bsd-user/main.c

   1 /*
   2  *  qemu user main
   3  *
   4  *  Copyright (c) 2003-2008 Fabrice Bellard
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program 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
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19 #include <stdlib.h>
  20 #include <stdio.h>
  21 #include <stdarg.h>
  22 #include <string.h>
  23 #include <errno.h>
  24 #include <unistd.h>
  25 #include <machine/trap.h>
  26 #include <sys/types.h>
  27 #include <sys/mman.h>
  28
  29 #include "qemu.h"
  30 #include "qemu-common.h"
  31 /* For tb_lock */
  32 #include "cpu.h"
  33 #include "tcg.h"
  34 #include "qemu/timer.h"
  35 #include "qemu/envlist.h"
  36
  37 int singlestep;
  38 #if defined(CONFIG_USE_GUEST_BASE)
  39 unsigned long mmap_min_addr;
  40 unsigned long guest_base;
  41 int have_guest_base;
  42 unsigned long reserved_va;
  43 #endif
  44
  45 static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX;
  46 const char *qemu_uname_release;
  47 extern char **environ;
  48 enum BSDType bsd_type;
  49
  50 /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
  51    we allocate a bigger stack. Need a better solution, for example
  52    by remapping the process stack directly at the right place */
  53 unsigned long x86_stack_size = 512 * 1024;
  54
  55 void gemu_log(const char *fmt, ...)
  56 {
  57     va_list ap;
  58
  59     va_start(ap, fmt);
  60     vfprintf(stderr, fmt, ap);
  61     va_end(ap);
  62 }
  63
  64 #if defined(TARGET_I386)
  65 int cpu_get_pic_interrupt(CPUX86State *env)
  66 {
  67     return -1;
  68 }
  69 #endif
  70
  71 /* These are no-ops because we are not threadsafe.  */
  72 static inline void cpu_exec_start(CPUArchState *env)
  73 {
  74 }
  75
  76 static inline void cpu_exec_end(CPUArchState *env)
  77 {
  78 }
  79
  80 static inline void start_exclusive(void)
  81 {
  82 }
  83
  84 static inline void end_exclusive(void)
  85 {
  86 }
  87
  88 void fork_start(void)
  89 {
  90 }
  91
  92 void fork_end(int child)
  93 {
  94     if (child) {
  95         gdbserver_fork((CPUArchState *)thread_cpu->env_ptr);
  96     }
  97 }
  98
  99 void cpu_list_lock(void)
 100 {
 101 }
 102
 103 void cpu_list_unlock(void)
 104 {
 105 }
 106
 107 #ifdef TARGET_I386
 108 /***********************************************************/
 109 /* CPUX86 core interface */
 110
 111 void cpu_smm_update(CPUX86State *env)
 112 {
 113 }
 114
 115 uint64_t cpu_get_tsc(CPUX86State *env)
 116 {
 117     return cpu_get_real_ticks();
 118 }
 119
 120 static void write_dt(void *ptr, unsigned long addr, unsigned long limit,
 121                      int flags)
 122 {
 123     unsigned int e1, e2;
 124     uint32_t *p;
 125     e1 = (addr << 16) | (limit & 0xffff);
 126     e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
 127     e2 |= flags;
 128     p = ptr;
 129     p[0] = tswap32(e1);
 130     p[1] = tswap32(e2);
 131 }
 132
 133 static uint64_t *idt_table;
 134 #ifdef TARGET_X86_64
 135 static void set_gate64(void *ptr, unsigned int type, unsigned int dpl,
 136                        uint64_t addr, unsigned int sel)
 137 {
 138     uint32_t *p, e1, e2;
 139     e1 = (addr & 0xffff) | (sel << 16);
 140     e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
 141     p = ptr;
 142     p[0] = tswap32(e1);
 143     p[1] = tswap32(e2);
 144     p[2] = tswap32(addr >> 32);
 145     p[3] = 0;
 146 }
 147 /* only dpl matters as we do only user space emulation */
 148 static void set_idt(int n, unsigned int dpl)
 149 {
 150     set_gate64(idt_table + n * 2, 0, dpl, 0, 0);
 151 }
 152 #else
 153 static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
 154                      uint32_t addr, unsigned int sel)
 155 {
 156     uint32_t *p, e1, e2;
 157     e1 = (addr & 0xffff) | (sel << 16);
 158     e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
 159     p = ptr;
 160     p[0] = tswap32(e1);
 161     p[1] = tswap32(e2);
 162 }
 163
 164 /* only dpl matters as we do only user space emulation */
 165 static void set_idt(int n, unsigned int dpl)
 166 {
 167     set_gate(idt_table + n, 0, dpl, 0, 0);
 168 }
 169 #endif
 170
 171 void cpu_loop(CPUX86State *env)
 172 {
 173     int trapnr;
 174     abi_ulong pc;
 175     //target_siginfo_t info;
 176
 177     for(;;) {
 178         trapnr = cpu_x86_exec(env);
 179         switch(trapnr) {
 180         case 0x80:
 181             /* syscall from int $0x80 */
 182             if (bsd_type == target_freebsd) {
 183                 abi_ulong params = (abi_ulong) env->regs[R_ESP] +
 184                     sizeof(int32_t);
 185                 int32_t syscall_nr = env->regs[R_EAX];
 186                 int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8;
 187
 188                 if (syscall_nr == TARGET_FREEBSD_NR_syscall) {
 189                     get_user_s32(syscall_nr, params);
 190                     params += sizeof(int32_t);
 191                 } else if (syscall_nr == TARGET_FREEBSD_NR___syscall) {
 192                     get_user_s32(syscall_nr, params);
 193                     params += sizeof(int64_t);
