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 "exec-all.h"
  33
  34
  35 #include "envlist.h"
  36
  37 #define DEBUG_LOGFILE "/tmp/qemu.log"
  38
  39 int singlestep;
  40 #if defined(CONFIG_USE_GUEST_BASE)
  41 unsigned long mmap_min_addr;
  42 unsigned long guest_base;
  43 int have_guest_base;
  44 #endif
  45
  46 static const char *interp_prefix = CONFIG_QEMU_PREFIX;
  47 const char *qemu_uname_release = CONFIG_UNAME_RELEASE;
  48 extern char **environ;
  49 enum BSDType bsd_type;
  50
  51 /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
  52    we allocate a bigger stack. Need a better solution, for example
  53    by remapping the process stack directly at the right place */
  54 unsigned long x86_stack_size = 512 * 1024;
  55
  56 void gemu_log(const char *fmt, ...)
  57 {
  58     va_list ap;
  59
  60     va_start(ap, fmt);
  61     vfprintf(stderr, fmt, ap);
  62     va_end(ap);
  63 }
  64
  65 #if defined(TARGET_I386)
  66 int cpu_get_pic_interrupt(CPUState *env)
  67 {
  68     return -1;
  69 }
  70 #endif
  71
  72 /* These are no-ops because we are not threadsafe.  */
  73 static inline void cpu_exec_start(CPUState *env)
  74 {
  75 }
  76
  77 static inline void cpu_exec_end(CPUState *env)
  78 {
  79 }
  80
  81 static inline void start_exclusive(void)
  82 {
  83 }
  84
  85 static inline void end_exclusive(void)
  86 {
  87 }
  88
  89 void fork_start(void)
  90 {
  91 }
  92
  93 void fork_end(int child)
  94 {
  95     if (child) {
  96         gdbserver_fork(thread_env);
  97     }
  98 }
  99
 100 void cpu_list_lock(void)
 101 {
 102 }
 103
 104 void cpu_list_unlock(void)
 105 {
 106 }
 107
 108 #ifdef TARGET_I386
 109 /***********************************************************/
 110 /* CPUX86 core interface */
 111
 112 void cpu_smm_update(CPUState *env)
 113 {
 114 }
 115
 116 uint64_t cpu_get_tsc(CPUX86State *env)
 117 {
 118     return cpu_get_real_ticks();
 119 }
 120
 121 static void write_dt(void *ptr, unsigned long addr, unsigned long limit,
 122                      int flags)
 123 {
 124     unsigned int e1, e2;
 125     uint32_t *p;
 126     e1 = (addr << 16) | (limit & 0xffff);
 127     e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
 128     e2 |= flags;
 129     p = ptr;
 130     p[0] = tswap32(e1);
 131     p[1] = tswap32(e2);
 132 }
 133
 134 static uint64_t *idt_table;
 135 #ifdef TARGET_X86_64
 136 static void set_gate64(void *ptr, unsigned int type, unsigned int dpl,
 137                        uint64_t addr, unsigned int sel)
 138 {
 139     uint32_t *p, e1, e2;
 140     e1 = (addr & 0xffff) | (sel << 16);
 141     e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
 142     p = ptr;
 143     p[0] = tswap32(e1);
 144     p[1] = tswap32(e2);
 145     p[2] = tswap32(addr >> 32);
 146     p[3] = 0;
 147 }
 148 /* only dpl matters as we do only user space emulation */
 149 static void set_idt(int n, unsigned int dpl)
 150 {
 151     set_gate64(idt_table + n * 2, 0, dpl, 0, 0);
 152 }
 153 #else
 154 static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
 155                      uint32_t addr, unsigned int sel)
 156 {
 157     uint32_t *p, e1, e2;
 158     e1 = (addr & 0xffff) | (sel << 16);
 159     e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
 160     p = ptr;
 161     p[0] = tswap32(e1);
 162     p[1] = tswap32(e2);
 163 }
 164
 165 /* only dpl matters as we do only user space emulation */
 166 static void set_idt(int n, unsigned int dpl)
 167 {
 168     set_gate(idt_table + n, 0, dpl, 0, 0);
 169 }
 170 #endif
 171
 172 void cpu_loop(CPUX86State *env)
 173 {
 174     int trapnr;
 175     abi_ulong pc;
 176     //target_siginfo_t info;
 177
 178     for(;;) {
 179         trapnr = cpu_x86_exec(env);
 180         switch(trapnr) {
 181         case 0x80:
 182             /* syscall from int $0x80 */
 183             if (bsd_type == target_freebsd) {
 184                 abi_ulong params = (abi_ulong) env->regs[R_ESP] +
 185                     sizeof(int32_t);
 186                 int32_t syscall_nr = env->regs[R_EAX];
 187                 int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8;
 188
 189                 if (syscall_nr == TARGET_FREEBSD_NR_syscall) {
