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scsi: pvscsi: limit loop to fetch SG list
[qemu/ar7.git] / bsd-user / main.c
blob0fb08e405d5f976929a33c3a330de97a782659e1
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 /* For tb_lock */
29 #include "cpu.h"
30 #include "exec/exec-all.h"
31 #include "tcg.h"
32 #include "qemu/timer.h"
33 #include "qemu/envlist.h"
34 #include "exec/log.h"
35 #include "trace/control.h"
36 #include "glib-compat.h"
37
38 int singlestep;
39 unsigned long mmap_min_addr;
40 unsigned long guest_base;
41 int have_guest_base;
42 unsigned long reserved_va;
43
44 static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX;
45 const char *qemu_uname_release;
46 extern char **environ;
47 enum BSDType bsd_type;
48
49 /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
50 we allocate a bigger stack. Need a better solution, for example
51 by remapping the process stack directly at the right place */
52 unsigned long x86_stack_size = 512 * 1024;
53
54 void gemu_log(const char *fmt, ...)
55 {
56 va_list ap;
57
58 va_start(ap, fmt);
59 vfprintf(stderr, fmt, ap);
60 va_end(ap);
61 }
62
63 #if defined(TARGET_I386)
64 int cpu_get_pic_interrupt(CPUX86State *env)
65 {
66 return -1;
67 }
68 #endif
69
70 /* These are no-ops because we are not threadsafe. */
71 static inline void cpu_exec_start(CPUArchState *env)
72 {
73 }
74
75 static inline void cpu_exec_end(CPUArchState *env)
76 {
77 }
78
79 static inline void start_exclusive(void)
80 {
81 }
82
83 static inline void end_exclusive(void)
84 {
85 }
86
87 void fork_start(void)
88 {
89 }
90
91 void fork_end(int child)
92 {
93 if (child) {
94 gdbserver_fork(thread_cpu);
95 }
96 }
97
98 void cpu_list_lock(void)
99 {
100 }
101
102 void cpu_list_unlock(void)
103 {
104 }
105
106 #ifdef TARGET_I386
107 /***********************************************************/
108 /* CPUX86 core interface */
109
110 uint64_t cpu_get_tsc(CPUX86State *env)
111 {
112 return cpu_get_host_ticks();
113 }
114
115 static void write_dt(void *ptr, unsigned long addr, unsigned long limit,
116 int flags)
117 {
118 unsigned int e1, e2;
119 uint32_t *p;
120 e1 = (addr << 16) | (limit & 0xffff);
121 e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
122 e2 |= flags;
123 p = ptr;
124 p[0] = tswap32(e1);
125 p[1] = tswap32(e2);
126 }
127
128 static uint64_t *idt_table;
129 #ifdef TARGET_X86_64
130 static void set_gate64(void *ptr, unsigned int type, unsigned int dpl,
131 uint64_t addr, unsigned int sel)
132 {
133 uint32_t *p, e1, e2;
134 e1 = (addr & 0xffff) | (sel << 16);
135 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
136 p = ptr;
137 p[0] = tswap32(e1);
138 p[1] = tswap32(e2);
139 p[2] = tswap32(addr >> 32);
140 p[3] = 0;
141 }
142 /* only dpl matters as we do only user space emulation */
143 static void set_idt(int n, unsigned int dpl)
144 {
145 set_gate64(idt_table + n * 2, 0, dpl, 0, 0);
146 }
147 #else
148 static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
149 uint32_t addr, unsigned int sel)
150 {
151 uint32_t *p, e1, e2;
152 e1 = (addr & 0xffff) | (sel << 16);
153 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
154 p = ptr;
155 p[0] = tswap32(e1);
156 p[1] = tswap32(e2);
157 }
158
159 /* only dpl matters as we do only user space emulation */
160 static void set_idt(int n, unsigned int dpl)
161 {
162 set_gate(idt_table + n, 0, dpl, 0, 0);
163 }
164 #endif
165
166 void cpu_loop(CPUX86State *env)
167 {
168 X86CPU *cpu = x86_env_get_cpu(env);
169 CPUState *cs = CPU(cpu);
170 int trapnr;
171 abi_ulong pc;
172 //target_siginfo_t info;
173
174 for(;;) {
175 trapnr = cpu_exec(cs);
176 switch(trapnr) {
177 case 0x80:
178 /* syscall from int $0x80 */
