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, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 #include <sys/syscall.h>
33 #define DEBUG_LOGFILE "/tmp/qemu.log"
36 #include <crt_externs.h>
37 # define environ (*_NSGetEnviron())
40 #include <mach/mach_init.h>
41 #include <mach/vm_map.h>
43 const char *interp_prefix = "";
45 asm(".zerofill __STD_PROG_ZONE, __STD_PROG_ZONE, __std_prog_zone, 0x0dfff000");
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;
52 void qerror(const char *fmt, ...)
57 vfprintf(stderr, fmt, ap);
59 fprintf(stderr, "\n");
63 void gemu_log(const char *fmt, ...)
68 vfprintf(stderr, fmt, ap);
72 void cpu_outb(CPUState *env, int addr, int val)
74 fprintf(stderr, "outb: port=0x%04x, data=%02x\n", addr, val);
77 void cpu_outw(CPUState *env, int addr, int val)
79 fprintf(stderr, "outw: port=0x%04x, data=%04x\n", addr, val);
82 void cpu_outl(CPUState *env, int addr, int val)
84 fprintf(stderr, "outl: port=0x%04x, data=%08x\n", addr, val);
87 int cpu_inb(CPUState *env, int addr)
89 fprintf(stderr, "inb: port=0x%04x\n", addr);
93 int cpu_inw(CPUState *env, int addr)
95 fprintf(stderr, "inw: port=0x%04x\n", addr);
99 int cpu_inl(CPUState *env, int addr)
101 fprintf(stderr, "inl: port=0x%04x\n", addr);
105 int cpu_get_pic_interrupt(CPUState *env)
111 static inline uint64_t cpu_ppc_get_tb (CPUState *env)
117 uint32_t cpu_ppc_load_tbl (CPUState *env)
119 return cpu_ppc_get_tb(env) & 0xFFFFFFFF;
122 uint32_t cpu_ppc_load_tbu (CPUState *env)
124 return cpu_ppc_get_tb(env) >> 32;
127 uint32_t cpu_ppc_load_atbl (CPUState *env)
129 return cpu_ppc_get_tb(env) & 0xFFFFFFFF;
132 uint32_t cpu_ppc_load_atbu (CPUState *env)
134 return cpu_ppc_get_tb(env) >> 32;
137 uint32_t cpu_ppc601_load_rtcu (CPUState *env)
139 cpu_ppc_load_tbu(env);
142 uint32_t cpu_ppc601_load_rtcl (CPUState *env)
144 return cpu_ppc_load_tbl(env) & 0x3FFFFF80;
147 /* XXX: to be fixed */
148 int ppc_dcr_read (ppc_dcr_t *dcr_env, int dcrn, target_ulong *valp)
153 int ppc_dcr_write (ppc_dcr_t *dcr_env, int dcrn, target_ulong val)
158 #define EXCP_DUMP(env, fmt, args...) \
160 fprintf(stderr, fmt , ##args); \
161 cpu_dump_state(env, stderr, fprintf, 0); \
162 if (loglevel != 0) { \
163 fprintf(logfile, fmt , ##args); \
164 cpu_dump_state(env, logfile, fprintf, 0); \
168 void cpu_loop(CPUPPCState *env)
172 target_siginfo_t info;
175 trapnr = cpu_ppc_exec(env);
177 case POWERPC_EXCP_NONE:
180 case POWERPC_EXCP_CRITICAL: /* Critical input */
181 cpu_abort(env, "Critical interrupt while in user mode. "
184 case POWERPC_EXCP_MCHECK: /* Machine check exception */
185 cpu_abort(env, "Machine check exception while in user mode. "
188 case POWERPC_EXCP_DSI: /* Data storage exception */
190 /* To deal with multiple qemu header version as host for the darwin-user code */
193 EXCP_DUMP(env, "Invalid data memory access: 0x" ADDRX "\n",
195 /* Handle this via the gdb */
