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1 | /* | |
2 | * i386 emulator main execution loop | |
3 | * | |
4 | * Copyright (c) 2003-2005 Fabrice Bellard | |
5 | * | |
6 | * This library is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * This library is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | #include "config.h" | |
20 | #include "exec.h" | |
21 | #include "disas.h" | |
22 | #include "tcg.h" | |
23 | #include "kvm.h" | |
24 | ||
25 | #if !defined(CONFIG_SOFTMMU) | |
26 | #undef EAX | |
27 | #undef ECX | |
28 | #undef EDX | |
29 | #undef EBX | |
30 | #undef ESP | |
31 | #undef EBP | |
32 | #undef ESI | |
33 | #undef EDI | |
34 | #undef EIP | |
35 | #include <signal.h> | |
36 | #ifdef __linux__ | |
37 | #include <sys/ucontext.h> | |
38 | #endif | |
39 | #endif | |
40 | ||
41 | #if defined(__sparc__) && !defined(CONFIG_SOLARIS) | |
42 | // Work around ugly bugs in glibc that mangle global register contents | |
43 | #undef env | |
44 | #define env cpu_single_env | |
45 | #endif | |
46 | ||
47 | int tb_invalidated_flag; | |
48 | ||
49 | //#define CONFIG_DEBUG_EXEC | |
50 | //#define DEBUG_SIGNAL | |
51 | ||
52 | int qemu_cpu_has_work(CPUState *env) | |
53 | { | |
54 | return cpu_has_work(env); | |
55 | } | |
56 | ||
57 | void cpu_loop_exit(void) | |
58 | { | |
59 | /* NOTE: the register at this point must be saved by hand because | |
60 | longjmp restore them */ | |
61 | regs_to_env(); | |
62 | longjmp(env->jmp_env, 1); | |
63 | } | |
64 | ||
65 | /* exit the current TB from a signal handler. The host registers are | |
66 | restored in a state compatible with the CPU emulator | |
67 | */ | |
68 | void cpu_resume_from_signal(CPUState *env1, void *puc) | |
69 | { | |
70 | #if !defined(CONFIG_SOFTMMU) | |
71 | #ifdef __linux__ | |
72 | struct ucontext *uc = puc; | |
73 | #elif defined(__OpenBSD__) | |
74 | struct sigcontext *uc = puc; | |
75 | #endif | |
76 | #endif | |
77 | ||
78 | env = env1; | |
79 | ||
80 | /* XXX: restore cpu registers saved in host registers */ | |
81 | ||
82 | #if !defined(CONFIG_SOFTMMU) | |
83 | if (puc) { | |
84 | /* XXX: use siglongjmp ? */ | |
85 | #ifdef __linux__ | |
86 | sigprocmask(SIG_SETMASK, &uc->uc_sigmask, NULL); | |
87 | #elif defined(__OpenBSD__) | |
88 | sigprocmask(SIG_SETMASK, &uc->sc_mask, NULL); | |
89 | #endif | |
90 | } | |
91 | #endif | |
92 | env->exception_index = -1; | |
93 | longjmp(env->jmp_env, 1); | |
94 | } | |
95 | ||
96 | /* Execute the code without caching the generated code. An interpreter | |
97 | could be used if available. */ | |
98 | static void cpu_exec_nocache(int max_cycles, TranslationBlock *orig_tb) | |
99 | { | |
100 | unsigned long next_tb; | |
101 | TranslationBlock *tb; | |
102 | ||
103 | /* Should never happen. | |
104 | We only end up here when an existing TB is too long. */ | |
105 | if (max_cycles > CF_COUNT_MASK) | |
106 | max_cycles = CF_COUNT_MASK; | |
107 | ||
108 | tb = tb_gen_code(env, orig_tb->pc, orig_tb->cs_base, orig_tb->flags, | |
109 | max_cycles); | |
110 | env->current_tb = tb; | |
111 | /* execute the generated code */ | |
112 | next_tb = tcg_qemu_tb_exec(tb->tc_ptr); | |
113 | ||
114 | if ((next_tb & 3) == 2) { | |
115 | /* Restore PC. This may happen if async event occurs before | |
116 | the TB starts executing. */ | |
117 | cpu_pc_from_tb(env, tb); | |
118 | } | |
119 | tb_phys_invalidate(tb, -1); | |
120 | tb_free(tb); | |
121 | } | |
122 | ||
123 | static TranslationBlock *tb_find_slow(target_ulong pc, | |
124 | target_ulong cs_base, | |
125 | uint64_t flags) | |
126 | { | |
127 | TranslationBlock *tb, **ptb1; | |
128 | unsigned int h; | |
129 | target_ulong phys_pc, phys_page1, phys_page2, virt_page2; | |
130 | ||
131 | tb_invalidated_flag = 0; | |
132 | ||
133 | regs_to_env(); /* XXX: do it just before cpu_gen_code() */ | |
134 | ||
135 | /* find translated block using physical mappings */ | |
136 | phys_pc = get_phys_addr_code(env, pc); | |
137 | phys_page1 = phys_pc & TARGET_PAGE_MASK; | |
138 | phys_page2 = -1; | |
139 | h = tb_phys_hash_func(phys_pc); | |
140 | ptb1 = &tb_phys_hash[h]; | |
141 | for(;;) { | |
142 | tb = *ptb1; | |
143 | if (!tb) | |
144 | goto not_found; | |
145 | if (tb->pc == pc && | |
146 | tb->page_addr[0] == phys_page1 && | |
147 | tb->cs_base == cs_base && | |
148 | tb->flags == flags) { | |
149 | /* check next page if needed */ | |
150 | if (tb->page_addr[1] != -1) { | |
151 | virt_page2 = (pc & TARGET_PAGE_MASK) + | |
152 | TARGET_PAGE_SIZE; | |
153 | phys_page2 = get_phys_addr_code(env, virt_page2); | |
154 | if (tb->page_addr[1] == phys_page2) | |
155 | goto found; | |
156 | } else { | |
157 | goto found; | |
158 | } | |
159 | } | |
160 | ptb1 = &tb->phys_hash_next; | |
161 | } | |
162 | not_found: | |
163 | /* if no translated code available, then translate it now */ | |
164 | tb = tb_gen_code(env, pc, cs_base, flags, 0); | |
165 | ||
166 | found: | |
167 | /* we add the TB in the virtual pc hash table */ | |
168 | env->tb_jmp_cache[tb_jmp_cache_hash_func(pc)] = tb; | |
169 | return tb; | |
170 | } | |
171 | ||
172 | static inline TranslationBlock *tb_find_fast(void) | |
173 | { | |
174 | TranslationBlock *tb; | |
175 | target_ulong cs_base, pc; | |
176 | int flags; | |
177 | ||
178 | /* we record a subset of the CPU state. It will | |
179 | always be the same before a given translated block | |
180 | is executed. */ | |
181 | cpu_get_tb_cpu_state(env, &pc, &cs_base, &flags); | |
