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Improve instruction name comments for easier searching
[qemu-kvm/fedora.git] / cpu-exec.c
blobef378ac55bae338c2ee92371e629c3d3683f0858
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, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA
19 */
20 #include "config.h"
21 #include "exec.h"
22 #include "disas.h"
23 #include "tcg.h"
24 #include "kvm.h"
25
26 #if !defined(CONFIG_SOFTMMU)
27 #undef EAX
28 #undef ECX
29 #undef EDX
30 #undef EBX
31 #undef ESP
32 #undef EBP
33 #undef ESI
34 #undef EDI
35 #undef EIP
36 #include <signal.h>
37 #ifdef __linux__
38 #include <sys/ucontext.h>
39 #endif
40 #endif
41
42 #if defined(__sparc__) && !defined(HOST_SOLARIS)
43 // Work around ugly bugs in glibc that mangle global register contents
44 #undef env
45 #define env cpu_single_env
46 #endif
47
48 int tb_invalidated_flag;
49
50 //#define DEBUG_EXEC
51 //#define DEBUG_SIGNAL
52
53 int qemu_cpu_has_work(CPUState *env)
54 {
55 return cpu_has_work(env);
56 }
57
58 void cpu_loop_exit(void)
59 {
60 /* NOTE: the register at this point must be saved by hand because
61 longjmp restore them */
62 regs_to_env();
63 longjmp(env->jmp_env, 1);
64 }
65
66 /* exit the current TB from a signal handler. The host registers are
67 restored in a state compatible with the CPU emulator
68 */
69 void cpu_resume_from_signal(CPUState *env1, void *puc)
70 {
71 #if !defined(CONFIG_SOFTMMU)
72 #ifdef __linux__
73 struct ucontext *uc = puc;
74 #elif defined(__OpenBSD__)
75 struct sigcontext *uc = puc;
76 #endif
77 #endif
78
79 env = env1;
80
81 /* XXX: restore cpu registers saved in host registers */
82
83 #if !defined(CONFIG_SOFTMMU)
84 if (puc) {
85 /* XXX: use siglongjmp ? */
86 #ifdef __linux__
87 sigprocmask(SIG_SETMASK, &uc->uc_sigmask, NULL);
88 #elif defined(__OpenBSD__)
89 sigprocmask(SIG_SETMASK, &uc->sc_mask, NULL);
90 #endif
91 }
92 #endif
93 env->exception_index = -1;
94 longjmp(env->jmp_env, 1);
95 }
96
97 /* Execute the code without caching the generated code. An interpreter
98 could be used if available. */
99 static void cpu_exec_nocache(int max_cycles, TranslationBlock *orig_tb)
100 {
101 unsigned long next_tb;
102 TranslationBlock *tb;
103
104 /* Should never happen.
105 We only end up here when an existing TB is too long. */
106 if (max_cycles > CF_COUNT_MASK)
107 max_cycles = CF_COUNT_MASK;
108
109 tb = tb_gen_code(env, orig_tb->pc, orig_tb->cs_base, orig_tb->flags,
110 max_cycles);
111 env->current_tb = tb;
112 /* execute the generated code */
113 next_tb = tcg_qemu_tb_exec(tb->tc_ptr);
114
115 if ((next_tb & 3) == 2) {
116 /* Restore PC. This may happen if async event occurs before
117 the TB starts executing. */
118 cpu_pc_from_tb(env, tb);
119 }
120 tb_phys_invalidate(tb, -1);
121 tb_free(tb);
122 }
123
124 static TranslationBlock *tb_find_slow(target_ulong pc,
125 target_ulong cs_base,
126 uint64_t flags)
127 {
128 TranslationBlock *tb, **ptb1;
129 unsigned int h;
130 target_ulong phys_pc, phys_page1, phys_page2, virt_page2;
131
132 tb_invalidated_flag = 0;
133
134 regs_to_env(); /* XXX: do it just before cpu_gen_code() */
135
136 /* find translated block using physical mappings */
137 phys_pc = get_phys_addr_code(env, pc);
138 phys_page1 = phys_pc & TARGET_PAGE_MASK;
139 phys_page2 = -1;
140 h = tb_phys_hash_func(phys_pc);
141 ptb1 = &tb_phys_hash[h];
142 for(;;) {
143 tb = *ptb1;
144 if (!tb)
145 goto not_found;
146 if (tb->pc == pc &&
147 tb->page_addr[0] == phys_page1 &&
148 tb->cs_base == cs_base &&
149 tb->flags == flags) {
150 /* check next page if needed */
151 if (tb->page_addr[1] != -1) {
152 virt_page2 = (pc & TARGET_PAGE_MASK) +
153 TARGET_PAGE_SIZE;
154 phys_page2 = get_phys_addr_code(env, virt_page2);
155 if (tb->page_addr[1] == phys_page2)
156 goto found;
157 } else {
158 goto found;
159 }
160 }
161 ptb1 = &tb->phys_hash_next;
162 }
163 not_found:
164 /* if no translated code available, then translate it now */
165 tb = tb_gen_code(env, pc, cs_base, flags, 0);
166
167 found:
168 /* we add the TB in the virtual pc hash table */
169 env->tb_jmp_cache[tb_jmp_cache_hash_func(pc)] = tb;
170 return tb;
171 }
172
173 static inline TranslationBlock *tb_find_fast(void)
174 {
175 TranslationBlock *tb;
176 target_ulong cs_base, pc;
177 int flags;
178
179 /* we record a subset of the CPU state. It will
180 always be the same before a given translated block
181 is executed. */
182 cpu_get_tb_cpu_state(env, &pc, &cs_base, &flags);
183 tb = env->tb_jmp_cache[tb_jmp_cache_hash_func(pc)];
184 if (unlikely(!tb || tb->pc != pc || tb->cs_base != cs_base ||
185 tb->flags != flags)) {
186 tb = tb_find_slow(pc, cs_base, flags);
187 }
188 return tb;
189 }
190
191 static CPUDebugExcpHandler *debug_excp_handler;
192
193 CPUDebugExcpHandler *cpu_set_debug_excp_handler(CPUDebugExcpHandler *handler)
194 {
195 CPUDebugExcpHandler *old_handler = debug_excp_handler;
196
197 debug_excp_handler = handler;
198 return old_handler;
199 }
200
201 static void cpu_handle_debug_exception(CPUState *env)
202 {
203 CPUWatchpoint *wp;
204
205 if (!env->watchpoint_hit)
206 TAILQ_FOREACH(wp, &env->watchpoints, entry)
207 wp->flags &= ~BP_WATCHPOINT_HIT;
208
209 if (debug_excp_handler)
210 debug_excp_handler(env);
211 }
212
213 /* main execution loop */
214
215 int cpu_exec(CPUState *env1)
216 {
217 #define DECLARE_HOST_REGS 1
218 #include "hostregs_helper.h"
219 int ret, interrupt_request;
220 TranslationBlock *tb;
221 uint8_t *tc_ptr;
222 unsigned long next_tb;
223
224 if (cpu_halted(env1) == EXCP_HALTED)
225 return EXCP_HALTED;
226
227 cpu_single_env = env1;
228
229 /* first we save global registers */
230 #define SAVE_HOST_REGS 1
231 #include "hostregs_helper.h"
232 env = env1;
233
234 env_to_regs();
235 #if defined(TARGET_I386)
236 /* put eflags in CPU temporary format */
237 CC_SRC = env->eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
238 DF = 1 - (2 * ((env->eflags >> 10) & 1));
239 CC_OP = CC_OP_EFLAGS;
240 env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
241 #elif defined(TARGET_SPARC)
242 #elif defined(TARGET_M68K)
