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Darwin userspace emulation, by Pierre d'Herbemont.
[qemu.git] / darwin-user / main.c
CommitLineData
831b7825
TS		 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, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21#include <stdlib.h>
22#include <stdio.h>
23#include <stdarg.h>
24#include <string.h>
25#include <errno.h>
26#include <unistd.h>
27
28#include <sys/syscall.h>
29#include <sys/mman.h>
30
31#include "qemu.h"
32
33#define DEBUG_LOGFILE "/tmp/qemu.log"
34
35#ifdef __APPLE__
36#include <crt_externs.h>
37# define environ (*_NSGetEnviron())
38#endif
39
40#include <mach/mach_init.h>
41#include <mach/vm_map.h>
42
43const char *interp_prefix = "";
44
45asm(".zerofill __STD_PROG_ZONE, __STD_PROG_ZONE, __std_prog_zone, 0x0dfff000");
46
47/* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
48 we allocate a bigger stack. Need a better solution, for example
49 by remapping the process stack directly at the right place */
50unsigned long stack_size = 512 * 1024;
51
52void qerror(const char *fmt, ...)
53{
54 va_list ap;
55
56 va_start(ap, fmt);
57 vfprintf(stderr, fmt, ap);
58 va_end(ap);
59 fprintf(stderr, "\n");
60 exit(1);
61}
62
63void gemu_log(const char *fmt, ...)
64{
65 va_list ap;
66
67 va_start(ap, fmt);
68 vfprintf(stderr, fmt, ap);
69 va_end(ap);
70}
71
72void cpu_outb(CPUState *env, int addr, int val)
73{
74 fprintf(stderr, "outb: port=0x%04x, data=%02x\n", addr, val);
75}
76
77void cpu_outw(CPUState *env, int addr, int val)
78{
79 fprintf(stderr, "outw: port=0x%04x, data=%04x\n", addr, val);
80}
81
82void cpu_outl(CPUState *env, int addr, int val)
83{
84 fprintf(stderr, "outl: port=0x%04x, data=%08x\n", addr, val);
85}
86
87int cpu_inb(CPUState *env, int addr)
88{
89 fprintf(stderr, "inb: port=0x%04x\n", addr);
90 return 0;
91}
92
93int cpu_inw(CPUState *env, int addr)
94{
95 fprintf(stderr, "inw: port=0x%04x\n", addr);
96 return 0;
97}
98
99int cpu_inl(CPUState *env, int addr)
100{
101 fprintf(stderr, "inl: port=0x%04x\n", addr);
102 return 0;
103}
104
105int cpu_get_pic_interrupt(CPUState *env)
106{
107 return -1;
108}
109#ifdef TARGET_PPC
110
111static inline uint64_t cpu_ppc_get_tb (CPUState *env)
112{
113 /* TO FIX */
114 return 0;
115}
116
117uint32_t cpu_ppc_load_tbl (CPUState *env)
118{
119 return cpu_ppc_get_tb(env) & 0xFFFFFFFF;
120}
121
122uint32_t cpu_ppc_load_tbu (CPUState *env)
123{
124 return cpu_ppc_get_tb(env) >> 32;
125}
126
127static void cpu_ppc_store_tb (CPUState *env, uint64_t value)
128{
129 /* TO FIX */
130}
131
132void cpu_ppc_store_tbu (CPUState *env, uint32_t value)
133{
134 cpu_ppc_store_tb(env, ((uint64_t)value << 32) | cpu_ppc_load_tbl(env));
135}
136
137void cpu_ppc_store_tbl (CPUState *env, uint32_t value)
138{
139 cpu_ppc_store_tb(env, ((uint64_t)cpu_ppc_load_tbl(env) << 32) | value);
140}
141
142uint32_t cpu_ppc_load_decr (CPUState *env)
143{
144 /* TO FIX */
145 return -1;
146}
147
148void cpu_ppc_store_decr (CPUState *env, uint32_t value)
149{
150 /* TO FIX */
151}
152
153void cpu_loop(CPUPPCState *env)
