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Merge branch 'main' of gitlab.ibr.cs.tu-bs.de:vss/teaching/ws25/v_bsb2/stubsmi

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This commit is contained in:
Eggert Jung
2026-02-06 23:09:43 +01:00
parent ce87f48f41 598f97cd78
commit 4418419c7b
31 changed files with 402 additions and 3388 deletions
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14
kernel/arch/idt.cc
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@@ -10,13 +10,9 @@ constinit struct InterruptDescriptor idt[256] = {};
// Struct used for loading (the address of) the Interrupt Descriptor Table into
// the IDT-Register
struct Register {
uint16_t limit; // Address of the last valid byte (relative to base)
struct InterruptDescriptor* base;
explicit Register(uint8_t max = 255) {
limit =
(max + static_cast<uint16_t>(1)) * sizeof(InterruptDescriptor) - 1;
base = idt;
}
uint16_t limit =
sizeof(idt) - 1; // Address of the last valid byte (relative to base)
struct InterruptDescriptor* base = idt;
} __attribute__((packed));
static_assert(sizeof(InterruptDescriptor) == 16,
@@ -26,11 +22,11 @@ static_assert(alignof(decltype(idt)) % 8 == 0, "IDT must be 8 byte aligned!");
void load() {
// Create structure required for writing to idtr and load via lidt
Register idtr(Core::Interrupt::VECTORS - 1);
Register idtr;
asm volatile("lidt %0\n\t" ::"m"(idtr));
}
void set(Core::Interrupt::Vector vector, InterruptDescriptor descriptor) {
idt[(uint8_t)vector] = descriptor;
idt[static_cast<uint8_t>(vector)] = descriptor;
}
} // namespace IDT