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                 insn = ldl((void *)(env->regs[15] - 4));
 363                 n = insn & 0xffffff;
 364                 if (n == ARM_NR_cacheflush) {
 365                     arm_cache_flush(env->regs[0], env->regs[1]);
 366                 } else if (n == ARM_NR_semihosting
 367                            || n == ARM_NR_thumb_semihosting) {
 368                     env->regs[0] = do_arm_semihosting (env);
 369                 } else if (n >= ARM_SYSCALL_BASE) {
 370                     /* linux syscall */
 371                     n -= ARM_SYSCALL_BASE;
 372                     env->regs[0] = do_syscall(env,
 373                                               n,
 374                                               env->regs[0],
 375                                               env->regs[1],
 376                                               env->regs[2],
 377                                               env->regs[3],
 378                                               env->regs[4],
 379                                               env->regs[5]);
 380                 } else {
 381                     goto error;
 382                 }
 383             }
 384             break;
 385         case EXCP_INTERRUPT:
 386             /* just indicate that signals should be handled asap */
 387             break;
 388         case EXCP_PREFETCH_ABORT:
 389         case EXCP_DATA_ABORT:
 390             {
 391                 info.si_signo = SIGSEGV;
 392                 info.si_errno = 0;
 393                 /* XXX: check env->error_code */
 394                 info.si_code = TARGET_SEGV_MAPERR;
 395                 info._sifields._sigfault._addr = env->cp15_6;
 396                 queue_signal(info.si_signo, &info);
 397             }
 398             break;
 399         case EXCP_DEBUG:
 400             {
 401                 int sig;
 402
 403                 sig = gdb_handlesig (env, TARGET_SIGTRAP);
 404                 if (sig)
 405                   {
 406                     info.si_signo = sig;
 407                     info.si_errno = 0;
 408                     info.si_code = TARGET_TRAP_BRKPT;
 409                     queue_signal(info.si_signo, &info);
 410                   }
 411             }
 412             break;
 413         default:
 414         error:
 415             fprintf(stderr, "qemu: unhandled CPU exception 0x%x - aborting\n",
 416                     trapnr);
 417             cpu_dump_state(env, stderr, fprintf, 0);
 418             abort();
 419         }
 420         process_pending_signals(env);
 421     }
 422 }
 423
 424 #endif
 425
 426 #ifdef TARGET_SPARC
 427
 428 //#define DEBUG_WIN
 429
 430 /* WARNING: dealing with register windows _is_ complicated. More info
 431    can be found at http://www.sics.se/~psm/sparcstack.html */
 432 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index)
 433 {
 434     index = (index + cwp * 16) & (16 * NWINDOWS - 1);
 435     /* wrap handling : if cwp is on the last window, then we use the
 436        registers 'after' the end */
 437     if (index < 8 && env->cwp == (NWINDOWS - 1))
 438         index += (16 * NWINDOWS);
 439     return index;
 440 }
 441
 442 /* save the register window 'cwp1' */
 443 static inline void save_window_offset(CPUSPARCState *env, int cwp1)
 444 {
 445     unsigned int i;
 446     uint32_t *sp_ptr;
 447
 448     sp_ptr = (uint32_t *)(env->regbase[get_reg_index(env, cwp1, 6)]);
 449 #if defined(DEBUG_WIN)
 450     printf("win_overflow: sp_ptr=0x%x save_cwp=%d\n",
 451            (int)sp_ptr, cwp1);
 452 #endif
 453     for(i = 0; i < 16; i++) {
