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arm_nce: skip data aborts for crash handling parity

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Liam 2023-11-21 23:23:48 -05:00 committed by t895
parent 20de0ddf1f
commit cf534f5149
1 changed files with 11 additions and 3 deletions
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14
src/core/arm/nce/arm_nce.cpp
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@ -116,10 +116,18 @@ bool ARM_NCE::HandleGuestFault(GuestContext* guest_ctx, void* raw_info, void* ra
return true;
}
// We can't handle the access, so trigger an exception.
// We can't handle the access, so determine why we crashed.
const bool is_prefetch_abort = host_ctx.pc == reinterpret_cast<u64>(info->si_addr);
guest_ctx->esr_el1.fetch_or(
static_cast<u64>(is_prefetch_abort ? HaltReason::PrefetchAbort : HaltReason::DataAbort));
// For data aborts, skip the instruction and return to guest code.
// This will allow games to continue in many scenarios where they would otherwise crash.
if (!is_prefetch_abort) {
host_ctx.pc += 4;
return true;
}
// This is a prefetch abort.
guest_ctx->esr_el1.fetch_or(static_cast<u64>(HaltReason::PrefetchAbort));
// Forcibly mark the context as locked. We are still running.
// We may race with SignalInterrupt here: