root / darwin-user / main.c @ 73f5e313
History | View | Annotate | Download (35.1 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, see <http://www.gnu.org/licenses/>.
|
19 |
*/
|
20 |
#include <stdlib.h> |
21 |
#include <stdio.h> |
22 |
#include <stdarg.h> |
23 |
#include <string.h> |
24 |
#include <errno.h> |
25 |
#include <unistd.h> |
26 |
|
27 |
#include <sys/syscall.h> |
28 |
#include <sys/mman.h> |
29 |
|
30 |
#include "qemu.h" |
31 |
|
32 |
#define DEBUG_LOGFILE "/tmp/qemu.log" |
33 |
|
34 |
#ifdef __APPLE__
|
35 |
#include <crt_externs.h> |
36 |
# define environ (*_NSGetEnviron())
|
37 |
#endif
|
38 |
|
39 |
#include <mach/mach_init.h> |
40 |
#include <mach/vm_map.h> |
41 |
|
42 |
int singlestep;
|
43 |
|
44 |
const char *interp_prefix = ""; |
45 |
|
46 |
asm(".zerofill __STD_PROG_ZONE, __STD_PROG_ZONE, __std_prog_zone, 0x0dfff000"); |
47 |
|
48 |
/* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
|
49 |
we allocate a bigger stack. Need a better solution, for example
|
50 |
by remapping the process stack directly at the right place */
|
51 |
unsigned long stack_size = 512 * 1024; |
52 |
|
53 |
void qerror(const char *fmt, ...) |
54 |
{ |
55 |
va_list ap; |
56 |
|
57 |
va_start(ap, fmt); |
58 |
vfprintf(stderr, fmt, ap); |
59 |
va_end(ap); |
60 |
fprintf(stderr, "\n");
|
61 |
exit(1);
|
62 |
} |
63 |
|
64 |
void gemu_log(const char *fmt, ...) |
65 |
{ |
66 |
va_list ap; |
67 |
|
68 |
va_start(ap, fmt); |
69 |
vfprintf(stderr, fmt, ap); |
70 |
va_end(ap); |
71 |
} |
72 |
|
73 |
int cpu_get_pic_interrupt(CPUState *env)
|
74 |
{ |
75 |
return -1; |
76 |
} |
77 |
#ifdef TARGET_PPC
|
78 |
|
79 |
static inline uint64_t cpu_ppc_get_tb (CPUState *env) |
80 |
{ |
81 |
/* TO FIX */
|
82 |
return 0; |
83 |
} |
84 |
|
85 |
uint64_t cpu_ppc_load_tbl (CPUState *env) |
86 |
{ |
87 |
return cpu_ppc_get_tb(env);
|
88 |
} |
89 |
|
90 |
uint32_t cpu_ppc_load_tbu (CPUState *env) |
91 |
{ |
92 |
return cpu_ppc_get_tb(env) >> 32; |
93 |
} |
94 |
|
95 |
uint64_t cpu_ppc_load_atbl (CPUState *env) |
96 |
{ |
97 |
return cpu_ppc_get_tb(env);
|
98 |
} |
99 |
|
100 |
uint32_t cpu_ppc_load_atbu (CPUState *env) |
101 |
{ |
102 |
return cpu_ppc_get_tb(env) >> 32; |
103 |
} |
104 |
|
105 |
uint32_t cpu_ppc601_load_rtcu (CPUState *env) |
106 |
{ |
107 |
cpu_ppc_load_tbu(env); |
108 |
} |
109 |
|
110 |
uint32_t cpu_ppc601_load_rtcl (CPUState *env) |
111 |
{ |
112 |
return cpu_ppc_load_tbl(env) & 0x3FFFFF80; |
113 |
} |
114 |
|
115 |
/* XXX: to be fixed */
|
116 |
int ppc_dcr_read (ppc_dcr_t *dcr_env, int dcrn, uint32_t *valp) |
117 |
{ |
118 |
return -1; |
119 |
} |
120 |
|
121 |
int ppc_dcr_write (ppc_dcr_t *dcr_env, int dcrn, uint32_t val) |
122 |
{ |
123 |
return -1; |
124 |
} |
125 |
|
126 |
#define EXCP_DUMP(env, fmt, ...) \
|
127 |
do { \
|
128 |
fprintf(stderr, fmt , ## __VA_ARGS__); \ |
129 |
cpu_dump_state(env, stderr, fprintf, 0); \
|
130 |
qemu_log(fmt, ## __VA_ARGS__); \ |
131 |
log_cpu_state(env, 0); \
|
132 |
} while (0) |
133 |
|
134 |
void cpu_loop(CPUPPCState *env)
|
135 |
{ |
136 |
int trapnr;
|
137 |
uint32_t ret; |
138 |
target_siginfo_t info; |
139 |
|
140 |
for(;;) {
|
141 |
trapnr = cpu_ppc_exec(env); |
142 |
switch(trapnr) {
|
143 |
case POWERPC_EXCP_NONE:
|
144 |
/* Just go on */
|
145 |
break;
|
146 |
case POWERPC_EXCP_CRITICAL: /* Critical input */ |
147 |
cpu_abort(env, "Critical interrupt while in user mode. "
|
148 |
"Aborting\n");
|
149 |
break;
|
150 |
case POWERPC_EXCP_MCHECK: /* Machine check exception */ |
151 |
cpu_abort(env, "Machine check exception while in user mode. "
|
152 |
"Aborting\n");
|
153 |
break;
|
154 |
case POWERPC_EXCP_DSI: /* Data storage exception */ |
155 |
#ifndef DAR
|
156 |
/* To deal with multiple qemu header version as host for the darwin-user code */
|
157 |
# define DAR SPR_DAR
|
158 |
#endif
|
159 |
EXCP_DUMP(env, "Invalid data memory access: 0x" TARGET_FMT_lx "\n", |