 454         put_user(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
 455         sp_ptr++;
 456     }
 457 }
 458
 459 static void save_window(CPUSPARCState *env)
 460 {
 461     unsigned int new_wim;
 462     new_wim = ((env->wim >> 1) | (env->wim << (NWINDOWS - 1))) &
 463         ((1LL << NWINDOWS) - 1);
 464     save_window_offset(env, (env->cwp - 2) & (NWINDOWS - 1));
 465     env->wim = new_wim;
 466 }
 467
 468 static void restore_window(CPUSPARCState *env)
 469 {
 470     unsigned int new_wim, i, cwp1;
 471     uint32_t *sp_ptr, reg;
 472
 473     new_wim = ((env->wim << 1) | (env->wim >> (NWINDOWS - 1))) &
 474         ((1LL << NWINDOWS) - 1);
 475
 476     /* restore the invalid window */
 477     cwp1 = (env->cwp + 1) & (NWINDOWS - 1);
 478     sp_ptr = (uint32_t *)(env->regbase[get_reg_index(env, cwp1, 6)]);
 479 #if defined(DEBUG_WIN)
 480     printf("win_underflow: sp_ptr=0x%x load_cwp=%d\n",
 481            (int)sp_ptr, cwp1);
 482 #endif
 483     for(i = 0; i < 16; i++) {
 484         get_user(reg, sp_ptr);
 485         env->regbase[get_reg_index(env, cwp1, 8 + i)] = reg;
 486         sp_ptr++;
 487     }
 488     env->wim = new_wim;
 489 }
 490
 491 static void flush_windows(CPUSPARCState *env)
 492 {
 493     int offset, cwp1;
 494
 495     offset = 1;
 496     for(;;) {
 497         /* if restore would invoke restore_window(), then we can stop */
 498         cwp1 = (env->cwp + offset) & (NWINDOWS - 1);
 499         if (env->wim & (1 << cwp1))
 500             break;
 501         save_window_offset(env, cwp1);
 502         offset++;
 503     }
 504     /* set wim so that restore will reload the registers */
 505     cwp1 = (env->cwp + 1) & (NWINDOWS - 1);
 506     env->wim = 1 << cwp1;
 507 #if defined(DEBUG_WIN)
 508     printf("flush_windows: nb=%d\n", offset - 1);
 509 #endif
 510 }
 511
 512 void cpu_loop (CPUSPARCState *env)
 513 {
 514     int trapnr, ret;
 515     target_siginfo_t info;
 516
 517     while (1) {
 518         trapnr = cpu_sparc_exec (env);
 519
 520         switch (trapnr) {
 521         case 0x88:
 522         case 0x90:
 523             ret = do_syscall (env, env->gregs[1],
 524                               env->regwptr[0], env->regwptr[1],
 525                               env->regwptr[2], env->regwptr[3],
 526                               env->regwptr[4], env->regwptr[5]);
 527             if ((unsigned int)ret >= (unsigned int)(-515)) {
 528                 env->psr |= PSR_CARRY;
 529                 ret = -ret;
 530             } else {
 531                 env->psr &= ~PSR_CARRY;
 532             }
 533             env->regwptr[0] = ret;
 534             /* next instruction */
 535             env->pc = env->npc;
 536             env->npc = env->npc + 4;
 537             break;
 538         case 0x83: /* flush windows */
 539             flush_windows(env);
 540             /* next instruction */
 541             env->pc = env->npc;
 542             env->npc = env->npc + 4;
 543             break;
 544         case TT_WIN_OVF: /* window overflow */
 545             save_window(env);
 546             break;
 547         case TT_WIN_UNF: /* window underflow */
 548             restore_window(env);
 549             break;
 550         case TT_TFAULT:
 551         case TT_DFAULT:
 552             {
 553                 info.si_signo = SIGSEGV;
 554                 info.si_errno = 0;
 555                 /* XXX: check env->error_code */
 556                 info.si_code = TARGET_SEGV_MAPERR;
 557                 info._sifields._sigfault._addr = env->mmuregs[4];
 558                 queue_signal(info.si_signo, &info);
 559             }
 560             break;
 561         case 0x100: // XXX, why do we get these?
