1 /* 2 * qemu user main 3 * 4 * Copyright (c) 2003-2008 Fabrice Bellard 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, see <http://www.gnu.org/licenses/>. 18 */ 19 #include <stdlib.h> 20 #include <stdio.h> 21 #include <stdarg.h> 22 #include <string.h> 23 #include <errno.h> 24 #include <unistd.h> 25 #include <machine/trap.h> 26 #include <sys/types.h> 27 #include <sys/mman.h> 28 29 #include "qemu.h" 30 #include "qemu-common.h" 31 /* For tb_lock */ 32 #include "exec-all.h" 33 #include "tcg.h" 34 #include "qemu-timer.h" 35 #include "envlist.h" 36 37 #define DEBUG_LOGFILE "/tmp/qemu.log" 38 39 int singlestep; 40 #if defined(CONFIG_USE_GUEST_BASE) 41 unsigned long mmap_min_addr; 42 unsigned long guest_base; 43 int have_guest_base; 44 #endif 45 46 static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX; 47 const char *qemu_uname_release = CONFIG_UNAME_RELEASE; 48 extern char **environ; 49 enum BSDType bsd_type; 50 51 /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so 52 we allocate a bigger stack. Need a better solution, for example 53 by remapping the process stack directly at the right place */ 54 unsigned long x86_stack_size = 512 * 1024; 55 56 void gemu_log(const char *fmt, ...) 57 { 58 va_list ap; 59 60 va_start(ap, fmt); 61 vfprintf(stderr, fmt, ap); 62 va_end(ap); 63 } 64 65 #if defined(TARGET_I386) 66 int cpu_get_pic_interrupt(CPUState *env) 67 { 68 return -1; 69 } 70 #endif 71 72 /* These are no-ops because we are not threadsafe. */ 73 static inline void cpu_exec_start(CPUState *env) 74 { 75 } 76 77 static inline void cpu_exec_end(CPUState *env) 78 { 79 } 80 81 static inline void start_exclusive(void) 82 { 83 } 84 85 static inline void end_exclusive(void) 86 { 87 } 88 89 void fork_start(void) 90 { 91 } 92 93 void fork_end(int child) 94 { 95 if (child) { 96 gdbserver_fork(thread_env); 97 } 98 } 99 100 void cpu_list_lock(void) 101 { 102 } 103 104 void cpu_list_unlock(void) 105 { 106 } 107 108 #ifdef TARGET_I386 109 /***********************************************************/ 110 /* CPUX86 core interface */ 111 112 void cpu_smm_update(CPUState *env) 113 { 114 } 115 116 uint64_t cpu_get_tsc(CPUX86State *env) 117 { 118 return cpu_get_real_ticks(); 119 } 120 121 static void write_dt(void *ptr, unsigned long addr, unsigned long limit, 122 int flags) 123 { 124 unsigned int e1, e2; 125 uint32_t *p; 126 e1 = (addr << 16) | (limit & 0xffff); 127 e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000); 128 e2 |= flags; 129 p = ptr; 130 p[0] = tswap32(e1); 131 p[1] = tswap32(e2); 132 } 133 134 static uint64_t *idt_table; 135 #ifdef TARGET_X86_64 136 static void set_gate64(void *ptr, unsigned int type, unsigned int dpl, 137 uint64_t addr, unsigned int sel) 138 { 139 uint32_t *p, e1, e2; 140 e1 = (addr & 0xffff) | (sel << 16); 141 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8); 142 p = ptr; 143 p[0] = tswap32(e1); 144 p[1] = tswap32(e2); 145 p[2] = tswap32(addr >> 32); 146 p[3] = 0; 147 } 148 /* only dpl matters as we do only user space emulation */ 149 static void set_idt(int n, unsigned int dpl) 150 { 151 set_gate64(idt_table + n * 2, 0, dpl, 0, 0); 152 } 153 #else 154 static void set_gate(void *ptr, unsigned int type, unsigned int dpl, 155 uint32_t addr, unsigned int sel) 156 { 157 uint32_t *p, e1, e2; 158 e1 = (addr & 0xffff) | (sel << 16); 159 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8); 160 p = ptr; 161 p[0] = tswap32(e1); 162 p[1] = tswap32(e2); 163 } 164 165 /* only dpl matters as we do only user space emulation */ 166 static void set_idt(int n, unsigned int dpl) 167 { 168 set_gate(idt_table + n, 0, dpl, 0, 0); 169 } 170 #endif 171 172 void cpu_loop(CPUX86State *env) 173 { 174 int trapnr; 175 abi_ulong pc; 176 //target_siginfo_t info; 177 178 for(;;) { 179 trapnr = cpu_x86_exec(env); 