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vnc: factor out vnc_desktop_resize()
[qemu/kraxel.git] / darwin-user / main.c
blob175e12f968412582a0aac85deb636303167cec2a
1 /*
2 * qemu user main
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 * Copyright (c) 2006 Pierre d'Herbemont
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, see <http://www.gnu.org/licenses/>.
19 */
20 #include <stdlib.h>
21 #include <stdio.h>
22 #include <stdarg.h>
23 #include <string.h>
24 #include <errno.h>
25 #include <unistd.h>
26
27 #include <sys/syscall.h>
28 #include <sys/mman.h>
29
30 #include "qemu.h"
31
32 #define DEBUG_LOGFILE "/tmp/qemu.log"
33
34 #ifdef __APPLE__
35 #include <crt_externs.h>
36 # define environ (*_NSGetEnviron())
37 #endif
38
39 #include <mach/mach_init.h>
40 #include <mach/vm_map.h>
41
42 int singlestep;
43
44 const char *interp_prefix = "";
45
46 asm(".zerofill __STD_PROG_ZONE, __STD_PROG_ZONE, __std_prog_zone, 0x0dfff000");
47
48 /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
49 we allocate a bigger stack. Need a better solution, for example
50 by remapping the process stack directly at the right place */
51 unsigned long stack_size = 512 * 1024;
52
53 void qerror(const char *fmt, ...)
54 {
55 va_list ap;
56
57 va_start(ap, fmt);
58 vfprintf(stderr, fmt, ap);
59 va_end(ap);
60 fprintf(stderr, "\n");
61 exit(1);
62 }
63
64 void gemu_log(const char *fmt, ...)
65 {
66 va_list ap;
67
68 va_start(ap, fmt);
69 vfprintf(stderr, fmt, ap);
70 va_end(ap);
71 }
72
73 int cpu_get_pic_interrupt(CPUState *env)
74 {
75 return -1;
76 }
77 #ifdef TARGET_PPC
78
79 static inline uint64_t cpu_ppc_get_tb (CPUState *env)
80 {
81 /* TO FIX */
82 return 0;
83 }
84
85 uint64_t cpu_ppc_load_tbl (CPUState *env)
86 {
87 return cpu_ppc_get_tb(env);
88 }
89
90 uint32_t cpu_ppc_load_tbu (CPUState *env)
91 {
92 return cpu_ppc_get_tb(env) >> 32;
93 }
94
95 uint64_t cpu_ppc_load_atbl (CPUState *env)
96 {
97 return cpu_ppc_get_tb(env);
98 }
99
100 uint32_t cpu_ppc_load_atbu (CPUState *env)
101 {
102 return cpu_ppc_get_tb(env) >> 32;
103 }
104
105 uint32_t cpu_ppc601_load_rtcu (CPUState *env)
106 {
107 cpu_ppc_load_tbu(env);
108 }
109
110 uint32_t cpu_ppc601_load_rtcl (CPUState *env)
111 {
112 return cpu_ppc_load_tbl(env) & 0x3FFFFF80;
113 }
114
115 /* XXX: to be fixed */
116 int ppc_dcr_read (ppc_dcr_t *dcr_env, int dcrn, uint32_t *valp)
117 {
118 return -1;
119 }
120
121 int ppc_dcr_write (ppc_dcr_t *dcr_env, int dcrn, uint32_t val)
122 {
123 return -1;
124 }
125
126 #define EXCP_DUMP(env, fmt, ...) \
127 do { \
128 fprintf(stderr, fmt , ## __VA_ARGS__); \
129 cpu_dump_state(env, stderr, fprintf, 0); \
130 qemu_log(fmt, ## __VA_ARGS__); \
131 log_cpu_state(env, 0); \
132 } while (0)
133
134 void cpu_loop(CPUPPCState *env)
135 {
136 int trapnr;
137 uint32_t ret;
138 target_siginfo_t info;
139
140 for(;;) {
141 trapnr = cpu_ppc_exec(env);
142 switch(trapnr) {
143 case POWERPC_EXCP_NONE:
144 /* Just go on */
145 break;
146 case POWERPC_EXCP_CRITICAL: /* Critical input */
147 cpu_abort(env, "Critical interrupt while in user mode. "
148 "Aborting\n");
149 break;
150 case POWERPC_EXCP_MCHECK: /* Machine check exception */
151 cpu_abort(env, "Machine check exception while in user mode. "
152 "Aborting\n");
153 break;
154 case POWERPC_EXCP_DSI: /* Data storage exception */
155 #ifndef DAR
156 /* To deal with multiple qemu header version as host for the darwin-user code */
157 # define DAR SPR_DAR
158 #endif