196 gdb_handlesig (env, SIGSEGV);
198 info.si_addr = (void*)env->nip;
199 queue_signal(info.si_signo, &info);
201 case POWERPC_EXCP_ISI: /* Instruction storage exception */
202 EXCP_DUMP(env, "Invalid instruction fetch: 0x\n" ADDRX "\n",
204 /* Handle this via the gdb */
205 gdb_handlesig (env, SIGSEGV);
207 info.si_addr = (void*)(env->nip - 4);
208 queue_signal(info.si_signo, &info);
210 case POWERPC_EXCP_EXTERNAL: /* External input */
211 cpu_abort(env, "External interrupt while in user mode. "
214 case POWERPC_EXCP_ALIGN: /* Alignment exception */
215 EXCP_DUMP(env, "Unaligned memory access\n");
217 info.si_code = BUS_ADRALN;
218 info.si_addr = (void*)(env->nip - 4);
219 queue_signal(info.si_signo, &info);
221 case POWERPC_EXCP_PROGRAM: /* Program exception */
222 /* XXX: check this */
223 switch (env->error_code & ~0xF) {
224 case POWERPC_EXCP_FP:
225 EXCP_DUMP(env, "Floating point program exception\n");
227 info.si_signo = SIGFPE;
229 switch (env->error_code & 0xF) {
230 case POWERPC_EXCP_FP_OX:
231 info.si_code = FPE_FLTOVF;
233 case POWERPC_EXCP_FP_UX:
234 info.si_code = FPE_FLTUND;
236 case POWERPC_EXCP_FP_ZX:
237 case POWERPC_EXCP_FP_VXZDZ:
238 info.si_code = FPE_FLTDIV;
240 case POWERPC_EXCP_FP_XX:
241 info.si_code = FPE_FLTRES;
243 case POWERPC_EXCP_FP_VXSOFT:
244 info.si_code = FPE_FLTINV;
246 case POWERPC_EXCP_FP_VXSNAN:
247 case POWERPC_EXCP_FP_VXISI:
248 case POWERPC_EXCP_FP_VXIDI:
249 case POWERPC_EXCP_FP_VXIMZ:
250 case POWERPC_EXCP_FP_VXVC:
251 case POWERPC_EXCP_FP_VXSQRT:
252 case POWERPC_EXCP_FP_VXCVI:
253 info.si_code = FPE_FLTSUB;
256 EXCP_DUMP(env, "Unknown floating point exception (%02x)\n",
261 case POWERPC_EXCP_INVAL:
262 EXCP_DUMP(env, "Invalid instruction\n");
263 info.si_signo = SIGILL;
265 switch (env->error_code & 0xF) {
266 case POWERPC_EXCP_INVAL_INVAL:
267 info.si_code = ILL_ILLOPC;
269 case POWERPC_EXCP_INVAL_LSWX:
270 info.si_code = ILL_ILLOPN;
272 case POWERPC_EXCP_INVAL_SPR:
273 info.si_code = ILL_PRVREG;
275 case POWERPC_EXCP_INVAL_FP:
276 info.si_code = ILL_COPROC;
279 EXCP_DUMP(env, "Unknown invalid operation (%02x)\n",
280 env->error_code & 0xF);
281 info.si_code = ILL_ILLADR;
284 /* Handle this via the gdb */
285 gdb_handlesig (env, SIGSEGV);
287 case POWERPC_EXCP_PRIV:
288 EXCP_DUMP(env, "Privilege violation\n");
289 info.si_signo = SIGILL;
291 switch (env->error_code & 0xF) {
292 case POWERPC_EXCP_PRIV_OPC:
293 info.si_code = ILL_PRVOPC;
295 case POWERPC_EXCP_PRIV_REG:
296 info.si_code = ILL_PRVREG;
299 EXCP_DUMP(env, "Unknown privilege violation (%02x)\n",
300 env->error_code & 0xF);
301 info.si_code = ILL_PRVOPC;
305 case POWERPC_EXCP_TRAP:
306 cpu_abort(env, "Tried to call a TRAP\n");
309 /* Should not happen ! */
310 cpu_abort(env, "Unknown program exception (%02x)\n",
314 info.si_addr = (void*)(env->nip - 4);
315 queue_signal(info.si_signo, &info);
317 case POWERPC_EXCP_FPU: /* Floating-point unavailable exception */