243 env->cc_op = CC_OP_FLAGS;
244 env->cc_dest = env->sr & 0xf;
245 env->cc_x = (env->sr >> 4) & 1;
246 #elif defined(TARGET_ALPHA)
247 #elif defined(TARGET_ARM)
248 #elif defined(TARGET_PPC)
249 #elif defined(TARGET_MIPS)
250 #elif defined(TARGET_SH4)
251 #elif defined(TARGET_CRIS)
252 /* XXXXX */
253 #else
254 #error unsupported target CPU
255 #endif
256 env->exception_index = -1;
257
258 /* prepare setjmp context for exception handling */
259 for(;;) {
260 if (setjmp(env->jmp_env) == 0) {
261 #if defined(__sparc__) && !defined(HOST_SOLARIS)
262 #undef env
263 env = cpu_single_env;
264 #define env cpu_single_env
265 #endif
266 env->current_tb = NULL;
267 /* if an exception is pending, we execute it here */
268 if (env->exception_index >= 0) {
269 if (env->exception_index >= EXCP_INTERRUPT) {
270 /* exit request from the cpu execution loop */
271 ret = env->exception_index;
272 if (ret == EXCP_DEBUG)
273 cpu_handle_debug_exception(env);
274 break;
275 } else {
276 #if defined(CONFIG_USER_ONLY)
277 /* if user mode only, we simulate a fake exception
278 which will be handled outside the cpu execution
279 loop */
280 #if defined(TARGET_I386)
281 do_interrupt_user(env->exception_index,
282 env->exception_is_int,
283 env->error_code,
284 env->exception_next_eip);
285 /* successfully delivered */
286 env->old_exception = -1;
287 #endif
288 ret = env->exception_index;
289 break;
290 #else
291 #if defined(TARGET_I386)
292 /* simulate a real cpu exception. On i386, it can
293 trigger new exceptions, but we do not handle
294 double or triple faults yet. */
295 do_interrupt(env->exception_index,
296 env->exception_is_int,
297 env->error_code,
298 env->exception_next_eip, 0);
299 /* successfully delivered */
300 env->old_exception = -1;
301 #elif defined(TARGET_PPC)
302 do_interrupt(env);
303 #elif defined(TARGET_MIPS)
304 do_interrupt(env);
305 #elif defined(TARGET_SPARC)
306 do_interrupt(env);
307 #elif defined(TARGET_ARM)
308 do_interrupt(env);
309 #elif defined(TARGET_SH4)
310 do_interrupt(env);
311 #elif defined(TARGET_ALPHA)
312 do_interrupt(env);
313 #elif defined(TARGET_CRIS)
314 do_interrupt(env);
315 #elif defined(TARGET_M68K)
316 do_interrupt(0);
317 #endif
318 #endif
319 }
320 env->exception_index = -1;
321 }
322 #ifdef CONFIG_KQEMU
323 if (kqemu_is_ok(env) && env->interrupt_request == 0 && env->exit_request == 0) {
324 int ret;
325 env->eflags = env->eflags | helper_cc_compute_all(CC_OP) | (DF & DF_MASK);
326 ret = kqemu_cpu_exec(env);
327 /* put eflags in CPU temporary format */
328 CC_SRC = env->eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
329 DF = 1 - (2 * ((env->eflags >> 10) & 1));
330 CC_OP = CC_OP_EFLAGS;
331 env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
332 if (ret == 1) {
333 /* exception */
334 longjmp(env->jmp_env, 1);
335 } else if (ret == 2) {
336 /* softmmu execution needed */
337 } else {
338 if (env->interrupt_request != 0 || env->exit_request != 0) {
339 /* hardware interrupt will be executed just after */
340 } else {
341 /* otherwise, we restart */
342 longjmp(env->jmp_env, 1);
343 }
344 }
345 }
346 #endif
347
348 if (kvm_enabled()) {
349 kvm_cpu_exec(env);
350 longjmp(env->jmp_env, 1);
351 }
352
353 next_tb = 0; /* force lookup of first TB */
354 for(;;) {
355 interrupt_request = env->interrupt_request;
356 if (unlikely(interrupt_request)) {
357 if (unlikely(env->singlestep_enabled & SSTEP_NOIRQ)) {
358 /* Mask out external interrupts for this step. */
359 interrupt_request &= ~(CPU_INTERRUPT_HARD |
360 CPU_INTERRUPT_FIQ |
361 CPU_INTERRUPT_SMI |
362 CPU_INTERRUPT_NMI);
363 }
364 if (interrupt_request & CPU_INTERRUPT_DEBUG) {
365 env->interrupt_request &= ~CPU_INTERRUPT_DEBUG;
366 env->exception_index = EXCP_DEBUG;
367 cpu_loop_exit();
368 }
369 #if defined(TARGET_ARM) || defined(TARGET_SPARC) || defined(TARGET_MIPS) || \
370 defined(TARGET_PPC) || defined(TARGET_ALPHA) || defined(TARGET_CRIS)
371 if (interrupt_request & CPU_INTERRUPT_HALT) {
372 env->interrupt_request &= ~CPU_INTERRUPT_HALT;
373 env->halted = 1;
374 env->exception_index = EXCP_HLT;
375 cpu_loop_exit();
376 }
377 #endif
378 #if defined(TARGET_I386)
379 if (env->hflags2 & HF2_GIF_MASK) {
380 if ((interrupt_request & CPU_INTERRUPT_SMI) &&
381 !(env->hflags & HF_SMM_MASK)) {
382 svm_check_intercept(SVM_EXIT_SMI);
383 env->interrupt_request &= ~CPU_INTERRUPT_SMI;
384 do_smm_enter();
385 next_tb = 0;
386 } else if ((interrupt_request & CPU_INTERRUPT_NMI) &&
387 !(env->hflags2 & HF2_NMI_MASK)) {
388 env->interrupt_request &= ~CPU_INTERRUPT_NMI;
389 env->hflags2 |= HF2_NMI_MASK;
390 do_interrupt(EXCP02_NMI, 0, 0, 0, 1);
391 next_tb = 0;
392 } else if ((interrupt_request & CPU_INTERRUPT_HARD) &&
393 (((env->hflags2 & HF2_VINTR_MASK) &&
394 (env->hflags2 & HF2_HIF_MASK)) ||
395 (!(env->hflags2 & HF2_VINTR_MASK) &&
396 (env->eflags & IF_MASK &&
397 !(env->hflags & HF_INHIBIT_IRQ_MASK))))) {
398 int intno;
399 svm_check_intercept(SVM_EXIT_INTR);
400 env->interrupt_request &= ~(CPU_INTERRUPT_HARD | CPU_INTERRUPT_VIRQ);
401 intno = cpu_get_pic_interrupt(env);
402 qemu_log_mask(CPU_LOG_TB_IN_ASM, "Servicing hardware INT=0x%02x\n", intno);
403 #if defined(__sparc__) && !defined(HOST_SOLARIS)
404 #undef env
405 env = cpu_single_env;
406 #define env cpu_single_env
407 #endif
408 do_interrupt(intno, 0, 0, 0, 1);
409 /* ensure that no TB jump will be modified as
410 the program flow was changed */
411 next_tb = 0;
412 #if !defined(CONFIG_USER_ONLY)
413 } else if ((interrupt_request & CPU_INTERRUPT_VIRQ) &&
414 (env->eflags & IF_MASK) &&
415 !(env->hflags & HF_INHIBIT_IRQ_MASK)) {
416 int intno;
417 /* FIXME: this should respect TPR */
418 svm_check_intercept(SVM_EXIT_VINTR);
419 intno = ldl_phys(env->vm_vmcb + offsetof(struct vmcb, control.int_vector));
420 qemu_log_mask(CPU_LOG_TB_IN_ASM, "Servicing virtual hardware INT=0x%02x\n", intno);
421 do_interrupt(intno, 0, 0, 0, 1);
422 env->interrupt_request &= ~CPU_INTERRUPT_VIRQ;
423 next_tb = 0;
424 #endif
425 }
426 }
427 #elif defined(TARGET_PPC)
428 #if 0
429 if ((interrupt_request & CPU_INTERRUPT_RESET)) {
