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, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #if !defined(CONFIG_SOFTMMU)
35 #include <sys/ucontext.h>
38 int tb_invalidated_flag;
41 //#define DEBUG_SIGNAL
43 void cpu_loop_exit(void)
45 /* NOTE: the register at this point must be saved by hand because
46 longjmp restore them */
48 longjmp(env->jmp_env, 1);
51 #if !(defined(TARGET_SPARC) || defined(TARGET_SH4) || defined(TARGET_M68K))
55 /* exit the current TB from a signal handler. The host registers are
56 restored in a state compatible with the CPU emulator
58 void cpu_resume_from_signal(CPUState *env1, void *puc)
60 #if !defined(CONFIG_SOFTMMU)
61 struct ucontext *uc = puc;
66 /* XXX: restore cpu registers saved in host registers */
68 #if !defined(CONFIG_SOFTMMU)
70 /* XXX: use siglongjmp ? */
71 sigprocmask(SIG_SETMASK, &uc->uc_sigmask, NULL);
74 longjmp(env->jmp_env, 1);
78 static TranslationBlock *tb_find_slow(target_ulong pc,
82 TranslationBlock *tb, **ptb1;
85 target_ulong phys_pc, phys_page1, phys_page2, virt_page2;
90 tb_invalidated_flag = 0;
92 regs_to_env(); /* XXX: do it just before cpu_gen_code() */
94 /* find translated block using physical mappings */
95 phys_pc = get_phys_addr_code(env, pc);
96 phys_page1 = phys_pc & TARGET_PAGE_MASK;
98 h = tb_phys_hash_func(phys_pc);
99 ptb1 = &tb_phys_hash[h];
105 tb->page_addr[0] == phys_page1 &&
106 tb->cs_base == cs_base &&
107 tb->flags == flags) {
108 /* check next page if needed */
109 if (tb->page_addr[1] != -1) {
110 virt_page2 = (pc & TARGET_PAGE_MASK) +
112 phys_page2 = get_phys_addr_code(env, virt_page2);
113 if (tb->page_addr[1] == phys_page2)
119 ptb1 = &tb->phys_hash_next;
122 /* if no translated code available, then translate it now */
125 /* flush must be done */
127 /* cannot fail at this point */
129 /* don't forget to invalidate previous TB info */
130 tb_invalidated_flag = 1;
132 tc_ptr = code_gen_ptr;
134 tb->cs_base = cs_base;
136 cpu_gen_code(env, tb, CODE_GEN_MAX_SIZE, &code_gen_size);
137 code_gen_ptr = (void *)(((unsigned long)code_gen_ptr + code_gen_size + CODE_GEN_ALIGN - 1) & ~(CODE_GEN_ALIGN - 1));
139 /* check next page if needed */
140 virt_page2 = (pc + tb->size - 1) & TARGET_PAGE_MASK;
142 if ((pc & TARGET_PAGE_MASK) != virt_page2) {
143 phys_page2 = get_phys_addr_code(env, virt_page2);
145 tb_link_phys(tb, phys_pc, phys_page2);
148 /* we add the TB in the virtual pc hash table */
149 env->tb_jmp_cache[tb_jmp_cache_hash_func(pc)] = tb;
150 spin_unlock(&tb_lock);
154 static inline TranslationBlock *tb_find_fast(void)
156 TranslationBlock *tb;
157 target_ulong cs_base, pc;
160 /* we record a subset of the CPU state. It will
161 always be the same before a given translated block
163 #if defined(TARGET_I386)
165 flags |= (env->eflags & (IOPL_MASK | TF_MASK | VM_MASK));
166 flags |= env->intercept;
167 cs_base = env->segs[R_CS].base;
168 pc = cs_base + env->eip;
169 #elif defined(TARGET_ARM)
170 flags = env->thumb | (env->vfp.vec_len << 1)
171 | (env->vfp.vec_stride << 4);
172 if ((env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR)
174 if (env->vfp.xregs[ARM_VFP_FPEXC] & (1 << 30))
178 #elif defined(TARGET_SPARC)
179 #ifdef TARGET_SPARC64
180 // Combined FPU enable bits . PRIV . DMMU enabled . IMMU enabled
181 flags = (((env->pstate & PS_PEF) >> 1) | ((env->fprs & FPRS_FEF) << 2))
182 | (env->pstate & PS_PRIV) | ((env->lsu & (DMMU_E | IMMU_E)) >> 2);
184 // FPU enable . MMU enabled . MMU no-fault . Supervisor
185 flags = (env->psref << 3) | ((env->mmuregs[0] & (MMU_E | MMU_NF)) << 1)
190 #elif defined(TARGET_PPC)
194 #elif defined(TARGET_MIPS)
195 flags = env->hflags & (MIPS_HFLAG_TMASK | MIPS_HFLAG_BMASK);
197 pc = env->PC[env->current_tc];
198 #elif defined(TARGET_M68K)
199 flags = (env->fpcr & M68K_FPCR_PREC) /* Bit 6 */
200 | (env->sr & SR_S) /* Bit 13 */
201 | ((env->macsr >> 4) & 0xf); /* Bits 0-3 */
204 #elif defined(TARGET_SH4)
205 flags = env->sr & (SR_MD | SR_RB);
206 cs_base = 0; /* XXXXX */
208 #elif defined(TARGET_ALPHA)
213 #error unsupported CPU
215 tb = env->tb_jmp_cache[tb_jmp_cache_hash_func(pc)];
216 if (__builtin_expect(!tb || tb->pc != pc || tb->cs_base != cs_base ||
217 tb->flags != flags, 0)) {
218 tb = tb_find_slow(pc, cs_base, flags);
219 /* Note: we do it here to avoid a gcc bug on Mac OS X when
220 doing it in tb_find_slow */
221 if (tb_invalidated_flag) {
222 /* as some TB could have been invalidated because
