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 bool 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 /* 417 * cansave is zero if the spill trap handler is triggered by `save` and 418 * nonzero if triggered by a `flushw` 419 */ 420 save_window_offset(env, cpu_cwp_dec(env, env->cwp - env->cansave - 2)); 421 env->cansave++; 422 env->canrestore--; 423 #endif 424 } 425 426 static void restore_window(CPUSPARCState *env) 427 { 428 #ifndef TARGET_SPARC64 429 unsigned int new_wim; 430 #endif 431 unsigned int i, cwp1; 432 abi_ulong sp_ptr; 433 434 #ifndef TARGET_SPARC64 435 new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) & 436 ((1LL << env->nwindows) - 1); 437 #endif 438 439 /* restore the invalid window */ 440 cwp1 = cpu_cwp_inc(env, env->cwp + 1); 441 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)]; 442 #ifdef TARGET_SPARC64 443 if (sp_ptr & 3) 444 sp_ptr += SPARC64_STACK_BIAS; 445 #endif 446 #if defined(DEBUG_WIN) 447 printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n", 448 sp_ptr, cwp1); 449 #endif 450 for(i = 0; i < 16; i++) { 451 /* FIXME - what to do if get_user() fails? */ 452 get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr); 453 sp_ptr += sizeof(abi_ulong); 454 } 455 #ifdef TARGET_SPARC64 456 env->canrestore++; 457 if (env->cleanwin < env->nwindows - 1) 458 env->cleanwin++; 459 env->cansave--; 460 #else 461 env->wim = new_wim; 462 #endif 463 } 464 465 static void flush_windows(CPUSPARCState *env) 466 { 467 int offset, cwp1; 468 469 offset = 1; 470 for(;;) { 471 /* if restore would invoke restore_window(), then we can stop */ 472 cwp1 = cpu_cwp_inc(env, env->cwp + offset); 473 #ifndef TARGET_SPARC64 474 if (env->wim & (1 << cwp1)) 475 break; 476 #else 477 if (env->canrestore == 0) 478 break; 479 env->cansave++; 480 env->canrestore--; 481 #endif 482 save_window_offset(env, cwp1); 483 offset++; 484 } 485 cwp1 = cpu_cwp_inc(env, env->cwp + 1); 486 #ifndef TARGET_SPARC64 487 /* set wim so that restore will reload the registers */ 488 env->wim = 1 << cwp1; 489 #endif 490 #if defined(DEBUG_WIN) 491 printf("flush_windows: nb=%d\n", offset - 1); 492 #endif 493 } 494 495 void cpu_loop(CPUSPARCState *env) 496 { 497 CPUState *cs = env_cpu(env); 498 int trapnr, ret, syscall_nr; 499 //target_siginfo_t info; 500 501 while (1) { 502 cpu_exec_start(cs); 503 trapnr = cpu_exec(cs); 504 cpu_exec_end(cs); 505 process_queued_cpu_work(cs); 506 507 switch (trapnr) { 508 #ifndef TARGET_SPARC64 509 case 0x80: 510 #else 511 /* FreeBSD uses 0x141 for syscalls too */ 512 case 0x141: 513 if (bsd_type != target_freebsd) 514 goto badtrap; 515 case 0x100: 516 #endif 517 syscall_nr = env->gregs[1]; 518 if (bsd_type == target_freebsd) 519 ret = do_freebsd_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], 0, 0); 523 else if (bsd_type == target_netbsd) 524 ret = do_netbsd_syscall(env, syscall_nr, 525 env->regwptr[0], env->regwptr[1], 526 env->regwptr[2], env->regwptr[3], 527 env->regwptr[4], env->regwptr[5]); 528 else { //if (bsd_type == target_openbsd) 529 #if defined(TARGET_SPARC64) 530 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG | 531 TARGET_OPENBSD_SYSCALL_G2RFLAG); 532 #endif 533 ret = do_openbsd_syscall(env, syscall_nr, 534 env->regwptr[0], env->regwptr[1], 535 env->regwptr[2], env->regwptr[3], 536 env->regwptr[4], env->regwptr[5]); 537 } 538 if ((unsigned int)ret >= (unsigned int)(-515)) { 539 ret = -ret; 540 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) 541 env->xcc |= PSR_CARRY; 542 #else 543 env->psr |= PSR_CARRY; 544 #endif 545 } else { 546 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) 547 env->xcc &= ~PSR_CARRY; 548 #else 549 env->psr &= ~PSR_CARRY; 550 #endif 551 } 552 env->regwptr[0] = ret; 553 /* next instruction */ 554 #if defined(TARGET_SPARC64) 555 if (bsd_type == target_openbsd && 556 