430 cpu_ppc_reset(env);
431 }
432 #endif
433 if (interrupt_request & CPU_INTERRUPT_HARD) {
434 ppc_hw_interrupt(env);
435 if (env->pending_interrupts == 0)
436 env->interrupt_request &= ~CPU_INTERRUPT_HARD;
437 next_tb = 0;
438 }
439 #elif defined(TARGET_MIPS)
440 if ((interrupt_request & CPU_INTERRUPT_HARD) &&
441 (env->CP0_Status & env->CP0_Cause & CP0Ca_IP_mask) &&
442 (env->CP0_Status & (1 << CP0St_IE)) &&
443 !(env->CP0_Status & (1 << CP0St_EXL)) &&
444 !(env->CP0_Status & (1 << CP0St_ERL)) &&
445 !(env->hflags & MIPS_HFLAG_DM)) {
446 /* Raise it */
447 env->exception_index = EXCP_EXT_INTERRUPT;
448 env->error_code = 0;
449 do_interrupt(env);
450 next_tb = 0;
451 }
452 #elif defined(TARGET_SPARC)
453 if ((interrupt_request & CPU_INTERRUPT_HARD) &&
454 (env->psret != 0)) {
455 int pil = env->interrupt_index & 15;
456 int type = env->interrupt_index & 0xf0;
457
458 if (((type == TT_EXTINT) &&
459 (pil == 15 || pil > env->psrpil)) ||
460 type != TT_EXTINT) {
461 env->interrupt_request &= ~CPU_INTERRUPT_HARD;
462 env->exception_index = env->interrupt_index;
463 do_interrupt(env);
464 env->interrupt_index = 0;
465 #if !defined(TARGET_SPARC64) && !defined(CONFIG_USER_ONLY)
466 cpu_check_irqs(env);
467 #endif
468 next_tb = 0;
469 }
470 } else if (interrupt_request & CPU_INTERRUPT_TIMER) {
471 //do_interrupt(0, 0, 0, 0, 0);
472 env->interrupt_request &= ~CPU_INTERRUPT_TIMER;
473 }
474 #elif defined(TARGET_ARM)
475 if (interrupt_request & CPU_INTERRUPT_FIQ
476 && !(env->uncached_cpsr & CPSR_F)) {
477 env->exception_index = EXCP_FIQ;
478 do_interrupt(env);
479 next_tb = 0;
480 }
481 /* ARMv7-M interrupt return works by loading a magic value
482 into the PC. On real hardware the load causes the
483 return to occur. The qemu implementation performs the
484 jump normally, then does the exception return when the
485 CPU tries to execute code at the magic address.
486 This will cause the magic PC value to be pushed to
487 the stack if an interrupt occured at the wrong time.
488 We avoid this by disabling interrupts when
489 pc contains a magic address. */
490 if (interrupt_request & CPU_INTERRUPT_HARD
491 && ((IS_M(env) && env->regs[15] < 0xfffffff0)
492 || !(env->uncached_cpsr & CPSR_I))) {
493 env->exception_index = EXCP_IRQ;
494 do_interrupt(env);
495 next_tb = 0;
496 }
497 #elif defined(TARGET_SH4)
498 if (interrupt_request & CPU_INTERRUPT_HARD) {
499 do_interrupt(env);
500 next_tb = 0;
501 }
502 #elif defined(TARGET_ALPHA)
503 if (interrupt_request & CPU_INTERRUPT_HARD) {
504 do_interrupt(env);
505 next_tb = 0;
506 }
507 #elif defined(TARGET_CRIS)
508 if (interrupt_request & CPU_INTERRUPT_HARD
509 && (env->pregs[PR_CCS] & I_FLAG)) {
510 env->exception_index = EXCP_IRQ;
511 do_interrupt(env);
512 next_tb = 0;
513 }
514 if (interrupt_request & CPU_INTERRUPT_NMI
515 && (env->pregs[PR_CCS] & M_FLAG)) {
516 env->exception_index = EXCP_NMI;
517 do_interrupt(env);
518 next_tb = 0;
519 }
520 #elif defined(TARGET_M68K)
521 if (interrupt_request & CPU_INTERRUPT_HARD
522 && ((env->sr & SR_I) >> SR_I_SHIFT)
523 < env->pending_level) {
524 /* Real hardware gets the interrupt vector via an
525 IACK cycle at this point. Current emulated
526 hardware doesn't rely on this, so we
527 provide/save the vector when the interrupt is
528 first signalled. */
529 env->exception_index = env->pending_vector;
530 do_interrupt(1);
531 next_tb = 0;
532 }
533 #endif
534 /* Don't use the cached interupt_request value,
535 do_interrupt may have updated the EXITTB flag. */
536 if (env->interrupt_request & CPU_INTERRUPT_EXITTB) {
537 env->interrupt_request &= ~CPU_INTERRUPT_EXITTB;
538 /* ensure that no TB jump will be modified as
539 the program flow was changed */
540 next_tb = 0;
541 }
542 }
543 if (unlikely(env->exit_request)) {
544 env->exit_request = 0;
545 env->exception_index = EXCP_INTERRUPT;
546 cpu_loop_exit();
547 }
548 #ifdef DEBUG_EXEC
549 if (qemu_loglevel_mask(CPU_LOG_TB_CPU)) {
550 /* restore flags in standard format */
551 regs_to_env();
552 #if defined(TARGET_I386)
553 env->eflags = env->eflags | helper_cc_compute_all(CC_OP) | (DF & DF_MASK);
554 log_cpu_state(env, X86_DUMP_CCOP);
555 env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
556 #elif defined(TARGET_ARM)
557 log_cpu_state(env, 0);
558 #elif defined(TARGET_SPARC)
559 log_cpu_state(env, 0);
560 #elif defined(TARGET_PPC)
561 log_cpu_state(env, 0);
562 #elif defined(TARGET_M68K)
563 cpu_m68k_flush_flags(env, env->cc_op);
564 env->cc_op = CC_OP_FLAGS;
565 env->sr = (env->sr & 0xffe0)
566 | env->cc_dest | (env->cc_x << 4);
567 log_cpu_state(env, 0);
568 #elif defined(TARGET_MIPS)
569 log_cpu_state(env, 0);
570 #elif defined(TARGET_SH4)
571 log_cpu_state(env, 0);
572 #elif defined(TARGET_ALPHA)
573 log_cpu_state(env, 0);
574 #elif defined(TARGET_CRIS)
575 log_cpu_state(env, 0);
576 #else
577 #error unsupported target CPU
578 #endif
579 }
580 #endif
581 spin_lock(&tb_lock);
582 tb = tb_find_fast();
583 /* Note: we do it here to avoid a gcc bug on Mac OS X when
584 doing it in tb_find_slow */
585 if (tb_invalidated_flag) {
586 /* as some TB could have been invalidated because
587 of memory exceptions while generating the code, we
588 must recompute the hash index here */
589 next_tb = 0;
590 tb_invalidated_flag = 0;
591 }
592 #ifdef DEBUG_EXEC
593 qemu_log_mask(CPU_LOG_EXEC, "Trace 0x%08lx [" TARGET_FMT_lx "] %s\n",
594 (long)tb->tc_ptr, tb->pc,
595 lookup_symbol(tb->pc));
596 #endif
597 /* see if we can patch the calling TB. When the TB
598 spans two pages, we cannot safely do a direct
599 jump. */
600 {
601 if (next_tb != 0 &&
602 #ifdef CONFIG_KQEMU
603 (env->kqemu_enabled != 2) &&
604 #endif
605 tb->page_addr[1] == -1) {
606 tb_add_jump((TranslationBlock *)(next_tb & ~3), next_tb & 3, tb);
607 }
608 }
609 spin_unlock(&tb_lock);
610 env->current_tb = tb;
611
612 /* cpu_interrupt might be called while translating the
613 TB, but before it is linked into a potentially
614 infinite loop and becomes env->current_tb. Avoid
615 starting execution if there is a pending interrupt. */
