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 /* fallthrough */ 516 case 0x100: 517 #endif 518 syscall_nr = env->gregs[1]; 519 if (bsd_type == target_freebsd) 520 ret = do_freebsd_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], 0, 0); 524 else if (bsd_type == target_netbsd) 525 ret = do_netbsd_syscall(env, syscall_nr, 526 env->regwptr[0], env->regwptr[1], 527 env->regwptr[2], env->regwptr[3], 528 env->regwptr[4], env->regwptr[5]); 529 else { //if (bsd_type == target_openbsd) 530 #if defined(TARGET_SPARC64) 531 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG | 532 TARGET_OPENBSD_SYSCALL_G2RFLAG); 533 #endif 534 ret = do_openbsd_syscall(env, syscall_nr, 535 env->regwptr[0], env->regwptr[1], 536 env->regwptr[2], env->regwptr[3], 537 env->regwptr[4], env->regwptr[5]); 538 } 539 if ((unsigned int)ret >= (unsigned int)(-515)) { 540 ret = -ret; 541 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) 542 env->xcc |= PSR_CARRY; 543 #else 544 env->psr |= PSR_CARRY; 545 #endif 546 } else { 547 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) 548 env->xcc &= ~PSR_CARRY; 549 #else 550 env->psr &= ~PSR_CARRY; 551 #endif 552 } 553 env->regwptr[0] = ret; 554 /* next instruction */ 555 #if defined(TARGET_SPARC64) 556 if (bsd_type == target_openbsd && 557 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) { 558 env->pc = env->gregs[2]; 559 env->npc = env->pc + 4; 560 } else if (bsd_type == target_openbsd && 561 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) { 562 env->pc = env->gregs[7]; 563 env->npc = env->pc + 4; 564 } else { 565 env->pc = env->npc; 566 env->npc = env->npc + 4; 567 } 568 #else 569 env->pc = env->npc; 570 env->npc = env->npc + 4; 571 #endif 572 break; 573 case 0x83: /* flush windows */ 574 #ifdef TARGET_ABI32 575 case 0x103: 576 #endif 577 flush_windows(env); 578 /* next instruction */ 579 env->pc = env->npc; 580 env->npc = env->npc + 4; 581 break; 582 #ifndef TARGET_SPARC64 583 case TT_WIN_OVF: /* window overflow */ 584 save_window(env); 585 break; 586 case TT_WIN_UNF: /* window underflow */ 587 restore_window(env); 588 break; 589 case TT_TFAULT: 590 case TT_DFAULT: 591 #if 0 592 { 593 info.si_signo = SIGSEGV; 594 info.si_errno = 0; 595 /* XXX: check env->error_code */ 596 info.si_code = TARGET_SEGV_MAPERR; 597 info._sifields._sigfault._addr = env->mmuregs[4]; 598 queue_signal(env, info.si_signo, &info); 599 } 600 #endif 601 break; 602 #else 603 case TT_SPILL: /* window overflow */ 604 save_window(env); 605 break; 606 case TT_FILL: /* window underflow */ 607 restore_window(env); 608 break; 609 case TT_TFAULT: 610 case TT_DFAULT: 611 #if 0 612 { 613 info.si_signo = SIGSEGV; 614 info.si_errno = 0; 615 /* XXX: check env->error_code */ 616 info.si_code = TARGET_SEGV_MAPERR; 617 if (trapnr == TT_DFAULT) 618 info._sifields._sigfault._addr = env->dmmuregs[4]; 619 else 620 info._sifields._sigfault._addr = env->tsptr->tpc; 621 //queue_signal(env, info.si_signo, &info); 622 } 623 #endif 624 break; 625 #endif 626 case EXCP_INTERRUPT: 627 /* just indicate that signals should be handled asap */ 628 break; 629 case EXCP_DEBUG: 630 { 631 #if 0 632 int sig = 633 #endif 634 gdb_handlesig(cs, TARGET_SIGTRAP); 635 #if 0 636 if (sig) 637 { 638 info.si_signo = sig; 639 info.si_errno = 0; 640 info.si_code = TARGET_TRAP_BRKPT; 641 //queue_signal(env, info.si_signo, &info); 642 } 643 #endif 644 } 645 break; 646 default: 647 #ifdef TARGET_SPARC64 648 badtrap: 649 #endif 650 printf ("Unhandled trap: 0x%x\n", trapnr); 651 cpu_dump_state(cs, stderr, 0); 652 exit (1); 653 } 654 process_pending_signals (env); 655 } 656 } 657 658 #endif 659 660 static void usage(void) 661 { 662 printf("qemu-" TARGET_NAME " version " QEMU_FULL_VERSION 663 "\n" QEMU_COPYRIGHT "\n" 664 "usage: qemu-" TARGET_NAME " [options] program [arguments...]