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Commit | Line | Data |
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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" |
49f95221 | 21 | #include "qemu/help-texts.h" |
b52713c1 | 22 | #include "qemu/units.h" |
940e43aa | 23 | #include "qemu/accel.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> |
6e1c0d7b | 28 | #include <linux/binfmts.h> |
31e31b8a | 29 | |
daa76aa4 | 30 | #include "qapi/error.h" |
3ef693a0 | 31 | #include "qemu.h" |
3b249d26 | 32 | #include "user-internals.h" |
f348b6d1 | 33 | #include "qemu/path.h" |
dc5e9ac7 | 34 | #include "qemu/queue.h" |
6533dd6e | 35 | #include "qemu/config-file.h" |
f348b6d1 | 36 | #include "qemu/cutils.h" |
f5852efa | 37 | #include "qemu/error-report.h" |
f348b6d1 | 38 | #include "qemu/help_option.h" |
0b8fa32f | 39 | #include "qemu/module.h" |
f308f64e | 40 | #include "qemu/plugin.h" |
63c91552 | 41 | #include "exec/exec-all.h" |
85b4fa0c | 42 | #include "exec/gdbstub.h" |
dcb32f1d | 43 | #include "tcg/tcg.h" |
1de7afc9 PB |
44 | #include "qemu/timer.h" |
45 | #include "qemu/envlist.h" | |
5ebdd774 | 46 | #include "qemu/guest-random.h" |
d8fd2954 | 47 | #include "elf.h" |
6533dd6e | 48 | #include "trace/control.h" |
542ca434 | 49 | #include "target_elf.h" |
cd71c089 | 50 | #include "cpu_loop-common.h" |
a573e9ba | 51 | #include "crypto/init.h" |
c093364f | 52 | #include "fd-trans.h" |
2113aed6 | 53 | #include "signal-common.h" |
3ad0a769 | 54 | #include "loader.h" |
5423e6d3 | 55 | #include "user-mmap.h" |
04a6dfeb | 56 | |
e4a4aaa5 RH |
57 | #ifdef CONFIG_SEMIHOSTING |
58 | #include "semihosting/semihost.h" | |
59 | #endif | |
60 | ||
6e1c0d7b LV |
61 | #ifndef AT_FLAGS_PRESERVE_ARGV0 |
62 | #define AT_FLAGS_PRESERVE_ARGV0_BIT 0 | |
63 | #define AT_FLAGS_PRESERVE_ARGV0 (1 << AT_FLAGS_PRESERVE_ARGV0_BIT) | |
64 | #endif | |
65 | ||
d088d664 AJ |
66 | char *exec_path; |
67 | ||
1b530a6d | 68 | int singlestep; |
8cb76755 | 69 | static const char *argv0; |
fcedd920 | 70 | static const char *gdbstub; |
8cb76755 | 71 | static envlist_t *envlist; |
51fb256a | 72 | static const char *cpu_model; |
2278b939 | 73 | static const char *cpu_type; |
5ebdd774 | 74 | static const char *seed_optarg; |
379f6698 | 75 | unsigned long mmap_min_addr; |
5ca870b9 | 76 | uintptr_t guest_base; |
e307c192 | 77 | bool have_guest_base; |
120a9848 | 78 | |
4b25a506 JK |
79 | /* |
80 | * Used to implement backwards-compatibility for the `-strace`, and | |
81 | * QEMU_STRACE options. Without this, the QEMU_LOG can be overwritten by | |
82 | * -strace, or vice versa. | |
83 | */ | |
84 | static bool enable_strace; | |
85 | ||
86 | /* | |
87 | * The last log mask given by the user in an environment variable or argument. | |
88 | * Used to support command line arguments overriding environment variables. | |
89 | */ | |
90 | static int last_log_mask; | |
b410253f | 91 | static const char *last_log_filename; |
4b25a506 | 92 | |
288e65b9 AG |
93 | /* |
94 | * When running 32-on-64 we should make sure we can fit all of the possible | |
95 | * guest address space into a contiguous chunk of virtual host memory. | |
96 | * | |
97 | * This way we will never overlap with our own libraries or binaries or stack | |
98 | * or anything else that QEMU maps. | |
18e80c55 RH |
99 | * |
100 | * Many cpus reserve the high bit (or more than one for some 64-bit cpus) | |
101 | * of the address for the kernel. Some cpus rely on this and user space | |
102 | * uses the high bit(s) for pointer tagging and the like. For them, we | |
103 | * must preserve the expected address space. | |
288e65b9 | 104 | */ |
18e80c55 RH |
105 | #ifndef MAX_RESERVED_VA |
106 | # if HOST_LONG_BITS > TARGET_VIRT_ADDR_SPACE_BITS | |
107 | # if TARGET_VIRT_ADDR_SPACE_BITS == 32 && \ | |
108 | (TARGET_LONG_BITS == 32 || defined(TARGET_ABI32)) | |
109 | /* There are a number of places where we assign reserved_va to a variable | |
110 | of type abi_ulong and expect it to fit. Avoid the last page. */ | |
8f67b9c6 | 111 | # define MAX_RESERVED_VA(CPU) (0xfffffffful & TARGET_PAGE_MASK) |
18e80c55 | 112 | # else |
8f67b9c6 | 113 | # define MAX_RESERVED_VA(CPU) (1ul << TARGET_VIRT_ADDR_SPACE_BITS) |
18e80c55 | 114 | # endif |
