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1 | /* |
2 | * qemu user main | |
3 | * | |
4 | * Copyright (c) 2003-2008 Fabrice Bellard | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | */ | |
20 | #include <stdlib.h> | |
21 | #include <stdio.h> | |
22 | #include <stdarg.h> | |
23 | #include <string.h> | |
24 | #include <errno.h> | |
25 | #include <unistd.h> | |
26 | #include <machine/trap.h> | |
27 | ||
28 | #include "qemu.h" | |
29 | #include "qemu-common.h" | |
30 | /* For tb_lock */ | |
31 | #include "exec-all.h" | |
32 | ||
33 | #define DEBUG_LOGFILE "/tmp/qemu.log" | |
34 | ||
35 | static const char *interp_prefix = CONFIG_QEMU_PREFIX; | |
36 | const char *qemu_uname_release = CONFIG_UNAME_RELEASE; | |
37 | extern char **environ; | |
38 | ||
39 | /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so | |
40 | we allocate a bigger stack. Need a better solution, for example | |
41 | by remapping the process stack directly at the right place */ | |
42 | unsigned long x86_stack_size = 512 * 1024; | |
43 | ||
44 | void gemu_log(const char *fmt, ...) | |
45 | { | |
46 | va_list ap; | |
47 | ||
48 | va_start(ap, fmt); | |
49 | vfprintf(stderr, fmt, ap); | |
50 | va_end(ap); | |
51 | } | |
52 | #ifdef TARGET_SPARC | |
53 | #define SPARC64_STACK_BIAS 2047 | |
54 | ||
55 | //#define DEBUG_WIN | |
56 | /* WARNING: dealing with register windows _is_ complicated. More info | |
57 | can be found at http://www.sics.se/~psm/sparcstack.html */ | |
58 | static inline int get_reg_index(CPUSPARCState *env, int cwp, int index) | |
59 | { | |
60 | index = (index + cwp * 16) % (16 * env->nwindows); | |
61 | /* wrap handling : if cwp is on the last window, then we use the | |
62 | registers 'after' the end */ | |
63 | if (index < 8 && env->cwp == env->nwindows - 1) | |
64 | index += 16 * env->nwindows; | |
65 | return index; | |
66 | } | |
67 | ||
68 | /* save the register window 'cwp1' */ | |
69 | static inline void save_window_offset(CPUSPARCState *env, int cwp1) | |
70 | { | |
71 | unsigned int i; | |
72 | abi_ulong sp_ptr; | |
73 | ||
74 | sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)]; | |
75 | #ifdef TARGET_SPARC64 | |
76 | if (sp_ptr & 3) | |
77 | sp_ptr += SPARC64_STACK_BIAS; | |
78 | #endif | |
79 | #if defined(DEBUG_WIN) | |
80 | printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n", | |
81 | sp_ptr, cwp1); | |
82 | #endif | |
83 | for(i = 0; i < 16; i++) { | |
84 | /* FIXME - what to do if put_user() fails? */ | |
85 | put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr); | |
86 | sp_ptr += sizeof(abi_ulong); | |
87 | } | |
88 | } | |
89 | ||
90 | static void save_window(CPUSPARCState *env) | |
91 | { | |
92 | #ifndef TARGET_SPARC64 | |
93 | unsigned int new_wim; | |
94 | new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) & | |
95 | ((1LL << env->nwindows) - 1); | |
96 | save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2)); | |
97 | env->wim = new_wim; | |
98 | #else | |
99 | save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2)); | |
100 | env->cansave++; | |