616 if (unlikely (env->exit_request))
617 env->current_tb = NULL;
618
619 while (env->current_tb) {
620 tc_ptr = tb->tc_ptr;
621 /* execute the generated code */
622 #if defined(__sparc__) && !defined(HOST_SOLARIS)
623 #undef env
624 env = cpu_single_env;
625 #define env cpu_single_env
626 #endif
627 next_tb = tcg_qemu_tb_exec(tc_ptr);
628 env->current_tb = NULL;
629 if ((next_tb & 3) == 2) {
630 /* Instruction counter expired. */
631 int insns_left;
632 tb = (TranslationBlock *)(long)(next_tb & ~3);
633 /* Restore PC. */
634 cpu_pc_from_tb(env, tb);
635 insns_left = env->icount_decr.u32;
636 if (env->icount_extra && insns_left >= 0) {
637 /* Refill decrementer and continue execution. */
638 env->icount_extra += insns_left;
639 if (env->icount_extra > 0xffff) {
640 insns_left = 0xffff;
641 } else {
642 insns_left = env->icount_extra;
643 }
644 env->icount_extra -= insns_left;
645 env->icount_decr.u16.low = insns_left;
646 } else {
647 if (insns_left > 0) {
648 /* Execute remaining instructions. */
649 cpu_exec_nocache(insns_left, tb);
650 }
651 env->exception_index = EXCP_INTERRUPT;
652 next_tb = 0;
653 cpu_loop_exit();
654 }
655 }
656 }
657 /* reset soft MMU for next block (it can currently
658 only be set by a memory fault) */
659 #if defined(CONFIG_KQEMU)
660 #define MIN_CYCLE_BEFORE_SWITCH (100 * 1000)
661 if (kqemu_is_ok(env) &&
662 (cpu_get_time_fast() - env->last_io_time) >= MIN_CYCLE_BEFORE_SWITCH) {
663 cpu_loop_exit();
664 }
665 #endif
666 } /* for(;;) */
667 } else {
668 env_to_regs();
669 }
670 } /* for(;;) */
671
672
673 #if defined(TARGET_I386)
674 /* restore flags in standard format */
675 env->eflags = env->eflags | helper_cc_compute_all(CC_OP) | (DF & DF_MASK);
676 #elif defined(TARGET_ARM)
677 /* XXX: Save/restore host fpu exception state?. */
678 #elif defined(TARGET_SPARC)
679 #elif defined(TARGET_PPC)
680 #elif defined(TARGET_M68K)
681 cpu_m68k_flush_flags(env, env->cc_op);
682 env->cc_op = CC_OP_FLAGS;
683 env->sr = (env->sr & 0xffe0)
684 | env->cc_dest | (env->cc_x << 4);
685 #elif defined(TARGET_MIPS)
686 #elif defined(TARGET_SH4)
687 #elif defined(TARGET_ALPHA)
688 #elif defined(TARGET_CRIS)
689 /* XXXXX */
690 #else
691 #error unsupported target CPU
692 #endif
693
694 /* restore global registers */
695 #include "hostregs_helper.h"
696
697 /* fail safe : never use cpu_single_env outside cpu_exec() */
698 cpu_single_env = NULL;
699 return ret;
700 }
701
702 /* must only be called from the generated code as an exception can be
703 generated */
704 void tb_invalidate_page_range(target_ulong start, target_ulong end)
705 {
706 /* XXX: cannot enable it yet because it yields to MMU exception
707 where NIP != read address on PowerPC */
708 #if 0
709 target_ulong phys_addr;
710 phys_addr = get_phys_addr_code(env, start);
711 tb_invalidate_phys_page_range(phys_addr, phys_addr + end - start, 0);
712 #endif
713 }
714
715 #if defined(TARGET_I386) && defined(CONFIG_USER_ONLY)
716
717 void cpu_x86_load_seg(CPUX86State *s, int seg_reg, int selector)
718 {
719 CPUX86State *saved_env;
720
721 saved_env = env;
722 env = s;
723 if (!(env->cr[0] & CR0_PE_MASK) || (env->eflags & VM_MASK)) {
724 selector &= 0xffff;
725 cpu_x86_load_seg_cache(env, seg_reg, selector,
726 (selector << 4), 0xffff, 0);
727 } else {
728 helper_load_seg(seg_reg, selector);
729 }
730 env = saved_env;
731 }
732
733 void cpu_x86_fsave(CPUX86State *s, target_ulong ptr, int data32)
734 {
735 CPUX86State *saved_env;
736
737 saved_env = env;
738 env = s;
739
740 helper_fsave(ptr, data32);
741
742 env = saved_env;
743 }
744
745 void cpu_x86_frstor(CPUX86State *s, target_ulong ptr, int data32)
746 {
747 CPUX86State *saved_env;
748
749 saved_env = env;
750 env = s;
751
752 helper_frstor(ptr, data32);
753
754 env = saved_env;
755 }
756
757 #endif /* TARGET_I386 */
758
759 #if !defined(CONFIG_SOFTMMU)
760
761 #if defined(TARGET_I386)
762
763 /* 'pc' is the host PC at which the exception was raised. 'address' is
764 the effective address of the memory exception. 'is_write' is 1 if a
765 write caused the exception and otherwise 0'. 'old_set' is the
766 signal set which should be restored */
767 static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
768 int is_write, sigset_t *old_set,
769 void *puc)
770 {
771 TranslationBlock *tb;
772 int ret;
773
774 if (cpu_single_env)
775 env = cpu_single_env; /* XXX: find a correct solution for multithread */
776 #if defined(DEBUG_SIGNAL)
777 qemu_printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
778 pc, address, is_write, *(unsigned long *)old_set);
779 #endif
780 /* XXX: locking issue */
781 if (is_write && page_unprotect(h2g(address), pc, puc)) {
782 return 1;
783 }
784
785 /* see if it is an MMU fault */
786 ret = cpu_x86_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
787 if (ret < 0)
788 return 0; /* not an MMU fault */
789 if (ret == 0)
790 return 1; /* the MMU fault was handled without causing real CPU fault */
791 /* now we have a real cpu fault */
792 tb = tb_find_pc(pc);
793 if (tb) {
794 /* the PC is inside the translated code. It means that we have
795 a virtual CPU fault */
796 cpu_restore_state(tb, env, pc, puc);
797 }
798 if (ret == 1) {
799 #if 0
800 printf("PF exception: EIP=0x%08x CR2=0x%08x error=0x%x\n",
801 env->eip, env->cr[2], env->error_code);
802 #endif
803 /* we restore the process signal mask as the sigreturn should
804 do it (XXX: use sigsetjmp) */
805 sigprocmask(SIG_SETMASK, old_set, NULL);
806 raise_exception_err(env->exception_index, env->error_code);
807 } else {
808 /* activate soft MMU for this block */
809 env->hflags |= HF_SOFTMMU_MASK;
810 cpu_resume_from_signal(env, puc);
811 }
812 /* never comes here */
813 return 1;
814 }
815
816 #elif defined(TARGET_ARM)
817 static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
818 int is_write, sigset_t *old_set,
819 void *puc)
820 {
821 TranslationBlock *tb;
822 int ret;
823
824 if (cpu_single_env)
825 env = cpu_single_env; /* XXX: find a correct solution for multithread */
826 #if defined(DEBUG_SIGNAL)
827 printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
