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 20 #include "qemu/osdep.h" 21 #include "qemu/units.h" 22 #include "sysemu/tcg.h" 23 #include "qemu-version.h" 24 #include <machine/trap.h> 25 26 #include "qapi/error.h" 27 #include "qemu.h" 28 #include "qemu/config-file.h" 29 #include "qemu/error-report.h" 30 #include "qemu/path.h" 31 #include "qemu/help_option.h" 32 #include "qemu/module.h" 33 #include "cpu.h" 34 #include "exec/exec-all.h" 35 #include "tcg.h" 36 #include "qemu/timer.h" 37 #include "qemu/envlist.h" 38 #include "exec/log.h" 39 #include "trace/control.h" 40 41 int singlestep; 42 unsigned long mmap_min_addr; 43 unsigned long guest_base; 44 int have_guest_base; 45 unsigned long reserved_va; 46 47 static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX; 48 const char *qemu_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 void fork_start(void) 74 { 75 } 76 77 void fork_end(int child) 78 { 79 if (child) { 80 gdbserver_fork(thread_cpu); 81 } 82 } 83 84 #ifdef TARGET_I386 85 /***********************************************************/ 86 /* CPUX86 core interface */ 87 88 uint64_t cpu_get_tsc(CPUX86State *env) 89 { 90 return cpu_get_host_ticks(); 91 } 92 93 static void write_dt(void *ptr, unsigned long addr, unsigned long limit, 94 int flags) 95 { 96 unsigned int e1, e2; 97 uint32_t *p; 98 e1 = (addr << 16) | (limit & 0xffff); 99 e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000); 100 e2 |= flags; 101 p = ptr; 102 p[0] = tswap32(e1); 103 p[1] = tswap32(e2); 104 } 105 106 static uint64_t *idt_table; 107 #ifdef TARGET_X86_64 108 static void set_gate64(void *ptr, unsigned int type, unsigned int dpl, 109 uint64_t addr, unsigned int sel) 110 { 111 uint32_t *p, e1, e2; 112 e1 = (addr & 0xffff) | (sel << 16); 113 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8); 114 p = ptr; 115 p[0] = tswap32(e1); 116 p[1] = tswap32(e2); 117 p[2] = tswap32(addr >> 32); 118 p[3] = 0; 119 } 120 /* only dpl matters as we do only user space emulation */ 121 static void set_idt(int n, unsigned int dpl) 122 { 123 set_gate64(idt_table + n * 2, 0, dpl, 0, 0); 124 } 125 #else 126 static void set_gate(void *ptr, unsigned int type, unsigned int dpl, 127 uint32_t addr, unsigned int sel) 128 { 129 uint32_t *p, e1, e2; 130 e1 = (addr & 0xffff) | (sel << 16); 131 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8); 132 p = ptr; 133 p[0] = tswap32(e1); 134 p[1] = tswap32(e2); 135 } 136 137 /* only dpl matters as we do only user space emulation */ 138 static void set_idt(int n, unsigned int dpl) 139 { 140 set_gate(idt_table + n, 0, dpl, 0, 0); 141 } 142 #endif 143 144 void cpu_loop(CPUX86State *env) 145 { 146 CPUState *cs = env_cpu(env); 147 int trapnr; 148 abi_ulong pc; 149 //target_siginfo_t info; 150 151 for(;;) { 152 cpu_exec_start(cs); 153 trapnr = cpu_exec(cs); 154 cpu_exec_end(cs); 155 process_queued_cpu_work(cs); 156 157 switch(trapnr) { 158 case 0x80: 159 /* syscall from int $0x80 */ 160 if (bsd_type == target_freebsd) { 161 abi_ulong params = (abi_ulong) env->regs[R_ESP] + 162 sizeof(int32_t); 163 int32_t syscall_nr = env->regs[R_EAX]; 164 int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8; 165 166 if (syscall_nr == TARGET_FREEBSD_NR_syscall) { 167 get_user_s32(syscall_nr, params); 168 params += sizeof(int32_t); 169 } else if (syscall_nr == TARGET_FREEBSD_NR___syscall) { 170 get_user_s32(syscall_nr, params); 171 params += sizeof(int64_t); 172 } 173 get_user_s32(arg1, params); 174 params += sizeof(int32_t); 175 get_user_s32(arg2, params); 176 params += sizeof(int32_t); 177 get_user_s32(arg3, params); 