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
  41 static const char *interp_prefix = CONFIG_QEMU_PREFIX;
  42 const char *qemu_uname_release = CONFIG_UNAME_RELEASE;
  43 extern char **environ;
  44
  45 /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
  46    we allocate a bigger stack. Need a better solution, for example
  47    by remapping the process stack directly at the right place */
  48 unsigned long x86_stack_size = 512 * 1024;
  49
  50 void gemu_log(const char *fmt, ...)
  51 {
  52     va_list ap;
  53
  54     va_start(ap, fmt);
  55     vfprintf(stderr, fmt, ap);
  56     va_end(ap);
  57 }
  58
  59 #if defined(TARGET_I386)
  60 int cpu_get_pic_interrupt(CPUState *env)
  61 {
  62     return -1;
  63 }
  64 #endif
  65
  66 /* These are no-ops because we are not threadsafe.  */
  67 static inline void cpu_exec_start(CPUState *env)
  68 {
  69 }
  70
  71 static inline void cpu_exec_end(CPUState *env)
  72 {
  73 }
  74
  75 static inline void start_exclusive(void)
  76 {
  77 }
  78
  79 static inline void end_exclusive(void)
  80 {
  81 }
  82
  83 void fork_start(void)
  84 {
  85 }
  86
  87 void fork_end(int child)
  88 {
  89     if (child) {
  90         gdbserver_fork(thread_env);
  91     }
  92 }
  93
  94 void cpu_list_lock(void)
  95 {
  96 }
  97
  98 void cpu_list_unlock(void)
  99 {
 100 }
 101
 102 #ifdef TARGET_I386
 103 /***********************************************************/
 104 /* CPUX86 core interface */
 105
 106 void cpu_smm_update(CPUState *env)
 107 {
 108 }
 109
 110 uint64_t cpu_get_tsc(CPUX86State *env)
 111 {
 112     return cpu_get_real_ticks();
 113 }
 114
 115 static void write_dt(void *ptr, unsigned long addr, unsigned long limit,
 116                      int flags)
 117 {
 118     unsigned int e1, e2;
 119     uint32_t *p;
 120     e1 = (addr << 16) | (limit & 0xffff);
 121     e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
 122     e2 |= flags;
 123     p = ptr;
 124     p[0] = tswap32(e1);
 125     p[1] = tswap32(e2);
 126 }
 127
 128 static uint64_t *idt_table;
 129 #ifdef TARGET_X86_64
 130 static void set_gate64(void *ptr, unsigned int type, unsigned int dpl,
 131                        uint64_t addr, unsigned int sel)
 132 {
 133     uint32_t *p, e1, e2;
 134     e1 = (addr & 0xffff) | (sel << 16);
 135     e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
 136     p = ptr;
 137     p[0] = tswap32(e1);
 138     p[1] = tswap32(e2);
 139     p[2] = tswap32(addr >> 32);
 140     p[3] = 0;
 141 }
 142 /* only dpl matters as we do only user space emulation */
 143 static void set_idt(int n, unsigned int dpl)
 144 {
 145     set_gate64(idt_table + n * 2, 0, dpl, 0, 0);
 146 }
 147 #else
 148 static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
 149                      uint32_t addr, unsigned int sel)
 150 {
 151     uint32_t *p, e1, e2;
 152     e1 = (addr & 0xffff) | (sel << 16);
 153     e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
 154     p = ptr;
 155     p[0] = tswap32(e1);
 156     p[1] = tswap32(e2);
 157 }
 158
 159 /* only dpl matters as we do only user space emulation */
 160 static void set_idt(int n, unsigned int dpl)
 161 {
 162     set_gate(idt_table + n, 0, dpl, 0, 0);
 163 }
 164 #endif
 165
 166 void cpu_loop(CPUX86State *env, enum BSDType bsd_type)
 167 {
 168     int trapnr;
 169     abi_ulong pc;
 170     //target_siginfo_t info;
 171
 172     for(;;) {
 173         trapnr = cpu_x86_exec(env);
 174         switch(trapnr) {
 175         case 0x80:
 176             /* syscall from int $0x80 */
 177             env->regs[R_EAX] = do_openbsd_syscall(env,
 178                                                   env->regs[R_EAX],
 179                                                   env->regs[R_EBX],
 180                                                   env->regs[R_ECX],
 181                                                   env->regs[R_EDX],
 182                                                   env->regs[R_ESI],
 183                                                   env->regs[R_EDI],
 184                                                   env->regs[R_EBP]);
 185             break;
 186 #ifndef TARGET_ABI32
