4 * Copyright (c) 2003 Fabrice Bellard
5 * Copyright (c) 2006 Pierre d'Herbemont
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.
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.
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/>.
27 #include <sys/syscall.h>
32 #define DEBUG_LOGFILE "/tmp/qemu.log"
35 #include <crt_externs.h>
36 # define environ (*_NSGetEnviron())
39 #include <mach/mach_init.h>
40 #include <mach/vm_map.h>
44 const char *interp_prefix = "";
46 asm(".zerofill __STD_PROG_ZONE, __STD_PROG_ZONE, __std_prog_zone, 0x0dfff000");
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;
53 void qerror(const char *fmt, ...)
58 vfprintf(stderr, fmt, ap);
60 fprintf(stderr, "\n");
64 void gemu_log(const char *fmt, ...)
69 vfprintf(stderr, fmt, ap);
73 int cpu_get_pic_interrupt(CPUState *env)
79 static inline uint64_t cpu_ppc_get_tb (CPUState *env)
85 uint64_t cpu_ppc_load_tbl (CPUState *env)
87 return cpu_ppc_get_tb(env);
90 uint32_t cpu_ppc_load_tbu (CPUState *env)
92 return cpu_ppc_get_tb(env) >> 32;
95 uint64_t cpu_ppc_load_atbl (CPUState *env)
97 return cpu_ppc_get_tb(env);
100 uint32_t cpu_ppc_load_atbu (CPUState *env)
102 return cpu_ppc_get_tb(env) >> 32;
105 uint32_t cpu_ppc601_load_rtcu (CPUState *env)
107 cpu_ppc_load_tbu(env);
110 uint32_t cpu_ppc601_load_rtcl (CPUState *env)
112 return cpu_ppc_load_tbl(env) & 0x3FFFFF80;
115 /* XXX: to be fixed */
116 int ppc_dcr_read (ppc_dcr_t *dcr_env, int dcrn, uint32_t *valp)
121 int ppc_dcr_write (ppc_dcr_t *dcr_env, int dcrn, uint32_t val)
126 #define EXCP_DUMP(env, fmt, ...) \
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); \
134 void cpu_loop(CPUPPCState *env)
138 target_siginfo_t info;
141 trapnr = cpu_ppc_exec(env);
143 case POWERPC_EXCP_NONE:
146 case POWERPC_EXCP_CRITICAL: /* Critical input */
147 cpu_abort(env, "Critical interrupt while in user mode. "
150 case POWERPC_EXCP_MCHECK: /* Machine check exception */
151 cpu_abort(env, "Machine check exception while in user mode. "
154 case POWERPC_EXCP_DSI: /* Data storage exception */
156 /* To deal with multiple qemu header version as host for the darwin-user code */
159 EXCP_DUMP(env, "Invalid data memory access: 0x" TARGET_FMT_lx "\n",
161 /* Handle this via the gdb */
162 gdb_handlesig (env, SIGSEGV);
164 info.si_addr = (void*)env->nip;
165 queue_signal(info.si_signo, &info);
167 case POWERPC_EXCP_ISI: /* Instruction storage exception */
168 EXCP_DUMP(env, "Invalid instruction fetch: 0x\n" TARGET_FMT_lx "\n",
170 /* Handle this via the gdb */
171 gdb_handlesig (env, SIGSEGV);
173 info.si_addr = (void*)(env->nip - 4);
174 queue_signal(info.si_signo, &info);
176 case POWERPC_EXCP_EXTERNAL: /* External input */
177 cpu_abort(env, "External interrupt while in user mode. "
180 case POWERPC_EXCP_ALIGN: /* Alignment exception */
181 EXCP_DUMP(env, "Unaligned memory access\n");
183 info.si_code = BUS_ADRALN;
184 info.si_addr = (void*)(env->nip - 4);
185 queue_signal(info.si_signo, &info);
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");
193 info.si_signo = SIGFPE;
195 switch (env->error_code & 0xF) {
196 case POWERPC_EXCP_FP_OX:
197 info.si_code = FPE_FLTOVF;
199 case POWERPC_EXCP_FP_UX:
200 info.si_code = FPE_FLTUND;
202 case POWERPC_EXCP_FP_ZX:
203 case POWERPC_EXCP_FP_VXZDZ:
204 info.si_code = FPE_FLTDIV;
206 case POWERPC_EXCP_FP_XX:
207 info.si_code = FPE_FLTRES;
209 case POWERPC_EXCP_FP_VXSOFT:
210 info.si_code = FPE_FLTINV;
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;
222 EXCP_DUMP(env, "Unknown floating point exception (%02x)\n",