 190                     get_user_s32(syscall_nr, params);
 191                     params += sizeof(int32_t);
 192                 } else if (syscall_nr == TARGET_FREEBSD_NR___syscall) {
 193                     get_user_s32(syscall_nr, params);
 194                     params += sizeof(int64_t);
 195                 }
 196                 get_user_s32(arg1, params);
 197                 params += sizeof(int32_t);
 198                 get_user_s32(arg2, params);
 199                 params += sizeof(int32_t);
 200                 get_user_s32(arg3, params);
 201                 params += sizeof(int32_t);
 202                 get_user_s32(arg4, params);
 203                 params += sizeof(int32_t);
 204                 get_user_s32(arg5, params);
 205                 params += sizeof(int32_t);
 206                 get_user_s32(arg6, params);
 207                 params += sizeof(int32_t);
 208                 get_user_s32(arg7, params);
 209                 params += sizeof(int32_t);
 210                 get_user_s32(arg8, params);
 211                 env->regs[R_EAX] = do_freebsd_syscall(env,
 212                                                       syscall_nr,
 213                                                       arg1,
 214                                                       arg2,
 215                                                       arg3,
 216                                                       arg4,
 217                                                       arg5,
 218                                                       arg6,
 219                                                       arg7,
 220                                                       arg8);
 221             } else { //if (bsd_type == target_openbsd)
 222                 env->regs[R_EAX] = do_openbsd_syscall(env,
 223                                                       env->regs[R_EAX],
 224                                                       env->regs[R_EBX],
 225                                                       env->regs[R_ECX],
 226                                                       env->regs[R_EDX],
 227                                                       env->regs[R_ESI],
 228                                                       env->regs[R_EDI],
 229                                                       env->regs[R_EBP]);
 230             }
 231             if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) {
 232                 env->regs[R_EAX] = -env->regs[R_EAX];
 233                 env->eflags |= CC_C;
 234             } else {
 235                 env->eflags &= ~CC_C;
 236             }
 237             break;
 238 #ifndef TARGET_ABI32
 239         case EXCP_SYSCALL:
 240             /* syscall from syscall intruction */
 241             if (bsd_type == target_freebsd)
 242                 env->regs[R_EAX] = do_freebsd_syscall(env,
 243                                                       env->regs[R_EAX],
 244                                                       env->regs[R_EDI],
 245                                                       env->regs[R_ESI],
 246                                                       env->regs[R_EDX],
 247                                                       env->regs[R_ECX],
 248                                                       env->regs[8],
 249                                                       env->regs[9], 0, 0);
 250             else { //if (bsd_type == target_openbsd)
 251                 env->regs[R_EAX] = do_openbsd_syscall(env,
 252                                                       env->regs[R_EAX],
 253                                                       env->regs[R_EDI],
 254                                                       env->regs[R_ESI],
 255                                                       env->regs[R_EDX],
 256                                                       env->regs[10],
 257                                                       env->regs[8],
 258                                                       env->regs[9]);
 259             }
 260             env->eip = env->exception_next_eip;