 187         case EXCP_SYSCALL:
 188             /* linux syscall from syscall intruction */
 189             env->regs[R_EAX] = do_openbsd_syscall(env,
 190                                                   env->regs[R_EAX],
 191                                                   env->regs[R_EDI],
 192                                                   env->regs[R_ESI],
 193                                                   env->regs[R_EDX],
 194                                                   env->regs[10],
 195                                                   env->regs[8],
 196                                                   env->regs[9]);
 197             env->eip = env->exception_next_eip;
 198             break;
 199 #endif
 200 #if 0
 201         case EXCP0B_NOSEG:
 202         case EXCP0C_STACK:
 203             info.si_signo = SIGBUS;
 204             info.si_errno = 0;
 205             info.si_code = TARGET_SI_KERNEL;
 206             info._sifields._sigfault._addr = 0;
 207             queue_signal(env, info.si_signo, &info);
 208             break;
 209         case EXCP0D_GPF:
 210             /* XXX: potential problem if ABI32 */
 211 #ifndef TARGET_X86_64
 212             if (env->eflags & VM_MASK) {
 213                 handle_vm86_fault(env);
 214             } else
 215 #endif
 216             {
 217                 info.si_signo = SIGSEGV;
 218                 info.si_errno = 0;
 219                 info.si_code = TARGET_SI_KERNEL;
 220                 info._sifields._sigfault._addr = 0;
 221                 queue_signal(env, info.si_signo, &info);
 222             }
 223             break;
 224         case EXCP0E_PAGE:
 225             info.si_signo = SIGSEGV;
 226             info.si_errno = 0;
 227             if (!(env->error_code & 1))
 228                 info.si_code = TARGET_SEGV_MAPERR;
 229             else
 230                 info.si_code = TARGET_SEGV_ACCERR;
 231             info._sifields._sigfault._addr = env->cr[2];
 232             queue_signal(env, info.si_signo, &info);
 233             break;
 234         case EXCP00_DIVZ:
 235 #ifndef TARGET_X86_64
 236             if (env->eflags & VM_MASK) {
 237                 handle_vm86_trap(env, trapnr);
 238             } else
 239 #endif
 240             {
 241                 /* division by zero */
 242                 info.si_signo = SIGFPE;
 243                 info.si_errno = 0;
 244                 info.si_code = TARGET_FPE_INTDIV;
 245                 info._sifields._sigfault._addr = env->eip;
 246                 queue_signal(env, info.si_signo, &info);
 247             }
 248             break;
 249         case EXCP01_DB:
 250         case EXCP03_INT3:
 251 #ifndef TARGET_X86_64
 252             if (env->eflags & VM_MASK) {
 253                 handle_vm86_trap(env, trapnr);
 254             } else
 255 #endif
 256             {
 257                 info.si_signo = SIGTRAP;
 258                 info.si_errno = 0;
 259                 if (trapnr == EXCP01_DB) {
 260                     info.si_code = TARGET_TRAP_BRKPT;
 261                     info._sifields._sigfault._addr = env->eip;
 262                 } else {
 263                     info.si_code = TARGET_SI_KERNEL;
 264                     info._sifields._sigfault._addr = 0;
 265                 }
 266                 queue_signal(env, info.si_signo, &info);
 267             }
 268             break;
 269         case EXCP04_INTO:
 270         case EXCP05_BOUND:
 271 #ifndef TARGET_X86_64
 272             if (env->eflags & VM_MASK) {
 273                 handle_vm86_trap(env, trapnr);
 274             } else
 275 #endif
 276             {
 277                 info.si_signo = SIGSEGV;
 278                 info.si_errno = 0;
 279                 info.si_code = TARGET_SI_KERNEL;
 280                 info._sifields._sigfault._addr = 0;
 281                 queue_signal(env, info.si_signo, &info);
 282             }
 283             break;
 284         case EXCP06_ILLOP:
 285             info.si_signo = SIGILL;
 286             info.si_errno = 0;
 287             info.si_code = TARGET_ILL_ILLOPN;
 288             info._sifields._sigfault._addr = env->eip;
 289             queue_signal(env, info.si_signo, &info);
