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 "sim/process_impl.hh"
43#include "mem/translating_port.hh"
44#include "sim/system.hh"
45
46using namespace std;
47using namespace SparcISA;
48
49
50SparcLiveProcess::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)
58{
59
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);
63
64 // Set pointer for next thread stack. Reserve 8M for main stack.
65 next_thread_stack_base = stack_base - (8 * 1024 * 1024);
66
67 //Initialize these to 0s
68 fillStart = 0;
69 spillStart = 0;
70}
71
72void SparcLiveProcess::handleTrap(int trapNum, ThreadContext *tc)
73{
74 switch(trapNum)
75 {
| 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 "sim/process_impl.hh"
43#include "mem/translating_port.hh"
44#include "sim/system.hh"
45
46using namespace std;
47using namespace SparcISA;
48
49
50SparcLiveProcess::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)
58{
59
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);
63
64 // Set pointer for next thread stack. Reserve 8M for main stack.
65 next_thread_stack_base = stack_base - (8 * 1024 * 1024);
66
67 //Initialize these to 0s
68 fillStart = 0;
69 spillStart = 0;
70}
71
72void SparcLiveProcess::handleTrap(int trapNum, ThreadContext *tc)
73{
74 switch(trapNum)
75 {
|
79 default:
80 panic("Unimplemented trap to operating system: trap number %#x.\n", trapNum);
81 }
82}
83
84void
85Sparc32LiveProcess::startup()
86{
87 argsInit(32 / 8, VMPageSize);
88
89 //From the SPARC ABI
90
91 //The process runs in user mode with 32 bit addresses
92 threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x0a);
93
94 //Setup default FP state
95 threadContexts[0]->setMiscRegNoEffect(MISCREG_FSR, 0);
96
97 threadContexts[0]->setMiscRegNoEffect(MISCREG_TICK, 0);
98 //
99 /*
100 * Register window management registers
101 */
102
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);
124
125 /*
126 * T1 specific registers
127 */
128 //Turn on the icache, dcache, dtb translation, and itb translation.
129 threadContexts[0]->setMiscRegNoEffect(MISCREG_MMU_LSU_CTRL, 15);
130}
131
132void
133Sparc64LiveProcess::startup()
134{
135 argsInit(sizeof(IntReg), VMPageSize);
136
137 //From the SPARC ABI
138
139 //The process runs in user mode
140 threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x02);
141
142 //Setup default FP state
143 threadContexts[0]->setMiscRegNoEffect(MISCREG_FSR, 0);
144
145 threadContexts[0]->setMiscRegNoEffect(MISCREG_TICK, 0);
146
147 /*
148 * Register window management registers
149 */
150
151 //No windows contain info from other programs
152 //threadContexts[0]->setMiscRegNoEffect(MISCREG_OTHERWIN, 0);
153 threadContexts[0]->setIntReg(NumIntArchRegs + 6, 0);
154 //There are no windows to pop
155 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANRESTORE, 0);
156 threadContexts[0]->setIntReg(NumIntArchRegs + 4, 0);
157 //All windows are available to save into
158 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANSAVE, NWindows - 2);
159 threadContexts[0]->setIntReg(NumIntArchRegs + 3, NWindows - 2);
160 //All windows are "clean"
161 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CLEANWIN, NWindows);
162 threadContexts[0]->setIntReg(NumIntArchRegs + 5, NWindows);
163 //Start with register window 0
164 threadContexts[0]->setMiscRegNoEffect(MISCREG_CWP, 0);
165 //Always use spill and fill traps 0
166 //threadContexts[0]->setMiscRegNoEffect(MISCREG_WSTATE, 0);
167 threadContexts[0]->setIntReg(NumIntArchRegs + 7, 0);
168 //Set the trap level to 0
169 threadContexts[0]->setMiscRegNoEffect(MISCREG_TL, 0);
170 //Set the ASI register to something fixed
171 threadContexts[0]->setMiscRegNoEffect(MISCREG_ASI, ASI_PRIMARY);
172
173 /*
174 * T1 specific registers
175 */
176 //Turn on the icache, dcache, dtb translation, and itb translation.
177 threadContexts[0]->setMiscRegNoEffect(MISCREG_MMU_LSU_CTRL, 15);
178}
179
180M5_32_auxv_t::M5_32_auxv_t(int32_t type, int32_t val)
181{
182 a_type = TheISA::htog(type);
183 a_val = TheISA::htog(val);
184}
185
186M5_64_auxv_t::M5_64_auxv_t(int64_t type, int64_t val)
187{
188 a_type = TheISA::htog(type);
189 a_val = TheISA::htog(val);
190}
191
192void
193Sparc64LiveProcess::argsInit(int intSize, int pageSize)
194{
195 typedef M5_64_auxv_t auxv_t;
196 Process::startup();
197
198 string filename;
199 if(argv.size() < 1)
200 filename = "";
201 else
202 filename = argv[0];
203
204 Addr alignmentMask = ~(intSize - 1);
205
206 // load object file into target memory
207 objFile->loadSections(initVirtMem);
208
209 enum hardwareCaps
210 {
211 M5_HWCAP_SPARC_FLUSH = 1,
212 M5_HWCAP_SPARC_STBAR = 2,
213 M5_HWCAP_SPARC_SWAP = 4,
214 M5_HWCAP_SPARC_MULDIV = 8,
215 M5_HWCAP_SPARC_V9 = 16,
216 //This one should technically only be set
217 //if there is a cheetah or cheetah_plus tlb,
218 //but we'll use it all the time
219 M5_HWCAP_SPARC_ULTRA3 = 32
220 };
221
222 const int64_t hwcap =
223 M5_HWCAP_SPARC_FLUSH |
224 M5_HWCAP_SPARC_STBAR |
225 M5_HWCAP_SPARC_SWAP |
226 M5_HWCAP_SPARC_MULDIV |
227 M5_HWCAP_SPARC_V9 |
228 M5_HWCAP_SPARC_ULTRA3;
229
230
231 //Setup the auxilliary vectors. These will already have endian conversion.