154{
155 int trapnr;
156 uint32_t ret;
157 target_siginfo_t info;
158
159 for(;;) {
160 trapnr = cpu_ppc_exec(env);
161 if (trapnr != EXCP_SYSCALL_USER && trapnr != EXCP_BRANCH &&
162 trapnr != EXCP_TRACE) {
163 if (loglevel > 0) {
164 cpu_dump_state(env, logfile, fprintf, 0);
165 }
166 }
167 switch(trapnr) {
168 case EXCP_NONE:
169 break;
170 case EXCP_SYSCALL_USER:
171 /* system call */
172 if(((int)env->gpr[0]) <= SYS_MAXSYSCALL && ((int)env->gpr[0])>0)
173 ret = do_unix_syscall(env, env->gpr[0]/*, env->gpr[3], env->gpr[4],
174 env->gpr[5], env->gpr[6], env->gpr[7],
175 env->gpr[8], env->gpr[9], env->gpr[10]*/);
176 else if(((int)env->gpr[0])<0)
177 ret = do_mach_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4],
178 env->gpr[5], env->gpr[6], env->gpr[7],
179 env->gpr[8], env->gpr[9], env->gpr[10]);
180 else
181 ret = do_thread_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4],
182 env->gpr[5], env->gpr[6], env->gpr[7],
183 env->gpr[8], env->gpr[9], env->gpr[10]);
184
185 /* Unix syscall error signaling */
186 if(((int)env->gpr[0]) <= SYS_MAXSYSCALL && ((int)env->gpr[0])>0)
187 {
188 if( (int)ret < 0 )
189 env->nip += 0;
190 else
191 env->nip += 4;
192 }
193
194 /* Return value */
195 env->gpr[3] = ret;
196 break;
197 case EXCP_RESET:
198 /* Should not happen ! */
199 fprintf(stderr, "RESET asked... Stop emulation\n");
200 if (loglevel)
201 fprintf(logfile, "RESET asked... Stop emulation\n");
202 abort();
203 case EXCP_MACHINE_CHECK:
204 fprintf(stderr, "Machine check exeption... Stop emulation\n");
205 if (loglevel)
206 fprintf(logfile, "RESET asked... Stop emulation\n");
207 info.si_signo = SIGBUS;
208 info.si_errno = 0;
209 info.si_code = BUS_OBJERR;
210 info.si_addr = (void*)(env->nip - 4);
211 queue_signal(info.si_signo, &info);
212 case EXCP_DSI:
213#ifndef DAR
214/* To deal with multiple qemu header version as host for the darwin-user code */
215# define DAR SPR_DAR
216#endif
217 fprintf(stderr, "Invalid data memory access: 0x%08x\n", env->spr[DAR]);
218 if (loglevel) {
219 fprintf(logfile, "Invalid data memory access: 0x%08x\n",
220 env->spr[DAR]);
221 }
222 /* Handle this via the gdb */
223 gdb_handlesig (env, SIGSEGV);
224
225 info.si_addr = (void*)env->nip;
226 queue_signal(info.si_signo, &info);
227 break;
228 case EXCP_ISI:
229 fprintf(stderr, "Invalid instruction fetch\n");
230 if (loglevel)
231 fprintf(logfile, "Invalid instruction fetch\n");
232 /* Handle this via the gdb */
233 gdb_handlesig (env, SIGSEGV);
234
235 info.si_addr = (void*)(env->nip - 4);
236 queue_signal(info.si_signo, &info);
237 break;
238 case EXCP_EXTERNAL:
239 /* Should not happen ! */
240 fprintf(stderr, "External interruption... Stop emulation\n");
241 if (loglevel)
242 fprintf(logfile, "External interruption... Stop emulation\n");
243 abort();
244 case EXCP_ALIGN:
245 fprintf(stderr, "Invalid unaligned memory access\n");
246 if (loglevel)
247 fprintf(logfile, "Invalid unaligned memory access\n");
248 info.si_signo = SIGBUS;
249 info.si_errno = 0;
250 info.si_code = BUS_ADRALN;
251 info.si_addr = (void*)(env->nip - 4);
