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, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  19  *  MA 02110-1301, USA.
  20  */
  21 #include <stdlib.h>
  22 #include <stdio.h>
  23 #include <stdarg.h>
  24 #include <string.h>
  25 #include <errno.h>
  26 #include <unistd.h>
  27 #include <machine/trap.h>
  28 #include <sys/types.h>
  29 #include <sys/mman.h>
  30
  31 #include "qemu.h"
  32 #include "qemu-common.h"
  33 /* For tb_lock */
  34 #include "exec-all.h"
  35
  36 #define DEBUG_LOGFILE "/tmp/qemu.log"
  37
  38 int singlestep;
  39
  40 static const char *interp_prefix = CONFIG_QEMU_PREFIX;
  41 const char *qemu_uname_release = CONFIG_UNAME_RELEASE;
  42 extern char **environ;
  43
  44 /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
  45    we allocate a bigger stack. Need a better solution, for example
  46    by remapping the process stack directly at the right place */
  47 unsigned long x86_stack_size = 512 * 1024;
  48
  49 void gemu_log(const char *fmt, ...)
  50 {
  51     va_list ap;
  52
  53     va_start(ap, fmt);
  54     vfprintf(stderr, fmt, ap);
  55     va_end(ap);
  56 }
  57
  58 void cpu_outb(CPUState *env, int addr, int val)
  59 {
  60     fprintf(stderr, "outb: port=0x%04x, data=%02x\n", addr, val);
  61 }
  62
  63 void cpu_outw(CPUState *env, int addr, int val)
  64 {
  65     fprintf(stderr, "outw: port=0x%04x, data=%04x\n", addr, val);
  66 }
  67
  68 void cpu_outl(CPUState *env, int addr, int val)
  69 {
  70     fprintf(stderr, "outl: port=0x%04x, data=%08x\n", addr, val);
  71 }
  72
  73 int cpu_inb(CPUState *env, int addr)
  74 {
  75     fprintf(stderr, "inb: port=0x%04x\n", addr);
  76     return 0;
  77 }
  78
  79 int cpu_inw(CPUState *env, int addr)
  80 {
  81     fprintf(stderr, "inw: port=0x%04x\n", addr);
  82     return 0;
  83 }
  84
  85 int cpu_inl(CPUState *env, int addr)
  86 {
  87     fprintf(stderr, "inl: port=0x%04x\n", addr);
  88     return 0;
  89 }
  90
  91 #if defined(TARGET_I386)
  92 int cpu_get_pic_interrupt(CPUState *env)
  93 {
  94     return -1;
  95 }
  96 #endif
  97
  98 /* These are no-ops because we are not threadsafe.  */
  99 static inline void cpu_exec_start(CPUState *env)
 100 {
 101 }
 102
 103 static inline void cpu_exec_end(CPUState *env)
 104 {
 105 }
 106
 107 static inline void start_exclusive(void)
 108 {
 109 }
 110
 111 static inline void end_exclusive(void)
 112 {
 113 }
 114
 115 void fork_start(void)
 116 {
 117 }
 118
 119 void fork_end(int child)
 120 {
 121     if (child) {
 122         gdbserver_fork(thread_env);
 123     }
 124 }
 125
 126 void cpu_list_lock(void)
 127 {
 128 }
 129
 130 void cpu_list_unlock(void)
 131 {
 132 }
 133
 134 #ifdef TARGET_I386
 135 /***********************************************************/
 136 /* CPUX86 core interface */
 137
 138 void cpu_smm_update(CPUState *env)
 139 {
 140 }
 141
 142 uint64_t cpu_get_tsc(CPUX86State *env)
 143 {
 144     return cpu_get_real_ticks();
 145 }
 146
 147 static void write_dt(void *ptr, unsigned long addr, unsigned long limit,
 148                      int flags)
 149 {
 150     unsigned int e1, e2;
 151     uint32_t *p;
 152     e1 = (addr << 16) | (limit & 0xffff);
 153     e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
 154     e2 |= flags;
 155     p = ptr;
 156     p[0] = tswap32(e1);
 157     p[1] = tswap32(e2);
 158 }
 159
 160 static uint64_t *idt_table;
 161 #ifdef TARGET_X86_64
 162 static void set_gate64(void *ptr, unsigned int type, unsigned int dpl,
 163                        uint64_t addr, unsigned int sel)
 164 {
 165     uint32_t *p, e1, e2;
 166     e1 = (addr & 0xffff) | (sel << 16);
 167     e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
 168     p = ptr;
 169     p[0] = tswap32(e1);
 170     p[1] = tswap32(e2);
 171     p[2] = tswap32(addr >> 32);
 172     p[3] = 0;
 173 }
 174 /* only dpl matters as we do only user space emulation */
 175 static void set_idt(int n, unsigned int dpl)
 176 {
 177     set_gate64(idt_table + n * 2, 0, dpl, 0, 0);
 178 }
 179 #else
 180 static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
 181                      uint32_t addr, unsigned int sel)
 182 {
 183     uint32_t *p, e1, e2;
 184     e1 = (addr & 0xffff) | (sel << 16);
