]>
git.proxmox.com Git - qemu.git/blob - cpu-exec.c
2 * i386 emulator main execution loop
4 * Copyright (c) 2003 Fabrice Bellard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #if !defined(CONFIG_SOFTMMU)
35 #include <sys/ucontext.h>
38 int tb_invalidated_flag
;
41 //#define DEBUG_SIGNAL
43 #if defined(TARGET_ARM) || defined(TARGET_SPARC)
44 /* XXX: unify with i386 target */
45 void cpu_loop_exit(void)
47 longjmp(env
->jmp_env
, 1);
51 /* exit the current TB from a signal handler. The host registers are
52 restored in a state compatible with the CPU emulator
54 void cpu_resume_from_signal(CPUState
*env1
, void *puc
)
56 #if !defined(CONFIG_SOFTMMU)
57 struct ucontext
*uc
= puc
;
62 /* XXX: restore cpu registers saved in host registers */
64 #if !defined(CONFIG_SOFTMMU)
66 /* XXX: use siglongjmp ? */
67 sigprocmask(SIG_SETMASK
, &uc
->uc_sigmask
, NULL
);
70 longjmp(env
->jmp_env
, 1);
73 /* main execution loop */
75 int cpu_exec(CPUState
*env1
)
77 int saved_T0
, saved_T1
, saved_T2
;
104 int saved_i7
, tmp_T0
;
106 int code_gen_size
, ret
, interrupt_request
;
107 void (*gen_func
)(void);
108 TranslationBlock
*tb
, **ptb
;
109 uint8_t *tc_ptr
, *cs_base
, *pc
;
112 /* first we save global registers */
119 /* we also save i7 because longjmp may not restore it */
120 asm volatile ("mov %%i7, %0" : "=r" (saved_i7
));
123 #if defined(TARGET_I386)
126 EAX
= env
->regs
[R_EAX
];
130 ECX
= env
->regs
[R_ECX
];
134 EDX
= env
->regs
[R_EDX
];
138 EBX
= env
->regs
[R_EBX
];
142 ESP
= env
->regs
[R_ESP
];
146 EBP
= env
->regs
[R_EBP
];
150 ESI
= env
->regs
[R_ESI
];
154 EDI
= env
->regs
[R_EDI
];
157 /* put eflags in CPU temporary format */
158 CC_SRC
= env
->eflags
& (CC_O
| CC_S
| CC_Z
| CC_A
| CC_P
| CC_C
);
159 DF
= 1 - (2 * ((env
->eflags
>> 10) & 1));
160 CC_OP
= CC_OP_EFLAGS
;
161 env
->eflags
&= ~(DF_MASK
| CC_O
| CC_S
| CC_Z
| CC_A
| CC_P
| CC_C
);
162 #elif defined(TARGET_ARM)
166 env
->CF
= (psr
>> 29) & 1;
167 env
->NZF
= (psr
& 0xc0000000) ^ 0x40000000;
168 env
->VF
= (psr
<< 3) & 0x80000000;
169 env
->cpsr
= psr
& ~0xf0000000;
171 #elif defined(TARGET_SPARC)
172 #elif defined(TARGET_PPC)
174 #error unsupported target CPU
176 env
->exception_index
= -1;
178 /* prepare setjmp context for exception handling */
180 if (setjmp(env
->jmp_env
) == 0) {
181 env
->current_tb
= NULL
;
182 /* if an exception is pending, we execute it here */
183 if (env
->exception_index
>= 0) {
184 if (env
->exception_index
>= EXCP_INTERRUPT
) {
185 /* exit request from the cpu execution loop */
186 ret
= env
->exception_index
;
188 } else if (env
->user_mode_only
) {
189 /* if user mode only, we simulate a fake exception
190 which will be hanlded outside the cpu execution
192 #if defined(TARGET_I386)
193 do_interrupt_user(env
->exception_index
,
194 env
->exception_is_int
,
196 env
->exception_next_eip
);
198 ret
= env
