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 #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 unsigned long reserved_va; 45 #endif 46 47 static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX; 48 const char *qemu_uname_release = CONFIG_UNAME_RELEASE; 49 extern char **environ; 50 enum BSDType bsd_type; 51 52 /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so 53 we allocate a bigger stack. Need a better solution, for example 54 by remapping the process stack directly at the right place */ 55 unsigned long x86_stack_size = 512 * 1024; 56 57 void gemu_log(const char *fmt, ...) 58 { 59 va_list ap; 60 61 va_start(ap, fmt); 62 vfprintf(stderr, fmt, ap); 63 va_end(ap); 64 } 65 66 #if defined(TARGET_I386) 67 int cpu_get_pic_interrupt(CPUX86State *env) 68 { 69 return -1; 70 } 71 #endif 72 73 /* These are no-ops because we are not threadsafe. */ 74 static inline void cpu_exec_start(CPUArchState *env) 75 { 76 } 77 78 static inline void cpu_exec_end(CPUArchState *env) 79 { 80 } 81 82 static inline void start_exclusive(void) 83 { 84 } 85 86 static inline void end_exclusive(void) 87 { 88 } 89 90 void fork_start(void) 91 { 92 } 93 94 void fork_end(int child) 95 { 96 if (child) { 97 gdbserver_fork(thread_env); 98 } 99 } 100 101 void cpu_list_lock(void) 102 { 103 } 104 105 void cpu_list_unlock(void) 106 { 107 } 108 109 #ifdef TARGET_I386 110 /***********************************************************/ 111 /* CPUX86 core interface */ 112 113 void cpu_smm_update(CPUX86State *env) 114 { 115 } 116 117 uint64_t cpu_get_tsc(CPUX86State *env) 118 { 119 return cpu_get_real_ticks(); 120 } 121 122 static void write_dt(void *ptr, unsigned long addr, unsigned long limit, 123 int flags) 124 { 125 unsigned int e1, e2; 126 uint32_t *p; 127 e1 = (addr << 16) | (limit & 0xffff); 128 e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000); 129 e2 |= flags; 130 p = ptr; 131 p[0] = tswap32(e1); 132 p[1] = tswap32(e2); 133 } 134 135 static uint64_t *idt_table; 136 #ifdef TARGET_X86_64 137 static void set_gate64(void *ptr, unsigned int type, unsigned int dpl, 138 uint64_t addr, unsigned int sel) 139 { 140 uint32_t *p, e1, e2; 141 e1 = (addr & 0xffff) | (sel << 16); 142 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8); 143 p = ptr; 144 p[0] = tswap32(e1); 145 p[1] = tswap32(e2); 146 p[2] = tswap32(addr >> 32); 147 p[3] = 0; 148 } 149 /* only dpl matters as we do only user space emulation */ 150 static void set_idt(int n, unsigned int dpl) 151 { 152 set_gate64(idt_table + n * 2, 0, dpl, 0, 0); 153 } 154 #else 155 static void set_gate(void *ptr, unsigned int type, unsigned int dpl, 156 uint32_t addr, unsigned int sel) 157 { 158 uint32_t *p, e1, e2; 159 e1 = (addr & 0xffff) | (sel << 16); 160 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8); 161 p = ptr; 162 p[0] = tswap32(e1); 163 p[1] = tswap32(e2); 164 } 165 166 /* only dpl matters as we do only user space emulation */ 167 static void set_idt(int n, unsigned int dpl) 168 { 169 set_gate(idt_table + n, 0, dpl, 0, 0); 170 } 171 #endif 172 173 void cpu_loop(CPUX86State *env) 174 { 175 int trapnr; 176 abi_ulong pc; 177 //target_siginfo_t info; 178 179 for(;;) { 180 trapnr = cpu_x86_exec(env); 181 switch(trapnr) { 182 case 0x80: 183 /* syscall from int $0x80 */ 184 if (bsd_type == target_freebsd) { 185 abi_ulong params = (abi_ulong) env->regs[R_ESP] + 186 sizeof(int32_t); 187 int32_t syscall_nr = env->regs[R_EAX]; 188 int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8; 189 190 if (syscall_nr == TARGET_FREEBSD_NR_syscall) { 191 get_user_s32(syscall_nr, params); 192 params += sizeof(int32_t); 193 } else if (syscall_nr == TARGET_FREEBSD_NR___syscall) { 194 get_user_s32(syscall_nr, params); 