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block: fix deadlock in bdrv_co_flush
[qemu/kevin.git] / bsd-user / main.c
blobb4a0a00c3fd1bff48f7b23e816f3f4a9583c47c3
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, see <http://www.gnu.org/licenses/>.
18 */
19 #include "qemu/osdep.h"
20 #include <machine/trap.h>
21
22 #include "qapi/error.h"
23 #include "qemu.h"
24 #include "qemu/config-file.h"
25 #include "qemu/path.h"
26 #include "qemu/help_option.h"
27 /* For tb_lock */
28 #include "cpu.h"
29 #include "exec/exec-all.h"
30 #include "tcg.h"
31 #include "qemu/timer.h"
32 #include "qemu/envlist.h"
33 #include "exec/log.h"
34 #include "trace/control.h"
35 #include "glib-compat.h"
36
37 int singlestep;
38 unsigned long mmap_min_addr;
39 unsigned long guest_base;
40 int have_guest_base;
41 unsigned long reserved_va;
42
43 static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX;
44 const char *qemu_uname_release;
45 extern char **environ;
46 enum BSDType bsd_type;
47
48 /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
49 we allocate a bigger stack. Need a better solution, for example
50 by remapping the process stack directly at the right place */
51 unsigned long x86_stack_size = 512 * 1024;
52
53 void gemu_log(const char *fmt, ...)
54 {
55 va_list ap;
56
57 va_start(ap, fmt);
58 vfprintf(stderr, fmt, ap);
59 va_end(ap);
60 }
61
62 #if defined(TARGET_I386)
63 int cpu_get_pic_interrupt(CPUX86State *env)
64 {
65 return -1;
66 }
67 #endif
68
69 /* These are no-ops because we are not threadsafe. */
70 static inline void cpu_exec_start(CPUArchState *env)
71 {
72 }
73
74 static inline void cpu_exec_end(CPUArchState *env)
75 {
76 }
77
78 static inline void start_exclusive(void)
79 {
80 }
81
82 static inline void end_exclusive(void)
83 {
84 }
85
86 void fork_start(void)
87 {
88 }
89
90 void fork_end(int child)
91 {
92 if (child) {
93 gdbserver_fork(thread_cpu);
94 }
95 }
96
97 void cpu_list_lock(void)
98 {
99 }
100
101 void cpu_list_unlock(void)
102 {
103 }
104
105 #ifdef TARGET_I386
106 /***********************************************************/
107 /* CPUX86 core interface */
108
109 uint64_t cpu_get_tsc(CPUX86State *env)
110 {
111 return cpu_get_host_ticks();
112 }
113
114 static void write_dt(void *ptr, unsigned long addr, unsigned long limit,
115 int flags)
116 {
117 unsigned int e1, e2;
118 uint32_t *p;
119 e1 = (addr << 16) | (limit & 0xffff);
120 e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
121 e2 |= flags;
122 p = ptr;
123 p[0] = tswap32(e1);
124 p[1] = tswap32(e2);
125 }
126
127 static uint64_t *idt_table;
128 #ifdef TARGET_X86_64
129 static void set_gate64(void *ptr, unsigned int type, unsigned int dpl,
130 uint64_t addr, unsigned int sel)
131 {
132 uint32_t *p, e1, e2;
133 e1 = (addr & 0xffff) | (sel << 16);
134 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
135 p = ptr;
136 p[0] = tswap32(e1);
137 p[1] = tswap32(e2);
138 p[2] = tswap32(addr >> 32);
139 p[3] = 0;
140 }
141 /* only dpl matters as we do only user space emulation */
142 static void set_idt(int n, unsigned int dpl)
143 {
144 set_gate64(idt_table + n * 2, 0, dpl, 0, 0);
145 }
146 #else
147 static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
148 uint32_t addr, unsigned int sel)
149 {
150 uint32_t *p, e1, e2;
151 e1 = (addr & 0xffff) | (sel << 16);
152 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
153 p = ptr;
154 p[0] = tswap32(e1);
155 p[1] = tswap32(e2);
156 }
157
158 /* only dpl matters as we do only user space emulation */
159 static void set_idt(int n, unsigned int dpl)
160 {
161 set_gate(idt_table + n, 0, dpl, 0, 0);
162 }
163 #endif
164
165 void cpu_loop(CPUX86State *env)
166 {
167 X86CPU *cpu = x86_env_get_cpu(env);
168 CPUState *cs = CPU(cpu);
169 int trapnr;
170 abi_ulong pc;
171 //target_siginfo_t info;