 261             if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) {
 262                 env->regs[R_EAX] = -env->regs[R_EAX];
 263                 env->eflags |= CC_C;
 264             } else {
 265                 env->eflags &= ~CC_C;
 266             }
 267             break;
 268 #endif
 269 #if 0
 270         case EXCP0B_NOSEG:
 271         case EXCP0C_STACK:
 272             info.si_signo = SIGBUS;
 273             info.si_errno = 0;
 274             info.si_code = TARGET_SI_KERNEL;
 275             info._sifields._sigfault._addr = 0;
 276             queue_signal(env, info.si_signo, &info);
 277             break;
 278         case EXCP0D_GPF:
 279             /* XXX: potential problem if ABI32 */
 280 #ifndef TARGET_X86_64
 281             if (env->eflags & VM_MASK) {
 282                 handle_vm86_fault(env);
 283             } else
 284 #endif
 285             {
 286                 info.si_signo = SIGSEGV;
 287                 info.si_errno = 0;
 288                 info.si_code = TARGET_SI_KERNEL;
 289                 info._sifields._sigfault._addr = 0;
 290                 queue_signal(env, info.si_signo, &info);
 291             }
 292             break;
 293         case EXCP0E_PAGE:
 294             info.si_signo = SIGSEGV;
 295             info.si_errno = 0;
 296             if (!(env->error_code & 1))
 297                 info.si_code = TARGET_SEGV_MAPERR;
 298             else
 299                 info.si_code = TARGET_SEGV_ACCERR;
 300             info._sifields._sigfault._addr = env->cr[2];
 301             queue_signal(env, info.si_signo, &info);
 302             break;
 303         case EXCP00_DIVZ:
 304 #ifndef TARGET_X86_64
 305             if (env->eflags & VM_MASK) {
 306                 handle_vm86_trap(env, trapnr);
 307             } else
 308 #endif
 309             {
 310                 /* division by zero */
 311                 info.si_signo = SIGFPE;
 312                 info.si_errno = 0;
 313                 info.si_code = TARGET_FPE_INTDIV;
 314                 info._sifields._sigfault._addr = env->eip;
 315                 queue_signal(env, info.si_signo, &info);
 316             }
 317             break;
 318         case EXCP01_DB:
 319         case EXCP03_INT3:
 320 #ifndef TARGET_X86_64
 321             if (env->eflags & VM_MASK) {
 322                 handle_vm86_trap(env, trapnr);
 323             } else
 324 #endif
 325             {
 326                 info.si_signo = SIGTRAP;
 327                 info.si_errno = 0;
 328                 if (trapnr == EXCP01_DB) {
 329                     info.si_code = TARGET_TRAP_BRKPT;
 330                     info._sifields._sigfault._addr = env->eip;
 331                 } else {
 332                     info.si_code = TARGET_SI_KERNEL;
 333                     info._sifields._sigfault._addr = 0;
 334                 }
 335                 queue_signal(env, info.si_signo, &info);
 336             }
 337             break;
 338         case EXCP04_INTO:
 339         case EXCP05_BOUND:
 340 #ifndef TARGET_X86_64
 341             if (env->eflags & VM_MASK) {
 342                 handle_vm86_trap(env, trapnr);
 343             } else
 344 #endif
 345             {
 346                 info.si_signo = SIGSEGV;
 347                 info.si_errno = 0;
 348                 info.si_code = TARGET_SI_KERNEL;
 349                 info._sifields._sigfault._addr = 0;
 350                 queue_signal(env, info.si_signo, &info);
 351             }
 352             break;
 353         case EXCP06_ILLOP:
 354             info.si_signo = SIGILL;
 355             info.si_errno = 0;
 356             info.si_code = TARGET_ILL_ILLOPN;
 357             info._sifields._sigfault._addr = env->eip;
 358             queue_signal(env, info.si_signo, &info);
 359             break;
 360 #endif
 361         case EXCP_INTERRUPT:
 362             /* just indicate that signals should be handled asap */
 363             break;
 364 #if 0
 365         case EXCP_DEBUG:
 366             {
 367                 int sig;
 368
 369                 sig = gdb_handlesig (env, TARGET_SIGTRAP);
 370                 if (sig)
 371                   {
 372                     info.si_signo = sig;