178 params += sizeof(int32_t); 179 get_user_s32(arg4, params); 180 params += sizeof(int32_t); 181 get_user_s32(arg5, params); 182 params += sizeof(int32_t); 183 get_user_s32(arg6, params); 184 params += sizeof(int32_t); 185 get_user_s32(arg7, params); 186 params += sizeof(int32_t); 187 get_user_s32(arg8, params); 188 env->regs[R_EAX] = do_freebsd_syscall(env, 189 syscall_nr, 190 arg1, 191 arg2, 192 arg3, 193 arg4, 194 arg5, 195 arg6, 196 arg7, 197 arg8); 198 } else { //if (bsd_type == target_openbsd) 199 env->regs[R_EAX] = do_openbsd_syscall(env, 200 env->regs[R_EAX], 201 env->regs[R_EBX], 202 env->regs[R_ECX], 203 env->regs[R_EDX], 204 env->regs[R_ESI], 205 env->regs[R_EDI], 206 env->regs[R_EBP]); 207 } 208 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) { 209 env->regs[R_EAX] = -env->regs[R_EAX]; 210 env->eflags |= CC_C; 211 } else { 212 env->eflags &= ~CC_C; 213 } 214 break; 215 #ifndef TARGET_ABI32 216 case EXCP_SYSCALL: 217 /* syscall from syscall instruction */ 218 if (bsd_type == target_freebsd) 219 env->regs[R_EAX] = do_freebsd_syscall(env, 220 env->regs[R_EAX], 221 env->regs[R_EDI], 222 env->regs[R_ESI], 223 env->regs[R_EDX], 224 env->regs[R_ECX], 225 env->regs[8], 226 env->regs[9], 0, 0); 227 else { //if (bsd_type == target_openbsd) 228 env->regs[R_EAX] = do_openbsd_syscall(env, 229 env->regs[R_EAX], 230 env->regs[R_EDI], 231 env->regs[R_ESI], 232 env->regs[R_EDX], 233 env->regs[10], 234 env->regs[8], 235 env->regs[9]); 236 } 237 env->eip = env->exception_next_eip; 238 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) { 239 env->regs[R_EAX] = -env->regs[R_EAX]; 240 env->eflags |= CC_C; 241 } else { 242 env->eflags &= ~CC_C; 243 } 244 break; 245 #endif 246 #if 0 247 case EXCP0B_NOSEG: 248 case EXCP0C_STACK: 249 info.si_signo = SIGBUS; 250 info.si_errno = 0; 251 info.si_code = TARGET_SI_KERNEL; 252 info._sifields._sigfault._addr = 0; 253 queue_signal(env, info.si_signo, &info); 254 break; 255 case EXCP0D_GPF: 256 /* XXX: potential problem if ABI32 */ 257 #ifndef TARGET_X86_64 258 if (env->eflags & VM_MASK) { 259 handle_vm86_fault(env); 260 } else 261 #endif 262 { 263 info.si_signo = SIGSEGV; 264 info.si_errno = 0; 265 info.si_code = TARGET_SI_KERNEL; 266 info._sifields._sigfault._addr = 0; 267 queue_signal(env, info.si_signo, &info); 268 } 269 break; 270 case EXCP0E_PAGE: 271 info.si_signo = SIGSEGV; 272 info.si_errno = 0; 273 if (!(env->error_code & 1)) 274 info.si_code = TARGET_SEGV_MAPERR; 275 else 276 info.si_code = TARGET_SEGV_ACCERR; 277 info._sifields._sigfault._addr = env->cr[2]; 278 queue_signal(env, info.si_signo, &info); 279 break; 280 case EXCP00_DIVZ: 281 #ifndef TARGET_X86_64 282 if (env->eflags & VM_MASK) { 283 handle_vm86_trap(env, trapnr); 284 } else 285 #endif 286 { 287 /* division by zero */ 288 info.si_signo = SIGFPE; 289 info.si_errno = 0; 290 info.si_code = TARGET_FPE_INTDIV; 291 info._sifields._sigfault._addr = env->eip; 292 queue_signal(env, info.si_signo, &info); 293 } 294 break; 295 case EXCP01_DB: 296 case EXCP03_INT3: 297 #ifndef TARGET_X86_64 298 if (env->eflags & VM_MASK) { 299 handle_vm86_trap(env, trapnr); 300 } else 301 #endif 302 { 303 info.si_signo = SIGTRAP; 304 info.si_errno = 0; 305 if (trapnr == EXCP01_DB) { 306 info.si_code = TARGET_TRAP_BRKPT; 307 info._sifields._sigfault._addr = env->eip; 308 } else { 309 info.si_code = TARGET_SI_KERNEL; 310 info._sifields._sigfault._addr = 0; 311 } 312 queue_signal(env, info.si_signo, &info); 313 } 314 break; 315 case EXCP04_INTO: 316 case EXCP05_BOUND: 317 #ifndef TARGET_X86_64 318 if (env->eflags & VM_MASK) { 319 