160 |
env->spr[SPR_DAR]); |
161 |
/* Handle this via the gdb */
|
162 |
gdb_handlesig (env, SIGSEGV); |
163 |
|
164 |
info.si_addr = (void*)env->nip;
|
165 |
queue_signal(info.si_signo, &info); |
166 |
break;
|
167 |
case POWERPC_EXCP_ISI: /* Instruction storage exception */ |
168 |
EXCP_DUMP(env, "Invalid instruction fetch: 0x\n" TARGET_FMT_lx "\n", |
169 |
env->spr[SPR_DAR]); |
170 |
/* Handle this via the gdb */
|
171 |
gdb_handlesig (env, SIGSEGV); |
172 |
|
173 |
info.si_addr = (void*)(env->nip - 4); |
174 |
queue_signal(info.si_signo, &info); |
175 |
break;
|
176 |
case POWERPC_EXCP_EXTERNAL: /* External input */ |
177 |
cpu_abort(env, "External interrupt while in user mode. "
|
178 |
"Aborting\n");
|
179 |
break;
|
180 |
case POWERPC_EXCP_ALIGN: /* Alignment exception */ |
181 |
EXCP_DUMP(env, "Unaligned memory access\n");
|
182 |
info.si_errno = 0;
|
183 |
info.si_code = BUS_ADRALN; |
184 |
info.si_addr = (void*)(env->nip - 4); |
185 |
queue_signal(info.si_signo, &info); |
186 |
break;
|
187 |
case POWERPC_EXCP_PROGRAM: /* Program exception */ |
188 |
/* XXX: check this */
|
189 |
switch (env->error_code & ~0xF) { |
190 |
case POWERPC_EXCP_FP:
|
191 |
EXCP_DUMP(env, "Floating point program exception\n");
|
192 |
/* Set FX */
|
193 |
info.si_signo = SIGFPE; |
194 |
info.si_errno = 0;
|
195 |
switch (env->error_code & 0xF) { |
196 |
case POWERPC_EXCP_FP_OX:
|
197 |
info.si_code = FPE_FLTOVF; |
198 |
break;
|
199 |
case POWERPC_EXCP_FP_UX:
|
200 |
info.si_code = FPE_FLTUND; |
201 |
break;
|
202 |
case POWERPC_EXCP_FP_ZX:
|
203 |
case POWERPC_EXCP_FP_VXZDZ:
|
204 |
info.si_code = FPE_FLTDIV; |
205 |
break;
|
206 |
case POWERPC_EXCP_FP_XX:
|
207 |
info.si_code = FPE_FLTRES; |
208 |
break;
|
209 |
case POWERPC_EXCP_FP_VXSOFT:
|
210 |
info.si_code = FPE_FLTINV; |
211 |
break;
|
212 |
case POWERPC_EXCP_FP_VXSNAN:
|
213 |
case POWERPC_EXCP_FP_VXISI:
|
214 |
case POWERPC_EXCP_FP_VXIDI:
|
215 |
case POWERPC_EXCP_FP_VXIMZ:
|
216 |
case POWERPC_EXCP_FP_VXVC:
|
217 |
case POWERPC_EXCP_FP_VXSQRT:
|
218 |
case POWERPC_EXCP_FP_VXCVI:
|
219 |
info.si_code = FPE_FLTSUB; |
220 |
break;
|
221 |
default:
|
222 |
EXCP_DUMP(env, "Unknown floating point exception (%02x)\n",
|
223 |
env->error_code); |
224 |
break;
|
225 |
} |
226 |
break;
|
227 |
case POWERPC_EXCP_INVAL:
|
228 |
EXCP_DUMP(env, "Invalid instruction\n");
|
229 |
info.si_signo = SIGILL; |
230 |
info.si_errno = 0;
|
231 |
switch (env->error_code & 0xF) { |
232 |
case POWERPC_EXCP_INVAL_INVAL:
|
233 |
info.si_code = ILL_ILLOPC; |
234 |
break;
|
235 |
case POWERPC_EXCP_INVAL_LSWX:
|
236 |
info.si_code = ILL_ILLOPN; |
237 |
break;
|
238 |
case POWERPC_EXCP_INVAL_SPR:
|
239 |
info.si_code = ILL_PRVREG; |
240 |
break;
|
241 |
case POWERPC_EXCP_INVAL_FP:
|
242 |
info.si_code = ILL_COPROC; |
243 |
break;
|
244 |
default:
|
245 |
EXCP_DUMP(env, "Unknown invalid operation (%02x)\n",
|
246 |
env->error_code & 0xF);
|
247 |
info.si_code = ILL_ILLADR; |
248 |
break;
|
249 |
} |
250 |
/* Handle this via the gdb */
|
251 |
gdb_handlesig (env, SIGSEGV); |
252 |
break;
|
253 |
case POWERPC_EXCP_PRIV:
|
254 |
EXCP_DUMP(env, "Privilege violation\n");
|
255 |
info.si_signo = SIGILL; |
256 |
info.si_errno = 0;
|
257 |
switch (env->error_code & 0xF) { |
258 |
case POWERPC_EXCP_PRIV_OPC:
|
259 |
info.si_code = ILL_PRVOPC; |
260 |
break;
|
261 |
case POWERPC_EXCP_PRIV_REG:
|
262 |
info.si_code = ILL_PRVREG; |
263 |
break;
|
264 |
default:
|
265 |
EXCP_DUMP(env, "Unknown privilege violation (%02x)\n",
|
266 |
env->error_code & 0xF);
|
267 |
info.si_code = ILL_PRVOPC; |
268 |
break;
|
269 |
} |
270 |
break;
|
271 |
case POWERPC_EXCP_TRAP:
|
272 |
cpu_abort(env, "Tried to call a TRAP\n");
|
273 |
break;
|
274 |
default:
|
275 |
/* Should not happen ! */
|
276 |
cpu_abort(env, "Unknown program exception (%02x)\n",
|
277 |
env->error_code); |
278 |
break;
|
279 |
} |
280 |
info.si_addr = (void*)(env->nip - 4); |
