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 "qemu/accel.h" 24 #include "sysemu/tcg.h" 25 #include "qemu-version.h" 26 #include <machine/trap.h> 27 28 #include "qapi/error.h" 29 #include "qemu.h" 30 #include "qemu/config-file.h" 31 #include "qemu/error-report.h" 32 #include "qemu/path.h" 33 #include "qemu/help_option.h" 34 #include "qemu/module.h" 35 #include "exec/exec-all.h" 36 #include "tcg/tcg.h" 37 #include "qemu/timer.h" 38 #include "qemu/envlist.h" 39 #include "qemu/cutils.h" 40 #include "exec/log.h" 41 #include "trace/control.h" 42 43 int singlestep; 44 unsigned long mmap_min_addr; 45 uintptr_t guest_base; 46 bool have_guest_base; 47 unsigned long reserved_va; 48 49 static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX; 50 const char *qemu_uname_release; 51 enum BSDType bsd_type; 52 53 /* 54 * XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so 55 * we allocate a bigger stack. Need a better solution, for example 56 * by remapping the process stack directly at the right place 57 */ 58 unsigned long x86_stack_size = 512 * 1024; 59 60 void gemu_log(const char *fmt, ...) 61 { 62 va_list ap; 63 64 va_start(ap, fmt); 65 vfprintf(stderr, fmt, ap); 66 va_end(ap); 67 } 68 69 #if defined(TARGET_I386) 70 int cpu_get_pic_interrupt(CPUX86State *env) 71 { 72 return -1; 73 } 74 #endif 75 76 void fork_start(void) 77 { 78 } 79 80 void fork_end(int child) 81 { 82 if (child) { 83 gdbserver_fork(thread_cpu); 84 } 85 } 86 87 #ifdef TARGET_I386 88 /***********************************************************/ 89 /* CPUX86 core interface */ 90 91 uint64_t cpu_get_tsc(CPUX86State *env) 92 { 93 return cpu_get_host_ticks(); 94 } 95 96 static void write_dt(void *ptr, unsigned long addr, unsigned long limit, 97 int flags) 98 { 99 unsigned int e1, e2; 100 uint32_t *p; 101 e1 = (addr << 16) | (limit & 0xffff); 102 e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000); 103 e2 |= flags; 104 p = ptr; 105 p[0] = tswap32(e1); 106 p[1] = tswap32(e2); 107 } 108 109 static uint64_t *idt_table; 110 #ifdef TARGET_X86_64 111 static void set_gate64(void *ptr, unsigned int type, unsigned int dpl, 112 uint64_t addr, unsigned int sel) 113 { 114 uint32_t *p, e1, e2; 115 e1 = (addr & 0xffff) | (sel << 16); 116 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8); 117 p = ptr; 118 p[0] = tswap32(e1); 119 p[1] = tswap32(e2); 120 p[2] = tswap32(addr >> 32); 121 p[3] = 0; 122 } 123 /* only dpl matters as we do only user space emulation */ 124 static void set_idt(int n, unsigned int dpl) 125 { 126 set_gate64(idt_table + n * 2, 0, dpl, 0, 0); 127 } 128 #else 129 static void set_gate(void *ptr, unsigned int type, unsigned int dpl, 130 uint32_t addr, unsigned int sel) 131 { 132 uint32_t *p, e1, e2; 133 e1 = (addr & 0xffff) | (sel << 16); 134 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8); 135 p = ptr; 136 p[0] = tswap32(e1); 137 p[1] = tswap32(e2); 138 } 139 140 /* only dpl matters as we do only user space emulation */ 141 static void set_idt(int n, unsigned int dpl) 142 { 143 set_gate(idt_table + n, 0, dpl, 0, 0); 144 } 145 #endif 146 147 void cpu_loop(CPUX86State *env) 148 { 149 CPUState *cs = env_cpu(env); 150 int trapnr; 151 abi_ulong pc; 152 /* target_siginfo_t info; */ 153 154 for (;;) { 155 cpu_exec_start(cs); 156 trapnr = cpu_exec(cs); 157 cpu_exec_end(cs); 158 process_queued_cpu_work(cs); 159 160 switch (trapnr) { 