314992b1 | 115 | # else |
8f67b9c6 | 116 | # define MAX_RESERVED_VA(CPU) 0 |
314992b1 | 117 | # endif |
18e80c55 RH |
118 | #endif |
119 | ||
68a1c816 | 120 | unsigned long reserved_va; |
1b530a6d | 121 | |
d03f9c32 | 122 | static void usage(int exitcode); |
fc9c5412 | 123 | |
7ee2822c | 124 | static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX; |
e586822a | 125 | const char *qemu_uname_release; |
586314f2 | 126 | |
9de5e440 FB |
127 | /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so |
128 | we allocate a bigger stack. Need a better solution, for example | |
129 | by remapping the process stack directly at the right place */ | |
703e0e89 | 130 | unsigned long guest_stack_size = 8 * 1024 * 1024UL; |
31e31b8a | 131 | |
d5975363 PB |
132 | /***********************************************************/ |
133 | /* Helper routines for implementing atomic operations. */ | |
134 | ||
d5975363 PB |
135 | /* Make sure everything is in a consistent state for calling fork(). */ |
136 | void fork_start(void) | |
137 | { | |
06065c45 | 138 | start_exclusive(); |
d032d1b4 | 139 | mmap_fork_start(); |
024949ca | 140 | cpu_list_lock(); |
d5975363 PB |
141 | } |
142 | ||
143 | void fork_end(int child) | |
144 | { | |
d032d1b4 | 145 | mmap_fork_end(child); |
d5975363 | 146 | if (child) { |
bdc44640 | 147 | CPUState *cpu, *next_cpu; |
d5975363 PB |
148 | /* Child processes created by fork() only have a single thread. |
149 | Discard information about the parent threads. */ | |
bdc44640 AF |
150 | CPU_FOREACH_SAFE(cpu, next_cpu) { |
151 | if (cpu != thread_cpu) { | |
068a5ea0 | 152 | QTAILQ_REMOVE_RCU(&cpus, cpu, node); |
bdc44640 AF |
153 | } |
154 | } | |
267f685b | 155 | qemu_init_cpu_list(); |
f7ec7f7b | 156 | gdbserver_fork(thread_cpu); |
06065c45 PM |
157 | /* qemu_init_cpu_list() takes care of reinitializing the |
158 | * exclusive state, so we don't need to end_exclusive() here. | |
159 | */ | |
d5975363 | 160 | } else { |
267f685b | 161 | cpu_list_unlock(); |
06065c45 | 162 | end_exclusive(); |
d5975363 | 163 | } |
d5975363 PB |
164 | } |
165 | ||
b44316fb | 166 | __thread CPUState *thread_cpu; |
59faf6d6 | 167 | |
178f9429 SF |
168 | bool qemu_cpu_is_self(CPUState *cpu) |
169 | { | |
170 | return thread_cpu == cpu; | |
171 | } | |
172 | ||
173 | void qemu_cpu_kick(CPUState *cpu) | |
174 | { | |
175 | cpu_exit(cpu); | |
176 | } | |
177 | ||
edf8e2af MW |
178 | void task_settid(TaskState *ts) |
179 | { | |
180 | if (ts->ts_tid == 0) { | |
edf8e2af | 181 | ts->ts_tid = (pid_t)syscall(SYS_gettid); |
edf8e2af MW |
182 | } |
183 | } | |
184 | ||
185 | void stop_all_tasks(void) | |
186 | { | |
187 | /* | |
188 | * We trust that when using NPTL, start_exclusive() | |
189 | * handles thread stopping correctly. | |
190 | */ | |
191 | start_exclusive(); | |
192 | } | |
193 | ||
c3a92833 | 194 | /* Assumes contents are already zeroed. */ |
624f7979 PB |
195 | void init_task_state(TaskState *ts) |
196 | { | |
eb33cdae CE |
197 | long ticks_per_sec; |
198 | struct timespec bt; | |
199 | ||
624f7979 | 200 | ts->used = 1; |
5bfce0b7 PM |
201 | ts->sigaltstack_used = (struct target_sigaltstack) { |
202 | .ss_sp = 0, | |
203 | .ss_size = 0, | |
204 | .ss_flags = TARGET_SS_DISABLE, | |
205 | }; | |
eb33cdae CE |
206 | |
207 | /* Capture task start time relative to system boot */ | |
208 | ||
209 | ticks_per_sec = sysconf(_SC_CLK_TCK); | |
210 | ||
211 | if ((ticks_per_sec > 0) && !clock_gettime(CLOCK_BOOTTIME, &bt)) { | |
212 | /* start_boottime is expressed in clock ticks */ | |
213 | ts->start_boottime = bt.tv_sec * (uint64_t) ticks_per_sec; | |
214 | ts->start_boottime += bt.tv_nsec * (uint64_t) ticks_per_sec / | |
215 | NANOSECONDS_PER_SECOND; | |
216 | } | |
624f7979 | 217 | } |
fc9c5412 | 218 | |
30ba0ee5 AF |
219 | CPUArchState *cpu_copy(CPUArchState *env) |
220 | { | |
29a0af61 | 221 | CPUState *cpu = env_cpu(env); |
2278b939 | 222 | CPUState *new_cpu = cpu_create(cpu_type); |
61c7480f | 223 | CPUArchState *new_env = new_cpu->env_ptr; |
30ba0ee5 | 224 | CPUBreakpoint *bp; |
30ba0ee5 AF |
225 | |
226 | /* Reset non arch specific state */ | |
75a34036 | 227 | cpu_reset(new_cpu); |
30ba0ee5 | 228 | |
6cc9d67c | 229 | new_cpu->tcg_cflags = cpu->tcg_cflags; |
30ba0ee5 AF |