180 switch(trapnr) { 181 case 0x80: 182 /* syscall from int $0x80 */ 183 if (bsd_type == target_freebsd) { 184 abi_ulong params = (abi_ulong) env->regs[R_ESP] + 185 sizeof(int32_t); 186 int32_t syscall_nr = env->regs[R_EAX]; 187 int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8; 188 189 if (syscall_nr == TARGET_FREEBSD_NR_syscall) { 190 get_user_s32(syscall_nr, params); 191 params += sizeof(int32_t); 192 } else if (syscall_nr == TARGET_FREEBSD_NR___syscall) { 193 get_user_s32(syscall_nr, params); 194 params += sizeof(int64_t); 195 } 196 get_user_s32(arg1, params); 197 params += sizeof(int32_t); 198 get_user_s32(arg2, params); 199 params += sizeof(int32_t); 200 get_user_s32(arg3, params); 201 params += sizeof(int32_t); 202 get_user_s32(arg4, params); 203 params += sizeof(int32_t); 204 get_user_s32(arg5, params); 205 params += sizeof(int32_t); 206 get_user_s32(arg6, params); 207 params += sizeof(int32_t); 208 get_user_s32(arg7, params); 209 params += sizeof(int32_t); 210 get_user_s32(arg8, params); 211 env->regs[R_EAX] = do_freebsd_syscall(env, 212 syscall_nr, 213 arg1, 214 arg2, 215 arg3, 216 arg4, 217 arg5, 218 arg6, 219 arg7, 220 arg8); 221 } else { //if (bsd_type == target_openbsd) 222 env->regs[R_EAX] = do_openbsd_syscall(env, 223 env->regs[R_EAX], 224 env->regs[R_EBX], 225 env->regs[R_ECX], 226 env->regs[R_EDX], 227 env->regs[R_ESI], 228 env->regs[R_EDI], 229 env->regs[R_EBP]); 230 } 231 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) { 232 env->regs[R_EAX] = -env->regs[R_EAX]; 233 env->eflags |= CC_C; 234 } else { 235 env->eflags &= ~CC_C; 236 } 237 break; 238 #ifndef TARGET_ABI32 239 case EXCP_SYSCALL: 240 /* syscall from syscall instruction */ 241 if (bsd_type == target_freebsd) 242 env->regs[R_EAX] = do_freebsd_syscall(env, 243 env->regs[R_EAX], 244 env->regs[R_EDI], 245 env->regs[R_ESI], 246 env->regs[R_EDX], 247 env->regs[R_ECX], 248 env->regs[8], 249 env->regs[9], 0, 0); 250 else { //if (bsd_type == target_openbsd) 251 env->regs[R_EAX] = do_openbsd_syscall(env, 252 env->regs[R_EAX], 253 env->regs[R_EDI], 254 env->regs[R_ESI], 255 env->regs[R_EDX], 256 env->regs[10], 257 env->regs[8], 258 env->regs[9]); 259 } 260 env->eip = env->exception_next_eip; 261 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) { 262 env->regs[R_EAX] = -env->regs[R_EAX]; 263 env->eflags |= CC_C; 264 } else { 265 env->eflags &= ~CC_C; 266 } 267 break; 268 #endif 269 #if 0 270 case EXCP0B_NOSEG: 271 case EXCP0C_STACK: 272 info.si_signo = SIGBUS; 273 info.si_errno = 0; 274 info.si_code = TARGET_SI_KERNEL; 275 info._sifields._sigfault._addr = 0; 276 queue_signal(env, info.si_signo, &info); 277 break; 278 case EXCP0D_GPF: 279 /* XXX: potential problem if ABI32 */ 280 #ifndef TARGET_X86_64 281 if (env->eflags & VM_MASK) { 282 handle_vm86_fault(env); 283 } else 284 #endif 285 { 286 info.si_signo = SIGSEGV; 287 info.si_errno = 0; 288 info.si_code = TARGET_SI_KERNEL; 289 info._sifields._sigfault._addr = 0; 290 queue_signal(env, info.si_signo, &info); 291 } 292 break; 293 case EXCP0E_PAGE: 294 info.si_signo = SIGSEGV; 295 info.si_errno = 0; 296 if (!(env->error_code & 1)) 297 info.si_code = TARGET_SEGV_MAPERR; 298 else 299 info.si_code = TARGET_SEGV_ACCERR; 300 info._sifields._sigfault._addr = env->cr[2]; 301 queue_signal(env, info.si_signo, &info); 302 break; 303 case EXCP00_DIVZ: 304 #ifndef TARGET_X86_64 305 if (env->eflags & VM_MASK) { 306 handle_vm86_trap(env, trapnr); 307 } else 308 #endif 309 { 310 /* division by zero */ 311 info.si_signo = SIGFPE; 312 info.si_errno = 0; 313 info.si_code = TARGET_FPE_INTDIV; 314 info._sifields._sigfault._addr = env->eip; 315 queue_signal(env, info.si_signo, &info); 316 } 317 break; 318 case EXCP01_DB: 319 case EXCP03_INT3: 320 #ifndef TARGET_X86_64 321 if (env->eflags & VM_MASK) { 322 handle_vm86_trap(env, trapnr); 323 } else 324 #endif 325 { 326 info.si_signo = SIGTRAP; 327 info.si_errno = 0; 328 if (trapnr == EXCP01_DB) { 329 info.si_code = TARGET_TRAP_BRKPT; 330 info._sifields._sigfault._addr = env->eip; 331 } else { 332 info.si_code = TARGET_SI_KERNEL; 333 info._sifields._sigfault._addr = 0; 334 } 335 queue_signal(env, info.si_signo, &info); 336 } 337 break; 338 case EXCP04_INTO: 339 case EXCP05_BOUND: 340 #ifndef TARGET_X86_64 341 if (env->eflags & VM_MASK) { 342 handle_vm86_trap(env, trapnr); 343 } else 344 #endif 345 { 346 info.si_signo = SIGSEGV; 347 info.si_errno = 0; 348 info.si_code = TARGET_SI_KERNEL; 349 info._sifields._sigfault._addr = 0; 350 queue_signal(env, info.si_signo, &info); 351 } 352 break; 353 case EXCP06_ILLOP: 354 info.si_signo = SIGILL; 355 info.si_errno = 0; 356 info.si_code = TARGET_ILL_ILLOPN; 357 info._sifields._sigfault._addr = env->eip; 358 queue_signal(env, info.si_signo, &info); 359 break; 360 #endif 361 case EXCP_INTERRUPT: 362 /* just indicate that signals should be handled asap */ 363 break; 364 #if 0 365 case EXCP_DEBUG: 366 { 367 int sig; 368 369 sig = gdb_handlesig (env, TARGET_SIGTRAP); 370 if (sig) 371 { 372 info.si_signo = sig; 373 info.si_errno = 0; 374 info.si_code = TARGET_TRAP_BRKPT; 375 queue_signal(env, info.si_signo, &info); 376 } 377 } 378 break; 379 #endif 380 default: 381 pc = env->segs[R_CS].base + env->eip; 382 fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n", 383 (long)pc, trapnr); 384 abort(); 385 } 386 process_pending_signals(env); 387 } 388 } 389 #endif 390 391 #ifdef TARGET_SPARC 392 #define SPARC64_STACK_BIAS 2047 393 394 //#define DEBUG_WIN 395 /* WARNING: dealing with register windows _is_ complicated. More info 396 can be found at http://www.sics.se/~psm/sparcstack.html */ 397 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index) 398 { 399 index = (index + cwp * 16) % (16 * env->nwindows); 400 /* wrap handling : if cwp is on the last window, then we use the 401 registers 'after' the end */ 402 if (index < 8 && env->cwp == env->nwindows - 1) 403 index += 16 * env->nwindows; 404 return index; 405 } 406 407 /* save the register window 'cwp1' */ 408 static inline void save_window_offset(CPUSPARCState *env, int cwp1) 409 { 410 unsigned int i; 411 abi_ulong sp_ptr; 412 413 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)]; 414 #ifdef TARGET_SPARC64 415 if (sp_ptr & 3) 416 sp_ptr += SPARC64_STACK_BIAS; 417 #endif 418 #if defined(DEBUG_WIN) 419 printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n", 420 sp_ptr, cwp1); 421 #endif 422 for(i = 0; i < 16; i++) { 423 /* FIXME - what to do if put_user() fails? */ 424 put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr); 425 sp_ptr += sizeof(abi_ulong); 426 } 427 } 428 429 static void save_window(CPUSPARCState *env) 430 { 431 #ifndef TARGET_SPARC64 432 unsigned int new_wim; 433 new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) & 434 ((1LL << env->nwindows) - 1); 435 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2)); 436 env->wim = new_wim; 437 #else 438 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2)); 439 env->cansave++; 440 env->canrestore--; 441 #endif 442 } 443 444 static void restore_window(CPUSPARCState *env) 445 { 446 #ifndef TARGET_SPARC64 447 unsigned int new_wim; 448 #endif 449 unsigned int i, cwp1; 450 abi_ulong sp_ptr; 451 452 #ifndef TARGET_SPARC64 453 new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) & 454 ((1LL << env->nwindows) - 1); 455 #endif 456 457 /* restore the invalid window */ 458 cwp1 = cpu_cwp_inc(env, env->cwp + 1); 459 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)]; 460 #ifdef TARGET_SPARC64 461 if (sp_ptr & 3) 462 sp_ptr += SPARC64_STACK_BIAS; 463 #endif 464 #if defined(DEBUG_WIN) 465 printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n", 466 sp_ptr, cwp1); 467 #endif 468 for(i = 0; i < 16; i++) { 469 /* FIXME - what to do if get_user() fails? */ 470 get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr); 471 sp_ptr += sizeof(abi_ulong); 472 } 473 #ifdef TARGET_SPARC64 474 env->canrestore++; 475 if (env->cleanwin < env->nwindows - 1) 476 env->cleanwin++; 477 env->cansave--; 478 #else 479 env->wim = new_wim; 480 #endif 481 } 482 483 static void flush_windows(CPUSPARCState *env) 484 { 485 int offset, cwp1; 486 487 offset = 1; 488 for(;;) { 489 /* if restore would invoke restore_window(), then we can stop */ 490 cwp1 = cpu_cwp_inc(env, env->cwp + offset); 491 #ifndef TARGET_SPARC64 492 if (env->wim & (1 << cwp1)) 493 break; 494 #else 495 if (env->canrestore == 0) 496 break; 497 env->cansave++; 498 env->canrestore--; 499 #endif 500 save_window_offset(env, cwp1); 501 offset++; 502 } 503 cwp1 = cpu_cwp_inc(env, env->cwp + 1); 504 #ifndef TARGET_SPARC64 505 /* set wim so that restore will reload the registers */ 506 env->wim = 1 << cwp1; 507 #endif 508 #if defined(DEBUG_WIN) 509 printf("flush_windows: nb=%d\n", offset - 1); 510 #endif 511 } 512 513 void cpu_loop(CPUSPARCState *env) 514 { 515 int trapnr, ret, syscall_nr; 516 //target_siginfo_t info; 517 518 while (1) { 519 trapnr = cpu_sparc_exec (env); 520 521 switch (trapnr) { 522 #ifndef TARGET_SPARC64 523 case 0x80: 524 #else 525 /* FreeBSD uses 0x141 for syscalls too */ 526 case 0x141: 527 if (bsd_type != target_freebsd) 528 goto badtrap; 529 case 0x100: 530 #endif 531 syscall_nr = env->gregs[1]; 532 if (bsd_type == target_freebsd) 533 ret = do_freebsd_syscall(env, syscall_nr, 534 env->regwptr[0], env->regwptr[1], 535 env->regwptr[2], env->regwptr[3], 536 env->regwptr[4], env->regwptr[5], 0, 0); 537 else if (bsd_type == target_netbsd) 538 ret = do_netbsd_syscall(env, syscall_nr, 539 env->regwptr[0], env->regwptr[1], 540 env->regwptr[2], env->regwptr[3], 541 env->regwptr[4], env->regwptr[5]); 542 else { //if (bsd_type == target_openbsd) 543 #if defined(TARGET_SPARC64) 544 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG | 545 TARGET_OPENBSD_SYSCALL_G2RFLAG); 546 #endif 547 ret = do_openbsd_syscall(env, syscall_nr, 548 env->regwptr[0], env->regwptr[1], 549 env->regwptr[2], env->regwptr[3], 550 env->regwptr[4], env->regwptr[5]); 551 } 552 if ((unsigned int)ret >= (unsigned int)(-515)) { 553 ret = -ret; 554 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) 555 env->xcc |= PSR_CARRY; 556 #else 557 env->psr |= PSR_CARRY; 558 #endif 559 } else { 560 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) 561 env->xcc &= ~PSR_CARRY; 562 #else 563 env->psr &= ~PSR_CARRY; 564 #endif 565 } 566 env->regwptr[0] = ret; 567 /* next instruction */ 568 #if defined(TARGET_SPARC64) 569 if (bsd_type == target_openbsd && 570 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) { 571 env->pc = env->gregs[2]; 572 env->npc = env->pc + 4; 573 } else if (bsd_type == target_openbsd && 574 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) { 575 env->pc = env->gregs[7]; 576 env->npc = env->pc + 4; 577 } else { 578 env->pc = env->npc; 579 env->npc = env->npc + 4; 580 } 581 #else 582 env->pc = env->npc; 583 env->npc = env->npc + 4; 584 #endif 585 break; 586 case 0x83: /* flush windows */ 587 #ifdef TARGET_ABI32 588 case 0x103: 589 #endif 590 flush_windows(env); 591 /* next instruction */ 592 env->pc = env->npc; 593 env->npc = env->npc + 4; 594 break; 595 #ifndef TARGET_SPARC64 596 case TT_WIN_OVF: /* window overflow */ 597 save_window(env); 598 break; 599 case TT_WIN_UNF: /* window underflow */ 600 restore_window(env); 601 break; 602 case TT_TFAULT: 603 case TT_DFAULT: 604 #if 0 605 { 606 info.si_signo = SIGSEGV; 607 info.si_errno = 0; 608 /* XXX: check