2 * i386 emulator main execution loop
4 * Copyright (c) 2003-2005 Fabrice Bellard
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.
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.
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/>.
25 #if !defined(CONFIG_SOFTMMU)
37 #include <sys/ucontext.h>
41 #if defined(__sparc__) && !defined(CONFIG_SOLARIS)
42 // Work around ugly bugs in glibc that mangle global register contents
44 #define env cpu_single_env
47 int tb_invalidated_flag;
49 //#define CONFIG_DEBUG_EXEC
50 //#define DEBUG_SIGNAL
52 int qemu_cpu_has_work(CPUState *env)
54 return cpu_has_work(env);
57 void cpu_loop_exit(void)
59 env->current_tb = NULL;
60 longjmp(env->jmp_env, 1);
63 /* exit the current TB from a signal handler. The host registers are
64 restored in a state compatible with the CPU emulator
66 void cpu_resume_from_signal(CPUState *env1, void *puc)
68 #if !defined(CONFIG_SOFTMMU)
70 struct ucontext *uc = puc;
71 #elif defined(__OpenBSD__)
72 struct sigcontext *uc = puc;
78 /* XXX: restore cpu registers saved in host registers */
80 #if !defined(CONFIG_SOFTMMU)
82 /* XXX: use siglongjmp ? */
85 sigprocmask(SIG_SETMASK, (sigset_t *)&uc->uc_sigmask, NULL);
87 sigprocmask(SIG_SETMASK, &uc->uc_sigmask, NULL);
89 #elif defined(__OpenBSD__)
90 sigprocmask(SIG_SETMASK, &uc->sc_mask, NULL);
94 env->exception_index = -1;
95 longjmp(env->jmp_env, 1);
98 /* Execute the code without caching the generated code. An interpreter
99 could be used if available. */
100 static void cpu_exec_nocache(int max_cycles, TranslationBlock *orig_tb)
102 unsigned long next_tb;
103 TranslationBlock *tb;
105 /* Should never happen.
106 We only end up here when an existing TB is too long. */
107 if (max_cycles > CF_COUNT_MASK)
108 max_cycles = CF_COUNT_MASK;
110 tb = tb_gen_code(env, orig_tb->pc, orig_tb->cs_base, orig_tb->flags,
112 env->current_tb = tb;
113 /* execute the generated code */
114 next_tb = tcg_qemu_tb_exec(tb->tc_ptr);
115 env->current_tb = NULL;
117 if ((next_tb & 3) == 2) {
118 /* Restore PC. This may happen if async event occurs before
119 the TB starts executing. */
120 cpu_pc_from_tb(env, tb);
122 tb_phys_invalidate(tb, -1);
126 static TranslationBlock *tb_find_slow(target_ulong pc,
127 target_ulong cs_base,
130 TranslationBlock *tb, **ptb1;
132 tb_page_addr_t phys_pc, phys_page1, phys_page2;
133 target_ulong virt_page2;
135 tb_invalidated_flag = 0;
137 /* find translated block using physical mappings */
138 phys_pc = get_page_addr_code(env, pc);
139 phys_page1 = phys_pc & TARGET_PAGE_MASK;
141 h = tb_phys_hash_func(phys_pc);
142 ptb1 = &tb_phys_hash[h];
148 tb->page_addr[0] == phys_page1 &&
149 tb->cs_base == cs_base &&
150 tb->flags == flags) {
151 /* check next page if needed */
152 if (tb->page_addr[1] != -1) {
153 virt_page2 = (pc & TARGET_PAGE_MASK) +
155 phys_page2 = get_page_addr_code(env, virt_page2);
156 if (tb->page_addr[1] == phys_page2)
162 ptb1 = &tb->phys_hash_next;
165 /* if no translated code available, then translate it now */
166 tb = tb_gen_code(env, pc, cs_base, flags, 0);
169 /* we add the TB in the virtual pc hash table */
170 env->tb_jmp_cache[tb_jmp_cache_hash_func(pc)] = tb;
174 static inline TranslationBlock *tb_find_fast(void)
176 TranslationBlock *tb;
177 target_ulong cs_base, pc;
180 /* we record a subset of the CPU state. It will
181 always be the same before a given translated block
183 cpu_get_tb_cpu_state(env, &pc, &cs_base, &flags);
184 tb = env->tb_jmp_cache[tb_jmp_cache_hash_func(pc)];
185 if (unlikely(!tb || tb->pc != pc || tb->cs_base != cs_base ||
186 tb->flags != flags)) {
