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 = CONFIG_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(thread_env);
  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     int trapnr, ret, syscall_nr;
 515     //target_siginfo_t info;
 516
 517     while (1) {
 518         trapnr = cpu_sparc_exec (env);
 519
 520         switch (trapnr) {
 521 #ifndef TARGET_SPARC64
 522         case 0x80:
 523 #else
 524         /* FreeBSD uses 0x141 for syscalls too */
 525         case 0x141:
 526             if (bsd_type != target_freebsd)
 527                 goto badtrap;
 528         case 0x100:
 529 #endif
 530             syscall_nr = env->gregs[1];
 531             if (bsd_type == target_freebsd)
 532                 ret = do_freebsd_syscall(env, syscall_nr,
 533                                          env->regwptr[0], env->regwptr[1],
 534                                          env->regwptr[2], env->regwptr[3],
 535                                          env->regwptr[4], env->regwptr[5], 0, 0);
 536             else if (bsd_type == target_netbsd)
 537                 ret = do_netbsd_syscall(env, syscall_nr,
 538                                         env->regwptr[0], env->regwptr[1],
 539                                         env->regwptr[2], env->regwptr[3],
 540                                         env->regwptr[4], env->regwptr[5]);
 541             else { //if (bsd_type == target_openbsd)
 542 #if defined(TARGET_SPARC64)
 543                 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG |
 544                                 TARGET_OPENBSD_SYSCALL_G2RFLAG);
 545 #endif
 546                 ret = do_openbsd_syscall(env, syscall_nr,
 547                                          env->regwptr[0], env->regwptr[1],
 548                                          env->regwptr[2], env->regwptr[3],
 549                                          env->regwptr[4], env->regwptr[5]);
 550             }
 551             if ((unsigned int)ret >= (unsigned int)(-515)) {
 552                 ret = -ret;
 553 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
 554                 env->xcc |= PSR_CARRY;
 555 #else
 556                 env->psr |= PSR_CARRY;
 557 #endif
 558             } else {
 559 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
 560                 env->xcc &= ~PSR_CARRY;
 561 #else
 562                 env->psr &= ~PSR_CARRY;
 563 #endif
 564             }
 565             env->regwptr[0] = ret;
 566             /* next instruction */
 567 #if defined(TARGET_SPARC64)
 568             if (bsd_type == target_openbsd &&
 569                 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) {
 570                 env->pc = env->gregs[2];
 571                 env->npc = env->pc + 4;
 572             } else if (bsd_type == target_openbsd &&
 573                        env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) {
 574                 env->pc = env->gregs[7];
 575                 env->npc = env->pc + 4;
 576             } else {
 577                 env->pc = env->npc;
 578                 env->npc = env->npc + 4;
 579             }
 580 #else
 581             env->pc = env->npc;
 582             env->npc = env->npc + 4;
 583 #endif
 584             break;
 585         case 0x83: /* flush windows */
 586 #ifdef TARGET_ABI32
 587         case 0x103:
 588 #endif
 589             flush_windows(env);
 590             /* next instruction */
 591             env->pc = env->npc;
 592             env->npc = env->npc + 4;
 593             break;
 594 #ifndef TARGET_SPARC64
 595         case TT_WIN_OVF: /* window overflow */
 596             save_window(env);
 597             break;
 598         case TT_WIN_UNF: /* window underflow */
 599             restore_window(env);
 600             break;
 601         case TT_TFAULT:
 602         case TT_DFAULT:
 603 #if 0
 604             {
 605                 info.si_signo = SIGSEGV;
 606                 info.si_errno = 0;
 607                 /* XXX: check env->error_code */
 608                 info.si_code = TARGET_SEGV_MAPERR;
 609                 info._sifields._sigfault._addr = env->mmuregs[4];
 610                 queue_signal(env, info.si_signo, &info);
 611             }
 612 #endif
 613             break;
 614 #else
 615         case TT_SPILL: /* window overflow */
 616             save_window(env);
 617             break;
 618         case TT_FILL: /* window underflow */
 619             restore_window(env);
 620             break;
 621         case TT_TFAULT:
 622         case TT_DFAULT:
 623 #if 0
 624             {
