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 #include "exec/log.h"
  37
  38 int singlestep;
  39 unsigned long mmap_min_addr;
  40 unsigned long guest_base;
  41 int have_guest_base;
  42 unsigned long reserved_va;
  43
  44 static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX;
  45 const char *qemu_uname_release;
  46 extern char **environ;
  47 enum BSDType bsd_type;
  48
  49 /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
  50    we allocate a bigger stack. Need a better solution, for example
  51    by remapping the process stack directly at the right place */
  52 unsigned long x86_stack_size = 512 * 1024;
  53
  54 void gemu_log(const char *fmt, ...)
  55 {
  56     va_list ap;
  57
  58     va_start(ap, fmt);
  59     vfprintf(stderr, fmt, ap);
  60     va_end(ap);
  61 }
  62
  63 #if defined(TARGET_I386)
  64 int cpu_get_pic_interrupt(CPUX86State *env)
  65 {
  66     return -1;
  67 }
  68 #endif
  69
  70 /* These are no-ops because we are not threadsafe.  */
  71 static inline void cpu_exec_start(CPUArchState *env)
  72 {
  73 }
  74
  75 static inline void cpu_exec_end(CPUArchState *env)
  76 {
  77 }
  78
  79 static inline void start_exclusive(void)
  80 {
  81 }
  82
  83 static inline void end_exclusive(void)
  84 {
  85 }
  86
  87 void fork_start(void)
  88 {
  89 }
  90
  91 void fork_end(int child)
  92 {
  93     if (child) {
  94         gdbserver_fork(thread_cpu);
  95     }
  96 }
  97
  98 void cpu_list_lock(void)
  99 {
 100 }
 101
 102 void cpu_list_unlock(void)
 103 {
 104 }
 105
 106 #ifdef TARGET_I386
 107 /***********************************************************/
 108 /* CPUX86 core interface */
 109
 110 uint64_t cpu_get_tsc(CPUX86State *env)
 111 {
 112     return cpu_get_host_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)
 167 {
 168     X86CPU *cpu = x86_env_get_cpu(env);
 169     CPUState *cs = CPU(cpu);
 170     int trapnr;
 171     abi_ulong pc;
 172     //target_siginfo_t info;
 173
 174     for(;;) {
 175         trapnr = cpu_x86_exec(cs);
 176         switch(trapnr) {
 177         case 0x80:
 178             /* syscall from int $0x80 */
 179             if (bsd_type == target_freebsd) {
 180                 abi_ulong params = (abi_ulong) env->regs[R_ESP] +
 181                     sizeof(int32_t);
 182                 int32_t syscall_nr = env->regs[R_EAX];
 183                 int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8;
 184
 185                 if (syscall_nr == TARGET_FREEBSD_NR_syscall) {
 186                     get_user_s32(syscall_nr, params);
 187                     params += sizeof(int32_t);
 188                 } else if (syscall_nr == TARGET_FREEBSD_NR___syscall) {
 189                     get_user_s32(syscall_nr, params);
 190                     params += sizeof(int64_t);
 191                 }
 192                 get_user_s32(arg1, params);
 193                 params += sizeof(int32_t);
 194                 get_user_s32(arg2, params);
 195                 params += sizeof(int32_t);
 196                 get_user_s32(arg3, params);
 197                 params += sizeof(int32_t);
 198                 get_user_s32(arg4, params);
 199                 params += sizeof(int32_t);
 200                 get_user_s32(arg5, params);
 201                 params += sizeof(int32_t);
 202                 get_user_s32(arg6, params);
 203                 params += sizeof(int32_t);
 204                 get_user_s32(arg7, params);
 205                 params += sizeof(int32_t);
 206                 get_user_s32(arg8, params);
 207                 env->regs[R_EAX] = do_freebsd_syscall(env,
 208                                                       syscall_nr,
 209                                                       arg1,
 210                                                       arg2,
 211                                                       arg3,
 212                                                       arg4,
 213                                                       arg5,
 214                                                       arg6,
 215                                                       arg7,
 216                                                       arg8);
 217             } else { //if (bsd_type == target_openbsd)
 218                 env->regs[R_EAX] = do_openbsd_syscall(env,
 219                                                       env->regs[R_EAX],
 220                                                       env->regs[R_EBX],
 221                                                       env->regs[R_ECX],
 222                                                       env->regs[R_EDX],
 223                                                       env->regs[R_ESI],
 224                                                       env->regs[R_EDI],