281 |
queue_signal(info.si_signo, &info); |
282 |
break;
|
283 |
case POWERPC_EXCP_FPU: /* Floating-point unavailable exception */ |
284 |
EXCP_DUMP(env, "No floating point allowed\n");
|
285 |
info.si_signo = SIGILL; |
286 |
info.si_errno = 0;
|
287 |
info.si_code = ILL_COPROC; |
288 |
info.si_addr = (void*)(env->nip - 4); |
289 |
queue_signal(info.si_signo, &info); |
290 |
break;
|
291 |
case POWERPC_EXCP_SYSCALL: /* System call exception */ |
292 |
cpu_abort(env, "Syscall exception while in user mode. "
|
293 |
"Aborting\n");
|
294 |
break;
|
295 |
case POWERPC_EXCP_APU: /* Auxiliary processor unavailable */ |
296 |
EXCP_DUMP(env, "No APU instruction allowed\n");
|
297 |
info.si_signo = SIGILL; |
298 |
info.si_errno = 0;
|
299 |
info.si_code = ILL_COPROC; |
300 |
info.si_addr = (void*)(env->nip - 4); |
301 |
queue_signal(info.si_signo, &info); |
302 |
break;
|
303 |
case POWERPC_EXCP_DECR: /* Decrementer exception */ |
304 |
cpu_abort(env, "Decrementer interrupt while in user mode. "
|
305 |
"Aborting\n");
|
306 |
break;
|
307 |
case POWERPC_EXCP_FIT: /* Fixed-interval timer interrupt */ |
308 |
cpu_abort(env, "Fix interval timer interrupt while in user mode. "
|
309 |
"Aborting\n");
|
310 |
break;
|
311 |
case POWERPC_EXCP_WDT: /* Watchdog timer interrupt */ |
312 |
cpu_abort(env, "Watchdog timer interrupt while in user mode. "
|
313 |
"Aborting\n");
|
314 |
break;
|
315 |
case POWERPC_EXCP_DTLB: /* Data TLB error */ |
316 |
cpu_abort(env, "Data TLB exception while in user mode. "
|
317 |
"Aborting\n");
|
318 |
break;
|
319 |
case POWERPC_EXCP_ITLB: /* Instruction TLB error */ |
320 |
cpu_abort(env, "Instruction TLB exception while in user mode. "
|
321 |
"Aborting\n");
|
322 |
break;
|
323 |
case POWERPC_EXCP_DEBUG: /* Debug interrupt */ |
324 |
gdb_handlesig (env, SIGTRAP); |
325 |
break;
|
326 |
case POWERPC_EXCP_SPEU: /* SPE/embedded floating-point unavail. */ |
327 |
EXCP_DUMP(env, "No SPE/floating-point instruction allowed\n");
|
328 |
info.si_signo = SIGILL; |
329 |
info.si_errno = 0;
|
330 |
info.si_code = ILL_COPROC; |
331 |
info.si_addr = (void*)(env->nip - 4); |
332 |
queue_signal(info.si_signo, &info); |
333 |
break;
|
334 |
case POWERPC_EXCP_EFPDI: /* Embedded floating-point data IRQ */ |
335 |
cpu_abort(env, "Embedded floating-point data IRQ not handled\n");
|
336 |
break;
|
337 |
case POWERPC_EXCP_EFPRI: /* Embedded floating-point round IRQ */ |
338 |
cpu_abort(env, "Embedded floating-point round IRQ not handled\n");
|
339 |
break;
|
340 |
case POWERPC_EXCP_EPERFM: /* Embedded performance monitor IRQ */ |
341 |
cpu_abort(env, "Performance monitor exception not handled\n");
|
342 |
break;
|
343 |
case POWERPC_EXCP_DOORI: /* Embedded doorbell interrupt */ |
344 |
cpu_abort(env, "Doorbell interrupt while in user mode. "
|
345 |
"Aborting\n");
|
346 |
break;
|
347 |
case POWERPC_EXCP_DOORCI: /* Embedded doorbell critical interrupt */ |
348 |
cpu_abort(env, "Doorbell critical interrupt while in user mode. "
|
349 |
"Aborting\n");
|
350 |
break;
|
351 |
case POWERPC_EXCP_RESET: /* System reset exception */ |
352 |
cpu_abort(env, "Reset interrupt while in user mode. "
|
353 |
"Aborting\n");
|
354 |
break;
|
355 |
case POWERPC_EXCP_DSEG: /* Data segment exception */ |
356 |
cpu_abort(env, "Data segment exception while in user mode. "
|
357 |
"Aborting\n");
|
358 |
break;
|
359 |
case POWERPC_EXCP_ISEG: /* Instruction segment exception */ |
360 |
cpu_abort(env, "Instruction segment exception "
|
361 |
"while in user mode. Aborting\n");
|
362 |
break;
|
363 |
case POWERPC_EXCP_HDECR: /* Hypervisor decrementer exception */ |
364 |
cpu_abort(env, "Hypervisor decrementer interrupt "
|
365 |
"while in user mode. Aborting\n");
|
366 |
break;
|
367 |
case POWERPC_EXCP_TRACE: /* Trace exception */ |
368 |
/* Nothing to do:
|
369 |
* we use this exception to emulate step-by-step execution mode.
