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-common.h" 22 #include "qemu/units.h" 23 #include "sysemu/tcg.h" 24 #include "qemu-version.h" 25 #include <machine/trap.h> 26 27 #include "qapi/error.h" 28 #include "qemu.h" 29 #include "qemu/config-file.h" 30 #include "qemu/error-report.h" 31 #include "qemu/path.h" 32 #include "qemu/help_option.h" 33 #include "qemu/module.h" 34 #include "cpu.h" 35 #include "exec/exec-all.h" 36 #include "tcg/tcg.h" 37 #include "qemu/timer.h" 38 #include "qemu/envlist.h" 39 #include "exec/log.h" 40 #include "trace/control.h" 41 42 int singlestep; 43 unsigned long mmap_min_addr; 44 unsigned long guest_base; 45 int have_guest_base; 46 unsigned long reserved_va; 47 48 static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX; 49 const char *qemu_uname_release; 50 extern char **environ; 51 enum BSDType bsd_type; 52 53 /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so 54 we allocate a bigger stack. Need a better solution, for example 55 by remapping the process stack directly at the right place */ 56 unsigned long x86_stack_size = 512 * 1024; 57 58 void gemu_log(const char *fmt, ...) 59 { 60 va_list ap; 61 62 va_start(ap, fmt); 63 vfprintf(stderr, fmt, ap); 64 va_end(ap); 65 } 66 67 #if defined(TARGET_I386) 68 int cpu_get_pic_interrupt(CPUX86State *env) 69 { 70 return -1; 71 } 72 #endif 73 74 void fork_start(void) 75 { 76 } 77 78 void fork_end(int child) 79 { 80 if (child) { 81 gdbserver_fork(thread_cpu); 82 } 83 } 84 85 #ifdef TARGET_I386 86 /***********************************************************/ 87 /* CPUX86 core interface */ 88 89 uint64_t cpu_get_tsc(CPUX86State *env) 90 { 91 return cpu_get_host_ticks(); 92 } 93 94 static void write_dt(void *ptr, unsigned long addr, unsigned long limit, 95 int flags) 96 { 97 unsigned int e1, e2; 98 uint32_t *p; 99 e1 = (addr << 16) | (limit & 0xffff); 100 e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000); 101 e2 |= flags; 102 p = ptr; 103 p[0] = tswap32(e1); 104 p[1] = tswap32(e2); 105 } 106 107 static uint64_t *idt_table; 108 #ifdef TARGET_X86_64 109 static void set_gate64(void *ptr, unsigned int type, unsigned int dpl, 110 uint64_t addr, unsigned int sel) 111 { 112 uint32_t *p, e1, e2; 113 e1 = (addr & 0xffff) | (sel << 16); 114 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8); 115 p = ptr; 116 p[0] = tswap32(e1); 117 p[1] = tswap32(e2); 118 p[2] = tswap32(addr >> 32); 119 p[3] = 0; 120 } 121 /* only dpl matters as we do only user space emulation */ 122 static void set_idt(int n, unsigned int dpl) 123 { 124 set_gate64(idt_table + n * 2, 0, dpl, 0, 0); 125 } 126 #else 127 static void set_gate(void *ptr, unsigned int type, unsigned int dpl, 128 uint32_t addr, unsigned int sel) 129 { 130 uint32_t *p, e1, e2; 131 e1 = (addr & 0xffff) | (sel << 16); 132 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8); 133 p = ptr; 134 p[0] = tswap32(e1); 135 p[1] = tswap32(e2); 136 } 137 138 /* only dpl matters as we do only user space emulation */ 139 static void set_idt(int n, unsigned int dpl) 140 { 141 set_gate(idt_table + n, 0, dpl, 0, 0); 142 } 143 #endif 144 145 void cpu_loop(CPUX86State *env) 146 { 147 CPUState *cs = env_cpu(env); 148 int trapnr; 149 abi_ulong pc; 150 //target_siginfo_t info; 151 152 for(;;) { 153 cpu_exec_start(cs); 154 trapnr = cpu_exec(cs); 155 cpu_exec_end(cs); 156 process_queued_cpu_work(cs); 157 158 switch(trapnr) { 159 case 0x80: 160 /* syscall from int $0x80 */ 161 if (bsd_type == target_freebsd) { 162 abi_ulong params = (abi_ulong) env->regs[R_ESP] + 163 sizeof(int32_t); 164 int32_t syscall_nr = env->regs[R_EAX]; 165 int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8; 