->exception_index
;
201 #if defined(TARGET_I386)
202 /* simulate a real cpu exception. On i386, it can
203 trigger new exceptions, but we do not handle
204 double or triple faults yet. */
205 do_interrupt(env
->exception_index
,
206 env
->exception_is_int
,
208 env
->exception_next_eip
, 0);
209 #elif defined(TARGET_PPC)
211 #elif defined(TARGET_SPARC)
212 do_interrupt(env
->exception_index
,
215 env
->exception_next_pc
, 0);
218 env
->exception_index
= -1;
220 T0
= 0; /* force lookup of first TB */
223 /* g1 can be modified by some libc? functions */
226 interrupt_request
= env
->interrupt_request
;
227 if (__builtin_expect(interrupt_request
, 0)) {
228 #if defined(TARGET_I386)
229 /* if hardware interrupt pending, we execute it */
230 if ((interrupt_request
& CPU_INTERRUPT_HARD
) &&
231 (env
->eflags
& IF_MASK
) &&
232 !(env
->hflags
& HF_INHIBIT_IRQ_MASK
)) {
234 env
->interrupt_request
&= ~CPU_INTERRUPT_HARD
;
235 intno
= cpu_get_pic_interrupt(env
);
236 if (loglevel
& CPU_LOG_TB_IN_ASM
) {
237 fprintf(logfile
, "Servicing hardware INT=0x%02x\n", intno
);
239 do_interrupt(intno
, 0, 0, 0, 1);
240 /* ensure that no TB jump will be modified as
241 the program flow was changed */
248 #elif defined(TARGET_PPC)
250 if ((interrupt_request
& CPU_INTERRUPT_RESET
)) {
255 if ((interrupt_request
& CPU_INTERRUPT_HARD
)) {
257 env
->exception_index
= EXCP_EXTERNAL
;
260 env
->interrupt_request
&= ~CPU_INTERRUPT_HARD
;
261 } else if ((interrupt_request
& CPU_INTERRUPT_TIMER
)) {
263 env
->exception_index
= EXCP_DECR
;
266 env
->interrupt_request
&= ~CPU_INTERRUPT_TIMER
;
269 #elif defined(TARGET_SPARC)
270 if (interrupt_request
& CPU_INTERRUPT_HARD
) {
271 do_interrupt(0, 0, 0, 0, 0);
272 env
->interrupt_request
&= ~CPU_INTERRUPT_HARD
;
273 } else if (interrupt_request
& CPU_INTERRUPT_TIMER
) {
274 //do_interrupt(0, 0, 0, 0, 0);
275 env
->interrupt_request
&= ~CPU_INTERRUPT_TIMER
;
278 if (interrupt_request
& CPU_INTERRUPT_EXITTB
) {
279 env
->interrupt_request
&= ~CPU_INTERRUPT_EXITTB
;
280 /* ensure that no TB jump will be modified as
281 the program flow was changed */
288 if (interrupt_request
& CPU_INTERRUPT_EXIT
) {
289 env
->interrupt_request
&= ~CPU_INTERRUPT_EXIT
;
290 env
->exception_index
= EXCP_INTERRUPT
;
295 if (loglevel
& CPU_LOG_EXEC
) {
296 #if defined(TARGET_I386)
297 /* restore flags in standard format */
298 env
->regs
[R_EAX
] = EAX
;
299 env
->regs
[R_EBX
] = EBX
;
300 env
->regs
[R_ECX
] = ECX
;
301 env
->regs
[R_EDX
] = EDX
;
302 env
->regs
[R_ESI
] = ESI
;
303 env
->regs
[R_EDI
] = EDI
;
304 env
->regs
[R_EBP
] = EBP
;
305 env
->regs
[R_ESP
] = ESP
;
306 env
->eflags
= env
->eflags
| cc_table
[CC_OP
].compute_all() | (DF
& DF_MASK
);
307 cpu_x86_dump_state(env
, logfile
, X86_DUMP_CCOP
);
308 env
->eflags
&= ~(DF_MASK
| CC_O
| CC_S
| CC_Z
| CC_A
| CC_P
| CC_C
);
309 #elif defined(TARGET_ARM)