 562             break;
 563         case EXCP_DEBUG:
 564             {
 565                 int sig;
 566
 567                 sig = gdb_handlesig (env, TARGET_SIGTRAP);
 568                 if (sig)
 569                   {
 570                     info.si_signo = sig;
 571                     info.si_errno = 0;
 572                     info.si_code = TARGET_TRAP_BRKPT;
 573                     queue_signal(info.si_signo, &info);
 574                   }
 575             }
 576             break;
 577         default:
 578             printf ("Unhandled trap: 0x%x\n", trapnr);
 579             cpu_dump_state(env, stderr, fprintf, 0);
 580             exit (1);
 581         }
 582         process_pending_signals (env);
 583     }
 584 }
 585
 586 #endif
 587
 588 #ifdef TARGET_PPC
 589
 590 static inline uint64_t cpu_ppc_get_tb (CPUState *env)
 591 {
 592     /* TO FIX */
 593     return 0;
 594 }
 595
 596 uint32_t cpu_ppc_load_tbl (CPUState *env)
 597 {
 598     return cpu_ppc_get_tb(env) & 0xFFFFFFFF;
 599 }
 600
 601 uint32_t cpu_ppc_load_tbu (CPUState *env)
 602 {
 603     return cpu_ppc_get_tb(env) >> 32;
 604 }
 605
 606 static void cpu_ppc_store_tb (CPUState *env, uint64_t value)
 607 {
 608     /* TO FIX */
 609 }
 610
 611 void cpu_ppc_store_tbu (CPUState *env, uint32_t value)
 612 {
 613     cpu_ppc_store_tb(env, ((uint64_t)value << 32) | cpu_ppc_load_tbl(env));
 614 }
 615
 616 void cpu_ppc_store_tbl (CPUState *env, uint32_t value)
 617 {
 618     cpu_ppc_store_tb(env, ((uint64_t)cpu_ppc_load_tbl(env) << 32) | value);
 619 }
 620
 621 uint32_t cpu_ppc_load_decr (CPUState *env)
 622 {
 623     /* TO FIX */
 624     return -1;
 625 }
 626
 627 void cpu_ppc_store_decr (CPUState *env, uint32_t value)
 628 {
 629     /* TO FIX */
 630 }
 631
 632 void cpu_loop(CPUPPCState *env)
 633 {
 634     target_siginfo_t info;
 635     int trapnr;
 636     uint32_t ret;
 637
 638     for(;;) {
 639         trapnr = cpu_ppc_exec(env);
 640         if (trapnr != EXCP_SYSCALL_USER && trapnr != EXCP_BRANCH &&
 641             trapnr != EXCP_TRACE) {
 642             if (loglevel > 0) {
 643                 cpu_dump_state(env, logfile, fprintf, 0);
 644             }
 645         }
 646         switch(trapnr) {
 647         case EXCP_NONE:
 648             break;
 649         case EXCP_SYSCALL_USER:
 650             /* system call */
 651             /* WARNING:
 652              * PPC ABI uses overflow flag in cr0 to signal an error
 653              * in syscalls.
 654              */
 655 #if 0
 656             printf("syscall %d 0x%08x 0x%08x 0x%08x 0x%08x\n", env->gpr[0],
 657                    env->gpr[3], env->gpr[4], env->gpr[5], env->gpr[6]);
 658 #endif
 659             env->crf[0] &= ~0x1;
 660             ret = do_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4],
 661                              env->gpr[5], env->gpr[6], env->gpr[7],
 662                              env->gpr[8]);
 663             if (ret > (uint32_t)(-515)) {
 664                 env->crf[0] |= 0x1;
 665                 ret = -ret;
 666             }
 667             env->gpr[3] = ret;
 668 #if 0
 669             printf("syscall returned 0x%08x (%d)\n", ret, ret);
 670 #endif
 671             break;
 672         case EXCP_RESET:
 673             /* Should not happen ! */
 674             fprintf(stderr, "RESET asked... Stop emulation\n");
 675             if (loglevel)
 676                 fprintf(logfile, "RESET asked... Stop emulation\n");
 677             abort();
 678         case EXCP_MACHINE_CHECK:
 679             fprintf(stderr, "Machine check exeption...  Stop emulation\n");
 680             if (loglevel)
 681                 fprintf(logfile, "RESET asked... Stop emulation\n");
 682             info.si_signo = TARGET_SIGBUS;
 683             info.si_errno = 0;
 684             info.si_code = TARGET_BUS_OBJERR;
 685             info._sifields._sigfault._addr = env->nip - 4;
 686             queue_signal(info.si_signo, &info);
 687         case EXCP_DSI:
 688             fprintf(stderr, "Invalid data memory access: 0x%08x\n", env->spr[DAR]);
 689             if (loglevel) {
 690                 fprintf(logfile, "Invalid data memory access: 0x%08x\n",
 691                         env->spr[DAR]);
 692             }
 693             switch (env->error_code & 0xF) {
 694             case EXCP_DSI_TRANSLATE:
 695                 info.si_signo = TARGET_SIGSEGV;