828 pc, address, is_write, *(unsigned long *)old_set);
829 #endif
830 /* XXX: locking issue */
831 if (is_write && page_unprotect(h2g(address), pc, puc)) {
832 return 1;
833 }
834 /* see if it is an MMU fault */
835 ret = cpu_arm_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
836 if (ret < 0)
837 return 0; /* not an MMU fault */
838 if (ret == 0)
839 return 1; /* the MMU fault was handled without causing real CPU fault */
840 /* now we have a real cpu fault */
841 tb = tb_find_pc(pc);
842 if (tb) {
843 /* the PC is inside the translated code. It means that we have
844 a virtual CPU fault */
845 cpu_restore_state(tb, env, pc, puc);
846 }
847 /* we restore the process signal mask as the sigreturn should
848 do it (XXX: use sigsetjmp) */
849 sigprocmask(SIG_SETMASK, old_set, NULL);
850 cpu_loop_exit();
851 /* never comes here */
852 return 1;
853 }
854 #elif defined(TARGET_SPARC)
855 static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
856 int is_write, sigset_t *old_set,
857 void *puc)
858 {
859 TranslationBlock *tb;
860 int ret;
861
862 if (cpu_single_env)
863 env = cpu_single_env; /* XXX: find a correct solution for multithread */
864 #if defined(DEBUG_SIGNAL)
865 printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
866 pc, address, is_write, *(unsigned long *)old_set);
867 #endif
868 /* XXX: locking issue */
869 if (is_write && page_unprotect(h2g(address), pc, puc)) {
870 return 1;
871 }
872 /* see if it is an MMU fault */
873 ret = cpu_sparc_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
874 if (ret < 0)
875 return 0; /* not an MMU fault */
876 if (ret == 0)
877 return 1; /* the MMU fault was handled without causing real CPU fault */
878 /* now we have a real cpu fault */
879 tb = tb_find_pc(pc);
880 if (tb) {
881 /* the PC is inside the translated code. It means that we have
882 a virtual CPU fault */
883 cpu_restore_state(tb, env, pc, puc);
884 }
885 /* we restore the process signal mask as the sigreturn should
886 do it (XXX: use sigsetjmp) */
887 sigprocmask(SIG_SETMASK, old_set, NULL);
888 cpu_loop_exit();
889 /* never comes here */
890 return 1;
891 }
892 #elif defined (TARGET_PPC)
893 static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
894 int is_write, sigset_t *old_set,
895 void *puc)
896 {
897 TranslationBlock *tb;
898 int ret;
899
900 if (cpu_single_env)
901 env = cpu_single_env; /* XXX: find a correct solution for multithread */
902 #if defined(DEBUG_SIGNAL)
903 printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
904 pc, address, is_write, *(unsigned long *)old_set);
905 #endif
906 /* XXX: locking issue */
907 if (is_write && page_unprotect(h2g(address), pc, puc)) {
908 return 1;
909 }
910
911 /* see if it is an MMU fault */
912 ret = cpu_ppc_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
913 if (ret < 0)
914 return 0; /* not an MMU fault */
915 if (ret == 0)
916 return 1; /* the MMU fault was handled without causing real CPU fault */
917
918 /* now we have a real cpu fault */
919 tb = tb_find_pc(pc);
920 if (tb) {
921 /* the PC is inside the translated code. It means that we have
922 a virtual CPU fault */
923 cpu_restore_state(tb, env, pc, puc);
924 }
925 if (ret == 1) {
926 #if 0
927 printf("PF exception: NIP=0x%08x error=0x%x %p\n",
928 env->nip, env->error_code, tb);
929 #endif
930 /* we restore the process signal mask as the sigreturn should
931 do it (XXX: use sigsetjmp) */
932 sigprocmask(SIG_SETMASK, old_set, NULL);
933 cpu_loop_exit();
934 } else {
935 /* activate soft MMU for this block */
936 cpu_resume_from_signal(env, puc);
937 }
938 /* never comes here */
939 return 1;
940 }
941
942 #elif defined(TARGET_M68K)
943 static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
944 int is_write, sigset_t *old_set,
945 void *puc)
946 {
947 TranslationBlock *tb;
948 int ret;
949
950 if (cpu_single_env)
951 env = cpu_single_env; /* XXX: find a correct solution for multithread */
952 #if defined(DEBUG_SIGNAL)
953 printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
954 pc, address, is_write, *(unsigned long *)old_set);
955 #endif
956 /* XXX: locking issue */
957 if (is_write && page_unprotect(address, pc, puc)) {
958 return 1;
959 }
960 /* see if it is an MMU fault */
961 ret = cpu_m68k_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
962 if (ret < 0)
963 return 0; /* not an MMU fault */
964 if (ret == 0)
965 return 1; /* the MMU fault was handled without causing real CPU fault */
966 /* now we have a real cpu fault */
967 tb = tb_find_pc(pc);
968 if (tb) {
969 /* the PC is inside the translated code. It means that we have
970 a virtual CPU fault */
971 cpu_restore_state(tb, env, pc, puc);
972 }
973 /* we restore the process signal mask as the sigreturn should
974 do it (XXX: use sigsetjmp) */
975 sigprocmask(SIG_SETMASK, old_set, NULL);
976 cpu_loop_exit();
977 /* never comes here */
978 return 1;
979 }
980
981 #elif defined (TARGET_MIPS)
982 static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
983 int is_write, sigset_t *old_set,
984 void *puc)
985 {
986 TranslationBlock *tb;
987 int ret;
988
989 if (cpu_single_env)
990 env = cpu_single_env; /* XXX: find a correct solution for multithread */
991 #if defined(DEBUG_SIGNAL)
992 printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
993 pc, address, is_write, *(unsigned long *)old_set);
994 #endif
995 /* XXX: locking issue */
996 if (is_write && page_unprotect(h2g(address), pc, puc)) {
997 return 1;
998 }
999
1000 /* see if it is an MMU fault */
1001 ret = cpu_mips_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
1002 if (ret < 0)
1003 return 0; /* not an MMU fault */
1004 if (ret == 0)
1005 return 1; /* the MMU fault was handled without causing real CPU fault */
1006
1007 /* now we have a real cpu fault */
1008 tb = tb_find_pc(pc);
1009 if (tb) {
1010 /* the PC is inside the translated code. It means that we have
1011 a virtual CPU fault */
1012 cpu_restore_state(tb, env, pc, puc);
1013 }
1014 if (ret == 1) {
1015 #if 0
1016 printf("PF exception: PC=0x" TARGET_FMT_lx " error=0x%x %p\n",
