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Commit | Line | Data |
---|---|---|
31e31b8a | 1 | /* |
93ac68bc | 2 | * qemu user main |
5fafdf24 | 3 | * |
68d0f70e | 4 | * Copyright (c) 2003-2008 Fabrice Bellard |
31e31b8a FB |
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 | |
8167ee88 | 17 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
31e31b8a | 18 | */ |
14a48c1d | 19 | |
d39594e9 | 20 | #include "qemu/osdep.h" |
a8d25326 | 21 | #include "qemu-common.h" |
b52713c1 | 22 | #include "qemu/units.h" |
14a48c1d | 23 | #include "sysemu/tcg.h" |
67a1de0d | 24 | #include "qemu-version.h" |
edf8e2af | 25 | #include <sys/syscall.h> |
703e0e89 | 26 | #include <sys/resource.h> |
ee947430 | 27 | #include <sys/shm.h> |
31e31b8a | 28 | |
daa76aa4 | 29 | #include "qapi/error.h" |
3ef693a0 | 30 | #include "qemu.h" |
f348b6d1 | 31 | #include "qemu/path.h" |
dc5e9ac7 | 32 | #include "qemu/queue.h" |
6533dd6e | 33 | #include "qemu/config-file.h" |
f348b6d1 | 34 | #include "qemu/cutils.h" |
f5852efa | 35 | #include "qemu/error-report.h" |
f348b6d1 | 36 | #include "qemu/help_option.h" |
0b8fa32f | 37 | #include "qemu/module.h" |
f308f64e | 38 | #include "qemu/plugin.h" |
2b41f10e | 39 | #include "cpu.h" |
63c91552 | 40 | #include "exec/exec-all.h" |
dcb32f1d | 41 | #include "tcg/tcg.h" |
1de7afc9 PB |
42 | #include "qemu/timer.h" |
43 | #include "qemu/envlist.h" | |
5ebdd774 | 44 | #include "qemu/guest-random.h" |
d8fd2954 | 45 | #include "elf.h" |
6533dd6e | 46 | #include "trace/control.h" |
542ca434 | 47 | #include "target_elf.h" |
cd71c089 | 48 | #include "cpu_loop-common.h" |
a573e9ba | 49 | #include "crypto/init.h" |
04a6dfeb | 50 | |
d088d664 AJ |
51 | char *exec_path; |
52 | ||
1b530a6d | 53 | int singlestep; |
8cb76755 | 54 | static const char *argv0; |
fcedd920 | 55 | static const char *gdbstub; |
8cb76755 | 56 | static envlist_t *envlist; |
51fb256a | 57 | static const char *cpu_model; |
2278b939 | 58 | static const char *cpu_type; |
5ebdd774 | 59 | static const char *seed_optarg; |
379f6698 PB |
60 | unsigned long mmap_min_addr; |
61 | unsigned long guest_base; | |
e307c192 | 62 | bool have_guest_base; |
120a9848 | 63 | |
4b25a506 JK |
64 | /* |
65 | * Used to implement backwards-compatibility for the `-strace`, and | |
66 | * QEMU_STRACE options. Without this, the QEMU_LOG can be overwritten by | |
67 | * -strace, or vice versa. | |
68 | */ | |
69 | static bool enable_strace; | |
70 | ||
71 | /* | |
72 | * The last log mask given by the user in an environment variable or argument. | |
73 | * Used to support command line arguments overriding environment variables. | |
74 | */ | |
75 | static int last_log_mask; | |
76 | ||
288e65b9 AG |
77 | /* |
78 | * When running 32-on-64 we should make sure we can fit all of the possible | |
79 | * guest address space into a contiguous chunk of virtual host memory. | |
80 | * | |
81 | * This way we will never overlap with our own libraries or binaries or stack | |
82 | * or anything else that QEMU maps. | |
18e80c55 RH |
83 | * |
84 | * Many cpus reserve the high bit (or more than one for some 64-bit cpus) | |
85 | * of the address for the kernel. Some cpus rely on this and user space | |
86 | * uses the high bit(s) for pointer tagging and the like. For them, we | |
87 | * must preserve the expected address space. | |
288e65b9 | 88 | */ |
18e80c55 RH |
89 | #ifndef MAX_RESERVED_VA |
90 | # if HOST_LONG_BITS > TARGET_VIRT_ADDR_SPACE_BITS | |
91 | # if TARGET_VIRT_ADDR_SPACE_BITS == 32 && \ | |
92 | (TARGET_LONG_BITS == 32 || defined(TARGET_ABI32)) | |
93 | /* There are a number of places where we assign reserved_va to a variable | |
94 | of type abi_ulong and expect it to fit. Avoid the last page. */ | |
8f67b9c6 | 95 | # define MAX_RESERVED_VA(CPU) (0xfffffffful & TARGET_PAGE_MASK) |
18e80c55 | 96 | # else |
8f67b9c6 | 97 | # define MAX_RESERVED_VA(CPU) (1ul << TARGET_VIRT_ADDR_SPACE_BITS) |
18e80c55 | 98 | # endif |
314992b1 | 99 | # else |
8f67b9c6 | 100 | # define MAX_RESERVED_VA(CPU) 0 |