 185     e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
 186     p = ptr;
 187     p[0] = tswap32(e1);
 188     p[1] = tswap32(e2);
 189 }
 190
 191 /* only dpl matters as we do only user space emulation */
 192 static void set_idt(int n, unsigned int dpl)
 193 {
 194     set_gate(idt_table + n, 0, dpl, 0, 0);
 195 }
 196 #endif
 197
 198 void cpu_loop(CPUX86State *env, enum BSDType bsd_type)
 199 {
 200     int trapnr;
 201     abi_ulong pc;
 202     //target_siginfo_t info;
 203
 204     for(;;) {
 205         trapnr = cpu_x86_exec(env);
 206         switch(trapnr) {
 207         case 0x80:
 208             /* syscall from int $0x80 */
 209             env->regs[R_EAX] = do_openbsd_syscall(env,
 210                                                   env->regs[R_EAX],
 211                                                   env->regs[R_EBX],
 212                                                   env->regs[R_ECX],
 213                                                   env->regs[R_EDX],
 214                                                   env->regs[R_ESI],
 215                                                   env->regs[R_EDI],
 216                                                   env->regs[R_EBP]);
 217             break;
 218 #ifndef TARGET_ABI32
 219         case EXCP_SYSCALL:
 220             /* linux syscall from syscall intruction */
 221             env->regs[R_EAX] = do_openbsd_syscall(env,
 222                                                   env->regs[R_EAX],
 223                                                   env->regs[R_EDI],
 224                                                   env->regs[R_ESI],
 225                                                   env->regs[R_EDX],
 226                                                   env->regs[10],
 227                                                   env->regs[8],
 228                                                   env->regs[9]);
 229             env->eip = env->exception_next_eip;
 230             break;
 231 #endif
 232 #if 0
 233         case EXCP0B_NOSEG:
 234         case EXCP0C_STACK:
 235             info.si_signo = SIGBUS;
 236             info.si_errno = 0;
 237             info.si_code = TARGET_SI_KERNEL;
 238             info._sifields._sigfault._addr = 0;
 239             queue_signal(env, info.si_signo, &info);
 240             break;
 241         case EXCP0D_GPF:
 242             /* XXX: potential problem if ABI32 */
 243 #ifndef TARGET_X86_64
 244             if (env->eflags & VM_MASK) {
 245                 handle_vm86_fault(env);
 246             } else
 247 #endif
 248             {
 249                 info.si_signo = SIGSEGV;
 250                 info.si_errno = 0;
 251                 info.si_code = TARGET_SI_KERNEL;
 252                 info._sifields._sigfault._addr = 0;
 253                 queue_signal(env, info.si_signo, &info);
 254             }
 255             break;
 256         case EXCP0E_PAGE:
 257             info.si_signo = SIGSEGV;
 258             info.si_errno = 0;
 259             if (!(env->error_code & 1))
 260                 info.si_code = TARGET_SEGV_MAPERR;
 261             else
 262                 info.si_code = TARGET_SEGV_ACCERR;
 263             info._sifields._sigfault._addr = env->cr[2];
 264             queue_signal(env, info.si_signo, &info);
 265             break;
 266         case EXCP00_DIVZ:
 267 #ifndef TARGET_X86_64
 268             if (env->eflags & VM_MASK) {
 269                 handle_vm86_trap(env, trapnr);
 270             } else
 271 #endif
 272             {
 273                 /* division by zero */
 274                 info.si_signo = SIGFPE;
 275                 info.si_errno = 0;
 276                 info.si_code = TARGET_FPE_INTDIV;
 277                 info._sifields._sigfault._addr = env->eip;
 278                 queue_signal(env, info.si_signo, &info);
 279             }
 280             break;
 281         case EXCP01_DB:
 282         case EXCP03_INT3:
 283 #ifndef TARGET_X86_64
 284             if (env->eflags & VM_MASK) {
 285                 handle_vm86_trap(env, trapnr);
 286             } else
 287 #endif
 288             {
 289                 info.si_signo = SIGTRAP;
 290                 info.si_errno = 0;
 291                 if (trapnr == EXCP01_DB) {
