4 * Copyright (c) 2003-2008 Fabrice Bellard
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.
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.
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/>.
20 #include "qemu/osdep.h"
21 #include "qemu/help-texts.h"
22 #include "qemu/units.h"
23 #include "qemu/accel.h"
24 #include "qemu-version.h"
25 #include <sys/syscall.h>
26 #include <sys/resource.h>
28 #include <linux/binfmts.h>
30 #include "qapi/error.h"
32 #include "user-internals.h"
33 #include "qemu/path.h"
34 #include "qemu/queue.h"
35 #include "qemu/config-file.h"
36 #include "qemu/cutils.h"
37 #include "qemu/error-report.h"
38 #include "qemu/help_option.h"
39 #include "qemu/module.h"
40 #include "qemu/plugin.h"
41 #include "exec/exec-all.h"
42 #include "exec/gdbstub.h"
43 #include "gdbstub/user.h"
45 #include "qemu/timer.h"
46 #include "qemu/envlist.h"
47 #include "qemu/guest-random.h"
49 #include "trace/control.h"
50 #include "target_elf.h"
51 #include "cpu_loop-common.h"
52 #include "crypto/init.h"
54 #include "signal-common.h"
56 #include "user-mmap.h"
57 #include "accel/tcg/perf.h"
59 #ifdef CONFIG_SEMIHOSTING
60 #include "semihosting/semihost.h"
63 #ifndef AT_FLAGS_PRESERVE_ARGV0
64 #define AT_FLAGS_PRESERVE_ARGV0_BIT 0
65 #define AT_FLAGS_PRESERVE_ARGV0 (1 << AT_FLAGS_PRESERVE_ARGV0_BIT)
69 char real_exec_path
[PATH_MAX
];
71 static bool opt_one_insn_per_tb
;
72 static const char *argv0
;
73 static const char *gdbstub
;
74 static envlist_t
*envlist
;
75 static const char *cpu_model
;
76 static const char *cpu_type
;
77 static const char *seed_optarg
;
78 unsigned long mmap_min_addr
;
83 * Used to implement backwards-compatibility for the `-strace`, and
84 * QEMU_STRACE options. Without this, the QEMU_LOG can be overwritten by
85 * -strace, or vice versa.
87 static bool enable_strace
;
90 * The last log mask given by the user in an environment variable or argument.
91 * Used to support command line arguments overriding environment variables.
93 static int last_log_mask
;
94 static const char *last_log_filename
;
97 * When running 32-on-64 we should make sure we can fit all of the possible
98 * guest address space into a contiguous chunk of virtual host memory.
100 * This way we will never overlap with our own libraries or binaries or stack
101 * or anything else that QEMU maps.
103 * Many cpus reserve the high bit (or more than one for some 64-bit cpus)
104 * of the address for the kernel. Some cpus rely on this and user space
105 * uses the high bit(s) for pointer tagging and the like. For them, we
106 * must preserve the expected address space.
108 #ifndef MAX_RESERVED_VA
109 # if HOST_LONG_BITS > TARGET_VIRT_ADDR_SPACE_BITS
110 # if TARGET_VIRT_ADDR_SPACE_BITS == 32 && \
111 (TARGET_LONG_BITS == 32 || defined(TARGET_ABI32))
112 # define MAX_RESERVED_VA(CPU) 0xfffffffful
114 # define MAX_RESERVED_VA(CPU) ((1ul << TARGET_VIRT_ADDR_SPACE_BITS) - 1)
117 # define MAX_RESERVED_VA(CPU) 0
121 unsigned long reserved_va
;
123 static void usage(int exitcode
);
125 static const char *interp_prefix
= CONFIG_QEMU_INTERP_PREFIX
;
126 const char *qemu_uname_release
;
128 #if !defined(TARGET_DEFAULT_STACK_SIZE)
129 /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
130 we allocate a bigger stack. Need a better solution, for example
131 by remapping the process stack directly at the right place */
132 #define TARGET_DEFAULT_STACK_SIZE 8 * 1024 * 1024UL
135 unsigned long guest_stack_size
= TARGET_DEFAULT_STACK_SIZE
;
137 /***********************************************************/
138 /* Helper routines for implementing atomic operations. */
140 /* Make sure everything is in a consistent state for calling fork(). */
141 void fork_start(void)
146 qemu_plugin_user_prefork_lock();
149 void fork_end(int child
)
151 qemu_plugin_user_postfork(child
);
152 mmap_fork_end(child
);
154 CPUState
*cpu
, *next_cpu
;
155 /* Child processes created by fork() only have a single thread.
156 Discard information about the parent threads. */
157 CPU_FOREACH_SAFE(cpu
, next_cpu
) {
158 if (cpu
!= thread_cpu
) {
159 QTAILQ_REMOVE_RCU(&cpus
, cpu
, node
);
162 qemu_init_cpu_list();
163 gdbserver_fork(thread_cpu
);
168 * qemu_init_cpu_list() reinitialized the child exclusive state, but we
169 * also need to keep current_cpu consistent, so call end_exclusive() for
170 * both child and parent.
175 __thread CPUState
*thread_cpu
;
177 bool qemu_cpu_is_self(CPUState
*cpu
)
179 return thread_cpu
== cpu
;
182 void qemu_cpu_kick(CPUState
*cpu
)
187 void task_settid(TaskState
*ts
)
189 if (ts
->ts_tid
== 0) {
190 ts
->ts_tid
= (pid_t
)syscall(SYS_gettid
);
194 void stop_all_tasks(void)
197 * We trust that when using NPTL, start_exclusive()
198 * handles thread stopping correctly.
203 /* Assumes contents are already zeroed. */
204 void init_task_state(TaskState
*ts
)
210 ts
->sigaltstack_used
= (struct target_sigaltstack
) {
213 .ss_flags
= TARGET_SS_DISABLE
,
216 /* Capture task start time relative to system boot */
218 ticks_per_sec
= sysconf(_SC_CLK_TCK
);
220 if ((ticks_per_sec
> 0) && !clock_gettime(CLOCK_BOOTTIME
, &bt
)) {
221 /* start_boottime is expressed in clock ticks */
222 ts
->start_boottime
= bt
.tv_sec
* (uint64_t) ticks_per_sec
;
223 ts
->start_boottime
+= bt
.tv_nsec
* (uint64_t) ticks_per_sec
/
224 NANOSECONDS_PER_SECOND
;
228 CPUArchState
*cpu_copy(CPUArchState
*env
)
230 CPUState
*cpu
= env_cpu(env
);
231 CPUState
*new_cpu
= cpu_create(cpu_type
);
232 CPUArchState
*new_env
= new_cpu
->env_ptr
;
235 /* Reset non arch specific state */
238 new_cpu
->tcg_cflags
= cpu
->tcg_cflags
;
239 memcpy(new_env
, env
, sizeof(CPUArchState
));
240 #if defined(TARGET_I386) || defined(TARGET_X86_64)
241 new_env
->gdt
.base
= target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES
,
242 PROT_READ
| PROT_WRITE
,
243 MAP_ANONYMOUS
| MAP_PRIVATE
, -1, 0);
244 memcpy(g2h_untagged(new_env
->gdt
.base
), g2h_untagged(env
->gdt
.base
),
245 sizeof(uint64_t) * TARGET_GDT_ENTRIES
);
246 OBJECT(new_cpu
)->free
= OBJECT(cpu
)->free
;
249 /* Clone all break/watchpoints.
250 Note: Once we support ptrace with hw-debug register access, make sure
251 BP_CPU break/watchpoints are handled correctly on clone. */
252 QTAILQ_INIT(&new_cpu
->breakpoints
);
253 QTAILQ_FOREACH(bp
, &cpu
->breakpoints
, entry
) {
254 cpu_breakpoint_insert(new_cpu
, bp
->pc
, bp
->flags
, NULL
);
260 static void handle_arg_help(const char *arg
)
265 static void handle_arg_log(const char *arg
)
267 last_log_mask
= qemu_str_to_log_mask(arg
);
268 if (!last_log_mask
) {
269 qemu_print_log_usage(stdout
);
274 static void handle_arg_dfilter(const char *arg
)
276 qemu_set_dfilter_ranges(arg
, &error_fatal
);
279 static void handle_arg_log_filename(const char *arg
)
281 last_log_filename
= arg
;
284 static void handle_arg_set_env(const char *arg
)
288 while ((token
= strsep(&p
, ",")) != NULL
) {
289 if (envlist_setenv(envlist
, token
) != 0) {
296 static void handle_arg_unset_env(const char *arg
)
300 while ((token
= strsep(&p
, ",")) != NULL
) {
301 if (envlist_unsetenv(envlist
, token
) != 0) {
308 static void handle_arg_argv0(const char *arg
)
313 static void handle_arg_stack_size(const char *arg
)
316 guest_stack_size
= strtoul(arg
, &p
, 0);
317 if (guest_stack_size
== 0) {
322 guest_stack_size
*= MiB
;
323 } else if (*p
== 'k' || *p
== 'K') {
324 guest_stack_size
*= KiB
;
328 static void handle_arg_ld_prefix(const char *arg
)
330 interp_prefix
= strdup(arg
);
333 static void handle_arg_pagesize(const char *arg
)
335 qemu_host_page_size
= atoi(arg
);
336 if (qemu_host_page_size
== 0 ||
337 (qemu_host_page_size
& (qemu_host_page_size
- 1)) != 0) {
338 fprintf(stderr
, "page size must be a power of two\n");
343 static void handle_arg_seed(const char *arg
)
348 static void handle_arg_gdb(const char *arg
)
350 gdbstub
= g_strdup(arg
);
353 static void handle_arg_uname(const char *arg
)
355 qemu_uname_release
= strdup(arg
);
358 static void handle_arg_cpu(const char *arg
)
360 cpu_model
= strdup(arg
);
361 if (cpu_model
== NULL
|| is_help_option(cpu_model
)) {
362 /* XXX: implement xxx_cpu_list for targets that still miss it */
363 #if defined(cpu_list)
370 static void handle_arg_guest_base(const char *arg
)
372 guest_base
= strtol(arg
, NULL
, 0);
373 have_guest_base
= true;
376 static void handle_arg_reserved_va(const char *arg
)
382 val
= strtoul(arg
, &p
, 0);
396 unsigned long unshifted
= val
;
399 if (val
>> shift
!= unshifted
) {
400 fprintf(stderr
, "Reserved virtual address too big\n");
405 fprintf(stderr
, "Unrecognised -R size suffix '%s'\n", p
);
408 /* The representation is size - 1, with 0 remaining "default". */
409 reserved_va
= val
? val
- 1 : 0;
412 static void handle_arg_one_insn_per_tb(const char *arg
)
414 opt_one_insn_per_tb
= true;
417 static void handle_arg_strace(const char *arg
)
419 enable_strace
= true;
422 static void handle_arg_version(const char *arg
)
424 printf("qemu-" TARGET_NAME
" version " QEMU_FULL_VERSION
425 "\n" QEMU_COPYRIGHT
"\n");
429 static void handle_arg_trace(const char *arg
)
431 trace_opt_parse(arg
);
434 #if defined(TARGET_XTENSA)
435 static void handle_arg_abi_call0(const char *arg
)
437 xtensa_set_abi_call0();
441 static void handle_arg_perfmap(const char *arg
)
443 perf_enable_perfmap();
446 static void handle_arg_jitdump(const char *arg
)
448 perf_enable_jitdump();
451 static QemuPluginList plugins
= QTAILQ_HEAD_INITIALIZER(plugins
);
454 static void handle_arg_plugin(const char *arg
)
456 qemu_plugin_opt_parse(arg
, &plugins
);
460 struct qemu_argument
{
464 void (*handle_opt
)(const char *arg
);
469 static const struct qemu_argument arg_table
[] = {
470 {"h", "", false, handle_arg_help
,
471 "", "print this help"},
472 {"help", "", false, handle_arg_help
,
474 {"g", "QEMU_GDB", true, handle_arg_gdb
,
475 "port", "wait gdb connection to 'port'"},
476 {"L", "QEMU_LD_PREFIX", true, handle_arg_ld_prefix
,
477 "path", "set the elf interpreter prefix to 'path'"},
478 {"s", "QEMU_STACK_SIZE", true, handle_arg_stack_size
,
479 "size", "set the stack size to 'size' bytes"},
480 {"cpu", "QEMU_CPU", true, handle_arg_cpu
,
481 "model", "select CPU (-cpu help for list)"},
482 {"E", "QEMU_SET_ENV", true, handle_arg_set_env
,
483 "var=value", "sets targets environment variable (see below)"},
484 {"U", "QEMU_UNSET_ENV", true, handle_arg_unset_env
,
485 "var", "unsets targets environment variable (see below)"},
486 {"0", "QEMU_ARGV0", true, handle_arg_argv0
,
487 "argv0", "forces target process argv[0] to be 'argv0'"},
488 {"r", "QEMU_UNAME", true, handle_arg_uname
,
489 "uname", "set qemu uname release string to 'uname'"},
490 {"B", "QEMU_GUEST_BASE", true, handle_arg_guest_base
,
491 "address", "set guest_base address to 'address'"},
492 {"R", "QEMU_RESERVED_VA", true, handle_arg_reserved_va
,
493 "size", "reserve 'size' bytes for guest virtual address space"},
494 {"d", "QEMU_LOG", true, handle_arg_log
,
495 "item[,...]", "enable logging of specified items "
496 "(use '-d help' for a list of items)"},
497 {"dfilter", "QEMU_DFILTER", true, handle_arg_dfilter
,
498 "range[,...]","filter logging based on address range"},
499 {"D", "QEMU_LOG_FILENAME", true, handle_arg_log_filename
,
500 "logfile", "write logs to 'logfile' (default stderr)"},
501 {"p", "QEMU_PAGESIZE", true, handle_arg_pagesize
,
502 "pagesize", "set the host page size to 'pagesize'"},
504 "QEMU_ONE_INSN_PER_TB", false, handle_arg_one_insn_per_tb
,
505 "", "run with one guest instruction per emulated TB"},
506 {"singlestep", "QEMU_SINGLESTEP", false, handle_arg_one_insn_per_tb
,
507 "", "deprecated synonym for -one-insn-per-tb"},
508 {"strace", "QEMU_STRACE", false, handle_arg_strace
,
509 "", "log system calls"},
510 {"seed", "QEMU_RAND_SEED", true, handle_arg_seed
,
511 "", "Seed for pseudo-random number generator"},
512 {"trace", "QEMU_TRACE", true, handle_arg_trace
,
513 "", "[[enable=]<pattern>][,events=<file>][,file=<file>]"},
515 {"plugin", "QEMU_PLUGIN", true, handle_arg_plugin
,
516 "", "[file=]<file>[,<argname>=<argvalue>]"},
518 {"version", "QEMU_VERSION", false, handle_arg_version
,
519 "", "display version information and exit"},
520 #if defined(TARGET_XTENSA)
521 {"xtensa-abi-call0", "QEMU_XTENSA_ABI_CALL0", false, handle_arg_abi_call0
,
522 "", "assume CALL0 Xtensa ABI"},
524 {"perfmap", "QEMU_PERFMAP", false, handle_arg_perfmap
,
525 "", "Generate a /tmp/perf-${pid}.map file for perf"},
526 {"jitdump", "QEMU_JITDUMP", false, handle_arg_jitdump
,
527 "", "Generate a jit-${pid}.dump file for perf"},
528 {NULL
, NULL
, false, NULL
, NULL
, NULL
}
531 static void usage(int exitcode
)
533 const struct qemu_argument
*arginfo
;
537 printf("usage: qemu-" TARGET_NAME
" [options] program [arguments...]\n"
538 "Linux CPU emulator (compiled for " TARGET_NAME
" emulation)\n"
540 "Options and associated environment variables:\n"
543 /* Calculate column widths. We must always have at least enough space
544 * for the column header.
546 maxarglen
= strlen("Argument");
547 maxenvlen
= strlen("Env-variable");
549 for (arginfo
= arg_table
; arginfo
->handle_opt
!= NULL
; arginfo
++) {
550 int arglen
= strlen(arginfo
->argv
);
551 if (arginfo
->has_arg
) {
552 arglen
+= strlen(arginfo
->example
) + 1;
554 if (strlen(arginfo
->env
) > maxenvlen
) {
555 maxenvlen
= strlen(arginfo
->env
);
557 if (arglen
> maxarglen
) {
562 printf("%-*s %-*s Description\n", maxarglen
+1, "Argument",
563 maxenvlen
, "Env-variable");
565 for (arginfo
= arg_table
; arginfo
->handle_opt
!= NULL
; arginfo
++) {
566 if (arginfo
->has_arg
) {
567 printf("-%s %-*s %-*s %s\n", arginfo
->argv
,
568 (int)(maxarglen
- strlen(arginfo
->argv
) - 1),
569 arginfo
->example
, maxenvlen
, arginfo
->env
, arginfo
->help
);
571 printf("-%-*s %-*s %s\n", maxarglen
, arginfo
->argv
,
572 maxenvlen
, arginfo
->env
,
579 "QEMU_LD_PREFIX = %s\n"
580 "QEMU_STACK_SIZE = %ld byte\n",
585 "You can use -E and -U options or the QEMU_SET_ENV and\n"
586 "QEMU_UNSET_ENV environment variables to set and unset\n"
587 "environment variables for the target process.\n"
588 "It is possible to provide several variables by separating them\n"
589 "by commas in getsubopt(3) style. Additionally it is possible to\n"
590 "provide the -E and -U options multiple times.\n"
591 "The following lines are equivalent:\n"
592 " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n"
593 " -E var1=val2,var2=val2 -U LD_PRELOAD,LD_DEBUG\n"
594 " QEMU_SET_ENV=var1=val2,var2=val2 QEMU_UNSET_ENV=LD_PRELOAD,LD_DEBUG\n"
595 "Note that if you provide several changes to a single variable\n"
596 "the last change will stay in effect.\n"
598 QEMU_HELP_BOTTOM
"\n");
603 static int parse_args(int argc
, char **argv
)
607 const struct qemu_argument
*arginfo
;
609 for (arginfo
= arg_table
; arginfo
->handle_opt
!= NULL
; arginfo
++) {
610 if (arginfo
->env
== NULL
) {
614 r
= getenv(arginfo
->env
);
616 arginfo
->handle_opt(r
);
622 if (optind
>= argc
) {
631 if (!strcmp(r
, "-")) {
634 /* Treat --foo the same as -foo. */
639 for (arginfo
= arg_table
; arginfo
->handle_opt
!= NULL
; arginfo
++) {
640 if (!strcmp(r
, arginfo
->argv
)) {
641 if (arginfo
->has_arg
) {
642 if (optind
>= argc
) {
643 (void) fprintf(stderr
,
644 "qemu: missing argument for option '%s'\n", r
);
647 arginfo
->handle_opt(argv
[optind
]);
650 arginfo
->handle_opt(NULL
);
656 /* no option matched the current argv */
657 if (arginfo
->handle_opt
== NULL
) {
658 (void) fprintf(stderr
, "qemu: unknown option '%s'\n", r
);
663 if (optind
>= argc
) {
664 (void) fprintf(stderr
, "qemu: no user program specified\n");
668 exec_path
= argv
[optind
];
673 int main(int argc
, char **argv
, char **envp
)
675 struct target_pt_regs regs1
, *regs
= ®s1
;
676 struct image_info info1
, *info
= &info1
;
677 struct linux_binprm bprm
;
682 char **target_environ
, **wrk
;
688 unsigned long max_reserved_va
;
692 module_call_init(MODULE_INIT_TRACE
);
693 qemu_init_cpu_list();
694 module_call_init(MODULE_INIT_QOM
);
696 envlist
= envlist_create();
698 /* add current environment into the list */
699 for (wrk
= environ
; *wrk
!= NULL
; wrk
++) {
700 (void) envlist_setenv(envlist
, *wrk
);
703 /* Read the stack limit from the kernel. If it's "unlimited",
704 then we can do little else besides use the default. */
707 if (getrlimit(RLIMIT_STACK
, &lim
) == 0
708 && lim
.rlim_cur
!= RLIM_INFINITY
709 && lim
.rlim_cur
== (target_long
)lim
.rlim_cur
710 && lim
.rlim_cur
> guest_stack_size
) {
711 guest_stack_size
= lim
.rlim_cur
;
717 qemu_add_opts(&qemu_trace_opts
);
718 qemu_plugin_add_opts();
720 optind
= parse_args(argc
, argv
);
722 qemu_set_log_filename_flags(last_log_filename
,
723 last_log_mask
| (enable_strace
* LOG_STRACE
),
726 if (!trace_init_backends()) {
730 qemu_plugin_load_list(&plugins
, &error_fatal
);
733 memset(regs
, 0, sizeof(struct target_pt_regs
));
735 /* Zero out image_info */
736 memset(info
, 0, sizeof(struct image_info
));
738 memset(&bprm
, 0, sizeof (bprm
));
740 /* Scan interp_prefix dir for replacement files. */
741 init_paths(interp_prefix
);
743 init_qemu_uname_release();
746 * Manage binfmt-misc open-binary flag
748 execfd
= qemu_getauxval(AT_EXECFD
);
750 execfd
= open(exec_path
, O_RDONLY
);
752 printf("Error while loading %s: %s\n", exec_path
, strerror(errno
));
757 /* Resolve executable file name to full path name */
758 if (realpath(exec_path
, real_exec_path
)) {
759 exec_path
= real_exec_path
;
763 * get binfmt_misc flags
765 preserve_argv0
= !!(qemu_getauxval(AT_FLAGS
) & AT_FLAGS_PRESERVE_ARGV0
);
768 * Manage binfmt-misc preserve-arg[0] flag
769 * argv[optind] full path to the binary
770 * argv[optind + 1] original argv[0]
772 if (optind
+ 1 < argc
&& preserve_argv0
) {
776 if (cpu_model
== NULL
) {
777 cpu_model
= cpu_get_model(get_elf_eflags(execfd
));
779 cpu_type
= parse_cpu_option(cpu_model
);
781 /* init tcg before creating CPUs and to get qemu_host_page_size */
783 AccelState
*accel
= current_accel();
784 AccelClass
*ac
= ACCEL_GET_CLASS(accel
);
786 accel_init_interfaces(ac
);
787 object_property_set_bool(OBJECT(accel
), "one-insn-per-tb",
788 opt_one_insn_per_tb
, &error_abort
);
789 ac
->init_machine(NULL
);
791 cpu
= cpu_create(cpu_type
);
797 * Reserving too much vm space via mmap can run into problems
798 * with rlimits, oom due to page table creation, etc. We will
799 * still try it, if directed by the command-line option, but
802 max_reserved_va
= MAX_RESERVED_VA(cpu
);
803 if (reserved_va
!= 0) {
804 if ((reserved_va
+ 1) % qemu_host_page_size
) {
805 char *s
= size_to_str(qemu_host_page_size
);
806 fprintf(stderr
, "Reserved virtual address not aligned mod %s\n", s
);
810 if (max_reserved_va
&& reserved_va
> max_reserved_va
) {
811 fprintf(stderr
, "Reserved virtual address too big\n");
814 } else if (HOST_LONG_BITS
== 64 && TARGET_VIRT_ADDR_SPACE_BITS
<= 32) {
815 /* MAX_RESERVED_VA + 1 is a large power of 2, so is aligned. */
816 reserved_va
= max_reserved_va
;
821 if (seed_optarg
!= NULL
) {
822 qemu_guest_random_seed_main(seed_optarg
, &err
);
827 error_reportf_err(err
, "cannot initialize crypto: ");
832 target_environ
= envlist_to_environ(envlist
, NULL
);
833 envlist_free(envlist
);
836 * Read in mmap_min_addr kernel parameter. This value is used
837 * When loading the ELF image to determine whether guest_base
838 * is needed. It is also used in mmap_find_vma.
843 if ((fp
= fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL
) {
845 if (fscanf(fp
, "%lu", &tmp
) == 1 && tmp
!= 0) {
847 qemu_log_mask(CPU_LOG_PAGE
, "host mmap_min_addr=0x%lx\n",
855 * We prefer to not make NULL pointers accessible to QEMU.
856 * If we're in a chroot with no /proc, fall back to 1 page.
858 if (mmap_min_addr
== 0) {
859 mmap_min_addr
= qemu_host_page_size
;
860 qemu_log_mask(CPU_LOG_PAGE
,
861 "host mmap_min_addr=0x%lx (fallback)\n",
866 * Prepare copy of argv vector for target.
868 target_argc
= argc
- optind
;
869 target_argv
= calloc(target_argc
+ 1, sizeof (char *));
870 if (target_argv
== NULL
) {
871 (void) fprintf(stderr
, "Unable to allocate memory for target_argv\n");
876 * If argv0 is specified (using '-0' switch) we replace
877 * argv[0] pointer with the given one.
881 target_argv
[i
++] = strdup(argv0
);
883 for (; i
< target_argc
; i
++) {
884 target_argv
[i
] = strdup(argv
[optind
+ i
]);
886 target_argv
[target_argc
] = NULL
;
888 ts
= g_new0(TaskState
, 1);
890 /* build Task State */
898 ret
= loader_exec(execfd
, exec_path
, target_argv
, target_environ
, regs
,
901 printf("Error while loading %s: %s\n", exec_path
, strerror(-ret
));
905 for (wrk
= target_environ
; *wrk
; wrk
++) {
909 g_free(target_environ
);
911 if (qemu_loglevel_mask(CPU_LOG_PAGE
)) {
912 FILE *f
= qemu_log_trylock();
914 fprintf(f
, "guest_base %p\n", (void *)guest_base
);
915 fprintf(f
, "page layout changed following binary load\n");
918 fprintf(f
, "start_brk 0x" TARGET_ABI_FMT_lx
"\n",
920 fprintf(f
, "end_code 0x" TARGET_ABI_FMT_lx
"\n",
922 fprintf(f
, "start_code 0x" TARGET_ABI_FMT_lx
"\n",
924 fprintf(f
, "start_data 0x" TARGET_ABI_FMT_lx
"\n",
926 fprintf(f
, "end_data 0x" TARGET_ABI_FMT_lx
"\n",
928 fprintf(f
, "start_stack 0x" TARGET_ABI_FMT_lx
"\n",
930 fprintf(f
, "brk 0x" TARGET_ABI_FMT_lx
"\n",
932 fprintf(f
, "entry 0x" TARGET_ABI_FMT_lx
"\n",
934 fprintf(f
, "argv_start 0x" TARGET_ABI_FMT_lx
"\n",
936 fprintf(f
, "env_start 0x" TARGET_ABI_FMT_lx
"\n",
938 fprintf(f
, "auxv_start 0x" TARGET_ABI_FMT_lx
"\n",
944 target_set_brk(info
->brk
);
948 /* Now that we've loaded the binary, GUEST_BASE is fixed. Delay
949 generating the prologue until now so that the prologue can take
950 the real value of GUEST_BASE into account. */
951 tcg_prologue_init(tcg_ctx
);
953 target_cpu_copy_regs(env
, regs
);
956 if (gdbserver_start(gdbstub
) < 0) {
957 fprintf(stderr
, "qemu: could not open gdbserver on %s\n",
961 gdb_handlesig(cpu
, 0);
964 #ifdef CONFIG_SEMIHOSTING
965 qemu_semihosting_guestfd_init();