187 tb = tb_find_slow(pc, cs_base, flags);
192 static CPUDebugExcpHandler *debug_excp_handler;
194 CPUDebugExcpHandler *cpu_set_debug_excp_handler(CPUDebugExcpHandler *handler)
196 CPUDebugExcpHandler *old_handler = debug_excp_handler;
198 debug_excp_handler = handler;
202 static void cpu_handle_debug_exception(CPUState *env)
206 if (!env->watchpoint_hit)
207 QTAILQ_FOREACH(wp, &env->watchpoints, entry)
208 wp->flags &= ~BP_WATCHPOINT_HIT;
210 if (debug_excp_handler)
211 debug_excp_handler(env);
214 /* main execution loop */
216 int cpu_exec(CPUState *env1)
218 volatile host_reg_t saved_env_reg;
219 int ret, interrupt_request;
220 TranslationBlock *tb;
222 unsigned long next_tb;
224 if (cpu_halted(env1) == EXCP_HALTED)
227 cpu_single_env = env1;
229 /* the access to env below is actually saving the global register's
230 value, so that files not including target-xyz/exec.h are free to
232 QEMU_BUILD_BUG_ON (sizeof (saved_env_reg) != sizeof (env));
233 saved_env_reg = (host_reg_t) env;
237 #if defined(TARGET_I386)
238 if (!kvm_enabled()) {
239 /* put eflags in CPU temporary format */
240 CC_SRC = env->eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
241 DF = 1 - (2 * ((env->eflags >> 10) & 1));
242 CC_OP = CC_OP_EFLAGS;
243 env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
245 #elif defined(TARGET_SPARC)
246 #elif defined(TARGET_M68K)
247 env->cc_op = CC_OP_FLAGS;
248 env->cc_dest = env->sr & 0xf;
249 env->cc_x = (env->sr >> 4) & 1;
250 #elif defined(TARGET_ALPHA)
251 #elif defined(TARGET_ARM)
252 #elif defined(TARGET_PPC)
253 #elif defined(TARGET_MICROBLAZE)
254 #elif defined(TARGET_MIPS)
255 #elif defined(TARGET_SH4)
256 #elif defined(TARGET_CRIS)
257 #elif defined(TARGET_S390X)
260 #error unsupported target CPU
262 env->exception_index = -1;
264 /* prepare setjmp context for exception handling */
266 if (setjmp(env->jmp_env) == 0) {
267 #if defined(__sparc__) && !defined(CONFIG_SOLARIS)
269 env = cpu_single_env;
270 #define env cpu_single_env
272 /* if an exception is pending, we execute it here */
273 if (env->exception_index >= 0) {
274 if (env->exception_index >= EXCP_INTERRUPT) {
275 /* exit request from the cpu execution loop */
276 ret = env->exception_index;
277 if (ret == EXCP_DEBUG)
278 cpu_handle_debug_exception(env);
281 #if defined(CONFIG_USER_ONLY)
282 /* if user mode only, we simulate a fake exception
283 which will be handled outside the cpu execution
285 #if defined(TARGET_I386)
286 do_interrupt_user(env->exception_index,
287 env->exception_is_int,
289 env->exception_next_eip);
290 /* successfully delivered */
291 env->old_exception = -1;
293 ret = env->exception_index;
296 #if defined(TARGET_I386)
297 /* simulate a real cpu exception. On i386, it can
298 trigger new exceptions, but we do not handle
299 double or triple faults yet. */
300 do_interrupt(env->exception_index,
301 env->exception_is_int,
303 env->exception_next_eip, 0);
304 /* successfully delivered */
305 env->old_exception = -1;
306 #elif defined(TARGET_PPC)
308 #elif defined(TARGET_MICROBLAZE)
310 #elif defined(TARGET_MIPS)
312 #elif defined(TARGET_SPARC)
314 #elif defined(TARGET_ARM)
316 #elif defined(TARGET_SH4)
318 #elif defined(TARGET_ALPHA)
320 #elif defined(TARGET_CRIS)
322 #elif defined(TARGET_M68K)
325 env->exception_index = -1;
332 longjmp(env->jmp_env, 1);
335 next_tb = 0; /* force lookup of first TB */
337 interrupt_request = env->interrupt_request;
338 if (unlikely(interrupt_request)) {
339 if (unlikely(env->singlestep_enabled & SSTEP_NOIRQ)) {
340 /* Mask out external interrupts for this step. */
341 interrupt_request &= ~(CPU_INTERRUPT_HARD |