 373                     info.si_errno = 0;
 374                     info.si_code = TARGET_TRAP_BRKPT;
 375                     queue_signal(env, info.si_signo, &info);
 376                   }
 377             }
 378             break;
 379 #endif
 380         default:
 381             pc = env->segs[R_CS].base + env->eip;
 382             fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
 383                     (long)pc, trapnr);
 384             abort();
 385         }
 386         process_pending_signals(env);
 387     }
 388 }
 389 #endif
 390
 391 #ifdef TARGET_SPARC
 392 #define SPARC64_STACK_BIAS 2047
 393
 394 //#define DEBUG_WIN
 395 /* WARNING: dealing with register windows _is_ complicated. More info
 396    can be found at http://www.sics.se/~psm/sparcstack.html */
 397 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index)
 398 {
 399     index = (index + cwp * 16) % (16 * env->nwindows);
 400     /* wrap handling : if cwp is on the last window, then we use the
 401        registers 'after' the end */
 402     if (index < 8 && env->cwp == env->nwindows - 1)
 403         index += 16 * env->nwindows;
 404     return index;
 405 }
 406
 407 /* save the register window 'cwp1' */
 408 static inline void save_window_offset(CPUSPARCState *env, int cwp1)
 409 {
 410     unsigned int i;
 411     abi_ulong sp_ptr;
 412
 413     sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
 414 #ifdef TARGET_SPARC64
 415     if (sp_ptr & 3)
 416         sp_ptr += SPARC64_STACK_BIAS;
 417 #endif
 418 #if defined(DEBUG_WIN)
 419     printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n",
 420            sp_ptr, cwp1);
 421 #endif
 422     for(i = 0; i < 16; i++) {
 423         /* FIXME - what to do if put_user() fails? */
 424         put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
 425         sp_ptr += sizeof(abi_ulong);
 426     }
 427 }
 428
 429 static void save_window(CPUSPARCState *env)
 430 {
 431 #ifndef TARGET_SPARC64
 432     unsigned int new_wim;
 433     new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) &
 434         ((1LL << env->nwindows) - 1);
 435     save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
 436     env->wim = new_wim;
 437 #else
 438     save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
 439     env->cansave++;
 440     env->canrestore--;
 441 #endif
 442 }
 443
 444 static void restore_window(CPUSPARCState *env)
 445 {
 446 #ifndef TARGET_SPARC64
 447     unsigned int new_wim;
 448 #endif
 449     unsigned int i, cwp1;
 450     abi_ulong sp_ptr;
 451
 452 #ifndef TARGET_SPARC64
 453     new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) &
 454         ((1LL << env->nwindows) - 1);
 455 #endif
 456
 457     /* restore the invalid window */
 458     cwp1 = cpu_cwp_inc(env, env->cwp + 1);
 459     sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
 460 #ifdef TARGET_SPARC64
 461     if (sp_ptr & 3)
 462         sp_ptr += SPARC64_STACK_BIAS;
 463 #endif
 464 #if defined(DEBUG_WIN)
 465     printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n",
 466            sp_ptr, cwp1);
 467 #endif
 468     for(i = 0; i < 16; i++) {
 469         /* FIXME - what to do if get_user() fails? */
 470         get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
 471         sp_ptr += sizeof(abi_ulong);
 472     }
 473 #ifdef TARGET_SPARC64
 474     env->canrestore++;
 475     if (env->cleanwin < env->nwindows - 1)
 476         env->cleanwin++;
 477     env->cansave--;
 478 #else
 479     env->wim = new_wim;
 480 #endif
 481 }
 482
 483 static void flush_windows(CPUSPARCState *env)
 484 {
 485     int offset, cwp1;
 486
 487     offset = 1;
 488     for(;;) {
 489         /* if restore would invoke restore_window(), then we can stop */
 490         cwp1 = cpu_cwp_inc(env, env->cwp + offset);
 491 #ifndef TARGET_SPARC64
 492         if (env->wim & (1 << cwp1))
 493             break;
 494 #else
 495         if (env->canrestore == 0)
 496             break;
 497         env->cansave++;
 498         env->canrestore--;
 499 #endif
 500         save_window_offset(env, cwp1);
 501         offset++;
 502     }
 503     cwp1 = cpu_cwp_inc(env, env->cwp + 1);