 194                 }
 195                 get_user_s32(arg1, params);
 196                 params += sizeof(int32_t);
 197                 get_user_s32(arg2, params);
 198                 params += sizeof(int32_t);
 199                 get_user_s32(arg3, params);
 200                 params += sizeof(int32_t);
 201                 get_user_s32(arg4, params);
 202                 params += sizeof(int32_t);
 203                 get_user_s32(arg5, params);
 204                 params += sizeof(int32_t);
 205                 get_user_s32(arg6, params);
 206                 params += sizeof(int32_t);
 207                 get_user_s32(arg7, params);
 208                 params += sizeof(int32_t);
 209                 get_user_s32(arg8, params);
 210                 env->regs[R_EAX] = do_freebsd_syscall(env,
 211                                                       syscall_nr,
 212                                                       arg1,
 213                                                       arg2,
 214                                                       arg3,
 215                                                       arg4,
 216                                                       arg5,
 217                                                       arg6,
 218                                                       arg7,
 219                                                       arg8);
 220             } else { //if (bsd_type == target_openbsd)
 221                 env->regs[R_EAX] = do_openbsd_syscall(env,
 222                                                       env->regs[R_EAX],
 223                                                       env->regs[R_EBX],
 224                                                       env->regs[R_ECX],
 225                                                       env->regs[R_EDX],
 226                                                       env->regs[R_ESI],
 227                                                       env->regs[R_EDI],
 228                                                       env->regs[R_EBP]);
 229             }
 230             if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) {
 231                 env->regs[R_EAX] = -env->regs[R_EAX];
 232                 env->eflags |= CC_C;
 233             } else {
 234                 env->eflags &= ~CC_C;
 235             }
 236             break;
 237 #ifndef TARGET_ABI32
 238         case EXCP_SYSCALL:
 239             /* syscall from syscall instruction */
 240             if (bsd_type == target_freebsd)
 241                 env->regs[R_EAX] = do_freebsd_syscall(env,
 242                                                       env->regs[R_EAX],
 243                                                       env->regs[R_EDI],
 244                                                       env->regs[R_ESI],
 245                                                       env->regs[R_EDX],
 246                                                       env->regs[R_ECX],
 247                                                       env->regs[8],
 248                                                       env->regs[9], 0, 0);
 249             else { //if (bsd_type == target_openbsd)
 250                 env->regs[R_EAX] = do_openbsd_syscall(env,
 251                                                       env->regs[R_EAX],
 252                                                       env->regs[R_EDI],
 253                                                       env->regs[R_ESI],
 254                                                       env->regs[R_EDX],
 255                                                       env->regs[10],
 256                                                       env->regs[8],
 257                                                       env->regs[9]);
 258             }
 259             env->eip = env->exception_next_eip;
 260             if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) {
 261                 env->regs[R_EAX] = -env->regs[R_EAX];
 262                 env->eflags |= CC_C;
 263             } else {
 264                 env->eflags &= ~CC_C;
 265             }
 266             break;
 267 #endif
 268 #if 0
 269         case EXCP0B_NOSEG:
 270         case EXCP0C_STACK:
 271             info.si_signo = SIGBUS;
 272             info.si_errno = 0;
 273             info.si_code = TARGET_SI_KERNEL;
 274             info._sifields._sigfault._addr = 0;
 275             queue_signal(env, info.si_signo, &info);
 276             break;
 277         case EXCP0D_GPF:
 278             /* XXX: potential problem if ABI32 */
 279 #ifndef TARGET_X86_64
 280             if (env->eflags & VM_MASK) {
 281                 handle_vm86_fault(env);
 282             } else
 283 #endif
 284             {
 285                 info.si_signo = SIGSEGV;
 286                 info.si_errno = 0;
 287                 info.si_code = TARGET_SI_KERNEL;
 288                 info._sifields._sigfault._addr = 0;
 289                 queue_signal(env, info.si_signo, &info);
 290             }
 291             break;
 292         case EXCP0E_PAGE:
 293             info.si_signo = SIGSEGV;
 294             info.si_errno = 0;
 295             if (!(env->error_code & 1))
 296                 info.si_code = TARGET_SEGV_MAPERR;
 297             else
 298                 info.si_code = TARGET_SEGV_ACCERR;
 299             info._sifields._sigfault._addr = env->cr[2];
 300             queue_signal(env, info.si_signo, &info);
 301             break;
 302         case EXCP00_DIVZ:
 303 #ifndef TARGET_X86_64
 304             if (env->eflags & VM_MASK) {
 305                 handle_vm86_trap(env, trapnr);
 306             } else
 307 #endif
 308             {
 309                 /* division by zero */
 310                 info.si_signo = SIGFPE;
 311                 info.si_errno = 0;
 312                 info.si_code = TARGET_FPE_INTDIV;
 313                 info._sifields._sigfault._addr = env->eip;
 314                 queue_signal(env, info.si_signo, &info);
 315             }
 316             break;
 317         case EXCP01_DB:
 318         case EXCP03_INT3:
 319 #ifndef TARGET_X86_64
 320             if (env->eflags & VM_MASK) {
 321                 handle_vm86_trap(env, trapnr);
 322             } else
 323 #endif
 324             {
 325                 info.si_signo = SIGTRAP;
 326                 info.si_errno = 0;
 327                 if (trapnr == EXCP01_DB) {
 328                     info.si_code = TARGET_TRAP_BRKPT;
 329                     info._sifields._sigfault._addr = env->eip;
 330                 } else {
 331                     info.si_code = TARGET_SI_KERNEL;
 332                     info._sifields._sigfault._addr = 0;
 333                 }
 334                 queue_signal(env, info.si_signo, &info);
 335             }
 336             break;
 337         case EXCP04_INTO:
 338         case EXCP05_BOUND:
 339 #ifndef TARGET_X86_64
 340             if (env->eflags & VM_MASK) {
 341                 handle_vm86_trap(env, trapnr);
 342             } else
 343 #endif
 344             {
 345                 info.si_signo = SIGSEGV;
 346                 info.si_errno = 0;
 347                 info.si_code = TARGET_SI_KERNEL;
 348                 info._sifields._sigfault._addr = 0;
 349                 queue_signal(env, info.si_signo, &info);
 350             }
 351             break;
 352         case EXCP06_ILLOP:
 353             info.si_signo = SIGILL;
 354             info.si_errno = 0;
 355             info.si_code = TARGET_ILL_ILLOPN;
 356             info._sifields._sigfault._addr = env->eip;
 357             queue_signal(env, info.si_signo, &info);
 358             break;
 359 #endif
 360         case EXCP_INTERRUPT:
 361             /* just indicate that signals should be handled asap */
 362             break;
 363 #if 0
 364         case EXCP_DEBUG:
 365             {
 366                 int sig;
 367
 368                 sig = gdb_handlesig (env, TARGET_SIGTRAP);
 369                 if (sig)
 370                   {
 371                     info.si_signo = sig;
 372                     info.si_errno = 0;
 373                     info.si_code = TARGET_TRAP_BRKPT;
 374                     queue_signal(env, info.si_signo, &info);
 375                   }
 376             }
 377             break;
 378 #endif
 379         default:
 380             pc = env->segs[R_CS].base + env->eip;
 381             fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
 382                     (long)pc, trapnr);
 383             abort();
 384         }
 385         process_pending_signals(env);
 386     }
 387 }
 388 #endif
 389
 390 #ifdef TARGET_SPARC
 391 #define SPARC64_STACK_BIAS 2047
 392
 393 //#define DEBUG_WIN
 394 /* WARNING: dealing with register windows _is_ complicated. More info
 395    can be found at http://www.sics.se/~psm/sparcstack.html */
 396 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index)
 397 {
 398     index = (index + cwp * 16) % (16 * env->nwindows);
 399     /* wrap handling : if cwp is on the last window, then we use the
 400        registers 'after' the end */
 401     if (index < 8 && env->cwp == env->nwindows - 1)
 402         index += 16 * env->nwindows;
 403     return index;
 404 }
 405
 406 /* save the register window 'cwp1' */
 407 static inline void save_window_offset(CPUSPARCState *env, int cwp1)
 408 {
 409     unsigned int i;
 410     abi_ulong sp_ptr;
 411
 412     sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
 413 #ifdef TARGET_SPARC64
 414     if (sp_ptr & 3)
 415         sp_ptr += SPARC64_STACK_BIAS;
 416 #endif
 417 #if defined(DEBUG_WIN)
 418     printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n",
 419            sp_ptr, cwp1);
 420 #endif
 421     for(i = 0; i < 16; i++) {
 422         /* FIXME - what to do if put_user() fails? */
 423         put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
 424         sp_ptr += sizeof(abi_ulong);
 425     }
 426 }
 427
 428 static void save_window(CPUSPARCState *env)
 429 {
 430 #ifndef TARGET_SPARC64
 431     unsigned int new_wim;
 432     new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) &
 433         ((1LL << env->nwindows) - 1);