159 EXCP_DUMP(env, "Invalid data memory access: 0x" TARGET_FMT_lx "\n",
160 env->spr[SPR_DAR]);
161 /* Handle this via the gdb */
162 gdb_handlesig (env, SIGSEGV);
163
164 info.si_addr = (void*)env->nip;
165 queue_signal(info.si_signo, &info);
166 break;
167 case POWERPC_EXCP_ISI: /* Instruction storage exception */
168 EXCP_DUMP(env, "Invalid instruction fetch: 0x\n" TARGET_FMT_lx "\n",
169 env->spr[SPR_DAR]);
170 /* Handle this via the gdb */
171 gdb_handlesig (env, SIGSEGV);
172
173 info.si_addr = (void*)(env->nip - 4);
174 queue_signal(info.si_signo, &info);
175 break;
176 case POWERPC_EXCP_EXTERNAL: /* External input */
177 cpu_abort(env, "External interrupt while in user mode. "
178 "Aborting\n");
179 break;
180 case POWERPC_EXCP_ALIGN: /* Alignment exception */
181 EXCP_DUMP(env, "Unaligned memory access\n");
182 info.si_errno = 0;
183 info.si_code = BUS_ADRALN;
184 info.si_addr = (void*)(env->nip - 4);
185 queue_signal(info.si_signo, &info);
186 break;
187 case POWERPC_EXCP_PROGRAM: /* Program exception */
188 /* XXX: check this */
189 switch (env->error_code & ~0xF) {
190 case POWERPC_EXCP_FP:
191 EXCP_DUMP(env, "Floating point program exception\n");
192 /* Set FX */
193 info.si_signo = SIGFPE;
194 info.si_errno = 0;
195 switch (env->error_code & 0xF) {
196 case POWERPC_EXCP_FP_OX:
197 info.si_code = FPE_FLTOVF;
198 break;
199 case POWERPC_EXCP_FP_UX:
200 info.si_code = FPE_FLTUND;
201 break;
202 case POWERPC_EXCP_FP_ZX:
203 case POWERPC_EXCP_FP_VXZDZ:
204 info.si_code = FPE_FLTDIV;
205 break;
206 case POWERPC_EXCP_FP_XX:
207 info.si_code = FPE_FLTRES;
208 break;
209 case POWERPC_EXCP_FP_VXSOFT:
210 info.si_code = FPE_FLTINV;
211 break;
212 case POWERPC_EXCP_FP_VXSNAN:
213 case POWERPC_EXCP_FP_VXISI:
214 case POWERPC_EXCP_FP_VXIDI:
215 case POWERPC_EXCP_FP_VXIMZ:
216 case POWERPC_EXCP_FP_VXVC:
217 case POWERPC_EXCP_FP_VXSQRT:
218 case POWERPC_EXCP_FP_VXCVI:
219 info.si_code = FPE_FLTSUB;
220 break;
221 default:
222 EXCP_DUMP(env, "Unknown floating point exception (%02x)\n",
223 env->error_code);
224 break;
225 }
226 break;
227 case POWERPC_EXCP_INVAL:
228 EXCP_DUMP(env, "Invalid instruction\n");
229 info.si_signo = SIGILL;
230 info.si_errno = 0;
231 switch (env->error_code & 0xF) {
232 case POWERPC_EXCP_INVAL_INVAL:
233 info.si_code = ILL_ILLOPC;
234 break;
235 case POWERPC_EXCP_INVAL_LSWX:
236 info.si_code = ILL_ILLOPN;
237 break;
238 case POWERPC_EXCP_INVAL_SPR:
239 info.si_code = ILL_PRVREG;
240 break;
241 case POWERPC_EXCP_INVAL_FP:
242 info.si_code = ILL_COPROC;
243 break;
244 default:
245 EXCP_DUMP(env, "Unknown invalid operation (%02x)\n",
246 env->error_code & 0xF);
247 info.si_code = ILL_ILLADR;
248 break;
249 }
250 /* Handle this via the gdb */
251 gdb_handlesig (env, SIGSEGV);
252 break;
253 case POWERPC_EXCP_PRIV:
254 EXCP_DUMP(env, "Privilege violation\n");
255 info.si_signo = SIGILL;
256 info.si_errno = 0;
257 switch (env->error_code & 0xF) {
258 case POWERPC_EXCP_PRIV_OPC:
259 info.si_code = ILL_PRVOPC;
260 break;
261 case POWERPC_EXCP_PRIV_REG:
262 info.si_code = ILL_PRVREG;
263 break;
264 default:
265 EXCP_DUMP(env, "Unknown privilege violation (%02x)\n",
266 env->error_code & 0xF);
267 info.si_code = ILL_PRVOPC;
268 break;
269 }
270 break;
271 case POWERPC_EXCP_TRAP:
272 cpu_abort(env, "Tried to call a TRAP\n");
273 break;
274 default:
275 /* Should not happen ! */
276 cpu_abort(env, "Unknown program exception (%02x)\n",
277 env->error_code);
278 break;
279 }
280 info.si_addr = (void*)(env->nip - 4);
281 queue_signal(info.si_signo, &info);