166 167 if (syscall_nr == TARGET_FREEBSD_NR_syscall) { 168 get_user_s32(syscall_nr, params); 169 params += sizeof(int32_t); 170 } else if (syscall_nr == TARGET_FREEBSD_NR___syscall) { 171 get_user_s32(syscall_nr, params); 172 params += sizeof(int64_t); 173 } 174 get_user_s32(arg1, params); 175 params += sizeof(int32_t); 176 get_user_s32(arg2, params); 177 params += sizeof(int32_t); 178 get_user_s32(arg3, params); 179 params += sizeof(int32_t); 180 get_user_s32(arg4, params); 181 params += sizeof(int32_t); 182 get_user_s32(arg5, params); 183 params += sizeof(int32_t); 184 get_user_s32(arg6, params); 185 params += sizeof(int32_t); 186 get_user_s32(arg7, params); 187 params += sizeof(int32_t); 188 get_user_s32(arg8, params); 189 env->regs[R_EAX] = do_freebsd_syscall(env, 190 syscall_nr, 191 arg1, 192 arg2, 193 arg3, 194 arg4, 195 arg5, 196 arg6, 197 arg7, 198 arg8); 199 } else { //if (bsd_type == target_openbsd) 200 env->regs[R_EAX] = do_openbsd_syscall(env, 201 env->regs[R_EAX], 202 env->regs[R_EBX], 203 env->regs[R_ECX], 204 env->regs[R_EDX], 205 env->regs[R_ESI], 206 env->regs[R_EDI], 207 env->regs[R_EBP]); 208 } 209 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) { 210 env->regs[R_EAX] = -env->regs[R_EAX]; 211 env->eflags |= CC_C; 212 } else { 213 env->eflags &= ~CC_C; 214 } 215 break; 216 #ifndef TARGET_ABI32 217 case EXCP_SYSCALL: 218 /* syscall from syscall instruction */ 219 if (bsd_type == target_freebsd) 220 env->regs[R_EAX] = do_freebsd_syscall(env, 221 env->regs[R_EAX], 222 env->regs[R_EDI], 223 env->regs[R_ESI], 224 env->regs[R_EDX], 225 env->regs[R_ECX], 226 env->regs[8], 227 env->regs[9], 0, 0); 228 else { //if (bsd_type == target_openbsd) 229 env->regs[R_EAX] = do_openbsd_syscall(env, 230 env->regs[R_EAX], 231 env->regs[R_EDI], 232 env->regs[R_ESI], 233 env->regs[R_EDX], 234 env->regs[10], 235 env->regs[8], 236 env->regs[9]); 237 } 238 env->eip = env->exception_next_eip; 239 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) { 240 env->regs[R_EAX] = -env->regs[R_EAX]; 241 env->eflags |= CC_C; 242 } else { 243 env->eflags &= ~CC_C; 244 } 245 break; 246 #endif 247 #if 0 248 case EXCP0B_NOSEG: 249 case EXCP0C_STACK: 250 info.si_signo = SIGBUS; 251 info.si_errno = 0; 252 info.si_code = TARGET_SI_KERNEL; 253 info._sifields._sigfault._addr = 0; 254 queue_signal(env, info.si_signo, &info); 255 break; 256 case EXCP0D_GPF: 257 /* XXX: potential problem if ABI32 */ 258 #ifndef TARGET_X86_64 259 if (env->eflags & VM_MASK) { 260 handle_vm86_fault(env); 261 } else 262 #endif 263 { 264 info.si_signo = SIGSEGV; 265 info.si_errno = 0; 266 info.si_code = TARGET_SI_KERNEL; 267 info._sifields._sigfault._addr = 0; 268 queue_signal(env, info.si_signo, &info); 269 } 270 break; 271 case EXCP0E_PAGE: 272 info.si_signo = SIGSEGV; 273 info.si_errno = 0; 274 if (!(env->error_code & 1)) 275 info.si_code = TARGET_SEGV_MAPERR; 276 else 277 info.si_code = TARGET_SEGV_ACCERR; 278 info._sifields._sigfault._addr = env->cr[2]; 279 queue_signal(env, info.si_signo, &info); 280 break; 281 case EXCP00_DIVZ: 282 #ifndef TARGET_X86_64 283 if (env->eflags & VM_MASK) { 284 handle_vm86_trap(env, trapnr); 285 } else 286 #endif 287 { 288 /* division by zero */ 289 info.si_signo = SIGFPE; 290 info.si_errno = 0; 291 info.si_code = TARGET_FPE_INTDIV; 292 info._sifields._sigfault._addr = env->eip; 293 queue_signal(env, info.si_signo, &info); 294 } 295 break; 296 case EXCP01_DB: 297 case EXCP03_INT3: 298 #ifndef TARGET_X86_64 299 if (env->eflags & VM_MASK) { 300 handle_vm86_trap(env, trapnr); 301 } else 302 #endif 303 { 304 info.si_signo = SIGTRAP; 305 info.si_errno = 0; 306 if (trapnr == EXCP01_DB) { 307 