346 if (interrupt_request & CPU_INTERRUPT_DEBUG) {
347 env->interrupt_request &= ~CPU_INTERRUPT_DEBUG;
348 env->exception_index = EXCP_DEBUG;
351 #if defined(TARGET_ARM) || defined(TARGET_SPARC) || defined(TARGET_MIPS) || \
352 defined(TARGET_PPC) || defined(TARGET_ALPHA) || defined(TARGET_CRIS) || \
353 defined(TARGET_MICROBLAZE)
354 if (interrupt_request & CPU_INTERRUPT_HALT) {
355 env->interrupt_request &= ~CPU_INTERRUPT_HALT;
357 env->exception_index = EXCP_HLT;
361 #if defined(TARGET_I386)
362 if (interrupt_request & CPU_INTERRUPT_INIT) {
363 svm_check_intercept(SVM_EXIT_INIT);
365 env->exception_index = EXCP_HALTED;
367 } else if (interrupt_request & CPU_INTERRUPT_SIPI) {
369 } else if (env->hflags2 & HF2_GIF_MASK) {
370 if ((interrupt_request & CPU_INTERRUPT_SMI) &&
371 !(env->hflags & HF_SMM_MASK)) {
372 svm_check_intercept(SVM_EXIT_SMI);
373 env->interrupt_request &= ~CPU_INTERRUPT_SMI;
376 } else if ((interrupt_request & CPU_INTERRUPT_NMI) &&
377 !(env->hflags2 & HF2_NMI_MASK)) {
378 env->interrupt_request &= ~CPU_INTERRUPT_NMI;
379 env->hflags2 |= HF2_NMI_MASK;
380 do_interrupt(EXCP02_NMI, 0, 0, 0, 1);
382 } else if (interrupt_request & CPU_INTERRUPT_MCE) {
383 env->interrupt_request &= ~CPU_INTERRUPT_MCE;
384 do_interrupt(EXCP12_MCHK, 0, 0, 0, 0);
386 } else if ((interrupt_request & CPU_INTERRUPT_HARD) &&
387 (((env->hflags2 & HF2_VINTR_MASK) &&
388 (env->hflags2 & HF2_HIF_MASK)) ||
389 (!(env->hflags2 & HF2_VINTR_MASK) &&
390 (env->eflags & IF_MASK &&
391 !(env->hflags & HF_INHIBIT_IRQ_MASK))))) {
393 svm_check_intercept(SVM_EXIT_INTR);
394 env->interrupt_request &= ~(CPU_INTERRUPT_HARD | CPU_INTERRUPT_VIRQ);
395 intno = cpu_get_pic_interrupt(env);
396 qemu_log_mask(CPU_LOG_TB_IN_ASM, "Servicing hardware INT=0x%02x\n", intno);
397 #if defined(__sparc__) && !defined(CONFIG_SOLARIS)
399 env = cpu_single_env;
400 #define env cpu_single_env
402 do_interrupt(intno, 0, 0, 0, 1);
403 /* ensure that no TB jump will be modified as
404 the program flow was changed */
406 #if !defined(CONFIG_USER_ONLY)
407 } else if ((interrupt_request & CPU_INTERRUPT_VIRQ) &&
408 (env->eflags & IF_MASK) &&
409 !(env->hflags & HF_INHIBIT_IRQ_MASK)) {
411 /* FIXME: this should respect TPR */
412 svm_check_intercept(SVM_EXIT_VINTR);
413 intno = ldl_phys(env->vm_vmcb + offsetof(struct vmcb, control.int_vector));
414 qemu_log_mask(CPU_LOG_TB_IN_ASM, "Servicing virtual hardware INT=0x%02x\n", intno);
415 do_interrupt(intno, 0, 0, 0, 1);
416 env->interrupt_request &= ~CPU_INTERRUPT_VIRQ;
421 #elif defined(TARGET_PPC)
423 if ((interrupt_request & CPU_INTERRUPT_RESET)) {
427 if (interrupt_request & CPU_INTERRUPT_HARD) {
428 ppc_hw_interrupt(env);
429 if (env->pending_interrupts == 0)
430 env->interrupt_request &= ~CPU_INTERRUPT_HARD;
433 #elif defined(TARGET_MICROBLAZE)
434 if ((interrupt_request & CPU_INTERRUPT_HARD)
435 && (env->sregs[SR_MSR] & MSR_IE)
436 && !(env->sregs[SR_MSR] & (MSR_EIP | MSR_BIP))
437 && !(env->iflags & (D_FLAG | IMM_FLAG))) {
438 env->exception_index = EXCP_IRQ;
442 #elif defined(TARGET_MIPS)
443 if ((interrupt_request & CPU_INTERRUPT_HARD) &&
444 (env->CP0_Status & env->CP0_Cause & CP0Ca_IP_mask) &&
445 (env->CP0_Status & (1 << CP0St_IE)) &&
446 !(env->CP0_Status & (1 << CP0St_EXL)) &&
447 !(env->CP0_Status & (1 << CP0St_ERL)) &&
448 !(env->hflags & MIPS_HFLAG_DM)) {
450 env->exception_index = EXCP_EXT_INTERRUPT;
455 #elif defined(TARGET_SPARC)
456 if (interrupt_request & CPU_INTERRUPT_HARD) {
457 if (cpu_interrupts_enabled(env) &&
458 env->interrupt_index > 0) {
459 int pil = env->interrupt_index & 0xf;
460 int type = env->interrupt_index & 0xf0;