310 env
->cpsr
= compute_cpsr();
311 cpu_arm_dump_state(env
, logfile
, 0);
312 env
->cpsr
&= ~0xf0000000;
313 #elif defined(TARGET_SPARC)
314 cpu_sparc_dump_state (env
, logfile
, 0);
315 #elif defined(TARGET_PPC)
316 cpu_ppc_dump_state(env
, logfile
, 0);
318 #error unsupported target CPU
322 /* we record a subset of the CPU state. It will
323 always be the same before a given translated block
325 #if defined(TARGET_I386)
327 flags
|= (env
->eflags
& (IOPL_MASK
| TF_MASK
| VM_MASK
));
328 cs_base
= env
->segs
[R_CS
].base
;
329 pc
= cs_base
+ env
->eip
;
330 #elif defined(TARGET_ARM)
333 pc
= (uint8_t *)env
->regs
[15];
334 #elif defined(TARGET_SPARC)
336 cs_base
= (uint8_t *)env
->npc
;
337 pc
= (uint8_t *) env
->pc
;
338 #elif defined(TARGET_PPC)
341 pc
= (uint8_t *)env
->nip
;
343 #error unsupported CPU
345 tb
= tb_find(&ptb
, (unsigned long)pc
, (unsigned long)cs_base
,
348 TranslationBlock
**ptb1
;
350 target_ulong phys_pc
, phys_page1
, phys_page2
, virt_page2
;
355 tb_invalidated_flag
= 0;
357 /* find translated block using physical mappings */
358 phys_pc
= get_phys_addr_code(env
, (unsigned long)pc
);
359 phys_page1
= phys_pc
& TARGET_PAGE_MASK
;
361 h
= tb_phys_hash_func(phys_pc
);
362 ptb1
= &tb_phys_hash
[h
];
367 if (tb
->pc
== (unsigned long)pc
&&
368 tb
->page_addr
[0] == phys_page1
&&
369 tb
->cs_base
== (unsigned long)cs_base
&&
370 tb
->flags
== flags
) {
371 /* check next page if needed */
372 if (tb
->page_addr
[1] != -1) {
373 virt_page2
= ((unsigned long)pc
& TARGET_PAGE_MASK
) +
375 phys_page2
= get_phys_addr_code(env
, virt_page2
);
376 if (tb
->page_addr
[1] == phys_page2
)
382 ptb1
= &tb
->phys_hash_next
;
385 /* if no translated code available, then translate it now */
386 tb
= tb_alloc((unsigned long)pc
);
388 /* flush must be done */
390 /* cannot fail at this point */
391 tb
= tb_alloc((unsigned long)pc
);
392 /* don't forget to invalidate previous TB info */
393 ptb
= &tb_hash
[tb_hash_func((unsigned long)pc
)];
396 tc_ptr
= code_gen_ptr
;
398 tb
->cs_base
= (unsigned long)cs_base
;
400 cpu_gen_code(env
, tb
, CODE_GEN_MAX_SIZE
, &code_gen_size
);
401 code_gen_ptr
= (void *)(((unsigned long)code_gen_ptr
+ code_gen_size
+ CODE_GEN_ALIGN
- 1) & ~(CODE_GEN_ALIGN
- 1));
403 /* check next page if needed */
404 virt_page2
= ((unsigned long)pc
+ tb
->size
- 1) & TARGET_PAGE_MASK
;
406 if (((unsigned long)pc
& TARGET_PAGE_MASK
) != virt_page2
) {
407 phys_page2
= get_phys_addr_code(env
, virt_page2
);
409 tb_link_phys(tb
, phys_pc
, phys_page2
);
412 if (tb_invalidated_flag
) {
413 /* as some TB could have been invalidated because
414 of memory exceptions while generating the code, we
415 must recompute the hash index here */
416 ptb
= &tb_hash
[tb_hash_func((unsigned long)pc
)];
418 ptb
= &(*ptb
)->hash_next
;
421 /* we add the TB in the virtual pc hash table */
423 tb
