1 /* 2 * qemu user main 3 * 4 * Copyright (c) 2003-2008 Fabrice Bellard 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, see <http://www.gnu.org/licenses/>. 18 */ 19 #include <stdlib.h> 20 #include <stdio.h> 21 #include <stdarg.h> 22 #include <string.h> 23 #include <errno.h> 24 #include <unistd.h> 25 #include <machine/trap.h> 26 #include <sys/types.h> 27 #include <sys/mman.h> 28 29 #include "qemu.h" 30 #include "qemu-common.h" 31 /* For tb_lock */ 32 #include "cpu.h" 33 #include "tcg.h" 34 #include "qemu/timer.h" 35 #include "qemu/envlist.h" 36 37 int singlestep; 38 #if defined(CONFIG_USE_GUEST_BASE) 39 unsigned long mmap_min_addr; 40 unsigned long guest_base; 41 int have_guest_base; 42 unsigned long reserved_va; 43 #endif 44 45 static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX; 46 const char *qemu_uname_release = CONFIG_UNAME_RELEASE; 47 extern char **environ; 48 enum BSDType bsd_type; 49 50 /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so 51 we allocate a bigger stack. Need a better solution, for example 52 by remapping the process stack directly at the right place */ 53 unsigned long x86_stack_size = 512 * 1024; 54 55 void gemu_log(const char *fmt, ...) 56 { 57 va_list ap; 58 59 va_start(ap, fmt); 60 vfprintf(stderr, fmt, ap); 61 va_end(ap); 62 } 63 64 #if defined(TARGET_I386) 65 int cpu_get_pic_interrupt(CPUX86State *env) 66 { 67 return -1; 68 } 69 #endif 70 71 /* These are no-ops because we are not threadsafe. */ 72 static inline void cpu_exec_start(CPUArchState *env) 73 { 74 } 75 76 static inline void cpu_exec_end(CPUArchState *env) 77 { 78 } 79 80 static inline void start_exclusive(void) 81 { 82 } 83 84 static inline void end_exclusive(void) 85 { 86 } 87 88 void fork_start(void) 89 { 90 } 91 92 void fork_end(int child) 93 { 94 if (child) { 95 gdbserver_fork(thread_env); 96 } 97 } 98 99 void cpu_list_lock(void) 100 { 101 } 102 103 void cpu_list_unlock(void) 104 { 105 } 106 107 #ifdef TARGET_I386 108 /***********************************************************/ 109 /* CPUX86 core interface */ 110 111 void cpu_smm_update(CPUX86State *env) 112 { 113 } 114 115 uint64_t cpu_get_tsc(CPUX86State *env) 116 { 117 return cpu_get_real_ticks(); 118 } 119 120 static void write_dt(void *ptr, unsigned long addr, unsigned long limit, 121 int flags) 122 { 123 unsigned int e1, e2; 124 uint32_t *p; 125 e1 = (addr << 16) | (limit & 0xffff); 126 e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000); 127 e2 |= flags; 128 p = ptr; 129 p[0] = tswap32(e1); 130 p[1] = tswap32(e2); 131 } 132 133 static uint64_t *idt_table; 134 #ifdef TARGET_X86_64 135 static void set_gate64(void *ptr, unsigned int type, unsigned int dpl, 136 uint64_t addr, unsigned int sel) 137 { 138 uint32_t *p, e1, e2; 139 e1 = (addr & 0xffff) | (sel << 16); 140 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8); 141 p = ptr; 142 p[0] = tswap32(e1); 143 p[1] = tswap32(e2); 144 p[2] = tswap32(addr >> 32); 145 p[3] = 0; 146 } 147 /* only dpl matters as we do only user space emulation */ 148 static void set_idt(int n, unsigned int dpl) 149 { 150 set_gate64(idt_table + n * 2, 0, dpl, 0, 0); 151 } 152 #else 153 static void set_gate(void *ptr, unsigned int type, unsigned int dpl, 154 uint32_t addr, unsigned