|
370 |
*/
|
371 |
break;
|
372 |
case POWERPC_EXCP_HDSI: /* Hypervisor data storage exception */ |
373 |
cpu_abort(env, "Hypervisor data storage exception "
|
374 |
"while in user mode. Aborting\n");
|
375 |
break;
|
376 |
case POWERPC_EXCP_HISI: /* Hypervisor instruction storage excp */ |
377 |
cpu_abort(env, "Hypervisor instruction storage exception "
|
378 |
"while in user mode. Aborting\n");
|
379 |
break;
|
380 |
case POWERPC_EXCP_HDSEG: /* Hypervisor data segment exception */ |
381 |
cpu_abort(env, "Hypervisor data segment exception "
|
382 |
"while in user mode. Aborting\n");
|
383 |
break;
|
384 |
case POWERPC_EXCP_HISEG: /* Hypervisor instruction segment excp */ |
385 |
cpu_abort(env, "Hypervisor instruction segment exception "
|
386 |
"while in user mode. Aborting\n");
|
387 |
break;
|
388 |
case POWERPC_EXCP_VPU: /* Vector unavailable exception */ |
389 |
EXCP_DUMP(env, "No Altivec instructions allowed\n");
|
390 |
info.si_signo = SIGILL; |
391 |
info.si_errno = 0;
|
392 |
info.si_code = ILL_COPROC; |
393 |
info.si_addr = (void*)(env->nip - 4); |
394 |
queue_signal(info.si_signo, &info); |
395 |
break;
|
396 |
case POWERPC_EXCP_PIT: /* Programmable interval timer IRQ */ |
397 |
cpu_abort(env, "Programmable interval timer interrupt "
|
398 |
"while in user mode. Aborting\n");
|
399 |
break;
|
400 |
case POWERPC_EXCP_IO: /* IO error exception */ |
401 |
cpu_abort(env, "IO error exception while in user mode. "
|
402 |
"Aborting\n");
|
403 |
break;
|
404 |
case POWERPC_EXCP_RUNM: /* Run mode exception */ |
405 |
cpu_abort(env, "Run mode exception while in user mode. "
|
406 |
"Aborting\n");
|
407 |
break;
|
408 |
case POWERPC_EXCP_EMUL: /* Emulation trap exception */ |
409 |
cpu_abort(env, "Emulation trap exception not handled\n");
|
410 |
break;
|
411 |
case POWERPC_EXCP_IFTLB: /* Instruction fetch TLB error */ |
412 |
cpu_abort(env, "Instruction fetch TLB exception "
|
413 |
"while in user-mode. Aborting");
|
414 |
break;
|
415 |
case POWERPC_EXCP_DLTLB: /* Data load TLB miss */ |
416 |
cpu_abort(env, "Data load TLB exception while in user-mode. "
|
417 |
"Aborting");
|
418 |
break;
|
419 |
case POWERPC_EXCP_DSTLB: /* Data store TLB miss */ |
420 |
cpu_abort(env, "Data store TLB exception while in user-mode. "
|
421 |
"Aborting");
|
422 |
break;
|
423 |
case POWERPC_EXCP_FPA: /* Floating-point assist exception */ |
424 |
cpu_abort(env, "Floating-point assist exception not handled\n");
|
425 |
break;
|
426 |
case POWERPC_EXCP_IABR: /* Instruction address breakpoint */ |
427 |
cpu_abort(env, "Instruction address breakpoint exception "
|
428 |
"not handled\n");
|
429 |
break;
|
430 |
case POWERPC_EXCP_SMI: /* System management interrupt */ |
431 |
cpu_abort(env, "System management interrupt while in user mode. "
|
432 |
"Aborting\n");
|
433 |
break;
|
434 |
case POWERPC_EXCP_THERM: /* Thermal interrupt */ |
435 |
cpu_abort(env, "Thermal interrupt interrupt while in user mode. "
|
436 |
"Aborting\n");
|
437 |
break;
|
438 |
case POWERPC_EXCP_PERFM: /* Embedded performance monitor IRQ */ |
439 |
cpu_abort(env, "Performance monitor exception not handled\n");
|
440 |
break;
|
441 |
case POWERPC_EXCP_VPUA: /* Vector assist exception */ |
442 |
cpu_abort(env, "Vector assist exception not handled\n");
|
443 |
break;
|
444 |
case POWERPC_EXCP_SOFTP: /* Soft patch exception */ |
445 |
cpu_abort(env, "Soft patch exception not handled\n");
|
446 |
break;
|
447 |
case POWERPC_EXCP_MAINT: /* Maintenance exception */ |
448 |
cpu_abort(env, "Maintenance exception while in user mode. "
|
449 |
"Aborting\n");
|
450 |
break;
|
451 |
case POWERPC_EXCP_STOP: /* stop translation */ |
452 |
/* We did invalidate the instruction cache. Go on */
|
453 |
break;
|
454 |
case POWERPC_EXCP_BRANCH: /* branch instruction: */ |
455 |
/* We just stopped because of a branch. Go on */
|
456 |
break;
|
457 |
case POWERPC_EXCP_SYSCALL_USER:
|
458 |
/* system call in user-mode emulation */
|
459 |
/* system call */
|
460 |
if(((int)env->gpr[0]) <= SYS_MAXSYSCALL && ((int)env->gpr[0])>0) |
461 |
ret = do_unix_syscall(env, env->gpr[0]/*, env->gpr[3], env->gpr[4], |
462 |
env->gpr[5], env->gpr[6], env->gpr[7],
|
463 |
env->gpr[8], env->gpr[9], env->gpr[10]*/);
|
464 |
else if(((int)env->gpr[0])<0) |
465 |
ret = do_mach_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4], |
466 |
env->gpr[5], env->gpr[6], env->gpr[7], |
467 |
env->gpr[8], env->gpr[9], env->gpr[10]); |
468 |
else
|
469 |
ret = do_thread_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4], |
470 |