info.si_code = TARGET_TRAP_BRKPT; 308 info._sifields._sigfault._addr = env->eip; 309 } else { 310 info.si_code = TARGET_SI_KERNEL; 311 info._sifields._sigfault._addr = 0; 312 } 313 queue_signal(env, info.si_signo, &info); 314 } 315 break; 316 case EXCP04_INTO: 317 case EXCP05_BOUND: 318 #ifndef TARGET_X86_64 319 if (env->eflags & VM_MASK) { 320 handle_vm86_trap(env, trapnr); 321 } else 322 #endif 323 { 324 info.si_signo = SIGSEGV; 325 info.si_errno = 0; 326 info.si_code = TARGET_SI_KERNEL; 327 info._sifields._sigfault._addr = 0; 328 queue_signal(env, info.si_signo, &info); 329 } 330 break; 331 case EXCP06_ILLOP: 332 info.si_signo = SIGILL; 333 info.si_errno = 0; 334 info.si_code = TARGET_ILL_ILLOPN; 335 info._sifields._sigfault._addr = env->eip; 336 queue_signal(env, info.si_signo, &info); 337 break; 338 #endif 339 case EXCP_INTERRUPT: 340 /* just indicate that signals should be handled asap */ 341 break; 342 #if 0 343 case EXCP_DEBUG: 344 { 345 int sig; 346 347 sig = gdb_handlesig (env, TARGET_SIGTRAP); 348 if (sig) 349 { 350 info.si_signo = sig; 351 info.si_errno = 0; 352 info.si_code = TARGET_TRAP_BRKPT; 353 queue_signal(env, info.si_signo, &info); 354 } 355 } 356 break; 357 #endif 358 default: 359 pc = env->segs[R_CS].base + env->eip; 360 fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n", 361 (long)pc, trapnr); 362 abort(); 363 } 364 process_pending_signals(env); 365 } 366 } 367 #endif 368 369 #ifdef TARGET_SPARC 370 #define SPARC64_STACK_BIAS 2047 371 372 //#define DEBUG_WIN 373 /* WARNING: dealing with register windows _is_ complicated. More info 374 can be found at http://www.sics.se/~psm/sparcstack.html */ 375 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index) 376 { 377 index = (index + cwp * 16) % (16 * env->nwindows); 378 /* wrap handling : if cwp is on the last window, then we use the 379 registers 'after' the end */ 380 if (index < 8 && env->cwp == env->nwindows - 1) 381 index += 16 * env->nwindows; 382 return index; 383 } 384 385 /* save the register window 'cwp1' */ 386 static inline void save_window_offset(CPUSPARCState *env, int cwp1) 387 { 388 unsigned int i; 389 abi_ulong sp_ptr; 390 391 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)]; 392 #ifdef TARGET_SPARC64 393 if (sp_ptr & 3) 394 sp_ptr += SPARC64_STACK_BIAS; 395 #endif 396 #if defined(DEBUG_WIN) 397 printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n", 398 sp_ptr, cwp1); 399 #endif 400 for(i = 0; i < 16; i++) { 401 /* FIXME - what to do if put_user() fails? */ 402 put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr); 403 sp_ptr += sizeof(abi_ulong); 404 } 405 } 406 407 static void save_window(CPUSPARCState *env) 408 { 409 #ifndef TARGET_SPARC64 410 unsigned int new_wim; 411 new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) & 412 ((1LL << env->nwindows) - 1); 413 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2)); 414 env->wim = new_wim; 415 #else 416 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2)); 417 env->cansave++; 418 env->canrestore--; 419 #endif 420 } 421 422 static void restore_window(CPUSPARCState *env) 423 { 424 #ifndef TARGET_SPARC64 425 unsigned int new_wim; 426 #endif 427 unsigned int i, cwp1; 428 abi_ulong sp_ptr; 429 430 #ifndef TARGET_SPARC64 431 new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) & 432 ((1LL << env->nwindows) - 1); 433 #endif 434 435 /* restore the invalid window */ 436 cwp1 = cpu_cwp_inc(env, env->cwp + 1); 437 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)]; 438 #ifdef TARGET_SPARC64 439 if (sp_ptr & 3) 440 sp_ptr += SPARC64_STACK_BIAS; 441 #endif 442 #if defined(DEBUG_WIN) 443 printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n", 