 292                     info.si_code = TARGET_TRAP_BRKPT;
 293                     info._sifields._sigfault._addr = env->eip;
 294                 } else {
 295                     info.si_code = TARGET_SI_KERNEL;
 296                     info._sifields._sigfault._addr = 0;
 297                 }
 298                 queue_signal(env, info.si_signo, &info);
 299             }
 300             break;
 301         case EXCP04_INTO:
 302         case EXCP05_BOUND:
 303 #ifndef TARGET_X86_64
 304             if (env->eflags & VM_MASK) {
 305                 handle_vm86_trap(env, trapnr);
 306             } else
 307 #endif
 308             {
 309                 info.si_signo = SIGSEGV;
 310                 info.si_errno = 0;
 311                 info.si_code = TARGET_SI_KERNEL;
 312                 info._sifields._sigfault._addr = 0;
 313                 queue_signal(env, info.si_signo, &info);
 314             }
 315             break;
 316         case EXCP06_ILLOP:
 317             info.si_signo = SIGILL;
 318             info.si_errno = 0;
 319             info.si_code = TARGET_ILL_ILLOPN;
 320             info._sifields._sigfault._addr = env->eip;
 321             queue_signal(env, info.si_signo, &info);
 322             break;
 323 #endif
 324         case EXCP_INTERRUPT:
 325             /* just indicate that signals should be handled asap */
 326             break;
 327 #if 0
 328         case EXCP_DEBUG:
 329             {
 330                 int sig;
 331
 332                 sig = gdb_handlesig (env, TARGET_SIGTRAP);
 333                 if (sig)
 334                   {
 335                     info.si_signo = sig;
 336                     info.si_errno = 0;
 337                     info.si_code = TARGET_TRAP_BRKPT;
 338                     queue_signal(env, info.si_signo, &info);
 339                   }
 340             }
 341             break;
 342 #endif
 343         default:
 344             pc = env->segs[R_CS].base + env->eip;
 345             fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
 346                     (long)pc, trapnr);
 347             abort();
 348         }
 349         process_pending_signals(env);
 350     }
 351 }
 352 #endif
 353
 354 #ifdef TARGET_SPARC
 355 #define SPARC64_STACK_BIAS 2047
 356
 357 //#define DEBUG_WIN
 358 /* WARNING: dealing with register windows _is_ complicated. More info
 359    can be found at http://www.sics.se/~psm/sparcstack.html */
 360 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index)
 361 {
 362     index = (index + cwp * 16) % (16 * env->nwindows);
 363     /* wrap handling : if cwp is on the last window, then we use the
 364        registers 'after' the end */
 365     if (index < 8 && env->cwp == env->nwindows - 1)
 366         index += 16 * env->nwindows;
 367     return index;
 368 }
 369
 370 /* save the register window 'cwp1' */
 371 static inline void save_window_offset(CPUSPARCState *env, int cwp1)
 372 {
 373     unsigned int i;
 374     abi_ulong sp_ptr;
 375
 376     sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
 377 #ifdef TARGET_SPARC64
 378     if (sp_ptr & 3)
 379         sp_ptr += SPARC64_STACK_BIAS;
 380 #endif
 381 #if defined(DEBUG_WIN)
 382     printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n",
 383            sp_ptr, cwp1);
 384 #endif
 385     for(i = 0; i < 16; i++) {
 386         /* FIXME - what to do if put_user() fails? */
 387         put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
 388         sp_ptr += sizeof(abi_ulong);
 389     }
 390 }
 391
 392 static void save_window(CPUSPARCState *env)
 393 {
 394 #ifndef TARGET_SPARC64
 395     unsigned int new_wim;
 396     new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) &
 397         ((1LL << env->nwindows) - 1);
 398     save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
 399     env->wim = new_wim;
 400 #else
 401     save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
 402     env->cansave++;
 403     env->canrestore--;
 404 #endif
 405 }
 406
 407 static void restore_window(CPUSPARCState *env)
 408 {
 409 #ifndef TARGET_SPARC64
 410     unsigned int new_wim;
 411 #endif
 412     unsigned int i, cwp1;
 413     abi_ulong sp_ptr;
 414
 415 #ifndef TARGET_SPARC64