env->gpr[5], env->gpr[6], env->gpr[7], |
471 |
env->gpr[8], env->gpr[9], env->gpr[10]); |
472 |
|
473 |
/* Unix syscall error signaling */
|
474 |
if(((int)env->gpr[0]) <= SYS_MAXSYSCALL && ((int)env->gpr[0])>0) |
475 |
{ |
476 |
if( (int)ret < 0 ) |
477 |
env->nip += 0;
|
478 |
else
|
479 |
env->nip += 4;
|
480 |
} |
481 |
|
482 |
/* Return value */
|
483 |
env->gpr[3] = ret;
|
484 |
break;
|
485 |
case EXCP_INTERRUPT:
|
486 |
/* just indicate that signals should be handled asap */
|
487 |
break;
|
488 |
default:
|
489 |
cpu_abort(env, "Unknown exception 0x%d. Aborting\n", trapnr);
|
490 |
break;
|
491 |
} |
492 |
process_pending_signals(env); |
493 |
} |
494 |
} |
495 |
#endif
|
496 |
|
497 |
|
498 |
#ifdef TARGET_I386
|
499 |
|
500 |
/***********************************************************/
|
501 |
/* CPUX86 core interface */
|
502 |
|
503 |
uint64_t cpu_get_tsc(CPUX86State *env) |
504 |
{ |
505 |
return cpu_get_real_ticks();
|
506 |
} |
507 |
|
508 |
void
|
509 |
write_dt(void *ptr, unsigned long addr, unsigned long limit, |
510 |
int flags)
|
511 |
{ |
512 |
unsigned int e1, e2; |
513 |
e1 = (addr << 16) | (limit & 0xffff); |
514 |
e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000); |
515 |
e2 |= flags; |
516 |
stl((uint8_t *)ptr, e1); |
517 |
stl((uint8_t *)ptr + 4, e2);
|
518 |
} |
519 |
|
520 |
static void set_gate(void *ptr, unsigned int type, unsigned int dpl, |
521 |
unsigned long addr, unsigned int sel) |
522 |
{ |
523 |
unsigned int e1, e2; |
524 |
e1 = (addr & 0xffff) | (sel << 16); |
525 |
e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8); |
526 |
stl((uint8_t *)ptr, e1); |
527 |
stl((uint8_t *)ptr + 4, e2);
|
528 |
} |
529 |
|
530 |
#define GDT_TABLE_SIZE 14 |
531 |
#define LDT_TABLE_SIZE 15 |
532 |
#define IDT_TABLE_SIZE 256 |
533 |
#define TSS_SIZE 104 |
534 |
uint64_t gdt_table[GDT_TABLE_SIZE]; |
535 |
uint64_t ldt_table[LDT_TABLE_SIZE]; |
536 |
uint64_t idt_table[IDT_TABLE_SIZE]; |
537 |
uint32_t tss[TSS_SIZE]; |
538 |
|
539 |
/* only dpl matters as we do only user space emulation */
|
540 |
static void set_idt(int n, unsigned int dpl) |
541 |
{ |
542 |
set_gate(idt_table + n, 0, dpl, 0, 0); |
543 |
} |
544 |
|
545 |
/* ABI convention: after a syscall if there was an error the CF flag is set */
|
546 |
static inline void set_error(CPUX86State *env, int ret) |
547 |
{ |
548 |
if(ret<0) |
549 |
env->eflags = env->eflags | 0x1;
|
550 |
else
|
551 |
env->eflags &= ~0x1;
|
552 |
env->regs[R_EAX] = ret; |
553 |
} |
554 |
|
555 |
void cpu_loop(CPUX86State *env)
|
556 |
{ |
557 |
int trapnr;
|
558 |
int ret;
|
559 |
uint8_t *pc; |
560 |
target_siginfo_t info; |
561 |
|
562 |
for(;;) {
|
563 |
trapnr = cpu_x86_exec(env); |
564 |
uint32_t *params = (uint32_t *)env->regs[R_ESP]; |
565 |
switch(trapnr) {
|
566 |
case 0x79: /* Our commpage hack back door exit is here */ |
567 |
do_commpage(env, env->eip, *(params + 1), *(params + 2), |
568 |
*(params + 3), *(params + 4), |
569 |
*(params + 5), *(params + 6), |
570 |
*(params + 7), *(params + 8)); |
571 |
break;
|
572 |
case 0x81: /* mach syscall */ |
573 |
{ |
574 |
ret = do_mach_syscall(env, env->regs[R_EAX], |
575 |
*(params + 1), *(params + 2), |
576 |
*(params + 3), *(params + 4), |
577 |
*(params + 5), *(params + 6), |
578 |
*(params + 7), *(params + 8)); |
579 |
set_error(env, ret); |
580 |
break;
|
581 |
} |
582 |
case 0x90: /* unix backdoor */ |
583 |
{ |
584 |
/* after sysenter, stack is in R_ECX, new eip in R_EDX (sysexit will flip them back)*/
|
585 |
int saved_stack = env->regs[R_ESP];
|
586 |
env->regs[R_ESP] = env->regs[R_ECX]; |
587 |
|
588 |
ret = do_unix_syscall(env, env->regs[R_EAX]); |
589 |
|
590 |
env->regs[R_ECX] = env->regs[R_ESP]; |
591 |
env->regs[R_ESP] = saved_stack; |
592 |
|
593 |
set_error(env, ret); |
594 |
break;
|
595 |
} |
596 |
case 0x80: /* unix syscall */ |
597 |
{ |
598 |
ret = do_unix_syscall(env, env->regs[R_EAX]/*,
|
599 |
*(params + 1), *(params + 2),
|
600 |
*(params + 3), *(params + 4),
|
601 |
*(params + 5), *(params + 6),
|
602 |
*(params + 7), *(params + 8)*/);
|
603 |
set_error(env, ret); |
604 |
break;
|
605 |
} |
606 |
case 0x82: /* thread syscall */ |
607 |
{ |
608 |
ret = do_thread_syscall(env, env->regs[R_EAX], |
609 |
*(params + 1), *(params + 2), |
610 |
*(params + 3), *(params + 4), |
611 |
*(params + 5), *(params + 6), |
612 |
*(params + 7), *(params + 8)); |
613 |
set_error(env, ret); |
614 |
break;
|
615 |
} |
616 |
case EXCP0B_NOSEG:
|
617 |
case EXCP0C_STACK:
|
618 |
info.si_signo = SIGBUS; |
619 |
info.si_errno = 0;
|
