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Implement the PowerPC alternate time-base, following the 2.04 specification.
[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
a062e36c 127uint32_t cpu_ppc_load_atbl (CPUState *env)
831b7825 128{
a062e36c 129 return cpu_ppc_get_tb(env) & 0xFFFFFFFF;
831b7825
TS		 130}
131
a062e36c 132uint32_t cpu_ppc_load_atbu (CPUState *env)
c0009975 133{
a062e36c 134 return cpu_ppc_get_tb(env) >> 32;
c0009975
TS		 135}
136
137uint32_t cpu_ppc601_load_rtcu (CPUState *env)
138{
139 cpu_ppc_load_tbu(env);
140}
141
142uint32_t cpu_ppc601_load_rtcl (CPUState *env)
143{
144 return cpu_ppc_load_tbl(env) & 0x3FFFFF80;
145}
146
e1833e1f
JM		 147/* XXX: to be fixed */
148int ppc_dcr_read (ppc_dcr_t *dcr_env, int dcrn, target_ulong *valp)
149{
150 return -1;
151}
152
153int ppc_dcr_write (ppc_dcr_t *dcr_env, int dcrn, target_ulong val)
154{
155 return -1;
156}
157
158#define EXCP_DUMP(env, fmt, args...) \
159do { \
160 fprintf(stderr, fmt , ##args); \
161 cpu_dump_state(env, stderr, fprintf, 0); \
162 if (loglevel != 0) { \
163 fprintf(logfile, fmt , ##args); \
164 cpu_dump_state(env, logfile, fprintf, 0); \
165 } \
166} while (0)
167
831b7825
TS		 168void cpu_loop(CPUPPCState *env)
169{
170 int trapnr;
171 uint32_t ret;
172 target_siginfo_t info;
173
174 for(;;) {
175 trapnr = cpu_ppc_exec(env);
831b7825 176 switch(trapnr) {
e1833e1f
JM		 177 case POWERPC_EXCP_NONE:
178 /* Just go on */
831b7825 179 break;
e1833e1f
JM		 180 case POWERPC_EXCP_CRITICAL: /* Critical input */
181 cpu_abort(env, "Critical interrupt while in user mode. "
182 "Aborting\n");
831b7825 183 break;
e1833e1f
JM		 184 case POWERPC_EXCP_MCHECK: /* Machine check exception */
185 cpu_abort(env, "Machine check exception while in user mode. "
186 "Aborting\n");
187 break;
188 case POWERPC_EXCP_DSI: /* Data storage exception */
831b7825
TS		 189#ifndef DAR
190/* To deal with multiple qemu header version as host for the darwin-user code */
191# define DAR SPR_DAR
192#endif
e1833e1f
JM		 193 EXCP_DUMP(env, "Invalid data memory access: 0x" ADDRX "\n",
194 env->spr[SPR_DAR]);
831b7825
TS		 195 /* Handle this via the gdb */
196 gdb_handlesig (env, SIGSEGV);
197
198 info.si_addr = (void*)env->nip;
199 queue_signal(info.si_signo, &info);
200 break;
e1833e1f
JM		 201 case POWERPC_EXCP_ISI: /* Instruction storage exception */
202 EXCP_DUMP(env, "Invalid instruction fetch: 0x\n" ADDRX "\n",
203 env->spr[SPR_DAR]);
831b7825
TS		 204 /* Handle this via the gdb */
205 gdb_handlesig (env, SIGSEGV);
206
207 info.si_addr = (void*)(env->nip - 4);
208 queue_signal(info.si_signo, &info);
209 break;
e1833e1f
JM		 210 case POWERPC_EXCP_EXTERNAL: /* External input */
211 cpu_abort(env, "External interrupt while in user mode. "
212 "Aborting\n");
213 break;
214 case POWERPC_EXCP_ALIGN: /* Alignment exception */
215 EXCP_DUMP(env, "Unaligned memory access\n");
831b7825
TS		 216 info.si_errno = 0;
217 info.si_code = BUS_ADRALN;
218 info.si_addr = (void*)(env->nip - 4);
219 queue_signal(info.si_signo, &info);
220 break;
e1833e1f
JM		 221 case POWERPC_EXCP_PROGRAM: /* Program exception */
222 /* XXX: check this */
831b7825 223 switch (env->error_code & ~0xF) {
e1833e1f
JM		 224 case POWERPC_EXCP_FP:
225 EXCP_DUMP(env, "Floating point program exception\n");