223 of memory exceptions while generating the code, we
224 must recompute the hash index here */
232 /* main execution loop */
234 int cpu_exec(CPUState *env1)
236 #define DECLARE_HOST_REGS 1
237 #include "hostregs_helper.h"
238 #if defined(TARGET_SPARC)
239 #if defined(reg_REGWPTR)
240 uint32_t *saved_regwptr;
243 #if defined(__sparc__) && !defined(HOST_SOLARIS)
247 int ret, interrupt_request;
248 void (*gen_func)(void);
249 TranslationBlock *tb;
252 if (cpu_halted(env1) == EXCP_HALTED)
255 cpu_single_env = env1;
257 /* first we save global registers */
258 #define SAVE_HOST_REGS 1
259 #include "hostregs_helper.h"
261 #if defined(__sparc__) && !defined(HOST_SOLARIS)
262 /* we also save i7 because longjmp may not restore it */
263 asm volatile ("mov %%i7, %0" : "=r" (saved_i7));
267 #if defined(TARGET_I386)
268 /* put eflags in CPU temporary format */
269 CC_SRC = env->eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
270 DF = 1 - (2 * ((env->eflags >> 10) & 1));
271 CC_OP = CC_OP_EFLAGS;
272 env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
273 #elif defined(TARGET_SPARC)
274 #if defined(reg_REGWPTR)
275 saved_regwptr = REGWPTR;
277 #elif defined(TARGET_M68K)
278 env->cc_op = CC_OP_FLAGS;
279 env->cc_dest = env->sr & 0xf;
280 env->cc_x = (env->sr >> 4) & 1;
281 #elif defined(TARGET_ALPHA)
282 #elif defined(TARGET_ARM)
283 #elif defined(TARGET_PPC)
284 #elif defined(TARGET_MIPS)
285 #elif defined(TARGET_SH4)
288 #error unsupported target CPU
290 env->exception_index = -1;
292 /* prepare setjmp context for exception handling */
294 if (setjmp(env->jmp_env) == 0) {
295 env->current_tb = NULL;
296 /* if an exception is pending, we execute it here */
297 if (env->exception_index >= 0) {
298 if (env->exception_index >= EXCP_INTERRUPT) {
299 /* exit request from the cpu execution loop */
300 ret = env->exception_index;
302 } else if (env->user_mode_only) {
303 /* if user mode only, we simulate a fake exception
304 which will be handled outside the cpu execution
306 #if defined(TARGET_I386)
307 do_interrupt_user(env->exception_index,
308 env->exception_is_int,
310 env->exception_next_eip);
312 ret = env->exception_index;
315 #if defined(TARGET_I386)
316 /* simulate a real cpu exception. On i386, it can
317 trigger new exceptions, but we do not handle
318 double or triple faults yet. */
319 do_interrupt(env->exception_index,
320 env->exception_is_int,
322 env->exception_next_eip, 0);
323 /* successfully delivered */
324 env->old_exception = -1;
325 #elif defined(TARGET_PPC)
327 #elif defined(TARGET_MIPS)
329 #elif defined(TARGET_SPARC)
330 do_interrupt(env->exception_index);
331 #elif defined(TARGET_ARM)
333 #elif defined(TARGET_SH4)
335 #elif defined(TARGET_ALPHA)
337 #elif defined(TARGET_M68K)
341 env->exception_index = -1;
344 if (kqemu_is_ok(env) && env->interrupt_request == 0) {
346 env->eflags = env->eflags | cc_table[CC_OP].compute_all() | (DF & DF_MASK);
347 ret = kqemu_cpu_exec(env);
348 /* put eflags in CPU temporary format */
349 CC_SRC = env->eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
350 DF = 1 - (2 * ((env->eflags >> 10) & 1));
351 CC_OP = CC_OP_EFLAGS;
352 env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
355 longjmp(env->jmp_env, 1);
356 } else if (ret == 2) {
357 /* softmmu execution needed */
359 if (env->interrupt_request != 0) {
360 /* hardware interrupt will be executed just after */
362 /* otherwise, we restart */
363 longjmp(env->jmp_env, 1);
369 T0 = 0; /* force lookup of first TB */
371 #if defined(__sparc__) && !defined(HOST_SOLARIS)
372 /* g1 can be modified by some libc? functions */
375 interrupt_request = env->interrupt_request;
376 if (__builtin_expect(interrupt_request, 0)
377 #if defined(TARGET_I386)
378 && env->hflags & HF_GIF_MASK
381 if (interrupt_request & CPU_INTERRUPT_DEBUG) {
382 env->interrupt_request &= ~CPU_INTERRUPT_DEBUG;
383 env->exception_index = EXCP_DEBUG;
386 #if defined(TARGET_ARM) || defined(TARGET_SPARC) || defined(TARGET_MIPS) || \
387 defined(TARGET_PPC) || defined(TARGET_ALPHA)
388 if (interrupt_request & CPU_INTERRUPT_HALT) {
389 env->interrupt_request &= ~CPU_INTERRUPT_HALT;
391 env->exception_index = EXCP_HLT;
395 #if defined(TARGET_I386)
396 if ((interrupt_request & CPU_INTERRUPT_SMI) &&
397 !(env->hflags & HF_SMM_MASK)) {
398 svm_check_intercept(SVM_EXIT_SMI);
399 env->interrupt_request &= ~CPU_INTERRUPT_SMI;
401 #if defined(__sparc__) && !defined(HOST_SOLARIS)
406 } else if ((interrupt_request & CPU_INTERRUPT_HARD) &&
