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 <sys/syscall.h>
26#include <sys/resource.h>
27
28#include "qapi/error.h"
29#include "qemu.h"
30#include "qemu/path.h"
31#include "qemu/queue.h"
32#include "qemu/config-file.h"
33#include "qemu/cutils.h"
34#include "qemu/error-report.h"
35#include "qemu/help_option.h"
36#include "qemu/module.h"
37#include "cpu.h"
38#include "exec/exec-all.h"
39#include "tcg.h"
40#include "qemu/timer.h"
41#include "qemu/envlist.h"
42#include "qemu/guest-random.h"
43#include "elf.h"
44#include "trace/control.h"
45#include "target_elf.h"
46#include "cpu_loop-common.h"
47#include "crypto/init.h"
48
49char *exec_path;
50
51int singlestep;
52static const char *filename;
53static const char *argv0;
54static int gdbstub_port;
55static envlist_t *envlist;
56static const char *cpu_model;
57static const char *cpu_type;
58static const char *seed_optarg;
59unsigned long mmap_min_addr;
60unsigned long guest_base;
61int have_guest_base;
62
63/*
64 * When running 32-on-64 we should make sure we can fit all of the possible
65 * guest address space into a contiguous chunk of virtual host memory.
66 *
67 * This way we will never overlap with our own libraries or binaries or stack
68 * or anything else that QEMU maps.
69 *
70 * Many cpus reserve the high bit (or more than one for some 64-bit cpus)
71 * of the address for the kernel. Some cpus rely on this and user space
72 * uses the high bit(s) for pointer tagging and the like. For them, we
73 * must preserve the expected address space.
74 */
75#ifndef MAX_RESERVED_VA
76# if HOST_LONG_BITS > TARGET_VIRT_ADDR_SPACE_BITS
77# if TARGET_VIRT_ADDR_SPACE_BITS == 32 && \
78 (TARGET_LONG_BITS == 32 || defined(TARGET_ABI32))
79/* There are a number of places where we assign reserved_va to a variable
80 of type abi_ulong and expect it to fit. Avoid the last page. */
81# define MAX_RESERVED_VA (0xfffffffful & TARGET_PAGE_MASK)
82# else
83# define MAX_RESERVED_VA (1ul << TARGET_VIRT_ADDR_SPACE_BITS)
84# endif
85# else
86# define MAX_RESERVED_VA 0
87# endif
88#endif
89
90unsigned long reserved_va;
91
92static void usage(int exitcode);
93
94static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX;
95const char *qemu_uname_release;
96
97/* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
98 we allocate a bigger stack. Need a better solution, for example
99 by remapping the process stack directly at the right place */
100unsigned long guest_stack_size = 8 * 1024 * 1024UL;
101
102void gemu_log(const char *fmt, ...)
103{
104 va_list ap;
105
106 va_start(ap, fmt);
107 vfprintf(stderr, fmt, ap);
108 va_end(ap);
109}
110
111#if defined(TARGET_I386)
112int cpu_get_pic_interrupt(CPUX86State *env)
113{
114 return -1;
115}
116#endif
117
118/***********************************************************/
119/* Helper routines for implementing atomic operations. */
120
121/* Make sure everything is in a consistent state for calling fork(). */
122void fork_start(void)
123{
124 start_exclusive();
125 mmap_fork_start();
126 cpu_list_lock();
127}
128
129void fork_end(int child)
130{
131 mmap_fork_end(child);
132 if (child) {
133 CPUState *cpu, *next_cpu;
134 /* Child processes created by fork() only have a single thread.
135 Discard information about the parent threads. */
136 CPU_FOREACH_SAFE(cpu, next_cpu) {
137 if (cpu != thread_cpu) {
138 QTAILQ_REMOVE_RCU(&cpus, cpu, node);
139 }
140 }
141 qemu_init_cpu_list();
142 gdbserver_fork(thread_cpu);
143 /* qemu_init_cpu_list() takes care of reinitializing the
144 * exclusive state, so we don't need to end_exclusive() here.
