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(LiveProcessParams * params,
51 ObjectFile *objFile)
52 : LiveProcess(params, objFile)
53{
54
55 // XXX all the below need to be updated for SPARC - Ali
56 brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize();
57 brk_point = roundUp(brk_point, VMPageSize);
58
59 // Set pointer for next thread stack. Reserve 8M for main stack.
60 next_thread_stack_base = stack_base - (8 * 1024 * 1024);
61
62 //Initialize these to 0s
63 fillStart = 0;
64 spillStart = 0;
65}
66
67void SparcLiveProcess::handleTrap(int trapNum, ThreadContext *tc)
68{
69 switch(trapNum)
70 {
71 case 0x01: //Software breakpoint
72 warn("Software breakpoint encountered at pc %#x.\n", tc->readPC());
73 break;
74 case 0x02: //Division by zero
75 warn("Software signaled a division by zero at pc %#x.\n",
76 tc->readPC());
77 break;
78 case 0x03: //Flush window trap
79 flushWindows(tc);
80 break;
81 case 0x04: //Clean windows
82 warn("Ignoring process request for clean register "
83 "windows at pc %#x.\n", tc->readPC());
84 break;
85 case 0x05: //Range check
86 warn("Software signaled a range check at pc %#x.\n",
87 tc->readPC());
88 break;
89 case 0x06: //Fix alignment
90 warn("Ignoring process request for os assisted unaligned accesses "
91 "at pc %#x.\n", tc->readPC());
92 break;
93 case 0x07: //Integer overflow
94 warn("Software signaled an integer overflow at pc %#x.\n",
95 tc->readPC());
96 break;
97 case 0x32: //Get integer condition codes
98 warn("Ignoring process request to get the integer condition codes "
99 "at pc %#x.\n", tc->readPC());
100 break;
101 case 0x33: //Set integer condition codes
102 warn("Ignoring process request to set the integer condition codes "
103 "at pc %#x.\n", tc->readPC());
104 break;
105 default:
106 panic("Unimplemented trap to operating system: trap number %#x.\n", trapNum);
107 }
108}
109
110void
111Sparc32LiveProcess::startup()
112{
113 if (checkpointRestored)
114 return;
115
116 argsInit(32 / 8, VMPageSize);
117
118 //From the SPARC ABI
119
120 //The process runs in user mode with 32 bit addresses
121 threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x0a);
122
123 //Setup default FP state
124 threadContexts[0]->setMiscRegNoEffect(MISCREG_FSR, 0);
125
126 threadContexts[0]->setMiscRegNoEffect(MISCREG_TICK, 0);
127 //
128 /*
129 * Register window management registers
130 */
131
132 //No windows contain info from other programs
133 //threadContexts[0]->setMiscRegNoEffect(MISCREG_OTHERWIN, 0);
134 threadContexts[0]->setIntReg(NumIntArchRegs + 6, 0);
135 //There are no windows to pop
136 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANRESTORE, 0);
137 threadContexts[0]->setIntReg(NumIntArchRegs + 4, 0);
138 //All windows are available to save into
139 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANSAVE, NWindows - 2);
140 threadContexts[0]->setIntReg(NumIntArchRegs + 3, NWindows - 2);
141 //All windows are "clean"
142 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CLEANWIN, NWindows);
143 threadContexts[0]->setIntReg(NumIntArchRegs + 5, NWindows);
144 //Start with register window 0
145 threadContexts[0]->setMiscRegNoEffect(MISCREG_CWP, 0);
146 //Always use spill and fill traps 0
147 //threadContexts[0]->setMiscRegNoEffect(MISCREG_WSTATE, 0);
148 threadContexts[0]->setIntReg(NumIntArchRegs + 7, 0);
149 //Set the trap level to 0
150 threadContexts[0]->setMiscRegNoEffect(MISCREG_TL, 0);
151 //Set the ASI register to something fixed
152 threadContexts[0]->setMiscRegNoEffect(MISCREG_ASI, ASI_PRIMARY);
153
154 /*
155 * T1 specific registers
156 */
157 //Turn on the icache, dcache, dtb translation, and itb translation.
158 threadContexts[0]->setMiscRegNoEffect(MISCREG_MMU_LSU_CTRL, 15);
159}
160
161void
162Sparc64LiveProcess::startup()
163{
164 if (checkpointRestored)
165 return;
166
167 argsInit(sizeof(IntReg), VMPageSize);
168
169 //From the SPARC ABI
170
171 //The process runs in user mode
172 threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x02);
173
174 //Setup default FP state
175 threadContexts[0]->setMiscRegNoEffect(MISCREG_FSR, 0);
176
177 threadContexts[0]->setMiscRegNoEffect(MISCREG_TICK, 0);
178
179 /*
180 * Register window management registers
181 */
182
183 //No windows contain info from other programs
184 //threadContexts[0]->setMiscRegNoEffect(MISCREG_OTHERWIN, 0);
185 threadContexts[0]->setIntReg(NumIntArchRegs + 6, 0);
186 //There are no windows to pop
187 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANRESTORE, 0);
188 threadContexts[0]->setIntReg(NumIntArchRegs + 4, 0);
189 //All windows are available to save into
190 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANSAVE, NWindows - 2);
191 threadContexts[0]->setIntReg(NumIntArchRegs + 3, NWindows - 2);
192 //All windows are "clean"
193 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CLEANWIN, NWindows);
194 threadContexts[0]->setIntReg(NumIntArchRegs + 5, NWindows);
195 //Start with register window 0
196 threadContexts[0]->setMiscRegNoEffect(MISCREG_CWP, 0);
197 //Always use spill and fill traps 0
198 //threadContexts[0]->setMiscRegNoEffect(MISCREG_WSTATE, 0);
199 threadContexts[0]->setIntReg(NumIntArchRegs + 7, 0);
200 //Set the trap level to 0
201 threadContexts[0]->setMiscRegNoEffect(MISCREG_TL, 0);
202 //Set the ASI register to something fixed
203 threadContexts[0]->setMiscRegNoEffect(MISCREG_ASI, ASI_PRIMARY);
204
205 /*
206 * T1 specific registers
207 */
208 //Turn on the icache, dcache, dtb translation, and itb translation.