407 (env->eflags & IF_MASK || env->hflags & HF_HIF_MASK) &&
408 !(env->hflags & HF_INHIBIT_IRQ_MASK)) {
410 svm_check_intercept(SVM_EXIT_INTR);
411 env->interrupt_request &= ~CPU_INTERRUPT_HARD;
412 intno = cpu_get_pic_interrupt(env);
413 if (loglevel & CPU_LOG_TB_IN_ASM) {
414 fprintf(logfile, "Servicing hardware INT=0x%02x\n", intno);
416 do_interrupt(intno, 0, 0, 0, 1);
417 /* ensure that no TB jump will be modified as
418 the program flow was changed */
419 #if defined(__sparc__) && !defined(HOST_SOLARIS)
424 #if !defined(CONFIG_USER_ONLY)
425 } else if ((interrupt_request & CPU_INTERRUPT_VIRQ) &&
426 (env->eflags & IF_MASK) && !(env->hflags & HF_INHIBIT_IRQ_MASK)) {
428 /* FIXME: this should respect TPR */
429 env->interrupt_request &= ~CPU_INTERRUPT_VIRQ;
430 stl_phys(env->vm_vmcb + offsetof(struct vmcb, control.int_ctl),
431 ldl_phys(env->vm_vmcb + offsetof(struct vmcb, control.int_ctl)) & ~V_IRQ_MASK);
432 intno = ldl_phys(env->vm_vmcb + offsetof(struct vmcb, control.int_vector));
433 if (loglevel & CPU_LOG_TB_IN_ASM)
434 fprintf(logfile, "Servicing virtual hardware INT=0x%02x\n", intno);
435 do_interrupt(intno, 0, 0, -1, 1);
436 #if defined(__sparc__) && !defined(HOST_SOLARIS)
443 #elif defined(TARGET_PPC)
445 if ((interrupt_request & CPU_INTERRUPT_RESET)) {
449 if (interrupt_request & CPU_INTERRUPT_HARD) {
450 ppc_hw_interrupt(env);
451 if (env->pending_interrupts == 0)
452 env->interrupt_request &= ~CPU_INTERRUPT_HARD;
453 #if defined(__sparc__) && !defined(HOST_SOLARIS)
459 #elif defined(TARGET_MIPS)
460 if ((interrupt_request & CPU_INTERRUPT_HARD) &&
461 (env->CP0_Status & env->CP0_Cause & CP0Ca_IP_mask) &&
462 (env->CP0_Status & (1 << CP0St_IE)) &&
463 !(env->CP0_Status & (1 << CP0St_EXL)) &&
464 !(env->CP0_Status & (1 << CP0St_ERL)) &&
465 !(env->hflags & MIPS_HFLAG_DM)) {
467 env->exception_index = EXCP_EXT_INTERRUPT;
470 #if defined(__sparc__) && !defined(HOST_SOLARIS)
476 #elif defined(TARGET_SPARC)
477 if ((interrupt_request & CPU_INTERRUPT_HARD) &&
479 int pil = env->interrupt_index & 15;
480 int type = env->interrupt_index & 0xf0;
482 if (((type == TT_EXTINT) &&
483 (pil == 15 || pil > env->psrpil)) ||
485 env->interrupt_request &= ~CPU_INTERRUPT_HARD;
486 do_interrupt(env->interrupt_index);
487 env->interrupt_index = 0;
488 #if !defined(TARGET_SPARC64) && !defined(CONFIG_USER_ONLY)
491 #if defined(__sparc__) && !defined(HOST_SOLARIS)
497 } else if (interrupt_request & CPU_INTERRUPT_TIMER) {
498 //do_interrupt(0, 0, 0, 0, 0);
499 env->interrupt_request &= ~CPU_INTERRUPT_TIMER;
501 #elif defined(TARGET_ARM)
502 if (interrupt_request & CPU_INTERRUPT_FIQ
503 && !(env->uncached_cpsr & CPSR_F)) {
504 env->exception_index = EXCP_FIQ;
507 if (interrupt_request & CPU_INTERRUPT_HARD
508 && !(env->uncached_cpsr & CPSR_I)) {
509 env->exception_index = EXCP_IRQ;
512 #elif defined(TARGET_SH4)
514 #elif defined(TARGET_ALPHA)
515 if (interrupt_request & CPU_INTERRUPT_HARD) {
518 #elif defined(TARGET_M68K)
519 if (interrupt_request & CPU_INTERRUPT_HARD
520 && ((env->sr & SR_I) >> SR_I_SHIFT)
521 < env->pending_level) {
522 /* Real hardware gets the interrupt vector via an
523 IACK cycle at this point. Current emulated
524 hardware doesn't rely on this, so we
525 provide/save the vector when the interrupt is
527 env->exception_index = env->pending_vector;
531 /* Don't use the cached interupt_request value,
532 do_interrupt may have updated the EXITTB flag. */
533 if (env->interrupt_request & CPU_INTERRUPT_EXITTB) {
534 env->interrupt_request &= ~CPU_INTERRUPT_EXITTB;
535 /* ensure that no TB jump will be modified as
536 the program flow was changed */
537 #if defined(__sparc__) && !defined(HOST_SOLARIS)
543 if (interrupt_request & CPU_INTERRUPT_EXIT) {
544 env->interrupt_request &= ~CPU_INTERRUPT_EXIT;
545 env->exception_index = EXCP_INTERRUPT;
550 if ((loglevel & CPU_LOG_TB_CPU)) {
551 /* restore flags in standard format */
553 #if defined(TARGET_I386)
554 env->eflags = env->eflags | cc_table[CC_OP].compute_all() | (DF & DF_MASK);
555 cpu_dump_state(env, logfile, fprintf, X86_DUMP_CCOP);
556 env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
557 #elif defined(TARGET_ARM)
558 cpu_dump_state(env, logfile, fprintf, 0);
559 #elif defined(TARGET_SPARC)
560 REGWPTR = env->regbase + (env->cwp * 16);
561 env->regwptr = REGWPTR;
562 cpu_dump_state(env, logfile, fprintf, 0);
563 #elif defined(TARGET_PPC)
564 cpu_dump_state(env, logfile, fprintf, 0);
