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
  20 #include "qemu/osdep.h"
  21 #include "qemu-common.h"
  22 #include "qemu/units.h"
  23 #include "qemu/accel.h"
  24 #include "sysemu/tcg.h"
  25 #include "qemu-version.h"
  26 #include <machine/trap.h>
  27
  28 #include "qapi/error.h"
  29 #include "qemu.h"
  30 #include "qemu/config-file.h"
  31 #include "qemu/error-report.h"
  32 #include "qemu/path.h"
  33 #include "qemu/help_option.h"
  34 #include "qemu/module.h"
  35 #include "exec/exec-all.h"
  36 #include "tcg/tcg.h"
  37 #include "qemu/timer.h"
  38 #include "qemu/envlist.h"
  39 #include "exec/log.h"
  40 #include "trace/control.h"
  41
  42 int singlestep;
  43 unsigned long mmap_min_addr;
  44 uintptr_t guest_base;
  45 bool have_guest_base;
  46 unsigned long reserved_va;
  47
  48 static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX;
  49 const char *qemu_uname_release;
  50 extern char **environ;
  51 enum BSDType bsd_type;
  52
  53 /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
  54    we allocate a bigger stack. Need a better solution, for example
  55    by remapping the process stack directly at the right place */
  56 unsigned long x86_stack_size = 512 * 1024;
  57
  58 void gemu_log(const char *fmt, ...)
  59 {
  60     va_list ap;
  61
  62     va_start(ap, fmt);
  63     vfprintf(stderr, fmt, ap);
  64     va_end(ap);
  65 }
  66
  67 #if defined(TARGET_I386)
  68 int cpu_get_pic_interrupt(CPUX86State *env)
  69 {
  70     return -1;
  71 }
  72 #endif
  73
  74 void fork_start(void)
  75 {
  76 }
  77
  78 void fork_end(int child)
  79 {
  80     if (child) {
  81         gdbserver_fork(thread_cpu);
  82     }
  83 }
  84
  85 #ifdef TARGET_I386
  86 /***********************************************************/
  87 /* CPUX86 core interface */
  88
  89 uint64_t cpu_get_tsc(CPUX86State *env)
  90 {
  91     return cpu_get_host_ticks();
  92 }
  93
  94 static void write_dt(void *ptr, unsigned long addr, unsigned long limit,
  95                      int flags)
  96 {
  97     unsigned int e1, e2;
  98     uint32_t *p;
  99     e1 = (addr << 16) | (limit & 0xffff);
 100     e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
 101     e2 |= flags;
 102     p = ptr;
 103     p[0] = tswap32(e1);
 104     p[1] = tswap32(e2);
 105 }
 106
 107 static uint64_t *idt_table;
 108 #ifdef TARGET_X86_64
 109 static void set_gate64(void *ptr, unsigned int type, unsigned int dpl,
 110                        uint64_t addr, unsigned int sel)
 111 {
 112     uint32_t *p, e1, e2;
 113     e1 = (addr & 0xffff) | (sel << 16);
 114     e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
 115     p = ptr;
 116     p[0] = tswap32(e1);
 117     p[1] = tswap32(e2);
 118     p[2] = tswap32(addr >> 32);
 119     p[3] = 0;
 120 }
 121 /* only dpl matters as we do only user space emulation */
 122 static void set_idt(int n, unsigned int dpl)
 123 {
 124     set_gate64(idt_table + n * 2, 0, dpl, 0, 0);
 125 }
 126 #else
 127 static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
 128                      uint32_t addr, unsigned int sel)
 129 {
 130     uint32_t *p, e1, e2;
 131     e1 = (addr & 0xffff) | (sel << 16);
 132     e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
 133     p = ptr;
 134     p[0] = tswap32(e1);
 135     p[1] = tswap32(e2);
 136 }
 137
 138 /* only dpl matters as we do only user space emulation */
 139 static void set_idt(int n, unsigned int dpl)
 140 {
 141     set_gate(idt_table + n, 0, dpl, 0, 0);
 142 }
 143 #endif
 144
 145 void cpu_loop(CPUX86State *env)
 146 {
 147     CPUState *cs = env_cpu(env);
 148     int trapnr;
 149     abi_ulong pc;
 150     //target_siginfo_t info;
 151
 152     for(;;) {
 153         cpu_exec_start(cs);
 154         trapnr = cpu_exec(cs);
 155         cpu_exec_end(cs);
 156         process_queued_cpu_work(cs);
 157
 158         switch(trapnr) {
 159         case 0x80:
 160             /* syscall from int $0x80 */
 161             if (bsd_type == target_freebsd) {
 162                 abi_ulong params = (abi_ulong) env->regs[R_ESP] +
 163                     sizeof(int32_t);
 164                 int32_t syscall_nr = env->regs[R_EAX];
 165                 int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8;
 166
 167                 if (syscall_nr == TARGET_FREEBSD_NR_syscall) {
 168                     get_user_s32(syscall_nr, params);
 169                     params += sizeof(int32_t);
 170                 } else if (syscall_nr == TARGET_FREEBSD_NR___syscall) {
 171                     get_user_s32(syscall_nr, params);
 172                     params += sizeof(int64_t);
 173                 }
 174                 get_user_s32(arg1, params);
 175                 params += sizeof(int32_t);
 176                 get_user_s32(arg2, params);
 177                 params += sizeof(int32_t);
 178                 get_user_s32(arg3, params);
 179                 params += sizeof(int32_t);
 180                 get_user_s32(arg4, params);