232 //Auxilliary vectors are loaded only for elf formatted executables.
233 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile);
234 if(elfObject)
235 {
236 //Bits which describe the system hardware capabilities
237 auxv.push_back(auxv_t(M5_AT_HWCAP, hwcap));
238 //The system page size
239 auxv.push_back(auxv_t(M5_AT_PAGESZ, SparcISA::VMPageSize));
240 //Defined to be 100 in the kernel source.
241 //Frequency at which times() increments
242 auxv.push_back(auxv_t(M5_AT_CLKTCK, 100));
243 // For statically linked executables, this is the virtual address of the
244 // program header tables if they appear in the executable image
245 auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable()));
246 // This is the size of a program header entry from the elf file.
247 auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize()));
248 // This is the number of program headers from the original elf file.
249 auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount()));
250 //This is the address of the elf "interpreter", It should be set
251 //to 0 for regular executables. It should be something else
252 //(not sure what) for dynamic libraries.
253 auxv.push_back(auxv_t(M5_AT_BASE, 0));
254 //This is hardwired to 0 in the elf loading code in the kernel
255 auxv.push_back(auxv_t(M5_AT_FLAGS, 0));
256 //The entry point to the program
257 auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint()));
258 //Different user and group IDs
259 auxv.push_back(auxv_t(M5_AT_UID, uid()));
260 auxv.push_back(auxv_t(M5_AT_EUID, euid()));
261 auxv.push_back(auxv_t(M5_AT_GID, gid()));
262 auxv.push_back(auxv_t(M5_AT_EGID, egid()));
263 //Whether to enable "secure mode" in the executable
264 auxv.push_back(auxv_t(M5_AT_SECURE, 0));
265 }
266
267 //Figure out how big the initial stack needs to be
268
269 // The unaccounted for 0 at the top of the stack
270 int mysterious_size = intSize;
271
272 //This is the name of the file which is present on the initial stack
273 //It's purpose is to let the user space linker examine the original file.
274 int file_name_size = filename.size() + 1;
275
276 int env_data_size = 0;
277 for (int i = 0; i < envp.size(); ++i) {
278 env_data_size += envp[i].size() + 1;
279 }
280 int arg_data_size = 0;
281 for (int i = 0; i < argv.size(); ++i) {
282 arg_data_size += argv[i].size() + 1;
283 }
284
285 //The info_block needs to be padded so it's size is a multiple of the
286 //alignment mask. Also, it appears that there needs to be at least some
287 //padding, so if the size is already a multiple, we need to increase it
288 //anyway.
289 int info_block_size =
290 (file_name_size +
291 env_data_size +
292 arg_data_size +
293 intSize) & alignmentMask;
294
295 int info_block_padding =
296 info_block_size -
297 file_name_size -
298 env_data_size -
299 arg_data_size;
300
301 //Each auxilliary vector is two 8 byte words
302 int aux_array_size = intSize * 2 * (auxv.size() + 1);
303
304 int envp_array_size = intSize * (envp.size() + 1);
305 int argv_array_size = intSize * (argv.size() + 1);
306
307 int argc_size = intSize;
308 int window_save_size = intSize * 16;
309
310 int space_needed =
311 mysterious_size +
312 info_block_size +
313 aux_array_size +
314 envp_array_size +
315 argv_array_size +
316 argc_size +
317 window_save_size;
318
319 stack_min = stack_base - space_needed;
320 stack_min &= alignmentMask;
321 stack_size = stack_base - stack_min;
322
323 // map memory
324 pTable->allocate(roundDown(stack_min, pageSize),
325 roundUp(stack_size, pageSize));
326
327 // map out initial stack contents
328 Addr mysterious_base = stack_base - mysterious_size;
329 Addr file_name_base = mysterious_base - file_name_size;
330 Addr env_data_base = file_name_base - env_data_size;
331 Addr arg_data_base = env_data_base - arg_data_size;
332 Addr auxv_array_base = arg_data_base - aux_array_size - info_block_padding;
333 Addr envp_array_base = auxv_array_base - envp_array_size;
334 Addr argv_array_base = envp_array_base - argv_array_size;
335 Addr argc_base = argv_array_base - argc_size;
336#ifndef NDEBUG
337 // only used in DPRINTF
338 Addr window_save_base = argc_base - window_save_size;
339#endif
340
341 DPRINTF(Sparc, "The addresses of items on the initial stack:\n");
342 DPRINTF(Sparc, "0x%x - file name\n", file_name_base);
343 DPRINTF(Sparc, "0x%x - env data\n", env_data_base);
344 DPRINTF(Sparc, "0x%x - arg data\n", arg_data_base);
345 DPRINTF(Sparc, "0x%x - auxv array\n", auxv_array_base);
346 DPRINTF(Sparc, "0x%x - envp array\n", envp_array_base);
347 DPRINTF(Sparc, "0x%x - argv array\n", argv_array_base);
348 DPRINTF(Sparc, "0x%x - argc \n", argc_base);
349 DPRINTF(Sparc, "0x%x - window save\n", window_save_base);
350 DPRINTF(Sparc, "0x%x - stack min\n", stack_min);
351
352 // write contents to stack
353
354 // figure out argc
355 uint64_t argc = argv.size();
356 uint64_t guestArgc = TheISA::htog(argc);
357
358 //Write out the mysterious 0
359 uint64_t mysterious_zero = 0;
360 initVirtMem->writeBlob(mysterious_base,
361 (uint8_t*)&mysterious_zero, mysterious_size);
362
363 //Write the file name
364 initVirtMem->writeString(file_name_base, filename.c_str());
365
366 //Copy the aux stuff
367 for(int x = 0; x < auxv.size(); x++)
368 {
369 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize,
370 (uint8_t*)&(auxv[x].a_type), intSize);
371 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize,
372 (uint8_t*)&(auxv[x].a_val), intSize);
373 }
374 //Write out the terminating zeroed auxilliary vector
375 const uint64_t zero = 0;
376 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(),
377 (uint8_t*)&zero, 2 * intSize);
378
379 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
380 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
381
382 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize);
383
384 //Stuff the trap handlers into the processes address space.