565 #elif defined(TARGET_M68K)
566 cpu_m68k_flush_flags(env, env->cc_op);
567 env->cc_op = CC_OP_FLAGS;
568 env->sr = (env->sr & 0xffe0)
569 | env->cc_dest | (env->cc_x << 4);
570 cpu_dump_state(env, logfile, fprintf, 0);
571 #elif defined(TARGET_MIPS)
572 cpu_dump_state(env, logfile, fprintf, 0);
573 #elif defined(TARGET_SH4)
574 cpu_dump_state(env, logfile, fprintf, 0);
575 #elif defined(TARGET_ALPHA)
576 cpu_dump_state(env, logfile, fprintf, 0);
578 #error unsupported target CPU
584 if ((loglevel & CPU_LOG_EXEC)) {
585 fprintf(logfile, "Trace 0x%08lx [" TARGET_FMT_lx "] %s\n",
586 (long)tb->tc_ptr, tb->pc,
587 lookup_symbol(tb->pc));
590 #if defined(__sparc__) && !defined(HOST_SOLARIS)
593 /* see if we can patch the calling TB. When the TB
594 spans two pages, we cannot safely do a direct
599 (env->kqemu_enabled != 2) &&
601 tb->page_addr[1] == -1
602 #if defined(TARGET_I386) && defined(USE_CODE_COPY)
603 && (tb->cflags & CF_CODE_COPY) ==
604 (((TranslationBlock *)(T0 & ~3))->cflags & CF_CODE_COPY)
608 tb_add_jump((TranslationBlock *)(long)(T0 & ~3), T0 & 3, tb);
609 #if defined(USE_CODE_COPY)
610 /* propagates the FP use info */
611 ((TranslationBlock *)(T0 & ~3))->cflags |=
612 (tb->cflags & CF_FP_USED);
614 spin_unlock(&tb_lock);
618 env->current_tb = tb;
619 /* execute the generated code */
620 gen_func = (void *)tc_ptr;
621 #if defined(__sparc__)
622 __asm__ __volatile__("call %0\n\t"
626 : "i0", "i1", "i2", "i3", "i4", "i5",
627 "o0", "o1", "o2", "o3", "o4", "o5",
628 "l0", "l1", "l2", "l3", "l4", "l5",
630 #elif defined(__arm__)
631 asm volatile ("mov pc, %0\n\t"
632 ".global exec_loop\n\t"
636 : "r1", "r2", "r3", "r8", "r9", "r10", "r12", "r14");
637 #elif defined(TARGET_I386) && defined(USE_CODE_COPY)
639 if (!(tb->cflags & CF_CODE_COPY)) {
640 if ((tb->cflags & CF_FP_USED) && env->native_fp_regs) {
641 save_native_fp_state(env);
645 if ((tb->cflags & CF_FP_USED) && !env->native_fp_regs) {
646 restore_native_fp_state(env);
648 /* we work with native eflags */
649 CC_SRC = cc_table[CC_OP].compute_all();
650 CC_OP = CC_OP_EFLAGS;
651 asm(".globl exec_loop\n"
656 " fs movl %11, %%eax\n"
657 " andl $0x400, %%eax\n"
658 " fs orl %8, %%eax\n"
661 " fs movl %%esp, %12\n"
662 " fs movl %0, %%eax\n"
663 " fs movl %1, %%ecx\n"
664 " fs movl %2, %%edx\n"
665 " fs movl %3, %%ebx\n"
666 " fs movl %4, %%esp\n"
667 " fs movl %5, %%ebp\n"
668 " fs movl %6, %%esi\n"
669 " fs movl %7, %%edi\n"
672 " fs movl %%esp, %4\n"
673 " fs movl %12, %%esp\n"
674 " fs movl %%eax, %0\n"
675 " fs movl %%ecx, %1\n"
676 " fs movl %%edx, %2\n"
677 " fs movl %%ebx, %3\n"
678 " fs movl %%ebp, %5\n"
679 " fs movl %%esi, %6\n"
680 " fs movl %%edi, %7\n"
683 " movl %%eax, %%ecx\n"
684 " andl $0x400, %%ecx\n"
686 " andl $0x8d5, %%eax\n"
687 " fs movl %%eax, %8\n"
689 " subl %%ecx, %%eax\n"
690 " fs movl %%eax, %11\n"
691 " fs movl %9, %%ebx\n" /* get T0 value */
694 : "m" (*(uint8_t *)offsetof(CPUState, regs[0])),
695 "m" (*(uint8_t *)offsetof(CPUState, regs[1])),
696 "m" (*(uint8_t *)offsetof(CPUState, regs[2])),
697 "m" (*(uint8_t *)offsetof(CPUState, regs[3])),
698 "m" (*(uint8_t *)offsetof(CPUState, regs[4])),
699 "m" (*(uint8_t *)offsetof(CPUState, regs[5])),
700 "m" (*(uint8_t *)offsetof(CPUState, regs[6])),
701 "m" (*(uint8_t *)offsetof(CPUState, regs[7])),
702 "m" (*(uint8_t *)offsetof(CPUState, cc_src)),
703 "m" (*(uint8_t *)offsetof(CPUState, tmp0)),
705 "m" (*(uint8_t *)offsetof(CPUState, df)),
706 "m" (*(uint8_t *)offsetof(CPUState, saved_esp))
711 #elif defined(__ia64)
718 fp.gp = code_gen_buffer + 2 * (1 << 20);
719 (*(void (*)(void)) &fp)();
723 env->current_tb = NULL;
724 /* reset soft MMU for next block (it can currently
725 only be set by a memory fault) */
726 #if defined(TARGET_I386) && !defined(CONFIG_SOFTMMU)
727 if (env->hflags & HF_SOFTMMU_MASK) {
728 env->hflags &= ~HF_SOFTMMU_MASK;
729 /* do not allow linking to another block */
733 #if defined(USE_KQEMU)
734 #define MIN_CYCLE_BEFORE_SWITCH (100 * 1000)
735 if (kqemu_is_ok(env) &&
736 (cpu_get_time_fast() - env->last_io_time) >= MIN_CYCLE_BEFORE_SWITCH) {
747 #if defined(TARGET_I386)
748 #if defined(USE_CODE_COPY)
749 if (env->native_fp_regs) {
750 save_native_fp_state(env);
753 /* restore flags in standard format */
754 env->eflags = env->eflags | cc_table[CC_OP].compute_all() | (DF & DF_MASK);
755 #elif defined(TARGET_ARM)
756 /* XXX: Save/restore host fpu exception state?. */
757 #elif defined(TARGET_SPARC)
