bsd-user/main.c

   1 /*
   2  *  qemu user main
   3  *
   4  *  Copyright (c) 2003-2008 Fabrice Bellard
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19 #include <stdlib.h>
  20 #include <stdio.h>
  21 #include <stdarg.h>
  22 #include <string.h>
  23 #include <errno.h>
  24 #include <unistd.h>
  25 #include <machine/trap.h>
  26 #include <sys/types.h>
  27 #include <sys/mman.h>
  28
  29 #include "qemu.h"
  30 #include "qemu-common.h"
  31 /* For tb_lock */
  32 #include "cpu.h"
  33 #include "tcg.h"
  34 #include "qemu/timer.h"
  35 #include "qemu/envlist.h"
  36
  37 int singlestep;
  38 unsigned long mmap_min_addr;
  39 unsigned long guest_base;
  40 int have_guest_base;
  41 unsigned long reserved_va;
  42
  43 static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX;
  44 const char *qemu_uname_release;
  45 extern char **environ;
  46 enum BSDType bsd_type;
  47
  48 /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
  49    we allocate a bigger stack. Need a better solution, for example
  50    by remapping the process stack directly at the right place */
  51 unsigned long x86_stack_size = 512 * 1024;
  52
  53 void gemu_log(const char *fmt, ...)
  54 {
  55     va_list ap;
  56
  57     va_start(ap, fmt);
  58     vfprintf(stderr, fmt, ap);
  59     va_end(ap);
  60 }
  61
  62 #if defined(TARGET_I386)
  63 int cpu_get_pic_interrupt(CPUX86State *env)
  64 {
  65     return -1;
  66 }
  67 #endif
  68
  69 /* These are no-ops because we are not threadsafe.  */
  70 static inline void cpu_exec_start(CPUArchState *env)
  71 {
  72 }
  73
  74 static inline void cpu_exec_end(CPUArchState *env)
  75 {
  76 }
  77
  78 static inline void start_exclusive(void)
  79 {
  80 }
  81
  82 static inline void end_exclusive(void)
  83 {
  84 }
  85
  86 void fork_start(void)
  87 {
  88 }
  89
  90 void fork_end(int child)
  91 {
  92     if (child) {
  93         gdbserver_fork(thread_cpu);
  94     }
  95 }
  96
  97 void cpu_list_lock(void)
  98 {
  99 }
 100
 101 void cpu_list_unlock(void)
 102 {
 103 }
 104
 105 #ifdef TARGET_I386
 106 /***********************************************************/
 107 /* CPUX86 core interface */
 108
 109 uint64_t cpu_get_tsc(CPUX86State *env)
 110 {
 111     return cpu_get_host_ticks();
 112 }
 113
 114 static void write_dt(void *ptr, unsigned long addr, unsigned long limit,
 115                      int flags)
 116 {
 117     unsigned int e1, e2;
 118     uint32_t *p;
 119     e1 = (addr << 16) | (limit & 0xffff);
 120     e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
 121     e2 |= flags;
 122     p = ptr;
 123     p[0] = tswap32(e1);
 124     p[1] = tswap32(e2);
 125 }
 126
 127 static uint64_t *idt_table;
 128 #ifdef TARGET_X86_64
 129 static void set_gate64(void *ptr, unsigned int type, unsigned int dpl,
 130                        uint64_t addr, unsigned int sel)
 131 {
 132     uint32_t *p, e1, e2;
 133     e1 = (addr & 0xffff) | (sel << 16);
 134     e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
 135     p = ptr;
 136     p[0] = tswap32(e1);
 137     p[1] = tswap32(e2);
 138     p[2] = tswap32(addr >> 32);
 139     p[3] = 0;
 140 }
 141 /* only dpl matters as we do only user space emulation */
 142 static void set_idt(int n, unsigned int dpl)
 143 {
 144     set_gate64(idt_table + n * 2, 0, dpl, 0, 0);
 145 }
 146 #else
 147 static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
 148                      uint32_t addr, unsigned int sel)
 149 {
 150     uint32_t *p, e1, e2;
 151     e1 = (addr & 0xffff) | (sel << 16);
 152     e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
 153     p = ptr;
 154     p[0] = tswap32(e1);
 155     p[1] = tswap32(e2);
 156 }
 157
 158 /* only dpl matters as we do only user space emulation */
 159 static void set_idt(int n, unsigned int dpl)
 160 {
 161     set_gate(idt_table + n, 0, dpl, 0, 0);
 162 }
 163 #endif
 164
 165 void cpu_loop(CPUX86State *env)
 166 {
 167     X86CPU *cpu = x86_env_get_cpu(env);
 168     CPUState *cs = CPU(cpu);
 169     int trapnr;
 170     abi_ulong pc;
 171     //target_siginfo_t info;
 172
 173     for(;;) {
 174         trapnr = cpu_x86_exec(cs);
 175         switch(trapnr) {
 176         case 0x80:
 177             /* syscall from int $0x80 */
 178             if (bsd_type == target_freebsd) {
 179                 abi_ulong params = (abi_ulong) env->regs[R_ESP] +
 180                     sizeof(int32_t);
 181                 int32_t syscall_nr = env->regs[R_EAX];
 182                 int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8;
 183
 184                 if (syscall_nr == TARGET_FREEBSD_NR_syscall) {
 185                     get_user_s32(syscall_nr, params);
 186                     params += sizeof(int32_t);
 187                 } else if (syscall_nr == TARGET_FREEBSD_NR___syscall) {
 188                     get_user_s32(syscall_nr, params);
 189                     params += sizeof(int64_t);
 190                 }
 191                 get_user_s32(arg1, params);
 192                 params += sizeof(int32_t);