 696                 info.si_errno = 0;
 697                 info.si_code = TARGET_SEGV_MAPERR;
 698                 break;
 699             case EXCP_DSI_NOTSUP:
 700             case EXCP_DSI_EXTERNAL:
 701                 info.si_signo = TARGET_SIGILL;
 702                 info.si_errno = 0;
 703                 info.si_code = TARGET_ILL_ILLADR;
 704                 break;
 705             case EXCP_DSI_PROT:
 706                 info.si_signo = TARGET_SIGSEGV;
 707                 info.si_errno = 0;
 708                 info.si_code = TARGET_SEGV_ACCERR;
 709                 break;
 710             case EXCP_DSI_DABR:
 711                 info.si_signo = TARGET_SIGTRAP;
 712                 info.si_errno = 0;
 713                 info.si_code = TARGET_TRAP_BRKPT;
 714                 break;
 715             default:
 716                 /* Let's send a regular segfault... */
 717                 fprintf(stderr, "Invalid segfault errno (%02x)\n",
 718                         env->error_code);
 719                 if (loglevel) {
 720                     fprintf(logfile, "Invalid segfault errno (%02x)\n",
 721                             env->error_code);
 722                 }
 723                 info.si_signo = TARGET_SIGSEGV;
 724                 info.si_errno = 0;
 725                 info.si_code = TARGET_SEGV_MAPERR;
 726                 break;
 727             }
 728             info._sifields._sigfault._addr = env->nip;
 729             queue_signal(info.si_signo, &info);
 730             break;
 731         case EXCP_ISI:
 732             fprintf(stderr, "Invalid instruction fetch\n");
 733             if (loglevel)
 734                 fprintf(logfile, "Invalid instruction fetch\n");
 735             switch (env->error_code) {
 736             case EXCP_ISI_TRANSLATE:
 737                 info.si_signo = TARGET_SIGSEGV;
 738             info.si_errno = 0;
 739                 info.si_code = TARGET_SEGV_MAPERR;
 740                 break;
 741             case EXCP_ISI_GUARD:
 742                 info.si_signo = TARGET_SIGILL;
 743                 info.si_errno = 0;
 744                 info.si_code = TARGET_ILL_ILLADR;
 745                 break;
 746             case EXCP_ISI_NOEXEC:
 747             case EXCP_ISI_PROT:
 748                 info.si_signo = TARGET_SIGSEGV;
 749                 info.si_errno = 0;
 750                 info.si_code = TARGET_SEGV_ACCERR;
 751                 break;
 752             default:
 753                 /* Let's send a regular segfault... */
 754                 fprintf(stderr, "Invalid segfault errno (%02x)\n",
 755                         env->error_code);
 756                 if (loglevel) {
 757                     fprintf(logfile, "Invalid segfault errno (%02x)\n",
 758                             env->error_code);
 759                 }
 760                 info.si_signo = TARGET_SIGSEGV;
 761                 info.si_errno = 0;
 762                 info.si_code = TARGET_SEGV_MAPERR;
 763                 break;
 764             }
 765             info._sifields._sigfault._addr = env->nip - 4;
 766             queue_signal(info.si_signo, &info);
 767             break;
 768         case EXCP_EXTERNAL:
 769             /* Should not happen ! */
 770             fprintf(stderr, "External interruption... Stop emulation\n");
 771             if (loglevel)
 772                 fprintf(logfile, "External interruption... Stop emulation\n");
 773             abort();
 774         case EXCP_ALIGN:
 775             fprintf(stderr, "Invalid unaligned memory access\n");
 776             if (loglevel)
 777                 fprintf(logfile, "Invalid unaligned memory access\n");
 778             info.si_signo = TARGET_SIGBUS;
 779             info.si_errno = 0;
 780             info.si_code = TARGET_BUS_ADRALN;
 781             info._sifields._sigfault._addr = env->nip - 4;
 782             queue_signal(info.si_signo, &info);
 783             break;
 784         case EXCP_PROGRAM:
 785             switch (env->error_code & ~0xF) {
 786             case EXCP_FP:
 787             fprintf(stderr, "Program exception\n");
 788                 if (loglevel)
 789                     fprintf(logfile, "Program exception\n");
 790                 /* Set FX */
 791                 env->fpscr[7] |= 0x8;
 792                 /* Finally, update FEX */
 793                 if ((((env->fpscr[7] & 0x3) << 3) | (env->fpscr[6] >> 1)) &