 225                                                       env->regs[R_EBP]);
 226             }
 227             if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) {
 228                 env->regs[R_EAX] = -env->regs[R_EAX];
 229                 env->eflags |= CC_C;
 230             } else {
 231                 env->eflags &= ~CC_C;
 232             }
 233             break;
 234 #ifndef TARGET_ABI32
 235         case EXCP_SYSCALL:
 236             /* syscall from syscall instruction */
 237             if (bsd_type == target_freebsd)
 238                 env->regs[R_EAX] = do_freebsd_syscall(env,
 239                                                       env->regs[R_EAX],
 240                                                       env->regs[R_EDI],
 241                                                       env->regs[R_ESI],
 242                                                       env->regs[R_EDX],
 243                                                       env->regs[R_ECX],
 244                                                       env->regs[8],
 245                                                       env->regs[9], 0, 0);
 246             else { //if (bsd_type == target_openbsd)
 247                 env->regs[R_EAX] = do_openbsd_syscall(env,
 248                                                       env->regs[R_EAX],
 249                                                       env->regs[R_EDI],
 250                                                       env->regs[R_ESI],
 251                                                       env->regs[R_EDX],
 252                                                       env->regs[10],
 253                                                       env->regs[8],
 254                                                       env->regs[9]);
 255             }
 256             env->eip = env->exception_next_eip;
 257             if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) {
 258                 env->regs[R_EAX] = -env->regs[R_EAX];
 259                 env->eflags |= CC_C;
 260             } else {
 261                 env->eflags &= ~CC_C;
 262             }
 263             break;
 264 #endif
 265 #if 0
 266         case EXCP0B_NOSEG:
 267         case EXCP0C_STACK:
 268             info.si_signo = SIGBUS;
 269             info.si_errno = 0;
 270             info.si_code = TARGET_SI_KERNEL;
 271             info._sifields._sigfault._addr = 0;
 272             queue_signal(env, info.si_signo, &info);
 273             break;
 274         case EXCP0D_GPF:
 275             /* XXX: potential problem if ABI32 */
 276 #ifndef TARGET_X86_64
 277             if (env->eflags & VM_MASK) {
 278                 handle_vm86_fault(env);
 279             } else
 280 #endif
 281             {
 282                 info.si_signo = SIGSEGV;
 283                 info.si_errno = 0;
 284                 info.si_code = TARGET_SI_KERNEL;
 285                 info._sifields._sigfault._addr = 0;
 286                 queue_signal(env, info.si_signo, &info);
 287             }
 288             break;
 289         case EXCP0E_PAGE:
 290             info.si_signo = SIGSEGV;
 291             info.si_errno = 0;
 292             if (!(env->error_code & 1))
 293                 info.si_code = TARGET_SEGV_MAPERR;
 294             else
 295                 info.si_code = TARGET_SEGV_ACCERR;
 296             info._sifields._sigfault._addr = env->cr[2];
 297             queue_signal(env, info.si_signo, &info);
 298             break;
 299         case EXCP00_DIVZ:
 300 #ifndef TARGET_X86_64
 301             if (env->eflags & VM_MASK) {
 302                 handle_vm86_trap(env, trapnr);
 303             } else
 304 #endif
 305             {
 306                 /* division by zero */
 307                 info.si_signo = SIGFPE;
 308                 info.si_errno = 0;
 309                 info.si_code = TARGET_FPE_INTDIV;
 310                 info._sifields._sigfault._addr = env->eip;
 311                 queue_signal(env, info.si_signo, &info);
 312             }
 313             break;
 314         case EXCP01_DB:
 315         case EXCP03_INT3:
 316 #ifndef TARGET_X86_64
 317             if (env->eflags & VM_MASK) {
 318                 handle_vm86_trap(env, trapnr);
 319             } else
 320 #endif
 321             {
 322                 info.si_signo = SIGTRAP;
 323                 info.si_errno = 0;
 324                 if (trapnr == EXCP01_DB) {
 325                     info.si_code = TARGET_TRAP_BRKPT;
 326                     info._sifields._sigfault._addr = env->eip;
 327                 } else {
 328                     info.si_code = TARGET_SI_KERNEL;
 329                     info._sifields._sigfault._addr = 0;
 330                 }
