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