 794                     ((env->fpscr[1] << 1) | (env->fpscr[0] >> 3)))
 795                     env->fpscr[7] |= 0x4;
 796                 info.si_signo = TARGET_SIGFPE;
 797                 info.si_errno = 0;
 798                 switch (env->error_code & 0xF) {
 799                 case EXCP_FP_OX:
 800                     info.si_code = TARGET_FPE_FLTOVF;
 801                     break;
 802                 case EXCP_FP_UX:
 803                     info.si_code = TARGET_FPE_FLTUND;
 804                     break;
 805                 case EXCP_FP_ZX:
 806                 case EXCP_FP_VXZDZ:
 807                     info.si_code = TARGET_FPE_FLTDIV;
 808                     break;
 809                 case EXCP_FP_XX:
 810                     info.si_code = TARGET_FPE_FLTRES;
 811                     break;
 812                 case EXCP_FP_VXSOFT:
 813                     info.si_code = TARGET_FPE_FLTINV;
 814                     break;
 815                 case EXCP_FP_VXNAN:
 816                 case EXCP_FP_VXISI:
 817                 case EXCP_FP_VXIDI:
 818                 case EXCP_FP_VXIMZ:
 819                 case EXCP_FP_VXVC:
 820                 case EXCP_FP_VXSQRT:
 821                 case EXCP_FP_VXCVI:
 822                     info.si_code = TARGET_FPE_FLTSUB;
 823                     break;
 824                 default:
 825                     fprintf(stderr, "Unknown floating point exception "
 826                             "(%02x)\n", env->error_code);
 827                     if (loglevel) {
 828                         fprintf(logfile, "Unknown floating point exception "
 829                                 "(%02x)\n", env->error_code & 0xF);
 830                     }
 831                 }
 832             break;
 833         case EXCP_INVAL:
 834                 fprintf(stderr, "Invalid instruction\n");
 835                 if (loglevel)
 836                     fprintf(logfile, "Invalid instruction\n");
 837                 info.si_signo = TARGET_SIGILL;
 838                 info.si_errno = 0;
 839                 switch (env->error_code & 0xF) {
 840                 case EXCP_INVAL_INVAL:
 841                     info.si_code = TARGET_ILL_ILLOPC;
 842                     break;
 843                 case EXCP_INVAL_LSWX:
 844             info.si_code = TARGET_ILL_ILLOPN;
 845                     break;
 846                 case EXCP_INVAL_SPR:
 847                     info.si_code = TARGET_ILL_PRVREG;
 848                     break;
 849                 case EXCP_INVAL_FP:
 850                     info.si_code = TARGET_ILL_COPROC;
 851                     break;
 852                 default:
 853                     fprintf(stderr, "Unknown invalid operation (%02x)\n",
 854                             env->error_code & 0xF);
 855                     if (loglevel) {
 856                         fprintf(logfile, "Unknown invalid operation (%02x)\n",
 857                                 env->error_code & 0xF);
 858                     }
 859                     info.si_code = TARGET_ILL_ILLADR;
 860                     break;
 861                 }
 862                 break;
 863             case EXCP_PRIV:
 864                 fprintf(stderr, "Privilege violation\n");
 865                 if (loglevel)
 866                     fprintf(logfile, "Privilege violation\n");
 867                 info.si_signo = TARGET_SIGILL;
 868                 info.si_errno = 0;
 869                 switch (env->error_code & 0xF) {
 870                 case EXCP_PRIV_OPC:
 871                     info.si_code = TARGET_ILL_PRVOPC;
 872                     break;
 873                 case EXCP_PRIV_REG:
 874                     info.si_code = TARGET_ILL_PRVREG;
 875                 break;
 876                 default:
 877                     fprintf(stderr, "Unknown privilege violation (%02x)\n",
 878                             env->error_code & 0xF);
 879                     info.si_code = TARGET_ILL_PRVOPC;
 880                     break;
 881                 }
 882                 break;
 883             case EXCP_TRAP:
 884                 fprintf(stderr, "Tried to call a TRAP\n");
 885                 if (loglevel)
 886                     fprintf(logfile, "Tried to call a TRAP\n");
 887                 abort();
 888             default:
 889                 /* Should not happen ! */
