| 21 |
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#include "sysdeps.h" |
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#include "cpu_emulation.h" |
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#include "main.h" |
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+ |
#include "prefs.h" |
| 25 |
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#include "xlowmem.h" |
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#include "emul_op.h" |
| 27 |
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#include "rom_patches.h" |
| 537 |
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* Initialize CPU emulation |
| 538 |
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*/ |
| 539 |
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|
| 540 |
< |
static struct sigaction sigsegv_action; |
| 540 |
< |
|
| 541 |
< |
#if defined(__powerpc__) |
| 542 |
< |
#include <sys/ucontext.h> |
| 543 |
< |
#endif |
| 544 |
< |
|
| 545 |
< |
static void sigsegv_handler(int sig, siginfo_t *sip, void *scp) |
| 540 |
> |
static sigsegv_return_t sigsegv_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction) |
| 541 |
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{ |
| 547 |
– |
const uintptr addr = (uintptr)sip->si_addr; |
| 542 |
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#if ENABLE_VOSF |
| 543 |
< |
// Handle screen fault. |
| 544 |
< |
extern bool Screen_fault_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction); |
| 545 |
< |
if (Screen_fault_handler((sigsegv_address_t)addr, SIGSEGV_INVALID_PC)) |
| 546 |
< |
return; |
| 553 |
< |
#endif |
| 554 |
< |
#if defined(__powerpc__) |
| 555 |
< |
if (addr >= ROM_BASE && addr < ROM_BASE + ROM_SIZE) { |
| 556 |
< |
printf("IGNORE write access to ROM at %08x\n", addr); |
| 557 |
< |
(((ucontext_t *)scp)->uc_mcontext.regs)->nip += 4; |
| 558 |
< |
return; |
| 559 |
< |
} |
| 560 |
< |
if (addr >= 0xf3012000 && addr < 0xf3014000 && 0) { |
| 561 |
< |
printf("IGNORE write access to ROM at %08x\n", addr); |
| 562 |
< |
(((ucontext_t *)scp)->uc_mcontext.regs)->nip += 4; |
| 563 |
< |
return; |
| 564 |
< |
} |
| 543 |
> |
// Handle screen fault |
| 544 |
> |
extern bool Screen_fault_handler(sigsegv_address_t, sigsegv_address_t); |
| 545 |
> |
if (Screen_fault_handler(fault_address, fault_instruction)) |
| 546 |
> |
return SIGSEGV_RETURN_SUCCESS; |
| 547 |
|
#endif |
| 548 |
< |
printf("Caught SIGSEGV at address %p\n", sip->si_addr); |
| 549 |
< |
printf("Native PC: %08x\n", (((ucontext_t *)scp)->uc_mcontext.regs)->nip); |
| 550 |
< |
printf("Current CPU: %s\n", current_cpu == main_cpu ? "main" : "interrupts"); |
| 551 |
< |
#if 1 |
| 552 |
< |
dump_registers(); |
| 548 |
> |
|
| 549 |
> |
const uintptr addr = (uintptr)fault_address; |
| 550 |
> |
#if HAVE_SIGSEGV_SKIP_INSTRUCTION |
| 551 |
> |
// Ignore writes to ROM |
| 552 |
> |
if ((addr - ROM_BASE) < ROM_SIZE) |
| 553 |
> |
return SIGSEGV_RETURN_SKIP_INSTRUCTION; |
| 554 |
> |
|
| 555 |
> |
// Ignore all other faults, if requested |
| 556 |
> |
if (PrefsFindBool("ignoresegv")) |
| 557 |
> |
return SIGSEGV_RETURN_FAILURE; |
| 558 |
|
#else |
| 559 |
< |
printf("Main CPU context\n"); |
| 573 |
< |
main_cpu->dump_registers(); |
| 574 |
< |
printf("Interrupts CPU context\n"); |
| 575 |
< |
interrupt_cpu->dump_registers(); |
| 559 |
> |
#error "FIXME: You don't have the capability to skip instruction within signal handlers" |
| 560 |
|
#endif |
| 561 |
+ |
|
| 562 |
+ |
printf("SIGSEGV\n"); |
| 563 |
+ |
printf(" pc %p\n", fault_instruction); |
| 564 |
+ |
printf(" ea %p\n", fault_address); |
| 565 |
+ |
printf(" cpu %s\n", current_cpu == main_cpu ? "main" : "interrupts"); |
| 566 |
+ |
dump_registers(); |
| 567 |
|
current_cpu->dump_log(); |
| 568 |
|
enter_mon(); |
| 569 |
|
QuitEmulator(); |
| 570 |
+ |
|
| 571 |
+ |
return SIGSEGV_RETURN_FAILURE; |
| 572 |
|
} |
| 573 |
|
|
| 574 |
|
void init_emul_ppc(void) |
| 583 |
|
interrupt_cpu = new sheepshaver_cpu(); |
| 584 |
|
#endif |
| 585 |
|
|
| 586 |
< |
// Install SIGSEGV handler |
| 587 |
< |
sigemptyset(&sigsegv_action.sa_mask); |
| 588 |
< |
sigsegv_action.sa_sigaction = sigsegv_handler; |
| 597 |
< |
sigsegv_action.sa_flags = SA_SIGINFO; |
| 598 |
< |
sigsegv_action.sa_restorer = NULL; |
| 599 |
< |
sigaction(SIGSEGV, &sigsegv_action, NULL); |
| 600 |
< |
|
| 586 |
> |
// Install the handler for SIGSEGV |
| 587 |
> |
sigsegv_install_handler(sigsegv_handler); |
| 588 |
> |
|
| 589 |
|
#if ENABLE_MON |
| 590 |
|
// Install "regs" command in cxmon |
| 591 |
|
mon_add_command("regs", dump_registers, "regs Dump PowerPC registers\n"); |