 434     save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
 435     env->wim = new_wim;
 436 #else
 437     save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
 438     env->cansave++;
 439     env->canrestore--;
 440 #endif
 441 }
 442
 443 static void restore_window(CPUSPARCState *env)
 444 {
 445 #ifndef TARGET_SPARC64
 446     unsigned int new_wim;
 447 #endif
 448     unsigned int i, cwp1;
 449     abi_ulong sp_ptr;
 450
 451 #ifndef TARGET_SPARC64
 452     new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) &
 453         ((1LL << env->nwindows) - 1);
 454 #endif
 455
 456     /* restore the invalid window */
 457     cwp1 = cpu_cwp_inc(env, env->cwp + 1);
 458     sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
 459 #ifdef TARGET_SPARC64
 460     if (sp_ptr & 3)
 461         sp_ptr += SPARC64_STACK_BIAS;
 462 #endif
 463 #if defined(DEBUG_WIN)
 464     printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n",
 465            sp_ptr, cwp1);
 466 #endif
 467     for(i = 0; i < 16; i++) {
 468         /* FIXME - what to do if get_user() fails? */
 469         get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
 470         sp_ptr += sizeof(abi_ulong);
 471     }
 472 #ifdef TARGET_SPARC64
 473     env->canrestore++;
 474     if (env->cleanwin < env->nwindows - 1)
 475         env->cleanwin++;
 476     env->cansave--;
 477 #else
 478     env->wim = new_wim;
 479 #endif
 480 }
 481
 482 static void flush_windows(CPUSPARCState *env)
 483 {
 484     int offset, cwp1;
 485
 486     offset = 1;
 487     for(;;) {
 488         /* if restore would invoke restore_window(), then we can stop */
 489         cwp1 = cpu_cwp_inc(env, env->cwp + offset);
 490 #ifndef TARGET_SPARC64
 491         if (env->wim & (1 << cwp1))
 492             break;
 493 #else
 494         if (env->canrestore == 0)
 495             break;
 496         env->cansave++;
 497         env->canrestore--;
 498 #endif
 499         save_window_offset(env, cwp1);
 500         offset++;
 501     }
 502     cwp1 = cpu_cwp_inc(env, env->cwp + 1);
 503 #ifndef TARGET_SPARC64
 504     /* set wim so that restore will reload the registers */
 505     env->wim = 1 << cwp1;
 506 #endif
 507 #if defined(DEBUG_WIN)
 508     printf("flush_windows: nb=%d\n", offset - 1);
 509 #endif
 510 }
 511
 512 void cpu_loop(CPUSPARCState *env)
 513 {
 514     CPUState *cs = CPU(sparc_env_get_cpu(env));
 515     int trapnr, ret, syscall_nr;
 516     //target_siginfo_t info;
 517
 518     while (1) {
 519         trapnr = cpu_sparc_exec (env);
 520
 521         switch (trapnr) {
 522 #ifndef TARGET_SPARC64
 523         case 0x80:
 524 #else
 525         /* FreeBSD uses 0x141 for syscalls too */
 526         case 0x141:
 527             if (bsd_type != target_freebsd)
 528                 goto badtrap;
 529         case 0x100:
 530 #endif
 531             syscall_nr = env->gregs[1];
 532             if (bsd_type == target_freebsd)
 533                 ret = do_freebsd_syscall(env, syscall_nr,
 534                                          env->regwptr[0], env->regwptr[1],
 535                                          env->regwptr[2], env->regwptr[3],
 536                                          env->regwptr[4], env->regwptr[5], 0, 0);
 537             else if (bsd_type == target_netbsd)
 538                 ret = do_netbsd_syscall(env, syscall_nr,
 539                                         env->regwptr[0], env->regwptr[1],
 540                                         env->regwptr[2], env->regwptr[3],
 541                                         env->regwptr[4], env->regwptr[5]);
 542             else { //if (bsd_type == target_openbsd)
 543 #if defined(TARGET_SPARC64)
 544                 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG |
 545                                 TARGET_OPENBSD_SYSCALL_G2RFLAG);
 546 #endif
 547                 ret = do_openbsd_syscall(env, syscall_nr,
 548                                          env->regwptr[0], env->regwptr[1],
 549                                          env->regwptr[2], env->regwptr[3],
 550                                          env->regwptr[4], env->regwptr[5]);
 551             }
 552             if ((unsigned int)ret >= (unsigned int)(-515)) {
 553                 ret = -ret;
 554 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
 555                 env->xcc |= PSR_CARRY;
 556 #else
 557                 env->psr |= PSR_CARRY;
 558 #endif
 559             } else {
 560 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
 561                 env->xcc &= ~PSR_CARRY;
 562 #else
 563                 env->psr &= ~PSR_CARRY;
 564 #endif
 565             }
 566             env->regwptr[0] = ret;
 567             /* next instruction */
 568 #if defined(TARGET_SPARC64)
 569             if (bsd_type == target_openbsd &&
 570                 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) {
 571                 env->pc = env->gregs[2];
 572                 env->npc = env->pc + 4;
 573             } else if (bsd_type == target_openbsd &&
 574                        env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) {