462 if (((type == TT_EXTINT) &&
463 cpu_pil_allowed(env, pil)) ||
465 env->exception_index = env->interrupt_index;
470 } else if (interrupt_request & CPU_INTERRUPT_TIMER) {
471 //do_interrupt(0, 0, 0, 0, 0);
472 env->interrupt_request &= ~CPU_INTERRUPT_TIMER;
474 #elif defined(TARGET_ARM)
475 if (interrupt_request & CPU_INTERRUPT_FIQ
476 && !(env->uncached_cpsr & CPSR_F)) {
477 env->exception_index = EXCP_FIQ;
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;
497 #elif defined(TARGET_SH4)
498 if (interrupt_request & CPU_INTERRUPT_HARD) {
502 #elif defined(TARGET_ALPHA)
503 if (interrupt_request & CPU_INTERRUPT_HARD) {
507 #elif defined(TARGET_CRIS)
508 if (interrupt_request & CPU_INTERRUPT_HARD
509 && (env->pregs[PR_CCS] & I_FLAG)
510 && !env->locked_irq) {
511 env->exception_index = EXCP_IRQ;
515 if (interrupt_request & CPU_INTERRUPT_NMI
516 && (env->pregs[PR_CCS] & M_FLAG)) {
517 env->exception_index = EXCP_NMI;
521 #elif defined(TARGET_M68K)
522 if (interrupt_request & CPU_INTERRUPT_HARD
523 && ((env->sr & SR_I) >> SR_I_SHIFT)
524 < env->pending_level) {
525 /* Real hardware gets the interrupt vector via an
526 IACK cycle at this point. Current emulated
527 hardware doesn't rely on this, so we
528 provide/save the vector when the interrupt is
530 env->exception_index = env->pending_vector;
535 /* Don't use the cached interupt_request value,
536 do_interrupt may have updated the EXITTB flag. */
537 if (env->interrupt_request & CPU_INTERRUPT_EXITTB) {
538 env->interrupt_request &= ~CPU_INTERRUPT_EXITTB;
539 /* ensure that no TB jump will be modified as
540 the program flow was changed */
544 if (unlikely(env->exit_request)) {
545 env->exit_request = 0;
546 env->exception_index = EXCP_INTERRUPT;
549 #if defined(DEBUG_DISAS) || defined(CONFIG_DEBUG_EXEC)
550 if (qemu_loglevel_mask(CPU_LOG_TB_CPU)) {
551 /* restore flags in standard format */
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_M68K)
557 cpu_m68k_flush_flags(env, env->cc_op);
558 env->cc_op = CC_OP_FLAGS;
559 env->sr = (env->sr & 0xffe0)
560 | env->cc_dest | (env->cc_x << 4);
561 log_cpu_state(env, 0);
563 log_cpu_state(env, 0);
566 #endif /* DEBUG_DISAS || CONFIG_DEBUG_EXEC */
569 /* Note: we do it here to avoid a gcc bug on Mac OS X when
570 doing it in tb_find_slow */
571 if (tb_invalidated_flag) {
572 /* as some TB could have been invalidated because
573 of memory exceptions while generating the code, we
574 must recompute the hash index here */
576 tb_invalidated_flag = 0;
578 #ifdef CONFIG_DEBUG_EXEC
579 qemu_log_mask(CPU_LOG_EXEC, "Trace 0x%08lx [" TARGET_FMT_lx "] %s\n",
580 (long)tb->tc_ptr, tb->pc,
581 lookup_symbol(tb->pc));
583 /* see if we can patch the calling TB. When the TB
584 spans two pages, we cannot safely do a direct
586 if (next_tb != 0 && tb->page_addr[1] == -1) {
587 tb_add_jump((TranslationBlock *)(next_tb & ~3), next_tb & 3, tb);
589 spin_unlock(&tb_lock);
591 /* cpu_interrupt might be called while translating the
592 TB, but before it is linked into a potentially
593 infinite loop and becomes env->current_tb. Avoid
594 starting execution if there is a pending interrupt. */
595 if (!unlikely (env->exit_request)) {
596 env->current_tb = tb;
598 /* execute the generated code */
599 #if defined(__sparc__) && !defined(CONFIG_SOLARIS)
601 env = cpu_single_env;
602 #define env cpu_single_env
604 next_tb = tcg_qemu_tb_exec(tc_ptr);
605 env->current_tb = NULL;
606 if ((next_tb & 3) == 2) {
607 /* Instruction counter expired. */
609 tb = (TranslationBlock *)(long)(next_tb & ~3);
611 cpu_pc_from_tb(env, tb);
612 insns_left = env->icount_decr.u32;