161 case 0x80: 162 /* syscall from int $0x80 */ 163 if (bsd_type == target_freebsd) { 164 abi_ulong params = (abi_ulong) env->regs[R_ESP] + 165 sizeof(int32_t); 166 int32_t syscall_nr = env->regs[R_EAX]; 167 int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8; 168 169 if (syscall_nr == TARGET_FREEBSD_NR_syscall) { 170 get_user_s32(syscall_nr, params); 171 params += sizeof(int32_t); 172 } else if (syscall_nr == TARGET_FREEBSD_NR___syscall) { 173 get_user_s32(syscall_nr, params); 174 params += sizeof(int64_t); 175 } 176 get_user_s32(arg1, params); 177 params += sizeof(int32_t); 178 get_user_s32(arg2, params); 179 params += sizeof(int32_t); 180 get_user_s32(arg3, params); 181 params += sizeof(int32_t); 182 get_user_s32(arg4, params); 183 params += sizeof(int32_t); 184 get_user_s32(arg5, params); 185 params += sizeof(int32_t); 186 get_user_s32(arg6, params); 187 params += sizeof(int32_t); 188 get_user_s32(arg7, params); 189 params += sizeof(int32_t); 190 get_user_s32(arg8, params); 191 env->regs[R_EAX] = do_freebsd_syscall(env, 192 syscall_nr, 193 arg1, 194 arg2, 195 arg3, 196 arg4, 197 arg5, 198 arg6, 199 arg7, 200 arg8); 201 } else { /* if (bsd_type == target_openbsd) */ 202 env->regs[R_EAX] = do_openbsd_syscall(env, 203 env->regs[R_EAX], 204 env->regs[R_EBX], 205 env->regs[R_ECX], 206 env->regs[R_EDX], 207 env->regs[R_ESI], 208 env->regs[R_EDI], 209 env->regs[R_EBP]); 210 } 211 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) { 212 env->regs[R_EAX] = -env->regs[R_EAX]; 213 env->eflags |= CC_C; 214 } else { 215 env->eflags &= ~CC_C; 216 } 217 break; 218 #ifndef TARGET_ABI32 219 case EXCP_SYSCALL: 220 /* syscall from syscall instruction */ 221 if (bsd_type == target_freebsd) { 222 env->regs[R_EAX] = do_freebsd_syscall(env, 223 env->regs[R_EAX], 224 env->regs[R_EDI], 225 env->regs[R_ESI], 226 env->regs[R_EDX], 227 env->regs[R_ECX], 228 env->regs[8], 229 env->regs[9], 0, 0); 230 } else { /* if (bsd_type == target_openbsd) */ 231 env->regs[R_EAX] = do_openbsd_syscall(env, 232 env->regs[R_EAX], 233 env->regs[R_EDI], 234 env->regs[R_ESI], 235 env->regs[R_EDX], 236 env->regs[10], 237 env->regs[8], 238 env->regs[9]); 239 } 240 env->eip = env->exception_next_eip; 241 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) { 242 env->regs[R_EAX] = -env->regs[R_EAX]; 243 env->eflags |= CC_C; 244 } else { 245 env->eflags &= ~CC_C; 246 } 247 break; 248 #endif 249 case EXCP_INTERRUPT: 250 /* just indicate that signals should be handled asap */ 251 break; 252 default: 253 pc = env->segs[R_CS].base + env->eip; 254 fprintf(stderr, 255 "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n", 256 (long)pc, trapnr); 257 abort(); 258 } 259 process_pending_signals(env); 260 } 261 } 262 #endif 263 264 #ifdef TARGET_SPARC 265 #define SPARC64_STACK_BIAS 2047 266 267 /* #define DEBUG_WIN */ 268 /* 269 * WARNING: dealing with register windows _is_ complicated. More info 270 * can be found at http://www.sics.se/~psm/sparcstack.html 271 */ 272 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index) 273 { 274 index = (index + cwp * 16) % (16 * env->nwindows); 275 /* 276 * wrap handling : if cwp is on the last window, then we use the 277 * registers 'after' the end 278 */ 279 if (index < 8 && env->cwp == env->nwindows - 1) { 280 index += 16 * env->nwindows; 281 } 282 return index; 283 } 284 285 /* save the register window 