758 #if defined(reg_REGWPTR)
759 REGWPTR = saved_regwptr;
761 #elif defined(TARGET_PPC)
762 #elif defined(TARGET_M68K)
763 cpu_m68k_flush_flags(env, env->cc_op);
764 env->cc_op = CC_OP_FLAGS;
765 env->sr = (env->sr & 0xffe0)
766 | env->cc_dest | (env->cc_x << 4);
767 #elif defined(TARGET_MIPS)
768 #elif defined(TARGET_SH4)
769 #elif defined(TARGET_ALPHA)
772 #error unsupported target CPU
775 /* restore global registers */
776 #if defined(__sparc__) && !defined(HOST_SOLARIS)
777 asm volatile ("mov %0, %%i7" : : "r" (saved_i7));
779 #include "hostregs_helper.h"
781 /* fail safe : never use cpu_single_env outside cpu_exec() */
782 cpu_single_env = NULL;
786 /* must only be called from the generated code as an exception can be
788 void tb_invalidate_page_range(target_ulong start, target_ulong end)
790 /* XXX: cannot enable it yet because it yields to MMU exception
791 where NIP != read address on PowerPC */
793 target_ulong phys_addr;
794 phys_addr = get_phys_addr_code(env, start);
795 tb_invalidate_phys_page_range(phys_addr, phys_addr + end - start, 0);
799 #if defined(TARGET_I386) && defined(CONFIG_USER_ONLY)
801 void cpu_x86_load_seg(CPUX86State *s, int seg_reg, int selector)
803 CPUX86State *saved_env;
807 if (!(env->cr[0] & CR0_PE_MASK) || (env->eflags & VM_MASK)) {
809 cpu_x86_load_seg_cache(env, seg_reg, selector,
810 (selector << 4), 0xffff, 0);
812 load_seg(seg_reg, selector);
817 void cpu_x86_fsave(CPUX86State *s, uint8_t *ptr, int data32)
819 CPUX86State *saved_env;
824 helper_fsave((target_ulong)ptr, data32);
829 void cpu_x86_frstor(CPUX86State *s, uint8_t *ptr, int data32)
831 CPUX86State *saved_env;
836 helper_frstor((target_ulong)ptr, data32);
841 #endif /* TARGET_I386 */
843 #if !defined(CONFIG_SOFTMMU)
845 #if defined(TARGET_I386)
847 /* 'pc' is the host PC at which the exception was raised. 'address' is
848 the effective address of the memory exception. 'is_write' is 1 if a
849 write caused the exception and otherwise 0'. 'old_set' is the
850 signal set which should be restored */
851 static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
852 int is_write, sigset_t *old_set,
855 TranslationBlock *tb;
859 env = cpu_single_env; /* XXX: find a correct solution for multithread */
860 #if defined(DEBUG_SIGNAL)
861 qemu_printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
862 pc, address, is_write, *(unsigned long *)old_set);
864 /* XXX: locking issue */
865 if (is_write && page_unprotect(h2g(address), pc, puc)) {
869 /* see if it is an MMU fault */
870 ret = cpu_x86_handle_mmu_fault(env, address, is_write,
871 ((env->hflags & HF_CPL_MASK) == 3), 0);
873 return 0; /* not an MMU fault */
875 return 1; /* the MMU fault was handled without causing real CPU fault */
876 /* now we have a real cpu fault */
879 /* the PC is inside the translated code. It means that we have
880 a virtual CPU fault */
881 cpu_restore_state(tb, env, pc, puc);
885 printf("PF exception: EIP=0x%08x CR2=0x%08x error=0x%x\n",
886 env->eip, env->cr[2], env->error_code);
888 /* we restore the process signal mask as the sigreturn should
889 do it (XXX: use sigsetjmp) */
890 sigprocmask(SIG_SETMASK, old_set, NULL);
891 raise_exception_err(env->exception_index, env->error_code);
893 /* activate soft MMU for this block */
894 env->hflags |= HF_SOFTMMU_MASK;
895 cpu_resume_from_signal(env, puc);
897 /* never comes here */
901 #elif defined(TARGET_ARM)
902 static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
903 int is_write, sigset_t *old_set,
906 TranslationBlock *tb;
910 env = cpu_single_env; /* XXX: find a correct solution for multithread */
911 #if defined(DEBUG_SIGNAL)
912 printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
913 pc, address, is_write, *(unsigned long *)old_set);
915 /* XXX: locking issue */
916 if (is_write && page_unprotect(h2g(address), pc, puc)) {
919 /* see if it is an MMU fault */
920 ret = cpu_arm_handle_mmu_fault(env, address, is_write, 1, 0);
922 return 0; /* not an MMU fault */
924 return 1; /* the MMU fault was handled without causing real CPU fault */
925 /* now we have a real cpu fault */
928 /* the PC is inside the translated code. It means that we have
929 a virtual CPU fault */
930 cpu_restore_state(tb, env, pc, puc);
932 /* we restore the process signal mask as the sigreturn should
933 do it (XXX: use sigsetjmp) */
934 sigprocmask(SIG_SETMASK, old_set, NULL);
937 #elif defined(TARGET_SPARC)
938 static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