handle_vm86_trap(env, trapnr); 320 } else 321 #endif 322 { 323 info.si_signo = SIGSEGV; 324 info.si_errno = 0; 325 info.si_code = TARGET_SI_KERNEL; 326 info._sifields._sigfault._addr = 0; 327 queue_signal(env, info.si_signo, &info); 328 } 329 break; 330 case EXCP06_ILLOP: 331 info.si_signo = SIGILL; 332 info.si_errno = 0; 333 info.si_code = TARGET_ILL_ILLOPN; 334 info._sifields._sigfault._addr = env->eip; 335 queue_signal(env, info.si_signo, &info); 336 break; 337 #endif 338 case EXCP_INTERRUPT: 339 /* just indicate that signals should be handled asap */ 340 break; 341 #if 0 342 case EXCP_DEBUG: 343 { 344 int sig; 345 346 sig = gdb_handlesig (env, TARGET_SIGTRAP); 347 if (sig) 348 { 349 info.si_signo = sig; 350 info.si_errno = 0; 351 info.si_code = TARGET_TRAP_BRKPT; 352 queue_signal(env, info.si_signo, &info); 353 } 354 } 355 break; 356 #endif 357 default: 358 pc = env->segs[R_CS].base + env->eip; 359 fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n", 360 (long)pc, trapnr); 361 abort(); 362 } 363 process_pending_signals(env); 364 } 365 } 366 #endif 367 368 #ifdef TARGET_SPARC 369 #define SPARC64_STACK_BIAS 2047 370 371 //#define DEBUG_WIN 372 /* WARNING: dealing with register windows _is_ complicated. More info 373 can be found at http://www.sics.se/~psm/sparcstack.html */ 374 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index) 375 { 376 index = (index + cwp * 16) % (16 * env->nwindows); 377 /* wrap handling : if cwp is on the last window, then we use the 378 registers 'after' the end */ 379 if (index < 8 && env->cwp == env->nwindows - 1) 380 index += 16 * env->nwindows; 381 return index; 382 } 383 384 /* save the register window 'cwp1' */ 385 static inline void save_window_offset(CPUSPARCState *env, int cwp1) 386 { 387 unsigned int i; 388 abi_ulong sp_ptr; 389 390 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)]; 391 #ifdef TARGET_SPARC64 392 if (sp_ptr & 3) 393 sp_ptr += SPARC64_STACK_BIAS; 394 #endif 395 #if defined(DEBUG_WIN) 396 printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n", 397 sp_ptr, cwp1); 398 #endif 399 for(i = 0; i < 16; i++) { 400 /* FIXME - what to do if put_user() fails? */ 401 put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr); 402 sp_ptr += sizeof(abi_ulong); 403 } 404 } 405 406 static void save_window(CPUSPARCState *env) 407 { 408 #ifndef TARGET_SPARC64 409 unsigned int new_wim; 410 new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) & 411 ((1LL << env->nwindows) - 1); 412 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2)); 413 env->wim = new_wim; 414 #else 415 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2)); 416 env->cansave++; 417 env->canrestore--; 418 #endif 419 } 420 421 static void restore_window(CPUSPARCState *env) 422 { 423 #ifndef TARGET_SPARC64 424 unsigned int new_wim; 425 #endif 426 unsigned int i, cwp1; 427 abi_ulong sp_ptr; 428 429 #ifndef TARGET_SPARC64 430 new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) & 431 ((1LL << env->nwindows) - 1); 432 #endif 433 434 /* restore the invalid window */ 435 cwp1 = cpu_cwp_inc(env, env->cwp + 1); 436 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)]; 437 #ifdef TARGET_SPARC64 438 if (sp_ptr & 3) 439 sp_ptr += SPARC64_STACK_BIAS; 440 #endif 441 #if defined(DEBUG_WIN) 442 printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n", 443 sp_ptr, cwp1); 444 #endif 445 for(i = 0; i < 16; i++) { 446 /* FIXME - what to do if get_user() fails? */ 447 get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr); 448 sp_ptr += sizeof(abi_ulong); 449 } 450 #ifdef TARGET_SPARC64 451 