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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 | ||
43 | const char *interp_prefix = ""; | |
44 | ||
45 | asm(".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 */ | |
50 | unsigned long stack_size = 512 * 1024; | |
51 | ||
52 | void 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 | ||
63 | void 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 | ||
72 | void cpu_outb(CPUState *env, int addr, int val) | |
73 | { | |
74 | fprintf(stderr, "outb: port=0x%04x, data=%02x\n", addr, val); | |
75 | } | |
76 | ||
77 | void cpu_outw(CPUState *env, int addr, int val) | |
78 | { | |
79 | fprintf(stderr, "outw: port=0x%04x, data=%04x\n", addr, val); | |
80 | } | |
81 | ||
82 | void cpu_outl(CPUState *env, int addr, int val) | |
83 | { | |
84 | fprintf(stderr, "outl: port=0x%04x, data=%08x\n", addr, val); | |
85 | } | |
86 | ||
87 | int cpu_inb(CPUState *env, int addr) | |
88 | { | |
89 | fprintf(stderr, "inb: port=0x%04x\n", addr); | |
90 | return 0; | |
91 | } | |
92 | ||
93 | int cpu_inw(CPUState *env, int addr) | |
94 | { | |
95 | fprintf(stderr, "inw: port=0x%04x\n", addr); | |
96 | return 0; | |
97 | } | |
98 | ||
99 | int cpu_inl(CPUState *env, int addr) | |
100 | { | |
101 | fprintf(stderr, "inl: port=0x%04x\n", addr); | |
102 | return 0; | |
103 | } | |
104 | ||
105 | int cpu_get_pic_interrupt(CPUState *env) | |
106 | { | |
107 | return -1; | |
108 | } | |
109 | #ifdef TARGET_PPC | |
110 | ||
111 | static inline uint64_t cpu_ppc_get_tb (CPUState *env) | |
112 | { | |
113 | /* TO FIX */ | |
114 | return 0; | |
115 | } | |
116 | ||
117 | uint32_t cpu_ppc_load_tbl (CPUState *env) | |
118 | { | |
119 | return cpu_ppc_get_tb(env) & 0xFFFFFFFF; | |
120 | } | |
121 | ||
122 | uint32_t cpu_ppc_load_tbu (CPUState *env) | |
123 | { | |
124 | return cpu_ppc_get_tb(env) >> 32; | |
125 | } | |
126 | ||
127 | static void cpu_ppc_store_tb (CPUState *env, uint64_t value) | |
128 | { | |
129 | /* TO FIX */ | |
130 | } | |
131 | ||
132 | void 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 | ||
137 | void 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 | ||
142 | uint32_t cpu_ppc_load_decr (CPUState *env) | |
143 | { | |
144 | /* TO FIX */ | |
145 | return -1; | |
146 | } | |
147 | ||
148 | void cpu_ppc_store_decr (CPUState *env, uint32_t value) | |
149 | { | |
150 | /* TO FIX */ | |
151 | } | |
152 | ||
153 | void 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 | ||
438 | uint64_t cpu_get_tsc(CPUX86State *env) | |
439 | { | |
440 | return cpu_get_real_ticks(); | |
441 | } | |
442 | ||
443 | void | |
444 | write_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 | ||
455 | static 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 | |
469 | uint64_t gdt_table[GDT_TABLE_SIZE]; | |
470 | uint64_t ldt_table[LDT_TABLE_SIZE]; | |
471 | uint64_t idt_table[IDT_TABLE_SIZE]; | |
472 | uint32_t tss[TSS_SIZE]; | |
473 | ||
474 | /* only dpl matters as we do only user space emulation */ | |
475 | static 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 */ | |
481 | static 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 | ||
490 | void 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 | ||
642 | void 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) */ | |
667 | CPUState *global_env; | |
668 | /* used only if single thread */ | |
669 | CPUState *cpu_single_env = NULL; | |
670 | ||
671 | /* used to free thread contexts */ | |
672 | TaskState *first_task_state; | |
673 | ||
674 | int main(int argc, char **argv) | |
675 | { | |
676 | const char *filename; | |
677 | struct target_pt_regs regs1, *regs = ®s1; | |
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 | } |