 290             break;
 291 #endif
 292         case EXCP_INTERRUPT:
 293             /* just indicate that signals should be handled asap */
 294             break;
 295 #if 0
 296         case EXCP_DEBUG:
 297             {
 298                 int sig;
 299
 300                 sig = gdb_handlesig (env, TARGET_SIGTRAP);
 301                 if (sig)
 302                   {
 303                     info.si_signo = sig;
 304                     info.si_errno = 0;
 305                     info.si_code = TARGET_TRAP_BRKPT;
 306                     queue_signal(env, info.si_signo, &info);
 307                   }
 308             }
 309             break;
 310 #endif
 311         default:
 312             pc = env->segs[R_CS].base + env->eip;
 313             fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
 314                     (long)pc, trapnr);
 315             abort();
 316         }
 317         process_pending_signals(env);
 318     }
 319 }
 320 #endif
 321
 322 #ifdef TARGET_SPARC
 323 #define SPARC64_STACK_BIAS 2047
 324
 325 //#define DEBUG_WIN
 326 /* WARNING: dealing with register windows _is_ complicated. More info
 327    can be found at http://www.sics.se/~psm/sparcstack.html */
 328 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index)
 329 {
 330     index = (index + cwp * 16) % (16 * env->nwindows);
 331     /* wrap handling : if cwp is on the last window, then we use the
 332        registers 'after' the end */
 333     if (index < 8 && env->cwp == env->nwindows - 1)
 334         index += 16 * env->nwindows;
 335     return index;
 336 }
 337
 338 /* save the register window 'cwp1' */
 339 static inline void save_window_offset(CPUSPARCState *env, int cwp1)
 340 {
 341     unsigned int i;
 342     abi_ulong sp_ptr;
 343
 344     sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
 345 #ifdef TARGET_SPARC64
 346     if (sp_ptr & 3)
 347         sp_ptr += SPARC64_STACK_BIAS;
 348 #endif
 349 #if defined(DEBUG_WIN)
 350     printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n",
 351            sp_ptr, cwp1);
 352 #endif
 353     for(i = 0; i < 16; i++) {
 354         /* FIXME - what to do if put_user() fails? */
 355         put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
 356         sp_ptr += sizeof(abi_ulong);
 357     }
 358 }
 359
 360 static void save_window(CPUSPARCState *env)
 361 {
 362 #ifndef TARGET_SPARC64
 363     unsigned int new_wim;
 364     new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) &
 365         ((1LL << env->nwindows) - 1);
 366     save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
 367     env->wim = new_wim;
 368 #else
 369     save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
 370     env->cansave++;
 371     env->canrestore--;
 372 #endif
 373 }
 374
 375 static void restore_window(CPUSPARCState *env)
 376 {
 377 #ifndef TARGET_SPARC64
 378     unsigned int new_wim;
 379 #endif
 380     unsigned int i, cwp1;
 381     abi_ulong sp_ptr;
 382
 383 #ifndef TARGET_SPARC64
 384     new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) &
 385         ((1LL << env->nwindows) - 1);
 386 #endif
 387
 388     /* restore the invalid window */
 389     cwp1 = cpu_cwp_inc(env, env->cwp + 1);
 390     sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
 391 #ifdef TARGET_SPARC64
 392     if (sp_ptr & 3)
 393         sp_ptr += SPARC64_STACK_BIAS;
 394 #endif
 395 #if defined(DEBUG_WIN)
 396     printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n",
 397            sp_ptr, cwp1);
 398 #endif
 399     for(i = 0; i < 16; i++) {
 400         /* FIXME - what to do if get_user() fails? */
 401         get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
 402         sp_ptr += sizeof(abi_ulong);
 403     }
 404 #ifdef TARGET_SPARC64
 405     env->canrestore++;
 406     if (env->cleanwin < env->nwindows - 1)
 407         env->cleanwin++;
 408     env->cansave--;
 409 #else
 410     env->wim = new_wim;
 411 #endif
 412 }
 413
 414 static void flush_windows(CPUSPARCState *env)
 415 {
 416     int offset, cwp1;
 417
 418     offset = 1;
 419     for(;;) {
 420         /* if restore would invoke restore_window(), then we can stop */