209 threadContexts[0]->setMiscRegNoEffect(MISCREG_MMU_LSU_CTRL, 15);
210}
211
212M5_32_auxv_t::M5_32_auxv_t(int32_t type, int32_t val)
213{
214 a_type = TheISA::htog(type);
215 a_val = TheISA::htog(val);
216}
217
218M5_64_auxv_t::M5_64_auxv_t(int64_t type, int64_t val)
219{
220 a_type = TheISA::htog(type);
221 a_val = TheISA::htog(val);
222}
223
224void
225Sparc64LiveProcess::argsInit(int intSize, int pageSize)
226{
227 typedef M5_64_auxv_t auxv_t;
228 Process::startup();
229
230 string filename;
231 if(argv.size() < 1)
232 filename = "";
233 else
234 filename = argv[0];
235
236 Addr alignmentMask = ~(intSize - 1);
237
238 // load object file into target memory
239 objFile->loadSections(initVirtMem);
240
241 enum hardwareCaps
242 {
243 M5_HWCAP_SPARC_FLUSH = 1,
244 M5_HWCAP_SPARC_STBAR = 2,
245 M5_HWCAP_SPARC_SWAP = 4,
246 M5_HWCAP_SPARC_MULDIV = 8,
247 M5_HWCAP_SPARC_V9 = 16,
248 //This one should technically only be set
249 //if there is a cheetah or cheetah_plus tlb,
250 //but we'll use it all the time
251 M5_HWCAP_SPARC_ULTRA3 = 32
252 };
253
254 const int64_t hwcap =
255 M5_HWCAP_SPARC_FLUSH |
256 M5_HWCAP_SPARC_STBAR |
257 M5_HWCAP_SPARC_SWAP |
258 M5_HWCAP_SPARC_MULDIV |
259 M5_HWCAP_SPARC_V9 |
260 M5_HWCAP_SPARC_ULTRA3;
261
262
263 //Setup the auxilliary vectors. These will already have endian conversion.
264 //Auxilliary vectors are loaded only for elf formatted executables.
265 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile);
266 if(elfObject)
267 {
268 //Bits which describe the system hardware capabilities
269 auxv.push_back(auxv_t(M5_AT_HWCAP, hwcap));
270 //The system page size
271 auxv.push_back(auxv_t(M5_AT_PAGESZ, SparcISA::VMPageSize));
272 //Defined to be 100 in the kernel source.
273 //Frequency at which times() increments
274 auxv.push_back(auxv_t(M5_AT_CLKTCK, 100));
275 // For statically linked executables, this is the virtual address of the
276 // program header tables if they appear in the executable image
277 auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable()));
278 // This is the size of a program header entry from the elf file.
279 auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize()));
280 // This is the number of program headers from the original elf file.
281 auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount()));
282 //This is the address of the elf "interpreter", It should be set
283 //to 0 for regular executables. It should be something else
284 //(not sure what) for dynamic libraries.
285 auxv.push_back(auxv_t(M5_AT_BASE, 0));
286 //This is hardwired to 0 in the elf loading code in the kernel
287 auxv.push_back(auxv_t(M5_AT_FLAGS, 0));
288 //The entry point to the program
289 auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint()));
290 //Different user and group IDs
291 auxv.push_back(auxv_t(M5_AT_UID, uid()));
292 auxv.push_back(auxv_t(M5_AT_EUID, euid()));
293 auxv.push_back(auxv_t(M5_AT_GID, gid()));
294 auxv.push_back(auxv_t(M5_AT_EGID, egid()));
295 //Whether to enable "secure mode" in the executable
296 auxv.push_back(auxv_t(M5_AT_SECURE, 0));
297 }
298
299 //Figure out how big the initial stack needs to be
300
301 // The unaccounted for 0 at the top of the stack
302 int mysterious_size = intSize;
303
304 //This is the name of the file which is present on the initial stack
305 //It's purpose is to let the user space linker examine the original file.
306 int file_name_size = filename.size() + 1;
307
308 int env_data_size = 0;
309 for (int i = 0; i < envp.size(); ++i) {
310 env_data_size += envp[i].size() + 1;
311 }
312 int arg_data_size = 0;
313 for (int i = 0; i < argv.size(); ++i) {
314 arg_data_size += argv[i].size() + 1;
315 }
316
317 //The info_block needs to be padded so it's size is a multiple of the
318 //alignment mask. Also, it appears that there needs to be at least some
319 //padding, so if the size is already a multiple, we need to increase it
320 //anyway.
321 int info_block_size =
322 (file_name_size +
323 env_data_size +
324 arg_data_size +
325 intSize) & alignmentMask;
326
327 int info_block_padding =
328 info_block_size -
329 file_name_size -
330 env_data_size -
331 arg_data_size;
332
333 //Each auxilliary vector is two 8 byte words
334 int aux_array_size = intSize * 2 * (auxv.size() + 1);
335
336 int envp_array_size = intSize * (envp.size() + 1);
337 int argv_array_size = intSize * (argv.size() + 1);
338
339 int argc_size = intSize;
340 int window_save_size = intSize * 16;
341
342 int space_needed =
343 mysterious_size +
344 info_block_size +
345 aux_array_size +
346 envp_array_size +
347 argv_array_size +
348 argc_size +
349 window_save_size;
350
351 stack_min = stack_base - space_needed;
352 stack_min &= alignmentMask;
353 stack_size = stack_base - stack_min;
354
355 // map memory
356 pTable->allocate(roundDown(stack_min, pageSize),
357 roundUp(stack_size, pageSize));
358
359 // map out initial stack contents
360 Addr mysterious_base = stack_base - mysterious_size;
361 Addr file_name_base = mysterious_base - file_name_size;
362 Addr env_data_base = file_name_base - env_data_size;
363 Addr arg_data_base = env_data_base - arg_data_size;
364 Addr auxv_array_base = arg_data_base - aux_array_size - info_block_padding;
365 Addr envp_array_base = auxv_array_base - envp_array_size;
366 Addr argv_array_base = envp_array_base - argv_array_size;
367 Addr argc_base = argv_array_base - argc_size;
368#ifndef NDEBUG
369 // only used in DPRINTF
370 Addr window_save_base = argc_base - window_save_size;
371#endif
372
373 DPRINTF(Sparc, "The addresses of items on the initial stack:\n");
374 DPRINTF(Sparc, "0x%x - file name\n", file_name_base);
375 DPRINTF(Sparc, "0x%x - env data\n", env_data_base);
376 DPRINTF(Sparc, "0x%x - arg data\n", arg_data_base);
377 DPRINTF(Sparc, "0x%x - auxv array\n", auxv_array_base);
378 DPRINTF(Sparc, "0x%x - envp array\n", envp_array_base);
379 DPRINTF(Sparc, "0x%x - argv array\n", argv_array_base);
380 DPRINTF(Sparc, "0x%x - argc \n", argc_base);
381 DPRINTF(Sparc, "0x%x - window save\n", window_save_base);
382 DPRINTF(Sparc, "0x%x - stack min\n", stack_min);
383
384 // write contents to stack
385
386 // figure out argc
387 uint64_t argc = argv.size();
388 uint64_t guestArgc = TheISA::htog(argc);
389
390 //Write out the mysterious 0
391 uint64_t mysterious_zero = 0;
392 initVirtMem->writeBlob(mysterious_base,
393 (uint8_t*)&mysterious_zero, mysterious_size);
394
395 //Write the file name
396 initVirtMem->writeString(file_name_base, filename.c_str());
397
398 //Copy the aux stuff
399 for(int x = 0; x < auxv.size(); x++)
400 {
401 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize,
402 (uint8_t*)&(auxv[x].a_type), intSize);
403 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize,
404 (uint8_t*)&(auxv[x].a_val), intSize);
405 }
406 //Write out the terminating zeroed auxilliary vector
407 const uint64_t zero = 0;
408 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(),
409 (uint8_t*)&zero, 2 * intSize);
410
411 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
412 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
413
414 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize);
415
416 //Stuff the trap handlers into the processes address space.