385 //Since the stack grows down and is the highest area in the processes
386 //address space, we can put stuff above it and stay out of the way.
387 int fillSize = sizeof(MachInst) * numFillInsts;
388 int spillSize = sizeof(MachInst) * numSpillInsts;
389 fillStart = stack_base;
390 spillStart = fillStart + fillSize;
391 initVirtMem->writeBlob(fillStart, (uint8_t*)fillHandler64, fillSize);
392 initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler64, spillSize);
393
394 //Set up the thread context to start running the process
395 assert(NumArgumentRegs >= 2);
396 threadContexts[0]->setIntReg(ArgumentReg[0], argc);
397 threadContexts[0]->setIntReg(ArgumentReg[1], argv_array_base);
398 threadContexts[0]->setIntReg(StackPointerReg, stack_min - StackBias);
399
400 Addr prog_entry = objFile->entryPoint();
401 threadContexts[0]->setPC(prog_entry);
402 threadContexts[0]->setNextPC(prog_entry + sizeof(MachInst));
403 threadContexts[0]->setNextNPC(prog_entry + (2 * sizeof(MachInst)));
404
405 //Align the "stack_min" to a page boundary.
406 stack_min = roundDown(stack_min, pageSize);
407
408// num_processes++;
409}
410
411void
412Sparc32LiveProcess::argsInit(int intSize, int pageSize)
413{
414 typedef M5_32_auxv_t auxv_t;
415 Process::startup();
416
417 string filename;
418 if(argv.size() < 1)
419 filename = "";
420 else
421 filename = argv[0];
422
423 //Even though this is a 32 bit process, the ABI says we still need to
424 //maintain double word alignment of the stack pointer.
425 Addr alignmentMask = ~(8 - 1);
426
427 // load object file into target memory
428 objFile->loadSections(initVirtMem);
429
430 //These are the auxilliary vector types
431 enum auxTypes
432 {
433 SPARC_AT_HWCAP = 16,
434 SPARC_AT_PAGESZ = 6,
435 SPARC_AT_CLKTCK = 17,
436 SPARC_AT_PHDR = 3,
437 SPARC_AT_PHENT = 4,
438 SPARC_AT_PHNUM = 5,
439 SPARC_AT_BASE = 7,
440 SPARC_AT_FLAGS = 8,
441 SPARC_AT_ENTRY = 9,
442 SPARC_AT_UID = 11,
443 SPARC_AT_EUID = 12,
444 SPARC_AT_GID = 13,
445 SPARC_AT_EGID = 14,
446 SPARC_AT_SECURE = 23
447 };
448
449 enum hardwareCaps
450 {
451 M5_HWCAP_SPARC_FLUSH = 1,
452 M5_HWCAP_SPARC_STBAR = 2,
453 M5_HWCAP_SPARC_SWAP = 4,
454 M5_HWCAP_SPARC_MULDIV = 8,
455 M5_HWCAP_SPARC_V9 = 16,
456 //This one should technically only be set
457 //if there is a cheetah or cheetah_plus tlb,
458 //but we'll use it all the time
459 M5_HWCAP_SPARC_ULTRA3 = 32
460 };
461
462 const int64_t hwcap =
463 M5_HWCAP_SPARC_FLUSH |
464 M5_HWCAP_SPARC_STBAR |
465 M5_HWCAP_SPARC_SWAP |
466 M5_HWCAP_SPARC_MULDIV |
467 M5_HWCAP_SPARC_V9 |
468 M5_HWCAP_SPARC_ULTRA3;
469
470
471 //Setup the auxilliary vectors. These will already have endian conversion.
472 //Auxilliary vectors are loaded only for elf formatted executables.
473 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile);
474 if(elfObject)
475 {
476 //Bits which describe the system hardware capabilities
477 auxv.push_back(auxv_t(SPARC_AT_HWCAP, hwcap));
478 //The system page size
479 auxv.push_back(auxv_t(SPARC_AT_PAGESZ, SparcISA::VMPageSize));
480 //Defined to be 100 in the kernel source.
481 //Frequency at which times() increments
482 auxv.push_back(auxv_t(SPARC_AT_CLKTCK, 100));
483 // For statically linked executables, this is the virtual address of the
484 // program header tables if they appear in the executable image
485 auxv.push_back(auxv_t(SPARC_AT_PHDR, elfObject->programHeaderTable()));
486 // This is the size of a program header entry from the elf file.
487 auxv.push_back(auxv_t(SPARC_AT_PHENT, elfObject->programHeaderSize()));
488 // This is the number of program headers from the original elf file.
489 auxv.push_back(auxv_t(SPARC_AT_PHNUM, elfObject->programHeaderCount()));
490 //This is the address of the elf "interpreter", It should be set
491 //to 0 for regular executables. It should be something else
492 //(not sure what) for dynamic libraries.