145 */
146 } else {
147 cpu_list_unlock();
148 end_exclusive();
149 }
150}
151
152__thread CPUState *thread_cpu;
153
154bool qemu_cpu_is_self(CPUState *cpu)
155{
156 return thread_cpu == cpu;
157}
158
159void qemu_cpu_kick(CPUState *cpu)
160{
161 cpu_exit(cpu);
162}
163
164void task_settid(TaskState *ts)
165{
166 if (ts->ts_tid == 0) {
167 ts->ts_tid = (pid_t)syscall(SYS_gettid);
168 }
169}
170
171void stop_all_tasks(void)
172{
173 /*
174 * We trust that when using NPTL, start_exclusive()
175 * handles thread stopping correctly.
176 */
177 start_exclusive();
178}
179
180/* Assumes contents are already zeroed. */
181void init_task_state(TaskState *ts)
182{
183 ts->used = 1;
184 ts->sigaltstack_used = (struct target_sigaltstack) {
185 .ss_sp = 0,
186 .ss_size = 0,
187 .ss_flags = TARGET_SS_DISABLE,
188 };
189}
190
191CPUArchState *cpu_copy(CPUArchState *env)
192{
193 CPUState *cpu = env_cpu(env);
194 CPUState *new_cpu = cpu_create(cpu_type);
195 CPUArchState *new_env = new_cpu->env_ptr;
196 CPUBreakpoint *bp;
197 CPUWatchpoint *wp;
198
199 /* Reset non arch specific state */
200 cpu_reset(new_cpu);
201
202 memcpy(new_env, env, sizeof(CPUArchState));
203
204 /* Clone all break/watchpoints.
205 Note: Once we support ptrace with hw-debug register access, make sure
206 BP_CPU break/watchpoints are handled correctly on clone. */
207 QTAILQ_INIT(&new_cpu->breakpoints);
208 QTAILQ_INIT(&new_cpu->watchpoints);
209 QTAILQ_FOREACH(bp, &cpu->breakpoints, entry) {
210 cpu_breakpoint_insert(new_cpu, bp->pc, bp->flags, NULL);
211 }
212 QTAILQ_FOREACH(wp, &cpu->watchpoints, entry) {
213 cpu_watchpoint_insert(new_cpu, wp->vaddr, wp->len, wp->flags, NULL);
214 }
215
216 return new_env;
217}
218
219static void handle_arg_help(const char *arg)
220{
221 usage(EXIT_SUCCESS);
222}
223
224static void handle_arg_log(const char *arg)
225{
226 int mask;
227
228 mask = qemu_str_to_log_mask(arg);
229 if (!mask) {
230 qemu_print_log_usage(stdout);
231 exit(EXIT_FAILURE);
232 }
233 qemu_log_needs_buffers();
234 qemu_set_log(mask);
235}
236
237static void handle_arg_dfilter(const char *arg)
238{
239 qemu_set_dfilter_ranges(arg, NULL);
240}
241
242static void handle_arg_log_filename(const char *arg)
243{
244 qemu_set_log_filename(arg, &error_fatal);
245}
246
247static void handle_arg_set_env(const char *arg)
248{
249 char *r, *p, *token;
250 r = p = strdup(arg);
251 while ((token = strsep(&p, ",")) != NULL) {
252 if (envlist_setenv(envlist, token) != 0) {
253 usage(EXIT_FAILURE);
254 }
255 }
256 free(r);
257}
258
259static void handle_arg_unset_env(const char *arg)
260{
261 char *r, *p, *token;
262 r = p = strdup(arg);
263 while ((token = strsep(&p, ",")) != NULL) {
264 if (envlist_unsetenv(envlist, token) != 0) {
265 usage(EXIT_FAILURE);
266 }
267 }
268 free(r);
269}
270
271static void handle_arg_argv0(const char *arg)
272{
273 argv0 = strdup(arg);
274}
275
276static void handle_arg_stack_size(const char *arg)
277{
278 char *p;
279 guest_stack_size = strtoul(arg, &p, 0);
280 if (guest_stack_size == 0) {
281 usage(EXIT_FAILURE);
282 }
283
284 if (*p == 'M') {
285 guest_stack_size *= MiB;
286 } else if (*p == 'k' || *p == 'K') {
287 guest_stack_size *= KiB;
288 }
289}
290
291static void handle_arg_ld_prefix(const char *arg)
292{
293 interp_prefix = strdup(arg);
294}
295
296static void handle_arg_pagesize(const char *arg)
297{
298 qemu_host_page_size = atoi(arg);
299 if (qemu_host_page_size == 0 ||
300 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
301 fprintf(stderr, "page size must be a power of two\n");