'cwp1' */ 286 static inline void save_window_offset(CPUSPARCState *env, int cwp1) 287 { 288 unsigned int i; 289 abi_ulong sp_ptr; 290 291 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)]; 292 #ifdef TARGET_SPARC64 293 if (sp_ptr & 3) { 294 sp_ptr += SPARC64_STACK_BIAS; 295 } 296 #endif 297 #if defined(DEBUG_WIN) 298 printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n", 299 sp_ptr, cwp1); 300 #endif 301 for (i = 0; i < 16; i++) { 302 /* FIXME - what to do if put_user() fails? */ 303 put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr); 304 sp_ptr += sizeof(abi_ulong); 305 } 306 } 307 308 static void save_window(CPUSPARCState *env) 309 { 310 #ifndef TARGET_SPARC64 311 unsigned int new_wim; 312 new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) & 313 ((1LL << env->nwindows) - 1); 314 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2)); 315 env->wim = new_wim; 316 #else 317 /* 318 * cansave is zero if the spill trap handler is triggered by `save` and 319 * nonzero if triggered by a `flushw` 320 */ 321 save_window_offset(env, cpu_cwp_dec(env, env->cwp - env->cansave - 2)); 322 env->cansave++; 323 env->canrestore--; 324 #endif 325 } 326 327 static void restore_window(CPUSPARCState *env) 328 { 329 #ifndef TARGET_SPARC64 330 unsigned int new_wim; 331 #endif 332 unsigned int i, cwp1; 333 abi_ulong sp_ptr; 334 335 #ifndef TARGET_SPARC64 336 new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) & 337 ((1LL << env->nwindows) - 1); 338 #endif 339 340 /* restore the invalid window */ 341 cwp1 = cpu_cwp_inc(env, env->cwp + 1); 342 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)]; 343 #ifdef TARGET_SPARC64 344 if (sp_ptr & 3) { 345 sp_ptr += SPARC64_STACK_BIAS; 346 } 347 #endif 348 #if defined(DEBUG_WIN) 349 printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n", 350 sp_ptr, cwp1); 351 #endif 352 for (i = 0; i < 16; i++) { 353 /* FIXME - what to do if get_user() fails? */ 354 get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr); 355 sp_ptr += sizeof(abi_ulong); 356 } 357 #ifdef TARGET_SPARC64 358 env->canrestore++; 359 if (env->cleanwin < env->nwindows - 1) { 360 env->cleanwin++; 361 } 362 env->cansave--; 363 #else 364 env->wim = new_wim; 365 #endif 366 } 367 368 static void flush_windows(CPUSPARCState *env) 369 { 370 int offset, cwp1; 371 372 offset = 1; 373 for (;;) { 374 /* if restore would invoke restore_window(), then we can stop */ 375 cwp1 = cpu_cwp_inc(env, env->cwp + offset); 376 #ifndef TARGET_SPARC64 377 if (env->wim & (1 << cwp1)) { 378 break; 379 } 380 #else 381 if (env->canrestore == 0) { 382 break; 383 } 384 env->cansave++; 385 env->canrestore--; 386 #endif 387 save_window_offset(env, cwp1); 388 offset++; 389 } 390 cwp1 = cpu_cwp_inc(env, env->cwp + 1); 391 #ifndef TARGET_SPARC64 392 /* set wim so that restore will reload the registers */ 393 env->wim = 1 << cwp1; 394 #endif 395 #if defined(DEBUG_WIN) 396 printf("flush_windows: nb=%d\n", offset - 1); 397 #endif 398 } 399 400 void cpu_loop(CPUSPARCState *env) 401 { 402 CPUState *cs = env_cpu(env); 403 int trapnr, ret, syscall_nr; 404 /* target_siginfo_t info; */ 405 406 while (1) { 407 cpu_exec_start(cs); 408 trapnr = cpu_exec(cs); 409 cpu_exec_end(cs); 410 process_queued_cpu_work(cs); 411 412 switch (trapnr) { 413 #ifndef TARGET_SPARC64 414 case 0x80: 415 #else 416 /* FreeBSD uses 0x141 for syscalls too */ 417 