939 int is_write, sigset_t *old_set,
942 TranslationBlock *tb;
946 env = cpu_single_env; /* XXX: find a correct solution for multithread */
947 #if defined(DEBUG_SIGNAL)
948 printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
949 pc, address, is_write, *(unsigned long *)old_set);
951 /* XXX: locking issue */
952 if (is_write && page_unprotect(h2g(address), pc, puc)) {
955 /* see if it is an MMU fault */
956 ret = cpu_sparc_handle_mmu_fault(env, address, is_write, 1, 0);
958 return 0; /* not an MMU fault */
960 return 1; /* the MMU fault was handled without causing real CPU fault */
961 /* now we have a real cpu fault */
964 /* the PC is inside the translated code. It means that we have
965 a virtual CPU fault */
966 cpu_restore_state(tb, env, pc, puc);
968 /* we restore the process signal mask as the sigreturn should
969 do it (XXX: use sigsetjmp) */
970 sigprocmask(SIG_SETMASK, old_set, NULL);
973 #elif defined (TARGET_PPC)
974 static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
975 int is_write, sigset_t *old_set,
978 TranslationBlock *tb;
982 env = cpu_single_env; /* XXX: find a correct solution for multithread */
983 #if defined(DEBUG_SIGNAL)
984 printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
985 pc, address, is_write, *(unsigned long *)old_set);
987 /* XXX: locking issue */
988 if (is_write && page_unprotect(h2g(address), pc, puc)) {
992 /* see if it is an MMU fault */
993 ret = cpu_ppc_handle_mmu_fault(env, address, is_write, msr_pr, 0);
995 return 0; /* not an MMU fault */
997 return 1; /* the MMU fault was handled without causing real CPU fault */
999 /* now we have a real cpu fault */
1000 tb = tb_find_pc(pc);
1002 /* the PC is inside the translated code. It means that we have
1003 a virtual CPU fault */
1004 cpu_restore_state(tb, env, pc, puc);
1008 printf("PF exception: NIP=0x%08x error=0x%x %p\n",
1009 env->nip, env->error_code, tb);
1011 /* we restore the process signal mask as the sigreturn should
1012 do it (XXX: use sigsetjmp) */
1013 sigprocmask(SIG_SETMASK, old_set, NULL);
1014 do_raise_exception_err(env->exception_index, env->error_code);
1016 /* activate soft MMU for this block */
1017 cpu_resume_from_signal(env, puc);
1019 /* never comes here */
1023 #elif defined(TARGET_M68K)
1024 static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
1025 int is_write, sigset_t *old_set,
1028 TranslationBlock *tb;
1032 env = cpu_single_env; /* XXX: find a correct solution for multithread */
1033 #if defined(DEBUG_SIGNAL)
1034 printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
1035 pc, address, is_write, *(unsigned long *)old_set);
1037 /* XXX: locking issue */
1038 if (is_write && page_unprotect(address, pc, puc)) {
1041 /* see if it is an MMU fault */
1042 ret = cpu_m68k_handle_mmu_fault(env, address, is_write, 1, 0);
1044 return 0; /* not an MMU fault */
1046 return 1; /* the MMU fault was handled without causing real CPU fault */
1047 /* now we have a real cpu fault */
1048 tb = tb_find_pc(pc);
1050 /* the PC is inside the translated code. It means that we have
1051 a virtual CPU fault */
1052 cpu_restore_state(tb, env, pc, puc);
1054 /* we restore the process signal mask as the sigreturn should
1055 do it (XXX: use sigsetjmp) */
1056 sigprocmask(SIG_SETMASK, old_set, NULL);
1058 /* never comes here */
1062 #elif defined (TARGET_MIPS)
1063 static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
1064 int is_write, sigset_t *old_set,
1067 TranslationBlock *tb;
1071 env = cpu_single_env; /* XXX: find a correct solution for multithread */
1072 #if defined(DEBUG_SIGNAL)
1073 printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
1074 pc, address, is_write, *(unsigned long *)old_set);
1076 /* XXX: locking issue */
1077 if (is_write && page_unprotect(h2g(address), pc, puc)) {
1081 /* see if it is an MMU fault */
1082 ret = cpu_mips_handle_mmu_fault(env, address, is_write, 1, 0);
1084 return 0; /* not an MMU fault */
1086 return 1; /* the MMU fault was handled without causing real CPU fault */
1088 /* now we have a real cpu fault */
1089 tb = tb_find_pc(pc);
1091 /* the PC is inside the translated code. It means that we have
1092 a virtual CPU fault */
1093 cpu_restore_state(tb, env, pc, puc);
1097 printf("PF exception: PC=0x" TARGET_FMT_lx " error=0x%x %p\n",
1098 env->PC, env->error_code, tb);
1100 /* we restore the process signal mask as the sigreturn should
1101 do it (XXX: use sigsetjmp) */