env->canrestore++; 452 if (env->cleanwin < env->nwindows - 1) 453 env->cleanwin++; 454 env->cansave--; 455 #else 456 env->wim = new_wim; 457 #endif 458 } 459 460 static void flush_windows(CPUSPARCState *env) 461 { 462 int offset, cwp1; 463 464 offset = 1; 465 for(;;) { 466 /* if restore would invoke restore_window(), then we can stop */ 467 cwp1 = cpu_cwp_inc(env, env->cwp + offset); 468 #ifndef TARGET_SPARC64 469 if (env->wim & (1 << cwp1)) 470 break; 471 #else 472 if (env->canrestore == 0) 473 break; 474 env->cansave++; 475 env->canrestore--; 476 #endif 477 save_window_offset(env, cwp1); 478 offset++; 479 } 480 cwp1 = cpu_cwp_inc(env, env->cwp + 1); 481 #ifndef TARGET_SPARC64 482 /* set wim so that restore will reload the registers */ 483 env->wim = 1 << cwp1; 484 #endif 485 #if defined(DEBUG_WIN) 486 printf("flush_windows: nb=%d\n", offset - 1); 487 #endif 488 } 489 490 void cpu_loop(CPUSPARCState *env) 491 { 492 CPUState *cs = env_cpu(env); 493 int trapnr, ret, syscall_nr; 494 //target_siginfo_t info; 495 496 while (1) { 497 cpu_exec_start(cs); 498 trapnr = cpu_exec(cs); 499 cpu_exec_end(cs); 500 process_queued_cpu_work(cs); 501 502 switch (trapnr) { 503 #ifndef TARGET_SPARC64 504 case 0x80: 505 #else 506 /* FreeBSD uses 0x141 for syscalls too */ 507 case 0x141: 508 if (bsd_type != target_freebsd) 509 goto badtrap; 510 case 0x100: 511 #endif 512 syscall_nr = env->gregs[1]; 513 if (bsd_type == target_freebsd) 514 ret = do_freebsd_syscall(env, syscall_nr, 515 env->regwptr[0], env->regwptr[1], 516 env->regwptr[2], env->regwptr[3], 517 env->regwptr[4], env->regwptr[5], 0, 0); 518 else if (bsd_type == target_netbsd) 519 ret = do_netbsd_syscall(env, syscall_nr, 520 env->regwptr[0], env->regwptr[1], 521 env->regwptr[2], env->regwptr[3], 522 env->regwptr[4], env->regwptr[5]); 523 else { //if (bsd_type == target_openbsd) 524 #if defined(TARGET_SPARC64) 525 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG | 526 TARGET_OPENBSD_SYSCALL_G2RFLAG); 527 #endif 528 ret = do_openbsd_syscall(env, syscall_nr, 529 env->regwptr[0], env->regwptr[1], 530 env->regwptr[2], env->regwptr[3], 531 env->regwptr[4], env->regwptr[5]); 532 } 533 if ((unsigned int)ret >= (unsigned int)(-515)) { 534 ret = -ret; 535 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) 536 env->xcc |= PSR_CARRY; 537 #else 538 env->psr |= PSR_CARRY; 539 #endif 540 } else { 541 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) 542 env->xcc &= ~PSR_CARRY; 543 #else 544 env->psr &= ~PSR_CARRY; 545 #endif 546 } 547 env->regwptr[0] = ret; 548 /* next instruction */ 549 #if defined(TARGET_SPARC64) 550 if (bsd_type == target_openbsd && 551 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) { 552 env->pc = env->gregs[2]; 553 env->npc = env->pc + 4; 554 } else if (bsd_type == target_openbsd && 555 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) { 556 env->pc = env->gregs[7]; 557 env->npc = env->pc + 4; 558 } else { 559 env->pc = env->npc; 560 env->npc = env->npc + 4; 561 } 562 #else 563 env->pc = env->npc; 564 env->npc = env->npc + 4; 565 #endif 566 break; 567 case 0x83: /* flush windows */ 568 #ifdef TARGET_ABI32 569 case 0x103: 570 #endif 571 flush_windows(env); 572 /* next instruction */ 573 env->pc = env->npc; 574 env->npc = env->npc + 4; 575 break; 576 #ifndef TARGET_SPARC64 577 case TT_WIN_OVF: /* window overflow */ 578 save_window(env); 579 break; 580 case TT_WIN_UNF: /* window underflow */ 581 restore_window(env); 582 break; 583 case TT_TFAULT: 584 case TT_DFAULT: 585 #if 0 586 { 587 info.si_signo = SIGSEGV; 588 info.si_errno = 0; 589 /* XXX: check