\n" 665 "BSD CPU emulator (compiled for %s emulation)\n" 666 "\n" 667 "Standard options:\n" 668 "-h print this help\n" 669 "-g port wait gdb connection to port\n" 670 "-L path set the elf interpreter prefix (default=%s)\n" 671 "-s size set the stack size in bytes (default=%ld)\n" 672 "-cpu model select CPU (-cpu help for list)\n" 673 "-drop-ld-preload drop LD_PRELOAD for target process\n" 674 "-E var=value sets/modifies targets environment variable(s)\n" 675 "-U var unsets targets environment variable(s)\n" 676 "-B address set guest_base address to address\n" 677 "-bsd type select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n" 678 "\n" 679 "Debug options:\n" 680 "-d item1[,...] enable logging of specified items\n" 681 " (use '-d help' for a list of log items)\n" 682 "-D logfile write logs to 'logfile' (default stderr)\n" 683 "-p pagesize set the host page size to 'pagesize'\n" 684 "-singlestep always run in singlestep mode\n" 685 "-strace log system calls\n" 686 "-trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" 687 " specify tracing options\n" 688 "\n" 689 "Environment variables:\n" 690 "QEMU_STRACE Print system calls and arguments similar to the\n" 691 " 'strace' program. Enable by setting to any value.\n" 692 "You can use -E and -U options to set/unset environment variables\n" 693 "for target process. It is possible to provide several variables\n" 694 "by repeating the option. For example:\n" 695 " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n" 696 "Note that if you provide several changes to single variable\n" 697 "last change will stay in effect.\n" 698 "\n" 699 QEMU_HELP_BOTTOM "\n" 700 , 701 TARGET_NAME, 702 interp_prefix, 703 x86_stack_size); 704 exit(1); 705 } 706 707 THREAD CPUState *thread_cpu; 708 709 bool qemu_cpu_is_self(CPUState *cpu) 710 { 711 return thread_cpu == cpu; 712 } 713 714 void qemu_cpu_kick(CPUState *cpu) 715 { 716 cpu_exit(cpu); 717 } 718 719 /* Assumes contents are already zeroed. */ 720 void init_task_state(TaskState *ts) 721 { 722 int i; 723 724 ts->used = 1; 725 ts->first_free = ts->sigqueue_table; 726 for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) { 727 ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1]; 728 } 729 ts->sigqueue_table[i].next = NULL; 730 } 731 732 int main(int argc, char **argv) 733 { 734 const char *filename; 735 const char *cpu_model; 736 const char *cpu_type; 737 const char *log_file = NULL; 738 const char *log_mask = NULL; 739 struct target_pt_regs regs1, *regs = ®s1; 740 struct image_info info1, *info = &info1; 741 TaskState ts1, *ts = &ts1; 742 CPUArchState *env; 743 CPUState *cpu; 744 int optind; 745 const char *r; 746 const char *gdbstub = NULL; 747 char **target_environ, **wrk; 748 envlist_t *envlist = NULL; 749 bsd_type = target_openbsd; 750 751 if (argc <= 1) 752 usage(); 753 754 error_init(argv[0]); 755 module_call_init(MODULE_INIT_TRACE); 756 qemu_init_cpu_list(); 757 module_call_init(MODULE_INIT_QOM); 758 759 envlist = envlist_create(); 760 761 /* add current environment into the list */ 762 for (wrk = environ; *wrk != NULL; wrk++) { 763 (void) envlist_setenv(envlist, *wrk); 764 } 