| 89 |
|
// Pointer to Kernel Data |
| 90 |
|
static KernelData * const kernel_data = (KernelData *)KERNEL_DATA_BASE; |
| 91 |
|
|
| 92 |
+ |
// SIGSEGV handler |
| 93 |
+ |
static sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t); |
| 94 |
+ |
|
| 95 |
|
|
| 96 |
|
/** |
| 97 |
|
* PowerPC emulator glue with special 'sheep' opcodes |
| 139 |
|
// FIXME: really make surre array allocation fail at link time? |
| 140 |
|
void *operator new[](size_t); |
| 141 |
|
void operator delete[](void *p); |
| 142 |
+ |
|
| 143 |
+ |
// Make sure the SIGSEGV handler can access CPU registers |
| 144 |
+ |
friend sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t); |
| 145 |
|
}; |
| 146 |
|
|
| 147 |
|
lazy_allocator< sheepshaver_cpu > allocator_helper< sheepshaver_cpu, lazy_allocator >::allocator; |
| 560 |
|
if ((addr - ROM_BASE) < ROM_SIZE) |
| 561 |
|
return SIGSEGV_RETURN_SKIP_INSTRUCTION; |
| 562 |
|
|
| 563 |
< |
// Ignore all other faults, if requested |
| 564 |
< |
if (PrefsFindBool("ignoresegv")) |
| 565 |
< |
return SIGSEGV_RETURN_FAILURE; |
| 563 |
> |
// Get program counter of target CPU |
| 564 |
> |
sheepshaver_cpu * const cpu = current_cpu; |
| 565 |
> |
const uint32 pc = cpu->pc(); |
| 566 |
> |
|
| 567 |
> |
// Fault in Mac ROM or RAM? |
| 568 |
> |
bool mac_fault = (pc >= ROM_BASE) && (pc < (ROM_BASE + ROM_AREA_SIZE)) || (pc >= RAMBase) && (pc < (RAMBase + RAMSize)); |
| 569 |
> |
if (mac_fault) { |
| 570 |
> |
|
| 571 |
> |
// "VM settings" during MacOS 8 installation |
| 572 |
> |
if (pc == ROM_BASE + 0x488160 && cpu->gpr(20) == 0xf8000000) |
| 573 |
> |
return SIGSEGV_RETURN_SKIP_INSTRUCTION; |
| 574 |
> |
|
| 575 |
> |
// MacOS 8.5 installation |
| 576 |
> |
else if (pc == ROM_BASE + 0x488140 && cpu->gpr(16) == 0xf8000000) |
| 577 |
> |
return SIGSEGV_RETURN_SKIP_INSTRUCTION; |
| 578 |
> |
|
| 579 |
> |
// MacOS 8 serial drivers on startup |
| 580 |
> |
else if (pc == ROM_BASE + 0x48e080 && (cpu->gpr(8) == 0xf3012002 || cpu->gpr(8) == 0xf3012000)) |
| 581 |
> |
return SIGSEGV_RETURN_SKIP_INSTRUCTION; |
| 582 |
> |
|
| 583 |
> |
// MacOS 8.1 serial drivers on startup |
| 584 |
> |
else if (pc == ROM_BASE + 0x48c5e0 && (cpu->gpr(20) == 0xf3012002 || cpu->gpr(20) == 0xf3012000)) |
| 585 |
> |
return SIGSEGV_RETURN_SKIP_INSTRUCTION; |
| 586 |
> |
else if (pc == ROM_BASE + 0x4a10a0 && (cpu->gpr(20) == 0xf3012002 || cpu->gpr(20) == 0xf3012000)) |
| 587 |
> |
return SIGSEGV_RETURN_SKIP_INSTRUCTION; |
| 588 |
> |
|
| 589 |
> |
// Ignore all other faults, if requested |
| 590 |
> |
if (PrefsFindBool("ignoresegv")) |
| 591 |
> |
return SIGSEGV_RETURN_SKIP_INSTRUCTION; |
| 592 |
> |
} |
| 593 |
|
#else |
| 594 |
|
#error "FIXME: You don't have the capability to skip instruction within signal handlers" |
| 595 |
|
#endif |