 181                 params += sizeof(int32_t);
 182                 get_user_s32(arg5, params);
 183                 params += sizeof(int32_t);
 184                 get_user_s32(arg6, params);
 185                 params += sizeof(int32_t);
 186                 get_user_s32(arg7, params);
 187                 params += sizeof(int32_t);
 188                 get_user_s32(arg8, params);
 189                 env->regs[R_EAX] = do_freebsd_syscall(env,
 190                                                       syscall_nr,
 191                                                       arg1,
 192                                                       arg2,
 193                                                       arg3,
 194                                                       arg4,
 195                                                       arg5,
 196                                                       arg6,
 197                                                       arg7,
 198                                                       arg8);
 199             } else { //if (bsd_type == target_openbsd)
 200                 env->regs[R_EAX] = do_openbsd_syscall(env,
 201                                                       env->regs[R_EAX],
 202                                                       env->regs[R_EBX],
 203                                                       env->regs[R_ECX],
 204                                                       env->regs[R_EDX],
 205                                                       env->regs[R_ESI],
 206                                                       env->regs[R_EDI],
 207                                                       env->regs[R_EBP]);
 208             }
 209             if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) {
 210                 env->regs[R_EAX] = -env->regs[R_EAX];
 211                 env->eflags |= CC_C;
 212             } else {
 213                 env->eflags &= ~CC_C;
 214             }
 215             break;
 216 #ifndef TARGET_ABI32
 217         case EXCP_SYSCALL:
 218             /* syscall from syscall instruction */
 219             if (bsd_type == target_freebsd)
 220                 env->regs[R_EAX] = do_freebsd_syscall(env,
 221                                                       env->regs[R_EAX],
 222                                                       env->regs[R_EDI],
 223                                                       env->regs[R_ESI],
 224                                                       env->regs[R_EDX],
 225                                                       env->regs[R_ECX],
 226                                                       env->regs[8],
 227                                                       env->regs[9], 0, 0);
 228             else { //if (bsd_type == target_openbsd)
 229                 env->regs[R_EAX] = do_openbsd_syscall(env,
 230                                                       env->regs[R_EAX],
 231                                                       env->regs[R_EDI],
 232                                                       env->regs[R_ESI],
 233                                                       env->regs[R_EDX],
 234                                                       env->regs[10],
 235                                                       env->regs[8],
 236                                                       env->regs[9]);
 237             }
 238             env->eip = env->exception_next_eip;
 239             if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) {
 240                 env->regs[R_EAX] = -env->regs[R_EAX];
 241                 env->eflags |= CC_C;
 242             } else {
 243                 env->eflags &= ~CC_C;
 244             }
 245             break;
 246 #endif
 247 #if 0
 248         case EXCP0B_NOSEG:
 249         case EXCP0C_STACK:
 250             info.si_signo = SIGBUS;
 251             info.si_errno = 0;
 252             info.si_code = TARGET_SI_KERNEL;
 253             info._sifields._sigfault._addr = 0;
 254             queue_signal(env, info.si_signo, &info);
 255             break;
 256         case EXCP0D_GPF:
 257             /* XXX: potential problem if ABI32 */
 258 #ifndef TARGET_X86_64
 259             if (env->eflags & VM_MASK) {
 260                 handle_vm86_fault(env);
 261             } else
 262 #endif
 263             {
 264                 info.si_signo = SIGSEGV;
 265                 info.si_errno = 0;
 266                 info.si_code = TARGET_SI_KERNEL;
 267                 info._sifields._sigfault._addr = 0;
 268                 queue_signal(env, info.si_signo, &info);
 269             }
 270             break;
 271         case EXCP0E_PAGE:
 272             info.si_signo = SIGSEGV;
 273             info.si_errno = 0;
 274             if (!(env->error_code & 1))
 275                 info.si_code = TARGET_SEGV_MAPERR;
 276             else
 277                 info.si_code = TARGET_SEGV_ACCERR;
 278             info._sifields._sigfault._addr = env->cr[2];