302 exit(EXIT_FAILURE);
303 }
304}
305
306static void handle_arg_seed(const char *arg)
307{
308 seed_optarg = arg;
309}
310
311static void handle_arg_gdb(const char *arg)
312{
313 gdbstub_port = atoi(arg);
314}
315
316static void handle_arg_uname(const char *arg)
317{
318 qemu_uname_release = strdup(arg);
319}
320
321static void handle_arg_cpu(const char *arg)
322{
323 cpu_model = strdup(arg);
324 if (cpu_model == NULL || is_help_option(cpu_model)) {
325 /* XXX: implement xxx_cpu_list for targets that still miss it */
326#if defined(cpu_list)
327 cpu_list();
328#endif
329 exit(EXIT_FAILURE);
330 }
331}
332
333static void handle_arg_guest_base(const char *arg)
334{
335 guest_base = strtol(arg, NULL, 0);
336 have_guest_base = 1;
337}
338
339static void handle_arg_reserved_va(const char *arg)
340{
341 char *p;
342 int shift = 0;
343 reserved_va = strtoul(arg, &p, 0);
344 switch (*p) {
345 case 'k':
346 case 'K':
347 shift = 10;
348 break;
349 case 'M':
350 shift = 20;
351 break;
352 case 'G':
353 shift = 30;
354 break;
355 }
356 if (shift) {
357 unsigned long unshifted = reserved_va;
358 p++;
359 reserved_va <<= shift;
360 if (reserved_va >> shift != unshifted
361 || (MAX_RESERVED_VA && reserved_va > MAX_RESERVED_VA)) {
362 fprintf(stderr, "Reserved virtual address too big\n");
363 exit(EXIT_FAILURE);
364 }
365 }
366 if (*p) {
367 fprintf(stderr, "Unrecognised -R size suffix '%s'\n", p);
368 exit(EXIT_FAILURE);
369 }
370}
371
372static void handle_arg_singlestep(const char *arg)
373{
374 singlestep = 1;
375}
376
377static void handle_arg_strace(const char *arg)
378{
379 do_strace = 1;
380}
381
382static void handle_arg_version(const char *arg)
383{
384 printf("qemu-" TARGET_NAME " version " QEMU_FULL_VERSION
385 "\n" QEMU_COPYRIGHT "\n");
386 exit(EXIT_SUCCESS);
387}
388
389static char *trace_file;
390static void handle_arg_trace(const char *arg)
391{
392 g_free(trace_file);
393 trace_file = trace_opt_parse(arg);
394}
395
396struct qemu_argument {
397 const char *argv;
398 const char *env;
399 bool has_arg;
400 void (*handle_opt)(const char *arg);
401 const char *example;
402 const char *help;
403};
404
405static const struct qemu_argument arg_table[] = {
406 {"h", "", false, handle_arg_help,
407 "", "print this help"},
408 {"help", "", false, handle_arg_help,
409 "", ""},
410 {"g", "QEMU_GDB", true, handle_arg_gdb,
411 "port", "wait gdb connection to 'port'"},
412 {"L", "QEMU_LD_PREFIX", true, handle_arg_ld_prefix,
413 "path", "set the elf interpreter prefix to 'path'"},
414 {"s", "QEMU_STACK_SIZE", true, handle_arg_stack_size,
415 "size", "set the stack size to 'size' bytes"},
416 {"cpu", "QEMU_CPU", true, handle_arg_cpu,
417 "model", "select CPU (-cpu help for list)"},
418 {"E", "QEMU_SET_ENV", true, handle_arg_set_env,
419 "var=value", "sets targets environment variable (see below)"},
420 {"U", "QEMU_UNSET_ENV", true, handle_arg_unset_env,
421 "var", "unsets targets environment variable (see below)"},
422 {"0", "QEMU_ARGV0", true, handle_arg_argv0,
423 "argv0", "forces target process argv[0] to be 'argv0'"},
424 {"r", "QEMU_UNAME", true, handle_arg_uname,
425 "uname", "set qemu uname release string to 'uname'"},
426 {"B", "QEMU_GUEST_BASE", true, handle_arg_guest_base,
427 "address", "set guest_base address to 'address'"},
428 {"R", "QEMU_RESERVED_VA", true, handle_arg_reserved_va,
429 "size", "reserve 'size' bytes for guest virtual address space"},
430 {"d", "QEMU_LOG", true, handle_arg_log,
431 "item[,...]", "enable logging of specified items "
432 "(use '-d help' for a list of items)"},