493 auxv.push_back(auxv_t(SPARC_AT_BASE, 0));
494 //This is hardwired to 0 in the elf loading code in the kernel
495 auxv.push_back(auxv_t(SPARC_AT_FLAGS, 0));
496 //The entry point to the program
497 auxv.push_back(auxv_t(SPARC_AT_ENTRY, objFile->entryPoint()));
498 //Different user and group IDs
499 auxv.push_back(auxv_t(SPARC_AT_UID, uid()));
500 auxv.push_back(auxv_t(SPARC_AT_EUID, euid()));
501 auxv.push_back(auxv_t(SPARC_AT_GID, gid()));
502 auxv.push_back(auxv_t(SPARC_AT_EGID, egid()));
503 //Whether to enable "secure mode" in the executable
504 auxv.push_back(auxv_t(SPARC_AT_SECURE, 0));
505 }
506
507 //Figure out how big the initial stack needs to be
508
509 // The unaccounted for 8 byte 0 at the top of the stack
510 int mysterious_size = 8;
511
512 //This is the name of the file which is present on the initial stack
513 //It's purpose is to let the user space linker examine the original file.
514 int file_name_size = filename.size() + 1;
515
516 int env_data_size = 0;
517 for (int i = 0; i < envp.size(); ++i) {
518 env_data_size += envp[i].size() + 1;
519 }
520 int arg_data_size = 0;
521 for (int i = 0; i < argv.size(); ++i) {
522 arg_data_size += argv[i].size() + 1;
523 }
524
525 //The info_block - This seems to need an pad for some reason.
526 int info_block_size =
527 (mysterious_size +
528 file_name_size +
529 env_data_size +
530 arg_data_size + intSize);
531
532 //Each auxilliary vector is two 4 byte words
533 int aux_array_size = intSize * 2 * (auxv.size() + 1);
534
535 int envp_array_size = intSize * (envp.size() + 1);
536 int argv_array_size = intSize * (argv.size() + 1);
537
538 int argc_size = intSize;
539 int window_save_size = intSize * 16;
540
541 int space_needed =
542 info_block_size +
543 aux_array_size +
544 envp_array_size +
545 argv_array_size +
546 argc_size +
547 window_save_size;
548
549 stack_min = stack_base - space_needed;
550 stack_min &= alignmentMask;
551 stack_size = stack_base - stack_min;
552
553 // map memory
554 pTable->allocate(roundDown(stack_min, pageSize),
555 roundUp(stack_size, pageSize));
556
557 // map out initial stack contents
558 uint32_t window_save_base = stack_min;
559 uint32_t argc_base = window_save_base + window_save_size;
560 uint32_t argv_array_base = argc_base + argc_size;
561 uint32_t envp_array_base = argv_array_base + argv_array_size;
562 uint32_t auxv_array_base = envp_array_base + envp_array_size;
563 //The info block is pushed up against the top of the stack, while
564 //the rest of the initial stack frame is aligned to an 8 byte boudary.
565 uint32_t arg_data_base = stack_base - info_block_size + intSize;
566 uint32_t env_data_base = arg_data_base + arg_data_size;
567 uint32_t file_name_base = env_data_base + env_data_size;
568 uint32_t mysterious_base = file_name_base + file_name_size;
569
570 DPRINTF(Sparc, "The addresses of items on the initial stack:\n");
571 DPRINTF(Sparc, "0x%x - file name\n", file_name_base);
572 DPRINTF(Sparc, "0x%x - env data\n", env_data_base);
573 DPRINTF(Sparc, "0x%x - arg data\n", arg_data_base);
574 DPRINTF(Sparc, "0x%x - auxv array\n", auxv_array_base);
575 DPRINTF(Sparc, "0x%x - envp array\n", envp_array_base);
576 DPRINTF(Sparc, "0x%x - argv array\n", argv_array_base);
577 DPRINTF(Sparc, "0x%x - argc \n", argc_base);
578 DPRINTF(Sparc, "0x%x - window save\n", window_save_base);
579 DPRINTF(Sparc, "0x%x - stack min\n", stack_min);
580
581 // write contents to stack
582
583 // figure out argc
584 uint32_t argc = argv.size();
585 uint32_t guestArgc = TheISA::htog(argc);
586
587 //Write out the mysterious 0
588 uint64_t mysterious_zero = 0;
589 initVirtMem->writeBlob(mysterious_base,
590 (uint8_t*)&mysterious_zero, mysterious_size);
591
592 //Write the file name
593 initVirtMem->writeString(file_name_base, filename.c_str());
594
595 //Copy the aux stuff
596 for(int x = 0; x < auxv.size(); x++)
597 {
598 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize,
599 (uint8_t*)&(auxv[x].a_type), intSize);
600 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize,
601 (uint8_t*)&(auxv[x].a_val), intSize);
602 }
603 //Write out the terminating zeroed auxilliary vector
604 const uint64_t zero = 0;
605 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(),
606 (uint8_t*)&zero, 2 * intSize);
607
608 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
609 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
610
611 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize);
612
613 //Stuff the trap handlers into the processes address space.
614 //Since the stack grows down and is the highest area in the processes
615 //address space, we can put stuff above it and stay out of the way.
616 int fillSize = sizeof(MachInst) * numFillInsts;
617 int spillSize = sizeof(MachInst) * numSpillInsts;
618 fillStart = stack_base;
619 spillStart = fillStart + fillSize;
620 initVirtMem->writeBlob(fillStart, (uint8_t*)fillHandler32, fillSize);
621 initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler32, spillSize);
622
623 //Set up the thread context to start running the process
624 //assert(NumArgumentRegs >= 2);
625 //threadContexts[0]->setIntReg(ArgumentReg[0], argc);
626 //threadContexts[0]->setIntReg(ArgumentReg[1], argv_array_base);
627 threadContexts[0]->setIntReg(StackPointerReg, stack_min);
628
629 uint32_t prog_entry = objFile->entryPoint();
630 threadContexts[0]->setPC(prog_entry);
631 threadContexts[0]->setNextPC(prog_entry + sizeof(MachInst));
632 threadContexts[0]->setNextNPC(prog_entry + (2 * sizeof(MachInst)));
633
634 //Align the "stack_min" to a page boundary.