179 if (bsd_type == target_freebsd) {
180 abi_ulong params = (abi_ulong) env->regs[R_ESP] +
181 sizeof(int32_t);
182 int32_t syscall_nr = env->regs[R_EAX];
183 int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8;
184
185 if (syscall_nr == TARGET_FREEBSD_NR_syscall) {
186 get_user_s32(syscall_nr, params);
187 params += sizeof(int32_t);
188 } else if (syscall_nr == TARGET_FREEBSD_NR___syscall) {
189 get_user_s32(syscall_nr, params);
190 params += sizeof(int64_t);
191 }
192 get_user_s32(arg1, params);
193 params += sizeof(int32_t);
194 get_user_s32(arg2, params);
195 params += sizeof(int32_t);
196 get_user_s32(arg3, params);
197 params += sizeof(int32_t);
198 get_user_s32(arg4, params);
199 params += sizeof(int32_t);
200 get_user_s32(arg5, params);
201 params += sizeof(int32_t);
202 get_user_s32(arg6, params);
203 params += sizeof(int32_t);
204 get_user_s32(arg7, params);
205 params += sizeof(int32_t);
206 get_user_s32(arg8, params);
207 env->regs[R_EAX] = do_freebsd_syscall(env,
208 syscall_nr,
209 arg1,
210 arg2,
211 arg3,
212 arg4,
213 arg5,
214 arg6,
215 arg7,
216 arg8);
217 } else { //if (bsd_type == target_openbsd)
218 env->regs[R_EAX] = do_openbsd_syscall(env,
219 env->regs[R_EAX],
220 env->regs[R_EBX],
221 env->regs[R_ECX],
222 env->regs[R_EDX],
223 env->regs[R_ESI],
224 env->regs[R_EDI],
225 env->regs[R_EBP]);
226 }
227 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) {
228 env->regs[R_EAX] = -env->regs[R_EAX];
229 env->eflags |= CC_C;
230 } else {
231 env->eflags &= ~CC_C;
232 }
233 break;
234 #ifndef TARGET_ABI32
235 case EXCP_SYSCALL:
236 /* syscall from syscall instruction */
237 if (bsd_type == target_freebsd)
238 env->regs[R_EAX] = do_freebsd_syscall(env,
239 env->regs[R_EAX],
240 env->regs[R_EDI],
241 env->regs[R_ESI],
242 env->regs[R_EDX],
243 env->regs[R_ECX],
244 env->regs[8],
245 env->regs[9], 0, 0);
246 else { //if (bsd_type == target_openbsd)
247 env->regs[R_EAX] = do_openbsd_syscall(env,
248 env->regs[R_EAX],
249 env->regs[R_EDI],
250 env->regs[R_ESI],
251 env->regs[R_EDX],
252 env->regs[10],
253 env->regs[8],
254 env->regs[9]);
255 }
256 env->eip = env->exception_next_eip;
257 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) {
258 env->regs[R_EAX] = -env->regs[R_EAX];
259 env->eflags |= CC_C;
260 } else {
261 env->eflags &= ~CC_C;
262 }
263 break;
264 #endif
265 #if 0
266 case EXCP0B_NOSEG:
267 case EXCP0C_STACK:
268 info.si_signo = SIGBUS;
269 info.si_errno = 0;
270 info.si_code = TARGET_SI_KERNEL;
271 info._sifields._sigfault._addr = 0;
272 queue_signal(env, info.si_signo, &info);
273 break;
274 case EXCP0D_GPF:
275 /* XXX: potential problem if ABI32 */
276 #ifndef TARGET_X86_64
277 if (env->eflags & VM_MASK) {
278 handle_vm86_fault(env);
279 } else
280 #endif
281 {
282 info.si_signo = SIGSEGV;
283 info.si_errno = 0;
284 info.si_code = TARGET_SI_KERNEL;
285 info._sifields._sigfault._addr = 0;
286 queue_signal(env, info.si_signo, &info);
287 }
288 break;
289 case EXCP0E_PAGE:
290 info.si_signo = SIGSEGV;
291 info.si_errno = 0;
292 if (!(env->error_code & 1))
293 info.si_code = TARGET_SEGV_MAPERR;
294 else
295 info.si_code = TARGET_SEGV_ACCERR;
296 info._sifields._sigfault._addr = env->cr[2];
297 queue_signal(env, info.si_signo, &info);
298 break;
299 case EXCP00_DIVZ:
300 #ifndef TARGET_X86_64
301 if (env->eflags & VM_MASK) {
302 handle_vm86_trap(env, trapnr);
303 } else
304 #endif
305 {
306 /* division by zero */
307 info.si_signo = SIGFPE;
308 info.si_errno = 0;
309 info.si_code = TARGET_FPE_INTDIV;
310 info._sifields._sigfault._addr = env->eip;
311 queue_signal(env, info.si_signo, &info);
312 }
313 break;
314 case EXCP01_DB:
315 case EXCP03_INT3:
316 #ifndef TARGET_X86_64