 890                 fprintf(stderr, "Unknown program exception (%02x)\n",
 891                         env->error_code);
 892                 if (loglevel) {
 893                     fprintf(logfile, "Unknwon program exception (%02x)\n",
 894                             env->error_code);
 895                 }
 896                 abort();
 897             }
 898             info._sifields._sigfault._addr = env->nip - 4;
 899             queue_signal(info.si_signo, &info);
 900             break;
 901         case EXCP_NO_FP:
 902             fprintf(stderr, "No floating point allowed\n");
 903             if (loglevel)
 904                 fprintf(logfile, "No floating point allowed\n");
 905             info.si_signo = TARGET_SIGILL;
 906             info.si_errno = 0;
 907             info.si_code = TARGET_ILL_COPROC;
 908             info._sifields._sigfault._addr = env->nip - 4;
 909             queue_signal(info.si_signo, &info);
 910             break;
 911         case EXCP_DECR:
 912             /* Should not happen ! */
 913             fprintf(stderr, "Decrementer exception\n");
 914             if (loglevel)
 915                 fprintf(logfile, "Decrementer exception\n");
 916             abort();
 917         case EXCP_RESA: /* Implementation specific          */
 918             /* Should not happen ! */
 919             fprintf(stderr, "RESA exception should never happen !\n");
 920             if (loglevel)
 921                 fprintf(logfile, "RESA exception should never happen !\n");
 922             abort();
 923         case EXCP_RESB: /* Implementation specific          */
 924             /* Should not happen ! */
 925             fprintf(stderr, "RESB exception should never happen !\n");
 926             if (loglevel)
 927                 fprintf(logfile, "RESB exception should never happen !\n");
 928             abort();
 929         case EXCP_TRACE:
 930             /* Do nothing: we use this to trace execution */
 931             break;
 932         case EXCP_FP_ASSIST:
 933             /* Should not happen ! */
 934             fprintf(stderr, "Floating point assist exception\n");
 935             if (loglevel)
 936                 fprintf(logfile, "Floating point assist exception\n");
 937             abort();
 938         case EXCP_MTMSR:
 939             /* We reloaded the msr, just go on */
 940             if (msr_pr == 0) {
 941                 fprintf(stderr, "Tried to go into supervisor mode !\n");
 942                 if (loglevel)
 943                     fprintf(logfile, "Tried to go into supervisor mode !\n");
 944                 abort();
 945         }
 946             break;
 947         case EXCP_BRANCH:
 948             /* We stopped because of a jump... */
 949             break;
 950         case EXCP_RFI:
 951             /* Should not occur: we always are in user mode */
 952             fprintf(stderr, "Return from interrupt ?\n");
 953             if (loglevel)
 954                 fprintf(logfile, "Return from interrupt ?\n");
 955             abort();
 956         case EXCP_INTERRUPT:
 957             /* Don't know why this should ever happen... */
 958             break;
 959         case EXCP_DEBUG:
 960             {
 961                 int sig;
 962
 963                 sig = gdb_handlesig (env, TARGET_SIGTRAP);
 964                 if (sig)
 965                   {
 966                     info.si_signo = sig;
 967                     info.si_errno = 0;
 968                     info.si_code = TARGET_TRAP_BRKPT;
 969                     queue_signal(info.si_signo, &info);
 970                   }
 971             }
 972             break;
 973         default:
 974             fprintf(stderr, "qemu: unhandled CPU exception 0x%x - aborting\n",
 975                     trapnr);
 976             if (loglevel) {
 977                 fprintf(logfile, "qemu: unhandled CPU exception 0x%02x - "
 978                         "0x%02x - aborting\n", trapnr, env->error_code);
 979             }
 980             abort();
 981         }
 982         process_pending_signals(env);
 983     }
 984 }
 985 #endif
 986
 987 void usage(void)
 988 {
 989     printf("qemu-" TARGET_ARCH " version " QEMU_VERSION ", Copyright (c) 2003-2004 Fabrice Bellard\n"
 990            "usage: qemu-" TARGET_ARCH " [-h] [-g] [-d opts] [-L path] [-s size] program [arguments...]\n"