252 queue_signal(info.si_signo, &info);
253 break;
254 case EXCP_PROGRAM:
255 switch (env->error_code & ~0xF) {
256 case EXCP_FP:
257 fprintf(stderr, "Program exception\n");
258 if (loglevel)
259 fprintf(logfile, "Program exception\n");
260 /* Set FX */
261 env->fpscr[7] |= 0x8;
262 /* Finally, update FEX */
263 if ((((env->fpscr[7] & 0x3) << 3) | (env->fpscr[6] >> 1)) &
264 ((env->fpscr[1] << 1) | (env->fpscr[0] >> 3)))
265 env->fpscr[7] |= 0x4;
266 info.si_signo = SIGFPE;
267 info.si_errno = 0;
268 switch (env->error_code & 0xF) {
269 case EXCP_FP_OX:
270 info.si_code = FPE_FLTOVF;
271 break;
272 case EXCP_FP_UX:
273 info.si_code = FPE_FLTUND;
274 break;
275 case EXCP_FP_ZX:
276 case EXCP_FP_VXZDZ:
277 info.si_code = FPE_FLTDIV;
278 break;
279 case EXCP_FP_XX:
280 info.si_code = FPE_FLTRES;
281 break;
282 case EXCP_FP_VXSOFT:
283 info.si_code = FPE_FLTINV;
284 break;
285 case EXCP_FP_VXNAN:
286 case EXCP_FP_VXISI:
287 case EXCP_FP_VXIDI:
288 case EXCP_FP_VXIMZ:
289 case EXCP_FP_VXVC:
290 case EXCP_FP_VXSQRT:
291 case EXCP_FP_VXCVI:
292 info.si_code = FPE_FLTSUB;
293 break;
294 default:
295 fprintf(stderr, "Unknown floating point exception "
296 "(%02x)\n", env->error_code);
297 if (loglevel) {
298 fprintf(logfile, "Unknown floating point exception "
299 "(%02x)\n", env->error_code & 0xF);
300 }
301 }
302 break;
303 case EXCP_INVAL:
304 fprintf(stderr, "Invalid instruction\n");
305 if (loglevel)
306 fprintf(logfile, "Invalid instruction\n");
307 info.si_signo = SIGILL;
308 info.si_errno = 0;
309 switch (env->error_code & 0xF) {
310 case EXCP_INVAL_INVAL:
311 info.si_code = ILL_ILLOPC;
312 break;
313 case EXCP_INVAL_LSWX:
314 info.si_code = ILL_ILLOPN;
315 break;
316 case EXCP_INVAL_SPR:
317 info.si_code = ILL_PRVREG;
318 break;
319 case EXCP_INVAL_FP:
320 info.si_code = ILL_COPROC;
321 break;
322 default:
323 fprintf(stderr, "Unknown invalid operation (%02x)\n",
324 env->error_code & 0xF);
325 if (loglevel) {
326 fprintf(logfile, "Unknown invalid operation (%02x)\n",
327 env->error_code & 0xF);
328 }
329 info.si_code = ILL_ILLADR;
330 break;
331 }
332 /* Handle this via the gdb */
333 gdb_handlesig (env, SIGSEGV);
334 break;
335 case EXCP_PRIV:
336 fprintf(stderr, "Privilege violation\n");
337 if (loglevel)
338 fprintf(logfile, "Privilege violation\n");
339 info.si_signo = SIGILL;
340 info.si_errno = 0;
341 switch (env->error_code & 0xF) {
342 case EXCP_PRIV_OPC:
343 info.si_code = ILL_PRVOPC;
344 break;
345 case EXCP_PRIV_REG:
346 info.si_code = ILL_PRVREG;
347 break;
348 default:
349 fprintf(stderr, "Unknown privilege violation (%02x)\n",
350 env->error_code & 0xF);
351 info.si_code = ILL_PRVOPC;
352 break;
353 }
354 break;
355 case EXCP_TRAP:
356 fprintf(stderr, "Tried to call a TRAP\n");
357 if (loglevel)
358 fprintf(logfile, "Tried to call a TRAP\n");
359 abort();
360 default:
361 /* Should not happen ! */
362 fprintf(stderr, "Unknown program exception (%02x)\n",
363 env->error_code);
364 if (loglevel) {
365 fprintf(logfile, "Unknwon program exception (%02x)\n",
366 env->error_code);