317 if (env->eflags & VM_MASK) {
318 handle_vm86_trap(env, trapnr);
319 } else
320 #endif
321 {
322 info.si_signo = SIGTRAP;
323 info.si_errno = 0;
324 if (trapnr == EXCP01_DB) {
325 info.si_code = TARGET_TRAP_BRKPT;
326 info._sifields._sigfault._addr = env->eip;
327 } else {
328 info.si_code = TARGET_SI_KERNEL;
329 info._sifields._sigfault._addr = 0;
330 }
331 queue_signal(env, info.si_signo, &info);
332 }
333 break;
334 case EXCP04_INTO:
335 case EXCP05_BOUND:
336 #ifndef TARGET_X86_64
337 if (env->eflags & VM_MASK) {
338 handle_vm86_trap(env, trapnr);
339 } else
340 #endif
341 {
342 info.si_signo = SIGSEGV;
343 info.si_errno = 0;
344 info.si_code = TARGET_SI_KERNEL;
345 info._sifields._sigfault._addr = 0;
346 queue_signal(env, info.si_signo, &info);
347 }
348 break;
349 case EXCP06_ILLOP:
350 info.si_signo = SIGILL;
351 info.si_errno = 0;
352 info.si_code = TARGET_ILL_ILLOPN;
353 info._sifields._sigfault._addr = env->eip;
354 queue_signal(env, info.si_signo, &info);
355 break;
356 #endif
357 case EXCP_INTERRUPT:
358 /* just indicate that signals should be handled asap */
359 break;
360 #if 0
361 case EXCP_DEBUG:
362 {
363 int sig;
364
365 sig = gdb_handlesig (env, TARGET_SIGTRAP);
366 if (sig)
367 {
368 info.si_signo = sig;
369 info.si_errno = 0;
370 info.si_code = TARGET_TRAP_BRKPT;
371 queue_signal(env, info.si_signo, &info);
372 }
373 }
374 break;
375 #endif
376 default:
377 pc = env->segs[R_CS].base + env->eip;
378 fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
379 (long)pc, trapnr);
380 abort();
381 }
382 process_pending_signals(env);
383 }
384 }
385 #endif
386
387 #ifdef TARGET_SPARC
388 #define SPARC64_STACK_BIAS 2047
389
390 //#define DEBUG_WIN
391 /* WARNING: dealing with register windows _is_ complicated. More info
392 can be found at http://www.sics.se/~psm/sparcstack.html */
393 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index)
394 {
395 index = (index + cwp * 16) % (16 * env->nwindows);
396 /* wrap handling : if cwp is on the last window, then we use the
397 registers 'after' the end */
398 if (index < 8 && env->cwp == env->nwindows - 1)
399 index += 16 * env->nwindows;
400 return index;
401 }
402
403 /* save the register window 'cwp1' */
404 static inline void save_window_offset(CPUSPARCState *env, int cwp1)
405 {
406 unsigned int i;
407 abi_ulong sp_ptr;
408
409 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
410 #ifdef TARGET_SPARC64
411 if (sp_ptr & 3)
412 sp_ptr += SPARC64_STACK_BIAS;
413 #endif
414 #if defined(DEBUG_WIN)
415 printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n",
416 sp_ptr, cwp1);
417 #endif
418 for(i = 0; i < 16; i++) {
419 /* FIXME - what to do if put_user() fails? */
420 put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
421 sp_ptr += sizeof(abi_ulong);
422 }
423 }
424
425 static void save_window(CPUSPARCState *env)
426 {
427 #ifndef TARGET_SPARC64
428 unsigned int new_wim;
429 new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) &
430 ((1LL << env->nwindows) - 1);
431 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
432 env->wim = new_wim;
433 #else
434 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
435 env->cansave++;
436 env->canrestore--;
437 #endif
438 }
439
440 static void restore_window(CPUSPARCState *env)
441 {
442 #ifndef TARGET_SPARC64
443 unsigned int new_wim;
444 #endif
445 unsigned int i, cwp1;
446 abi_ulong sp_ptr;
447
448 #ifndef TARGET_SPARC64
449 new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) &
450 ((1LL << env->nwindows) - 1);
451 #endif
452
453 /* restore the invalid window */
454 cwp1 = cpu_cwp_inc(env, env->cwp + 1);
455 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
456 #ifdef TARGET_SPARC64