230 | memcpy(new_env, env, sizeof(CPUArchState)); |
231 | ||
232 | /* Clone all break/watchpoints. | |
233 | Note: Once we support ptrace with hw-debug register access, make sure | |
234 | BP_CPU break/watchpoints are handled correctly on clone. */ | |
1d085f6c | 235 | QTAILQ_INIT(&new_cpu->breakpoints); |
f0c3c505 | 236 | QTAILQ_FOREACH(bp, &cpu->breakpoints, entry) { |
b3310ab3 | 237 | cpu_breakpoint_insert(new_cpu, bp->pc, bp->flags, NULL); |
30ba0ee5 | 238 | } |
30ba0ee5 AF |
239 | |
240 | return new_env; | |
241 | } | |
242 | ||
fc9c5412 JS |
243 | static void handle_arg_help(const char *arg) |
244 | { | |
4d1275c2 | 245 | usage(EXIT_SUCCESS); |
fc9c5412 JS |
246 | } |
247 | ||
248 | static void handle_arg_log(const char *arg) | |
249 | { | |
4b25a506 JK |
250 | last_log_mask = qemu_str_to_log_mask(arg); |
251 | if (!last_log_mask) { | |
59a6fa6e | 252 | qemu_print_log_usage(stdout); |
4d1275c2 | 253 | exit(EXIT_FAILURE); |
fc9c5412 | 254 | } |
fc9c5412 JS |
255 | } |
256 | ||
8423fa90 AB |
257 | static void handle_arg_dfilter(const char *arg) |
258 | { | |
7f4341e8 | 259 | qemu_set_dfilter_ranges(arg, &error_fatal); |
8423fa90 AB |
260 | } |
261 | ||
50171d42 CWR |
262 | static void handle_arg_log_filename(const char *arg) |
263 | { | |
b410253f | 264 | last_log_filename = arg; |
50171d42 CWR |
265 | } |
266 | ||
fc9c5412 JS |
267 | static void handle_arg_set_env(const char *arg) |
268 | { | |
269 | char *r, *p, *token; | |
270 | r = p = strdup(arg); | |
271 | while ((token = strsep(&p, ",")) != NULL) { | |
272 | if (envlist_setenv(envlist, token) != 0) { | |
4d1275c2 | 273 | usage(EXIT_FAILURE); |
fc9c5412 JS |
274 | } |
275 | } | |
276 | free(r); | |
277 | } | |
278 | ||
279 | static void handle_arg_unset_env(const char *arg) | |
280 | { | |
281 | char *r, *p, *token; | |
282 | r = p = strdup(arg); | |
283 | while ((token = strsep(&p, ",")) != NULL) { | |
284 | if (envlist_unsetenv(envlist, token) != 0) { | |
4d1275c2 | 285 | usage(EXIT_FAILURE); |
fc9c5412 JS |
286 | } |
287 | } | |
288 | free(r); | |
289 | } | |
290 | ||
291 | static void handle_arg_argv0(const char *arg) | |
292 | { | |
293 | argv0 = strdup(arg); | |
294 | } | |
295 | ||
296 | static void handle_arg_stack_size(const char *arg) | |
297 | { | |
298 | char *p; | |
299 | guest_stack_size = strtoul(arg, &p, 0); | |
300 | if (guest_stack_size == 0) { | |
4d1275c2 | 301 | usage(EXIT_FAILURE); |
fc9c5412 JS |
302 | } |
303 | ||
304 | if (*p == 'M') { | |
b52713c1 | 305 | guest_stack_size *= MiB; |
fc9c5412 | 306 | } else if (*p == 'k' || *p == 'K') { |
b52713c1 | 307 | guest_stack_size *= KiB; |
fc9c5412 JS |
308 | } |
309 | } | |
310 | ||
311 | static void handle_arg_ld_prefix(const char *arg) | |
312 | { | |
313 | interp_prefix = strdup(arg); | |
314 | } | |
315 | ||
316 | static void handle_arg_pagesize(const char *arg) | |
317 | { | |
318 | qemu_host_page_size = atoi(arg); | |
319 | if (qemu_host_page_size == 0 || | |
320 | (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) { | |
321 | fprintf(stderr, "page size must be a power of two\n"); | |
4d1275c2 | 322 | exit(EXIT_FAILURE); |
fc9c5412 JS |
323 | } |
324 | } | |
325 | ||
5ebdd774 | 326 | static void handle_arg_seed(const char *arg) |
c5e4a5a9 | 327 | { |
5ebdd774 | 328 | seed_optarg = arg; |
c5e4a5a9 MR |
329 | } |
330 | ||
fc9c5412 JS |
331 | static void handle_arg_gdb(const char *arg) |
332 | { | |
fcedd920 | 333 | gdbstub = g_strdup(arg); |
fc9c5412 JS |
334 | } |
335 | ||
336 | static void handle_arg_uname(const char *arg) | |
337 | { | |
338 | qemu_uname_release = strdup(arg); | |
339 | } | |
340 | ||
341 | static void handle_arg_cpu(const char *arg) | |
342 | { | |
343 | cpu_model = strdup(arg); | |
c8057f95 | 344 | if (cpu_model == NULL || is_help_option(cpu_model)) { |
fc9c5412 | 345 | /* XXX: implement xxx_cpu_list for targets that still miss it */ |
e916cbf8 | 346 | #if defined(cpu_list) |
0442428a | 347 | cpu_list(); |
fc9c5412 | 348 | #endif |
4d1275c2 | 349 | exit(EXIT_FAILURE); |
fc9c5412 JS |
350 | } |
351 | } | |
352 | ||
fc9c5412 JS |
353 | static void handle_arg_guest_base(const char *arg) |
354 | { | |
355 | guest_base = strtol(arg, NULL, 0); | |
e307c192 | 356 | have_guest_base = true; |
fc9c5412 JS |
357 | } |
358 | ||