 279             queue_signal(env, info.si_signo, &info);
 280             break;
 281         case EXCP00_DIVZ:
 282 #ifndef TARGET_X86_64
 283             if (env->eflags & VM_MASK) {
 284                 handle_vm86_trap(env, trapnr);
 285             } else
 286 #endif
 287             {
 288                 /* division by zero */
 289                 info.si_signo = SIGFPE;
 290                 info.si_errno = 0;
 291                 info.si_code = TARGET_FPE_INTDIV;
 292                 info._sifields._sigfault._addr = env->eip;
 293                 queue_signal(env, info.si_signo, &info);
 294             }
 295             break;
 296         case EXCP01_DB:
 297         case EXCP03_INT3:
 298 #ifndef TARGET_X86_64
 299             if (env->eflags & VM_MASK) {
 300                 handle_vm86_trap(env, trapnr);
 301             } else
 302 #endif
 303             {
 304                 info.si_signo = SIGTRAP;
 305                 info.si_errno = 0;
 306                 if (trapnr == EXCP01_DB) {
 307                     info.si_code = TARGET_TRAP_BRKPT;
 308                     info._sifields._sigfault._addr = env->eip;
 309                 } else {
 310                     info.si_code = TARGET_SI_KERNEL;
 311                     info._sifields._sigfault._addr = 0;
 312                 }
 313                 queue_signal(env, info.si_signo, &info);
 314             }
 315             break;
 316         case EXCP04_INTO:
 317         case EXCP05_BOUND:
 318 #ifndef TARGET_X86_64
 319             if (env->eflags & VM_MASK) {
 320                 handle_vm86_trap(env, trapnr);
 321             } else
 322 #endif
 323             {
 324                 info.si_signo = SIGSEGV;
 325                 info.si_errno = 0;
 326                 info.si_code = TARGET_SI_KERNEL;
 327                 info._sifields._sigfault._addr = 0;
 328                 queue_signal(env, info.si_signo, &info);
 329             }
 330             break;
 331         case EXCP06_ILLOP:
 332             info.si_signo = SIGILL;
 333             info.si_errno = 0;
 334             info.si_code = TARGET_ILL_ILLOPN;
 335             info._sifields._sigfault._addr = env->eip;
 336             queue_signal(env, info.si_signo, &info);
 337             break;
 338 #endif
 339         case EXCP_INTERRUPT:
 340             /* just indicate that signals should be handled asap */
 341             break;
 342 #if 0
 343         case EXCP_DEBUG:
 344             {
 345                 int sig;
 346
 347                 sig = gdb_handlesig (env, TARGET_SIGTRAP);
 348                 if (sig)
 349                   {
 350                     info.si_signo = sig;
 351                     info.si_errno = 0;
 352                     info.si_code = TARGET_TRAP_BRKPT;
 353                     queue_signal(env, info.si_signo, &info);
 354                   }
 355             }
 356             break;
 357 #endif
 358         default:
 359             pc = env->segs[R_CS].base + env->eip;
 360             fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
 361                     (long)pc, trapnr);
 362             abort();
 363         }
 364         process_pending_signals(env);
 365     }
 366 }
 367 #endif
 368
 369 #ifdef TARGET_SPARC
 370 #define SPARC64_STACK_BIAS 2047
 371
 372 //#define DEBUG_WIN
 373 /* WARNING: dealing with register windows _is_ complicated. More info
 374    can be found at http://www.sics.se/~psm/sparcstack.html */
 375 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index)
 376 {
 377     index = (index + cwp * 16) % (16 * env->nwindows);
 378     /* wrap handling : if cwp is on the last window, then we use the
 379        registers 'after' the end */
 380     if (index < 8 && env->cwp == env->nwindows - 1)
 381         index += 16 * env->nwindows;
 382     return index;
 383 }
 384
 385 /* save the register window 'cwp1' */
 386 static inline void save_window_offset(CPUSPARCState *env, int cwp1)
 387 {
 388     unsigned int i;
 389     abi_ulong sp_ptr;
 390
 391     sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
 392 #ifdef TARGET_SPARC64
 393     if (sp_ptr & 3)
 394         sp_ptr += SPARC64_STACK_BIAS;
 395 #endif
 396 #if defined(DEBUG_WIN)
 397     printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n",
 398            sp_ptr, cwp1);
 399 #endif
 400     for(i = 0; i < 16; i++) {
 401         /* FIXME - what to do if put_user() fails? */
 402         put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
 403         sp_ptr += sizeof(abi_ulong);
 404     }
 405 }
 406
 407 static void save_window(CPUSPARCState *env)
 408 {
 409 #ifndef TARGET_SPARC64
 410     unsigned int new_wim;
 411     new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) &
 412         ((1LL << env->nwindows) - 1);
 413     save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
 414     env->wim = new_wim;
 415 #else
 416     /*
 417      * cansave is zero if the spill trap handler is triggered by `save` and