444 sp_ptr, cwp1); 445 #endif 446 for(i = 0; i < 16; i++) { 447 /* FIXME - what to do if get_user() fails? */ 448 get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr); 449 sp_ptr += sizeof(abi_ulong); 450 } 451 #ifdef TARGET_SPARC64 452 env->canrestore++; 453 if (env->cleanwin < env->nwindows - 1) 454 env->cleanwin++; 455 env->cansave--; 456 #else 457 env->wim = new_wim; 458 #endif 459 } 460 461 static void flush_windows(CPUSPARCState *env) 462 { 463 int offset, cwp1; 464 465 offset = 1; 466 for(;;) { 467 /* if restore would invoke restore_window(), then we can stop */ 468 cwp1 = cpu_cwp_inc(env, env->cwp + offset); 469 #ifndef TARGET_SPARC64 470 if (env->wim & (1 << cwp1)) 471 break; 472 #else 473 if (env->canrestore == 0) 474 break; 475 env->cansave++; 476 env->canrestore--; 477 #endif 478 save_window_offset(env, cwp1); 479 offset++; 480 } 481 cwp1 = cpu_cwp_inc(env, env->cwp + 1); 482 #ifndef TARGET_SPARC64 483 /* set wim so that restore will reload the registers */ 484 env->wim = 1 << cwp1; 485 #endif 486 #if defined(DEBUG_WIN) 487 printf("flush_windows: nb=%d\n", offset - 1); 488 #endif 489 } 490 491 void cpu_loop(CPUSPARCState *env) 492 { 493 CPUState *cs = env_cpu(env); 494 int trapnr, ret, syscall_nr; 495 //target_siginfo_t info; 496 497 while (1) { 498 cpu_exec_start(cs); 499 trapnr = cpu_exec(cs); 500 cpu_exec_end(cs); 501 process_queued_cpu_work(cs); 502 503 switch (trapnr) { 504 #ifndef TARGET_SPARC64 505 case 0x80: 506 #else 507 /* FreeBSD uses 0x141 for syscalls too */ 508 case 0x141: 509 if (bsd_type != target_freebsd) 510 goto badtrap; 511 case 0x100: 512 #endif 513 syscall_nr = env->gregs[1]; 514 if (bsd_type == target_freebsd) 515 ret = do_freebsd_syscall(env, syscall_nr, 516 env->regwptr[0], env->regwptr[1], 517 env->regwptr[2], env->regwptr[3], 518 env->regwptr[4], env->regwptr[5], 0, 0); 519 else if (bsd_type == target_netbsd) 520 ret = do_netbsd_syscall(env, syscall_nr, 521 env->regwptr[0], env->regwptr[1], 522 env->regwptr[2], env->regwptr[3], 523 env->regwptr[4], env->regwptr[5]); 524 else { //if (bsd_type == target_openbsd) 525 #if defined(TARGET_SPARC64) 526 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG | 527 TARGET_OPENBSD_SYSCALL_G2RFLAG); 528 #endif 529 ret = do_openbsd_syscall(env, syscall_nr, 530 env->regwptr[0], env->regwptr[1], 531 env->regwptr[2], env->regwptr[3], 532 env->regwptr[4], env->regwptr[5]); 533 } 534 if ((unsigned int)ret >= (unsigned int)(-515)) { 535 ret = -ret; 536 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) 537 env->xcc |= PSR_CARRY; 538 #else 539 env->psr |= PSR_CARRY; 540 #endif 541 } else { 542 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) 543 env->xcc &= ~PSR_CARRY; 544 #else 545 env->psr &= ~PSR_CARRY; 546 #endif 547 } 548 env->regwptr[0] = ret; 549 /* next instruction */ 550 #if defined(TARGET_SPARC64) 551 if (bsd_type == target_openbsd && 552 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) { 553 env->pc = env->gregs[2]; 554 env->npc = env->pc + 4; 555 } else if (bsd_type == target_openbsd && 556 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) { 557 env->pc = env->gregs[7]; 558 env->npc = env->pc + 4; 559 } else { 560 env->pc = env->npc; 561 env->npc = env->npc + 4; 562 } 563 #else 564 env->pc = env->npc; 565 env->npc = env->npc + 4; 566 #endif 567 break; 568 case 0x83: /* flush windows */ 569 #ifdef TARGET_ABI32 570 case 0x103: 571 #endif 572 flush_windows(env); 573 /* next instruction */ 574 env->pc = env->npc; 575 env->npc = env->npc + 4; 576 break; 577 #ifndef TARGET_SPARC64 578 case TT_WIN_OVF: /* window overflow */ 579 save_window(env); 580 break; 581 