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, Addr _StackBias)
52 : LiveProcess(params, objFile), StackBias(_StackBias)
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
111SparcLiveProcess::startup()
112{
113 Process::startup();
114
115 ThreadContext *tc = system->getThreadContext(contextIds[0]);
116 //From the SPARC ABI
117
118 //Setup default FP state
119 tc->setMiscRegNoEffect(MISCREG_FSR, 0);
120
121 tc->setMiscRegNoEffect(MISCREG_TICK, 0);
122
123 /*
124 * Register window management registers
125 */
126
127 //No windows contain info from other programs
128 //tc->setMiscRegNoEffect(MISCREG_OTHERWIN, 0);
129 tc->setIntReg(NumIntArchRegs + 6, 0);
130 //There are no windows to pop
131 //tc->setMiscRegNoEffect(MISCREG_CANRESTORE, 0);
132 tc->setIntReg(NumIntArchRegs + 4, 0);
133 //All windows are available to save into
134 //tc->setMiscRegNoEffect(MISCREG_CANSAVE, NWindows - 2);
135 tc->setIntReg(NumIntArchRegs + 3, NWindows - 2);
136 //All windows are "clean"
137 //tc->setMiscRegNoEffect(MISCREG_CLEANWIN, NWindows);
138 tc->setIntReg(NumIntArchRegs + 5, NWindows);
139 //Start with register window 0
140 tc->setMiscRegNoEffect(MISCREG_CWP, 0);
141 //Always use spill and fill traps 0
142 //tc->setMiscRegNoEffect(MISCREG_WSTATE, 0);
143 tc->setIntReg(NumIntArchRegs + 7, 0);
144 //Set the trap level to 0
145 tc->setMiscRegNoEffect(MISCREG_TL, 0);
146 //Set the ASI register to something fixed
147 tc->setMiscRegNoEffect(MISCREG_ASI, ASI_PRIMARY);
148
149 /*
150 * T1 specific registers
151 */
152 //Turn on the icache, dcache, dtb translation, and itb translation.
153 tc->setMiscRegNoEffect(MISCREG_MMU_LSU_CTRL, 15);
154}
155
156void
157Sparc32LiveProcess::startup()
158{
159 if (checkpointRestored)
160 return;
161
162 SparcLiveProcess::startup();
163
164 ThreadContext *tc = system->getThreadContext(contextIds[0]);
165 //The process runs in user mode with 32 bit addresses
166 tc->setMiscReg(MISCREG_PSTATE, 0x0a);
167
168 argsInit(32 / 8, VMPageSize);
169}
170
171void
172Sparc64LiveProcess::startup()
173{
174 if (checkpointRestored)
175 return;
176
177 SparcLiveProcess::startup();
178
179 ThreadContext *tc = system->getThreadContext(contextIds[0]);
180 //The process runs in user mode
181 tc->setMiscReg(MISCREG_PSTATE, 0x02);
182
183 argsInit(sizeof(IntReg), VMPageSize);
184}
185
186template<class IntType>
187void
188SparcLiveProcess::argsInit(int pageSize)
189{
190 int intSize = sizeof(IntType);
191
| 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, Addr _StackBias)
52 : LiveProcess(params, objFile), StackBias(_StackBias)
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
111SparcLiveProcess::startup()
112{
113 Process::startup();
114
115 ThreadContext *tc = system->getThreadContext(contextIds[0]);
116 //From the SPARC ABI
117
118 //Setup default FP state
119 tc->setMiscRegNoEffect(MISCREG_FSR, 0);
120
121 tc->setMiscRegNoEffect(MISCREG_TICK, 0);
122
123 /*
124 * Register window management registers
125 */
126
127 //No windows contain info from other programs
128 //tc->setMiscRegNoEffect(MISCREG_OTHERWIN, 0);
129 tc->setIntReg(NumIntArchRegs + 6, 0);
130 //There are no windows to pop
131 //tc->setMiscRegNoEffect(MISCREG_CANRESTORE, 0);
132 tc->setIntReg(NumIntArchRegs + 4, 0);