int sel) 155 { 156 uint32_t *p, e1, e2; 157 e1 = (addr & 0xffff) | (sel << 16); 158 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8); 159 p = ptr; 160 p[0] = tswap32(e1); 161 p[1] = tswap32(e2); 162 } 163 164 /* only dpl matters as we do only user space emulation */ 165 static void set_idt(int n, unsigned int dpl) 166 { 167 set_gate(idt_table + n, 0, dpl, 0, 0); 168 } 169 #endif 170 171 void cpu_loop(CPUX86State *env) 172 { 173 int trapnr; 174 abi_ulong pc; 175 //target_siginfo_t info; 176 177 for(;;) { 178 trapnr = cpu_x86_exec(env); 179 switch(trapnr) { 180 case 0x80: 181 /* syscall from int $0x80 */ 182 if (bsd_type == target_freebsd) { 183 abi_ulong params = (abi_ulong) env->regs[R_ESP] + 184 sizeof(int32_t); 185 int32_t syscall_nr = env->regs[R_EAX]; 186 int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8; 187 188 if (syscall_nr == TARGET_FREEBSD_NR_syscall) { 189 get_user_s32(syscall_nr, params); 190 params += sizeof(int32_t); 191 } else if (syscall_nr == TARGET_FREEBSD_NR___syscall) { 192 get_user_s32(syscall_nr, params); 193 params += sizeof(int64_t); 194 } 195 get_user_s32(arg1, params); 196 params += sizeof(int32_t); 197 get_user_s32(arg2, params); 198 params += sizeof(int32_t); 199 get_user_s32(arg3, params); 200 params += sizeof(int32_t); 201 get_user_s32(arg4, params); 202 params += sizeof(int32_t); 203 get_user_s32(arg5, params); 204 params += sizeof(int32_t); 205 get_user_s32(arg6, params); 206 params += sizeof(int32_t); 207 get_user_s32(arg7, params); 208 params += sizeof(int32_t); 209 get_user_s32(arg8, params); 210 env->regs[R_EAX] = do_freebsd_syscall(env, 211 syscall_nr, 212 arg1, 213 arg2, 214 arg3, 215 arg4, 216 arg5, 217 arg6, 218 arg7, 219 arg8); 220 } else { //if (bsd_type == target_openbsd) 221 env->regs[R_EAX] = do_openbsd_syscall(env, 222 env->regs[R_EAX], 223 env->regs[R_EBX], 224 env->regs[R_ECX], 225 env->regs[R_EDX], 226 env->regs[R_ESI], 227 env->regs[R_EDI], 228 env->regs[R_EBP]); 229 } 230 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) { 231 env->regs[R_EAX] = -env->regs[R_EAX]; 232 env->eflags |= CC_C; 233 } else { 234 env->eflags &= ~CC_C; 235 } 236 break; 237 #ifndef TARGET_ABI32 238 case EXCP_SYSCALL: 239 /* syscall from syscall instruction */ 240 if (bsd_type == target_freebsd) 241 env->regs[R_EAX] = do_freebsd_syscall(env, 242 env->regs[R_EAX], 243 env->regs[R_EDI], 244 env->regs[R_ESI], 245 env->regs[R_EDX], 246 env->regs[R_ECX], 247 env->regs[8], 248 env->regs[9], 0, 0); 249 else { //if (bsd_type == target_openbsd) 250 env->regs[R_EAX] = do_openbsd_syscall(env, 251 env->regs[R_EAX], 252 env->regs[R_EDI], 253 env->regs[R_ESI], 254 env->regs[R_EDX], 255 env->regs[10], 256 env->regs[8], 257 env->regs[9]); 258 } 259 env->eip = env->exception_next_eip; 260 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) { 261 env->regs[R_EAX] = -env->regs[R_EAX]; 262 env->eflags |= CC_C; 263 } else { 264 env->eflags &= ~CC_C; 265 } 266 break; 267 #endif 268 #if 0 269 case EXCP0B_NOSEG: 270 case EXCP0C_STACK: 271 info.si_signo = SIGBUS; 272 info.si_errno = 0; 273 info.si_code = TARGET_SI_KERNEL; 274 info._sifields._sigfault._addr = 0; 275 queue_signal(env, info.si_signo, &info); 276 break; 277 case EXCP0D_GPF: 278 /* XXX: potential problem if ABI32 */ 279 #ifndef TARGET_X86_64 280 if (env->eflags & VM_MASK) { 281 handle_vm86_fault(env); 282 } else 283 #endif 284 { 285 info.si_signo = SIGSEGV; 286 info.si_errno = 0; 287 info.si_code = TARGET_SI_KERNEL; 288 info._sifields._sigfault._addr = 0; 289 queue_signal(env, info.si_signo, &info); 290 } 291 break; 292 case EXCP0E_PAGE: 293 info.si_signo = SIGSEGV; 294 info.si_errno = 0; 295 if (!