182 | tb = env->tb_jmp_cache[tb_jmp_cache_hash_func(pc)]; | |
183 | if (unlikely(!tb || tb->pc != pc || tb->cs_base != cs_base || | |
184 | tb->flags != flags)) { | |
185 | tb = tb_find_slow(pc, cs_base, flags); | |
186 | } | |
187 | return tb; | |
188 | } | |
189 | ||
190 | static CPUDebugExcpHandler *debug_excp_handler; | |
191 | ||
192 | CPUDebugExcpHandler *cpu_set_debug_excp_handler(CPUDebugExcpHandler *handler) | |
193 | { | |
194 | CPUDebugExcpHandler *old_handler = debug_excp_handler; | |
195 | ||
196 | debug_excp_handler = handler; | |
197 | return old_handler; | |
198 | } | |
199 | ||
200 | static void cpu_handle_debug_exception(CPUState *env) | |
201 | { | |
202 | CPUWatchpoint *wp; | |
203 | ||
204 | if (!env->watchpoint_hit) | |
205 | QTAILQ_FOREACH(wp, &env->watchpoints, entry) | |
206 | wp->flags &= ~BP_WATCHPOINT_HIT; | |
207 | ||
208 | if (debug_excp_handler) | |
209 | debug_excp_handler(env); | |
210 | } | |
211 | ||
212 | /* main execution loop */ | |
213 | ||
214 | int cpu_exec(CPUState *env1) | |
215 | { | |
216 | #define DECLARE_HOST_REGS 1 | |
217 | #include "hostregs_helper.h" | |
218 | int ret, interrupt_request; | |
219 | TranslationBlock *tb; | |
220 | uint8_t *tc_ptr; | |
221 | unsigned long next_tb; | |
222 | ||
223 | if (cpu_halted(env1) == EXCP_HALTED) | |
224 | return EXCP_HALTED; | |
225 | ||
226 | cpu_single_env = env1; | |
227 | ||
228 | /* first we save global registers */ | |
229 | #define SAVE_HOST_REGS 1 | |
230 | #include "hostregs_helper.h" | |
231 | env = env1; | |
232 | ||
233 | env_to_regs(); | |
234 | #if defined(TARGET_I386) | |
235 | /* put eflags in CPU temporary format */ | |
236 | CC_SRC = env->eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); | |
237 | DF = 1 - (2 * ((env->eflags >> 10) & 1)); | |
238 | CC_OP = CC_OP_EFLAGS; | |
239 | env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); | |
240 | #elif defined(TARGET_SPARC) | |
241 | #elif defined(TARGET_M68K) | |
242 | env->cc_op = CC_OP_FLAGS; | |
243 | env->cc_dest = env->sr & 0xf; | |
244 | env->cc_x = (env->sr >> 4) & 1; | |
245 | #elif defined(TARGET_ALPHA) | |
246 | #elif defined(TARGET_ARM) | |
247 | #elif defined(TARGET_PPC) | |
248 | #elif defined(TARGET_MICROBLAZE) | |
249 | #elif defined(TARGET_MIPS) | |
250 | #elif defined(TARGET_SH4) | |
251 | #elif defined(TARGET_CRIS) | |
252 | #elif defined(TARGET_S390X) | |
253 | /* XXXXX */ | |
254 | #else | |
255 | #error unsupported target CPU | |
256 | #endif | |
257 | env->exception_index = -1; | |
258 | ||
259 | /* prepare setjmp context for exception handling */ | |
260 | for(;;) { | |
261 | if (setjmp(env->jmp_env) == 0) { | |
262 | #if defined(__sparc__) && !defined(CONFIG_SOLARIS) | |
263 | #undef env | |
264 | env = cpu_single_env; | |
265 | #define env cpu_single_env | |
266 | #endif | |
267 | env->current_tb = NULL; | |
268 | /* if an exception is pending, we execute it here */ | |
269 | if (env->exception_index >= 0) { | |
270 | if (env->exception_index >= EXCP_INTERRUPT) { | |
271 | /* exit request from the cpu execution loop */ | |
272 | ret = env->exception_index; | |
273 | if (ret == EXCP_DEBUG) | |
274 | cpu_handle_debug_exception(env); | |
275 | break; | |
276 | } else { | |
277 | #if defined(CONFIG_USER_ONLY) | |
278 | /* if user mode only, we simulate a fake exception | |
279 | which will be handled outside the cpu execution | |
280 | loop */ | |
281 | #if defined(TARGET_I386) | |
282 | do_interrupt_user(env->exception_index, | |
283 | env->exception_is_int, | |
284 | env->error_code, | |
285 | env->exception_next_eip); | |
286 | /* successfully delivered */ | |
287 | env->old_exception = -1; | |
288 | #endif | |
289 | ret = env->exception_index; | |
290 | break; | |
291 | #else | |
292 | #if defined(TARGET_I386) | |
293 | /* simulate a real cpu exception. On i386, it can | |
294 | trigger new exceptions, but we do not handle | |
295 | double or triple faults yet. */ | |
296 | do_interrupt(env->exception_index, | |
297 | env->exception_is_int, | |
298 | env->error_code, | |
299 | env->exception_next_eip, 0); | |
300 | /* successfully delivered */ | |
301 | env->old_exception = -1; | |
302 | #elif defined(TARGET_PPC) | |
303 | do_interrupt(env); | |
304 | #elif defined(TARGET_MICROBLAZE) | |
305 | do_interrupt(env); | |
306 | #elif defined(TARGET_MIPS) | |
307 | do_interrupt(env); | |
308 | #elif defined(TARGET_SPARC) | |
309 | do_interrupt(env); | |
310 | #elif defined(TARGET_ARM) | |
311 | do_interrupt(env); | |
312 | #elif defined(TARGET_SH4) | |
313 | do_interrupt(env); | |
314 | #elif defined(TARGET_ALPHA) | |
315 | do_interrupt(env); | |
316 | #elif defined(TARGET_CRIS) | |
317 | do_interrupt(env); | |
318 | #elif defined(TARGET_M68K) | |
319 | do_interrupt(0); | |
320 | #endif | |
321 | #endif | |
322 | } | |
323 | env->exception_index = -1; | |
324 | } | |
325 | ||
326 | if (kvm_enabled()) { | |
327 | kvm_cpu_exec(env); | |
328 | longjmp(env->jmp_env, 1); | |
329 | } | |
330 | ||
331 | next_tb = 0; /* force lookup of first TB */ | |
332 | for(;;) { | |
333 | interrupt_request = env->interrupt_request; | |
334 | if (unlikely(interrupt_request)) { | |
335 | if (unlikely(env->singlestep_enabled & SSTEP_NOIRQ)) { | |
336 | /* Mask out external interrupts for this step. */ | |
337 | interrupt_request &= ~(CPU_INTERRUPT_HARD | | |
338 | CPU_INTERRUPT_FIQ | | |
339 | CPU_INTERRUPT_SMI | | |
340 | CPU_INTERRUPT_NMI); | |