env->error_code */ 590 info.si_code = TARGET_SEGV_MAPERR; 591 info._sifields._sigfault._addr = env->mmuregs[4]; 592 queue_signal(env, info.si_signo, &info); 593 } 594 #endif 595 break; 596 #else 597 case TT_SPILL: /* window overflow */ 598 save_window(env); 599 break; 600 case TT_FILL: /* 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 if (trapnr == TT_DFAULT) 612 info._sifields._sigfault._addr = env->dmmuregs[4]; 613 else 614 info._sifields._sigfault._addr = env->tsptr->tpc; 615 //queue_signal(env, info.si_signo, &info); 616 } 617 #endif 618 break; 619 #endif 620 case EXCP_INTERRUPT: 621 /* just indicate that signals should be handled asap */ 622 break; 623 case EXCP_DEBUG: 624 { 625 #if 0 626 int sig = 627 #endif 628 gdb_handlesig(cs, TARGET_SIGTRAP); 629 #if 0 630 if (sig) 631 { 632 info.si_signo = sig; 633 info.si_errno = 0; 634 info.si_code = TARGET_TRAP_BRKPT; 635 //queue_signal(env, info.si_signo, &info); 636 } 637 #endif 638 } 639 break; 640 default: 641 #ifdef TARGET_SPARC64 642 badtrap: 643 #endif 644 printf ("Unhandled trap: 0x%x\n", trapnr); 645 cpu_dump_state(cs, stderr, 0); 646 exit (1); 647 } 648 process_pending_signals (env); 649 } 650 } 651 652 #endif 653 654 static void usage(void) 655 { 656 printf("qemu-" TARGET_NAME " version " QEMU_FULL_VERSION 657 "\n" QEMU_COPYRIGHT "\n" 658 "usage: qemu-" TARGET_NAME " [options] program [arguments...]\n" 659 "BSD CPU emulator (compiled for %s emulation)\n" 660 "\n" 661 "Standard options:\n" 662 "-h print this help\n" 663 "-g port wait gdb connection to port\n" 664 "-L path set the elf interpreter prefix (default=%s)\n" 665 "-s size set the stack size in bytes (default=%ld)\n" 666 "-cpu model select CPU (-cpu help for list)\n" 667 "-drop-ld-preload drop LD_PRELOAD for target process\n" 668 "-E var=value sets/modifies targets environment variable(s)\n" 669 "-U var unsets targets environment variable(s)\n" 670 "-B address set guest_base address to address\n" 671 "-bsd type select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n" 672 "\n" 673 "Debug options:\n" 674 "-d item1[,...] enable logging of specified items\n" 675 " (use '-d help' for a list of log items)\n" 676 "-D logfile write logs to 'logfile' (default stderr)\n" 677 "-p pagesize set the host page size to 'pagesize'\n" 678 "-singlestep always run in singlestep mode\n" 679 "-strace log system calls\n" 680 "-trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" 681 " specify tracing options\n" 682 "\n" 683 "Environment variables:\n" 684 "QEMU_STRACE Print system calls and arguments similar to the\n" 685 " 'strace' program. Enable by setting to any value.\n" 686 "You can use -E and -U options to set/unset environment variables\n" 687 "for target process. It is possible to provide several variables\n" 688 "by repeating the option. For example:\n" 689 " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n" 690 "Note that if you provide several changes to single variable\n" 691 "last change will stay in effect.\n" 692 "\n" 693 QEMU_HELP_BOTTOM "\n" 694 , 695 TARGET_NAME, 696 interp_prefix, 697 x86_stack_size); 698 exit(1); 699 } 700 701 THREAD CPUState *thread_cpu; 702 703 bool qemu_cpu_is_self(CPUState *cpu) 704 { 705 return thread_cpu == cpu; 706 } 707 708 void qemu_cpu_kick(CPUState *cpu) 709 { 710 cpu_exit(cpu); 711 } 712 713 /* Assumes contents are already zeroed. */ 714 void init_task_state(TaskState *ts) 715 { 716 int i; 717 718 ts->used = 1; 719 ts->first_free = ts->sigqueue_table; 720 for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) { 721 ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1]; 