?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
target-i386: Fix eflags.TF/#DB handling of syscall/sysret insns
[qemu/ar7.git] / bsd-user / main.c
blob714a692e6faac37d7c380fc8be57bf3b48277f48
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 void fork_start(void)
71 {
72 }
73
74 void fork_end(int child)
75 {
76 if (child) {
77 gdbserver_fork(thread_cpu);
78 }
79 }
80
81 #ifdef TARGET_I386
82 /***********************************************************/
83 /* CPUX86 core interface */
84
85 uint64_t cpu_get_tsc(CPUX86State *env)
86 {
87 return cpu_get_host_ticks();
88 }
89
90 static void write_dt(void *ptr, unsigned long addr, unsigned long limit,
91 int flags)
92 {
93 unsigned int e1, e2;
94 uint32_t *p;
95 e1 = (addr << 16) | (limit & 0xffff);
96 e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
97 e2 |= flags;
98 p = ptr;
99 p[0] = tswap32(e1);
100 p[1] = tswap32(e2);
101 }
102
103 static uint64_t *idt_table;
104 #ifdef TARGET_X86_64
105 static void set_gate64(void *ptr, unsigned int type, unsigned int dpl,
106 uint64_t addr, unsigned int sel)
107 {
108 uint32_t *p, e1, e2;
109 e1 = (addr & 0xffff) | (sel << 16);
110 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
111 p = ptr;
112 p[0] = tswap32(e1);
113 p[1] = tswap32(e2);
114 p[2] = tswap32(addr >> 32);
115 p[3] = 0;
116 }
117 /* only dpl matters as we do only user space emulation */
118 static void set_idt(int n, unsigned int dpl)
119 {
120 set_gate64(idt_table + n * 2, 0, dpl, 0, 0);
121 }
122 #else
123 static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
124 uint32_t addr, unsigned int sel)
125 {
126 uint32_t *p, e1, e2;
127 e1 = (addr & 0xffff) | (sel << 16);
128 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
129 p = ptr;
130 p[0] = tswap32(e1);
131 p[1] = tswap32(e2);
132 }
133
134 /* only dpl matters as we do only user space emulation */
135 static void set_idt(int n, unsigned int dpl)
136 {
137 set_gate(idt_table + n, 0, dpl, 0, 0);
138 }
139 #endif
140
141 void cpu_loop(CPUX86State *env)
142 {
143 X86CPU *cpu = x86_env_get_cpu(env);
144 CPUState *cs = CPU(cpu);
145 int trapnr;
146 abi_ulong pc;
147 //target_siginfo_t info;
148
149 for(;;) {
150 cpu_exec_start(cs);
151 trapnr = cpu_exec(cs);
152 cpu_exec_end(cs);
153 process_queued_cpu_work(cs);
154
155 switch(trapnr) {
156 case 0x80:
157 /* syscall from int $0x80 */
158 if (bsd_type == target_freebsd) {
159 abi_ulong params = (abi_ulong) env->regs[R_ESP] +
160 sizeof(int32_t);
161 int32_t syscall_nr = env->regs[R_EAX];
162 int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8;
163
164 if (syscall_nr == TARGET_FREEBSD_NR_syscall) {
165 get_user_s32(syscall_nr, params);
166 params += sizeof(int32_t);
167 } else if (syscall_nr == TARGET_FREEBSD_NR___syscall) {
168 get_user_s32(syscall_nr, params);
169 params += sizeof(int64_t);
170 }
171 get_user_s32(arg1, params);
172 params += sizeof(int32_t);
173 get_user_s32(arg2, params);
174 params += sizeof(int32_t);
175 get_user_s32(arg3, params);
176 params += sizeof(int32_t);
177 get_user_s32(arg4, params);
178 params += sizeof(int32_t);
179 get_user_s32(arg5, params);
180 params += sizeof(int32_t);
181 get_user_s32(arg6, params);
182 params += sizeof(int32_t);
183 get_user_s32(arg7, params);