 331                 queue_signal(env, info.si_signo, &info);
 332             }
 333             break;
 334         case EXCP04_INTO:
 335         case EXCP05_BOUND:
 336 #ifndef TARGET_X86_64
 337             if (env->eflags & VM_MASK) {
 338                 handle_vm86_trap(env, trapnr);
 339             } else
 340 #endif
 341             {
 342                 info.si_signo = SIGSEGV;
 343                 info.si_errno = 0;
 344                 info.si_code = TARGET_SI_KERNEL;
 345                 info._sifields._sigfault._addr = 0;
 346                 queue_signal(env, info.si_signo, &info);
 347             }
 348             break;
 349         case EXCP06_ILLOP:
 350             info.si_signo = SIGILL;
 351             info.si_errno = 0;
 352             info.si_code = TARGET_ILL_ILLOPN;
 353             info._sifields._sigfault._addr = env->eip;
 354             queue_signal(env, info.si_signo, &info);
 355             break;
 356 #endif
 357         case EXCP_INTERRUPT:
 358             /* just indicate that signals should be handled asap */
 359             break;
 360 #if 0
 361         case EXCP_DEBUG:
 362             {
 363                 int sig;
 364
 365                 sig = gdb_handlesig (env, TARGET_SIGTRAP);
 366                 if (sig)
 367                   {
 368                     info.si_signo = sig;
 369                     info.si_errno = 0;
 370                     info.si_code = TARGET_TRAP_BRKPT;
 371                     queue_signal(env, info.si_signo, &info);
 372                   }
 373             }
 374             break;
 375 #endif
 376         default:
 377             pc = env->segs[R_CS].base + env->eip;
 378             fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
 379                     (long)pc, trapnr);
 380             abort();
 381         }
 382         process_pending_signals(env);
 383     }
 384 }
 385 #endif
 386
 387 #ifdef TARGET_SPARC
 388 #define SPARC64_STACK_BIAS 2047
 389
 390 //#define DEBUG_WIN
 391 /* WARNING: dealing with register windows _is_ complicated. More info
 392    can be found at http://www.sics.se/~psm/sparcstack.html */
 393 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index)
 394 {
 395     index = (index + cwp * 16) % (16 * env->nwindows);
 396     /* wrap handling : if cwp is on the last window, then we use the
 397        registers 'after' the end */
 398     if (index < 8 && env->cwp == env->nwindows - 1)
 399         index += 16 * env->nwindows;
 400     return index;
 401 }
 402
 403 /* save the register window 'cwp1' */
 404 static inline void save_window_offset(CPUSPARCState *env, int cwp1)
 405 {
 406     unsigned int i;
 407     abi_ulong sp_ptr;
 408
 409     sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
 410 #ifdef TARGET_SPARC64
 411     if (sp_ptr & 3)
 412         sp_ptr += SPARC64_STACK_BIAS;
 413 #endif
 414 #if defined(DEBUG_WIN)
 415     printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n",
 416            sp_ptr, cwp1);
 417 #endif
 418     for(i = 0; i < 16; i++) {
 419         /* FIXME - what to do if put_user() fails? */
 420         put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
 421         sp_ptr += sizeof(abi_ulong);
 422     }
 423 }
 424
 425 static void save_window(CPUSPARCState *env)
 426 {
 427 #ifndef TARGET_SPARC64
 428     unsigned int new_wim;
 429     new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) &
 430         ((1LL << env->nwindows) - 1);
 431     save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
 432     env->wim = new_wim;
 433 #else
 434     save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
 435     env->cansave++;
 436     env->canrestore--;
 437 #endif
 438 }
 439
 440 static void restore_window(CPUSPARCState *env)
 441 {
 442 #ifndef TARGET_SPARC64
 443     unsigned int new_wim;
 444 #endif
 445     unsigned int i, cwp1;
 446     abi_ulong sp_ptr;
 447
 448 #ifndef TARGET_SPARC64
 449     new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) &
 450         ((1LL << env->nwindows) - 1);
 451 #endif
 452
 453     /* restore the invalid window */
 454     cwp1 = cpu_cwp_inc(env, env->cwp + 1);
 455     sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
 456 #ifdef TARGET_SPARC64
 457     if (sp_ptr & 3)
 458         sp_ptr += SPARC64_STACK_BIAS;
 459 #endif
 460 #if defined(DEBUG_WIN)
 461     printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n",
 462            sp_ptr, cwp1);
 463 #endif
 464     for(i = 0; i < 16; i++) {
 465         /* FIXME - what to do if get_user() fails? */
 466         get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
 467         sp_ptr += sizeof(abi_ulong);
 468     }
 469 #ifdef TARGET_SPARC64
 470     env->canrestore++;
 471     if (env->cleanwin < env->nwindows - 1)