 193                 get_user_s32(arg2, params);
 194                 params += sizeof(int32_t);
 195                 get_user_s32(arg3, params);
 196                 params += sizeof(int32_t);
 197                 get_user_s32(arg4, params);
 198                 params += sizeof(int32_t);
 199                 get_user_s32(arg5, params);
 200                 params += sizeof(int32_t);
 201                 get_user_s32(arg6, params);
 202                 params += sizeof(int32_t);
 203                 get_user_s32(arg7, params);
 204                 params += sizeof(int32_t);
 205                 get_user_s32(arg8, params);
 206                 env->regs[R_EAX] = do_freebsd_syscall(env,
 207                                                       syscall_nr,
 208                                                       arg1,
 209                                                       arg2,
 210                                                       arg3,
 211                                                       arg4,
 212                                                       arg5,
 213                                                       arg6,
 214                                                       arg7,
 215                                                       arg8);
 216             } else { //if (bsd_type == target_openbsd)
 217                 env->regs[R_EAX] = do_openbsd_syscall(env,
 218                                                       env->regs[R_EAX],
 219                                                       env->regs[R_EBX],
 220                                                       env->regs[R_ECX],
 221                                                       env->regs[R_EDX],
 222                                                       env->regs[R_ESI],
 223                                                       env->regs[R_EDI],
 224                                                       env->regs[R_EBP]);
 225             }
 226             if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) {
 227                 env->regs[R_EAX] = -env->regs[R_EAX];
 228                 env->eflags |= CC_C;
 229             } else {
 230                 env->eflags &= ~CC_C;
 231             }
 232             break;
 233 #ifndef TARGET_ABI32
 234         case EXCP_SYSCALL:
 235             /* syscall from syscall instruction */
 236             if (bsd_type == target_freebsd)
 237                 env->regs[R_EAX] = do_freebsd_syscall(env,
 238                                                       env->regs[R_EAX],
 239                                                       env->regs[R_EDI],
 240                                                       env->regs[R_ESI],
 241                                                       env->regs[R_EDX],
 242                                                       env->regs[R_ECX],
 243                                                       env->regs[8],
 244                                                       env->regs[9], 0, 0);
 245             else { //if (bsd_type == target_openbsd)
 246                 env->regs[R_EAX] = do_openbsd_syscall(env,
 247                                                       env->regs[R_EAX],
 248                                                       env->regs[R_EDI],
 249                                                       env->regs[R_ESI],
 250                                                       env->regs[R_EDX],
 251                                                       env->regs[10],
 252                                                       env->regs[8],
 253                                                       env->regs[9]);
 254             }
 255             env->eip = env->exception_next_eip;
 256             if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) {
 257                 env->regs[R_EAX] = -env->regs[R_EAX];
 258                 env->eflags |= CC_C;
 259             } else {
 260                 env->eflags &= ~CC_C;
 261             }
 262             break;
 263 #endif
 264 #if 0
 265         case EXCP0B_NOSEG:
 266         case EXCP0C_STACK:
 267             info.si_signo = SIGBUS;
 268             info.si_errno = 0;
 269             info.si_code = TARGET_SI_KERNEL;
 270             info._sifields._sigfault._addr = 0;
 271             queue_signal(env, info.si_signo, &info);
 272             break;
 273         case EXCP0D_GPF:
 274             /* XXX: potential problem if ABI32 */
 275 #ifndef TARGET_X86_64
 276             if (env->eflags & VM_MASK) {
 277                 handle_vm86_fault(env);
 278             } else
 279 #endif
 280             {
 281                 info.si_signo = SIGSEGV;
 282                 info.si_errno = 0;
 283                 info.si_code = TARGET_SI_KERNEL;
 284                 info._sifields._sigfault._addr = 0;
 285                 queue_signal(env, info.si_signo, &info);
 286             }
 287             break;
 288         case EXCP0E_PAGE:
 289             info.si_signo = SIGSEGV;