613 if (env->icount_extra && insns_left >= 0) {
614 /* Refill decrementer and continue execution. */
615 env->icount_extra += insns_left;
616 if (env->icount_extra > 0xffff) {
619 insns_left = env->icount_extra;
621 env->icount_extra -= insns_left;
622 env->icount_decr.u16.low = insns_left;
624 if (insns_left > 0) {
625 /* Execute remaining instructions. */
626 cpu_exec_nocache(insns_left, tb);
628 env->exception_index = EXCP_INTERRUPT;
634 /* reset soft MMU for next block (it can currently
635 only be set by a memory fault) */
641 #if defined(TARGET_I386)
642 /* restore flags in standard format */
643 env->eflags = env->eflags | helper_cc_compute_all(CC_OP) | (DF & DF_MASK);
644 #elif defined(TARGET_ARM)
645 /* XXX: Save/restore host fpu exception state?. */
646 #elif defined(TARGET_SPARC)
647 #elif defined(TARGET_PPC)
648 #elif defined(TARGET_M68K)
649 cpu_m68k_flush_flags(env, env->cc_op);
650 env->cc_op = CC_OP_FLAGS;
651 env->sr = (env->sr & 0xffe0)
652 | env->cc_dest | (env->cc_x << 4);
653 #elif defined(TARGET_MICROBLAZE)
654 #elif defined(TARGET_MIPS)
655 #elif defined(TARGET_SH4)
656 #elif defined(TARGET_ALPHA)
657 #elif defined(TARGET_CRIS)
658 #elif defined(TARGET_S390X)
661 #error unsupported target CPU
664 /* restore global registers */
666 env = (void *) saved_env_reg;
668 /* fail safe : never use cpu_single_env outside cpu_exec() */
669 cpu_single_env = NULL;
673 /* must only be called from the generated code as an exception can be
675 void tb_invalidate_page_range(target_ulong start, target_ulong end)
677 /* XXX: cannot enable it yet because it yields to MMU exception
678 where NIP != read address on PowerPC */
680 target_ulong phys_addr;
681 phys_addr = get_phys_addr_code(env, start);
682 tb_invalidate_phys_page_range(phys_addr, phys_addr + end - start, 0);
686 #if defined(TARGET_I386) && defined(CONFIG_USER_ONLY)
688 void cpu_x86_load_seg(CPUX86State *s, int seg_reg, int selector)
690 CPUX86State *saved_env;
694 if (!(env->cr[0] & CR0_PE_MASK) || (env->eflags & VM_MASK)) {
696 cpu_x86_load_seg_cache(env, seg_reg, selector,
697 (selector << 4), 0xffff, 0);
699 helper_load_seg(seg_reg, selector);
704 void cpu_x86_fsave(CPUX86State *s, target_ulong ptr, int data32)
706 CPUX86State *saved_env;
711 helper_fsave(ptr, data32);
716 void cpu_x86_frstor(CPUX86State *s, target_ulong ptr, int data32)
718 CPUX86State *saved_env;
723 helper_frstor(ptr, data32);
728 #endif /* TARGET_I386 */
730 #if !defined(CONFIG_SOFTMMU)
732 #if defined(TARGET_I386)
733 #define EXCEPTION_ACTION raise_exception_err(env->exception_index, env->error_code)
735 #define EXCEPTION_ACTION cpu_loop_exit()
738 /* 'pc' is the host PC at which the exception was raised. 'address' is
739 the effective address of the memory exception. 'is_write' is 1 if a
740 write caused the exception and otherwise 0'. 'old_set' is the
741 signal set which should be restored */
742 static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
743 int is_write, sigset_t *old_set,
746 TranslationBlock *tb;
750 env = cpu_single_env; /* XXX: find a correct solution for multithread */
751 #if defined(DEBUG_SIGNAL)
752 qemu_printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
753 pc, address, is_write, *(unsigned long *)old_set);
755 /* XXX: locking issue */
756 if (is_write && page_unprotect(h2g(address), pc, puc)) {
760 /* see if it is an MMU fault */
761 ret = cpu_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
763 return 0; /* not an MMU fault */
765 return 1; /* the MMU fault was handled without causing real CPU fault */
766 /* now we have a real cpu fault */