 416     new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) &
 417         ((1LL << env->nwindows) - 1);
 418 #endif
 419
 420     /* restore the invalid window */
 421     cwp1 = cpu_cwp_inc(env, env->cwp + 1);
 422     sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
 423 #ifdef TARGET_SPARC64
 424     if (sp_ptr & 3)
 425         sp_ptr += SPARC64_STACK_BIAS;
 426 #endif
 427 #if defined(DEBUG_WIN)
 428     printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n",
 429            sp_ptr, cwp1);
 430 #endif
 431     for(i = 0; i < 16; i++) {
 432         /* FIXME - what to do if get_user() fails? */
 433         get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
 434         sp_ptr += sizeof(abi_ulong);
 435     }
 436 #ifdef TARGET_SPARC64
 437     env->canrestore++;
 438     if (env->cleanwin < env->nwindows - 1)
 439         env->cleanwin++;
 440     env->cansave--;
 441 #else
 442     env->wim = new_wim;
 443 #endif
 444 }
 445
 446 static void flush_windows(CPUSPARCState *env)
 447 {
 448     int offset, cwp1;
 449
 450     offset = 1;
 451     for(;;) {
 452         /* if restore would invoke restore_window(), then we can stop */
 453         cwp1 = cpu_cwp_inc(env, env->cwp + offset);
 454 #ifndef TARGET_SPARC64
 455         if (env->wim & (1 << cwp1))
 456             break;
 457 #else
 458         if (env->canrestore == 0)
 459             break;
 460         env->cansave++;
 461         env->canrestore--;
 462 #endif
 463         save_window_offset(env, cwp1);
 464         offset++;
 465     }
 466     cwp1 = cpu_cwp_inc(env, env->cwp + 1);
 467 #ifndef TARGET_SPARC64
 468     /* set wim so that restore will reload the registers */
 469     env->wim = 1 << cwp1;
 470 #endif
 471 #if defined(DEBUG_WIN)
 472     printf("flush_windows: nb=%d\n", offset - 1);
 473 #endif
 474 }
 475
 476 void cpu_loop(CPUSPARCState *env, enum BSDType bsd_type)
 477 {
 478     int trapnr, ret, syscall_nr;
 479     //target_siginfo_t info;
 480
 481     while (1) {
 482         trapnr = cpu_sparc_exec (env);
 483
 484         switch (trapnr) {
 485 #ifndef TARGET_SPARC64
 486         case 0x80:
 487 #else
 488         case 0x100:
 489 #endif
 490             syscall_nr = env->gregs[1];
 491             if (bsd_type == target_freebsd)
 492                 ret = do_freebsd_syscall(env, syscall_nr,
 493                                          env->regwptr[0], env->regwptr[1],
 494                                          env->regwptr[2], env->regwptr[3],
 495                                          env->regwptr[4], env->regwptr[5]);
 496             else if (bsd_type == target_netbsd)
 497                 ret = do_netbsd_syscall(env, syscall_nr,
 498                                         env->regwptr[0], env->regwptr[1],
 499                                         env->regwptr[2], env->regwptr[3],
 500                                         env->regwptr[4], env->regwptr[5]);
 501             else { //if (bsd_type == target_openbsd)
 502 #if defined(TARGET_SPARC64)
 503                 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG |
 504                                 TARGET_OPENBSD_SYSCALL_G2RFLAG);
 505 #endif
 506                 ret = do_openbsd_syscall(env, syscall_nr,
 507                                          env->regwptr[0], env->regwptr[1],
 508                                          env->regwptr[2], env->regwptr[3],
 509                                          env->regwptr[4], env->regwptr[5]);
 510             }
 511             if ((unsigned int)ret >= (unsigned int)(-515)) {
 512 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
 513                 env->xcc |= PSR_CARRY;
 514 #else
 515                 env->psr |= PSR_CARRY;
 516 #endif
 517             } else {
 518 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
 519                 env->xcc &= ~PSR_CARRY;
 520 #else
 521                 env->psr &= ~PSR_CARRY;
 522 #endif
 523             }
 524             env->regwptr[0] = ret;
 525             /* next instruction */
 526 #if defined(TARGET_SPARC64)
 527             if (bsd_type == target_openbsd &&
 528                 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) {
 529                 env->pc = env->gregs[2];
 530                 env->npc = env->pc + 4;