282 break;
283 case POWERPC_EXCP_FPU: /* Floating-point unavailable exception */
284 EXCP_DUMP(env, "No floating point allowed\n");
285 info.si_signo = SIGILL;
286 info.si_errno = 0;
287 info.si_code = ILL_COPROC;
288 info.si_addr = (void*)(env->nip - 4);
289 queue_signal(info.si_signo, &info);
290 break;
291 case POWERPC_EXCP_SYSCALL: /* System call exception */
292 cpu_abort(env, "Syscall exception while in user mode. "
293 "Aborting\n");
294 break;
295 case POWERPC_EXCP_APU: /* Auxiliary processor unavailable */
296 EXCP_DUMP(env, "No APU instruction allowed\n");
297 info.si_signo = SIGILL;
298 info.si_errno = 0;
299 info.si_code = ILL_COPROC;
300 info.si_addr = (void*)(env->nip - 4);
301 queue_signal(info.si_signo, &info);
302 break;
303 case POWERPC_EXCP_DECR: /* Decrementer exception */
304 cpu_abort(env, "Decrementer interrupt while in user mode. "
305 "Aborting\n");
306 break;
307 case POWERPC_EXCP_FIT: /* Fixed-interval timer interrupt */
308 cpu_abort(env, "Fix interval timer interrupt while in user mode. "
309 "Aborting\n");
310 break;
311 case POWERPC_EXCP_WDT: /* Watchdog timer interrupt */
312 cpu_abort(env, "Watchdog timer interrupt while in user mode. "
313 "Aborting\n");
314 break;
315 case POWERPC_EXCP_DTLB: /* Data TLB error */
316 cpu_abort(env, "Data TLB exception while in user mode. "
317 "Aborting\n");
318 break;
319 case POWERPC_EXCP_ITLB: /* Instruction TLB error */
320 cpu_abort(env, "Instruction TLB exception while in user mode. "
321 "Aborting\n");
322 break;
323 case POWERPC_EXCP_DEBUG: /* Debug interrupt */
324 gdb_handlesig (env, SIGTRAP);
325 break;
326 case POWERPC_EXCP_SPEU: /* SPE/embedded floating-point unavail. */
327 EXCP_DUMP(env, "No SPE/floating-point instruction allowed\n");
328 info.si_signo = SIGILL;
329 info.si_errno = 0;
330 info.si_code = ILL_COPROC;
331 info.si_addr = (void*)(env->nip - 4);
332 queue_signal(info.si_signo, &info);
333 break;
334 case POWERPC_EXCP_EFPDI: /* Embedded floating-point data IRQ */
335 cpu_abort(env, "Embedded floating-point data IRQ not handled\n");
336 break;
337 case POWERPC_EXCP_EFPRI: /* Embedded floating-point round IRQ */
338 cpu_abort(env, "Embedded floating-point round IRQ not handled\n");
339 break;
340 case POWERPC_EXCP_EPERFM: /* Embedded performance monitor IRQ */
341 cpu_abort(env, "Performance monitor exception not handled\n");
342 break;
343 case POWERPC_EXCP_DOORI: /* Embedded doorbell interrupt */
344 cpu_abort(env, "Doorbell interrupt while in user mode. "
345 "Aborting\n");
346 break;
347 case POWERPC_EXCP_DOORCI: /* Embedded doorbell critical interrupt */
348 cpu_abort(env, "Doorbell critical interrupt while in user mode. "
349 "Aborting\n");
350 break;
351 case POWERPC_EXCP_RESET: /* System reset exception */
352 cpu_abort(env, "Reset interrupt while in user mode. "
353 "Aborting\n");
354 break;
355 case POWERPC_EXCP_DSEG: /* Data segment exception */
356 cpu_abort(env, "Data segment exception while in user mode. "
357 "Aborting\n");
358 break;
359 case POWERPC_EXCP_ISEG: /* Instruction segment exception */
360 cpu_abort(env, "Instruction segment exception "
361 "while in user mode. Aborting\n");
362 break;
363 case POWERPC_EXCP_HDECR: /* Hypervisor decrementer exception */
364 cpu_abort(env, "Hypervisor decrementer interrupt "
365 "while in user mode. Aborting\n");
366 break;
367 case POWERPC_EXCP_TRACE: /* Trace exception */
368 /* Nothing to do:
369 * we use this exception to emulate step-by-step execution mode.