635 stack_min = roundDown(stack_min, pageSize);
636
637// num_processes++;
638}
| 110 default:
111 panic("Unimplemented trap to operating system: trap number %#x.\n", trapNum);
112 }
113}
114
115void
116Sparc32LiveProcess::startup()
117{
118 argsInit(32 / 8, VMPageSize);
119
120 //From the SPARC ABI
121
122 //The process runs in user mode with 32 bit addresses
123 threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x0a);
124
125 //Setup default FP state
126 threadContexts[0]->setMiscRegNoEffect(MISCREG_FSR, 0);
127
128 threadContexts[0]->setMiscRegNoEffect(MISCREG_TICK, 0);
129 //
130 /*
131 * Register window management registers
132 */
133
134 //No windows contain info from other programs
135 //threadContexts[0]->setMiscRegNoEffect(MISCREG_OTHERWIN, 0);
136 threadContexts[0]->setIntReg(NumIntArchRegs + 6, 0);
137 //There are no windows to pop
138 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANRESTORE, 0);
139 threadContexts[0]->setIntReg(NumIntArchRegs + 4, 0);
140 //All windows are available to save into
141 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANSAVE, NWindows - 2);
142 threadContexts[0]->setIntReg(NumIntArchRegs + 3, NWindows - 2);
143 //All windows are "clean"
144 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CLEANWIN, NWindows);
145 threadContexts[0]->setIntReg(NumIntArchRegs + 5, NWindows);
146 //Start with register window 0
147 threadContexts[0]->setMiscRegNoEffect(MISCREG_CWP, 0);
148 //Always use spill and fill traps 0
149 //threadContexts[0]->setMiscRegNoEffect(MISCREG_WSTATE, 0);
150 threadContexts[0]->setIntReg(NumIntArchRegs + 7, 0);
151 //Set the trap level to 0
152 threadContexts[0]->setMiscRegNoEffect(MISCREG_TL, 0);
153 //Set the ASI register to something fixed
154 threadContexts[0]->setMiscRegNoEffect(MISCREG_ASI, ASI_PRIMARY);
155
156 /*
157 * T1 specific registers
158 */
159 //Turn on the icache, dcache, dtb translation, and itb translation.
160 threadContexts[0]->setMiscRegNoEffect(MISCREG_MMU_LSU_CTRL, 15);
161}
162
163void
164Sparc64LiveProcess::startup()
165{
166 argsInit(sizeof(IntReg), VMPageSize);
167
168 //From the SPARC ABI
169
170 //The process runs in user mode
171 threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x02);
172
173 //Setup default FP state
174 threadContexts[0]->setMiscRegNoEffect(MISCREG_FSR, 0);
175
176 threadContexts[0]->setMiscRegNoEffect(MISCREG_TICK, 0);
177
178 /*
179 * Register window management registers
180 */
181
182 //No windows contain info from other programs
183 //threadContexts[0]->setMiscRegNoEffect(MISCREG_OTHERWIN, 0);
184 threadContexts[0]->setIntReg(NumIntArchRegs + 6, 0);
185 //There are no windows to pop
186 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANRESTORE, 0);
187 threadContexts[0]->setIntReg(NumIntArchRegs + 4, 0);
188 //All windows are available to save into
189 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANSAVE, NWindows - 2);
190 threadContexts[0]->setIntReg(NumIntArchRegs + 3, NWindows - 2);
191 //All windows are "clean"
192 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CLEANWIN, NWindows);
193 threadContexts[0]->setIntReg(NumIntArchRegs + 5, NWindows);
194 //Start with register window 0
195 threadContexts[0]->setMiscRegNoEffect(MISCREG_CWP, 0);
196 //Always use spill and fill traps 0
197 //threadContexts[0]->setMiscRegNoEffect(MISCREG_WSTATE, 0);
198 threadContexts[0]->setIntReg(NumIntArchRegs + 7, 0);
199 //Set the trap level to 0
200 threadContexts[0]->setMiscRegNoEffect(MISCREG_TL, 0);
201 //Set the ASI register to something fixed
202 threadContexts[0]->setMiscRegNoEffect(MISCREG_ASI, ASI_PRIMARY);
203
204 /*
205 * T1 specific registers
206 */
207 //Turn on the icache, dcache, dtb translation, and itb translation.
208 threadContexts[0]->setMiscRegNoEffect(MISCREG_MMU_LSU_CTRL, 15);
209}
210
211M5_32_auxv_t::M5_32_auxv_t(int32_t type, int32_t val)
212{
213 a_type = TheISA::htog(type);
214 a_val = TheISA::htog(val);
215}
216
217M5_64_auxv_t::M5_64_auxv_t(int64_t type, int64_t val)
218{
219 a_type = TheISA::htog(type);
220 a_val = TheISA::htog(val);
221}
222
223void
224Sparc64LiveProcess::argsInit(int intSize, int pageSize)
225{
226 typedef M5_64_auxv_t auxv_t;
227 Process::startup();
228
229 string filename;
230 if(argv.size() < 1)
231 filename = "";
232 else
233 filename = argv[0];
234
235 Addr alignmentMask = ~(intSize - 1);
236
237 // load object file into target memory
238 objFile->loadSections(initVirtMem);
239
240 enum hardwareCaps
241 {
242 M5_HWCAP_SPARC_FLUSH = 1,
243 M5_HWCAP_SPARC_STBAR = 2,
244 M5_HWCAP_SPARC_SWAP = 4,
245 M5_HWCAP_SPARC_MULDIV = 8,
246 M5_HWCAP_SPARC_V9 = 16,
247 //This one should technically only be set
248 //if there is a cheetah or cheetah_plus tlb,
249 //but we'll use it all the time
250 M5_HWCAP_SPARC_ULTRA3 = 32
251 };
252
253 const int64_t hwcap =
254 M5_HWCAP_SPARC_FLUSH |
255 M5_HWCAP_SPARC_STBAR |
256 M5_HWCAP_SPARC_SWAP |
257 M5_HWCAP_SPARC_MULDIV |
258 M5_HWCAP_SPARC_V9 |
259 M5_HWCAP_SPARC_ULTRA3;
260
261
262 //Setup the auxilliary vectors. These will already have endian conversion.