195 params += sizeof(int64_t); 196 } 197 get_user_s32(arg1, params); 198 params += sizeof(int32_t); 199 get_user_s32(arg2, params); 200 params += sizeof(int32_t); 201 get_user_s32(arg3, params); 202 params += sizeof(int32_t); 203 get_user_s32(arg4, params); 204 params += sizeof(int32_t); 205 get_user_s32(arg5, params); 206 params += sizeof(int32_t); 207 get_user_s32(arg6, params); 208 params += sizeof(int32_t); 209 get_user_s32(arg7, params); 210 params += sizeof(int32_t); 211 get_user_s32(arg8, params); 212 env->regs[R_EAX] = do_freebsd_syscall(env, 213 syscall_nr, 214 arg1, 215 arg2, 216 arg3, 217 arg4, 218 arg5, 219 arg6, 220 arg7, 221 arg8); 222 } else { //if (bsd_type == target_openbsd) 223 env->regs[R_EAX] = do_openbsd_syscall(env, 224 env->regs[R_EAX], 225 env->regs[R_EBX], 226 env->regs[R_ECX], 227 env->regs[R_EDX], 228 env->regs[R_ESI], 229 env->regs[R_EDI], 230 env->regs[R_EBP]); 231 } 232 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) { 233 env->regs[R_EAX] = -env->regs[R_EAX]; 234 env->eflags |= CC_C; 235 } else { 236 env->eflags &= ~CC_C; 237 } 238 break; 239 #ifndef TARGET_ABI32 240 case EXCP_SYSCALL: 241 /* syscall from syscall instruction */ 242 if (bsd_type == target_freebsd) 243 env->regs[R_EAX] = do_freebsd_syscall(env, 244 env->regs[R_EAX], 245 env->regs[R_EDI], 246 env->regs[R_ESI], 247 env->regs[R_EDX], 248 env->regs[R_ECX], 249 env->regs[8], 250 env->regs[9], 0, 0); 251 else { //if (bsd_type == target_openbsd) 252 env->regs[R_EAX] = do_openbsd_syscall(env, 253 env->regs[R_EAX], 254 env->regs[R_EDI], 255 env->regs[R_ESI], 256 env->regs[R_EDX], 257 env->regs[10], 258 env->regs[8], 259 env->regs[9]); 260 } 261 env->eip = env->exception_next_eip; 262 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) { 263 env->regs[R_EAX] = -env->regs[R_EAX]; 264 env->eflags |= CC_C; 265 } else { 266 env->eflags &= ~CC_C; 267 } 268 break; 269 #endif 270 #if 0 271 case EXCP0B_NOSEG: 272 case EXCP0C_STACK: 273 info.si_signo = SIGBUS; 274 info.si_errno = 0; 275 info.si_code = TARGET_SI_KERNEL; 276 info._sifields._sigfault._addr = 0; 277 queue_signal(env, info.si_signo, &info); 278 break; 279 case EXCP0D_GPF: 280 /* XXX: potential problem if ABI32 */ 281 #ifndef TARGET_X86_64 282 if (env->eflags & VM_MASK) { 283 handle_vm86_fault(env); 284 } else 285 #endif 286 { 287 info.si_signo = SIGSEGV; 288 info.si_errno = 0; 289 info.si_code = TARGET_SI_KERNEL; 290 info._sifields._sigfault._addr = 0; 291 queue_signal(env, info.si_signo, &info); 292 } 293 break; 294 case EXCP0E_PAGE: 295 info.si_signo = SIGSEGV; 296 info.si_errno = 0; 297 if (!(env->error_code & 1)) 298 info.si_code = TARGET_SEGV_MAPERR; 299 else 300 info.si_code = TARGET_SEGV_ACCERR; 301 info._sifields._sigfault._addr = env->cr[2]; 302 queue_signal(env, info.si_signo, &info); 303 break; 304 case EXCP00_DIVZ: 305 #ifndef TARGET_X86_64 306 if (env->eflags & VM_MASK) { 307 handle_vm86_trap(env, trapnr); 308 } else 309 #endif 310 { 311 /* division by zero */ 312 info.si_signo = SIGFPE; 313 info.si_errno = 0; 314 info.si_code = TARGET_FPE_INTDIV; 315 info._sifields._sigfault._addr = env->eip; 316 queue_signal(env, info.si_signo, &info); 317 } 318 break; 319 case EXCP01_DB: 320 case EXCP03_INT3: 321 #ifndef TARGET_X86_64 322 if (env->eflags & VM_MASK) { 323 handle_vm86_trap(env, trapnr); 324 } else 325 #endif 326 { 327 info.si_signo = SIGTRAP; 328 info.si_errno = 0; 329 if (trapnr == EXCP01_DB) { 330 info.si_code = TARGET_TRAP_BRKPT; 331 info._sifields._sigfault._addr = env->eip; 332 } else { 333 info.si_code = TARGET_SI_KERNEL; 334 info._sifields._sigfault._addr = 0; 335 } 336 queue_signal(env, info.si_signo, &info); 337 } 338 break; 339 case EXCP04_INTO: 340 case