1 /* 2 * qemu user main 3 * 4 * Copyright (c) 2003-2008 Fabrice Bellard 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, see <http://www.gnu.org/licenses/>. 18 */ 19 #include "qemu/osdep.h" 20 #include <machine/trap.h> 21 #include <sys/mman.h> 22 23 #include "qemu.h" 24 #include "qemu-common.h" 25 /* For tb_lock */ 26 #include "cpu.h" 27 #include "tcg.h" 28 #include "qemu/timer.h" 29 #include "qemu/envlist.h" 30 #include "exec/log.h" 31 32 int singlestep; 33 unsigned long mmap_min_addr; 34 unsigned long guest_base; 35 int have_guest_base; 36 unsigned long reserved_va; 37 38 static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX; 39 const char *qemu_uname_release; 40 extern char **environ; 41 enum BSDType bsd_type; 42 43 /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so 44 we allocate a bigger stack. Need a better solution, for example 45 by remapping the process stack directly at the right place */ 46 unsigned long x86_stack_size = 512 * 1024; 47 48 void gemu_log(const char *fmt, ...) 49 { 50 va_list ap; 51 52 va_start(ap, fmt); 53 vfprintf(stderr, fmt, ap); 54 va_end(ap); 55 } 56 57 #if defined(TARGET_I386) 58 int cpu_get_pic_interrupt(CPUX86State *env) 59 { 60 return -1; 61 } 62 #endif 63 64 /* These are no-ops because we are not threadsafe. */ 65 static inline void cpu_exec_start(CPUArchState *env) 66 { 67 } 68 69 static inline void cpu_exec_end(CPUArchState *env) 70 { 71 } 72 73 static inline void start_exclusive(void) 74 { 75 } 76 77 static inline void end_exclusive(void) 78 { 79 } 80 81 void fork_start(void) 82 { 83 } 84 85 void fork_end(int child) 86 { 87 if (child) { 88 gdbserver_fork(thread_cpu); 89 } 90 } 91 92 void cpu_list_lock(void) 93 { 94 } 95 96 void cpu_list_unlock(void) 97 { 98 } 99 100 #ifdef TARGET_I386 101 /***********************************************************/ 102 /* CPUX86 core interface */ 103 104 uint64_t cpu_get_tsc(CPUX86State *env) 105 { 106 return cpu_get_host_ticks(); 107 } 108 109 static void write_dt(void *ptr, unsigned long addr, unsigned long limit, 110 int flags) 111 { 112 unsigned int e1, e2; 113 uint32_t *p; 114 e1 = (addr << 16) | (limit & 0xffff); 115 e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000); 116 e2 |= flags; 117 p = ptr; 118 p[0] = tswap32(e1); 119 p[1] = tswap32(e2); 120 } 121 122 static uint64_t *idt_table; 123 #ifdef TARGET_X86_64 124 static void set_gate64(void *ptr, unsigned int type, unsigned int dpl, 125 uint64_t addr, unsigned int sel) 126 { 127 uint32_t *p, e1, e2; 128 e1 = (addr & 0xffff) | (sel << 16); 129 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8); 130 p = ptr; 131 p[0] = tswap32(e1); 132 p[1] = tswap32(e2); 133 p[2] = tswap32(addr >> 32); 134 p[3] = 0; 135 } 136 /* only dpl matters as we do only user space emulation */ 137 static void set_idt(int n, unsigned int dpl) 138 { 139 set_gate64(idt_table + n * 2, 0, dpl, 0, 0); 140 } 141 #else 142 static void set_gate(void *ptr, unsigned int type, unsigned int dpl, 143 uint32_t addr, unsigned int sel) 144 { 145 uint32_t *p, e1, e2; 146 e1 = (addr & 0xffff) | (sel << 16); 147 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8); 148 p = ptr; 149 p[0] = tswap32(e1); 150 p[1] = tswap32(e2); 151 } 152 153 /* only dpl matters as we do only user space emulation */ 154 static void set_idt(int n, unsigned int dpl) 155 { 156 set_gate(idt_table + n, 0, dpl, 0, 0); 157 } 158 #endif 159 160 void cpu_loop(CPUX86State *env) 161 { 162 X86CPU *cpu = x86_env_get_cpu(env); 163 CPUState *cs = CPU(cpu); 164 int trapnr; 165 abi_ulong pc; 166 //target_siginfo_t info; 167 168 for(;;) { 169 trapnr = cpu_x86_exec(cs); 170 switch(trapnr) { 171 case 0x80: 