318 EXCP_DUMP(env, "No floating point allowed\n");
319 info.si_signo = SIGILL;
321 info.si_code = ILL_COPROC;
322 info.si_addr = (void*)(env->nip - 4);
323 queue_signal(info.si_signo, &info);
325 case POWERPC_EXCP_SYSCALL: /* System call exception */
326 cpu_abort(env, "Syscall exception while in user mode. "
329 case POWERPC_EXCP_APU: /* Auxiliary processor unavailable */
330 EXCP_DUMP(env, "No APU instruction allowed\n");
331 info.si_signo = SIGILL;
333 info.si_code = ILL_COPROC;
334 info.si_addr = (void*)(env->nip - 4);
335 queue_signal(info.si_signo, &info);
337 case POWERPC_EXCP_DECR: /* Decrementer exception */
338 cpu_abort(env, "Decrementer interrupt while in user mode. "
341 case POWERPC_EXCP_FIT: /* Fixed-interval timer interrupt */
342 cpu_abort(env, "Fix interval timer interrupt while in user mode. "
345 case POWERPC_EXCP_WDT: /* Watchdog timer interrupt */
346 cpu_abort(env, "Watchdog timer interrupt while in user mode. "
349 case POWERPC_EXCP_DTLB: /* Data TLB error */
350 cpu_abort(env, "Data TLB exception while in user mode. "
353 case POWERPC_EXCP_ITLB: /* Instruction TLB error */
354 cpu_abort(env, "Instruction TLB exception while in user mode. "
357 case POWERPC_EXCP_DEBUG: /* Debug interrupt */
358 gdb_handlesig (env, SIGTRAP);
360 case POWERPC_EXCP_SPEU: /* SPE/embedded floating-point unavail. */
361 EXCP_DUMP(env, "No SPE/floating-point instruction allowed\n");
362 info.si_signo = SIGILL;
364 info.si_code = ILL_COPROC;
365 info.si_addr = (void*)(env->nip - 4);
366 queue_signal(info.si_signo, &info);
368 case POWERPC_EXCP_EFPDI: /* Embedded floating-point data IRQ */
369 cpu_abort(env, "Embedded floating-point data IRQ not handled\n");
371 case POWERPC_EXCP_EFPRI: /* Embedded floating-point round IRQ */
372 cpu_abort(env, "Embedded floating-point round IRQ not handled\n");
374 case POWERPC_EXCP_EPERFM: /* Embedded performance monitor IRQ */
375 cpu_abort(env, "Performance monitor exception not handled\n");
377 case POWERPC_EXCP_DOORI: /* Embedded doorbell interrupt */
378 cpu_abort(env, "Doorbell interrupt while in user mode. "
381 case POWERPC_EXCP_DOORCI: /* Embedded doorbell critical interrupt */
382 cpu_abort(env, "Doorbell critical interrupt while in user mode. "
385 case POWERPC_EXCP_RESET: /* System reset exception */
386 cpu_abort(env, "Reset interrupt while in user mode. "
389 case POWERPC_EXCP_DSEG: /* Data segment exception */
390 cpu_abort(env, "Data segment exception while in user mode. "
393 case POWERPC_EXCP_ISEG: /* Instruction segment exception */
394 cpu_abort(env, "Instruction segment exception "
395 "while in user mode. Aborting\n");
397 case POWERPC_EXCP_HDECR: /* Hypervisor decrementer exception */
398 cpu_abort(env, "Hypervisor decrementer interrupt "
399 "while in user mode. Aborting\n");
401 case POWERPC_EXCP_TRACE: /* Trace exception */
403 * we use this exception to emulate step-by-step execution mode.