341 | } | |
342 | if (interrupt_request & CPU_INTERRUPT_DEBUG) { | |
343 | env->interrupt_request &= ~CPU_INTERRUPT_DEBUG; | |
344 | env->exception_index = EXCP_DEBUG; | |
345 | cpu_loop_exit(); | |
346 | } | |
347 | #if defined(TARGET_ARM) || defined(TARGET_SPARC) || defined(TARGET_MIPS) || \ | |
348 | defined(TARGET_PPC) || defined(TARGET_ALPHA) || defined(TARGET_CRIS) || \ | |
349 | defined(TARGET_MICROBLAZE) | |
350 | if (interrupt_request & CPU_INTERRUPT_HALT) { | |
351 | env->interrupt_request &= ~CPU_INTERRUPT_HALT; | |
352 | env->halted = 1; | |
353 | env->exception_index = EXCP_HLT; | |
354 | cpu_loop_exit(); | |
355 | } | |
356 | #endif | |
357 | #if defined(TARGET_I386) | |
358 | if (interrupt_request & CPU_INTERRUPT_INIT) { | |
359 | svm_check_intercept(SVM_EXIT_INIT); | |
360 | do_cpu_init(env); | |
361 | env->exception_index = EXCP_HALTED; | |
362 | cpu_loop_exit(); | |
363 | } else if (interrupt_request & CPU_INTERRUPT_SIPI) { | |
364 | do_cpu_sipi(env); | |
365 | } else if (env->hflags2 & HF2_GIF_MASK) { | |
366 | if ((interrupt_request & CPU_INTERRUPT_SMI) && | |
367 | !(env->hflags & HF_SMM_MASK)) { | |
368 | svm_check_intercept(SVM_EXIT_SMI); | |
369 | env->interrupt_request &= ~CPU_INTERRUPT_SMI; | |
370 | do_smm_enter(); | |
371 | next_tb = 0; | |
372 | } else if ((interrupt_request & CPU_INTERRUPT_NMI) && | |
373 | !(env->hflags2 & HF2_NMI_MASK)) { | |
374 | env->interrupt_request &= ~CPU_INTERRUPT_NMI; | |
375 | env->hflags2 |= HF2_NMI_MASK; | |
376 | do_interrupt(EXCP02_NMI, 0, 0, 0, 1); | |
377 | next_tb = 0; | |
378 | } else if (interrupt_request & CPU_INTERRUPT_MCE) { | |
379 | env->interrupt_request &= ~CPU_INTERRUPT_MCE; | |
380 | do_interrupt(EXCP12_MCHK, 0, 0, 0, 0); | |
381 | next_tb = 0; | |
382 | } else if ((interrupt_request & CPU_INTERRUPT_HARD) && | |
383 | (((env->hflags2 & HF2_VINTR_MASK) && | |
384 | (env->hflags2 & HF2_HIF_MASK)) || | |
385 | (!(env->hflags2 & HF2_VINTR_MASK) && | |
386 | (env->eflags & IF_MASK && | |
387 | !(env->hflags & HF_INHIBIT_IRQ_MASK))))) { | |
388 | int intno; | |
389 | svm_check_intercept(SVM_EXIT_INTR); | |
390 | env->interrupt_request &= ~(CPU_INTERRUPT_HARD | CPU_INTERRUPT_VIRQ); | |
391 | intno = cpu_get_pic_interrupt(env); | |
392 | qemu_log_mask(CPU_LOG_TB_IN_ASM, "Servicing hardware INT=0x%02x\n", intno); | |
393 | #if defined(__sparc__) && !defined(CONFIG_SOLARIS) | |
394 | #undef env | |
395 | env = cpu_single_env; | |
396 | #define env cpu_single_env | |
397 | #endif | |
398 | do_interrupt(intno, 0, 0, 0, 1); | |
399 | /* ensure that no TB jump will be modified as | |
400 | the program flow was changed */ | |
401 | next_tb = 0; | |
402 | #if !defined(CONFIG_USER_ONLY) | |
403 | } else if ((interrupt_request & CPU_INTERRUPT_VIRQ) && | |
404 | (env->eflags & IF_MASK) && | |
405 | !(env->hflags & HF_INHIBIT_IRQ_MASK)) { | |
406 | int intno; | |
407 | /* FIXME: this should respect TPR */ | |
408 | svm_check_intercept(SVM_EXIT_VINTR); | |
409 | intno = ldl_phys(env->vm_vmcb + offsetof(struct vmcb, control.int_vector)); | |
410 | qemu_log_mask(CPU_LOG_TB_IN_ASM, "Servicing virtual hardware INT=0x%02x\n", intno); | |
411 | do_interrupt(intno, 0, 0, 0, 1); | |
412 | env->interrupt_request &= ~CPU_INTERRUPT_VIRQ; | |
413 | next_tb = 0; | |
414 | #endif | |
415 | } | |
416 | } | |
417 | #elif defined(TARGET_PPC) | |
418 | #if 0 | |
419 | if ((interrupt_request & CPU_INTERRUPT_RESET)) { | |
420 | cpu_reset(env); | |
421 | } | |
422 | #endif | |
423 | if (interrupt_request & CPU_INTERRUPT_HARD) { | |
424 | ppc_hw_interrupt(env); | |
425 | if (env->pending_interrupts == 0) | |
426 | env->interrupt_request &= ~CPU_INTERRUPT_HARD; | |
427 | next_tb = 0; | |
428 | } | |
429 | #elif defined(TARGET_MICROBLAZE) | |
430 | if ((interrupt_request & CPU_INTERRUPT_HARD) | |
431 | && (env->sregs[SR_MSR] & MSR_IE) | |
432 | && !(env->sregs[SR_MSR] & (MSR_EIP | MSR_BIP)) | |
433 | && !(env->iflags & (D_FLAG | IMM_FLAG))) { | |
434 | env->exception_index = EXCP_IRQ; | |
435 | do_interrupt(env); | |
436 | next_tb = 0; | |
437 | } | |
438 | #elif defined(TARGET_MIPS) | |
439 | if ((interrupt_request & CPU_INTERRUPT_HARD) && | |
440 | (env->CP0_Status & env->CP0_Cause & CP0Ca_IP_mask) && | |
441 | (env->CP0_Status & (1 << CP0St_IE)) && | |
442 | !(env->CP0_Status & (1 << CP0St_EXL)) && | |
443 | !(env->CP0_Status & (1 << CP0St_ERL)) && | |
444 | !(env->hflags & MIPS_HFLAG_DM)) { | |
445 | /* Raise it */ | |
446 | env->exception_index = EXCP_EXT_INTERRUPT; | |
447 | env->error_code = 0; | |
448 | do_interrupt(env); | |
449 | next_tb = 0; | |
450 | } | |
451 | #elif defined(TARGET_SPARC) | |
452 | if ((interrupt_request & CPU_INTERRUPT_HARD) && | |
453 | cpu_interrupts_enabled(env)) { | |
454 | int pil = env->interrupt_index & 15; | |
455 | int type = env->interrupt_index & 0xf0; | |
456 | ||
457 | if (((type == TT_EXTINT) && | |
458 | (pil == 15 || pil > env->psrpil)) || | |
459 | type != TT_EXTINT) { | |
460 | env->interrupt_request &= ~CPU_INTERRUPT_HARD; | |
461 | env->exception_index = env->interrupt_index; | |
462 | do_interrupt(env); | |
463 | env->interrupt_index = 0; | |
464 | next_tb = 0; | |
465 | } | |
466 | } else if (interrupt_request & CPU_INTERRUPT_TIMER) { | |
467 | //do_interrupt(0, 0, 0, 0, 0); | |
468 | env->interrupt_request &= ~CPU_INTERRUPT_TIMER; | |
469 | } | |
470 | #elif defined(TARGET_ARM) | |
471 | if (interrupt_request & CPU_INTERRUPT_FIQ | |