->hash_next
= NULL
;
425 spin_unlock(&tb_lock
);
428 if (loglevel
& CPU_LOG_EXEC
) {
429 fprintf(logfile
, "Trace 0x%08lx [0x%08lx] %s\n",
430 (long)tb
->tc_ptr
, (long)tb
->pc
,
431 lookup_symbol((void *)tb
->pc
));
437 /* see if we can patch the calling TB. */
439 #if defined(TARGET_I386) && defined(USE_CODE_COPY)
440 && (tb
->cflags
& CF_CODE_COPY
) ==
441 (((TranslationBlock
*)(T0
& ~3))->cflags
& CF_CODE_COPY
)
445 tb_add_jump((TranslationBlock
*)(T0
& ~3), T0
& 3, tb
);
446 #if defined(USE_CODE_COPY)
447 /* propagates the FP use info */
448 ((TranslationBlock
*)(T0
& ~3))->cflags
|=
449 (tb
->cflags
& CF_FP_USED
);
451 spin_unlock(&tb_lock
);
454 env
->current_tb
= tb
;
455 /* execute the generated code */
456 gen_func
= (void *)tc_ptr
;
457 #if defined(__sparc__)
458 __asm__
__volatile__("call %0\n\t"
462 : "i0", "i1", "i2", "i3", "i4", "i5");
463 #elif defined(__arm__)
464 asm volatile ("mov pc, %0\n\t"
465 ".global exec_loop\n\t"
469 : "r1", "r2", "r3", "r8", "r9", "r10", "r12", "r14");
470 #elif defined(TARGET_I386) && defined(USE_CODE_COPY)
472 if (!(tb
->cflags
& CF_CODE_COPY
)) {
473 if ((tb
->cflags
& CF_FP_USED
) && env
->native_fp_regs
) {
474 save_native_fp_state(env
);
478 if ((tb
->cflags
& CF_FP_USED
) && !env
->native_fp_regs
) {
479 restore_native_fp_state(env
);
481 /* we work with native eflags */
482 CC_SRC
= cc_table
[CC_OP
].compute_all();
483 CC_OP
= CC_OP_EFLAGS
;
484 asm(".globl exec_loop\n"
489 " fs movl %11, %%eax\n"
490 " andl $0x400, %%eax\n"
491 " fs orl %8, %%eax\n"
494 " fs movl %%esp, %12\n"
495 " fs movl %0, %%eax\n"
496 " fs movl %1, %%ecx\n"
497 " fs movl %2, %%edx\n"
498 " fs movl %3, %%ebx\n"
499 " fs movl %4, %%esp\n"
500 " fs movl %5, %%ebp\n"
501 " fs movl %6, %%esi\n"
502 " fs movl %7, %%edi\n"
505 " fs movl %%esp, %4\n"
506 " fs movl %12, %%esp\n"
507 " fs movl %%eax, %0\n"
508 " fs movl %%ecx, %1\n"
509 " fs movl %%edx, %2\n"
510 " fs movl %%ebx, %3\n"
511 " fs movl %%ebp, %5\n"
512 " fs movl %%esi, %6\n"
513 " fs movl %%edi, %7\n"
516 " movl %%eax, %%ecx\n"
517 " andl $0x400, %%ecx\n"
519 " andl $0x8d5, %%eax\n"
520 " fs movl %%eax, %8\n"
522 " subl %%ecx, %%eax\n"
523 " fs movl %%eax, %11\n"
524 " fs movl %9, %%ebx\n" /* get T0 value */
527 : "m" (*(uint8_t *)offsetof(CPUState
, regs
[0])),
528 "m" (*(uint8_t *)offsetof(CPUState
, regs
[1])),
529 "m" (*(uint8_t *)offsetof(CPUState
, regs
[2])),
530 "m" (*(uint8_t *)offsetof(CPUState
, regs
[3])),
531 "m" (*(uint8_t *)offsetof(CPUState
, regs
[4])),
532 "m" (*(uint8_t *)offsetof(CPUState
, regs
[5])),
533 "m" (*(uint8_t *)offsetof(CPUState
, regs
[6])),
534 "m" (*(uint8_t *)offsetof(CPUState
, regs
[7])),
535 "m" (*(uint8_t *)offsetof(CPUState
, cc_src
)),
536 "m" (*(uint8_t *)offsetof(CPUState
, tmp0
)),
538 "m" (*(uint8_t *)offsetof(CPUState
, df
)),
539 "m" (*(uint8_t *)offsetof(CPUState
, saved_esp
))