172 /* syscall from int $0x80 */ 173 if (bsd_type == target_freebsd) { 174 abi_ulong params = (abi_ulong) env->regs[R_ESP] + 175 sizeof(int32_t); 176 int32_t syscall_nr = env->regs[R_EAX]; 177 int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8; 178 179 if (syscall_nr == TARGET_FREEBSD_NR_syscall) { 180 get_user_s32(syscall_nr, params); 181 params += sizeof(int32_t); 182 } else if (syscall_nr == TARGET_FREEBSD_NR___syscall) { 183 get_user_s32(syscall_nr, params); 184 params += sizeof(int64_t); 185 } 186 get_user_s32(arg1, params); 187 params += sizeof(int32_t); 188 get_user_s32(arg2, params); 189 params += sizeof(int32_t); 190 get_user_s32(arg3, params); 191 params += sizeof(int32_t); 192 get_user_s32(arg4, params); 193 params += sizeof(int32_t); 194 get_user_s32(arg5, params); 195 params += sizeof(int32_t); 196 get_user_s32(arg6, params); 197 params += sizeof(int32_t); 198 get_user_s32(arg7, params); 199 params += sizeof(int32_t); 200 get_user_s32(arg8, params); 201 env->regs[R_EAX] = do_freebsd_syscall(env, 202 syscall_nr, 203 arg1, 204 arg2, 205 arg3, 206 arg4, 207 arg5, 208 arg6, 209 arg7, 210 arg8); 211 } else { //if (bsd_type == target_openbsd) 212 env->regs[R_EAX] = do_openbsd_syscall(env, 213 env->regs[R_EAX], 214 env->regs[R_EBX], 215 env->regs[R_ECX], 216 env->regs[R_EDX], 217 env->regs[R_ESI], 218 env->regs[R_EDI], 219 env->regs[R_EBP]); 220 } 221 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) { 222 env->regs[R_EAX] = -env->regs[R_EAX]; 223 env->eflags |= CC_C; 224 } else { 225 env->eflags &= ~CC_C; 226 } 227 break; 228 #ifndef TARGET_ABI32 229 case EXCP_SYSCALL: 230 /* syscall from syscall instruction */ 231 if (bsd_type == target_freebsd) 232 env->regs[R_EAX] = do_freebsd_syscall(env, 233 env->regs[R_EAX], 234 env->regs[R_EDI], 235 env->regs[R_ESI], 236 env->regs[R_EDX], 237 env->regs[R_ECX], 238 env->regs[8], 239 env->regs[9], 0, 0); 240 else { //if (bsd_type == target_openbsd) 241 env->regs[R_EAX] = do_openbsd_syscall(env, 242 env->regs[R_EAX], 243 env->regs[R_EDI], 244 env->regs[R_ESI], 245 env->regs[R_EDX], 246 env->regs[10], 247 env->regs[8], 248 env->regs[9]); 249 } 250 env->eip = env->exception_next_eip; 251 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) { 252 env->regs[R_EAX] = -env->regs[R_EAX]; 253 env->eflags |= CC_C; 254 } else { 255 env->eflags &= ~CC_C; 256 } 257 break; 258 #endif 259 #if 0 260 case EXCP0B_NOSEG: 261 case EXCP0C_STACK: 262 info.si_signo = SIGBUS; 263 info.si_errno = 0; 264 info.si_code = TARGET_SI_KERNEL; 265 info._sifields._sigfault._addr = 0; 266 queue_signal(env, info.si_signo, &info); 267 break; 268 case EXCP0D_GPF: 269 /* XXX: potential problem if ABI32 */ 270 #ifndef TARGET_X86_64 271 if (env->eflags & VM_MASK) { 272 handle_vm86_fault(env); 273 } else 274 #endif 275 { 276 info.si_signo = SIGSEGV; 277 info.si_errno = 0; 278 info.si_code = TARGET_SI_KERNEL; 279 info._sifields._sigfault._addr = 0; 280 queue_signal(env, info.si_signo, &info); 281 } 282 break; 283 case EXCP0E_PAGE: 284 info.si_signo = SIGSEGV; 285 info.si_errno = 0; 286 if (!(env->error_code & 1)) 287 info.si_code = TARGET_SEGV_MAPERR; 288 else 289 info.si_code = TARGET_SEGV_ACCERR; 290 info._sifields._sigfault._addr = env->cr[2]; 291 queue_signal(env, info.si_signo, &info); 292 break; 293 case EXCP00_DIVZ: 294 #ifndef TARGET_X86_64 295 if (env->eflags & VM_MASK) { 296 handle_vm86_trap(env, trapnr); 297 } else 298 #endif 299 { 300 /* division by zero */ 301 info.si_signo = SIGFPE; 302 info.si_errno = 0; 303 info.si_code = TARGET_FPE_INTDIV; 304 info._sifields._sigfault._addr = env->eip; 305 queue_signal(env, info.si_signo, &info); 306 } 307 break; 