env->error_code */ 609 info.si_code = TARGET_SEGV_MAPERR; 610 info._sifields._sigfault._addr = env->mmuregs[4]; 611 queue_signal(env, info.si_signo, &info); 612 } 613 #endif 614 break; 615 #else 616 case TT_SPILL: /* window overflow */ 617 save_window(env); 618 break; 619 case TT_FILL: /* window underflow */ 620 restore_window(env); 621 break; 622 case TT_TFAULT: 623 case TT_DFAULT: 624 #if 0 625 { 626 info.si_signo = SIGSEGV; 627 info.si_errno = 0; 628 /* XXX: check env->error_code */ 629 info.si_code = TARGET_SEGV_MAPERR; 630 if (trapnr == TT_DFAULT) 631 info._sifields._sigfault._addr = env->dmmuregs[4]; 632 else 633 info._sifields._sigfault._addr = env->tsptr->tpc; 634 //queue_signal(env, info.si_signo, &info); 635 } 636 #endif 637 break; 638 #endif 639 case EXCP_INTERRUPT: 640 /* just indicate that signals should be handled asap */ 641 break; 642 case EXCP_DEBUG: 643 { 644 int sig; 645 646 sig = gdb_handlesig (env, TARGET_SIGTRAP); 647 #if 0 648 if (sig) 649 { 650 info.si_signo = sig; 651 info.si_errno = 0; 652 info.si_code = TARGET_TRAP_BRKPT; 653 //queue_signal(env, info.si_signo, &info); 654 } 655 #endif 656 } 657 break; 658 default: 659 #ifdef TARGET_SPARC64 660 badtrap: 661 #endif 662 printf ("Unhandled trap: 0x%x\n", trapnr); 663 cpu_dump_state(env, stderr, fprintf, 0); 664 exit (1); 665 } 666 process_pending_signals (env); 667 } 668 } 669 670 #endif 671 672 static void usage(void) 673 { 674 printf("qemu-" TARGET_ARCH " version " QEMU_VERSION ", Copyright (c) 2003-2008 Fabrice Bellard\n" 675 "usage: qemu-" TARGET_ARCH " [options] program [arguments...]\n" 676 "BSD CPU emulator (compiled for %s emulation)\n" 677 "\n" 678 "Standard options:\n" 679 "-h print this help\n" 680 "-g port wait gdb connection to port\n" 681 "-L path set the elf interpreter prefix (default=%s)\n" 682 "-s size set the stack size in bytes (default=%ld)\n" 683 "-cpu model select CPU (-cpu ? for list)\n" 684 "-drop-ld-preload drop LD_PRELOAD for target process\n" 685 "-E var=value sets/modifies targets environment variable(s)\n" 686 "-U var unsets targets environment variable(s)\n" 687 #if defined(CONFIG_USE_GUEST_BASE) 688 "-B address set guest_base address to address\n" 689 #endif 690 "-bsd type select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n" 691 "\n" 692 "Debug options:\n" 693 "-d options activate log (default logfile=%s)\n" 694 "-D logfile override default logfile location\n" 695 "-p pagesize set the host page size to 'pagesize'\n" 696 "-singlestep always run in singlestep mode\n" 697 "-strace log system calls\n" 698 "\n" 699 "Environment variables:\n" 700 "QEMU_STRACE Print system calls and arguments similar to the\n" 701 " 'strace' program. Enable by setting to any value.\n" 702 "You can use -E and -U options to set/unset environment variables\n" 703 "for target process. It is possible to provide several variables\n" 704 "by repeating the option. For example:\n" 705 " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n" 706 "Note that if you provide several changes to single variable\n" 707 "last change will stay in effect.\n" 708 , 709 TARGET_ARCH, 710 interp_prefix, 711 x86_stack_size, 712 DEBUG_LOGFILE); 713 exit(1); 714 } 715 716 THREAD CPUState *thread_env; 717 718 /* Assumes contents are already zeroed. */ 719 void init_task_state(TaskState *ts) 720 { 721 int i; 722 723 ts->used = 1; 724 ts->first_free = ts->sigqueue_table; 725 for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) { 726 ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1]; 727 } 728 ts->sigqueue_table[i].next = NULL; 729 } 730 731 int main(int argc, char **argv) 732 { 733 const char *filename; 734 const char *cpu_model; 735 const char *log_file = DEBUG_LOGFILE; 736 const char *log_mask = NULL; 737 struct target_pt_regs regs1, *regs = ®s1; 738 struct image_info info1, *info = &info1; 739 TaskState ts1, *ts = &ts1; 740 CPUState *env; 741 int optind; 742 const char *r; 743 int gdbstub_port = 0; 744 char **target_environ, **wrk; 745 envlist_t *envlist = NULL; 746 bsd_type = target_openbsd; 747 748 if (argc <= 1) 749 usage(); 750 751 if ((envlist = envlist_create()) == NULL) { 752 (void) fprintf(stderr, "Unable to allocate envlist\n"); 753 exit(1); 754 } 755 756 /* add current environment into the list */ 757 for (wrk = environ; *wrk != NULL; wrk++) { 758 (void) envlist_setenv(envlist, *wrk); 759 } 760 761 cpu_model = NULL; 762 #if defined(cpudef_setup) 763 cpudef_setup(); /* parse cpu definitions in target config file (TBD) */ 764 #endif 765 766 optind = 1; 767 for(;;) { 768 if (optind >= argc) 769 break; 770 r = argv[optind]; 771 if (r[0] != '-') 772 break; 773 optind++; 774 r++; 775 if (!strcmp(r, "-")) { 776 break; 777 } else if (!strcmp(r, "d")) { 778 if (optind >= argc) { 779 break; 780 } 781 log_mask = argv[optind++]; 782 } else if (!strcmp(r, "D")) { 783 if (optind >= argc) { 784 break; 785 } 786 log_file = argv[optind++]; 787 } else if (!strcmp(r, "E")) { 788 r = argv[optind++]; 789 if (envlist_setenv(envlist, r) != 0) 790 usage(); 791 } else if (!strcmp(r, "ignore-environment")) { 792 envlist_free(envlist); 793 if ((envlist = envlist_create()) == NULL) { 794 (void) fprintf(stderr, "Unable to allocate envlist\n"); 795 exit(1); 796 } 797 } else if (!strcmp(r, "U")) { 798 r = argv[optind++]; 799 if (envlist_unsetenv(envlist, r) != 0) 800 usage(); 801 } else if (!strcmp(r, "s")) { 802 r = argv[optind++]; 803 x86_stack_size = strtol(r, (char **)&r, 0); 804 if (x86_stack_size <= 0) 805 usage(); 806 if (*r == 'M') 807 x86_stack_size *= 1024 * 1024; 808 else if (*r == 'k' || *r == 'K') 809 x86_stack_size *= 1024; 810 } else if (!strcmp(r, "L")) { 811 interp_prefix = argv[optind++]; 812 } else if (!strcmp(r, "p")) { 813 qemu_host_page_size = atoi(argv[optind++]); 814 if (qemu_host_page_size == 0 || 815 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) { 816 fprintf(stderr, "page size must be a power of two\n"); 817 exit(1); 818 } 819 } else if (!strcmp(r, "g")) { 820 gdbstub_port = atoi(argv[optind++]); 821 } else if (!strcmp(r, "r")) { 822 qemu_uname_release = argv[optind++]; 823 } else if (!strcmp(r, "cpu")) { 824 cpu_model = argv[optind++]; 825 if (strcmp(cpu_model, "?") == 0) { 826 /* XXX: implement xxx_cpu_list for targets that still miss it */ 827 #if defined(cpu_list) 828 cpu_list(stdout, &fprintf); 829 #endif 830 exit(1); 831 } 832 #if defined(CONFIG_USE_GUEST_BASE) 833 } else if (!strcmp(r, "B")) { 834 guest_base = strtol(argv[optind++], NULL, 0); 835 have_guest_base = 1; 836 #endif 837 } else if (!strcmp(r, "drop-ld-preload")) { 838 (void) envlist_unsetenv(envlist, "LD_PRELOAD"); 839 } else if (!strcmp(r, "bsd")) { 840 if (!strcasecmp(argv[optind], "freebsd")) { 841 bsd_type = target_freebsd; 842 } else if (!strcasecmp(argv[optind], "netbsd")) { 843 bsd_type = target_netbsd; 844 } else if (!strcasecmp(argv[optind], "openbsd")) { 845 bsd_type = target_openbsd; 846 } else { 847 usage(); 848 } 849 optind++; 850 } else if (!strcmp(r, "singlestep")) { 851 singlestep = 1; 852 } else if (!strcmp(r, "strace")) { 853 do_strace = 1; 854 } else 855 { 856 usage(); 857 } 858 } 859 if (optind >= argc) 860 usage(); 861 filename = argv[optind]; 862 863 /* init debug */ 864 cpu_set_log_filename(log_file); 865 if (log_mask) { 866 int mask; 867 const CPULogItem *item; 868 869 mask = cpu_str_to_log_mask(r); 870 if (!mask) { 871 printf("Log items (comma separated):\n"); 872 for (item = cpu_log_items; item->mask != 0; item++) { 873 printf("%-10s %s\n", item->name, item->help); 874 } 875 exit(1); 876 } 877 cpu_set_log(mask); 878 } 879 880 /* Zero out regs */ 881 memset(regs, 0, sizeof(struct target_pt_regs)); 882 883 /* Zero out image_info */ 884 memset(info, 0, sizeof(struct image_info)); 885 886 /* Scan interp_prefix dir for replacement files. */ 887 init_paths(interp_prefix); 888 889 if (cpu_model == NULL) { 890 #if defined(TARGET_I386) 891 #ifdef TARGET_X86_64 892 cpu_model = "qemu64"; 893 #else 894 cpu_model = "qemu32"; 895 #endif 896 #elif defined(TARGET_SPARC) 897 #ifdef TARGET_SPARC64 898 cpu_model = "TI UltraSparc II"; 899 #else 900 cpu_model = "Fujitsu MB86904"; 901 #endif 902 #else 903 cpu_model = "any"; 904 #endif 905 } 906 cpu_exec_init_all(0); 907 /* NOTE: we need to init the CPU at this stage to get 908 qemu_host_page_size */ 909 env = cpu_init(cpu_model); 910 if (!env) { 911 fprintf(stderr, "Unable to find CPU definition\n"); 912 exit(1); 913 } 914 #if defined(TARGET_I386) || defined(TARGET_SPARC) || defined(TARGET_PPC) 915 cpu_reset(env); 916 #endif 917 thread_env = env; 918 919 if (getenv("QEMU_STRACE")) { 920 do_strace = 1; 921 } 922 923 target_environ = envlist_to_environ(envlist, NULL); 924 envlist_free(envlist); 925 926 #if defined(CONFIG_USE_GUEST_BASE) 927 /* 928 * Now that page sizes are configured in cpu_init() we can do 929 * proper page alignment for guest_base. 930 */ 931 guest_base = HOST_PAGE_ALIGN(guest_base); 932 933 /* 934 * Read in mmap_min_addr kernel parameter. This value is used 935 * When loading the ELF image to determine whether guest_base 936 * is needed. 937 * 938 * When user has explicitly set the quest base, we skip this 939 * test. 940 */ 941 if (!have_guest_base) { 942 FILE *fp; 943 944 if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) { 945 unsigned long tmp; 946 if (fscanf(fp, "%lu", &tmp) == 1) { 947 mmap_min_addr = tmp; 948 qemu_log("host mmap_min_addr=0x%lx\n", mmap_min_addr); 949 } 950 fclose(fp); 951 } 952 } 953 #endif /* CONFIG_USE_GUEST_BASE */ 954 955 if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) { 956 printf("Error loading %s\n", filename); 957 _exit(1); 958 } 959 960 for (wrk = target_environ; *wrk; wrk++) { 961 free(*wrk); 962 } 963 964 free(target_environ); 965 966 if (qemu_log_enabled()) { 967 #if defined(CONFIG_USE_GUEST_BASE) 968 qemu_log("guest_base 0x%lx\n", guest_base); 969 #endif 970 log_page_dump(); 971 972 qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk); 973 qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code); 974 qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n", 975 info->start_code); 976 qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n", 977 info->start_data); 978 qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data); 979 qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n", 980 info->start_stack); 981 qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk); 982 qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry); 983 } 984 985 target_set_brk(info->brk); 986 syscall_init(); 987 signal_init(); 988 989 #if defined(CONFIG_USE_GUEST_BASE) 990 /* Now that we've loaded the binary, GUEST_BASE is fixed. Delay 991 generating the prologue until now so that the prologue can take 992 the real value of GUEST_BASE into account. */ 993 tcg_prologue_init(&tcg_ctx); 994 #endif 995 996 /* build Task State */ 997 memset(ts, 0, sizeof(TaskState)); 998 init_task_state(ts); 999 ts->info = info; 1000 env->opaque = ts; 1001 1002 #if defined(TARGET_I386) 1003 cpu_x86_set_cpl(env, 3); 1004 1005 env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK; 1006 env->hflags |= HF_PE_MASK; 1007 if (env->cpuid_features & CPUID_SSE) { 1008 env->cr[4] |= CR4_OSFXSR_MASK; 1009 env->hflags |= HF_OSFXSR_MASK; 1010 } 1011 #ifndef TARGET_ABI32 1012 /* enable 64 bit mode if possible */ 1013 if (!