359 | static void handle_arg_reserved_va(const char *arg) | |
360 | { | |
361 | char *p; | |
362 | int shift = 0; | |
363 | reserved_va = strtoul(arg, &p, 0); | |
364 | switch (*p) { | |
365 | case 'k': | |
366 | case 'K': | |
367 | shift = 10; | |
368 | break; | |
369 | case 'M': | |
370 | shift = 20; | |
371 | break; | |
372 | case 'G': | |
373 | shift = 30; | |
374 | break; | |
375 | } | |
376 | if (shift) { | |
377 | unsigned long unshifted = reserved_va; | |
378 | p++; | |
379 | reserved_va <<= shift; | |
8f67b9c6 | 380 | if (reserved_va >> shift != unshifted) { |
fc9c5412 | 381 | fprintf(stderr, "Reserved virtual address too big\n"); |
4d1275c2 | 382 | exit(EXIT_FAILURE); |
fc9c5412 JS |
383 | } |
384 | } | |
385 | if (*p) { | |
386 | fprintf(stderr, "Unrecognised -R size suffix '%s'\n", p); | |
4d1275c2 | 387 | exit(EXIT_FAILURE); |
fc9c5412 JS |
388 | } |
389 | } | |
fc9c5412 JS |
390 | |
391 | static void handle_arg_singlestep(const char *arg) | |
392 | { | |
393 | singlestep = 1; | |
394 | } | |
395 | ||
396 | static void handle_arg_strace(const char *arg) | |
397 | { | |
4b25a506 | 398 | enable_strace = true; |
fc9c5412 JS |
399 | } |
400 | ||
401 | static void handle_arg_version(const char *arg) | |
402 | { | |
7e563bfb | 403 | printf("qemu-" TARGET_NAME " version " QEMU_FULL_VERSION |
0781dd6e | 404 | "\n" QEMU_COPYRIGHT "\n"); |
4d1275c2 | 405 | exit(EXIT_SUCCESS); |
fc9c5412 JS |
406 | } |
407 | ||
6533dd6e LV |
408 | static void handle_arg_trace(const char *arg) |
409 | { | |
92eecfff | 410 | trace_opt_parse(arg); |
6533dd6e LV |
411 | } |
412 | ||
130ea832 MF |
413 | #if defined(TARGET_XTENSA) |
414 | static void handle_arg_abi_call0(const char *arg) | |
415 | { | |
416 | xtensa_set_abi_call0(); | |
417 | } | |
418 | #endif | |
419 | ||
f308f64e LV |
420 | static QemuPluginList plugins = QTAILQ_HEAD_INITIALIZER(plugins); |
421 | ||
422 | #ifdef CONFIG_PLUGIN | |
423 | static void handle_arg_plugin(const char *arg) | |
424 | { | |
425 | qemu_plugin_opt_parse(arg, &plugins); | |
426 | } | |
427 | #endif | |
428 | ||
fc9c5412 JS |
429 | struct qemu_argument { |
430 | const char *argv; | |
431 | const char *env; | |
432 | bool has_arg; | |
433 | void (*handle_opt)(const char *arg); | |
434 | const char *example; | |
435 | const char *help; | |
436 | }; | |
437 | ||
42644cee | 438 | static const struct qemu_argument arg_table[] = { |
fc9c5412 JS |
439 | {"h", "", false, handle_arg_help, |
440 | "", "print this help"}, | |
daaf8c8e MI |
441 | {"help", "", false, handle_arg_help, |
442 | "", ""}, | |
fc9c5412 JS |
443 | {"g", "QEMU_GDB", true, handle_arg_gdb, |
444 | "port", "wait gdb connection to 'port'"}, | |
445 | {"L", "QEMU_LD_PREFIX", true, handle_arg_ld_prefix, | |
446 | "path", "set the elf interpreter prefix to 'path'"}, | |
447 | {"s", "QEMU_STACK_SIZE", true, handle_arg_stack_size, | |
448 | "size", "set the stack size to 'size' bytes"}, | |
449 | {"cpu", "QEMU_CPU", true, handle_arg_cpu, | |
c8057f95 | 450 | "model", "select CPU (-cpu help for list)"}, |
fc9c5412 JS |
451 | {"E", "QEMU_SET_ENV", true, handle_arg_set_env, |
452 | "var=value", "sets targets environment variable (see below)"}, | |
453 | {"U", "QEMU_UNSET_ENV", true, handle_arg_unset_env, | |
454 | "var", "unsets targets environment variable (see below)"}, | |
455 | {"0", "QEMU_ARGV0", true, handle_arg_argv0, | |
456 | "argv0", "forces target process argv[0] to be 'argv0'"}, | |
457 | {"r", "QEMU_UNAME", true, handle_arg_uname, | |
458 | "uname", "set qemu uname release string to 'uname'"}, | |
fc9c5412 JS |
459 | {"B", "QEMU_GUEST_BASE", true, handle_arg_guest_base, |
460 | "address", "set guest_base address to 'address'"}, | |
461 | {"R", "QEMU_RESERVED_VA", true, handle_arg_reserved_va, | |
462 | "size", "reserve 'size' bytes for guest virtual address space"}, | |
fc9c5412 | 463 | {"d", "QEMU_LOG", true, handle_arg_log, |
989b697d PM |
464 | "item[,...]", "enable logging of specified items " |
465 | "(use '-d help' for a list of items)"}, | |
8423fa90 AB |
466 | {"dfilter", "QEMU_DFILTER", true, handle_arg_dfilter, |
467 | "range[,...]","filter logging based on address range"}, | |
50171d42 | 468 | {"D", "QEMU_LOG_FILENAME", true, handle_arg_log_filename, |