308 case EXCP01_DB: 309 case EXCP03_INT3: 310 #ifndef TARGET_X86_64 311 if (env->eflags & VM_MASK) { 312 handle_vm86_trap(env, trapnr); 313 } else 314 #endif 315 { 316 info.si_signo = SIGTRAP; 317 info.si_errno = 0; 318 if (trapnr == EXCP01_DB) { 319 info.si_code = TARGET_TRAP_BRKPT; 320 info._sifields._sigfault._addr = env->eip; 321 } else { 322 info.si_code = TARGET_SI_KERNEL; 323 info._sifields._sigfault._addr = 0; 324 } 325 queue_signal(env, info.si_signo, &info); 326 } 327 break; 328 case EXCP04_INTO: 329 case EXCP05_BOUND: 330 #ifndef TARGET_X86_64 331 if (env->eflags & VM_MASK) { 332 handle_vm86_trap(env, trapnr); 333 } else 334 #endif 335 { 336 info.si_signo = SIGSEGV; 337 info.si_errno = 0; 338 info.si_code = TARGET_SI_KERNEL; 339 info._sifields._sigfault._addr = 0; 340 queue_signal(env, info.si_signo, &info); 341 } 342 break; 343 case EXCP06_ILLOP: 344 info.si_signo = SIGILL; 345 info.si_errno = 0; 346 info.si_code = TARGET_ILL_ILLOPN; 347 info._sifields._sigfault._addr = env->eip; 348 queue_signal(env, info.si_signo, &info); 349 break; 350 #endif 351 case EXCP_INTERRUPT: 352 /* just indicate that signals should be handled asap */ 353 break; 354 #if 0 355 case EXCP_DEBUG: 356 { 357 int sig; 358 359 sig = gdb_handlesig (env, TARGET_SIGTRAP); 360 if (sig) 361 { 362 info.si_signo = sig; 363 info.si_errno = 0; 364 info.si_code = TARGET_TRAP_BRKPT; 365 queue_signal(env, info.si_signo, &info); 366 } 367 } 368 break; 369 #endif 370 default: 371 pc = env->segs[R_CS].base + env->eip; 372 fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n", 373 (long)pc, trapnr); 374 abort(); 375 } 376 process_pending_signals(env); 377 } 378 } 379 #endif 380 381 #ifdef TARGET_SPARC 382 #define SPARC64_STACK_BIAS 2047 383 384 //#define DEBUG_WIN 385 /* WARNING: dealing with register windows _is_ complicated. More info 386 can be found at http://www.sics.se/~psm/sparcstack.html */ 387 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index) 388 { 389 index = (index + cwp * 16) % (16 * env->nwindows); 390 /* wrap handling : if cwp is on the last window, then we use the 391 registers 'after' the end */ 392 if (index < 8 && env->cwp == env->nwindows - 1) 393 index += 16 * env->nwindows; 394 return index; 395 } 396 397 /* save the register window 'cwp1' */ 398 static inline void save_window_offset(CPUSPARCState *env, int cwp1) 399 { 400 unsigned int i; 401 abi_ulong sp_ptr; 402 403 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)]; 404 #ifdef TARGET_SPARC64 405 if (sp_ptr & 3) 406 sp_ptr += SPARC64_STACK_BIAS; 407 #endif 408 #if defined(DEBUG_WIN) 409 printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n", 410 sp_ptr, cwp1); 411 #endif 412 for(i = 0; i < 16; i++) { 413 /* FIXME - what to do if put_user() fails? */ 414 put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr); 415 sp_ptr += sizeof(abi_ulong); 416 } 417 } 418 419 static void save_window(CPUSPARCState *env) 420 { 421 #ifndef TARGET_SPARC64 422 unsigned int new_wim; 423 new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) & 424 ((1LL << env->nwindows) - 1); 425 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2)); 426 env->wim = new_wim; 427 #else 428 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2)); 429 env->cansave++; 430 env->canrestore--; 431 #endif 432 } 433 434 static void restore_window(CPUSPARCState *env) 435 { 436 #ifndef TARGET_SPARC64 437 unsigned int new_wim; 438 #endif 439 unsigned int i, cwp1; 440 abi_ulong sp_ptr; 441 442 #ifndef TARGET_SPARC64 443 new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) & 444 ((1LL << env->nwindows) - 1); 445 #endif 446 447 /* restore the invalid window */ 448 cwp1 = cpu_cwp_inc(env, env->cwp + 1); 449 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)]; 450 #ifdef TARGET_SPARC64 451 if (sp_ptr & 3) 452 sp_ptr += SPARC64_STACK_BIAS; 453 #endif 454 #if defined(DEBUG_WIN) 455 printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n", 456 sp_ptr, cwp1); 457 #endif 458 for(i = 0; i < 16; i++) { 459 /* FIXME - what to do if get_user() fails? */ 460 get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr); 461 sp_ptr += sizeof(abi_ulong); 462 } 463 #ifdef TARGET_SPARC64 464 env->canrestore++; 465 if (env->cleanwin < env->nwindows - 1) 466 env->cleanwin++; 467 env->cansave--; 468 #else 469 env->wim = new_wim; 470 #endif 471 } 472 473 static void flush_windows(CPUSPARCState *env) 474 { 475 int offset, cwp1; 476 477 offset = 1; 478 for(;;) { 479 /* if restore would invoke restore_window(), then we can stop */ 480 cwp1 = cpu_cwp_inc(env, env->cwp + offset); 481 #ifndef TARGET_SPARC64 482 if (env->wim & (1 << cwp1)) 483 break; 484 #else 485 if (env->canrestore == 0) 486 break; 487 env->cansave++; 488 env->canrestore--; 489 #endif 490 save_window_offset(env, cwp1); 491 offset++; 492 } 493 cwp1 = cpu_cwp_inc(env, env->cwp + 1); 494 #ifndef TARGET_SPARC64 495 /* set wim so that restore will reload the registers */ 496 env->wim = 1 << cwp1; 497 #endif 498 #if defined(DEBUG_WIN) 499 printf("flush_windows: nb=%d\n", offset - 1); 500 #endif 501 } 502 503 void cpu_loop(CPUSPARCState *env) 504 { 505 CPUState *cs = CPU(sparc_env_get_cpu(env)); 506 int trapnr, ret, syscall_nr; 507 //target_siginfo_t info; 508 509 while (1) { 510 trapnr = cpu_sparc_exec(cs); 511 512 switch (trapnr) { 513 #ifndef TARGET_SPARC64 514 case 0x80: 515 #else 516 /* FreeBSD uses 0x141 for syscalls too */ 517 case 0x141: 518 if (bsd_type != target_freebsd) 519 goto badtrap; 520 case 0x100: 521 #endif 522 syscall_nr = env->gregs[1]; 523 if (bsd_type == target_freebsd) 524 ret = do_freebsd_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], 0, 0); 528 else if (bsd_type == target_netbsd) 529 ret = do_netbsd_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 else { //if (bsd_type == target_openbsd) 534 #if defined(TARGET_SPARC64) 535 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG | 536 TARGET_OPENBSD_SYSCALL_G2RFLAG); 537 #endif 538 ret = do_openbsd_syscall(env, syscall_nr, 539 env->regwptr[0], env->regwptr[1], 540 env->regwptr[2], env->regwptr[3], 541 env->regwptr[4], env->regwptr[5]); 542 } 543 if ((unsigned int)ret >= (unsigned int)(-515)) { 544 ret = -ret; 545 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) 546 env->xcc |= PSR_CARRY; 547 #else 548 env->psr |= PSR_CARRY; 549 #endif 550 } else { 551 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) 552 env->xcc &= ~PSR_CARRY; 553 #else 554 env->psr &= ~PSR_CARRY; 555 #endif 556 } 557 env->regwptr[0] = ret; 558 /* next instruction */ 559 #if defined(TARGET_SPARC64) 560 if (bsd_type == target_openbsd && 561 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) { 562 env->pc = env->gregs[2]; 563 env->npc = env->pc + 4; 564 } else if (bsd_type == target_openbsd && 565 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) { 566 env->pc = env->gregs[7]; 567 env->npc = env->pc + 4; 568 } else { 569 env->pc = env->npc; 570 env->npc = env->npc + 4; 571 } 572 #else 573 env->pc = env->npc; 574 env->npc = env->npc + 4; 575 #endif 576 break; 577 case 0x83: /* flush windows */ 578 #ifdef TARGET_ABI32 579 case 0x103: 580 #endif 581 flush_windows(env); 582 /* next instruction */ 583 env->pc = env->npc; 584 env->npc = env->npc + 4; 585 break; 586 #ifndef TARGET_SPARC64 587 case TT_WIN_OVF: /* window overflow */ 588 save_window(env); 589 break; 590 case TT_WIN_UNF: /* window underflow */ 591 restore_window(env); 592 break; 593 case TT_TFAULT: 594 case TT_DFAULT: 595 #if 0 596 { 597 info.si_signo = SIGSEGV; 598 info.si_errno = 0; 599 /* XXX: check env->error_code */ 600 info.si_code = TARGET_SEGV_MAPERR; 601 info._sifields._sigfault._addr = env->mmuregs[4]; 602 queue_signal(env, info.si_signo, &info); 603 } 604 #endif 605 break; 606 #else 607 case TT_SPILL: /* window overflow */ 608 save_window(env); 609 break; 610 case TT_FILL: /* window underflow */ 611 restore_window(env); 612 break; 613 case TT_TFAULT: 614 case TT_DFAULT: 615 #if 0 616 { 617 info.si_signo = SIGSEGV; 618 info.si_errno = 0; 619 /* XXX: check env->error_code */ 620 info.si_code = TARGET_SEGV_MAPERR; 621 if (trapnr == TT_DFAULT) 622 info._sifields._sigfault._addr = env->dmmuregs[4]; 623 else 624 info._sifields._sigfault._addr = env->tsptr->tpc; 625 //queue_signal(env, info.si_signo, &info); 626 } 627 #endif 628 break; 629 #endif 630 case EXCP_INTERRUPT: 631 /* just indicate that signals should be handled asap */ 632 break; 633 case EXCP_DEBUG: 634 { 635 int sig; 636 637 sig = gdb_handlesig(cs, TARGET_SIGTRAP); 638 #if 0 639 if (sig) 640 { 641 info.si_signo = sig; 642 info.si_errno = 0; 643 info.si_code = TARGET_TRAP_BRKPT; 644 //queue_signal(env, info.si_signo, &info); 645 } 646 #endif 647 } 648 break; 649 default: 650 #ifdef TARGET_SPARC64 651 badtrap: 652 #endif 653 printf ("Unhandled trap: 0x%x\n", trapnr); 654 cpu_dump_state(cs, stderr, fprintf, 0); 655 exit (1); 656 } 657 process_pending_signals (env); 658 } 659 } 660 661 #endif 662 663 static void usage(void) 664 { 665 printf("qemu-" TARGET_NAME " version " QEMU_VERSION ", Copyright (c) 2003-2008 Fabrice Bellard\n" 666 "usage: qemu-" TARGET_NAME " [options] program [arguments...]\n" 667 "BSD CPU emulator (compiled for %s emulation)\n" 668 "\n" 669 "Standard options:\n" 670 "-h print this help\n" 671 "-g port wait gdb connection to port\n" 672 "-L path set the elf interpreter prefix (default=%s)\n" 673 "-s size set the stack size in bytes (default=%ld)\n" 674 "-cpu model select CPU (-cpu help for list)\n" 675 "-drop-ld-preload drop LD_PRELOAD for target process\n" 676 "-E var=value sets/modifies targets environment variable(s)\n" 677 "-U var unsets targets environment variable(s)\n" 678 "-B address set guest_base address to address\n" 679 "-bsd type select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n" 680 "\n" 681 "Debug options:\n" 682 "-d item1[,...] enable logging of specified items\n" 683 " (use '-d help' for a list of log items)\n" 684 "-D logfile write logs to 'logfile' (default stderr)\n" 685 "-p pagesize set the host page size to 'pagesize'\n" 686 "-singlestep always run in singlestep mode\n" 687 "-strace log system calls\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 , 699 TARGET_NAME, 700 interp_prefix, 701 x86_stack_size); 702 exit(1); 703 } 704 705 THREAD CPUState *thread_cpu; 706 707 /* Assumes contents are already zeroed. */ 708 void init_task_state(TaskState *ts) 709 { 710 int i; 711 712 ts->used = 1; 713 ts->first_free = ts->sigqueue_table; 714 for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) { 715 ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1]; 716 } 717 ts->sigqueue_table[i].next = NULL; 718 } 719 720 int main(int argc, char **argv) 721 { 722 const char *filename; 723 const char *cpu_model; 724 const char *log_file = NULL; 725 const char *log_mask = NULL; 726 struct target_pt_regs regs1, *regs = ®s1; 727 struct image_info info1, *info = &info1; 728 TaskState ts1, *ts = &ts1; 729 CPUArchState *env; 730 CPUState *cpu; 