1017 env->PC, env->error_code, tb);
1018 #endif
1019 /* we restore the process signal mask as the sigreturn should
1020 do it (XXX: use sigsetjmp) */
1021 sigprocmask(SIG_SETMASK, old_set, NULL);
1022 cpu_loop_exit();
1023 } else {
1024 /* activate soft MMU for this block */
1025 cpu_resume_from_signal(env, puc);
1026 }
1027 /* never comes here */
1028 return 1;
1029 }
1030
1031 #elif defined (TARGET_SH4)
1032 static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
1033 int is_write, sigset_t *old_set,
1034 void *puc)
1035 {
1036 TranslationBlock *tb;
1037 int ret;
1038
1039 if (cpu_single_env)
1040 env = cpu_single_env; /* XXX: find a correct solution for multithread */
1041 #if defined(DEBUG_SIGNAL)
1042 printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
1043 pc, address, is_write, *(unsigned long *)old_set);
1044 #endif
1045 /* XXX: locking issue */
1046 if (is_write && page_unprotect(h2g(address), pc, puc)) {
1047 return 1;
1048 }
1049
1050 /* see if it is an MMU fault */
1051 ret = cpu_sh4_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
1052 if (ret < 0)
1053 return 0; /* not an MMU fault */
1054 if (ret == 0)
1055 return 1; /* the MMU fault was handled without causing real CPU fault */
1056
1057 /* now we have a real cpu fault */
1058 tb = tb_find_pc(pc);
1059 if (tb) {
1060 /* the PC is inside the translated code. It means that we have
1061 a virtual CPU fault */
1062 cpu_restore_state(tb, env, pc, puc);
1063 }
1064 #if 0
1065 printf("PF exception: NIP=0x%08x error=0x%x %p\n",
1066 env->nip, env->error_code, tb);
1067 #endif
1068 /* we restore the process signal mask as the sigreturn should
1069 do it (XXX: use sigsetjmp) */
1070 sigprocmask(SIG_SETMASK, old_set, NULL);
1071 cpu_loop_exit();
1072 /* never comes here */
1073 return 1;
1074 }
1075
1076 #elif defined (TARGET_ALPHA)
1077 static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
1078 int is_write, sigset_t *old_set,
1079 void *puc)
1080 {
1081 TranslationBlock *tb;
1082 int ret;
1083
1084 if (cpu_single_env)
1085 env = cpu_single_env; /* XXX: find a correct solution for multithread */
1086 #if defined(DEBUG_SIGNAL)
1087 printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
1088 pc, address, is_write, *(unsigned long *)old_set);
1089 #endif
1090 /* XXX: locking issue */
1091 if (is_write && page_unprotect(h2g(address), pc, puc)) {
1092 return 1;
1093 }
1094
1095 /* see if it is an MMU fault */
1096 ret = cpu_alpha_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
1097 if (ret < 0)
1098 return 0; /* not an MMU fault */
1099 if (ret == 0)
1100 return 1; /* the MMU fault was handled without causing real CPU fault */
1101
1102 /* now we have a real cpu fault */
1103 tb = tb_find_pc(pc);
1104 if (tb) {
1105 /* the PC is inside the translated code. It means that we have
1106 a virtual CPU fault */
1107 cpu_restore_state(tb, env, pc, puc);
1108 }
1109 #if 0
1110 printf("PF exception: NIP=0x%08x error=0x%x %p\n",
1111 env->nip, env->error_code, tb);
1112 #endif
1113 /* we restore the process signal mask as the sigreturn should
1114 do it (XXX: use sigsetjmp) */
1115 sigprocmask(SIG_SETMASK, old_set, NULL);
1116 cpu_loop_exit();
1117 /* never comes here */
1118 return 1;
1119 }
1120 #elif defined (TARGET_CRIS)
1121 static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
1122 int is_write, sigset_t *old_set,
1123 void *puc)
1124 {
1125 TranslationBlock *tb;
1126 int ret;
1127
1128 if (cpu_single_env)
1129 env = cpu_single_env; /* XXX: find a correct solution for multithread */
1130 #if defined(DEBUG_SIGNAL)
1131 printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
1132 pc, address, is_write, *(unsigned long *)old_set);
1133 #endif
1134 /* XXX: locking issue */
1135 if (is_write && page_unprotect(h2g(address), pc, puc)) {
1136 return 1;
1137 }
1138
1139 /* see if it is an MMU fault */
1140 ret = cpu_cris_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
1141 if (ret < 0)
1142 return 0; /* not an MMU fault */
1143 if (ret == 0)
1144 return 1; /* the MMU fault was handled without causing real CPU fault */
1145
1146 /* now we have a real cpu fault */
1147 tb = tb_find_pc(pc);
1148 if (tb) {
1149 /* the PC is inside the translated code. It means that we have
1150 a virtual CPU fault */
1151 cpu_restore_state(tb, env, pc, puc);
1152 }
1153 /* we restore the process signal mask as the sigreturn should
1154 do it (XXX: use sigsetjmp) */
1155 sigprocmask(SIG_SETMASK, old_set, NULL);
1156 cpu_loop_exit();
1157 /* never comes here */
1158 return 1;
1159 }
1160
1161 #else
1162 #error unsupported target CPU
1163 #endif
1164
1165 #if defined(__i386__)
1166
1167 #if defined(__APPLE__)
1168 # include <sys/ucontext.h>
1169
1170 # define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.eip))
1171 # define TRAP_sig(context) ((context)->uc_mcontext->es.trapno)
1172 # define ERROR_sig(context) ((context)->uc_mcontext->es.err)
1173 # define MASK_sig(context) ((context)->uc_sigmask)
1174 #elif defined(__OpenBSD__)
1175 # define EIP_sig(context) ((context)->sc_eip)
1176 # define TRAP_sig(context) ((context)->sc_trapno)
1177 # define ERROR_sig(context) ((context)->sc_err)
1178 # define MASK_sig(context) ((context)->sc_mask)
1179 #else
1180 # define EIP_sig(context) ((context)->uc_mcontext.gregs[REG_EIP])
1181 # define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
1182 # define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
1183 # define MASK_sig(context) ((context)->uc_sigmask)
1184 #endif
1185
1186 int cpu_signal_handler(int host_signum, void *pinfo,
1187 void *puc)
1188 {
1189 siginfo_t *info = pinfo;
1190 #if defined(__OpenBSD__)
1191 struct sigcontext *uc = puc;
1192 #else
1193 struct ucontext *uc = puc;
1194 #endif
1195 unsigned long pc;
1196 int trapno;
1197
1198 #ifndef REG_EIP
1199 /* for glibc 2.1 */
1200 #define REG_EIP EIP
1201 #define REG_ERR ERR
1202 #define REG_TRAPNO TRAPNO
1203 #endif
1204 pc = EIP_sig(uc);
1205 trapno = TRAP_sig(uc);
1206 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1207 trapno == 0xe ?
1208 (ERROR_sig(uc) >> 1) & 1 : 0,
1209 &MASK_sig(uc), puc);
1210 }
1211
1212 #elif defined(__x86_64__)
1213
1214 #ifdef __NetBSD__
1215 #define PC_sig(context) _UC_MACHINE_PC(context)
1216 #define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
1217 #define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
1218 #define MASK_sig(context) ((context)->uc_sigmask)
1219 #elif defined(__OpenBSD__)
1220 #define PC_sig(context) ((context)->sc_rip)
1221 #define TRAP_sig(context) ((context)->sc_trapno)
1222 #define ERROR_sig(context) ((context)->sc_err)
1223 #define MASK_sig(context) ((context)->sc_mask)
1224 #else
1225 #define PC_sig(context) ((context)->uc_mcontext.gregs[REG_RIP])
1226 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
1227 #define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
1228 #define MASK_sig(context) ((context)->uc_sigmask)
1229 #endif
1230
1231 int cpu_signal_handler(int host_signum, void *pinfo,
1232 void *puc)
1233 {
1234 siginfo_t *info = pinfo;
1235 unsigned long pc;
1236 #ifdef __NetBSD__
1237 ucontext_t *uc = puc;
1238 #elif defined(__OpenBSD__)
1239 struct sigcontext *uc = puc;
1240 #else
1241 struct ucontext *uc = puc;
1242 #endif
1243
1244 pc = PC_sig(uc);
1245 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1246 TRAP_sig(uc) == 0xe ?
1247 (ERROR_sig(uc) >> 1) & 1 : 0,
1248 &MASK_sig(uc), puc);
1249 }
1250
1251 #elif defined(_ARCH_PPC)
1252
1253 /***********************************************************************
1254 * signal context platform-specific definitions
1255 * From Wine
1256 */
1257 #ifdef linux
1258 /* All Registers access - only for local access */
1259 # define REG_sig(reg_name, context) ((context)->uc_mcontext.regs->reg_name)
1260 /* Gpr Registers access */
1261 # define GPR_sig(reg_num, context) REG_sig(gpr[reg_num], context)
1262 # define IAR_sig(context) REG_sig(nip, context) /* Program counter */
1263 # define MSR_sig(context) REG_sig(msr, context) /* Machine State Register (Supervisor) */
1264 # define CTR_sig(context) REG_sig(ctr, context) /* Count register */
1265 # define XER_sig(context) REG_sig(xer, context) /* User's integer exception register */
1266 # define LR_sig(context) REG_sig(link, context) /* Link register */
1267 # define CR_sig(context) REG_sig(ccr, context) /* Condition register */
1268 /* Float Registers access */
1269 # define FLOAT_sig(reg_num, context) (((double*)((char*)((context)->uc_mcontext.regs+48*4)))[reg_num])
1270 # define FPSCR_sig(context) (*(int*)((char*)((context)->uc_mcontext.regs+(48+32*2)*4)))
1271 /* Exception Registers access */
1272 # define DAR_sig(context) REG_sig(dar, context)
1273 # define DSISR_sig(context) REG_sig(dsisr, context)
1274 # define TRAP_sig(context) REG_sig(trap, context)
1275 #endif /* linux */
1276
1277 #ifdef __APPLE__
1278 # include <sys/ucontext.h>
1279 typedef struct ucontext SIGCONTEXT;
1280 /* All Registers access - only for local access */
1281 # define REG_sig(reg_name, context) ((context)->uc_mcontext->ss.reg_name)
1282 # define FLOATREG_sig(reg_name, context) ((context)->uc_mcontext->fs.reg_name)
1283 # define EXCEPREG_sig(reg_name, context) ((context)->uc_mcontext->es.reg_name)
1284 # define VECREG_sig(reg_name, context) ((context)->uc_mcontext->vs.reg_name)
1285 /* Gpr Registers access */
1286 # define GPR_sig(reg_num, context) REG_sig(r##reg_num, context)
1287 # define IAR_sig(context) REG_sig(srr0, context) /* Program counter */
1288 # define MSR_sig(context) REG_sig(srr1, context) /* Machine State Register (Supervisor) */
1289 # define CTR_sig(context) REG_sig(ctr, context)
1290 # define XER_sig(context) REG_sig(xer, context) /* Link register */
1291 # define LR_sig(context) REG_sig(lr, context) /* User's integer exception register */
1292 # define CR_sig(context) REG_sig(cr, context) /* Condition register */
1293 /* Float Registers access */
1294 # define FLOAT_sig(reg_num, context) FLOATREG_sig(fpregs[reg_num], context)
1295 # define FPSCR_sig(context) ((double)FLOATREG_sig(fpscr, context))
1296 /* Exception Registers access */
1297 # define DAR_sig(context) EXCEPREG_sig(dar, context) /* Fault registers for coredump */
1298 # define DSISR_sig(context) EXCEPREG_sig(dsisr, context)
1299 # define TRAP_sig(context) EXCEPREG_sig(exception, context) /* number of powerpc exception taken */
1300 #endif /* __APPLE__ */
1301
1302 int cpu_signal_handler(int host_signum, void *pinfo,
1303 void *puc)
1304 {
1305 siginfo_t *info = pinfo;
1306 struct ucontext *uc = puc;
1307 unsigned long pc;
1308 int is_write;
1309
1310 pc = IAR_sig(uc);
1311 is_write = 0;
1312 #if 0
1313 /* ppc 4xx case */
1314 if (DSISR_sig(uc) & 0x00800000)
1315 is_write = 1;
1316 #else
1317 if (TRAP_sig(uc) != 0x400 && (DSISR_sig(uc) & 0x02000000))
1318 is_write = 1;
1319 #endif
1320 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1321 is_write, &uc->uc_sigmask, puc);
1322 }
1323
1324 #elif defined(__alpha__)
1325
1326 int cpu_signal_handler(int host_signum, void *pinfo,
1327 void *puc)
1328 {
1329 siginfo_t *info = pinfo;
1330 struct ucontext *uc = puc;
1331 uint32_t *pc = uc->uc_mcontext.sc_pc;
1332 uint32_t insn = *pc;
1333 int is_write = 0;
1334