EXCP05_BOUND: 341 #ifndef TARGET_X86_64 342 if (env->eflags & VM_MASK) { 343 handle_vm86_trap(env, trapnr); 344 } else 345 #endif 346 { 347 info.si_signo = SIGSEGV; 348 info.si_errno = 0; 349 info.si_code = TARGET_SI_KERNEL; 350 info._sifields._sigfault._addr = 0; 351 queue_signal(env, info.si_signo, &info); 352 } 353 break; 354 case EXCP06_ILLOP: 355 info.si_signo = SIGILL; 356 info.si_errno = 0; 357 info.si_code = TARGET_ILL_ILLOPN; 358 info._sifields._sigfault._addr = env->eip; 359 queue_signal(env, info.si_signo, &info); 360 break; 361 #endif 362 case EXCP_INTERRUPT: 363 /* just indicate that signals should be handled asap */ 364 break; 365 #if 0 366 case EXCP_DEBUG: 367 { 368 int sig; 369 370 sig = gdb_handlesig (env, TARGET_SIGTRAP); 371 if (sig) 372 { 373 info.si_signo = sig; 374 info.si_errno = 0; 375 info.si_code = TARGET_TRAP_BRKPT; 376 queue_signal(env, info.si_signo, &info); 377 } 378 } 379 break; 380 #endif 381 default: 382 pc = env->segs[R_CS].base + env->eip; 383 fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n", 384 (long)pc, trapnr); 385 abort(); 386 } 387 process_pending_signals(env); 388 } 389 } 390 #endif 391 392 #ifdef TARGET_SPARC 393 #define SPARC64_STACK_BIAS 2047 394 395 //#define DEBUG_WIN 396 /* WARNING: dealing with register windows _is_ complicated. More info 397 can be found at http://www.sics.se/~psm/sparcstack.html */ 398 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index) 399 { 400 index = (index + cwp * 16) % (16 * env->nwindows); 401 /* wrap handling : if cwp is on the last window, then we use the 402 registers 'after' the end */ 403 if (index < 8 && env->cwp == env->nwindows - 1) 404 index += 16 * env->nwindows; 405 return index; 406 } 407 408 /* save the register window 'cwp1' */ 409 static inline void save_window_offset(CPUSPARCState *env, int cwp1) 410 { 411 unsigned int i; 412 abi_ulong sp_ptr; 413 414 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)]; 415 #ifdef TARGET_SPARC64 416 if (sp_ptr & 3) 417 sp_ptr += SPARC64_STACK_BIAS; 418 #endif 419 #if defined(DEBUG_WIN) 420 printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n", 421 sp_ptr, cwp1); 422 #endif 423 for(i = 0; i < 16; i++) { 424 /* FIXME - what to do if put_user() fails? */ 425 put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr); 426 sp_ptr += sizeof(abi_ulong); 427 } 428 } 429 430 static void save_window(CPUSPARCState *env) 431 { 432 #ifndef TARGET_SPARC64 433 unsigned int new_wim; 434 new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) & 435 ((1LL << env->nwindows) - 1); 436 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2)); 437 env->wim = new_wim; 438 #else 439 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2)); 440 env->cansave++; 441 env->canrestore--; 442 #endif 443 } 444 445 static void restore_window(CPUSPARCState *env) 446 { 447 #ifndef TARGET_SPARC64 448 unsigned int new_wim; 449 #endif 450 unsigned int i, cwp1; 451 abi_ulong sp_ptr; 452 453 #ifndef TARGET_SPARC64 454 new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) & 455 ((1LL << env->nwindows) - 1); 456 #endif 457 458 /* restore the invalid window */ 459 cwp1 = cpu_cwp_inc(env, env->cwp + 1); 460 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)]; 461 #ifdef TARGET_SPARC64 462 if (sp_ptr & 3) 463 sp_ptr += SPARC64_STACK_BIAS; 464 #endif 465 #if defined(DEBUG_WIN) 466 printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n", 467 sp_ptr, cwp1); 468 #endif 469 for(i = 0; i < 16; i++) { 470 /* FIXME - what to do if get_user() fails? */ 471 get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr); 472 sp_ptr += sizeof(abi_ulong); 473 } 474 #ifdef TARGET_SPARC64 475 env->canrestore++; 476 if (env->cleanwin < env->nwindows - 1) 477 env->cleanwin++; 478 env->cansave--; 479 #else 480 env->wim = new_wim; 481 #endif 482 } 483 484 static void flush_windows(CPUSPARCState *env) 485 { 486 int offset, cwp1; 487 488 offset = 1; 489 for(;;) { 490 /* if restore would invoke restore_window(), then we can stop */ 491 cwp1 = cpu_cwp_inc(env, env->cwp + offset); 492 #ifndef TARGET_SPARC64 493 if (env->wim & (1 << cwp1)) 494 break; 495 #else 496 if (env->canrestore == 0) 497 break; 498 env->cansave++; 499 env->canrestore--; 500 #endif 501 save_window_offset(env, cwp1); 502 offset++; 503 } 504 cwp1 = cpu_cwp_inc(env, env->cwp + 1); 505 #ifndef TARGET_SPARC64 506 /* set wim so that restore will reload the registers */ 507 env->wim = 1 << cwp1; 508 #endif 509 #if defined(DEBUG_WIN) 510 printf("flush_windows: nb=%d\n", offset - 1); 511 #endif 512 } 513 514 void cpu_loop(CPUSPARCState *env) 515 { 516 int trapnr, ret, syscall_nr; 517 //target_siginfo_t info; 518 519 while (1) { 520 trapnr = cpu_sparc_exec (env); 521 522 switch (trapnr) { 523 #ifndef TARGET_SPARC64 524 case 0x80: 525 #else 526 /* FreeBSD uses 0x141 for syscalls too */ 527 case 0x141: 528 if (bsd_type != target_freebsd) 529 goto badtrap; 530 case 0x100: 531 #endif 532 syscall_nr = env->gregs[1]; 533 if (bsd_type == target_freebsd) 534 ret = do_freebsd_syscall(env, syscall_nr, 535 env->regwptr[0], env->regwptr[1], 536 env->regwptr[2], env->regwptr[3], 537 env->regwptr[4], env->regwptr[5], 0, 0); 538 else if (bsd_type == target_netbsd) 539 ret = do_netbsd_syscall(env, syscall_nr, 540 env->regwptr[0], env->regwptr[1], 541 env->regwptr[2], env->regwptr[3], 542 env->regwptr[4], env->regwptr[5]); 543 else { //if (bsd_type == target_openbsd) 544 #if defined(TARGET_SPARC64) 545 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG | 546 TARGET_OPENBSD_SYSCALL_G2RFLAG); 547 #endif 548 ret = do_openbsd_syscall(env, syscall_nr, 549 env->regwptr[0], env->regwptr[1], 550 env->regwptr[2], env->regwptr[3], 551 env->regwptr[4], env->regwptr[5]); 552 } 553 if ((unsigned int)ret >= (unsigned int)(-515)) { 554 ret = -ret; 555 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) 556 env->xcc |= PSR_CARRY; 557 #else 558 env->psr |= PSR_CARRY; 559 #endif 560 } else { 561 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) 562 env->xcc &= ~PSR_CARRY; 563 #else 564 env->psr &= ~PSR_CARRY; 565 #endif 566 } 567 env->regwptr[0] = ret; 568 /* next instruction */ 569 #if defined(TARGET_SPARC64) 570 if (bsd_type == target_openbsd && 571 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) { 572 env->pc = env->gregs[2]; 573 env->npc = env->pc + 4; 574 } else if (bsd_type == target_openbsd && 575 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) { 576 env->pc = env->gregs[7]; 577 env->npc = env->pc + 4; 578 } else { 579 env->pc = env->npc; 580 env->npc = env->npc + 4; 581 } 582 #else 583 env->pc = env->npc; 584 env->npc = env->npc + 4; 585 #endif 586 break; 587 case 0x83: /* flush windows */ 588 #ifdef TARGET_ABI32 589 case 0x103: 590 #endif 591 flush_windows(env); 592 /* next instruction */ 593 env->pc = env->npc; 594 env->npc = env->npc + 4; 595 break; 596 #ifndef TARGET_SPARC64 597 case TT_WIN_OVF: /* window overflow */ 598 save_window(env); 599 break; 600 case TT_WIN_UNF: /* window underflow */ 601 restore_window(env); 602 break; 603 case TT_TFAULT: 604 case TT_DFAULT: 605 #if 0 606 { 607 info.si_signo = SIGSEGV; 608 info.si_errno = 0; 609 /* XXX: check env->error_code */ 610 info.si_code = TARGET_SEGV_MAPERR; 611 info._sifields._sigfault._addr = env->mmuregs[4]; 612 queue_signal(env, info.si_signo, &info); 613 } 614 #endif 615 break; 616 #else 617 case TT_SPILL: /* window overflow */ 618 save_window(env); 619 