227 case POWERPC_EXCP_INVAL:
228 EXCP_DUMP(env, "Invalid instruction\n");
229 info.si_signo = SIGILL;
231 switch (env->error_code & 0xF) {
232 case POWERPC_EXCP_INVAL_INVAL:
233 info.si_code = ILL_ILLOPC;
235 case POWERPC_EXCP_INVAL_LSWX:
236 info.si_code = ILL_ILLOPN;
238 case POWERPC_EXCP_INVAL_SPR:
239 info.si_code = ILL_PRVREG;
241 case POWERPC_EXCP_INVAL_FP:
242 info.si_code = ILL_COPROC;
245 EXCP_DUMP(env, "Unknown invalid operation (%02x)\n",
246 env->error_code & 0xF);
247 info.si_code = ILL_ILLADR;
250 /* Handle this via the gdb */
251 gdb_handlesig (env, SIGSEGV);
253 case POWERPC_EXCP_PRIV:
254 EXCP_DUMP(env, "Privilege violation\n");
255 info.si_signo = SIGILL;
257 switch (env->error_code & 0xF) {
258 case POWERPC_EXCP_PRIV_OPC:
259 info.si_code = ILL_PRVOPC;
261 case POWERPC_EXCP_PRIV_REG:
262 info.si_code = ILL_PRVREG;
265 EXCP_DUMP(env, "Unknown privilege violation (%02x)\n",
266 env->error_code & 0xF);
267 info.si_code = ILL_PRVOPC;
271 case POWERPC_EXCP_TRAP:
272 cpu_abort(env, "Tried to call a TRAP\n");
275 /* Should not happen ! */
276 cpu_abort(env, "Unknown program exception (%02x)\n",
280 info.si_addr = (void*)(env->nip - 4);
281 queue_signal(info.si_signo, &info);
283 case POWERPC_EXCP_FPU: /* Floating-point unavailable exception */
284 EXCP_DUMP(env, "No floating point allowed\n");
285 info.si_signo = SIGILL;
287 info.si_code = ILL_COPROC;
288 info.si_addr = (void*)(env->nip - 4);
289 queue_signal(info.si_signo, &info);
291 case POWERPC_EXCP_SYSCALL: /* System call exception */
292 cpu_abort(env, "Syscall exception while in user mode. "
295 case POWERPC_EXCP_APU: /* Auxiliary processor unavailable */
296 EXCP_DUMP(env, "No APU instruction allowed\n");
297 info.si_signo = SIGILL;
299 info.si_code = ILL_COPROC;
300 info.si_addr = (void*)(env->nip - 4);
301 queue_signal(info.si_signo, &info);
303 case POWERPC_EXCP_DECR: /* Decrementer exception */
304 cpu_abort(env, "Decrementer interrupt while in user mode. "
307 case POWERPC_EXCP_FIT: /* Fixed-interval timer interrupt */
308 cpu_abort(env, "Fix interval timer interrupt while in user mode. "
311 case POWERPC_EXCP_WDT: /* Watchdog timer interrupt */
312 cpu_abort(env, "Watchdog timer interrupt while in user mode. "
315 case POWERPC_EXCP_DTLB: /* Data TLB error */
316 cpu_abort(env, "Data TLB exception while in user mode. "
319 case POWERPC_EXCP_ITLB: /* Instruction TLB error */
320 cpu_abort(env, "Instruction TLB exception while in user mode. "
323 case POWERPC_EXCP_DEBUG: /* Debug interrupt */
324 gdb_handlesig (env, SIGTRAP);
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;
330 info.si_code = ILL_COPROC;
331 info.si_addr = (void*)(env->nip - 4);
332 queue_signal(info.si_signo, &info);
334 case POWERPC_EXCP_EFPDI: /* Embedded floating-point data IRQ */
335 cpu_abort(env, "Embedded floating-point data IRQ not handled\n");
337 case POWERPC_EXCP_EFPRI: /* Embedded floating-point round IRQ */
338 cpu_abort(env, "Embedded floating-point round IRQ not handled\n");
340 case POWERPC_EXCP_EPERFM: /* Embedded performance monitor IRQ */
341 cpu_abort(env, "Performance monitor exception not handled\n");
343 case POWERPC_EXCP_DOORI: /* Embedded doorbell interrupt */
344 cpu_abort(env, "Doorbell interrupt while in user mode. "
347 case POWERPC_EXCP_DOORCI: /* Embedded doorbell critical interrupt */
348 cpu_abort(env, "Doorbell critical interrupt while in user mode. "
351 case POWERPC_EXCP_RESET: /* System reset exception */
352 cpu_abort(env, "Reset interrupt while in user mode. "