 418      * nonzero if triggered by a `flushw`
 419      */
 420     save_window_offset(env, cpu_cwp_dec(env, env->cwp - env->cansave - 2));
 421     env->cansave++;
 422     env->canrestore--;
 423 #endif
 424 }
 425
 426 static void restore_window(CPUSPARCState *env)
 427 {
 428 #ifndef TARGET_SPARC64
 429     unsigned int new_wim;
 430 #endif
 431     unsigned int i, cwp1;
 432     abi_ulong sp_ptr;
 433
 434 #ifndef TARGET_SPARC64
 435     new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) &
 436         ((1LL << env->nwindows) - 1);
 437 #endif
 438
 439     /* restore the invalid window */
 440     cwp1 = cpu_cwp_inc(env, env->cwp + 1);
 441     sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
 442 #ifdef TARGET_SPARC64
 443     if (sp_ptr & 3)
 444         sp_ptr += SPARC64_STACK_BIAS;
 445 #endif
 446 #if defined(DEBUG_WIN)
 447     printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n",
 448            sp_ptr, cwp1);
 449 #endif
 450     for(i = 0; i < 16; i++) {
 451         /* FIXME - what to do if get_user() fails? */
 452         get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
 453         sp_ptr += sizeof(abi_ulong);
 454     }
 455 #ifdef TARGET_SPARC64
 456     env->canrestore++;
 457     if (env->cleanwin < env->nwindows - 1)
 458         env->cleanwin++;
 459     env->cansave--;
 460 #else
 461     env->wim = new_wim;
 462 #endif
 463 }
 464
 465 static void flush_windows(CPUSPARCState *env)
 466 {
 467     int offset, cwp1;
 468
 469     offset = 1;
 470     for(;;) {
 471         /* if restore would invoke restore_window(), then we can stop */
 472         cwp1 = cpu_cwp_inc(env, env->cwp + offset);
 473 #ifndef TARGET_SPARC64
 474         if (env->wim & (1 << cwp1))
 475             break;
 476 #else
 477         if (env->canrestore == 0)
 478             break;
 479         env->cansave++;
 480         env->canrestore--;
 481 #endif
 482         save_window_offset(env, cwp1);
 483         offset++;
 484     }
 485     cwp1 = cpu_cwp_inc(env, env->cwp + 1);
 486 #ifndef TARGET_SPARC64
 487     /* set wim so that restore will reload the registers */
 488     env->wim = 1 << cwp1;
 489 #endif
 490 #if defined(DEBUG_WIN)
 491     printf("flush_windows: nb=%d\n", offset - 1);
 492 #endif
 493 }
 494
 495 void cpu_loop(CPUSPARCState *env)
 496 {
 497     CPUState *cs = env_cpu(env);
 498     int trapnr, ret, syscall_nr;
 499     //target_siginfo_t info;
 500
 501     while (1) {
 502         cpu_exec_start(cs);
 503         trapnr = cpu_exec(cs);
 504         cpu_exec_end(cs);
 505         process_queued_cpu_work(cs);
 506
 507         switch (trapnr) {
 508 #ifndef TARGET_SPARC64
 509         case 0x80:
 510 #else
 511         /* FreeBSD uses 0x141 for syscalls too */
 512         case 0x141:
 513             if (bsd_type != target_freebsd)
 514                 goto badtrap;
 515             /* fallthrough */
 516         case 0x100:
 517 #endif
 518             syscall_nr = env->gregs[1];
 519             if (bsd_type == target_freebsd)
 520                 ret = do_freebsd_syscall(env, syscall_nr,
 521                                          env->regwptr[0], env->regwptr[1],
 522                                          env->regwptr[2], env->regwptr[3],
 523                                          env->regwptr[4], env->regwptr[5], 0, 0);
 524             else if (bsd_type == target_netbsd)
 525                 ret = do_netbsd_syscall(env, syscall_nr,
 526                                         env->regwptr[0], env->regwptr[1],
 527                                         env->regwptr[2], env->regwptr[3],
 528                                         env->regwptr[4], env->regwptr[5]);
 529             else { //if (bsd_type == target_openbsd)
 530 #if defined(TARGET_SPARC64)
 531                 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG |
 532                                 TARGET_OPENBSD_SYSCALL_G2RFLAG);
 533 #endif
 534                 ret = do_openbsd_syscall(env, syscall_nr,
 535                                          env->regwptr[0], env->regwptr[1],
 536                                          env->regwptr[2], env->regwptr[3],
 537                                          env->regwptr[4], env->regwptr[5]);
 538             }
 539             if ((unsigned int)ret >= (unsigned int)(-515)) {
 540                 ret = -ret;
 541 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
 542                 env->xcc |= PSR_CARRY;
 543 #else
 544                 env->psr |= PSR_CARRY;
 545 #endif
 546             } else {
 547 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
 548                 env->xcc &= ~PSR_CARRY;
 549 #else
 550                 env->psr &= ~PSR_CARRY;
 551 #endif
 552             }
 553             env->regwptr[0] = ret;
 554             /* next instruction */
 555 #if defined(TARGET_SPARC64)
 556             if (bsd_type == target_openbsd &&
 557                 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) {