765 766 cpu_model = NULL; 767 768 qemu_add_opts(&qemu_trace_opts); 769 770 optind = 1; 771 for (;;) { 772 if (optind >= argc) 773 break; 774 r = argv[optind]; 775 if (r[0] != '-') 776 break; 777 optind++; 778 r++; 779 if (!strcmp(r, "-")) { 780 break; 781 } else if (!strcmp(r, "d")) { 782 if (optind >= argc) { 783 break; 784 } 785 log_mask = argv[optind++]; 786 } else if (!strcmp(r, "D")) { 787 if (optind >= argc) { 788 break; 789 } 790 log_file = argv[optind++]; 791 } else if (!strcmp(r, "E")) { 792 r = argv[optind++]; 793 if (envlist_setenv(envlist, r) != 0) 794 usage(); 795 } else if (!strcmp(r, "ignore-environment")) { 796 envlist_free(envlist); 797 envlist = envlist_create(); 798 } else if (!strcmp(r, "U")) { 799 r = argv[optind++]; 800 if (envlist_unsetenv(envlist, r) != 0) 801 usage(); 802 } else if (!strcmp(r, "s")) { 803 r = argv[optind++]; 804 x86_stack_size = strtol(r, (char **)&r, 0); 805 if (x86_stack_size <= 0) 806 usage(); 807 if (*r == 'M') 808 x86_stack_size *= MiB; 809 else if (*r == 'k' || *r == 'K') 810 x86_stack_size *= KiB; 811 } else if (!strcmp(r, "L")) { 812 interp_prefix = argv[optind++]; 813 } else if (!strcmp(r, "p")) { 814 qemu_host_page_size = atoi(argv[optind++]); 815 if (qemu_host_page_size == 0 || 816 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) { 817 fprintf(stderr, "page size must be a power of two\n"); 818 exit(1); 819 } 820 } else if (!strcmp(r, "g")) { 821 gdbstub = g_strdup(argv[optind++]); 822 } else if (!strcmp(r, "r")) { 823 qemu_uname_release = argv[optind++]; 824 } else if (!strcmp(r, "cpu")) { 825 cpu_model = argv[optind++]; 826 if (is_help_option(cpu_model)) { 827 /* XXX: implement xxx_cpu_list for targets that still miss it */ 828 #if defined(cpu_list) 829 cpu_list(); 830 #endif 831 exit(1); 832 } 833 } else if (!strcmp(r, "B")) { 834 guest_base = strtol(argv[optind++], NULL, 0); 835 have_guest_base = true; 836 } else if (!strcmp(r, "drop-ld-preload")) { 837 (void) envlist_unsetenv(envlist, "LD_PRELOAD"); 838 } else if (!strcmp(r, "bsd")) { 839 if (!strcasecmp(argv[optind], "freebsd")) { 840 bsd_type = target_freebsd; 841 } else if (!strcasecmp(argv[optind], "netbsd")) { 842 bsd_type = target_netbsd; 843 } else if (!strcasecmp(argv[optind], "openbsd")) { 844 bsd_type = target_openbsd; 845 } else { 846 usage(); 847 } 848 optind++; 849 } else if (!strcmp(r, "singlestep")) { 850 singlestep = 1; 851 } else if (!strcmp(r, "strace")) { 852 do_strace = 1; 853 } else if (!strcmp(r, "trace")) { 854 trace_opt_parse(optarg); 855 } else { 856 usage(); 857 } 858 } 859 860 /* init debug */ 861 qemu_log_needs_buffers(); 862 qemu_set_log_filename(log_file, &error_fatal); 863 if (log_mask) { 864 int mask; 865 866 mask = qemu_str_to_log_mask(log_mask); 867 if (!mask) { 868 qemu_print_log_usage(stdout); 869 exit(1); 870 } 871 qemu_set_log(mask); 872 } 873 874 if (optind >= argc) { 875 usage(); 876 } 877 filename = argv[optind]; 878 879 if (!trace_init_backends()) { 880 exit(1); 881 } 882 trace_init_file(); 883 884 /* Zero out regs */ 885 memset(regs, 0, sizeof(struct target_pt_regs)); 886 887 /* Zero out image_info */ 888 memset(info, 0, sizeof(struct image_info)); 889 890 /* Scan interp_prefix dir for replacement files. */ 891 init_paths(interp_prefix); 892 893 if (cpu_model == NULL) { 894 #if defined(TARGET_I386) 895 #ifdef TARGET_X86_64 896 cpu_model = "qemu64"; 897 #else 898 cpu_model = "qemu32"; 899 #endif 900 #elif defined(TARGET_SPARC) 901 #ifdef TARGET_SPARC64 902 