1102 sigprocmask(SIG_SETMASK, old_set, NULL);
1103 do_raise_exception_err(env->exception_index, env->error_code);
1105 /* activate soft MMU for this block */
1106 cpu_resume_from_signal(env, puc);
1108 /* never comes here */
1112 #elif defined (TARGET_SH4)
1113 static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
1114 int is_write, sigset_t *old_set,
1117 TranslationBlock *tb;
1121 env = cpu_single_env; /* XXX: find a correct solution for multithread */
1122 #if defined(DEBUG_SIGNAL)
1123 printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
1124 pc, address, is_write, *(unsigned long *)old_set);
1126 /* XXX: locking issue */
1127 if (is_write && page_unprotect(h2g(address), pc, puc)) {
1131 /* see if it is an MMU fault */
1132 ret = cpu_sh4_handle_mmu_fault(env, address, is_write, 1, 0);
1134 return 0; /* not an MMU fault */
1136 return 1; /* the MMU fault was handled without causing real CPU fault */
1138 /* now we have a real cpu fault */
1139 tb = tb_find_pc(pc);
1141 /* the PC is inside the translated code. It means that we have
1142 a virtual CPU fault */
1143 cpu_restore_state(tb, env, pc, puc);
1146 printf("PF exception: NIP=0x%08x error=0x%x %p\n",
1147 env->nip, env->error_code, tb);
1149 /* we restore the process signal mask as the sigreturn should
1150 do it (XXX: use sigsetjmp) */
1151 sigprocmask(SIG_SETMASK, old_set, NULL);
1153 /* never comes here */
1157 #elif defined (TARGET_ALPHA)
1158 static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
1159 int is_write, sigset_t *old_set,
1162 TranslationBlock *tb;
1166 env = cpu_single_env; /* XXX: find a correct solution for multithread */
1167 #if defined(DEBUG_SIGNAL)
1168 printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
1169 pc, address, is_write, *(unsigned long *)old_set);
1171 /* XXX: locking issue */
1172 if (is_write && page_unprotect(h2g(address), pc, puc)) {
1176 /* see if it is an MMU fault */
1177 ret = cpu_alpha_handle_mmu_fault(env, address, is_write, 1, 0);
1179 return 0; /* not an MMU fault */
1181 return 1; /* the MMU fault was handled without causing real CPU fault */
1183 /* now we have a real cpu fault */
1184 tb = tb_find_pc(pc);
1186 /* the PC is inside the translated code. It means that we have
1187 a virtual CPU fault */
1188 cpu_restore_state(tb, env, pc, puc);
1191 printf("PF exception: NIP=0x%08x error=0x%x %p\n",
1192 env->nip, env->error_code, tb);
1194 /* we restore the process signal mask as the sigreturn should
1195 do it (XXX: use sigsetjmp) */
1196 sigprocmask(SIG_SETMASK, old_set, NULL);
1198 /* never comes here */
1202 #error unsupported target CPU
1205 #if defined(__i386__)
1207 #if defined(__APPLE__)
1208 # include <sys/ucontext.h>
1210 # define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.eip))
1211 # define TRAP_sig(context) ((context)->uc_mcontext->es.trapno)
1212 # define ERROR_sig(context) ((context)->uc_mcontext->es.err)
1214 # define EIP_sig(context) ((context)->uc_mcontext.gregs[REG_EIP])
1215 # define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
1216 # define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
1219 #if defined(USE_CODE_COPY)
1220 static void cpu_send_trap(unsigned long pc, int trap,
1221 struct ucontext *uc)
1223 TranslationBlock *tb;
1226 env = cpu_single_env; /* XXX: find a correct solution for multithread */
1227 /* now we have a real cpu fault */
1228 tb = tb_find_pc(pc);
1230 /* the PC is inside the translated code. It means that we have
1231 a virtual CPU fault */
1232 cpu_restore_state(tb, env, pc, uc);
1234 sigprocmask(SIG_SETMASK, &uc->uc_sigmask, NULL);
1235 raise_exception_err(trap, env->error_code);
1239 int cpu_signal_handler(int host_signum, void *pinfo,
1242 siginfo_t *info = pinfo;
1243 struct ucontext *uc = puc;
1251 #define REG_TRAPNO TRAPNO
1254 trapno = TRAP_sig(uc);
1255 #if defined(TARGET_I386) && defined(USE_CODE_COPY)
1256 if (trapno == 0x00 || trapno == 0x05) {
1257 /* send division by zero or bound exception */
1258 cpu_send_trap(pc, trapno, uc);
1262 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1264 (ERROR_sig(uc) >> 1) & 1 : 0,
1265 &uc->uc_sigmask, puc);
1268 #elif defined(__x86_64__)
1270 int cpu_signal_handler(int host_signum, void *pinfo,
1273 siginfo_t *info = pinfo;
1274 struct ucontext *uc = puc;
1277 pc = uc->uc_mcontext.gregs[REG_RIP];
1278 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1279 uc->uc_mcontext.gregs[REG_TRAPNO] == 0xe ?