184 params += sizeof(int32_t);
185 get_user_s32(arg8, params);
186 env->regs[R_EAX] = do_freebsd_syscall(env,
187 syscall_nr,
188 arg1,
189 arg2,
190 arg3,
191 arg4,
192 arg5,
193 arg6,
194 arg7,
195 arg8);
196 } else { //if (bsd_type == target_openbsd)
197 env->regs[R_EAX] = do_openbsd_syscall(env,
198 env->regs[R_EAX],
199 env->regs[R_EBX],
200 env->regs[R_ECX],
201 env->regs[R_EDX],
202 env->regs[R_ESI],
203 env->regs[R_EDI],
204 env->regs[R_EBP]);
205 }
206 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) {
207 env->regs[R_EAX] = -env->regs[R_EAX];
208 env->eflags |= CC_C;
209 } else {
210 env->eflags &= ~CC_C;
211 }
212 break;
213 #ifndef TARGET_ABI32
214 case EXCP_SYSCALL:
215 /* syscall from syscall instruction */
216 if (bsd_type == target_freebsd)
217 env->regs[R_EAX] = do_freebsd_syscall(env,
218 env->regs[R_EAX],
219 env->regs[R_EDI],
220 env->regs[R_ESI],
221 env->regs[R_EDX],
222 env->regs[R_ECX],
223 env->regs[8],
224 env->regs[9], 0, 0);
225 else { //if (bsd_type == target_openbsd)
226 env->regs[R_EAX] = do_openbsd_syscall(env,
227 env->regs[R_EAX],
228 env->regs[R_EDI],
229 env->regs[R_ESI],
230 env->regs[R_EDX],
231 env->regs[10],
232 env->regs[8],
233 env->regs[9]);
234 }
235 env->eip = env->exception_next_eip;
236 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) {
237 env->regs[R_EAX] = -env->regs[R_EAX];
238 env->eflags |= CC_C;
239 } else {
240 env->eflags &= ~CC_C;
241 }
242 break;
243 #endif
244 #if 0
245 case EXCP0B_NOSEG:
246 case EXCP0C_STACK:
247 info.si_signo = SIGBUS;
248 info.si_errno = 0;
249 info.si_code = TARGET_SI_KERNEL;
250 info._sifields._sigfault._addr = 0;
251 queue_signal(env, info.si_signo, &info);
252 break;
253 case EXCP0D_GPF:
254 /* XXX: potential problem if ABI32 */
255 #ifndef TARGET_X86_64
256 if (env->eflags & VM_MASK) {
257 handle_vm86_fault(env);
258 } else
259 #endif
260 {
261 info.si_signo = SIGSEGV;
262 info.si_errno = 0;
263 info.si_code = TARGET_SI_KERNEL;
264 info._sifields._sigfault._addr = 0;
265 queue_signal(env, info.si_signo, &info);
266 }
267 break;
268 case EXCP0E_PAGE:
269 info.si_signo = SIGSEGV;
270 info.si_errno = 0;
271 if (!(env->error_code & 1))
272 info.si_code = TARGET_SEGV_MAPERR;
273 else
274 info.si_code = TARGET_SEGV_ACCERR;
275 info._sifields._sigfault._addr = env->cr[2];
276 queue_signal(env, info.si_signo, &info);
277 break;
278 case EXCP00_DIVZ:
279 #ifndef TARGET_X86_64
280 if (env->eflags & VM_MASK) {
281 handle_vm86_trap(env, trapnr);
282 } else
283 #endif
284 {
285 /* division by zero */
286 info.si_signo = SIGFPE;
287 info.si_errno = 0;
288 info.si_code = TARGET_FPE_INTDIV;
289 info._sifields._sigfault._addr = env->eip;
290 queue_signal(env, info.si_signo, &info);
291 }
292 break;
293 case EXCP01_DB:
294 case EXCP03_INT3:
295 #ifndef TARGET_X86_64
296 if (env->eflags & VM_MASK) {
297 handle_vm86_trap(env, trapnr);
298 } else
299 #endif
300 {
301 info.si_signo = SIGTRAP;
302 info.si_errno = 0;
303 if (trapnr == EXCP01_DB) {
304 info.si_code = TARGET_TRAP_BRKPT;
305 info._sifields._sigfault._addr = env->eip;
306 } else {
307 info.si_code = TARGET_SI_KERNEL;
308 info._sifields._sigfault._addr = 0;
309 }
310 queue_signal(env, info.si_signo, &info);
311 }
312 break;