 531             } else if (bsd_type == target_openbsd &&
 532                        env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) {
 533                 env->pc = env->gregs[7];
 534                 env->npc = env->pc + 4;
 535             } else {
 536                 env->pc = env->npc;
 537                 env->npc = env->npc + 4;
 538             }
 539 #else
 540             env->pc = env->npc;
 541             env->npc = env->npc + 4;
 542 #endif
 543             break;
 544         case 0x83: /* flush windows */
 545 #ifdef TARGET_ABI32
 546         case 0x103:
 547 #endif
 548             flush_windows(env);
 549             /* next instruction */
 550             env->pc = env->npc;
 551             env->npc = env->npc + 4;
 552             break;
 553 #ifndef TARGET_SPARC64
 554         case TT_WIN_OVF: /* window overflow */
 555             save_window(env);
 556             break;
 557         case TT_WIN_UNF: /* window underflow */
 558             restore_window(env);
 559             break;
 560         case TT_TFAULT:
 561         case TT_DFAULT:
 562 #if 0
 563             {
 564                 info.si_signo = SIGSEGV;
 565                 info.si_errno = 0;
 566                 /* XXX: check env->error_code */
 567                 info.si_code = TARGET_SEGV_MAPERR;
 568                 info._sifields._sigfault._addr = env->mmuregs[4];
 569                 queue_signal(env, info.si_signo, &info);
 570             }
 571 #endif
 572             break;
 573 #else
 574         case TT_SPILL: /* window overflow */
 575             save_window(env);
 576             break;
 577         case TT_FILL: /* window underflow */
 578             restore_window(env);
 579             break;
 580         case TT_TFAULT:
 581         case TT_DFAULT:
 582 #if 0
 583             {
 584                 info.si_signo = SIGSEGV;
 585                 info.si_errno = 0;
 586                 /* XXX: check env->error_code */
 587                 info.si_code = TARGET_SEGV_MAPERR;
 588                 if (trapnr == TT_DFAULT)
 589                     info._sifields._sigfault._addr = env->dmmuregs[4];
 590                 else
 591                     info._sifields._sigfault._addr = env->tsptr->tpc;
 592                 //queue_signal(env, info.si_signo, &info);
 593             }
 594 #endif
 595             break;
 596 #endif
 597         case EXCP_INTERRUPT:
 598             /* just indicate that signals should be handled asap */
 599             break;
 600         case EXCP_DEBUG:
 601             {
 602                 int sig;
 603
 604                 sig = gdb_handlesig (env, TARGET_SIGTRAP);
 605 #if 0
 606                 if (sig)
 607                   {
 608                     info.si_signo = sig;
 609                     info.si_errno = 0;
 610                     info.si_code = TARGET_TRAP_BRKPT;
 611                     //queue_signal(env, info.si_signo, &info);
 612                   }
 613 #endif
 614             }
 615             break;
 616         default:
 617             printf ("Unhandled trap: 0x%x\n", trapnr);
 618             cpu_dump_state(env, stderr, fprintf, 0);
 619             exit (1);
 620         }
 621         process_pending_signals (env);
 622     }
 623 }
 624
 625 #endif
 626
 627 static void usage(void)
 628 {
 629     printf("qemu-" TARGET_ARCH " version " QEMU_VERSION ", Copyright (c) 2003-2008 Fabrice Bellard\n"
 630            "usage: qemu-" TARGET_ARCH " [options] program [arguments...]\n"
 631            "BSD CPU emulator (compiled for %s emulation)\n"
 632            "\n"
 633            "Standard options:\n"
 634            "-h                print this help\n"
 635            "-g port           wait gdb connection to port\n"
 636            "-L path           set the elf interpreter prefix (default=%s)\n"
 637            "-s size           set the stack size in bytes (default=%ld)\n"
 638            "-cpu model        select CPU (-cpu ? for list)\n"
 639            "-drop-ld-preload  drop LD_PRELOAD for target process\n"
 640            "-bsd type         select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n"
 641            "\n"
 642            "Debug options:\n"
 643            "-d options   activate log (logfile=%s)\n"