457 if (sp_ptr & 3)
458 sp_ptr += SPARC64_STACK_BIAS;
459 #endif
460 #if defined(DEBUG_WIN)
461 printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n",
462 sp_ptr, cwp1);
463 #endif
464 for(i = 0; i < 16; i++) {
465 /* FIXME - what to do if get_user() fails? */
466 get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
467 sp_ptr += sizeof(abi_ulong);
468 }
469 #ifdef TARGET_SPARC64
470 env->canrestore++;
471 if (env->cleanwin < env->nwindows - 1)
472 env->cleanwin++;
473 env->cansave--;
474 #else
475 env->wim = new_wim;
476 #endif
477 }
478
479 static void flush_windows(CPUSPARCState *env)
480 {
481 int offset, cwp1;
482
483 offset = 1;
484 for(;;) {
485 /* if restore would invoke restore_window(), then we can stop */
486 cwp1 = cpu_cwp_inc(env, env->cwp + offset);
487 #ifndef TARGET_SPARC64
488 if (env->wim & (1 << cwp1))
489 break;
490 #else
491 if (env->canrestore == 0)
492 break;
493 env->cansave++;
494 env->canrestore--;
495 #endif
496 save_window_offset(env, cwp1);
497 offset++;
498 }
499 cwp1 = cpu_cwp_inc(env, env->cwp + 1);
500 #ifndef TARGET_SPARC64
501 /* set wim so that restore will reload the registers */
502 env->wim = 1 << cwp1;
503 #endif
504 #if defined(DEBUG_WIN)
505 printf("flush_windows: nb=%d\n", offset - 1);
506 #endif
507 }
508
509 void cpu_loop(CPUSPARCState *env)
510 {
511 CPUState *cs = CPU(sparc_env_get_cpu(env));
512 int trapnr, ret, syscall_nr;
513 //target_siginfo_t info;
514
515 while (1) {
516 trapnr = cpu_exec(cs);
517
518 switch (trapnr) {
519 #ifndef TARGET_SPARC64
520 case 0x80:
521 #else
522 /* FreeBSD uses 0x141 for syscalls too */
523 case 0x141:
524 if (bsd_type != target_freebsd)
525 goto badtrap;
526 case 0x100:
527 #endif
528 syscall_nr = env->gregs[1];
529 if (bsd_type == target_freebsd)
530 ret = do_freebsd_syscall(env, syscall_nr,
531 env->regwptr[0], env->regwptr[1],
532 env->regwptr[2], env->regwptr[3],
533 env->regwptr[4], env->regwptr[5], 0, 0);
534 else if (bsd_type == target_netbsd)
535 ret = do_netbsd_syscall(env, syscall_nr,
536 env->regwptr[0], env->regwptr[1],
537 env->regwptr[2], env->regwptr[3],
538 env->regwptr[4], env->regwptr[5]);
539 else { //if (bsd_type == target_openbsd)
540 #if defined(TARGET_SPARC64)
541 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG |
542 TARGET_OPENBSD_SYSCALL_G2RFLAG);
543 #endif
544 ret = do_openbsd_syscall(env, syscall_nr,
545 env->regwptr[0], env->regwptr[1],
546 env->regwptr[2], env->regwptr[3],
547 env->regwptr[4], env->regwptr[5]);
548 }
549 if ((unsigned int)ret >= (unsigned int)(-515)) {
550 ret = -ret;
551 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
552 env->xcc |= PSR_CARRY;
553 #else
554 env->psr |= PSR_CARRY;
555 #endif
556 } else {
557 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
558 env->xcc &= ~PSR_CARRY;
559 #else
560 env->psr &= ~PSR_CARRY;
561 #endif
562 }
563 env->regwptr[0] = ret;
564 /* next instruction */
565 #if defined(TARGET_SPARC64)
566 if (bsd_type == target_openbsd &&
567 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) {
568 env->pc = env->gregs[2];
569 env->npc = env->pc + 4;
570 } else if (bsd_type == target_openbsd &&
571 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) {
572 env->pc = env->gregs[7];
573 env->npc = env->pc + 4;
574 } else {
575 env->pc = env->npc;
576 env->npc = env->npc + 4;
577 }
578 #else
579 env->pc = env->npc;
580 env->npc = env->npc + 4;
581 #endif
582 break;
583 case 0x83: /* flush windows */
584 #ifdef TARGET_ABI32
585 case 0x103:
586 #endif
587 flush_windows(env);
588 /* next instruction */
589 env->pc = env->npc;
590 env->npc = env->npc + 4;
591 break;
592 #ifndef TARGET_SPARC64
593 case TT_WIN_OVF: /* window overflow */
594 save_window(env);