 991            "Linux CPU emulator (compiled for %s emulation)\n"
 992            "\n"
 993            "-h           print this help\n"
 994            "-g           wait gdb connection to port %d\n"
 995            "-L path      set the elf interpreter prefix (default=%s)\n"
 996            "-s size      set the stack size in bytes (default=%ld)\n"
 997            "\n"
 998            "debug options:\n"
 999 #ifdef USE_CODE_COPY
1000            "-no-code-copy   disable code copy acceleration\n"
1001 #endif
1002            "-d options   activate log (logfile=%s)\n"
1003            "-p pagesize  set the host page size to 'pagesize'\n",
1004            TARGET_ARCH,
1005            DEFAULT_GDBSTUB_PORT,
1006            interp_prefix,
1007            x86_stack_size,
1008            DEBUG_LOGFILE);
1009     _exit(1);
1010 }
1011
1012 /* XXX: currently only used for async signals (see signal.c) */
1013 CPUState *global_env;
1014 /* used only if single thread */
1015 CPUState *cpu_single_env = NULL;
1016
1017 /* used to free thread contexts */
1018 TaskState *first_task_state;
1019
1020 int main(int argc, char **argv)
1021 {
1022     const char *filename;
1023     struct target_pt_regs regs1, *regs = &regs1;
1024     struct image_info info1, *info = &info1;
1025     TaskState ts1, *ts = &ts1;
1026     CPUState *env;
1027     int optind;
1028     const char *r;
1029     int use_gdbstub = 0;
1030
1031     if (argc <= 1)
1032         usage();
1033
1034     /* init debug */
1035     cpu_set_log_filename(DEBUG_LOGFILE);
1036
1037     optind = 1;
1038     for(;;) {
1039         if (optind >= argc)
1040             break;
1041         r = argv[optind];
1042         if (r[0] != '-')
1043             break;
1044         optind++;
1045         r++;
1046         if (!strcmp(r, "-")) {
1047             break;
1048         } else if (!strcmp(r, "d")) {
1049             int mask;
1050             CPULogItem *item;
1051
1052             if (optind >= argc)
1053                 break;
1054
1055             r = argv[optind++];
1056             mask = cpu_str_to_log_mask(r);
1057             if (!mask) {
1058                 printf("Log items (comma separated):\n");
1059                 for(item = cpu_log_items; item->mask != 0; item++) {
1060                     printf("%-10s %s\n", item->name, item->help);
1061                 }
1062                 exit(1);
1063             }
1064             cpu_set_log(mask);
1065         } else if (!strcmp(r, "s")) {
1066             r = argv[optind++];
1067             x86_stack_size = strtol(r, (char **)&r, 0);
1068             if (x86_stack_size <= 0)
1069                 usage();
1070             if (*r == 'M')
1071                 x86_stack_size *= 1024 * 1024;
1072             else if (*r == 'k' || *r == 'K')
1073                 x86_stack_size *= 1024;
1074         } else if (!strcmp(r, "L")) {
1075             interp_prefix = argv[optind++];
1076         } else if (!strcmp(r, "p")) {
1077             qemu_host_page_size = atoi(argv[optind++]);
1078             if (qemu_host_page_size == 0 ||
1079                 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
1080                 fprintf(stderr, "page size must be a power of two\n");
1081                 exit(1);
1082             }
1083         } else if (!strcmp(r, "g")) {
1084             use_gdbstub = 1;
1085         } else
1086 #ifdef USE_CODE_COPY
1087         if (!strcmp(r, "no-code-copy")) {
1088             code_copy_enabled = 0;
1089         } else
1090 #endif
1091         {
1092             usage();
1093         }
1094     }
1095     if (optind >= argc)
1096         usage();
1097     filename = argv[optind];
1098
1099     /* Zero out regs */
1100     memset(regs, 0, sizeof(struct target_pt_regs));
1101
1102     /* Zero out image_info */
1103     memset(info, 0, sizeof(struct image_info));
1104
1105     /* Scan interp_prefix dir for replacement files. */
1106     init_paths(interp_prefix);
1107
1108     /* NOTE: we need to init the CPU at this stage to get
1109        qemu_host_page_size */
1110     env = cpu_init();
1111
1112     if (elf_exec(filename, argv+optind, environ, regs, info) != 0) {
1113         printf("Error loading %s\n", filename);
1114         _exit(1);
1115     }
1116
1117     if (loglevel) {
1118         page_dump(logfile);
1119
1120         fprintf(logfile, "start_brk   0x%08lx\n" , info->start_brk);
1121         fprintf(logfile, "end_code    0x%08lx\n" , info->end_code);