 575                 env->pc = env->gregs[7];
 576                 env->npc = env->pc + 4;
 577             } else {
 578                 env->pc = env->npc;
 579                 env->npc = env->npc + 4;
 580             }
 581 #else
 582             env->pc = env->npc;
 583             env->npc = env->npc + 4;
 584 #endif
 585             break;
 586         case 0x83: /* flush windows */
 587 #ifdef TARGET_ABI32
 588         case 0x103:
 589 #endif
 590             flush_windows(env);
 591             /* next instruction */
 592             env->pc = env->npc;
 593             env->npc = env->npc + 4;
 594             break;
 595 #ifndef TARGET_SPARC64
 596         case TT_WIN_OVF: /* window overflow */
 597             save_window(env);
 598             break;
 599         case TT_WIN_UNF: /* window underflow */
 600             restore_window(env);
 601             break;
 602         case TT_TFAULT:
 603         case TT_DFAULT:
 604 #if 0
 605             {
 606                 info.si_signo = SIGSEGV;
 607                 info.si_errno = 0;
 608                 /* XXX: check env->error_code */
 609                 info.si_code = TARGET_SEGV_MAPERR;
 610                 info._sifields._sigfault._addr = env->mmuregs[4];
 611                 queue_signal(env, info.si_signo, &info);
 612             }
 613 #endif
 614             break;
 615 #else
 616         case TT_SPILL: /* window overflow */
 617             save_window(env);
 618             break;
 619         case TT_FILL: /* window underflow */
 620             restore_window(env);
 621             break;
 622         case TT_TFAULT:
 623         case TT_DFAULT:
 624 #if 0
 625             {
 626                 info.si_signo = SIGSEGV;
 627                 info.si_errno = 0;
 628                 /* XXX: check env->error_code */
 629                 info.si_code = TARGET_SEGV_MAPERR;
 630                 if (trapnr == TT_DFAULT)
 631                     info._sifields._sigfault._addr = env->dmmuregs[4];
 632                 else
 633                     info._sifields._sigfault._addr = env->tsptr->tpc;
 634                 //queue_signal(env, info.si_signo, &info);
 635             }
 636 #endif
 637             break;
 638 #endif
 639         case EXCP_INTERRUPT:
 640             /* just indicate that signals should be handled asap */
 641             break;
 642         case EXCP_DEBUG:
 643             {
 644                 int sig;
 645
 646                 sig = gdb_handlesig(cs, TARGET_SIGTRAP);
 647 #if 0
 648                 if (sig)
 649                   {
 650                     info.si_signo = sig;
 651                     info.si_errno = 0;
 652                     info.si_code = TARGET_TRAP_BRKPT;
 653                     //queue_signal(env, info.si_signo, &info);
 654                   }
 655 #endif
 656             }
 657             break;
 658         default:
 659 #ifdef TARGET_SPARC64
 660         badtrap:
 661 #endif
 662             printf ("Unhandled trap: 0x%x\n", trapnr);
 663             cpu_dump_state(cs, stderr, fprintf, 0);
 664             exit (1);
 665         }
 666         process_pending_signals (env);
 667     }
 668 }
 669
 670 #endif
 671
 672 static void usage(void)
 673 {
 674     printf("qemu-" TARGET_NAME " version " QEMU_VERSION ", Copyright (c) 2003-2008 Fabrice Bellard\n"
 675            "usage: qemu-" TARGET_NAME " [options] program [arguments...]\n"
 676            "BSD CPU emulator (compiled for %s emulation)\n"
 677            "\n"
 678            "Standard options:\n"
 679            "-h                print this help\n"
 680            "-g port           wait gdb connection to port\n"
 681            "-L path           set the elf interpreter prefix (default=%s)\n"
 682            "-s size           set the stack size in bytes (default=%ld)\n"
 683            "-cpu model        select CPU (-cpu help for list)\n"
 684            "-drop-ld-preload  drop LD_PRELOAD for target process\n"
 685            "-E var=value      sets/modifies targets environment variable(s)\n"
 686            "-U var            unsets targets environment variable(s)\n"
 687 #if defined(CONFIG_USE_GUEST_BASE)
 688            "-B address        set guest_base address to address\n"
 689 #endif
 690            "-bsd type         select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n"
 691            "\n"
 692            "Debug options:\n"
 693            "-d item1[,...]    enable logging of specified items\n"
 694            "                  (use '-d help' for a list of log items)\n"
 695            "-D logfile        write logs to 'logfile' (default stderr)\n"
 696            "-p pagesize       set the host page size to 'pagesize'\n"
 697            "-singlestep       always run in singlestep mode\n"
 698            "-strace           log system calls\n"
 699            "\n"
 700            "Environment variables:\n"
 701            "QEMU_STRACE       Print system calls and arguments similar to the\n"
 702            "                  'strace' program.  Enable by setting to any value.\n"