472 | && !(env->uncached_cpsr & CPSR_F)) { | |
473 | env->exception_index = EXCP_FIQ; | |
474 | do_interrupt(env); | |
475 | next_tb = 0; | |
476 | } | |
477 | /* ARMv7-M interrupt return works by loading a magic value | |
478 | into the PC. On real hardware the load causes the | |
479 | return to occur. The qemu implementation performs the | |
480 | jump normally, then does the exception return when the | |
481 | CPU tries to execute code at the magic address. | |
482 | This will cause the magic PC value to be pushed to | |
483 | the stack if an interrupt occured at the wrong time. | |
484 | We avoid this by disabling interrupts when | |
485 | pc contains a magic address. */ | |
486 | if (interrupt_request & CPU_INTERRUPT_HARD | |
487 | && ((IS_M(env) && env->regs[15] < 0xfffffff0) | |
488 | || !(env->uncached_cpsr & CPSR_I))) { | |
489 | env->exception_index = EXCP_IRQ; | |
490 | do_interrupt(env); | |
491 | next_tb = 0; | |
492 | } | |
493 | #elif defined(TARGET_SH4) | |
494 | if (interrupt_request & CPU_INTERRUPT_HARD) { | |
495 | do_interrupt(env); | |
496 | next_tb = 0; | |
497 | } | |
498 | #elif defined(TARGET_ALPHA) | |
499 | if (interrupt_request & CPU_INTERRUPT_HARD) { | |
500 | do_interrupt(env); | |
501 | next_tb = 0; | |
502 | } | |
503 | #elif defined(TARGET_CRIS) | |
504 | if (interrupt_request & CPU_INTERRUPT_HARD | |
505 | && (env->pregs[PR_CCS] & I_FLAG)) { | |
506 | env->exception_index = EXCP_IRQ; | |
507 | do_interrupt(env); | |
508 | next_tb = 0; | |
509 | } | |
510 | if (interrupt_request & CPU_INTERRUPT_NMI | |
511 | && (env->pregs[PR_CCS] & M_FLAG)) { | |
512 | env->exception_index = EXCP_NMI; | |
513 | do_interrupt(env); | |
514 | next_tb = 0; | |
515 | } | |
516 | #elif defined(TARGET_M68K) | |
517 | if (interrupt_request & CPU_INTERRUPT_HARD | |
518 | && ((env->sr & SR_I) >> SR_I_SHIFT) | |
519 | < env->pending_level) { | |
520 | /* Real hardware gets the interrupt vector via an | |
521 | IACK cycle at this point. Current emulated | |
522 | hardware doesn't rely on this, so we | |
523 | provide/save the vector when the interrupt is | |
524 | first signalled. */ | |
525 | env->exception_index = env->pending_vector; | |
526 | do_interrupt(1); | |
527 | next_tb = 0; | |
528 | } | |
529 | #endif | |
530 | /* Don't use the cached interupt_request value, | |
531 | do_interrupt may have updated the EXITTB flag. */ | |
532 | if (env->interrupt_request & CPU_INTERRUPT_EXITTB) { | |
533 | env->interrupt_request &= ~CPU_INTERRUPT_EXITTB; | |
534 | /* ensure that no TB jump will be modified as | |
535 | the program flow was changed */ | |
536 | next_tb = 0; | |
537 | } | |
538 | } | |
539 | if (unlikely(env->exit_request)) { | |
540 | env->exit_request = 0; | |
541 | env->exception_index = EXCP_INTERRUPT; | |
542 | cpu_loop_exit(); | |
543 | } | |
544 | #ifdef CONFIG_DEBUG_EXEC | |
545 | if (qemu_loglevel_mask(CPU_LOG_TB_CPU)) { | |
546 | /* restore flags in standard format */ | |
547 | regs_to_env(); | |
548 | #if defined(TARGET_I386) | |
549 | env->eflags = env->eflags | helper_cc_compute_all(CC_OP) | (DF & DF_MASK); | |
550 | log_cpu_state(env, X86_DUMP_CCOP); | |
551 | env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); | |
552 | #elif defined(TARGET_ARM) | |
553 | log_cpu_state(env, 0); | |
554 | #elif defined(TARGET_SPARC) | |
555 | log_cpu_state(env, 0); | |
556 | #elif defined(TARGET_PPC) | |
557 | log_cpu_state(env, 0); | |
558 | #elif defined(TARGET_M68K) | |
559 | cpu_m68k_flush_flags(env, env->cc_op); | |
560 | env->cc_op = CC_OP_FLAGS; | |
561 | env->sr = (env->sr & 0xffe0) | |
562 | | env->cc_dest | (env->cc_x << 4); | |
563 | log_cpu_state(env, 0); | |
564 | #elif defined(TARGET_MICROBLAZE) | |
565 | log_cpu_state(env, 0); | |
566 | #elif defined(TARGET_MIPS) | |
567 | log_cpu_state(env, 0); | |
568 | #elif defined(TARGET_SH4) | |
569 | log_cpu_state(env, 0); | |
570 | #elif defined(TARGET_ALPHA) | |
571 | log_cpu_state(env, 0); | |
572 | #elif defined(TARGET_CRIS) | |
573 | log_cpu_state(env, 0); | |
574 | #else | |
575 | #error unsupported target CPU | |
576 | #endif | |
577 | } | |
578 | #endif | |
579 | spin_lock(&tb_lock); | |
580 | tb = tb_find_fast(); | |
581 | /* Note: we do it here to avoid a gcc bug on Mac OS X when | |
582 | doing it in tb_find_slow */ | |
583 | if (tb_invalidated_flag) { | |
584 | /* as some TB could have been invalidated because | |
585 | of memory exceptions while generating the code, we | |
586 | must recompute the hash index here */ | |
587 | next_tb = 0; | |
588 | tb_invalidated_flag = 0; | |
589 | } | |
590 | #ifdef CONFIG_DEBUG_EXEC | |
591 | qemu_log_mask(CPU_LOG_EXEC, "Trace 0x%08lx [" TARGET_FMT_lx "] %s\n", | |
592 | (long)tb->tc_ptr, tb->pc, | |
593 | lookup_symbol(tb->pc)); | |
594 | #endif | |
595 | /* see if we can patch the calling TB. When the TB | |
596 | spans two pages, we cannot safely do a direct | |
597 | jump. */ | |
598 | { | |
599 | if (next_tb != 0 && tb->page_addr[1] == -1) { | |
600 | tb_add_jump((TranslationBlock *)(next_tb & ~3), next_tb & 3, tb); | |
601 | } | |
602 | } | |
603 | spin_unlock(&tb_lock); | |
604 | env->current_tb = tb; | |
605 | ||
606 | /* cpu_interrupt might be called while translating the | |
607 | TB, but before it is linked into a potentially | |
608 | infinite loop and becomes env->current_tb. Avoid | |
609 | starting execution if there is a pending interrupt. */ | |