 290             info.si_errno = 0;
 291             if (!(env->error_code & 1))
 292                 info.si_code = TARGET_SEGV_MAPERR;
 293             else
 294                 info.si_code = TARGET_SEGV_ACCERR;
 295             info._sifields._sigfault._addr = env->cr[2];
 296             queue_signal(env, info.si_signo, &info);
 297             break;
 298         case EXCP00_DIVZ:
 299 #ifndef TARGET_X86_64
 300             if (env->eflags & VM_MASK) {
 301                 handle_vm86_trap(env, trapnr);
 302             } else
 303 #endif
 304             {
 305                 /* division by zero */
 306                 info.si_signo = SIGFPE;
 307                 info.si_errno = 0;
 308                 info.si_code = TARGET_FPE_INTDIV;
 309                 info._sifields._sigfault._addr = env->eip;
 310                 queue_signal(env, info.si_signo, &info);
 311             }
 312             break;
 313         case EXCP01_DB:
 314         case EXCP03_INT3:
 315 #ifndef TARGET_X86_64
 316             if (env->eflags & VM_MASK) {
 317                 handle_vm86_trap(env, trapnr);
 318             } else
 319 #endif
 320             {
 321                 info.si_signo = SIGTRAP;
 322                 info.si_errno = 0;
 323                 if (trapnr == EXCP01_DB) {
 324                     info.si_code = TARGET_TRAP_BRKPT;
 325                     info._sifields._sigfault._addr = env->eip;
 326                 } else {
 327                     info.si_code = TARGET_SI_KERNEL;
 328                     info._sifields._sigfault._addr = 0;
 329                 }
 330                 queue_signal(env, info.si_signo, &info);
 331             }
 332             break;
 333         case EXCP04_INTO:
 334         case EXCP05_BOUND:
 335 #ifndef TARGET_X86_64
 336             if (env->eflags & VM_MASK) {
 337                 handle_vm86_trap(env, trapnr);
 338             } else
 339 #endif
 340             {
 341                 info.si_signo = SIGSEGV;
 342                 info.si_errno = 0;
 343                 info.si_code = TARGET_SI_KERNEL;
 344                 info._sifields._sigfault._addr = 0;
 345                 queue_signal(env, info.si_signo, &info);
 346             }
 347             break;
 348         case EXCP06_ILLOP:
 349             info.si_signo = SIGILL;
 350             info.si_errno = 0;
 351             info.si_code = TARGET_ILL_ILLOPN;
 352             info._sifields._sigfault._addr = env->eip;
 353             queue_signal(env, info.si_signo, &info);
 354             break;
 355 #endif
 356         case EXCP_INTERRUPT:
 357             /* just indicate that signals should be handled asap */
 358             break;
 359 #if 0
 360         case EXCP_DEBUG:
 361             {
 362                 int sig;
 363
 364                 sig = gdb_handlesig (env, TARGET_SIGTRAP);
 365                 if (sig)
 366                   {
 367                     info.si_signo = sig;
 368                     info.si_errno = 0;
 369                     info.si_code = TARGET_TRAP_BRKPT;
 370                     queue_signal(env, info.si_signo, &info);
 371                   }
 372             }
 373             break;
 374 #endif
 375         default:
 376             pc = env->segs[R_CS].base + env->eip;
 377             fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
 378                     (long)pc, trapnr);
 379             abort();
 380         }
 381         process_pending_signals(env);
 382     }
 383 }
 384 #endif
 385
 386 #ifdef TARGET_SPARC
 387 #define SPARC64_STACK_BIAS 2047
 388
 389 //#define DEBUG_WIN
 390 /* WARNING: dealing with register windows _is_ complicated. More info
 391    can be found at http://www.sics.se/~psm/sparcstack.html */
 392 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index)
 393 {
 394     index = (index + cwp * 16) % (16 * env->nwindows);
 395     /* wrap handling : if cwp is on the last window, then we use the
 396        registers 'after' the end */
 397     if (index < 8 && env->cwp == env->nwindows - 1)
 398         index += 16 * env->nwindows;
 399     return index;
 400 }
 401
 402 /* save the register window 'cwp1' */
 403 static inline void save_window_offset(CPUSPARCState *env, int cwp1)
 404 {
 405     unsigned int i;
 406     abi_ulong sp_ptr;
 407
 408     sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
 409 #ifdef TARGET_SPARC64
 410     if (sp_ptr & 3)
 411         sp_ptr += SPARC64_STACK_BIAS;
 412 #endif
 413 #if defined(DEBUG_WIN)
 414     printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n",
 415            sp_ptr, cwp1);
 416 #endif
 417     for(i = 0; i < 16; i++) {
 418         /* FIXME - what to do if put_user() fails? */
 419         put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
 420         sp_ptr += sizeof(abi_ulong);
 421     }
 422 }
 423
 424 static void save_window(CPUSPARCState *env)
 425 {
 426 #ifndef TARGET_SPARC64
 427     unsigned int new_wim;
 428     new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) &
 429         ((1LL << env->nwindows) - 1);