433 {"dfilter", "QEMU_DFILTER", true, handle_arg_dfilter,
434 "range[,...]","filter logging based on address range"},
435 {"D", "QEMU_LOG_FILENAME", true, handle_arg_log_filename,
436 "logfile", "write logs to 'logfile' (default stderr)"},
437 {"p", "QEMU_PAGESIZE", true, handle_arg_pagesize,
438 "pagesize", "set the host page size to 'pagesize'"},
439 {"singlestep", "QEMU_SINGLESTEP", false, handle_arg_singlestep,
440 "", "run in singlestep mode"},
441 {"strace", "QEMU_STRACE", false, handle_arg_strace,
442 "", "log system calls"},
443 {"seed", "QEMU_RAND_SEED", true, handle_arg_seed,
444 "", "Seed for pseudo-random number generator"},
445 {"trace", "QEMU_TRACE", true, handle_arg_trace,
446 "", "[[enable=]<pattern>][,events=<file>][,file=<file>]"},
447 {"version", "QEMU_VERSION", false, handle_arg_version,
448 "", "display version information and exit"},
449 {NULL, NULL, false, NULL, NULL, NULL}
450};
451
452static void usage(int exitcode)
453{
454 const struct qemu_argument *arginfo;
455 int maxarglen;
456 int maxenvlen;
457
458 printf("usage: qemu-" TARGET_NAME " [options] program [arguments...]\n"
459 "Linux CPU emulator (compiled for " TARGET_NAME " emulation)\n"
460 "\n"
461 "Options and associated environment variables:\n"
462 "\n");
463
464 /* Calculate column widths. We must always have at least enough space
465 * for the column header.
466 */
467 maxarglen = strlen("Argument");
468 maxenvlen = strlen("Env-variable");
469
470 for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) {
471 int arglen = strlen(arginfo->argv);
472 if (arginfo->has_arg) {
473 arglen += strlen(arginfo->example) + 1;
474 }
475 if (strlen(arginfo->env) > maxenvlen) {
476 maxenvlen = strlen(arginfo->env);
477 }
478 if (arglen > maxarglen) {
479 maxarglen = arglen;
480 }
481 }
482
483 printf("%-*s %-*s Description\n", maxarglen+1, "Argument",
484 maxenvlen, "Env-variable");
485
486 for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) {
487 if (arginfo->has_arg) {
488 printf("-%s %-*s %-*s %s\n", arginfo->argv,
489 (int)(maxarglen - strlen(arginfo->argv) - 1),
490 arginfo->example, maxenvlen, arginfo->env, arginfo->help);
491 } else {
492 printf("-%-*s %-*s %s\n", maxarglen, arginfo->argv,
493 maxenvlen, arginfo->env,
494 arginfo->help);
495 }
496 }
497
498 printf("\n"
499 "Defaults:\n"
500 "QEMU_LD_PREFIX = %s\n"
501 "QEMU_STACK_SIZE = %ld byte\n",
502 interp_prefix,
503 guest_stack_size);
504
505 printf("\n"
506 "You can use -E and -U options or the QEMU_SET_ENV and\n"
507 "QEMU_UNSET_ENV environment variables to set and unset\n"
508 "environment variables for the target process.\n"
509 "It is possible to provide several variables by separating them\n"
510 "by commas in getsubopt(3) style. Additionally it is possible to\n"
511 "provide the -E and -U options multiple times.\n"
512 "The following lines are equivalent:\n"
513 " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n"
514 " -E var1=val2,var2=val2 -U LD_PRELOAD,LD_DEBUG\n"
515 " QEMU_SET_ENV=var1=val2,var2=val2 QEMU_UNSET_ENV=LD_PRELOAD,LD_DEBUG\n"
516 "Note that if you provide several changes to a single variable\n"
517 "the last change will stay in effect.\n"
518 "\n"
519 QEMU_HELP_BOTTOM "\n");
520
521 exit(exitcode);
522}
523
524static int parse_args(int argc, char **argv)
525{
526 const char *r;
527 int optind;
528 const struct qemu_argument *arginfo;
529
530 for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) {
531 if (arginfo->env == NULL) {
532 continue;
533 }
534
535 r = getenv(arginfo->env);
536 if (r != NULL) {