case TT_WIN_UNF: /* window underflow */ 582 restore_window(env); 583 break; 584 case TT_TFAULT: 585 case TT_DFAULT: 586 #if 0 587 { 588 info.si_signo = SIGSEGV; 589 info.si_errno = 0; 590 /* XXX: check env->error_code */ 591 info.si_code = TARGET_SEGV_MAPERR; 592 info._sifields._sigfault._addr = env->mmuregs[4]; 593 queue_signal(env, info.si_signo, &info); 594 } 595 #endif 596 break; 597 #else 598 case TT_SPILL: /* window overflow */ 599 save_window(env); 600 break; 601 case TT_FILL: /* window underflow */ 602 restore_window(env); 603 break; 604 case TT_TFAULT: 605 case TT_DFAULT: 606 #if 0 607 { 608 info.si_signo = SIGSEGV; 609 info.si_errno = 0; 610 /* XXX: check env->error_code */ 611 info.si_code = TARGET_SEGV_MAPERR; 612 if (trapnr == TT_DFAULT) 613 info._sifields._sigfault._addr = env->dmmuregs[4]; 614 else 615 info._sifields._sigfault._addr = env->tsptr->tpc; 616 //queue_signal(env, info.si_signo, &info); 617 } 618 #endif 619 break; 620 #endif 621 case EXCP_INTERRUPT: 622 /* just indicate that signals should be handled asap */ 623 break; 624 case EXCP_DEBUG: 625 { 626 #if 0 627 int sig = 628 #endif 629 gdb_handlesig(cs, TARGET_SIGTRAP); 630 #if 0 631 if (sig) 632 { 633 info.si_signo = sig; 634 info.si_errno = 0; 635 info.si_code = TARGET_TRAP_BRKPT; 636 //queue_signal(env, info.si_signo, &info); 637 } 638 #endif 639 } 640 break; 641 default: 642 #ifdef TARGET_SPARC64 643 badtrap: 644 #endif 645 printf ("Unhandled trap: 0x%x\n", trapnr); 646 cpu_dump_state(cs, stderr, 0); 647 exit (1); 648 } 649 process_pending_signals (env); 650 } 651 } 652 653 #endif 654 655 static void usage(void) 656 { 657 printf("qemu-" TARGET_NAME " version " QEMU_FULL_VERSION 658 "\n" QEMU_COPYRIGHT "\n" 659 "usage: qemu-" TARGET_NAME " [options] program [arguments...]\n" 660 "BSD CPU emulator (compiled for %s emulation)\n" 661 "\n" 662 "Standard options:\n" 663 "-h print this help\n" 664 "-g port wait gdb connection to port\n" 665 "-L path set the elf interpreter prefix (default=%s)\n" 666 "-s size set the stack size in bytes (default=%ld)\n" 667 "-cpu model select CPU (-cpu help for list)\n" 668 "-drop-ld-preload drop LD_PRELOAD for target process\n" 669 "-E var=value sets/modifies targets environment variable(s)\n" 670 "-U var unsets targets environment variable(s)\n" 671 "-B address set guest_base address to address\n" 672 "-bsd type select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n" 673 "\n" 674 "Debug options:\n" 675 "-d item1[,...] enable logging of specified items\n" 676 " (use '-d help' for a list of log items)\n" 677 "-D logfile write logs to 'logfile' (default stderr)\n" 678 "-p pagesize set the host page size to 'pagesize'\n" 679 "-singlestep always run in singlestep mode\n" 680 "-strace log system calls\n" 681 "-trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" 682 " specify tracing options\n" 683 "\n" 684 "Environment variables:\n" 685 "QEMU_STRACE Print system calls and arguments similar to the\n" 686 " 'strace' program. Enable by setting to any value.\n" 687 "You can use -E and -U options to set/unset environment variables\n" 688 "for target process. It is possible to provide several variables\n" 689 "by repeating the option. For example:\n" 690 " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n" 691 "Note that if you provide several changes to single variable\n" 692 "last change will stay in effect.