 430     save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
 431     env->wim = new_wim;
 432 #else
 433     save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
 434     env->cansave++;
 435     env->canrestore--;
 436 #endif
 437 }
 438
 439 static void restore_window(CPUSPARCState *env)
 440 {
 441 #ifndef TARGET_SPARC64
 442     unsigned int new_wim;
 443 #endif
 444     unsigned int i, cwp1;
 445     abi_ulong sp_ptr;
 446
 447 #ifndef TARGET_SPARC64
 448     new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) &
 449         ((1LL << env->nwindows) - 1);
 450 #endif
 451
 452     /* restore the invalid window */
 453     cwp1 = cpu_cwp_inc(env, env->cwp + 1);
 454     sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
 455 #ifdef TARGET_SPARC64
 456     if (sp_ptr & 3)
 457         sp_ptr += SPARC64_STACK_BIAS;
 458 #endif
 459 #if defined(DEBUG_WIN)
 460     printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n",
 461            sp_ptr, cwp1);
 462 #endif
 463     for(i = 0; i < 16; i++) {
 464         /* FIXME - what to do if get_user() fails? */
 465         get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
 466         sp_ptr += sizeof(abi_ulong);
 467     }
 468 #ifdef TARGET_SPARC64
 469     env->canrestore++;
 470     if (env->cleanwin < env->nwindows - 1)
 471         env->cleanwin++;
 472     env->cansave--;
 473 #else
 474     env->wim = new_wim;
 475 #endif
 476 }
 477
 478 static void flush_windows(CPUSPARCState *env)
 479 {
 480     int offset, cwp1;
 481
 482     offset = 1;
 483     for(;;) {
 484         /* if restore would invoke restore_window(), then we can stop */
 485         cwp1 = cpu_cwp_inc(env, env->cwp + offset);
 486 #ifndef TARGET_SPARC64
 487         if (env->wim & (1 << cwp1))
 488             break;
 489 #else
 490         if (env->canrestore == 0)
 491             break;
 492         env->cansave++;
 493         env->canrestore--;
 494 #endif
 495         save_window_offset(env, cwp1);
 496         offset++;
 497     }
 498     cwp1 = cpu_cwp_inc(env, env->cwp + 1);
 499 #ifndef TARGET_SPARC64
 500     /* set wim so that restore will reload the registers */
 501     env->wim = 1 << cwp1;
 502 #endif
 503 #if defined(DEBUG_WIN)
 504     printf("flush_windows: nb=%d\n", offset - 1);
 505 #endif
 506 }
 507
 508 void cpu_loop(CPUSPARCState *env)
 509 {
 510     CPUState *cs = CPU(sparc_env_get_cpu(env));
 511     int trapnr, ret, syscall_nr;
 512     //target_siginfo_t info;
 513
 514     while (1) {
 515         trapnr = cpu_sparc_exec(cs);
 516
 517         switch (trapnr) {
 518 #ifndef TARGET_SPARC64
 519         case 0x80:
 520 #else
 521         /* FreeBSD uses 0x141 for syscalls too */
 522         case 0x141:
 523             if (bsd_type != target_freebsd)
 524                 goto badtrap;
 525         case 0x100:
 526 #endif
 527             syscall_nr = env->gregs[1];
 528             if (bsd_type == target_freebsd)
 529                 ret = do_freebsd_syscall(env, syscall_nr,
 530                                          env->regwptr[0], env->regwptr[1],
 531                                          env->regwptr[2], env->regwptr[3],
 532                                          env->regwptr[4], env->regwptr[5], 0, 0);
 533             else if (bsd_type == target_netbsd)
 534                 ret = do_netbsd_syscall(env, syscall_nr,
 535                                         env->regwptr[0], env->regwptr[1],
 536                                         env->regwptr[2], env->regwptr[3],
 537                                         env->regwptr[4], env->regwptr[5]);
 538             else { //if (bsd_type == target_openbsd)
 539 #if defined(TARGET_SPARC64)
 540                 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG |
 541                                 TARGET_OPENBSD_SYSCALL_G2RFLAG);
 542 #endif
 543                 ret = do_openbsd_syscall(env, syscall_nr,
 544                                          env->regwptr[0], env->regwptr[1],
 545                                          env->regwptr[2], env->regwptr[3],
 546                                          env->regwptr[4], env->regwptr[5]);
 547             }
 548             if ((unsigned int)ret >= (unsigned int)(-515)) {
 549                 ret = -ret;
 550 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
 551                 env->xcc |= PSR_CARRY;
 552 #else
 553                 env->psr |= PSR_CARRY;
 554 #endif
 555             } else {
 556 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
 557                 env->xcc &= ~PSR_CARRY;
 558 #else
 559                 env->psr &= ~PSR_CARRY;
 560 #endif
 561             }
 562             env->regwptr[0] = ret;
 563             /* next instruction */
 564 #if defined(TARGET_SPARC64)
 565             if (bsd_type == target_openbsd &&
 566                 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) {
 567                 env->pc = env->gregs[2];
 568                 env->npc = env->pc + 4;
 569             } else if (bsd_type == target_openbsd &&