break; 620 case TT_FILL: /* window underflow */ 621 restore_window(env); 622 break; 623 case TT_TFAULT: 624 case TT_DFAULT: 625 #if 0 626 { 627 info.si_signo = SIGSEGV; 628 info.si_errno = 0; 629 /* XXX: check env->error_code */ 630 info.si_code = TARGET_SEGV_MAPERR; 631 if (trapnr == TT_DFAULT) 632 info._sifields._sigfault._addr = env->dmmuregs[4]; 633 else 634 info._sifields._sigfault._addr = env->tsptr->tpc; 635 //queue_signal(env, info.si_signo, &info); 636 } 637 #endif 638 break; 639 #endif 640 case EXCP_INTERRUPT: 641 /* just indicate that signals should be handled asap */ 642 break; 643 case EXCP_DEBUG: 644 { 645 int sig; 646 647 sig = gdb_handlesig (env, TARGET_SIGTRAP); 648 #if 0 649 if (sig) 650 { 651 info.si_signo = sig; 652 info.si_errno = 0; 653 info.si_code = TARGET_TRAP_BRKPT; 654 //queue_signal(env, info.si_signo, &info); 655 } 656 #endif 657 } 658 break; 659 default: 660 #ifdef TARGET_SPARC64 661 badtrap: 662 #endif 663 printf ("Unhandled trap: 0x%x\n", trapnr); 664 cpu_dump_state(env, stderr, fprintf, 0); 665 exit (1); 666 } 667 process_pending_signals (env); 668 } 669 } 670 671 #endif 672 673 static void usage(void) 674 { 675 printf("qemu-" TARGET_ARCH " version " QEMU_VERSION ", Copyright (c) 2003-2008 Fabrice Bellard\n" 676 "usage: qemu-" TARGET_ARCH " [options] program [arguments...]\n" 677 "BSD CPU emulator (compiled for %s emulation)\n" 678 "\n" 679 "Standard options:\n" 680 "-h print this help\n" 681 "-g port wait gdb connection to port\n" 682 "-L path set the elf interpreter prefix (default=%s)\n" 683 "-s size set the stack size in bytes (default=%ld)\n" 684 "-cpu model select CPU (-cpu help for list)\n" 685 "-drop-ld-preload drop LD_PRELOAD for target process\n" 686 "-E var=value sets/modifies targets environment variable(s)\n" 687 "-U var unsets targets environment variable(s)\n" 688 #if defined(CONFIG_USE_GUEST_BASE) 689 "-B address set guest_base address to address\n" 690 #endif 691 "-bsd type select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n" 692 "\n" 693 "Debug options:\n" 694 "-d options activate log (default logfile=%s)\n" 695 "-D logfile override default logfile location\n" 696 "-p pagesize set the host page size to 'pagesize'\n" 697 "-singlestep always run in singlestep mode\n" 698 "-strace log system calls\n" 699 "\n" 700 "Environment variables:\n" 701 "QEMU_STRACE Print system calls and arguments similar to the\n" 702 " 'strace' program. Enable by setting to any value.\n" 703 "You can use -E and -U options to set/unset environment variables\n" 704 "for target process. It is possible to provide several variables\n" 705 "by repeating the option. For example:\n" 706 " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n" 707 "Note that if you provide several changes to single variable\n" 708 "last change will stay in effect.\n" 709 , 710 TARGET_ARCH, 711 interp_prefix, 712 x86_stack_size, 713 DEBUG_LOGFILE); 714 exit(1); 715 } 716 717 THREAD CPUArchState *thread_env; 718 719 /* Assumes contents are already zeroed. */ 720 void init_task_state(TaskState *ts) 721 { 722 int i; 723 724 ts->used = 1; 725 ts->first_free = ts->sigqueue_table; 726 for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) { 727 ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1]; 728 } 729 ts->sigqueue_table[i].next = NULL; 730 } 731 732 int main(int argc, char **argv) 733 { 734 const char *filename; 735 const char *cpu_model; 736 const char *log_file = DEBUG_LOGFILE; 737 const char *log_mask = NULL; 738 struct target_pt_regs regs1, *regs = ®s1; 739 struct image_info info1, *info = &info1; 740 TaskState ts1, *ts = &ts1; 741 CPUArchState *env; 742 int optind; 743 const char *r; 744 int gdbstub_port = 0; 745 char **target_environ, **wrk; 746 envlist_t *envlist = NULL; 747 bsd_type = target_openbsd; 748 749 if (argc <= 1) 750 usage(); 751 752 module_call_init(MODULE_INIT_QOM); 753 754 if ((envlist = envlist_create()) == NULL) { 755 (void) fprintf(stderr, "Unable to allocate envlist\n"); 756 exit(1); 757 } 758 759 /* add current environment into the list */ 760 for (wrk = environ; *wrk != NULL; wrk++) { 761 (void) envlist_setenv(envlist, *wrk); 762 } 763 764 cpu_model = NULL; 765 #if defined(cpudef_setup) 766 cpudef_setup(); /* parse cpu definitions in target config file (TBD) */ 767 #endif 768 769 optind = 1; 770 for(;;) { 771 if (optind >= argc) 772 break; 773 r = argv[optind]; 774 if (r[0] != '-') 775 break; 776 optind++; 777 r++; 778 if (!strcmp(r, "-")) { 779 break; 780 } else if (!strcmp(r, "d")) { 781 if (optind >= argc) { 782 break; 783 } 784 log_mask = argv[optind++]; 785 } else if (!strcmp(r, "D")) { 786 if (optind >= argc) { 787 break; 788 } 789 log_file = argv[optind++]; 790 } else if (!strcmp(r, "E")) { 791 r = argv[optind++]; 792 if (envlist_setenv(envlist, r) != 0) 793 usage(); 794 } else if (!strcmp(r, "ignore-environment")) { 795 envlist_free(envlist); 796 if ((envlist = envlist_create()) == NULL) { 797 (void) fprintf(stderr, "Unable to allocate envlist\n"); 798 exit(1); 799 } 800 } else if (!strcmp(r, "U")) { 801 r = argv[optind++]; 802 if (envlist_unsetenv(envlist, r) != 0) 803 usage(); 804 } else if (!strcmp(r, "s")) { 805 r = argv[optind++]; 806 x86_stack_size = strtol(r, (char **)&r, 0); 807 if (x86_stack_size <= 0) 808 usage(); 809 if (*r == 'M') 810 x86_stack_size *= 1024 * 1024; 811 else if (*r == 'k' || *r == 'K') 812 x86_stack_size *= 1024; 813 } else if (!strcmp(r, "L")) { 814 interp_prefix = argv[optind++]; 815 } else if (!strcmp(r, "p")) { 816 qemu_host_page_size = atoi(argv[optind++]); 817 if (qemu_host_page_size == 0 || 818 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) { 819 fprintf(stderr, "page size must be a power of two\n"); 820 exit(1); 821 } 822 } else if (!strcmp(r, "g")) { 823 gdbstub_port = atoi(argv[optind++]); 824 } else if (!strcmp(r, "r")) { 825 qemu_uname_release = argv[optind++]; 826 } else if (!strcmp(r, "cpu")) { 827 cpu_model = argv[optind++]; 828 if (is_help_option(cpu_model)) { 829 /* XXX: implement xxx_cpu_list for targets that still miss it */ 830 #if defined(cpu_list) 831 cpu_list(stdout, &fprintf); 832 #endif 833 exit(1); 834 } 835 #if defined(CONFIG_USE_GUEST_BASE) 836 } else if (!strcmp(r, "B")) { 837 guest_base = strtol(argv[optind++], NULL, 0); 838 have_guest_base = 1; 839 #endif 840 } else if (!strcmp(r, "drop-ld-preload")) { 841 (void) envlist_unsetenv(envlist, "LD_PRELOAD"); 842 } else if (!strcmp(r, "bsd")) { 843 if (!strcasecmp(argv[optind], "freebsd")) { 844 bsd_type = target_freebsd; 845 } else if (!strcasecmp(argv[optind], "netbsd")) { 846 bsd_type = target_netbsd; 847 } else if (!strcasecmp(argv[optind], "openbsd")) { 848 bsd_type = target_openbsd; 849 } else { 850 usage(); 851 } 852 optind++; 853 } else if (!strcmp(r, "singlestep")) { 854 singlestep = 1; 855 } else if (!strcmp(r, "strace")) { 856 do_strace = 1; 857 } else 858 { 859 usage(); 860 } 861 } 862 863 /* init debug */ 864 qemu_set_log_filename(log_file); 865 if (log_mask) { 866 int mask; 867 868 mask = qemu_str_to_log_mask(log_mask); 869 if (!mask) { 870 qemu_print_log_usage(stdout); 871 exit(1); 872 } 873 qemu_set_log(mask); 874 } 875 876 if (optind >= argc) { 877 usage(); 878 } 879 filename = argv[optind]; 880 881 /* Zero out regs */ 882 memset(regs, 0, sizeof(struct target_pt_regs)); 883 884 /* Zero out image_info */ 885 memset(info, 0, sizeof(struct image_info)); 886 887 /* Scan interp_prefix dir for