355 case POWERPC_EXCP_DSEG: /* Data segment exception */
356 cpu_abort(env, "Data segment exception while in user mode. "
359 case POWERPC_EXCP_ISEG: /* Instruction segment exception */
360 cpu_abort(env, "Instruction segment exception "
361 "while in user mode. Aborting\n");
363 case POWERPC_EXCP_HDECR: /* Hypervisor decrementer exception */
364 cpu_abort(env, "Hypervisor decrementer interrupt "
365 "while in user mode. Aborting\n");
367 case POWERPC_EXCP_TRACE: /* Trace exception */
369 * we use this exception to emulate step-by-step execution mode.
372 case POWERPC_EXCP_HDSI: /* Hypervisor data storage exception */
373 cpu_abort(env, "Hypervisor data storage exception "
374 "while in user mode. Aborting\n");
376 case POWERPC_EXCP_HISI: /* Hypervisor instruction storage excp */
377 cpu_abort(env, "Hypervisor instruction storage exception "
378 "while in user mode. Aborting\n");
380 case POWERPC_EXCP_HDSEG: /* Hypervisor data segment exception */
381 cpu_abort(env, "Hypervisor data segment exception "
382 "while in user mode. Aborting\n");
384 case POWERPC_EXCP_HISEG: /* Hypervisor instruction segment excp */
385 cpu_abort(env, "Hypervisor instruction segment exception "
386 "while in user mode. Aborting\n");
388 case POWERPC_EXCP_VPU: /* Vector unavailable exception */
389 EXCP_DUMP(env, "No Altivec instructions allowed\n");
390 info.si_signo = SIGILL;
392 info.si_code = ILL_COPROC;
393 info.si_addr = (void*)(env->nip - 4);
394 queue_signal(info.si_signo, &info);
396 case POWERPC_EXCP_PIT: /* Programmable interval timer IRQ */
397 cpu_abort(env, "Programable interval timer interrupt "
398 "while in user mode. Aborting\n");
400 case POWERPC_EXCP_IO: /* IO error exception */
401 cpu_abort(env, "IO error exception while in user mode. "
404 case POWERPC_EXCP_RUNM: /* Run mode exception */
405 cpu_abort(env, "Run mode exception while in user mode. "
408 case POWERPC_EXCP_EMUL: /* Emulation trap exception */
409 cpu_abort(env, "Emulation trap exception not handled\n");
411 case POWERPC_EXCP_IFTLB: /* Instruction fetch TLB error */
412 cpu_abort(env, "Instruction fetch TLB exception "
413 "while in user-mode. Aborting");
415 case POWERPC_EXCP_DLTLB: /* Data load TLB miss */
416 cpu_abort(env, "Data load TLB exception while in user-mode. "
419 case POWERPC_EXCP_DSTLB: /* Data store TLB miss */
420 cpu_abort(env, "Data store TLB exception while in user-mode. "
423 case POWERPC_EXCP_FPA: /* Floating-point assist exception */
424 cpu_abort(env, "Floating-point assist exception not handled\n");
426 case POWERPC_EXCP_IABR: /* Instruction address breakpoint */
427 cpu_abort(env, "Instruction address breakpoint exception "
430 case POWERPC_EXCP_SMI: /* System management interrupt */
431 cpu_abort(env, "System management interrupt while in user mode. "
434 case POWERPC_EXCP_THERM: /* Thermal interrupt */
435 cpu_abort(env, "Thermal interrupt interrupt while in user mode. "
438 case POWERPC_EXCP_PERFM: /* Embedded performance monitor IRQ */
439 cpu_abort(env, "Performance monitor exception not handled\n");
441 case POWERPC_EXCP_VPUA: /* Vector assist exception */
442 cpu_abort(env, "Vector assist exception not handled\n");
444 case POWERPC_EXCP_SOFTP: /* Soft patch exception */
445 cpu_abort(env, "Soft patch exception not handled\n");
447 case POWERPC_EXCP_MAINT: /* Maintenance exception */
448 cpu_abort(env, "Maintenance exception while in user mode. "
451 case POWERPC_EXCP_STOP: /* stop translation */
452 /* We did invalidate the instruction cache. Go on */