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) { 557 env->pc = env->gregs[2]; 558 env->npc = env->pc + 4; 559 } else if (bsd_type == target_openbsd && 560 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) { 561 env->pc = env->gregs[7]; 562 env->npc = env->pc + 4; 563 } else { 564 env->pc = env->npc; 565 env->npc = env->npc + 4; 566 } 567 #else 568 env->pc = env->npc; 569 env->npc = env->npc + 4; 570 #endif 571 break; 572 case 0x83: /* flush windows */ 573 #ifdef TARGET_ABI32 574 case 0x103: 575 #endif 576 flush_windows(env); 577 /* next instruction */ 578 env->pc = env->npc; 579 env->npc = env->npc + 4; 580 break; 581 #ifndef TARGET_SPARC64 582 case TT_WIN_OVF: /* window overflow */ 583 save_window(env); 584 break; 585 case TT_WIN_UNF: /* window underflow */ 586 restore_window(env); 587 break; 588 case TT_TFAULT: 589 case TT_DFAULT: 590 #if 0 591 { 592 info.si_signo = SIGSEGV; 593 info.si_errno = 0; 594 /* XXX: check env->error_code */ 595 info.si_code = TARGET_SEGV_MAPERR; 596 info._sifields._sigfault._addr = env->mmuregs[4]; 597 queue_signal(env, info.si_signo, &info); 598 } 599 #endif 600 break; 601 #else 602 case TT_SPILL: /* window overflow */ 603 save_window(env); 604 break; 605 case TT_FILL: /* window underflow */ 606 restore_window(env); 607 break; 608 case TT_TFAULT: 609 case TT_DFAULT: 610 #if 0 611 { 612 info.si_signo = SIGSEGV; 613 info.si_errno = 0; 614 /* XXX: check env->error_code */ 615 info.si_code = TARGET_SEGV_MAPERR; 616 if (trapnr == TT_DFAULT) 617 info._sifields._sigfault._addr = env->dmmuregs[4]; 618 else 619 info._sifields._sigfault._addr = env->tsptr->tpc; 620 //queue_signal(env, info.si_signo, &info); 621 } 622 #endif 623 break; 624 #endif 625 case EXCP_INTERRUPT: 626 /* just indicate that signals should be handled asap */ 627 break; 628 case EXCP_DEBUG: 629 { 630 #if 0 631 int sig = 632 #endif 633 gdb_handlesig(cs, TARGET_SIGTRAP); 634 #if 0 635 if (sig) 636 { 637 info.si_signo = sig; 638 info.si_errno = 0; 639 info.si_code = TARGET_TRAP_BRKPT; 640 //queue_signal(env, info.si_signo, &info); 641 } 642 #endif 643 } 644 break; 645 default: 646 #ifdef TARGET_SPARC64 647 badtrap: 648 #endif 649 printf ("Unhandled trap: 0x%x\n", trapnr); 650 cpu_dump_state(cs, stderr, 0); 651 exit (1); 652 } 653 process_pending_signals (env); 654 } 655 } 656 657 #endif 658 659 static void usage(void) 660 { 661 printf("qemu-" TARGET_NAME " version " QEMU_FULL_VERSION 662 "\n" QEMU_COPYRIGHT "\n" 663 "usage: qemu-" TARGET_NAME " [options] program [arguments...]\n" 664 "BSD CPU emulator (compiled for %s emulation)\n" 665 "\n" 666 "Standard options:\n" 667 "-h print this help\n" 668 "-g port wait gdb connection to port\n" 669 "-L path set the elf interpreter prefix (default=%s)\n" 670 "-s size set the stack size in bytes (default=%ld)\n" 671 "-cpu model select CPU (-cpu help for list)\n" 672 "-drop-ld-preload drop LD_PRELOAD for target process\n" 673 "-E var=value sets/modifies targets environment variable(s)\n" 674 "-U var unsets targets environment variable(s)\n" 675 "-B address set guest_base address to address\n" 676 "-bsd type select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n" 677 "\n" 678 "Debug options:\n" 679 "-d item1[,...] enable logging of specified items\n" 680 " (use '-d help' for a list of log items)\n" 681 "-D logfile write logs to 'logfile' (default stderr)\n" 682 "-p pagesize set the host page size to 'pagesize'\n" 683 "-singlestep always run in singlestep mode\n" 684 "-strace log system calls\n" 685 "-trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" 686 " specify tracing options\n" 687 "\n" 688 "Environment variables:\n" 689 "QEMU_STRACE Print system calls and arguments similar to the\n" 690 " 'strace' program. Enable by setting to any value.