610 | if (unlikely (env->exit_request)) | |
611 | env->current_tb = NULL; | |
612 | ||
613 | while (env->current_tb) { | |
614 | tc_ptr = tb->tc_ptr; | |
615 | /* execute the generated code */ | |
616 | #if defined(__sparc__) && !defined(CONFIG_SOLARIS) | |
617 | #undef env | |
618 | env = cpu_single_env; | |
619 | #define env cpu_single_env | |
620 | #endif | |
621 | next_tb = tcg_qemu_tb_exec(tc_ptr); | |
622 | env->current_tb = NULL; | |
623 | if ((next_tb & 3) == 2) { | |
624 | /* Instruction counter expired. */ | |
625 | int insns_left; | |
626 | tb = (TranslationBlock *)(long)(next_tb & ~3); | |
627 | /* Restore PC. */ | |
628 | cpu_pc_from_tb(env, tb); | |
629 | insns_left = env->icount_decr.u32; | |
630 | if (env->icount_extra && insns_left >= 0) { | |
631 | /* Refill decrementer and continue execution. */ | |
632 | env->icount_extra += insns_left; | |
633 | if (env->icount_extra > 0xffff) { | |
634 | insns_left = 0xffff; | |
635 | } else { | |
636 | insns_left = env->icount_extra; | |
637 | } | |
638 | env->icount_extra -= insns_left; | |
639 | env->icount_decr.u16.low = insns_left; | |
640 | } else { | |
641 | if (insns_left > 0) { | |
642 | /* Execute remaining instructions. */ | |
643 | cpu_exec_nocache(insns_left, tb); | |
644 | } | |
645 | env->exception_index = EXCP_INTERRUPT; | |
646 | next_tb = 0; | |
647 | cpu_loop_exit(); | |
648 | } | |
649 | } | |
650 | } | |
651 | /* reset soft MMU for next block (it can currently | |
652 | only be set by a memory fault) */ | |
653 | } /* for(;;) */ | |
654 | } else { | |
655 | env_to_regs(); | |
656 | } | |
657 | } /* for(;;) */ | |
658 | ||
659 | ||
660 | #if defined(TARGET_I386) | |
661 | /* restore flags in standard format */ | |
662 | env->eflags = env->eflags | helper_cc_compute_all(CC_OP) | (DF & DF_MASK); | |
663 | #elif defined(TARGET_ARM) | |
664 | /* XXX: Save/restore host fpu exception state?. */ | |
665 | #elif defined(TARGET_SPARC) | |
666 | #elif defined(TARGET_PPC) | |
667 | #elif defined(TARGET_M68K) | |
668 | cpu_m68k_flush_flags(env, env->cc_op); | |
669 | env->cc_op = CC_OP_FLAGS; | |
670 | env->sr = (env->sr & 0xffe0) | |
671 | | env->cc_dest | (env->cc_x << 4); | |
672 | #elif defined(TARGET_MICROBLAZE) | |
673 | #elif defined(TARGET_MIPS) | |
674 | #elif defined(TARGET_SH4) | |
675 | #elif defined(TARGET_ALPHA) | |
676 | #elif defined(TARGET_CRIS) | |
677 | #elif defined(TARGET_S390X) | |
678 | /* XXXXX */ | |
679 | #else | |
680 | #error unsupported target CPU | |
681 | #endif | |
682 | ||
683 | /* restore global registers */ | |
684 | #include "hostregs_helper.h" | |
685 | ||
686 | /* fail safe : never use cpu_single_env outside cpu_exec() */ | |
687 | cpu_single_env = NULL; | |
688 | return ret; | |
689 | } | |
690 | ||
691 | /* must only be called from the generated code as an exception can be | |
692 | generated */ | |
693 | void tb_invalidate_page_range(target_ulong start, target_ulong end) | |
694 | { | |
695 | /* XXX: cannot enable it yet because it yields to MMU exception | |
696 | where NIP != read address on PowerPC */ | |
697 | #if 0 | |
698 | target_ulong phys_addr; | |
699 | phys_addr = get_phys_addr_code(env, start); | |
700 | tb_invalidate_phys_page_range(phys_addr, phys_addr + end - start, 0); | |
701 | #endif | |
702 | } | |
703 | ||
704 | #if defined(TARGET_I386) && defined(CONFIG_USER_ONLY) | |
705 | ||
706 | void cpu_x86_load_seg(CPUX86State *s, int seg_reg, int selector) | |
707 | { | |
708 | CPUX86State *saved_env; | |
709 | ||
710 | saved_env = env; | |
711 | env = s; | |
712 | if (!(env->cr[0] & CR0_PE_MASK) || (env->eflags & VM_MASK)) { | |
713 | selector &= 0xffff; | |
714 | cpu_x86_load_seg_cache(env, seg_reg, selector, | |
715 | (selector << 4), 0xffff, 0); | |
716 | } else { | |
717 | helper_load_seg(seg_reg, selector); | |
718 | } | |
719 | env = saved_env; | |
720 | } | |
721 | ||
722 | void cpu_x86_fsave(CPUX86State *s, target_ulong ptr, int data32) | |
723 | { | |
724 | CPUX86State *saved_env; | |
725 | ||
726 | saved_env = env; | |
727 | env = s; | |
728 | ||
729 | helper_fsave(ptr, data32); | |
730 | ||
731 | env = saved_env; | |
732 | } | |
733 | ||
734 | void cpu_x86_frstor(CPUX86State *s, target_ulong ptr, int data32) | |
735 | { | |
736 | CPUX86State *saved_env; | |
737 | ||
738 | saved_env = env; | |
739 | env = s; | |
740 | ||
741 | helper_frstor(ptr, data32); | |
742 | ||
743 | env = saved_env; | |
744 | } | |
745 | ||
746 | #endif /* TARGET_I386 */ | |
747 | ||
748 | #if !defined(CONFIG_SOFTMMU) | |
749 | ||
750 | #if defined(TARGET_I386) | |
751 | #define EXCEPTION_ACTION raise_exception_err(env->exception_index, env->error_code) | |
752 | #else | |
753 | #define EXCEPTION_ACTION cpu_loop_exit() | |
754 | #endif | |
755 | ||
756 | /* 'pc' is the host PC at which the exception was raised. 'address' is | |
757 | the effective address of the memory exception. 'is_write' is 1 if a | |
758 | write caused the exception and otherwise 0'. 'old_set' is the | |
759 | signal set which should be restored */ | |
760 | static inline int handle_cpu_signal(unsigned long pc, unsigned long address, | |
761 | int is_write, sigset_t *old_set, | |
762 | void *puc) | |
763 | { | |
764 | TranslationBlock *tb; | |
765 | int ret; | |
766 | ||
767 | if (cpu_single_env) | |
768 | env = cpu_single_env; /* XXX: find a correct solution for multithread */ | |
769 | #if defined(DEBUG_SIGNAL) | |
770 | qemu_printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n", | |