367 }
368 abort();
369 }
370 info.si_addr = (void*)(env->nip - 4);
371 queue_signal(info.si_signo, &info);
372 break;
373 case EXCP_NO_FP:
374 fprintf(stderr, "No floating point allowed\n");
375 if (loglevel)
376 fprintf(logfile, "No floating point allowed\n");
377 info.si_signo = SIGILL;
378 info.si_errno = 0;
379 info.si_code = ILL_COPROC;
380 info.si_addr = (void*)(env->nip - 4);
381 queue_signal(info.si_signo, &info);
382 break;
383 case EXCP_DECR:
384 /* Should not happen ! */
385 fprintf(stderr, "Decrementer exception\n");
386 if (loglevel)
387 fprintf(logfile, "Decrementer exception\n");
388 abort();
389 case EXCP_TRACE:
390 /* Pass to gdb: we use this to trace execution */
391 gdb_handlesig (env, SIGTRAP);
392 break;
393 case EXCP_FP_ASSIST:
394 /* Should not happen ! */
395 fprintf(stderr, "Floating point assist exception\n");
396 if (loglevel)
397 fprintf(logfile, "Floating point assist exception\n");
398 abort();
399 case EXCP_MTMSR:
400 /* We reloaded the msr, just go on */
401 if (msr_pr == 0) {
402 fprintf(stderr, "Tried to go into supervisor mode !\n");
403 if (loglevel)
404 fprintf(logfile, "Tried to go into supervisor mode !\n");
405 abort();
406 }
407 break;
408 case EXCP_BRANCH:
409 /* We stopped because of a jump... */
410 break;
411 case EXCP_INTERRUPT:
412 /* Don't know why this should ever happen... */
413 fprintf(stderr, "EXCP_INTERRUPT\n");
414 break;
415 case EXCP_DEBUG:
416 gdb_handlesig (env, SIGTRAP);
417 break;
418 default:
419 fprintf(stderr, "qemu: unhandled CPU exception 0x%x - aborting\n",
420 trapnr);
421 if (loglevel) {
422 fprintf(logfile, "qemu: unhandled CPU exception 0x%02x - "
423 "0x%02x - aborting\n", trapnr, env->error_code);
424 }
425 abort();
426 }
427 process_pending_signals(env);
428 }
429}
430#endif
431
432
433#ifdef TARGET_I386
434
435/***********************************************************/
436/* CPUX86 core interface */
437
438uint64_t cpu_get_tsc(CPUX86State *env)
439{
440 return cpu_get_real_ticks();
441}
442
443void
444write_dt(void *ptr, unsigned long addr, unsigned long limit,
445 int flags)
446{
447 unsigned int e1, e2;
448 e1 = (addr << 16) | (limit & 0xffff);
449 e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
450 e2 |= flags;
451 stl((uint8_t *)ptr, e1);
452 stl((uint8_t *)ptr + 4, e2);
453}
454
455static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
456 unsigned long addr, unsigned int sel)
457{
458 unsigned int e1, e2;
459 e1 = (addr & 0xffff) | (sel << 16);
460 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
461 stl((uint8_t *)ptr, e1);
462 stl((uint8_t *)ptr + 4, e2);
463}
464
465#define GDT_TABLE_SIZE 14
466#define LDT_TABLE_SIZE 15
467#define IDT_TABLE_SIZE 256
468#define TSS_SIZE 104
469uint64_t gdt_table[GDT_TABLE_SIZE];
470uint64_t ldt_table[LDT_TABLE_SIZE];
471uint64_t idt_table[IDT_TABLE_SIZE];
472uint32_t tss[TSS_SIZE];
473
474/* only dpl matters as we do only user space emulation */
475static void set_idt(int n, unsigned int dpl)
476{
477 set_gate(idt_table + n, 0, dpl, 0, 0);
478}
479
