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 "qemu/units.h" 21 #include "qemu-version.h" 22 #include <sys/syscall.h> 23 #include <sys/resource.h> 24 25 #include "qapi/error.h" 26 #include "qemu.h" 27 #include "qemu/path.h" 28 #include "qemu/config-file.h" 29 #include "qemu/cutils.h" 30 #include "qemu/help_option.h" 31 #include "cpu.h" 32 #include "exec/exec-all.h" 33 #include "tcg.h" 34 #include "qemu/timer.h" 35 #include "qemu/envlist.h" 36 #include "elf.h" 37 #include "trace/control.h" 38 #include "target_elf.h" 39 #include "cpu_loop-common.h" 40 41 char *exec_path; 42 43 int singlestep; 44 static const char *filename; 45 static const char *argv0; 46 static int gdbstub_port; 47 static envlist_t *envlist; 48 static const char *cpu_model; 49 static const char *cpu_type; 50 unsigned long mmap_min_addr; 51 unsigned long guest_base; 52 int have_guest_base; 53 54 /* 55 * When running 32-on-64 we should make sure we can fit all of the possible 56 * guest address space into a contiguous chunk of virtual host memory. 57 * 58 * This way we will never overlap with our own libraries or binaries or stack 59 * or anything else that QEMU maps. 60 * 61 * Many cpus reserve the high bit (or more than one for some 64-bit cpus) 62 * of the address for the kernel. Some cpus rely on this and user space 63 * uses the high bit(s) for pointer tagging and the like. For them, we 64 * must preserve the expected address space. 65 */ 66 #ifndef MAX_RESERVED_VA 67 # if HOST_LONG_BITS > TARGET_VIRT_ADDR_SPACE_BITS 68 # if TARGET_VIRT_ADDR_SPACE_BITS == 32 && \ 69 (TARGET_LONG_BITS == 32 || defined(TARGET_ABI32)) 70 /* There are a number of places where we assign reserved_va to a variable 71 of type abi_ulong and expect it to fit. Avoid the last page. */ 72 # define MAX_RESERVED_VA (0xfffffffful & TARGET_PAGE_MASK) 73 # else 74 # define MAX_RESERVED_VA (1ul << TARGET_VIRT_ADDR_SPACE_BITS) 75 # endif 76 # else 77 # define MAX_RESERVED_VA 0 78 # endif 79 #endif 80 81 /* That said, reserving *too* much vm space via mmap can run into problems 82 with rlimits, oom due to page table creation, etc. We will still try it, 83 if directed by the command-line option, but not by default. */ 84 #if HOST_LONG_BITS == 64 && TARGET_VIRT_ADDR_SPACE_BITS <= 32 85 unsigned long reserved_va = MAX_RESERVED_VA; 86 #else 87 unsigned long reserved_va; 88 #endif 89 90 static void usage(int exitcode); 91 92 static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX; 93 const char *qemu_uname_release; 94 95 /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so 96 we allocate a bigger stack. Need a better solution, for example 97 by remapping the process stack directly at the right place */ 98 unsigned long guest_stack_size = 8 * 1024 * 1024UL; 99 100 void gemu_log(const char *fmt, ...) 