(env->error_code & 1)) 296 info.si_code = TARGET_SEGV_MAPERR; 297 else 298 info.si_code = TARGET_SEGV_ACCERR; 299 info._sifields._sigfault._addr = env->cr[2]; 300 queue_signal(env, info.si_signo, &info); 301 break; 302 case EXCP00_DIVZ: 303 #ifndef TARGET_X86_64 304 if (env->eflags & VM_MASK) { 305 handle_vm86_trap(env, trapnr); 306 } else 307 #endif 308 { 309 /* division by zero */ 310 info.si_signo = SIGFPE; 311 info.si_errno = 0; 312 info.si_code = TARGET_FPE_INTDIV; 313 info._sifields._sigfault._addr = env->eip; 314 queue_signal(env, info.si_signo, &info); 315 } 316 break; 317 case EXCP01_DB: 318 case EXCP03_INT3: 319 #ifndef TARGET_X86_64 320 if (env->eflags & VM_MASK) { 321 handle_vm86_trap(env, trapnr); 322 } else 323 #endif 324 { 325 info.si_signo = SIGTRAP; 326 info.si_errno = 0; 327 if (trapnr == EXCP01_DB) { 328 info.si_code = TARGET_TRAP_BRKPT; 329 info._sifields._sigfault._addr = env->eip; 330 } else { 331 info.si_code = TARGET_SI_KERNEL; 332 info._sifields._sigfault._addr = 0; 333 } 334 queue_signal(env, info.si_signo, &info); 335 } 336 break; 337 case EXCP04_INTO: 338 case EXCP05_BOUND: 339 #ifndef TARGET_X86_64 340 if (env->eflags & VM_MASK) { 341 handle_vm86_trap(env, trapnr); 342 } else 343 #endif 344 { 345 info.si_signo = SIGSEGV; 346 info.si_errno = 0; 347 info.si_code = TARGET_SI_KERNEL; 348 info._sifields._sigfault._addr = 0; 349 queue_signal(env, info.si_signo, &info); 350 } 351 break; 352 case EXCP06_ILLOP: 353 info.si_signo = SIGILL; 354 info.si_errno = 0; 355 info.si_code = TARGET_ILL_ILLOPN; 356 info._sifields._sigfault._addr = env->eip; 357 queue_signal(env, info.si_signo, &info); 358 break; 359 #endif 360 case EXCP_INTERRUPT: 361 /* just indicate that signals should be handled asap */ 362 break; 363 #if 0 364 case EXCP_DEBUG: 365 { 366 int sig; 367 368 sig = gdb_handlesig (env, TARGET_SIGTRAP); 369 if (sig) 370 { 371 info.si_signo = sig; 372 info.si_errno = 0; 373 info.si_code = TARGET_TRAP_BRKPT; 374 queue_signal(env, info.si_signo, &info); 375 } 376 } 377 break; 378 #endif 379 default: 380 pc = env->segs[R_CS].base + env->eip; 381 fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n", 382 (long)pc, trapnr); 383 abort(); 384 } 385 process_pending_signals(env); 386 } 387 } 388 #endif 389 390 #ifdef TARGET_SPARC 391 #define SPARC64_STACK_BIAS 2047 392 393 //#define DEBUG_WIN 394 /* WARNING: dealing with register windows _is_ complicated. More info 395 can be found at http://www.sics.se/~psm/sparcstack.html */ 396 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index) 397 { 398 index = (index + cwp * 16) % (16 * env->nwindows); 399 /* wrap handling : if cwp is on the last window, then we use the 400 registers 'after' the end */ 401 if (index < 8 && env->cwp == env->nwindows - 1) 402 index += 16 * env->nwindows; 403 return index; 404 } 405 