547 env
->current_tb
= NULL
;
548 /* reset soft MMU for next block (it can currently
549 only be set by a memory fault) */
550 #if defined(TARGET_I386) && !defined(CONFIG_SOFTMMU)
551 if (env
->hflags
& HF_SOFTMMU_MASK
) {
552 env
->hflags
&= ~HF_SOFTMMU_MASK
;
553 /* do not allow linking to another block */
563 #if defined(TARGET_I386)
564 #if defined(USE_CODE_COPY)
565 if (env
->native_fp_regs
) {
566 save_native_fp_state(env
);
569 /* restore flags in standard format */
570 env
->eflags
= env
->eflags
| cc_table
[CC_OP
].compute_all() | (DF
& DF_MASK
);
572 /* restore global registers */
597 #elif defined(TARGET_ARM)
598 env
->cpsr
= compute_cpsr();
599 #elif defined(TARGET_SPARC)
600 #elif defined(TARGET_PPC)
602 #error unsupported target CPU
605 asm volatile ("mov %0, %%i7" : : "r" (saved_i7
));
614 /* must only be called from the generated code as an exception can be
616 void tb_invalidate_page_range(target_ulong start
, target_ulong end
)
618 /* XXX: cannot enable it yet because it yields to MMU exception
619 where NIP != read address on PowerPC */
621 target_ulong phys_addr
;
622 phys_addr
= get_phys_addr_code(env
, start
);
623 tb_invalidate_phys_page_range(phys_addr
, phys_addr
+ end
- start
, 0);
627 #if defined(TARGET_I386) && defined(CONFIG_USER_ONLY)
629 void cpu_x86_load_seg(CPUX86State
*s
, int seg_reg
, int selector
)
631 CPUX86State
*saved_env
;
635 if (!(env
->cr
[0] & CR0_PE_MASK
) || (env
->eflags
& VM_MASK
)) {
637 cpu_x86_load_seg_cache(env
, seg_reg
, selector
,
638 (uint8_t *)(selector
<< 4), 0xffff, 0);
640 load_seg(seg_reg
, selector
);
645 void cpu_x86_fsave(CPUX86State
*s
, uint8_t *ptr
, int data32
)
647 CPUX86State
*saved_env
;
652 helper_fsave(ptr
, data32
);
657 void cpu_x86_frstor(CPUX86State
*s
, uint8_t *ptr
, int data32
)
659 CPUX86State
*saved_env
;
664 helper_frstor(ptr
, data32
);
669 #endif /* TARGET_I386 */
671 #if !defined(CONFIG_SOFTMMU)
673 #if defined(TARGET_I386)
675 /* 'pc' is the host PC at which the exception was raised. 'address' is
676 the effective address of the memory exception. 'is_write' is 1 if a
677 write caused the exception and otherwise 0'. 'old_set' is the
678 signal set which should be restored */
679 static inline int handle_cpu_signal(unsigned long pc
, unsigned long address
,
680 int is_write
, sigset_t
*old_set
,
683 TranslationBlock
*tb
;
687 env
= cpu_single_env
; /* XXX: find a correct solution for multithread */
688 #if defined(DEBUG_SIGNAL)
689 qemu_printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
690 pc
, address
, is_write
, *(unsigned long *)old_set
);
692 /* XXX: locking issue */
693 if (is_write
&& page_unprotect(address
, pc
, puc
)) {
697 /* see if it is an MMU fault */
698 ret
= cpu_x86_handle_mmu_fault(env
, address
, is_write
,
699 ((env
->hflags
& HF_CPL_MASK
) == 3), 0);
701 return 0; /* not an MMU fault */