226 /* Set FX */
227 env->fpscr[7] |= 0x8;
228 /* Finally, update FEX */
229 if ((((env->fpscr[7] & 0x3) << 3) | (env->fpscr[6] >> 1)) &
230 ((env->fpscr[1] << 1) | (env->fpscr[0] >> 3)))
231 env->fpscr[7] |= 0x4;
232 info.si_signo = SIGFPE;
233 info.si_errno = 0;
234 switch (env->error_code & 0xF) {
235 case POWERPC_EXCP_FP_OX:
236 info.si_code = FPE_FLTOVF;
237 break;
238 case POWERPC_EXCP_FP_UX:
239 info.si_code = FPE_FLTUND;
240 break;
241 case POWERPC_EXCP_FP_ZX:
242 case POWERPC_EXCP_FP_VXZDZ:
243 info.si_code = FPE_FLTDIV;
244 break;
245 case POWERPC_EXCP_FP_XX:
246 info.si_code = FPE_FLTRES;
247 break;
248 case POWERPC_EXCP_FP_VXSOFT:
249 info.si_code = FPE_FLTINV;
250 break;
251 case POWERPC_EXCP_FP_VXNAN:
252 case POWERPC_EXCP_FP_VXISI:
253 case POWERPC_EXCP_FP_VXIDI:
254 case POWERPC_EXCP_FP_VXIMZ:
255 case POWERPC_EXCP_FP_VXVC:
256 case POWERPC_EXCP_FP_VXSQRT:
257 case POWERPC_EXCP_FP_VXCVI:
258 info.si_code = FPE_FLTSUB;
831b7825 259 break;
831b7825 260 default:
e1833e1f
JM		 261 EXCP_DUMP(env, "Unknown floating point exception (%02x)\n",
262 env->error_code);
263 break;
264 }
265 break;
266 case POWERPC_EXCP_INVAL:
267 EXCP_DUMP(env, "Invalid instruction\n");
268 info.si_signo = SIGILL;
269 info.si_errno = 0;
270 switch (env->error_code & 0xF) {
271 case POWERPC_EXCP_INVAL_INVAL:
272 info.si_code = ILL_ILLOPC;
273 break;
274 case POWERPC_EXCP_INVAL_LSWX:
275 info.si_code = ILL_ILLOPN;
276 break;
277 case POWERPC_EXCP_INVAL_SPR:
278 info.si_code = ILL_PRVREG;
279 break;
280 case POWERPC_EXCP_INVAL_FP:
281 info.si_code = ILL_COPROC;
282 break;
283 default:
284 EXCP_DUMP(env, "Unknown invalid operation (%02x)\n",
285 env->error_code & 0xF);
286 info.si_code = ILL_ILLADR;
287 break;
288 }
289 /* Handle this via the gdb */
290 gdb_handlesig (env, SIGSEGV);
291 break;
292 case POWERPC_EXCP_PRIV:
293 EXCP_DUMP(env, "Privilege violation\n");
294 info.si_signo = SIGILL;
295 info.si_errno = 0;
296 switch (env->error_code & 0xF) {
297 case POWERPC_EXCP_PRIV_OPC:
298 info.si_code = ILL_PRVOPC;
299 break;
300 case POWERPC_EXCP_PRIV_REG:
301 info.si_code = ILL_PRVREG;
302 break;
303 default:
304 EXCP_DUMP(env, "Unknown privilege violation (%02x)\n",
305 env->error_code & 0xF);
306 info.si_code = ILL_PRVOPC;
307 break;
308 }
309 break;
310 case POWERPC_EXCP_TRAP:
311 cpu_abort(env, "Tried to call a TRAP\n");
312 break;
313 default:
314 /* Should not happen ! */
315 cpu_abort(env, "Unknown program exception (%02x)\n",
316 env->error_code);
317 break;
831b7825
TS		 318 }
319 info.si_addr = (void*)(env->nip - 4);
320 queue_signal(info.si_signo, &info);
321 break;
e1833e1f
JM		 322 case POWERPC_EXCP_FPU: /* Floating-point unavailable exception */
323 EXCP_DUMP(env, "No floating point allowed\n");
324 info.si_signo = SIGILL;
831b7825
TS		 325 info.si_errno = 0;
326 info.si_code = ILL_COPROC;
327 info.si_addr = (void*)(env->nip - 4);
328 queue_signal(info.si_signo, &info);
329 break;
e1833e1f
JM		 330 case POWERPC_EXCP_SYSCALL: /* System call exception */
331 cpu_abort(env, "Syscall exception while in user mode. "
332 "Aborting\n");
831b7825 333 break;
e1833e1f
JM		 334 case POWERPC_EXCP_APU: /* Auxiliary processor unavailable */
335 EXCP_DUMP(env, "No APU instruction allowed\n");