 421         cwp1 = cpu_cwp_inc(env, env->cwp + offset);
 422 #ifndef TARGET_SPARC64
 423         if (env->wim & (1 << cwp1))
 424             break;
 425 #else
 426         if (env->canrestore == 0)
 427             break;
 428         env->cansave++;
 429         env->canrestore--;
 430 #endif
 431         save_window_offset(env, cwp1);
 432         offset++;
 433     }
 434     cwp1 = cpu_cwp_inc(env, env->cwp + 1);
 435 #ifndef TARGET_SPARC64
 436     /* set wim so that restore will reload the registers */
 437     env->wim = 1 << cwp1;
 438 #endif
 439 #if defined(DEBUG_WIN)
 440     printf("flush_windows: nb=%d\n", offset - 1);
 441 #endif
 442 }
 443
 444 void cpu_loop(CPUSPARCState *env, enum BSDType bsd_type)
 445 {
 446     int trapnr, ret, syscall_nr;
 447     //target_siginfo_t info;
 448
 449     while (1) {
 450         trapnr = cpu_sparc_exec (env);
 451
 452         switch (trapnr) {
 453 #ifndef TARGET_SPARC64
 454         case 0x80:
 455 #else
 456         case 0x100:
 457 #endif
 458             syscall_nr = env->gregs[1];
 459             if (bsd_type == target_freebsd)
 460                 ret = do_freebsd_syscall(env, syscall_nr,
 461                                          env->regwptr[0], env->regwptr[1],
 462                                          env->regwptr[2], env->regwptr[3],
 463                                          env->regwptr[4], env->regwptr[5]);
 464             else if (bsd_type == target_netbsd)
 465                 ret = do_netbsd_syscall(env, syscall_nr,
 466                                         env->regwptr[0], env->regwptr[1],
 467                                         env->regwptr[2], env->regwptr[3],
 468                                         env->regwptr[4], env->regwptr[5]);
 469             else { //if (bsd_type == target_openbsd)
 470 #if defined(TARGET_SPARC64)
 471                 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG |
 472                                 TARGET_OPENBSD_SYSCALL_G2RFLAG);
 473 #endif
 474                 ret = do_openbsd_syscall(env, syscall_nr,
 475                                          env->regwptr[0], env->regwptr[1],
 476                                          env->regwptr[2], env->regwptr[3],
 477                                          env->regwptr[4], env->regwptr[5]);
 478             }
 479             if ((unsigned int)ret >= (unsigned int)(-515)) {
 480 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
 481                 env->xcc |= PSR_CARRY;
 482 #else
 483                 env->psr |= PSR_CARRY;
 484 #endif
 485             } else {
 486 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
 487                 env->xcc &= ~PSR_CARRY;
 488 #else
 489                 env->psr &= ~PSR_CARRY;
 490 #endif
 491             }
 492             env->regwptr[0] = ret;
 493             /* next instruction */
 494 #if defined(TARGET_SPARC64)
 495             if (bsd_type == target_openbsd &&
 496                 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) {
 497                 env->pc = env->gregs[2];
 498                 env->npc = env->pc + 4;
 499             } else if (bsd_type == target_openbsd &&
 500                        env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) {
 501                 env->pc = env->gregs[7];
 502                 env->npc = env->pc + 4;
 503             } else {
 504                 env->pc = env->npc;
 505                 env->npc = env->npc + 4;
 506             }
 507 #else
 508             env->pc = env->npc;
 509             env->npc = env->npc + 4;
 510 #endif
 511             break;
 512         case 0x83: /* flush windows */
 513 #ifdef TARGET_ABI32
 514         case 0x103:
 515 #endif
 516             flush_windows(env);
 517             /* next instruction */
 518             env->pc = env->npc;
 519             env->npc = env->npc + 4;
 520             break;
 521 #ifndef TARGET_SPARC64
 522         case TT_WIN_OVF: /* window overflow */
 523             save_window(env);
 524             break;
 525         case TT_WIN_UNF: /* window underflow */
 526             restore_window(env);
 527             break;
 528         case TT_TFAULT:
 529         case TT_DFAULT:
 530 #if 0
 531             {
 532                 info.si_signo = SIGSEGV;
 533                 info.si_errno = 0;
 534                 /* XXX: check env->error_code */
 535                 info.si_code = TARGET_SEGV_MAPERR;
 536                 info._sifields._sigfault._addr = env->mmuregs[4];
 537                 queue_signal(env, info.si_signo, &info);
 538             }
 539 #endif
 540             break;
 541 #else
 542         case TT_SPILL: /* window overflow */
 543             save_window(env);
 544             break;
 545         case TT_FILL: /* window underflow */
 546             restore_window(env);
 547             break;
 548         case TT_TFAULT:
 549         case TT_DFAULT:
 550 #if 0
 551             {
 552                 info.si_signo = SIGSEGV;
 553                 info.si_errno = 0;
 554                 /* XXX: check env->error_code */
 555                 info.si_code = TARGET_SEGV_MAPERR;
 556                 if (trapnr == TT_DFAULT)
 557                     info._sifields._sigfault._addr = env->dmmuregs[4];
 558                 else
 559                     info._sifields._sigfault._addr = env->tsptr->tpc;
 560                 //queue_signal(env, info.si_signo, &info);
 561             }
 562 #endif
 563             break;
 564 #endif
 565         case EXCP_INTERRUPT:
 566             /* just indicate that signals should be handled asap */
 567             break;
 568         case EXCP_DEBUG:
 569             {
 570                 int sig;
 571
 572                 sig = gdb_handlesig (env, TARGET_SIGTRAP);
 573 #if 0
 574                 if (sig)
 575                   {
 576                     info.si_signo = sig;
 577                     info.si_errno = 0;
 578                     info.si_code = TARGET_TRAP_BRKPT;
 579                     //queue_signal(env, info.si_signo, &info);
 580                   }
 581 #endif
 582             }
 583             break;
 584         default:
 585             printf ("Unhandled trap: 0x%x\n", trapnr);
 586             cpu_dump_state(env, stderr, fprintf, 0);
 587             exit (1);
 588         }
 589         process_pending_signals (env);
 590     }
 591 }
 592
 593 #endif
 594
 595 static void usage(void)
 596 {
 597     printf("qemu-" TARGET_ARCH " version " QEMU_VERSION ", Copyright (c) 2003-2008 Fabrice Bellard\n"
 598            "usage: qemu-" TARGET_ARCH " [options] program [arguments...]\n"
 599            "BSD CPU emulator (compiled for %s emulation)\n"
 600            "\n"
 601            "Standard options:\n"
 602            "-h                print this help\n"
 603            "-g port           wait gdb connection to port\n"
 604            "-L path           set the elf interpreter prefix (default=%s)\n"
 605            "-s size           set the stack size in bytes (default=%ld)\n"
 606            "-cpu model        select CPU (-cpu ? for list)\n"
 607            "-drop-ld-preload  drop LD_PRELOAD for target process\n"
 608            "-E var=value      sets/modifies targets environment variable(s)\n"
 609            "-U var            unsets targets environment variable(s)\n"
 610            "-bsd type         select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n"
 611            "\n"
 612            "Debug options:\n"
 613            "-d options   activate log (logfile=%s)\n"
 614            "-p pagesize  set the host page size to 'pagesize'\n"
 615            "-singlestep  always run in singlestep mode\n"
 616            "-strace      log system calls\n"
 617            "\n"
 618            "Environment variables:\n"
 619            "QEMU_STRACE       Print system calls and arguments similar to the\n"
 620            "                  'strace' program.  Enable by setting to any value.\n"
 621            "You can use -E and -U options to set/unset environment variables\n"
 622            "for target process.  It is possible to provide several variables\n"
 623            "by repeating the option.  For example:\n"
 624            "    -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n"
 625            "Note that if you provide several changes to single variable\n"
 626            "last change will stay in effect.\n"
 627            ,