989b697d | 469 | "logfile", "write logs to 'logfile' (default stderr)"}, |
fc9c5412 JS |
470 | {"p", "QEMU_PAGESIZE", true, handle_arg_pagesize, |
471 | "pagesize", "set the host page size to 'pagesize'"}, | |
472 | {"singlestep", "QEMU_SINGLESTEP", false, handle_arg_singlestep, | |
473 | "", "run in singlestep mode"}, | |
474 | {"strace", "QEMU_STRACE", false, handle_arg_strace, | |
475 | "", "log system calls"}, | |
5ebdd774 | 476 | {"seed", "QEMU_RAND_SEED", true, handle_arg_seed, |
c5e4a5a9 | 477 | "", "Seed for pseudo-random number generator"}, |
6533dd6e LV |
478 | {"trace", "QEMU_TRACE", true, handle_arg_trace, |
479 | "", "[[enable=]<pattern>][,events=<file>][,file=<file>]"}, | |
f308f64e LV |
480 | #ifdef CONFIG_PLUGIN |
481 | {"plugin", "QEMU_PLUGIN", true, handle_arg_plugin, | |
3a445acb | 482 | "", "[file=]<file>[,<argname>=<argvalue>]"}, |
f308f64e | 483 | #endif |
fc9c5412 | 484 | {"version", "QEMU_VERSION", false, handle_arg_version, |
1386d4c0 | 485 | "", "display version information and exit"}, |
130ea832 MF |
486 | #if defined(TARGET_XTENSA) |
487 | {"xtensa-abi-call0", "QEMU_XTENSA_ABI_CALL0", false, handle_arg_abi_call0, | |
488 | "", "assume CALL0 Xtensa ABI"}, | |
489 | #endif | |
fc9c5412 JS |
490 | {NULL, NULL, false, NULL, NULL, NULL} |
491 | }; | |
492 | ||
d03f9c32 | 493 | static void usage(int exitcode) |
fc9c5412 | 494 | { |
42644cee | 495 | const struct qemu_argument *arginfo; |
fc9c5412 JS |
496 | int maxarglen; |
497 | int maxenvlen; | |
498 | ||
2e59915d PB |
499 | printf("usage: qemu-" TARGET_NAME " [options] program [arguments...]\n" |
500 | "Linux CPU emulator (compiled for " TARGET_NAME " emulation)\n" | |
fc9c5412 JS |
501 | "\n" |
502 | "Options and associated environment variables:\n" | |
503 | "\n"); | |
504 | ||
63ec54d7 PM |
505 | /* Calculate column widths. We must always have at least enough space |
506 | * for the column header. | |
507 | */ | |
508 | maxarglen = strlen("Argument"); | |
509 | maxenvlen = strlen("Env-variable"); | |
fc9c5412 JS |
510 | |
511 | for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) { | |
63ec54d7 PM |
512 | int arglen = strlen(arginfo->argv); |
513 | if (arginfo->has_arg) { | |
514 | arglen += strlen(arginfo->example) + 1; | |
515 | } | |
fc9c5412 JS |
516 | if (strlen(arginfo->env) > maxenvlen) { |
517 | maxenvlen = strlen(arginfo->env); | |
518 | } | |
63ec54d7 PM |
519 | if (arglen > maxarglen) { |
520 | maxarglen = arglen; | |
fc9c5412 JS |
521 | } |
522 | } | |
523 | ||
63ec54d7 PM |
524 | printf("%-*s %-*s Description\n", maxarglen+1, "Argument", |
525 | maxenvlen, "Env-variable"); | |
fc9c5412 JS |
526 | |
527 | for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) { | |
528 | if (arginfo->has_arg) { | |
529 | printf("-%s %-*s %-*s %s\n", arginfo->argv, | |
63ec54d7 PM |
530 | (int)(maxarglen - strlen(arginfo->argv) - 1), |
531 | arginfo->example, maxenvlen, arginfo->env, arginfo->help); | |
fc9c5412 | 532 | } else { |
63ec54d7 | 533 | printf("-%-*s %-*s %s\n", maxarglen, arginfo->argv, |
fc9c5412 JS |
534 | maxenvlen, arginfo->env, |
535 | arginfo->help); | |
536 | } | |
537 | } | |
538 | ||
539 | printf("\n" | |
540 | "Defaults:\n" | |
541 | "QEMU_LD_PREFIX = %s\n" | |
989b697d | 542 | "QEMU_STACK_SIZE = %ld byte\n", |
fc9c5412 | 543 | interp_prefix, |
989b697d | 544 | guest_stack_size); |
fc9c5412 JS |
545 | |
546 | printf("\n" | |
547 | "You can use -E and -U options or the QEMU_SET_ENV and\n" | |
548 | "QEMU_UNSET_ENV environment variables to set and unset\n" | |
549 | "environment variables for the target process.\n" | |
550 | "It is possible to provide several variables by separating them\n" | |
551 | "by commas in getsubopt(3) style. Additionally it is possible to\n" | |
552 | "provide the -E and -U options multiple times.\n" | |
553 | "The following lines are equivalent:\n" | |
554 | " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n" | |
555 | " -E var1=val2,var2=val2 -U LD_PRELOAD,LD_DEBUG\n" | |
556 | " QEMU_SET_ENV=var1=val2,var2=val2 QEMU_UNSET_ENV=LD_PRELOAD,LD_DEBUG\n" | |
557 | "Note that if you provide several changes to a single variable\n" | |
f5048cb7 EB |
558 | "the last change will stay in effect.\n" |
559 | "\n" | |
560 | QEMU_HELP_BOTTOM "\n"); | |
fc9c5412 | 561 | |