133 //All windows are available to save into
134 //tc->setMiscRegNoEffect(MISCREG_CANSAVE, NWindows - 2);
135 tc->setIntReg(NumIntArchRegs + 3, NWindows - 2);
136 //All windows are "clean"
137 //tc->setMiscRegNoEffect(MISCREG_CLEANWIN, NWindows);
138 tc->setIntReg(NumIntArchRegs + 5, NWindows);
139 //Start with register window 0
140 tc->setMiscRegNoEffect(MISCREG_CWP, 0);
141 //Always use spill and fill traps 0
142 //tc->setMiscRegNoEffect(MISCREG_WSTATE, 0);
143 tc->setIntReg(NumIntArchRegs + 7, 0);
144 //Set the trap level to 0
145 tc->setMiscRegNoEffect(MISCREG_TL, 0);
146 //Set the ASI register to something fixed
147 tc->setMiscRegNoEffect(MISCREG_ASI, ASI_PRIMARY);
148
149 /*
150 * T1 specific registers
151 */
152 //Turn on the icache, dcache, dtb translation, and itb translation.
153 tc->setMiscRegNoEffect(MISCREG_MMU_LSU_CTRL, 15);
154}
155
156void
157Sparc32LiveProcess::startup()
158{
159 if (checkpointRestored)
160 return;
161
162 SparcLiveProcess::startup();
163
164 ThreadContext *tc = system->getThreadContext(contextIds[0]);
165 //The process runs in user mode with 32 bit addresses
166 tc->setMiscReg(MISCREG_PSTATE, 0x0a);
167
168 argsInit(32 / 8, VMPageSize);
169}
170
171void
172Sparc64LiveProcess::startup()
173{
174 if (checkpointRestored)
175 return;
176
177 SparcLiveProcess::startup();
178
179 ThreadContext *tc = system->getThreadContext(contextIds[0]);
180 //The process runs in user mode
181 tc->setMiscReg(MISCREG_PSTATE, 0x02);
182
183 argsInit(sizeof(IntReg), VMPageSize);
184}
185
186template<class IntType>
187void
188SparcLiveProcess::argsInit(int pageSize)
189{
190 int intSize = sizeof(IntType);
191
|
193
194 std::vector<auxv_t> auxv;
195
196 string filename;
197 if(argv.size() < 1)
198 filename = "";
199 else
200 filename = argv[0];
201
202 //Even for a 32 bit process, the ABI says we still need to
203 //maintain double word alignment of the stack pointer.
204 uint64_t align = 16;
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 //Setup the auxilliary vectors. These will already have endian conversion.
231 //Auxilliary vectors are loaded only for elf formatted executables.
232 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile);
233 if(elfObject)
234 {
235 //Bits which describe the system hardware capabilities
236 auxv.push_back(auxv_t(M5_AT_HWCAP, hwcap));
237 //The system page size
238 auxv.push_back(auxv_t(M5_AT_PAGESZ, SparcISA::VMPageSize));
239 //Defined to be 100 in the kernel source.
240 //Frequency at which times() increments
241 auxv.push_back(auxv_t(M5_AT_CLKTCK, 100));
242 // For statically linked executables, this is the virtual address of the
243 // program header tables if they appear in the executable image
244 auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable()));
245 // This is the size of a program header entry from the elf file.
246 auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize()));
247 // This is the number of program headers from the original elf file.
248 auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount()));
249 //This is the address of the elf "interpreter", It should be set
250 //to 0 for regular executables. It should be something else
251 //(not sure what) for dynamic libraries.