101 { 102 va_list ap; 103 104 va_start(ap, fmt); 105 vfprintf(stderr, fmt, ap); 106 va_end(ap); 107 } 108 109 #if defined(TARGET_I386) 110 int cpu_get_pic_interrupt(CPUX86State *env) 111 { 112 return -1; 113 } 114 #endif 115 116 /***********************************************************/ 117 /* Helper routines for implementing atomic operations. */ 118 119 /* Make sure everything is in a consistent state for calling fork(). */ 120 void fork_start(void) 121 { 122 start_exclusive(); 123 mmap_fork_start(); 124 cpu_list_lock(); 125 } 126 127 void fork_end(int child) 128 { 129 mmap_fork_end(child); 130 if (child) { 131 CPUState *cpu, *next_cpu; 132 /* Child processes created by fork() only have a single thread. 133 Discard information about the parent threads. */ 134 CPU_FOREACH_SAFE(cpu, next_cpu) { 135 if (cpu != thread_cpu) { 136 QTAILQ_REMOVE(&cpus, cpu, node); 137 } 138 } 139 qemu_init_cpu_list(); 140 gdbserver_fork(thread_cpu); 141 /* qemu_init_cpu_list() takes care of reinitializing the 142 * exclusive state, so we don't need to end_exclusive() here. 143 */ 144 } else { 145 cpu_list_unlock(); 146 end_exclusive(); 147 } 148 } 149 150 __thread CPUState *thread_cpu; 151 152 bool qemu_cpu_is_self(CPUState *cpu) 153 { 154 return thread_cpu == cpu; 155 } 156 157 void qemu_cpu_kick(CPUState *cpu) 158 { 159 cpu_exit(cpu); 160 } 161 162 void task_settid(TaskState *ts) 163 { 164 if (ts->ts_tid == 0) { 165 ts->ts_tid = (pid_t)syscall(SYS_gettid); 166 } 167 } 168 169 void stop_all_tasks(void) 170 { 171 /* 172 * We trust that when using NPTL, start_exclusive() 173 * handles thread stopping correctly. 174 */ 175 start_exclusive(); 176 } 177 178 /* Assumes contents are already zeroed. */ 179 void init_task_state(TaskState *ts) 180 { 181 ts->used = 1; 182 } 183 184 CPUArchState *cpu_copy(CPUArchState *env) 185 { 186 CPUState *cpu = ENV_GET_CPU(env); 187 CPUState *new_cpu = cpu_create(cpu_type); 188 CPUArchState *new_env = new_cpu->env_ptr; 189 CPUBreakpoint *bp; 190 CPUWatchpoint *wp; 191 192 /* Reset non arch specific state */ 193 cpu_reset(new_cpu); 194 195 memcpy(new_env, env, sizeof(CPUArchState)); 196 197 /* Clone all break/watchpoints. 198 Note: Once we support ptrace with hw-debug register access, make sure 199 BP_CPU break/watchpoints are handled correctly on clone. */ 200 QTAILQ_INIT(&new_cpu->breakpoints); 201 QTAILQ_INIT(&new_cpu->watchpoints); 202 QTAILQ_FOREACH(bp, &cpu->breakpoints, entry) { 203 cpu_breakpoint_insert(new_cpu, bp->pc, bp->flags, NULL); 204 } 205 QTAILQ_FOREACH(wp, &cpu->watchpoints, entry) { 206 cpu_watchpoint_insert(new_cpu, wp->vaddr, wp->len, wp->flags, NULL); 207 } 208 209 return new_env; 210 } 211 212 static void handle_arg_help(const char *arg) 213 { 214 usage(EXIT_SUCCESS); 215 } 216 217 static void handle_arg_log(const char *arg) 218 { 219 int mask; 220 221 mask = qemu_str_to_log_mask(arg); 222 if (!mask) { 223 qemu_print_log_usage(stdout); 224 exit(EXIT_FAILURE); 225 } 226 qemu_log_needs_buffers(); 227 qemu_set_log(mask); 228 } 229 230 static void handle_arg_dfilter(const char *arg) 231 { 232 qemu_set_dfilter_ranges(arg, NULL); 233 } 234 235 static void handle_arg_log_filename(const char *arg) 236 { 237 qemu_set_log_filename(arg, &error_fatal); 238 } 239 240 static void handle_arg_set_env(const char *arg) 241 { 242 char *r, *p, *token; 243 r = p = strdup(arg); 244 while ((token = strsep(&p, ",")) != NULL) { 245 if (envlist_setenv(envlist, token) != 0) { 246 usage(EXIT_FAILURE); 247 } 248 } 249 free(r); 250 } 251 