 472         env->cleanwin++;
 473     env->cansave--;
 474 #else
 475     env->wim = new_wim;
 476 #endif
 477 }
 478
 479 static void flush_windows(CPUSPARCState *env)
 480 {
 481     int offset, cwp1;
 482
 483     offset = 1;
 484     for(;;) {
 485         /* if restore would invoke restore_window(), then we can stop */
 486         cwp1 = cpu_cwp_inc(env, env->cwp + offset);
 487 #ifndef TARGET_SPARC64
 488         if (env->wim & (1 << cwp1))
 489             break;
 490 #else
 491         if (env->canrestore == 0)
 492             break;
 493         env->cansave++;
 494         env->canrestore--;
 495 #endif
 496         save_window_offset(env, cwp1);
 497         offset++;
 498     }
 499     cwp1 = cpu_cwp_inc(env, env->cwp + 1);
 500 #ifndef TARGET_SPARC64
 501     /* set wim so that restore will reload the registers */
 502     env->wim = 1 << cwp1;
 503 #endif
 504 #if defined(DEBUG_WIN)
 505     printf("flush_windows: nb=%d\n", offset - 1);
 506 #endif
 507 }
 508
 509 void cpu_loop(CPUSPARCState *env)
 510 {
 511     CPUState *cs = CPU(sparc_env_get_cpu(env));
 512     int trapnr, ret, syscall_nr;
 513     //target_siginfo_t info;
 514
 515     while (1) {
 516         trapnr = cpu_sparc_exec(cs);
 517
 518         switch (trapnr) {
 519 #ifndef TARGET_SPARC64
 520         case 0x80:
 521 #else
 522         /* FreeBSD uses 0x141 for syscalls too */
 523         case 0x141:
 524             if (bsd_type != target_freebsd)
 525                 goto badtrap;
 526         case 0x100:
 527 #endif
 528             syscall_nr = env->gregs[1];
 529             if (bsd_type == target_freebsd)
 530                 ret = do_freebsd_syscall(env, syscall_nr,
 531                                          env->regwptr[0], env->regwptr[1],
 532                                          env->regwptr[2], env->regwptr[3],
 533                                          env->regwptr[4], env->regwptr[5], 0, 0);
 534             else if (bsd_type == target_netbsd)
 535                 ret = do_netbsd_syscall(env, syscall_nr,
 536                                         env->regwptr[0], env->regwptr[1],
 537                                         env->regwptr[2], env->regwptr[3],
 538                                         env->regwptr[4], env->regwptr[5]);
 539             else { //if (bsd_type == target_openbsd)
 540 #if defined(TARGET_SPARC64)
 541                 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG |
 542                                 TARGET_OPENBSD_SYSCALL_G2RFLAG);
 543 #endif
 544                 ret = do_openbsd_syscall(env, syscall_nr,
 545                                          env->regwptr[0], env->regwptr[1],
 546                                          env->regwptr[2], env->regwptr[3],
 547                                          env->regwptr[4], env->regwptr[5]);
 548             }
 549             if ((unsigned int)ret >= (unsigned int)(-515)) {
 550                 ret = -ret;
 551 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
 552                 env->xcc |= PSR_CARRY;
 553 #else
 554                 env->psr |= PSR_CARRY;
 555 #endif
 556             } else {
 557 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
 558                 env->xcc &= ~PSR_CARRY;
 559 #else
 560                 env->psr &= ~PSR_CARRY;
 561 #endif
 562             }
 563             env->regwptr[0] = ret;
 564             /* next instruction */
 565 #if defined(TARGET_SPARC64)
 566             if (bsd_type == target_openbsd &&
 567                 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) {
 568                 env->pc = env->gregs[2];
 569                 env->npc = env->pc + 4;
 570             } else if (bsd_type == target_openbsd &&
 571                        env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) {
 572                 env->pc = env->gregs[7];
 573                 env->npc = env->pc + 4;
 574             } else {
 575                 env->pc = env->npc;
 576                 env->npc = env->npc + 4;
 577             }
 578 #else
 579             env->pc = env->npc;
 580             env->npc = env->npc + 4;
 581 #endif
 582             break;
 583         case 0x83: /* flush windows */
 584 #ifdef TARGET_ABI32
 585         case 0x103:
 586 #endif
 587             flush_windows(env);
 588             /* next instruction */
 589             env->pc = env->npc;
 590             env->npc = env->npc + 4;
 591             break;
 592 #ifndef TARGET_SPARC64
 593         case TT_WIN_OVF: /* window overflow */
 594             save_window(env);
 595             break;
 596         case TT_WIN_UNF: /* window underflow */
 597             restore_window(env);
 598             break;
 599         case TT_TFAULT:
 600         case TT_DFAULT:
 601 #if 0
 602             {