replacement files. */ 888 init_paths(interp_prefix); 889 890 if (cpu_model == NULL) { 891 #if defined(TARGET_I386) 892 #ifdef TARGET_X86_64 893 cpu_model = "qemu64"; 894 #else 895 cpu_model = "qemu32"; 896 #endif 897 #elif defined(TARGET_SPARC) 898 #ifdef TARGET_SPARC64 899 cpu_model = "TI UltraSparc II"; 900 #else 901 cpu_model = "Fujitsu MB86904"; 902 #endif 903 #else 904 cpu_model = "any"; 905 #endif 906 } 907 tcg_exec_init(0); 908 cpu_exec_init_all(); 909 /* NOTE: we need to init the CPU at this stage to get 910 qemu_host_page_size */ 911 env = cpu_init(cpu_model); 912 if (!env) { 913 fprintf(stderr, "Unable to find CPU definition\n"); 914 exit(1); 915 } 916 #if defined(TARGET_SPARC) || defined(TARGET_PPC) 917 cpu_reset(ENV_GET_CPU(env)); 918 #endif 919 thread_env = env; 920 921 if (getenv("QEMU_STRACE")) { 922 do_strace = 1; 923 } 924 925 target_environ = envlist_to_environ(envlist, NULL); 926 envlist_free(envlist); 927 928 #if defined(CONFIG_USE_GUEST_BASE) 929 /* 930 * Now that page sizes are configured in cpu_init() we can do 931 * proper page alignment for guest_base. 932 */ 933 guest_base = HOST_PAGE_ALIGN(guest_base); 934 935 /* 936 * Read in mmap_min_addr kernel parameter. This value is used 937 * When loading the ELF image to determine whether guest_base 938 * is needed. 939 * 940 * When user has explicitly set the quest base, we skip this 941 * test. 942 */ 943 if (!have_guest_base) { 944 FILE *fp; 945 946 if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) { 947 unsigned long tmp; 948 if (fscanf(fp, "%lu", &tmp) == 1) { 949 mmap_min_addr = tmp; 950 qemu_log("host mmap_min_addr=0x%lx\n", mmap_min_addr); 951 } 952 fclose(fp); 953 } 954 } 955 #endif /* CONFIG_USE_GUEST_BASE */ 956 957 if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) { 958 printf("Error loading %s\n", filename); 959 _exit(1); 960 } 961 962 for (wrk = target_environ; *wrk; wrk++) { 963 free(*wrk); 964 } 965 966 free(target_environ); 967 968 if (qemu_log_enabled()) { 969 #if defined(CONFIG_USE_GUEST_BASE) 970 qemu_log("guest_base 0x%lx\n", guest_base); 971 #endif 972 log_page_dump(); 973 974 qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk); 975 qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code); 976 qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n", 977 info->start_code); 978 qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n", 979 info->start_data); 980 qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data); 981 qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n", 982 info->start_stack); 983 qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk); 984 qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry); 985 } 986 987 target_set_brk(info->brk); 988 syscall_init(); 989 signal_init(); 990 991 #if defined(CONFIG_USE_GUEST_BASE) 992 /* Now that we've loaded the binary, GUEST_BASE is fixed. Delay 993 generating the prologue until now so that the prologue can take 994 the real value of GUEST_BASE into account. */ 995 tcg_prologue_init(&tcg_ctx); 996 #endif 997 998 /* build Task State */ 999 memset(ts, 0, sizeof(TaskState)); 1000 init_task_state(ts); 1001 ts->info = info; 1002 env->opaque = ts; 1003 1004 #if defined(TARGET_I386) 1005 cpu_x86_set_cpl(env, 3); 1006 1007 env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK; 1008 env->hflags |= HF_PE_MASK; 1009 if (env->cpuid_features & CPUID_SSE) { 1010 env->cr[4] |= CR4_OSFXSR_MASK; 1011 env->hflags |= HF_OSFXSR_MASK; 1012 } 1013 #ifndef TARGET_ABI32 1014 /* enable 64 bit mode if possible */ 1015 if (!