 703            "You can use -E and -U options to set/unset environment variables\n"
 704            "for target process.  It is possible to provide several variables\n"
 705            "by repeating the option.  For example:\n"
 706            "    -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n"
 707            "Note that if you provide several changes to single variable\n"
 708            "last change will stay in effect.\n"
 709            ,
 710            TARGET_NAME,
 711            interp_prefix,
 712            x86_stack_size);
 713     exit(1);
 714 }
 715
 716 THREAD CPUState *thread_cpu;
 717
 718 /* Assumes contents are already zeroed.  */
 719 void init_task_state(TaskState *ts)
 720 {
 721     int i;
 722
 723     ts->used = 1;
 724     ts->first_free = ts->sigqueue_table;
 725     for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) {
 726         ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1];
 727     }
 728     ts->sigqueue_table[i].next = NULL;
 729 }
 730
 731 int main(int argc, char **argv)
 732 {
 733     const char *filename;
 734     const char *cpu_model;
 735     const char *log_file = NULL;
 736     const char *log_mask = NULL;
 737     struct target_pt_regs regs1, *regs = &regs1;
 738     struct image_info info1, *info = &info1;
 739     TaskState ts1, *ts = &ts1;
 740     CPUArchState *env;
 741     CPUState *cpu;
 742     int optind;
 743     const char *r;
 744     int gdbstub_port = 0;
 745     char **target_environ, **wrk;
 746     envlist_t *envlist = NULL;
 747     bsd_type = target_openbsd;
 748
 749     if (argc <= 1)
 750         usage();
 751
 752     module_call_init(MODULE_INIT_QOM);
 753
 754     if ((envlist = envlist_create()) == NULL) {
 755         (void) fprintf(stderr, "Unable to allocate envlist\n");
 756         exit(1);
 757     }
 758
 759     /* add current environment into the list */
 760     for (wrk = environ; *wrk != NULL; wrk++) {
 761         (void) envlist_setenv(envlist, *wrk);
 762     }
 763
 764     cpu_model = NULL;
 765 #if defined(cpudef_setup)
 766     cpudef_setup(); /* parse cpu definitions in target config file (TBD) */
 767 #endif
 768
 769     optind = 1;
 770     for(;;) {
 771         if (optind >= argc)
 772             break;
 773         r = argv[optind];
 774         if (r[0] != '-')
 775             break;
 776         optind++;
 777         r++;
 778         if (!strcmp(r, "-")) {
 779             break;
 780         } else if (!strcmp(r, "d")) {
 781             if (optind >= argc) {
 782                 break;
 783             }
 784             log_mask = argv[optind++];
 785         } else if (!strcmp(r, "D")) {
 786             if (optind >= argc) {
 787                 break;
 788             }
 789             log_file = argv[optind++];
 790         } else if (!strcmp(r, "E")) {
 791             r = argv[optind++];
 792             if (envlist_setenv(envlist, r) != 0)
 793                 usage();
 794         } else if (!strcmp(r, "ignore-environment")) {
 795             envlist_free(envlist);
 796             if ((envlist = envlist_create()) == NULL) {
 797                 (void) fprintf(stderr, "Unable to allocate envlist\n");
 798                 exit(1);
 799             }
 800         } else if (!strcmp(r, "U")) {
 801             r = argv[optind++];
 802             if (envlist_unsetenv(envlist, r) != 0)
 803                 usage();
 804         } else if (!strcmp(r, "s")) {
 805             r = argv[optind++];
 806             x86_stack_size = strtol(r, (char **)&r, 0);
 807             if (x86_stack_size <= 0)
 808                 usage();
 809             if (*r == 'M')
 810                 x86_stack_size *= 1024 * 1024;
 811             else if (*r == 'k' || *r == 'K')
 812                 x86_stack_size *= 1024;
 813         } else if (!strcmp(r, "L")) {
 814             interp_prefix = argv[optind++];
 815         } else if (!strcmp(r, "p")) {
 816             qemu_host_page_size = atoi(argv[optind++]);
 817             if (qemu_host_page_size == 0 ||
 818                 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
 819                 fprintf(stderr, "page size must be a power of two\n");
 820                 exit(1);
 821             }
 822         } else if (!strcmp(r, "g")) {
 823             gdbstub_port = atoi(argv[optind++]);
 824         } else if (!strcmp(r, "r")) {
 825             qemu_uname_release = argv[optind++];
 826         } else if (!strcmp(r, "cpu")) {
 827             cpu_model = argv[optind++];
 828             if (is_help_option(cpu_model)) {
 829 /* XXX: implement xxx_cpu_list for targets that still miss it */
 830 #if defined(cpu_list)
 831                     cpu_list(stdout, &fprintf);
 832 #endif
 833                 exit(1);
 834             }
 835 #if defined(CONFIG_USE_GUEST_BASE)
 836         } else if (!strcmp(r, "B")) {
 837            guest_base = strtol(argv[optind++], NULL, 0);
 838            have_guest_base = 1;
 839 #endif
 840         } else if (!strcmp(r, "drop-ld-preload")) {
 841             (void) envlist_unsetenv(envlist, "LD_PRELOAD");
