linux-user/main.c

   1 /*
   2  *  qemu user main
   3  *
   4  *  Copyright (c) 2003 Fabrice Bellard
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  */
  20 #include <stdlib.h>
  21 #include <stdio.h>
  22 #include <stdarg.h>
  23 #include <string.h>
  24 #include <errno.h>
  25 #include <unistd.h>
  26
  27 #include "qemu.h"
  28
  29 #define DEBUG_LOGFILE "/tmp/qemu.log"
  30
  31 #ifdef __APPLE__
  32 #include <crt_externs.h>
  33 # define environ  (*_NSGetEnviron())
  34 #endif
  35
  36 static const char *interp_prefix = CONFIG_QEMU_PREFIX;
  37
  38 #if defined(__i386__) && !defined(CONFIG_STATIC)
  39 /* Force usage of an ELF interpreter even if it is an ELF shared
  40    object ! */
  41 const char interp[] __attribute__((section(".interp"))) = "/lib/ld-linux.so.2";
  42 #endif
  43
  44 /* for recent libc, we add these dummy symbols which are not declared
  45    when generating a linked object (bug in ld ?) */
  46 #if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(CONFIG_STATIC)
  47 long __preinit_array_start[0];
  48 long __preinit_array_end[0];
  49 long __init_array_start[0];
  50 long __init_array_end[0];
  51 long __fini_array_start[0];
  52 long __fini_array_end[0];
  53 #endif
  54
  55 /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
  56    we allocate a bigger stack. Need a better solution, for example
  57    by remapping the process stack directly at the right place */
  58 unsigned long x86_stack_size = 512 * 1024;
  59
  60 void gemu_log(const char *fmt, ...)
  61 {
  62     va_list ap;
  63
  64     va_start(ap, fmt);
  65     vfprintf(stderr, fmt, ap);
  66     va_end(ap);
  67 }
  68
  69 void cpu_outb(CPUState *env, int addr, int val)
  70 {
  71     fprintf(stderr, "outb: port=0x%04x, data=%02x\n", addr, val);
  72 }
  73
  74 void cpu_outw(CPUState *env, int addr, int val)
  75 {
  76     fprintf(stderr, "outw: port=0x%04x, data=%04x\n", addr, val);
  77 }
  78
  79 void cpu_outl(CPUState *env, int addr, int val)
  80 {
  81     fprintf(stderr, "outl: port=0x%04x, data=%08x\n", addr, val);
  82 }
  83
  84 int cpu_inb(CPUState *env, int addr)
  85 {
  86     fprintf(stderr, "inb: port=0x%04x\n", addr);
  87     return 0;
  88 }
  89
  90 int cpu_inw(CPUState *env, int addr)
  91 {
  92     fprintf(stderr, "inw: port=0x%04x\n", addr);
  93     return 0;
  94 }
  95
  96 int cpu_inl(CPUState *env, int addr)
  97 {
  98     fprintf(stderr, "inl: port=0x%04x\n", addr);
  99     return 0;
 100 }
 101
 102 int cpu_get_pic_interrupt(CPUState *env)
 103 {
 104     return -1;
 105 }
 106
 107 /* timers for rdtsc */
 108
 109 #if defined(__i386__)
 110
 111 int64_t cpu_get_real_ticks(void)
 112 {
 113     int64_t val;
 114     asm volatile ("rdtsc" : "=A" (val));
 115     return val;
 116 }
 117
 118 #elif defined(__x86_64__)
 119
 120 int64_t cpu_get_real_ticks(void)
 121 {
 122     uint32_t low,high;
 123     int64_t val;
 124     asm volatile("rdtsc" : "=a" (low), "=d" (high));
 125     val = high;
 126     val <<= 32;
 127     val |= low;
 128     return val;
 129 }
 130
 131 #else
 132
 133 static uint64_t emu_time;
 134
 135 int64_t cpu_get_real_ticks(void)
 136 {
 137     return emu_time++;
 138 }
 139
 140 #endif
 141
 142 #ifdef TARGET_I386
 143 /***********************************************************/
 144 /* CPUX86 core interface */
 145
 146 uint64_t cpu_get_tsc(CPUX86State *env)
 147 {
 148     return cpu_get_real_ticks();
 149 }
 150
 151 static void write_dt(void *ptr, unsigned long addr, unsigned long limit,
 152                      int flags)
 153 {
 154     unsigned int e1, e2;
 155     e1 = (addr << 16) | (limit & 0xffff);
 156     e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
 157     e2 |= flags;
 158     stl((uint8_t *)ptr, e1);
 159     stl((uint8_t *)ptr + 4, e2);
 160 }
 161
 162 static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
 163                      unsigned long addr, unsigned int sel)
 164 {
 165     unsigned int e1, e2;
 166     e1 = (addr & 0xffff) | (sel << 16);
 167     e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
 168     stl((uint8_t *)ptr, e1);
 169     stl((uint8_t *)ptr + 4, e2);
 170 }
 171
 172 uint64_t gdt_table[6];
 173 uint64_t idt_table[256];
 174
 175 /* only dpl matters as we do only user space emulation */
 176 static void set_idt(int n, unsigned int dpl)
 177 {
 178     set_gate(idt_table + n, 0, dpl, 0, 0);
 179 }
 180
 181 void cpu_loop(CPUX86State *env)
 182 {
 183     int trapnr;
 184     target_ulong pc;
 185     target_siginfo_t info;
 186
 187     for(;;) {
 188         trapnr = cpu_x86_exec(env);
 189         switch(trapnr) {
 190         case 0x80:
 191             /* linux syscall */
 192             env->regs[R_EAX] = do_syscall(env,
 193                                           env->regs[R_EAX],
 194                                           env->regs[R_EBX],
 195                                           env->regs[R_ECX],
 196                                           env->regs[R_EDX],
 197                                           env->regs[R_ESI],
 198                                           env->regs[R_EDI],
 199                                           env->regs[R_EBP]);
 200             break;
 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(info.si_signo, &info);
 208             break;
