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gdbstub: Fix qOffsets packet detection
[qemu/qmp-unstable.git] / bsd-user / main.c
blob5bfaf5c4217f62d4657b2a6c6289c5dfef555353
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 <stdlib.h>
20 #include <stdio.h>
21 #include <stdarg.h>
22 #include <string.h>
23 #include <errno.h>
24 #include <unistd.h>
25 #include <machine/trap.h>
26 #include <sys/types.h>
27 #include <sys/mman.h>
28
29 #include "qemu.h"
30 #include "qemu-common.h"
31 /* For tb_lock */
32 #include "cpu.h"
33 #include "tcg.h"
34 #include "qemu/timer.h"
35 #include "qemu/envlist.h"
36
37 int singlestep;
38 #if defined(CONFIG_USE_GUEST_BASE)
39 unsigned long mmap_min_addr;
40 unsigned long guest_base;
41 int have_guest_base;
42 unsigned long reserved_va;
43 #endif
44
45 static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX;
46 const char *qemu_uname_release;
47 extern char **environ;
48 enum BSDType bsd_type;
49
50 /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
51 we allocate a bigger stack. Need a better solution, for example
52 by remapping the process stack directly at the right place */
53 unsigned long x86_stack_size = 512 * 1024;
54
55 void gemu_log(const char *fmt, ...)
56 {
57 va_list ap;
58
59 va_start(ap, fmt);
60 vfprintf(stderr, fmt, ap);
61 va_end(ap);
62 }
63
64 #if defined(TARGET_I386)
65 int cpu_get_pic_interrupt(CPUX86State *env)
66 {
67 return -1;
68 }
69 #endif
70
71 /* These are no-ops because we are not threadsafe. */
72 static inline void cpu_exec_start(CPUArchState *env)
73 {
74 }
75
76 static inline void cpu_exec_end(CPUArchState *env)
77 {
78 }
79
80 static inline void start_exclusive(void)
81 {
82 }
83
84 static inline void end_exclusive(void)
85 {
86 }
87
88 void fork_start(void)
89 {
90 }
91
92 void fork_end(int child)
93 {
94 if (child) {
95 gdbserver_fork((CPUArchState *)thread_cpu->env_ptr);
96 }
97 }
98
99 void cpu_list_lock(void)
100 {
101 }
102
103 void cpu_list_unlock(void)
104 {
105 }
106
107 #ifdef TARGET_I386
108 /***********************************************************/
109 /* CPUX86 core interface */
110
111 void cpu_smm_update(CPUX86State *env)
112 {
113 }
114
115 uint64_t cpu_get_tsc(CPUX86State *env)
116 {
117 return cpu_get_real_ticks();
118 }
119
120 static void write_dt(void *ptr, unsigned long addr, unsigned long limit,
121 int flags)
122 {
123 unsigned int e1, e2;
124 uint32_t *p;
125 e1 = (addr << 16) | (limit & 0xffff);
126 e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
127 e2 |= flags;
128 p = ptr;
129 p[0] = tswap32(e1);
130 p[1] = tswap32(e2);
131 }
132
133 static uint64_t *idt_table;
134 #ifdef TARGET_X86_64
135 static void set_gate64(void *ptr, unsigned int type, unsigned int dpl,
136 uint64_t addr, unsigned int sel)
137 {
138 uint32_t *p, e1, e2;
139 e1 = (addr & 0xffff) | (sel << 16);
140 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
141 p = ptr;
142 p[0] = tswap32(e1);
143 p[1] = tswap32(e2);
144 p[2] = tswap32(addr >> 32);
145 p[3] = 0;
146 }
147 /* only dpl matters as we do only user space emulation */
148 static void set_idt(int n, unsigned int dpl)
149 {
150 set_gate64(idt_table + n * 2, 0, dpl, 0, 0);
151 }
152 #else
153 static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
154 uint32_t addr, unsigned int sel)
155 {
156 uint32_t *p, e1, e2;
157 e1 = (addr & 0xffff) | (sel << 16);
158 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
159 p = ptr;
160 p[0] = tswap32(e1);
161 p[1] = tswap32(e2);
162 }
163
164 /* only dpl matters as we do only user space emulation */
165 static void set_idt(int n, unsigned int dpl)
166 {
167 set_gate(idt_table + n, 0, dpl, 0, 0);
168 }
169 #endif
170
171 void cpu_loop(CPUX86State *env)
172 {
173 int trapnr;
174 abi_ulong pc;
175 //target_siginfo_t info;
176