417 //Since the stack grows down and is the highest area in the processes
418 //address space, we can put stuff above it and stay out of the way.
419 int fillSize = sizeof(MachInst) * numFillInsts;
420 int spillSize = sizeof(MachInst) * numSpillInsts;
421 fillStart = stack_base;
422 spillStart = fillStart + fillSize;
423 initVirtMem->writeBlob(fillStart, (uint8_t*)fillHandler64, fillSize);
424 initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler64, spillSize);
425
426 //Set up the thread context to start running the process
427 assert(NumArgumentRegs >= 2);
428 threadContexts[0]->setIntReg(ArgumentReg[0], argc);
429 threadContexts[0]->setIntReg(ArgumentReg[1], argv_array_base);
430 threadContexts[0]->setIntReg(StackPointerReg, stack_min - StackBias);
431
| 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(LiveProcessParams * params,
51 ObjectFile *objFile)
52 : LiveProcess(params, objFile)
53{
54
55 // XXX all the below need to be updated for SPARC - Ali
56 brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize();
57 brk_point = roundUp(brk_point, VMPageSize);
58
59 // Set pointer for next thread stack. Reserve 8M for main stack.
60 next_thread_stack_base = stack_base - (8 * 1024 * 1024);
61
62 //Initialize these to 0s
63 fillStart = 0;
64 spillStart = 0;
65}
66
67void SparcLiveProcess::handleTrap(int trapNum, ThreadContext *tc)
68{
69 switch(trapNum)
70 {
71 case 0x01: //Software breakpoint
72 warn("Software breakpoint encountered at pc %#x.\n", tc->readPC());
73 break;
74 case 0x02: //Division by zero
75 warn("Software signaled a division by zero at pc %#x.\n",
76 tc->readPC());
77 break;
78 case 0x03: //Flush window trap
79 flushWindows(tc);
80 break;
81 case 0x04: //Clean windows
82 warn("Ignoring process request for clean register "
83 "windows at pc %#x.\n", tc->readPC());
84 break;
85 case 0x05: //Range check
86 warn("Software signaled a range check at pc %#x.\n",
87 tc->readPC());
88 break;
89 case 0x06: //Fix alignment
90 warn("Ignoring process request for os assisted unaligned accesses "
91 "at pc %#x.\n", tc->readPC());
92 break;
93 case 0x07: //Integer overflow
94 warn("Software signaled an integer overflow at pc %#x.\n",
95 tc->readPC());
96 break;
97 case 0x32: //Get integer condition codes
98 warn("Ignoring process request to get the integer condition codes "
99 "at pc %#x.\n", tc->readPC());
100 break;
101 case 0x33: //Set integer condition codes
102 warn("Ignoring process request to set the integer condition codes "
103 "at pc %#x.\n", tc->readPC());
104 break;
105 default:
106 panic("Unimplemented trap to operating system: trap number %#x.\n", trapNum);
107 }
108}
109
110void
111Sparc32LiveProcess::startup()
112{
113 if (checkpointRestored)
114 return;
115
116 argsInit(32 / 8, VMPageSize);
117
118 //From the SPARC ABI
119
120 //The process runs in user mode with 32 bit addresses
121 threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x0a);
122
123 //Setup default FP state
124 threadContexts[0]->setMiscRegNoEffect(MISCREG_FSR, 0);
125
126 threadContexts[0]->setMiscRegNoEffect(MISCREG_TICK, 0);
127 //
128 /*
129 * Register window management registers
130 */
131
132 //No windows contain info from other programs
133 //threadContexts[0]->setMiscRegNoEffect(MISCREG_OTHERWIN, 0);
134 threadContexts[0]->setIntReg(NumIntArchRegs + 6, 0);
135 //There are no windows to pop
136 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANRESTORE, 0);
137 threadContexts[0]->setIntReg(NumIntArchRegs + 4, 0);
138 //All windows are available to save into
139 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANSAVE, NWindows - 2);
140 threadContexts[0]->setIntReg(NumIntArchRegs + 3, NWindows - 2);
141 //All windows are "clean"
142 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CLEANWIN, NWindows);
143 threadContexts[0]->setIntReg(NumIntArchRegs + 5, NWindows);
144 //Start with register window 0
145 threadContexts[0]->setMiscRegNoEffect(MISCREG_CWP, 0);
146 //Always use spill and fill traps 0
147 //threadContexts[0]->setMiscRegNoEffect(MISCREG_WSTATE, 0);
148 threadContexts[0]->setIntReg(NumIntArchRegs + 7, 0);
149 //Set the trap level to 0
150 threadContexts[0]->setMiscRegNoEffect(MISCREG_TL, 0);
151 //Set the ASI register to something fixed
152 threadContexts[0]->setMiscRegNoEffect(MISCREG_ASI, ASI_PRIMARY);
153
154 /*
155 * T1 specific registers
156 */
157 //Turn on the icache, dcache, dtb translation, and itb translation.