 504 #ifndef TARGET_SPARC64
 505     /* set wim so that restore will reload the registers */
 506     env->wim = 1 << cwp1;
 507 #endif
 508 #if defined(DEBUG_WIN)
 509     printf("flush_windows: nb=%d\n", offset - 1);
 510 #endif
 511 }
 512
 513 void cpu_loop(CPUSPARCState *env)
 514 {
 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 (env, 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(env, 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_ARCH " version " QEMU_VERSION ", Copyright (c) 2003-2008 Fabrice Bellard\n"
 675            "usage: qemu-" TARGET_ARCH " [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 ? 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 options   activate log (logfile=%s)\n"
 694            "-p pagesize  set the host page size to 'pagesize'\n"
 695            "-singlestep  always run in singlestep mode\n"
 696            "-strace      log system calls\n"
 697            "\n"
 698            "Environment variables:\n"
 699            "QEMU_STRACE       Print system calls and arguments similar to the\n"
 700            "                  'strace' program.  Enable by setting to any value.\n"
 701            "You can use -E and -U options to set/unset environment variables\n"
 702            "for target process.  It is possible to provide several variables\n"
 703            "by repeating the option.  For example:\n"
 704            "    -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n"
 705            "Note that if you provide several changes to single variable\n"
 706            "last change will stay in effect.\n"
 707            ,
 708            TARGET_ARCH,
 709            interp_prefix,
 710            x86_stack_size,
 711            DEBUG_LOGFILE);
 712     exit(1);
 713 }
 714
 715 THREAD CPUState *thread_env;
 716
 717 /* Assumes contents are already zeroed.  */
 718 void init_task_state(TaskState *ts)
 719 {
 720     int i;
 721
 722     ts->used = 1;
 723     ts->first_free = ts->sigqueue_table;
 724     for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) {
 725         ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1];
 726     }
 727     ts->sigqueue_table[i].next = NULL;
 728 }
 729
 730 int main(int argc, char **argv)
 731 {
 732     const char *filename;
 733     const char *cpu_model;
 734     struct target_pt_regs regs1, *regs = &regs1;
 735     struct image_info info1, *info = &info1;
 736     TaskState ts1, *ts = &ts1;
 737     CPUState *env;
 738     int optind;
 739     const char *r;
 740     int gdbstub_port = 0;
 741     char **target_environ, **wrk;
 742     envlist_t *envlist = NULL;
 743     bsd_type = target_openbsd;
 744
 745     if (argc <= 1)
 746         usage();
 747
 748     /* init debug */
 749     cpu_set_log_filename(DEBUG_LOGFILE);
 750
 751     if ((envlist = envlist_create()) == NULL) {
 752         (void) fprintf(stderr, "Unable to allocate envlist\n");
 753         exit(1);
 754     }
 755
 756     /* add current environment into the list */
 757     for (wrk = environ; *wrk != NULL; wrk++) {
 758         (void) envlist_setenv(envlist, *wrk);
 759     }
 760
 761     cpu_model = NULL;
 762     optind = 1;
 763     for(;;) {
 764         if (optind >= argc)
 765             break;
 766         r = argv[optind];
 767         if (r[0] != '-')
 768             break;
 769         optind++;
 770         r++;
 771         if (!strcmp(r, "-")) {
 772             break;
 773         } else if (!strcmp(r, "d")) {
 774             int mask;
 775             const CPULogItem *item;
 776
 777             if (optind >= argc)
 778                 break;
 779
 780             r = argv[optind++];
 781             mask = cpu_str_to_log_mask(r);
 782             if (!mask) {
 783                 printf("Log items (comma separated):\n");
 784                 for(item = cpu_log_items; item->mask != 0; item++) {
 785                     printf("%-10s %s\n", item->name, item->help);
 786                 }
 787                 exit(1);
 788             }
 789             cpu_set_log(mask);
 790         } else if (!strcmp(r, "E")) {
 791             r = argv[optind++];
 792             if (envlist_setenv(envlist, r) != 0)