case 0x141: 418 if (bsd_type != target_freebsd) { 419 goto badtrap; 420 } 421 /* fallthrough */ 422 case 0x100: 423 #endif 424 syscall_nr = env->gregs[1]; 425 if (bsd_type == target_freebsd) 426 ret = do_freebsd_syscall(env, syscall_nr, 427 env->regwptr[0], env->regwptr[1], 428 env->regwptr[2], env->regwptr[3], 429 env->regwptr[4], env->regwptr[5], 430 0, 0); 431 else if (bsd_type == target_netbsd) 432 ret = do_netbsd_syscall(env, syscall_nr, 433 env->regwptr[0], env->regwptr[1], 434 env->regwptr[2], env->regwptr[3], 435 env->regwptr[4], env->regwptr[5]); 436 else { /* if (bsd_type == target_openbsd) */ 437 #if defined(TARGET_SPARC64) 438 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG | 439 TARGET_OPENBSD_SYSCALL_G2RFLAG); 440 #endif 441 ret = do_openbsd_syscall(env, syscall_nr, 442 env->regwptr[0], env->regwptr[1], 443 env->regwptr[2], env->regwptr[3], 444 env->regwptr[4], env->regwptr[5]); 445 } 446 if ((unsigned int)ret >= (unsigned int)(-515)) { 447 ret = -ret; 448 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) 449 env->xcc |= PSR_CARRY; 450 #else 451 env->psr |= PSR_CARRY; 452 #endif 453 } else { 454 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) 455 env->xcc &= ~PSR_CARRY; 456 #else 457 env->psr &= ~PSR_CARRY; 458 #endif 459 } 460 env->regwptr[0] = ret; 461 /* next instruction */ 462 #if defined(TARGET_SPARC64) 463 if (bsd_type == target_openbsd && 464 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) { 465 env->pc = env->gregs[2]; 466 env->npc = env->pc + 4; 467 } else if (bsd_type == target_openbsd && 468 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) { 469 env->pc = env->gregs[7]; 470 env->npc = env->pc + 4; 471 } else { 472 env->pc = env->npc; 473 env->npc = env->npc + 4; 474 } 475 #else 476 env->pc = env->npc; 477 env->npc = env->npc + 4; 478 #endif 479 break; 480 case 0x83: /* flush windows */ 481 #ifdef TARGET_ABI32 482 case 0x103: 483 #endif 484 flush_windows(env); 485 /* next instruction */ 486 env->pc = env->npc; 487 env->npc = env->npc + 4; 488 break; 489 #ifndef TARGET_SPARC64 490 case TT_WIN_OVF: /* window overflow */ 491 save_window(env); 492 break; 493 case TT_WIN_UNF: /* window underflow */ 494 restore_window(env); 495 break; 496 case TT_TFAULT: 497 case TT_DFAULT: 498 break; 499 #else 500 case TT_SPILL: /* window overflow */ 501 save_window(env); 502 break; 503 case TT_FILL: /* window underflow */ 504 restore_window(env); 505 break; 506 case TT_TFAULT: 507 case TT_DFAULT: 508 break; 509 #endif 510 case EXCP_INTERRUPT: 511 /* just indicate that signals should be handled asap */ 512 break; 513 case EXCP_DEBUG: 514 { 515 gdb_handlesig(cs, TARGET_SIGTRAP); 516 } 517 break; 518 default: 519 #ifdef TARGET_SPARC64 520 badtrap: 521 #endif 522 printf("Unhandled trap: 0x%x\n", trapnr); 523 cpu_dump_state(cs, stderr, 0); 524 exit(1); 525 } 526 process_pending_signals(env); 527 } 528 } 529 530 #endif 531 532 static void usage(void) 533 { 534 printf("qemu-" TARGET_NAME " version " QEMU_FULL_VERSION 535 "\n" QEMU_COPYRIGHT "\n" 536 "usage: qemu-" TARGET_NAME " [options] program [arguments...]