336 info.si_signo = SIGILL;
337 info.si_errno = 0;
338 info.si_code = ILL_COPROC;
339 info.si_addr = (void*)(env->nip - 4);
340 queue_signal(info.si_signo, &info);
341 break;
342 case POWERPC_EXCP_DECR: /* Decrementer exception */
343 cpu_abort(env, "Decrementer interrupt while in user mode. "
344 "Aborting\n");
345 break;
346 case POWERPC_EXCP_FIT: /* Fixed-interval timer interrupt */
347 cpu_abort(env, "Fix interval timer interrupt while in user mode. "
348 "Aborting\n");
349 break;
350 case POWERPC_EXCP_WDT: /* Watchdog timer interrupt */
351 cpu_abort(env, "Watchdog timer interrupt while in user mode. "
352 "Aborting\n");
831b7825 353 break;
e1833e1f
JM		 354 case POWERPC_EXCP_DTLB: /* Data TLB error */
355 cpu_abort(env, "Data TLB exception while in user mode. "
356 "Aborting\n");
831b7825 357 break;
e1833e1f
JM		 358 case POWERPC_EXCP_ITLB: /* Instruction TLB error */
359 cpu_abort(env, "Instruction TLB exception while in user mode. "
360 "Aborting\n");
831b7825 361 break;
e1833e1f 362 case POWERPC_EXCP_DEBUG: /* Debug interrupt */
831b7825
TS		 363 gdb_handlesig (env, SIGTRAP);
364 break;
e1833e1f
JM		 365#if defined(TARGET_PPCEMB)
366 case POWERPC_EXCP_SPEU: /* SPE/embedded floating-point unavail. */
367 EXCP_DUMP(env, "No SPE/floating-point instruction allowed\n");
368 info.si_signo = SIGILL;
369 info.si_errno = 0;
370 info.si_code = ILL_COPROC;
371 info.si_addr = (void*)(env->nip - 4);
372 queue_signal(info.si_signo, &info);
373 break;
374 case POWERPC_EXCP_EFPDI: /* Embedded floating-point data IRQ */
375 cpu_abort(env, "Embedded floating-point data IRQ not handled\n");
376 break;
377 case POWERPC_EXCP_EFPRI: /* Embedded floating-point round IRQ */
378 cpu_abort(env, "Embedded floating-point round IRQ not handled\n");
379 break;
380 case POWERPC_EXCP_EPERFM: /* Embedded performance monitor IRQ */
381 cpu_abort(env, "Performance monitor exception not handled\n");
382 break;
383 case POWERPC_EXCP_DOORI: /* Embedded doorbell interrupt */
384 cpu_abort(env, "Doorbell interrupt while in user mode. "
385 "Aborting\n");
386 break;
387 case POWERPC_EXCP_DOORCI: /* Embedded doorbell critical interrupt */
388 cpu_abort(env, "Doorbell critical interrupt while in user mode. "
389 "Aborting\n");
390 break;
391#endif /* defined(TARGET_PPCEMB) */
392 case POWERPC_EXCP_RESET: /* System reset exception */
393 cpu_abort(env, "Reset interrupt while in user mode. "
394 "Aborting\n");
395 break;
396#if defined(TARGET_PPC64) /* PowerPC 64 */
397 case POWERPC_EXCP_DSEG: /* Data segment exception */
398 cpu_abort(env, "Data segment exception while in user mode. "
399 "Aborting\n");
400 break;
401 case POWERPC_EXCP_ISEG: /* Instruction segment exception */
402 cpu_abort(env, "Instruction segment exception "
403 "while in user mode. Aborting\n");
404 break;
405#endif /* defined(TARGET_PPC64) */
406#if defined(TARGET_PPC64H) /* PowerPC 64 with hypervisor mode support */
407 case POWERPC_EXCP_HDECR: /* Hypervisor decrementer exception */
408 cpu_abort(env, "Hypervisor decrementer interrupt "
409 "while in user mode. Aborting\n");
410 break;
411#endif /* defined(TARGET_PPC64H) */
412 case POWERPC_EXCP_TRACE: /* Trace exception */
413 /* Nothing to do:
414 * we use this exception to emulate step-by-step execution mode.