 644            "-p pagesize  set the host page size to 'pagesize'\n"
 645            "-singlestep  always run in singlestep mode\n"
 646            "-strace      log system calls\n"
 647            "\n"
 648            "Environment variables:\n"
 649            "QEMU_STRACE       Print system calls and arguments similar to the\n"
 650            "                  'strace' program.  Enable by setting to any value.\n"
 651            ,
 652            TARGET_ARCH,
 653            interp_prefix,
 654            x86_stack_size,
 655            DEBUG_LOGFILE);
 656     exit(1);
 657 }
 658
 659 THREAD CPUState *thread_env;
 660
 661 /* Assumes contents are already zeroed.  */
 662 void init_task_state(TaskState *ts)
 663 {
 664     int i;
 665
 666     ts->used = 1;
 667     ts->first_free = ts->sigqueue_table;
 668     for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) {
 669         ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1];
 670     }
 671     ts->sigqueue_table[i].next = NULL;
 672 }
 673
 674 int main(int argc, char **argv)
 675 {
 676     const char *filename;
 677     const char *cpu_model;
 678     struct target_pt_regs regs1, *regs = &regs1;
 679     struct image_info info1, *info = &info1;
 680     TaskState ts1, *ts = &ts1;
 681     CPUState *env;
 682     int optind;
 683     const char *r;
 684     int gdbstub_port = 0;
 685     int drop_ld_preload = 0, environ_count = 0;
 686     char **target_environ, **wrk, **dst;
 687     enum BSDType bsd_type = target_openbsd;
 688
 689     if (argc <= 1)
 690         usage();
 691
 692     /* init debug */
 693     cpu_set_log_filename(DEBUG_LOGFILE);
 694
 695     cpu_model = NULL;
 696     optind = 1;
 697     for(;;) {
 698         if (optind >= argc)
 699             break;
 700         r = argv[optind];
 701         if (r[0] != '-')
 702             break;
 703         optind++;
 704         r++;
 705         if (!strcmp(r, "-")) {
 706             break;
 707         } else if (!strcmp(r, "d")) {
 708             int mask;
 709             const CPULogItem *item;
 710
 711             if (optind >= argc)
 712                 break;
 713
 714             r = argv[optind++];
 715             mask = cpu_str_to_log_mask(r);
 716             if (!mask) {
 717                 printf("Log items (comma separated):\n");
 718                 for(item = cpu_log_items; item->mask != 0; item++) {
 719                     printf("%-10s %s\n", item->name, item->help);
 720                 }
 721                 exit(1);
 722             }
 723             cpu_set_log(mask);
 724         } else if (!strcmp(r, "s")) {
 725             r = argv[optind++];
 726             x86_stack_size = strtol(r, (char **)&r, 0);
 727             if (x86_stack_size <= 0)
 728                 usage();
 729             if (*r == 'M')
 730                 x86_stack_size *= 1024 * 1024;
 731             else if (*r == 'k' || *r == 'K')
 732                 x86_stack_size *= 1024;
 733         } else if (!strcmp(r, "L")) {
 734             interp_prefix = argv[optind++];
 735         } else if (!strcmp(r, "p")) {
 736             qemu_host_page_size = atoi(argv[optind++]);
 737             if (qemu_host_page_size == 0 ||
 738                 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
 739                 fprintf(stderr, "page size must be a power of two\n");
 740                 exit(1);
 741             }
 742         } else if (!strcmp(r, "g")) {
 743             gdbstub_port = atoi(argv[optind++]);
 744         } else if (!strcmp(r, "r")) {
 745             qemu_uname_release = argv[optind++];
 746         } else if (!strcmp(r, "cpu")) {
 747             cpu_model = argv[optind++];
 748             if (strcmp(cpu_model, "?") == 0) {
 749 /* XXX: implement xxx_cpu_list for targets that still miss it */
 750 #if defined(cpu_list)
 751                     cpu_list(stdout, &fprintf);
 752 #endif
 753                 exit(1);
 754             }
 755         } else if (!strcmp(r, "drop-ld-preload")) {
 756             drop_ld_preload = 1;
 757         } else if (!strcmp(r, "bsd")) {
 758             if (!strcasecmp(argv[optind], "freebsd")) {
 759                 bsd_type = target_freebsd;
 760             } else if (!strcasecmp(argv[optind], "netbsd")) {