 209         case EXCP0D_GPF:
 210             if (env->eflags & VM_MASK) {
 211                 handle_vm86_fault(env);
 212             } else {
 213                 info.si_signo = SIGSEGV;
 214                 info.si_errno = 0;
 215                 info.si_code = TARGET_SI_KERNEL;
 216                 info._sifields._sigfault._addr = 0;
 217                 queue_signal(info.si_signo, &info);
 218             }
 219             break;
 220         case EXCP0E_PAGE:
 221             info.si_signo = SIGSEGV;
 222             info.si_errno = 0;
 223             if (!(env->error_code & 1))
 224                 info.si_code = TARGET_SEGV_MAPERR;
 225             else
 226                 info.si_code = TARGET_SEGV_ACCERR;
 227             info._sifields._sigfault._addr = env->cr[2];
 228             queue_signal(info.si_signo, &info);
 229             break;
 230         case EXCP00_DIVZ:
 231             if (env->eflags & VM_MASK) {
 232                 handle_vm86_trap(env, trapnr);
 233             } else {
 234                 /* division by zero */
 235                 info.si_signo = SIGFPE;
 236                 info.si_errno = 0;
 237                 info.si_code = TARGET_FPE_INTDIV;
 238                 info._sifields._sigfault._addr = env->eip;
 239                 queue_signal(info.si_signo, &info);
 240             }
 241             break;
 242         case EXCP01_SSTP:
 243         case EXCP03_INT3:
 244             if (env->eflags & VM_MASK) {
 245                 handle_vm86_trap(env, trapnr);
 246             } else {
 247                 info.si_signo = SIGTRAP;
 248                 info.si_errno = 0;
 249                 if (trapnr == EXCP01_SSTP) {
 250                     info.si_code = TARGET_TRAP_BRKPT;
 251                     info._sifields._sigfault._addr = env->eip;
 252                 } else {
 253                     info.si_code = TARGET_SI_KERNEL;
 254                     info._sifields._sigfault._addr = 0;
 255                 }
 256                 queue_signal(info.si_signo, &info);
 257             }
 258             break;
 259         case EXCP04_INTO:
 260         case EXCP05_BOUND:
 261             if (env->eflags & VM_MASK) {
 262                 handle_vm86_trap(env, trapnr);
 263             } else {
 264                 info.si_signo = SIGSEGV;
 265                 info.si_errno = 0;
 266                 info.si_code = TARGET_SI_KERNEL;
 267                 info._sifields._sigfault._addr = 0;
 268                 queue_signal(info.si_signo, &info);
 269             }
 270             break;
 271         case EXCP06_ILLOP:
 272             info.si_signo = SIGILL;
 273             info.si_errno = 0;
 274             info.si_code = TARGET_ILL_ILLOPN;
 275             info._sifields._sigfault._addr = env->eip;
 276             queue_signal(info.si_signo, &info);
 277             break;
 278         case EXCP_INTERRUPT:
 279             /* just indicate that signals should be handled asap */
 280             break;
 281         case EXCP_DEBUG:
 282             {
 283                 int sig;
 284
 285                 sig = gdb_handlesig (env, TARGET_SIGTRAP);
 286                 if (sig)
 287                   {
 288                     info.si_signo = sig;
 289                     info.si_errno = 0;
 290                     info.si_code = TARGET_TRAP_BRKPT;
 291                     queue_signal(info.si_signo, &info);
 292                   }
 293             }
 294             break;
 295         default:
 296             pc = env->segs[R_CS].base + env->eip;
 297             fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
 298                     (long)pc, trapnr);
 299             abort();
 300         }
 301         process_pending_signals(env);
 302     }
 303 }
 304 #endif
 305
 306 #ifdef TARGET_ARM
 307
 308 /* XXX: find a better solution */
 309 extern void tb_invalidate_page_range(target_ulong start, target_ulong end);
 310
 311 static void arm_cache_flush(target_ulong start, target_ulong last)
 312 {
 313     target_ulong addr, last1;
 314
 315     if (last < start)
 316         return;
 317     addr = start;
 318     for(;;) {
 319         last1 = ((addr + TARGET_PAGE_SIZE) & TARGET_PAGE_MASK) - 1;
 320         if (last1 > last)
 321             last1 = last;
 322         tb_invalidate_page_range(addr, last1 + 1);
 323         if (last1 == last)
 324             break;
 325         addr = last1 + 1;
 326     }
 327 }
 328
 329 void cpu_loop(CPUARMState *env)
 330 {
 331     int trapnr;
 332     unsigned int n, insn;
 333     target_siginfo_t info;
 334
 335     for(;;) {
 336         trapnr = cpu_arm_exec(env);
 337         switch(trapnr) {
 338         case EXCP_UDEF:
 339             {
 340                 TaskState *ts = env->opaque;
 341                 uint32_t opcode;
 342
 343                 /* we handle the FPU emulation here, as Linux */
 344                 /* we get the opcode */
 345                 opcode = ldl_raw((uint8_t *)env->regs[15]);
 346
 347                 if (EmulateAll(opcode, &ts->fpa, env->regs) == 0) {
 348                     info.si_signo = SIGILL;
 349                     info.si_errno = 0;
 350                     info.si_code = TARGET_ILL_ILLOPN;
 351                     info._sifields._sigfault._addr = env->regs[15];