252 static void handle_arg_unset_env(const char *arg) 253 { 254 char *r, *p, *token; 255 r = p = strdup(arg); 256 while ((token = strsep(&p, ",")) != NULL) { 257 if (envlist_unsetenv(envlist, token) != 0) { 258 usage(EXIT_FAILURE); 259 } 260 } 261 free(r); 262 } 263 264 static void handle_arg_argv0(const char *arg) 265 { 266 argv0 = strdup(arg); 267 } 268 269 static void handle_arg_stack_size(const char *arg) 270 { 271 char *p; 272 guest_stack_size = strtoul(arg, &p, 0); 273 if (guest_stack_size == 0) { 274 usage(EXIT_FAILURE); 275 } 276 277 if (*p == 'M') { 278 guest_stack_size *= MiB; 279 } else if (*p == 'k' || *p == 'K') { 280 guest_stack_size *= KiB; 281 } 282 } 283 284 static void handle_arg_ld_prefix(const char *arg) 285 { 286 interp_prefix = strdup(arg); 287 } 288 289 static void handle_arg_pagesize(const char *arg) 290 { 291 qemu_host_page_size = atoi(arg); 292 if (qemu_host_page_size == 0 || 293 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) { 294 fprintf(stderr, "page size must be a power of two\n"); 295 exit(EXIT_FAILURE); 296 } 297 } 298 299 static void handle_arg_randseed(const char *arg) 300 { 301 unsigned long long seed; 302 303 if (parse_uint_full(arg, &seed, 0) != 0 || seed > UINT_MAX) { 304 fprintf(stderr, "Invalid seed number: %s\n", arg); 305 exit(EXIT_FAILURE); 306 } 307 srand(seed); 308 } 309 310 static void handle_arg_gdb(const char *arg) 311 { 312 gdbstub_port = atoi(arg); 313 } 314 315 static void handle_arg_uname(const char *arg) 316 { 317 qemu_uname_release = strdup(arg); 318 } 319 320 static void handle_arg_cpu(const char *arg) 321 { 322 cpu_model = strdup(arg); 323 if (cpu_model == NULL || is_help_option(cpu_model)) { 324 /* XXX: implement xxx_cpu_list for targets that still miss it */ 325 #if defined(cpu_list) 326 cpu_list(stdout, &fprintf); 327 #endif 328 exit(EXIT_FAILURE); 329 } 330 } 331 332 static void handle_arg_guest_base(const char *arg) 333 { 334 guest_base = strtol(arg, NULL, 0); 335 have_guest_base = 1; 336 } 337 338 static void handle_arg_reserved_va(const char *arg) 339 { 340 char *p; 341 int shift = 0; 342 reserved_va = strtoul(arg, &p, 0); 343 switch (*p) { 344 case 'k': 345 case 'K': 346 shift = 10; 347 break; 348 case 'M': 349 shift = 20; 350 break; 351 case 'G': 352 shift = 30; 353 break; 354 } 355 if (shift) { 356 unsigned long unshifted = reserved_va; 357 p++; 358 reserved_va <<= shift; 359 if (reserved_va >> shift != unshifted 360 || (MAX_RESERVED_VA && reserved_va > MAX_RESERVED_VA)) { 361 fprintf(stderr, "Reserved virtual address too big\n"); 362 exit(EXIT_FAILURE); 363 } 364 } 365 if (*p) { 366 fprintf(stderr, "Unrecognised -R size suffix '%s'\n", p); 367 exit(EXIT_FAILURE); 368 } 369 } 370 371 static void handle_arg_singlestep(const char *arg) 372 { 373 singlestep = 1; 374 } 375 376 static void handle_arg_strace(const char *arg) 377 { 378 do_strace = 1; 379 } 380 381 static void handle_arg_version(const char *arg) 382 { 383 printf("qemu-" TARGET_NAME " version " QEMU_FULL_VERSION 384 "\n" QEMU_COPYRIGHT "\n"); 385 exit(EXIT_SUCCESS); 386 } 387 388 static char *trace_file; 389 static void handle_arg_trace(const char *arg) 390 { 