480/* ABI convention: after a syscall if there was an error the CF flag is set */
481static inline set_error(CPUX86State *env, int ret)
482{
483 if(ret<0)
484 env->eflags = env->eflags | 0x1;
485 else
486 env->eflags &= ~0x1;
487 env->regs[R_EAX] = ret;
488}
489
490void cpu_loop(CPUX86State *env)
491{
492 int trapnr;
493 int ret;
494 uint8_t *pc;
495 target_siginfo_t info;
496
497 for(;;) {
498 trapnr = cpu_x86_exec(env);
499 uint32_t *params = (uint32_t *)env->regs[R_ESP];
500 switch(trapnr) {
501 case 0x79: /* Our commpage hack back door exit is here */
502 do_commpage(env, env->eip, *(params + 1), *(params + 2),
503 *(params + 3), *(params + 4),
504 *(params + 5), *(params + 6),
505 *(params + 7), *(params + 8));
506 break;
507 case 0x81: /* mach syscall */
508 {
509 ret = do_mach_syscall(env, env->regs[R_EAX],
510 *(params + 1), *(params + 2),
511 *(params + 3), *(params + 4),
512 *(params + 5), *(params + 6),
513 *(params + 7), *(params + 8));
514 set_error(env, ret);
515 break;
516 }
517 case 0x90: /* unix backdoor */
518 {
519 /* after sysenter, stack is in R_ECX, new eip in R_EDX (sysexit will flip them back)*/
520 int saved_stack = env->regs[R_ESP];
521 env->regs[R_ESP] = env->regs[R_ECX];
522
523 ret = do_unix_syscall(env, env->regs[R_EAX]);
524
525 env->regs[R_ECX] = env->regs[R_ESP];
526 env->regs[R_ESP] = saved_stack;
527
528 set_error(env, ret);
529 break;
530 }
531 case 0x80: /* unix syscall */
532 {
533 ret = do_unix_syscall(env, env->regs[R_EAX]/*,
534 *(params + 1), *(params + 2),
535 *(params + 3), *(params + 4),
536 *(params + 5), *(params + 6),
537 *(params + 7), *(params + 8)*/);
538 set_error(env, ret);
539 break;
540 }
541 case 0x82: /* thread syscall */
542 {
543 ret = do_thread_syscall(env, env->regs[R_EAX],
544 *(params + 1), *(params + 2),
545 *(params + 3), *(params + 4),
546 *(params + 5), *(params + 6),
547 *(params + 7), *(params + 8));
548 set_error(env, ret);
549 break;
550 }
551 case EXCP0B_NOSEG:
552 case EXCP0C_STACK:
553 info.si_signo = SIGBUS;
554 info.si_errno = 0;
555 info.si_code = BUS_NOOP;
556 info.si_addr = 0;
557 gdb_handlesig (env, SIGBUS);
558 queue_signal(info.si_signo, &info);
559 break;
560 case EXCP0D_GPF:
561 info.si_signo = SIGSEGV;
562 info.si_errno = 0;
563 info.si_code = SEGV_NOOP;
564 info.si_addr = 0;
565 gdb_handlesig (env, SIGSEGV);
566 queue_signal(info.si_signo, &info);
567 break;
568 case EXCP0E_PAGE:
569 info.si_signo = SIGSEGV;
570 info.si_errno = 0;
571 if (!(env->error_code & 1))
572 info.si_code = SEGV_MAPERR;
573 else
574 info.si_code = SEGV_ACCERR;
575 info.si_addr = (void*)env->cr[2];
576 gdb_handlesig (env, SIGSEGV);
577 queue_signal(info.si_signo, &info);
578 break;
579 case EXCP00_DIVZ:
580 /* division by zero */
581 info.si_signo = SIGFPE;
582 info.si_errno = 0;
583 info.si_code = FPE_INTDIV;
584 info.si_addr = (void*)env->eip;
585 gdb_handlesig (env, SIGFPE);
586 queue_signal(info.si_signo, &info);
587 break;
588 case EXCP01_SSTP:
589 case EXCP03_INT3:
590 info.si_signo = SIGTRAP;
591 info.si_errno = 0;
592 info.si_code = TRAP_BRKPT;