 352                     queue_signal(info.si_signo, &info);
 353                 } else {
 354                     /* increment PC */
 355                     env->regs[15] += 4;
 356                 }
 357             }
 358             break;
 359         case EXCP_SWI:
 360             {
 361                 /* system call */
 362                 if (env->thumb) {
 363                     insn = lduw((void *)(env->regs[15] - 2));
 364                     n = insn & 0xff;
 365                 } else {
 366                     insn = ldl((void *)(env->regs[15] - 4));
 367                     n = insn & 0xffffff;
 368                 }
 369
 370                 if (n == ARM_NR_cacheflush) {
 371                     arm_cache_flush(env->regs[0], env->regs[1]);
 372                 } else if (n == ARM_NR_semihosting
 373                            || n == ARM_NR_thumb_semihosting) {
 374                     env->regs[0] = do_arm_semihosting (env);
 375                 } else if (n >= ARM_SYSCALL_BASE
 376                            || (env->thumb && n == ARM_THUMB_SYSCALL)) {
 377                     /* linux syscall */
 378                     if (env->thumb) {
 379                         n = env->regs[7];
 380                     } else {
 381                         n -= ARM_SYSCALL_BASE;
 382                     }
 383                     env->regs[0] = do_syscall(env,
 384                                               n,
 385                                               env->regs[0],
 386                                               env->regs[1],
 387                                               env->regs[2],
 388                                               env->regs[3],
 389                                               env->regs[4],
 390                                               env->regs[5]);
 391                 } else {
 392                     goto error;
 393                 }
 394             }
 395             break;
 396         case EXCP_INTERRUPT:
 397             /* just indicate that signals should be handled asap */
 398             break;
 399         case EXCP_PREFETCH_ABORT:
 400         case EXCP_DATA_ABORT:
 401             {
 402                 info.si_signo = SIGSEGV;
 403                 info.si_errno = 0;
 404                 /* XXX: check env->error_code */
 405                 info.si_code = TARGET_SEGV_MAPERR;
 406                 info._sifields._sigfault._addr = env->cp15_6;
 407                 queue_signal(info.si_signo, &info);
 408             }
 409             break;
 410         case EXCP_DEBUG:
 411             {
 412                 int sig;
 413
 414                 sig = gdb_handlesig (env, TARGET_SIGTRAP);
 415                 if (sig)
 416                   {
 417                     info.si_signo = sig;
 418                     info.si_errno = 0;
 419                     info.si_code = TARGET_TRAP_BRKPT;
 420                     queue_signal(info.si_signo, &info);
 421                   }
 422             }
 423             break;
 424         default:
 425         error:
 426             fprintf(stderr, "qemu: unhandled CPU exception 0x%x - aborting\n",
 427                     trapnr);
 428             cpu_dump_state(env, stderr, fprintf, 0);
 429             abort();
 430         }
 431         process_pending_signals(env);
 432     }
 433 }
 434
 435 #endif
 436
 437 #ifdef TARGET_SPARC
 438
 439 //#define DEBUG_WIN
 440
 441 /* WARNING: dealing with register windows _is_ complicated. More info
 442    can be found at http://www.sics.se/~psm/sparcstack.html */
 443 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index)
 444 {
 445     index = (index + cwp * 16) & (16 * NWINDOWS - 1);
 446     /* wrap handling : if cwp is on the last window, then we use the
 447        registers 'after' the end */
 448     if (index < 8 && env->cwp == (NWINDOWS - 1))
 449         index += (16 * NWINDOWS);
 450     return index;
 451 }
 452
 453 /* save the register window 'cwp1' */
 454 static inline void save_window_offset(CPUSPARCState *env, int cwp1)
 455 {
 456     unsigned int i;
 457     uint32_t *sp_ptr;
 458
 459     sp_ptr = (uint32_t *)(env->regbase[get_reg_index(env, cwp1, 6)]);
 460 #if defined(DEBUG_WIN)
 461     printf("win_overflow: sp_ptr=0x%x save_cwp=%d\n",
 462            (int)sp_ptr, cwp1);
 463 #endif
 464     for(i = 0; i < 16; i++) {
 465         put_user(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
 466         sp_ptr++;
 467     }
 468 }
 469
 470 static void save_window(CPUSPARCState *env)
 471 {
 472     unsigned int new_wim;
 473     new_wim = ((env->wim >> 1) | (env->wim << (NWINDOWS - 1))) &
 474         ((1LL << NWINDOWS) - 1);
 475     save_window_offset(env, (env->cwp - 2) & (NWINDOWS - 1));
 476     env->wim = new_wim;
 477 }
 478
 479 static void restore_window(CPUSPARCState *env)
 480 {
 481     unsigned int new_wim, i, cwp1;
 482     uint32_t *sp_ptr, reg;
 483
 484     new_wim = ((env->wim << 1) | (env->wim >> (NWINDOWS - 1))) &
 485         ((1LL << NWINDOWS) - 1);
 486
 487     /* restore the invalid window */
 488     cwp1 = (env->cwp + 1) & (NWINDOWS - 1);
 489     sp_ptr = (uint32_t *)(env->regbase[get_reg_index(env, cwp1, 6)]);
 490 #if defined(DEBUG_WIN)
 491     printf("win_underflow: sp_ptr=0x%x load_cwp=%d\n",
 492            (int)sp_ptr, cwp1);
 493 #endif
