root / darwin-user / main.c @ 46ea3397
History | View | Annotate | Download (29.5 kB)
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 void 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 |
} |