172
173 for(;;) {
174 trapnr = cpu_exec(cs);
175 switch(trapnr) {
176 case 0x80:
177 /* syscall from int $0x80 */
178 if (bsd_type == target_freebsd) {
179 abi_ulong params = (abi_ulong) env->regs[R_ESP] +
180 sizeof(int32_t);
181 int32_t syscall_nr = env->regs[R_EAX];
182 int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8;
183
184 if (syscall_nr == TARGET_FREEBSD_NR_syscall) {
185 get_user_s32(syscall_nr, params);
186 params += sizeof(int32_t);
187 } else if (syscall_nr == TARGET_FREEBSD_NR___syscall) {
188 get_user_s32(syscall_nr, params);
189 params += sizeof(int64_t);
190 }
191 get_user_s32(arg1, params);
192 params += sizeof(int32_t);
193 get_user_s32(arg2, params);
194 params += sizeof(int32_t);
195 get_user_s32(arg3, params);
196 params += sizeof(int32_t);
197 get_user_s32(arg4, params);
198 params += sizeof(int32_t);
199 get_user_s32(arg5, params);
200 params += sizeof(int32_t);
201 get_user_s32(arg6, params);
202 params += sizeof(int32_t);
203 get_user_s32(arg7, params);
204 params += sizeof(int32_t);
205 get_user_s32(arg8, params);
206 env->regs[R_EAX] = do_freebsd_syscall(env,
207 syscall_nr,
208 arg1,
209 arg2,
210 arg3,
211 arg4,
212 arg5,
213 arg6,
214 arg7,
215 arg8);
216 } else { //if (bsd_type == target_openbsd)
217 env->regs[R_EAX] = do_openbsd_syscall(env,
218 env->regs[R_EAX],
219 env->regs[R_EBX],
220 env->regs[R_ECX],
221 env->regs[R_EDX],
222 env->regs[R_ESI],
223 env->regs[R_EDI],
224 env->regs[R_EBP]);
225 }
226 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) {
227 env->regs[R_EAX] = -env->regs[R_EAX];
228 env->eflags |= CC_C;
229 } else {
230 env->eflags &= ~CC_C;
231 }
232 break;
233 #ifndef TARGET_ABI32
234 case EXCP_SYSCALL:
235 /* syscall from syscall instruction */
236 if (bsd_type == target_freebsd)
237 env->regs[R_EAX] = do_freebsd_syscall(env,
238 env->regs[R_EAX],
239 env->regs[R_EDI],
240 env->regs[R_ESI],
241 env->regs[R_EDX],
242 env->regs[R_ECX],
243 env->regs[8],
244 env->regs[9], 0, 0);
245 else { //if (bsd_type == target_openbsd)
246 env->regs[R_EAX] = do_openbsd_syscall(env,
247 env->regs[R_EAX],
248 env->regs[R_EDI],
249 env->regs[R_ESI],
250 env->regs[R_EDX],
251 env->regs[10],
252 env->regs[8],
253 env->regs[9]);
254 }
255 env->eip = env->exception_next_eip;
256 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) {
257 env->regs[R_EAX] = -env->regs[R_EAX];
258 env->eflags |= CC_C;
259 } else {
260 env->eflags &= ~CC_C;
261 }
262 break;
263 #endif
264 #if 0
265 case EXCP0B_NOSEG:
266 case EXCP0C_STACK:
267 info.si_signo = SIGBUS;
268 info.si_errno = 0;
269 info.si_code = TARGET_SI_KERNEL;
270 info._sifields._sigfault._addr = 0;
271 queue_signal(env, info.si_signo, &info);
272 break;
273 case EXCP0D_GPF:
274 /* XXX: potential problem if ABI32 */
275 #ifndef TARGET_X86_64
276 if (env->eflags & VM_MASK) {
277 handle_vm86_fault(env);
278 } else
279 #endif
280 {
281 info.si_signo = SIGSEGV;
282 info.si_errno = 0;
283 info.si_code = TARGET_SI_KERNEL;
284 info._sifields._sigfault._addr = 0;
285 queue_signal(env, info.si_signo, &info);
286 }
287 break;
288 case EXCP0E_PAGE:
289 info.si_signo = SIGSEGV;
290 info.si_errno = 0;
291 if (!(env->error_code & 1))
292 info.si_code = TARGET_SEGV_MAPERR;
293 else
294 info.si_code = TARGET_SEGV_ACCERR;
295 info._sifields._sigfault._addr = env->cr[2];
296 queue_signal(env, info.si_signo, &info);
297 break;
298 case EXCP00_DIVZ:
299 #ifndef TARGET_X86_64
300 if (env->eflags & VM_MASK) {
301 handle_vm86_trap(env, trapnr);
302 } else
303 #endif
304 {
305 /* division by zero */
306 info.si_signo = SIGFPE;
307 info.si_errno = 0;
308 info.si_code = TARGET_FPE_INTDIV;
309 info._sifields._sigfault._addr = env->eip;
310 queue_signal(env, info.si_signo, &info);
311 }
312 break;
313 case EXCP01_DB:
314 case EXCP03_INT3:
315 #ifndef TARGET_X86_64