263 //Auxilliary vectors are loaded only for elf formatted executables.
264 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile);
265 if(elfObject)
266 {
267 //Bits which describe the system hardware capabilities
268 auxv.push_back(auxv_t(M5_AT_HWCAP, hwcap));
269 //The system page size
270 auxv.push_back(auxv_t(M5_AT_PAGESZ, SparcISA::VMPageSize));
271 //Defined to be 100 in the kernel source.
272 //Frequency at which times() increments
273 auxv.push_back(auxv_t(M5_AT_CLKTCK, 100));
274 // For statically linked executables, this is the virtual address of the
275 // program header tables if they appear in the executable image
276 auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable()));
277 // This is the size of a program header entry from the elf file.
278 auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize()));
279 // This is the number of program headers from the original elf file.
280 auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount()));
281 //This is the address of the elf "interpreter", It should be set
282 //to 0 for regular executables. It should be something else
283 //(not sure what) for dynamic libraries.
284 auxv.push_back(auxv_t(M5_AT_BASE, 0));
285 //This is hardwired to 0 in the elf loading code in the kernel
286 auxv.push_back(auxv_t(M5_AT_FLAGS, 0));
287 //The entry point to the program
288 auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint()));
289 //Different user and group IDs
290 auxv.push_back(auxv_t(M5_AT_UID, uid()));
291 auxv.push_back(auxv_t(M5_AT_EUID, euid()));
292 auxv.push_back(auxv_t(M5_AT_GID, gid()));
293 auxv.push_back(auxv_t(M5_AT_EGID, egid()));
294 //Whether to enable "secure mode" in the executable
295 auxv.push_back(auxv_t(M5_AT_SECURE, 0));
296 }
297
298 //Figure out how big the initial stack needs to be
299
300 // The unaccounted for 0 at the top of the stack
301 int mysterious_size = intSize;
302
303 //This is the name of the file which is present on the initial stack
304 //It's purpose is to let the user space linker examine the original file.
305 int file_name_size = filename.size() + 1;
306
307 int env_data_size = 0;
308 for (int i = 0; i < envp.size(); ++i) {
309 env_data_size += envp[i].size() + 1;
310 }
311 int arg_data_size = 0;
312 for (int i = 0; i < argv.size(); ++i) {
313 arg_data_size += argv[i].size() + 1;
314 }
315
316 //The info_block needs to be padded so it's size is a multiple of the
317 //alignment mask. Also, it appears that there needs to be at least some
318 //padding, so if the size is already a multiple, we need to increase it
319 //anyway.
320 int info_block_size =
321 (file_name_size +
322 env_data_size +
323 arg_data_size +
324 intSize) & alignmentMask;
325
326 int info_block_padding =
327 info_block_size -
328 file_name_size -
329 env_data_size -
330 arg_data_size;
331
332 //Each auxilliary vector is two 8 byte words
333 int aux_array_size = intSize * 2 * (auxv.size() + 1);
334
335 int envp_array_size = intSize * (envp.size() + 1);
336 int argv_array_size = intSize * (argv.size() + 1);
337
338 int argc_size = intSize;
339 int window_save_size = intSize * 16;
340
341 int space_needed =
342 mysterious_size +
343 info_block_size +
344 aux_array_size +
345 envp_array_size +
346 argv_array_size +
347 argc_size +
348 window_save_size;
349
350 stack_min = stack_base - space_needed;
351 stack_min &= alignmentMask;
352 stack_size = stack_base - stack_min;
353
354 // map memory
355 pTable->allocate(roundDown(stack_min, pageSize),
356 roundUp(stack_size, pageSize));
357
358 // map out initial stack contents
359 Addr mysterious_base = stack_base - mysterious_size;
360 Addr file_name_base = mysterious_base - file_name_size;
361 Addr env_data_base = file_name_base - env_data_size;
362 Addr arg_data_base = env_data_base - arg_data_size;
363 Addr auxv_array_base = arg_data_base - aux_array_size - info_block_padding;
364 Addr envp_array_base = auxv_array_base - envp_array_size;
365 Addr argv_array_base = envp_array_base - argv_array_size;
366 Addr argc_base = argv_array_base - argc_size;
367#ifndef NDEBUG
368 // only used in DPRINTF
369 Addr window_save_base = argc_base - window_save_size;
370#endif
371
372 DPRINTF(Sparc, "The addresses of items on the initial stack:\n");
373 DPRINTF(Sparc, "0x%x - file name\n", file_name_base);
374 DPRINTF(Sparc, "0x%x - env data\n", env_data_base);
375 DPRINTF(Sparc, "0x%x - arg data\n", arg_data_base);
376 DPRINTF(Sparc, "0x%x - auxv array\n", auxv_array_base);
377 DPRINTF(Sparc, "0x%x - envp array\n", envp_array_base);
378 DPRINTF(Sparc, "0x%x - argv array\n", argv_array_base);
379 DPRINTF(Sparc, "0x%x - argc \n", argc_base);
380 DPRINTF(Sparc, "0x%x - window save\n", window_save_base);
381 DPRINTF(Sparc, "0x%x - stack min\n", stack_min);
382
383 // write contents to stack
384
385 // figure out argc
386 uint64_t argc = argv.size();
387 uint64_t guestArgc = TheISA::htog(argc);
388
389 //Write out the mysterious 0
390 uint64_t mysterious_zero = 0;
391 initVirtMem->writeBlob(mysterious_base,
392 (uint8_t*)&mysterious_zero, mysterious_size);
393
394 //Write the file name
395 initVirtMem->writeString(file_name_base, filename.c_str());
396
397 //Copy the aux stuff
398 for(int x = 0; x < auxv.size(); x++)
399 {
400 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize,
401 (uint8_t*)&(auxv[x].a_type), intSize);
402 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize,
403 (uint8_t*)&(auxv[x].a_val), intSize);
404 }
405 //Write out the terminating zeroed auxilliary vector
406 const uint64_t zero = 0;
407 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(),
408 (uint8_t*)&zero, 2 * intSize);
409
410 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
411 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
412
413 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize);
414
415 //Stuff the trap handlers into the processes address space.
