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