620 |
info.si_code = BUS_NOOP; |
621 |
info.si_addr = 0;
|
622 |
gdb_handlesig (env, SIGBUS); |
623 |
queue_signal(info.si_signo, &info); |
624 |
break;
|
625 |
case EXCP0D_GPF:
|
626 |
info.si_signo = SIGSEGV; |
627 |
info.si_errno = 0;
|
628 |
info.si_code = SEGV_NOOP; |
629 |
info.si_addr = 0;
|
630 |
gdb_handlesig (env, SIGSEGV); |
631 |
queue_signal(info.si_signo, &info); |
632 |
break;
|
633 |
case EXCP0E_PAGE:
|
634 |
info.si_signo = SIGSEGV; |
635 |
info.si_errno = 0;
|
636 |
if (!(env->error_code & 1)) |
637 |
info.si_code = SEGV_MAPERR; |
638 |
else
|
639 |
info.si_code = SEGV_ACCERR; |
640 |
info.si_addr = (void*)env->cr[2]; |
641 |
gdb_handlesig (env, SIGSEGV); |
642 |
queue_signal(info.si_signo, &info); |
643 |
break;
|
644 |
case EXCP00_DIVZ:
|
645 |
/* division by zero */
|
646 |
info.si_signo = SIGFPE; |
647 |
info.si_errno = 0;
|
648 |
info.si_code = FPE_INTDIV; |
649 |
info.si_addr = (void*)env->eip;
|
650 |
gdb_handlesig (env, SIGFPE); |
651 |
queue_signal(info.si_signo, &info); |
652 |
break;
|
653 |
case EXCP01_SSTP:
|
654 |
case EXCP03_INT3:
|
655 |
info.si_signo = SIGTRAP; |
656 |
info.si_errno = 0;
|
657 |
info.si_code = TRAP_BRKPT; |
658 |
info.si_addr = (void*)env->eip;
|
659 |
gdb_handlesig (env, SIGTRAP); |
660 |
queue_signal(info.si_signo, &info); |
661 |
break;
|
662 |
case EXCP04_INTO:
|
663 |
case EXCP05_BOUND:
|
664 |
info.si_signo = SIGSEGV; |
665 |
info.si_errno = 0;
|
666 |
info.si_code = SEGV_NOOP; |
667 |
info.si_addr = 0;
|
668 |
gdb_handlesig (env, SIGSEGV); |
669 |
queue_signal(info.si_signo, &info); |
670 |
break;
|
671 |
case EXCP06_ILLOP:
|
672 |
info.si_signo = SIGILL; |
673 |
info.si_errno = 0;
|
674 |
info.si_code = ILL_ILLOPN; |
675 |
info.si_addr = (void*)env->eip;
|
676 |
gdb_handlesig (env, SIGILL); |
677 |
queue_signal(info.si_signo, &info); |
678 |
break;
|
679 |
case EXCP_INTERRUPT:
|
680 |
/* just indicate that signals should be handled asap */
|
681 |
break;
|
682 |
case EXCP_DEBUG:
|
683 |
{ |
684 |
int sig;
|
685 |
|
686 |
sig = gdb_handlesig (env, SIGTRAP); |
687 |
if (sig)
|
688 |
{ |
689 |
info.si_signo = sig; |
690 |
info.si_errno = 0;
|
691 |
info.si_code = TRAP_BRKPT; |
692 |
queue_signal(info.si_signo, &info); |
693 |
} |
694 |
} |
695 |
break;
|
696 |
default:
|
697 |
pc = (void*)(env->segs[R_CS].base + env->eip);
|
698 |
fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
|
699 |
(long)pc, trapnr);
|
700 |
abort(); |
701 |
} |
702 |
process_pending_signals(env); |
703 |
} |
704 |
} |
705 |
#endif
|
706 |
|
707 |
static void usage(void) |
708 |
{ |
709 |
printf("qemu-" TARGET_ARCH " version " QEMU_VERSION ", Copyright (c) 2003-2004 Fabrice Bellard\n" |
710 |
"usage: qemu-" TARGET_ARCH " [-h] [-d opts] [-L path] [-s size] program [arguments...]\n" |
711 |
"Darwin CPU emulator (compiled for %s emulation)\n"
|
712 |
"\n"
|
713 |
"-h print this help\n"
|
714 |
"-L path set the %s library path (default='%s')\n"
|
715 |
"-s size set the stack size in bytes (default=%ld)\n"
|
716 |
"\n"
|
717 |
"debug options:\n"
|
718 |
"-d options activate log (logfile='%s')\n"
|
719 |
"-g wait for gdb on port 1234\n"
|
720 |
"-p pagesize set the host page size to 'pagesize'\n",
|
721 |
"-singlestep always run in singlestep mode\n"
|
722 |
TARGET_ARCH, |
723 |
TARGET_ARCH, |
724 |
interp_prefix, |
725 |
stack_size, |
726 |
DEBUG_LOGFILE); |
727 |
exit(1);
|
728 |
} |
729 |
|
730 |
/* XXX: currently only used for async signals (see signal.c) */
|
731 |
CPUState *global_env; |
732 |
|
733 |
/* used to free thread contexts */
|
734 |
TaskState *first_task_state; |
735 |
|
736 |
int main(int argc, char **argv) |
737 |
{ |
738 |
const char *filename; |
739 |
const char *log_file = DEBUG_LOGFILE; |
740 |
const char *log_mask = NULL; |
741 |
struct target_pt_regs regs1, *regs = ®s1;
|
742 |
TaskState ts1, *ts = &ts1; |
743 |
CPUState *env; |
744 |
int optind;
|
745 |
short use_gdbstub = 0; |
746 |
const char *r; |
747 |
const char *cpu_model; |
748 |
|
749 |
if (argc <= 1) |
750 |
usage(); |
751 |
|
752 |
optind = 1;
|
753 |
for(;;) {
|
754 |
if (optind >= argc)
|
755 |
break;
|
756 |
r = argv[optind]; |
757 |
if (r[0] != '-') |
758 |
break;
|
759 |
optind++; |
760 |
r++; |
761 |
if (!strcmp(r, "-")) { |
762 |
break;
|
763 |
} else if (!strcmp(r, "d")) { |
764 |
if (optind >= argc) {
|
765 |
break;
|
766 |
} |
767 |
log_mask = argv[optind++]; |
768 |
} else if (!strcmp(r, "D")) { |
769 |
if (optind >= argc) {
|
770 |
break;
|
771 |
} |
772 |
log_file = argv[optind++]; |
773 |
} else if (!strcmp(r, "s")) { |