\n" 537 "BSD CPU emulator (compiled for %s emulation)\n" 538 "\n" 539 "Standard options:\n" 540 "-h print this help\n" 541 "-g port wait gdb connection to port\n" 542 "-L path set the elf interpreter prefix (default=%s)\n" 543 "-s size set the stack size in bytes (default=%ld)\n" 544 "-cpu model select CPU (-cpu help for list)\n" 545 "-drop-ld-preload drop LD_PRELOAD for target process\n" 546 "-E var=value sets/modifies targets environment variable(s)\n" 547 "-U var unsets targets environment variable(s)\n" 548 "-B address set guest_base address to address\n" 549 "-bsd type select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n" 550 "\n" 551 "Debug options:\n" 552 "-d item1[,...] enable logging of specified items\n" 553 " (use '-d help' for a list of log items)\n" 554 "-D logfile write logs to 'logfile' (default stderr)\n" 555 "-p pagesize set the host page size to 'pagesize'\n" 556 "-singlestep always run in singlestep mode\n" 557 "-strace log system calls\n" 558 "-trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" 559 " specify tracing options\n" 560 "\n" 561 "Environment variables:\n" 562 "QEMU_STRACE Print system calls and arguments similar to the\n" 563 " 'strace' program. Enable by setting to any value.\n" 564 "You can use -E and -U options to set/unset environment variables\n" 565 "for target process. It is possible to provide several variables\n" 566 "by repeating the option. For example:\n" 567 " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n" 568 "Note that if you provide several changes to single variable\n" 569 "last change will stay in effect.\n" 570 "\n" 571 QEMU_HELP_BOTTOM "\n" 572 , 573 TARGET_NAME, 574 interp_prefix, 575 x86_stack_size); 576 exit(1); 577 } 578 579 THREAD CPUState *thread_cpu; 580 581 bool qemu_cpu_is_self(CPUState *cpu) 582 { 583 return thread_cpu == cpu; 584 } 585 586 void qemu_cpu_kick(CPUState *cpu) 587 { 588 cpu_exit(cpu); 589 } 590 591 /* Assumes contents are already zeroed. */ 592 void init_task_state(TaskState *ts) 593 { 594 int i; 595 596 ts->used = 1; 597 ts->first_free = ts->sigqueue_table; 598 for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) { 599 ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1]; 600 } 601 ts->sigqueue_table[i].next = NULL; 602 } 603 604 int main(int argc, char **argv) 605 { 606 const char *filename; 607 const char *cpu_model; 608 const char *cpu_type; 609 const char *log_file = NULL; 610 const char *log_mask = NULL; 611 struct target_pt_regs regs1, *regs = ®s1; 612 struct image_info info1, *info = &info1; 613 TaskState ts1, *ts = &ts1; 614 CPUArchState *env; 615 CPUState *cpu; 616 int optind, rv; 617 const char *r; 618 const char *gdbstub = NULL; 619 char **target_environ, **wrk; 620 envlist_t *envlist = NULL; 621 bsd_type = target_openbsd; 622 623 if (argc <= 1) { 624 usage(); 625 } 626 627 error_init(argv[0]); 628 module_call_init(MODULE_INIT_TRACE); 629 qemu_init_cpu_list(); 630 module_call_init(MODULE_INIT_QOM); 631 632 envlist = envlist_create(); 633 634 /* add current environment into the list */ 635 for (wrk = environ; *wrk != NULL; wrk++) { 636 (void) envlist_setenv(envlist, *wrk); 637 } 638 639 cpu_model = NULL; 640 641 qemu_add_opts(&qemu_trace_opts); 642 643 optind = 1; 644 for (;;) { 645 if (optind >= argc) { 646 break; 647 } 648 r = argv[optind]; 649 if (r[0] != '-') { 650 break; 651 } 652 optind++; 653 r++; 654 if (!strcmp(r, "-")) { 655 break; 656 } else if (!strcmp(r, "d")) { 657 if (optind >= argc) { 658 break; 659 } 660 log_mask = argv[optind++]; 661 } else if (!strcmp(r, "D")) { 662 if (optind >= argc) { 663 break; 664 } 665 log_file = argv[optind++]; 666 } else if (!strcmp(r, "E")) { 667 r = argv[optind++]; 668 if (envlist_setenv(envlist, r) != 0) { 669 usage(); 670 } 671 } else if (!strcmp(r, "ignore-environment")) { 672 envlist_free(envlist); 673 envlist = envlist_create(); 674 } else if (!strcmp(r, "U")) { 675 r = argv[optind++]; 676 if (envlist_unsetenv(envlist, r) != 0) { 677 usage(); 678 } 679 } else if (!strcmp(r, "s")) { 680 r = argv[optind++]; 681 rv = qemu_strtoul(r, &r, 0, &x86_stack_size); 682 if (rv < 0 || x86_stack_size <= 0) { 683 usage(); 684 } 685 if (*r == 'M') { 686 x86_stack_size *= MiB; 687 } else if (*r == 'k' || *r == 'K') { 688 x86_stack_size *= KiB; 689 } 690 } else if (!strcmp(r, "L")) { 691 interp_prefix = argv[optind++]; 692 } else if (!strcmp(r, "p")) { 693 qemu_host_page_size = atoi(argv[optind++]); 694 if (qemu_host_page_size == 0 || 695 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) { 696 fprintf(stderr, "page size must be a power of two\n"); 697 exit(1); 698 } 699 } else if (!strcmp(r, "g")) { 700 gdbstub = g_strdup(argv[optind++]); 701 } else if (!strcmp(r, "r")) { 702 qemu_uname_release = argv[optind++]; 703 } else if (!strcmp(r, "cpu")) { 704 cpu_model = argv[optind++]; 705 if (is_help_option(cpu_model)) { 706 /* XXX: implement xxx_cpu_list for targets that still miss it */ 707 #if defined(cpu_list) 708 cpu_list(); 709 #endif 710 exit(1); 711 } 712 } else if (!strcmp(r, "B")) { 713 rv = qemu_strtoul(argv[optind++], NULL, 0, &guest_base); 714 if (rv < 0) { 715 usage(); 716 } 717 have_guest_base = true; 718 } else if (!strcmp(r, "drop-ld-preload")) { 719 (void) envlist_unsetenv(envlist, "LD_PRELOAD"); 720 } else if (!strcmp(r, "bsd")) { 721 if (!strcasecmp(argv[optind], "freebsd")) { 722 bsd_type = target_freebsd; 723 } else if (!strcasecmp(argv[optind], "netbsd")) { 724 bsd_type = target_netbsd; 725 } else if (!strcasecmp(argv[optind], "openbsd")) { 726 bsd_type = target_openbsd; 727 } else { 728 usage(); 729 } 730 optind++; 731 } else if (!strcmp(r, "singlestep")) { 732 singlestep = 1; 733 } else if (!strcmp(r, "strace")) { 734 do_strace = 1; 735 } else if (!strcmp(r, "trace")) { 736 trace_opt_parse(optarg); 737 } else { 738 usage(); 739 } 740 } 741 742 /* init debug */ 743 qemu_log_needs_buffers(); 744 qemu_set_log_filename(log_file, &error_fatal); 745 if (log_mask) { 746 int mask; 747 748 mask = qemu_str_to_log_mask(log_mask); 749 if (!mask) { 750 qemu_print_log_usage(stdout); 751 exit(1); 752 } 753 qemu_set_log(mask); 754 } 755 756 if (optind >= argc) { 757 usage(); 758 } 759 filename = argv[optind]; 760 761 if (!trace_init_backends()) { 762 exit(1); 763 } 764 trace_init_file(); 765 766 /* Zero out regs */ 767 memset(regs, 0, sizeof(struct target_pt_regs)); 768 769 /* Zero out image_info */ 770 memset(info, 0, sizeof(struct image_info)); 771 772 /* Scan interp_prefix dir for replacement files. */ 773 init_paths(interp_prefix); 774 775 if (cpu_model == NULL) { 776 #if defined(TARGET_I386) 777 #ifdef TARGET_X86_64 778 cpu_model = "qemu64"; 779 #else 780 cpu_model = "qemu32"; 781 #endif 782 #elif defined(TARGET_SPARC) 783 #ifdef TARGET_SPARC64 784 cpu_model = "TI UltraSparc II"; 785 #else 786 cpu_model = "Fujitsu MB86904"; 787 #endif 788 #else 789 cpu_model = "any"; 790 #endif 791 } 792 793 cpu_type = parse_cpu_option(cpu_model); 794 /* init tcg before creating CPUs and to get qemu_host_page_size */ 795 { 796 AccelClass *ac = ACCEL_GET_CLASS(current_accel()); 797 798 accel_init_interfaces(ac); 799 ac->init_machine(NULL); 800 } 801 cpu = cpu_create(cpu_type); 802 env = cpu->env_ptr; 803 #if defined(TARGET_SPARC) || defined(TARGET_PPC) 804 cpu_reset(cpu); 805 #endif 806 thread_cpu = cpu; 807 808 if (getenv("QEMU_STRACE")) { 809 do_strace = 1; 810 } 811 812 target_environ = envlist_to_environ(envlist, NULL); 813 envlist_free(envlist); 814 815 /* 816 * Now that page sizes are configured in tcg_exec_init() we can do 817 * proper page alignment for guest_base. 818 */ 819 guest_base = HOST_PAGE_ALIGN(guest_base); 820 821 /* 822 * Read in mmap_min_addr kernel parameter. This value is used 823 * When loading the ELF image to determine whether guest_base 824 * is needed. 825 * 826 * When user has explicitly set the quest base, we skip this 827 * test. 828 */ 829 if (!have_guest_base) { 830 FILE *fp; 831 832 fp = fopen("/proc/sys/vm/mmap_min_addr", "r"); 833 if (fp != NULL) { 834 unsigned long tmp; 835 if (fscanf(fp, "%lu", &tmp) == 1) { 836 mmap_min_addr = tmp; 837 qemu_log_mask(CPU_LOG_PAGE, "host mmap_min_addr=0x%lx\n", 838 mmap_min_addr); 839 } 840 fclose(fp); 841 } 842 } 843 844 if (loader_exec(filename, argv + optind, target_environ, regs, info) != 0) { 845 printf("Error loading %s\n", filename); 846 _exit(1); 847 } 848 849 for (wrk = target_environ; *wrk; wrk++) { 850 g_free(*wrk); 851 } 852 853 g_free(target_environ); 854 855 if (qemu_loglevel_mask(CPU_LOG_PAGE)) { 856 qemu_log("guest_base %p\n", (void *)guest_base); 857 log_page_dump("binary load"); 858 859 qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk); 860 qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code); 861 qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n", 862 info->start_code); 863 qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n", 864 info->start_data); 865 qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data); 866 qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n", 867 info->start_stack); 868 qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk); 869 qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry); 870 } 871 872 target_set_brk(info->brk); 873 syscall_init(); 874 signal_init(); 875 876 /* 877 * Now that we've loaded the binary, GUEST_BASE is fixed. Delay 878 * generating the prologue until now so that the prologue can take 879 * the real value of GUEST_BASE into account. 880 */ 881 tcg_prologue_init(tcg_ctx); 882 tcg_region_init(); 883 884 /* build Task State */ 885 memset(ts, 0, sizeof(TaskState)); 886 init_task_state(ts); 887 ts->info = info; 888 cpu->opaque = ts; 889 890 #if defined(TARGET_I386) 891 env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK; 892 env->hflags |= HF_PE_MASK | HF_CPL_MASK; 893 if (env->features[FEAT_1_EDX] & CPUID_SSE) { 894 env->cr[4] |= CR4_OSFXSR_MASK; 895 env->hflags |= HF_OSFXSR_MASK; 896 } 897 #ifndef TARGET_ABI32 898 /* enable 64 bit mode if possible */ 899 if (!