 761                 bsd_type = target_netbsd;
 762             } else if (!strcasecmp(argv[optind], "openbsd")) {
 763                 bsd_type = target_openbsd;
 764             } else {
 765                 usage();
 766             }
 767             optind++;
 768         } else if (!strcmp(r, "singlestep")) {
 769             singlestep = 1;
 770         } else if (!strcmp(r, "strace")) {
 771             do_strace = 1;
 772         } else
 773         {
 774             usage();
 775         }
 776     }
 777     if (optind >= argc)
 778         usage();
 779     filename = argv[optind];
 780
 781     /* Zero out regs */
 782     memset(regs, 0, sizeof(struct target_pt_regs));
 783
 784     /* Zero out image_info */
 785     memset(info, 0, sizeof(struct image_info));
 786
 787     /* Scan interp_prefix dir for replacement files. */
 788     init_paths(interp_prefix);
 789
 790     if (cpu_model == NULL) {
 791 #if defined(TARGET_I386)
 792 #ifdef TARGET_X86_64
 793         cpu_model = "qemu64";
 794 #else
 795         cpu_model = "qemu32";
 796 #endif
 797 #elif defined(TARGET_SPARC)
 798 #ifdef TARGET_SPARC64
 799         cpu_model = "TI UltraSparc II";
 800 #else
 801         cpu_model = "Fujitsu MB86904";
 802 #endif
 803 #else
 804         cpu_model = "any";
 805 #endif
 806     }
 807     cpu_exec_init_all(0);
 808     /* NOTE: we need to init the CPU at this stage to get
 809        qemu_host_page_size */
 810     env = cpu_init(cpu_model);
 811     if (!env) {
 812         fprintf(stderr, "Unable to find CPU definition\n");
 813         exit(1);
 814     }
 815     thread_env = env;
 816
 817     if (getenv("QEMU_STRACE")) {
 818         do_strace = 1;
 819     }
 820
 821     wrk = environ;
 822     while (*(wrk++))
 823         environ_count++;
 824
 825     target_environ = malloc((environ_count + 1) * sizeof(char *));
 826     if (!target_environ)
 827         abort();
 828     for (wrk = environ, dst = target_environ; *wrk; wrk++) {
 829         if (drop_ld_preload && !strncmp(*wrk, "LD_PRELOAD=", 11))
 830             continue;
 831         *(dst++) = strdup(*wrk);
 832     }
 833     *dst = NULL; /* NULL terminate target_environ */
 834
 835     if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) {
 836         printf("Error loading %s\n", filename);
 837         _exit(1);
 838     }
 839
 840     for (wrk = target_environ; *wrk; wrk++) {
 841         free(*wrk);
 842     }
 843
 844     free(target_environ);
 845
 846     if (qemu_log_enabled()) {
 847         log_page_dump();
 848
 849         qemu_log("start_brk   0x" TARGET_ABI_FMT_lx "\n", info->start_brk);
 850         qemu_log("end_code    0x" TARGET_ABI_FMT_lx "\n", info->end_code);
 851         qemu_log("start_code  0x" TARGET_ABI_FMT_lx "\n",
 852                  info->start_code);
 853         qemu_log("start_data  0x" TARGET_ABI_FMT_lx "\n",
 854                  info->start_data);
 855         qemu_log("end_data    0x" TARGET_ABI_FMT_lx "\n", info->end_data);
 856         qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n",
 857                  info->start_stack);
 858         qemu_log("brk         0x" TARGET_ABI_FMT_lx "\n", info->brk);
 859         qemu_log("entry       0x" TARGET_ABI_FMT_lx "\n", info->entry);
 860     }
 861
 862     target_set_brk(info->brk);
 863     syscall_init();
 864     signal_init();
 865
 866     /* build Task State */
 867     memset(ts, 0, sizeof(TaskState));
 868     init_task_state(ts);
 869     ts->info = info;
 870     env->opaque = ts;
 871
 872 #if defined(TARGET_I386)
 873     cpu_x86_set_cpl(env, 3);
 874
 875     env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
 876     env->hflags |= HF_PE_MASK;
 877     if (env->cpuid_features & CPUID_SSE) {
 878         env->cr[4] |= CR4_OSFXSR_MASK;
 879         env->hflags |= HF_OSFXSR_MASK;
 880     }
 881 #ifndef TARGET_ABI32
 882     /* enable 64 bit mode if possible */
 883     if (!(env->cpuid_ext2_features & CPUID_EXT2_LM)) {
 884         fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n");
 885         exit(1);
 886     }
 887     env->cr[4] |= CR4_PAE_MASK;
 888     env->efer |= MSR_EFER_LMA | MSR_EFER_LME;
 889     env->hflags |= HF_LMA_MASK;
 890 #endif
 891
