put stuff above it and stay out of the way.
621 int fillSize = sizeof(MachInst) * numFillInsts;
622 int spillSize = sizeof(MachInst) * numSpillInsts;
623 fillStart = stack_base;
624 spillStart = fillStart + fillSize;
625 initVirtMem->writeBlob(fillStart, (uint8_t*)fillHandler32, fillSize);
626 initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler32, spillSize);
627
628 //Set up the thread context to start running the process
629 //threadContexts[0]->setIntReg(ArgumentReg0, argc);
630 //threadContexts[0]->setIntReg(ArgumentReg1, argv_array_base);
631 threadContexts[0]->setIntReg(StackPointerReg, stack_min);
632
633 uint32_t prog_entry = objFile->entryPoint();
634 threadContexts[0]->setPC(prog_entry);
635 threadContexts[0]->setNextPC(prog_entry + sizeof(MachInst));
636 threadContexts[0]->setNextNPC(prog_entry + (2 * sizeof(MachInst)));
637
638 //Align the "stack_min" to a page boundary.
639 stack_min = roundDown(stack_min, pageSize);
640
641// num_processes++;
642}