454 case POWERPC_EXCP_BRANCH: /* branch instruction: */
455 /* We just stopped because of a branch. Go on */
457 case POWERPC_EXCP_SYSCALL_USER:
458 /* system call in user-mode emulation */
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]);
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]);
473 /* Unix syscall error signaling */
474 if(((int)env->gpr[0]) <= SYS_MAXSYSCALL && ((int)env->gpr[0])>0)
486 /* just indicate that signals should be handled asap */
489 cpu_abort(env, "Unknown exception 0x%d. Aborting\n", trapnr);
492 process_pending_signals(env);
500 /***********************************************************/
501 /* CPUX86 core interface */
503 uint64_t cpu_get_tsc(CPUX86State *env)
505 return cpu_get_real_ticks();
509 write_dt(void *ptr, unsigned long addr, unsigned long limit,
513 e1 = (addr << 16) | (limit & 0xffff);
514 e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
516 stl((uint8_t *)ptr, e1);
517 stl((uint8_t *)ptr + 4, e2);
520 static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
521 unsigned long addr, unsigned int sel)
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);
530 #define GDT_TABLE_SIZE 14
531 #define LDT_TABLE_SIZE 15
532 #define IDT_TABLE_SIZE 256
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];
539 /* only dpl matters as we do only user space emulation */
540 static void set_idt(int n, unsigned int dpl)
542 set_gate(idt_table + n, 0, dpl, 0, 0);
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)
549 env->eflags = env->eflags | 0x1;
552 env->regs[R_EAX] = ret;
555 void cpu_loop(CPUX86State *env)
560 target_siginfo_t info;
563 trapnr = cpu_x86_exec(env);
564 uint32_t *params = (uint32_t *)env->regs[R_ESP];
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));
572 case 0x81: /* mach syscall */
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));
582 case 0x90: /* unix backdoor */
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];
588 ret = do_unix_syscall(env, env->regs[R_EAX]);
590 env->regs[R_ECX] = env->regs[R_ESP];
591 env->regs[R_ESP] = saved_stack;
596 case 0x80: /* unix syscall */
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)*/);
606 case 0x82: /* thread syscall */
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));
618 info.si_signo = SIGBUS;
620 info.si_code = BUS_NOOP;
622 gdb_handlesig (env, SIGBUS);
623 queue_signal(info.si_signo, &info);
626 info.si_signo = SIGSEGV;
628 info.si_code = SEGV_NOOP;
630 gdb_handlesig (env, SIGSEGV);
631 queue_signal(info.si_signo, &info);
634 info.si_signo = SIGSEGV;
636 if (!(env->error_code & 1))
637 info.si_code = SEGV_MAPERR;
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);
645 /* division by zero */
646 info.si_signo = SIGFPE;
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);
655 info.si_signo = SIGTRAP;
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);
664 info.si_signo = SIGSEGV;
666 info.si_code = SEGV_NOOP;
668 gdb_handlesig (env, SIGSEGV);
669 queue_signal(info.si_signo, &info);
672 info.si_signo = SIGILL;
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);
680 /* just indicate that signals should be handled asap */
686 sig = gdb_handlesig (env, SIGTRAP);
691 info.si_code = TRAP_BRKPT;
692 queue_signal(info.si_signo, &info);
697 pc = (void*)(env->segs[R_CS].base + env->eip);
698 fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
702 process_pending_signals(env);
707 static void usage(void)
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"