415 */
416 break;
417#if defined(TARGET_PPC64H) /* PowerPC 64 with hypervisor mode support */
418 case POWERPC_EXCP_HDSI: /* Hypervisor data storage exception */
419 cpu_abort(env, "Hypervisor data storage exception "
420 "while in user mode. Aborting\n");
421 break;
422 case POWERPC_EXCP_HISI: /* Hypervisor instruction storage excp */
423 cpu_abort(env, "Hypervisor instruction storage exception "
424 "while in user mode. Aborting\n");
425 break;
426 case POWERPC_EXCP_HDSEG: /* Hypervisor data segment exception */
427 cpu_abort(env, "Hypervisor data segment exception "
428 "while in user mode. Aborting\n");
429 break;
430 case POWERPC_EXCP_HISEG: /* Hypervisor instruction segment excp */
431 cpu_abort(env, "Hypervisor instruction segment exception "
432 "while in user mode. Aborting\n");
433 break;
434#endif /* defined(TARGET_PPC64H) */
435 case POWERPC_EXCP_VPU: /* Vector unavailable exception */
436 EXCP_DUMP(env, "No Altivec instructions allowed\n");
437 info.si_signo = SIGILL;
438 info.si_errno = 0;
439 info.si_code = ILL_COPROC;
440 info.si_addr = (void*)(env->nip - 4);
441 queue_signal(info.si_signo, &info);
442 break;
443 case POWERPC_EXCP_PIT: /* Programmable interval timer IRQ */
444 cpu_abort(env, "Programable interval timer interrupt "
445 "while in user mode. Aborting\n");
446 break;
447 case POWERPC_EXCP_IO: /* IO error exception */
448 cpu_abort(env, "IO error exception while in user mode. "
449 "Aborting\n");
450 break;
451 case POWERPC_EXCP_RUNM: /* Run mode exception */
452 cpu_abort(env, "Run mode exception while in user mode. "
453 "Aborting\n");
454 break;
455 case POWERPC_EXCP_EMUL: /* Emulation trap exception */
456 cpu_abort(env, "Emulation trap exception not handled\n");
457 break;
458 case POWERPC_EXCP_IFTLB: /* Instruction fetch TLB error */
459 cpu_abort(env, "Instruction fetch TLB exception "
460 "while in user-mode. Aborting");
461 break;
462 case POWERPC_EXCP_DLTLB: /* Data load TLB miss */
463 cpu_abort(env, "Data load TLB exception while in user-mode. "
464 "Aborting");
465 break;
466 case POWERPC_EXCP_DSTLB: /* Data store TLB miss */
467 cpu_abort(env, "Data store TLB exception while in user-mode. "
468 "Aborting");
469 break;
470 case POWERPC_EXCP_FPA: /* Floating-point assist exception */
471 cpu_abort(env, "Floating-point assist exception not handled\n");
472 break;
473 case POWERPC_EXCP_IABR: /* Instruction address breakpoint */
474 cpu_abort(env, "Instruction address breakpoint exception "
475 "not handled\n");
476 break;
477 case POWERPC_EXCP_SMI: /* System management interrupt */
478 cpu_abort(env, "System management interrupt while in user mode. "
479 "Aborting\n");
480 break;
481 case POWERPC_EXCP_THERM: /* Thermal interrupt */
482 cpu_abort(env, "Thermal interrupt interrupt while in user mode. "
483 "Aborting\n");
484 break;
485 case POWERPC_EXCP_PERFM: /* Embedded performance monitor IRQ */
486 cpu_abort(env, "Performance monitor exception not handled\n");
487 break;
488 case POWERPC_EXCP_VPUA: /* Vector assist exception */
489 cpu_abort(env, "Vector assist exception not handled\n");
490 break;
491 case POWERPC_EXCP_SOFTP: /* Soft patch exception */
492 cpu_abort(env, "Soft patch exception not handled\n");
493 break;
494 case POWERPC_EXCP_MAINT: /* Maintenance exception */
495 cpu_abort(env, "Maintenance exception while in user mode. "
496 "Aborting\n");
497 break;
498 case POWERPC_EXCP_STOP: /* stop translation */
499 /* We did invalidate the instruction cache. Go on */
500 break;
501 case POWERPC_EXCP_BRANCH: /* branch instruction: */
502 /* We just stopped because of a branch. Go on */
503 break;
504 case POWERPC_EXCP_SYSCALL_USER:
505 /* system call in user-mode emulation */
506 /* system call */
507 if(((int)env->gpr[0]) <= SYS_MAXSYSCALL && ((int)env->gpr[0])>0)