101 | env->canrestore--; | |
102 | #endif | |
103 | } | |
104 | ||
105 | static void restore_window(CPUSPARCState *env) | |
106 | { | |
107 | #ifndef TARGET_SPARC64 | |
108 | unsigned int new_wim; | |
109 | #endif | |
110 | unsigned int i, cwp1; | |
111 | abi_ulong sp_ptr; | |
112 | ||
113 | #ifndef TARGET_SPARC64 | |
114 | new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) & | |
115 | ((1LL << env->nwindows) - 1); | |
116 | #endif | |
117 | ||
118 | /* restore the invalid window */ | |
119 | cwp1 = cpu_cwp_inc(env, env->cwp + 1); | |
120 | sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)]; | |
121 | #ifdef TARGET_SPARC64 | |
122 | if (sp_ptr & 3) | |
123 | sp_ptr += SPARC64_STACK_BIAS; | |
124 | #endif | |
125 | #if defined(DEBUG_WIN) | |
126 | printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n", | |
127 | sp_ptr, cwp1); | |
128 | #endif | |
129 | for(i = 0; i < 16; i++) { | |
130 | /* FIXME - what to do if get_user() fails? */ | |
131 | get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr); | |
132 | sp_ptr += sizeof(abi_ulong); | |
133 | } | |
134 | #ifdef TARGET_SPARC64 | |
135 | env->canrestore++; | |
136 | if (env->cleanwin < env->nwindows - 1) | |
137 | env->cleanwin++; | |
138 | env->cansave--; | |
139 | #else | |
140 | env->wim = new_wim; | |
141 | #endif | |
142 | } | |
143 | ||
144 | static void flush_windows(CPUSPARCState *env) | |
145 | { | |
146 | int offset, cwp1; | |
147 | ||
148 | offset = 1; | |
149 | for(;;) { | |
150 | /* if restore would invoke restore_window(), then we can stop */ | |
151 | cwp1 = cpu_cwp_inc(env, env->cwp + offset); | |
152 | #ifndef TARGET_SPARC64 | |
153 | if (env->wim & (1 << cwp1)) | |
154 | break; | |
155 | #else | |
156 | if (env->canrestore == 0) | |
157 | break; | |
158 | env->cansave++; | |
159 | env->canrestore--; | |
160 | #endif | |
161 | save_window_offset(env, cwp1); | |
162 | offset++; | |
163 | } | |
164 | cwp1 = cpu_cwp_inc(env, env->cwp + 1); | |
165 | #ifndef TARGET_SPARC64 | |
166 | /* set wim so that restore will reload the registers */ | |
167 | env->wim = 1 << cwp1; | |
168 | #endif | |
169 | #if defined(DEBUG_WIN) | |
170 | printf("flush_windows: nb=%d\n", offset - 1); | |
171 | #endif | |
172 | } | |
173 | ||
174 | void cpu_loop(CPUSPARCState *env, enum BSDType bsd_type) | |
175 | { | |
176 | int trapnr, ret, syscall_nr; | |
177 | //target_siginfo_t info; | |
178 | ||
179 | while (1) { | |
180 | trapnr = cpu_sparc_exec (env); | |
181 | ||
182 | switch (trapnr) { | |
183 | case 0x100: | |
184 | syscall_nr = env->gregs[1]; | |
185 | #if defined(TARGET_SPARC) | |
186 | syscall_nr &= ~(SYSCALL_G7RFLAG | SYSCALL_G2RFLAG); | |
187 | #endif | |
188 | if (bsd_type == target_freebsd) | |
189 | ret = do_freebsd_syscall(env, syscall_nr, | |
190 | env->regwptr[0], env->regwptr[1], | |
191 | env->regwptr[2], env->regwptr[3], | |
192 | env->regwptr[4], env->regwptr[5]); | |
193 | else if (bsd_type == target_netbsd) | |
194 | ret = do_netbsd_syscall(env, syscall_nr, | |
195 | env->regwptr[0], env->regwptr[1], | |