537 arginfo->handle_opt(r);
538 }
539 }
540
541 optind = 1;
542 for (;;) {
543 if (optind >= argc) {
544 break;
545 }
546 r = argv[optind];
547 if (r[0] != '-') {
548 break;
549 }
550 optind++;
551 r++;
552 if (!strcmp(r, "-")) {
553 break;
554 }
555 /* Treat --foo the same as -foo. */
556 if (r[0] == '-') {
557 r++;
558 }
559
560 for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) {
561 if (!strcmp(r, arginfo->argv)) {
562 if (arginfo->has_arg) {
563 if (optind >= argc) {
564 (void) fprintf(stderr,
565 "qemu: missing argument for option '%s'\n", r);
566 exit(EXIT_FAILURE);
567 }
568 arginfo->handle_opt(argv[optind]);
569 optind++;
570 } else {
571 arginfo->handle_opt(NULL);
572 }
573 break;
574 }
575 }
576
577 /* no option matched the current argv */
578 if (arginfo->handle_opt == NULL) {
579 (void) fprintf(stderr, "qemu: unknown option '%s'\n", r);
580 exit(EXIT_FAILURE);
581 }
582 }
583
584 if (optind >= argc) {
585 (void) fprintf(stderr, "qemu: no user program specified\n");
586 exit(EXIT_FAILURE);
587 }
588
589 filename = argv[optind];
590 exec_path = argv[optind];
591
592 return optind;
593}
594
595int main(int argc, char **argv, char **envp)
596{
597 struct target_pt_regs regs1, *regs = &regs1;
598 struct image_info info1, *info = &info1;
599 struct linux_binprm bprm;
600 TaskState *ts;
601 CPUArchState *env;
602 CPUState *cpu;
603 int optind;
604 char **target_environ, **wrk;
605 char **target_argv;
606 int target_argc;
607 int i;
608 int ret;
609 int execfd;
610
611 error_init(argv[0]);
612 module_call_init(MODULE_INIT_TRACE);
613 qemu_init_cpu_list();
614 module_call_init(MODULE_INIT_QOM);
615
616 envlist = envlist_create();
617
618 /* add current environment into the list */
619 for (wrk = environ; *wrk != NULL; wrk++) {
620 (void) envlist_setenv(envlist, *wrk);
621 }
622
623 /* Read the stack limit from the kernel. If it's "unlimited",
624 then we can do little else besides use the default. */
625 {
626 struct rlimit lim;
627 if (getrlimit(RLIMIT_STACK, &lim) == 0
628 && lim.rlim_cur != RLIM_INFINITY
629 && lim.rlim_cur == (target_long)lim.rlim_cur) {
630 guest_stack_size = lim.rlim_cur;
631 }
632 }
633
634 cpu_model = 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_option(cpu_model);
671
672 /* init tcg before creating CPUs and to get qemu_host_page_size */
673 tcg_exec_init(0);
674
675 /* Reserving *too* much vm space via mmap can run into problems
676 with rlimits, oom due to page table creation, etc. We will still try it,
677 if directed by the command-line option, but not by default. */
678 if (HOST_LONG_BITS == 64 &&
679 TARGET_VIRT_ADDR_SPACE_BITS <= 32 &&
680 reserved_va == 0) {
681 /* reserved_va must be aligned with the host page size
682 * as it is used with mmap()
683 */
684 reserved_va = MAX_RESERVED_VA & qemu_host_page_mask;
685 }
686
687 cpu = cpu_create(cpu_type);
688 env = cpu->env_ptr;
689 cpu_reset(cpu);
690
691 thread_cpu = cpu;
692
693 if (getenv("QEMU_STRACE")) {
694 do_strace = 1;
695 }
696
697 if (seed_optarg == NULL) {
698 seed_optarg = getenv("QEMU_RAND_SEED");
699 }
700 {
701 Error *err = NULL;
702 if (seed_optarg != NULL) {
703 qemu_guest_random_seed_main(seed_optarg, &err);
704 } else {
705 qcrypto_init(&err);
706 }
707 if (err) {
708 error_reportf_err(err, "cannot initialize crypto: ");
709 exit(1);
710 }
711 }
712
713 target_environ = envlist_to_environ(envlist, NULL);
714 envlist_free(envlist);
715
716 /*
717 * Now that page sizes are configured in tcg_exec_init() we can do
718 * proper page alignment for guest_base.