 570                        env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) {
 571                 env->pc = env->gregs[7];
 572                 env->npc = env->pc + 4;
 573             } else {
 574                 env->pc = env->npc;
 575                 env->npc = env->npc + 4;
 576             }
 577 #else
 578             env->pc = env->npc;
 579             env->npc = env->npc + 4;
 580 #endif
 581             break;
 582         case 0x83: /* flush windows */
 583 #ifdef TARGET_ABI32
 584         case 0x103:
 585 #endif
 586             flush_windows(env);
 587             /* next instruction */
 588             env->pc = env->npc;
 589             env->npc = env->npc + 4;
 590             break;
 591 #ifndef TARGET_SPARC64
 592         case TT_WIN_OVF: /* window overflow */
 593             save_window(env);
 594             break;
 595         case TT_WIN_UNF: /* window underflow */
 596             restore_window(env);
 597             break;
 598         case TT_TFAULT:
 599         case TT_DFAULT:
 600 #if 0
 601             {
 602                 info.si_signo = SIGSEGV;
 603                 info.si_errno = 0;
 604                 /* XXX: check env->error_code */
 605                 info.si_code = TARGET_SEGV_MAPERR;
 606                 info._sifields._sigfault._addr = env->mmuregs[4];
 607                 queue_signal(env, info.si_signo, &info);
 608             }
 609 #endif
 610             break;
 611 #else
 612         case TT_SPILL: /* window overflow */
 613             save_window(env);
 614             break;
 615         case TT_FILL: /* window underflow */
 616             restore_window(env);
 617             break;
 618         case TT_TFAULT:
 619         case TT_DFAULT:
 620 #if 0
 621             {
 622                 info.si_signo = SIGSEGV;
 623                 info.si_errno = 0;
 624                 /* XXX: check env->error_code */
 625                 info.si_code = TARGET_SEGV_MAPERR;
 626                 if (trapnr == TT_DFAULT)
 627                     info._sifields._sigfault._addr = env->dmmuregs[4];
 628                 else
 629                     info._sifields._sigfault._addr = env->tsptr->tpc;
 630                 //queue_signal(env, info.si_signo, &info);
 631             }
 632 #endif
 633             break;
 634 #endif
 635         case EXCP_INTERRUPT:
 636             /* just indicate that signals should be handled asap */
 637             break;
 638         case EXCP_DEBUG:
 639             {
 640                 int sig;
 641
 642                 sig = gdb_handlesig(cs, TARGET_SIGTRAP);
 643 #if 0
 644                 if (sig)
 645                   {
 646                     info.si_signo = sig;
 647                     info.si_errno = 0;
 648                     info.si_code = TARGET_TRAP_BRKPT;
 649                     //queue_signal(env, info.si_signo, &info);
 650                   }
 651 #endif
 652             }
 653             break;
 654         default:
 655 #ifdef TARGET_SPARC64
 656         badtrap:
 657 #endif
 658             printf ("Unhandled trap: 0x%x\n", trapnr);
 659             cpu_dump_state(cs, stderr, fprintf, 0);
 660             exit (1);
 661         }
 662         process_pending_signals (env);
 663     }
 664 }
 665
 666 #endif
 667
 668 static void usage(void)
 669 {
 670     printf("qemu-" TARGET_NAME " version " QEMU_VERSION ", Copyright (c) 2003-2008 Fabrice Bellard\n"
 671            "usage: qemu-" TARGET_NAME " [options] program [arguments...]\n"
 672            "BSD CPU emulator (compiled for %s emulation)\n"
 673            "\n"
 674            "Standard options:\n"
 675            "-h                print this help\n"
 676            "-g port           wait gdb connection to port\n"
 677            "-L path           set the elf interpreter prefix (default=%s)\n"
 678            "-s size           set the stack size in bytes (default=%ld)\n"
 679            "-cpu model        select CPU (-cpu help for list)\n"
 680            "-drop-ld-preload  drop LD_PRELOAD for target process\n"
 681            "-E var=value      sets/modifies targets environment variable(s)\n"
 682            "-U var            unsets targets environment variable(s)\n"
 683            "-B address        set guest_base address to address\n"
 684            "-bsd type         select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n"
 685            "\n"
 686            "Debug options:\n"
 687            "-d item1[,...]    enable logging of specified items\n"
 688            "                  (use '-d help' for a list of log items)\n"
 689            "-D logfile        write logs to 'logfile' (default stderr)\n"
 690            "-p pagesize       set the host page size to 'pagesize'\n"
 691            "-singlestep       always run in singlestep mode\n"
 692            "-strace           log system calls\n"
 693            "\n"
 694            "Environment variables:\n"
 695            "QEMU_STRACE       Print system calls and arguments similar to the\n"