593 info.si_addr = (void*)env->eip;
594 gdb_handlesig (env, SIGTRAP);
595 queue_signal(info.si_signo, &info);
596 break;
597 case EXCP04_INTO:
598 case EXCP05_BOUND:
599 info.si_signo = SIGSEGV;
600 info.si_errno = 0;
601 info.si_code = SEGV_NOOP;
602 info.si_addr = 0;
603 gdb_handlesig (env, SIGSEGV);
604 queue_signal(info.si_signo, &info);
605 break;
606 case EXCP06_ILLOP:
607 info.si_signo = SIGILL;
608 info.si_errno = 0;
609 info.si_code = ILL_ILLOPN;
610 info.si_addr = (void*)env->eip;
611 gdb_handlesig (env, SIGILL);
612 queue_signal(info.si_signo, &info);
613 break;
614 case EXCP_INTERRUPT:
615 /* just indicate that signals should be handled asap */
616 break;
617 case EXCP_DEBUG:
618 {
619 int sig;
620
621 sig = gdb_handlesig (env, SIGTRAP);
622 if (sig)
623 {
624 info.si_signo = sig;
625 info.si_errno = 0;
626 info.si_code = TRAP_BRKPT;
627 queue_signal(info.si_signo, &info);
628 }
629 }
630 break;
631 default:
632 pc = (void*)(env->segs[R_CS].base + env->eip);
633 fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
634 (long)pc, trapnr);
635 abort();
636 }
637 process_pending_signals(env);
638 }
639}
640#endif
641
642void usage(void)
643{
644 printf("qemu-" TARGET_ARCH " version " QEMU_VERSION ", Copyright (c) 2003-2004 Fabrice Bellard\n"
645 "usage: qemu-" TARGET_ARCH " [-h] [-d opts] [-L path] [-s size] program [arguments...]\n"
646 "Darwin CPU emulator (compiled for %s emulation)\n"
647 "\n"
648 "-h print this help\n"
649 "-L path set the elf interpreter prefix (default=%s)\n"
650 "-s size set the stack size in bytes (default=%ld)\n"
651 "\n"
652 "debug options:\n"
653#ifdef USE_CODE_COPY
654 "-no-code-copy disable code copy acceleration\n"
655#endif
656 "-d options activate log (logfile=%s)\n"
657 "-g wait for gdb on port 1234\n"
658 "-p pagesize set the host page size to 'pagesize'\n",
659 TARGET_ARCH,
660 interp_prefix,
661 stack_size,
662 DEBUG_LOGFILE);
663 _exit(1);
664}
665
666/* XXX: currently only used for async signals (see signal.c) */
667CPUState *global_env;
668/* used only if single thread */
669CPUState *cpu_single_env = NULL;
670
671/* used to free thread contexts */
672TaskState *first_task_state;
673
674int main(int argc, char **argv)
675{
676 const char *filename;
677 struct target_pt_regs regs1, *regs = &regs1;
678 TaskState ts1, *ts = &ts1;
679 CPUState *env;
680 int optind;
681 short use_gdbstub = 0;
682 const char *r;
683
684 if (argc <= 1)
685 usage();
686
687 /* init debug */
688 cpu_set_log_filename(DEBUG_LOGFILE);
689
690 optind = 1;
691 for(;;) {
692 if (optind >= argc)
693 break;
694 r = argv[optind];
695 if (r[0] != '-')
696 break;
697 optind++;
698 r++;
699 if (!strcmp(r, "-")) {
700 break;
701 } else if (!strcmp(r, "d")) {
702 int mask;
703 CPULogItem *item;
704
705 if (optind >= argc)
706 break;
707
708 r = argv[optind++];
709 mask = cpu_str_to_log_mask(r);
710 if (!mask) {
711 printf("Log items (comma separated):\n");
712 for(item = cpu_log_items; item->mask != 0; item++) {
713 printf("%-10s %s\n", item->name, item->help);
714 }
715 exit(1);
716 }
717 cpu_set_log(mask);