252 auxv.push_back(auxv_t(M5_AT_BASE, 0));
253 //This is hardwired to 0 in the elf loading code in the kernel
254 auxv.push_back(auxv_t(M5_AT_FLAGS, 0));
255 //The entry point to the program
256 auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint()));
257 //Different user and group IDs
258 auxv.push_back(auxv_t(M5_AT_UID, uid()));
259 auxv.push_back(auxv_t(M5_AT_EUID, euid()));
260 auxv.push_back(auxv_t(M5_AT_GID, gid()));
261 auxv.push_back(auxv_t(M5_AT_EGID, egid()));
262 //Whether to enable "secure mode" in the executable
263 auxv.push_back(auxv_t(M5_AT_SECURE, 0));
264 }
265
266 //Figure out how big the initial stack needs to be
267
268 // The unaccounted for 8 byte 0 at the top of the stack
269 int sentry_size = 8;
270
271 //This is the name of the file which is present on the initial stack
272 //It's purpose is to let the user space linker examine the original file.
273 int file_name_size = filename.size() + 1;
274
275 int env_data_size = 0;
276 for (int i = 0; i < envp.size(); ++i) {
277 env_data_size += envp[i].size() + 1;
278 }
279 int arg_data_size = 0;
280 for (int i = 0; i < argv.size(); ++i) {
281 arg_data_size += argv[i].size() + 1;
282 }
283
284 //The info_block.
285 int base_info_block_size =
286 sentry_size + file_name_size + env_data_size + arg_data_size;
287
288 int info_block_size = roundUp(base_info_block_size, align);
289
290 int info_block_padding = info_block_size - base_info_block_size;
291
292 //Each auxilliary vector is two words
293 int aux_array_size = intSize * 2 * (auxv.size() + 1);
294
295 int envp_array_size = intSize * (envp.size() + 1);
296 int argv_array_size = intSize * (argv.size() + 1);
297
298 int argc_size = intSize;
299 int window_save_size = intSize * 16;
300
301 //Figure out the size of the contents of the actual initial frame
302 int frame_size =
303 aux_array_size +
304 envp_array_size +
305 argv_array_size +
306 argc_size +
307 window_save_size;
308
309 //There needs to be padding after the auxiliary vector data so that the
310 //very bottom of the stack is aligned properly.
311 int aligned_partial_size = roundUp(frame_size, align);
312 int aux_padding = aligned_partial_size - frame_size;
313
314 int space_needed =
315 info_block_size +
316 aux_padding +
317 frame_size;
318
319 stack_min = stack_base - space_needed;
320 stack_min = roundDown(stack_min, align);
321 stack_size = stack_base - stack_min;
322
323 // Allocate space for the stack
324 pTable->allocate(roundDown(stack_min, pageSize),
325 roundUp(stack_size, pageSize));
326
327 // map out initial stack contents
328 IntType sentry_base = stack_base - sentry_size;
329 IntType file_name_base = sentry_base - file_name_size;
330 IntType env_data_base = file_name_base - env_data_size;
331 IntType arg_data_base = env_data_base - arg_data_size;
332 IntType auxv_array_base = arg_data_base -
333 info_block_padding - aux_array_size - aux_padding;
334 IntType envp_array_base = auxv_array_base - envp_array_size;
335 IntType argv_array_base = envp_array_base - argv_array_size;
336 IntType argc_base = argv_array_base - argc_size;
337#if TRACING_ON
338 IntType 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, "%#x - sentry NULL\n", sentry_base);
343 DPRINTF(Sparc, "filename = %s\n", filename);
344 DPRINTF(Sparc, "%#x - file name\n", file_name_base);
345 DPRINTF(Sparc, "%#x - env data\n", env_data_base);
346 DPRINTF(Sparc, "%#x - arg data\n", arg_data_base);