719 */
720 guest_base = HOST_PAGE_ALIGN(guest_base);
721
722 if (reserved_va || have_guest_base) {
723 guest_base = init_guest_space(guest_base, reserved_va, 0,
724 have_guest_base);
725 if (guest_base == (unsigned long)-1) {
726 fprintf(stderr, "Unable to reserve 0x%lx bytes of virtual address "
727 "space for use as guest address space (check your virtual "
728 "memory ulimit setting or reserve less using -R option)\n",
729 reserved_va);
730 exit(EXIT_FAILURE);
731 }
732
733 if (reserved_va) {
734 mmap_next_start = reserved_va;
735 }
736 }
737
738 /*
739 * Read in mmap_min_addr kernel parameter. This value is used
740 * When loading the ELF image to determine whether guest_base
741 * is needed. It is also used in mmap_find_vma.
742 */
743 {
744 FILE *fp;
745
746 if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) {
747 unsigned long tmp;
748 if (fscanf(fp, "%lu", &tmp) == 1) {
749 mmap_min_addr = tmp;
750 qemu_log_mask(CPU_LOG_PAGE, "host mmap_min_addr=0x%lx\n", mmap_min_addr);
751 }
752 fclose(fp);
753 }
754 }
755
756 /*
757 * Prepare copy of argv vector for target.
758 */
759 target_argc = argc - optind;
760 target_argv = calloc(target_argc + 1, sizeof (char *));
761 if (target_argv == NULL) {
762 (void) fprintf(stderr, "Unable to allocate memory for target_argv\n");
763 exit(EXIT_FAILURE);
764 }
765
766 /*
767 * If argv0 is specified (using '-0' switch) we replace
768 * argv[0] pointer with the given one.
769 */
770 i = 0;
771 if (argv0 != NULL) {
772 target_argv[i++] = strdup(argv0);
773 }
774 for (; i < target_argc; i++) {
775 target_argv[i] = strdup(argv[optind + i]);
776 }
777 target_argv[target_argc] = NULL;
778
779 ts = g_new0(TaskState, 1);
780 init_task_state(ts);
781 /* build Task State */
782 ts->info = info;
783 ts->bprm = &bprm;
784 cpu->opaque = ts;
785 task_settid(ts);
786
787 ret = loader_exec(execfd, filename, target_argv, target_environ, regs,
788 info, &bprm);
789 if (ret != 0) {
790 printf("Error while loading %s: %s\n", filename, strerror(-ret));
791 _exit(EXIT_FAILURE);
792 }
793
794 for (wrk = target_environ; *wrk; wrk++) {
795 g_free(*wrk);
796 }
797
798 g_free(target_environ);
799
800 if (qemu_loglevel_mask(CPU_LOG_PAGE)) {
801 qemu_log("guest_base 0x%lx\n", guest_base);
802 log_page_dump();
803
804 qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk);
805 qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code);
806 qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n", info->start_code);
807 qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n", info->start_data);
808 qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data);
809 qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n", info->start_stack);
810 qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk);
811 qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry);
812 qemu_log("argv_start 0x" TARGET_ABI_FMT_lx "\n", info->arg_start);
813 qemu_log("env_start 0x" TARGET_ABI_FMT_lx "\n",
814 info->arg_end + (abi_ulong)sizeof(abi_ulong));
815 qemu_log("auxv_start 0x" TARGET_ABI_FMT_lx "\n", info->saved_auxv);
816 }
817
818 target_set_brk(info->brk);
819 syscall_init();
820 signal_init();
821
822 /* Now that we've loaded the binary, GUEST_BASE is fixed. Delay
823 generating the prologue until now so that the prologue can take
824 the real value of GUEST_BASE into account. */
825 tcg_prologue_init(tcg_ctx);
826 tcg_region_init();
827
828 target_cpu_copy_regs(env, regs);
829
830 if (gdbstub_port) {
831 if (gdbserver_start(gdbstub_port) < 0) {
832 fprintf(stderr, "qemu: could not open gdbserver on port %d\n",
833 gdbstub_port);
834 exit(EXIT_FAILURE);
835 }
836 gdb_handlesig(cpu, 0);
837 }
838 cpu_loop(env);
839 /* never exits */
840 return 0;
841}
842