316 if (env->eflags & VM_MASK) {
317 handle_vm86_trap(env, trapnr);
318 } else
319 #endif
320 {
321 info.si_signo = SIGTRAP;
322 info.si_errno = 0;
323 if (trapnr == EXCP01_DB) {
324 info.si_code = TARGET_TRAP_BRKPT;
325 info._sifields._sigfault._addr = env->eip;
326 } else {
327 info.si_code = TARGET_SI_KERNEL;
328 info._sifields._sigfault._addr = 0;
329 }
330 queue_signal(env, info.si_signo, &info);
331 }
332 break;
333 case EXCP04_INTO:
334 case EXCP05_BOUND:
335 #ifndef TARGET_X86_64
336 if (env->eflags & VM_MASK) {
337 handle_vm86_trap(env, trapnr);
338 } else
339 #endif
340 {
341 info.si_signo = SIGSEGV;
342 info.si_errno = 0;
343 info.si_code = TARGET_SI_KERNEL;
344 info._sifields._sigfault._addr = 0;
345 queue_signal(env, info.si_signo, &info);
346 }
347 break;
348 case EXCP06_ILLOP:
349 info.si_signo = SIGILL;
350 info.si_errno = 0;
351 info.si_code = TARGET_ILL_ILLOPN;
352 info._sifields._sigfault._addr = env->eip;
353 queue_signal(env, info.si_signo, &info);
354 break;
355 #endif
356 case EXCP_INTERRUPT:
357 /* just indicate that signals should be handled asap */
358 break;
359 #if 0
360 case EXCP_DEBUG:
361 {
362 int sig;
363
364 sig = gdb_handlesig (env, TARGET_SIGTRAP);
365 if (sig)
366 {
367 info.si_signo = sig;
368 info.si_errno = 0;
369 info.si_code = TARGET_TRAP_BRKPT;
370 queue_signal(env, info.si_signo, &info);
371 }
372 }
373 break;
374 #endif
375 default:
376 pc = env->segs[R_CS].base + env->eip;
377 fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
378 (long)pc, trapnr);
379 abort();
380 }
381 process_pending_signals(env);
382 }
383 }
384 #endif
385
386 #ifdef TARGET_SPARC
387 #define SPARC64_STACK_BIAS 2047
388
389 //#define DEBUG_WIN
390 /* WARNING: dealing with register windows _is_ complicated. More info
391 can be found at http://www.sics.se/~psm/sparcstack.html */
392 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index)
393 {
394 index = (index + cwp * 16) % (16 * env->nwindows);
395 /* wrap handling : if cwp is on the last window, then we use the
396 registers 'after' the end */
397 if (index < 8 && env->cwp == env->nwindows - 1)
398 index += 16 * env->nwindows;
399 return index;
400 }
401
402 /* save the register window 'cwp1' */
403 static inline void save_window_offset(CPUSPARCState *env, int cwp1)
404 {
405 unsigned int i;
406 abi_ulong sp_ptr;
407
408 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
409 #ifdef TARGET_SPARC64
410 if (sp_ptr & 3)
411 sp_ptr += SPARC64_STACK_BIAS;
412 #endif
413 #if defined(DEBUG_WIN)
414 printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n",
415 sp_ptr, cwp1);
416 #endif
417 for(i = 0; i < 16; i++) {
418 /* FIXME - what to do if put_user() fails? */
419 put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
420 sp_ptr += sizeof(abi_ulong);
421 }
422 }
423
424 static void save_window(CPUSPARCState *env)
425 {
426 #ifndef TARGET_SPARC64
427 unsigned int new_wim;
428 new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) &
429 ((1LL << env->nwindows) - 1);
430 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
431 env->wim = new_wim;
432 #else
433 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
434 env->cansave++;
435 env->canrestore--;
436 #endif
437 }
438
439 static void restore_window(CPUSPARCState *env)
440 {
441 #ifndef TARGET_SPARC64
442 unsigned int new_wim;
443 #endif
444 unsigned int i, cwp1;
445 abi_ulong sp_ptr;
446
447 #ifndef TARGET_SPARC64
448 new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) &
449 ((1LL << env->nwindows) - 1);
450 #endif
451
452 /* restore the invalid window */
453 cwp1 = cpu_cwp_inc(env, env->cwp + 1);
454 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
455 #ifdef TARGET_SPARC64
456 if (sp_ptr & 3)
457 sp_ptr += SPARC64_STACK_BIAS;
458 #endif
459 #if defined(DEBUG_WIN)