313 case EXCP04_INTO:
314 case EXCP05_BOUND:
315 #ifndef TARGET_X86_64
316 if (env->eflags & VM_MASK) {
317 handle_vm86_trap(env, trapnr);
318 } else
319 #endif
320 {
321 info.si_signo = SIGSEGV;
322 info.si_errno = 0;
323 info.si_code = TARGET_SI_KERNEL;
324 info._sifields._sigfault._addr = 0;
325 queue_signal(env, info.si_signo, &info);
326 }
327 break;
328 case EXCP06_ILLOP:
329 info.si_signo = SIGILL;
330 info.si_errno = 0;
331 info.si_code = TARGET_ILL_ILLOPN;
332 info._sifields._sigfault._addr = env->eip;
333 queue_signal(env, info.si_signo, &info);
334 break;
335 #endif
336 case EXCP_INTERRUPT:
337 /* just indicate that signals should be handled asap */
338 break;
339 #if 0
340 case EXCP_DEBUG:
341 {
342 int sig;
343
344 sig = gdb_handlesig (env, TARGET_SIGTRAP);
345 if (sig)
346 {
347 info.si_signo = sig;
348 info.si_errno = 0;
349 info.si_code = TARGET_TRAP_BRKPT;
350 queue_signal(env, info.si_signo, &info);
351 }
352 }
353 break;
354 #endif
355 default:
356 pc = env->segs[R_CS].base + env->eip;
357 fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
358 (long)pc, trapnr);
359 abort();
360 }
361 process_pending_signals(env);
362 }
363 }
364 #endif
365
366 #ifdef TARGET_SPARC
367 #define SPARC64_STACK_BIAS 2047
368
369 //#define DEBUG_WIN
370 /* WARNING: dealing with register windows _is_ complicated. More info
371 can be found at http://www.sics.se/~psm/sparcstack.html */
372 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index)
373 {
374 index = (index + cwp * 16) % (16 * env->nwindows);
375 /* wrap handling : if cwp is on the last window, then we use the
376 registers 'after' the end */
377 if (index < 8 && env->cwp == env->nwindows - 1)
378 index += 16 * env->nwindows;
379 return index;
380 }
381
382 /* save the register window 'cwp1' */
383 static inline void save_window_offset(CPUSPARCState *env, int cwp1)
384 {
385 unsigned int i;
386 abi_ulong sp_ptr;
387
388 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
389 #ifdef TARGET_SPARC64
390 if (sp_ptr & 3)
391 sp_ptr += SPARC64_STACK_BIAS;
392 #endif
393 #if defined(DEBUG_WIN)
394 printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n",
395 sp_ptr, cwp1);
396 #endif
397 for(i = 0; i < 16; i++) {
398 /* FIXME - what to do if put_user() fails? */
399 put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
400 sp_ptr += sizeof(abi_ulong);
401 }
402 }
403
404 static void save_window(CPUSPARCState *env)
405 {
406 #ifndef TARGET_SPARC64
407 unsigned int new_wim;
408 new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) &
409 ((1LL << env->nwindows) - 1);
410 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
411 env->wim = new_wim;
412 #else
413 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
414 env->cansave++;
415 env->canrestore--;
416 #endif
417 }
418
419 static void restore_window(CPUSPARCState *env)
420 {
421 #ifndef TARGET_SPARC64
422 unsigned int new_wim;
423 #endif
424 unsigned int i, cwp1;
425 abi_ulong sp_ptr;
426
427 #ifndef TARGET_SPARC64
428 new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) &
429 ((1LL << env->nwindows) - 1);
430 #endif
431
432 /* restore the invalid window */
433 cwp1 = cpu_cwp_inc(env, env->cwp + 1);
434 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