196 | env->regwptr[2], env->regwptr[3], | |
197 | env->regwptr[4], env->regwptr[5]); | |
198 | else //if (bsd_type == target_openbsd) | |
199 | ret = do_openbsd_syscall(env, syscall_nr, | |
200 | env->regwptr[0], env->regwptr[1], | |
201 | env->regwptr[2], env->regwptr[3], | |
202 | env->regwptr[4], env->regwptr[5]); | |
203 | if ((unsigned int)ret >= (unsigned int)(-515)) { | |
204 | #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) | |
205 | env->xcc |= PSR_CARRY; | |
206 | #else | |
207 | env->psr |= PSR_CARRY; | |
208 | #endif | |
209 | } else { | |
210 | #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32) | |
211 | env->xcc &= ~PSR_CARRY; | |
212 | #else | |
213 | env->psr &= ~PSR_CARRY; | |
214 | #endif | |
215 | } | |
216 | env->regwptr[0] = ret; | |
217 | /* next instruction */ | |
218 | #if defined(TARGET_SPARC) | |
219 | if (env->gregs[1] & SYSCALL_G2RFLAG) { | |
220 | env->pc = env->gregs[2]; | |
221 | env->npc = env->pc + 4; | |
222 | } else if (env->gregs[1] & SYSCALL_G7RFLAG) { | |
223 | env->pc = env->gregs[7]; | |
224 | env->npc = env->pc + 4; | |
225 | } else { | |
226 | env->pc = env->npc; | |
227 | env->npc = env->npc + 4; | |
228 | } | |
229 | #else | |
230 | env->pc = env->npc; | |
231 | env->npc = env->npc + 4; | |
232 | #endif | |
233 | break; | |
234 | case 0x83: /* flush windows */ | |
235 | #ifdef TARGET_ABI32 | |
236 | case 0x103: | |
237 | #endif | |
238 | flush_windows(env); | |
239 | /* next instruction */ | |
240 | env->pc = env->npc; | |
241 | env->npc = env->npc + 4; | |
242 | break; | |
243 | #ifndef TARGET_SPARC64 | |
244 | case TT_WIN_OVF: /* window overflow */ | |
245 | save_window(env); | |
246 | break; | |
247 | case TT_WIN_UNF: /* window underflow */ | |
248 | restore_window(env); | |
249 | break; | |
250 | case TT_TFAULT: | |
251 | case TT_DFAULT: | |
252 | #if 0 | |
253 | { | |
254 | info.si_signo = SIGSEGV; | |
255 | info.si_errno = 0; | |
256 | /* XXX: check env->error_code */ | |
257 | info.si_code = TARGET_SEGV_MAPERR; | |
258 | info._sifields._sigfault._addr = env->mmuregs[4]; | |
259 | queue_signal(env, info.si_signo, &info); | |
260 | } | |
261 | #endif | |
262 | break; | |
263 | #else | |
264 | case TT_SPILL: /* window overflow */ | |
265 | save_window(env); | |
266 | break; | |
267 | case TT_FILL: /* window underflow */ | |
268 | restore_window(env); | |
269 | break; | |
270 | case TT_TFAULT: | |
271 | case TT_DFAULT: | |
272 | #if 0 | |
273 | { | |
274 | info.si_signo = SIGSEGV; | |
275 | info.si_errno = 0; | |
276 | /* XXX: check env->error_code */ | |
277 | info.si_code = TARGET_SEGV_MAPERR; | |
278 | if (trapnr == TT_DFAULT) | |
279 | info._sifields._sigfault._addr = env->dmmuregs[4]; | |
280 | else | |
281 | info._sifields._sigfault._addr = env->tsptr->tpc; | |
282 | //queue_signal(env, info.si_signo, &info); | |
283 | } | |
284 | #endif | |
285 | break; | |
286 | #endif | |
287 | case EXCP_INTERRUPT: | |
288 | /* just indicate that signals should be handled asap */ | |
289 | break; | |
290 | case EXCP_DEBUG: | |
291 | { | |
292 | int sig; | |