 842         } else if (!strcmp(r, "bsd")) {
 843             if (!strcasecmp(argv[optind], "freebsd")) {
 844                 bsd_type = target_freebsd;
 845             } else if (!strcasecmp(argv[optind], "netbsd")) {
 846                 bsd_type = target_netbsd;
 847             } else if (!strcasecmp(argv[optind], "openbsd")) {
 848                 bsd_type = target_openbsd;
 849             } else {
 850                 usage();
 851             }
 852             optind++;
 853         } else if (!strcmp(r, "singlestep")) {
 854             singlestep = 1;
 855         } else if (!strcmp(r, "strace")) {
 856             do_strace = 1;
 857         } else
 858         {
 859             usage();
 860         }
 861     }
 862
 863     /* init debug */
 864     qemu_set_log_filename(log_file);
 865     if (log_mask) {
 866         int mask;
 867
 868         mask = qemu_str_to_log_mask(log_mask);
 869         if (!mask) {
 870             qemu_print_log_usage(stdout);
 871             exit(1);
 872         }
 873         qemu_set_log(mask);
 874     }
 875
 876     if (optind >= argc) {
 877         usage();
 878     }
 879     filename = argv[optind];
 880
 881     /* Zero out regs */
 882     memset(regs, 0, sizeof(struct target_pt_regs));
 883
 884     /* Zero out image_info */
 885     memset(info, 0, sizeof(struct image_info));
 886
 887     /* Scan interp_prefix dir for replacement files. */
 888     init_paths(interp_prefix);
 889
 890     if (cpu_model == NULL) {
 891 #if defined(TARGET_I386)
 892 #ifdef TARGET_X86_64
 893         cpu_model = "qemu64";
 894 #else
 895         cpu_model = "qemu32";
 896 #endif
 897 #elif defined(TARGET_SPARC)
 898 #ifdef TARGET_SPARC64
 899         cpu_model = "TI UltraSparc II";
 900 #else
 901         cpu_model = "Fujitsu MB86904";
 902 #endif
 903 #else
 904         cpu_model = "any";
 905 #endif
 906     }
 907     tcg_exec_init(0);
 908     cpu_exec_init_all();
 909     /* NOTE: we need to init the CPU at this stage to get
 910        qemu_host_page_size */
 911     env = cpu_init(cpu_model);
 912     if (!env) {
 913         fprintf(stderr, "Unable to find CPU definition\n");
 914         exit(1);
 915     }
 916     cpu = ENV_GET_CPU(env);
 917 #if defined(TARGET_SPARC) || defined(TARGET_PPC)
 918     cpu_reset(cpu);
 919 #endif
 920     thread_cpu = cpu;
 921
 922     if (getenv("QEMU_STRACE")) {
 923         do_strace = 1;
 924     }
 925
 926     target_environ = envlist_to_environ(envlist, NULL);
 927     envlist_free(envlist);
 928
 929 #if defined(CONFIG_USE_GUEST_BASE)
 930     /*
 931      * Now that page sizes are configured in cpu_init() we can do
 932      * proper page alignment for guest_base.
 933      */
 934     guest_base = HOST_PAGE_ALIGN(guest_base);
 935
 936     /*
 937      * Read in mmap_min_addr kernel parameter.  This value is used
 938      * When loading the ELF image to determine whether guest_base
 939      * is needed.
 940      *
 941      * When user has explicitly set the quest base, we skip this
 942      * test.
 943      */
 944     if (!have_guest_base) {
 945         FILE *fp;
 946
 947         if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) {
 948             unsigned long tmp;
 949             if (fscanf(fp, "%lu", &tmp) == 1) {
 950                 mmap_min_addr = tmp;
 951                 qemu_log("host mmap_min_addr=0x%lx\n", mmap_min_addr);
 952             }
 953             fclose(fp);
 954         }
 955     }
 956 #endif /* CONFIG_USE_GUEST_BASE */
 957
 958     if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) {
 959         printf("Error loading %s\n", filename);
 960         _exit(1);
 961     }
 962
 963     for (wrk = target_environ; *wrk; wrk++) {
 964         free(*wrk);
 965     }
 966
 967     free(target_environ);
 968
 969     if (qemu_log_enabled()) {
 970 #if defined(CONFIG_USE_GUEST_BASE)
 971         qemu_log("guest_base  0x%lx\n", guest_base);
 972 #endif
 973         log_page_dump();
 974
 975         qemu_log("start_brk   0x" TARGET_ABI_FMT_lx "\n", info->start_brk);
 976         qemu_log("end_code    0x" TARGET_ABI_FMT_lx "\n", info->end_code);
 977         qemu_log("start_code  0x" TARGET_ABI_FMT_lx "\n",
 978                  info->start_code);
 979         qemu_log("start_data  0x" TARGET_ABI_FMT_lx "\n",
 980                  info->start_data);
 981         qemu_log("end_data    0x" TARGET_ABI_FMT_lx "\n", info->end_data);
 982         qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n",
 983                  info->start_stack);
 984         qemu_log("brk         0x" TARGET_ABI_FMT_lx "\n", info->brk);
 985         qemu_log("entry       0x" TARGET_ABI_FMT_lx "\n", info->entry);
 986     }
 987
 988     target_set_brk(info->brk);
 989     syscall_init();
 990     signal_init();
 991
 992 #if defined(CONFIG_USE_GUEST_BASE)
 993     /* Now that we've loaded the binary, GUEST_BASE is fixed.  Delay
 994        generating the prologue until now so that the prologue can take
 995        the real value of GUEST_BASE into account.  */
 996     tcg_prologue_init(&tcg_ctx);
 997 #endif
 998