406 /* save the register window 'cwp1' */ 407 static inline void save_window_offset(CPUSPARCState *env, int cwp1) 408 { 409 unsigned int i; 410 abi_ulong sp_ptr; 411 412 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)]; 413 #ifdef TARGET_SPARC64 414 if (sp_ptr & 3) 415 sp_ptr += SPARC64_STACK_BIAS; 416 #endif 417 #if defined(DEBUG_WIN) 418 printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n", 419 sp_ptr, cwp1); 420 #endif 421 for(i = 0; i < 16; i++) { 422 /* FIXME - what to do if put_user() fails? */ 423 put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr); 424 sp_ptr += sizeof(abi_ulong); 425 } 426 } 427 428 static void save_window(CPUSPARCState *env) 429 { 430 #ifndef TARGET_SPARC64 431 unsigned int new_wim; 432 new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) & 433 ((1LL << env->nwindows) - 1); 434 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2)); 435 env->wim = new_wim; 436 #else 437 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2)); 438 env->cansave++; 439 env->canrestore--; 440 #endif 441 } 442 443 static void restore_window(CPUSPARCState *env) 444 { 445 #ifndef TARGET_SPARC64 446 unsigned int new_wim; 447 #endif 448 unsigned int i, cwp1; 449 abi_ulong sp_ptr; 450 451 #ifndef TARGET_SPARC64 452 new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) & 453 ((1LL << env->nwindows) - 1); 454 #endif 455 456 /* restore the invalid window */ 457 cwp1 = cpu_cwp_inc(env, env->cwp + 1); 458 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)]; 459 #ifdef TARGET_SPARC64 460 if (sp_ptr & 3) 461 sp_ptr += SPARC64_STACK_BIAS; 462 #endif 463 #if defined(DEBUG_WIN) 464 printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n", 465 sp_ptr, cwp1); 466 #endif 467 for(i = 0; i < 16; i++) { 468 /* FIXME - what to do if get_user() fails? */ 469 get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr); 470 sp_ptr += sizeof(abi_ulong); 471 } 472 #ifdef TARGET_SPARC64 473 env->canrestore++; 474 if (env->cleanwin < env->nwindows - 1) 475 env->cleanwin++; 476 env->cansave--; 477 #else 478 env->wim = new_wim; 479 #endif 480 } 481 482 static void flush_windows(CPUSPARCState *env) 483 { 484 int offset, cwp1; 485 486 offset = 1; 487 for(;;) { 488 /* if restore would invoke restore_window(), then we can stop */ 489 cwp1 = cpu_cwp_inc(env, env->cwp + offset); 490 #ifndef TARGET_SPARC64 491 if (env->wim & (1 << cwp1)) 492 break; 493 #else 494 if (env->canrestore == 0) 495 break; 496 env->cansave++; 497 env->canrestore--; 498 #endif 499 save_window_offset(env, cwp1); 500 offset++; 501 } 502 cwp1 = cpu_cwp_inc(env, env->cwp + 1); 503 #ifndef TARGET_SPARC64 504 /* set wim so that restore will reload the registers */ 505 env->wim = 1 << cwp1; 506 #endif 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, syscall_nr; 515 //target_siginfo_t info; 516 517 while (1) { 518 trapnr = cpu_sparc_exec (env); 519 520 switch (trapnr) { 521 #ifndef TARGET_SPARC64 522 case 0x80: 523 #else 524 /* FreeBSD uses 0x141 for syscalls too */ 525 case 0x141: 526 if (bsd_type != target_freebsd) 527 goto badtrap; 528 case 0x100: 529 #endif 530 syscall_nr = env->gregs[1]; 531 if (bsd_type == target_freebsd) 532 ret = do_freebsd_syscall(env, syscall_nr, 533 env->regwptr[0], env->regwptr[1], 