769 /* the PC is inside the translated code. It means that we have
770 a virtual CPU fault */
771 cpu_restore_state(tb, env, pc, puc);
774 /* we restore the process signal mask as the sigreturn should
775 do it (XXX: use sigsetjmp) */
776 sigprocmask(SIG_SETMASK, old_set, NULL);
779 /* never comes here */
783 #if defined(__i386__)
785 #if defined(__APPLE__)
786 # include <sys/ucontext.h>
788 # define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.eip))
789 # define TRAP_sig(context) ((context)->uc_mcontext->es.trapno)
790 # define ERROR_sig(context) ((context)->uc_mcontext->es.err)
791 # define MASK_sig(context) ((context)->uc_sigmask)
792 #elif defined (__NetBSD__)
793 # include <ucontext.h>
795 # define EIP_sig(context) ((context)->uc_mcontext.__gregs[_REG_EIP])
796 # define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
797 # define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
798 # define MASK_sig(context) ((context)->uc_sigmask)
799 #elif defined (__FreeBSD__) || defined(__DragonFly__)
800 # include <ucontext.h>
802 # define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext.mc_eip))
803 # define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno)
804 # define ERROR_sig(context) ((context)->uc_mcontext.mc_err)
805 # define MASK_sig(context) ((context)->uc_sigmask)
806 #elif defined(__OpenBSD__)
807 # define EIP_sig(context) ((context)->sc_eip)
808 # define TRAP_sig(context) ((context)->sc_trapno)
809 # define ERROR_sig(context) ((context)->sc_err)
810 # define MASK_sig(context) ((context)->sc_mask)
812 # define EIP_sig(context) ((context)->uc_mcontext.gregs[REG_EIP])
813 # define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
814 # define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
815 # define MASK_sig(context) ((context)->uc_sigmask)
818 int cpu_signal_handler(int host_signum, void *pinfo,
821 siginfo_t *info = pinfo;
822 #if defined(__NetBSD__) || defined (__FreeBSD__) || defined(__DragonFly__)
823 ucontext_t *uc = puc;
824 #elif defined(__OpenBSD__)
825 struct sigcontext *uc = puc;
827 struct ucontext *uc = puc;
836 #define REG_TRAPNO TRAPNO
839 trapno = TRAP_sig(uc);
840 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
842 (ERROR_sig(uc) >> 1) & 1 : 0,
846 #elif defined(__x86_64__)
849 #define PC_sig(context) _UC_MACHINE_PC(context)
850 #define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
851 #define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
852 #define MASK_sig(context) ((context)->uc_sigmask)
853 #elif defined(__OpenBSD__)
854 #define PC_sig(context) ((context)->sc_rip)
855 #define TRAP_sig(context) ((context)->sc_trapno)
856 #define ERROR_sig(context) ((context)->sc_err)
857 #define MASK_sig(context) ((context)->sc_mask)
858 #elif defined (__FreeBSD__) || defined(__DragonFly__)
859 #include <ucontext.h>
861 #define PC_sig(context) (*((unsigned long*)&(context)->uc_mcontext.mc_rip))
862 #define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno)
863 #define ERROR_sig(context) ((context)->uc_mcontext.mc_err)
864 #define MASK_sig(context) ((context)->uc_sigmask)
866 #define PC_sig(context) ((context)->uc_mcontext.gregs[REG_RIP])
867 #define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
868 #define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
869 #define MASK_sig(context) ((context)->uc_sigmask)
872 int cpu_signal_handler(int host_signum, void *pinfo,
875 siginfo_t *info = pinfo;
877 #if defined(__NetBSD__) || defined (__FreeBSD__) || defined(__DragonFly__)
878 ucontext_t *uc = puc;
879 #elif defined(__OpenBSD__)
880 struct sigcontext *uc = puc;
882 struct ucontext *uc = puc;