158 threadContexts[0]->setMiscRegNoEffect(MISCREG_MMU_LSU_CTRL, 15);
159}
160
161void
162Sparc64LiveProcess::startup()
163{
164 if (checkpointRestored)
165 return;
166
167 argsInit(sizeof(IntReg), VMPageSize);
168
169 //From the SPARC ABI
170
171 //The process runs in user mode
172 threadContexts[0]->setMiscReg(MISCREG_PSTATE, 0x02);
173
174 //Setup default FP state
175 threadContexts[0]->setMiscRegNoEffect(MISCREG_FSR, 0);
176
177 threadContexts[0]->setMiscRegNoEffect(MISCREG_TICK, 0);
178
179 /*
180 * Register window management registers
181 */
182
183 //No windows contain info from other programs
184 //threadContexts[0]->setMiscRegNoEffect(MISCREG_OTHERWIN, 0);
185 threadContexts[0]->setIntReg(NumIntArchRegs + 6, 0);
186 //There are no windows to pop
187 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANRESTORE, 0);
188 threadContexts[0]->setIntReg(NumIntArchRegs + 4, 0);
189 //All windows are available to save into
190 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CANSAVE, NWindows - 2);
191 threadContexts[0]->setIntReg(NumIntArchRegs + 3, NWindows - 2);
192 //All windows are "clean"
193 //threadContexts[0]->setMiscRegNoEffect(MISCREG_CLEANWIN, NWindows);
194 threadContexts[0]->setIntReg(NumIntArchRegs + 5, NWindows);
195 //Start with register window 0
196 threadContexts[0]->setMiscRegNoEffect(MISCREG_CWP, 0);
197 //Always use spill and fill traps 0
198 //threadContexts[0]->setMiscRegNoEffect(MISCREG_WSTATE, 0);
199 threadContexts[0]->setIntReg(NumIntArchRegs + 7, 0);
200 //Set the trap level to 0
201 threadContexts[0]->setMiscRegNoEffect(MISCREG_TL, 0);
202 //Set the ASI register to something fixed
203 threadContexts[0]->setMiscRegNoEffect(MISCREG_ASI, ASI_PRIMARY);
204
205 /*
206 * T1 specific registers
207 */
208 //Turn on the icache, dcache, dtb translation, and itb translation.
209 threadContexts[0]->setMiscRegNoEffect(MISCREG_MMU_LSU_CTRL, 15);
210}
211
212M5_32_auxv_t::M5_32_auxv_t(int32_t type, int32_t val)
213{
214 a_type = TheISA::htog(type);
215 a_val = TheISA::htog(val);
216}
217
218M5_64_auxv_t::M5_64_auxv_t(int64_t type, int64_t val)
219{
220 a_type = TheISA::htog(type);
221 a_val = TheISA::htog(val);
222}
223
224void
225Sparc64LiveProcess::argsInit(int intSize, int pageSize)
226{
227 typedef M5_64_auxv_t auxv_t;
228 Process::startup();
229
230 string filename;
231 if(argv.size() < 1)
232 filename = "";
233 else
234 filename = argv[0];
235
236 Addr alignmentMask = ~(intSize - 1);
237
238 // load object file into target memory
239 objFile->loadSections(initVirtMem);
240
241 enum hardwareCaps
242 {
243 M5_HWCAP_SPARC_FLUSH = 1,
244 M5_HWCAP_SPARC_STBAR = 2,
245 M5_HWCAP_SPARC_SWAP = 4,
246 M5_HWCAP_SPARC_MULDIV = 8,
247 M5_HWCAP_SPARC_V9 = 16,
248 //This one should technically only be set
249 //if there is a cheetah or cheetah_plus tlb,
250 //but we'll use it all the time
251 M5_HWCAP_SPARC_ULTRA3 = 32
252 };
253
254 const int64_t hwcap =
255 M5_HWCAP_SPARC_FLUSH |
256 M5_HWCAP_SPARC_STBAR |
257 M5_HWCAP_SPARC_SWAP |
258 M5_HWCAP_SPARC_MULDIV |
259 M5_HWCAP_SPARC_V9 |
260 M5_HWCAP_SPARC_ULTRA3;
261
262
263 //Setup the auxilliary vectors. These will already have endian conversion.
264 //Auxilliary vectors are loaded only for elf formatted executables.
265 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile);
266 if(elfObject)
267 {
268 //Bits which describe the system hardware capabilities
269 auxv.push_back(auxv_t(M5_AT_HWCAP, hwcap));
270 //The system page size
271 auxv.push_back(auxv_t(M5_AT_PAGESZ, SparcISA::VMPageSize));
272 //Defined to be 100 in the kernel source.
273 //Frequency at which times() increments
274 auxv.push_back(auxv_t(M5_AT_CLKTCK, 100));
275 // For statically linked executables, this is the virtual address of the
276 // program header tables if they appear in the executable image
277 auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable()));
278 // This is the size of a program header entry from the elf file.
279 auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize()));
280 // This is the number of program headers from the original elf file.
281 auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount()));
282 //This is the address of the elf "interpreter", It should be set
283 //to 0 for regular executables. It should be something else
284 //(not sure what) for dynamic libraries.
285 auxv.push_back(auxv_t(M5_AT_BASE, 0));
286 //This is hardwired to 0 in the elf loading code in the kernel
287 auxv.push_back(auxv_t(M5_AT_FLAGS, 0));
288 //The entry point to the program
289 auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint()));
290 //Different user and group IDs
291 auxv.push_back(auxv_t(M5_AT_UID, uid()));
292 auxv.push_back(auxv_t(M5_AT_EUID, euid()));
293 auxv.push_back(auxv_t(M5_AT_GID, gid()));
294 auxv.push_back(auxv_t(M5_AT_EGID, egid()));
295 //Whether to enable "secure mode" in the executable
296 auxv.push_back(auxv_t(M5_AT_SECURE, 0));
297 }
298
299 //Figure out how big the initial stack needs to be
300
301 // The unaccounted for 0 at the top of the stack
302 int mysterious_size = intSize;
303
304 //This is the name of the file which is present on the initial stack
305 //It's purpose is to let the user space linker examine the original file.