406 case POWERPC_EXCP_HDSI: /* Hypervisor data storage exception */
407 cpu_abort(env, "Hypervisor data storage exception "
408 "while in user mode. Aborting\n");
410 case POWERPC_EXCP_HISI: /* Hypervisor instruction storage excp */
411 cpu_abort(env, "Hypervisor instruction storage exception "
412 "while in user mode. Aborting\n");
414 case POWERPC_EXCP_HDSEG: /* Hypervisor data segment exception */
415 cpu_abort(env, "Hypervisor data segment exception "
416 "while in user mode. Aborting\n");
418 case POWERPC_EXCP_HISEG: /* Hypervisor instruction segment excp */
419 cpu_abort(env, "Hypervisor instruction segment exception "
420 "while in user mode. Aborting\n");
422 case POWERPC_EXCP_VPU: /* Vector unavailable exception */
423 EXCP_DUMP(env, "No Altivec instructions allowed\n");
424 info.si_signo = SIGILL;
426 info.si_code = ILL_COPROC;
427 info.si_addr = (void*)(env->nip - 4);
428 queue_signal(info.si_signo, &info);
430 case POWERPC_EXCP_PIT: /* Programmable interval timer IRQ */
431 cpu_abort(env, "Programable interval timer interrupt "
432 "while in user mode. Aborting\n");
434 case POWERPC_EXCP_IO: /* IO error exception */
435 cpu_abort(env, "IO error exception while in user mode. "
438 case POWERPC_EXCP_RUNM: /* Run mode exception */
439 cpu_abort(env, "Run mode exception while in user mode. "
442 case POWERPC_EXCP_EMUL: /* Emulation trap exception */
443 cpu_abort(env, "Emulation trap exception not handled\n");
445 case POWERPC_EXCP_IFTLB: /* Instruction fetch TLB error */
446 cpu_abort(env, "Instruction fetch TLB exception "
447 "while in user-mode. Aborting");
449 case POWERPC_EXCP_DLTLB: /* Data load TLB miss */
450 cpu_abort(env, "Data load TLB exception while in user-mode. "
453 case POWERPC_EXCP_DSTLB: /* Data store TLB miss */
454 cpu_abort(env, "Data store TLB exception while in user-mode. "
457 case POWERPC_EXCP_FPA: /* Floating-point assist exception */
458 cpu_abort(env, "Floating-point assist exception not handled\n");
460 case POWERPC_EXCP_IABR: /* Instruction address breakpoint */
461 cpu_abort(env, "Instruction address breakpoint exception "
464 case POWERPC_EXCP_SMI: /* System management interrupt */
465 cpu_abort(env, "System management interrupt while in user mode. "
468 case POWERPC_EXCP_THERM: /* Thermal interrupt */
469 cpu_abort(env, "Thermal interrupt interrupt while in user mode. "
472 case POWERPC_EXCP_PERFM: /* Embedded performance monitor IRQ */
473 cpu_abort(env, "Performance monitor exception not handled\n");
475 case POWERPC_EXCP_VPUA: /* Vector assist exception */
476 cpu_abort(env, "Vector assist exception not handled\n");
478 case POWERPC_EXCP_SOFTP: /* Soft patch exception */
479 cpu_abort(env, "Soft patch exception not handled\n");
481 case POWERPC_EXCP_MAINT: /* Maintenance exception */
482 cpu_abort(env, "Maintenance exception while in user mode. "
485 case POWERPC_EXCP_STOP: /* stop translation */
486 /* We did invalidate the instruction cache. Go on */
488 case POWERPC_EXCP_BRANCH: /* branch instruction: */
489 /* We just stopped because of a branch. Go on */
491 case POWERPC_EXCP_SYSCALL_USER:
492 /* system call in user-mode emulation */
494 if(((int)env->gpr[0]) <= SYS_MAXSYSCALL && ((int)env->gpr[0])>0)
495 ret = do_unix_syscall(env, env->gpr[0]/*, env->gpr[3], env->gpr[4],
496 env->gpr[5], env->gpr[6], env->gpr[7],
497 env->gpr[8], env->gpr[9], env->gpr[10]*/);
498 else if(((int)env->gpr[0])<0)
499 ret = do_mach_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4],
500 env->gpr[5], env->gpr[6], env->gpr[7],
501 env->gpr[8], env->gpr[9], env->gpr[10]);