886 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
887 TRAP_sig(uc) == 0xe ?
888 (ERROR_sig(uc) >> 1) & 1 : 0,
892 #elif defined(_ARCH_PPC)
894 /***********************************************************************
895 * signal context platform-specific definitions
899 /* All Registers access - only for local access */
900 # define REG_sig(reg_name, context) ((context)->uc_mcontext.regs->reg_name)
901 /* Gpr Registers access */
902 # define GPR_sig(reg_num, context) REG_sig(gpr[reg_num], context)
903 # define IAR_sig(context) REG_sig(nip, context) /* Program counter */
904 # define MSR_sig(context) REG_sig(msr, context) /* Machine State Register (Supervisor) */
905 # define CTR_sig(context) REG_sig(ctr, context) /* Count register */
906 # define XER_sig(context) REG_sig(xer, context) /* User's integer exception register */
907 # define LR_sig(context) REG_sig(link, context) /* Link register */
908 # define CR_sig(context) REG_sig(ccr, context) /* Condition register */
909 /* Float Registers access */
910 # define FLOAT_sig(reg_num, context) (((double*)((char*)((context)->uc_mcontext.regs+48*4)))[reg_num])
911 # define FPSCR_sig(context) (*(int*)((char*)((context)->uc_mcontext.regs+(48+32*2)*4)))
912 /* Exception Registers access */
913 # define DAR_sig(context) REG_sig(dar, context)
914 # define DSISR_sig(context) REG_sig(dsisr, context)
915 # define TRAP_sig(context) REG_sig(trap, context)
918 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
919 #include <ucontext.h>
920 # define IAR_sig(context) ((context)->uc_mcontext.mc_srr0)
921 # define MSR_sig(context) ((context)->uc_mcontext.mc_srr1)
922 # define CTR_sig(context) ((context)->uc_mcontext.mc_ctr)
923 # define XER_sig(context) ((context)->uc_mcontext.mc_xer)
924 # define LR_sig(context) ((context)->uc_mcontext.mc_lr)
925 # define CR_sig(context) ((context)->uc_mcontext.mc_cr)
926 /* Exception Registers access */
927 # define DAR_sig(context) ((context)->uc_mcontext.mc_dar)
928 # define DSISR_sig(context) ((context)->uc_mcontext.mc_dsisr)
929 # define TRAP_sig(context) ((context)->uc_mcontext.mc_exc)
930 #endif /* __FreeBSD__|| __FreeBSD_kernel__ */
933 # include <sys/ucontext.h>
934 typedef struct ucontext SIGCONTEXT;
935 /* All Registers access - only for local access */
936 # define REG_sig(reg_name, context) ((context)->uc_mcontext->ss.reg_name)
937 # define FLOATREG_sig(reg_name, context) ((context)->uc_mcontext->fs.reg_name)
938 # define EXCEPREG_sig(reg_name, context) ((context)->uc_mcontext->es.reg_name)
939 # define VECREG_sig(reg_name, context) ((context)->uc_mcontext->vs.reg_name)
940 /* Gpr Registers access */
941 # define GPR_sig(reg_num, context) REG_sig(r##reg_num, context)
942 # define IAR_sig(context) REG_sig(srr0, context) /* Program counter */
943 # define MSR_sig(context) REG_sig(srr1, context) /* Machine State Register (Supervisor) */
944 # define CTR_sig(context) REG_sig(ctr, context)
945 # define XER_sig(context) REG_sig(xer, context) /* Link register */
946 # define LR_sig(context) REG_sig(lr, context) /* User's integer exception register */
947 # define CR_sig(context) REG_sig(cr, context) /* Condition register */
948 /* Float Registers access */
949 # define FLOAT_sig(reg_num, context) FLOATREG_sig(fpregs[reg_num], context)
950 # define FPSCR_sig(context) ((double)FLOATREG_sig(fpscr, context))
951 /* Exception Registers access */
952 # define DAR_sig(context) EXCEPREG_sig(dar, context) /* Fault registers for coredump */
953 # define DSISR_sig(context) EXCEPREG_sig(dsisr, context)
954 # define TRAP_sig(context) EXCEPREG_sig(exception, context) /* number of powerpc exception taken */
955 #endif /* __APPLE__ */
957 int cpu_signal_handler(int host_signum, void *pinfo,
960 siginfo_t *info = pinfo;
961 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
962 ucontext_t *uc = puc;