177 for(;;) {
178 trapnr = cpu_x86_exec(env);
179 switch(trapnr) {
180 case 0x80:
181 /* syscall from int $0x80 */
182 if (bsd_type == target_freebsd) {
183 abi_ulong params = (abi_ulong) env->regs[R_ESP] +
184 sizeof(int32_t);
185 int32_t syscall_nr = env->regs[R_EAX];
186 int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8;
187
188 if (syscall_nr == TARGET_FREEBSD_NR_syscall) {
189 get_user_s32(syscall_nr, params);
190 params += sizeof(int32_t);
191 } else if (syscall_nr == TARGET_FREEBSD_NR___syscall) {
192 get_user_s32(syscall_nr, params);
193 params += sizeof(int64_t);
194 }
195 get_user_s32(arg1, params);
196 params += sizeof(int32_t);
197 get_user_s32(arg2, params);
198 params += sizeof(int32_t);
199 get_user_s32(arg3, params);
200 params += sizeof(int32_t);
201 get_user_s32(arg4, params);
202 params += sizeof(int32_t);
203 get_user_s32(arg5, params);
204 params += sizeof(int32_t);
205 get_user_s32(arg6, params);
206 params += sizeof(int32_t);
207 get_user_s32(arg7, params);
208 params += sizeof(int32_t);
209 get_user_s32(arg8, params);
210 env->regs[R_EAX] = do_freebsd_syscall(env,
211 syscall_nr,
212 arg1,
213 arg2,
214 arg3,
215 arg4,
216 arg5,
217 arg6,
218 arg7,
219 arg8);
220 } else { //if (bsd_type == target_openbsd)
221 env->regs[R_EAX] = do_openbsd_syscall(env,
222 env->regs[R_EAX],
223 env->regs[R_EBX],
224 env->regs[R_ECX],
225 env->regs[R_EDX],
226 env->regs[R_ESI],
227 env->regs[R_EDI],
228 env->regs[R_EBP]);
229 }
230 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) {
231 env->regs[R_EAX] = -env->regs[R_EAX];
232 env->eflags |= CC_C;
233 } else {
234 env->eflags &= ~CC_C;
235 }
236 break;
237 #ifndef TARGET_ABI32
238 case EXCP_SYSCALL:
239 /* syscall from syscall instruction */
240 if (bsd_type == target_freebsd)
241 env->regs[R_EAX] = do_freebsd_syscall(env,
242 env->regs[R_EAX],
243 env->regs[R_EDI],
244 env->regs[R_ESI],
245 env->regs[R_EDX],
246 env->regs[R_ECX],
247 env->regs[8],
248 env->regs[9], 0, 0);
249 else { //if (bsd_type == target_openbsd)
250 env->regs[R_EAX] = do_openbsd_syscall(env,
251 env->regs[R_EAX],
252 env->regs[R_EDI],
253 env->regs[R_ESI],
254 env->regs[R_EDX],
255 env->regs[10],
256 env->regs[8],
257 env->regs[9]);
258 }
259 env->eip = env->exception_next_eip;
260 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) {
261 env->regs[R_EAX] = -env->regs[R_EAX];
262 env->eflags |= CC_C;
263 } else {
264 env->eflags &= ~CC_C;
265 }
266 break;
267 #endif
268 #if 0
269 case EXCP0B_NOSEG:
270 case EXCP0C_STACK:
271 info.si_signo = SIGBUS;
272 info.si_errno = 0;
273 info.si_code = TARGET_SI_KERNEL;
274 info._sifields._sigfault._addr = 0;
275 queue_signal(env, info.si_signo, &info);
276 break;
277 case EXCP0D_GPF:
278 /* XXX: potential problem if ABI32 */
279 #ifndef TARGET_X86_64
280 if (env->eflags & VM_MASK) {
281 handle_vm86_fault(env);
282 } else
283 #endif
284 {
285 info.si_signo = SIGSEGV;
286 info.si_errno = 0;
287 info.si_code = TARGET_SI_KERNEL;
288 info._sifields._sigfault._addr = 0;
289 queue_signal(env, info.si_signo, &info);
290 }
291 break;
292 case EXCP0E_PAGE:
293 info.si_signo = SIGSEGV;
294 info.si_errno = 0;
295 if (!(env->error_code & 1))
296 info.si_code = TARGET_SEGV_MAPERR;
297 else
298 info.si_code = TARGET_SEGV_ACCERR;
299 info._sifields._sigfault._addr = env->cr[2];
300 queue_signal(env, info.si_signo, &info);
301 break;
302 case EXCP00_DIVZ:
303 #ifndef TARGET_X86_64
304 if (env->eflags & VM_MASK) {
305 handle_vm86_trap(env, trapnr);
306 } else
307 #endif
308 {
309 /* division by zero */
310 info.si_signo = SIGFPE;
311 info.si_errno = 0;
312 info.si_code = TARGET_FPE_INTDIV;
313 info._sifields._sigfault._addr = env->eip;
314 queue_signal(env, info.si_signo, &info);
315 }
316 break;
317 case EXCP01_DB:
318 case EXCP03_INT3:
319 #ifndef TARGET_X86_64