347 DPRINTF(Sparc, "%#x - auxv array\n", auxv_array_base);
348 DPRINTF(Sparc, "%#x - envp array\n", envp_array_base);
349 DPRINTF(Sparc, "%#x - argv array\n", argv_array_base);
350 DPRINTF(Sparc, "%#x - argc \n", argc_base);
351 DPRINTF(Sparc, "%#x - window save\n", window_save_base);
352 DPRINTF(Sparc, "%#x - stack min\n", stack_min);
353
354 assert(window_save_base == stack_min);
355
356 // write contents to stack
357
358 // figure out argc
359 IntType argc = argv.size();
360 IntType guestArgc = SparcISA::htog(argc);
361
362 //Write out the sentry void *
363 uint64_t sentry_NULL = 0;
364 initVirtMem->writeBlob(sentry_base,
365 (uint8_t*)&sentry_NULL, sentry_size);
366
367 //Write the file name
368 initVirtMem->writeString(file_name_base, filename.c_str());
369
370 //Copy the aux stuff
371 for(int x = 0; x < auxv.size(); x++)
372 {
373 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize,
374 (uint8_t*)&(auxv[x].a_type), intSize);
375 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize,
376 (uint8_t*)&(auxv[x].a_val), intSize);
377 }
378
379 //Write out the terminating zeroed auxilliary vector
380 const IntType zero = 0;
381 initVirtMem->writeBlob(auxv_array_base + intSize * 2 * auxv.size(),
382 (uint8_t*)&zero, intSize);
383 initVirtMem->writeBlob(auxv_array_base + intSize * (2 * auxv.size() + 1),
384 (uint8_t*)&zero, intSize);
385
386 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
387 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
388
389 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize);
390
391 //Set up space for the trap handlers into the processes address space.
392 //Since the stack grows down and there is reserved address space abov
393 //it, we can put stuff above it and stay out of the way.
394 fillStart = stack_base;
395 spillStart = fillStart + sizeof(MachInst) * numFillInsts;
396
397 ThreadContext *tc = system->getThreadContext(contextIds[0]);
398 //Set up the thread context to start running the process
399 //assert(NumArgumentRegs >= 2);
400 //tc->setIntReg(ArgumentReg[0], argc);
401 //tc->setIntReg(ArgumentReg[1], argv_array_base);
402 tc->setIntReg(StackPointerReg, stack_min - StackBias);
403
404 // %g1 is a pointer to a function that should be run at exit. Since we
405 // don't have anything like that, it should be set to 0.
406 tc->setIntReg(1, 0);
407
408 Addr prog_entry = objFile->entryPoint();
409 tc->setPC(prog_entry);
410 tc->setNextPC(prog_entry + sizeof(MachInst));
411 tc->setNextNPC(prog_entry + (2 * sizeof(MachInst)));
412
413 //Align the "stack_min" to a page boundary.
414 stack_min = roundDown(stack_min, pageSize);
415
416// num_processes++;
417}
418
419void
420Sparc64LiveProcess::argsInit(int intSize, int pageSize)
421{
422 SparcLiveProcess::argsInit<uint64_t>(pageSize);
423
424 // Stuff the trap handlers into the process address space
425 initVirtMem->writeBlob(fillStart,
426 (uint8_t*)fillHandler64, sizeof(MachInst) * numFillInsts);
427 initVirtMem->writeBlob(spillStart,
428 (uint8_t*)spillHandler64, sizeof(MachInst) * numSpillInsts);
429}
430
431void
432Sparc32LiveProcess::argsInit(int intSize, int pageSize)
433{
434 SparcLiveProcess::argsInit<uint32_t>(pageSize);
435
436 // Stuff the trap handlers into the process address space
437 initVirtMem->writeBlob(fillStart,
438 (uint8_t*)fillHandler32, sizeof(MachInst) * numFillInsts);
439 initVirtMem->writeBlob(spillStart,
440 (uint8_t*)spillHandler32, sizeof(MachInst) * numSpillInsts);