 625                 info.si_signo = SIGSEGV;
 626                 info.si_errno = 0;
 627                 /* XXX: check env->error_code */
 628                 info.si_code = TARGET_SEGV_MAPERR;
 629                 if (trapnr == TT_DFAULT)
 630                     info._sifields._sigfault._addr = env->dmmuregs[4];
 631                 else
 632                     info._sifields._sigfault._addr = env->tsptr->tpc;
 633                 //queue_signal(env, info.si_signo, &info);
 634             }
 635 #endif
 636             break;
 637 #endif
 638         case EXCP_INTERRUPT:
 639             /* just indicate that signals should be handled asap */
 640             break;
 641         case EXCP_DEBUG:
 642             {
 643                 int sig;
 644
 645                 sig = gdb_handlesig (env, TARGET_SIGTRAP);
 646 #if 0
 647                 if (sig)
 648                   {
 649                     info.si_signo = sig;
 650                     info.si_errno = 0;
 651                     info.si_code = TARGET_TRAP_BRKPT;
 652                     //queue_signal(env, info.si_signo, &info);
 653                   }
 654 #endif
 655             }
 656             break;
 657         default:
 658 #ifdef TARGET_SPARC64
 659         badtrap:
 660 #endif
 661             printf ("Unhandled trap: 0x%x\n", trapnr);
 662             cpu_dump_state(env, stderr, fprintf, 0);
 663             exit (1);
 664         }
 665         process_pending_signals (env);
 666     }
 667 }
 668
 669 #endif
 670
 671 static void usage(void)
 672 {
 673     printf("qemu-" TARGET_ARCH " version " QEMU_VERSION ", Copyright (c) 2003-2008 Fabrice Bellard\n"
 674            "usage: qemu-" TARGET_ARCH " [options] program [arguments...]\n"
 675            "BSD CPU emulator (compiled for %s emulation)\n"
 676            "\n"
 677            "Standard options:\n"
 678            "-h                print this help\n"
 679            "-g port           wait gdb connection to port\n"
 680            "-L path           set the elf interpreter prefix (default=%s)\n"
 681            "-s size           set the stack size in bytes (default=%ld)\n"
 682            "-cpu model        select CPU (-cpu help for list)\n"
 683            "-drop-ld-preload  drop LD_PRELOAD for target process\n"
 684            "-E var=value      sets/modifies targets environment variable(s)\n"
 685            "-U var            unsets targets environment variable(s)\n"
 686 #if defined(CONFIG_USE_GUEST_BASE)
 687            "-B address        set guest_base address to address\n"
 688 #endif
 689            "-bsd type         select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n"
 690            "\n"
 691            "Debug options:\n"
 692            "-d item1[,...]    enable logging of specified items\n"
 693            "                  (use '-d help' for a list of log items)\n"
 694            "-D logfile        write logs to 'logfile' (default stderr)\n"
 695            "-p pagesize       set the host page size to 'pagesize'\n"
 696            "-singlestep       always run in singlestep mode\n"
 697            "-strace           log system calls\n"
 698            "\n"
 699            "Environment variables:\n"
 700            "QEMU_STRACE       Print system calls and arguments similar to the\n"
 701            "                  'strace' program.  Enable by setting to any value.\n"
 702            "You can use -E and -U options to set/unset environment variables\n"
 703            "for target process.  It is possible to provide several variables\n"
 704            "by repeating the option.  For example:\n"
 705            "    -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n"
 706            "Note that if you provide several changes to single variable\n"
 707            "last change will stay in effect.\n"
 708            ,
 709            TARGET_ARCH,
 710            interp_prefix,
 711            x86_stack_size);
 712     exit(1);
 713 }
 714
 715 THREAD CPUArchState *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     const char *log_file = NULL;
 735     const char *log_mask = NULL;
 736     struct target_pt_regs regs1, *regs = &regs1;
 737     struct image_info info1, *info = &info1;
 738     TaskState ts1, *ts = &ts1;
 739     CPUArchState *env;
 740     int optind;
 741     const char *r;
 742     int gdbstub_port = 0;
 743     char **target_environ, **wrk;
 744     envlist_t *envlist = NULL;
 745     bsd_type = target_openbsd;
 746
 747     if (argc <= 1)
 748         usage();
 749
 750     module_call_init(MODULE_INIT_QOM);
 751