320 if (env->eflags & VM_MASK) {
321 handle_vm86_trap(env, trapnr);
322 } else
323 #endif
324 {
325 info.si_signo = SIGTRAP;
326 info.si_errno = 0;
327 if (trapnr == EXCP01_DB) {
328 info.si_code = TARGET_TRAP_BRKPT;
329 info._sifields._sigfault._addr = env->eip;
330 } else {
331 info.si_code = TARGET_SI_KERNEL;
332 info._sifields._sigfault._addr = 0;
333 }
334 queue_signal(env, info.si_signo, &info);
335 }
336 break;
337 case EXCP04_INTO:
338 case EXCP05_BOUND:
339 #ifndef TARGET_X86_64
340 if (env->eflags & VM_MASK) {
341 handle_vm86_trap(env, trapnr);
342 } else
343 #endif
344 {
345 info.si_signo = SIGSEGV;
346 info.si_errno = 0;
347 info.si_code = TARGET_SI_KERNEL;
348 info._sifields._sigfault._addr = 0;
349 queue_signal(env, info.si_signo, &info);
350 }
351 break;
352 case EXCP06_ILLOP:
353 info.si_signo = SIGILL;
354 info.si_errno = 0;
355 info.si_code = TARGET_ILL_ILLOPN;
356 info._sifields._sigfault._addr = env->eip;
357 queue_signal(env, info.si_signo, &info);
358 break;
359 #endif
360 case EXCP_INTERRUPT:
361 /* just indicate that signals should be handled asap */
362 break;
363 #if 0
364 case EXCP_DEBUG:
365 {
366 int sig;
367
368 sig = gdb_handlesig (env, TARGET_SIGTRAP);
369 if (sig)
370 {
371 info.si_signo = sig;
372 info.si_errno = 0;
373 info.si_code = TARGET_TRAP_BRKPT;
374 queue_signal(env, info.si_signo, &info);
375 }
376 }
377 break;
378 #endif
379 default:
380 pc = env->segs[R_CS].base + env->eip;
381 fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
382 (long)pc, trapnr);
383 abort();
384 }
385 process_pending_signals(env);
386 }
387 }
388 #endif
389
390 #ifdef TARGET_SPARC
391 #define SPARC64_STACK_BIAS 2047
392
393 //#define DEBUG_WIN
394 /* WARNING: dealing with register windows _is_ complicated. More info
395 can be found at http://www.sics.se/~psm/sparcstack.html */
396 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index)
397 {
398 index = (index + cwp * 16) % (16 * env->nwindows);
399 /* wrap handling : if cwp is on the last window, then we use the
400 registers 'after' the end */
401 if (index < 8 && env->cwp == env->nwindows - 1)
402 index += 16 * env->nwindows;
403 return index;
404 }
405
406 /* save the register window 'cwp1' */
407 static inline void save_window_offset(CPUSPARCState *env, int cwp1)
408 {
409 unsigned int i;
410 abi_ulong sp_ptr;
411
412 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
413 #ifdef TARGET_SPARC64
414 if (sp_ptr & 3)
415 sp_ptr += SPARC64_STACK_BIAS;
416 #endif
417 #if defined(DEBUG_WIN)
418 printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n",
419 sp_ptr, cwp1);
420 #endif
421 for(i = 0; i < 16; i++) {
422 /* FIXME - what to do if put_user() fails? */
423 put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
424 sp_ptr += sizeof(abi_ulong);
425 }
426 }
427
428 static void save_window(CPUSPARCState *env)
429 {
430 #ifndef TARGET_SPARC64
431 unsigned int new_wim;
432 new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) &
433 ((1LL << env->nwindows) - 1);
434 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
435 env->wim = new_wim;
436 #else
437 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
438 env->cansave++;
439 env->canrestore--;
440 #endif
441 }
442
443 static void restore_window(CPUSPARCState *env)
444 {
445 #ifndef TARGET_SPARC64
446 unsigned int new_wim;
447 #endif
448 unsigned int i, cwp1;
449 abi_ulong sp_ptr;
450
451 #ifndef TARGET_SPARC64
452 new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) &
453 ((1LL << env->nwindows) - 1);
454 #endif
455
456 /* restore the invalid window */
457 cwp1 = cpu_cwp_inc(env, env->cwp + 1);
458 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
459 #ifdef TARGET_SPARC64
460 if (sp_ptr & 3)
461 sp_ptr += SPARC64_STACK_BIAS;
462 #endif
463 #if defined(DEBUG_WIN)