508 ret = do_unix_syscall(env, env->gpr[0]/*, env->gpr[3], env->gpr[4],
509 env->gpr[5], env->gpr[6], env->gpr[7],
510 env->gpr[8], env->gpr[9], env->gpr[10]*/);
511 else if(((int)env->gpr[0])<0)
512 ret = do_mach_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4],
513 env->gpr[5], env->gpr[6], env->gpr[7],
514 env->gpr[8], env->gpr[9], env->gpr[10]);
515 else
516 ret = do_thread_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4],
517 env->gpr[5], env->gpr[6], env->gpr[7],
518 env->gpr[8], env->gpr[9], env->gpr[10]);
519
520 /* Unix syscall error signaling */
521 if(((int)env->gpr[0]) <= SYS_MAXSYSCALL && ((int)env->gpr[0])>0)
522 {
523 if( (int)ret < 0 )
524 env->nip += 0;
525 else
526 env->nip += 4;
831b7825 527 }
e1833e1f
JM		 528
529 /* Return value */
530 env->gpr[3] = ret;
531 break;
532 default:
533 cpu_abort(env, "Unknown exception 0x%d. Aborting\n", trapnr);
534 break;
831b7825
TS		 535 }
536 process_pending_signals(env);
537 }
538}
539#endif
540
541
542#ifdef TARGET_I386
543
544/***********************************************************/
545/* CPUX86 core interface */
546
547uint64_t cpu_get_tsc(CPUX86State *env)
548{
549 return cpu_get_real_ticks();
550}
551
552void
553write_dt(void *ptr, unsigned long addr, unsigned long limit,
554 int flags)
555{
556 unsigned int e1, e2;
557 e1 = (addr << 16) | (limit & 0xffff);
558 e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
559 e2 |= flags;
560 stl((uint8_t *)ptr, e1);
561 stl((uint8_t *)ptr + 4, e2);
562}
563
564static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
565 unsigned long addr, unsigned int sel)
566{
567 unsigned int e1, e2;
568 e1 = (addr & 0xffff) | (sel << 16);
569 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
570 stl((uint8_t *)ptr, e1);
571 stl((uint8_t *)ptr + 4, e2);
572}
573
574#define GDT_TABLE_SIZE 14
575#define LDT_TABLE_SIZE 15
576#define IDT_TABLE_SIZE 256
577#define TSS_SIZE 104
578uint64_t gdt_table[GDT_TABLE_SIZE];
579uint64_t ldt_table[LDT_TABLE_SIZE];
580uint64_t idt_table[IDT_TABLE_SIZE];
581uint32_t tss[TSS_SIZE];
582
583/* only dpl matters as we do only user space emulation */
584static void set_idt(int n, unsigned int dpl)
585{
586 set_gate(idt_table + n, 0, dpl, 0, 0);
587}
588
589/* ABI convention: after a syscall if there was an error the CF flag is set */
46ea3397 590static inline void set_error(CPUX86State *env, int ret)
831b7825
TS		 591{
592 if(ret<0)
593 env->eflags = env->eflags | 0x1;
594 else
595 env->eflags &= ~0x1;
596 env->regs[R_EAX] = ret;
597}
598
599void cpu_loop(CPUX86State *env)
600{
601 int trapnr;
602 int ret;
603 uint8_t *pc;
604 target_siginfo_t info;
605
606 for(;;) {
607 trapnr = cpu_x86_exec(env);
608 uint32_t *params = (uint32_t *)env->regs[R_ESP];
609 switch(trapnr) {
610 case 0x79: /* Our commpage hack back door exit is here */
611 do_commpage(env, env->eip, *(params + 1), *(params + 2),
612 *(params + 3), *(params + 4),
613 *(params + 5), *(params + 6),
614 *(params + 7), *(params + 8));
615 break;
616 case 0x81: /* mach syscall */
617 {
618 ret = do_mach_syscall(env, env->regs[R_EAX],
619 *(params + 1), *(params + 2),
620 *(params + 3), *(params + 4),
621 *(params + 5), *(params + 6),
622 *(params + 7), *(params + 8));
623 set_error(env, ret);
624 break;
625 }
626 case 0x90: /* unix backdoor */
627 {
628 /* after sysenter, stack is in R_ECX, new eip in R_EDX (sysexit will flip them back)*/
629 int saved_stack = env->regs[R_ESP];
630 env->regs[R_ESP] = env->regs[R_ECX];
631
632 ret = do_unix_syscall(env, env->regs[R_EAX]);
633
634 env->regs[R_ECX] = env->regs[R_ESP];
635 env->regs[R_ESP] = saved_stack;
636
637 set_error(env, ret);
638 break;
639 }
640 case 0x80: /* unix syscall */
641 {
642 ret = do_unix_syscall(env, env->regs[R_EAX]/*,
643 *(params + 1), *(params + 2),
644 *(params + 3), *(params + 4),