1280 (uc->uc_mcontext.gregs[REG_ERR] >> 1) & 1 : 0,
1281 &uc->uc_sigmask, puc);
1284 #elif defined(__powerpc__)
1286 /***********************************************************************
1287 * signal context platform-specific definitions
1291 /* All Registers access - only for local access */
1292 # define REG_sig(reg_name, context) ((context)->uc_mcontext.regs->reg_name)
1293 /* Gpr Registers access */
1294 # define GPR_sig(reg_num, context) REG_sig(gpr[reg_num], context)
1295 # define IAR_sig(context) REG_sig(nip, context) /* Program counter */
1296 # define MSR_sig(context) REG_sig(msr, context) /* Machine State Register (Supervisor) */
1297 # define CTR_sig(context) REG_sig(ctr, context) /* Count register */
1298 # define XER_sig(context) REG_sig(xer, context) /* User's integer exception register */
1299 # define LR_sig(context) REG_sig(link, context) /* Link register */
1300 # define CR_sig(context) REG_sig(ccr, context) /* Condition register */
1301 /* Float Registers access */
1302 # define FLOAT_sig(reg_num, context) (((double*)((char*)((context)->uc_mcontext.regs+48*4)))[reg_num])
1303 # define FPSCR_sig(context) (*(int*)((char*)((context)->uc_mcontext.regs+(48+32*2)*4)))
1304 /* Exception Registers access */
1305 # define DAR_sig(context) REG_sig(dar, context)
1306 # define DSISR_sig(context) REG_sig(dsisr, context)
1307 # define TRAP_sig(context) REG_sig(trap, context)
1311 # include <sys/ucontext.h>
1312 typedef struct ucontext SIGCONTEXT;
1313 /* All Registers access - only for local access */
1314 # define REG_sig(reg_name, context) ((context)->uc_mcontext->ss.reg_name)
1315 # define FLOATREG_sig(reg_name, context) ((context)->uc_mcontext->fs.reg_name)
1316 # define EXCEPREG_sig(reg_name, context) ((context)->uc_mcontext->es.reg_name)
1317 # define VECREG_sig(reg_name, context) ((context)->uc_mcontext->vs.reg_name)
1318 /* Gpr Registers access */
1319 # define GPR_sig(reg_num, context) REG_sig(r##reg_num, context)
1320 # define IAR_sig(context) REG_sig(srr0, context) /* Program counter */
1321 # define MSR_sig(context) REG_sig(srr1, context) /* Machine State Register (Supervisor) */
1322 # define CTR_sig(context) REG_sig(ctr, context)
1323 # define XER_sig(context) REG_sig(xer, context) /* Link register */
1324 # define LR_sig(context) REG_sig(lr, context) /* User's integer exception register */
1325 # define CR_sig(context) REG_sig(cr, context) /* Condition register */
1326 /* Float Registers access */
1327 # define FLOAT_sig(reg_num, context) FLOATREG_sig(fpregs[reg_num], context)
1328 # define FPSCR_sig(context) ((double)FLOATREG_sig(fpscr, context))
1329 /* Exception Registers access */
1330 # define DAR_sig(context) EXCEPREG_sig(dar, context) /* Fault registers for coredump */
1331 # define DSISR_sig(context) EXCEPREG_sig(dsisr, context)
1332 # define TRAP_sig(context) EXCEPREG_sig(exception, context) /* number of powerpc exception taken */
1333 #endif /* __APPLE__ */
1335 int cpu_signal_handler(int host_signum, void *pinfo,
1338 siginfo_t *info = pinfo;
1339 struct ucontext *uc = puc;
1347 if (DSISR_sig(uc) & 0x00800000)
1350 if (TRAP_sig(uc) != 0x400 && (DSISR_sig(uc) & 0x02000000))
1353 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1354 is_write, &uc->uc_sigmask, puc);
1357 #elif defined(__alpha__)
1359 int cpu_signal_handler(int host_signum, void *pinfo,
1362 siginfo_t *info = pinfo;
1363 struct ucontext *uc = puc;
1364 uint32_t *pc = uc->uc_mcontext.sc_pc;
1365 uint32_t insn = *pc;
1368 /* XXX: need kernel patch to get write flag faster */
1369 switch (insn >> 26) {
1384 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1385 is_write, &uc->uc_sigmask, puc);
1387 #elif defined(__sparc__)
1389 int cpu_signal_handler(int host_signum, void *pinfo,
1392 siginfo_t *info = pinfo;
1393 uint32_t *regs = (uint32_t *)(info + 1);
1394 void *sigmask = (regs + 20);
1399 /* XXX: is there a standard glibc define ? */
1401 /* XXX: need kernel patch to get write flag faster */
1403 insn = *(uint32_t *)pc;
1404 if ((insn >> 30) == 3) {
1405 switch((insn >> 19) & 0x3f) {
1417 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1418 is_write, sigmask, NULL);
1421 #elif defined(__arm__)
1423 int cpu_signal_handler(int host_signum, void *pinfo,
1426 siginfo_t *info = pinfo;
1427 struct ucontext *uc = puc;
1431 pc = uc->uc_mcontext.gregs[R15];
1432 /* XXX: compute is_write */
1434 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1436 &uc->uc_sigmask, puc);
1439 #elif defined(__mc68000)
1441 int cpu_signal_handler(int host_signum, void *pinfo,
1444 siginfo_t *info = pinfo;
1445 struct ucontext *uc = puc;
1449 pc = uc->uc_mcontext.gregs[16];
1450 /* XXX: compute is_write */
1452 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1454 &uc->uc_sigmask, puc);
1457 #elif defined(__ia64)
1460 /* This ought to be in <bits/siginfo.h>... */
1461 # define __ISR_VALID 1
1464 int cpu_signal_handler(int host_signum, void *pinfo, void *puc)
1466 siginfo_t *info = pinfo;
1467 struct ucontext *uc = puc;
1471 ip = uc->uc_mcontext.sc_ip;
1472 switch (host_signum) {
1478 if (info->si_code && (info->si_segvflags & __ISR_VALID))
1479 /* ISR.W (write-access) is bit 33: */
1480 is_write = (info->si_isr >> 33) & 1;
1486 return handle_cpu_signal(ip, (unsigned long)info->si_addr,
1488 &uc->uc_sigmask, puc);
1491 #elif defined(__s390__)
1493 int cpu_signal_handler(int host_signum, void *pinfo,
1496 siginfo_t *info = pinfo;
1497 struct ucontext *uc = puc;
1501 pc = uc->uc_mcontext.psw.addr;
1502 /* XXX: compute is_write */
1504 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1505 is_write, &uc->uc_sigmask, puc);
1508 #elif defined(__mips__)
1510 int cpu_signal_handler(int host_signum, void *pinfo,
1513 siginfo_t *info = pinfo;
1514 struct ucontext *uc = puc;
1515 greg_t pc = uc->uc_mcontext.pc;
1518 /* XXX: compute is_write */
1520 return handle_cpu_signal(pc, (unsigned long)info->si_addr,
1521 is_write, &uc->uc_sigmask, puc);
1526 #error host CPU specific signal handler needed
1530 #endif /* !defined(CONFIG_SOFTMMU) */