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"
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"
730 /* XXX: currently only used for async signals (see signal.c) */
731 CPUState *global_env;
733 /* used to free thread contexts */
734 TaskState *first_task_state;
736 int main(int argc, char **argv)
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;
745 short use_gdbstub = 0;
747 const char *cpu_model;
761 if (!strcmp(r, "-")) {
763 } else if (!strcmp(r, "d")) {
764 if (optind >= argc) {
767 log_mask = argv[optind++];
768 } else if (!strcmp(r, "D")) {
769 if (optind >= argc) {
772 log_file = argv[optind++];
773 } else if (!strcmp(r, "s")) {
775 stack_size = strtol(r, (char **)&r, 0);
779 stack_size *= 1024 * 1024;
780 else if (*r == 'k' || *r == 'K')
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");
792 if (!strcmp(r, "g")) {
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);
803 } else if (!strcmp(r, "singlestep")) {
812 cpu_set_log_filename(log_file);
817 mask = cpu_str_to_log_mask(log_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);
828 if (optind >= argc) {
831 filename = argv[optind];
834 memset(regs, 0, sizeof(struct target_pt_regs));
836 if (cpu_model == NULL) {
837 #if defined(TARGET_I386)
839 cpu_model = "qemu64";
841 cpu_model = "qemu32";
843 #elif defined(TARGET_PPC)
850 #error unsupported CPU
855 /* NOTE: we need to init the CPU at this stage to get
856 qemu_host_page_size */
857 env = cpu_init(cpu_model);
860 printf("Starting %s with qemu\n----------------\n", filename);
864 if (mach_exec(filename, argv+optind, environ, regs) != 0) {
865 printf("Error loading %s\n", filename);
873 /* build Task State */
874 memset(ts, 0, sizeof(TaskState));
878 #if defined(TARGET_I386)
879 cpu_x86_set_cpl(env, 3);
881 env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
882 env->hflags |= HF_PE_MASK;
884 if (env->cpuid_features & CPUID_SSE) {
885 env->cr[4] |= CR4_OSFXSR_MASK;
886 env->hflags |= HF_OSFXSR_MASK;
889 /* flags setup : we activate the IRQs by default as in user mode */
890 env->eflags |= IF_MASK;
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;
903 /* Darwin LDT setup */
904 /* 2 - User code segment
905 3 - User data segment
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;
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));
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;
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);
933 syscallbackdoor[i++] = 0xcd;
934 syscallbackdoor[i++] = 0x90; /* int 0x90 */
935 syscallbackdoor[i++] = 0x0F;
936 syscallbackdoor[i++] = 0x35; /* sysexit */
938 /* Darwin sysenter/sysexit setup */
939 env->sysenter_cs = 0x1; //XXX
940 env->sysenter_eip = (int)syscallbackdoor;
941 env->sysenter_esp = (int)malloc(64);
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
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;
974 /* Syscalls are done via
975 int 0x80 (unix) (rarely used)
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 */
985 set_idt(0x90, 3); /* qemu-darwin-user's Unix syscalls backdoor */
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);
995 #elif defined(TARGET_PPC)
999 #if defined(TARGET_PPC64)
1000 #if defined(TARGET_ABI32)
1001 env->msr &= ~((target_ulong)1 << MSR_SF);
1003 env->msr |= (target_ulong)1 << MSR_SF;
1006 env->nip = regs->nip;
1007 for(i = 0; i < 32; i++) {
1008 env->gpr[i] = regs->gpr[i];
1012 #error unsupported target CPU
1016 printf("Waiting for gdb Connection on port 1234...\n");
1017 gdbserver_start (1234);
1018 gdb_handlesig(env, 0);