 558                 env->pc = env->gregs[2];
 559                 env->npc = env->pc + 4;
 560             } else if (bsd_type == target_openbsd &&
 561                        env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) {
 562                 env->pc = env->gregs[7];
 563                 env->npc = env->pc + 4;
 564             } else {
 565                 env->pc = env->npc;
 566                 env->npc = env->npc + 4;
 567             }
 568 #else
 569             env->pc = env->npc;
 570             env->npc = env->npc + 4;
 571 #endif
 572             break;
 573         case 0x83: /* flush windows */
 574 #ifdef TARGET_ABI32
 575         case 0x103:
 576 #endif
 577             flush_windows(env);
 578             /* next instruction */
 579             env->pc = env->npc;
 580             env->npc = env->npc + 4;
 581             break;
 582 #ifndef TARGET_SPARC64
 583         case TT_WIN_OVF: /* window overflow */
 584             save_window(env);
 585             break;
 586         case TT_WIN_UNF: /* window underflow */
 587             restore_window(env);
 588             break;
 589         case TT_TFAULT:
 590         case TT_DFAULT:
 591 #if 0
 592             {
 593                 info.si_signo = SIGSEGV;
 594                 info.si_errno = 0;
 595                 /* XXX: check env->error_code */
 596                 info.si_code = TARGET_SEGV_MAPERR;
 597                 info._sifields._sigfault._addr = env->mmuregs[4];
 598                 queue_signal(env, info.si_signo, &info);
 599             }
 600 #endif
 601             break;
 602 #else
 603         case TT_SPILL: /* window overflow */
 604             save_window(env);
 605             break;
 606         case TT_FILL: /* window underflow */
 607             restore_window(env);
 608             break;
 609         case TT_TFAULT:
 610         case TT_DFAULT:
 611 #if 0
 612             {
 613                 info.si_signo = SIGSEGV;
 614                 info.si_errno = 0;
 615                 /* XXX: check env->error_code */
 616                 info.si_code = TARGET_SEGV_MAPERR;
 617                 if (trapnr == TT_DFAULT)
 618                     info._sifields._sigfault._addr = env->dmmuregs[4];
 619                 else
 620                     info._sifields._sigfault._addr = env->tsptr->tpc;
 621                 //queue_signal(env, info.si_signo, &info);
 622             }
 623 #endif
 624             break;
 625 #endif
 626         case EXCP_INTERRUPT:
 627             /* just indicate that signals should be handled asap */
 628             break;
 629         case EXCP_DEBUG:
 630             {
 631 #if 0
 632                 int sig =
 633 #endif
 634                 gdb_handlesig(cs, TARGET_SIGTRAP);
 635 #if 0
 636                 if (sig)
 637                   {
 638                     info.si_signo = sig;
 639                     info.si_errno = 0;
 640                     info.si_code = TARGET_TRAP_BRKPT;
 641                     //queue_signal(env, info.si_signo, &info);
 642                   }
 643 #endif
 644             }
 645             break;
 646         default:
 647 #ifdef TARGET_SPARC64
 648         badtrap:
 649 #endif
 650             printf ("Unhandled trap: 0x%x\n", trapnr);
 651             cpu_dump_state(cs, stderr, 0);
 652             exit (1);
 653         }
 654         process_pending_signals (env);
 655     }
 656 }
 657
 658 #endif
 659
 660 static void usage(void)
 661 {
 662     printf("qemu-" TARGET_NAME " version " QEMU_FULL_VERSION
 663            "\n" QEMU_COPYRIGHT "\n"
 664            "usage: qemu-" TARGET_NAME " [options] program [arguments...]\n"
 665            "BSD CPU emulator (compiled for %s emulation)\n"
 666            "\n"
 667            "Standard options:\n"
 668            "-h                print this help\n"
 669            "-g port           wait gdb connection to port\n"
 670            "-L path           set the elf interpreter prefix (default=%s)\n"
 671            "-s size           set the stack size in bytes (default=%ld)\n"
 672            "-cpu model        select CPU (-cpu help for list)\n"
 673            "-drop-ld-preload  drop LD_PRELOAD for target process\n"
 674            "-E var=value      sets/modifies targets environment variable(s)\n"
 675            "-U var            unsets targets environment variable(s)\n"
 676            "-B address        set guest_base address to address\n"
 677            "-bsd type         select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n"
 678            "\n"
 679            "Debug options:\n"
 680            "-d item1[,...]    enable logging of specified items\n"
 681            "                  (use '-d help' for a list of log items)\n"
 682            "-D logfile        write logs to 'logfile' (default stderr)\n"
 683            "-p pagesize       set the host page size to 'pagesize'\n"
 684            "-singlestep       always run in singlestep mode\n"
 685            "-strace           log system calls\n"