718 } else if (!strcmp(r, "s")) {
719 r = argv[optind++];
720 stack_size = strtol(r, (char **)&r, 0);
721 if (stack_size <= 0)
722 usage();
723 if (*r == 'M')
724 stack_size *= 1024 * 1024;
725 else if (*r == 'k' || *r == 'K')
726 stack_size *= 1024;
727 } else if (!strcmp(r, "L")) {
728 interp_prefix = argv[optind++];
729 } else if (!strcmp(r, "p")) {
730 qemu_host_page_size = atoi(argv[optind++]);
731 if (qemu_host_page_size == 0 ||
732 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
733 fprintf(stderr, "page size must be a power of two\n");
734 exit(1);
735 }
736 } else
737 if (!strcmp(r, "g")) {
738 use_gdbstub = 1;
739 } else
740#ifdef USE_CODE_COPY
741 if (!strcmp(r, "no-code-copy")) {
742 code_copy_enabled = 0;
743 } else
744#endif
745 {
746 usage();
747 }
748 }
749 if (optind >= argc)
750 usage();
751 filename = argv[optind];
752
753 /* Zero out regs */
754 memset(regs, 0, sizeof(struct target_pt_regs));
755
756#if 0
757 /* Scan interp_prefix dir for replacement files. */
758 init_paths(interp_prefix);
759#endif
760
761 /* NOTE: we need to init the CPU at this stage to get
762 qemu_host_page_size */
763 env = cpu_init();
764
765 printf("Starting %s with qemu\n----------------\n", filename);
766
767 commpage_init();
768
769 if (mach_exec(filename, argv+optind, environ, regs) != 0) {
770 printf("Error loading %s\n", filename);
771 _exit(1);
772 }
773
774 syscall_init();
775 signal_init();
776 global_env = env;
777
778 /* build Task State */
779 memset(ts, 0, sizeof(TaskState));
780 env->opaque = ts;
781 ts->used = 1;
782 env->user_mode_only = 1;
783
784#if defined(TARGET_I386)
785 cpu_x86_set_cpl(env, 3);
786
787 env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
788 env->hflags |= HF_PE_MASK;
789
790 if (env->cpuid_features & CPUID_SSE) {
791 env->cr[4] |= CR4_OSFXSR_MASK;
792 env->hflags |= HF_OSFXSR_MASK;
793 }
794
795 /* flags setup : we activate the IRQs by default as in user mode */
796 env->eflags |= IF_MASK;
797
798 /* darwin register setup */
799 env->regs[R_EAX] = regs->eax;
800 env->regs[R_EBX] = regs->ebx;
801 env->regs[R_ECX] = regs->ecx;
802 env->regs[R_EDX] = regs->edx;
803 env->regs[R_ESI] = regs->esi;
804 env->regs[R_EDI] = regs->edi;
805 env->regs[R_EBP] = regs->ebp;
806 env->regs[R_ESP] = regs->esp;
807 env->eip = regs->eip;
808
809 /* Darwin LDT setup */
810 /* 2 - User code segment
811 3 - User data segment
812 4 - User cthread */
813 bzero(ldt_table, LDT_TABLE_SIZE * sizeof(ldt_table[0]));
814 env->ldt.base = (uint32_t) ldt_table;
815 env->ldt.limit = sizeof(ldt_table) - 1;
816
817 write_dt(ldt_table + 2, 0, 0xfffff,
818 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
819 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
820 write_dt(ldt_table + 3, 0, 0xfffff,
821 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
822 (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
823 write_dt(ldt_table + 4, 0, 0xfffff,
824 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
825 (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
826
827 /* Darwin GDT setup.