306 int file_name_size = filename.size() + 1;
307
308 int env_data_size = 0;
309 for (int i = 0; i < envp.size(); ++i) {
310 env_data_size += envp[i].size() + 1;
311 }
312 int arg_data_size = 0;
313 for (int i = 0; i < argv.size(); ++i) {
314 arg_data_size += argv[i].size() + 1;
315 }
316
317 //The info_block needs to be padded so it's size is a multiple of the
318 //alignment mask. Also, it appears that there needs to be at least some
319 //padding, so if the size is already a multiple, we need to increase it
320 //anyway.
321 int info_block_size =
322 (file_name_size +
323 env_data_size +
324 arg_data_size +
325 intSize) & alignmentMask;
326
327 int info_block_padding =
328 info_block_size -
329 file_name_size -
330 env_data_size -
331 arg_data_size;
332
333 //Each auxilliary vector is two 8 byte words
334 int aux_array_size = intSize * 2 * (auxv.size() + 1);
335
336 int envp_array_size = intSize * (envp.size() + 1);
337 int argv_array_size = intSize * (argv.size() + 1);
338
339 int argc_size = intSize;
340 int window_save_size = intSize * 16;
341
342 int space_needed =
343 mysterious_size +
344 info_block_size +
345 aux_array_size +
346 envp_array_size +
347 argv_array_size +
348 argc_size +
349 window_save_size;
350
351 stack_min = stack_base - space_needed;
352 stack_min &= alignmentMask;
353 stack_size = stack_base - stack_min;
354
355 // map memory
356 pTable->allocate(roundDown(stack_min, pageSize),
357 roundUp(stack_size, pageSize));
358
359 // map out initial stack contents
360 Addr mysterious_base = stack_base - mysterious_size;
361 Addr file_name_base = mysterious_base - file_name_size;
362 Addr env_data_base = file_name_base - env_data_size;
363 Addr arg_data_base = env_data_base - arg_data_size;
364 Addr auxv_array_base = arg_data_base - aux_array_size - info_block_padding;
365 Addr envp_array_base = auxv_array_base - envp_array_size;
366 Addr argv_array_base = envp_array_base - argv_array_size;
367 Addr argc_base = argv_array_base - argc_size;
368#ifndef NDEBUG
369 // only used in DPRINTF
370 Addr window_save_base = argc_base - window_save_size;
371#endif
372
373 DPRINTF(Sparc, "The addresses of items on the initial stack:\n");
374 DPRINTF(Sparc, "0x%x - file name\n", file_name_base);
375 DPRINTF(Sparc, "0x%x - env data\n", env_data_base);
376 DPRINTF(Sparc, "0x%x - arg data\n", arg_data_base);
377 DPRINTF(Sparc, "0x%x - auxv array\n", auxv_array_base);
378 DPRINTF(Sparc, "0x%x - envp array\n", envp_array_base);
379 DPRINTF(Sparc, "0x%x - argv array\n", argv_array_base);
380 DPRINTF(Sparc, "0x%x - argc \n", argc_base);
381 DPRINTF(Sparc, "0x%x - window save\n", window_save_base);
382 DPRINTF(Sparc, "0x%x - stack min\n", stack_min);
383
384 // write contents to stack
385
386 // figure out argc
387 uint64_t argc = argv.size();
388 uint64_t guestArgc = TheISA::htog(argc);
389
390 //Write out the mysterious 0
391 uint64_t mysterious_zero = 0;
392 initVirtMem->writeBlob(mysterious_base,
393 (uint8_t*)&mysterious_zero, mysterious_size);
394
395 //Write the file name
396 initVirtMem->writeString(file_name_base, filename.c_str());
397
398 //Copy the aux stuff
399 for(int x = 0; x < auxv.size(); x++)
400 {
401 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize,
402 (uint8_t*)&(auxv[x].a_type), intSize);
403 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize,
404 (uint8_t*)&(auxv[x].a_val), intSize);
405 }
406 //Write out the terminating zeroed auxilliary vector
407 const uint64_t zero = 0;
408 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(),
409 (uint8_t*)&zero, 2 * intSize);
410
411 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
412 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
413
414 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize);
415
416 //Stuff the trap handlers into the processes address space.
417 //Since the stack grows down and is the highest area in the processes
418 //address space, we can put stuff above it and stay out of the way.
419 int fillSize = sizeof(MachInst) * numFillInsts;
420 int spillSize = sizeof(MachInst) * numSpillInsts;
421 fillStart = stack_base;
422 spillStart = fillStart + fillSize;
423 initVirtMem->writeBlob(fillStart, (uint8_t*)fillHandler64, fillSize);
424 initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler64, spillSize);
425
426 //Set up the thread context to start running the process
427 assert(NumArgumentRegs >= 2);
428 threadContexts[0]->setIntReg(ArgumentReg[0], argc);
429 threadContexts[0]->setIntReg(ArgumentReg[1], argv_array_base);
430 threadContexts[0]->setIntReg(StackPointerReg, stack_min - StackBias);
431
|
432 Addr prog_entry = objFile->entryPoint();
433 threadContexts[0]->setPC(prog_entry);
434 threadContexts[0]->setNextPC(prog_entry + sizeof(MachInst));
435 threadContexts[0]->setNextNPC(prog_entry + (2 * sizeof(MachInst)));
436
437 //Align the "stack_min" to a page boundary.
438 stack_min = roundDown(stack_min, pageSize);
439
440// num_processes++;
441}
442
443void
444Sparc32LiveProcess::argsInit(int intSize, int pageSize)
445{
446 typedef M5_32_auxv_t auxv_t;
447 Process::startup();
448
449 string filename;
450 if(argv.size() < 1)
451 filename = "";
452 else
453 filename = argv[0];
454
455 //Even though this is a 32 bit process, the ABI says we still need to
456 //maintain double word alignment of the stack pointer.