cpu_model = "TI UltraSparc II"; 903 #else 904 cpu_model = "Fujitsu MB86904"; 905 #endif 906 #else 907 cpu_model = "any"; 908 #endif 909 } 910 911 /* init tcg before creating CPUs and to get qemu_host_page_size */ 912 tcg_exec_init(0, false); 913 914 cpu_type = parse_cpu_option(cpu_model); 915 cpu = cpu_create(cpu_type); 916 env = cpu->env_ptr; 917 #if defined(TARGET_SPARC) || defined(TARGET_PPC) 918 cpu_reset(cpu); 919 #endif 920 thread_cpu = cpu; 921 922 if (getenv("QEMU_STRACE")) { 923 do_strace = 1; 924 } 925 926 target_environ = envlist_to_environ(envlist, NULL); 927 envlist_free(envlist); 928 929 /* 930 * Now that page sizes are configured in tcg_exec_init() we can do 931 * proper page alignment for guest_base. 932 */ 933 guest_base = HOST_PAGE_ALIGN(guest_base); 934 935 /* 936 * Read in mmap_min_addr kernel parameter. This value is used 937 * When loading the ELF image to determine whether guest_base 938 * is needed. 939 * 940 * When user has explicitly set the quest base, we skip this 941 * test. 942 */ 943 if (!have_guest_base) { 944 FILE *fp; 945 946 if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) { 947 unsigned long tmp; 948 if (fscanf(fp, "%lu", &tmp) == 1) { 949 mmap_min_addr = tmp; 950 qemu_log_mask(CPU_LOG_PAGE, "host mmap_min_addr=0x%lx\n", mmap_min_addr); 951 } 952 fclose(fp); 953 } 954 } 955 956 if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) { 957 printf("Error loading %s\n", filename); 958 _exit(1); 959 } 960 961 for (wrk = target_environ; *wrk; wrk++) { 962 g_free(*wrk); 963 } 964 965 g_free(target_environ); 966 967 if (qemu_loglevel_mask(CPU_LOG_PAGE)) { 968 qemu_log("guest_base 0x%lx\n", guest_base); 969 log_page_dump("binary load"); 970 971 qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk); 972 qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code); 973 qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n", 974 info->start_code); 975 qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n", 976 info->start_data); 977 qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data); 978 qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n", 979 info->start_stack); 980 qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk); 981 qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry); 982 } 983 984 target_set_brk(info->brk); 985 syscall_init(); 986 signal_init(); 987 988 /* Now that we've loaded the binary, GUEST_BASE is fixed. Delay 989 generating the prologue until now so that the prologue can take 990 the real value of GUEST_BASE into account. */ 991 tcg_prologue_init(tcg_ctx); 992 tcg_region_init(); 993 994 /* build Task State */ 995 memset(ts, 0, sizeof(TaskState)); 996 init_task_state(ts); 997 ts->info = info; 998 cpu->opaque = ts; 999 1000 #if defined(TARGET_I386) 1001 env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK; 1002 env->hflags |= HF_PE_MASK | HF_CPL_MASK; 1003 if (env->features[FEAT_1_EDX] & CPUID_SSE) { 1004 env->cr[4] |= CR4_OSFXSR_MASK; 1005 env->hflags |= HF_OSFXSR_MASK; 1006 } 1007 #ifndef TARGET_ABI32 1008 /* enable 64 bit mode if possible */ 1009 if (!