(env->cpuid_ext2_features & CPUID_EXT2_LM)) { 1014 fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n"); 1015 exit(1); 1016 } 1017 env->cr[4] |= CR4_PAE_MASK; 1018 env->efer |= MSR_EFER_LMA | MSR_EFER_LME; 1019 env->hflags |= HF_LMA_MASK; 1020 #endif 1021 1022 /* flags setup : we activate the IRQs by default as in user mode */ 1023 env->eflags |= IF_MASK; 1024 1025 /* linux register setup */ 1026 #ifndef TARGET_ABI32 1027 env->regs[R_EAX] = regs->rax; 1028 env->regs[R_EBX] = regs->rbx; 1029 env->regs[R_ECX] = regs->rcx; 1030 env->regs[R_EDX] = regs->rdx; 1031 env->regs[R_ESI] = regs->rsi; 1032 env->regs[R_EDI] = regs->rdi; 1033 env->regs[R_EBP] = regs->rbp; 1034 env->regs[R_ESP] = regs->rsp; 1035 env->eip = regs->rip; 1036 #else 1037 env->regs[R_EAX] = regs->eax; 1038 env->regs[R_EBX] = regs->ebx; 1039 env->regs[R_ECX] = regs->ecx; 1040 env->regs[R_EDX] = regs->edx; 1041 env->regs[R_ESI] = regs->esi; 1042 env->regs[R_EDI] = regs->edi; 1043 env->regs[R_EBP] = regs->ebp; 1044 env->regs[R_ESP] = regs->esp; 1045 env->eip = regs->eip; 1046 #endif 1047 1048 /* linux interrupt setup */ 1049 #ifndef TARGET_ABI32 1050 env->idt.limit = 511; 1051 #else 1052 env->idt.limit = 255; 1053 #endif 1054 env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1), 1055 PROT_READ|PROT_WRITE, 1056 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); 1057 idt_table = g2h(env->idt.base); 1058 set_idt(0, 0); 1059 set_idt(1, 0); 1060 set_idt(2, 0); 1061 set_idt(3, 3); 1062 set_idt(4, 3); 1063 set_idt(5, 0); 1064 set_idt(6, 0); 1065 set_idt(7, 0); 1066 set_idt(8, 0); 1067 set_idt(9, 0); 1068 set_idt(10, 0); 1069 set_idt(11, 0); 1070 set_idt(12, 0); 1071 set_idt(13, 0); 1072 set_idt(14, 0); 1073 set_idt(15, 0); 1074 set_idt(16, 0); 1075 set_idt(17, 0); 1076 set_idt(18, 0); 1077 set_idt(19, 0); 1078 set_idt(0x80, 3); 1079 1080 /* linux segment setup */ 1081 { 1082 uint64_t *gdt_table; 1083 env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES, 1084 PROT_READ|PROT_WRITE, 1085 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); 1086 env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1; 1087 gdt_table = g2h(env->gdt.base); 1088 #ifdef TARGET_ABI32 1089 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff, 1090 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 1091 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT)); 1092 #else 1093 /* 64 bit code segment */ 1094 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff, 1095 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 1096 DESC_L_MASK | 1097 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT)); 1098 #endif 1099 write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff, 1100 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 1101 (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT)); 1102 } 1103 1104 cpu_x86_load_seg(env, R_CS, __USER_CS); 1105 cpu_x86_load_seg(env, R_SS, __USER_DS); 1106 #ifdef TARGET_ABI32 1107 cpu_x86_load_seg(env, R_DS, __USER_DS); 1108 cpu_x86_load_seg(env, R_ES, __USER_DS); 1109 cpu_x86_load_seg(env, R_FS, __USER_DS); 1110 cpu_x86_load_seg(env, R_GS, __USER_DS); 1111 /* This hack makes Wine work... */ 1112 env->segs[R_FS].selector = 0; 1113 #else 1114 cpu_x86_load_seg(env, R_DS, 0); 1115 cpu_x86_load_seg(env, R_ES, 0); 1116 cpu_x86_load_seg(env, R_FS, 0); 1117 cpu_x86_load_seg(env, R_GS, 0); 1118 #endif 1119 #elif defined(TARGET_SPARC) 1120 { 1121 int i; 1122 env->pc = regs->pc; 1123 env->npc = regs->npc; 1124 env->y = regs->y; 1125 for(i = 0; i < 8; i++) 1126 env->gregs[i] = regs->u_regs[i]; 1127 for(i = 0; i < 8; i++) 1128 env->regwptr[i] = regs->u_regs[i + 8]; 1129 } 1130 #else 1131 #error unsupported target CPU 1132 #endif 1133 1134 if (gdbstub_port) { 1135 gdbserver_start (gdbstub_port); 1136 gdb_handlesig(env, 0); 1137 } 1138 cpu_loop(env); 1139 /* never exits */ 1140 return 0; 1141 } 1142