 628            TARGET_ARCH,
 629            interp_prefix,
 630            x86_stack_size,
 631            DEBUG_LOGFILE);
 632     exit(1);
 633 }
 634
 635 THREAD CPUState *thread_env;
 636
 637 /* Assumes contents are already zeroed.  */
 638 void init_task_state(TaskState *ts)
 639 {
 640     int i;
 641
 642     ts->used = 1;
 643     ts->first_free = ts->sigqueue_table;
 644     for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) {
 645         ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1];
 646     }
 647     ts->sigqueue_table[i].next = NULL;
 648 }
 649
 650 int main(int argc, char **argv)
 651 {
 652     const char *filename;
 653     const char *cpu_model;
 654     struct target_pt_regs regs1, *regs = &regs1;
 655     struct image_info info1, *info = &info1;
 656     TaskState ts1, *ts = &ts1;
 657     CPUState *env;
 658     int optind;
 659     const char *r;
 660     int gdbstub_port = 0;
 661     char **target_environ, **wrk;
 662     envlist_t *envlist = NULL;
 663     enum BSDType bsd_type = target_openbsd;
 664
 665     if (argc <= 1)
 666         usage();
 667
 668     /* init debug */
 669     cpu_set_log_filename(DEBUG_LOGFILE);
 670
 671     if ((envlist = envlist_create()) == NULL) {
 672         (void) fprintf(stderr, "Unable to allocate envlist\n");
 673         exit(1);
 674     }
 675
 676     /* add current environment into the list */
 677     for (wrk = environ; *wrk != NULL; wrk++) {
 678         (void) envlist_setenv(envlist, *wrk);
 679     }
 680
 681     cpu_model = NULL;
 682     optind = 1;
 683     for(;;) {
 684         if (optind >= argc)
 685             break;
 686         r = argv[optind];
 687         if (r[0] != '-')
 688             break;
 689         optind++;
 690         r++;
 691         if (!strcmp(r, "-")) {
 692             break;
 693         } else if (!strcmp(r, "d")) {
 694             int mask;
 695             const CPULogItem *item;
 696
 697             if (optind >= argc)
 698                 break;
 699
 700             r = argv[optind++];
 701             mask = cpu_str_to_log_mask(r);
 702             if (!mask) {
 703                 printf("Log items (comma separated):\n");
 704                 for(item = cpu_log_items; item->mask != 0; item++) {
 705                     printf("%-10s %s\n", item->name, item->help);
 706                 }
 707                 exit(1);
 708             }
 709             cpu_set_log(mask);
 710         } else if (!strcmp(r, "E")) {
 711             r = argv[optind++];
 712             if (envlist_setenv(envlist, r) != 0)
 713                 usage();
 714         } else if (!strcmp(r, "U")) {
 715             r = argv[optind++];
 716             if (envlist_unsetenv(envlist, r) != 0)
 717                 usage();
 718         } else if (!strcmp(r, "s")) {
 719             r = argv[optind++];
 720             x86_stack_size = strtol(r, (char **)&r, 0);
 721             if (x86_stack_size <= 0)
 722                 usage();
 723             if (*r == 'M')
 724                 x86_stack_size *= 1024 * 1024;
 725             else if (*r == 'k' || *r == 'K')
 726                 x86_stack_size *= 1024;
 727         } else if (!strcmp(r, "L")) {
 728             interp_prefix = argv[optind++];
 729         } else if (!strcmp(r, "p")) {
 730             qemu_host_page_size = atoi(argv[optind++]);
 731             if (qemu_host_page_size == 0 ||
 732                 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
 733                 fprintf(stderr, "page size must be a power of two\n");
 734                 exit(1);
 735             }
 736         } else if (!strcmp(r, "g")) {
 737             gdbstub_port = atoi(argv[optind++]);
 738         } else if (!strcmp(r, "r")) {
 739             qemu_uname_release = argv[optind++];
 740         } else if (!strcmp(r, "cpu")) {
 741             cpu_model = argv[optind++];
 742             if (strcmp(cpu_model, "?") == 0) {
 743 /* XXX: implement xxx_cpu_list for targets that still miss it */
 744 #if defined(cpu_list)
 745                     cpu_list(stdout, &fprintf);
 746 #endif
 747                 exit(1);
 748             }
 749         } else if (!strcmp(r, "drop-ld-preload")) {