391 g_free(trace_file); 392 trace_file = trace_opt_parse(arg); 393 } 394 395 struct qemu_argument { 396 const char *argv; 397 const char *env; 398 bool has_arg; 399 void (*handle_opt)(const char *arg); 400 const char *example; 401 const char *help; 402 }; 403 404 static const struct qemu_argument arg_table[] = { 405 {"h", "", false, handle_arg_help, 406 "", "print this help"}, 407 {"help", "", false, handle_arg_help, 408 "", ""}, 409 {"g", "QEMU_GDB", true, handle_arg_gdb, 410 "port", "wait gdb connection to 'port'"}, 411 {"L", "QEMU_LD_PREFIX", true, handle_arg_ld_prefix, 412 "path", "set the elf interpreter prefix to 'path'"}, 413 {"s", "QEMU_STACK_SIZE", true, handle_arg_stack_size, 414 "size", "set the stack size to 'size' bytes"}, 415 {"cpu", "QEMU_CPU", true, handle_arg_cpu, 416 "model", "select CPU (-cpu help for list)"}, 417 {"E", "QEMU_SET_ENV", true, handle_arg_set_env, 418 "var=value", "sets targets environment variable (see below)"}, 419 {"U", "QEMU_UNSET_ENV", true, handle_arg_unset_env, 420 "var", "unsets targets environment variable (see below)"}, 421 {"0", "QEMU_ARGV0", true, handle_arg_argv0, 422 "argv0", "forces target process argv[0] to be 'argv0'"}, 423 {"r", "QEMU_UNAME", true, handle_arg_uname, 424 "uname", "set qemu uname release string to 'uname'"}, 425 {"B", "QEMU_GUEST_BASE", true, handle_arg_guest_base, 426 "address", "set guest_base address to 'address'"}, 427 {"R", "QEMU_RESERVED_VA", true, handle_arg_reserved_va, 428 "size", "reserve 'size' bytes for guest virtual address space"}, 429 {"d", "QEMU_LOG", true, handle_arg_log, 430 "item[,...]", "enable logging of specified items " 431 "(use '-d help' for a list of items)"}, 432 {"dfilter", "QEMU_DFILTER", true, handle_arg_dfilter, 433 "range[,...]","filter logging based on address range"}, 434 {"D", "QEMU_LOG_FILENAME", true, handle_arg_log_filename, 435 "logfile", "write logs to 'logfile' (default stderr)"}, 436 {"p", "QEMU_PAGESIZE", true, handle_arg_pagesize, 437 "pagesize", "set the host page size to 'pagesize'"}, 438 {"singlestep", "QEMU_SINGLESTEP", false, handle_arg_singlestep, 439 "", "run in singlestep mode"}, 440 {"strace", "QEMU_STRACE", false, handle_arg_strace, 441 "", "log system calls"}, 442 {"seed", "QEMU_RAND_SEED", true, handle_arg_randseed, 443 "", "Seed for pseudo-random number generator"}, 444 {"trace", "QEMU_TRACE", true, handle_arg_trace, 445 "", "[[enable=]<pattern>][,events=<file>][,file=<file>]"}, 446 {"version", "QEMU_VERSION", false, handle_arg_version, 447 "", "display version information and exit"}, 448 {NULL, NULL, false, NULL, NULL, NULL} 449 }; 450 451 static void usage(int exitcode) 452 { 453 const struct qemu_argument *arginfo; 454 int maxarglen; 455 int maxenvlen; 456 457 printf("usage: qemu-" TARGET_NAME " [options] program [arguments...]\n" 458 "Linux CPU emulator (compiled for " TARGET_NAME " emulation)\n" 459 "\n" 460 "Options and associated environment variables:\n" 461 "\n"); 462 463 /* Calculate column widths. We must always have at least enough space 464 * for the column header. 