 603                 info.si_signo = SIGSEGV;
 604                 info.si_errno = 0;
 605                 /* XXX: check env->error_code */
 606                 info.si_code = TARGET_SEGV_MAPERR;
 607                 info._sifields._sigfault._addr = env->mmuregs[4];
 608                 queue_signal(env, info.si_signo, &info);
 609             }
 610 #endif
 611             break;
 612 #else
 613         case TT_SPILL: /* window overflow */
 614             save_window(env);
 615             break;
 616         case TT_FILL: /* window underflow */
 617             restore_window(env);
 618             break;
 619         case TT_TFAULT:
 620         case TT_DFAULT:
 621 #if 0
 622             {
 623                 info.si_signo = SIGSEGV;
 624                 info.si_errno = 0;
 625                 /* XXX: check env->error_code */
 626                 info.si_code = TARGET_SEGV_MAPERR;
 627                 if (trapnr == TT_DFAULT)
 628                     info._sifields._sigfault._addr = env->dmmuregs[4];
 629                 else
 630                     info._sifields._sigfault._addr = env->tsptr->tpc;
 631                 //queue_signal(env, info.si_signo, &info);
 632             }
 633 #endif
 634             break;
 635 #endif
 636         case EXCP_INTERRUPT:
 637             /* just indicate that signals should be handled asap */
 638             break;
 639         case EXCP_DEBUG:
 640             {
 641                 int sig;
 642
 643                 sig = gdb_handlesig(cs, TARGET_SIGTRAP);
 644 #if 0
 645                 if (sig)
 646                   {
 647                     info.si_signo = sig;
 648                     info.si_errno = 0;
 649                     info.si_code = TARGET_TRAP_BRKPT;
 650                     //queue_signal(env, info.si_signo, &info);
 651                   }
 652 #endif
 653             }
 654             break;
 655         default:
 656 #ifdef TARGET_SPARC64
 657         badtrap:
 658 #endif
 659             printf ("Unhandled trap: 0x%x\n", trapnr);
 660             cpu_dump_state(cs, stderr, fprintf, 0);
 661             exit (1);
 662         }
 663         process_pending_signals (env);
 664     }
 665 }
 666
 667 #endif
 668
 669 static void usage(void)
 670 {
 671     printf("qemu-" TARGET_NAME " version " QEMU_VERSION ", Copyright (c) 2003-2008 Fabrice Bellard\n"
 672            "usage: qemu-" TARGET_NAME " [options] program [arguments...]\n"
 673            "BSD CPU emulator (compiled for %s emulation)\n"
 674            "\n"
 675            "Standard options:\n"
 676            "-h                print this help\n"
 677            "-g port           wait gdb connection to port\n"
 678            "-L path           set the elf interpreter prefix (default=%s)\n"
 679            "-s size           set the stack size in bytes (default=%ld)\n"
 680            "-cpu model        select CPU (-cpu help for list)\n"
 681            "-drop-ld-preload  drop LD_PRELOAD for target process\n"
 682            "-E var=value      sets/modifies targets environment variable(s)\n"
 683            "-U var            unsets targets environment variable(s)\n"
 684            "-B address        set guest_base address to address\n"
 685            "-bsd type         select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n"
 686            "\n"
 687            "Debug options:\n"
 688            "-d item1[,...]    enable logging of specified items\n"
 689            "                  (use '-d help' for a list of log items)\n"
 690            "-D logfile        write logs to 'logfile' (default stderr)\n"
 691            "-p pagesize       set the host page size to 'pagesize'\n"
 692            "-singlestep       always run in singlestep mode\n"
 693            "-strace           log system calls\n"
 694            "\n"
 695            "Environment variables:\n"
 696            "QEMU_STRACE       Print system calls and arguments similar to the\n"
 697            "                  'strace' program.  Enable by setting to any value.\n"
 698            "You can use -E and -U options to set/unset environment variables\n"
 699            "for target process.  It is possible to provide several variables\n"
 700            "by repeating the option.  For example:\n"
 701            "    -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n"
 702            "Note that if you provide several changes to single variable\n"
 703            "last change will stay in effect.\n"
 704            ,
 705            TARGET_NAME,
 706            interp_prefix,
 707            x86_stack_size);
 708     exit(1);
 709 }
 710
 711 THREAD CPUState *thread_cpu;
 712
 713 /* Assumes contents are already zeroed.  */
 714 void init_task_state(TaskState *ts)
 715 {
 716     int i;
 717