731 int optind; 732 const char *r; 733 int gdbstub_port = 0; 734 char **target_environ, **wrk; 735 envlist_t *envlist = NULL; 736 bsd_type = target_openbsd; 737 738 if (argc <= 1) 739 usage(); 740 741 module_call_init(MODULE_INIT_QOM); 742 743 if ((envlist = envlist_create()) == NULL) { 744 (void) fprintf(stderr, "Unable to allocate envlist\n"); 745 exit(1); 746 } 747 748 /* add current environment into the list */ 749 for (wrk = environ; *wrk != NULL; wrk++) { 750 (void) envlist_setenv(envlist, *wrk); 751 } 752 753 cpu_model = NULL; 754 #if defined(cpudef_setup) 755 cpudef_setup(); /* parse cpu definitions in target config file (TBD) */ 756 #endif 757 758 optind = 1; 759 for(;;) { 760 if (optind >= argc) 761 break; 762 r = argv[optind]; 763 if (r[0] != '-') 764 break; 765 optind++; 766 r++; 767 if (!strcmp(r, "-")) { 768 break; 769 } else if (!strcmp(r, "d")) { 770 if (optind >= argc) { 771 break; 772 } 773 log_mask = argv[optind++]; 774 } else if (!strcmp(r, "D")) { 775 if (optind >= argc) { 776 break; 777 } 778 log_file = argv[optind++]; 779 } else if (!strcmp(r, "E")) { 780 r = argv[optind++]; 781 if (envlist_setenv(envlist, r) != 0) 782 usage(); 783 } else if (!strcmp(r, "ignore-environment")) { 784 envlist_free(envlist); 785 if ((envlist = envlist_create()) == NULL) { 786 (void) fprintf(stderr, "Unable to allocate envlist\n"); 787 exit(1); 788 } 789 } else if (!strcmp(r, "U")) { 790 r = argv[optind++]; 791 if (envlist_unsetenv(envlist, r) != 0) 792 usage(); 793 } else if (!strcmp(r, "s")) { 794 r = argv[optind++]; 795 x86_stack_size = strtol(r, (char **)&r, 0); 796 if (x86_stack_size <= 0) 797 usage(); 798 if (*r == 'M') 799 x86_stack_size *= 1024 * 1024; 800 else if (*r == 'k' || *r == 'K') 801 x86_stack_size *= 1024; 802 } else if (!strcmp(r, "L")) { 803 interp_prefix = argv[optind++]; 804 } else if (!strcmp(r, "p")) { 805 qemu_host_page_size = atoi(argv[optind++]); 806 if (qemu_host_page_size == 0 || 807 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) { 808 fprintf(stderr, "page size must be a power of two\n"); 809 exit(1); 810 } 811 } else if (!strcmp(r, "g")) { 812 gdbstub_port = atoi(argv[optind++]); 813 } else if (!strcmp(r, "r")) { 814 qemu_uname_release = argv[optind++]; 815 } else if (!strcmp(r, "cpu")) { 816 cpu_model = argv[optind++]; 817 if (is_help_option(cpu_model)) { 818 /* XXX: implement xxx_cpu_list for targets that still miss it */ 819 #if defined(cpu_list) 820 cpu_list(stdout, &fprintf); 821 #endif 822 exit(1); 823 } 824 } else if (!strcmp(r, "B")) { 825 guest_base = strtol(argv[optind++], NULL, 0); 826 have_guest_base = 1; 827 } else if (!strcmp(r, "drop-ld-preload")) { 828 (void) envlist_unsetenv(envlist, "LD_PRELOAD"); 829 } else if (!strcmp(r, "bsd")) { 830 if (!strcasecmp(argv[optind], "freebsd")) { 831 bsd_type = target_freebsd; 832 } else if (!strcasecmp(argv[optind], "netbsd")) { 833 bsd_type = target_netbsd; 834 } else if (!strcasecmp(argv[optind], "openbsd")) { 835 bsd_type = target_openbsd; 836 } else { 837 usage(); 838 } 839 optind++; 840 } else if (!strcmp(r, "singlestep")) { 841 singlestep = 1; 842 } else if (!strcmp(r, "strace")) { 843 do_strace = 1; 844 } else 845 { 846 usage(); 847 } 848 } 849 850 /* init debug */ 851 qemu_set_log_filename(log_file); 852 if (log_mask) { 853 int mask; 854 855 mask = qemu_str_to_log_mask(log_mask); 856 if (!mask) { 857 qemu_print_log_usage(stdout); 858 exit(1); 859 } 860 qemu_set_log(mask); 861 } 862 863 if (optind >= argc) { 864 usage(); 865 } 866 filename = argv[optind]; 867 868 /* Zero out regs */ 869 memset(regs, 0, sizeof(struct target_pt_regs)); 870 871 /* Zero out image_info */ 872 memset(info, 