774 |
r = argv[optind++]; |
775 |
stack_size = strtol(r, (char **)&r, 0); |
776 |
if (stack_size <= 0) |
777 |
usage(); |
778 |
if (*r == 'M') |
779 |
stack_size *= 1024 * 1024; |
780 |
else if (*r == 'k' || *r == 'K') |
781 |
stack_size *= 1024;
|
782 |
} else if (!strcmp(r, "L")) { |
783 |
interp_prefix = argv[optind++]; |
784 |
} else if (!strcmp(r, "p")) { |
785 |
qemu_host_page_size = atoi(argv[optind++]); |
786 |
if (qemu_host_page_size == 0 || |
787 |
(qemu_host_page_size & (qemu_host_page_size - 1)) != 0) { |
788 |
fprintf(stderr, "page size must be a power of two\n");
|
789 |
exit(1);
|
790 |
} |
791 |
} else
|
792 |
if (!strcmp(r, "g")) { |
793 |
use_gdbstub = 1;
|
794 |
} else if (!strcmp(r, "cpu")) { |
795 |
cpu_model = argv[optind++]; |
796 |
if (strcmp(cpu_model, "?") == 0) { |
797 |
/* XXX: implement xxx_cpu_list for targets that still miss it */
|
798 |
#if defined(cpu_list)
|
799 |
cpu_list(stdout, &fprintf); |
800 |
#endif
|
801 |
exit(1);
|
802 |
} |
803 |
} else if (!strcmp(r, "singlestep")) { |
804 |
singlestep = 1;
|
805 |
} else
|
806 |
{ |
807 |
usage(); |
808 |
} |
809 |
} |
810 |
|
811 |
/* init debug */
|
812 |
cpu_set_log_filename(log_file); |
813 |
if (log_mask) {
|
814 |
int mask;
|
815 |
CPULogItem *item; |
816 |
|
817 |
mask = cpu_str_to_log_mask(log_mask); |
818 |
if (!mask) {
|
819 |
printf("Log items (comma separated):\n");
|
820 |
for (item = cpu_log_items; item->mask != 0; item++) { |
821 |
printf("%-10s %s\n", item->name, item->help);
|
822 |
} |
823 |
exit(1);
|
824 |
} |
825 |
cpu_set_log(mask); |
826 |
} |
827 |
|
828 |
if (optind >= argc) {
|
829 |
usage(); |
830 |
} |
831 |
filename = argv[optind]; |
832 |
|
833 |
/* Zero out regs */
|
834 |
memset(regs, 0, sizeof(struct target_pt_regs)); |
835 |
|
836 |
if (cpu_model == NULL) { |
837 |
#if defined(TARGET_I386)
|
838 |
#ifdef TARGET_X86_64
|
839 |
cpu_model = "qemu64";
|
840 |
#else
|
841 |
cpu_model = "qemu32";
|
842 |
#endif
|
843 |
#elif defined(TARGET_PPC)
|
844 |
#ifdef TARGET_PPC64
|
845 |
cpu_model = "970";
|
846 |
#else
|
847 |
cpu_model = "750";
|
848 |
#endif
|
849 |
#else
|
850 |
#error unsupported CPU
|
851 |
#endif
|
852 |
} |
853 |
tcg_exec_init(0);
|
854 |
cpu_exec_init_all(); |
855 |
/* NOTE: we need to init the CPU at this stage to get
|
856 |
qemu_host_page_size */
|
857 |
env = cpu_init(cpu_model); |
858 |
cpu_reset(env); |
859 |
|
860 |
printf("Starting %s with qemu\n----------------\n", filename);
|
861 |
|
862 |
commpage_init(); |
863 |
|
864 |
if (mach_exec(filename, argv+optind, environ, regs) != 0) { |
865 |
printf("Error loading %s\n", filename);
|
866 |
_exit(1);
|
867 |
} |
868 |
|
869 |
syscall_init(); |
870 |
signal_init(); |
871 |
global_env = env; |
872 |
|
873 |
/* build Task State */
|
874 |
memset(ts, 0, sizeof(TaskState)); |
875 |
env->opaque = ts; |
876 |
ts->used = 1;
|
877 |
|
878 |
#if defined(TARGET_I386)
|
879 |
cpu_x86_set_cpl(env, 3);
|
880 |
|
881 |
env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
|
882 |
env->hflags |= HF_PE_MASK; |
883 |
|
884 |
if (env->cpuid_features & CPUID_SSE) {
|
885 |
env->cr[4] |= CR4_OSFXSR_MASK;
|
886 |
env->hflags |= HF_OSFXSR_MASK; |
887 |
} |
888 |
|
889 |
/* flags setup : we activate the IRQs by default as in user mode */
|
890 |
env->eflags |= IF_MASK; |
891 |
|
892 |
/* darwin register setup */
|
893 |
env->regs[R_EAX] = regs->eax; |
894 |
env->regs[R_EBX] = regs->ebx; |
895 |
env->regs[R_ECX] = regs->ecx; |
896 |
env->regs[R_EDX] = regs->edx; |
897 |
env->regs[R_ESI] = regs->esi; |
898 |
env->regs[R_EDI] = regs->edi; |
899 |
env->regs[R_EBP] = regs->ebp; |
900 |
env->regs[R_ESP] = regs->esp; |
901 |
env->eip = regs->eip; |
902 |
|
903 |
/* Darwin LDT setup */
|
904 |
/* 2 - User code segment
|
905 |
3 - User data segment
|
906 |
4 - User cthread */
|
907 |
bzero(ldt_table, LDT_TABLE_SIZE * sizeof(ldt_table[0])); |
908 |
env->ldt.base = (uint32_t) ldt_table; |
909 |
env->ldt.limit = sizeof(ldt_table) - 1; |
910 |
|
911 |
write_dt(ldt_table + 2, 0, 0xfffff, |
912 |
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | |
913 |
(3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT)); |
914 |
write_dt(ldt_table + 3, 0, 0xfffff, |
915 |
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | |
916 |
(3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT)); |
917 |
write_dt(ldt_table + 4, 0, 0xfffff, |
918 |
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | |
919 |
(3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT)); |
920 |
|
921 |
/* Darwin GDT setup.