d03f9c32 | 562 | exit(exitcode); |
fc9c5412 JS |
563 | } |
564 | ||
565 | static int parse_args(int argc, char **argv) | |
566 | { | |
567 | const char *r; | |
568 | int optind; | |
42644cee | 569 | const struct qemu_argument *arginfo; |
fc9c5412 JS |
570 | |
571 | for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) { | |
572 | if (arginfo->env == NULL) { | |
573 | continue; | |
574 | } | |
575 | ||
576 | r = getenv(arginfo->env); | |
577 | if (r != NULL) { | |
578 | arginfo->handle_opt(r); | |
579 | } | |
580 | } | |
581 | ||
582 | optind = 1; | |
583 | for (;;) { | |
584 | if (optind >= argc) { | |
585 | break; | |
586 | } | |
587 | r = argv[optind]; | |
588 | if (r[0] != '-') { | |
589 | break; | |
590 | } | |
591 | optind++; | |
592 | r++; | |
593 | if (!strcmp(r, "-")) { | |
594 | break; | |
595 | } | |
ba02577c MI |
596 | /* Treat --foo the same as -foo. */ |
597 | if (r[0] == '-') { | |
598 | r++; | |
599 | } | |
fc9c5412 JS |
600 | |
601 | for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) { | |
602 | if (!strcmp(r, arginfo->argv)) { | |
fc9c5412 | 603 | if (arginfo->has_arg) { |
1386d4c0 | 604 | if (optind >= argc) { |
138940bf MI |
605 | (void) fprintf(stderr, |
606 | "qemu: missing argument for option '%s'\n", r); | |
4d1275c2 | 607 | exit(EXIT_FAILURE); |
1386d4c0 PM |
608 | } |
609 | arginfo->handle_opt(argv[optind]); | |
fc9c5412 | 610 | optind++; |
1386d4c0 PM |
611 | } else { |
612 | arginfo->handle_opt(NULL); | |
fc9c5412 | 613 | } |
fc9c5412 JS |
614 | break; |
615 | } | |
616 | } | |
617 | ||
618 | /* no option matched the current argv */ | |
619 | if (arginfo->handle_opt == NULL) { | |
138940bf | 620 | (void) fprintf(stderr, "qemu: unknown option '%s'\n", r); |
4d1275c2 | 621 | exit(EXIT_FAILURE); |
fc9c5412 JS |
622 | } |
623 | } | |
624 | ||
625 | if (optind >= argc) { | |
138940bf | 626 | (void) fprintf(stderr, "qemu: no user program specified\n"); |
4d1275c2 | 627 | exit(EXIT_FAILURE); |
fc9c5412 JS |
628 | } |
629 | ||
fc9c5412 JS |
630 | exec_path = argv[optind]; |
631 | ||
632 | return optind; | |
633 | } | |
634 | ||
902b3d5c | 635 | int main(int argc, char **argv, char **envp) |
31e31b8a | 636 | { |
01ffc75b | 637 | struct target_pt_regs regs1, *regs = ®s1; |
31e31b8a | 638 | struct image_info info1, *info = &info1; |
edf8e2af | 639 | struct linux_binprm bprm; |
48e15fc2 | 640 | TaskState *ts; |
9349b4f9 | 641 | CPUArchState *env; |
db6b81d4 | 642 | CPUState *cpu; |
586314f2 | 643 | int optind; |
04a6dfeb | 644 | char **target_environ, **wrk; |
7d8cec95 AJ |
645 | char **target_argv; |
646 | int target_argc; | |
7d8cec95 | 647 | int i; |
fd4d81dd | 648 | int ret; |
03cfd8fa | 649 | int execfd; |
8f67b9c6 | 650 | unsigned long max_reserved_va; |
6e1c0d7b | 651 | bool preserve_argv0; |
b12b6a18 | 652 | |
f5852efa | 653 | error_init(argv[0]); |
fe4db84d | 654 | module_call_init(MODULE_INIT_TRACE); |
267f685b | 655 | qemu_init_cpu_list(); |
ce008c1f AF |
656 | module_call_init(MODULE_INIT_QOM); |
657 | ||
ec45bbe5 | 658 | envlist = envlist_create(); |
04a6dfeb AJ |
659 | |
660 | /* add current environment into the list */ | |
661 | for (wrk = environ; *wrk != NULL; wrk++) { | |
662 | (void) envlist_setenv(envlist, *wrk); | |
663 | } | |
664 | ||
703e0e89 RH |
665 | /* Read the stack limit from the kernel. If it's "unlimited", |
666 | then we can do little else besides use the default. */ | |
667 | { | |
668 | struct rlimit lim; | |
669 | if (getrlimit(RLIMIT_STACK, &lim) == 0 | |
81bbe906 TY |
670 | && lim.rlim_cur != RLIM_INFINITY |
671 | && lim.rlim_cur == (target_long)lim.rlim_cur) { | |
703e0e89 RH |
672 | guest_stack_size = lim.rlim_cur; |
673 | } | |
674 | } | |
675 | ||
b1f9be31 | 676 | cpu_model = NULL; |
b5ec5ce0 | 677 | |
6533dd6e | 678 | qemu_add_opts(&qemu_trace_opts); |
f308f64e | 679 | qemu_plugin_add_opts(); |
6533dd6e | 680 | |
fc9c5412 | 681 | optind = parse_args(argc, argv); |
586314f2 | 682 | |
b410253f RH |
683 | qemu_set_log_filename_flags(last_log_filename, |
684 | last_log_mask | (enable_strace * LOG_STRACE), | |
685 | &error_fatal); | |
4b25a506 | 686 | |
6533dd6e LV |
687 | if (!trace_init_backends()) { |
688 | exit(1); | |
689 | } | |
92eecfff | 690 | trace_init_file(); |