\n" 691 "You can use -E and -U options to set/unset environment variables\n" 692 "for target process. It is possible to provide several variables\n" 693 "by repeating the option. For example:\n" 694 " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n" 695 "Note that if you provide several changes to single variable\n" 696 "last change will stay in effect.\n" 697 "\n" 698 QEMU_HELP_BOTTOM "\n" 699 , 700 TARGET_NAME, 701 interp_prefix, 702 x86_stack_size); 703 exit(1); 704 } 705 706 THREAD CPUState *thread_cpu; 707 708 bool qemu_cpu_is_self(CPUState *cpu) 709 { 710 return thread_cpu == cpu; 711 } 712 713 void qemu_cpu_kick(CPUState *cpu) 714 { 715 cpu_exit(cpu); 716 } 717 718 /* Assumes contents are already zeroed. */ 719 void init_task_state(TaskState *ts) 720 { 721 int i; 722 723 ts->used = 1; 724 ts->first_free = ts->sigqueue_table; 725 for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) { 726 ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1]; 727 } 728 ts->sigqueue_table[i].next = NULL; 729 } 730 731 int main(int argc, char **argv) 732 { 733 const char *filename; 734 const char *cpu_model; 735 const char *cpu_type; 736 const char *log_file = NULL; 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 CPUState *cpu; 743 int optind; 744 const char *r; 745 const char *gdbstub = NULL; 746 char **target_environ, **wrk; 747 envlist_t *envlist = NULL; 748 bsd_type = target_openbsd; 749 750 if (argc <= 1) 751 usage(); 752 753 error_init(argv[0]); 754 module_call_init(MODULE_INIT_TRACE); 755 qemu_init_cpu_list(); 756 module_call_init(MODULE_INIT_QOM); 757 758 envlist = envlist_create(); 759 760 /* add current environment into the list */ 761 for (wrk = environ; *wrk != NULL; wrk++) { 762 (void) envlist_setenv(envlist, *wrk); 763 } 764 765 cpu_model = NULL; 766 767 qemu_add_opts(&qemu_trace_opts); 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 envlist = envlist_create(); 797 } else if (!strcmp(r, "U")) { 798 r = argv[optind++]; 799 if (envlist_unsetenv(envlist, r) != 0) 800 usage(); 801 } else if (!strcmp(r, "s")) { 802 r = argv[optind++]; 803 x86_stack_size = strtol(r, (char **)&r, 0); 804 if (x86_stack_size <= 0) 805 usage(); 806 if (*r == 'M') 807 x86_stack_size *= MiB; 808 else if (*r == 'k' || *r == 'K') 809 x86_stack_size *= KiB; 810 } else if (!strcmp(r, "L")) { 811 interp_prefix = argv[optind++]; 812 } else if (!strcmp(r, "p")) { 813 qemu_host_page_size = atoi(argv[optind++]); 814 if (qemu_host_page_size == 0 || 815 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) { 816 fprintf(stderr, "page size must be a power of two\n"); 817 exit(1); 818 } 819 } else if (!strcmp(r, "g")) { 820 gdbstub = g_strdup(argv[optind++]); 821 } else if (!strcmp(r, "r")) { 822 qemu_uname_release = argv[optind++]; 823 } else if (!strcmp(r, "cpu")) { 824 cpu_model = argv[optind++]; 825 if (is_help_option(cpu_model)) { 826 /* XXX: implement xxx_cpu_list for targets that still miss it */ 827 #if defined(cpu_list) 828 cpu_list(); 829 #endif 830 exit(1); 831 } 832 } else if (!strcmp(r, "B")) { 833 guest_base = strtol(argv[optind++], NULL, 0); 834 have_guest_base = true; 835 } else if (!strcmp(r, "drop-ld-preload")) { 836 (void) envlist_unsetenv(envlist, "LD_PRELOAD"); 837 } else if (!strcmp(r, "bsd")) { 838 if (!strcasecmp(argv[optind], "freebsd")) { 839 bsd_type = target_freebsd; 840 } else if (!strcasecmp(argv[optind], "netbsd")) { 841 bsd_type = target_netbsd; 842 } else if (!strcasecmp(argv[optind], "openbsd")) { 843 bsd_type = target_openbsd; 844 } else { 845 usage(); 846 } 847 optind++; 848 } else if (!strcmp(r, "singlestep")) { 849 singlestep = 1; 850 } else if (!strcmp(r, "strace")) { 851 do_strace = 1; 852 } else if (!strcmp(r, "trace")) { 853 trace_opt_parse(optarg); 854 } else { 855 usage(); 856 } 857 } 858 859 /* init debug */ 860 qemu_log_needs_buffers(); 861 qemu_set_log_filename(log_file, &error_fatal); 862 if (log_mask) { 863 int mask; 864 865 mask = qemu_str_to_log_mask(log_mask); 866 if (!mask) { 867 qemu_print_log_usage(stdout); 868 exit(1); 869 } 870 qemu_set_log(mask); 871 } 872 873 if (optind >= argc) { 874 usage(); 875 } 876 filename = argv[optind]; 877 878 if (!trace_init_backends()) { 879 exit(1); 880 } 881 trace_init_file(); 882 883 /* Zero out regs */ 884 memset(regs, 0, sizeof(struct target_pt_regs)); 885 886 /* Zero out image_info */ 887 memset(info, 0, sizeof(struct image_info)); 888 889 /* Scan interp_prefix dir for replacement files. */ 890 init_paths(interp_prefix); 891 892 if (cpu_model == NULL) { 893 #if defined(TARGET_I386) 894 #ifdef TARGET_X86_64 895 cpu_model = "qemu64"; 896 #else 897 cpu_model = "qemu32"; 898 #endif 899 #elif defined(TARGET_SPARC) 900 #ifdef TARGET_SPARC64 901 cpu_model = "TI UltraSparc II"; 902 #else 903 cpu_model = "Fujitsu MB86904"; 904 #endif 905 #else 906 cpu_model = "any"; 907 #endif 908 } 909 910 /* init tcg before creating CPUs and to get qemu_host_page_size */ 911 tcg_exec_init(0); 912 913 cpu_type = parse_cpu_option(cpu_model); 914 cpu = cpu_create(cpu_type); 915 env = cpu->env_ptr; 916 #if defined(TARGET_SPARC) || defined(TARGET_PPC) 917 cpu_reset(cpu); 918 #endif 919 thread_cpu = cpu; 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 /* 929 * Now that page sizes are configured in tcg_exec_init() we can do 930 * proper page alignment for guest_base. 931 */ 932 guest_base = HOST_PAGE_ALIGN(guest_base); 933 934 /* 935 * Read in mmap_min_addr kernel parameter. This value is used 936 * When loading the ELF image to determine whether guest_base 937 * is needed. 938 * 939 * When user has explicitly set the quest base, we skip this 940 * test. 941 */ 942 if (!have_guest_base) { 943 FILE *fp; 944 945 if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) { 946 unsigned long tmp; 947 if (fscanf(fp, "%lu", &tmp) == 1) { 948 mmap_min_addr = tmp; 949 qemu_log_mask(CPU_LOG_PAGE, "host mmap_min_addr=0x%lx\n", mmap_min_addr); 950 } 951 fclose(fp); 952 } 953 } 954 955 if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) { 956 printf("Error loading %s\n", filename); 957 _exit(1); 958 } 959 960 for (wrk = target_environ; *wrk; wrk++) { 961 g_free(*wrk); 962 } 963 964 g_free(target_environ); 965 966 if (qemu_loglevel_mask(CPU_LOG_PAGE)) { 967 qemu_log("guest_base 0x%lx\n", guest_base); 968 log_page_dump("binary load"); 969 970 qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk); 971 qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code); 972 qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n", 973 info->start_code); 974 qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n", 975 info->start_data); 976 qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data); 977 qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n", 978 info->start_stack); 979 qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk); 980 qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry); 981 } 982 983 target_set_brk(info->brk); 984 syscall_init(); 985 signal_init(); 986 987 /* Now that we've loaded the binary, GUEST_BASE is fixed. Delay 988 generating the prologue until now so that the prologue can take 989 the real value of GUEST_BASE into account. */ 990 tcg_prologue_init(tcg_ctx); 991 tcg_region_init(); 992 993 /* build Task State */ 994 memset(ts, 0, sizeof(TaskState)); 995 init_task_state(ts); 996 ts->info = info; 997 cpu->opaque = ts; 998 999 #if defined(TARGET_I386) 1000 env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK; 1001 env->hflags |= HF_PE_MASK | HF_CPL_MASK; 1002 if (env->features[FEAT_1_EDX] & CPUID_SSE) { 1003 env->cr[4] |= CR4_OSFXSR_MASK; 1004 env->hflags |= HF_OSFXSR_MASK; 1005 } 1006 #ifndef TARGET_ABI32 1007 /* enable 64 bit mode if possible */ 1008 if (!