\n" 693 "\n" 694 QEMU_HELP_BOTTOM "\n" 695 , 696 TARGET_NAME, 697 interp_prefix, 698 x86_stack_size); 699 exit(1); 700 } 701 702 THREAD CPUState *thread_cpu; 703 704 bool qemu_cpu_is_self(CPUState *cpu) 705 { 706 return thread_cpu == cpu; 707 } 708 709 void qemu_cpu_kick(CPUState *cpu) 710 { 711 cpu_exit(cpu); 712 } 713 714 /* Assumes contents are already zeroed. */ 715 void init_task_state(TaskState *ts) 716 { 717 int i; 718 719 ts->used = 1; 720 ts->first_free = ts->sigqueue_table; 721 for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) { 722 ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1]; 723 } 724 ts->sigqueue_table[i].next = NULL; 725 } 726 727 int main(int argc, char **argv) 728 { 729 const char *filename; 730 const char *cpu_model; 731 const char *cpu_type; 732 const char *log_file = NULL; 733 const char *log_mask = NULL; 734 struct target_pt_regs regs1, *regs = ®s1; 735 struct image_info info1, *info = &info1; 736 TaskState ts1, *ts = &ts1; 737 CPUArchState *env; 738 CPUState *cpu; 739 int optind; 740 const char *r; 741 const char *gdbstub = NULL; 742 char **target_environ, **wrk; 743 envlist_t *envlist = NULL; 744 char *trace_file = NULL; 745 bsd_type = target_openbsd; 746 747 if (argc <= 1) 748 usage(); 749 750 error_init(argv[0]); 751 module_call_init(MODULE_INIT_TRACE); 752 qemu_init_cpu_list(); 753 module_call_init(MODULE_INIT_QOM); 754 755 envlist = envlist_create(); 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; 763 764 qemu_add_opts(&qemu_trace_opts); 765 766 optind = 1; 767 for (;;) { 768 if (optind >= argc) 769 break; 770 r = argv[optind]; 771 if (r[0] != '-') 772 break; 773 optind++; 774 r++; 775 if (!strcmp(r, "-")) { 776 break; 777 } else if (!strcmp(r, "d")) { 778 if (optind >= argc) { 779 break; 780 } 781 log_mask = argv[optind++]; 782 } else if (!strcmp(r, "D")) { 783 if (optind >= argc) { 784 break; 785 } 786 log_file = argv[optind++]; 787 } else if (!strcmp(r, "E")) { 788 r = argv[optind++]; 789 if (envlist_setenv(envlist, r) != 0) 790 usage(); 791 } else if (!strcmp(r, "ignore-environment")) { 792 envlist_free(envlist); 793 envlist = envlist_create(); 794 } else if (!strcmp(r, "U")) { 795 r = argv[optind++]; 796 if (envlist_unsetenv(envlist, r) != 0) 797 usage(); 798 } else if (!strcmp(r, "s")) { 799 r = argv[optind++]; 800 x86_stack_size = strtol(r, (char **)&r, 0); 801 if (x86_stack_size <= 0) 802 usage(); 803 if (*r == 'M') 804 x86_stack_size *= MiB; 805 else if (*r == 'k' || *r == 'K') 806 x86_stack_size *= KiB; 807 } else if (!strcmp(r, "L")) { 808 interp_prefix = argv[optind++]; 809 } else if (!strcmp(r, "p")) { 810 qemu_host_page_size = atoi(argv[optind++]); 811 if (qemu_host_page_size == 0 || 812 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) { 813 fprintf(stderr, "page size must be a power of two\n"); 814 exit(1); 815 } 816 } else if (!strcmp(r, "g")) { 817 gdbstub = g_strdup(argv[optind++]); 818 } else if (!strcmp(r, "r")) { 819 qemu_uname_release = argv[optind++]; 820 } else if (!strcmp(r, "cpu")) { 821 cpu_model = argv[optind++]; 822 if (is_help_option(cpu_model)) { 823 /* XXX: implement xxx_cpu_list for targets that still miss it */ 824 #if defined(cpu_list) 825 cpu_list(); 826 #endif 827 exit(1); 828 } 829 } else if (!strcmp(r, "B")) { 830 guest_base = strtol(argv[optind++], NULL, 0); 831 have_guest_base = 1; 832 } else if (!strcmp(r, "drop-ld-preload")) { 833 (void) envlist_unsetenv(envlist, "LD_PRELOAD"); 834 } else if (!strcmp(r, "bsd")) { 835 if (!strcasecmp(argv[optind], "freebsd")) { 836 bsd_type = target_freebsd; 837 } else if (!strcasecmp(argv[optind], "netbsd")) { 838 bsd_type = target_netbsd; 839 } else if (!strcasecmp(argv[optind], "openbsd")) { 840 bsd_type = target_openbsd; 841 } else { 842 usage(); 843 } 844 optind++; 845 } else if (!strcmp(r, "singlestep")) { 846 singlestep = 1; 847 } else if (!strcmp(r, "strace")) { 848 do_strace = 1; 849 } else if (!strcmp(r, "trace")) { 850 