828 * has changed a lot between old Darwin/x86 (pre-Mac Intel) and Mac OS X/x86,
829 now everything is done via int 0x81(mach) int 0x82 (thread) and sysenter/sysexit(unix) */
830 bzero(gdt_table, sizeof(gdt_table));
831 env->gdt.base = (uint32_t)gdt_table;
832 env->gdt.limit = sizeof(gdt_table) - 1;
833
834 /* Set up a back door to handle sysenter syscalls (unix) */
835 char * syscallbackdoor = malloc(64);
836 page_set_flags((int)syscallbackdoor, (int)syscallbackdoor + 64, PROT_EXEC | PROT_READ | PAGE_VALID);
837
838 int i = 0;
839 syscallbackdoor[i++] = 0xcd;
840 syscallbackdoor[i++] = 0x90; /* int 0x90 */
841 syscallbackdoor[i++] = 0x0F;
842 syscallbackdoor[i++] = 0x35; /* sysexit */
843
844 /* Darwin sysenter/sysexit setup */
845 env->sysenter_cs = 0x1; //XXX
846 env->sysenter_eip = (int)syscallbackdoor;
847 env->sysenter_esp = (int)malloc(64);
848
849 /* Darwin TSS setup
850 This must match up with GDT[4] */
851 env->tr.base = (uint32_t) tss;
852 env->tr.limit = sizeof(tss) - 1;
853 env->tr.flags = DESC_P_MASK | (0x9 << DESC_TYPE_SHIFT);
854 stw(tss + 2, 0x10); // ss0 = 0x10 = GDT[2] = Kernel Data Segment
855
856 /* Darwin interrupt setup */
857 bzero(idt_table, sizeof(idt_table));
858 env->idt.base = (uint32_t) idt_table;
859 env->idt.limit = sizeof(idt_table) - 1;
860 set_idt(0, 0);
861 set_idt(1, 0);
862 set_idt(2, 0);
863 set_idt(3, 3);
864 set_idt(4, 3);
865 set_idt(5, 3);
866 set_idt(6, 0);
867 set_idt(7, 0);
868 set_idt(8, 0);
869 set_idt(9, 0);
870 set_idt(10, 0);
871 set_idt(11, 0);
872 set_idt(12, 0);
873 set_idt(13, 0);
874 set_idt(14, 0);
875 set_idt(15, 0);
876 set_idt(16, 0);
877 set_idt(17, 0);
878 set_idt(18, 0);
879 set_idt(19, 0);
880 /* Syscalls are done via
881 int 0x80 (unix) (rarely used)
882 int 0x81 (mach)
883 int 0x82 (thread)
884 int 0x83 (diag) (not handled here)
885 sysenter/sysexit (unix) -> we redirect that to int 0x90 */
886 set_idt(0x79, 3); /* Commpage hack, here is our backdoor interrupt */
887 set_idt(0x80, 3); /* Unix Syscall */
888 set_idt(0x81, 3); /* Mach Syscalls */
889 set_idt(0x82, 3); /* thread Syscalls */
890
891 set_idt(0x90, 3); /* Unix Syscall backdoor */
892
893
894 cpu_x86_load_seg(env, R_CS, __USER_CS);
895 cpu_x86_load_seg(env, R_DS, __USER_DS);
896 cpu_x86_load_seg(env, R_ES, __USER_DS);
897 cpu_x86_load_seg(env, R_SS, __USER_DS);
898 cpu_x86_load_seg(env, R_FS, __USER_DS);
899 cpu_x86_load_seg(env, R_GS, __USER_DS);
900
901#elif defined(TARGET_PPC)
902 {
903 int i;
904 env->nip = regs->nip;
905 for(i = 0; i < 32; i++) {
906 env->gpr[i] = regs->gpr[i];
907 }
908 }
909#else
910#error unsupported target CPU
911#endif
912
913 if (use_gdbstub) {
914 printf("Waiting for gdb Connection on port 1234...\n");
915 gdbserver_start (1234);
916 gdb_handlesig(env, 0);
917 }
918
919 cpu_loop(env);
920 /* never exits */
921 return 0;
922}
Qemu copy for testing