503 ret = do_thread_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4],
504 env->gpr[5], env->gpr[6], env->gpr[7],
505 env->gpr[8], env->gpr[9], env->gpr[10]);
507 /* Unix syscall error signaling */
508 if(((int)env->gpr[0]) <= SYS_MAXSYSCALL && ((int)env->gpr[0])>0)
520 /* just indicate that signals should be handled asap */
523 cpu_abort(env, "Unknown exception 0x%d. Aborting\n", trapnr);
526 process_pending_signals(env);
534 /***********************************************************/
535 /* CPUX86 core interface */
537 uint64_t cpu_get_tsc(CPUX86State *env)
539 return cpu_get_real_ticks();
543 write_dt(void *ptr, unsigned long addr, unsigned long limit,
547 e1 = (addr << 16) | (limit & 0xffff);
548 e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
550 stl((uint8_t *)ptr, e1);
551 stl((uint8_t *)ptr + 4, e2);
554 static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
555 unsigned long addr, unsigned int sel)
558 e1 = (addr & 0xffff) | (sel << 16);
559 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
560 stl((uint8_t *)ptr, e1);
561 stl((uint8_t *)ptr + 4, e2);
564 #define GDT_TABLE_SIZE 14
565 #define LDT_TABLE_SIZE 15
566 #define IDT_TABLE_SIZE 256
568 uint64_t gdt_table[GDT_TABLE_SIZE];
569 uint64_t ldt_table[LDT_TABLE_SIZE];
570 uint64_t idt_table[IDT_TABLE_SIZE];
571 uint32_t tss[TSS_SIZE];
573 /* only dpl matters as we do only user space emulation */
574 static void set_idt(int n, unsigned int dpl)
576 set_gate(idt_table + n, 0, dpl, 0, 0);
579 /* ABI convention: after a syscall if there was an error the CF flag is set */
580 static inline void set_error(CPUX86State *env, int ret)
583 env->eflags = env->eflags | 0x1;
586 env->regs[R_EAX] = ret;
589 void cpu_loop(CPUX86State *env)
594 target_siginfo_t info;
597 trapnr = cpu_x86_exec(env);
598 uint32_t *params = (uint32_t *)env->regs[R_ESP];
600 case 0x79: /* Our commpage hack back door exit is here */
601 do_commpage(env, env->eip, *(params + 1), *(params + 2),
602 *(params + 3), *(params + 4),
603 *(params + 5), *(params + 6),
604 *(params + 7), *(params + 8));
606 case 0x81: /* mach syscall */
608 ret = do_mach_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));
616 case 0x90: /* unix backdoor */
618 /* after sysenter, stack is in R_ECX, new eip in R_EDX (sysexit will flip them back)*/
619 int saved_stack = env->regs[R_ESP];
620 env->regs[R_ESP] = env->regs[R_ECX];
622 ret = do_unix_syscall(env, env->regs[R_EAX]);
624 env->regs[R_ECX] = env->regs[R_ESP];
625 env->regs[R_ESP] = saved_stack;
630 case 0x80: /* unix syscall */
632 ret = do_unix_syscall(env, env->regs[R_EAX]/*,
633 *(params + 1), *(params + 2),
634 *(params + 3), *(params + 4),
635 *(params + 5), *(params + 6),
636 *(params + 7), *(params + 8)*/);
640 case 0x82: /* thread syscall */
642 ret = do_thread_syscall(env, env->regs[R_EAX],
643 *(params + 1), *(params + 2),
644 *(params + 3), *(params + 4),
645 *(params + 5), *(params + 6),
646 *(params + 7), *(params + 8));
652 info.si_signo = SIGBUS;
654 info.si_code = BUS_NOOP;
656 gdb_handlesig (env, SIGBUS);
657 queue_signal(info.si_signo, &info);
660 info.si_signo = SIGSEGV;
662 info.si_code = SEGV_NOOP;
664 gdb_handlesig (env, SIGSEGV);
665 queue_signal(info.si_signo, &info);
668 info.si_signo = SIGSEGV;
670 if (!(env->error_code & 1))
671 info.si_code = SEGV_MAPERR;
673 info.si_code = SEGV_ACCERR;
674 info.si_addr = (void*)env->cr[2];
675 gdb_handlesig (env, SIGSEGV);
676 queue_signal(info.si_signo, &info);
679 /* division by zero */
680 info.si_signo = SIGFPE;
682 info.si_code = FPE_INTDIV;
683 info.si_addr = (void*)env->eip;
684 gdb_handlesig (env, SIGFPE);