457 Addr alignmentMask = ~(8 - 1);
458
459 // load object file into target memory
460 objFile->loadSections(initVirtMem);
461
462 //These are the auxilliary vector types
463 enum auxTypes
464 {
465 SPARC_AT_HWCAP = 16,
466 SPARC_AT_PAGESZ = 6,
467 SPARC_AT_CLKTCK = 17,
468 SPARC_AT_PHDR = 3,
469 SPARC_AT_PHENT = 4,
470 SPARC_AT_PHNUM = 5,
471 SPARC_AT_BASE = 7,
472 SPARC_AT_FLAGS = 8,
473 SPARC_AT_ENTRY = 9,
474 SPARC_AT_UID = 11,
475 SPARC_AT_EUID = 12,
476 SPARC_AT_GID = 13,
477 SPARC_AT_EGID = 14,
478 SPARC_AT_SECURE = 23
479 };
480
481 enum hardwareCaps
482 {
483 M5_HWCAP_SPARC_FLUSH = 1,
484 M5_HWCAP_SPARC_STBAR = 2,
485 M5_HWCAP_SPARC_SWAP = 4,
486 M5_HWCAP_SPARC_MULDIV = 8,
487 M5_HWCAP_SPARC_V9 = 16,
488 //This one should technically only be set
489 //if there is a cheetah or cheetah_plus tlb,
490 //but we'll use it all the time
491 M5_HWCAP_SPARC_ULTRA3 = 32
492 };
493
494 const int64_t hwcap =
495 M5_HWCAP_SPARC_FLUSH |
496 M5_HWCAP_SPARC_STBAR |
497 M5_HWCAP_SPARC_SWAP |
498 M5_HWCAP_SPARC_MULDIV |
499 M5_HWCAP_SPARC_V9 |
500 M5_HWCAP_SPARC_ULTRA3;
501
502
503 //Setup the auxilliary vectors. These will already have endian conversion.
504 //Auxilliary vectors are loaded only for elf formatted executables.
505 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile);
506 if(elfObject)
507 {
508 //Bits which describe the system hardware capabilities
509 auxv.push_back(auxv_t(SPARC_AT_HWCAP, hwcap));
510 //The system page size
511 auxv.push_back(auxv_t(SPARC_AT_PAGESZ, SparcISA::VMPageSize));
512 //Defined to be 100 in the kernel source.
513 //Frequency at which times() increments
514 auxv.push_back(auxv_t(SPARC_AT_CLKTCK, 100));
515 // For statically linked executables, this is the virtual address of the
516 // program header tables if they appear in the executable image
517 auxv.push_back(auxv_t(SPARC_AT_PHDR, elfObject->programHeaderTable()));
518 // This is the size of a program header entry from the elf file.
519 auxv.push_back(auxv_t(SPARC_AT_PHENT, elfObject->programHeaderSize()));
520 // This is the number of program headers from the original elf file.
521 auxv.push_back(auxv_t(SPARC_AT_PHNUM, elfObject->programHeaderCount()));
522 //This is the address of the elf "interpreter", It should be set
523 //to 0 for regular executables. It should be something else
524 //(not sure what) for dynamic libraries.
525 auxv.push_back(auxv_t(SPARC_AT_BASE, 0));
526 //This is hardwired to 0 in the elf loading code in the kernel
527 auxv.push_back(auxv_t(SPARC_AT_FLAGS, 0));
528 //The entry point to the program
529 auxv.push_back(auxv_t(SPARC_AT_ENTRY, objFile->entryPoint()));
530 //Different user and group IDs
531 auxv.push_back(auxv_t(SPARC_AT_UID, uid()));
532 auxv.push_back(auxv_t(SPARC_AT_EUID, euid()));
533 auxv.push_back(auxv_t(SPARC_AT_GID, gid()));
534 auxv.push_back(auxv_t(SPARC_AT_EGID, egid()));
535 //Whether to enable "secure mode" in the executable
536 auxv.push_back(auxv_t(SPARC_AT_SECURE, 0));
537 }
538
539 //Figure out how big the initial stack needs to be
540
541 // The unaccounted for 8 byte 0 at the top of the stack
542 int mysterious_size = 8;
543
544 //This is the name of the file which is present on the initial stack
545 //It's purpose is to let the user space linker examine the original file.
546 int file_name_size = filename.size() + 1;
547
548 int env_data_size = 0;
549 for (int i = 0; i < envp.size(); ++i) {
550 env_data_size += envp[i].size() + 1;
551 }
552 int arg_data_size = 0;
553 for (int i = 0; i < argv.size(); ++i) {
554 arg_data_size += argv[i].size() + 1;
555 }
556
557 //The info_block - This seems to need an pad for some reason.
558 int info_block_size =
559 (mysterious_size +
560 file_name_size +
561 env_data_size +
562 arg_data_size + intSize);
563
564 //Each auxilliary vector is two 4 byte words
565 int aux_array_size = intSize * 2 * (auxv.size() + 1);
566
567 int envp_array_size = intSize * (envp.size() + 1);
568 int argv_array_size = intSize * (argv.size() + 1);
569
570 int argc_size = intSize;
571 int window_save_size = intSize * 16;
572
573 int space_needed =
574 info_block_size +
575 aux_array_size +
576 envp_array_size +
577 argv_array_size +
578 argc_size +
579 window_save_size;
580
581 stack_min = stack_base - space_needed;
582 stack_min &= alignmentMask;
583 stack_size = stack_base - stack_min;
584
585 // map memory
586 pTable->allocate(roundDown(stack_min, pageSize),
587 roundUp(stack_size, pageSize));
588
589 // map out initial stack contents
590 uint32_t window_save_base = stack_min;
591 uint32_t argc_base = window_save_base + window_save_size;
592 uint32_t argv_array_base = argc_base + argc_size;
593 uint32_t envp_array_base = argv_array_base + argv_array_size;
594 uint32_t auxv_array_base = envp_array_base + envp_array_size;
595 //The info block is pushed up against the top of the stack, while
596 //the rest of the initial stack frame is aligned to an 8 byte boudary.