416 //Since the stack grows down and is the highest area in the processes
417 //address space, we can put stuff above it and stay out of the way.
418 int fillSize = sizeof(MachInst) * numFillInsts;
419 int spillSize = sizeof(MachInst) * numSpillInsts;
420 fillStart = stack_base;
421 spillStart = fillStart + fillSize;
422 initVirtMem->writeBlob(fillStart, (uint8_t*)fillHandler64, fillSize);
423 initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler64, spillSize);
424
425 //Set up the thread context to start running the process
426 assert(NumArgumentRegs >= 2);
427 threadContexts[0]->setIntReg(ArgumentReg[0], argc);
428 threadContexts[0]->setIntReg(ArgumentReg[1], argv_array_base);
429 threadContexts[0]->setIntReg(StackPointerReg, stack_min - StackBias);
430
431 Addr prog_entry = objFile->entryPoint();
432 threadContexts[0]->setPC(prog_entry);
433 threadContexts[0]->setNextPC(prog_entry + sizeof(MachInst));
434 threadContexts[0]->setNextNPC(prog_entry + (2 * sizeof(MachInst)));
435
436 //Align the "stack_min" to a page boundary.
437 stack_min = roundDown(stack_min, pageSize);
438
439// num_processes++;
440}
441
442void
443Sparc32LiveProcess::argsInit(int intSize, int pageSize)
444{
445 typedef M5_32_auxv_t auxv_t;
446 Process::startup();
447
448 string filename;
449 if(argv.size() < 1)
450 filename = "";
451 else
452 filename = argv[0];
453
454 //Even though this is a 32 bit process, the ABI says we still need to
455 //maintain double word alignment of the stack pointer.
456 Addr alignmentMask = ~(8 - 1);
457
458 // load object file into target memory
459 objFile->loadSections(initVirtMem);
460
461 //These are the auxilliary vector types
462 enum auxTypes
463 {
464 SPARC_AT_HWCAP = 16,
465 SPARC_AT_PAGESZ = 6,
466 SPARC_AT_CLKTCK = 17,
467 SPARC_AT_PHDR = 3,
468 SPARC_AT_PHENT = 4,
469 SPARC_AT_PHNUM = 5,
470 SPARC_AT_BASE = 7,
471 SPARC_AT_FLAGS = 8,
472 SPARC_AT_ENTRY = 9,
473 SPARC_AT_UID = 11,
474 SPARC_AT_EUID = 12,
475 SPARC_AT_GID = 13,
476 SPARC_AT_EGID = 14,
477 SPARC_AT_SECURE = 23
478 };
479
480 enum hardwareCaps
481 {
482 M5_HWCAP_SPARC_FLUSH = 1,
483 M5_HWCAP_SPARC_STBAR = 2,
484 M5_HWCAP_SPARC_SWAP = 4,
485 M5_HWCAP_SPARC_MULDIV = 8,
486 M5_HWCAP_SPARC_V9 = 16,
487 //This one should technically only be set
488 //if there is a cheetah or cheetah_plus tlb,
489 //but we'll use it all the time
490 M5_HWCAP_SPARC_ULTRA3 = 32
491 };
492
493 const int64_t hwcap =
494 M5_HWCAP_SPARC_FLUSH |
495 M5_HWCAP_SPARC_STBAR |
496 M5_HWCAP_SPARC_SWAP |
497 M5_HWCAP_SPARC_MULDIV |
498 M5_HWCAP_SPARC_V9 |
499 M5_HWCAP_SPARC_ULTRA3;
500
501
502 //Setup the auxilliary vectors. These will already have endian conversion.
503 //Auxilliary vectors are loaded only for elf formatted executables.
504 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile);
505 if(elfObject)
506 {
507 //Bits which describe the system hardware capabilities
508 auxv.push_back(auxv_t(SPARC_AT_HWCAP, hwcap));
509 //The system page size
510 auxv.push_back(auxv_t(SPARC_AT_PAGESZ, SparcISA::VMPageSize));
511 //Defined to be 100 in the kernel source.
512 //Frequency at which times() increments
513 auxv.push_back(auxv_t(SPARC_AT_CLKTCK, 100));
514 // For statically linked executables, this is the virtual address of the
515 // program header tables if they appear in the executable image
516 auxv.push_back(auxv_t(SPARC_AT_PHDR, elfObject->programHeaderTable()));
517 // This is the size of a program header entry from the elf file.
518 auxv.push_back(auxv_t(SPARC_AT_PHENT, elfObject->programHeaderSize()));
519 // This is the number of program headers from the original elf file.
520 auxv.push_back(auxv_t(SPARC_AT_PHNUM, elfObject->programHeaderCount()));
521 //This is the address of the elf "interpreter", It should be set
522 //to 0 for regular executables. It should be something else
523 //(not sure what) for dynamic libraries.