464 printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n",
465 sp_ptr, cwp1);
466 #endif
467 for(i = 0; i < 16; i++) {
468 /* FIXME - what to do if get_user() fails? */
469 get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
470 sp_ptr += sizeof(abi_ulong);
471 }
472 #ifdef TARGET_SPARC64
473 env->canrestore++;
474 if (env->cleanwin < env->nwindows - 1)
475 env->cleanwin++;
476 env->cansave--;
477 #else
478 env->wim = new_wim;
479 #endif
480 }
481
482 static void flush_windows(CPUSPARCState *env)
483 {
484 int offset, cwp1;
485
486 offset = 1;
487 for(;;) {
488 /* if restore would invoke restore_window(), then we can stop */
489 cwp1 = cpu_cwp_inc(env, env->cwp + offset);
490 #ifndef TARGET_SPARC64
491 if (env->wim & (1 << cwp1))
492 break;
493 #else
494 if (env->canrestore == 0)
495 break;
496 env->cansave++;
497 env->canrestore--;
498 #endif
499 save_window_offset(env, cwp1);
500 offset++;
501 }
502 cwp1 = cpu_cwp_inc(env, env->cwp + 1);
503 #ifndef TARGET_SPARC64
504 /* set wim so that restore will reload the registers */
505 env->wim = 1 << cwp1;
506 #endif
507 #if defined(DEBUG_WIN)
508 printf("flush_windows: nb=%d\n", offset - 1);
509 #endif
510 }
511
512 void cpu_loop(CPUSPARCState *env)
513 {
514 CPUState *cs = CPU(sparc_env_get_cpu(env));
515 int trapnr, ret, syscall_nr;
516 //target_siginfo_t info;
517
518 while (1) {
519 trapnr = cpu_sparc_exec (env);
520
521 switch (trapnr) {
522 #ifndef TARGET_SPARC64
523 case 0x80:
524 #else
525 /* FreeBSD uses 0x141 for syscalls too */
526 case 0x141:
527 if (bsd_type != target_freebsd)
528 goto badtrap;
529 case 0x100:
530 #endif
531 syscall_nr = env->gregs[1];
532 if (bsd_type == target_freebsd)
533 ret = do_freebsd_syscall(env, syscall_nr,
534 env->regwptr[0], env->regwptr[1],
535 env->regwptr[2], env->regwptr[3],
536 env->regwptr[4], env->regwptr[5], 0, 0);
537 else if (bsd_type == target_netbsd)
538 ret = do_netbsd_syscall(env, syscall_nr,
539 env->regwptr[0], env->regwptr[1],
540 env->regwptr[2], env->regwptr[3],
541 env->regwptr[4], env->regwptr[5]);
542 else { //if (bsd_type == target_openbsd)
543 #if defined(TARGET_SPARC64)
544 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG |
545 TARGET_OPENBSD_SYSCALL_G2RFLAG);
546 #endif
547 ret = do_openbsd_syscall(env, syscall_nr,
548 env->regwptr[0], env->regwptr[1],
549 env->regwptr[2], env->regwptr[3],
550 env->regwptr[4], env->regwptr[5]);
551 }
552 if ((unsigned int)ret >= (unsigned int)(-515)) {
553 ret = -ret;
554 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
555 env->xcc |= PSR_CARRY;
556 #else
557 env->psr |= PSR_CARRY;
558 #endif
559 } else {
560 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
561 env->xcc &= ~PSR_CARRY;
562 #else
563 env->psr &= ~PSR_CARRY;
564 #endif
565 }
566 env->regwptr[0] = ret;
567 /* next instruction */
568 #if defined(TARGET_SPARC64)
569 if (bsd_type == target_openbsd &&
570 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) {
571 env->pc = env->gregs[2];
572 env->npc = env->pc + 4;
573 } else if (bsd_type == target_openbsd &&
574 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) {
575 env->pc = env->gregs[7];
576 env->npc = env->pc + 4;
577 } else {
578 env->pc = env->npc;
579 env->npc = env->npc + 4;
580 }
581 #else
582 env->pc = env->npc;
583 env->npc = env->npc + 4;
584 #endif
585 break;
586 case 0x83: /* flush windows */
587 #ifdef TARGET_ABI32
588 case 0x103:
589 #endif
590 flush_windows(env);
591 /* next instruction */
592 env->pc = env->npc;
593 env->npc = env->npc + 4;
594 break;
595 #ifndef TARGET_SPARC64
596 case TT_WIN_OVF: /* window overflow */
597 save_window(env);
598 break;
599 case TT_WIN_UNF: /* window underflow */
600 restore_window(env);
601 break;
602 case TT_TFAULT:
603 case TT_DFAULT:
604 #if 0
605 {