293 | ||
294 | sig = gdb_handlesig (env, TARGET_SIGTRAP); | |
295 | #if 0 | |
296 | if (sig) | |
297 | { | |
298 | info.si_signo = sig; | |
299 | info.si_errno = 0; | |
300 | info.si_code = TARGET_TRAP_BRKPT; | |
301 | //queue_signal(env, info.si_signo, &info); | |
302 | } | |
303 | #endif | |
304 | } | |
305 | break; | |
306 | default: | |
307 | printf ("Unhandled trap: 0x%x\n", trapnr); | |
308 | cpu_dump_state(env, stderr, fprintf, 0); | |
309 | exit (1); | |
310 | } | |
311 | process_pending_signals (env); | |
312 | } | |
313 | } | |
314 | ||
315 | #endif | |
316 | ||
317 | static void usage(void) | |
318 | { | |
319 | printf("qemu-" TARGET_ARCH " version " QEMU_VERSION ", Copyright (c) 2003-2008 Fabrice Bellard\n" | |
320 | "usage: qemu-" TARGET_ARCH " [options] program [arguments...]\n" | |
321 | "BSD CPU emulator (compiled for %s emulation)\n" | |
322 | "\n" | |
323 | "Standard options:\n" | |
324 | "-h print this help\n" | |
325 | "-g port wait gdb connection to port\n" | |
326 | "-L path set the elf interpreter prefix (default=%s)\n" | |
327 | "-s size set the stack size in bytes (default=%ld)\n" | |
328 | "-cpu model select CPU (-cpu ? for list)\n" | |
329 | "-drop-ld-preload drop LD_PRELOAD for target process\n" | |
330 | "-bsd type select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n" | |
331 | "\n" | |
332 | "Debug options:\n" | |
333 | "-d options activate log (logfile=%s)\n" | |
334 | "-p pagesize set the host page size to 'pagesize'\n" | |
335 | "-strace log system calls\n" | |
336 | "\n" | |
337 | "Environment variables:\n" | |
338 | "QEMU_STRACE Print system calls and arguments similar to the\n" | |
339 | " 'strace' program. Enable by setting to any value.\n" | |
340 | , | |
341 | TARGET_ARCH, | |
342 | interp_prefix, | |
343 | x86_stack_size, | |
344 | DEBUG_LOGFILE); | |
345 | _exit(1); | |
346 | } | |
347 | ||
348 | THREAD CPUState *thread_env; | |
349 | ||
350 | /* Assumes contents are already zeroed. */ | |
351 | void init_task_state(TaskState *ts) | |
352 | { | |
353 | int i; | |
354 | ||
355 | ts->used = 1; | |
356 | ts->first_free = ts->sigqueue_table; | |
357 | for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) { | |
358 | ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1]; | |
359 | } | |
360 | ts->sigqueue_table[i].next = NULL; | |
361 | } | |
362 | ||
363 | int main(int argc, char **argv) | |
364 | { | |
365 | const char *filename; | |
366 | const char *cpu_model; | |
367 | struct target_pt_regs regs1, *regs = ®s1; | |
368 | struct image_info info1, *info = &info1; | |
369 | TaskState ts1, *ts = &ts1; | |
370 | CPUState *env; | |
371 | int optind; | |
372 | const char *r; | |
373 | int gdbstub_port = 0; | |
374 | int drop_ld_preload = 0, environ_count = 0; | |
375 | char **target_environ, **wrk, **dst; | |
376 | enum BSDType bsd_type = target_openbsd; | |
377 | ||
378 | if (argc <= 1) | |
379 | usage(); | |
380 | ||
381 | /* init debug */ | |
382 | cpu_set_log_filename(DEBUG_LOGFILE); | |
383 | ||
384 | cpu_model = NULL; | |
385 | optind = 1; | |
