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