606 info.si_signo = SIGSEGV;
607 info.si_errno = 0;
608 /* XXX: check env->error_code */
609 info.si_code = TARGET_SEGV_MAPERR;
610 info._sifields._sigfault._addr = env->mmuregs[4];
611 queue_signal(env, info.si_signo, &info);
612 }
613 #endif
614 break;
615 #else
616 case TT_SPILL: /* window overflow */
617 save_window(env);
618 break;
619 case TT_FILL: /* window underflow */
620 restore_window(env);
621 break;
622 case TT_TFAULT:
623 case TT_DFAULT:
624 #if 0
625 {
626 info.si_signo = SIGSEGV;
627 info.si_errno = 0;
628 /* XXX: check env->error_code */
629 info.si_code = TARGET_SEGV_MAPERR;
630 if (trapnr == TT_DFAULT)
631 info._sifields._sigfault._addr = env->dmmuregs[4];
632 else
633 info._sifields._sigfault._addr = env->tsptr->tpc;
634 //queue_signal(env, info.si_signo, &info);
635 }
636 #endif
637 break;
638 #endif
639 case EXCP_INTERRUPT:
640 /* just indicate that signals should be handled asap */
641 break;
642 case EXCP_DEBUG:
643 {
644 int sig;
645
646 sig = gdb_handlesig(cs, TARGET_SIGTRAP);
647 #if 0
648 if (sig)
649 {
650 info.si_signo = sig;
651 info.si_errno = 0;
652 info.si_code = TARGET_TRAP_BRKPT;
653 //queue_signal(env, info.si_signo, &info);
654 }
655 #endif
656 }
657 break;
658 default:
659 #ifdef TARGET_SPARC64
660 badtrap:
661 #endif
662 printf ("Unhandled trap: 0x%x\n", trapnr);
663 cpu_dump_state(cs, stderr, fprintf, 0);
664 exit (1);
665 }
666 process_pending_signals (env);
667 }
668 }
669
670 #endif
671
672 static void usage(void)
673 {
674 printf("qemu-" TARGET_NAME " version " QEMU_VERSION ", Copyright (c) 2003-2008 Fabrice Bellard\n"
675 "usage: qemu-" TARGET_NAME " [options] program [arguments...]\n"
676 "BSD CPU emulator (compiled for %s emulation)\n"
677 "\n"
678 "Standard options:\n"
679 "-h print this help\n"
680 "-g port wait gdb connection to port\n"
681 "-L path set the elf interpreter prefix (default=%s)\n"
682 "-s size set the stack size in bytes (default=%ld)\n"
683 "-cpu model select CPU (-cpu help for list)\n"
684 "-drop-ld-preload drop LD_PRELOAD for target process\n"
685 "-E var=value sets/modifies targets environment variable(s)\n"
686 "-U var unsets targets environment variable(s)\n"
687 #if defined(CONFIG_USE_GUEST_BASE)
688 "-B address set guest_base address to address\n"
689 #endif
690 "-bsd type select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n"
691 "\n"
692 "Debug options:\n"
693 "-d item1[,...] enable logging of specified items\n"
694 " (use '-d help' for a list of log items)\n"
695 "-D logfile write logs to 'logfile' (default stderr)\n"
696 "-p pagesize set the host page size to 'pagesize'\n"
697 "-singlestep always run in singlestep mode\n"
698 "-strace log system calls\n"
699 "\n"
700 "Environment variables:\n"
701 "QEMU_STRACE Print system calls and arguments similar to the\n"
702 " 'strace' program. Enable by setting to any value.\n"
703 "You can use -E and -U options to set/unset environment variables\n"
704 "for target process. It is possible to provide several variables\n"
705 "by repeating the option. For example:\n"
706 " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n"
707 "Note that if you provide several changes to single variable\n"
708 "last change will stay in effect.\n"
709 ,
710 TARGET_NAME,
711 interp_prefix,
712 x86_stack_size);
713 exit(1);
714 }
715
716 THREAD CPUState *thread_cpu;
717
718 /* Assumes contents are already zeroed. */
719 void init_task_state(TaskState *ts)
720 {
721 int i;
722
723 ts->used = 1;
724 ts->first_free = ts->sigqueue_table;
725 for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) {
726 ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1];
727 }
728 ts->sigqueue_table[i].next = NULL;
729 }
730
731 int main(int argc, char **argv)
732 {
733 const char *filename;
734 const char *cpu_model;
735 const char *log_file = NULL;