722 } 723 ts->sigqueue_table[i].next = NULL; 724 } 725 726 int main(int argc, char **argv) 727 { 728 const char *filename; 729 const char *cpu_model; 730 const char *cpu_type; 731 const char *log_file = NULL; 732 const char *log_mask = NULL; 733 struct target_pt_regs regs1, *regs = ®s1; 734 struct image_info info1, *info = &info1; 735 TaskState ts1, *ts = &ts1; 736 CPUArchState *env; 737 CPUState *cpu; 738 int optind; 739 const char *r; 740 int gdbstub_port = 0; 741 char **target_environ, **wrk; 742 envlist_t *envlist = NULL; 743 char *trace_file = NULL; 744 bsd_type = target_openbsd; 745 746 if (argc <= 1) 747 usage(); 748 749 error_init(argv[0]); 750 module_call_init(MODULE_INIT_TRACE); 751 qemu_init_cpu_list(); 752 module_call_init(MODULE_INIT_QOM); 753 754 envlist = envlist_create(); 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; 762 763 qemu_add_opts(&qemu_trace_opts); 764 765 optind = 1; 766 for (;;) { 767 if (optind >= argc) 768 break; 769 r = argv[optind]; 770 if (r[0] != '-') 771 break; 772 optind++; 773 r++; 774 if (!strcmp(r, "-")) { 775 break; 776 } else if (!strcmp(r, "d")) { 777 if (optind >= argc) { 778 break; 779 } 780 log_mask = argv[optind++]; 781 } else if (!strcmp(r, "D")) { 782 if (optind >= argc) { 783 break; 784 } 785 log_file = argv[optind++]; 786 } else if (!strcmp(r, "E")) { 787 r = argv[optind++]; 788 if (envlist_setenv(envlist, r) != 0) 789 usage(); 790 } else if (!strcmp(r, "ignore-environment")) { 791 envlist_free(envlist); 792 envlist = envlist_create(); 793 } else if (!strcmp(r, "U")) { 794 r = argv[optind++]; 795 if (envlist_unsetenv(envlist, r) != 0) 796 usage(); 797 } else if (!strcmp(r, "s")) { 798 r = argv[optind++]; 799 x86_stack_size = strtol(r, (char **)&r, 0); 800 if (x86_stack_size <= 0) 801 usage(); 802 if (*r == 'M') 803 x86_stack_size *= MiB; 804 else if (*r == 'k' || *r == 'K') 805 x86_stack_size *= KiB; 806 } else if (!strcmp(r, "L")) { 807 interp_prefix = argv[optind++]; 808 } else if (!strcmp(r, "p")) { 809 qemu_host_page_size = atoi(argv[optind++]); 810 if (qemu_host_page_size == 0 || 811 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) { 812 fprintf(stderr, "page size must be a power of two\n"); 813 exit(1); 814 } 815 } else if (!strcmp(r, "g")) { 816 gdbstub_port = atoi(argv[optind++]); 817 } else if (!strcmp(r, "r")) { 818 qemu_uname_release = argv[optind++]; 819 } else if (!strcmp(r, "cpu")) { 820 cpu_model = argv[optind++]; 821 if (is_help_option(cpu_model)) { 822 /* XXX: implement xxx_cpu_list for targets that still miss it */ 823 #if defined(cpu_list) 824 cpu_list(); 825 #endif 826 exit(1); 827 } 828 } else if (!strcmp(r, "B")) { 829 guest_base = strtol(argv[optind++], NULL, 0); 830 have_guest_base = 1; 831 } else if (!strcmp(r, "drop-ld-preload")) { 832 (void) envlist_unsetenv(envlist, "LD_PRELOAD"); 833 } else if (!strcmp(r, "bsd")) { 834 if (!strcasecmp(argv[optind], "freebsd")) { 835 bsd_type = target_freebsd; 836 } else if (!strcasecmp(argv[optind], "netbsd")) { 837 bsd_type = target_netbsd; 838 } else if (!strcasecmp(argv[optind], "openbsd")) { 839 bsd_type = target_openbsd; 840 } else { 841 usage(); 842 } 843 optind++; 844 } else if (!strcmp(r, "singlestep")) { 845 singlestep = 1; 846 } else if (!strcmp(r, "strace")) { 847 do_strace = 1; 848 } else if (!strcmp(r, "trace")) { 849 g_free(trace_file); 850 trace_file = trace_opt_parse(optarg); 851 } else { 852 usage(); 853 } 854 } 855 856 /* init debug */ 857 qemu_log_needs_buffers(); 858 qemu_set_log_filename(log_file, &error_fatal); 859 if (log_mask) { 860 int mask; 861 862 