703 return 1; /* the MMU fault was handled without causing real CPU fault */
704 /* now we have a real cpu fault */
707 /* the PC is inside the translated code. It means that we have
708 a virtual CPU fault */
709 cpu_restore_state(tb
, env
, pc
, puc
);
713 printf("PF exception: EIP=0x%08x CR2=0x%08x error=0x%x\n",
714 env
->eip
, env
->cr
[2], env
->error_code
);
716 /* we restore the process signal mask as the sigreturn should
717 do it (XXX: use sigsetjmp) */
718 sigprocmask(SIG_SETMASK
, old_set
, NULL
);
719 raise_exception_err(EXCP0E_PAGE
, env
->error_code
);
721 /* activate soft MMU for this block */
722 env
->hflags
|= HF_SOFTMMU_MASK
;
723 cpu_resume_from_signal(env
, puc
);
725 /* never comes here */
729 #elif defined(TARGET_ARM)
730 static inline int handle_cpu_signal(unsigned long pc
, unsigned long address
,
731 int is_write
, sigset_t
*old_set
,
737 #elif defined(TARGET_SPARC)
738 static inline int handle_cpu_signal(unsigned long pc
, unsigned long address
,
739 int is_write
, sigset_t
*old_set
,
742 /* XXX: locking issue */
743 if (is_write
&& page_unprotect(address
, pc
, puc
)) {
748 #elif defined (TARGET_PPC)
749 static inline int handle_cpu_signal(unsigned long pc
, unsigned long address
,
750 int is_write
, sigset_t
*old_set
,
753 TranslationBlock
*tb
;
758 env
= cpu_single_env
; /* XXX: find a correct solution for multithread */
760 #if defined(DEBUG_SIGNAL)
761 printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
762 pc
, address
, is_write
, *(unsigned long *)old_set
);
764 /* XXX: locking issue */
765 if (is_write
&& page_unprotect(address
, pc
, puc
)) {
769 /* see if it is an MMU fault */
770 ret
= cpu_ppc_handle_mmu_fault(env
, address
, is_write
, msr_pr
, 0);
772 return 0; /* not an MMU fault */
774 return 1; /* the MMU fault was handled without causing real CPU fault */
776 /* now we have a real cpu fault */
779 /* the PC is inside the translated code. It means that we have
780 a virtual CPU fault */
781 cpu_restore_state(tb
, env
, pc
, puc
);
785 printf("PF exception: NIP=0x%08x error=0x%x %p\n",
786 env
->nip
, env
->error_code
, tb
);
788 /* we restore the process signal mask as the sigreturn should
789 do it (XXX: use sigsetjmp) */
790 sigprocmask(SIG_SETMASK
, old_set
, NULL
);
791 do_raise_exception_err(env
->exception_index
, env
->error_code
);
793 /* activate soft MMU for this block */
794 cpu_resume_from_signal(env
, puc
);
796 /* never comes here */
800 #error unsupported target CPU
803 #if defined(__i386__)
805 #if defined(USE_CODE_COPY)
806 static void cpu_send_trap(unsigned long pc
, int trap
,
809 TranslationBlock
*tb
;
812 env
= cpu_single_env
; /* XXX: find a correct solution for multithread */
813 /* now we have a real cpu fault */
816 /* the PC is inside the translated code. It means that we have
817 a virtual CPU fault */
818 cpu_restore_state(tb