460 printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n",
461 sp_ptr, cwp1);
462 #endif
463 for(i = 0; i < 16; i++) {
464 /* FIXME - what to do if get_user() fails? */
465 get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
466 sp_ptr += sizeof(abi_ulong);
467 }
468 #ifdef TARGET_SPARC64
469 env->canrestore++;
470 if (env->cleanwin < env->nwindows - 1)
471 env->cleanwin++;
472 env->cansave--;
473 #else
474 env->wim = new_wim;
475 #endif
476 }
477
478 static void flush_windows(CPUSPARCState *env)
479 {
480 int offset, cwp1;
481
482 offset = 1;
483 for(;;) {
484 /* if restore would invoke restore_window(), then we can stop */
485 cwp1 = cpu_cwp_inc(env, env->cwp + offset);
486 #ifndef TARGET_SPARC64
487 if (env->wim & (1 << cwp1))
488 break;
489 #else
490 if (env->canrestore == 0)
491 break;
492 env->cansave++;
493 env->canrestore--;
494 #endif
495 save_window_offset(env, cwp1);
496 offset++;
497 }
498 cwp1 = cpu_cwp_inc(env, env->cwp + 1);
499 #ifndef TARGET_SPARC64
500 /* set wim so that restore will reload the registers */
501 env->wim = 1 << cwp1;
502 #endif
503 #if defined(DEBUG_WIN)
504 printf("flush_windows: nb=%d\n", offset - 1);
505 #endif
506 }
507
508 void cpu_loop(CPUSPARCState *env)
509 {
510 CPUState *cs = CPU(sparc_env_get_cpu(env));
511 int trapnr, ret, syscall_nr;
512 //target_siginfo_t info;
513
514 while (1) {
515 trapnr = cpu_exec(cs);
516
517 switch (trapnr) {
518 #ifndef TARGET_SPARC64
519 case 0x80:
520 #else
521 /* FreeBSD uses 0x141 for syscalls too */
522 case 0x141:
523 if (bsd_type != target_freebsd)
524 goto badtrap;
525 case 0x100:
526 #endif
527 syscall_nr = env->gregs[1];
528 if (bsd_type == target_freebsd)
529 ret = do_freebsd_syscall(env, syscall_nr,
530 env->regwptr[0], env->regwptr[1],
531 env->regwptr[2], env->regwptr[3],
532 env->regwptr[4], env->regwptr[5], 0, 0);
533 else if (bsd_type == target_netbsd)
534 ret = do_netbsd_syscall(env, syscall_nr,
535 env->regwptr[0], env->regwptr[1],
536 env->regwptr[2], env->regwptr[3],
537 env->regwptr[4], env->regwptr[5]);
538 else { //if (bsd_type == target_openbsd)
539 #if defined(TARGET_SPARC64)
540 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG |
541 TARGET_OPENBSD_SYSCALL_G2RFLAG);
542 #endif
543 ret = do_openbsd_syscall(env, syscall_nr,
544 env->regwptr[0], env->regwptr[1],
545 env->regwptr[2], env->regwptr[3],
546 env->regwptr[4], env->regwptr[5]);
547 }
548 if ((unsigned int)ret >= (unsigned int)(-515)) {
549 ret = -ret;
550 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
551 env->xcc |= PSR_CARRY;
552 #else
553 env->psr |= PSR_CARRY;
554 #endif
555 } else {
556 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
557 env->xcc &= ~PSR_CARRY;
558 #else
559 env->psr &= ~PSR_CARRY;
560 #endif
561 }
562 env->regwptr[0] = ret;
563 /* next instruction */
564 #if defined(TARGET_SPARC64)
565 if (bsd_type == target_openbsd &&
566 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) {
567 env->pc = env->gregs[2];
568 env->npc = env->pc + 4;
569 } else if (bsd_type == target_openbsd &&
570 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) {
571 env->pc = env->gregs[7];
572 env->npc = env->pc + 4;
573 } else {
574 env->pc = env->npc;
575 env->npc = env->npc + 4;
576 }
577 #else
578 env->pc = env->npc;
579 env->npc = env->npc + 4;
580 #endif
581 break;
582 case 0x83: /* flush windows */
583 #ifdef TARGET_ABI32
584 case 0x103:
585 #endif
586 flush_windows(env);
587 /* next instruction */
588 env->pc = env->npc;
589 env->npc = env->npc + 4;
590 break;
591 #ifndef TARGET_SPARC64
592 case TT_WIN_OVF: /* window overflow */
593 save_window(env);
594 break;
595 case TT_WIN_UNF: /* window underflow */
596 restore_window(env);
597 break;
598 case TT_TFAULT:
599 case TT_DFAULT:
600 #if 0
601 {
602 info.si_signo = SIGSEGV;
603 info.si_errno = 0;