386 | for(;;) { | |
387 | if (optind >= argc) | |
388 | break; | |
389 | r = argv[optind]; | |
390 | if (r[0] != '-') | |
391 | break; | |
392 | optind++; | |
393 | r++; | |
394 | if (!strcmp(r, "-")) { | |
395 | break; | |
396 | } else if (!strcmp(r, "d")) { | |
397 | int mask; | |
398 | const CPULogItem *item; | |
399 | ||
400 | if (optind >= argc) | |
401 | break; | |
402 | ||
403 | r = argv[optind++]; | |
404 | mask = cpu_str_to_log_mask(r); | |
405 | if (!mask) { | |
406 | printf("Log items (comma separated):\n"); | |
407 | for(item = cpu_log_items; item->mask != 0; item++) { | |
408 | printf("%-10s %s\n", item->name, item->help); | |
409 | } | |
410 | exit(1); | |
411 | } | |
412 | cpu_set_log(mask); | |
413 | } else if (!strcmp(r, "s")) { | |
414 | r = argv[optind++]; | |
415 | x86_stack_size = strtol(r, (char **)&r, 0); | |
416 | if (x86_stack_size <= 0) | |
417 | usage(); | |
418 | if (*r == 'M') | |
419 | x86_stack_size *= 1024 * 1024; | |
420 | else if (*r == 'k' || *r == 'K') | |
421 | x86_stack_size *= 1024; | |
422 | } else if (!strcmp(r, "L")) { | |
423 | interp_prefix = argv[optind++]; | |
424 | } else if (!strcmp(r, "p")) { | |
425 | qemu_host_page_size = atoi(argv[optind++]); | |
426 | if (qemu_host_page_size == 0 || | |
427 | (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) { | |
428 | fprintf(stderr, "page size must be a power of two\n"); | |
429 | exit(1); | |
430 | } | |
431 | } else if (!strcmp(r, "g")) { | |
432 | gdbstub_port = atoi(argv[optind++]); | |
433 | } else if (!strcmp(r, "r")) { | |
434 | qemu_uname_release = argv[optind++]; | |
435 | } else if (!strcmp(r, "cpu")) { | |
436 | cpu_model = argv[optind++]; | |
437 | if (strcmp(cpu_model, "?") == 0) { | |
438 | /* XXX: implement xxx_cpu_list for targets that still miss it */ | |
439 | #if defined(cpu_list) | |
440 | cpu_list(stdout, &fprintf); | |
441 | #endif | |
442 | _exit(1); | |
443 | } | |
444 | } else if (!strcmp(r, "drop-ld-preload")) { | |
445 | drop_ld_preload = 1; | |
446 | } else if (!strcmp(r, "bsd")) { | |
447 | if (!strcasecmp(argv[optind], "freebsd")) { | |
448 | bsd_type = target_freebsd; | |
449 | } else if (!strcasecmp(argv[optind], "netbsd")) { | |
450 | bsd_type = target_netbsd; | |
451 | } else if (!strcasecmp(argv[optind], "openbsd")) { | |
452 | bsd_type = target_openbsd; | |
453 | } else { | |
454 | usage(); | |
455 | } | |
456 | optind++; | |
457 | } else if (!strcmp(r, "strace")) { | |
458 | do_strace = 1; | |
459 | } else | |
460 | { | |
461 | usage(); | |
462 | } | |
463 | } | |
464 | if (optind >= argc) | |
465 | usage(); | |
466 | filename = argv[optind]; | |
467 | ||
468 | /* Zero out regs */ | |
469 | memset(regs, 0, sizeof(struct target_pt_regs)); | |
470 | ||
471 | /* Zero out image_info */ | |
472 | memset(info, 0, sizeof(struct image_info)); | |
473 | ||
474 | /* Scan interp_prefix dir for replacement files. */ | |
475 | init_paths(interp_prefix); | |
476 | ||
477 | if (cpu_model == NULL) { | |
478 | #if defined(TARGET_SPARC) | |
479 | #ifdef TARGET_SPARC64 | |
480 | cpu_model = "TI UltraSparc II"; | |