 686            "-trace            [[enable=]<pattern>][,events=<file>][,file=<file>]\n"
 687            "                  specify tracing options\n"
 688            "\n"
 689            "Environment variables:\n"
 690            "QEMU_STRACE       Print system calls and arguments similar to the\n"
 691            "                  'strace' program.  Enable by setting to any value.\n"
 692            "You can use -E and -U options to set/unset environment variables\n"
 693            "for target process.  It is possible to provide several variables\n"
 694            "by repeating the option.  For example:\n"
 695            "    -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n"
 696            "Note that if you provide several changes to single variable\n"
 697            "last change will stay in effect.\n"
 698            "\n"
 699            QEMU_HELP_BOTTOM "\n"
 700            ,
 701            TARGET_NAME,
 702            interp_prefix,
 703            x86_stack_size);
 704     exit(1);
 705 }
 706
 707 THREAD CPUState *thread_cpu;
 708
 709 bool qemu_cpu_is_self(CPUState *cpu)
 710 {
 711     return thread_cpu == cpu;
 712 }
 713
 714 void qemu_cpu_kick(CPUState *cpu)
 715 {
 716     cpu_exit(cpu);
 717 }
 718
 719 /* Assumes contents are already zeroed.  */
 720 void init_task_state(TaskState *ts)
 721 {
 722     int i;
 723
 724     ts->used = 1;
 725     ts->first_free = ts->sigqueue_table;
 726     for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) {
 727         ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1];
 728     }
 729     ts->sigqueue_table[i].next = NULL;
 730 }
 731
 732 int main(int argc, char **argv)
 733 {
 734     const char *filename;
 735     const char *cpu_model;
 736     const char *cpu_type;
 737     const char *log_file = NULL;
 738     const char *log_mask = NULL;
 739     struct target_pt_regs regs1, *regs = &regs1;
 740     struct image_info info1, *info = &info1;
 741     TaskState ts1, *ts = &ts1;
 742     CPUArchState *env;
 743     CPUState *cpu;
 744     int optind;
 745     const char *r;
 746     const char *gdbstub = NULL;
 747     char **target_environ, **wrk;
 748     envlist_t *envlist = NULL;
 749     bsd_type = target_openbsd;
 750
 751     if (argc <= 1)
 752         usage();
 753
 754     error_init(argv[0]);
 755     module_call_init(MODULE_INIT_TRACE);
 756     qemu_init_cpu_list();
 757     module_call_init(MODULE_INIT_QOM);
 758
 759     envlist = envlist_create();
 760
 761     /* add current environment into the list */
 762     for (wrk = environ; *wrk != NULL; wrk++) {
 763         (void) envlist_setenv(envlist, *wrk);
 764     }
 765
 766     cpu_model = NULL;
 767
 768     qemu_add_opts(&qemu_trace_opts);
 769
 770     optind = 1;
 771     for (;;) {
 772         if (optind >= argc)
 773             break;
 774         r = argv[optind];
 775         if (r[0] != '-')
 776             break;
 777         optind++;
 778         r++;
 779         if (!strcmp(r, "-")) {
 780             break;
 781         } else if (!strcmp(r, "d")) {
 782             if (optind >= argc) {
 783                 break;
 784             }
 785             log_mask = argv[optind++];
 786         } else if (!strcmp(r, "D")) {
 787             if (optind >= argc) {
 788                 break;
 789             }
 790             log_file = argv[optind++];
 791         } else if (!strcmp(r, "E")) {
 792             r = argv[optind++];
 793             if (envlist_setenv(envlist, r) != 0)
 794                 usage();
 795         } else if (!strcmp(r, "ignore-environment")) {
 796             envlist_free(envlist);
 797             envlist = envlist_create();
 798         } else if (!strcmp(r, "U")) {
 799             r = argv[optind++];
 800             if (envlist_unsetenv(envlist, r) != 0)
 801                 usage();
 802         } else if (!strcmp(r, "s")) {
 803             r = argv[optind++];
 804             x86_stack_size = strtol(r, (char **)&r, 0);
 805             if (x86_stack_size <= 0)
 806                 usage();
 807             if (*r == 'M')
 808                 x86_stack_size *= MiB;
 809             else if (*r == 'k' || *r == 'K')
 810                 x86_stack_size *= KiB;
 811         } else if (!strcmp(r, "L")) {
 812             interp_prefix = argv[optind++];
 813         } else if (!strcmp(r, "p")) {
 814             qemu_host_page_size = atoi(argv[optind++]);
 815             if (qemu_host_page_size == 0 ||
 816                 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
 817                 fprintf(stderr, "page size must be a power of two\n");
 818                 exit(1);
 819             }
 820         } else if (!strcmp(r, "g")) {
 821             gdbstub = g_strdup(argv[optind++]);
 822         } else if (!strcmp(r, "r")) {
 823             qemu_uname_release = argv[optind++];
 824         } else if (!strcmp(r, "cpu")) {
 825             cpu_model = argv[optind++];
 826             if (is_help_option(cpu_model)) {
 827 /* XXX: implement xxx_cpu_list for targets that still miss it */