 793                 usage();
 794         } else if (!strcmp(r, "U")) {
 795             r = argv[optind++];
 796             if (envlist_unsetenv(envlist, r) != 0)
 797                 usage();
 798         } else if (!strcmp(r, "s")) {
 799             r = argv[optind++];
 800             x86_stack_size = strtol(r, (char **)&r, 0);
 801             if (x86_stack_size <= 0)
 802                 usage();
 803             if (*r == 'M')
 804                 x86_stack_size *= 1024 * 1024;
 805             else if (*r == 'k' || *r == 'K')
 806                 x86_stack_size *= 1024;
 807         } else if (!strcmp(r, "L")) {
 808             interp_prefix = argv[optind++];
 809         } else if (!strcmp(r, "p")) {
 810             qemu_host_page_size = atoi(argv[optind++]);
 811             if (qemu_host_page_size == 0 ||
 812                 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
 813                 fprintf(stderr, "page size must be a power of two\n");
 814                 exit(1);
 815             }
 816         } else if (!strcmp(r, "g")) {
 817             gdbstub_port = atoi(argv[optind++]);
 818         } else if (!strcmp(r, "r")) {
 819             qemu_uname_release = argv[optind++];
 820         } else if (!strcmp(r, "cpu")) {
 821             cpu_model = argv[optind++];
 822             if (strcmp(cpu_model, "?") == 0) {
 823 /* XXX: implement xxx_cpu_list for targets that still miss it */
 824 #if defined(cpu_list)
 825                     cpu_list(stdout, &fprintf);
 826 #endif
 827                 exit(1);
 828             }
 829 #if defined(CONFIG_USE_GUEST_BASE)
 830         } else if (!strcmp(r, "B")) {
 831            guest_base = strtol(argv[optind++], NULL, 0);
 832            have_guest_base = 1;
 833 #endif
 834         } else if (!strcmp(r, "drop-ld-preload")) {
 835             (void) envlist_unsetenv(envlist, "LD_PRELOAD");
 836         } else if (!strcmp(r, "bsd")) {
 837             if (!strcasecmp(argv[optind], "freebsd")) {
 838                 bsd_type = target_freebsd;
 839             } else if (!strcasecmp(argv[optind], "netbsd")) {
 840                 bsd_type = target_netbsd;
 841             } else if (!strcasecmp(argv[optind], "openbsd")) {
 842                 bsd_type = target_openbsd;
 843             } else {
 844                 usage();
 845             }
 846             optind++;
 847         } else if (!strcmp(r, "singlestep")) {
 848             singlestep = 1;
 849         } else if (!strcmp(r, "strace")) {
 850             do_strace = 1;
 851         } else
 852         {
 853             usage();
 854         }
 855     }
 856     if (optind >= argc)
 857         usage();
 858     filename = argv[optind];
 859
 860     /* Zero out regs */
 861     memset(regs, 0, sizeof(struct target_pt_regs));
 862
 863     /* Zero out image_info */
 864     memset(info, 0, sizeof(struct image_info));
 865
 866     /* Scan interp_prefix dir for replacement files. */
 867     init_paths(interp_prefix);
 868
 869     if (cpu_model == NULL) {
 870 #if defined(TARGET_I386)
 871 #ifdef TARGET_X86_64
 872         cpu_model = "qemu64";
 873 #else
 874         cpu_model = "qemu32";
 875 #endif
 876 #elif defined(TARGET_SPARC)
 877 #ifdef TARGET_SPARC64
 878         cpu_model = "TI UltraSparc II";
 879 #else
 880         cpu_model = "Fujitsu MB86904";
 881 #endif
 882 #else
 883         cpu_model = "any";
 884 #endif
 885     }
 886     cpu_exec_init_all(0);
 887     /* NOTE: we need to init the CPU at this stage to get
 888        qemu_host_page_size */
 889     env = cpu_init(cpu_model);
 890     if (!env) {
 891         fprintf(stderr, "Unable to find CPU definition\n");
 892         exit(1);
 893     }
 894 #if defined(TARGET_I386) || defined(TARGET_SPARC) || defined(TARGET_PPC)
 895     cpu_reset(env);
 896 #endif
 897     thread_env = env;
 898
 899     if (getenv("QEMU_STRACE")) {
 900         do_strace = 1;
 901     }
 902
 903     target_environ = envlist_to_environ(envlist, NULL);
 904     envlist_free(envlist);
 905
 906 #if defined(CONFIG_USE_GUEST_BASE)
 907     /*
 908      * Now that page sizes are configured in cpu_init() we can do
 909      * proper page alignment for guest_base.