 696            "                  'strace' program.  Enable by setting to any value.\n"
 697            "You can use -E and -U options to set/unset environment variables\n"
 698            "for target process.  It is possible to provide several variables\n"
 699            "by repeating the option.  For example:\n"
 700            "    -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n"
 701            "Note that if you provide several changes to single variable\n"
 702            "last change will stay in effect.\n"
 703            ,
 704            TARGET_NAME,
 705            interp_prefix,
 706            x86_stack_size);
 707     exit(1);
 708 }
 709
 710 THREAD CPUState *thread_cpu;
 711
 712 /* Assumes contents are already zeroed.  */
 713 void init_task_state(TaskState *ts)
 714 {
 715     int i;
 716
 717     ts->used = 1;
 718     ts->first_free = ts->sigqueue_table;
 719     for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) {
 720         ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1];
 721     }
 722     ts->sigqueue_table[i].next = NULL;
 723 }
 724
 725 int main(int argc, char **argv)
 726 {
 727     const char *filename;
 728     const char *cpu_model;
 729     const char *log_file = NULL;
 730     const char *log_mask = NULL;
 731     struct target_pt_regs regs1, *regs = &regs1;
 732     struct image_info info1, *info = &info1;
 733     TaskState ts1, *ts = &ts1;
 734     CPUArchState *env;
 735     CPUState *cpu;
 736     int optind;
 737     const char *r;
 738     int gdbstub_port = 0;
 739     char **target_environ, **wrk;
 740     envlist_t *envlist = NULL;
 741     bsd_type = target_openbsd;
 742
 743     if (argc <= 1)
 744         usage();
 745
 746     module_call_init(MODULE_INIT_QOM);
 747
 748     if ((envlist = envlist_create()) == NULL) {
 749         (void) fprintf(stderr, "Unable to allocate envlist\n");
 750         exit(1);
 751     }
 752
 753     /* add current environment into the list */
 754     for (wrk = environ; *wrk != NULL; wrk++) {
 755         (void) envlist_setenv(envlist, *wrk);
 756     }
 757
 758     cpu_model = NULL;
 759 #if defined(cpudef_setup)
 760     cpudef_setup(); /* parse cpu definitions in target config file (TBD) */
 761 #endif
 762
 763     optind = 1;
 764     for(;;) {
 765         if (optind >= argc)
 766             break;
 767         r = argv[optind];
 768         if (r[0] != '-')
 769             break;
 770         optind++;
 771         r++;
 772         if (!strcmp(r, "-")) {
 773             break;
 774         } else if (!strcmp(r, "d")) {
 775             if (optind >= argc) {
 776                 break;
 777             }
 778             log_mask = argv[optind++];
 779         } else if (!strcmp(r, "D")) {
 780             if (optind >= argc) {
 781                 break;
 782             }
 783             log_file = argv[optind++];
 784         } else if (!strcmp(r, "E")) {
 785             r = argv[optind++];
 786             if (envlist_setenv(envlist, r) != 0)
 787                 usage();
 788         } else if (!strcmp(r, "ignore-environment")) {
 789             envlist_free(envlist);
 790             if ((envlist = envlist_create()) == NULL) {
 791                 (void) fprintf(stderr, "Unable to allocate envlist\n");
 792                 exit(1);
 793             }
 794         } else if (!strcmp(r, "U")) {
 795             r = argv[optind++];
 796             if (envlist_unsetenv(envlist, r) != 0)
 797                 usage();
 798         } else if (!strcmp(r, "s")) {
 799             r = argv[optind++];
 800             x86_stack_size = strtol(r, (char **)&r, 0);
 801             if (x86_stack_size <= 0)
 802                 usage();
 803             if (*r == 'M')
 804                 x86_stack_size *= 1024 * 1024;
 805             else if (*r == 'k' || *r == 'K')
 806                 x86_stack_size *= 1024;
 807         } else if (!strcmp(r, "L")) {
 808             interp_prefix = argv[optind++];
 809         } else if (!strcmp(r, "p")) {
 810             qemu_host_page_size = atoi(argv[optind++]);
 811             if (qemu_host_page_size == 0 ||
 812                 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
 813                 fprintf(stderr, "page size must be a power of two\n");
 814                 exit(1);
 815             }
 816         } else if (!strcmp(r, "g")) {
 817             gdbstub_port = atoi(argv[optind++]);
 818         } else if (!strcmp(r, "r")) {
 819             qemu_uname_release = argv[optind++];
 820         } else if (!strcmp(r, "cpu")) {
 821             cpu_model = argv[optind++];
 822             if (is_help_option(cpu_model)) {
 823 /* XXX: implement xxx_cpu_list for targets that still miss it */
 824 #if defined(cpu_list)
 825                     cpu_list(stdout, &fprintf);
 826 #endif
 827                 exit(1);
 828             }
 829         } else if (!strcmp(r, "B")) {
 830            guest_base = strtol(argv[optind++], NULL, 0);
 831            have_guest_base = 1;
 832         } else if (!strcmp(r, "drop-ld-preload")) {