465 */ 466 maxarglen = strlen("Argument"); 467 maxenvlen = strlen("Env-variable"); 468 469 for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) { 470 int arglen = strlen(arginfo->argv); 471 if (arginfo->has_arg) { 472 arglen += strlen(arginfo->example) + 1; 473 } 474 if (strlen(arginfo->env) > maxenvlen) { 475 maxenvlen = strlen(arginfo->env); 476 } 477 if (arglen > maxarglen) { 478 maxarglen = arglen; 479 } 480 } 481 482 printf("%-*s %-*s Description\n", maxarglen+1, "Argument", 483 maxenvlen, "Env-variable"); 484 485 for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) { 486 if (arginfo->has_arg) { 487 printf("-%s %-*s %-*s %s\n", arginfo->argv, 488 (int)(maxarglen - strlen(arginfo->argv) - 1), 489 arginfo->example, maxenvlen, arginfo->env, arginfo->help); 490 } else { 491 printf("-%-*s %-*s %s\n", maxarglen, arginfo->argv, 492 maxenvlen, arginfo->env, 493 arginfo->help); 494 } 495 } 496 497 printf("\n" 498 "Defaults:\n" 499 "QEMU_LD_PREFIX = %s\n" 500 "QEMU_STACK_SIZE = %ld byte\n", 501 interp_prefix, 502 guest_stack_size); 503 504 printf("\n" 505 "You can use -E and -U options or the QEMU_SET_ENV and\n" 506 "QEMU_UNSET_ENV environment variables to set and unset\n" 507 "environment variables for the target process.\n" 508 "It is possible to provide several variables by separating them\n" 509 "by commas in getsubopt(3) style. Additionally it is possible to\n" 510 "provide the -E and -U options multiple times.\n" 511 "The following lines are equivalent:\n" 512 " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n" 513 " -E var1=val2,var2=val2 -U LD_PRELOAD,LD_DEBUG\n" 514 " QEMU_SET_ENV=var1=val2,var2=val2 QEMU_UNSET_ENV=LD_PRELOAD,LD_DEBUG\n" 515 "Note that if you provide several changes to a single variable\n" 516 "the last change will stay in effect.\n" 517 "\n" 518 QEMU_HELP_BOTTOM "\n"); 519 520 exit(exitcode); 521 } 522 523 static int parse_args(int argc, char **argv) 524 { 525 const char *r; 526 int optind; 527 const struct qemu_argument *arginfo; 528 529 for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) { 530 if (arginfo->env == NULL) { 531 continue; 532 } 533 534 r = getenv(arginfo->env); 535 if (r != NULL) { 536 arginfo->handle_opt(r); 537 } 538 } 539 540 optind = 1; 541 for (;;) { 542 if (optind >= argc) { 543 break; 544 } 545 r = argv[optind]; 546 if (r[0] != '-') { 547 break; 548 } 549 optind++; 550 r++; 551 if (!strcmp(r, "-")) { 552 break; 553 } 554 /* Treat --foo the same as -foo. */ 555 if (r[0] == '-') { 556 r++; 557 } 558 559 for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) { 560 if (!strcmp(r, arginfo->argv)) { 561 if (arginfo->has_arg) { 562 if (optind >= argc) { 563 (void) fprintf(stderr, 564 "qemu: missing argument for option '%s'\n", r); 565 exit(EXIT_FAILURE); 566 } 567 arginfo->handle_opt(argv[optind]); 568 optind++; 569 } else { 570 arginfo->handle_opt(NULL); 571 } 572 break; 573 } 574 } 575 576 /* no option matched the current argv */ 577 if (arginfo->handle_opt == NULL) { 578 (void) fprintf(stderr, "qemu: unknown option '%s'\n", r); 579 exit(EXIT_FAILURE); 580 } 581 } 582 583 if (optind >= argc) { 584 (void) fprintf(stderr, "qemu: no user program specified\n"); 585 exit(EXIT_FAILURE); 586 } 587 588 filename = argv[optind]; 