mask = qemu_str_to_log_mask(log_mask); 863 if (!mask) { 864 qemu_print_log_usage(stdout); 865 exit(1); 866 } 867 qemu_set_log(mask); 868 } 869 870 if (optind >= argc) { 871 usage(); 872 } 873 filename = argv[optind]; 874 875 if (!trace_init_backends()) { 876 exit(1); 877 } 878 trace_init_file(trace_file); 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 } 906 907 /* init tcg before creating CPUs and to get qemu_host_page_size */ 908 tcg_exec_init(0); 909 910 cpu_type = parse_cpu_option(cpu_model); 911 cpu = cpu_create(cpu_type); 912 env = cpu->env_ptr; 913 #if defined(TARGET_SPARC) || defined(TARGET_PPC) 914 cpu_reset(cpu); 915 #endif 916 thread_cpu = cpu; 917 918 if (getenv("QEMU_STRACE")) { 919 do_strace = 1; 920 } 921 922 target_environ = envlist_to_environ(envlist, NULL); 923 envlist_free(envlist); 924 925 /* 926 * Now that page sizes are configured in tcg_exec_init() we can do 927 * proper page alignment for guest_base. 928 */ 929 guest_base = HOST_PAGE_ALIGN(guest_base); 930 931 /* 932 * Read in mmap_min_addr kernel parameter. This value is used 933 * When loading the ELF image to determine whether guest_base 934 * is needed. 935 * 936 * When user has explicitly set the quest base, we skip this 937 * test. 938 */ 939 if (!have_guest_base) { 940 FILE *fp; 941 942 if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) { 943 unsigned long tmp; 944 if (fscanf(fp, "%lu", &tmp) == 1) { 945 mmap_min_addr = tmp; 946 qemu_log_mask(CPU_LOG_PAGE, "host mmap_min_addr=0x%lx\n", mmap_min_addr); 947 } 948 fclose(fp); 949 } 950 } 951 952 if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) { 953 printf("Error loading %s\n", filename); 954 _exit(1); 955 } 956 957 for (wrk = target_environ; *wrk; wrk++) { 958 g_free(*wrk); 959 } 960 961 g_free(target_environ); 962 963 if (qemu_loglevel_mask(CPU_LOG_PAGE)) { 964 qemu_log("guest_base 0x%lx\n", guest_base); 965 log_page_dump(); 966 967 qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk); 968 qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code); 969 qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n", 970 info->start_code); 971 qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n", 972 info->start_data); 973 qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data); 974 qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n", 975 info->start_stack); 976 qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk); 977 qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry); 978 } 979 980 target_set_brk(info->brk); 981 syscall_init(); 982 signal_init(); 983 984 /* Now that we've loaded the binary, GUEST_BASE is fixed. Delay 985 generating the prologue until now so that the prologue can take 986 the real value of GUEST_BASE into account. */ 987 tcg_prologue_init(tcg_ctx); 988 tcg_region_init(); 989 990 /* build Task State */ 991 memset(ts, 0, sizeof(TaskState)); 992 init_task_state(ts); 993 ts->info = info; 994 cpu->opaque = ts; 995 996 #if defined(TARGET_I386) 997 env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK; 998 env->hflags |= HF_PE_MASK | HF_CPL_MASK; 999 if (env->features[FEAT_1_EDX] & CPUID_SSE) { 1000 env->cr[4] |= CR4_OSFXSR_MASK; 1001 env->hflags |= HF_OSFXSR_MASK; 1002 } 1003 #ifndef TARGET_ABI32 1004 /* enable 64 bit mode if possible */ 1005 if (!