(env->cpuid_ext2_features & CPUID_EXT2_LM)) { 1016 fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n"); 1017 exit(1); 1018 } 1019 env->cr[4] |= CR4_PAE_MASK; 1020 env->efer |= MSR_EFER_LMA | MSR_EFER_LME; 1021 env->hflags |= HF_LMA_MASK; 1022 #endif 1023 1024 /* flags setup : we activate the IRQs by default as in user mode */ 1025 env->eflags |= IF_MASK; 1026 1027 /* linux register setup */ 1028 #ifndef TARGET_ABI32 1029 env->regs[R_EAX] = regs->rax; 1030 env->regs[R_EBX] = regs->rbx; 1031 env->regs[R_ECX] = regs->rcx; 1032 env->regs[R_EDX] = regs->rdx; 1033 env->regs[R_ESI] = regs->rsi; 1034 env->regs[R_EDI] = regs->rdi; 1035 env->regs[R_EBP] = regs->rbp; 1036 env->regs[R_ESP] = regs->rsp; 1037 env->eip = regs->rip; 1038 #else 1039 env->regs[R_EAX] = regs->eax; 1040 env->regs[R_EBX] = regs->ebx; 1041 env->regs[R_ECX] = regs->ecx; 1042 env->regs[R_EDX] = regs->edx; 1043 env->regs[R_ESI] = regs->esi; 1044 env->regs[R_EDI] = regs->edi; 1045 env->regs[R_EBP] = regs->ebp; 1046 env->regs[R_ESP] = regs->esp; 1047 env->eip = regs->eip; 1048 #endif 1049 1050 /* linux interrupt setup */ 1051 #ifndef TARGET_ABI32 1052 env->idt.limit = 511; 1053 #else 1054 env->idt.limit = 255; 1055 #endif 1056 env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1), 1057 PROT_READ|PROT_WRITE, 1058 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); 1059 idt_table = g2h(env->idt.base); 1060 set_idt(0, 0); 1061 set_idt(1, 0); 1062 set_idt(2, 0); 1063 set_idt(3, 3); 1064 set_idt(4, 3); 1065 set_idt(5, 0); 1066 set_idt(6, 0); 1067 set_idt(7, 0); 1068 set_idt(8, 0); 1069 set_idt(9, 0); 1070 set_idt(10, 0); 1071 set_idt(11, 0); 1072 set_idt(12, 0); 1073 set_idt(13, 0); 1074 set_idt(14, 0); 1075 set_idt(15, 0); 1076 set_idt(16, 0); 1077 set_idt(17, 0); 1078 set_idt(18, 0); 1079 set_idt(19, 0); 1080 set_idt(0x80, 3); 1081 1082 /* linux segment setup */ 1083 { 1084 uint64_t *gdt_table; 1085 env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES, 1086 PROT_READ|PROT_WRITE, 1087 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); 1088 env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1; 1089 gdt_table = g2h(env->gdt.base); 1090 #ifdef TARGET_ABI32 1091 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff, 1092 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 1093 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT)); 1094 #else 1095 /* 64 bit code segment */ 1096 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff, 1097 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 1098 DESC_L_MASK | 1099 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT)); 1100 #endif 1101 write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff, 1102 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 1103 (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT)); 1104 } 1105 1106 cpu_x86_load_seg(env, R_CS, __USER_CS); 1107 cpu_x86_load_seg(env, R_SS, __USER_DS); 1108 #ifdef TARGET_ABI32 1109 cpu_x86_load_seg(env, R_DS, __USER_DS); 1110 cpu_x86_load_seg(env, R_ES, __USER_DS); 1111 cpu_x86_load_seg(env, R_FS, __USER_DS); 1112 cpu_x86_load_seg(env, R_GS, __USER_DS); 1113 /* This hack makes Wine work... */ 1114 env->segs[R_FS].selector = 0; 1115 #else 1116 cpu_x86_load_seg(env, R_DS, 0); 1117 cpu_x86_load_seg(env, R_ES, 0); 1118 cpu_x86_load_seg(env, R_FS, 0); 1119 cpu_x86_load_seg(env, R_GS, 0); 1120 #endif 1121 #elif defined(TARGET_SPARC) 1122 { 1123 int i; 1124 env->pc = regs->pc; 1125 env->npc = regs->npc; 1126 env->y = regs->y; 1127 for(i = 0; i < 8; i++) 1128 env->gregs[i] = regs->u_regs[i]; 1129 for(i = 0; i < 8; i++) 1130 env->regwptr[i] = regs->u_regs[i + 8]; 1131 } 1132 #else 1133 #error unsupported target CPU 1134 #endif 1135 1136 if (gdbstub_port) { 1137 gdbserver_start (gdbstub_port); 1138 gdb_handlesig(env, 0); 1139 } 1140 cpu_loop(env); 1141 /* never exits */ 1142 return 0; 1143 } 1144