604 /* XXX: check env->error_code */
605 info.si_code = TARGET_SEGV_MAPERR;
606 info._sifields._sigfault._addr = env->mmuregs[4];
607 queue_signal(env, info.si_signo, &info);
608 }
609 #endif
610 break;
611 #else
612 case TT_SPILL: /* window overflow */
613 save_window(env);
614 break;
615 case TT_FILL: /* window underflow */
616 restore_window(env);
617 break;
618 case TT_TFAULT:
619 case TT_DFAULT:
620 #if 0
621 {
622 info.si_signo = SIGSEGV;
623 info.si_errno = 0;
624 /* XXX: check env->error_code */
625 info.si_code = TARGET_SEGV_MAPERR;
626 if (trapnr == TT_DFAULT)
627 info._sifields._sigfault._addr = env->dmmuregs[4];
628 else
629 info._sifields._sigfault._addr = env->tsptr->tpc;
630 //queue_signal(env, info.si_signo, &info);
631 }
632 #endif
633 break;
634 #endif
635 case EXCP_INTERRUPT:
636 /* just indicate that signals should be handled asap */
637 break;
638 case EXCP_DEBUG:
639 {
640 int sig;
641
642 sig = gdb_handlesig(cs, TARGET_SIGTRAP);
643 #if 0
644 if (sig)
645 {
646 info.si_signo = sig;
647 info.si_errno = 0;
648 info.si_code = TARGET_TRAP_BRKPT;
649 //queue_signal(env, info.si_signo, &info);
650 }
651 #endif
652 }
653 break;
654 default:
655 #ifdef TARGET_SPARC64
656 badtrap:
657 #endif
658 printf ("Unhandled trap: 0x%x\n", trapnr);
659 cpu_dump_state(cs, stderr, fprintf, 0);
660 exit (1);
661 }
662 process_pending_signals (env);
663 }
664 }
665
666 #endif
667
668 static void usage(void)
669 {
670 printf("qemu-" TARGET_NAME " version " QEMU_VERSION QEMU_PKGVERSION
671 ", " QEMU_COPYRIGHT "\n"
672 "usage: qemu-" TARGET_NAME " [options] program [arguments...]\n"
673 "BSD CPU emulator (compiled for %s emulation)\n"
674 "\n"
675 "Standard options:\n"
676 "-h print this help\n"
677 "-g port wait gdb connection to port\n"
678 "-L path set the elf interpreter prefix (default=%s)\n"
679 "-s size set the stack size in bytes (default=%ld)\n"
680 "-cpu model select CPU (-cpu help for list)\n"
681 "-drop-ld-preload drop LD_PRELOAD for target process\n"
682 "-E var=value sets/modifies targets environment variable(s)\n"
683 "-U var unsets targets environment variable(s)\n"
684 "-B address set guest_base address to address\n"
685 "-bsd type select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n"
686 "\n"
687 "Debug options:\n"
688 "-d item1[,...] enable logging of specified items\n"
689 " (use '-d help' for a list of log items)\n"
690 "-D logfile write logs to 'logfile' (default stderr)\n"
691 "-p pagesize set the host page size to 'pagesize'\n"
692 "-singlestep always run in singlestep mode\n"
693 "-strace log system calls\n"
694 "-trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n"
695 " specify tracing options\n"
696 "\n"
697 "Environment variables:\n"
698 "QEMU_STRACE Print system calls and arguments similar to the\n"
699 " 'strace' program. Enable by setting to any value.\n"
700 "You can use -E and -U options to set/unset environment variables\n"
701 "for target process. It is possible to provide several variables\n"
702 "by repeating the option. For example:\n"
703 " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n"
704 "Note that if you provide several changes to single variable\n"
705 "last change will stay in effect.\n"
706 ,
707 TARGET_NAME,
708 interp_prefix,
709 x86_stack_size);
710 exit(1);
711 }
712
713 THREAD CPUState *thread_cpu;
714
715 /* Assumes contents are already zeroed. */
716 void init_task_state(TaskState *ts)
717 {
718 int i;
719
720 ts->used = 1;
721 ts->first_free = ts->sigqueue_table;
722 for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) {
723 ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1];
724 }
725 ts->sigqueue_table[i].next = NULL;
726 }
727
728 int main(int argc, char **argv)
729 {
730 const char *filename;
731 const char *cpu_model;
732 const char *log_file = NULL;