370 */
371 break;
372 case POWERPC_EXCP_HDSI: /* Hypervisor data storage exception */
373 cpu_abort(env, "Hypervisor data storage exception "
374 "while in user mode. Aborting\n");
375 break;
376 case POWERPC_EXCP_HISI: /* Hypervisor instruction storage excp */
377 cpu_abort(env, "Hypervisor instruction storage exception "
378 "while in user mode. Aborting\n");
379 break;
380 case POWERPC_EXCP_HDSEG: /* Hypervisor data segment exception */
381 cpu_abort(env, "Hypervisor data segment exception "
382 "while in user mode. Aborting\n");
383 break;
384 case POWERPC_EXCP_HISEG: /* Hypervisor instruction segment excp */
385 cpu_abort(env, "Hypervisor instruction segment exception "
386 "while in user mode. Aborting\n");
387 break;
388 case POWERPC_EXCP_VPU: /* Vector unavailable exception */
389 EXCP_DUMP(env, "No Altivec instructions allowed\n");
390 info.si_signo = SIGILL;
391 info.si_errno = 0;
392 info.si_code = ILL_COPROC;
393 info.si_addr = (void*)(env->nip - 4);
394 queue_signal(info.si_signo, &info);
395 break;
396 case POWERPC_EXCP_PIT: /* Programmable interval timer IRQ */
397 cpu_abort(env, "Programable interval timer interrupt "
398 "while in user mode. Aborting\n");
399 break;
400 case POWERPC_EXCP_IO: /* IO error exception */
401 cpu_abort(env, "IO error exception while in user mode. "
402 "Aborting\n");
403 break;
404 case POWERPC_EXCP_RUNM: /* Run mode exception */
405 cpu_abort(env, "Run mode exception while in user mode. "
406 "Aborting\n");
407 break;
408 case POWERPC_EXCP_EMUL: /* Emulation trap exception */
409 cpu_abort(env, "Emulation trap exception not handled\n");
410 break;
411 case POWERPC_EXCP_IFTLB: /* Instruction fetch TLB error */
412 cpu_abort(env, "Instruction fetch TLB exception "
413 "while in user-mode. Aborting");
414 break;
415 case POWERPC_EXCP_DLTLB: /* Data load TLB miss */
416 cpu_abort(env, "Data load TLB exception while in user-mode. "
417 "Aborting");
418 break;
419 case POWERPC_EXCP_DSTLB: /* Data store TLB miss */
420 cpu_abort(env, "Data store TLB exception while in user-mode. "
421 "Aborting");
422 break;
423 case POWERPC_EXCP_FPA: /* Floating-point assist exception */
424 cpu_abort(env, "Floating-point assist exception not handled\n");
425 break;
426 case POWERPC_EXCP_IABR: /* Instruction address breakpoint */
427 cpu_abort(env, "Instruction address breakpoint exception "
428 "not handled\n");
429 break;
430 case POWERPC_EXCP_SMI: /* System management interrupt */
431 cpu_abort(env, "System management interrupt while in user mode. "
432 "Aborting\n");
433 break;
434 case POWERPC_EXCP_THERM: /* Thermal interrupt */
435 cpu_abort(env, "Thermal interrupt interrupt while in user mode. "
436 "Aborting\n");
437 break;
438 case POWERPC_EXCP_PERFM: /* Embedded performance monitor IRQ */
439 cpu_abort(env, "Performance monitor exception not handled\n");
440 break;
441 case POWERPC_EXCP_VPUA: /* Vector assist exception */
442 cpu_abort(env, "Vector assist exception not handled\n");
443 break;
444 case POWERPC_EXCP_SOFTP: /* Soft patch exception */
445 cpu_abort(env, "Soft patch exception not handled\n");
446 break;
447 case POWERPC_EXCP_MAINT: /* Maintenance exception */
448 cpu_abort(env, "Maintenance exception while in user mode. "
449 "Aborting\n");
450 break;
451 case POWERPC_EXCP_STOP: /* stop translation */
452 /* We did invalidate the instruction cache. Go on */
453 break;
454 case POWERPC_EXCP_BRANCH: /* branch instruction: */
455 /* We just stopped because of a branch. Go on */
456 break;
457 case POWERPC_EXCP_SYSCALL_USER:
458 /* system call in user-mode emulation */
459 /* system call */
460 if(((int)env->gpr[0]) <= SYS_MAXSYSCALL && ((int)env->gpr[0])>0)
461 ret = do_unix_syscall(env, env->gpr[0]/*, env->gpr[3], env->gpr[4],
462 env->gpr[5], env->gpr[6], env->gpr[7],
463 env->gpr[8], env->gpr[9], env->gpr[10]*/);
464 else if(((int)env->gpr[0])<0)
465 ret = do_mach_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4],