 494     for(i = 0; i < 16; i++) {
 495         get_user(reg, sp_ptr);
 496         env->regbase[get_reg_index(env, cwp1, 8 + i)] = reg;
 497         sp_ptr++;
 498     }
 499     env->wim = new_wim;
 500 }
 501
 502 static void flush_windows(CPUSPARCState *env)
 503 {
 504     int offset, cwp1;
 505
 506     offset = 1;
 507     for(;;) {
 508         /* if restore would invoke restore_window(), then we can stop */
 509         cwp1 = (env->cwp + offset) & (NWINDOWS - 1);
 510         if (env->wim & (1 << cwp1))
 511             break;
 512         save_window_offset(env, cwp1);
 513         offset++;
 514     }
 515     /* set wim so that restore will reload the registers */
 516     cwp1 = (env->cwp + 1) & (NWINDOWS - 1);
 517     env->wim = 1 << cwp1;
 518 #if defined(DEBUG_WIN)
 519     printf("flush_windows: nb=%d\n", offset - 1);
 520 #endif
 521 }
 522
 523 void cpu_loop (CPUSPARCState *env)
 524 {
 525     int trapnr, ret;
 526     target_siginfo_t info;
 527
 528     while (1) {
 529         trapnr = cpu_sparc_exec (env);
 530
 531         switch (trapnr) {
 532         case 0x88:
 533         case 0x90:
 534             ret = do_syscall (env, env->gregs[1],
 535                               env->regwptr[0], env->regwptr[1],
 536                               env->regwptr[2], env->regwptr[3],
 537                               env->regwptr[4], env->regwptr[5]);
 538             if ((unsigned int)ret >= (unsigned int)(-515)) {
 539                 env->psr |= PSR_CARRY;
 540                 ret = -ret;
 541             } else {
 542                 env->psr &= ~PSR_CARRY;
 543             }
 544             env->regwptr[0] = ret;
 545             /* next instruction */
 546             env->pc = env->npc;
 547             env->npc = env->npc + 4;
 548             break;
 549         case 0x83: /* flush windows */
 550             flush_windows(env);
 551             /* next instruction */
 552             env->pc = env->npc;
 553             env->npc = env->npc + 4;
 554             break;
 555 #ifndef TARGET_SPARC64
 556         case TT_WIN_OVF: /* window overflow */
 557             save_window(env);
 558             break;
 559         case TT_WIN_UNF: /* window underflow */
 560             restore_window(env);
 561             break;
 562         case TT_TFAULT:
 563         case TT_DFAULT:
 564             {
 565                 info.si_signo = SIGSEGV;
 566                 info.si_errno = 0;
 567                 /* XXX: check env->error_code */
 568                 info.si_code = TARGET_SEGV_MAPERR;
 569                 info._sifields._sigfault._addr = env->mmuregs[4];
 570                 queue_signal(info.si_signo, &info);
 571             }
 572             break;
 573 #else
 574             // XXX
 575 #endif
 576         case 0x100: // XXX, why do we get these?
 577             break;
 578         case EXCP_DEBUG:
 579             {
 580                 int sig;
 581
 582                 sig = gdb_handlesig (env, TARGET_SIGTRAP);
 583                 if (sig)
 584                   {
 585                     info.si_signo = sig;
 586                     info.si_errno = 0;
 587                     info.si_code = TARGET_TRAP_BRKPT;
 588                     queue_signal(info.si_signo, &info);
 589                   }
 590             }
 591             break;
 592         default:
 593             printf ("Unhandled trap: 0x%x\n", trapnr);
 594             cpu_dump_state(env, stderr, fprintf, 0);
 595             exit (1);
 596         }
 597         process_pending_signals (env);
 598     }
 599 }
 600
 601 #endif
 602
 603 #ifdef TARGET_PPC
 604
 605 static inline uint64_t cpu_ppc_get_tb (CPUState *env)
 606 {
 607     /* TO FIX */
 608     return 0;
 609 }
 610
 611 uint32_t cpu_ppc_load_tbl (CPUState *env)
 612 {
 613     return cpu_ppc_get_tb(env) & 0xFFFFFFFF;
 614 }
 615
 616 uint32_t cpu_ppc_load_tbu (CPUState *env)
 617 {
 618     return cpu_ppc_get_tb(env) >> 32;
 619 }
 620
 621 static void cpu_ppc_store_tb (CPUState *env, uint64_t value)
 622 {
 623     /* TO FIX */
 624 }
 625
 626 void cpu_ppc_store_tbu (CPUState *env, uint32_t value)
 627 {
 628     cpu_ppc_store_tb(env, ((uint64_t)value << 32) | cpu_ppc_load_tbl(env));
 629 }
 630
 631 void cpu_ppc_store_tbl (CPUState *env, uint32_t value)
 632 {
 633     cpu_ppc_store_tb(env, ((uint64_t)cpu_ppc_load_tbl(env) << 32) | value);
 634 }
 635
 636 uint32_t cpu_ppc_load_decr (CPUState *env)
 637 {
 638     /* TO FIX */
 639     return -1;
 640 }
 641
 642 void cpu_ppc_store_decr (CPUState *env, uint32_t value)
 643 {
 644     /* TO FIX */
 645 }
 646
 647 void cpu_loop(CPUPPCState *env)
 648 {
 649     target_siginfo_t info;
 650     int trapnr;
 651     uint32_t ret;
 652
 653     for(;;) {
 654         trapnr = cpu_ppc_exec(env);
 655         if (trapnr != EXCP_SYSCALL_USER && trapnr != EXCP_BRANCH &&
 656             trapnr != EXCP_TRACE) {
 657             if (loglevel > 0) {
 658                 cpu_dump_state(env, logfile, fprintf, 0);
 659             }
 660         }
 661         switch(trapnr) {
 662         case EXCP_NONE:
 663             break;
 664         case EXCP_SYSCALL_USER:
 665             /* system call */
 666             /* WARNING:
 667              * PPC ABI uses overflow flag in cr0 to signal an error
 668              * in syscalls.