 828 #if defined(cpu_list)
 829                     cpu_list();
 830 #endif
 831                 exit(1);
 832             }
 833         } else if (!strcmp(r, "B")) {
 834            guest_base = strtol(argv[optind++], NULL, 0);
 835            have_guest_base = true;
 836         } else if (!strcmp(r, "drop-ld-preload")) {
 837             (void) envlist_unsetenv(envlist, "LD_PRELOAD");
 838         } else if (!strcmp(r, "bsd")) {
 839             if (!strcasecmp(argv[optind], "freebsd")) {
 840                 bsd_type = target_freebsd;
 841             } else if (!strcasecmp(argv[optind], "netbsd")) {
 842                 bsd_type = target_netbsd;
 843             } else if (!strcasecmp(argv[optind], "openbsd")) {
 844                 bsd_type = target_openbsd;
 845             } else {
 846                 usage();
 847             }
 848             optind++;
 849         } else if (!strcmp(r, "singlestep")) {
 850             singlestep = 1;
 851         } else if (!strcmp(r, "strace")) {
 852             do_strace = 1;
 853         } else if (!strcmp(r, "trace")) {
 854             trace_opt_parse(optarg);
 855         } else {
 856             usage();
 857         }
 858     }
 859
 860     /* init debug */
 861     qemu_log_needs_buffers();
 862     qemu_set_log_filename(log_file, &error_fatal);
 863     if (log_mask) {
 864         int mask;
 865
 866         mask = qemu_str_to_log_mask(log_mask);
 867         if (!mask) {
 868             qemu_print_log_usage(stdout);
 869             exit(1);
 870         }
 871         qemu_set_log(mask);
 872     }
 873
 874     if (optind >= argc) {
 875         usage();
 876     }
 877     filename = argv[optind];
 878
 879     if (!trace_init_backends()) {
 880         exit(1);
 881     }
 882     trace_init_file();
 883
 884     /* Zero out regs */
 885     memset(regs, 0, sizeof(struct target_pt_regs));
 886
 887     /* Zero out image_info */
 888     memset(info, 0, sizeof(struct image_info));
 889
 890     /* Scan interp_prefix dir for replacement files. */
 891     init_paths(interp_prefix);
 892
 893     if (cpu_model == NULL) {
 894 #if defined(TARGET_I386)
 895 #ifdef TARGET_X86_64
 896         cpu_model = "qemu64";
 897 #else
 898         cpu_model = "qemu32";
 899 #endif
 900 #elif defined(TARGET_SPARC)
 901 #ifdef TARGET_SPARC64
 902         cpu_model = "TI UltraSparc II";
 903 #else
 904         cpu_model = "Fujitsu MB86904";
 905 #endif
 906 #else
 907         cpu_model = "any";
 908 #endif
 909     }
 910
 911     cpu_type = parse_cpu_option(cpu_model);
 912     /* init tcg before creating CPUs and to get qemu_host_page_size */
 913     {
 914         AccelClass *ac = ACCEL_GET_CLASS(current_accel());
 915
 916         accel_init_interfaces(ac);
 917         ac->init_machine(NULL);
 918     }
 919     cpu = cpu_create(cpu_type);
 920     env = cpu->env_ptr;
 921 #if defined(TARGET_SPARC) || defined(TARGET_PPC)
 922     cpu_reset(cpu);
 923 #endif
 924     thread_cpu = cpu;
 925
 926     if (getenv("QEMU_STRACE")) {
 927         do_strace = 1;
 928     }
 929
 930     target_environ = envlist_to_environ(envlist, NULL);
 931     envlist_free(envlist);
 932
 933     /*
 934      * Now that page sizes are configured in tcg_exec_init() we can do
 935      * proper page alignment for guest_base.
 936      */
 937     guest_base = HOST_PAGE_ALIGN(guest_base);
 938
 939     /*
 940      * Read in mmap_min_addr kernel parameter.  This value is used
 941      * When loading the ELF image to determine whether guest_base
 942      * is needed.
 943      *
 944      * When user has explicitly set the quest base, we skip this
 945      * test.
 946      */
 947     if (!have_guest_base) {
 948         FILE *fp;
 949
 950         if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) {
 951             unsigned long tmp;
 952             if (fscanf(fp, "%lu", &tmp) == 1) {
 953                 mmap_min_addr = tmp;
 954                 qemu_log_mask(CPU_LOG_PAGE, "host mmap_min_addr=0x%lx\n", mmap_min_addr);
 955             }
 956             fclose(fp);
 957         }
 958     }
 959
 960     if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) {
 961         printf("Error loading %s\n", filename);
 962         _exit(1);
 963     }
 964
 965     for (wrk = target_environ; *wrk; wrk++) {
 966         g_free(*wrk);
 967     }
 968
 969     g_free(target_environ);
 970
 971     if (qemu_loglevel_mask(CPU_LOG_PAGE)) {
 972         qemu_log("guest_base  %p\n", (void *)guest_base);
 973         log_page_dump("binary load");
 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     /* Now that we've loaded the binary, GUEST_BASE is fixed.  Delay
 993        generating the prologue until now so that the prologue can take
 994        the real value of GUEST_BASE into account.  */
 995     tcg_prologue_init(tcg_ctx);
 996     tcg_region_init();
 997
 998     /* build Task State */
 999     memset(ts, 0, sizeof(TaskState));
1000     init_task_state(ts);