435 #ifdef TARGET_SPARC64
436 if (sp_ptr & 3)
437 sp_ptr += SPARC64_STACK_BIAS;
438 #endif
439 #if defined(DEBUG_WIN)
440 printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n",
441 sp_ptr, cwp1);
442 #endif
443 for(i = 0; i < 16; i++) {
444 /* FIXME - what to do if get_user() fails? */
445 get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
446 sp_ptr += sizeof(abi_ulong);
447 }
448 #ifdef TARGET_SPARC64
449 env->canrestore++;
450 if (env->cleanwin < env->nwindows - 1)
451 env->cleanwin++;
452 env->cansave--;
453 #else
454 env->wim = new_wim;
455 #endif
456 }
457
458 static void flush_windows(CPUSPARCState *env)
459 {
460 int offset, cwp1;
461
462 offset = 1;
463 for(;;) {
464 /* if restore would invoke restore_window(), then we can stop */
465 cwp1 = cpu_cwp_inc(env, env->cwp + offset);
466 #ifndef TARGET_SPARC64
467 if (env->wim & (1 << cwp1))
468 break;
469 #else
470 if (env->canrestore == 0)
471 break;
472 env->cansave++;
473 env->canrestore--;
474 #endif
475 save_window_offset(env, cwp1);
476 offset++;
477 }
478 cwp1 = cpu_cwp_inc(env, env->cwp + 1);
479 #ifndef TARGET_SPARC64
480 /* set wim so that restore will reload the registers */
481 env->wim = 1 << cwp1;
482 #endif
483 #if defined(DEBUG_WIN)
484 printf("flush_windows: nb=%d\n", offset - 1);
485 #endif
486 }
487
488 void cpu_loop(CPUSPARCState *env)
489 {
490 CPUState *cs = CPU(sparc_env_get_cpu(env));
491 int trapnr, ret, syscall_nr;
492 //target_siginfo_t info;
493
494 while (1) {
495 cpu_exec_start(cs);
496 trapnr = cpu_exec(cs);
497 cpu_exec_end(cs);
498 process_queued_cpu_work(cs);
499
500 switch (trapnr) {
501 #ifndef TARGET_SPARC64
502 case 0x80:
503 #else
504 /* FreeBSD uses 0x141 for syscalls too */
505 case 0x141:
506 if (bsd_type != target_freebsd)
507 goto badtrap;
508 case 0x100:
509 #endif
510 syscall_nr = env->gregs[1];
511 if (bsd_type == target_freebsd)
512 ret = do_freebsd_syscall(env, syscall_nr,
513 env->regwptr[0], env->regwptr[1],
514 env->regwptr[2], env->regwptr[3],
515 env->regwptr[4], env->regwptr[5], 0, 0);
516 else if (bsd_type == target_netbsd)
517 ret = do_netbsd_syscall(env, syscall_nr,
518 env->regwptr[0], env->regwptr[1],
519 env->regwptr[2], env->regwptr[3],
520 env->regwptr[4], env->regwptr[5]);
521 else { //if (bsd_type == target_openbsd)
522 #if defined(TARGET_SPARC64)
523 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG |
524 TARGET_OPENBSD_SYSCALL_G2RFLAG);
525 #endif
526 ret = do_openbsd_syscall(env, syscall_nr,
527 env->regwptr[0], env->regwptr[1],
528 env->regwptr[2], env->regwptr[3],
529 env->regwptr[4], env->regwptr[5]);
530 }
531 if ((unsigned int)ret >= (unsigned int)(-515)) {
532 ret = -ret;
533 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
534 env->xcc |= PSR_CARRY;
535 #else
536 env->psr |= PSR_CARRY;
537 #endif
538 } else {
539 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
540 env->xcc &= ~PSR_CARRY;
541 #else
542 env->psr &= ~PSR_CARRY;
543 #endif
544 }
545 env->regwptr[0] = ret;
546 /* next instruction */
547 #if defined(TARGET_SPARC64)
548 if (bsd_type == target_openbsd &&
549 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) {
550 env->pc = env->gregs[2];
551 env->npc = env->pc + 4;