 750             (void) envlist_unsetenv(envlist, "LD_PRELOAD");
 751         } else if (!strcmp(r, "bsd")) {
 752             if (!strcasecmp(argv[optind], "freebsd")) {
 753                 bsd_type = target_freebsd;
 754             } else if (!strcasecmp(argv[optind], "netbsd")) {
 755                 bsd_type = target_netbsd;
 756             } else if (!strcasecmp(argv[optind], "openbsd")) {
 757                 bsd_type = target_openbsd;
 758             } else {
 759                 usage();
 760             }
 761             optind++;
 762         } else if (!strcmp(r, "singlestep")) {
 763             singlestep = 1;
 764         } else if (!strcmp(r, "strace")) {
 765             do_strace = 1;
 766         } else
 767         {
 768             usage();
 769         }
 770     }
 771     if (optind >= argc)
 772         usage();
 773     filename = argv[optind];
 774
 775     /* Zero out regs */
 776     memset(regs, 0, sizeof(struct target_pt_regs));
 777
 778     /* Zero out image_info */
 779     memset(info, 0, sizeof(struct image_info));
 780
 781     /* Scan interp_prefix dir for replacement files. */
 782     init_paths(interp_prefix);
 783
 784     if (cpu_model == NULL) {
 785 #if defined(TARGET_I386)
 786 #ifdef TARGET_X86_64
 787         cpu_model = "qemu64";
 788 #else
 789         cpu_model = "qemu32";
 790 #endif
 791 #elif defined(TARGET_SPARC)
 792 #ifdef TARGET_SPARC64
 793         cpu_model = "TI UltraSparc II";
 794 #else
 795         cpu_model = "Fujitsu MB86904";
 796 #endif
 797 #else
 798         cpu_model = "any";
 799 #endif
 800     }
 801     cpu_exec_init_all(0);
 802     /* NOTE: we need to init the CPU at this stage to get
 803        qemu_host_page_size */
 804     env = cpu_init(cpu_model);
 805     if (!env) {
 806         fprintf(stderr, "Unable to find CPU definition\n");
 807         exit(1);
 808     }
 809     thread_env = env;
 810
 811     if (getenv("QEMU_STRACE")) {
 812         do_strace = 1;
 813     }
 814
 815     target_environ = envlist_to_environ(envlist, NULL);
 816     envlist_free(envlist);
 817
 818
 819     if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) {
 820         printf("Error loading %s\n", filename);
 821         _exit(1);
 822     }
 823
 824     for (wrk = target_environ; *wrk; wrk++) {
 825         free(*wrk);
 826     }
 827
 828     free(target_environ);
 829
 830     if (qemu_log_enabled()) {
 831         log_page_dump();
 832
 833         qemu_log("start_brk   0x" TARGET_ABI_FMT_lx "\n", info->start_brk);
 834         qemu_log("end_code    0x" TARGET_ABI_FMT_lx "\n", info->end_code);
 835         qemu_log("start_code  0x" TARGET_ABI_FMT_lx "\n",
 836                  info->start_code);
 837         qemu_log("start_data  0x" TARGET_ABI_FMT_lx "\n",
 838                  info->start_data);
 839         qemu_log("end_data    0x" TARGET_ABI_FMT_lx "\n", info->end_data);
 840         qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n",
 841                  info->start_stack);
 842         qemu_log("brk         0x" TARGET_ABI_FMT_lx "\n", info->brk);
 843         qemu_log("entry       0x" TARGET_ABI_FMT_lx "\n", info->entry);
 844     }
 845
 846     target_set_brk(info->brk);
 847     syscall_init();
 848     signal_init();
 849
 850     /* build Task State */
 851     memset(ts, 0, sizeof(TaskState));
 852     init_task_state(ts);
 853     ts->info = info;
 854     env->opaque = ts;
 855
 856 #if defined(TARGET_I386)
 857     cpu_x86_set_cpl(env, 3);
 858
 859     env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
 860     env->hflags |= HF_PE_MASK;
 861     if (env->cpuid_features & CPUID_SSE) {
 862         env->cr[4] |= CR4_OSFXSR_MASK;
 863         env->hflags |= HF_OSFXSR_MASK;
 864     }
 865 #ifndef TARGET_ABI32
 866     /* enable 64 bit mode if possible */
 867     if (!(env->cpuid_ext2_features & CPUID_EXT2_LM)) {
 868         fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n");
 869         exit(1);
 870     }
 871     env->cr[4] |= CR4_PAE_MASK;
 872     env->efer |= MSR_EFER_LMA | MSR_EFER_LME;
 873     env->hflags |= HF_LMA_MASK;
 874 #endif
 875
 876     /* flags setup : we activate the IRQs by default as in user mode */