534 env->regwptr[2], env->regwptr[3], 535 env->regwptr[4], env->regwptr[5], 0, 0); 536 else if (bsd_type == target_netbsd) 537 ret = do_netbsd_syscall(env, syscall_nr, 538 env->regwptr[0], env->regwptr[1], 539 env->regwptr[2], env->regwptr[3], 540 env->regwptr[4], env->regwptr[5]); 541 else { //if (bsd_type == target_openbsd) 542 #if defined(TARGET_SPARC64) 543 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG | 544 TARGET_OPENBSD_SYSCALL_G2RFLAG); 545 #endif 546 ret = do_openbsd_syscall(env, syscall_nr, 547 env->regwptr[0], env->regwptr[1], 548 env->regwptr[2], env->regwptr[3], 549 env->regwptr[4], env->regwptr[5]); 550 } 551 if ((unsigned int)ret >= (unsigned int)(-515)) { 552 ret = -ret; 553 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) 554 env->xcc |= PSR_CARRY; 555 #else 556 env->psr |= PSR_CARRY; 557 #endif 558 } else { 559 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) 560 env->xcc &= ~PSR_CARRY; 561 #else 562 env->psr &= ~PSR_CARRY; 563 #endif 564 } 565 env->regwptr[0] = ret; 566 /* next instruction */ 567 #if defined(TARGET_SPARC64) 568 if (bsd_type == target_openbsd && 569 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) { 570 env->pc = env->gregs[2]; 571 env->npc = env->pc + 4; 572 } else if (bsd_type == target_openbsd && 573 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) { 574 env->pc = env->gregs[7]; 575 env->npc = env->pc + 4; 576 } else { 577 env->pc = env->npc; 578 env->npc = env->npc + 4; 579 } 580 #else 581 env->pc = env->npc; 582 env->npc = env->npc + 4; 583 #endif 584 break; 585 case 0x83: /* flush windows */ 586 #ifdef TARGET_ABI32 587 case 0x103: 588 #endif 589 flush_windows(env); 590 /* next instruction */ 591 env->pc = env->npc; 592 env->npc = env->npc + 4; 593 break; 594 #ifndef TARGET_SPARC64 595 case TT_WIN_OVF: /* window overflow */ 596 save_window(env); 597 break; 598 case TT_WIN_UNF: /* window underflow */ 599 restore_window(env); 600 break; 601 case TT_TFAULT: 602 case TT_DFAULT: 603 #if 0 604 { 605 info.si_signo = SIGSEGV; 606 info.si_errno = 0; 607 /* XXX: check env->error_code */ 608 info.si_code = TARGET_SEGV_MAPERR; 609 info._sifields._sigfault._addr = env->mmuregs[4]; 610 queue_signal(env, info.si_signo, &info); 611 } 612 #endif 613 break; 614 #else 615 case TT_SPILL: /* window overflow */ 616 save_window(env); 617 break; 618 case TT_FILL: /* window underflow */ 619 restore_window(env); 620 break; 621 case TT_TFAULT: 622 case TT_DFAULT: 623 #if 0 624 { 625 info.si_signo = SIGSEGV; 626 info.si_errno = 0; 627 /* XXX: check env->error_code */ 628 info.si_code = TARGET_SEGV_MAPERR; 629 if (trapnr == TT_DFAULT) 630 info._sifields._sigfault._addr = env->dmmuregs[4]; 631 else 632 info._sifields._sigfault._addr = env->tsptr->tpc; 633 //queue_signal(env, info.si_signo, &info); 634 } 635 #endif 636 break; 637 #endif 638 case EXCP_INTERRUPT: 639 /* just indicate that signals should be handled asap */ 640 break; 641 case EXCP_DEBUG: 642 { 643 int sig; 644 645 sig = gdb_handlesig (env, TARGET_SIGTRAP); 646 #if 0 647 if (sig) 648 { 649 info.si_signo = sig; 650 info.si_errno = 0; 651 info.si_code = TARGET_TRAP_BRKPT; 652 //queue_signal(env, info.si_signo, &info); 653 } 654 #endif 655 } 656 break; 657 default: 658 #ifdef TARGET_SPARC64 659 badtrap: 660 #endif 661 printf ("Unhandled trap: 0x%x\n", trapnr); 662 cpu_dump_state(env, stderr, fprintf, 0); 663 exit (1); 664 } 665 process_pending_signals (env); 666 } 667 } 668 669 #endif 670 671 static void usage(void) 672 { 673 printf("qemu-" TARGET_ARCH " version " QEMU_VERSION ", Copyright (c) 2003-2008 Fabrice Bellard\n" 674 "usage: qemu-" TARGET_ARCH " [options] program [arguments...]