441}
442
443void Sparc32LiveProcess::flushWindows(ThreadContext *tc)
444{
445 IntReg Cansave = tc->readIntReg(NumIntArchRegs + 3);
446 IntReg Canrestore = tc->readIntReg(NumIntArchRegs + 4);
447 IntReg Otherwin = tc->readIntReg(NumIntArchRegs + 6);
448 MiscReg CWP = tc->readMiscReg(MISCREG_CWP);
449 MiscReg origCWP = CWP;
450 CWP = (CWP + Cansave + 2) % NWindows;
451 while(NWindows - 2 - Cansave != 0)
452 {
453 if (Otherwin) {
454 panic("Otherwin non-zero.\n");
455 } else {
456 tc->setMiscReg(MISCREG_CWP, CWP);
457 //Do the stores
458 IntReg sp = tc->readIntReg(StackPointerReg);
459 for (int index = 16; index < 32; index++) {
460 uint32_t regVal = tc->readIntReg(index);
461 regVal = htog(regVal);
462 if (!tc->getMemPort()->tryWriteBlob(
463 sp + (index - 16) * 4, (uint8_t *)®Val, 4)) {
464 warn("Failed to save register to the stack when "
465 "flushing windows.\n");
466 }
467 }
468 Canrestore--;
469 Cansave++;
470 CWP = (CWP + 1) % NWindows;
471 }
472 }
473 tc->setIntReg(NumIntArchRegs + 3, Cansave);
474 tc->setIntReg(NumIntArchRegs + 4, Canrestore);
475 tc->setMiscReg(MISCREG_CWP, origCWP);
476}
477
478void Sparc64LiveProcess::flushWindows(ThreadContext *tc)
479{
480 IntReg Cansave = tc->readIntReg(NumIntArchRegs + 3);
481 IntReg Canrestore = tc->readIntReg(NumIntArchRegs + 4);
482 IntReg Otherwin = tc->readIntReg(NumIntArchRegs + 6);
483 MiscReg CWP = tc->readMiscReg(MISCREG_CWP);
484 MiscReg origCWP = CWP;
485 CWP = (CWP + Cansave + 2) % NWindows;
486 while(NWindows - 2 - Cansave != 0)
487 {
488 if (Otherwin) {
489 panic("Otherwin non-zero.\n");
490 } else {
491 tc->setMiscReg(MISCREG_CWP, CWP);
492 //Do the stores
493 IntReg sp = tc->readIntReg(StackPointerReg);
494 for (int index = 16; index < 32; index++) {
495 IntReg regVal = tc->readIntReg(index);
496 regVal = htog(regVal);
497 if (!tc->getMemPort()->tryWriteBlob(
498 sp + 2047 + (index - 16) * 8, (uint8_t *)®Val, 8)) {
499 warn("Failed to save register to the stack when "
500 "flushing windows.\n");
501 }
502 }
503 Canrestore--;
504 Cansave++;
505 CWP = (CWP + 1) % NWindows;
506 }
507 }
508 tc->setIntReg(NumIntArchRegs + 3, Cansave);
509 tc->setIntReg(NumIntArchRegs + 4, Canrestore);
510 tc->setMiscReg(MISCREG_CWP, origCWP);
511}
| 193
194 std::vector<auxv_t> auxv;
195
196 string filename;
197 if(argv.size() < 1)
198 filename = "";
199 else
200 filename = argv[0];
201
202 //Even for a 32 bit process, the ABI says we still need to
203 //maintain double word alignment of the stack pointer.
204 uint64_t align = 16;
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 //Setup the auxilliary vectors. These will already have endian conversion.
231 //Auxilliary vectors are loaded only for elf formatted executables.
232 ElfObject * elfObject = dynamic_cast<ElfObject *>(objFile);
233 if(elfObject)
234 {
235 //Bits which describe the system hardware capabilities
236 auxv.push_back(auxv_t(M5_AT_HWCAP, hwcap));
237 //The system page size
238 auxv.push_back(auxv_t(M5_AT_PAGESZ, SparcISA::VMPageSize));
239 //Defined to be 100 in the kernel source.
240 //Frequency at which times() increments
241 auxv.push_back(auxv_t(M5_AT_CLKTCK, 100));
242 // For statically linked executables, this is the virtual address of the
243 // program header tables if they appear in the executable image
244 auxv.push_back(auxv_t(M5_AT_PHDR, elfObject->programHeaderTable()));
245 // This is the size of a program header entry from the elf file.