645 *(params + 5), *(params + 6),
646 *(params + 7), *(params + 8)*/);
647 set_error(env, ret);
648 break;
649 }
650 case 0x82: /* thread syscall */
651 {
652 ret = do_thread_syscall(env, env->regs[R_EAX],
653 *(params + 1), *(params + 2),
654 *(params + 3), *(params + 4),
655 *(params + 5), *(params + 6),
656 *(params + 7), *(params + 8));
657 set_error(env, ret);
658 break;
659 }
660 case EXCP0B_NOSEG:
661 case EXCP0C_STACK:
662 info.si_signo = SIGBUS;
663 info.si_errno = 0;
664 info.si_code = BUS_NOOP;
665 info.si_addr = 0;
666 gdb_handlesig (env, SIGBUS);
667 queue_signal(info.si_signo, &info);
668 break;
669 case EXCP0D_GPF:
670 info.si_signo = SIGSEGV;
671 info.si_errno = 0;
672 info.si_code = SEGV_NOOP;
673 info.si_addr = 0;
674 gdb_handlesig (env, SIGSEGV);
675 queue_signal(info.si_signo, &info);
676 break;
677 case EXCP0E_PAGE:
678 info.si_signo = SIGSEGV;
679 info.si_errno = 0;
680 if (!(env->error_code & 1))
681 info.si_code = SEGV_MAPERR;
682 else
683 info.si_code = SEGV_ACCERR;
684 info.si_addr = (void*)env->cr[2];
685 gdb_handlesig (env, SIGSEGV);
686 queue_signal(info.si_signo, &info);
687 break;
688 case EXCP00_DIVZ:
689 /* division by zero */
690 info.si_signo = SIGFPE;
691 info.si_errno = 0;
692 info.si_code = FPE_INTDIV;
693 info.si_addr = (void*)env->eip;
694 gdb_handlesig (env, SIGFPE);
695 queue_signal(info.si_signo, &info);
696 break;
697 case EXCP01_SSTP:
698 case EXCP03_INT3:
699 info.si_signo = SIGTRAP;
700 info.si_errno = 0;
701 info.si_code = TRAP_BRKPT;
702 info.si_addr = (void*)env->eip;
703 gdb_handlesig (env, SIGTRAP);
704 queue_signal(info.si_signo, &info);
705 break;
706 case EXCP04_INTO:
707 case EXCP05_BOUND:
708 info.si_signo = SIGSEGV;
709 info.si_errno = 0;
710 info.si_code = SEGV_NOOP;
711 info.si_addr = 0;
712 gdb_handlesig (env, SIGSEGV);
713 queue_signal(info.si_signo, &info);
714 break;
715 case EXCP06_ILLOP:
716 info.si_signo = SIGILL;
717 info.si_errno = 0;
718 info.si_code = ILL_ILLOPN;
719 info.si_addr = (void*)env->eip;
720 gdb_handlesig (env, SIGILL);
721 queue_signal(info.si_signo, &info);
722 break;
723 case EXCP_INTERRUPT:
724 /* just indicate that signals should be handled asap */
725 break;
726 case EXCP_DEBUG:
727 {
728 int sig;
729
730 sig = gdb_handlesig (env, SIGTRAP);
731 if (sig)
732 {
733 info.si_signo = sig;
734 info.si_errno = 0;
735 info.si_code = TRAP_BRKPT;
736 queue_signal(info.si_signo, &info);
737 }
738 }
739 break;
740 default:
741 pc = (void*)(env->segs[R_CS].base + env->eip);
742 fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
743 (long)pc, trapnr);
744 abort();
745 }
746 process_pending_signals(env);
747 }
748}
749#endif
750
751void usage(void)
752{
753 printf("qemu-" TARGET_ARCH " version " QEMU_VERSION ", Copyright (c) 2003-2004 Fabrice Bellard\n"
754 "usage: qemu-" TARGET_ARCH " [-h] [-d opts] [-L path] [-s size] program [arguments...]\n"
755 "Darwin CPU emulator (compiled for %s emulation)\n"
756 "\n"
757 "-h print this help\n"
1e2bed4f 758 "-L path set the %s library path (default='%s')\n"
831b7825
TS		 759 "-s size set the stack size in bytes (default=%ld)\n"
760 "\n"
761 "debug options:\n"
762#ifdef USE_CODE_COPY
763 "-no-code-copy disable code copy acceleration\n"
764#endif
1e2bed4f 765 "-d options activate log (logfile='%s')\n"
831b7825
TS		 766 "-g wait for gdb on port 1234\n"
767 "-p pagesize set the host page size to 'pagesize'\n",
768 TARGET_ARCH,
1e2bed4f 769 TARGET_ARCH,
831b7825
TS		 770 interp_prefix,
771 stack_size,
772 DEBUG_LOGFILE);
773 _exit(1);
774}
775
776/* XXX: currently only used for async signals (see signal.c) */
777CPUState *global_env;
778/* used only if single thread */
779CPUState *cpu_single_env = NULL;
780
781/* used to free thread contexts */
782TaskState *first_task_state;
783
784int main(int argc, char **argv)
785{
786 const char *filename;