597 uint32_t arg_data_base = stack_base - info_block_size + intSize;
598 uint32_t env_data_base = arg_data_base + arg_data_size;
599 uint32_t file_name_base = env_data_base + env_data_size;
600 uint32_t mysterious_base = file_name_base + file_name_size;
601
602 DPRINTF(Sparc, "The addresses of items on the initial stack:\n");
603 DPRINTF(Sparc, "0x%x - file name\n", file_name_base);
604 DPRINTF(Sparc, "0x%x - env data\n", env_data_base);
605 DPRINTF(Sparc, "0x%x - arg data\n", arg_data_base);
606 DPRINTF(Sparc, "0x%x - auxv array\n", auxv_array_base);
607 DPRINTF(Sparc, "0x%x - envp array\n", envp_array_base);
608 DPRINTF(Sparc, "0x%x - argv array\n", argv_array_base);
609 DPRINTF(Sparc, "0x%x - argc \n", argc_base);
610 DPRINTF(Sparc, "0x%x - window save\n", window_save_base);
611 DPRINTF(Sparc, "0x%x - stack min\n", stack_min);
612
613 // write contents to stack
614
615 // figure out argc
616 uint32_t argc = argv.size();
617 uint32_t guestArgc = TheISA::htog(argc);
618
619 //Write out the mysterious 0
620 uint64_t mysterious_zero = 0;
621 initVirtMem->writeBlob(mysterious_base,
622 (uint8_t*)&mysterious_zero, mysterious_size);
623
624 //Write the file name
625 initVirtMem->writeString(file_name_base, filename.c_str());
626
627 //Copy the aux stuff
628 for(int x = 0; x < auxv.size(); x++)
629 {
630 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize,
631 (uint8_t*)&(auxv[x].a_type), intSize);
632 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize,
633 (uint8_t*)&(auxv[x].a_val), intSize);
634 }
635 //Write out the terminating zeroed auxilliary vector
636 const uint64_t zero = 0;
637 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(),
638 (uint8_t*)&zero, 2 * intSize);
639
640 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
641 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
642
643 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize);
644
645 //Stuff the trap handlers into the processes address space.
646 //Since the stack grows down and is the highest area in the processes
647 //address space, we can put stuff above it and stay out of the way.
648 int fillSize = sizeof(MachInst) * numFillInsts;
649 int spillSize = sizeof(MachInst) * numSpillInsts;
650 fillStart = stack_base;
651 spillStart = fillStart + fillSize;
652 initVirtMem->writeBlob(fillStart, (uint8_t*)fillHandler32, fillSize);
653 initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler32, spillSize);
654
655 //Set up the thread context to start running the process
656 //assert(NumArgumentRegs >= 2);
657 //threadContexts[0]->setIntReg(ArgumentReg[0], argc);
658 //threadContexts[0]->setIntReg(ArgumentReg[1], argv_array_base);
659 threadContexts[0]->setIntReg(StackPointerReg, stack_min);
660
| 436 Addr prog_entry = objFile->entryPoint();
437 threadContexts[0]->setPC(prog_entry);
438 threadContexts[0]->setNextPC(prog_entry + sizeof(MachInst));
439 threadContexts[0]->setNextNPC(prog_entry + (2 * sizeof(MachInst)));
440
441 //Align the "stack_min" to a page boundary.
442 stack_min = roundDown(stack_min, pageSize);
443
444// num_processes++;
445}
446
447void
448Sparc32LiveProcess::argsInit(int intSize, int pageSize)
449{
450 typedef M5_32_auxv_t auxv_t;
451 Process::startup();
452
453 string filename;
454 if(argv.size() < 1)
455 filename = "";
456 else
457 filename = argv[0];
458
459 //Even though this is a 32 bit process, the ABI says we still need to
460 //maintain double word alignment of the stack pointer.
461 Addr alignmentMask = ~(8 - 1);
462
463 // load object file into target memory
464 objFile->loadSections(initVirtMem);
465
466 //These are the auxilliary vector types
467 enum auxTypes
468 {
469 SPARC_AT_HWCAP = 16,
470 SPARC_AT_PAGESZ = 6,
471 SPARC_AT_CLKTCK = 17,
472 SPARC_AT_PHDR = 3,
473 SPARC_AT_PHENT = 4,
474 SPARC_AT_PHNUM = 5,
475 SPARC_AT_BASE = 7,
476 SPARC_AT_FLAGS = 8,
477 SPARC_AT_ENTRY = 9,
478 SPARC_AT_UID = 11,
479 SPARC_AT_EUID = 12,
480 SPARC_AT_GID = 13,
481 SPARC_AT_EGID = 14,
482 SPARC_AT_SECURE = 23
483 };
484
485 enum hardwareCaps
486 {
487 M5_HWCAP_SPARC_FLUSH = 1,
488 M5_HWCAP_SPARC_STBAR = 2,
489 M5_HWCAP_SPARC_SWAP = 4,
490 M5_HWCAP_SPARC_MULDIV = 8,
491 M5_HWCAP_SPARC_V9 = 16,
492 //This one should technically only be set
493 //if there is a cheetah or cheetah_plus tlb,
494 //but we'll use it all the time
495 M5_HWCAP_SPARC_ULTRA3 = 32
496 };
497
498 const int64_t hwcap =
499 M5_HWCAP_SPARC_FLUSH |
500 M5_HWCAP_SPARC_STBAR |
501 M5_HWCAP_SPARC_SWAP |
502 M5_HWCAP_SPARC_MULDIV |
503 M5_HWCAP_SPARC_V9 |
504 M5_HWCAP_SPARC_ULTRA3;
505
506
507 //Setup the auxilliary vectors. These will already have endian conversion.
508 //Auxilliary vectors are loaded only for elf formatted executables.
509 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile);
510 if(elfObject)
511 {
512 //Bits which describe the system hardware capabilities
513 auxv.push_back(auxv_t(SPARC_AT_HWCAP, hwcap));
514 //The system page size
515 auxv.push_back(auxv_t(SPARC_AT_PAGESZ, SparcISA::VMPageSize));
516 //Defined to be 100 in the kernel source.
517 //Frequency at which times() increments
518 auxv.push_back(auxv_t(SPARC_AT_CLKTCK, 100));
519 // For statically linked executables, this is the virtual address of the
520 // program header tables if they appear in the executable image
521 auxv.push_back(auxv_t(SPARC_AT_PHDR, elfObject->programHeaderTable()));
522 // This is the size of a program header entry from the elf file.
523 auxv.push_back(auxv_t(SPARC_AT_PHENT, elfObject->programHeaderSize()));
524 // This is the number of program headers from the original elf file.