|
922 |
* has changed a lot between old Darwin/x86 (pre-Mac Intel) and Mac OS X/x86,
|
923 |
now everything is done via int 0x81(mach) int 0x82 (thread) and sysenter/sysexit(unix) */
|
924 |
bzero(gdt_table, sizeof(gdt_table));
|
925 |
env->gdt.base = (uint32_t)gdt_table; |
926 |
env->gdt.limit = sizeof(gdt_table) - 1; |
927 |
|
928 |
/* Set up a back door to handle sysenter syscalls (unix) */
|
929 |
char * syscallbackdoor = malloc(64); |
930 |
page_set_flags((int)syscallbackdoor, (int)syscallbackdoor + 64, PROT_EXEC | PROT_READ | PAGE_VALID); |
931 |
|
932 |
int i = 0; |
933 |
syscallbackdoor[i++] = 0xcd;
|
934 |
syscallbackdoor[i++] = 0x90; /* int 0x90 */ |
935 |
syscallbackdoor[i++] = 0x0F;
|
936 |
syscallbackdoor[i++] = 0x35; /* sysexit */ |
937 |
|
938 |
/* Darwin sysenter/sysexit setup */
|
939 |
env->sysenter_cs = 0x1; //XXX |
940 |
env->sysenter_eip = (int)syscallbackdoor;
|
941 |
env->sysenter_esp = (int)malloc(64); |
942 |
|
943 |
/* Darwin TSS setup
|
944 |
This must match up with GDT[4] */
|
945 |
env->tr.base = (uint32_t) tss; |
946 |
env->tr.limit = sizeof(tss) - 1; |
947 |
env->tr.flags = DESC_P_MASK | (0x9 << DESC_TYPE_SHIFT);
|
948 |
stw(tss + 2, 0x10); // ss0 = 0x10 = GDT[2] = Kernel Data Segment |
949 |
|
950 |
/* Darwin interrupt setup */
|
951 |
bzero(idt_table, sizeof(idt_table));
|
952 |
env->idt.base = (uint32_t) idt_table; |
953 |
env->idt.limit = sizeof(idt_table) - 1; |
954 |
set_idt(0, 0); |
955 |
set_idt(1, 0); |
956 |
set_idt(2, 0); |
957 |
set_idt(3, 3); |
958 |
set_idt(4, 3); |
959 |
set_idt(5, 3); |
960 |
set_idt(6, 0); |
961 |
set_idt(7, 0); |
962 |
set_idt(8, 0); |
963 |
set_idt(9, 0); |
964 |
set_idt(10, 0); |
965 |
set_idt(11, 0); |
966 |
set_idt(12, 0); |
967 |
set_idt(13, 0); |
968 |
set_idt(14, 0); |
969 |
set_idt(15, 0); |
970 |
set_idt(16, 0); |
971 |
set_idt(17, 0); |
972 |
set_idt(18, 0); |
973 |
set_idt(19, 0); |
974 |
/* Syscalls are done via
|
975 |
int 0x80 (unix) (rarely used)
|
976 |
int 0x81 (mach)
|
977 |
int 0x82 (thread)
|
978 |
int 0x83 (diag) (not handled here)
|
979 |
sysenter/sysexit (unix) -> we redirect that to int 0x90 */
|
980 |
set_idt(0x79, 3); /* Commpage hack, here is our backdoor interrupt */ |
981 |
set_idt(0x80, 3); /* Unix Syscall */ |
982 |
set_idt(0x81, 3); /* Mach Syscalls */ |
983 |
set_idt(0x82, 3); /* thread Syscalls */ |
984 |
|
985 |
set_idt(0x90, 3); /* qemu-darwin-user's Unix syscalls backdoor */ |
986 |
|
987 |
|
988 |
cpu_x86_load_seg(env, R_CS, __USER_CS); |
989 |
cpu_x86_load_seg(env, R_DS, __USER_DS); |
990 |
cpu_x86_load_seg(env, R_ES, __USER_DS); |
991 |
cpu_x86_load_seg(env, R_SS, __USER_DS); |
992 |
cpu_x86_load_seg(env, R_FS, __USER_DS); |
993 |
cpu_x86_load_seg(env, R_GS, __USER_DS); |
994 |
|
995 |
#elif defined(TARGET_PPC)
|
996 |
{ |
997 |
int i;
|
998 |
|
999 |
#if defined(TARGET_PPC64)
|
1000 |
#if defined(TARGET_ABI32)
|
1001 |
env->msr &= ~((target_ulong)1 << MSR_SF);
|
1002 |
#else
|
1003 |
env->msr |= (target_ulong)1 << MSR_SF;
|
1004 |
#endif
|
1005 |
#endif
|
1006 |
env->nip = regs->nip; |
1007 |
for(i = 0; i < 32; i++) { |
1008 |
env->gpr[i] = regs->gpr[i]; |
1009 |
} |
1010 |
} |
1011 |
#else
|
1012 |
#error unsupported target CPU
|
1013 |
#endif
|
1014 |
|
1015 |
if (use_gdbstub) {
|
1016 |
printf("Waiting for gdb Connection on port 1234...\n");
|
1017 |
gdbserver_start (1234);
|
1018 |
gdb_handlesig(env, 0);
|
1019 |
} |
1020 |
|
1021 |
cpu_loop(env); |
1022 |
/* never exits */
|
1023 |
return 0; |
1024 |
} |