787 struct target_pt_regs regs1, *regs = &regs1;
788 TaskState ts1, *ts = &ts1;
789 CPUState *env;
790 int optind;
791 short use_gdbstub = 0;
792 const char *r;
793
794 if (argc <= 1)
795 usage();
796
797 /* init debug */
798 cpu_set_log_filename(DEBUG_LOGFILE);
799
800 optind = 1;
801 for(;;) {
802 if (optind >= argc)
803 break;
804 r = argv[optind];
805 if (r[0] != '-')
806 break;
807 optind++;
808 r++;
809 if (!strcmp(r, "-")) {
810 break;
811 } else if (!strcmp(r, "d")) {
812 int mask;
813 CPULogItem *item;
814
815 if (optind >= argc)
816 break;
817
818 r = argv[optind++];
819 mask = cpu_str_to_log_mask(r);
820 if (!mask) {
821 printf("Log items (comma separated):\n");
822 for(item = cpu_log_items; item->mask != 0; item++) {
823 printf("%-10s %s\n", item->name, item->help);
824 }
825 exit(1);
826 }
827 cpu_set_log(mask);
828 } else if (!strcmp(r, "s")) {
829 r = argv[optind++];
830 stack_size = strtol(r, (char **)&r, 0);
831 if (stack_size <= 0)
832 usage();
833 if (*r == 'M')
834 stack_size *= 1024 * 1024;
835 else if (*r == 'k' || *r == 'K')
836 stack_size *= 1024;
837 } else if (!strcmp(r, "L")) {
838 interp_prefix = argv[optind++];
839 } else if (!strcmp(r, "p")) {
840 qemu_host_page_size = atoi(argv[optind++]);
841 if (qemu_host_page_size == 0 ||
842 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
843 fprintf(stderr, "page size must be a power of two\n");
844 exit(1);
845 }
846 } else
847 if (!strcmp(r, "g")) {
848 use_gdbstub = 1;
849 } else
850#ifdef USE_CODE_COPY
851 if (!strcmp(r, "no-code-copy")) {
852 code_copy_enabled = 0;
853 } else
854#endif
855 {
856 usage();
857 }
858 }
859 if (optind >= argc)
860 usage();
861 filename = argv[optind];
862
863 /* Zero out regs */
864 memset(regs, 0, sizeof(struct target_pt_regs));
865
831b7825
TS		 866 /* NOTE: we need to init the CPU at this stage to get
867 qemu_host_page_size */
868 env = cpu_init();
869
870 printf("Starting %s with qemu\n----------------\n", filename);
871
872 commpage_init();
873
874 if (mach_exec(filename, argv+optind, environ, regs) != 0) {
875 printf("Error loading %s\n", filename);
876 _exit(1);
877 }
878
879 syscall_init();
880 signal_init();
881 global_env = env;
882
883 /* build Task State */
884 memset(ts, 0, sizeof(TaskState));
885 env->opaque = ts;
886 ts->used = 1;
887 env->user_mode_only = 1;
888
889#if defined(TARGET_I386)
890 cpu_x86_set_cpl(env, 3);
891
892 env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
893 env->hflags |= HF_PE_MASK;
894
895 if (env->cpuid_features & CPUID_SSE) {
896 env->cr[4] |= CR4_OSFXSR_MASK;
897 env->hflags |= HF_OSFXSR_MASK;
898 }
899
900 /* flags setup : we activate the IRQs by default as in user mode */
901 env->eflags |= IF_MASK;
902
903 /* darwin register setup */
904 env->regs[R_EAX] = regs->eax;
905 env->regs[R_EBX] = regs->ebx;
906 env->regs[R_ECX] = regs->ecx;
907 env->regs[R_EDX] = regs->edx;
908 env->regs[R_ESI] = regs->esi;
909 env->regs[R_EDI] = regs->edi;
910 env->regs[R_EBP] = regs->ebp;
911 env->regs[R_ESP] = regs->esp;
912 env->eip = regs->eip;
913
914 /* Darwin LDT setup */
915 /* 2 - User code segment
916 3 - User data segment
917 4 - User cthread */
918 bzero(ldt_table, LDT_TABLE_SIZE * sizeof(ldt_table[0]));
919 env->ldt.base = (uint32_t) ldt_table;
920 env->ldt.limit = sizeof(ldt_table) - 1;
921
922 write_dt(ldt_table + 2, 0, 0xfffff,
923 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
924 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
925 write_dt(ldt_table + 3, 0, 0xfffff,
926 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
927 (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
928 write_dt(ldt_table + 4, 0, 0xfffff,
929 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
930 (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
931
932 /* Darwin GDT setup.