466 env->gpr[5], env->gpr[6], env->gpr[7],
467 env->gpr[8], env->gpr[9], env->gpr[10]);
468 else
469 ret = do_thread_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4],
470 env->gpr[5], env->gpr[6], env->gpr[7],
471 env->gpr[8], env->gpr[9], env->gpr[10]);
472
473 /* Unix syscall error signaling */
474 if(((int)env->gpr[0]) <= SYS_MAXSYSCALL && ((int)env->gpr[0])>0)
475 {
476 if( (int)ret < 0 )
477 env->nip += 0;
478 else
479 env->nip += 4;
480 }
481
482 /* Return value */
483 env->gpr[3] = ret;
484 break;
485 case EXCP_INTERRUPT:
486 /* just indicate that signals should be handled asap */
487 break;
488 default:
489 cpu_abort(env, "Unknown exception 0x%d. Aborting\n", trapnr);
490 break;
491 }
492 process_pending_signals(env);
493 }
494 }
495 #endif
496
497
498 #ifdef TARGET_I386
499
500 /***********************************************************/
501 /* CPUX86 core interface */
502
503 uint64_t cpu_get_tsc(CPUX86State *env)
504 {
505 return cpu_get_real_ticks();
506 }
507
508 void
509 write_dt(void *ptr, unsigned long addr, unsigned long limit,
510 int flags)
511 {
512 unsigned int e1, e2;
513 e1 = (addr << 16) | (limit & 0xffff);
514 e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
515 e2 |= flags;
516 stl((uint8_t *)ptr, e1);
517 stl((uint8_t *)ptr + 4, e2);
518 }
519
520 static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
521 unsigned long addr, unsigned int sel)
522 {
523 unsigned int e1, e2;
524 e1 = (addr & 0xffff) | (sel << 16);
525 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
526 stl((uint8_t *)ptr, e1);
527 stl((uint8_t *)ptr + 4, e2);
528 }
529
530 #define GDT_TABLE_SIZE 14
531 #define LDT_TABLE_SIZE 15
532 #define IDT_TABLE_SIZE 256
533 #define TSS_SIZE 104
534 uint64_t gdt_table[GDT_TABLE_SIZE];
535 uint64_t ldt_table[LDT_TABLE_SIZE];
536 uint64_t idt_table[IDT_TABLE_SIZE];
537 uint32_t tss[TSS_SIZE];
538
539 /* only dpl matters as we do only user space emulation */
540 static void set_idt(int n, unsigned int dpl)
541 {
542 set_gate(idt_table + n, 0, dpl, 0, 0);
543 }
544
545 /* ABI convention: after a syscall if there was an error the CF flag is set */
546 static inline void set_error(CPUX86State *env, int ret)
547 {
548 if(ret<0)
549 env->eflags = env->eflags | 0x1;
550 else
551 env->eflags &= ~0x1;
552 env->regs[R_EAX] = ret;
553 }
554
555 void cpu_loop(CPUX86State *env)
556 {
557 int trapnr;
558 int ret;
559 uint8_t *pc;
560 target_siginfo_t info;
561
562 for(;;) {
563 trapnr = cpu_x86_exec(env);
564 uint32_t *params = (uint32_t *)env->regs[R_ESP];
565 switch(trapnr) {
566 case 0x79: /* Our commpage hack back door exit is here */
567 do_commpage(env, env->eip, *(params + 1), *(params + 2),
568 *(params + 3), *(params + 4),
569 *(params + 5), *(params + 6),
570 *(params + 7), *(params + 8));
571 break;
572 case 0x81: /* mach syscall */
573 {
574 ret = do_mach_syscall(env, env->regs[R_EAX],
575 *(params + 1), *(params + 2),
576 *(params + 3), *(params + 4),
577 *(params + 5), *(params + 6),
578 *(params + 7), *(params + 8));
579 set_error(env, ret);
580 break;
581 }
582 case 0x90: /* unix backdoor */
583 {
584 /* after sysenter, stack is in R_ECX, new eip in R_EDX (sysexit will flip them back)*/
585 int saved_stack = env->regs[R_ESP];
586 env->regs[R_ESP] = env->regs[R_ECX];
587
588 ret = do_unix_syscall(env, env->regs[R_EAX]);
589
590 env->regs[R_ECX] = env->regs[R_ESP];
591 env->regs[R_ESP] = saved_stack;
592
593 set_error(env, ret);
594 break;
595 }
596 case 0x80: /* unix syscall */
597 {
598 ret = do_unix_syscall(env, env->regs[R_EAX]/*,
599 *(params + 1), *(params + 2),
600 *(params + 3), *(params + 4),
601 *(params + 5), *(params + 6),
602 *(params + 7), *(params + 8)*/);
603 set_error(env, ret);
604 break;
605 }
606 case 0x82: /* thread syscall */
607 {
608 ret = do_thread_syscall(env, env->regs[R_EAX],
609 *(params + 1), *(params + 2),
610 *(params + 3), *(params + 4),