736 const char *log_mask = NULL;
737 struct target_pt_regs regs1, *regs = &regs1;
738 struct image_info info1, *info = &info1;
739 TaskState ts1, *ts = &ts1;
740 CPUArchState *env;
741 CPUState *cpu;
742 int optind;
743 const char *r;
744 int gdbstub_port = 0;
745 char **target_environ, **wrk;
746 envlist_t *envlist = NULL;
747 bsd_type = target_openbsd;
748
749 if (argc <= 1)
750 usage();
751
752 module_call_init(MODULE_INIT_QOM);
753
754 if ((envlist = envlist_create()) == NULL) {
755 (void) fprintf(stderr, "Unable to allocate envlist\n");
756 exit(1);
757 }
758
759 /* add current environment into the list */
760 for (wrk = environ; *wrk != NULL; wrk++) {
761 (void) envlist_setenv(envlist, *wrk);
762 }
763
764 cpu_model = NULL;
765 #if defined(cpudef_setup)
766 cpudef_setup(); /* parse cpu definitions in target config file (TBD) */
767 #endif
768
769 optind = 1;
770 for(;;) {
771 if (optind >= argc)
772 break;
773 r = argv[optind];
774 if (r[0] != '-')
775 break;
776 optind++;
777 r++;
778 if (!strcmp(r, "-")) {
779 break;
780 } else if (!strcmp(r, "d")) {
781 if (optind >= argc) {
782 break;
783 }
784 log_mask = argv[optind++];
785 } else if (!strcmp(r, "D")) {
786 if (optind >= argc) {
787 break;
788 }
789 log_file = argv[optind++];
790 } else if (!strcmp(r, "E")) {
791 r = argv[optind++];
792 if (envlist_setenv(envlist, r) != 0)
793 usage();
794 } else if (!strcmp(r, "ignore-environment")) {
795 envlist_free(envlist);
796 if ((envlist = envlist_create()) == NULL) {
797 (void) fprintf(stderr, "Unable to allocate envlist\n");
798 exit(1);
799 }
800 } else if (!strcmp(r, "U")) {
801 r = argv[optind++];
802 if (envlist_unsetenv(envlist, r) != 0)
803 usage();
804 } else if (!strcmp(r, "s")) {
805 r = argv[optind++];
806 x86_stack_size = strtol(r, (char **)&r, 0);
807 if (x86_stack_size <= 0)
808 usage();
809 if (*r == 'M')
810 x86_stack_size *= 1024 * 1024;
811 else if (*r == 'k' || *r == 'K')
812 x86_stack_size *= 1024;
813 } else if (!strcmp(r, "L")) {
814 interp_prefix = argv[optind++];
815 } else if (!strcmp(r, "p")) {
816 qemu_host_page_size = atoi(argv[optind++]);
817 if (qemu_host_page_size == 0 ||
818 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
819 fprintf(stderr, "page size must be a power of two\n");
820 exit(1);
821 }
822 } else if (!strcmp(r, "g")) {
823 gdbstub_port = atoi(argv[optind++]);
824 } else if (!strcmp(r, "r")) {
825 qemu_uname_release = argv[optind++];
826 } else if (!strcmp(r, "cpu")) {
827 cpu_model = argv[optind++];
828 if (is_help_option(cpu_model)) {
829 /* XXX: implement xxx_cpu_list for targets that still miss it */
830 #if defined(cpu_list)
831 cpu_list(stdout, &fprintf);
832 #endif
833 exit(1);
834 }
835 #if defined(CONFIG_USE_GUEST_BASE)
836 } else if (!strcmp(r, "B")) {
837 guest_base = strtol(argv[optind++], NULL, 0);
838 have_guest_base = 1;
839 #endif
840 } else if (!strcmp(r, "drop-ld-preload")) {
841 (void) envlist_unsetenv(envlist, "LD_PRELOAD");
842 } else if (!strcmp(r, "bsd")) {
843 if (!strcasecmp(argv[optind], "freebsd")) {
844 bsd_type = target_freebsd;
845 } else if (!strcasecmp(argv[optind], "netbsd")) {
846 bsd_type = target_netbsd;
847 } else if (!strcasecmp(argv[optind], "openbsd")) {
848 bsd_type = target_openbsd;
849 } else {
850 usage();
851 }
852 optind++;
853 } else if (!strcmp(r, "singlestep")) {
854 singlestep = 1;
855 } else if (!strcmp(r, "strace")) {
856 do_strace = 1;
857 } else
858 {
859 usage();
860 }
861 }
862
863 /* init debug */
864 qemu_set_log_filename(log_file);
865 if (log_mask) {
866 int mask;
867
868 mask = qemu_str_to_log_mask(log_mask);
869 if (!mask) {
870 qemu_print_log_usage(stdout);
871 exit(1);
872 }
873 qemu_set_log(mask);
874 }
875
876 if (optind >= argc) {
877 usage();
878 }
879 filename = argv[optind];
880