525 auxv.push_back(auxv_t(SPARC_AT_PHNUM, elfObject->programHeaderCount()));
526 //This is the address of the elf "interpreter", It should be set
527 //to 0 for regular executables. It should be something else
528 //(not sure what) for dynamic libraries.
529 auxv.push_back(auxv_t(SPARC_AT_BASE, 0));
530 //This is hardwired to 0 in the elf loading code in the kernel
531 auxv.push_back(auxv_t(SPARC_AT_FLAGS, 0));
532 //The entry point to the program
533 auxv.push_back(auxv_t(SPARC_AT_ENTRY, objFile->entryPoint()));
534 //Different user and group IDs
535 auxv.push_back(auxv_t(SPARC_AT_UID, uid()));
536 auxv.push_back(auxv_t(SPARC_AT_EUID, euid()));
537 auxv.push_back(auxv_t(SPARC_AT_GID, gid()));
538 auxv.push_back(auxv_t(SPARC_AT_EGID, egid()));
539 //Whether to enable "secure mode" in the executable
540 auxv.push_back(auxv_t(SPARC_AT_SECURE, 0));
541 }
542
543 //Figure out how big the initial stack needs to be
544
545 // The unaccounted for 8 byte 0 at the top of the stack
546 int mysterious_size = 8;
547
548 //This is the name of the file which is present on the initial stack
549 //It's purpose is to let the user space linker examine the original file.
550 int file_name_size = filename.size() + 1;
551
552 int env_data_size = 0;
553 for (int i = 0; i < envp.size(); ++i) {
554 env_data_size += envp[i].size() + 1;
555 }
556 int arg_data_size = 0;
557 for (int i = 0; i < argv.size(); ++i) {
558 arg_data_size += argv[i].size() + 1;
559 }
560
561 //The info_block - This seems to need an pad for some reason.
562 int info_block_size =
563 (mysterious_size +
564 file_name_size +
565 env_data_size +
566 arg_data_size + intSize);
567
568 //Each auxilliary vector is two 4 byte words
569 int aux_array_size = intSize * 2 * (auxv.size() + 1);
570
571 int envp_array_size = intSize * (envp.size() + 1);
572 int argv_array_size = intSize * (argv.size() + 1);
573
574 int argc_size = intSize;
575 int window_save_size = intSize * 16;
576
577 int space_needed =
578 info_block_size +
579 aux_array_size +
580 envp_array_size +
581 argv_array_size +
582 argc_size +
583 window_save_size;
584
585 stack_min = stack_base - space_needed;
586 stack_min &= alignmentMask;
587 stack_size = stack_base - stack_min;
588
589 // map memory
590 pTable->allocate(roundDown(stack_min, pageSize),
591 roundUp(stack_size, pageSize));
592
593 // map out initial stack contents
594 uint32_t window_save_base = stack_min;
595 uint32_t argc_base = window_save_base + window_save_size;
596 uint32_t argv_array_base = argc_base + argc_size;
597 uint32_t envp_array_base = argv_array_base + argv_array_size;
598 uint32_t auxv_array_base = envp_array_base + envp_array_size;
599 //The info block is pushed up against the top of the stack, while
600 //the rest of the initial stack frame is aligned to an 8 byte boudary.
601 uint32_t arg_data_base = stack_base - info_block_size + intSize;
602 uint32_t env_data_base = arg_data_base + arg_data_size;
603 uint32_t file_name_base = env_data_base + env_data_size;
604 uint32_t mysterious_base = file_name_base + file_name_size;
605
606 DPRINTF(Sparc, "The addresses of items on the initial stack:\n");
607 DPRINTF(Sparc, "0x%x - file name\n", file_name_base);
608 DPRINTF(Sparc, "0x%x - env data\n", env_data_base);
609 DPRINTF(Sparc, "0x%x - arg data\n", arg_data_base);
610 DPRINTF(Sparc, "0x%x - auxv array\n", auxv_array_base);
611 DPRINTF(Sparc, "0x%x - envp array\n", envp_array_base);
612 DPRINTF(Sparc, "0x%x - argv array\n", argv_array_base);
613 DPRINTF(Sparc, "0x%x - argc \n", argc_base);
614 DPRINTF(Sparc, "0x%x - window save\n", window_save_base);
615 DPRINTF(Sparc, "0x%x - stack min\n", stack_min);
616
617 // write contents to stack
618
619 // figure out argc
620 uint32_t argc = argv.size();
621 uint32_t guestArgc = TheISA::htog(argc);
622
623 //Write out the mysterious 0
624 uint64_t mysterious_zero = 0;
625 initVirtMem->writeBlob(mysterious_base,
626 (uint8_t*)&mysterious_zero, mysterious_size);
627
628 //Write the file name
629 initVirtMem->writeString(file_name_base, filename.c_str());
630
631 //Copy the aux stuff
632 for(int x = 0; x < auxv.size(); x++)
633 {
634 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize,
635 (uint8_t*)&(auxv[x].a_type), intSize);
636 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize,
637 (uint8_t*)&(auxv[x].a_val), intSize);
638 }
639 //Write out the terminating zeroed auxilliary vector
640 const uint64_t zero = 0;
641 initVirtMem->writeBlob(auxv_array_base + 2 * intSize * auxv.size(),
642 (uint8_t*)&zero, 2 * intSize);
643
644 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
645 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
646
647 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize);
648
649 //Stuff the trap handlers into the processes address space.
650 //Since the stack grows down and is the highest area in the processes
651 //address space, we can put stuff above it and stay out of the way.
652 int fillSize = sizeof(MachInst) * numFillInsts;
653 int spillSize = sizeof(MachInst) * numSpillInsts;
654 fillStart = stack_base;
655 spillStart = fillStart + fillSize;
656 initVirtMem->writeBlob(fillStart, (uint8_t*)fillHandler32, fillSize);
657 initVirtMem->writeBlob(spillStart, (uint8_t*)spillHandler32, spillSize);
658
659 //Set up the thread context to start running the process
660 //assert(NumArgumentRegs >= 2);
661 //threadContexts[0]->setIntReg(ArgumentReg[0], argc);
662 //threadContexts[0]->setIntReg(ArgumentReg[1], argv_array_base);
663 threadContexts[0]->setIntReg(StackPointerReg, stack_min);
664
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