 999     /* build Task State */
1000     memset(ts, 0, sizeof(TaskState));
1001     init_task_state(ts);
1002     ts->info = info;
1003     cpu->opaque = ts;
1004
1005 #if defined(TARGET_I386)
1006     env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
1007     env->hflags |= HF_PE_MASK | HF_CPL_MASK;
1008     if (env->features[FEAT_1_EDX] & CPUID_SSE) {
1009         env->cr[4] |= CR4_OSFXSR_MASK;
1010         env->hflags |= HF_OSFXSR_MASK;
1011     }
1012 #ifndef TARGET_ABI32
1013     /* enable 64 bit mode if possible */
1014     if (!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM)) {
1015         fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n");
1016         exit(1);
1017     }
1018     env->cr[4] |= CR4_PAE_MASK;
1019     env->efer |= MSR_EFER_LMA | MSR_EFER_LME;
1020     env->hflags |= HF_LMA_MASK;
1021 #endif
1022
1023     /* flags setup : we activate the IRQs by default as in user mode */
1024     env->eflags |= IF_MASK;
1025
1026     /* linux register setup */
1027 #ifndef TARGET_ABI32
1028     env->regs[R_EAX] = regs->rax;
1029     env->regs[R_EBX] = regs->rbx;
1030     env->regs[R_ECX] = regs->rcx;
1031     env->regs[R_EDX] = regs->rdx;
1032     env->regs[R_ESI] = regs->rsi;
1033     env->regs[R_EDI] = regs->rdi;
1034     env->regs[R_EBP] = regs->rbp;
1035     env->regs[R_ESP] = regs->rsp;
1036     env->eip = regs->rip;
1037 #else
1038     env->regs[R_EAX] = regs->eax;
1039     env->regs[R_EBX] = regs->ebx;
1040     env->regs[R_ECX] = regs->ecx;
1041     env->regs[R_EDX] = regs->edx;
1042     env->regs[R_ESI] = regs->esi;
1043     env->regs[R_EDI] = regs->edi;
1044     env->regs[R_EBP] = regs->ebp;
1045     env->regs[R_ESP] = regs->esp;
1046     env->eip = regs->eip;
1047 #endif
1048
1049     /* linux interrupt setup */
1050 #ifndef TARGET_ABI32
1051     env->idt.limit = 511;
1052 #else
1053     env->idt.limit = 255;
1054 #endif
1055     env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1),
1056                                 PROT_READ|PROT_WRITE,
1057                                 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1058     idt_table = g2h(env->idt.base);
1059     set_idt(0, 0);
1060     set_idt(1, 0);
1061     set_idt(2, 0);
1062     set_idt(3, 3);
1063     set_idt(4, 3);
1064     set_idt(5, 0);
1065     set_idt(6, 0);
1066     set_idt(7, 0);
1067     set_idt(8, 0);
1068     set_idt(9, 0);
1069     set_idt(10, 0);
1070     set_idt(11, 0);
1071     set_idt(12, 0);
1072     set_idt(13, 0);
1073     set_idt(14, 0);
1074     set_idt(15, 0);
1075     set_idt(16, 0);
1076     set_idt(17, 0);
1077     set_idt(18, 0);
1078     set_idt(19, 0);
1079     set_idt(0x80, 3);
1080
1081     /* linux segment setup */
1082     {
1083         uint64_t *gdt_table;
1084         env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES,
1085                                     PROT_READ|PROT_WRITE,
1086                                     MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1087         env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1;
1088         gdt_table = g2h(env->gdt.base);
1089 #ifdef TARGET_ABI32
1090         write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1091                  DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1092                  (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1093 #else
1094         /* 64 bit code segment */
1095         write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1096                  DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1097                  DESC_L_MASK |
1098                  (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1099 #endif
1100         write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff,
1101                  DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1102                  (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
1103     }
1104
1105     cpu_x86_load_seg(env, R_CS, __USER_CS);
1106     cpu_x86_load_seg(env, R_SS, __USER_DS);
1107 #ifdef TARGET_ABI32
1108     cpu_x86_load_seg(env, R_DS, __USER_DS);
1109     cpu_x86_load_seg(env, R_ES, __USER_DS);
1110     cpu_x86_load_seg(env, R_FS, __USER_DS);
1111     cpu_x86_load_seg(env, R_GS, __USER_DS);
1112     /* This hack makes Wine work... */
1113     env->segs[R_FS].selector = 0;
1114 #else
1115     cpu_x86_load_seg(env, R_DS, 0);
1116     cpu_x86_load_seg(env, R_ES, 0);
1117     cpu_x86_load_seg(env, R_FS, 0);
1118     cpu_x86_load_seg(env, R_GS, 0);
1119 #endif
1120 #elif defined(TARGET_SPARC)
1121     {
1122         int i;
1123         env->pc = regs->pc;
1124         env->npc = regs->npc;
1125         env->y = regs->y;
1126         for(i = 0; i < 8; i++)
1127             env->gregs[i] = regs->u_regs[i];
1128         for(i = 0; i < 8; i++)
1129             env->regwptr[i] = regs->u_regs[i + 8];
1130     }
1131 #else
1132 #error unsupported target CPU
1133 #endif
1134
1135     if (gdbstub_port) {
1136         gdbserver_start (gdbstub_port);
1137         gdb_handlesig(cpu, 0);
1138     }
1139     cpu_loop(env);
1140     /* never exits */
1141     return 0;
1142 }