 718     ts->used = 1;
 719     ts->first_free = ts->sigqueue_table;
 720     for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) {
 721         ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1];
 722     }
 723     ts->sigqueue_table[i].next = NULL;
 724 }
 725
 726 int main(int argc, char **argv)
 727 {
 728     const char *filename;
 729     const char *cpu_model;
 730     const char *log_file = NULL;
 731     const char *log_mask = NULL;
 732     struct target_pt_regs regs1, *regs = &regs1;
 733     struct image_info info1, *info = &info1;
 734     TaskState ts1, *ts = &ts1;
 735     CPUArchState *env;
 736     CPUState *cpu;
 737     int optind;
 738     const char *r;
 739     int gdbstub_port = 0;
 740     char **target_environ, **wrk;
 741     envlist_t *envlist = NULL;
 742     bsd_type = target_openbsd;
 743
 744     if (argc <= 1)
 745         usage();
 746
 747     module_call_init(MODULE_INIT_QOM);
 748
 749     if ((envlist = envlist_create()) == NULL) {
 750         (void) fprintf(stderr, "Unable to allocate envlist\n");
 751         exit(1);
 752     }
 753
 754     /* add current environment into the list */
 755     for (wrk = environ; *wrk != NULL; wrk++) {
 756         (void) envlist_setenv(envlist, *wrk);
 757     }
 758
 759     cpu_model = NULL;
 760 #if defined(cpudef_setup)
 761     cpudef_setup(); /* parse cpu definitions in target config file (TBD) */
 762 #endif
 763
 764     optind = 1;
 765     for(;;) {
 766         if (optind >= argc)
 767             break;
 768         r = argv[optind];
 769         if (r[0] != '-')
 770             break;
 771         optind++;
 772         r++;
 773         if (!strcmp(r, "-")) {
 774             break;
 775         } else if (!strcmp(r, "d")) {
 776             if (optind >= argc) {
 777                 break;
 778             }
 779             log_mask = argv[optind++];
 780         } else if (!strcmp(r, "D")) {
 781             if (optind >= argc) {
 782                 break;
 783             }
 784             log_file = argv[optind++];
 785         } else if (!strcmp(r, "E")) {
 786             r = argv[optind++];
 787             if (envlist_setenv(envlist, r) != 0)
 788                 usage();
 789         } else if (!strcmp(r, "ignore-environment")) {
 790             envlist_free(envlist);
 791             if ((envlist = envlist_create()) == NULL) {
 792                 (void) fprintf(stderr, "Unable to allocate envlist\n");
 793                 exit(1);
 794             }
 795         } else if (!strcmp(r, "U")) {
 796             r = argv[optind++];
 797             if (envlist_unsetenv(envlist, r) != 0)
 798                 usage();
 799         } else if (!strcmp(r, "s")) {
 800             r = argv[optind++];
 801             x86_stack_size = strtol(r, (char **)&r, 0);
 802             if (x86_stack_size <= 0)
 803                 usage();
 804             if (*r == 'M')
 805                 x86_stack_size *= 1024 * 1024;
 806             else if (*r == 'k' || *r == 'K')
 807                 x86_stack_size *= 1024;
 808         } else if (!strcmp(r, "L")) {
 809             interp_prefix = argv[optind++];
 810         } else if (!strcmp(r, "p")) {
 811             qemu_host_page_size = atoi(argv[optind++]);
 812             if (qemu_host_page_size == 0 ||
 813                 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
 814                 fprintf(stderr, "page size must be a power of two\n");
 815                 exit(1);
 816             }
 817         } else if (!strcmp(r, "g")) {
 818             gdbstub_port = atoi(argv[optind++]);
 819         } else if (!strcmp(r, "r")) {
 820             qemu_uname_release = argv[optind++];
 821         } else if (!strcmp(r, "cpu")) {
 822             cpu_model = argv[optind++];
 823             if (is_help_option(cpu_model)) {
 824 /* XXX: implement xxx_cpu_list for targets that still miss it */
 825 #if defined(cpu_list)
 826                     cpu_list(stdout, &fprintf);
 827 #endif
 828                 exit(1);
 829             }
 830         } else if (!strcmp(r, "B")) {
 831            guest_base = strtol(argv[optind++], NULL, 0);
 832            have_guest_base = 1;
 833         } else if (!strcmp(r, "drop-ld-preload")) {
 834             (void) envlist_unsetenv(envlist, "LD_PRELOAD");
 835         } else if (!strcmp(r, "bsd")) {
 836             if (!strcasecmp(argv[optind], "freebsd")) {
 837                 bsd_type = target_freebsd;
 838             } else if (!strcasecmp(argv[optind], "netbsd")) {
 839                 bsd_type = target_netbsd;
 840             } else if (!strcasecmp(argv[optind], "openbsd")) {
 841                 bsd_type = target_openbsd;
 842             } else {
 843                 usage();
 844             }