733 const char *log_mask = NULL;
734 struct target_pt_regs regs1, *regs = &regs1;
735 struct image_info info1, *info = &info1;
736 TaskState ts1, *ts = &ts1;
737 CPUArchState *env;
738 CPUState *cpu;
739 int optind;
740 const char *r;
741 int gdbstub_port = 0;
742 char **target_environ, **wrk;
743 envlist_t *envlist = NULL;
744 char *trace_file = NULL;
745 bsd_type = target_openbsd;
746
747 if (argc <= 1)
748 usage();
749
750 module_call_init(MODULE_INIT_QOM);
751
752 if ((envlist = envlist_create()) == NULL) {
753 (void) fprintf(stderr, "Unable to allocate envlist\n");
754 exit(1);
755 }
756
757 /* add current environment into the list */
758 for (wrk = environ; *wrk != NULL; wrk++) {
759 (void) envlist_setenv(envlist, *wrk);
760 }
761
762 cpu_model = NULL;
763
764 qemu_add_opts(&qemu_trace_opts);
765
766 optind = 1;
767 for (;;) {
768 if (optind >= argc)
769 break;
770 r = argv[optind];
771 if (r[0] != '-')
772 break;
773 optind++;
774 r++;
775 if (!strcmp(r, "-")) {
776 break;
777 } else if (!strcmp(r, "d")) {
778 if (optind >= argc) {
779 break;
780 }
781 log_mask = argv[optind++];
782 } else if (!strcmp(r, "D")) {
783 if (optind >= argc) {
784 break;
785 }
786 log_file = argv[optind++];
787 } else if (!strcmp(r, "E")) {
788 r = argv[optind++];
789 if (envlist_setenv(envlist, r) != 0)
790 usage();
791 } else if (!strcmp(r, "ignore-environment")) {
792 envlist_free(envlist);
793 if ((envlist = envlist_create()) == NULL) {
794 (void) fprintf(stderr, "Unable to allocate envlist\n");
795 exit(1);
796 }
797 } else if (!strcmp(r, "U")) {
798 r = argv[optind++];
799 if (envlist_unsetenv(envlist, r) != 0)
800 usage();
801 } else if (!strcmp(r, "s")) {
802 r = argv[optind++];
803 x86_stack_size = strtol(r, (char **)&r, 0);
804 if (x86_stack_size <= 0)
805 usage();
806 if (*r == 'M')
807 x86_stack_size *= 1024 * 1024;
808 else if (*r == 'k' || *r == 'K')
809 x86_stack_size *= 1024;
810 } else if (!strcmp(r, "L")) {
811 interp_prefix = argv[optind++];
812 } else if (!strcmp(r, "p")) {
813 qemu_host_page_size = atoi(argv[optind++]);
814 if (qemu_host_page_size == 0 ||
815 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
816 fprintf(stderr, "page size must be a power of two\n");
817 exit(1);
818 }
819 } else if (!strcmp(r, "g")) {
820 gdbstub_port = atoi(argv[optind++]);
821 } else if (!strcmp(r, "r")) {
822 qemu_uname_release = argv[optind++];
823 } else if (!strcmp(r, "cpu")) {
824 cpu_model = argv[optind++];
825 if (is_help_option(cpu_model)) {
826 /* XXX: implement xxx_cpu_list for targets that still miss it */
827 #if defined(cpu_list)
828 cpu_list(stdout, &fprintf);
829 #endif
830 exit(1);
831 }
832 } else if (!strcmp(r, "B")) {
833 guest_base = strtol(argv[optind++], NULL, 0);
834 have_guest_base = 1;
835 } else if (!strcmp(r, "drop-ld-preload")) {
836 (void) envlist_unsetenv(envlist, "LD_PRELOAD");
837 } else if (!strcmp(r, "bsd")) {
838 if (!strcasecmp(argv[optind], "freebsd")) {
839 bsd_type = target_freebsd;
840 } else if (!strcasecmp(argv[optind], "netbsd")) {
841 bsd_type = target_netbsd;
842 } else if (!strcasecmp(argv[optind], "openbsd")) {
843 bsd_type = target_openbsd;
844 } else {
845 usage();
846 }
847 optind++;
848 } else if (!strcmp(r, "singlestep")) {
849 singlestep = 1;
850 } else if (!strcmp(r, "strace")) {
851 do_strace = 1;
852 } else if (!strcmp(r, "trace")) {
853 g_free(trace_file);
854 trace_file = trace_opt_parse(optarg);
855 } else {
856 usage();
857 }
858 }
859
860 /* init debug */
861 qemu_log_needs_buffers();
862 qemu_set_log_filename(log_file, &error_fatal);
863 if (log_mask) {
864 int mask;
865
866 mask = qemu_str_to_log_mask(log_mask);
867 if (!mask) {
868 qemu_print_log_usage(stdout);
869 exit(1);
870 }
871 qemu_set_log(mask);
872 }
873
874 if (optind >= argc) {
875 usage();
876 }