552 } else if (bsd_type == target_openbsd &&
553 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) {
554 env->pc = env->gregs[7];
555 env->npc = env->pc + 4;
556 } else {
557 env->pc = env->npc;
558 env->npc = env->npc + 4;
559 }
560 #else
561 env->pc = env->npc;
562 env->npc = env->npc + 4;
563 #endif
564 break;
565 case 0x83: /* flush windows */
566 #ifdef TARGET_ABI32
567 case 0x103:
568 #endif
569 flush_windows(env);
570 /* next instruction */
571 env->pc = env->npc;
572 env->npc = env->npc + 4;
573 break;
574 #ifndef TARGET_SPARC64
575 case TT_WIN_OVF: /* window overflow */
576 save_window(env);
577 break;
578 case TT_WIN_UNF: /* window underflow */
579 restore_window(env);
580 break;
581 case TT_TFAULT:
582 case TT_DFAULT:
583 #if 0
584 {
585 info.si_signo = SIGSEGV;
586 info.si_errno = 0;
587 /* XXX: check env->error_code */
588 info.si_code = TARGET_SEGV_MAPERR;
589 info._sifields._sigfault._addr = env->mmuregs[4];
590 queue_signal(env, info.si_signo, &info);
591 }
592 #endif
593 break;
594 #else
595 case TT_SPILL: /* window overflow */
596 save_window(env);
597 break;
598 case TT_FILL: /* window underflow */
599 restore_window(env);
600 break;
601 case TT_TFAULT:
602 case TT_DFAULT:
603 #if 0
604 {
605 info.si_signo = SIGSEGV;
606 info.si_errno = 0;
607 /* XXX: check env->error_code */
608 info.si_code = TARGET_SEGV_MAPERR;
609 if (trapnr == TT_DFAULT)
610 info._sifields._sigfault._addr = env->dmmuregs[4];
611 else
612 info._sifields._sigfault._addr = env->tsptr->tpc;
613 //queue_signal(env, info.si_signo, &info);
614 }
615 #endif
616 break;
617 #endif
618 case EXCP_INTERRUPT:
619 /* just indicate that signals should be handled asap */
620 break;
621 case EXCP_DEBUG:
622 {
623 int sig;
624
625 sig = 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 if ((envlist = envlist_create()) == NULL) {
748 (void) fprintf(stderr, "Unable to allocate envlist\n");
749 exit(1);
750 }
751
752 /* add current environment into the list */
753 for (wrk = environ; *wrk != NULL; wrk++) {
754 (void) envlist_setenv(envlist, *wrk);
755 }
756
757 cpu_model = NULL;
758
759 qemu_add_opts(&qemu_trace_opts);
760
761 optind = 1;
762 for (;;) {
763 if (optind >= argc)
764 break;
765 r = argv[optind];
766 if (r[0] != '-')
767 break;
768 optind++;
769 r++;
770 if (!strcmp(r, "-")) {
771 break;
772 } else if (!strcmp(r, "d")) {
773 if (optind >= argc) {
774 break;
775 }
776 log_mask = argv[optind++];
777 } else if (!strcmp(r, "D")) {
778 if (optind >= argc) {
779 break;
780 }
781 log_file = argv[optind++];
782 } else if (!strcmp(r, "E")) {
783 r = argv[optind++];
784 if (envlist_setenv(envlist, r) != 0)
785 usage();
786 } else if (!strcmp(r, "ignore-environment")) {
787 envlist_free(envlist);
788 if ((envlist = envlist_create()) == NULL) {
789 (void) fprintf(stderr, "Unable to allocate envlist\n");
790 exit(1);
791 }
792 } else if (!strcmp(r, "U")) {
793 r = argv[optind++];
794 if (envlist_unsetenv(envlist, r) != 0)
795 usage();
796 } else if (!strcmp(r, "s")) {
797 r = argv[optind++];
798 x86_stack_size = strtol(r, (char **)&r, 0);
799 if (x86_stack_size <= 0)
800 usage();
801 if (*r == 'M')
802 x86_stack_size *= 1024 * 1024;
803 else if (*r == 'k' || *r == 'K')
804 x86_stack_size *= 1024;