 845             optind++;
 846         } else if (!strcmp(r, "singlestep")) {
 847             singlestep = 1;
 848         } else if (!strcmp(r, "strace")) {
 849             do_strace = 1;
 850         } else
 851         {
 852             usage();
 853         }
 854     }
 855
 856     /* init debug */
 857     qemu_set_log_filename(log_file);
 858     if (log_mask) {
 859         int mask;
 860
 861         mask = qemu_str_to_log_mask(log_mask);
 862         if (!mask) {
 863             qemu_print_log_usage(stdout);
 864             exit(1);
 865         }
 866         qemu_set_log(mask);
 867     }
 868
 869     if (optind >= argc) {
 870         usage();
 871     }
 872     filename = argv[optind];
 873
 874     /* Zero out regs */
 875     memset(regs, 0, sizeof(struct target_pt_regs));
 876
 877     /* Zero out image_info */
 878     memset(info, 0, sizeof(struct image_info));
 879
 880     /* Scan interp_prefix dir for replacement files. */
 881     init_paths(interp_prefix);
 882
 883     if (cpu_model == NULL) {
 884 #if defined(TARGET_I386)
 885 #ifdef TARGET_X86_64
 886         cpu_model = "qemu64";
 887 #else
 888         cpu_model = "qemu32";
 889 #endif
 890 #elif defined(TARGET_SPARC)
 891 #ifdef TARGET_SPARC64
 892         cpu_model = "TI UltraSparc II";
 893 #else
 894         cpu_model = "Fujitsu MB86904";
 895 #endif
 896 #else
 897         cpu_model = "any";
 898 #endif
 899     }
 900     tcg_exec_init(0);
 901     /* NOTE: we need to init the CPU at this stage to get
 902        qemu_host_page_size */
 903     cpu = cpu_init(cpu_model);
 904     if (!cpu) {
 905         fprintf(stderr, "Unable to find CPU definition\n");
 906         exit(1);
 907     }
 908     env = cpu->env_ptr;
 909 #if defined(TARGET_SPARC) || defined(TARGET_PPC)
 910     cpu_reset(cpu);
 911 #endif
 912     thread_cpu = cpu;
 913
 914     if (getenv("QEMU_STRACE")) {
 915         do_strace = 1;
 916     }
 917
 918     target_environ = envlist_to_environ(envlist, NULL);
 919     envlist_free(envlist);
 920
 921     /*
 922      * Now that page sizes are configured in cpu_init() we can do
 923      * proper page alignment for guest_base.
 924      */
 925     guest_base = HOST_PAGE_ALIGN(guest_base);
 926
 927     /*
 928      * Read in mmap_min_addr kernel parameter.  This value is used
 929      * When loading the ELF image to determine whether guest_base
 930      * is needed.
 931      *
 932      * When user has explicitly set the quest base, we skip this
 933      * test.
 934      */
 935     if (!have_guest_base) {
 936         FILE *fp;
 937
 938         if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) {
 939             unsigned long tmp;
 940             if (fscanf(fp, "%lu", &tmp) == 1) {
 941                 mmap_min_addr = tmp;
 942                 qemu_log_mask(CPU_LOG_PAGE, "host mmap_min_addr=0x%lx\n", mmap_min_addr);
 943             }
 944             fclose(fp);
 945         }
 946     }
 947
 948     if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) {
 949         printf("Error loading %s\n", filename);
 950         _exit(1);
 951     }
 952
 953     for (wrk = target_environ; *wrk; wrk++) {
 954         free(*wrk);
 955     }
 956
 957     free(target_environ);
 958
 959     if (qemu_loglevel_mask(CPU_LOG_PAGE)) {
 960         qemu_log("guest_base  0x%lx\n", guest_base);
 961         log_page_dump();
 962
 963         qemu_log("start_brk   0x" TARGET_ABI_FMT_lx "\n", info->start_brk);
 964         qemu_log("end_code    0x" TARGET_ABI_FMT_lx "\n", info->end_code);
 965         qemu_log("start_code  0x" TARGET_ABI_FMT_lx "\n",
 966                  info->start_code);
 967         qemu_log("start_data  0x" TARGET_ABI_FMT_lx "\n",
 968                  info->start_data);
 969         qemu_log("end_data    0x" TARGET_ABI_FMT_lx "\n", info->end_data);
 970         qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n",
 971                  info->start_stack);
 972         qemu_log("brk         0x" TARGET_ABI_FMT_lx "\n", info->brk);
 973         qemu_log("entry       0x" TARGET_ABI_FMT_lx "\n", info->entry);
 974     }
 975
 976     target_set_brk(info->brk);
 977     syscall_init();
 978     signal_init();
 979
 980     /* Now that we've loaded the binary, GUEST_BASE is fixed.  Delay
 981        generating the prologue until now so that the prologue can take
 982        the real value of GUEST_BASE into account.  */
 983     tcg_prologue_init(&tcg_ctx);
 984
 985     /* build Task State */
 986     memset(ts, 0, sizeof(TaskState));
 987     init_task_state(ts);
 988     ts->info = info;
 989     cpu->opaque = ts;
 990
 991 #if defined(TARGET_I386)
 992     env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
 993     env->hflags |= HF_PE_MASK | HF_CPL_MASK;