595 break;
596 case TT_WIN_UNF: /* window underflow */
597 restore_window(env);
598 break;
599 case TT_TFAULT:
600 case TT_DFAULT:
601 #if 0
602 {
603 info.si_signo = SIGSEGV;
604 info.si_errno = 0;
605 /* XXX: check env->error_code */
606 info.si_code = TARGET_SEGV_MAPERR;
607 info._sifields._sigfault._addr = env->mmuregs[4];
608 queue_signal(env, info.si_signo, &info);
609 }
610 #endif
611 break;
612 #else
613 case TT_SPILL: /* window overflow */
614 save_window(env);
615 break;
616 case TT_FILL: /* window underflow */
617 restore_window(env);
618 break;
619 case TT_TFAULT:
620 case TT_DFAULT:
621 #if 0
622 {
623 info.si_signo = SIGSEGV;
624 info.si_errno = 0;
625 /* XXX: check env->error_code */
626 info.si_code = TARGET_SEGV_MAPERR;
627 if (trapnr == TT_DFAULT)
628 info._sifields._sigfault._addr = env->dmmuregs[4];
629 else
630 info._sifields._sigfault._addr = env->tsptr->tpc;
631 //queue_signal(env, info.si_signo, &info);
632 }
633 #endif
634 break;
635 #endif
636 case EXCP_INTERRUPT:
637 /* just indicate that signals should be handled asap */
638 break;
639 case EXCP_DEBUG:
640 {
641 int sig;
642
643 sig = gdb_handlesig(cs, TARGET_SIGTRAP);
644 #if 0
645 if (sig)
646 {
647 info.si_signo = sig;
648 info.si_errno = 0;
649 info.si_code = TARGET_TRAP_BRKPT;
650 //queue_signal(env, info.si_signo, &info);
651 }
652 #endif
653 }
654 break;
655 default:
656 #ifdef TARGET_SPARC64
657 badtrap:
658 #endif
659 printf ("Unhandled trap: 0x%x\n", trapnr);
660 cpu_dump_state(cs, stderr, fprintf, 0);
661 exit (1);
662 }
663 process_pending_signals (env);
664 }
665 }
666
667 #endif
668
669 static void usage(void)
670 {
671 printf("qemu-" TARGET_NAME " version " QEMU_VERSION QEMU_PKGVERSION
672 ", " QEMU_COPYRIGHT "\n"
673 "usage: qemu-" TARGET_NAME " [options] program [arguments...]\n"
674 "BSD CPU emulator (compiled for %s emulation)\n"
675 "\n"
676 "Standard options:\n"
677 "-h print this help\n"
678 "-g port wait gdb connection to port\n"
679 "-L path set the elf interpreter prefix (default=%s)\n"
680 "-s size set the stack size in bytes (default=%ld)\n"
681 "-cpu model select CPU (-cpu help for list)\n"
682 "-drop-ld-preload drop LD_PRELOAD for target process\n"
683 "-E var=value sets/modifies targets environment variable(s)\n"
684 "-U var unsets targets environment variable(s)\n"
685 "-B address set guest_base address to address\n"
686 "-bsd type select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n"
687 "\n"
688 "Debug options:\n"
689 "-d item1[,...] enable logging of specified items\n"
690 " (use '-d help' for a list of log items)\n"
691 "-D logfile write logs to 'logfile' (default stderr)\n"
692 "-p pagesize set the host page size to 'pagesize'\n"
693 "-singlestep always run in singlestep mode\n"
694 "-strace log system calls\n"
695 "-trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n"
696 " specify tracing options\n"
697 "\n"
698 "Environment variables:\n"
699 "QEMU_STRACE Print system calls and arguments similar to the\n"
700 " 'strace' program. Enable by setting to any value.\n"
701 "You can use -E and -U options to set/unset environment variables\n"
702 "for target process. It is possible to provide several variables\n"
703 "by repeating the option. For example:\n"
704 " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n"
705 "Note that if you provide several changes to single variable\n"
706 "last change will stay in effect.\n"
707 ,
708 TARGET_NAME,
709 interp_prefix,
710 x86_stack_size);
711 exit(1);
712 }
713
714 THREAD CPUState *thread_cpu;
715
716 /* Assumes contents are already zeroed. */
717 void init_task_state(TaskState *ts)
718 {
719 int i;
720
721 ts->used = 1;
722 ts->first_free = ts->sigqueue_table;