881 /* Zero out regs */
882 memset(regs, 0, sizeof(struct target_pt_regs));
883
884 /* Zero out image_info */
885 memset(info, 0, sizeof(struct image_info));
886
887 /* Scan interp_prefix dir for replacement files. */
888 init_paths(interp_prefix);
889
890 if (cpu_model == NULL) {
891 #if defined(TARGET_I386)
892 #ifdef TARGET_X86_64
893 cpu_model = "qemu64";
894 #else
895 cpu_model = "qemu32";
896 #endif
897 #elif defined(TARGET_SPARC)
898 #ifdef TARGET_SPARC64
899 cpu_model = "TI UltraSparc II";
900 #else
901 cpu_model = "Fujitsu MB86904";
902 #endif
903 #else
904 cpu_model = "any";
905 #endif
906 }
907 tcg_exec_init(0);
908 /* NOTE: we need to init the CPU at this stage to get
909 qemu_host_page_size */
910 cpu = cpu_init(cpu_model);
911 if (!cpu) {
912 fprintf(stderr, "Unable to find CPU definition\n");
913 exit(1);
914 }
915 env = cpu->env_ptr;
916 #if defined(TARGET_SPARC) || defined(TARGET_PPC)
917 cpu_reset(cpu);
918 #endif
919 thread_cpu = cpu;
920
921 if (getenv("QEMU_STRACE")) {
922 do_strace = 1;
923 }
924
925 target_environ = envlist_to_environ(envlist, NULL);
926 envlist_free(envlist);
927
928 #if defined(CONFIG_USE_GUEST_BASE)
929 /*
930 * Now that page sizes are configured in cpu_init() we can do
931 * proper page alignment for guest_base.
932 */
933 guest_base = HOST_PAGE_ALIGN(guest_base);
934
935 /*
936 * Read in mmap_min_addr kernel parameter. This value is used
937 * When loading the ELF image to determine whether guest_base
938 * is needed.
939 *
940 * When user has explicitly set the quest base, we skip this
941 * test.
942 */
943 if (!have_guest_base) {
944 FILE *fp;
945
946 if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) {
947 unsigned long tmp;
948 if (fscanf(fp, "%lu", &tmp) == 1) {
949 mmap_min_addr = tmp;
950 qemu_log("host mmap_min_addr=0x%lx\n", mmap_min_addr);
951 }
952 fclose(fp);
953 }
954 }
955 #endif /* CONFIG_USE_GUEST_BASE */
956
957 if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) {
958 printf("Error loading %s\n", filename);
959 _exit(1);
960 }
961
962 for (wrk = target_environ; *wrk; wrk++) {
963 free(*wrk);
964 }
965
966 free(target_environ);
967
968 if (qemu_log_enabled()) {
969 #if defined(CONFIG_USE_GUEST_BASE)
970 qemu_log("guest_base 0x%lx\n", guest_base);
971 #endif
972 log_page_dump();
973
974 qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk);
975 qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code);
976 qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n",
977 info->start_code);
978 qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n",
979 info->start_data);
980 qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data);
981 qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n",
982 info->start_stack);
983 qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk);
984 qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry);
985 }
986
987 target_set_brk(info->brk);
988 syscall_init();
989 signal_init();
990
991 #if defined(CONFIG_USE_GUEST_BASE)
992 /* Now that we've loaded the binary, GUEST_BASE is fixed. Delay
993 generating the prologue until now so that the prologue can take
994 the real value of GUEST_BASE into account. */
995 tcg_prologue_init(&tcg_ctx);
996 #endif
997
998 /* build Task State */
999 memset(ts, 0, sizeof(TaskState));
1000 init_task_state(ts);
1001 ts->info = info;
1002 cpu->opaque = ts;
1003
1004 #if defined(TARGET_I386)
1005 env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
1006 env->hflags |= HF_PE_MASK | HF_CPL_MASK;
1007 if (env->features[FEAT_1_EDX] & CPUID_SSE) {
1008 env->cr[4] |= CR4_OSFXSR_MASK;
1009 env->hflags |= HF_OSFXSR_MASK;
1010 }
1011 #ifndef TARGET_ABI32
1012 /* enable 64 bit mode if possible */
1013 if (!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM)) {