771 | pc, address, is_write, *(unsigned long *)old_set); | |
772 | #endif | |
773 | /* XXX: locking issue */ | |
774 | if (is_write && page_unprotect(h2g(address), pc, puc)) { | |
775 | return 1; | |
776 | } | |
777 | ||
778 | /* see if it is an MMU fault */ | |
779 | ret = cpu_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0); | |
780 | if (ret < 0) | |
781 | return 0; /* not an MMU fault */ | |
782 | if (ret == 0) | |
783 | return 1; /* the MMU fault was handled without causing real CPU fault */ | |
784 | /* now we have a real cpu fault */ | |
785 | tb = tb_find_pc(pc); | |
786 | if (tb) { | |
787 | /* the PC is inside the translated code. It means that we have | |
788 | a virtual CPU fault */ | |
789 | cpu_restore_state(tb, env, pc, puc); | |
790 | } | |
791 | ||
792 | /* we restore the process signal mask as the sigreturn should | |
793 | do it (XXX: use sigsetjmp) */ | |
794 | sigprocmask(SIG_SETMASK, old_set, NULL); | |
795 | EXCEPTION_ACTION; | |
796 | ||
797 | /* never comes here */ | |
798 | return 1; | |
799 | } | |
800 | ||
801 | #if defined(__i386__) | |
802 | ||
803 | #if defined(__APPLE__) | |
804 | # include <sys/ucontext.h> | |
805 | ||
806 | # define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.eip)) | |
807 | # define TRAP_sig(context) ((context)->uc_mcontext->es.trapno) | |
808 | # define ERROR_sig(context) ((context)->uc_mcontext->es.err) | |
809 | # define MASK_sig(context) ((context)->uc_sigmask) | |
810 | #elif defined (__NetBSD__) | |
811 | # include <ucontext.h> | |
812 | ||
813 | # define EIP_sig(context) ((context)->uc_mcontext.__gregs[_REG_EIP]) | |
814 | # define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO]) | |
815 | # define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR]) | |
816 | # define MASK_sig(context) ((context)->uc_sigmask) | |
817 | #elif defined (__FreeBSD__) || defined(__DragonFly__) | |
818 | # include <ucontext.h> | |
819 | ||
820 | # define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext.mc_eip)) | |
821 | # define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno) | |
822 | # define ERROR_sig(context) ((context)->uc_mcontext.mc_err) | |
823 | # define MASK_sig(context) ((context)->uc_sigmask) | |
824 | #elif defined(__OpenBSD__) | |
825 | # define EIP_sig(context) ((context)->sc_eip) | |
826 | # define TRAP_sig(context) ((context)->sc_trapno) | |
827 | # define ERROR_sig(context) ((context)->sc_err) | |
828 | # define MASK_sig(context) ((context)->sc_mask) | |
829 | #else | |
830 | # define EIP_sig(context) ((context)->uc_mcontext.gregs[REG_EIP]) | |
831 | # define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO]) | |
832 | # define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR]) | |
833 | # define MASK_sig(context) ((context)->uc_sigmask) | |
834 | #endif | |
835 | ||
836 | int cpu_signal_handler(int host_signum, void *pinfo, | |
837 | void *puc) | |
838 | { | |
839 | siginfo_t *info = pinfo; | |
840 | #if defined(__NetBSD__) || defined (__FreeBSD__) || defined(__DragonFly__) | |
841 | ucontext_t *uc = puc; | |
842 | #elif defined(__OpenBSD__) | |
843 | struct sigcontext *uc = puc; | |
844 | #else | |
845 | struct ucontext *uc = puc; | |
846 | #endif | |
847 | unsigned long pc; | |
848 | int trapno; | |
849 | ||
850 | #ifndef REG_EIP | |
851 | /* for glibc 2.1 */ | |
852 | #define REG_EIP EIP | |
853 | #define REG_ERR ERR | |
854 | #define REG_TRAPNO TRAPNO | |
855 | #endif | |
856 | pc = EIP_sig(uc); | |
857 | trapno = TRAP_sig(uc); | |
858 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, | |
859 | trapno == 0xe ? | |
860 | (ERROR_sig(uc) >> 1) & 1 : 0, | |
861 | &MASK_sig(uc), puc); | |
862 | } | |
863 | ||
864 | #elif defined(__x86_64__) | |
865 | ||
866 | #ifdef __NetBSD__ | |
867 | #define PC_sig(context) _UC_MACHINE_PC(context) | |
868 | #define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO]) | |
869 | #define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR]) | |
870 | #define MASK_sig(context) ((context)->uc_sigmask) | |
871 | #elif defined(__OpenBSD__) | |
872 | #define PC_sig(context) ((context)->sc_rip) | |
873 | #define TRAP_sig(context) ((context)->sc_trapno) | |
874 | #define ERROR_sig(context) ((context)->sc_err) | |
875 | #define MASK_sig(context) ((context)->sc_mask) | |
876 | #elif defined (__FreeBSD__) || defined(__DragonFly__) | |
877 | #include <ucontext.h> | |
878 | ||
879 | #define PC_sig(context) (*((unsigned long*)&(context)->uc_mcontext.mc_rip)) | |
880 | #define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno) | |
881 | #define ERROR_sig(context) ((context)->uc_mcontext.mc_err) | |
882 | #define MASK_sig(context) ((context)->uc_sigmask) | |
883 | #else | |
884 | #define PC_sig(context) ((context)->uc_mcontext.gregs[REG_RIP]) | |
885 | #define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO]) | |
886 | #define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR]) | |
887 | #define MASK_sig(context) ((context)->uc_sigmask) | |
888 | #endif | |
889 | ||
890 | int cpu_signal_handler(int host_signum, void *pinfo, | |
891 | void *puc) | |
892 | { | |
893 | siginfo_t *info = pinfo; | |
894 | unsigned long pc; | |
895 | #if defined(__NetBSD__) || defined (__FreeBSD__) || defined(__DragonFly__) | |
896 | ucontext_t *uc = puc; | |
897 | #elif defined(__OpenBSD__) | |
898 | struct sigcontext *uc = puc; | |
899 | #else | |