 752     if ((envlist = envlist_create()) == NULL) {
 753         (void) fprintf(stderr, "Unable to allocate envlist\n");
 754         exit(1);
 755     }
 756
 757     /* add current environment into the list */
 758     for (wrk = environ; *wrk != NULL; wrk++) {
 759         (void) envlist_setenv(envlist, *wrk);
 760     }
 761
 762     cpu_model = NULL;
 763 #if defined(cpudef_setup)
 764     cpudef_setup(); /* parse cpu definitions in target config file (TBD) */
 765 #endif
 766
 767     optind = 1;
 768     for(;;) {
 769         if (optind >= argc)
 770             break;
 771         r = argv[optind];
 772         if (r[0] != '-')
 773             break;
 774         optind++;
 775         r++;
 776         if (!strcmp(r, "-")) {
 777             break;
 778         } else if (!strcmp(r, "d")) {
 779             if (optind >= argc) {
 780                 break;
 781             }
 782             log_mask = argv[optind++];
 783         } else if (!strcmp(r, "D")) {
 784             if (optind >= argc) {
 785                 break;
 786             }
 787             log_file = argv[optind++];
 788         } else if (!strcmp(r, "E")) {
 789             r = argv[optind++];
 790             if (envlist_setenv(envlist, r) != 0)
 791                 usage();
 792         } else if (!strcmp(r, "ignore-environment")) {
 793             envlist_free(envlist);
 794             if ((envlist = envlist_create()) == NULL) {
 795                 (void) fprintf(stderr, "Unable to allocate envlist\n");
 796                 exit(1);
 797             }
 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 *= 1024 * 1024;
 809             else if (*r == 'k' || *r == 'K')
 810                 x86_stack_size *= 1024;
 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_port = atoi(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(stdout, &fprintf);
 830 #endif
 831                 exit(1);
 832             }
 833 #if defined(CONFIG_USE_GUEST_BASE)
 834         } else if (!strcmp(r, "B")) {
 835            guest_base = strtol(argv[optind++], NULL, 0);
 836            have_guest_base = 1;
 837 #endif
 838         } else if (!strcmp(r, "drop-ld-preload")) {
 839             (void) envlist_unsetenv(envlist, "LD_PRELOAD");
 840         } else if (!strcmp(r, "bsd")) {
 841             if (!strcasecmp(argv[optind], "freebsd")) {
 842                 bsd_type = target_freebsd;
 843             } else if (!strcasecmp(argv[optind], "netbsd")) {
 844                 bsd_type = target_netbsd;
 845             } else if (!strcasecmp(argv[optind], "openbsd")) {
 846                 bsd_type = target_openbsd;
 847             } else {
 848                 usage();
 849             }
 850             optind++;
 851         } else if (!strcmp(r, "singlestep")) {
 852             singlestep = 1;
 853         } else if (!strcmp(r, "strace")) {
 854             do_strace = 1;
 855         } else
 856         {
 857             usage();
 858         }
 859     }
 860
 861     /* init debug */
 862     qemu_set_log_filename(log_file);
 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     /* Zero out regs */
 880     memset(regs, 0, sizeof(struct target_pt_regs));
 881
 882     /* Zero out image_info */
 883     memset(info, 0, sizeof(struct image_info));
 884
 885     /* Scan interp_prefix dir for replacement files. */
 886     init_paths(interp_prefix);
 887
 888     if (cpu_model == NULL) {
 889 #if defined(TARGET_I386)
 890 #ifdef TARGET_X86_64
 891         cpu_model = "qemu64";
 892 #else
 893         cpu_model = "qemu32";
 894 #endif
 895 #elif defined(TARGET_SPARC)
 896 #ifdef TARGET_SPARC64
 897         cpu_model = "TI UltraSparc II";
 898 #else
 899         cpu_model = "Fujitsu MB86904";
 900 #endif
 901 #else
 902         cpu_model = "any";
 903 #endif
 904     }
 905     tcg_exec_init(0);
 906     cpu_exec_init_all();
 907     /* NOTE: we need to init the CPU at this stage to get
 908        qemu_host_page_size */
 909     env = cpu_init(cpu_model);
 910     if (!env) {
 911         fprintf(stderr, "Unable to find CPU definition\n");
 912         exit(1);
 913     }
 914 #if defined(TARGET_SPARC) || defined(TARGET_PPC)
 915     cpu_reset(ENV_GET_CPU(env));
 916 #endif
 917     thread_env = env;
 918
 919     if (getenv("QEMU_STRACE")) {
 920         do_strace = 1;
 921     }
 922
 923     target_environ = envlist_to_environ(envlist, NULL);
 924     envlist_free(envlist);
 925
 926 #if defined(CONFIG_USE_GUEST_BASE)
 927     /*
 928      * Now that page sizes are configured in cpu_init() we can do
 929      * proper page alignment for guest_base.