1014 fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n");
1015 exit(1);
1016 }
1017 env->cr[4] |= CR4_PAE_MASK;
1018 env->efer |= MSR_EFER_LMA | MSR_EFER_LME;
1019 env->hflags |= HF_LMA_MASK;
1020 #endif
1021
1022 /* flags setup : we activate the IRQs by default as in user mode */
1023 env->eflags |= IF_MASK;
1024
1025 /* linux register setup */
1026 #ifndef TARGET_ABI32
1027 env->regs[R_EAX] = regs->rax;
1028 env->regs[R_EBX] = regs->rbx;
1029 env->regs[R_ECX] = regs->rcx;
1030 env->regs[R_EDX] = regs->rdx;
1031 env->regs[R_ESI] = regs->rsi;
1032 env->regs[R_EDI] = regs->rdi;
1033 env->regs[R_EBP] = regs->rbp;
1034 env->regs[R_ESP] = regs->rsp;
1035 env->eip = regs->rip;
1036 #else
1037 env->regs[R_EAX] = regs->eax;
1038 env->regs[R_EBX] = regs->ebx;
1039 env->regs[R_ECX] = regs->ecx;
1040 env->regs[R_EDX] = regs->edx;
1041 env->regs[R_ESI] = regs->esi;
1042 env->regs[R_EDI] = regs->edi;
1043 env->regs[R_EBP] = regs->ebp;
1044 env->regs[R_ESP] = regs->esp;
1045 env->eip = regs->eip;
1046 #endif
1047
1048 /* linux interrupt setup */
1049 #ifndef TARGET_ABI32
1050 env->idt.limit = 511;
1051 #else
1052 env->idt.limit = 255;
1053 #endif
1054 env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1),
1055 PROT_READ|PROT_WRITE,
1056 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1057 idt_table = g2h(env->idt.base);
1058 set_idt(0, 0);
1059 set_idt(1, 0);
1060 set_idt(2, 0);
1061 set_idt(3, 3);
1062 set_idt(4, 3);
1063 set_idt(5, 0);
1064 set_idt(6, 0);
1065 set_idt(7, 0);
1066 set_idt(8, 0);
1067 set_idt(9, 0);
1068 set_idt(10, 0);
1069 set_idt(11, 0);
1070 set_idt(12, 0);
1071 set_idt(13, 0);
1072 set_idt(14, 0);
1073 set_idt(15, 0);
1074 set_idt(16, 0);
1075 set_idt(17, 0);
1076 set_idt(18, 0);
1077 set_idt(19, 0);
1078 set_idt(0x80, 3);
1079
1080 /* linux segment setup */
1081 {
1082 uint64_t *gdt_table;
1083 env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES,
1084 PROT_READ|PROT_WRITE,
1085 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1086 env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1;
1087 gdt_table = g2h(env->gdt.base);
1088 #ifdef TARGET_ABI32
1089 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1090 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1091 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1092 #else
1093 /* 64 bit code segment */
1094 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1095 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1096 DESC_L_MASK |
1097 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1098 #endif
1099 write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff,
1100 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1101 (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
1102 }
1103
1104 cpu_x86_load_seg(env, R_CS, __USER_CS);
1105 cpu_x86_load_seg(env, R_SS, __USER_DS);
1106 #ifdef TARGET_ABI32
1107 cpu_x86_load_seg(env, R_DS, __USER_DS);
1108 cpu_x86_load_seg(env, R_ES, __USER_DS);
1109 cpu_x86_load_seg(env, R_FS, __USER_DS);
1110 cpu_x86_load_seg(env, R_GS, __USER_DS);
1111 /* This hack makes Wine work... */
1112 env->segs[R_FS].selector = 0;
1113 #else
1114 cpu_x86_load_seg(env, R_DS, 0);
1115 cpu_x86_load_seg(env, R_ES, 0);
1116 cpu_x86_load_seg(env, R_FS, 0);
1117 cpu_x86_load_seg(env, R_GS, 0);
1118 #endif
1119 #elif defined(TARGET_SPARC)
1120 {
1121 int i;
1122 env->pc = regs->pc;
1123 env->npc = regs->npc;
1124 env->y = regs->y;
1125 for(i = 0; i < 8; i++)
1126 env->gregs[i] = regs->u_regs[i];
1127 for(i = 0; i < 8; i++)
1128 env->regwptr[i] = regs->u_regs[i + 8];
1129 }
1130 #else
1131 #error unsupported target CPU
1132 #endif
1133
1134 if (gdbstub_port) {
1135 gdbserver_start (gdbstub_port);
1136 gdb_handlesig(cpu, 0);
1137 }
1138 cpu_loop(env);
1139 /* never exits */
1140 return 0;
1141 }
QEMU Monitor Protocol