589 exec_path = argv[optind]; 590 591 return optind; 592 } 593 594 int main(int argc, char **argv, char **envp) 595 { 596 struct target_pt_regs regs1, *regs = ®s1; 597 struct image_info info1, *info = &info1; 598 struct linux_binprm bprm; 599 TaskState *ts; 600 CPUArchState *env; 601 CPUState *cpu; 602 int optind; 603 char **target_environ, **wrk; 604 char **target_argv; 605 int target_argc; 606 int i; 607 int ret; 608 int execfd; 609 610 module_call_init(MODULE_INIT_TRACE); 611 qemu_init_cpu_list(); 612 module_call_init(MODULE_INIT_QOM); 613 614 envlist = envlist_create(); 615 616 /* add current environment into the list */ 617 for (wrk = environ; *wrk != NULL; wrk++) { 618 (void) envlist_setenv(envlist, *wrk); 619 } 620 621 /* Read the stack limit from the kernel. If it's "unlimited", 622 then we can do little else besides use the default. */ 623 { 624 struct rlimit lim; 625 if (getrlimit(RLIMIT_STACK, &lim) == 0 626 && lim.rlim_cur != RLIM_INFINITY 627 && lim.rlim_cur == (target_long)lim.rlim_cur) { 628 guest_stack_size = lim.rlim_cur; 629 } 630 } 631 632 cpu_model = NULL; 633 634 srand(time(NULL)); 635 636 qemu_add_opts(&qemu_trace_opts); 637 638 optind = parse_args(argc, argv); 639 640 if (!trace_init_backends()) { 641 exit(1); 642 } 643 trace_init_file(trace_file); 644 645 /* Zero out regs */ 646 memset(regs, 0, sizeof(struct target_pt_regs)); 647 648 /* Zero out image_info */ 649 memset(info, 0, sizeof(struct image_info)); 650 651 memset(&bprm, 0, sizeof (bprm)); 652 653 /* Scan interp_prefix dir for replacement files. */ 654 init_paths(interp_prefix); 655 656 init_qemu_uname_release(); 657 658 execfd = qemu_getauxval(AT_EXECFD); 659 if (execfd == 0) { 660 execfd = open(filename, O_RDONLY); 661 if (execfd < 0) { 662 printf("Error while loading %s: %s\n", filename, strerror(errno)); 663 _exit(EXIT_FAILURE); 664 } 665 } 666 667 if (cpu_model == NULL) { 668 cpu_model = cpu_get_model(get_elf_eflags(execfd)); 669 } 670 cpu_type = parse_cpu_model(cpu_model); 671 672 /* init tcg before creating CPUs and to get qemu_host_page_size */ 673 tcg_exec_init(0); 674 675 cpu = cpu_create(cpu_type); 676 env = cpu->env_ptr; 677 cpu_reset(cpu); 678 679 thread_cpu = cpu; 680 681 if (getenv("QEMU_STRACE")) { 682 do_strace = 1; 683 } 684 685 if (getenv("QEMU_RAND_SEED")) { 686 handle_arg_randseed(getenv("QEMU_RAND_SEED")); 687 } 688 689 target_environ = envlist_to_environ(envlist, NULL); 690 envlist_free(envlist); 691 692 /* 693 * Now that page sizes are configured in tcg_exec_init() we can do 694 * proper page alignment for guest_base. 695 */ 696 guest_base = HOST_PAGE_ALIGN(guest_base); 697 698 if (reserved_va || have_guest_base) { 699 guest_base = init_guest_space(guest_base, reserved_va, 0, 700 have_guest_base); 701 if (guest_base == (unsigned long)-1) { 702 fprintf(stderr, "Unable to reserve 0x%lx bytes of virtual address " 703 "space for use as guest address space (check your virtual " 704 "memory ulimit setting or reserve less using -R option)\n", 705 reserved_va); 706 exit(EXIT_FAILURE); 707 } 708 709 if (reserved_va) { 710 mmap_next_start = reserved_va; 711 } 712 } 713 714 /* 715 * Read in mmap_min_addr kernel parameter. This value is used 716 * When loading the ELF image to determine whether guest_base 717 * is needed. It is also used in mmap_find_vma. 718 */ 719 { 720 FILE *fp; 721 722 if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) { 723 unsigned long tmp; 724 if (fscanf(fp, "%lu", &tmp) == 1) { 725 mmap_min_addr = tmp; 726 qemu_log_mask(CPU_LOG_PAGE, "host mmap_min_addr=0x%lx\n", mmap_min_addr); 727 } 728 fclose(fp); 729 } 730 } 731 732 /* 733 * Prepare copy of argv vector for target. 734 */ 735 target_argc = argc - optind; 736 target_argv = calloc(target_argc + 1, sizeof (char *)); 737 if (target_argv == NULL) { 738 (void) fprintf(stderr, "Unable to allocate memory for target_argv\n"); 739 exit(EXIT_FAILURE); 740 } 741 742 /* 743 * If argv0 is specified (using '-0' switch) we replace 744 * argv[0] pointer with the given one. 745 */ 746 i = 0; 747 if (argv0 != NULL) { 748 target_argv[i++] = strdup(argv0); 749 } 750 for (; i < target_argc; i++) { 751 target_argv[i] = strdup(argv[optind + i]); 752 } 753 target_argv[target_argc] = NULL; 754 755 ts = g_new0(TaskState, 1); 756 init_task_state(ts); 757 /* build Task State */ 758 ts->info = info; 759 ts->bprm = &bprm; 760 cpu->opaque = ts; 761 task_settid(ts); 762 763 ret = loader_exec(execfd, filename, target_argv, target_environ, regs, 764 info, &bprm); 765 if (ret != 0) { 766 printf("Error while loading %s: %s\n", filename, strerror(-ret)); 767 _exit(EXIT_FAILURE); 768 } 769 770 for (wrk = target_environ; *wrk; wrk++) { 771 g_free(*wrk); 772 } 773 774 g_free(target_environ); 775 776 if (qemu_loglevel_mask(CPU_LOG_PAGE)) { 777 qemu_log("guest_base 0x%lx\n", guest_base); 778 log_page_dump(); 779 780 qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk); 781 qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code); 782 qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n", info->start_code); 783 qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n", info->start_data); 784 qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data); 785 qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n", info->start_stack); 786 qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk); 787 qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry); 788 qemu_log("argv_start 0x" TARGET_ABI_FMT_lx "\n", info->arg_start); 789 qemu_log("env_start 0x" TARGET_ABI_FMT_lx "\n", 790 info->arg_end + (abi_ulong)sizeof(abi_ulong)); 791 qemu_log("auxv_start 0x" TARGET_ABI_FMT_lx "\n", info->saved_auxv); 792 } 793 794 target_set_brk(info->brk); 795 syscall_init(); 796 signal_init(); 797 798 /* Now that we've loaded the binary, GUEST_BASE is fixed. Delay 799 generating the prologue until now so that the prologue can take 800 the real value of GUEST_BASE into account. */ 801 tcg_prologue_init(tcg_ctx); 802 tcg_region_init(); 803 804 target_cpu_copy_regs(env, regs); 805 806 if (gdbstub_port) { 807 if (gdbserver_start(gdbstub_port) < 0) { 808 fprintf(stderr, "qemu: could not open gdbserver on port %d\n", 809 gdbstub_port); 810 exit(EXIT_FAILURE); 811 } 812 gdb_handlesig(cpu, 0); 813 } 814 cpu_loop(env); 815 /* never exits */ 816 return 0; 817 } 818