 994     if (env->features[FEAT_1_EDX] & CPUID_SSE) {
 995         env->cr[4] |= CR4_OSFXSR_MASK;
 996         env->hflags |= HF_OSFXSR_MASK;
 997     }
 998 #ifndef TARGET_ABI32
 999     /* enable 64 bit mode if possible */
1000     if (!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM)) {
1001         fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n");
1002         exit(1);
1003     }
1004     env->cr[4] |= CR4_PAE_MASK;
1005     env->efer |= MSR_EFER_LMA | MSR_EFER_LME;
1006     env->hflags |= HF_LMA_MASK;
1007 #endif
1008
1009     /* flags setup : we activate the IRQs by default as in user mode */
1010     env->eflags |= IF_MASK;
1011
1012     /* linux register setup */
1013 #ifndef TARGET_ABI32
1014     env->regs[R_EAX] = regs->rax;
1015     env->regs[R_EBX] = regs->rbx;
1016     env->regs[R_ECX] = regs->rcx;
1017     env->regs[R_EDX] = regs->rdx;
1018     env->regs[R_ESI] = regs->rsi;
1019     env->regs[R_EDI] = regs->rdi;
1020     env->regs[R_EBP] = regs->rbp;
1021     env->regs[R_ESP] = regs->rsp;
1022     env->eip = regs->rip;
1023 #else
1024     env->regs[R_EAX] = regs->eax;
1025     env->regs[R_EBX] = regs->ebx;
1026     env->regs[R_ECX] = regs->ecx;
1027     env->regs[R_EDX] = regs->edx;
1028     env->regs[R_ESI] = regs->esi;
1029     env->regs[R_EDI] = regs->edi;
1030     env->regs[R_EBP] = regs->ebp;
1031     env->regs[R_ESP] = regs->esp;
1032     env->eip = regs->eip;
1033 #endif
1034
1035     /* linux interrupt setup */
1036 #ifndef TARGET_ABI32
1037     env->idt.limit = 511;
1038 #else
1039     env->idt.limit = 255;
1040 #endif
1041     env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1),
1042                                 PROT_READ|PROT_WRITE,
1043                                 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1044     idt_table = g2h(env->idt.base);
1045     set_idt(0, 0);
1046     set_idt(1, 0);
1047     set_idt(2, 0);
1048     set_idt(3, 3);
1049     set_idt(4, 3);
1050     set_idt(5, 0);
1051     set_idt(6, 0);
1052     set_idt(7, 0);
1053     set_idt(8, 0);
1054     set_idt(9, 0);
1055     set_idt(10, 0);
1056     set_idt(11, 0);
1057     set_idt(12, 0);
1058     set_idt(13, 0);
1059     set_idt(14, 0);
1060     set_idt(15, 0);
1061     set_idt(16, 0);
1062     set_idt(17, 0);
1063     set_idt(18, 0);
1064     set_idt(19, 0);
1065     set_idt(0x80, 3);
1066
1067     /* linux segment setup */
1068     {
1069         uint64_t *gdt_table;
1070         env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES,
1071                                     PROT_READ|PROT_WRITE,
1072                                     MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1073         env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1;
1074         gdt_table = g2h(env->gdt.base);
1075 #ifdef TARGET_ABI32
1076         write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1077                  DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1078                  (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1079 #else
1080         /* 64 bit code segment */
1081         write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1082                  DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1083                  DESC_L_MASK |
1084                  (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1085 #endif
1086         write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff,
1087                  DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1088                  (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
1089     }
1090
1091     cpu_x86_load_seg(env, R_CS, __USER_CS);
1092     cpu_x86_load_seg(env, R_SS, __USER_DS);
1093 #ifdef TARGET_ABI32
1094     cpu_x86_load_seg(env, R_DS, __USER_DS);
1095     cpu_x86_load_seg(env, R_ES, __USER_DS);
1096     cpu_x86_load_seg(env, R_FS, __USER_DS);
1097     cpu_x86_load_seg(env, R_GS, __USER_DS);
1098     /* This hack makes Wine work... */
1099     env->segs[R_FS].selector = 0;
1100 #else
1101     cpu_x86_load_seg(env, R_DS, 0);
1102     cpu_x86_load_seg(env, R_ES, 0);
1103     cpu_x86_load_seg(env, R_FS, 0);
1104     cpu_x86_load_seg(env, R_GS, 0);
1105 #endif
1106 #elif defined(TARGET_SPARC)
1107     {
1108         int i;
1109         env->pc = regs->pc;
1110         env->npc = regs->npc;
1111         env->y = regs->y;
1112         for(i = 0; i < 8; i++)
1113             env->gregs[i] = regs->u_regs[i];
1114         for(i = 0; i < 8; i++)
1115             env->regwptr[i] = regs->u_regs[i + 8];
1116     }
1117 #else
1118 #error unsupported target CPU
1119 #endif
1120
1121     if (gdbstub_port) {
1122         gdbserver_start (gdbstub_port);
1123         gdb_handlesig(cpu, 0);
1124     }
1125     cpu_loop(env);
1126     /* never exits */
1127     return 0;
1128 }