611 *(params + 5), *(params + 6),
612 *(params + 7), *(params + 8));
613 set_error(env, ret);
614 break;
615 }
616 case EXCP0B_NOSEG:
617 case EXCP0C_STACK:
618 info.si_signo = SIGBUS;
619 info.si_errno = 0;
620 info.si_code = BUS_NOOP;
621 info.si_addr = 0;
622 gdb_handlesig (env, SIGBUS);
623 queue_signal(info.si_signo, &info);
624 break;
625 case EXCP0D_GPF:
626 info.si_signo = SIGSEGV;
627 info.si_errno = 0;
628 info.si_code = SEGV_NOOP;
629 info.si_addr = 0;
630 gdb_handlesig (env, SIGSEGV);
631 queue_signal(info.si_signo, &info);
632 break;
633 case EXCP0E_PAGE:
634 info.si_signo = SIGSEGV;
635 info.si_errno = 0;
636 if (!(env->error_code & 1))
637 info.si_code = SEGV_MAPERR;
638 else
639 info.si_code = SEGV_ACCERR;
640 info.si_addr = (void*)env->cr[2];
641 gdb_handlesig (env, SIGSEGV);
642 queue_signal(info.si_signo, &info);
643 break;
644 case EXCP00_DIVZ:
645 /* division by zero */
646 info.si_signo = SIGFPE;
647 info.si_errno = 0;
648 info.si_code = FPE_INTDIV;
649 info.si_addr = (void*)env->eip;
650 gdb_handlesig (env, SIGFPE);
651 queue_signal(info.si_signo, &info);
652 break;
653 case EXCP01_SSTP:
654 case EXCP03_INT3:
655 info.si_signo = SIGTRAP;
656 info.si_errno = 0;
657 info.si_code = TRAP_BRKPT;
658 info.si_addr = (void*)env->eip;
659 gdb_handlesig (env, SIGTRAP);
660 queue_signal(info.si_signo, &info);
661 break;
662 case EXCP04_INTO:
663 case EXCP05_BOUND:
664 info.si_signo = SIGSEGV;
665 info.si_errno = 0;
666 info.si_code = SEGV_NOOP;
667 info.si_addr = 0;
668 gdb_handlesig (env, SIGSEGV);
669 queue_signal(info.si_signo, &info);
670 break;
671 case EXCP06_ILLOP:
672 info.si_signo = SIGILL;
673 info.si_errno = 0;
674 info.si_code = ILL_ILLOPN;
675 info.si_addr = (void*)env->eip;
676 gdb_handlesig (env, SIGILL);
677 queue_signal(info.si_signo, &info);
678 break;
679 case EXCP_INTERRUPT:
680 /* just indicate that signals should be handled asap */
681 break;
682 case EXCP_DEBUG:
683 {
684 int sig;
685
686 sig = gdb_handlesig (env, SIGTRAP);
687 if (sig)
688 {
689 info.si_signo = sig;
690 info.si_errno = 0;
691 info.si_code = TRAP_BRKPT;
692 queue_signal(info.si_signo, &info);
693 }
694 }
695 break;
696 default:
697 pc = (void*)(env->segs[R_CS].base + env->eip);
698 fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
699 (long)pc, trapnr);
700 abort();
701 }
702 process_pending_signals(env);
703 }
704 }
705 #endif
706
707 static void usage(void)
708 {
709 printf("qemu-" TARGET_ARCH " version " QEMU_VERSION ", Copyright (c) 2003-2004 Fabrice Bellard\n"
710 "usage: qemu-" TARGET_ARCH " [-h] [-d opts] [-L path] [-s size] program [arguments...]\n"
711 "Darwin CPU emulator (compiled for %s emulation)\n"
712 "\n"
713 "-h print this help\n"
714 "-L path set the %s library path (default='%s')\n"
715 "-s size set the stack size in bytes (default=%ld)\n"
716 "\n"
717 "debug options:\n"
718 "-d options activate log (logfile='%s')\n"
719 "-g wait for gdb on port 1234\n"
720 "-p pagesize set the host page size to 'pagesize'\n",
721 "-singlestep always run in singlestep mode\n"
722 TARGET_ARCH,
723 TARGET_ARCH,
724 interp_prefix,
725 stack_size,
726 DEBUG_LOGFILE);
727 exit(1);
728 }
729
730 /* XXX: currently only used for async signals (see signal.c) */
731 CPUState *global_env;
732 /* used only if single thread */
733 CPUState *cpu_single_env = NULL;
734
735 /* used to free thread contexts */
736 TaskState *first_task_state;
737
738 int main(int argc, char **argv)
739 {
740 const char *filename;
741 struct target_pt_regs regs1, *regs = &regs1;
742 TaskState ts1, *ts = &ts1;
743 CPUState *env;
744 int optind;
745 short use_gdbstub = 0;
746 const char *r;
747 const char *cpu_model;
748
749 if (argc <= 1)
750 usage();
751
752 /* init debug */
753 cpu_set_log_filename(DEBUG_LOGFILE);
754
755 optind = 1;
756 for(;;) {
757 if (optind >= argc)
758 break;
759 r = argv[optind];
760 if (r[0] != '-')
761 break;
762 optind++;
763 r++;
764 if (!strcmp(r, "-")) {
765 break;