685 queue_signal(info.si_signo, &info);
689 info.si_signo = SIGTRAP;
691 info.si_code = TRAP_BRKPT;
692 info.si_addr = (void*)env->eip;
693 gdb_handlesig (env, SIGTRAP);
694 queue_signal(info.si_signo, &info);
698 info.si_signo = SIGSEGV;
700 info.si_code = SEGV_NOOP;
702 gdb_handlesig (env, SIGSEGV);
703 queue_signal(info.si_signo, &info);
706 info.si_signo = SIGILL;
708 info.si_code = ILL_ILLOPN;
709 info.si_addr = (void*)env->eip;
710 gdb_handlesig (env, SIGILL);
711 queue_signal(info.si_signo, &info);
714 /* just indicate that signals should be handled asap */
720 sig = gdb_handlesig (env, SIGTRAP);
725 info.si_code = TRAP_BRKPT;
726 queue_signal(info.si_signo, &info);
731 pc = (void*)(env->segs[R_CS].base + env->eip);
732 fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
736 process_pending_signals(env);
743 printf("qemu-" TARGET_ARCH " version " QEMU_VERSION ", Copyright (c) 2003-2004 Fabrice Bellard\n"
744 "usage: qemu-" TARGET_ARCH " [-h] [-d opts] [-L path] [-s size] program [arguments...]\n"
745 "Darwin CPU emulator (compiled for %s emulation)\n"
747 "-h print this help\n"
748 "-L path set the %s library path (default='%s')\n"
749 "-s size set the stack size in bytes (default=%ld)\n"
752 "-d options activate log (logfile='%s')\n"
753 "-g wait for gdb on port 1234\n"
754 "-p pagesize set the host page size to 'pagesize'\n",
763 /* XXX: currently only used for async signals (see signal.c) */
764 CPUState *global_env;
765 /* used only if single thread */
766 CPUState *cpu_single_env = NULL;
768 /* used to free thread contexts */
769 TaskState *first_task_state;
771 int main(int argc, char **argv)
773 const char *filename;
774 struct target_pt_regs regs1, *regs = ®s1;
775 TaskState ts1, *ts = &ts1;
778 short use_gdbstub = 0;
780 const char *cpu_model;
786 cpu_set_log_filename(DEBUG_LOGFILE);
797 if (!strcmp(r, "-")) {
799 } else if (!strcmp(r, "d")) {
807 mask = cpu_str_to_log_mask(r);
809 printf("Log items (comma separated):\n");
810 for(item = cpu_log_items; item->mask != 0; item++) {
811 printf("%-10s %s\n", item->name, item->help);
816 } else if (!strcmp(r, "s")) {
818 stack_size = strtol(r, (char **)&r, 0);
822 stack_size *= 1024 * 1024;
823 else if (*r == 'k' || *r == 'K')
825 } else if (!strcmp(r, "L")) {
826 interp_prefix = argv[optind++];
827 } else if (!strcmp(r, "p")) {
828 qemu_host_page_size = atoi(argv[optind++]);
829 if (qemu_host_page_size == 0 ||
830 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
831 fprintf(stderr, "page size must be a power of two\n");
835 if (!strcmp(r, "g")) {
837 } else if (!strcmp(r, "cpu")) {
838 cpu_model = argv[optind++];
839 if (strcmp(cpu_model, "?") == 0) {
840 /* XXX: implement xxx_cpu_list for targets that still miss it */
841 #if defined(cpu_list)
842 cpu_list(stdout, &fprintf);
853 filename = argv[optind];
856 memset(regs, 0, sizeof(struct target_pt_regs));
858 if (cpu_model == NULL) {
859 #if defined(TARGET_I386)
861 cpu_model = "qemu64";
863 cpu_model = "qemu32";
865 #elif defined(TARGET_PPC)
872 #error unsupported CPU
876 /* NOTE: we need to init the CPU at this stage to get
877 qemu_host_page_size */
878 env = cpu_init(cpu_model);
880 printf("Starting %s with qemu\n----------------\n", filename);
884 if (mach_exec(filename, argv+optind, environ, regs) != 0) {
885 printf("Error loading %s\n", filename);
893 /* build Task State */
894 memset(ts, 0, sizeof(TaskState));
897 env->user_mode_only = 1;
899 #if defined(TARGET_I386)
900 cpu_x86_set_cpl(env, 3);
902 env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
903 env->hflags |= HF_PE_MASK;