 833             (void) envlist_unsetenv(envlist, "LD_PRELOAD");
 834         } else if (!strcmp(r, "bsd")) {
 835             if (!strcasecmp(argv[optind], "freebsd")) {
 836                 bsd_type = target_freebsd;
 837             } else if (!strcasecmp(argv[optind], "netbsd")) {
 838                 bsd_type = target_netbsd;
 839             } else if (!strcasecmp(argv[optind], "openbsd")) {
 840                 bsd_type = target_openbsd;
 841             } else {
 842                 usage();
 843             }
 844             optind++;
 845         } else if (!strcmp(r, "singlestep")) {
 846             singlestep = 1;
 847         } else if (!strcmp(r, "strace")) {
 848             do_strace = 1;
 849         } else
 850         {
 851             usage();
 852         }
 853     }
 854
 855     /* init debug */
 856     qemu_set_log_filename(log_file);
 857     if (log_mask) {
 858         int mask;
 859
 860         mask = qemu_str_to_log_mask(log_mask);
 861         if (!mask) {
 862             qemu_print_log_usage(stdout);
 863             exit(1);
 864         }
 865         qemu_set_log(mask);
 866     }
 867
 868     if (optind >= argc) {
 869         usage();
 870     }
 871     filename = argv[optind];
 872
 873     /* Zero out regs */
 874     memset(regs, 0, sizeof(struct target_pt_regs));
 875
 876     /* Zero out image_info */
 877     memset(info, 0, sizeof(struct image_info));
 878
 879     /* Scan interp_prefix dir for replacement files. */
 880     init_paths(interp_prefix);
 881
 882     if (cpu_model == NULL) {
 883 #if defined(TARGET_I386)
 884 #ifdef TARGET_X86_64
 885         cpu_model = "qemu64";
 886 #else
 887         cpu_model = "qemu32";
 888 #endif
 889 #elif defined(TARGET_SPARC)
 890 #ifdef TARGET_SPARC64
 891         cpu_model = "TI UltraSparc II";
 892 #else
 893         cpu_model = "Fujitsu MB86904";
 894 #endif
 895 #else
 896         cpu_model = "any";
 897 #endif
 898     }
 899     tcg_exec_init(0);
 900     /* NOTE: we need to init the CPU at this stage to get
 901        qemu_host_page_size */
 902     cpu = cpu_init(cpu_model);
 903     if (!cpu) {
 904         fprintf(stderr, "Unable to find CPU definition\n");
 905         exit(1);
 906     }
 907     env = cpu->env_ptr;
 908 #if defined(TARGET_SPARC) || defined(TARGET_PPC)
 909     cpu_reset(cpu);
 910 #endif
 911     thread_cpu = cpu;
 912
 913     if (getenv("QEMU_STRACE")) {
 914         do_strace = 1;
 915     }
 916
 917     target_environ = envlist_to_environ(envlist, NULL);
 918     envlist_free(envlist);
 919
 920     /*
 921      * Now that page sizes are configured in cpu_init() we can do
 922      * proper page alignment for guest_base.
 923      */
 924     guest_base = HOST_PAGE_ALIGN(guest_base);
 925
 926     /*
 927      * Read in mmap_min_addr kernel parameter.  This value is used
 928      * When loading the ELF image to determine whether guest_base
 929      * is needed.
 930      *
 931      * When user has explicitly set the quest base, we skip this
 932      * test.
 933      */
 934     if (!have_guest_base) {
 935         FILE *fp;
 936
 937         if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) {
 938             unsigned long tmp;
 939             if (fscanf(fp, "%lu", &tmp) == 1) {
 940                 mmap_min_addr = tmp;
 941                 qemu_log("host mmap_min_addr=0x%lx\n", mmap_min_addr);
 942             }
 943             fclose(fp);
 944         }
 945     }
 946
 947     if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) {
 948         printf("Error loading %s\n", filename);
 949         _exit(1);
 950     }
 951
 952     for (wrk = target_environ; *wrk; wrk++) {
 953         free(*wrk);
 954     }
 955
 956     free(target_environ);
 957
 958     if (qemu_log_enabled()) {
 959         qemu_log("guest_base  0x%lx\n", guest_base);
 960         log_page_dump();
 961
 962         qemu_log("start_brk   0x" TARGET_ABI_FMT_lx "\n", info->start_brk);
 963         qemu_log("end_code    0x" TARGET_ABI_FMT_lx "\n", info->end_code);
 964         qemu_log("start_code  0x" TARGET_ABI_FMT_lx "\n",
 965                  info->start_code);
 966         qemu_log("start_data  0x" TARGET_ABI_FMT_lx "\n",
 967                  info->start_data);
 968         qemu_log("end_data    0x" TARGET_ABI_FMT_lx "\n", info->end_data);
 969         qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n",
 970                  info->start_stack);
 971         qemu_log("brk         0x" TARGET_ABI_FMT_lx "\n", info->brk);
 972         qemu_log("entry       0x" TARGET_ABI_FMT_lx "\n", info->entry);
 973     }
 974
 975     target_set_brk(info->brk);
 976     syscall_init();
 977     signal_init();
 978
 979     /* Now that we've loaded the binary, GUEST_BASE is fixed.  Delay
 980        generating the prologue until now so that the prologue can take
 981        the real value of GUEST_BASE into account.  */
 982     tcg_prologue_init(&tcg_ctx);
 983
 984     /* build Task State */
 985     memset(ts, 0, sizeof(TaskState));