0, sizeof(struct image_info)); 873 874 /* Scan interp_prefix dir for replacement files. */ 875 init_paths(interp_prefix); 876 877 if (cpu_model == NULL) { 878 #if defined(TARGET_I386) 879 #ifdef TARGET_X86_64 880 cpu_model = "qemu64"; 881 #else 882 cpu_model = "qemu32"; 883 #endif 884 #elif defined(TARGET_SPARC) 885 #ifdef TARGET_SPARC64 886 cpu_model = "TI UltraSparc II"; 887 #else 888 cpu_model = "Fujitsu MB86904"; 889 #endif 890 #else 891 cpu_model = "any"; 892 #endif 893 } 894 tcg_exec_init(0); 895 /* NOTE: we need to init the CPU at this stage to get 896 qemu_host_page_size */ 897 cpu = cpu_init(cpu_model); 898 if (!cpu) { 899 fprintf(stderr, "Unable to find CPU definition\n"); 900 exit(1); 901 } 902 env = cpu->env_ptr; 903 #if defined(TARGET_SPARC) || defined(TARGET_PPC) 904 cpu_reset(cpu); 905 #endif 906 thread_cpu = cpu; 907 908 if (getenv("QEMU_STRACE")) { 909 do_strace = 1; 910 } 911 912 target_environ = envlist_to_environ(envlist, NULL); 913 envlist_free(envlist); 914 915 /* 916 * Now that page sizes are configured in cpu_init() we can do 917 * proper page alignment for guest_base. 918 */ 919 guest_base = HOST_PAGE_ALIGN(guest_base); 920 921 /* 922 * Read in mmap_min_addr kernel parameter. This value is used 923 * When loading the ELF image to determine whether guest_base 924 * is needed. 925 * 926 * When user has explicitly set the quest base, we skip this 927 * test. 928 */ 929 if (!have_guest_base) { 930 FILE *fp; 931 932 if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) { 933 unsigned long tmp; 934 if (fscanf(fp, "%lu", &tmp) == 1) { 935 mmap_min_addr = tmp; 936 qemu_log_mask(CPU_LOG_PAGE, "host mmap_min_addr=0x%lx\n", mmap_min_addr); 937 } 938 fclose(fp); 939 } 940 } 941 942 if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) { 943 printf("Error loading %s\n", filename); 944 _exit(1); 945 } 946 947 for (wrk = target_environ; *wrk; wrk++) { 948 free(*wrk); 949 } 950 951 free(target_environ); 952 953 if (qemu_loglevel_mask(CPU_LOG_PAGE)) { 954 qemu_log("guest_base 0x%lx\n", guest_base); 955 log_page_dump(); 956 957 qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk); 958 qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code); 959 qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n", 960 info->start_code); 961 qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n", 962 info->start_data); 963 qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data); 964 qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n", 965 info->start_stack); 966 qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk); 967 qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry); 968 } 969 970 target_set_brk(info->brk); 971 syscall_init(); 972 signal_init(); 973 974 /* Now that we've loaded the binary, GUEST_BASE is fixed. Delay 975 generating the prologue until now so that the prologue can take 976 the real value of GUEST_BASE into account. */ 977 tcg_prologue_init(&tcg_ctx); 978 979 /* build Task State */ 980 memset(ts, 0, sizeof(TaskState)); 981 init_task_state(ts); 982 ts->info = info; 983 cpu->opaque = ts; 984 985 #if defined(TARGET_I386) 986 env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK; 987 env->hflags |= HF_PE_MASK | HF_CPL_MASK; 988 if (env->features[FEAT_1_EDX] & CPUID_SSE) { 989 env->cr[4] |= CR4_OSFXSR_MASK; 990 env->hflags |= HF_OSFXSR_MASK; 991 } 992 #ifndef TARGET_ABI32 993 /* enable 64 bit mode if possible */ 994 if (!