905 if (env->cpuid_features & CPUID_SSE) {
906 env->cr[4] |= CR4_OSFXSR_MASK;
907 env->hflags |= HF_OSFXSR_MASK;
910 /* flags setup : we activate the IRQs by default as in user mode */
911 env->eflags |= IF_MASK;
913 /* darwin register setup */
914 env->regs[R_EAX] = regs->eax;
915 env->regs[R_EBX] = regs->ebx;
916 env->regs[R_ECX] = regs->ecx;
917 env->regs[R_EDX] = regs->edx;
918 env->regs[R_ESI] = regs->esi;
919 env->regs[R_EDI] = regs->edi;
920 env->regs[R_EBP] = regs->ebp;
921 env->regs[R_ESP] = regs->esp;
922 env->eip = regs->eip;
924 /* Darwin LDT setup */
925 /* 2 - User code segment
926 3 - User data segment
928 bzero(ldt_table, LDT_TABLE_SIZE * sizeof(ldt_table[0]));
929 env->ldt.base = (uint32_t) ldt_table;
930 env->ldt.limit = sizeof(ldt_table) - 1;
932 write_dt(ldt_table + 2, 0, 0xfffff,
933 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
934 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
935 write_dt(ldt_table + 3, 0, 0xfffff,
936 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
937 (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
938 write_dt(ldt_table + 4, 0, 0xfffff,
939 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
940 (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
943 * has changed a lot between old Darwin/x86 (pre-Mac Intel) and Mac OS X/x86,
944 now everything is done via int 0x81(mach) int 0x82 (thread) and sysenter/sysexit(unix) */
945 bzero(gdt_table, sizeof(gdt_table));
946 env->gdt.base = (uint32_t)gdt_table;
947 env->gdt.limit = sizeof(gdt_table) - 1;
949 /* Set up a back door to handle sysenter syscalls (unix) */
950 char * syscallbackdoor = malloc(64);
951 page_set_flags((int)syscallbackdoor, (int)syscallbackdoor + 64, PROT_EXEC | PROT_READ | PAGE_VALID);
954 syscallbackdoor[i++] = 0xcd;
955 syscallbackdoor[i++] = 0x90; /* int 0x90 */
956 syscallbackdoor[i++] = 0x0F;
957 syscallbackdoor[i++] = 0x35; /* sysexit */
959 /* Darwin sysenter/sysexit setup */
960 env->sysenter_cs = 0x1; //XXX
961 env->sysenter_eip = (int)syscallbackdoor;
962 env->sysenter_esp = (int)malloc(64);
965 This must match up with GDT[4] */
966 env->tr.base = (uint32_t) tss;
967 env->tr.limit = sizeof(tss) - 1;
968 env->tr.flags = DESC_P_MASK | (0x9 << DESC_TYPE_SHIFT);
969 stw(tss + 2, 0x10); // ss0 = 0x10 = GDT[2] = Kernel Data Segment
971 /* Darwin interrupt setup */
972 bzero(idt_table, sizeof(idt_table));
973 env->idt.base = (uint32_t) idt_table;
974 env->idt.limit = sizeof(idt_table) - 1;
995 /* Syscalls are done via
996 int 0x80 (unix) (rarely used)
999 int 0x83 (diag) (not handled here)
1000 sysenter/sysexit (unix) -> we redirect that to int 0x90 */
1001 set_idt(0x79, 3); /* Commpage hack, here is our backdoor interrupt */
1002 set_idt(0x80, 3); /* Unix Syscall */
1003 set_idt(0x81, 3); /* Mach Syscalls */
1004 set_idt(0x82, 3); /* thread Syscalls */
1006 set_idt(0x90, 3); /* qemu-darwin-user's Unix syscalls backdoor */
1009 cpu_x86_load_seg(env, R_CS, __USER_CS);
1010 cpu_x86_load_seg(env, R_DS, __USER_DS);
1011 cpu_x86_load_seg(env, R_ES, __USER_DS);
1012 cpu_x86_load_seg(env, R_SS, __USER_DS);
1013 cpu_x86_load_seg(env, R_FS, __USER_DS);
1014 cpu_x86_load_seg(env, R_GS, __USER_DS);
1016 #elif defined(TARGET_PPC)
1020 #if defined(TARGET_PPC64)
1021 #if defined(TARGET_ABI32)
1022 env->msr &= ~((target_ulong)1 << MSR_SF);
1024 env->msr |= (target_ulong)1 << MSR_SF;
1027 env->nip = regs->nip;
1028 for(i = 0; i < 32; i++) {
1029 env->gpr[i] = regs->gpr[i];
1033 #error unsupported target CPU
1037 printf("Waiting for gdb Connection on port 1234...\n");
1038 gdbserver_start (1234);
1039 gdb_handlesig(env, 0);