877 filename = argv[optind];
878
879 if (!trace_init_backends()) {
880 exit(1);
881 }
882 trace_init_file(trace_file);
883
884 /* Zero out regs */
885 memset(regs, 0, sizeof(struct target_pt_regs));
886
887 /* Zero out image_info */
888 memset(info, 0, sizeof(struct image_info));
889
890 /* Scan interp_prefix dir for replacement files. */
891 init_paths(interp_prefix);
892
893 if (cpu_model == NULL) {
894 #if defined(TARGET_I386)
895 #ifdef TARGET_X86_64
896 cpu_model = "qemu64";
897 #else
898 cpu_model = "qemu32";
899 #endif
900 #elif defined(TARGET_SPARC)
901 #ifdef TARGET_SPARC64
902 cpu_model = "TI UltraSparc II";
903 #else
904 cpu_model = "Fujitsu MB86904";
905 #endif
906 #else
907 cpu_model = "any";
908 #endif
909 }
910 tcg_exec_init(0);
911 /* NOTE: we need to init the CPU at this stage to get
912 qemu_host_page_size */
913 cpu = cpu_init(cpu_model);
914 if (!cpu) {
915 fprintf(stderr, "Unable to find CPU definition\n");
916 exit(1);
917 }
918 env = cpu->env_ptr;
919 #if defined(TARGET_SPARC) || defined(TARGET_PPC)
920 cpu_reset(cpu);
921 #endif
922 thread_cpu = cpu;
923
924 if (getenv("QEMU_STRACE")) {
925 do_strace = 1;
926 }
927
928 target_environ = envlist_to_environ(envlist, NULL);
929 envlist_free(envlist);
930
931 /*
932 * Now that page sizes are configured in cpu_init() we can do
933 * proper page alignment for guest_base.
934 */
935 guest_base = HOST_PAGE_ALIGN(guest_base);
936
937 /*
938 * Read in mmap_min_addr kernel parameter. This value is used
939 * When loading the ELF image to determine whether guest_base
940 * is needed.
941 *
942 * When user has explicitly set the quest base, we skip this
943 * test.
944 */
945 if (!have_guest_base) {
946 FILE *fp;
947
948 if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) {
949 unsigned long tmp;
950 if (fscanf(fp, "%lu", &tmp) == 1) {
951 mmap_min_addr = tmp;
952 qemu_log_mask(CPU_LOG_PAGE, "host mmap_min_addr=0x%lx\n", mmap_min_addr);
953 }
954 fclose(fp);
955 }
956 }
957
958 if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) {
959 printf("Error loading %s\n", filename);
960 _exit(1);
961 }
962
963 for (wrk = target_environ; *wrk; wrk++) {
964 free(*wrk);
965 }
966
967 free(target_environ);
968
969 if (qemu_loglevel_mask(CPU_LOG_PAGE)) {
970 qemu_log("guest_base 0x%lx\n", guest_base);
971 log_page_dump();
972
973 qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk);
974 qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code);
975 qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n",
976 info->start_code);
977 qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n",
978 info->start_data);
979 qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data);
980 qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n",
981 info->start_stack);
982 qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk);
983 qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry);
984 }
985
986 target_set_brk(info->brk);
987 syscall_init();
988 signal_init();
989
990 /* Now that we've loaded the binary, GUEST_BASE is fixed. Delay
991 generating the prologue until now so that the prologue can take
992 the real value of GUEST_BASE into account. */
993 tcg_prologue_init(&tcg_ctx);
994
995 /* build Task State */
996 memset(ts, 0, sizeof(TaskState));
997 init_task_state(ts);
998 ts->info = info;
999 cpu->opaque = ts;
1000
1001 #if defined(TARGET_I386)
1002 env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
1003 env->hflags |= HF_PE_MASK | HF_CPL_MASK;
1004 if (env->features[FEAT_1_EDX] & CPUID_SSE) {
1005 env->cr[4] |= CR4_OSFXSR_MASK;
1006 env->hflags |= HF_OSFXSR_MASK;
1007 }
1008 #ifndef TARGET_ABI32
1009 /* enable 64 bit mode if possible */
1010 if (!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM)) {
1011 fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n");