 910      */
 911     guest_base = HOST_PAGE_ALIGN(guest_base);
 912
 913     /*
 914      * Read in mmap_min_addr kernel parameter.  This value is used
 915      * When loading the ELF image to determine whether guest_base
 916      * is needed.
 917      *
 918      * When user has explicitly set the quest base, we skip this
 919      * test.
 920      */
 921     if (!have_guest_base) {
 922         FILE *fp;
 923
 924         if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) {
 925             unsigned long tmp;
 926             if (fscanf(fp, "%lu", &tmp) == 1) {
 927                 mmap_min_addr = tmp;
 928                 qemu_log("host mmap_min_addr=0x%lx\n", mmap_min_addr);
 929             }
 930             fclose(fp);
 931         }
 932     }
 933 #endif /* CONFIG_USE_GUEST_BASE */
 934
 935     if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) {
 936         printf("Error loading %s\n", filename);
 937         _exit(1);
 938     }
 939
 940     for (wrk = target_environ; *wrk; wrk++) {
 941         free(*wrk);
 942     }
 943
 944     free(target_environ);
 945
 946     if (qemu_log_enabled()) {
 947 #if defined(CONFIG_USE_GUEST_BASE)
 948         qemu_log("guest_base  0x%lx\n", guest_base);
 949 #endif
 950         log_page_dump();
 951
 952         qemu_log("start_brk   0x" TARGET_ABI_FMT_lx "\n", info->start_brk);
 953         qemu_log("end_code    0x" TARGET_ABI_FMT_lx "\n", info->end_code);
 954         qemu_log("start_code  0x" TARGET_ABI_FMT_lx "\n",
 955                  info->start_code);
 956         qemu_log("start_data  0x" TARGET_ABI_FMT_lx "\n",
 957                  info->start_data);
 958         qemu_log("end_data    0x" TARGET_ABI_FMT_lx "\n", info->end_data);
 959         qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n",
 960                  info->start_stack);
 961         qemu_log("brk         0x" TARGET_ABI_FMT_lx "\n", info->brk);
 962         qemu_log("entry       0x" TARGET_ABI_FMT_lx "\n", info->entry);
 963     }
 964
 965     target_set_brk(info->brk);
 966     syscall_init();
 967     signal_init();
 968
 969     /* build Task State */
 970     memset(ts, 0, sizeof(TaskState));
 971     init_task_state(ts);
 972     ts->info = info;
 973     env->opaque = ts;
 974
 975 #if defined(TARGET_I386)
 976     cpu_x86_set_cpl(env, 3);
 977
 978     env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
 979     env->hflags |= HF_PE_MASK;
 980     if (env->cpuid_features & CPUID_SSE) {
 981         env->cr[4] |= CR4_OSFXSR_MASK;
 982         env->hflags |= HF_OSFXSR_MASK;
 983     }
 984 #ifndef TARGET_ABI32
 985     /* enable 64 bit mode if possible */
 986     if (!(env->cpuid_ext2_features & CPUID_EXT2_LM)) {
 987         fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n");
 988         exit(1);
 989     }
 990     env->cr[4] |= CR4_PAE_MASK;
 991     env->efer |= MSR_EFER_LMA | MSR_EFER_LME;
 992     env->hflags |= HF_LMA_MASK;
 993 #endif
 994
 995     /* flags setup : we activate the IRQs by default as in user mode */
 996     env->eflags |= IF_MASK;
 997
 998     /* linux register setup */
 999 #ifndef TARGET_ABI32
1000     env->regs[R_EAX] = regs->rax;
1001     env->regs[R_EBX] = regs->rbx;
1002     env->regs[R_ECX] = regs->rcx;
1003     env->regs[R_EDX] = regs->rdx;
1004     env->regs[R_ESI] = regs->rsi;
1005     env->regs[R_EDI] = regs->rdi;
1006     env->regs[R_EBP] = regs->rbp;
1007     env->regs[R_ESP] = regs->rsp;
1008     env->eip = regs->rip;
1009 #else
1010     env->regs[R_EAX] = regs->eax;
1011     env->regs[R_EBX] = regs->ebx;
1012     env->regs[R_ECX] = regs->ecx;