900 | struct ucontext *uc = puc; | |
901 | #endif | |
902 | ||
903 | pc = PC_sig(uc); | |
904 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, | |
905 | TRAP_sig(uc) == 0xe ? | |
906 | (ERROR_sig(uc) >> 1) & 1 : 0, | |
907 | &MASK_sig(uc), puc); | |
908 | } | |
909 | ||
910 | #elif defined(_ARCH_PPC) | |
911 | ||
912 | /*********************************************************************** | |
913 | * signal context platform-specific definitions | |
914 | * From Wine | |
915 | */ | |
916 | #ifdef linux | |
917 | /* All Registers access - only for local access */ | |
918 | # define REG_sig(reg_name, context) ((context)->uc_mcontext.regs->reg_name) | |
919 | /* Gpr Registers access */ | |
920 | # define GPR_sig(reg_num, context) REG_sig(gpr[reg_num], context) | |
921 | # define IAR_sig(context) REG_sig(nip, context) /* Program counter */ | |
922 | # define MSR_sig(context) REG_sig(msr, context) /* Machine State Register (Supervisor) */ | |
923 | # define CTR_sig(context) REG_sig(ctr, context) /* Count register */ | |
924 | # define XER_sig(context) REG_sig(xer, context) /* User's integer exception register */ | |
925 | # define LR_sig(context) REG_sig(link, context) /* Link register */ | |
926 | # define CR_sig(context) REG_sig(ccr, context) /* Condition register */ | |
927 | /* Float Registers access */ | |
928 | # define FLOAT_sig(reg_num, context) (((double*)((char*)((context)->uc_mcontext.regs+48*4)))[reg_num]) | |
929 | # define FPSCR_sig(context) (*(int*)((char*)((context)->uc_mcontext.regs+(48+32*2)*4))) | |
930 | /* Exception Registers access */ | |
931 | # define DAR_sig(context) REG_sig(dar, context) | |
932 | # define DSISR_sig(context) REG_sig(dsisr, context) | |
933 | # define TRAP_sig(context) REG_sig(trap, context) | |
934 | #endif /* linux */ | |
935 | ||
936 | #ifdef __APPLE__ | |
937 | # include <sys/ucontext.h> | |
938 | typedef struct ucontext SIGCONTEXT; | |
939 | /* All Registers access - only for local access */ | |
940 | # define REG_sig(reg_name, context) ((context)->uc_mcontext->ss.reg_name) | |
941 | # define FLOATREG_sig(reg_name, context) ((context)->uc_mcontext->fs.reg_name) | |
942 | # define EXCEPREG_sig(reg_name, context) ((context)->uc_mcontext->es.reg_name) | |
943 | # define VECREG_sig(reg_name, context) ((context)->uc_mcontext->vs.reg_name) | |
944 | /* Gpr Registers access */ | |
945 | # define GPR_sig(reg_num, context) REG_sig(r##reg_num, context) | |
946 | # define IAR_sig(context) REG_sig(srr0, context) /* Program counter */ | |
947 | # define MSR_sig(context) REG_sig(srr1, context) /* Machine State Register (Supervisor) */ | |
948 | # define CTR_sig(context) REG_sig(ctr, context) | |
949 | # define XER_sig(context) REG_sig(xer, context) /* Link register */ | |
950 | # define LR_sig(context) REG_sig(lr, context) /* User's integer exception register */ | |
951 | # define CR_sig(context) REG_sig(cr, context) /* Condition register */ | |
952 | /* Float Registers access */ | |
953 | # define FLOAT_sig(reg_num, context) FLOATREG_sig(fpregs[reg_num], context) | |
954 | # define FPSCR_sig(context) ((double)FLOATREG_sig(fpscr, context)) | |
955 | /* Exception Registers access */ | |
956 | # define DAR_sig(context) EXCEPREG_sig(dar, context) /* Fault registers for coredump */ | |
957 | # define DSISR_sig(context) EXCEPREG_sig(dsisr, context) | |
958 | # define TRAP_sig(context) EXCEPREG_sig(exception, context) /* number of powerpc exception taken */ | |
959 | #endif /* __APPLE__ */ | |
960 | ||
961 | int cpu_signal_handler(int host_signum, void *pinfo, | |
962 | void *puc) | |
963 | { | |
964 | siginfo_t *info = pinfo; | |
965 | struct ucontext *uc = puc; | |
966 | unsigned long pc; | |
967 | int is_write; | |
968 | ||
969 | pc = IAR_sig(uc); | |
970 | is_write = 0; | |
971 | #if 0 | |
972 | /* ppc 4xx case */ | |
973 | if (DSISR_sig(uc) & 0x00800000) | |
974 | is_write = 1; | |
975 | #else | |
976 | if (TRAP_sig(uc) != 0x400 && (DSISR_sig(uc) & 0x02000000)) | |
977 | is_write = 1; | |
978 | #endif | |
979 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, | |
980 | is_write, &uc->uc_sigmask, puc); | |
981 | } | |
982 | ||
983 | #elif defined(__alpha__) | |
984 | ||
985 | int cpu_signal_handler(int host_signum, void *pinfo, | |
986 | void *puc) | |
987 | { | |
988 | siginfo_t *info = pinfo; | |
989 | struct ucontext *uc = puc; | |
990 | uint32_t *pc = uc->uc_mcontext.sc_pc; | |
991 | uint32_t insn = *pc; | |
992 | int is_write = 0; | |
993 | ||
994 | /* XXX: need kernel patch to get write flag faster */ | |
995 | switch (insn >> 26) { | |
996 | case 0x0d: // stw | |
997 | case 0x0e: // stb | |
998 | case 0x0f: // stq_u | |
999 | case 0x24: // stf | |
1000 | case 0x25: // stg | |
1001 | case 0x26: // sts | |
1002 | case 0x27: // stt | |
1003 | case 0x2c: // stl | |
1004 | case 0x2d: // stq | |
1005 | case 0x2e: // stl_c | |
1006 | case 0x2f: // stq_c | |
1007 | is_write = 1; | |
1008 | } | |
1009 | ||
1010 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, | |
1011 | is_write, &uc->uc_sigmask, puc); | |
1012 | } | |
1013 | #elif defined(__sparc__) | |
1014 | ||
1015 | int cpu_signal_handler(int host_signum, void *pinfo, | |
1016 | void *puc) | |
1017 | { | |
1018 | siginfo_t *info = pinfo; | |
1019 | int is_write; | |
1020 | uint32_t insn; | |
1021 | #if !defined(__arch64__) || defined(CONFIG_SOLARIS) | |
1022 | uint32_t *regs = (uint32_t *)(info + 1); | |
1023 | void *sigmask = (regs + 20); | |