, env
, pc
, uc
);
820 sigprocmask(SIG_SETMASK
, &uc
->uc_sigmask
, NULL
);
821 raise_exception_err(trap
, env
->error_code
);
825 int cpu_signal_handler(int host_signum
, struct siginfo
*info
,
828 struct ucontext
*uc
= puc
;
836 #define REG_TRAPNO TRAPNO
838 pc
= uc
->uc_mcontext
.gregs
[REG_EIP
];
839 trapno
= uc
->uc_mcontext
.gregs
[REG_TRAPNO
];
840 #if defined(TARGET_I386) && defined(USE_CODE_COPY)
841 if (trapno
== 0x00 || trapno
== 0x05) {
842 /* send division by zero or bound exception */
843 cpu_send_trap(pc
, trapno
, uc
);
847 return handle_cpu_signal(pc
, (unsigned long)info
->si_addr
,
849 (uc
->uc_mcontext
.gregs
[REG_ERR
] >> 1) & 1 : 0,
850 &uc
->uc_sigmask
, puc
);
853 #elif defined(__x86_64__)
855 int cpu_signal_handler(int host_signum
, struct siginfo
*info
,
858 struct ucontext
*uc
= puc
;
861 pc
= uc
->uc_mcontext
.gregs
[REG_RIP
];
862 return handle_cpu_signal(pc
, (unsigned long)info
->si_addr
,
863 uc
->uc_mcontext
.gregs
[REG_TRAPNO
] == 0xe ?
864 (uc
->uc_mcontext
.gregs
[REG_ERR
] >> 1) & 1 : 0,
865 &uc
->uc_sigmask
, puc
);
868 #elif defined(__powerpc__)
870 /***********************************************************************
871 * signal context platform-specific definitions
875 /* All Registers access - only for local access */
876 # define REG_sig(reg_name, context) ((context)->uc_mcontext.regs->reg_name)
877 /* Gpr Registers access */
878 # define GPR_sig(reg_num, context) REG_sig(gpr[reg_num], context)
879 # define IAR_sig(context) REG_sig(nip, context) /* Program counter */
880 # define MSR_sig(context) REG_sig(msr, context) /* Machine State Register (Supervisor) */
881 # define CTR_sig(context) REG_sig(ctr, context) /* Count register */
882 # define XER_sig(context) REG_sig(xer, context) /* User's integer exception register */
883 # define LR_sig(context) REG_sig(link, context) /* Link register */
884 # define CR_sig(context) REG_sig(ccr, context) /* Condition register */
885 /* Float Registers access */
886 # define FLOAT_sig(reg_num, context) (((double*)((char*)((context)->uc_mcontext.regs+48*4)))[reg_num])
887 # define FPSCR_sig(context) (*(int*)((char*)((context)->uc_mcontext.regs+(48+32*2)*4)))
888 /* Exception Registers access */
889 # define DAR_sig(context) REG_sig(dar, context)
890 # define DSISR_sig(context) REG_sig(dsisr, context)
891 # define TRAP_sig(context) REG_sig(trap, context)
895 # include <sys/ucontext.h>
896 typedef struct ucontext SIGCONTEXT
;
897 /* All Registers access - only for local access */
898 # define REG_sig(reg_name, context) ((context)->uc_mcontext->ss.reg_name)
899 # define FLOATREG_sig(reg_name, context) ((context)->uc_mcontext->fs.reg_name)
900 # define EXCEPREG_sig(reg_name, context) ((context)->uc_mcontext->es.reg_name)
901 # define VECREG_sig(reg_name, context) ((context)->uc_mcontext->vs.reg_name)
902 /* Gpr Registers access */