1013     env->regs[R_EDX] = regs->edx;
1014     env->regs[R_ESI] = regs->esi;
1015     env->regs[R_EDI] = regs->edi;
1016     env->regs[R_EBP] = regs->ebp;
1017     env->regs[R_ESP] = regs->esp;
1018     env->eip = regs->eip;
1019 #endif
1020
1021     /* linux interrupt setup */
1022 #ifndef TARGET_ABI32
1023     env->idt.limit = 511;
1024 #else
1025     env->idt.limit = 255;
1026 #endif
1027     env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1),
1028                                 PROT_READ|PROT_WRITE,
1029                                 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1030     idt_table = g2h(env->idt.base);
1031     set_idt(0, 0);
1032     set_idt(1, 0);
1033     set_idt(2, 0);
1034     set_idt(3, 3);
1035     set_idt(4, 3);
1036     set_idt(5, 0);
1037     set_idt(6, 0);
1038     set_idt(7, 0);
1039     set_idt(8, 0);
1040     set_idt(9, 0);
1041     set_idt(10, 0);
1042     set_idt(11, 0);
1043     set_idt(12, 0);
1044     set_idt(13, 0);
1045     set_idt(14, 0);
1046     set_idt(15, 0);
1047     set_idt(16, 0);
1048     set_idt(17, 0);
1049     set_idt(18, 0);
1050     set_idt(19, 0);
1051     set_idt(0x80, 3);
1052
1053     /* linux segment setup */
1054     {
1055         uint64_t *gdt_table;
1056         env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES,
1057                                     PROT_READ|PROT_WRITE,
1058                                     MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1059         env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1;
1060         gdt_table = g2h(env->gdt.base);
1061 #ifdef TARGET_ABI32
1062         write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1063                  DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1064                  (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1065 #else
1066         /* 64 bit code segment */
1067         write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1068                  DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1069                  DESC_L_MASK |
1070                  (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1071 #endif
1072         write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff,
1073                  DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1074                  (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
1075     }
1076
1077     cpu_x86_load_seg(env, R_CS, __USER_CS);
1078     cpu_x86_load_seg(env, R_SS, __USER_DS);
1079 #ifdef TARGET_ABI32
1080     cpu_x86_load_seg(env, R_DS, __USER_DS);
1081     cpu_x86_load_seg(env, R_ES, __USER_DS);
1082     cpu_x86_load_seg(env, R_FS, __USER_DS);
1083     cpu_x86_load_seg(env, R_GS, __USER_DS);
1084     /* This hack makes Wine work... */
1085     env->segs[R_FS].selector = 0;
1086 #else
1087     cpu_x86_load_seg(env, R_DS, 0);
1088     cpu_x86_load_seg(env, R_ES, 0);
1089     cpu_x86_load_seg(env, R_FS, 0);
1090     cpu_x86_load_seg(env, R_GS, 0);
1091 #endif
1092 #elif defined(TARGET_SPARC)
1093     {
1094         int i;
1095         env->pc = regs->pc;
1096         env->npc = regs->npc;
1097         env->y = regs->y;
1098         for(i = 0; i < 8; i++)
1099             env->gregs[i] = regs->u_regs[i];
1100         for(i = 0; i < 8; i++)
1101             env->regwptr[i] = regs->u_regs[i + 8];
1102     }
1103 #else
1104 #error unsupported target CPU
1105 #endif
1106
1107     if (gdbstub_port) {
1108         gdbserver_start (gdbstub_port);
1109         gdb_handlesig(env, 0);
1110     }
1111     cpu_loop(env);
1112     /* never exits */
1113     return 0;
1114 }