 669              */
 670 #if 0
 671             printf("syscall %d 0x%08x 0x%08x 0x%08x 0x%08x\n", env->gpr[0],
 672                    env->gpr[3], env->gpr[4], env->gpr[5], env->gpr[6]);
 673 #endif
 674             env->crf[0] &= ~0x1;
 675             ret = do_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4],
 676                              env->gpr[5], env->gpr[6], env->gpr[7],
 677                              env->gpr[8]);
 678             if (ret > (uint32_t)(-515)) {
 679                 env->crf[0] |= 0x1;
 680                 ret = -ret;
 681             }
 682             env->gpr[3] = ret;
 683 #if 0
 684             printf("syscall returned 0x%08x (%d)\n", ret, ret);
 685 #endif
 686             break;
 687         case EXCP_RESET:
 688             /* Should not happen ! */
 689             fprintf(stderr, "RESET asked... Stop emulation\n");
 690             if (loglevel)
 691                 fprintf(logfile, "RESET asked... Stop emulation\n");
 692             abort();
 693         case EXCP_MACHINE_CHECK:
 694             fprintf(stderr, "Machine check exeption...  Stop emulation\n");
 695             if (loglevel)
 696                 fprintf(logfile, "RESET asked... Stop emulation\n");
 697             info.si_signo = TARGET_SIGBUS;
 698             info.si_errno = 0;
 699             info.si_code = TARGET_BUS_OBJERR;
 700             info._sifields._sigfault._addr = env->nip - 4;
 701             queue_signal(info.si_signo, &info);
 702         case EXCP_DSI:
 703             fprintf(stderr, "Invalid data memory access: 0x%08x\n", env->spr[DAR]);
 704             if (loglevel) {
 705                 fprintf(logfile, "Invalid data memory access: 0x%08x\n",
 706                         env->spr[DAR]);
 707             }
 708             switch (env->error_code & 0xF) {
 709             case EXCP_DSI_TRANSLATE:
 710                 info.si_signo = TARGET_SIGSEGV;
 711                 info.si_errno = 0;
 712                 info.si_code = TARGET_SEGV_MAPERR;
 713                 break;
 714             case EXCP_DSI_NOTSUP:
 715             case EXCP_DSI_EXTERNAL:
 716                 info.si_signo = TARGET_SIGILL;
 717                 info.si_errno = 0;
 718                 info.si_code = TARGET_ILL_ILLADR;
 719                 break;
 720             case EXCP_DSI_PROT:
 721                 info.si_signo = TARGET_SIGSEGV;
 722                 info.si_errno = 0;
 723                 info.si_code = TARGET_SEGV_ACCERR;
 724                 break;
 725             case EXCP_DSI_DABR:
 726                 info.si_signo = TARGET_SIGTRAP;
 727                 info.si_errno = 0;
 728                 info.si_code = TARGET_TRAP_BRKPT;
 729                 break;
 730             default:
 731                 /* Let's send a regular segfault... */
 732                 fprintf(stderr, "Invalid segfault errno (%02x)\n",
 733                         env->error_code);
 734                 if (loglevel) {
 735                     fprintf(logfile, "Invalid segfault errno (%02x)\n",
 736                             env->error_code);
 737                 }
 738                 info.si_signo = TARGET_SIGSEGV;
 739                 info.si_errno = 0;
 740                 info.si_code = TARGET_SEGV_MAPERR;
 741                 break;
 742             }
 743             info._sifields._sigfault._addr = env->nip;
 744             queue_signal(info.si_signo, &info);
 745             break;
 746         case EXCP_ISI:
 747             fprintf(stderr, "Invalid instruction fetch\n");
 748             if (loglevel)
 749                 fprintf(logfile, "Invalid instruction fetch\n");
 750             switch (env->error_code) {
 751             case EXCP_ISI_TRANSLATE:
 752                 info.si_signo = TARGET_SIGSEGV;
 753             info.si_errno = 0;
 754                 info.si_code = TARGET_SEGV_MAPERR;
 755                 break;
 756             case EXCP_ISI_GUARD:
 757                 info.si_signo = TARGET_SIGILL;
 758                 info.si_errno = 0;
 759                 info.si_code = TARGET_ILL_ILLADR;
 760                 break;
 761             case EXCP_ISI_NOEXEC:
 762             case EXCP_ISI_PROT:
 763                 info.si_signo = TARGET_SIGSEGV;
 764                 info.si_errno = 0;
 765                 info.si_code = TARGET_SEGV_ACCERR;
 766                 break;
 767             default:
 768                 /* Let's send a regular segfault... */
 769                 fprintf(stderr, "Invalid segfault errno (%02x)\n",
 770                         env->error_code);
 771                 if (loglevel) {
 772                     fprintf(logfile, "Invalid segfault errno (%02x)\n",
 773                             env->error_code);
 774                 }
 775                 info.si_signo = TARGET_SIGSEGV;
 776                 info.si_errno = 0;
 777                 info.si_code = TARGET_SEGV_MAPERR;
 778                 break;
 779             }
 780             info._sifields._sigfault._addr = env->nip - 4;
 781             queue_signal(info.si_signo, &info);
 782             break;
 783         case EXCP_EXTERNAL:
 784             /* Should not happen ! */
 785             fprintf(stderr, "External interruption... Stop emulation\n");
 786             if (loglevel)
 787                 fprintf(logfile, "External interruption... Stop emulation\n");
 788             abort();
 789         case EXCP_ALIGN:
 790             fprintf(stderr, "Invalid unaligned memory access\n");
 791             if (loglevel)
 792                 fprintf(logfile, "Invalid unaligned memory access\n");
 793             info.si_signo = TARGET_SIGBUS;
 794             info.si_errno = 0;
 795             info.si_code = TARGET_BUS_ADRALN;
 796             info._sifields._sigfault._addr = env->nip - 4;
 797             queue_signal(info.si_signo, &info);
 798             break;
 799         case EXCP_PROGRAM:
 800             switch (env->error_code & ~0xF) {
 801             case EXCP_FP:
 802             fprintf(stderr, "Program exception\n");
 803                 if (loglevel)
 804                     fprintf(logfile, "Program exception\n");
 805                 /* Set FX */
 806                 env->fpscr[7] |= 0x8;
 807                 /* Finally, update FEX */
 808                 if ((((env->fpscr[7] & 0x3) << 3) | (env->fpscr[6] >> 1)) &
 809                     ((env->fpscr[1] << 1) | (env->fpscr[0] >> 3)))
 810                     env->fpscr[7] |= 0x4;
 811                 info.si_signo = TARGET_SIGFPE;
 812                 info.si_errno = 0;
 813                 switch (env->error_code & 0xF) {
 814                 case EXCP_FP_OX:
 815                     info.si_code = TARGET_FPE_FLTOVF;
 816                     break;
 817                 case EXCP_FP_UX:
 818                     info.si_code = TARGET_FPE_FLTUND;
 819                     break;
 820                 case EXCP_FP_ZX:
 821                 case EXCP_FP_VXZDZ:
 822                     info.si_code = TARGET_FPE_FLTDIV;
 823                     break;
 824                 case EXCP_FP_XX:
 825                     info.si_code = TARGET_FPE_FLTRES;
 826                     break;
 827                 case EXCP_FP_VXSOFT:
 828                     info.si_code = TARGET_FPE_FLTINV;
 829                     break;
 830                 case EXCP_FP_VXNAN:
 831                 case EXCP_FP_VXISI:
 832                 case EXCP_FP_VXIDI:
 833                 case EXCP_FP_VXIMZ:
 834                 case EXCP_FP_VXVC:
 835                 case EXCP_FP_VXSQRT:
 836                 case EXCP_FP_VXCVI:
 837                     info.si_code = TARGET_FPE_FLTSUB;
 838                     break;
 839                 default:
 840                     fprintf(stderr, "Unknown floating point exception "
 841                             "(%02x)\n", env->error_code);
 842                     if (loglevel) {
 843                         fprintf(logfile, "Unknown floating point exception "
 844                                 "(%02x)\n", env->error_code & 0xF);
 845                     }
 846                 }
 847             break;
 848         case EXCP_INVAL:
 849                 fprintf(stderr, "Invalid instruction\n");
 850                 if (loglevel)
 851                     fprintf(logfile, "Invalid instruction\n");
 852                 info.si_signo = TARGET_SIGILL;
 853                 info.si_errno = 0;
 854                 switch (env->error_code & 0xF) {
 855                 case EXCP_INVAL_INVAL:
 856                     info.si_code = TARGET_ILL_ILLOPC;
 857                     break;
 858                 case EXCP_INVAL_LSWX:
 859             info.si_code = TARGET_ILL_ILLOPN;
 860                     break;
 861                 case EXCP_INVAL_SPR:
 862                     info.si_code = TARGET_ILL_PRVREG;
 863                     break;
 864                 case EXCP_INVAL_FP:
 865                     info.si_code = TARGET_ILL_COPROC;
 866                     break;
 867                 default:
 868                     fprintf(stderr, "Unknown invalid operation (%02x)\n",
 869                             env->error_code & 0xF);
 870                     if (loglevel) {
 871                         fprintf(logfile, "Unknown invalid operation (%02x)\n",
 872                                 env->error_code & 0xF);
 873                     }
 874                     info.si_code = TARGET_ILL_ILLADR;
 875                     break;
 876                 }
 877                 break;
 878             case EXCP_PRIV:
 879                 fprintf(stderr, "Privilege violation\n");
 880                 if (loglevel)
 881                     fprintf(logfile, "Privilege violation\n");
 882                 info.si_signo = TARGET_SIGILL;
 883                 info.si_errno = 0;
 884                 switch (env->error_code & 0xF) {
 885                 case EXCP_PRIV_OPC:
 886                     info.si_code = TARGET_ILL_PRVOPC;
 887                     break;
 888                 case EXCP_PRIV_REG:
 889                     info.si_code = TARGET_ILL_PRVREG;
 890                 break;
 891                 default:
 892                     fprintf(stderr, "Unknown privilege violation (%02x)\n",
 893                             env->error_code & 0xF);
 894                     info.si_code = TARGET_ILL_PRVOPC;
 895                     break;
 896                 }
 897                 break;
 898             case EXCP_TRAP:
 899                 fprintf(stderr, "Tried to call a TRAP\n");
 900                 if (loglevel)
 901                     fprintf(logfile, "Tried to call a TRAP\n");
 902                 abort();
 903             default:
 904                 /* Should not happen ! */
 905                 fprintf(stderr, "Unknown program exception (%02x)\n",
 906                         env->error_code);
 907                 if (loglevel) {
 908                     fprintf(logfile, "Unknwon program exception (%02x)\n",
 909                             env->error_code);
 910                 }
 911                 abort();
 912             }
 913             info._sifields._sigfault._addr = env->nip - 4;
 914             queue_signal(info.si_signo, &info);
 915             break;
 916         case EXCP_NO_FP:
 917             fprintf(stderr, "No floating point allowed\n");
 918             if (loglevel)
 919                 fprintf(logfile, "No floating point allowed\n");
 920             info.si_signo = TARGET_SIGILL;
 921             info.si_errno = 0;
 922             info.si_code = TARGET_ILL_COPROC;
 923             info._sifields._sigfault._addr = env->nip - 4;
 924             queue_signal(info.si_signo, &info);
 925             break;
 926         case EXCP_DECR:
 927             /* Should not happen ! */
 928             fprintf(stderr, "Decrementer exception\n");
 929             if (loglevel)
 930                 fprintf(logfile, "Decrementer exception\n");
 931             abort();