766 } else if (!strcmp(r, "d")) {
767 int mask;
768 CPULogItem *item;
769
770 if (optind >= argc)
771 break;
772
773 r = argv[optind++];
774 mask = cpu_str_to_log_mask(r);
775 if (!mask) {
776 printf("Log items (comma separated):\n");
777 for(item = cpu_log_items; item->mask != 0; item++) {
778 printf("%-10s %s\n", item->name, item->help);
779 }
780 exit(1);
781 }
782 cpu_set_log(mask);
783 } else if (!strcmp(r, "s")) {
784 r = argv[optind++];
785 stack_size = strtol(r, (char **)&r, 0);
786 if (stack_size <= 0)
787 usage();
788 if (*r == 'M')
789 stack_size *= 1024 * 1024;
790 else if (*r == 'k' || *r == 'K')
791 stack_size *= 1024;
792 } else if (!strcmp(r, "L")) {
793 interp_prefix = argv[optind++];
794 } else if (!strcmp(r, "p")) {
795 qemu_host_page_size = atoi(argv[optind++]);
796 if (qemu_host_page_size == 0 ||
797 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
798 fprintf(stderr, "page size must be a power of two\n");
799 exit(1);
800 }
801 } else
802 if (!strcmp(r, "g")) {
803 use_gdbstub = 1;
804 } else if (!strcmp(r, "cpu")) {
805 cpu_model = argv[optind++];
806 if (strcmp(cpu_model, "?") == 0) {
807 /* XXX: implement xxx_cpu_list for targets that still miss it */
808 #if defined(cpu_list)
809 cpu_list(stdout, &fprintf);
810 #endif
811 exit(1);
812 }
813 } else if (!strcmp(r, "singlestep")) {
814 singlestep = 1;
815 } else
816 {
817 usage();
818 }
819 }
820 if (optind >= argc)
821 usage();
822 filename = argv[optind];
823
824 /* Zero out regs */
825 memset(regs, 0, sizeof(struct target_pt_regs));
826
827 if (cpu_model == NULL) {
828 #if defined(TARGET_I386)
829 #ifdef TARGET_X86_64
830 cpu_model = "qemu64";
831 #else
832 cpu_model = "qemu32";
833 #endif
834 #elif defined(TARGET_PPC)
835 #ifdef TARGET_PPC64
836 cpu_model = "970";
837 #else
838 cpu_model = "750";
839 #endif
840 #else
841 #error unsupported CPU
842 #endif
843 }
844
845 cpu_exec_init_all(0);
846 /* NOTE: we need to init the CPU at this stage to get
847 qemu_host_page_size */
848 env = cpu_init(cpu_model);
849 cpu_reset(env);
850
851 printf("Starting %s with qemu\n----------------\n", filename);
852
853 commpage_init();
854
855 if (mach_exec(filename, argv+optind, environ, regs) != 0) {
856 printf("Error loading %s\n", filename);
857 _exit(1);
858 }
859
860 syscall_init();
861 signal_init();
862 global_env = env;
863
864 /* build Task State */
865 memset(ts, 0, sizeof(TaskState));
866 env->opaque = ts;
867 ts->used = 1;
868
869 #if defined(TARGET_I386)
870 cpu_x86_set_cpl(env, 3);
871
872 env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
873 env->hflags |= HF_PE_MASK;
874
875 if (env->cpuid_features & CPUID_SSE) {
876 env->cr[4] |= CR4_OSFXSR_MASK;
877 env->hflags |= HF_OSFXSR_MASK;
878 }
879
880 /* flags setup : we activate the IRQs by default as in user mode */
881 env->eflags |= IF_MASK;
882
883 /* darwin register setup */
884 env->regs[R_EAX] = regs->eax;
885 env->regs[R_EBX] = regs->ebx;
886 env->regs[R_ECX] = regs->ecx;
887 env->regs[R_EDX] = regs->edx;
888 env->regs[R_ESI] = regs->esi;
889 env->regs[R_EDI] = regs->edi;
890 env->regs[R_EBP] = regs->ebp;
891 env->regs[R_ESP] = regs->esp;
892 env->eip = regs->eip;
893
894 /* Darwin LDT setup */
895 /* 2 - User code segment
896 3 - User data segment
897 4 - User cthread */
898 bzero(ldt_table, LDT_TABLE_SIZE * sizeof(ldt_table[0]));
899 env->ldt.base = (uint32_t) ldt_table;
900 env->ldt.limit = sizeof(ldt_table) - 1;
901
902 write_dt(ldt_table + 2, 0, 0xfffff,
903 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
904 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
905 write_dt(ldt_table + 3, 0, 0xfffff,
906 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
907 (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
908 write_dt(ldt_table + 4, 0, 0xfffff,
909 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
910 (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
911
912 /* Darwin GDT setup.