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM)) { 900 fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n"); 901 exit(1); 902 } 903 env->cr[4] |= CR4_PAE_MASK; 904 env->efer |= MSR_EFER_LMA | MSR_EFER_LME; 905 env->hflags |= HF_LMA_MASK; 906 #endif 907 908 /* flags setup : we activate the IRQs by default as in user mode */ 909 env->eflags |= IF_MASK; 910 911 /* linux register setup */ 912 #ifndef TARGET_ABI32 913 env->regs[R_EAX] = regs->rax; 914 env->regs[R_EBX] = regs->rbx; 915 env->regs[R_ECX] = regs->rcx; 916 env->regs[R_EDX] = regs->rdx; 917 env->regs[R_ESI] = regs->rsi; 918 env->regs[R_EDI] = regs->rdi; 919 env->regs[R_EBP] = regs->rbp; 920 env->regs[R_ESP] = regs->rsp; 921 env->eip = regs->rip; 922 #else 923 env->regs[R_EAX] = regs->eax; 924 env->regs[R_EBX] = regs->ebx; 925 env->regs[R_ECX] = regs->ecx; 926 env->regs[R_EDX] = regs->edx; 927 env->regs[R_ESI] = regs->esi; 928 env->regs[R_EDI] = regs->edi; 929 env->regs[R_EBP] = regs->ebp; 930 env->regs[R_ESP] = regs->esp; 931 env->eip = regs->eip; 932 #endif 933 934 /* linux interrupt setup */ 935 #ifndef TARGET_ABI32 936 env->idt.limit = 511; 937 #else 938 env->idt.limit = 255; 939 #endif 940 env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1), 941 PROT_READ | PROT_WRITE, 942 MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); 943 idt_table = g2h_untagged(env->idt.base); 944 set_idt(0, 0); 945 set_idt(1, 0); 946 set_idt(2, 0); 947 set_idt(3, 3); 948 set_idt(4, 3); 949 set_idt(5, 0); 950 set_idt(6, 0); 951 set_idt(7, 0); 952 set_idt(8, 0); 953 set_idt(9, 0); 954 set_idt(10, 0); 955 set_idt(11, 0); 956 set_idt(12, 0); 957 set_idt(13, 0); 958 set_idt(14, 0); 959 set_idt(15, 0); 960 set_idt(16, 0); 961 set_idt(17, 0); 962 set_idt(18, 0); 963 set_idt(19, 0); 964 set_idt(0x80, 3); 965 966 /* linux segment setup */ 967 { 968 uint64_t *gdt_table; 969 env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES, 970 PROT_READ | PROT_WRITE, 971 MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); 972 env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1; 973 gdt_table = g2h_untagged(env->gdt.base); 974 #ifdef TARGET_ABI32 975 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff, 976 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 977 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT)); 978 #else 979 /* 64 bit code segment */ 980 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff, 981 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 982 DESC_L_MASK | 983 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT)); 984 #endif 985 write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff, 986 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 987 (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT)); 988 } 989 990 cpu_x86_load_seg(env, R_CS, __USER_CS); 991 cpu_x86_load_seg(env, R_SS, __USER_DS); 992 #ifdef TARGET_ABI32 993 cpu_x86_load_seg(env, R_DS, __USER_DS); 994 cpu_x86_load_seg(env, R_ES, __USER_DS); 995 cpu_x86_load_seg(env, R_FS, __USER_DS); 996 cpu_x86_load_seg(env, R_GS, __USER_DS); 997 /* This hack makes Wine work... */ 998 env->segs[R_FS].selector = 0; 999 #else 1000 cpu_x86_load_seg(env, R_DS, 0); 1001 cpu_x86_load_seg(env, R_ES, 0); 1002 cpu_x86_load_seg(env, R_FS, 0); 1003 cpu_x86_load_seg(env, R_GS, 0); 1004 #endif 1005 #elif defined(TARGET_SPARC) 1006 { 1007 int i; 1008 env->pc = regs->pc; 1009 env->npc = regs->npc; 1010 env->y = regs->y; 1011 for (i = 0; i < 8; i++) { 1012 env->gregs[i] = regs->u_regs[i]; 1013 } 1014 for (i = 0; i < 8; i++) { 1015 env->regwptr[i] = regs->u_regs[i + 8]; 1016 } 1017 } 1018 #else 1019 #error unsupported target CPU 1020 #endif 1021 1022 if (gdbstub) { 1023 gdbserver_start(gdbstub); 1024 gdb_handlesig(cpu, 0); 1025 } 1026 cpu_loop(env); 1027 /* never exits */ 1028 return 0; 1029 } 1030