1012 exit(1);
1013 }
1014 env->cr[4] |= CR4_PAE_MASK;
1015 env->efer |= MSR_EFER_LMA | MSR_EFER_LME;
1016 env->hflags |= HF_LMA_MASK;
1017 #endif
1018
1019 /* flags setup : we activate the IRQs by default as in user mode */
1020 env->eflags |= IF_MASK;
1021
1022 /* linux register setup */
1023 #ifndef TARGET_ABI32
1024 env->regs[R_EAX] = regs->rax;
1025 env->regs[R_EBX] = regs->rbx;
1026 env->regs[R_ECX] = regs->rcx;
1027 env->regs[R_EDX] = regs->rdx;
1028 env->regs[R_ESI] = regs->rsi;
1029 env->regs[R_EDI] = regs->rdi;
1030 env->regs[R_EBP] = regs->rbp;
1031 env->regs[R_ESP] = regs->rsp;
1032 env->eip = regs->rip;
1033 #else
1034 env->regs[R_EAX] = regs->eax;
1035 env->regs[R_EBX] = regs->ebx;
1036 env->regs[R_ECX] = regs->ecx;
1037 env->regs[R_EDX] = regs->edx;
1038 env->regs[R_ESI] = regs->esi;
1039 env->regs[R_EDI] = regs->edi;
1040 env->regs[R_EBP] = regs->ebp;
1041 env->regs[R_ESP] = regs->esp;
1042 env->eip = regs->eip;
1043 #endif
1044
1045 /* linux interrupt setup */
1046 #ifndef TARGET_ABI32
1047 env->idt.limit = 511;
1048 #else
1049 env->idt.limit = 255;
1050 #endif
1051 env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1),
1052 PROT_READ|PROT_WRITE,
1053 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1054 idt_table = g2h(env->idt.base);
1055 set_idt(0, 0);
1056 set_idt(1, 0);
1057 set_idt(2, 0);
1058 set_idt(3, 3);
1059 set_idt(4, 3);
1060 set_idt(5, 0);
1061 set_idt(6, 0);
1062 set_idt(7, 0);
1063 set_idt(8, 0);
1064 set_idt(9, 0);
1065 set_idt(10, 0);
1066 set_idt(11, 0);
1067 set_idt(12, 0);
1068 set_idt(13, 0);
1069 set_idt(14, 0);
1070 set_idt(15, 0);
1071 set_idt(16, 0);
1072 set_idt(17, 0);
1073 set_idt(18, 0);
1074 set_idt(19, 0);
1075 set_idt(0x80, 3);
1076
1077 /* linux segment setup */
1078 {
1079 uint64_t *gdt_table;
1080 env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES,
1081 PROT_READ|PROT_WRITE,
1082 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1083 env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1;
1084 gdt_table = g2h(env->gdt.base);
1085 #ifdef TARGET_ABI32
1086 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1087 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1088 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1089 #else
1090 /* 64 bit code segment */
1091 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1092 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1093 DESC_L_MASK |
1094 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1095 #endif
1096 write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff,
1097 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1098 (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
1099 }
1100
1101 cpu_x86_load_seg(env, R_CS, __USER_CS);
1102 cpu_x86_load_seg(env, R_SS, __USER_DS);
1103 #ifdef TARGET_ABI32
1104 cpu_x86_load_seg(env, R_DS, __USER_DS);
1105 cpu_x86_load_seg(env, R_ES, __USER_DS);
1106 cpu_x86_load_seg(env, R_FS, __USER_DS);
1107 cpu_x86_load_seg(env, R_GS, __USER_DS);
1108 /* This hack makes Wine work... */
1109 env->segs[R_FS].selector = 0;
1110 #else
1111 cpu_x86_load_seg(env, R_DS, 0);
1112 cpu_x86_load_seg(env, R_ES, 0);
1113 cpu_x86_load_seg(env, R_FS, 0);
1114 cpu_x86_load_seg(env, R_GS, 0);
1115 #endif
1116 #elif defined(TARGET_SPARC)
1117 {
1118 int i;
1119 env->pc = regs->pc;
1120 env->npc = regs->npc;
1121 env->y = regs->y;
1122 for(i = 0; i < 8; i++)
1123 env->gregs[i] = regs->u_regs[i];
1124 for(i = 0; i < 8; i++)
1125 env->regwptr[i] = regs->u_regs[i + 8];
1126 }
1127 #else
1128 #error unsupported target CPU
1129 #endif
1130
1131 if (gdbstub_port) {
1132 gdbserver_start (gdbstub_port);
1133 gdb_handlesig(cpu, 0);
1134 }
1135 trace_init_vcpu_events();
1136 cpu_loop(env);
1137 /* never exits */
1138 return 0;
1139 }
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