 932         case EXCP_RESA: /* Implementation specific          */
 933             /* Should not happen ! */
 934             fprintf(stderr, "RESA exception should never happen !\n");
 935             if (loglevel)
 936                 fprintf(logfile, "RESA exception should never happen !\n");
 937             abort();
 938         case EXCP_RESB: /* Implementation specific          */
 939             /* Should not happen ! */
 940             fprintf(stderr, "RESB exception should never happen !\n");
 941             if (loglevel)
 942                 fprintf(logfile, "RESB exception should never happen !\n");
 943             abort();
 944         case EXCP_TRACE:
 945             /* Do nothing: we use this to trace execution */
 946             break;
 947         case EXCP_FP_ASSIST:
 948             /* Should not happen ! */
 949             fprintf(stderr, "Floating point assist exception\n");
 950             if (loglevel)
 951                 fprintf(logfile, "Floating point assist exception\n");
 952             abort();
 953         case EXCP_MTMSR:
 954             /* We reloaded the msr, just go on */
 955             if (msr_pr == 0) {
 956                 fprintf(stderr, "Tried to go into supervisor mode !\n");
 957                 if (loglevel)
 958                     fprintf(logfile, "Tried to go into supervisor mode !\n");
 959                 abort();
 960         }
 961             break;
 962         case EXCP_BRANCH:
 963             /* We stopped because of a jump... */
 964             break;
 965         case EXCP_RFI:
 966             /* Should not occur: we always are in user mode */
 967             fprintf(stderr, "Return from interrupt ?\n");
 968             if (loglevel)
 969                 fprintf(logfile, "Return from interrupt ?\n");
 970             abort();
 971         case EXCP_INTERRUPT:
 972             /* Don't know why this should ever happen... */
 973             break;
 974         case EXCP_DEBUG:
 975             {
 976                 int sig;
 977
 978                 sig = gdb_handlesig (env, TARGET_SIGTRAP);
 979                 if (sig)
 980                   {
 981                     info.si_signo = sig;
 982                     info.si_errno = 0;
 983                     info.si_code = TARGET_TRAP_BRKPT;
 984                     queue_signal(info.si_signo, &info);
 985                   }
 986             }
 987             break;
 988         default:
 989             fprintf(stderr, "qemu: unhandled CPU exception 0x%x - aborting\n",
 990                     trapnr);
 991             if (loglevel) {
 992                 fprintf(logfile, "qemu: unhandled CPU exception 0x%02x - "
 993                         "0x%02x - aborting\n", trapnr, env->error_code);
 994             }
 995             abort();
 996         }
 997         process_pending_signals(env);
 998     }
 999 }
1000 #endif
1001
1002 void usage(void)
1003 {
1004     printf("qemu-" TARGET_ARCH " version " QEMU_VERSION ", Copyright (c) 2003-2004 Fabrice Bellard\n"
1005            "usage: qemu-" TARGET_ARCH " [-h] [-g] [-d opts] [-L path] [-s size] program [arguments...]\n"
1006            "Linux CPU emulator (compiled for %s emulation)\n"
1007            "\n"
1008            "-h           print this help\n"
1009            "-g           wait gdb connection to port %d\n"
1010            "-L path      set the elf interpreter prefix (default=%s)\n"
1011            "-s size      set the stack size in bytes (default=%ld)\n"
1012            "\n"
1013            "debug options:\n"
1014 #ifdef USE_CODE_COPY
1015            "-no-code-copy   disable code copy acceleration\n"
1016 #endif
1017            "-d options   activate log (logfile=%s)\n"
1018            "-p pagesize  set the host page size to 'pagesize'\n",
1019            TARGET_ARCH,
1020            DEFAULT_GDBSTUB_PORT,
1021            interp_prefix,
1022            x86_stack_size,
1023            DEBUG_LOGFILE);
1024     _exit(1);
1025 }
1026
1027 /* XXX: currently only used for async signals (see signal.c) */
1028 CPUState *global_env;
1029 /* used only if single thread */
1030 CPUState *cpu_single_env = NULL;
1031
1032 /* used to free thread contexts */
1033 TaskState *first_task_state;
1034
1035 int main(int argc, char **argv)
1036 {
1037     const char *filename;
1038     struct target_pt_regs regs1, *regs = &regs1;
1039     struct image_info info1, *info = &info1;
1040     TaskState ts1, *ts = &ts1;
1041     CPUState *env;
1042     int optind;
1043     const char *r;
1044     int use_gdbstub = 0;
1045
1046     if (argc <= 1)
1047         usage();
1048
1049     /* init debug */
1050     cpu_set_log_filename(DEBUG_LOGFILE);
1051
1052     optind = 1;
1053     for(;;) {
1054         if (optind >= argc)
1055             break;
1056         r = argv[optind];
1057         if (r[0] != '-')
1058             break;
1059         optind++;
1060         r++;
1061         if (!strcmp(r, "-")) {
1062             break;
1063         } else if (!strcmp(r, "d")) {
1064             int mask;
1065             CPULogItem *item;
1066
1067             if (optind >= argc)
1068                 break;
1069
1070             r = argv[optind++];
1071             mask = cpu_str_to_log_mask(r);
1072             if (!mask) {
1073                 printf("Log items (comma separated):\n");
1074                 for(item = cpu_log_items; item->mask != 0; item++) {
1075                     printf("%-10s %s\n", item->name, item->help);
1076                 }
1077                 exit(1);
1078             }
1079             cpu_set_log(mask);
1080         } else if (!strcmp(r, "s")) {
1081             r = argv[optind++];
1082             x86_stack_size = strtol(r, (char **)&r, 0);
1083             if (x86_stack_size <= 0)
1084                 usage();
1085             if (*r == 'M')
1086                 x86_stack_size *= 1024 * 1024;
1087             else if (*r == 'k' || *r == 'K')
1088                 x86_stack_size *= 1024;
1089         } else if (!strcmp(r, "L")) {