0572f558 | 691 | qemu_plugin_load_list(&plugins, &error_fatal); |
6533dd6e | 692 | |
31e31b8a | 693 | /* Zero out regs */ |
01ffc75b | 694 | memset(regs, 0, sizeof(struct target_pt_regs)); |
31e31b8a FB |
695 | |
696 | /* Zero out image_info */ | |
697 | memset(info, 0, sizeof(struct image_info)); | |
698 | ||
edf8e2af MW |
699 | memset(&bprm, 0, sizeof (bprm)); |
700 | ||
74cd30b8 FB |
701 | /* Scan interp_prefix dir for replacement files. */ |
702 | init_paths(interp_prefix); | |
703 | ||
4a24a758 PM |
704 | init_qemu_uname_release(); |
705 | ||
6e1c0d7b LV |
706 | /* |
707 | * Manage binfmt-misc open-binary flag | |
708 | */ | |
768fe76e YS |
709 | execfd = qemu_getauxval(AT_EXECFD); |
710 | if (execfd == 0) { | |
9d3019bc | 711 | execfd = open(exec_path, O_RDONLY); |
768fe76e | 712 | if (execfd < 0) { |
9d3019bc | 713 | printf("Error while loading %s: %s\n", exec_path, strerror(errno)); |
768fe76e YS |
714 | _exit(EXIT_FAILURE); |
715 | } | |
716 | } | |
717 | ||
6e1c0d7b LV |
718 | /* |
719 | * get binfmt_misc flags | |
720 | */ | |
721 | preserve_argv0 = !!(qemu_getauxval(AT_FLAGS) & AT_FLAGS_PRESERVE_ARGV0); | |
722 | ||
723 | /* | |
724 | * Manage binfmt-misc preserve-arg[0] flag | |
725 | * argv[optind] full path to the binary | |
726 | * argv[optind + 1] original argv[0] | |
727 | */ | |
728 | if (optind + 1 < argc && preserve_argv0) { | |
729 | optind++; | |
730 | } | |
731 | ||
46027c07 | 732 | if (cpu_model == NULL) { |
768fe76e | 733 | cpu_model = cpu_get_model(get_elf_eflags(execfd)); |
aaed909a | 734 | } |
c1c8cfe5 | 735 | cpu_type = parse_cpu_option(cpu_model); |
2278b939 | 736 | |
2b5249b8 | 737 | /* init tcg before creating CPUs and to get qemu_host_page_size */ |
940e43aa CF |
738 | { |
739 | AccelClass *ac = ACCEL_GET_CLASS(current_accel()); | |
2278b939 | 740 | |
b86f59c7 | 741 | accel_init_interfaces(ac); |
92242f34 | 742 | ac->init_machine(NULL); |
940e43aa | 743 | } |
2278b939 | 744 | cpu = cpu_create(cpu_type); |
2994fd96 | 745 | env = cpu->env_ptr; |
0ac46af3 | 746 | cpu_reset(cpu); |
db6b81d4 | 747 | thread_cpu = cpu; |
3b46e624 | 748 | |
8f67b9c6 RH |
749 | /* |
750 | * Reserving too much vm space via mmap can run into problems | |
751 | * with rlimits, oom due to page table creation, etc. We will | |
752 | * still try it, if directed by the command-line option, but | |
753 | * not by default. | |
754 | */ | |
755 | max_reserved_va = MAX_RESERVED_VA(cpu); | |
756 | if (reserved_va != 0) { | |
757 | if (max_reserved_va && reserved_va > max_reserved_va) { | |
758 | fprintf(stderr, "Reserved virtual address too big\n"); | |
759 | exit(EXIT_FAILURE); | |
760 | } | |
761 | } else if (HOST_LONG_BITS == 64 && TARGET_VIRT_ADDR_SPACE_BITS <= 32) { | |
762 | /* | |
763 | * reserved_va must be aligned with the host page size | |
764 | * as it is used with mmap() | |
765 | */ | |
766 | reserved_va = max_reserved_va & qemu_host_page_mask; | |
767 | } | |
768 | ||
a573e9ba RH |
769 | { |
770 | Error *err = NULL; | |
771 | if (seed_optarg != NULL) { | |
a573e9ba RH |
772 | qemu_guest_random_seed_main(seed_optarg, &err); |
773 | } else { | |
774 | qcrypto_init(&err); | |
775 | } | |
776 | if (err) { | |
777 | error_reportf_err(err, "cannot initialize crypto: "); | |
778 | exit(1); | |
5ebdd774 | 779 | } |
c5e4a5a9 MR |
780 | } |
781 | ||
04a6dfeb AJ |
782 | target_environ = envlist_to_environ(envlist, NULL); |
783 | envlist_free(envlist); | |
b12b6a18 | 784 | |
379f6698 PB |
785 | /* |
786 | * Read in mmap_min_addr kernel parameter. This value is used | |
787 | * When loading the ELF image to determine whether guest_base | |
14f24e14 | 788 | * is needed. It is also used in mmap_find_vma. |
379f6698 | 789 | */ |
14f24e14 | 790 | { |
379f6698 PB |
791 | FILE *fp; |
792 | ||
793 | if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) { | |
794 | unsigned long tmp; | |
c9f80666 | 795 | if (fscanf(fp, "%lu", &tmp) == 1 && tmp != 0) { |
379f6698 | 796 | mmap_min_addr = tmp; |
c9f80666 RH |
797 | qemu_log_mask(CPU_LOG_PAGE, "host mmap_min_addr=0x%lx\n", |
798 | mmap_min_addr); | |
379f6698 PB |
799 | } |
800 | fclose(fp); | |
801 | } | |
802 | } | |
379f6698 | 803 | |
c9f80666 RH |
804 | /* |
805 | * We prefer to not make NULL pointers accessible to QEMU. | |