\n" 675 "BSD CPU emulator (compiled for %s emulation)\n" 676 "\n" 677 "Standard options:\n" 678 "-h print this help\n" 679 "-g port wait gdb connection to port\n" 680 "-L path set the elf interpreter prefix (default=%s)\n" 681 "-s size set the stack size in bytes (default=%ld)\n" 682 "-cpu model select CPU (-cpu help for list)\n" 683 "-drop-ld-preload drop LD_PRELOAD for target process\n" 684 "-E var=value sets/modifies targets environment variable(s)\n" 685 "-U var unsets targets environment variable(s)\n" 686 #if defined(CONFIG_USE_GUEST_BASE) 687 "-B address set guest_base address to address\n" 688 #endif 689 "-bsd type select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n" 690 "\n" 691 "Debug options:\n" 692 "-d item1[,...] enable logging of specified items\n" 693 " (use '-d help' for a list of log items)\n" 694 "-D logfile write logs to 'logfile' (default stderr)\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 exit(1); 713 } 714 715 THREAD CPUArchState *thread_env; 716 717 /* Assumes contents are already zeroed. */ 718 void init_task_state(TaskState *ts) 719 { 720 int i; 721 722 ts->used = 1; 723 ts->first_free = ts->sigqueue_table; 724 for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) { 725 ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1]; 726 } 727 ts->sigqueue_table[i].next = NULL; 728 } 729 730 int main(int argc, char **argv) 731 { 732 const char *filename; 733 const char *cpu_model; 734 const char *log_file = NULL; 735 const char *log_mask = NULL; 736 struct target_pt_regs regs1, *regs = ®s1; 737 struct image_info info1, *info = &info1; 738 TaskState ts1, *ts = &ts1; 739 CPUArchState *env; 740 int optind; 741 const char *r; 742 int gdbstub_port = 0; 743 char **target_environ, **wrk; 744 envlist_t *envlist = NULL; 745 bsd_type = target_openbsd; 746 747 if (argc <= 1) 748 usage(); 749 750 module_call_init(MODULE_INIT_QOM); 751 752 if ((envlist = envlist_create()) == NULL) { 753 (void) fprintf(stderr, "Unable to allocate envlist\n"); 754 exit(1); 755 } 756 757 /* add current environment into the list */ 758 for (wrk = environ; *wrk != NULL; wrk++) { 759 (void) envlist_setenv(envlist, *wrk); 760 } 761 762 cpu_model = NULL; 763 #if defined(cpudef_setup) 764 cpudef_setup(); /* parse cpu definitions in target config file (TBD) */ 765 #endif 766 767 optind = 1; 768 for(;;) { 769 if (optind >= argc) 770 break; 771 r = argv[optind]; 772 if (r[0] != '-') 773 break; 774 optind++; 775 r++; 776 if (!strcmp(r, "-")) { 777 break; 778 } else if (!strcmp(r, "d")) { 779 if (optind >= argc) { 780 break; 781 } 782 log_mask = argv[optind++]; 783 } else if (!strcmp(r, "D")) { 784 if (optind >= argc) { 785 break; 786 } 787 log_file = argv[optind++]; 788 } else if (!strcmp(r, "E")) { 789 r = argv[optind++]; 790 if (envlist_setenv(envlist, r) != 