1001     ts->info = info;
1002     cpu->opaque = ts;
1003
1004 #if defined(TARGET_I386)
1005     env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
1006     env->hflags |= HF_PE_MASK | HF_CPL_MASK;
1007     if (env->features[FEAT_1_EDX] & CPUID_SSE) {
1008         env->cr[4] |= CR4_OSFXSR_MASK;
1009         env->hflags |= HF_OSFXSR_MASK;
1010     }
1011 #ifndef TARGET_ABI32
1012     /* enable 64 bit mode if possible */
1013     if (!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM)) {
1014         fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n");
1015         exit(1);
1016     }
1017     env->cr[4] |= CR4_PAE_MASK;
1018     env->efer |= MSR_EFER_LMA | MSR_EFER_LME;
1019     env->hflags |= HF_LMA_MASK;
1020 #endif
1021
1022     /* flags setup : we activate the IRQs by default as in user mode */
1023     env->eflags |= IF_MASK;
1024
1025     /* linux register setup */
1026 #ifndef TARGET_ABI32
1027     env->regs[R_EAX] = regs->rax;
1028     env->regs[R_EBX] = regs->rbx;
1029     env->regs[R_ECX] = regs->rcx;
1030     env->regs[R_EDX] = regs->rdx;
1031     env->regs[R_ESI] = regs->rsi;
1032     env->regs[R_EDI] = regs->rdi;
1033     env->regs[R_EBP] = regs->rbp;
1034     env->regs[R_ESP] = regs->rsp;
1035     env->eip = regs->rip;
1036 #else
1037     env->regs[R_EAX] = regs->eax;
1038     env->regs[R_EBX] = regs->ebx;
1039     env->regs[R_ECX] = regs->ecx;
1040     env->regs[R_EDX] = regs->edx;
1041     env->regs[R_ESI] = regs->esi;
1042     env->regs[R_EDI] = regs->edi;
1043     env->regs[R_EBP] = regs->ebp;
1044     env->regs[R_ESP] = regs->esp;
1045     env->eip = regs->eip;
1046 #endif
1047
1048     /* linux interrupt setup */
1049 #ifndef TARGET_ABI32
1050     env->idt.limit = 511;
1051 #else
1052     env->idt.limit = 255;
1053 #endif
1054     env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1),
1055                                 PROT_READ|PROT_WRITE,
1056                                 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1057     idt_table = g2h_untagged(env->idt.base);
1058     set_idt(0, 0);
1059     set_idt(1, 0);
1060     set_idt(2, 0);
1061     set_idt(3, 3);
1062     set_idt(4, 3);
1063     set_idt(5, 0);
1064     set_idt(6, 0);
1065     set_idt(7, 0);
1066     set_idt(8, 0);
1067     set_idt(9, 0);
1068     set_idt(10, 0);
1069     set_idt(11, 0);
1070     set_idt(12, 0);
1071     set_idt(13, 0);
1072     set_idt(14, 0);
1073     set_idt(15, 0);
1074     set_idt(16, 0);
1075     set_idt(17, 0);
1076     set_idt(18, 0);
1077     set_idt(19, 0);
1078     set_idt(0x80, 3);
1079
1080     /* linux segment setup */
1081     {
1082         uint64_t *gdt_table;
1083         env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES,
1084                                     PROT_READ|PROT_WRITE,
1085                                     MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1086         env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1;
1087         gdt_table = g2h_untagged(env->gdt.base);
1088 #ifdef TARGET_ABI32
1089         write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1090                  DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1091                  (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1092 #else
1093         /* 64 bit code segment */
1094         write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1095                  DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1096                  DESC_L_MASK |
1097                  (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1098 #endif
1099         write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff,
1100                  DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1101                  (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
1102     }
1103
1104     cpu_x86_load_seg(env, R_CS, __USER_CS);
1105     cpu_x86_load_seg(env, R_SS, __USER_DS);
1106 #ifdef TARGET_ABI32
1107     cpu_x86_load_seg(env, R_DS, __USER_DS);
1108     cpu_x86_load_seg(env, R_ES, __USER_DS);
1109     cpu_x86_load_seg(env, R_FS, __USER_DS);
1110     cpu_x86_load_seg(env, R_GS, __USER_DS);
1111     /* This hack makes Wine work... */
1112     env->segs[R_FS].selector = 0;
1113 #else
1114     cpu_x86_load_seg(env, R_DS, 0);
1115     cpu_x86_load_seg(env, R_ES, 0);
1116     cpu_x86_load_seg(env, R_FS, 0);
1117     cpu_x86_load_seg(env, R_GS, 0);
1118 #endif
1119 #elif defined(TARGET_SPARC)
1120     {
1121         int i;
1122         env->pc = regs->pc;
1123         env->npc = regs->npc;
1124         env->y = regs->y;
1125         for(i = 0; i < 8; i++)
1126             env->gregs[i] = regs->u_regs[i];
1127         for(i = 0; i < 8; i++)
1128             env->regwptr[i] = regs->u_regs[i + 8];
1129     }
1130 #else
1131 #error unsupported target CPU
1132 #endif
1133
1134     if (gdbstub) {
1135         gdbserver_start(gdbstub);
1136         gdb_handlesig(cpu, 0);
1137     }
1138     cpu_loop(env);
1139     /* never exits */
1140     return 0;
1141 }