903 # define GPR_sig(reg_num, context) REG_sig(r##reg_num, context)
904 # define IAR_sig(context) REG_sig(srr0, context) /* Program counter */
905 # define MSR_sig(context) REG_sig(srr1, context) /* Machine State Register (Supervisor) */
906 # define CTR_sig(context) REG_sig(ctr, context)
907 # define XER_sig(context) REG_sig(xer, context) /* Link register */
908 # define LR_sig(context) REG_sig(lr, context) /* User's integer exception register */
909 # define CR_sig(context) REG_sig(cr, context) /* Condition register */
910 /* Float Registers access */
911 # define FLOAT_sig(reg_num, context) FLOATREG_sig(fpregs[reg_num], context)
912 # define FPSCR_sig(context) ((double)FLOATREG_sig(fpscr, context))
913 /* Exception Registers access */
914 # define DAR_sig(context) EXCEPREG_sig(dar, context) /* Fault registers for coredump */
915 # define DSISR_sig(context) EXCEPREG_sig(dsisr, context)
916 # define TRAP_sig(context) EXCEPREG_sig(exception, context) /* number of powerpc exception taken */
917 #endif /* __APPLE__ */
919 int cpu_signal_handler(int host_signum
, struct siginfo
*info
,
922 struct ucontext
*uc
= puc
;
930 if (DSISR_sig(uc
) & 0x00800000)
933 if (TRAP_sig(uc
) != 0x400 && (DSISR_sig(uc
) & 0x02000000))
936 return handle_cpu_signal(pc
, (unsigned long)info
->si_addr
,
937 is_write
, &uc
->uc_sigmask
, puc
);
940 #elif defined(__alpha__)
942 int cpu_signal_handler(int host_signum
, struct siginfo
*info
,
945 struct ucontext
*uc
= puc
;
946 uint32_t *pc
= uc
->uc_mcontext
.sc_pc
;
950 /* XXX: need kernel patch to get write flag faster */
951 switch (insn
>> 26) {
966 return handle_cpu_signal(pc
, (unsigned long)info
->si_addr
,
967 is_write
, &uc
->uc_sigmask
, puc
);
969 #elif defined(__sparc__)
971 int cpu_signal_handler(int host_signum
, struct siginfo
*info
,
974 uint32_t *regs
= (uint32_t *)(info
+ 1);
975 void *sigmask
= (regs
+ 20);
980 /* XXX: is there a standard glibc define ? */
982 /* XXX: need kernel patch to get write flag faster */
984 insn
= *(uint32_t *)pc
;
985 if ((insn
>> 30) == 3) {
986 switch((insn
>> 19) & 0x3f) {
998 return handle_cpu_signal(pc
, (unsigned long)info
->si_addr
,
999 is_write
, sigmask
, NULL
);
1002 #elif defined(__arm__)
1004 int cpu_signal_handler(int host_signum
, struct siginfo
*info
,
1007 struct ucontext
*uc
= puc
;
1011 pc
= uc
->uc_mcontext
.gregs
[R15
];
1012 /* XXX: compute is_write */
1014 return handle_cpu_signal(pc
, (unsigned long)info
->si_addr
,
1019 #elif defined(__mc68000)
1021 int cpu_signal_handler(int host_signum
, struct siginfo
*info
,
1024 struct ucontext
*uc
= puc
;
1028 pc
= uc
->uc_mcontext
.gregs
[16];
1029 /* XXX: compute is_write */
1031 return handle_cpu_signal(pc
, (unsigned long)info
->si_addr
,
1033 &uc
->uc_sigmask
, puc
);
1038 #error host CPU specific signal handler needed
1042 #endif /* !defined(CONFIG_SOFTMMU) */