 892     /* flags setup : we activate the IRQs by default as in user mode */
 893     env->eflags |= IF_MASK;
 894
 895     /* linux register setup */
 896 #ifndef TARGET_ABI32
 897     env->regs[R_EAX] = regs->rax;
 898     env->regs[R_EBX] = regs->rbx;
 899     env->regs[R_ECX] = regs->rcx;
 900     env->regs[R_EDX] = regs->rdx;
 901     env->regs[R_ESI] = regs->rsi;
 902     env->regs[R_EDI] = regs->rdi;
 903     env->regs[R_EBP] = regs->rbp;
 904     env->regs[R_ESP] = regs->rsp;
 905     env->eip = regs->rip;
 906 #else
 907     env->regs[R_EAX] = regs->eax;
 908     env->regs[R_EBX] = regs->ebx;
 909     env->regs[R_ECX] = regs->ecx;
 910     env->regs[R_EDX] = regs->edx;
 911     env->regs[R_ESI] = regs->esi;
 912     env->regs[R_EDI] = regs->edi;
 913     env->regs[R_EBP] = regs->ebp;
 914     env->regs[R_ESP] = regs->esp;
 915     env->eip = regs->eip;
 916 #endif
 917
 918     /* linux interrupt setup */
 919 #ifndef TARGET_ABI32
 920     env->idt.limit = 511;
 921 #else
 922     env->idt.limit = 255;
 923 #endif
 924     env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1),
 925                                 PROT_READ|PROT_WRITE,
 926                                 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
 927     idt_table = g2h(env->idt.base);
 928     set_idt(0, 0);
 929     set_idt(1, 0);
 930     set_idt(2, 0);
 931     set_idt(3, 3);
 932     set_idt(4, 3);
 933     set_idt(5, 0);
 934     set_idt(6, 0);
 935     set_idt(7, 0);
 936     set_idt(8, 0);
 937     set_idt(9, 0);
 938     set_idt(10, 0);
 939     set_idt(11, 0);
 940     set_idt(12, 0);
 941     set_idt(13, 0);
 942     set_idt(14, 0);
 943     set_idt(15, 0);
 944     set_idt(16, 0);
 945     set_idt(17, 0);
 946     set_idt(18, 0);
 947     set_idt(19, 0);
 948     set_idt(0x80, 3);
 949
 950     /* linux segment setup */
 951     {
 952         uint64_t *gdt_table;
 953         env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES,
 954                                     PROT_READ|PROT_WRITE,
 955                                     MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
 956         env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1;
 957         gdt_table = g2h(env->gdt.base);
 958 #ifdef TARGET_ABI32
 959         write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
 960                  DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
 961                  (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
 962 #else
 963         /* 64 bit code segment */
 964         write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
 965                  DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
 966                  DESC_L_MASK |
 967                  (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
 968 #endif
 969         write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff,
 970                  DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
 971                  (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
 972     }
 973
 974     cpu_x86_load_seg(env, R_CS, __USER_CS);
 975     cpu_x86_load_seg(env, R_SS, __USER_DS);
 976 #ifdef TARGET_ABI32
 977     cpu_x86_load_seg(env, R_DS, __USER_DS);
 978     cpu_x86_load_seg(env, R_ES, __USER_DS);
 979     cpu_x86_load_seg(env, R_FS, __USER_DS);
 980     cpu_x86_load_seg(env, R_GS, __USER_DS);
 981     /* This hack makes Wine work... */
 982     env->segs[R_FS].selector = 0;
 983 #else
 984     cpu_x86_load_seg(env, R_DS, 0);
 985     cpu_x86_load_seg(env, R_ES, 0);
 986     cpu_x86_load_seg(env, R_FS, 0);
 987     cpu_x86_load_seg(env, R_GS, 0);
 988 #endif
 989 #elif defined(TARGET_SPARC)
 990     {
 991         int i;
 992         env->pc = regs->pc;
 993         env->npc = regs->npc;
 994         env->y = regs->y;
 995         for(i = 0; i < 8; i++)
 996             env->gregs[i] = regs->u_regs[i];
 997         for(i = 0; i < 8; i++)
 998             env->regwptr[i] = regs->u_regs[i + 8];
 999     }
1000 #else
1001 #error unsupported target CPU
1002 #endif
1003
1004     if (gdbstub_port) {
1005         gdbserver_start (gdbstub_port);
1006         gdb_handlesig(env, 0);
1007     }
1008     cpu_loop(env, bsd_type);
1009     /* never exits */
1010     return 0;
1011 }