805 } else if (!strcmp(r, "L")) {
806 interp_prefix = argv[optind++];
807 } else if (!strcmp(r, "p")) {
808 qemu_host_page_size = atoi(argv[optind++]);
809 if (qemu_host_page_size == 0 ||
810 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
811 fprintf(stderr, "page size must be a power of two\n");
812 exit(1);
813 }
814 } else if (!strcmp(r, "g")) {
815 gdbstub_port = atoi(argv[optind++]);
816 } else if (!strcmp(r, "r")) {
817 qemu_uname_release = argv[optind++];
818 } else if (!strcmp(r, "cpu")) {
819 cpu_model = argv[optind++];
820 if (is_help_option(cpu_model)) {
821 /* XXX: implement xxx_cpu_list for targets that still miss it */
822 #if defined(cpu_list)
823 cpu_list(stdout, &fprintf);
824 #endif
825 exit(1);
826 }
827 } else if (!strcmp(r, "B")) {
828 guest_base = strtol(argv[optind++], NULL, 0);
829 have_guest_base = 1;
830 } else if (!strcmp(r, "drop-ld-preload")) {
831 (void) envlist_unsetenv(envlist, "LD_PRELOAD");
832 } else if (!strcmp(r, "bsd")) {
833 if (!strcasecmp(argv[optind], "freebsd")) {
834 bsd_type = target_freebsd;
835 } else if (!strcasecmp(argv[optind], "netbsd")) {
836 bsd_type = target_netbsd;
837 } else if (!strcasecmp(argv[optind], "openbsd")) {
838 bsd_type = target_openbsd;
839 } else {
840 usage();
841 }
842 optind++;
843 } else if (!strcmp(r, "singlestep")) {
844 singlestep = 1;
845 } else if (!strcmp(r, "strace")) {
846 do_strace = 1;
847 } else if (!strcmp(r, "trace")) {
848 g_free(trace_file);
849 trace_file = trace_opt_parse(optarg);
850 } else {
851 usage();
852 }
853 }
854
855 /* init debug */
856 qemu_log_needs_buffers();
857 qemu_set_log_filename(log_file, &error_fatal);
858 if (log_mask) {
859 int mask;
860
861 mask = qemu_str_to_log_mask(log_mask);
862 if (!mask) {
863 qemu_print_log_usage(stdout);
864 exit(1);
865 }
866 qemu_set_log(mask);
867 }
868
869 if (optind >= argc) {
870 usage();
871 }
872 filename = argv[optind];
873
874 if (!trace_init_backends()) {
875 exit(1);
876 }
877 trace_init_file(trace_file);
878
879 /* Zero out regs */
880 memset(regs, 0, sizeof(struct target_pt_regs));
881
882 /* Zero out image_info */
883 memset(info, 0, sizeof(struct image_info));
884
885 /* Scan interp_prefix dir for replacement files. */
886 init_paths(interp_prefix);
887
888 if (cpu_model == NULL) {
889 #if defined(TARGET_I386)
890 #ifdef TARGET_X86_64
891 cpu_model = "qemu64";
892 #else
893 cpu_model = "qemu32";
894 #endif
895 #elif defined(TARGET_SPARC)
896 #ifdef TARGET_SPARC64
897 cpu_model = "TI UltraSparc II";
898 #else
899 cpu_model = "Fujitsu MB86904";
900 #endif
901 #else
902 cpu_model = "any";
903 #endif
904 }
905 tcg_exec_init(0);
906 /* NOTE: we need to init the CPU at this stage to get
907 qemu_host_page_size */
908 cpu = cpu_init(cpu_model);
909 if (!cpu) {
910 fprintf(stderr, "Unable to find CPU definition\n");
911 exit(1);
912 }
913 env = cpu->env_ptr;
914 #if defined(TARGET_SPARC) || defined(TARGET_PPC)
915 cpu_reset(cpu);
916 #endif
917 thread_cpu = cpu;
918
919 if (getenv("QEMU_STRACE")) {
920 do_strace = 1;
921 }
922
923 target_environ = envlist_to_environ(envlist, NULL);
924 envlist_free(envlist);
925
926 /*
927 * Now that page sizes are configured in cpu_init() we can do
928 * proper page alignment for guest_base.