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM)) { 995 fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n"); 996 exit(1); 997 } 998 env->cr[4] |= CR4_PAE_MASK; 999 env->efer |= MSR_EFER_LMA | MSR_EFER_LME; 1000 env->hflags |= HF_LMA_MASK; 1001 #endif 1002 1003 /* flags setup : we activate the IRQs by default as in user mode */ 1004 env->eflags |= IF_MASK; 1005 1006 /* linux register setup */ 1007 #ifndef TARGET_ABI32 1008 env->regs[R_EAX] = regs->rax; 1009 env->regs[R_EBX] = regs->rbx; 1010 env->regs[R_ECX] = regs->rcx; 1011 env->regs[R_EDX] = regs->rdx; 1012 env->regs[R_ESI] = regs->rsi; 1013 env->regs[R_EDI] = regs->rdi; 1014 env->regs[R_EBP] = regs->rbp; 1015 env->regs[R_ESP] = regs->rsp; 1016 env->eip = regs->rip; 1017 #else 1018 env->regs[R_EAX] = regs->eax; 1019 env->regs[R_EBX] = regs->ebx; 1020 env->regs[R_ECX] = regs->ecx; 1021 env->regs[R_EDX] = regs->edx; 1022 env->regs[R_ESI] = regs->esi; 1023 env->regs[R_EDI] = regs->edi; 1024 env->regs[R_EBP] = regs->ebp; 1025 env->regs[R_ESP] = regs->esp; 1026 env->eip = regs->eip; 1027 #endif 1028 1029 /* linux interrupt setup */ 1030 #ifndef TARGET_ABI32 1031 env->idt.limit = 511; 1032 #else 1033 env->idt.limit = 255; 1034 #endif 1035 env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1), 1036 PROT_READ|PROT_WRITE, 1037 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); 1038 idt_table = g2h(env->idt.base); 1039 set_idt(0, 0); 1040 set_idt(1, 0); 1041 set_idt(2, 0); 1042 set_idt(3, 3); 1043 set_idt(4, 3); 1044 set_idt(5, 0); 1045 set_idt(6, 0); 1046 set_idt(7, 0); 1047 set_idt(8, 0); 1048 set_idt(9, 0); 1049 set_idt(10, 0); 1050 set_idt(11, 0); 1051 set_idt(12, 0); 1052 set_idt(13, 0); 1053 set_idt(14, 0); 1054 set_idt(15, 0); 1055 set_idt(16, 0); 1056 set_idt(17, 0); 1057 set_idt(18, 0); 1058 set_idt(19, 0); 1059 set_idt(0x80, 3); 1060 1061 /* linux segment setup */ 1062 { 1063 uint64_t *gdt_table; 1064 env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES, 1065 PROT_READ|PROT_WRITE, 1066 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); 1067 env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1; 1068 gdt_table = g2h(env->gdt.base); 1069 #ifdef TARGET_ABI32 1070 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff, 1071 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 1072 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT)); 1073 #else 1074 /* 64 bit code segment */ 1075 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff, 1076 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 1077 DESC_L_MASK | 1078 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT)); 1079 #endif 1080 write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff, 1081 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 1082 (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT)); 1083 } 1084 1085 cpu_x86_load_seg(env, R_CS, __USER_CS); 1086 cpu_x86_load_seg(env, R_SS, __USER_DS); 1087 #ifdef TARGET_ABI32 1088 cpu_x86_load_seg(env, R_DS, __USER_DS); 1089 cpu_x86_load_seg(env, R_ES, __USER_DS); 1090 cpu_x86_load_seg(env, R_FS, __USER_DS); 1091 cpu_x86_load_seg(env, R_GS, __USER_DS); 1092 /* This hack makes Wine work... */ 1093 env->segs[R_FS].selector = 0; 1094 #else 1095 cpu_x86_load_seg(env, R_DS, 0); 1096 cpu_x86_load_seg(env, R_ES, 0); 1097 cpu_x86_load_seg(env, R_FS, 0); 1098 cpu_x86_load_seg(env, R_GS, 0); 1099 #endif 1100 #elif defined(TARGET_SPARC) 1101 { 1102 int i; 1103 env->pc = regs->pc; 1104 env->npc = regs->npc; 1105 env->y = regs->y; 1106 for(i = 0; i < 8; i++) 1107 env->gregs[i] = regs->u_regs[i]; 1108 for(i = 0; i < 8; i++) 1109 env->regwptr[i] = regs->u_regs[i + 8]; 1110 } 1111 #else 1112 #error unsupported target CPU 1113 #endif 1114 1115 if (gdbstub_port) { 1116 gdbserver_start (gdbstub_port); 1117 gdb_handlesig(cpu, 0); 1118 } 1119 cpu_loop(env); 1120 /* never exits */ 1121 return 0; 1122 } 1123