314992b1 | 101 | # endif |
18e80c55 RH |
102 | #endif |
103 | ||
68a1c816 | 104 | unsigned long reserved_va; |
1b530a6d | 105 | |
d03f9c32 | 106 | static void usage(int exitcode); |
fc9c5412 | 107 | |
7ee2822c | 108 | static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX; |
e586822a | 109 | const char *qemu_uname_release; |
586314f2 | 110 | |
9de5e440 FB |
111 | /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so |
112 | we allocate a bigger stack. Need a better solution, for example | |
113 | by remapping the process stack directly at the right place */ | |
703e0e89 | 114 | unsigned long guest_stack_size = 8 * 1024 * 1024UL; |
31e31b8a | 115 | |
8fcd3692 | 116 | #if defined(TARGET_I386) |
05390248 | 117 | int cpu_get_pic_interrupt(CPUX86State *env) |
92ccca6a FB |
118 | { |
119 | return -1; | |
120 | } | |
8fcd3692 | 121 | #endif |
92ccca6a | 122 | |
d5975363 PB |
123 | /***********************************************************/ |
124 | /* Helper routines for implementing atomic operations. */ | |
125 | ||
d5975363 PB |
126 | /* Make sure everything is in a consistent state for calling fork(). */ |
127 | void fork_start(void) | |
128 | { | |
06065c45 | 129 | start_exclusive(); |
d032d1b4 | 130 | mmap_fork_start(); |
024949ca | 131 | cpu_list_lock(); |
d5975363 PB |
132 | } |
133 | ||
134 | void fork_end(int child) | |
135 | { | |
d032d1b4 | 136 | mmap_fork_end(child); |
d5975363 | 137 | if (child) { |
bdc44640 | 138 | CPUState *cpu, *next_cpu; |
d5975363 PB |
139 | /* Child processes created by fork() only have a single thread. |
140 | Discard information about the parent threads. */ | |
bdc44640 AF |
141 | CPU_FOREACH_SAFE(cpu, next_cpu) { |
142 | if (cpu != thread_cpu) { | |
068a5ea0 | 143 | QTAILQ_REMOVE_RCU(&cpus, cpu, node); |
bdc44640 AF |
144 | } |
145 | } | |
267f685b | 146 | qemu_init_cpu_list(); |
f7ec7f7b | 147 | gdbserver_fork(thread_cpu); |
06065c45 PM |
148 | /* qemu_init_cpu_list() takes care of reinitializing the |
149 | * exclusive state, so we don't need to end_exclusive() here. | |
150 | */ | |
d5975363 | 151 | } else { |
267f685b | 152 | cpu_list_unlock(); |
06065c45 | 153 | end_exclusive(); |
d5975363 | 154 | } |
d5975363 PB |
155 | } |
156 | ||
b44316fb | 157 | __thread CPUState *thread_cpu; |
59faf6d6 | 158 | |
178f9429 SF |
159 | bool qemu_cpu_is_self(CPUState *cpu) |
160 | { | |
161 | return thread_cpu == cpu; | |
162 | } | |
163 | ||
164 | void qemu_cpu_kick(CPUState *cpu) | |
165 | { | |
166 | cpu_exit(cpu); | |
167 | } | |
168 | ||
edf8e2af MW |
169 | void task_settid(TaskState *ts) |
170 | { | |
171 | if (ts->ts_tid == 0) { | |
edf8e2af | 172 | ts->ts_tid = (pid_t)syscall(SYS_gettid); |
edf8e2af MW |
173 | } |
174 | } | |
175 | ||
176 | void stop_all_tasks(void) | |
177 | { | |
178 | /* | |
179 | * We trust that when using NPTL, start_exclusive() | |
180 | * handles thread stopping correctly. | |
181 | */ | |
182 | start_exclusive(); | |
183 | } | |
184 | ||
c3a92833 | 185 | /* Assumes contents are already zeroed. */ |
624f7979 PB |
186 | void init_task_state(TaskState *ts) |
187 | { | |
624f7979 | 188 | ts->used = 1; |
5bfce0b7 PM |
189 | ts->sigaltstack_used = (struct target_sigaltstack) { |
190 | .ss_sp = 0, | |
191 | .ss_size = 0, | |
192 | .ss_flags = TARGET_SS_DISABLE, | |
193 | }; | |
624f7979 | 194 | } |
fc9c5412 | 195 | |
30ba0ee5 AF |
196 | CPUArchState *cpu_copy(CPUArchState *env) |
197 | { | |
29a0af61 | 198 | CPUState *cpu = env_cpu(env); |
2278b939 | 199 | CPUState *new_cpu = cpu_create(cpu_type); |
61c7480f | 200 | CPUArchState *new_env = new_cpu->env_ptr; |
30ba0ee5 AF |
201 | CPUBreakpoint *bp; |
202 | CPUWatchpoint *wp; | |
30ba0ee5 AF |
203 | |
204 | /* Reset non arch specific state */ | |
75a34036 | 205 | cpu_reset(new_cpu); |
30ba0ee5 AF |
206 | |
207 | memcpy(new_env, env, sizeof(CPUArchState)); | |
208 | ||
209 | /* Clone all break/watchpoints. | |
210 | Note: Once we support ptrace with hw-debug register access, make sure | |
211 | BP_CPU break/watchpoints are handled correctly on clone. */ | |
1d085f6c TB |
212 | QTAILQ_INIT(&new_cpu->breakpoints); |
213 | QTAILQ_INIT(&new_cpu->watchpoints); | |
f0c3c505 | 214 | QTAILQ_FOREACH(bp, &cpu->breakpoints, entry) { |
b3310ab3 | 215 | cpu_breakpoint_insert(new_cpu, bp->pc, bp->flags, NULL); |
30ba0ee5 | 216 | } |
ff4700b0 | 217 | QTAILQ_FOREACH(wp, &cpu->watchpoints, entry) { |
05068c0d | 218 | cpu_watchpoint_insert(new_cpu, wp->vaddr, wp->len, wp->flags, NULL); |
30ba0ee5 | 219 | } |
30ba0ee5 AF |
220 | |
221 | return new_env; | |
222 | } | |
223 | ||
fc9c5412 JS |
224 | static void handle_arg_help(const char *arg) |
225 | { | |
4d1275c2 | 226 | usage(EXIT_SUCCESS); |
fc9c5412 JS |
227 | } |
228 | ||
229 | static void handle_arg_log(const char *arg) | |
230 | { | |
4b25a506 JK |
231 | last_log_mask = qemu_str_to_log_mask(arg); |
232 | if (!last_log_mask) { | |
59a6fa6e | 233 | qemu_print_log_usage(stdout); |
4d1275c2 | 234 | exit(EXIT_FAILURE); |
fc9c5412 | 235 | } |
fc9c5412 JS |
236 | } |
237 | ||
8423fa90 AB |
238 | static void handle_arg_dfilter(const char *arg) |
239 | { | |
7f4341e8 | 240 | qemu_set_dfilter_ranges(arg, &error_fatal); |
8423fa90 AB |
241 | } |
242 | ||
50171d42 CWR |
243 | static void handle_arg_log_filename(const char *arg) |
244 | { | |
daa76aa4 | 245 | qemu_set_log_filename(arg, &error_fatal); |
50171d42 CWR |
246 | } |
247 | ||
fc9c5412 JS |
248 | static void handle_arg_set_env(const char *arg) |
249 | { | |
250 | char *r, *p, *token; | |
251 | r = p = strdup(arg); | |
252 | while ((token = strsep(&p, ",")) != NULL) { | |
253 | if (envlist_setenv(envlist, token) != 0) { | |
4d1275c2 | 254 | usage(EXIT_FAILURE); |
fc9c5412 JS |
255 | } |
256 | } | |
257 | free(r); | |
258 | } | |
259 | ||
260 | static void handle_arg_unset_env(const char *arg) | |
261 | { | |
262 | char *r, *p, *token; | |
263 | r = p = strdup(arg); | |
264 | while ((token = strsep(&p, ",")) != NULL) { | |
265 | if (envlist_unsetenv(envlist, token) != 0) { | |
4d1275c2 | 266 | usage(EXIT_FAILURE); |
fc9c5412 JS |
267 | } |
268 | } | |
269 | free(r); | |
270 | } | |
271 | ||
272 | static void handle_arg_argv0(const char *arg) | |
273 | { | |
274 | argv0 = strdup(arg); | |
275 | } | |
276 | ||
277 | static void handle_arg_stack_size(const char *arg) | |
278 | { | |
279 | char *p; | |
280 | guest_stack_size = strtoul(arg, &p, 0); | |
281 | if (guest_stack_size == 0) { | |
4d1275c2 | 282 | usage(EXIT_FAILURE); |
fc9c5412 JS |
283 | } |
284 | ||
285 | if (*p == 'M') { | |
b52713c1 | 286 | guest_stack_size *= MiB; |
fc9c5412 | 287 | } else if (*p == 'k' || *p == 'K') { |
b52713c1 | 288 | guest_stack_size *= KiB; |
fc9c5412 JS |
289 | } |
290 | } | |
291 | ||
292 | static void handle_arg_ld_prefix(const char *arg) | |
293 | { | |
294 | interp_prefix = strdup(arg); | |
295 | } | |
296 | ||
297 | static void handle_arg_pagesize(const char *arg) | |
298 | { | |
299 | qemu_host_page_size = atoi(arg); | |
300 | if (qemu_host_page_size == 0 || | |
301 | (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) { | |
302 | fprintf(stderr, "page size must be a power of two\n"); | |
4d1275c2 | 303 | exit(EXIT_FAILURE); |
fc9c5412 JS |
304 | } |
305 | } | |
306 | ||
5ebdd774 | 307 | static void handle_arg_seed(const char *arg) |
c5e4a5a9 | 308 | { |
5ebdd774 | 309 | seed_optarg = arg; |
c5e4a5a9 MR |
310 | } |
311 | ||
fc9c5412 JS |
312 | static void handle_arg_gdb(const char *arg) |
313 | { | |
fcedd920 | 314 | gdbstub = g_strdup(arg); |
fc9c5412 JS |
315 | } |
316 | ||
317 | static void handle_arg_uname(const char *arg) | |
318 | { | |
319 | qemu_uname_release = strdup(arg); | |
320 | } | |
321 | ||
322 | static void handle_arg_cpu(const char *arg) | |
323 | { | |
324 | cpu_model = strdup(arg); | |
c8057f95 | 325 | if (cpu_model == NULL || is_help_option(cpu_model)) { |
fc9c5412 | 326 | /* XXX: implement xxx_cpu_list for targets that still miss it */ |
e916cbf8 | 327 | #if defined(cpu_list) |
0442428a | 328 | cpu_list(); |
fc9c5412 | 329 | #endif |
4d1275c2 | 330 | exit(EXIT_FAILURE); |
fc9c5412 JS |
331 | } |
332 | } | |
333 | ||
fc9c5412 JS |
334 | static void handle_arg_guest_base(const char *arg) |
335 | { | |
336 | guest_base = strtol(arg, NULL, 0); | |
e307c192 | 337 | have_guest_base = true; |
fc9c5412 JS |
338 | } |
339 | ||
340 | static void handle_arg_reserved_va(const char *arg) | |
341 | { | |
342 | char *p; | |
343 | int shift = 0; | |
344 | reserved_va = strtoul(arg, &p, 0); | |
345 | switch (*p) { | |
346 | case 'k': | |
347 | case 'K': | |
348 | shift = 10; | |
349 | break; | |
350 | case 'M': | |
351 | shift = 20; | |
352 | break; | |
353 | case 'G': | |
354 | shift = 30; | |
355 | break; | |
356 | } | |
357 | if (shift) { | |
358 | unsigned long unshifted = reserved_va; | |
359 | p++; | |
360 | reserved_va <<= shift; | |
8f67b9c6 | 361 | if (reserved_va >> shift != unshifted) { |
fc9c5412 | 362 | fprintf(stderr, "Reserved virtual address too big\n"); |
4d1275c2 | 363 | exit(EXIT_FAILURE); |
fc9c5412 JS |
364 | } |
365 | } | |
366 | if (*p) { | |
367 | fprintf(stderr, "Unrecognised -R size suffix '%s'\n", p); | |
4d1275c2 | 368 | exit(EXIT_FAILURE); |
fc9c5412 JS |
369 | } |
370 | } | |
fc9c5412 JS |
371 | |
372 | static void handle_arg_singlestep(const char *arg) | |
373 | { | |
374 | singlestep = 1; | |
375 | } | |
376 | ||
377 | static void handle_arg_strace(const char *arg) | |
378 | { | |
4b25a506 | 379 | enable_strace = true; |
fc9c5412 JS |
380 | } |
381 | ||
382 | static void handle_arg_version(const char *arg) | |
383 | { | |
7e563bfb | 384 | printf("qemu-" TARGET_NAME " version " QEMU_FULL_VERSION |
0781dd6e | 385 | "\n" QEMU_COPYRIGHT "\n"); |
4d1275c2 | 386 | exit(EXIT_SUCCESS); |
fc9c5412 JS |
387 | } |
388 | ||
6533dd6e LV |
389 | static char *trace_file; |
390 | static void handle_arg_trace(const char *arg) | |
391 | { | |
392 | g_free(trace_file); | |
393 | trace_file = trace_opt_parse(arg); | |
394 | } | |
395 | ||
130ea832 MF |
396 | #if defined(TARGET_XTENSA) |
397 | static void handle_arg_abi_call0(const char *arg) | |
398 | { | |
399 | xtensa_set_abi_call0(); | |
400 | } | |
401 | #endif | |
402 | ||
f308f64e LV |
403 | static QemuPluginList plugins = QTAILQ_HEAD_INITIALIZER(plugins); |
404 | ||
405 | #ifdef CONFIG_PLUGIN | |
406 | static void handle_arg_plugin(const char *arg) | |
407 | { | |
408 | qemu_plugin_opt_parse(arg, &plugins); | |
409 | } | |
410 | #endif | |
411 | ||
fc9c5412 JS |
412 | struct qemu_argument { |
413 | const char *argv; | |
414 | const char *env; | |
415 | bool has_arg; | |
416 | void (*handle_opt)(const char *arg); | |
417 | const char *example; | |
418 | const char *help; | |
419 | }; | |
420 | ||
42644cee | 421 | static const struct qemu_argument arg_table[] = { |
fc9c5412 JS |
422 | {"h", "", false, handle_arg_help, |
423 | "", "print this help"}, | |
daaf8c8e MI |
424 | {"help", "", false, handle_arg_help, |
425 | "", ""}, | |
fc9c5412 JS |
426 | {"g", "QEMU_GDB", true, handle_arg_gdb, |
427 | "port", "wait gdb connection to 'port'"}, | |
428 | {"L", "QEMU_LD_PREFIX", true, handle_arg_ld_prefix, | |
429 | "path", "set the elf interpreter prefix to 'path'"}, | |
430 | {"s", "QEMU_STACK_SIZE", true, handle_arg_stack_size, | |
431 | "size", "set the stack size to 'size' bytes"}, | |
432 | {"cpu", "QEMU_CPU", true, handle_arg_cpu, | |
c8057f95 | 433 | "model", "select CPU (-cpu help for list)"}, |
fc9c5412 JS |
434 | {"E", "QEMU_SET_ENV", true, handle_arg_set_env, |
435 | "var=value", "sets targets environment variable (see below)"}, | |
436 | {"U", "QEMU_UNSET_ENV", true, handle_arg_unset_env, | |
437 | "var", "unsets targets environment variable (see below)"}, | |
438 | {"0", "QEMU_ARGV0", true, handle_arg_argv0, | |
439 | "argv0", "forces target process argv[0] to be 'argv0'"}, | |
440 | {"r", "QEMU_UNAME", true, handle_arg_uname, | |
441 | "uname", "set qemu uname release string to 'uname'"}, | |
fc9c5412 JS |
442 | {"B", "QEMU_GUEST_BASE", true, handle_arg_guest_base, |
443 | "address", "set guest_base address to 'address'"}, | |
444 | {"R", "QEMU_RESERVED_VA", true, handle_arg_reserved_va, | |
445 | "size", "reserve 'size' bytes for guest virtual address space"}, | |
fc9c5412 | 446 | {"d", "QEMU_LOG", true, handle_arg_log, |
989b697d PM |
447 | "item[,...]", "enable logging of specified items " |
448 | "(use '-d help' for a list of items)"}, | |
8423fa90 AB |
449 | {"dfilter", "QEMU_DFILTER", true, handle_arg_dfilter, |
450 | "range[,...]","filter logging based on address range"}, | |
50171d42 | 451 | {"D", "QEMU_LOG_FILENAME", true, handle_arg_log_filename, |
989b697d | 452 | "logfile", "write logs to 'logfile' (default stderr)"}, |
fc9c5412 JS |
453 | {"p", "QEMU_PAGESIZE", true, handle_arg_pagesize, |
454 | "pagesize", "set the host page size to 'pagesize'"}, | |
455 | {"singlestep", "QEMU_SINGLESTEP", false, handle_arg_singlestep, | |
456 | "", "run in singlestep mode"}, | |
457 | {"strace", "QEMU_STRACE", false, handle_arg_strace, | |
458 | "", "log system calls"}, | |
5ebdd774 | 459 | {"seed", "QEMU_RAND_SEED", true, handle_arg_seed, |
c5e4a5a9 | 460 | "", "Seed for pseudo-random number generator"}, |
6533dd6e LV |
461 | {"trace", "QEMU_TRACE", true, handle_arg_trace, |
462 | "", "[[enable=]<pattern>][,events=<file>][,file=<file>]"}, | |
f308f64e LV |
463 | #ifdef CONFIG_PLUGIN |
464 | {"plugin", "QEMU_PLUGIN", true, handle_arg_plugin, | |
465 | "", "[file=]<file>[,arg=<string>]"}, | |
466 | #endif | |
fc9c5412 | 467 | {"version", "QEMU_VERSION", false, handle_arg_version, |
1386d4c0 | 468 | "", "display version information and exit"}, |
130ea832 MF |
469 | #if defined(TARGET_XTENSA) |
470 | {"xtensa-abi-call0", "QEMU_XTENSA_ABI_CALL0", false, handle_arg_abi_call0, | |
471 | "", "assume CALL0 Xtensa ABI"}, | |
472 | #endif | |
fc9c5412 JS |
473 | {NULL, NULL, false, NULL, NULL, NULL} |
474 | }; | |
475 | ||
d03f9c32 | 476 | static void usage(int exitcode) |
fc9c5412 | 477 | { |
42644cee | 478 | const struct qemu_argument *arginfo; |
fc9c5412 JS |
479 | int maxarglen; |
480 | int maxenvlen; | |
481 | ||
2e59915d PB |
482 | printf("usage: qemu-" TARGET_NAME " [options] program [arguments...]\n" |
483 | "Linux CPU emulator (compiled for " TARGET_NAME " emulation)\n" | |
fc9c5412 JS |
484 | "\n" |
485 | "Options and associated environment variables:\n" | |
486 | "\n"); | |
487 | ||
63ec54d7 PM |
488 | /* Calculate column widths. We must always have at least enough space |
489 | * for the column header. | |
490 | */ | |
491 | maxarglen = strlen("Argument"); | |
492 | maxenvlen = strlen("Env-variable"); | |
fc9c5412 JS |
493 | |
494 | for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) { | |
63ec54d7 PM |
495 | int arglen = strlen(arginfo->argv); |
496 | if (arginfo->has_arg) { | |
497 | arglen += strlen(arginfo->example) + 1; | |
498 | } | |
fc9c5412 JS |
499 | if (strlen(arginfo->env) > maxenvlen) { |
500 | maxenvlen = strlen(arginfo->env); | |
501 | } | |
63ec54d7 PM |
502 | if (arglen > maxarglen) { |
503 | maxarglen = arglen; | |
fc9c5412 JS |
504 | } |
505 | } | |
506 | ||
63ec54d7 PM |
507 | printf("%-*s %-*s Description\n", maxarglen+1, "Argument", |
508 | maxenvlen, "Env-variable"); | |
fc9c5412 JS |
509 | |
510 | for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) { | |
511 | if (arginfo->has_arg) { | |
512 | printf("-%s %-*s %-*s %s\n", arginfo->argv, | |
63ec54d7 PM |
513 | (int)(maxarglen - strlen(arginfo->argv) - 1), |
514 | arginfo->example, maxenvlen, arginfo->env, arginfo->help); | |
fc9c5412 | 515 | } else { |
63ec54d7 | 516 | printf("-%-*s %-*s %s\n", maxarglen, arginfo->argv, |
fc9c5412 JS |
517 | maxenvlen, arginfo->env, |
518 | arginfo->help); | |
519 | } | |
520 | } | |
521 | ||
522 | printf("\n" | |
523 | "Defaults:\n" | |
524 | "QEMU_LD_PREFIX = %s\n" | |
989b697d | 525 | "QEMU_STACK_SIZE = %ld byte\n", |
fc9c5412 | 526 | interp_prefix, |
989b697d | 527 | guest_stack_size); |
fc9c5412 JS |
528 | |
529 | printf("\n" | |
530 | "You can use -E and -U options or the QEMU_SET_ENV and\n" | |
531 | "QEMU_UNSET_ENV environment variables to set and unset\n" | |
532 | "environment variables for the target process.\n" | |
533 | "It is possible to provide several variables by separating them\n" | |
534 | "by commas in getsubopt(3) style. Additionally it is possible to\n" | |
535 | "provide the -E and -U options multiple times.\n" | |
536 | "The following lines are equivalent:\n" | |
537 | " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n" | |
538 | " -E var1=val2,var2=val2 -U LD_PRELOAD,LD_DEBUG\n" | |
539 | " QEMU_SET_ENV=var1=val2,var2=val2 QEMU_UNSET_ENV=LD_PRELOAD,LD_DEBUG\n" | |
540 | "Note that if you provide several changes to a single variable\n" | |
f5048cb7 EB |
541 | "the last change will stay in effect.\n" |
542 | "\n" | |
543 | QEMU_HELP_BOTTOM "\n"); | |
fc9c5412 | 544 | |
d03f9c32 | 545 | exit(exitcode); |
fc9c5412 JS |
546 | } |
547 | ||
548 | static int parse_args(int argc, char **argv) | |
549 | { | |
550 | const char *r; | |
551 | int optind; | |
42644cee | 552 | const struct qemu_argument *arginfo; |
fc9c5412 JS |
553 | |
554 | for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) { | |
555 | if (arginfo->env == NULL) { | |
556 | continue; | |
557 | } | |
558 | ||
559 | r = getenv(arginfo->env); | |
560 | if (r != NULL) { | |
561 | arginfo->handle_opt(r); | |
562 | } | |
563 | } | |
564 | ||
565 | optind = 1; | |
566 | for (;;) { | |
567 | if (optind >= argc) { | |
568 | break; | |
569 | } | |
570 | r = argv[optind]; | |
571 | if (r[0] != '-') { | |
572 | break; | |
573 | } | |
574 | optind++; | |
575 | r++; | |
576 | if (!strcmp(r, "-")) { | |
577 | break; | |
578 | } | |
ba02577c MI |
579 | /* Treat --foo the same as -foo. */ |
580 | if (r[0] == '-') { | |
581 | r++; | |
582 | } | |
fc9c5412 JS |
583 | |
584 | for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) { | |
585 | if (!strcmp(r, arginfo->argv)) { | |
fc9c5412 | 586 | if (arginfo->has_arg) { |
1386d4c0 | 587 | if (optind >= argc) { |
138940bf MI |
588 | (void) fprintf(stderr, |
589 | "qemu: missing argument for option '%s'\n", r); | |
4d1275c2 | 590 | exit(EXIT_FAILURE); |
1386d4c0 PM |
591 | } |
592 | arginfo->handle_opt(argv[optind]); | |
fc9c5412 | 593 | optind++; |
1386d4c0 PM |
594 | } else { |
595 | arginfo->handle_opt(NULL); | |
fc9c5412 | 596 | } |
fc9c5412 JS |
597 | break; |
598 | } | |
599 | } | |
600 | ||
601 | /* no option matched the current argv */ | |
602 | if (arginfo->handle_opt == NULL) { | |
138940bf | 603 | (void) fprintf(stderr, "qemu: unknown option '%s'\n", r); |
4d1275c2 | 604 | exit(EXIT_FAILURE); |
fc9c5412 JS |
605 | } |
606 | } | |
607 | ||
608 | if (optind >= argc) { | |
138940bf | 609 | (void) fprintf(stderr, "qemu: no user program specified\n"); |
4d1275c2 | 610 | exit(EXIT_FAILURE); |
fc9c5412 JS |
611 | } |
612 | ||
fc9c5412 JS |
613 | exec_path = argv[optind]; |
614 | ||
615 | return optind; | |
616 | } | |
617 | ||
902b3d5c | 618 | int main(int argc, char **argv, char **envp) |
31e31b8a | 619 | { |
01ffc75b | 620 | struct target_pt_regs regs1, *regs = ®s1; |
31e31b8a | 621 | struct image_info info1, *info = &info1; |
edf8e2af | 622 | struct linux_binprm bprm; |
48e15fc2 | 623 | TaskState *ts; |
9349b4f9 | 624 | CPUArchState *env; |
db6b81d4 | 625 | CPUState *cpu; |
586314f2 | 626 | int optind; |
04a6dfeb | 627 | char **target_environ, **wrk; |
7d8cec95 AJ |
628 | char **target_argv; |
629 | int target_argc; | |
7d8cec95 | 630 | int i; |
fd4d81dd | 631 | int ret; |
03cfd8fa | 632 | int execfd; |
4b25a506 | 633 | int log_mask; |
8f67b9c6 | 634 | unsigned long max_reserved_va; |
b12b6a18 | 635 | |
f5852efa | 636 | error_init(argv[0]); |
fe4db84d | 637 | module_call_init(MODULE_INIT_TRACE); |
267f685b | 638 | qemu_init_cpu_list(); |
ce008c1f AF |
639 | module_call_init(MODULE_INIT_QOM); |
640 | ||
ec45bbe5 | 641 | envlist = envlist_create(); |
04a6dfeb AJ |
642 | |
643 | /* add current environment into the list */ | |
644 | for (wrk = environ; *wrk != NULL; wrk++) { | |
645 | (void) envlist_setenv(envlist, *wrk); | |
646 | } | |
647 | ||
703e0e89 RH |
648 | /* Read the stack limit from the kernel. If it's "unlimited", |
649 | then we can do little else besides use the default. */ | |
650 | { | |
651 | struct rlimit lim; | |
652 | if (getrlimit(RLIMIT_STACK, &lim) == 0 | |
81bbe906 TY |
653 | && lim.rlim_cur != RLIM_INFINITY |
654 | && lim.rlim_cur == (target_long)lim.rlim_cur) { | |
703e0e89 RH |
655 | guest_stack_size = lim.rlim_cur; |
656 | } | |
657 | } | |
658 | ||
b1f9be31 | 659 | cpu_model = NULL; |
b5ec5ce0 | 660 | |
6533dd6e | 661 | qemu_add_opts(&qemu_trace_opts); |
f308f64e | 662 | qemu_plugin_add_opts(); |
6533dd6e | 663 | |
fc9c5412 | 664 | optind = parse_args(argc, argv); |
586314f2 | 665 | |
4b25a506 JK |
666 | log_mask = last_log_mask | (enable_strace ? LOG_STRACE : 0); |
667 | if (log_mask) { | |
668 | qemu_log_needs_buffers(); | |
669 | qemu_set_log(log_mask); | |
670 | } | |
671 | ||
6533dd6e LV |
672 | if (!trace_init_backends()) { |
673 | exit(1); | |
674 | } | |
675 | trace_init_file(trace_file); | |
f308f64e LV |
676 | if (qemu_plugin_load_list(&plugins)) { |
677 | exit(1); | |
678 | } | |
6533dd6e | 679 | |
31e31b8a | 680 | /* Zero out regs */ |
01ffc75b | 681 | memset(regs, 0, sizeof(struct target_pt_regs)); |
31e31b8a FB |
682 | |
683 | /* Zero out image_info */ | |
684 | memset(info, 0, sizeof(struct image_info)); | |
685 | ||
edf8e2af MW |
686 | memset(&bprm, 0, sizeof (bprm)); |
687 | ||
74cd30b8 FB |
688 | /* Scan interp_prefix dir for replacement files. */ |
689 | init_paths(interp_prefix); | |
690 | ||
4a24a758 PM |
691 | init_qemu_uname_release(); |
692 | ||
768fe76e YS |
693 | execfd = qemu_getauxval(AT_EXECFD); |
694 | if (execfd == 0) { | |
9d3019bc | 695 | execfd = open(exec_path, O_RDONLY); |
768fe76e | 696 | if (execfd < 0) { |
9d3019bc | 697 | printf("Error while loading %s: %s\n", exec_path, strerror(errno)); |
768fe76e YS |
698 | _exit(EXIT_FAILURE); |
699 | } | |
700 | } | |
701 | ||
46027c07 | 702 | if (cpu_model == NULL) { |
768fe76e | 703 | cpu_model = cpu_get_model(get_elf_eflags(execfd)); |
aaed909a | 704 | } |
c1c8cfe5 | 705 | cpu_type = parse_cpu_option(cpu_model); |
2278b939 | 706 | |
2b5249b8 | 707 | /* init tcg before creating CPUs and to get qemu_host_page_size */ |
d5ab9713 | 708 | tcg_exec_init(0); |
2278b939 IM |
709 | |
710 | cpu = cpu_create(cpu_type); | |
2994fd96 | 711 | env = cpu->env_ptr; |
0ac46af3 | 712 | cpu_reset(cpu); |
db6b81d4 | 713 | thread_cpu = cpu; |
3b46e624 | 714 | |
8f67b9c6 RH |
715 | /* |
716 | * Reserving too much vm space via mmap can run into problems | |
717 | * with rlimits, oom due to page table creation, etc. We will | |
718 | * still try it, if directed by the command-line option, but | |
719 | * not by default. | |
720 | */ | |
721 | max_reserved_va = MAX_RESERVED_VA(cpu); | |
722 | if (reserved_va != 0) { | |
723 | if (max_reserved_va && reserved_va > max_reserved_va) { | |
724 | fprintf(stderr, "Reserved virtual address too big\n"); | |
725 | exit(EXIT_FAILURE); | |
726 | } | |
727 | } else if (HOST_LONG_BITS == 64 && TARGET_VIRT_ADDR_SPACE_BITS <= 32) { | |
728 | /* | |
729 | * reserved_va must be aligned with the host page size | |
730 | * as it is used with mmap() | |
731 | */ | |
732 | reserved_va = max_reserved_va & qemu_host_page_mask; | |
733 | } | |
734 | ||
a573e9ba RH |
735 | { |
736 | Error *err = NULL; | |
737 | if (seed_optarg != NULL) { | |
a573e9ba RH |
738 | qemu_guest_random_seed_main(seed_optarg, &err); |
739 | } else { | |
740 | qcrypto_init(&err); | |
741 | } | |
742 | if (err) { | |
743 | error_reportf_err(err, "cannot initialize crypto: "); | |
744 | exit(1); | |
5ebdd774 | 745 | } |
c5e4a5a9 MR |
746 | } |
747 | ||
04a6dfeb AJ |
748 | target_environ = envlist_to_environ(envlist, NULL); |
749 | envlist_free(envlist); | |
b12b6a18 | 750 | |
379f6698 PB |
751 | /* |
752 | * Read in mmap_min_addr kernel parameter. This value is used | |
753 | * When loading the ELF image to determine whether guest_base | |
14f24e14 | 754 | * is needed. It is also used in mmap_find_vma. |
379f6698 | 755 | */ |
14f24e14 | 756 | { |
379f6698 PB |
757 | FILE *fp; |
758 | ||
759 | if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) { | |
760 | unsigned long tmp; | |
761 | if (fscanf(fp, "%lu", &tmp) == 1) { | |
762 | mmap_min_addr = tmp; | |
13829020 | 763 | qemu_log_mask(CPU_LOG_PAGE, "host mmap_min_addr=0x%lx\n", mmap_min_addr); |
379f6698 PB |
764 | } |
765 | fclose(fp); | |
766 | } | |
767 | } | |
379f6698 | 768 | |
7d8cec95 AJ |
769 | /* |
770 | * Prepare copy of argv vector for target. | |
771 | */ | |
772 | target_argc = argc - optind; | |
773 | target_argv = calloc(target_argc + 1, sizeof (char *)); | |
774 | if (target_argv == NULL) { | |
7d37435b PB |
775 | (void) fprintf(stderr, "Unable to allocate memory for target_argv\n"); |
776 | exit(EXIT_FAILURE); | |
7d8cec95 AJ |
777 | } |
778 | ||
779 | /* | |
780 | * If argv0 is specified (using '-0' switch) we replace | |
781 | * argv[0] pointer with the given one. | |
782 | */ | |
783 | i = 0; | |
784 | if (argv0 != NULL) { | |
785 | target_argv[i++] = strdup(argv0); | |
786 | } | |
787 | for (; i < target_argc; i++) { | |
788 | target_argv[i] = strdup(argv[optind + i]); | |
789 | } | |
790 | target_argv[target_argc] = NULL; | |
791 | ||
c78d65e8 | 792 | ts = g_new0(TaskState, 1); |
edf8e2af MW |
793 | init_task_state(ts); |
794 | /* build Task State */ | |
795 | ts->info = info; | |
796 | ts->bprm = &bprm; | |
0429a971 | 797 | cpu->opaque = ts; |
edf8e2af MW |
798 | task_settid(ts); |
799 | ||
9d3019bc | 800 | ret = loader_exec(execfd, exec_path, target_argv, target_environ, regs, |
fd4d81dd AP |
801 | info, &bprm); |
802 | if (ret != 0) { | |
9d3019bc | 803 | printf("Error while loading %s: %s\n", exec_path, strerror(-ret)); |
4d1275c2 | 804 | _exit(EXIT_FAILURE); |
b12b6a18 TS |
805 | } |
806 | ||
807 | for (wrk = target_environ; *wrk; wrk++) { | |
ec45bbe5 | 808 | g_free(*wrk); |
31e31b8a | 809 | } |
3b46e624 | 810 | |
ec45bbe5 | 811 | g_free(target_environ); |
b12b6a18 | 812 | |
13829020 | 813 | if (qemu_loglevel_mask(CPU_LOG_PAGE)) { |
379f6698 | 814 | qemu_log("guest_base 0x%lx\n", guest_base); |
10d0d505 | 815 | log_page_dump("binary load"); |
2e77eac6 BS |
816 | |
817 | qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk); | |
818 | qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code); | |
7c4ee5bc RH |
819 | qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n", info->start_code); |
820 | qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n", info->start_data); | |
2e77eac6 | 821 | qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data); |
7c4ee5bc | 822 | qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n", info->start_stack); |
2e77eac6 BS |
823 | qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk); |
824 | qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry); | |
7c4ee5bc RH |
825 | qemu_log("argv_start 0x" TARGET_ABI_FMT_lx "\n", info->arg_start); |
826 | qemu_log("env_start 0x" TARGET_ABI_FMT_lx "\n", | |
827 | info->arg_end + (abi_ulong)sizeof(abi_ulong)); | |
828 | qemu_log("auxv_start 0x" TARGET_ABI_FMT_lx "\n", info->saved_auxv); | |
2e77eac6 | 829 | } |
31e31b8a | 830 | |
53a5960a | 831 | target_set_brk(info->brk); |
31e31b8a | 832 | syscall_init(); |
66fb9763 | 833 | signal_init(); |
31e31b8a | 834 | |
9002ec79 RH |
835 | /* Now that we've loaded the binary, GUEST_BASE is fixed. Delay |
836 | generating the prologue until now so that the prologue can take | |
837 | the real value of GUEST_BASE into account. */ | |
b1311c4a | 838 | tcg_prologue_init(tcg_ctx); |
e8feb96f | 839 | tcg_region_init(); |
9002ec79 | 840 | |
cd71c089 LV |
841 | target_cpu_copy_regs(env, regs); |
842 | ||
fcedd920 AB |
843 | if (gdbstub) { |
844 | if (gdbserver_start(gdbstub) < 0) { | |
845 | fprintf(stderr, "qemu: could not open gdbserver on %s\n", | |
846 | gdbstub); | |
4d1275c2 | 847 | exit(EXIT_FAILURE); |
ff7a981a | 848 | } |
db6b81d4 | 849 | gdb_handlesig(cpu, 0); |
1fddef4b | 850 | } |
1b6b029e FB |
851 | cpu_loop(env); |
852 | /* never exits */ | |
31e31b8a FB |
853 | return 0; |
854 | } |