g_free(trace_file); 851 trace_file = trace_opt_parse(optarg); 852 } else { 853 usage(); 854 } 855 } 856 857 /* init debug */ 858 qemu_log_needs_buffers(); 859 qemu_set_log_filename(log_file, &error_fatal); 860 if (log_mask) { 861 int mask; 862 863 mask = qemu_str_to_log_mask(log_mask); 864 if (!mask) { 865 qemu_print_log_usage(stdout); 866 exit(1); 867 } 868 qemu_set_log(mask); 869 } 870 871 if (optind >= argc) { 872 usage(); 873 } 874 filename = argv[optind]; 875 876 if (!trace_init_backends()) { 877 exit(1); 878 } 879 trace_init_file(trace_file); 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 } 907 908 /* init tcg before creating CPUs and to get qemu_host_page_size */ 909 tcg_exec_init(0); 910 911 cpu_type = parse_cpu_option(cpu_model); 912 cpu = cpu_create(cpu_type); 913 env = cpu->env_ptr; 914 #if defined(TARGET_SPARC) || defined(TARGET_PPC) 915 cpu_reset(cpu); 916 #endif 917 thread_cpu = cpu; 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 /* 927 * Now that page sizes are configured in tcg_exec_init() we can do 928 * proper page alignment for guest_base. 929 */ 930 guest_base = HOST_PAGE_ALIGN(guest_base); 931 932 /* 933 * Read in mmap_min_addr kernel parameter. This value is used 934 * When loading the ELF image to determine whether guest_base 935 * is needed. 936 * 937 * When user has explicitly set the quest base, we skip this 938 * test. 939 */ 940 if (!have_guest_base) { 941 FILE *fp; 942 943 if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) { 944 unsigned long tmp; 945 if (fscanf(fp, "%lu", &tmp) == 1) { 946 mmap_min_addr = tmp; 947 qemu_log_mask(CPU_LOG_PAGE, "host mmap_min_addr=0x%lx\n", mmap_min_addr); 948 } 949 fclose(fp); 950 } 951 } 952 953 if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) { 954 printf("Error loading %s\n", filename); 955 _exit(1); 956 } 957 958 for (wrk = target_environ; *wrk; wrk++) { 959 g_free(*wrk); 960 } 961 962 g_free(target_environ); 963 964 if (qemu_loglevel_mask(CPU_LOG_PAGE)) { 965 qemu_log("guest_base 0x%lx\n", guest_base); 966 log_page_dump("binary load"); 967 968 qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk); 969 qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code); 970 qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n", 971 info->start_code); 972 qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n", 973 info->start_data); 974 qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data); 975 qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n", 976 info->start_stack); 977 qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk); 978 qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry); 979 } 980 981 target_set_brk(info->brk); 982 syscall_init(); 983 signal_init(); 984 985 /* Now that we've loaded the binary, GUEST_BASE is fixed. Delay 986 generating the prologue until now so that the prologue can take 987 the real value of GUEST_BASE into account. */ 988 tcg_prologue_init(tcg_ctx); 989 tcg_region_init(); 990 991 /* build Task State */ 992 memset(ts, 0, sizeof(TaskState)); 993 init_task_state(ts); 994 ts->info = info; 995 cpu->opaque = ts; 996 997 #if defined(TARGET_I386) 998 env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK; 999 env->hflags |= HF_PE_MASK | HF_CPL_MASK; 1000 if (env->features[FEAT_1_EDX] & CPUID_SSE) { 1001 env->cr[4] |= CR4_OSFXSR_MASK; 1002 env->hflags |= HF_OSFXSR_MASK; 1003 } 1004 #ifndef TARGET_ABI32 1005 /* enable 64 bit mode if possible */ 1006 if (!