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM)) { 1010 fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n"); 1011 exit(1); 1012 } 1013 env->cr[4] |= CR4_PAE_MASK; 1014 env->efer |= MSR_EFER_LMA | MSR_EFER_LME; 1015 env->hflags |= HF_LMA_MASK; 1016 #endif 1017 1018 /* flags setup : we activate the IRQs by default as in user mode */ 1019 env->eflags |= IF_MASK; 1020 1021 /* linux register setup */ 1022 #ifndef TARGET_ABI32 1023 env->regs[R_EAX] = regs->rax; 1024 env->regs[R_EBX] = regs->rbx; 1025 env->regs[R_ECX] = regs->rcx; 1026 env->regs[R_EDX] = regs->rdx; 1027 env->regs[R_ESI] = regs->rsi; 1028 env->regs[R_EDI] = regs->rdi; 1029 env->regs[R_EBP] = regs->rbp; 1030 env->regs[R_ESP] = regs->rsp; 1031 env->eip = regs->rip; 1032 #else 1033 env->regs[R_EAX] = regs->eax; 1034 env->regs[R_EBX] = regs->ebx; 1035 env->regs[R_ECX] = regs->ecx; 1036 env->regs[R_EDX] = regs->edx; 1037 env->regs[R_ESI] = regs->esi; 1038 env->regs[R_EDI] = regs->edi; 1039 env->regs[R_EBP] = regs->ebp; 1040 env->regs[R_ESP] = regs->esp; 1041 env->eip = regs->eip; 1042 #endif 1043 1044 /* linux interrupt setup */ 1045 #ifndef TARGET_ABI32 1046 env->idt.limit = 511; 1047 #else 1048 env->idt.limit = 255; 1049 #endif 1050 env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1), 1051 PROT_READ|PROT_WRITE, 1052 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); 1053 idt_table = g2h(env->idt.base); 1054 set_idt(0, 0); 1055 set_idt(1, 0); 1056 set_idt(2, 0); 1057 set_idt(3, 3); 1058 set_idt(4, 3); 1059 set_idt(5, 0); 1060 set_idt(6, 0); 1061 set_idt(7, 0); 1062 set_idt(8, 0); 1063 set_idt(9, 0); 1064 set_idt(10, 0); 1065 set_idt(11, 0); 1066 set_idt(12, 0); 1067 set_idt(13, 0); 1068 set_idt(14, 0); 1069 set_idt(15, 0); 1070 set_idt(16, 0); 1071 set_idt(17, 0); 1072 set_idt(18, 0); 1073 set_idt(19, 0); 1074 set_idt(0x80, 3); 1075 1076 /* linux segment setup */ 1077 { 1078 uint64_t *gdt_table; 1079 env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES, 1080 PROT_READ|PROT_WRITE, 1081 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); 1082 env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1; 1083 gdt_table = g2h(env->gdt.base); 1084 #ifdef TARGET_ABI32 1085 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff, 1086 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 1087 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT)); 1088 #else 1089 /* 64 bit code segment */ 1090 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff, 1091 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 1092 DESC_L_MASK | 1093 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT)); 1094 #endif 1095 write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff, 1096 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 1097 (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT)); 1098 } 1099 1100 cpu_x86_load_seg(env, R_CS, __USER_CS); 1101 cpu_x86_load_seg(env, R_SS, __USER_DS); 1102 #ifdef TARGET_ABI32 1103 cpu_x86_load_seg(env, R_DS, __USER_DS); 1104 cpu_x86_load_seg(env, R_ES, __USER_DS); 1105 cpu_x86_load_seg(env, R_FS, __USER_DS); 1106 cpu_x86_load_seg(env, R_GS, __USER_DS); 1107 /* This hack makes Wine work... */ 1108 env->segs[R_FS].selector = 0; 1109 #else 1110 cpu_x86_load_seg(env, R_DS, 0); 1111 cpu_x86_load_seg(env, R_ES, 0); 1112 cpu_x86_load_seg(env, R_FS, 0); 1113 cpu_x86_load_seg(env, R_GS, 0); 1114 #endif 1115 #elif defined(TARGET_SPARC) 1116 { 1117 int i; 1118 env->pc = regs->pc; 1119 env->npc = regs->npc; 1120 env->y = regs->y; 1121 for(i = 0; i < 8; i++) 1122 env->gregs[i] = regs->u_regs[i]; 1123 for(i = 0; i < 8; i++) 1124 env->regwptr[i] = regs->u_regs[i + 8]; 1125 } 1126 #else 1127 #error unsupported target CPU 1128 #endif 1129 1130 if (gdbstub) { 1131 gdbserver_start(gdbstub); 1132 gdb_handlesig(cpu, 0); 1133 } 1134 cpu_loop(env); 1135 /* never exits */ 1136 return 0; 1137 } 1138