964 struct ucontext *uc = puc;
973 if (DSISR_sig(uc) & 0x00800000)
976 if (TRAP_sig(uc) != 0x400 && (DSISR_sig(uc) & 0x02000000))
979 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
980 is_write, &uc->uc_sigmask, puc);
983 #elif defined(__alpha__)
985 int cpu_signal_handler(int host_signum, void *pinfo,
988 siginfo_t *info = pinfo;
989 struct ucontext *uc = puc;
990 uint32_t *pc = uc->uc_mcontext.sc_pc;
994 /* XXX: need kernel patch to get write flag faster */
995 switch (insn >> 26) {
1010 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1011 is_write, &uc->uc_sigmask, puc);
1013 #elif defined(__sparc__)
1015 int cpu_signal_handler(int host_signum, void *pinfo,
1018 siginfo_t *info = pinfo;
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];
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;
1038 /* XXX: need kernel patch to get write flag faster */
1040 insn = *(uint32_t *)pc;
1041 if ((insn >> 30) == 3) {
1042 switch((insn >> 19) & 0x3f) {
1066 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1067 is_write, sigmask, NULL);
1070 #elif defined(__arm__)
1072 int cpu_signal_handler(int host_signum, void *pinfo,
1075 siginfo_t *info = pinfo;
1076 struct ucontext *uc = puc;
1080 #if (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ <= 3))
1081 pc = uc->uc_mcontext.gregs[R15];
1083 pc = uc->uc_mcontext.arm_pc;
1085 /* XXX: compute is_write */
1087 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1089 &uc->uc_sigmask, puc);
1092 #elif defined(__mc68000)
1094 int cpu_signal_handler(int host_signum, void *pinfo,
1097 siginfo_t *info = pinfo;
1098 struct ucontext *uc = puc;
1102 pc = uc->uc_mcontext.gregs[16];
1103 /* XXX: compute is_write */
1105 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1107 &uc->uc_sigmask, puc);
1110 #elif defined(__ia64)
1113 /* This ought to be in <bits/siginfo.h>... */
1114 # define __ISR_VALID 1
1117 int cpu_signal_handler(int host_signum, void *pinfo, void *puc)
1119 siginfo_t *info = pinfo;
1120 struct ucontext *uc = puc;
1124 ip = uc->uc_mcontext.sc_ip;
1125 switch (host_signum) {
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;
1139 return handle_cpu_signal(ip, (unsigned long)info->si_addr,
1141 (sigset_t *)&uc->uc_sigmask, puc);
1144 #elif defined(__s390__)
1146 int cpu_signal_handler(int host_signum, void *pinfo,
1149 siginfo_t *info = pinfo;
1150 struct ucontext *uc = puc;
1154 pc = uc->uc_mcontext.psw.addr;
1155 /* XXX: compute is_write */
1157 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1158 is_write, &uc->uc_sigmask, puc);
1161 #elif defined(__mips__)
1163 int cpu_signal_handler(int host_signum, void *pinfo,
1166 siginfo_t *info = pinfo;
1167 struct ucontext *uc = puc;
1168 greg_t pc = uc->uc_mcontext.pc;
1171 /* XXX: compute is_write */
1173 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1174 is_write, &uc->uc_sigmask, puc);
1177 #elif defined(__hppa__)
1179 int cpu_signal_handler(int host_signum, void *pinfo,
1182 struct siginfo *info = pinfo;
1183 struct ucontext *uc = puc;
1184 unsigned long pc = uc->uc_mcontext.sc_iaoq[0];
1185 uint32_t insn = *(uint32_t *)pc;
1188 /* XXX: need kernel patch to get write flag faster. */
1189 switch (insn >> 26) {
1190 case 0x1a: /* STW */
1191 case 0x19: /* STH */
1192 case 0x18: /* STB */
1193 case 0x1b: /* STWM */
1197 case 0x09: /* CSTWX, FSTWX, FSTWS */
1198 case 0x0b: /* CSTDX, FSTDX, FSTDS */
1199 /* Distinguish from coprocessor load ... */
1200 is_write = (insn >> 9) & 1;
1204 switch ((insn >> 6) & 15) {
1205 case 0xa: /* STWS */
1206 case 0x9: /* STHS */
1207 case 0x8: /* STBS */
1208 case 0xe: /* STWAS */
1209 case 0xc: /* STBYS */
1215 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1216 is_write, &uc->uc_sigmask, puc);
1221 #error host CPU specific signal handler needed
1225 #endif /* !defined(CONFIG_SOFTMMU) */