1024 | /* XXX: is there a standard glibc define ? */ | |
1025 | unsigned long pc = regs[1]; | |
1026 | #else | |
1027 | #ifdef __linux__ | |
1028 | struct sigcontext *sc = puc; | |
1029 | unsigned long pc = sc->sigc_regs.tpc; | |
1030 | void *sigmask = (void *)sc->sigc_mask; | |
1031 | #elif defined(__OpenBSD__) | |
1032 | struct sigcontext *uc = puc; | |
1033 | unsigned long pc = uc->sc_pc; | |
1034 | void *sigmask = (void *)(long)uc->sc_mask; | |
1035 | #endif | |
1036 | #endif | |
1037 | ||
1038 | /* XXX: need kernel patch to get write flag faster */ | |
1039 | is_write = 0; | |
1040 | insn = *(uint32_t *)pc; | |
1041 | if ((insn >> 30) == 3) { | |
1042 | switch((insn >> 19) & 0x3f) { | |
1043 | case 0x05: // stb | |
1044 | case 0x15: // stba | |
1045 | case 0x06: // sth | |
1046 | case 0x16: // stha | |
1047 | case 0x04: // st | |
1048 | case 0x14: // sta | |
1049 | case 0x07: // std | |
1050 | case 0x17: // stda | |
1051 | case 0x0e: // stx | |
1052 | case 0x1e: // stxa | |
1053 | case 0x24: // stf | |
1054 | case 0x34: // stfa | |
1055 | case 0x27: // stdf | |
1056 | case 0x37: // stdfa | |
1057 | case 0x26: // stqf | |
1058 | case 0x36: // stqfa | |
1059 | case 0x25: // stfsr | |
1060 | case 0x3c: // casa | |
1061 | case 0x3e: // casxa | |
1062 | is_write = 1; | |
1063 | break; | |
1064 | } | |
1065 | } | |
1066 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, | |
1067 | is_write, sigmask, NULL); | |
1068 | } | |
1069 | ||
1070 | #elif defined(__arm__) | |
1071 | ||
1072 | int cpu_signal_handler(int host_signum, void *pinfo, | |
1073 | void *puc) | |
1074 | { | |
1075 | siginfo_t *info = pinfo; | |
1076 | struct ucontext *uc = puc; | |
1077 | unsigned long pc; | |
1078 | int is_write; | |
1079 | ||
1080 | #if (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ <= 3)) | |
1081 | pc = uc->uc_mcontext.gregs[R15]; | |
1082 | #else | |
1083 | pc = uc->uc_mcontext.arm_pc; | |
1084 | #endif | |
1085 | /* XXX: compute is_write */ | |
1086 | is_write = 0; | |
1087 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, | |
1088 | is_write, | |
1089 | &uc->uc_sigmask, puc); | |
1090 | } | |
1091 | ||
1092 | #elif defined(__mc68000) | |
1093 | ||
1094 | int cpu_signal_handler(int host_signum, void *pinfo, | |
1095 | void *puc) | |
1096 | { | |
1097 | siginfo_t *info = pinfo; | |
1098 | struct ucontext *uc = puc; | |
1099 | unsigned long pc; | |
1100 | int is_write; | |
1101 | ||
1102 | pc = uc->uc_mcontext.gregs[16]; | |
1103 | /* XXX: compute is_write */ | |
1104 | is_write = 0; | |
1105 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, | |
1106 | is_write, | |
1107 | &uc->uc_sigmask, puc); | |
1108 | } | |
1109 | ||
1110 | #elif defined(__ia64) | |
1111 | ||
1112 | #ifndef __ISR_VALID | |
1113 | /* This ought to be in <bits/siginfo.h>... */ | |
1114 | # define __ISR_VALID 1 | |
1115 | #endif | |
1116 | ||
1117 | int cpu_signal_handler(int host_signum, void *pinfo, void *puc) | |
1118 | { | |
1119 | siginfo_t *info = pinfo; | |
1120 | struct ucontext *uc = puc; | |
1121 | unsigned long ip; | |
1122 | int is_write = 0; | |
1123 | ||
1124 | ip = uc->uc_mcontext.sc_ip; | |
1125 | switch (host_signum) { | |
1126 | case SIGILL: | |
1127 | case SIGFPE: | |
1128 | case SIGSEGV: | |
1129 | case SIGBUS: | |
1130 | case SIGTRAP: | |
1131 | if (info->si_code && (info->si_segvflags & __ISR_VALID)) | |
1132 | /* ISR.W (write-access) is bit 33: */ | |
1133 | is_write = (info->si_isr >> 33) & 1; | |
1134 | break; | |
1135 | ||
1136 | default: | |
1137 | break; | |
1138 | } | |
1139 | return handle_cpu_signal(ip, (unsigned long)info->si_addr, | |
1140 | is_write, | |
1141 | &uc->uc_sigmask, puc); | |
1142 | } | |
1143 | ||
1144 | #elif defined(__s390__) | |
1145 | ||
1146 | int cpu_signal_handler(int host_signum, void *pinfo, | |
1147 | void *puc) | |
1148 | { | |
1149 | siginfo_t *info = pinfo; | |
1150 | struct ucontext *uc = puc; | |
1151 | unsigned long pc; | |
1152 | int is_write; | |
1153 | ||
1154 | pc = uc->uc_mcontext.psw.addr; | |
1155 | /* XXX: compute is_write */ | |
1156 | is_write = 0; | |
1157 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, | |
1158 | is_write, &uc->uc_sigmask, puc); | |
1159 | } | |
1160 | ||
1161 | #elif defined(__mips__) | |
1162 | ||
1163 | int cpu_signal_handler(int host_signum, void *pinfo, | |
1164 | void *puc) | |
1165 | { | |
1166 | siginfo_t *info = pinfo; | |
1167 | struct ucontext *uc = puc; | |
1168 | greg_t pc = uc->uc_mcontext.pc; | |
1169 | int is_write; | |
1170 | ||
1171 | /* XXX: compute is_write */ | |
1172 | is_write = 0; | |
1173 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, | |
1174 | is_write, &uc->uc_sigmask, puc); | |
1175 | } | |
1176 | ||
1177 | #elif defined(__hppa__) | |
1178 | ||
1179 | int cpu_signal_handler(int host_signum, void *pinfo, | |
1180 | void *puc) | |
1181 | { | |
1182 | struct siginfo *info = pinfo; | |
1183 | struct ucontext *uc = puc; | |
1184 | unsigned long pc; | |
1185 | int is_write; | |
1186 | ||
1187 | pc = uc->uc_mcontext.sc_iaoq[0]; | |
1188 | /* FIXME: compute is_write */ | |
1189 | is_write = 0; | |
1190 | return handle_cpu_signal(pc, (unsigned long)info->si_addr, | |
1191 | is_write, | |
1192 | &uc->uc_sigmask, puc); | |
1193 | } | |
1194 | ||
1195 | #else | |
1196 | ||
1197 | #error host CPU specific signal handler needed | |
1198 | ||
1199 | #endif | |
1200 | ||
1201 | #endif /* !defined(CONFIG_SOFTMMU) */ |