 986     init_task_state(ts);
 987     ts->info = info;
 988     cpu->opaque = ts;
 989
 990 #if defined(TARGET_I386)
 991     env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
 992     env->hflags |= HF_PE_MASK | HF_CPL_MASK;
 993     if (env->features[FEAT_1_EDX] & CPUID_SSE) {
 994         env->cr[4] |= CR4_OSFXSR_MASK;
 995         env->hflags |= HF_OSFXSR_MASK;
 996     }
 997 #ifndef TARGET_ABI32
 998     /* enable 64 bit mode if possible */
 999     if (!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM)) {
1000         fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n");
1001         exit(1);
1002     }
1003     env->cr[4] |= CR4_PAE_MASK;
1004     env->efer |= MSR_EFER_LMA | MSR_EFER_LME;
1005     env->hflags |= HF_LMA_MASK;
1006 #endif
1007
1008     /* flags setup : we activate the IRQs by default as in user mode */
1009     env->eflags |= IF_MASK;
1010
1011     /* linux register setup */
1012 #ifndef TARGET_ABI32
1013     env->regs[R_EAX] = regs->rax;
1014     env->regs[R_EBX] = regs->rbx;
1015     env->regs[R_ECX] = regs->rcx;
1016     env->regs[R_EDX] = regs->rdx;
1017     env->regs[R_ESI] = regs->rsi;
1018     env->regs[R_EDI] = regs->rdi;
1019     env->regs[R_EBP] = regs->rbp;
1020     env->regs[R_ESP] = regs->rsp;
1021     env->eip = regs->rip;
1022 #else
1023     env->regs[R_EAX] = regs->eax;
1024     env->regs[R_EBX] = regs->ebx;
1025     env->regs[R_ECX] = regs->ecx;
1026     env->regs[R_EDX] = regs->edx;
1027     env->regs[R_ESI] = regs->esi;
1028     env->regs[R_EDI] = regs->edi;
1029     env->regs[R_EBP] = regs->ebp;
1030     env->regs[R_ESP] = regs->esp;
1031     env->eip = regs->eip;
1032 #endif
1033
1034     /* linux interrupt setup */
1035 #ifndef TARGET_ABI32
1036     env->idt.limit = 511;
1037 #else
1038     env->idt.limit = 255;
1039 #endif
1040     env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1),
1041                                 PROT_READ|PROT_WRITE,
1042                                 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1043     idt_table = g2h(env->idt.base);
1044     set_idt(0, 0);
1045     set_idt(1, 0);
1046     set_idt(2, 0);
1047     set_idt(3, 3);
1048     set_idt(4, 3);
1049     set_idt(5, 0);
1050     set_idt(6, 0);
1051     set_idt(7, 0);
1052     set_idt(8, 0);
1053     set_idt(9, 0);
1054     set_idt(10, 0);
1055     set_idt(11, 0);
1056     set_idt(12, 0);
1057     set_idt(13, 0);
1058     set_idt(14, 0);
1059     set_idt(15, 0);
1060     set_idt(16, 0);
1061     set_idt(17, 0);
1062     set_idt(18, 0);
1063     set_idt(19, 0);
1064     set_idt(0x80, 3);
1065
1066     /* linux segment setup */
1067     {
1068         uint64_t *gdt_table;
1069         env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES,
1070                                     PROT_READ|PROT_WRITE,
1071                                     MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1072         env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1;
1073         gdt_table = g2h(env->gdt.base);
1074 #ifdef TARGET_ABI32
1075         write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1076                  DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1077                  (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1078 #else
1079         /* 64 bit code segment */
1080         write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1081                  DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1082                  DESC_L_MASK |
1083                  (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1084 #endif
1085         write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff,
1086                  DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1087                  (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
1088     }
1089
1090     cpu_x86_load_seg(env, R_CS, __USER_CS);
1091     cpu_x86_load_seg(env, R_SS, __USER_DS);
1092 #ifdef TARGET_ABI32
1093     cpu_x86_load_seg(env, R_DS, __USER_DS);
1094     cpu_x86_load_seg(env, R_ES, __USER_DS);
1095     cpu_x86_load_seg(env, R_FS, __USER_DS);
1096     cpu_x86_load_seg(env, R_GS, __USER_DS);
1097     /* This hack makes Wine work... */
1098     env->segs[R_FS].selector = 0;
1099 #else
1100     cpu_x86_load_seg(env, R_DS, 0);
1101     cpu_x86_load_seg(env, R_ES, 0);
1102     cpu_x86_load_seg(env, R_FS, 0);
1103     cpu_x86_load_seg(env, R_GS, 0);
1104 #endif
1105 #elif defined(TARGET_SPARC)
1106     {
1107         int i;
1108         env->pc = regs->pc;
1109         env->npc = regs->npc;
1110         env->y = regs->y;
1111         for(i = 0; i < 8; i++)
1112             env->gregs[i] = regs->u_regs[i];
1113         for(i = 0; i < 8; i++)
1114             env->regwptr[i] = regs->u_regs[i + 8];
1115     }
1116 #else
1117 #error unsupported target CPU
1118 #endif
1119
1120     if (gdbstub_port) {
1121         gdbserver_start (gdbstub_port);
1122         gdb_handlesig(cpu, 0);
1123     }
1124     cpu_loop(env);
1125     /* never exits */
1126     return 0;
1127 }