1090             interp_prefix = argv[optind++];
1091         } else if (!strcmp(r, "p")) {
1092             qemu_host_page_size = atoi(argv[optind++]);
1093             if (qemu_host_page_size == 0 ||
1094                 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
1095                 fprintf(stderr, "page size must be a power of two\n");
1096                 exit(1);
1097             }
1098         } else if (!strcmp(r, "g")) {
1099             use_gdbstub = 1;
1100         } else
1101 #ifdef USE_CODE_COPY
1102         if (!strcmp(r, "no-code-copy")) {
1103             code_copy_enabled = 0;
1104         } else
1105 #endif
1106         {
1107             usage();
1108         }
1109     }
1110     if (optind >= argc)
1111         usage();
1112     filename = argv[optind];
1113
1114     /* Zero out regs */
1115     memset(regs, 0, sizeof(struct target_pt_regs));
1116
1117     /* Zero out image_info */
1118     memset(info, 0, sizeof(struct image_info));
1119
1120     /* Scan interp_prefix dir for replacement files. */
1121     init_paths(interp_prefix);
1122
1123     /* NOTE: we need to init the CPU at this stage to get
1124        qemu_host_page_size */
1125     env = cpu_init();
1126
1127     if (elf_exec(filename, argv+optind, environ, regs, info) != 0) {
1128         printf("Error loading %s\n", filename);
1129         _exit(1);
1130     }
1131
1132     if (loglevel) {
1133         page_dump(logfile);
1134
1135         fprintf(logfile, "start_brk   0x%08lx\n" , info->start_brk);
1136         fprintf(logfile, "end_code    0x%08lx\n" , info->end_code);
1137         fprintf(logfile, "start_code  0x%08lx\n" , info->start_code);
1138         fprintf(logfile, "end_data    0x%08lx\n" , info->end_data);
1139         fprintf(logfile, "start_stack 0x%08lx\n" , info->start_stack);
1140         fprintf(logfile, "brk         0x%08lx\n" , info->brk);
1141         fprintf(logfile, "entry       0x%08lx\n" , info->entry);
1142     }
1143
1144     target_set_brk((char *)info->brk);
1145     syscall_init();
1146     signal_init();
1147
1148     global_env = env;
1149
1150     /* build Task State */
1151     memset(ts, 0, sizeof(TaskState));
1152     env->opaque = ts;
1153     ts->used = 1;
1154     env->user_mode_only = 1;
1155
1156 #if defined(TARGET_I386)
1157     cpu_x86_set_cpl(env, 3);
1158
1159     env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
1160     env->hflags |= HF_PE_MASK;
1161     if (env->cpuid_features & CPUID_SSE) {
1162         env->cr[4] |= CR4_OSFXSR_MASK;
1163         env->hflags |= HF_OSFXSR_MASK;
1164     }
1165
1166     /* flags setup : we activate the IRQs by default as in user mode */
1167     env->eflags |= IF_MASK;
1168
1169     /* linux register setup */
1170     env->regs[R_EAX] = regs->eax;
1171     env->regs[R_EBX] = regs->ebx;
1172     env->regs[R_ECX] = regs->ecx;
1173     env->regs[R_EDX] = regs->edx;
1174     env->regs[R_ESI] = regs->esi;
1175     env->regs[R_EDI] = regs->edi;
1176     env->regs[R_EBP] = regs->ebp;
1177     env->regs[R_ESP] = regs->esp;
1178     env->eip = regs->eip;
1179
1180     /* linux interrupt setup */
1181     env->idt.base = (long)idt_table;
1182     env->idt.limit = sizeof(idt_table) - 1;
1183     set_idt(0, 0);
1184     set_idt(1, 0);
1185     set_idt(2, 0);
1186     set_idt(3, 3);
1187     set_idt(4, 3);
1188     set_idt(5, 3);
1189     set_idt(6, 0);
1190     set_idt(7, 0);
1191     set_idt(8, 0);
1192     set_idt(9, 0);
1193     set_idt(10, 0);
1194     set_idt(11, 0);
1195     set_idt(12, 0);
1196     set_idt(13, 0);
1197     set_idt(14, 0);
1198     set_idt(15, 0);
1199     set_idt(16, 0);
1200     set_idt(17, 0);
1201     set_idt(18, 0);
1202     set_idt(19, 0);
1203     set_idt(0x80, 3);
1204
1205     /* linux segment setup */
1206     env->gdt.base = (long)gdt_table;
1207     env->gdt.limit = sizeof(gdt_table) - 1;
1208     write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1209              DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1210              (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1211     write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff,
1212              DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1213              (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
1214     cpu_x86_load_seg(env, R_CS, __USER_CS);
1215     cpu_x86_load_seg(env, R_DS, __USER_DS);
1216     cpu_x86_load_seg(env, R_ES, __USER_DS);
1217     cpu_x86_load_seg(env, R_SS, __USER_DS);
1218     cpu_x86_load_seg(env, R_FS, __USER_DS);
1219     cpu_x86_load_seg(env, R_GS, __USER_DS);
1220
1221 #elif defined(TARGET_ARM)
1222     {
1223         int i;
1224         for(i = 0; i < 16; i++) {
1225             env->regs[i] = regs->uregs[i];
1226         }
1227         env->cpsr = regs->uregs[16];
1228         ts->stack_base = info->start_stack;
1229         ts->heap_base = info->brk;
1230         /* This will be filled in on the first SYS_HEAPINFO call.  */
1231         ts->heap_limit = 0;
1232     }
1233 #elif defined(TARGET_SPARC)
1234     {
1235         int i;
1236         env->pc = regs->pc;
1237         env->npc = regs->npc;
1238         env->y = regs->y;
1239         for(i = 0; i < 8; i++)
1240             env->gregs[i] = regs->u_regs[i];
1241         for(i = 0; i < 8; i++)
1242             env->regwptr[i] = regs->u_regs[i + 8];
1243     }
1244 #elif defined(TARGET_PPC)
1245     {
1246         int i;
1247         for (i = 0; i < 32; i++) {
1248             if (i != 12 && i != 6 && i != 13)
1249                 env->msr[i] = (regs->msr >> i) & 1;
1250         }
1251         env->nip = regs->nip;
1252         for(i = 0; i < 32; i++) {
1253             env->gpr[i] = regs->gpr[i];
1254         }
1255     }
1256 #else
1257 #error unsupported target CPU
1258 #endif
1259
1260     if (use_gdbstub) {
1261         gdbserver_start (DEFAULT_GDBSTUB_PORT);
1262         gdb_handlesig(env, 0);
1263     }
1264     cpu_loop(env);
1265     /* never exits */
1266     return 0;
1267 }