 877     env->eflags |= IF_MASK;
 878
 879     /* linux register setup */
 880 #ifndef TARGET_ABI32
 881     env->regs[R_EAX] = regs->rax;
 882     env->regs[R_EBX] = regs->rbx;
 883     env->regs[R_ECX] = regs->rcx;
 884     env->regs[R_EDX] = regs->rdx;
 885     env->regs[R_ESI] = regs->rsi;
 886     env->regs[R_EDI] = regs->rdi;
 887     env->regs[R_EBP] = regs->rbp;
 888     env->regs[R_ESP] = regs->rsp;
 889     env->eip = regs->rip;
 890 #else
 891     env->regs[R_EAX] = regs->eax;
 892     env->regs[R_EBX] = regs->ebx;
 893     env->regs[R_ECX] = regs->ecx;
 894     env->regs[R_EDX] = regs->edx;
 895     env->regs[R_ESI] = regs->esi;
 896     env->regs[R_EDI] = regs->edi;
 897     env->regs[R_EBP] = regs->ebp;
 898     env->regs[R_ESP] = regs->esp;
 899     env->eip = regs->eip;
 900 #endif
 901
 902     /* linux interrupt setup */
 903 #ifndef TARGET_ABI32
 904     env->idt.limit = 511;
 905 #else
 906     env->idt.limit = 255;
 907 #endif
 908     env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1),
 909                                 PROT_READ|PROT_WRITE,
 910                                 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
 911     idt_table = g2h(env->idt.base);
 912     set_idt(0, 0);
 913     set_idt(1, 0);
 914     set_idt(2, 0);
 915     set_idt(3, 3);
 916     set_idt(4, 3);
 917     set_idt(5, 0);
 918     set_idt(6, 0);
 919     set_idt(7, 0);
 920     set_idt(8, 0);
 921     set_idt(9, 0);
 922     set_idt(10, 0);
 923     set_idt(11, 0);
 924     set_idt(12, 0);
 925     set_idt(13, 0);
 926     set_idt(14, 0);
 927     set_idt(15, 0);
 928     set_idt(16, 0);
 929     set_idt(17, 0);
 930     set_idt(18, 0);
 931     set_idt(19, 0);
 932     set_idt(0x80, 3);
 933
 934     /* linux segment setup */
 935     {
 936         uint64_t *gdt_table;
 937         env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES,
 938                                     PROT_READ|PROT_WRITE,
 939                                     MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
 940         env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1;
 941         gdt_table = g2h(env->gdt.base);
 942 #ifdef TARGET_ABI32
 943         write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
 944                  DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
 945                  (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
 946 #else
 947         /* 64 bit code segment */
 948         write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
 949                  DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
 950                  DESC_L_MASK |
 951                  (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
 952 #endif
 953         write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff,
 954                  DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
 955                  (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
 956     }
 957
 958     cpu_x86_load_seg(env, R_CS, __USER_CS);
 959     cpu_x86_load_seg(env, R_SS, __USER_DS);
 960 #ifdef TARGET_ABI32
 961     cpu_x86_load_seg(env, R_DS, __USER_DS);
 962     cpu_x86_load_seg(env, R_ES, __USER_DS);
 963     cpu_x86_load_seg(env, R_FS, __USER_DS);
 964     cpu_x86_load_seg(env, R_GS, __USER_DS);
 965     /* This hack makes Wine work... */
 966     env->segs[R_FS].selector = 0;
 967 #else
 968     cpu_x86_load_seg(env, R_DS, 0);
 969     cpu_x86_load_seg(env, R_ES, 0);
 970     cpu_x86_load_seg(env, R_FS, 0);
 971     cpu_x86_load_seg(env, R_GS, 0);
 972 #endif
 973 #elif defined(TARGET_SPARC)
 974     {
 975         int i;
 976         env->pc = regs->pc;
 977         env->npc = regs->npc;
 978         env->y = regs->y;
 979         for(i = 0; i < 8; i++)
 980             env->gregs[i] = regs->u_regs[i];
 981         for(i = 0; i < 8; i++)
 982             env->regwptr[i] = regs->u_regs[i + 8];
 983     }
 984 #else
 985 #error unsupported target CPU
 986 #endif
 987
 988     if (gdbstub_port) {
 989         gdbserver_start (gdbstub_port);
 990         gdb_handlesig(env, 0);
 991     }
 992     cpu_loop(env, bsd_type);
 993     /* never exits */
 994     return 0;
 995 }