246 auxv.push_back(auxv_t(M5_AT_PHENT, elfObject->programHeaderSize()));
247 // This is the number of program headers from the original elf file.
248 auxv.push_back(auxv_t(M5_AT_PHNUM, elfObject->programHeaderCount()));
249 //This is the address of the elf "interpreter", It should be set
250 //to 0 for regular executables. It should be something else
251 //(not sure what) for dynamic libraries.
252 auxv.push_back(auxv_t(M5_AT_BASE, 0));
253 //This is hardwired to 0 in the elf loading code in the kernel
254 auxv.push_back(auxv_t(M5_AT_FLAGS, 0));
255 //The entry point to the program
256 auxv.push_back(auxv_t(M5_AT_ENTRY, objFile->entryPoint()));
257 //Different user and group IDs
258 auxv.push_back(auxv_t(M5_AT_UID, uid()));
259 auxv.push_back(auxv_t(M5_AT_EUID, euid()));
260 auxv.push_back(auxv_t(M5_AT_GID, gid()));
261 auxv.push_back(auxv_t(M5_AT_EGID, egid()));
262 //Whether to enable "secure mode" in the executable
263 auxv.push_back(auxv_t(M5_AT_SECURE, 0));
264 }
265
266 //Figure out how big the initial stack needs to be
267
268 // The unaccounted for 8 byte 0 at the top of the stack
269 int sentry_size = 8;
270
271 //This is the name of the file which is present on the initial stack
272 //It's purpose is to let the user space linker examine the original file.
273 int file_name_size = filename.size() + 1;
274
275 int env_data_size = 0;
276 for (int i = 0; i < envp.size(); ++i) {
277 env_data_size += envp[i].size() + 1;
278 }
279 int arg_data_size = 0;
280 for (int i = 0; i < argv.size(); ++i) {
281 arg_data_size += argv[i].size() + 1;
282 }
283
284 //The info_block.
285 int base_info_block_size =
286 sentry_size + file_name_size + env_data_size + arg_data_size;
287
288 int info_block_size = roundUp(base_info_block_size, align);
289
290 int info_block_padding = info_block_size - base_info_block_size;
291
292 //Each auxilliary vector is two words
293 int aux_array_size = intSize * 2 * (auxv.size() + 1);
294
295 int envp_array_size = intSize * (envp.size() + 1);
296 int argv_array_size = intSize * (argv.size() + 1);
297
298 int argc_size = intSize;
299 int window_save_size = intSize * 16;
300
301 //Figure out the size of the contents of the actual initial frame
302 int frame_size =
303 aux_array_size +
304 envp_array_size +
305 argv_array_size +
306 argc_size +
307 window_save_size;
308
309 //There needs to be padding after the auxiliary vector data so that the
310 //very bottom of the stack is aligned properly.