1335 /* XXX: need kernel patch to get write flag faster */
1336 switch (insn >> 26) {
1337 case 0x0d: // stw
1338 case 0x0e: // stb
1339 case 0x0f: // stq_u
1340 case 0x24: // stf
1341 case 0x25: // stg
1342 case 0x26: // sts
1343 case 0x27: // stt
1344 case 0x2c: // stl
1345 case 0x2d: // stq
1346 case 0x2e: // stl_c
1347 case 0x2f: // stq_c
1348 is_write = 1;
1349 }
1350
1351 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1352 is_write, &uc->uc_sigmask, puc);
1353 }
1354 #elif defined(__sparc__)
1355
1356 int cpu_signal_handler(int host_signum, void *pinfo,
1357 void *puc)
1358 {
1359 siginfo_t *info = pinfo;
1360 int is_write;
1361 uint32_t insn;
1362 #if !defined(__arch64__) || defined(HOST_SOLARIS)
1363 uint32_t *regs = (uint32_t *)(info + 1);
1364 void *sigmask = (regs + 20);
1365 /* XXX: is there a standard glibc define ? */
1366 unsigned long pc = regs[1];
1367 #else
1368 #ifdef __linux__
1369 struct sigcontext *sc = puc;
1370 unsigned long pc = sc->sigc_regs.tpc;
1371 void *sigmask = (void *)sc->sigc_mask;
1372 #elif defined(__OpenBSD__)
1373 struct sigcontext *uc = puc;
1374 unsigned long pc = uc->sc_pc;
1375 void *sigmask = (void *)(long)uc->sc_mask;
1376 #endif
1377 #endif
1378
1379 /* XXX: need kernel patch to get write flag faster */
1380 is_write = 0;
1381 insn = *(uint32_t *)pc;
1382 if ((insn >> 30) == 3) {
1383 switch((insn >> 19) & 0x3f) {
1384 case 0x05: // stb
1385 case 0x15: // stba
1386 case 0x06: // sth
1387 case 0x16: // stha
1388 case 0x04: // st
1389 case 0x14: // sta
1390 case 0x07: // std
1391 case 0x17: // stda
1392 case 0x0e: // stx
1393 case 0x1e: // stxa
1394 case 0x24: // stf
1395 case 0x34: // stfa
1396 case 0x27: // stdf
1397 case 0x37: // stdfa
1398 case 0x26: // stqf
1399 case 0x36: // stqfa
1400 case 0x25: // stfsr
1401 case 0x3c: // casa
1402 case 0x3e: // casxa
1403 is_write = 1;
1404 break;
1405 }
1406 }
1407 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1408 is_write, sigmask, NULL);
1409 }
1410
1411 #elif defined(__arm__)
1412
1413 int cpu_signal_handler(int host_signum, void *pinfo,
1414 void *puc)
1415 {
1416 siginfo_t *info = pinfo;
1417 struct ucontext *uc = puc;
1418 unsigned long pc;
1419 int is_write;
1420
1421 #if (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ <= 3))
1422 pc = uc->uc_mcontext.gregs[R15];
1423 #else
1424 pc = uc->uc_mcontext.arm_pc;
1425 #endif
1426 /* XXX: compute is_write */
1427 is_write = 0;
1428 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1429 is_write,
1430 &uc->uc_sigmask, puc);
1431 }
1432
1433 #elif defined(__mc68000)
1434
1435 int cpu_signal_handler(int host_signum, void *pinfo,
1436 void *puc)
1437 {
1438 siginfo_t *info = pinfo;
1439 struct ucontext *uc = puc;
1440 unsigned long pc;
1441 int is_write;
1442
1443 pc = uc->uc_mcontext.gregs[16];
1444 /* XXX: compute is_write */
1445 is_write = 0;
1446 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1447 is_write,
1448 &uc->uc_sigmask, puc);
1449 }
1450
1451 #elif defined(__ia64)
1452
1453 #ifndef __ISR_VALID
1454 /* This ought to be in <bits/siginfo.h>... */
1455 # define __ISR_VALID 1
1456 #endif
1457
1458 int cpu_signal_handler(int host_signum, void *pinfo, void *puc)
1459 {
1460 siginfo_t *info = pinfo;
1461 struct ucontext *uc = puc;
1462 unsigned long ip;
1463 int is_write = 0;
1464
1465 ip = uc->uc_mcontext.sc_ip;
1466 switch (host_signum) {
1467 case SIGILL:
1468 case SIGFPE:
1469 case SIGSEGV:
1470 case SIGBUS:
1471 case SIGTRAP:
1472 if (info->si_code && (info->si_segvflags & __ISR_VALID))
1473 /* ISR.W (write-access) is bit 33: */
1474 is_write = (info->si_isr >> 33) & 1;
1475 break;
1476
1477 default:
1478 break;
1479 }
1480 return handle_cpu_signal(ip, (unsigned long)info->si_addr,
1481 is_write,
1482 &uc->uc_sigmask, puc);
1483 }
1484
1485 #elif defined(__s390__)
1486
1487 int cpu_signal_handler(int host_signum, void *pinfo,
1488 void *puc)
1489 {
1490 siginfo_t *info = pinfo;
1491 struct ucontext *uc = puc;
1492 unsigned long pc;
1493 int is_write;
1494
1495 pc = uc->uc_mcontext.psw.addr;
1496 /* XXX: compute is_write */
1497 is_write = 0;
1498 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1499 is_write, &uc->uc_sigmask, puc);
1500 }
1501
1502 #elif defined(__mips__)
1503
1504 int cpu_signal_handler(int host_signum, void *pinfo,
1505 void *puc)
1506 {
1507 siginfo_t *info = pinfo;
1508 struct ucontext *uc = puc;
1509 greg_t pc = uc->uc_mcontext.pc;
1510 int is_write;
1511
1512 /* XXX: compute is_write */
1513 is_write = 0;
1514 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1515 is_write, &uc->uc_sigmask, puc);
1516 }
1517
1518 #elif defined(__hppa__)
1519
1520 int cpu_signal_handler(int host_signum, void *pinfo,
1521 void *puc)
1522 {
1523 struct siginfo *info = pinfo;
1524 struct ucontext *uc = puc;
1525 unsigned long pc;
1526 int is_write;
1527
1528 pc = uc->uc_mcontext.sc_iaoq[0];
1529 /* FIXME: compute is_write */
1530 is_write = 0;
1531 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1532 is_write,
1533 &uc->uc_sigmask, puc);
1534 }
1535
1536 #else
1537
1538 #error host CPU specific signal handler needed
1539
1540 #endif
1541
1542 #endif /* !defined(CONFIG_SOFTMMU) */
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