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Kernel: Tweak some suspicious casts in InterruptManagement

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This code needs a closer looking-into at some point. It doesn't seem
entirely safe to be casting u32's to pointers like it does.
This commit is contained in:
Andreas Kling 2020-05-23 13:43:34 +02:00
parent 7c278eb970
commit 8ec8304d74
Notes: sideshowbarker 2024-07-19 06:13:16 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/8ec8304d74c
1 changed files with 3 additions and 2 deletions
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5
Kernel/Interrupts/InterruptManagement.cpp
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@ -215,7 +215,8 @@ void InterruptManagement::locate_apic_data()
auto* ioapic_entry = (const ACPI::Structures::MADTEntries::IOAPIC*)madt_entry;
dbg() << "IOAPIC found @ MADT entry " << entry_index << ", MMIO Registers @ Px" << String::format("%x", ioapic_entry->ioapic_address);
m_interrupt_controllers.resize(1 + irq_controller_count);
m_interrupt_controllers[irq_controller_count] = adopt(*new IOAPIC(*(ioapic_mmio_regs*)ioapic_entry->ioapic_address, ioapic_entry->gsi_base));
// FIXME: Casting ioapic_entry->ioapic_address below looks suspicious!
m_interrupt_controllers[irq_controller_count] = adopt(*new IOAPIC(*(ioapic_mmio_regs*)(FlatPtr)ioapic_entry->ioapic_address, ioapic_entry->gsi_base));
irq_controller_count++;
}
if (madt_entry->type == (u8)ACPI::Structures::MADTEntryType::InterruptSourceOverride) {
@ -227,7 +228,7 @@ void InterruptManagement::locate_apic_data()
interrupt_override_entry->flags);
dbg() << "Interrupts: Overriding INT 0x" << String::format("%x", interrupt_override_entry->source) << " with GSI " << interrupt_override_entry->global_system_interrupt << ", for bus 0x" << String::format("%x", interrupt_override_entry->bus);
}
madt_entry = (ACPI::Structures::MADTEntryHeader*)(VirtualAddress((u32)madt_entry).offset(entry_length).get());
madt_entry = (ACPI::Structures::MADTEntryHeader*)(VirtualAddress(madt_entry).offset(entry_length).get());
entries_length -= entry_length;
entry_index++;
}