806 | * If we're in a chroot with no /proc, fall back to 1 page. | |
807 | */ | |
808 | if (mmap_min_addr == 0) { | |
809 | mmap_min_addr = qemu_host_page_size; | |
810 | qemu_log_mask(CPU_LOG_PAGE, | |
811 | "host mmap_min_addr=0x%lx (fallback)\n", | |
812 | mmap_min_addr); | |
813 | } | |
814 | ||
7d8cec95 AJ |
815 | /* |
816 | * Prepare copy of argv vector for target. | |
817 | */ | |
818 | target_argc = argc - optind; | |
819 | target_argv = calloc(target_argc + 1, sizeof (char *)); | |
820 | if (target_argv == NULL) { | |
7d37435b PB |
821 | (void) fprintf(stderr, "Unable to allocate memory for target_argv\n"); |
822 | exit(EXIT_FAILURE); | |
7d8cec95 AJ |
823 | } |
824 | ||
825 | /* | |
826 | * If argv0 is specified (using '-0' switch) we replace | |
827 | * argv[0] pointer with the given one. | |
828 | */ | |
829 | i = 0; | |
830 | if (argv0 != NULL) { | |
831 | target_argv[i++] = strdup(argv0); | |
832 | } | |
833 | for (; i < target_argc; i++) { | |
834 | target_argv[i] = strdup(argv[optind + i]); | |
835 | } | |
836 | target_argv[target_argc] = NULL; | |
837 | ||
c78d65e8 | 838 | ts = g_new0(TaskState, 1); |
edf8e2af MW |
839 | init_task_state(ts); |
840 | /* build Task State */ | |
841 | ts->info = info; | |
842 | ts->bprm = &bprm; | |
0429a971 | 843 | cpu->opaque = ts; |
edf8e2af MW |
844 | task_settid(ts); |
845 | ||
c093364f OA |
846 | fd_trans_init(); |
847 | ||
9d3019bc | 848 | ret = loader_exec(execfd, exec_path, target_argv, target_environ, regs, |
fd4d81dd AP |
849 | info, &bprm); |
850 | if (ret != 0) { | |
9d3019bc | 851 | printf("Error while loading %s: %s\n", exec_path, strerror(-ret)); |
4d1275c2 | 852 | _exit(EXIT_FAILURE); |
b12b6a18 TS |
853 | } |
854 | ||
855 | for (wrk = target_environ; *wrk; wrk++) { | |
ec45bbe5 | 856 | g_free(*wrk); |
31e31b8a | 857 | } |
3b46e624 | 858 | |
ec45bbe5 | 859 | g_free(target_environ); |
b12b6a18 | 860 | |
13829020 | 861 | if (qemu_loglevel_mask(CPU_LOG_PAGE)) { |
93756fdc RH |
862 | FILE *f = qemu_log_trylock(); |
863 | if (f) { | |
864 | fprintf(f, "guest_base %p\n", (void *)guest_base); | |
865 | fprintf(f, "page layout changed following binary load\n"); | |
866 | page_dump(f); | |
867 | ||
868 | fprintf(f, "start_brk 0x" TARGET_ABI_FMT_lx "\n", | |
869 | info->start_brk); | |
870 | fprintf(f, "end_code 0x" TARGET_ABI_FMT_lx "\n", | |
871 | info->end_code); | |
872 | fprintf(f, "start_code 0x" TARGET_ABI_FMT_lx "\n", | |
873 | info->start_code); | |
874 | fprintf(f, "start_data 0x" TARGET_ABI_FMT_lx "\n", | |
875 | info->start_data); | |
876 | fprintf(f, "end_data 0x" TARGET_ABI_FMT_lx "\n", | |
877 | info->end_data); | |
878 | fprintf(f, "start_stack 0x" TARGET_ABI_FMT_lx "\n", | |
879 | info->start_stack); | |
880 | fprintf(f, "brk 0x" TARGET_ABI_FMT_lx "\n", | |
881 | info->brk); | |
882 | fprintf(f, "entry 0x" TARGET_ABI_FMT_lx "\n", | |
883 | info->entry); | |
884 | fprintf(f, "argv_start 0x" TARGET_ABI_FMT_lx "\n", | |
60f1c801 | 885 | info->argv); |
93756fdc | 886 | fprintf(f, "env_start 0x" TARGET_ABI_FMT_lx "\n", |
60f1c801 | 887 | info->envp); |
93756fdc RH |
888 | fprintf(f, "auxv_start 0x" TARGET_ABI_FMT_lx "\n", |
889 | info->saved_auxv); | |
890 | qemu_log_unlock(f); | |
891 | } | |
2e77eac6 | 892 | } |
31e31b8a | 893 | |
53a5960a | 894 | target_set_brk(info->brk); |
31e31b8a | 895 | syscall_init(); |
66fb9763 | 896 | signal_init(); |
31e31b8a | 897 | |
9002ec79 RH |
898 | /* Now that we've loaded the binary, GUEST_BASE is fixed. Delay |
899 | generating the prologue until now so that the prologue can take | |
900 | the real value of GUEST_BASE into account. */ | |
b1311c4a | 901 | tcg_prologue_init(tcg_ctx); |
9002ec79 | 902 | |
cd71c089 LV |
903 | target_cpu_copy_regs(env, regs); |
904 | ||
fcedd920 AB |
905 | if (gdbstub) { |
906 | if (gdbserver_start(gdbstub) < 0) { | |
907 | fprintf(stderr, "qemu: could not open gdbserver on %s\n", | |
908 | gdbstub); | |
4d1275c2 | 909 | exit(EXIT_FAILURE); |
ff7a981a | 910 | } |
db6b81d4 | 911 | gdb_handlesig(cpu, 0); |
1fddef4b | 912 | } |
e4a4aaa5 RH |
913 | |
914 | #ifdef CONFIG_SEMIHOSTING | |
915 | qemu_semihosting_guestfd_init(); | |
916 | #endif | |
917 | ||
1b6b029e FB |
918 | cpu_loop(env); |
919 | /* never exits */ | |
31e31b8a FB |
920 | return 0; |
921 | } |