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM)) { 1006 fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n"); 1007 exit(1); 1008 } 1009 env->cr[4] |= CR4_PAE_MASK; 1010 env->efer |= MSR_EFER_LMA | MSR_EFER_LME; 1011 env->hflags |= HF_LMA_MASK; 1012 #endif 1013 1014 /* flags setup : we activate the IRQs by default as in user mode */ 1015 env->eflags |= IF_MASK; 1016 1017 /* linux register setup */ 1018 #ifndef TARGET_ABI32 1019 env->regs[R_EAX] = regs->rax; 1020 env->regs[R_EBX] = regs->rbx; 1021 env->regs[R_ECX] = regs->rcx; 1022 env->regs[R_EDX] = regs->rdx; 1023 env->regs[R_ESI] = regs->rsi; 1024 env->regs[R_EDI] = regs->rdi; 1025 env->regs[R_EBP] = regs->rbp; 1026 env->regs[R_ESP] = regs->rsp; 1027 env->eip = regs->rip; 1028 #else 1029 env->regs[R_EAX] = regs->eax; 1030 env->regs[R_EBX] = regs->ebx; 1031 env->regs[R_ECX] = regs->ecx; 1032 env->regs[R_EDX] = regs->edx; 1033 env->regs[R_ESI] = regs->esi; 1034 env->regs[R_EDI] = regs->edi; 1035 env->regs[R_EBP] = regs->ebp; 1036 env->regs[R_ESP] = regs->esp; 1037 env->eip = regs->eip; 1038 #endif 1039 1040 /* linux interrupt setup */ 1041 #ifndef TARGET_ABI32 1042 env->idt.limit = 511; 1043 #else 1044 env->idt.limit = 255; 1045 #endif 1046 env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1), 1047 PROT_READ|PROT_WRITE, 1048 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); 1049 idt_table = g2h(env->idt.base); 1050 set_idt(0, 0); 1051 set_idt(1, 0); 1052 set_idt(2, 0); 1053 set_idt(3, 3); 1054 set_idt(4, 3); 1055 set_idt(5, 0); 1056 set_idt(6, 0); 1057 set_idt(7, 0); 1058 set_idt(8, 0); 1059 set_idt(9, 0); 1060 set_idt(10, 0); 1061 set_idt(11, 0); 1062 set_idt(12, 0); 1063 set_idt(13, 0); 1064 set_idt(14, 0); 1065 set_idt(15, 0); 1066 set_idt(16, 0); 1067 set_idt(17, 0); 1068 set_idt(18, 0); 1069 set_idt(19, 0); 1070 set_idt(0x80, 3); 1071 1072 /* linux segment setup */ 1073 { 1074 uint64_t *gdt_table; 1075 env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES, 1076 PROT_READ|PROT_WRITE, 1077 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); 1078 env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1; 1079 gdt_table = g2h(env->gdt.base); 1080 #ifdef TARGET_ABI32 1081 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff, 1082 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 1083 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT)); 1084 #else 1085 /* 64 bit code segment */ 1086 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff, 1087 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 1088 DESC_L_MASK | 1089 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT)); 1090 #endif 1091 write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff, 1092 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 1093 (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT)); 1094 } 1095 1096 cpu_x86_load_seg(env, R_CS, __USER_CS); 1097 cpu_x86_load_seg(env, R_SS, __USER_DS); 1098 #ifdef TARGET_ABI32 1099 cpu_x86_load_seg(env, R_DS, __USER_DS); 1100 cpu_x86_load_seg(env, R_ES, __USER_DS); 1101 cpu_x86_load_seg(env, R_FS, __USER_DS); 1102 cpu_x86_load_seg(env, R_GS, __USER_DS); 1103 /* This hack makes Wine work... */ 1104 env->segs[R_FS].selector = 0; 1105 #else 1106 cpu_x86_load_seg(env, R_DS, 0); 1107 cpu_x86_load_seg(env, R_ES, 0); 1108 cpu_x86_load_seg(env, R_FS, 0); 1109 cpu_x86_load_seg(env, R_GS, 0); 1110 #endif 1111 #elif defined(TARGET_SPARC) 1112 { 1113 int i; 1114 env->pc = regs->pc; 1115 env->npc = regs->npc; 1116 env->y = regs->y; 1117 for(i = 0; i < 8; i++) 1118 env->gregs[i] = regs->u_regs[i]; 1119 for(i = 0; i < 8; i++) 1120 env->regwptr[i] = regs->u_regs[i + 8]; 1121 } 1122 #else 1123 #error unsupported target CPU 1124 #endif 1125 1126 if (gdbstub_port) { 1127 gdbserver_start (gdbstub_port); 1128 gdb_handlesig(cpu, 0); 1129 } 1130 cpu_loop(env); 1131 /* never exits */ 1132 return 0; 1133 } 1134