cpu-exec.c

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