524 auxv.push_back(auxv_t(SPARC_AT_BASE, 0));
525 //This is hardwired to 0 in the elf loading code in the kernel
526 auxv.push_back(auxv_t(SPARC_AT_FLAGS, 0));
527 //The entry point to the program
528 auxv.push_back(auxv_t(SPARC_AT_ENTRY, objFile->entryPoint()));
529 //Different user and group IDs
530 auxv.push_back(auxv_t(SPARC_AT_UID, uid()));
531 auxv.push_back(auxv_t(SPARC_AT_EUID, euid()));
532 auxv.push_back(auxv_t(SPARC_AT_GID, gid()));
533 auxv.push_back(auxv_t(SPARC_AT_EGID, egid()));
534 //Whether to enable "secure mode" in the executable
535 auxv.push_back(auxv_t(SPARC_AT_SECURE, 0));
536 }
537
538 //Figure out how big the initial stack needs to be
539
540 // The unaccounted for 8 byte 0 at the top of the stack
541 int mysterious_size = 8;
542
543 //This is the name of the file which is present on the initial stack
544 //It's purpose is to let the user space linker examine the original file.
545 int file_name_size = filename.size() + 1;
546
547 int env_data_size = 0;
548 for (int i = 0; i < envp.size(); ++i) {
549 env_data_size += envp[i].size() + 1;
550 }
551 int arg_data_size = 0;
552 for (int i = 0; i < argv.size(); ++i) {
553 arg_data_size += argv[i].size() + 1;
554 }
555
556 //The info_block - This seems to need an pad for some reason.
557 int info_block_size =
558 (mysterious_size +
559 file_name_size +
560 env_data_size +
561 arg_data_size + intSize);
562
563 //Each auxilliary vector is two 4 byte words
564 int aux_array_size = intSize * 2 * (auxv.size() + 1);
565
566 int envp_array_size = intSize * (envp.size() + 1);
567 int argv_array_size = intSize * (argv.size() + 1);
568
569 int argc_size = intSize;
570 int window_save_size = intSize * 16;
571
572 int space_needed =
573 info_block_size +
574 aux_array_size +
575 envp_array_size +
576 argv_array_size +
577 argc_size +
578 window_save_size;
579
580 stack_min = stack_base - space_needed;
581 stack_min &= alignmentMask;
582 stack_size = stack_base - stack_min;
583
584 // map memory
585 pTable->allocate(roundDown(stack_min, pageSize),
586 roundUp(stack_size, pageSize));
587
588 // map out initial stack contents
589 uint32_t window_save_base = stack_min;
590 uint32_t argc_base = window_save_base + window_save_size;
591 uint32_t argv_array_base = argc_base + argc_size;
592 uint32_t envp_array_base = argv_array_base + argv_array_size;
593 uint32_t auxv_array_base = envp_array_base + envp_array_size;
594 //The info block is pushed up against the top of the stack, while
595 //the rest of the initial stack frame is aligned to an 8 byte boudary.
596 uint32_t arg_data_base = stack_base - info_block_size + intSize;
597 uint32_t env_data_base = arg_data_base + arg_data_size;
598 uint32_t file_name_base = env_data_base + env_data_size;
599 uint32_t mysterious_base = file_name_base + file_name_size;
600
601 DPRINTF(Sparc, "The addresses of items on the initial stack:\n");
602 DPRINTF(Sparc, "0x%x - file name\n", file_name_base);
603 DPRINTF(Sparc, "0x%x - env data\n", env_data_base);
604 DPRINTF(Sparc, "0x%x - arg data\n", arg_data_base);
605 DPRINTF(Sparc, "0x%x - auxv array\n", auxv_array_base);
606 DPRINTF(Sparc, "0x%x - envp array\n", envp_array_base);
607 DPRINTF(Sparc, "0x%x - argv array\n", argv_array_base);
608 DPRINTF(Sparc, "0x%x - argc \n", argc_base);
609 DPRINTF(Sparc, "0x%x - window save\n", window_save_base);
610 DPRINTF(Sparc, "0x%x - stack min\n", stack_min);
611
612 // write contents to stack
613
614 // figure out argc
615 uint32_t argc = argv.size();
616 uint32_t guestArgc = TheISA::htog(argc);
617
618 //Write out the mysterious 0
619 uint64_t mysterious_zero = 0;
620 initVirtMem->writeBlob(mysterious_base,
621 (uint8_t*)&mysterious_zero, mysterious_size);
622
623 //Write the file name
624 initVirtMem->writeString(file_name_base, filename.c_str());
625
626 //Copy the aux stuff
627 for(int x = 0; x < auxv.size(); x++)
628 {
629 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize,
630 (uint8_t*)&(auxv[x].a_type), intSize);
631 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize,
632 (uint8_t*)&(auxv[x].a_val), intSize);
633 }
634 //Write out the terminating zeroed auxilliary vector
635 const uint64_t zero = 0;
636 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(),
637 (uint8_t*)&zero, 2 * intSize);
638
639 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
640 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
641
642 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize);
643
644 //Stuff the trap handlers into the processes address space.
645 //Since the stack grows down and is the highest area in the processes
646 //address space, we can put stuff above it and stay out of the way.
647 int fillSize = sizeof(MachInst) * numFillInsts;
648 int spillSize = sizeof(MachInst) * numSpillInsts;
649 fillStart = stack_base;
650 spillStart = fillStart + fillSize;
651 initVirtMem->writeBlob(fillStart, (uint8_t*)fillHandler32, fillSize);
652 initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler32, spillSize);
653
654 //Set up the thread context to start running the process
655 //assert(NumArgumentRegs >= 2);
656 //threadContexts[0]->setIntReg(ArgumentReg[0], argc);
657 //threadContexts[0]->setIntReg(ArgumentReg[1], argv_array_base);
658 threadContexts[0]->setIntReg(StackPointerReg, stack_min);
659
660 uint32_t prog_entry = objFile->entryPoint();
661 threadContexts[0]->setPC(prog_entry);
662 threadContexts[0]->setNextPC(prog_entry + sizeof(MachInst));
663 threadContexts[0]->setNextNPC(prog_entry + (2 * sizeof(MachInst)));
664
665 //Align the "stack_min" to a page boundary.
666 stack_min = roundDown(stack_min, pageSize);
667
668// num_processes++;
669}
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