913 * has changed a lot between old Darwin/x86 (pre-Mac Intel) and Mac OS X/x86,
914 now everything is done via int 0x81(mach) int 0x82 (thread) and sysenter/sysexit(unix) */
915 bzero(gdt_table, sizeof(gdt_table));
916 env->gdt.base = (uint32_t)gdt_table;
917 env->gdt.limit = sizeof(gdt_table) - 1;
918
919 /* Set up a back door to handle sysenter syscalls (unix) */
920 char * syscallbackdoor = malloc(64);
921 page_set_flags((int)syscallbackdoor, (int)syscallbackdoor + 64, PROT_EXEC | PROT_READ | PAGE_VALID);
922
923 int i = 0;
924 syscallbackdoor[i++] = 0xcd;
925 syscallbackdoor[i++] = 0x90; /* int 0x90 */
926 syscallbackdoor[i++] = 0x0F;
927 syscallbackdoor[i++] = 0x35; /* sysexit */
928
929 /* Darwin sysenter/sysexit setup */
930 env->sysenter_cs = 0x1; //XXX
931 env->sysenter_eip = (int)syscallbackdoor;
932 env->sysenter_esp = (int)malloc(64);
933
934 /* Darwin TSS setup
935 This must match up with GDT[4] */
936 env->tr.base = (uint32_t) tss;
937 env->tr.limit = sizeof(tss) - 1;
938 env->tr.flags = DESC_P_MASK | (0x9 << DESC_TYPE_SHIFT);
939 stw(tss + 2, 0x10); // ss0 = 0x10 = GDT[2] = Kernel Data Segment
940
941 /* Darwin interrupt setup */
942 bzero(idt_table, sizeof(idt_table));
943 env->idt.base = (uint32_t) idt_table;
944 env->idt.limit = sizeof(idt_table) - 1;
945 set_idt(0, 0);
946 set_idt(1, 0);
947 set_idt(2, 0);
948 set_idt(3, 3);
949 set_idt(4, 3);
950 set_idt(5, 3);
951 set_idt(6, 0);
952 set_idt(7, 0);
953 set_idt(8, 0);
954 set_idt(9, 0);
955 set_idt(10, 0);
956 set_idt(11, 0);
957 set_idt(12, 0);
958 set_idt(13, 0);
959 set_idt(14, 0);
960 set_idt(15, 0);
961 set_idt(16, 0);
962 set_idt(17, 0);
963 set_idt(18, 0);
964 set_idt(19, 0);
965 /* Syscalls are done via
966 int 0x80 (unix) (rarely used)
967 int 0x81 (mach)
968 int 0x82 (thread)
969 int 0x83 (diag) (not handled here)
970 sysenter/sysexit (unix) -> we redirect that to int 0x90 */
971 set_idt(0x79, 3); /* Commpage hack, here is our backdoor interrupt */
972 set_idt(0x80, 3); /* Unix Syscall */
973 set_idt(0x81, 3); /* Mach Syscalls */
974 set_idt(0x82, 3); /* thread Syscalls */
975
976 set_idt(0x90, 3); /* qemu-darwin-user's Unix syscalls backdoor */
977
978
979 cpu_x86_load_seg(env, R_CS, __USER_CS);
980 cpu_x86_load_seg(env, R_DS, __USER_DS);
981 cpu_x86_load_seg(env, R_ES, __USER_DS);
982 cpu_x86_load_seg(env, R_SS, __USER_DS);
983 cpu_x86_load_seg(env, R_FS, __USER_DS);
984 cpu_x86_load_seg(env, R_GS, __USER_DS);
985
986 #elif defined(TARGET_PPC)
987 {
988 int i;
989
990 #if defined(TARGET_PPC64)
991 #if defined(TARGET_ABI32)
992 env->msr &= ~((target_ulong)1 << MSR_SF);
993 #else
994 env->msr |= (target_ulong)1 << MSR_SF;
995 #endif
996 #endif
997 env->nip = regs->nip;
998 for(i = 0; i < 32; i++) {
999 env->gpr[i] = regs->gpr[i];
1000 }
1001 }
1002 #else
1003 #error unsupported target CPU
1004 #endif
1005
1006 if (use_gdbstub) {
1007 printf("Waiting for gdb Connection on port 1234...\n");
1008 gdbserver_start (1234);
1009 gdb_handlesig(env, 0);
1010 }
1011
1012 cpu_loop(env);
1013 /* never exits */
1014 return 0;
1015 }
kraxel's qemu bits