 930      */
 931     guest_base = HOST_PAGE_ALIGN(guest_base);
 932
 933     /*
 934      * Read in mmap_min_addr kernel parameter.  This value is used
 935      * When loading the ELF image to determine whether guest_base
 936      * is needed.
 937      *
 938      * When user has explicitly set the quest base, we skip this
 939      * test.
 940      */
 941     if (!have_guest_base) {
 942         FILE *fp;
 943
 944         if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) {
 945             unsigned long tmp;
 946             if (fscanf(fp, "%lu", &tmp) == 1) {
 947                 mmap_min_addr = tmp;
 948                 qemu_log("host mmap_min_addr=0x%lx\n", mmap_min_addr);
 949             }
 950             fclose(fp);
 951         }
 952     }
 953 #endif /* CONFIG_USE_GUEST_BASE */
 954
 955     if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) {
 956         printf("Error loading %s\n", filename);
 957         _exit(1);
 958     }
 959
 960     for (wrk = target_environ; *wrk; wrk++) {
 961         free(*wrk);
 962     }
 963
 964     free(target_environ);
 965
 966     if (qemu_log_enabled()) {
 967 #if defined(CONFIG_USE_GUEST_BASE)
 968         qemu_log("guest_base  0x%lx\n", guest_base);
 969 #endif
 970         log_page_dump();
 971
 972         qemu_log("start_brk   0x" TARGET_ABI_FMT_lx "\n", info->start_brk);
 973         qemu_log("end_code    0x" TARGET_ABI_FMT_lx "\n", info->end_code);
 974         qemu_log("start_code  0x" TARGET_ABI_FMT_lx "\n",
 975                  info->start_code);
 976         qemu_log("start_data  0x" TARGET_ABI_FMT_lx "\n",
 977                  info->start_data);
 978         qemu_log("end_data    0x" TARGET_ABI_FMT_lx "\n", info->end_data);
 979         qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n",
 980                  info->start_stack);
 981         qemu_log("brk         0x" TARGET_ABI_FMT_lx "\n", info->brk);
 982         qemu_log("entry       0x" TARGET_ABI_FMT_lx "\n", info->entry);
 983     }
 984
 985     target_set_brk(info->brk);
 986     syscall_init();
 987     signal_init();
 988
 989 #if defined(CONFIG_USE_GUEST_BASE)
 990     /* Now that we've loaded the binary, GUEST_BASE is fixed.  Delay
 991        generating the prologue until now so that the prologue can take
 992        the real value of GUEST_BASE into account.  */
 993     tcg_prologue_init(&tcg_ctx);
 994 #endif
 995
 996     /* build Task State */
 997     memset(ts, 0, sizeof(TaskState));
 998     init_task_state(ts);
 999     ts->info = info;
1000     env->opaque = ts;
1001
1002 #if defined(TARGET_I386)
1003     cpu_x86_set_cpl(env, 3);
1004
1005     env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
1006     env->hflags |= HF_PE_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(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(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_port) {
1135         gdbserver_start (gdbstub_port);
1136         gdb_handlesig(env, 0);
1137     }
1138     cpu_loop(env);
1139     /* never exits */
1140     return 0;
1141 }