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM)) { 1007 fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n"); 1008 exit(1); 1009 } 1010 env->cr[4] |= CR4_PAE_MASK; 1011 env->efer |= MSR_EFER_LMA | MSR_EFER_LME; 1012 env->hflags |= HF_LMA_MASK; 1013 #endif 1014 1015 /* flags setup : we activate the IRQs by default as in user mode */ 1016 env->eflags |= IF_MASK; 1017 1018 /* linux register setup */ 1019 #ifndef TARGET_ABI32 1020 env->regs[R_EAX] = regs->rax; 1021 env->regs[R_EBX] = regs->rbx; 1022 env->regs[R_ECX] = regs->rcx; 1023 env->regs[R_EDX] = regs->rdx; 1024 env->regs[R_ESI] = regs->rsi; 1025 env->regs[R_EDI] = regs->rdi; 1026 env->regs[R_EBP] = regs->rbp; 1027 env->regs[R_ESP] = regs->rsp; 1028 env->eip = regs->rip; 1029 #else 1030 env->regs[R_EAX] = regs->eax; 1031 env->regs[R_EBX] = regs->ebx; 1032 env->regs[R_ECX] = regs->ecx; 1033 env->regs[R_EDX] = regs->edx; 1034 env->regs[R_ESI] = regs->esi; 1035 env->regs[R_EDI] = regs->edi; 1036 env->regs[R_EBP] = regs->ebp; 1037 env->regs[R_ESP] = regs->esp; 1038 env->eip = regs->eip; 1039 #endif 1040 1041 /* linux interrupt setup */ 1042 #ifndef TARGET_ABI32 1043 env->idt.limit = 511; 1044 #else 1045 env->idt.limit = 255; 1046 #endif 1047 env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1), 1048 PROT_READ|PROT_WRITE, 1049 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); 1050 idt_table = g2h(env->idt.base); 1051 set_idt(0, 0); 1052 set_idt(1, 0); 1053 set_idt(2, 0); 1054 set_idt(3, 3); 1055 set_idt(4, 3); 1056 set_idt(5, 0); 1057 set_idt(6, 0); 1058 set_idt(7, 0); 1059 set_idt(8, 0); 1060 set_idt(9, 0); 1061 set_idt(10, 0); 1062 set_idt(11, 0); 1063 set_idt(12, 0); 1064 set_idt(13, 0); 1065 set_idt(14, 0); 1066 set_idt(15, 0); 1067 set_idt(16, 0); 1068 set_idt(17, 0); 1069 set_idt(18, 0); 1070 set_idt(19, 0); 1071 set_idt(0x80, 3); 1072 1073 /* linux segment setup */ 1074 { 1075 uint64_t *gdt_table; 1076 env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES, 1077 PROT_READ|PROT_WRITE, 1078 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); 1079 env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1; 1080 gdt_table = g2h(env->gdt.base); 1081 #ifdef TARGET_ABI32 1082 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff, 1083 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 1084 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT)); 1085 #else 1086 /* 64 bit code segment */ 1087 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff, 1088 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 1089 DESC_L_MASK | 1090 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT)); 1091 #endif 1092 write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff, 1093 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 1094 (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT)); 1095 } 1096 1097 cpu_x86_load_seg(env, R_CS, __USER_CS); 1098 cpu_x86_load_seg(env, R_SS, __USER_DS); 1099 #ifdef TARGET_ABI32 1100 cpu_x86_load_seg(env, R_DS, __USER_DS); 1101 cpu_x86_load_seg(env, R_ES, __USER_DS); 1102 cpu_x86_load_seg(env, R_FS, __USER_DS); 1103 cpu_x86_load_seg(env, R_GS, __USER_DS); 1104 /* This hack makes Wine work... */ 1105 env->segs[R_FS].selector = 0; 1106 #else 1107 cpu_x86_load_seg(env, R_DS, 0); 1108 cpu_x86_load_seg(env, R_ES, 0); 1109 cpu_x86_load_seg(env, R_FS, 0); 1110 cpu_x86_load_seg(env, R_GS, 0); 1111 #endif 1112 #elif defined(TARGET_SPARC) 1113 { 1114 int i; 1115 env->pc = regs->pc; 1116 env->npc = regs->npc; 1117 env->y = regs->y; 1118 for(i = 0; i < 8; i++) 1119 env->gregs[i] = regs->u_regs[i]; 1120 for(i = 0; i < 8; i++) 1121 env->regwptr[i] = regs->u_regs[i + 8]; 1122 } 1123 #else 1124 #error unsupported target CPU 1125 #endif 1126 1127 if (gdbstub) { 1128 gdbserver_start(gdbstub); 1129 gdb_handlesig(cpu, 0); 1130 } 1131 cpu_loop(env); 1132 /* never exits */ 1133 return 0; 1134 } 1135