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM)) { 1009 fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n"); 1010 exit(1); 1011 } 1012 env->cr[4] |= CR4_PAE_MASK; 1013 env->efer |= MSR_EFER_LMA | MSR_EFER_LME; 1014 env->hflags |= HF_LMA_MASK; 1015 #endif 1016 1017 /* flags setup : we activate the IRQs by default as in user mode */ 1018 env->eflags |= IF_MASK; 1019 1020 /* linux register setup */ 1021 #ifndef TARGET_ABI32 1022 env->regs[R_EAX] = regs->rax; 1023 env->regs[R_EBX] = regs->rbx; 1024 env->regs[R_ECX] = regs->rcx; 1025 env->regs[R_EDX] = regs->rdx; 1026 env->regs[R_ESI] = regs->rsi; 1027 env->regs[R_EDI] = regs->rdi; 1028 env->regs[R_EBP] = regs->rbp; 1029 env->regs[R_ESP] = regs->rsp; 1030 env->eip = regs->rip; 1031 #else 1032 env->regs[R_EAX] = regs->eax; 1033 env->regs[R_EBX] = regs->ebx; 1034 env->regs[R_ECX] = regs->ecx; 1035 env->regs[R_EDX] = regs->edx; 1036 env->regs[R_ESI] = regs->esi; 1037 env->regs[R_EDI] = regs->edi; 1038 env->regs[R_EBP] = regs->ebp; 1039 env->regs[R_ESP] = regs->esp; 1040 env->eip = regs->eip; 1041 #endif 1042 1043 /* linux interrupt setup */ 1044 #ifndef TARGET_ABI32 1045 env->idt.limit = 511; 1046 #else 1047 env->idt.limit = 255; 1048 #endif 1049 env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1), 1050 PROT_READ|PROT_WRITE, 1051 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); 1052 idt_table = g2h(env->idt.base); 1053 set_idt(0, 0); 1054 set_idt(1, 0); 1055 set_idt(2, 0); 1056 set_idt(3, 3); 1057 set_idt(4, 3); 1058 set_idt(5, 0); 1059 set_idt(6, 0); 1060 set_idt(7, 0); 1061 set_idt(8, 0); 1062 set_idt(9, 0); 1063 set_idt(10, 0); 1064 set_idt(11, 0); 1065 set_idt(12, 0); 1066 set_idt(13, 0); 1067 set_idt(14, 0); 1068 set_idt(15, 0); 1069 set_idt(16, 0); 1070 set_idt(17, 0); 1071 set_idt(18, 0); 1072 set_idt(19, 0); 1073 set_idt(0x80, 3); 1074 1075 /* linux segment setup */ 1076 { 1077 uint64_t *gdt_table; 1078 env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES, 1079 PROT_READ|PROT_WRITE, 1080 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); 1081 env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1; 1082 gdt_table = g2h(env->gdt.base); 1083 #ifdef TARGET_ABI32 1084 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff, 1085 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 1086 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT)); 1087 #else 1088 /* 64 bit code segment */ 1089 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff, 1090 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 1091 DESC_L_MASK | 1092 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT)); 1093 #endif 1094 write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff, 1095 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 1096 (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT)); 1097 } 1098 1099 cpu_x86_load_seg(env, R_CS, __USER_CS); 1100 cpu_x86_load_seg(env, R_SS, __USER_DS); 1101 #ifdef TARGET_ABI32 1102 cpu_x86_load_seg(env, R_DS, __USER_DS); 1103 cpu_x86_load_seg(env, R_ES, __USER_DS); 1104 cpu_x86_load_seg(env, R_FS, __USER_DS); 1105 cpu_x86_load_seg(env, R_GS, __USER_DS); 1106 /* This hack makes Wine work... */ 1107 env->segs[R_FS].selector = 0; 1108 #else 1109 cpu_x86_load_seg(env, R_DS, 0); 1110 cpu_x86_load_seg(env, R_ES, 0); 1111 cpu_x86_load_seg(env, R_FS, 0); 1112 cpu_x86_load_seg(env, R_GS, 0); 1113 #endif 1114 #elif defined(TARGET_SPARC) 1115 { 1116 int i; 1117 env->pc = regs->pc; 1118 env->npc = regs->npc; 1119 env->y = regs->y; 1120 for(i = 0; i < 8; i++) 1121 env->gregs[i] = regs->u_regs[i]; 1122 for(i = 0; i < 8; i++) 1123 env->regwptr[i] = regs->u_regs[i + 8]; 1124 } 1125 #else 1126 #error unsupported target CPU 1127 #endif 1128 1129 if (gdbstub) { 1130 gdbserver_start(gdbstub); 1131 gdb_handlesig(cpu, 0); 1132 } 1133 cpu_loop(env); 1134 /* never exits */ 1135 return 0; 1136 } 1137