929 */
930 guest_base = HOST_PAGE_ALIGN(guest_base);
931
932 /*
933 * Read in mmap_min_addr kernel parameter. This value is used
934 * When loading the ELF image to determine whether guest_base
935 * is needed.
936 *
937 * When user has explicitly set the quest base, we skip this
938 * test.
939 */
940 if (!have_guest_base) {
941 FILE *fp;
942
943 if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) {
944 unsigned long tmp;
945 if (fscanf(fp, "%lu", &tmp) == 1) {
946 mmap_min_addr = tmp;
947 qemu_log_mask(CPU_LOG_PAGE, "host mmap_min_addr=0x%lx\n", mmap_min_addr);
948 }
949 fclose(fp);
950 }
951 }
952
953 if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) {
954 printf("Error loading %s\n", filename);
955 _exit(1);
956 }
957
958 for (wrk = target_environ; *wrk; wrk++) {
959 free(*wrk);
960 }
961
962 free(target_environ);
963
964 if (qemu_loglevel_mask(CPU_LOG_PAGE)) {
965 qemu_log("guest_base 0x%lx\n", guest_base);
966 log_page_dump();
967
968 qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk);
969 qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code);
970 qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n",
971 info->start_code);
972 qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n",
973 info->start_data);
974 qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data);
975 qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n",
976 info->start_stack);
977 qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk);
978 qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry);
979 }
980
981 target_set_brk(info->brk);
982 syscall_init();
983 signal_init();
984
985 /* Now that we've loaded the binary, GUEST_BASE is fixed. Delay
986 generating the prologue until now so that the prologue can take
987 the real value of GUEST_BASE into account. */
988 tcg_prologue_init(&tcg_ctx);
989
990 /* build Task State */
991 memset(ts, 0, sizeof(TaskState));
992 init_task_state(ts);
993 ts->info = info;
994 cpu->opaque = ts;
995
996 #if defined(TARGET_I386)
997 env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
998 env->hflags |= HF_PE_MASK | HF_CPL_MASK;
999 if (env->features[FEAT_1_EDX] & CPUID_SSE) {
1000 env->cr[4] |= CR4_OSFXSR_MASK;
1001 env->hflags |= HF_OSFXSR_MASK;
1002 }
1003 #ifndef TARGET_ABI32
1004 /* enable 64 bit mode if possible */
1005 if (!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM)) {
1006 fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n");
1007 exit(1);
1008 }
1009 env->cr[4] |= CR4_PAE_MASK;
1010 env->efer |= MSR_EFER_LMA | MSR_EFER_LME;
1011 env->hflags |= HF_LMA_MASK;
1012 #endif
1013
1014 /* flags setup : we activate the IRQs by default as in user mode */
1015 env->eflags |= IF_MASK;
1016
1017 /* linux register setup */
1018 #ifndef TARGET_ABI32
1019 env->regs[R_EAX] = regs->rax;
1020 env->regs[R_EBX] = regs->rbx;
1021 env->regs[R_ECX] = regs->rcx;
1022 env->regs[R_EDX] = regs->rdx;
1023 env->regs[R_ESI] = regs->rsi;
1024 env->regs[R_EDI] = regs->rdi;
1025 env->regs[R_EBP] = regs->rbp;
1026 env->regs[R_ESP] = regs->rsp;
1027 env->eip = regs->rip;
1028 #else