933 * has changed a lot between old Darwin/x86 (pre-Mac Intel) and Mac OS X/x86,
934 now everything is done via int 0x81(mach) int 0x82 (thread) and sysenter/sysexit(unix) */
935 bzero(gdt_table, sizeof(gdt_table));
936 env->gdt.base = (uint32_t)gdt_table;
937 env->gdt.limit = sizeof(gdt_table) - 1;
938
939 /* Set up a back door to handle sysenter syscalls (unix) */
940 char * syscallbackdoor = malloc(64);
941 page_set_flags((int)syscallbackdoor, (int)syscallbackdoor + 64, PROT_EXEC | PROT_READ | PAGE_VALID);
942
943 int i = 0;
944 syscallbackdoor[i++] = 0xcd;
945 syscallbackdoor[i++] = 0x90; /* int 0x90 */
946 syscallbackdoor[i++] = 0x0F;
947 syscallbackdoor[i++] = 0x35; /* sysexit */
948
949 /* Darwin sysenter/sysexit setup */
950 env->sysenter_cs = 0x1; //XXX
951 env->sysenter_eip = (int)syscallbackdoor;
952 env->sysenter_esp = (int)malloc(64);
953
954 /* Darwin TSS setup
955 This must match up with GDT[4] */
956 env->tr.base = (uint32_t) tss;
957 env->tr.limit = sizeof(tss) - 1;
958 env->tr.flags = DESC_P_MASK | (0x9 << DESC_TYPE_SHIFT);
959 stw(tss + 2, 0x10); // ss0 = 0x10 = GDT[2] = Kernel Data Segment
960
961 /* Darwin interrupt setup */
962 bzero(idt_table, sizeof(idt_table));
963 env->idt.base = (uint32_t) idt_table;
964 env->idt.limit = sizeof(idt_table) - 1;
965 set_idt(0, 0);
966 set_idt(1, 0);
967 set_idt(2, 0);
968 set_idt(3, 3);
969 set_idt(4, 3);
970 set_idt(5, 3);
971 set_idt(6, 0);
972 set_idt(7, 0);
973 set_idt(8, 0);
974 set_idt(9, 0);
975 set_idt(10, 0);
976 set_idt(11, 0);
977 set_idt(12, 0);
978 set_idt(13, 0);
979 set_idt(14, 0);
980 set_idt(15, 0);
981 set_idt(16, 0);
982 set_idt(17, 0);
983 set_idt(18, 0);
984 set_idt(19, 0);
985 /* Syscalls are done via
986 int 0x80 (unix) (rarely used)
987 int 0x81 (mach)
988 int 0x82 (thread)
989 int 0x83 (diag) (not handled here)
990 sysenter/sysexit (unix) -> we redirect that to int 0x90 */
991 set_idt(0x79, 3); /* Commpage hack, here is our backdoor interrupt */
992 set_idt(0x80, 3); /* Unix Syscall */
993 set_idt(0x81, 3); /* Mach Syscalls */
994 set_idt(0x82, 3); /* thread Syscalls */
995
1e2bed4f 996 set_idt(0x90, 3); /* qemu-darwin-user's Unix syscalls backdoor */
831b7825
TS		 997
998
999 cpu_x86_load_seg(env, R_CS, __USER_CS);
1000 cpu_x86_load_seg(env, R_DS, __USER_DS);
1001 cpu_x86_load_seg(env, R_ES, __USER_DS);
1002 cpu_x86_load_seg(env, R_SS, __USER_DS);
1003 cpu_x86_load_seg(env, R_FS, __USER_DS);
1004 cpu_x86_load_seg(env, R_GS, __USER_DS);
1005
1006#elif defined(TARGET_PPC)
1007 {
1008 int i;
1009 env->nip = regs->nip;
1010 for(i = 0; i < 32; i++) {
1011 env->gpr[i] = regs->gpr[i];
1012 }
1013 }
1014#else
1015#error unsupported target CPU
1016#endif
1017
1018 if (use_gdbstub) {
1019 printf("Waiting for gdb Connection on port 1234...\n");
1020 gdbserver_start (1234);
1021 gdb_handlesig(env, 0);
1022 }
1023
1024 cpu_loop(env);
1025 /* never exits */
1026 return 0;
1027}
Qemu copy for testing