1122         fprintf(logfile, "start_code  0x%08lx\n" , info->start_code);
1123         fprintf(logfile, "end_data    0x%08lx\n" , info->end_data);
1124         fprintf(logfile, "start_stack 0x%08lx\n" , info->start_stack);
1125         fprintf(logfile, "brk         0x%08lx\n" , info->brk);
1126         fprintf(logfile, "entry       0x%08lx\n" , info->entry);
1127     }
1128
1129     target_set_brk((char *)info->brk);
1130     syscall_init();
1131     signal_init();
1132
1133     global_env = env;
1134
1135     /* build Task State */
1136     memset(ts, 0, sizeof(TaskState));
1137     env->opaque = ts;
1138     ts->used = 1;
1139     env->user_mode_only = 1;
1140
1141 #if defined(TARGET_I386)
1142     cpu_x86_set_cpl(env, 3);
1143
1144     env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
1145     env->hflags |= HF_PE_MASK;
1146     if (env->cpuid_features & CPUID_SSE) {
1147         env->cr[4] |= CR4_OSFXSR_MASK;
1148         env->hflags |= HF_OSFXSR_MASK;
1149     }
1150
1151     /* flags setup : we activate the IRQs by default as in user mode */
1152     env->eflags |= IF_MASK;
1153
1154     /* linux register setup */
1155     env->regs[R_EAX] = regs->eax;
1156     env->regs[R_EBX] = regs->ebx;
1157     env->regs[R_ECX] = regs->ecx;
1158     env->regs[R_EDX] = regs->edx;
1159     env->regs[R_ESI] = regs->esi;
1160     env->regs[R_EDI] = regs->edi;
1161     env->regs[R_EBP] = regs->ebp;
1162     env->regs[R_ESP] = regs->esp;
1163     env->eip = regs->eip;
1164
1165     /* linux interrupt setup */
1166     env->idt.base = (long)idt_table;
1167     env->idt.limit = sizeof(idt_table) - 1;
1168     set_idt(0, 0);
1169     set_idt(1, 0);
1170     set_idt(2, 0);
1171     set_idt(3, 3);
1172     set_idt(4, 3);
1173     set_idt(5, 3);
1174     set_idt(6, 0);
1175     set_idt(7, 0);
1176     set_idt(8, 0);
1177     set_idt(9, 0);
1178     set_idt(10, 0);
1179     set_idt(11, 0);
1180     set_idt(12, 0);
1181     set_idt(13, 0);
1182     set_idt(14, 0);
1183     set_idt(15, 0);
1184     set_idt(16, 0);
1185     set_idt(17, 0);
1186     set_idt(18, 0);
1187     set_idt(19, 0);
1188     set_idt(0x80, 3);
1189
1190     /* linux segment setup */
1191     env->gdt.base = (long)gdt_table;
1192     env->gdt.limit = sizeof(gdt_table) - 1;
1193     write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1194              DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1195              (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1196     write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff,
1197              DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1198              (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
1199     cpu_x86_load_seg(env, R_CS, __USER_CS);
1200     cpu_x86_load_seg(env, R_DS, __USER_DS);
1201     cpu_x86_load_seg(env, R_ES, __USER_DS);
1202     cpu_x86_load_seg(env, R_SS, __USER_DS);
1203     cpu_x86_load_seg(env, R_FS, __USER_DS);
1204     cpu_x86_load_seg(env, R_GS, __USER_DS);
1205
1206 #elif defined(TARGET_ARM)
1207     {
1208         int i;
1209         for(i = 0; i < 16; i++) {
1210             env->regs[i] = regs->uregs[i];
1211         }
1212         env->cpsr = regs->uregs[16];
1213         ts->stack_base = info->start_stack;
1214         ts->heap_base = info->brk;
1215         /* This will be filled in on the first SYS_HEAPINFO call.  */
1216         ts->heap_limit = 0;
1217     }
1218 #elif defined(TARGET_SPARC)
1219     {
1220         int i;
1221         env->pc = regs->pc;
1222         env->npc = regs->npc;
1223         env->y = regs->y;
1224         for(i = 0; i < 8; i++)
1225             env->gregs[i] = regs->u_regs[i];
1226         for(i = 0; i < 8; i++)
1227             env->regwptr[i] = regs->u_regs[i + 8];
1228     }
1229 #elif defined(TARGET_PPC)
1230     {
1231         int i;
1232         for (i = 0; i < 32; i++) {
1233             if (i != 12 && i != 6 && i != 13)
1234                 env->msr[i] = (regs->msr >> i) & 1;
1235         }
1236         env->nip = regs->nip;
1237         for(i = 0; i < 32; i++) {
1238             env->gpr[i] = regs->gpr[i];
1239         }
1240     }
1241 #else
1242 #error unsupported target CPU
1243 #endif
1244
1245     if (use_gdbstub) {
1246         gdbserver_start (DEFAULT_GDBSTUB_PORT);
1247         gdb_handlesig(env, 0);
1248     }
1249     cpu_loop(env);
1250     /* never exits */
1251     return 0;
1252 }