723 for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) {
724 ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1];
725 }
726 ts->sigqueue_table[i].next = NULL;
727 }
728
729 int main(int argc, char **argv)
730 {
731 const char *filename;
732 const char *cpu_model;
733 const char *log_file = NULL;
734 const char *log_mask = NULL;
735 struct target_pt_regs regs1, *regs = &regs1;
736 struct image_info info1, *info = &info1;
737 TaskState ts1, *ts = &ts1;
738 CPUArchState *env;
739 CPUState *cpu;
740 int optind;
741 const char *r;
742 int gdbstub_port = 0;
743 char **target_environ, **wrk;
744 envlist_t *envlist = NULL;
745 char *trace_file = NULL;
746 bsd_type = target_openbsd;
747
748 if (argc <= 1)
749 usage();
750
751 module_call_init(MODULE_INIT_QOM);
752
753 if ((envlist = envlist_create()) == NULL) {
754 (void) fprintf(stderr, "Unable to allocate envlist\n");
755 exit(1);
756 }
757
758 /* add current environment into the list */
759 for (wrk = environ; *wrk != NULL; wrk++) {
760 (void) envlist_setenv(envlist, *wrk);
761 }
762
763 cpu_model = NULL;
764
765 qemu_add_opts(&qemu_trace_opts);
766
767 optind = 1;
768 for (;;) {
769 if (optind >= argc)
770 break;
771 r = argv[optind];
772 if (r[0] != '-')
773 break;
774 optind++;
775 r++;
776 if (!strcmp(r, "-")) {
777 break;
778 } else if (!strcmp(r, "d")) {
779 if (optind >= argc) {
780 break;
781 }
782 log_mask = argv[optind++];
783 } else if (!strcmp(r, "D")) {
784 if (optind >= argc) {
785 break;
786 }
787 log_file = argv[optind++];
788 } else if (!strcmp(r, "E")) {
789 r = argv[optind++];
790 if (envlist_setenv(envlist, r) != 0)
791 usage();
792 } else if (!strcmp(r, "ignore-environment")) {
793 envlist_free(envlist);
794 if ((envlist = envlist_create()) == NULL) {
795 (void) fprintf(stderr, "Unable to allocate envlist\n");
796 exit(1);
797 }
798 } else if (!strcmp(r, "U")) {
799 r = argv[optind++];
800 if (envlist_unsetenv(envlist, r) != 0)
801 usage();
802 } else if (!strcmp(r, "s")) {
803 r = argv[optind++];
804 x86_stack_size = strtol(r, (char **)&r, 0);
805 if (x86_stack_size <= 0)
806 usage();
807 if (*r == 'M')
808 x86_stack_size *= 1024 * 1024;
809 else if (*r == 'k' || *r == 'K')
810 x86_stack_size *= 1024;
811 } else if (!strcmp(r, "L")) {
812 interp_prefix = argv[optind++];
813 } else if (!strcmp(r, "p")) {
814 qemu_host_page_size = atoi(argv[optind++]);
815 if (qemu_host_page_size == 0 ||
816 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
817 fprintf(stderr, "page size must be a power of two\n");
818 exit(1);
819 }
820 } else if (!strcmp(r, "g")) {
821 gdbstub_port = atoi(argv[optind++]);
822 } else if (!strcmp(r, "r")) {
823 qemu_uname_release = argv[optind++];
824 } else if (!strcmp(r, "cpu")) {
825 cpu_model = argv[optind++];
826 if (is_help_option(cpu_model)) {
827 /* XXX: implement xxx_cpu_list for targets that still miss it */
828 #if defined(cpu_list)
829 cpu_list(stdout, &fprintf);
830 #endif
831 exit(1);
832 }
833 } else if (!strcmp(r, "B")) {
834 guest_base = strtol(argv[optind++], NULL, 0);
835 have_guest_base = 1;
836 } else if (!strcmp(r, "drop-ld-preload")) {
837 (void) envlist_unsetenv(envlist, "LD_PRELOAD");
838 } else if (!strcmp(r, "bsd")) {
839 if (!strcasecmp(argv[optind], "freebsd")) {
840 bsd_type = target_freebsd;
841 } else if (!strcasecmp(argv[optind], "netbsd")) {
842 bsd_type = target_netbsd;
843 } else if (!strcasecmp(argv[optind], "openbsd")) {
844 bsd_type = target_openbsd;
845 } else {
846 usage();
847 }
848 optind++;
849 } else if (!strcmp(r, "singlestep")) {
850 singlestep = 1;
851 } else if (!strcmp(r, "strace")) {
852 do_strace = 1;
853 } else if (!strcmp(r, "trace")) {
854 g_free(trace_file);