481 | #else | |
482 | cpu_model = "Fujitsu MB86904"; | |
483 | #endif | |
484 | #else | |
485 | cpu_model = "any"; | |
486 | #endif | |
487 | } | |
488 | cpu_exec_init_all(0); | |
489 | /* NOTE: we need to init the CPU at this stage to get | |
490 | qemu_host_page_size */ | |
491 | env = cpu_init(cpu_model); | |
492 | if (!env) { | |
493 | fprintf(stderr, "Unable to find CPU definition\n"); | |
494 | exit(1); | |
495 | } | |
496 | thread_env = env; | |
497 | ||
498 | if (getenv("QEMU_STRACE")) { | |
499 | do_strace = 1; | |
500 | } | |
501 | ||
502 | wrk = environ; | |
503 | while (*(wrk++)) | |
504 | environ_count++; | |
505 | ||
506 | target_environ = malloc((environ_count + 1) * sizeof(char *)); | |
507 | if (!target_environ) | |
508 | abort(); | |
509 | for (wrk = environ, dst = target_environ; *wrk; wrk++) { | |
510 | if (drop_ld_preload && !strncmp(*wrk, "LD_PRELOAD=", 11)) | |
511 | continue; | |
512 | *(dst++) = strdup(*wrk); | |
513 | } | |
514 | *dst = NULL; /* NULL terminate target_environ */ | |
515 | ||
516 | if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) { | |
517 | printf("Error loading %s\n", filename); | |
518 | _exit(1); | |
519 | } | |
520 | ||
521 | for (wrk = target_environ; *wrk; wrk++) { | |
522 | free(*wrk); | |
523 | } | |
524 | ||
525 | free(target_environ); | |
526 | ||
527 | if (loglevel) { | |
528 | page_dump(logfile); | |
529 | ||
530 | fprintf(logfile, "start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk); | |
531 | fprintf(logfile, "end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code); | |
532 | fprintf(logfile, "start_code 0x" TARGET_ABI_FMT_lx "\n", | |
533 | info->start_code); | |
534 | fprintf(logfile, "start_data 0x" TARGET_ABI_FMT_lx "\n", | |
535 | info->start_data); | |
536 | fprintf(logfile, "end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data); | |
537 | fprintf(logfile, "start_stack 0x" TARGET_ABI_FMT_lx "\n", | |
538 | info->start_stack); | |
539 | fprintf(logfile, "brk 0x" TARGET_ABI_FMT_lx "\n", info->brk); | |
540 | fprintf(logfile, "entry 0x" TARGET_ABI_FMT_lx "\n", info->entry); | |
541 | } | |
542 | ||
543 | target_set_brk(info->brk); | |
544 | syscall_init(); | |
545 | signal_init(); | |
546 | ||
547 | /* build Task State */ | |
548 | memset(ts, 0, sizeof(TaskState)); | |
549 | init_task_state(ts); | |
550 | ts->info = info; | |
551 | env->opaque = ts; | |
552 | env->user_mode_only = 1; | |
553 | ||
554 | #if defined(TARGET_SPARC) | |
555 | { | |
556 | int i; | |
557 | env->pc = regs->pc; | |
558 | env->npc = regs->npc; | |
559 | env->y = regs->y; | |
560 | for(i = 0; i < 8; i++) | |
561 | env->gregs[i] = regs->u_regs[i]; | |
562 | for(i = 0; i < 8; i++) | |
563 | env->regwptr[i] = regs->u_regs[i + 8]; | |
564 | } | |
565 | #else | |
566 | #error unsupported target CPU | |
567 | #endif | |
568 | ||
569 | if (gdbstub_port) { | |
570 | gdbserver_start (gdbstub_port); | |
571 | gdb_handlesig(env, 0); | |
572 | } | |
573 | cpu_loop(env, bsd_type); | |
574 | /* never exits */ | |
575 | return 0; | |
576 | } |