0) 791 usage(); 792 } else if (!strcmp(r, "ignore-environment")) { 793 envlist_free(envlist); 794 if ((envlist = envlist_create()) == NULL) { 795 (void) fprintf(stderr, "Unable to allocate envlist\n"); 796 exit(1); 797 } 798 } else if (!strcmp(r, "U")) { 799 r = argv[optind++]; 800 if (envlist_unsetenv(envlist, r) != 0) 801 usage(); 802 } else if (!strcmp(r, "s")) { 803 r = argv[optind++]; 804 x86_stack_size = strtol(r, (char **)&r, 0); 805 if (x86_stack_size <= 0) 806 usage(); 807 if (*r == 'M') 808 x86_stack_size *= 1024 * 1024; 809 else if (*r == 'k' || *r == 'K') 810 x86_stack_size *= 1024; 811 } else if (!strcmp(r, "L")) { 812 interp_prefix = argv[optind++]; 813 } else if (!strcmp(r, "p")) { 814 qemu_host_page_size = atoi(argv[optind++]); 815 if (qemu_host_page_size == 0 || 816 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) { 817 fprintf(stderr, "page size must be a power of two\n"); 818 exit(1); 819 } 820 } else if (!strcmp(r, "g")) { 821 gdbstub_port = atoi(argv[optind++]); 822 } else if (!strcmp(r, "r")) { 823 qemu_uname_release = argv[optind++]; 824 } else if (!strcmp(r, "cpu")) { 825 cpu_model = argv[optind++]; 826 if (is_help_option(cpu_model)) { 827 /* XXX: implement xxx_cpu_list for targets that still miss it */ 828 #if defined(cpu_list) 829 cpu_list(stdout, &fprintf); 830 #endif 831 exit(1); 832 } 833 #if defined(CONFIG_USE_GUEST_BASE) 834 } else if (!strcmp(r, "B")) { 835 guest_base = strtol(argv[optind++], NULL, 0); 836 have_guest_base = 1; 837 #endif 838 } else if (!strcmp(r, "drop-ld-preload")) { 839 (void) envlist_unsetenv(envlist, "LD_PRELOAD"); 840 } else if (!strcmp(r, "bsd")) { 841 if (!strcasecmp(argv[optind], "freebsd")) { 842 bsd_type = target_freebsd; 843 } else if (!strcasecmp(argv[optind], "netbsd")) { 844 bsd_type = target_netbsd; 845 } else if (!strcasecmp(argv[optind], "openbsd")) { 846 bsd_type = target_openbsd; 847 } else { 848 usage(); 849 } 850 optind++; 851 } else if (!strcmp(r, "singlestep")) { 852 singlestep = 1; 853 } else if (!strcmp(r, "strace")) { 854 do_strace = 1; 855 } else 856 { 857 usage(); 858 } 859 } 860 861 /* init debug */ 862 qemu_set_log_filename(log_file); 863 if (log_mask) { 864 int mask; 865 866 mask = qemu_str_to_log_mask(log_mask); 867 if (!mask) { 868 qemu_print_log_usage(stdout); 869 exit(1); 870 } 871 qemu_set_log(mask); 872 } 873 874 if (optind >= argc) { 875 usage(); 876 } 877 filename = argv[optind]; 878 879 /* Zero out regs */ 880 memset(regs, 0, sizeof(struct target_pt_regs)); 881 882 /* Zero out image_info */ 883 memset(info, 0, sizeof(struct image_info)); 884 885 /* Scan interp_prefix dir for replacement files. */ 886 init_paths(interp_prefix); 887 888 if (cpu_model == NULL) { 889 #if defined(TARGET_I386) 890 #ifdef TARGET_X86_64 891 cpu_model = "qemu64"; 892 #else 893 cpu_model = "qemu32"; 894 #endif 895 #elif defined(TARGET_SPARC) 896 #ifdef TARGET_SPARC64 897 cpu_model = "TI UltraSparc II"; 898 #else 899 cpu_model = "Fujitsu MB86904"; 900 #endif 901 #else 902 cpu_model = "any"; 903 #endif 904 } 905 tcg_exec_init(0); 906 cpu_exec_init_all(); 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_SPARC) || defined(TARGET_PPC) 915 cpu_reset(ENV_GET_CPU(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