1029 env->regs[R_EAX] = regs->eax;
1030 env->regs[R_EBX] = regs->ebx;
1031 env->regs[R_ECX] = regs->ecx;
1032 env->regs[R_EDX] = regs->edx;
1033 env->regs[R_ESI] = regs->esi;
1034 env->regs[R_EDI] = regs->edi;
1035 env->regs[R_EBP] = regs->ebp;
1036 env->regs[R_ESP] = regs->esp;
1037 env->eip = regs->eip;
1038 #endif
1039
1040 /* linux interrupt setup */
1041 #ifndef TARGET_ABI32
1042 env->idt.limit = 511;
1043 #else
1044 env->idt.limit = 255;
1045 #endif
1046 env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1),
1047 PROT_READ|PROT_WRITE,
1048 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1049 idt_table = g2h(env->idt.base);
1050 set_idt(0, 0);
1051 set_idt(1, 0);
1052 set_idt(2, 0);
1053 set_idt(3, 3);
1054 set_idt(4, 3);
1055 set_idt(5, 0);
1056 set_idt(6, 0);
1057 set_idt(7, 0);
1058 set_idt(8, 0);
1059 set_idt(9, 0);
1060 set_idt(10, 0);
1061 set_idt(11, 0);
1062 set_idt(12, 0);
1063 set_idt(13, 0);
1064 set_idt(14, 0);
1065 set_idt(15, 0);
1066 set_idt(16, 0);
1067 set_idt(17, 0);
1068 set_idt(18, 0);
1069 set_idt(19, 0);
1070 set_idt(0x80, 3);
1071
1072 /* linux segment setup */
1073 {
1074 uint64_t *gdt_table;
1075 env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES,
1076 PROT_READ|PROT_WRITE,
1077 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1078 env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1;
1079 gdt_table = g2h(env->gdt.base);
1080 #ifdef TARGET_ABI32
1081 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1082 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1083 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1084 #else
1085 /* 64 bit code segment */
1086 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1087 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1088 DESC_L_MASK |
1089 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1090 #endif
1091 write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff,
1092 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1093 (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
1094 }
1095
1096 cpu_x86_load_seg(env, R_CS, __USER_CS);
1097 cpu_x86_load_seg(env, R_SS, __USER_DS);
1098 #ifdef TARGET_ABI32
1099 cpu_x86_load_seg(env, R_DS, __USER_DS);
1100 cpu_x86_load_seg(env, R_ES, __USER_DS);
1101 cpu_x86_load_seg(env, R_FS, __USER_DS);
1102 cpu_x86_load_seg(env, R_GS, __USER_DS);
1103 /* This hack makes Wine work... */
1104 env->segs[R_FS].selector = 0;
1105 #else
1106 cpu_x86_load_seg(env, R_DS, 0);
1107 cpu_x86_load_seg(env, R_ES, 0);
1108 cpu_x86_load_seg(env, R_FS, 0);
1109 cpu_x86_load_seg(env, R_GS, 0);
1110 #endif
1111 #elif defined(TARGET_SPARC)
1112 {
1113 int i;
1114 env->pc = regs->pc;
1115 env->npc = regs->npc;
1116 env->y = regs->y;
1117 for(i = 0; i < 8; i++)
1118 env->gregs[i] = regs->u_regs[i];
1119 for(i = 0; i < 8; i++)
1120 env->regwptr[i] = regs->u_regs[i + 8];
1121 }
1122 #else
1123 #error unsupported target CPU
1124 #endif
1125
1126 if (gdbstub_port) {
1127 gdbserver_start (gdbstub_port);
1128 gdb_handlesig(cpu, 0);
1129 }
1130 cpu_loop(env);
1131 /* never exits */
1132 return 0;
1133 }
AR7 emulation for QEMU