311 int aligned_partial_size = roundUp(frame_size, align);
312 int aux_padding = aligned_partial_size - frame_size;
313
314 int space_needed =
315 info_block_size +
316 aux_padding +
317 frame_size;
318
319 stack_min = stack_base - space_needed;
320 stack_min = roundDown(stack_min, align);
321 stack_size = stack_base - stack_min;
322
323 // Allocate space for the stack
324 pTable->allocate(roundDown(stack_min, pageSize),
325 roundUp(stack_size, pageSize));
326
327 // map out initial stack contents
328 IntType sentry_base = stack_base - sentry_size;
329 IntType file_name_base = sentry_base - file_name_size;
330 IntType env_data_base = file_name_base - env_data_size;
331 IntType arg_data_base = env_data_base - arg_data_size;
332 IntType auxv_array_base = arg_data_base -
333 info_block_padding - aux_array_size - aux_padding;
334 IntType envp_array_base = auxv_array_base - envp_array_size;
335 IntType argv_array_base = envp_array_base - argv_array_size;
336 IntType argc_base = argv_array_base - argc_size;
337#if TRACING_ON
338 IntType 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, "%#x - sentry NULL\n", sentry_base);
343 DPRINTF(Sparc, "filename = %s\n", filename);
344 DPRINTF(Sparc, "%#x - file name\n", file_name_base);
345 DPRINTF(Sparc, "%#x - env data\n", env_data_base);
346 DPRINTF(Sparc, "%#x - arg data\n", arg_data_base);
347 DPRINTF(Sparc, "%#x - auxv array\n", auxv_array_base);
348 DPRINTF(Sparc, "%#x - envp array\n", envp_array_base);
349 DPRINTF(Sparc, "%#x - argv array\n", argv_array_base);
350 DPRINTF(Sparc, "%#x - argc \n", argc_base);
351 DPRINTF(Sparc, "%#x - window save\n", window_save_base);
352 DPRINTF(Sparc, "%#x - stack min\n", stack_min);
353
354 assert(window_save_base == stack_min);
355
356 // write contents to stack
357
358 // figure out argc
359 IntType argc = argv.size();
360 IntType guestArgc = SparcISA::htog(argc);
361
362 //Write out the sentry void *
363 uint64_t sentry_NULL = 0;
364 initVirtMem->writeBlob(sentry_base,
365 (uint8_t*)&sentry_NULL, sentry_size);
366
367 //Write the file name
368 initVirtMem->writeString(file_name_base, filename.c_str());
369
370 //Copy the aux stuff
371 for(int x = 0; x < auxv.size(); x++)
372 {
373 initVirtMem->writeBlob(auxv_array_base + x * 2 * intSize,
374 (uint8_t*)&(auxv[x].a_type), intSize);
375 initVirtMem->writeBlob(auxv_array_base + (x * 2 + 1) * intSize,
376 (uint8_t*)&(auxv[x].a_val), intSize);
377 }
378
379 //Write out the terminating zeroed auxilliary vector
380 const IntType zero = 0;
381 initVirtMem->writeBlob(auxv_array_base + intSize * 2 * auxv.size(),
382 (uint8_t*)&zero, intSize);
383 initVirtMem->writeBlob(auxv_array_base + intSize * (2 * auxv.size() + 1),
384 (uint8_t*)&zero, intSize);
385
386 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem);
387 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem);
388
389 initVirtMem->writeBlob(argc_base, (uint8_t*)&guestArgc, intSize);
390
391 //Set up space for the trap handlers into the processes address space.
392 //Since the stack grows down and there is reserved address space abov
393 //it, we can put stuff above it and stay out of the way.
394 fillStart = stack_base;
395 spillStart = fillStart + sizeof(MachInst) * numFillInsts;
396
397 ThreadContext *tc = system->getThreadContext(contextIds[0]);
398 //Set up the thread context to start running the process
399 //assert(NumArgumentRegs >= 2);
400 //tc->setIntReg(ArgumentReg[0], argc);
401 //tc->setIntReg(ArgumentReg[1], argv_array_base);
402 tc->setIntReg(StackPointerReg, stack_min - StackBias);
403
404 // %g1 is a pointer to a function that should be run at exit. Since we
405 // don't have anything like that, it should be set to 0.
406 tc->setIntReg(1, 0);
407
408 Addr prog_entry = objFile->entryPoint();
409 tc->setPC(prog_entry);
410 tc->setNextPC(prog_entry + sizeof(MachInst));
411 tc->setNextNPC(prog_entry + (2 * sizeof(MachInst)));
412
413 //Align the "stack_min" to a page boundary.