855 trace_file = trace_opt_parse(optarg);
856 } else {
857 usage();
858 }
859 }
860
861 /* init debug */
862 qemu_log_needs_buffers();
863 qemu_set_log_filename(log_file, &error_fatal);
864 if (log_mask) {
865 int mask;
866
867 mask = qemu_str_to_log_mask(log_mask);
868 if (!mask) {
869 qemu_print_log_usage(stdout);
870 exit(1);
871 }
872 qemu_set_log(mask);
873 }
874
875 if (optind >= argc) {
876 usage();
877 }
878 filename = argv[optind];
879
880 if (!trace_init_backends()) {
881 exit(1);
882 }
883 trace_init_file(trace_file);
884
885 /* Zero out regs */
886 memset(regs, 0, sizeof(struct target_pt_regs));
887
888 /* Zero out image_info */
889 memset(info, 0, sizeof(struct image_info));
890
891 /* Scan interp_prefix dir for replacement files. */
892 init_paths(interp_prefix);
893
894 if (cpu_model == NULL) {
895 #if defined(TARGET_I386)
896 #ifdef TARGET_X86_64
897 cpu_model = "qemu64";
898 #else
899 cpu_model = "qemu32";
900 #endif
901 #elif defined(TARGET_SPARC)
902 #ifdef TARGET_SPARC64
903 cpu_model = "TI UltraSparc II";
904 #else
905 cpu_model = "Fujitsu MB86904";
906 #endif
907 #else
908 cpu_model = "any";
909 #endif
910 }
911 tcg_exec_init(0);
912 /* NOTE: we need to init the CPU at this stage to get
913 qemu_host_page_size */
914 cpu = cpu_init(cpu_model);
915 if (!cpu) {
916 fprintf(stderr, "Unable to find CPU definition\n");
917 exit(1);
918 }
919 env = cpu->env_ptr;
920 #if defined(TARGET_SPARC) || defined(TARGET_PPC)
921 cpu_reset(cpu);
922 #endif
923 thread_cpu = cpu;
924
925 if (getenv("QEMU_STRACE")) {
926 do_strace = 1;
927 }
928
929 target_environ = envlist_to_environ(envlist, NULL);
930 envlist_free(envlist);
931
932 /*
933 * Now that page sizes are configured in cpu_init() we can do
934 * proper page alignment for guest_base.
935 */
936 guest_base = HOST_PAGE_ALIGN(guest_base);
937
938 /*
939 * Read in mmap_min_addr kernel parameter. This value is used
940 * When loading the ELF image to determine whether guest_base
941 * is needed.
942 *
943 * When user has explicitly set the quest base, we skip this
944 * test.
945 */
946 if (!have_guest_base) {
947 FILE *fp;
948
949 if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) {
950 unsigned long tmp;
951 if (fscanf(fp, "%lu", &tmp) == 1) {
952 mmap_min_addr = tmp;
953 qemu_log_mask(CPU_LOG_PAGE, "host mmap_min_addr=0x%lx\n", mmap_min_addr);
954 }
955 fclose(fp);
956 }
957 }
958
959 if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) {
960 printf("Error loading %s\n", filename);
961 _exit(1);
962 }
963
964 for (wrk = target_environ; *wrk; wrk++) {
965 free(*wrk);
966 }
967
968 free(target_environ);
969
970 if (qemu_loglevel_mask(CPU_LOG_PAGE)) {
971 qemu_log("guest_base 0x%lx\n", guest_base);
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 /* Now that we've loaded the binary, GUEST_BASE is fixed. Delay
992 generating the prologue until now so that the prologue can take
993 the real value of GUEST_BASE into account. */
994 tcg_prologue_init(&tcg_ctx);
995
996 /* build Task State */
997 memset(ts, 0, sizeof(TaskState));
998 init_task_state(ts);
999 ts->info = info;
1000 cpu->opaque = ts;
1001
1002 #if defined(TARGET_I386)
1003 env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
1004 env->hflags |= HF_PE_MASK | HF_CPL_MASK;
1005 if (env->features[FEAT_1_EDX] & CPUID_SSE) {
1006 env->cr[4] |= CR4_OSFXSR_MASK;
1007 env->hflags |= HF_OSFXSR_MASK;
1008 }
1009 #ifndef TARGET_ABI32
1010 /* enable 64 bit mode if possible */
1011 if (!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM)) {
1012 fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n");
1013 exit(1);
1014 }
1015 env->cr[4] |= CR4_PAE_MASK;
1016 env->efer |= MSR_EFER_LMA | MSR_EFER_LME;
1017 env->hflags |= HF_LMA_MASK;
1018 #endif
1019
1020 /* flags setup : we activate the IRQs by default as in user mode */
1021 env->eflags |= IF_MASK;
1022
1023 /* linux register setup */
1024 #ifndef TARGET_ABI32
1025 env->regs[R_EAX] = regs->rax;
1026 env->regs[R_EBX] = regs->rbx;
1027 env->regs[R_ECX] = regs->rcx;
1028 env->regs[R_EDX] = regs->rdx;
1029 env->regs[R_ESI] = regs->rsi;
1030 env->regs[R_EDI] = regs->rdi;
1031 env->regs[R_EBP] = regs->rbp;
1032 env->regs[R_ESP] = regs->rsp;
1033 env->eip = regs->rip;
1034 #else
1035 env->regs[R_EAX] = regs->eax;
1036 env->regs[R_EBX] = regs->ebx;
1037 env->regs[R_ECX] = regs->ecx;
1038 env->regs[R_EDX] = regs->edx;
1039 env->regs[R_ESI] = regs->esi;
1040 env->regs[R_EDI] = regs->edi;
1041 env->regs[R_EBP] = regs->ebp;
1042 env->regs[R_ESP] = regs->esp;
1043 env->eip = regs->eip;
1044 #endif
1045
1046 /* linux interrupt setup */
1047 #ifndef TARGET_ABI32
1048 env->idt.limit = 511;
1049 #else
1050 env->idt.limit = 255;
1051 #endif
1052 env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1),
1053 PROT_READ|PROT_WRITE,
1054 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1055 idt_table = g2h(env->idt.base);
1056 set_idt(0, 0);
1057 set_idt(1, 0);
1058 set_idt(2, 0);
1059 set_idt(3, 3);
1060 set_idt(4, 3);
1061 set_idt(5, 0);
1062 set_idt(6, 0);
1063 set_idt(7, 0);
1064 set_idt(8, 0);
1065 set_idt(9, 0);
1066 set_idt(10, 0);
1067 set_idt(11, 0);
1068 set_idt(12, 0);
1069 set_idt(13, 0);
1070 set_idt(14, 0);
1071 set_idt(15, 0);
1072 set_idt(16, 0);
1073 set_idt(17, 0);
1074 set_idt(18, 0);
1075 set_idt(19, 0);
1076 set_idt(0x80, 3);
1077
1078 /* linux segment setup */
1079 {
1080 uint64_t *gdt_table;
1081 env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES,
1082 PROT_READ|PROT_WRITE,
1083 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1084 env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1;
1085 gdt_table = g2h(env->gdt.base);
1086 #ifdef TARGET_ABI32
1087 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1088 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1089 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1090 #else
1091 /* 64 bit code segment */
1092 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1093 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1094 DESC_L_MASK |
1095 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1096 #endif
1097 write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff,
1098 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1099 (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
1100 }
1101
1102 cpu_x86_load_seg(env, R_CS, __USER_CS);
1103 cpu_x86_load_seg(env, R_SS, __USER_DS);
1104 #ifdef TARGET_ABI32
1105 cpu_x86_load_seg(env, R_DS, __USER_DS);
1106 cpu_x86_load_seg(env, R_ES, __USER_DS);
1107 cpu_x86_load_seg(env, R_FS, __USER_DS);
1108 cpu_x86_load_seg(env, R_GS, __USER_DS);
1109 /* This hack makes Wine work... */
1110 env->segs[R_FS].selector = 0;
1111 #else
1112 cpu_x86_load_seg(env, R_DS, 0);
1113 cpu_x86_load_seg(env, R_ES, 0);
1114 cpu_x86_load_seg(env, R_FS, 0);
1115 cpu_x86_load_seg(env, R_GS, 0);
1116 #endif
1117 #elif defined(TARGET_SPARC)
1118 {
1119 int i;
1120 env->pc = regs->pc;
1121 env->npc = regs->npc;
1122 env->y = regs->y;
1123 for(i = 0; i < 8; i++)
1124 env->gregs[i] = regs->u_regs[i];
1125 for(i = 0; i < 8; i++)
1126 env->regwptr[i] = regs->u_regs[i + 8];
1127 }
1128 #else
1129 #error unsupported target CPU
1130 #endif
1131
1132 if (gdbstub_port) {
1133 gdbserver_start (gdbstub_port);
1134 gdb_handlesig(cpu, 0);
1135 }
1136 trace_init_vcpu_events();
1137 cpu_loop(env);
1138 /* never exits */
1139 return 0;
1140 }
AR7 emulation for QEMU