414 stack_min = roundDown(stack_min, pageSize);
415
416// num_processes++;
417}
418
419void
420Sparc64LiveProcess::argsInit(int intSize, int pageSize)
421{
422 SparcLiveProcess::argsInit<uint64_t>(pageSize);
423
424 // Stuff the trap handlers into the process address space
425 initVirtMem->writeBlob(fillStart,
426 (uint8_t*)fillHandler64, sizeof(MachInst) * numFillInsts);
427 initVirtMem->writeBlob(spillStart,
428 (uint8_t*)spillHandler64, sizeof(MachInst) * numSpillInsts);
429}
430
431void
432Sparc32LiveProcess::argsInit(int intSize, int pageSize)
433{
434 SparcLiveProcess::argsInit<uint32_t>(pageSize);
435
436 // Stuff the trap handlers into the process address space
437 initVirtMem->writeBlob(fillStart,
438 (uint8_t*)fillHandler32, sizeof(MachInst) * numFillInsts);
439 initVirtMem->writeBlob(spillStart,
440 (uint8_t*)spillHandler32, sizeof(MachInst) * numSpillInsts);
441}
442
443void Sparc32LiveProcess::flushWindows(ThreadContext *tc)
444{
445 IntReg Cansave = tc->readIntReg(NumIntArchRegs + 3);
446 IntReg Canrestore = tc->readIntReg(NumIntArchRegs + 4);
447 IntReg Otherwin = tc->readIntReg(NumIntArchRegs + 6);
448 MiscReg CWP = tc->readMiscReg(MISCREG_CWP);
449 MiscReg origCWP = CWP;
450 CWP = (CWP + Cansave + 2) % NWindows;
451 while(NWindows - 2 - Cansave != 0)
452 {
453 if (Otherwin) {
454 panic("Otherwin non-zero.\n");
455 } else {
456 tc->setMiscReg(MISCREG_CWP, CWP);
457 //Do the stores
458 IntReg sp = tc->readIntReg(StackPointerReg);
459 for (int index = 16; index < 32; index++) {
460 uint32_t regVal = tc->readIntReg(index);
461 regVal = htog(regVal);
462 if (!tc->getMemPort()->tryWriteBlob(
463 sp + (index - 16) * 4, (uint8_t *)®Val, 4)) {
464 warn("Failed to save register to the stack when "
465 "flushing windows.\n");
466 }
467 }
468 Canrestore--;
469 Cansave++;
470 CWP = (CWP + 1) % NWindows;
471 }
472 }
473 tc->setIntReg(NumIntArchRegs + 3, Cansave);
474 tc->setIntReg(NumIntArchRegs + 4, Canrestore);
475 tc->setMiscReg(MISCREG_CWP, origCWP);
476}
477
478void Sparc64LiveProcess::flushWindows(ThreadContext *tc)
479{
480 IntReg Cansave = tc->readIntReg(NumIntArchRegs + 3);
481 IntReg Canrestore = tc->readIntReg(NumIntArchRegs + 4);
482 IntReg Otherwin = tc->readIntReg(NumIntArchRegs + 6);
483 MiscReg CWP = tc->readMiscReg(MISCREG_CWP);
484 MiscReg origCWP = CWP;
485 CWP = (CWP + Cansave + 2) % NWindows;
486 while(NWindows - 2 - Cansave != 0)
487 {
488 if (Otherwin) {
489 panic("Otherwin non-zero.\n");
490 } else {
491 tc->setMiscReg(MISCREG_CWP, CWP);
492 //Do the stores
493 IntReg sp = tc->readIntReg(StackPointerReg);
494 for (int index = 16; index < 32; index++) {
495 IntReg regVal = tc->readIntReg(index);
496 regVal = htog(regVal);
497 if (!tc->getMemPort()->tryWriteBlob(
498 sp + 2047 + (index - 16) * 8, (uint8_t *)®Val, 8)) {
499 warn("Failed to save register to the stack when "
500 "flushing windows.\n");
501 }
502 }
503 Canrestore--;
504 Cansave++;
505 CWP = (CWP + 1) % NWindows;
506 }
507 }
508 tc->setIntReg(NumIntArchRegs + 3, Cansave);
509 tc->setIntReg(NumIntArchRegs + 4, Canrestore);
510 tc->setMiscReg(MISCREG_CWP, origCWP);
511}
|