Kernel: Move GDT and IDT assembly to inline assembly
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Bananymous
parent
0bdb01ee04
commit
c8866aa88b
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@ -11,6 +11,23 @@ static GDTR s_gdtr;
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static SegmentDesriptor* s_gdt;
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extern "C" void load_gdt(void* gdt_ptr);
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asm(
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".global load_gdt;"
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"load_gdt:"
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"movl 4(%esp),%eax;"
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"lgdt (%eax);"
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"movw $0x10, %ax;"
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"movw %ax, %ds;"
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"movw %ax, %es;"
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"movw %ax, %fs;"
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"movw %ax, %gs;"
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"movw %ax, %ss;"
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"jmp $0x08,$flush;"
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"flush:"
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"ret;"
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);
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void write_gdt_entry_raw(uint8_t segment, uint32_t low, uint32_t high)
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{
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@ -1,16 +0,0 @@
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.global load_gdt
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load_gdt:
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movl 4(%esp),%eax
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lgdt (%eax)
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movw $0x10, %ax
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movw %ax, %ds
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movw %ax, %es
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movw %ax, %fs
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movw %ax, %gs
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movw %ax, %ss
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jmp $0x08,$flush
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flush:
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ret
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@ -49,52 +49,94 @@ static void (*s_irq_handlers[0xFF])() { nullptr };
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Kernel::panic(msg ", CR0={} CR2={} CR3={} CR4={}", cr0, cr2, cr3, cr4); \
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}
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INTERRUPT_HANDLER(0x00, "Divide error")
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INTERRUPT_HANDLER(0x01, "Debug exception")
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INTERRUPT_HANDLER(0x02, "Unknown error")
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INTERRUPT_HANDLER(0x00, "Division Error")
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INTERRUPT_HANDLER(0x01, "Debug")
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INTERRUPT_HANDLER(0x02, "Non-maskable Interrupt")
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INTERRUPT_HANDLER(0x03, "Breakpoint")
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INTERRUPT_HANDLER(0x04, "Overflow")
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INTERRUPT_HANDLER(0x05, "Bounds check")
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INTERRUPT_HANDLER(0x06, "Invalid opcode")
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INTERRUPT_HANDLER(0x07, "Coprocessor not available")
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INTERRUPT_HANDLER(0x08, "Double fault")
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INTERRUPT_HANDLER(0x09, "Coprocessor segment overrun")
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INTERRUPT_HANDLER(0x0a, "Invalid TSS")
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INTERRUPT_HANDLER(0x0b, "Segment not present")
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INTERRUPT_HANDLER(0x0c, "Stack exception")
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INTERRUPT_HANDLER(0x0d, "General protection fault")
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INTERRUPT_HANDLER(0x0e, "Page fault")
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INTERRUPT_HANDLER(0x0f, "Unknown error")
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INTERRUPT_HANDLER(0x10, "Coprocessor error")
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INTERRUPT_HANDLER(0x05, "Bound Range Exception")
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INTERRUPT_HANDLER(0x06, "Invalid Opcode")
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INTERRUPT_HANDLER(0x07, "Device Not Available")
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INTERRUPT_HANDLER(0x08, "Double Fault")
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INTERRUPT_HANDLER(0x09, "Coprocessor Segment Overrun")
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INTERRUPT_HANDLER(0x0A, "Invalid TSS")
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INTERRUPT_HANDLER(0x0B, "Segment Not Present")
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INTERRUPT_HANDLER(0x0C, "Stack-Segment Fault")
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INTERRUPT_HANDLER(0x0D, "Stack-Segment Fault")
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INTERRUPT_HANDLER(0x0E, "Page Fault")
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INTERRUPT_HANDLER(0x0F, "Unknown Exception 0x0F")
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INTERRUPT_HANDLER(0x10, "x87 Floating-Point Exception")
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INTERRUPT_HANDLER(0x11, "Alignment Check")
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INTERRUPT_HANDLER(0x12, "Machine Check")
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INTERRUPT_HANDLER(0x13, "SIMD Floating-Point Exception")
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INTERRUPT_HANDLER(0x14, "Virtualization Exception")
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INTERRUPT_HANDLER(0x15, "Control Protection Exception")
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INTERRUPT_HANDLER(0x16, "Unknown Exception 0x16")
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INTERRUPT_HANDLER(0x17, "Unknown Exception 0x17")
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INTERRUPT_HANDLER(0x18, "Unknown Exception 0x18")
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INTERRUPT_HANDLER(0x19, "Unknown Exception 0x19")
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INTERRUPT_HANDLER(0x1A, "Unknown Exception 0x1A")
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INTERRUPT_HANDLER(0x1B, "Unknown Exception 0x1B")
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INTERRUPT_HANDLER(0x1C, "Hypervisor Injection Exception")
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INTERRUPT_HANDLER(0x1D, "VMM Communication Exception")
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INTERRUPT_HANDLER(0x1E, "Security Exception")
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INTERRUPT_HANDLER(0x1F, "Unkown Exception 0x1F")
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#define REGISTER_HANDLER(i) register_interrupt_handler(i, interrupt ## i)
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void handle_irq()
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extern "C" void handle_irq()
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{
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uint16_t isr = PIC::get_isr();
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if (!isr) {
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//kprint("Spurious IRQ\n");
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return;
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}
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uint32_t isr[8];
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APIC::GetISR(isr);
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uint8_t irq = 0;
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for (uint8_t i = 0; i < 16; ++i) {
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if (i == 2)
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continue;
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if (isr & (1 << i)) {
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irq = i;
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break;
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}
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}
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uint8_t irq = 0;
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for (uint8_t i = 0; i < 8; i++)
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{
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for (uint8_t j = 0; j < 32; j++)
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{
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if (isr[i] & ((uint32_t)1 << j))
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{
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irq = 32 * i + j;
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goto found;
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}
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}
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}
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found:
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if (irq == 0)
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{
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dprintln("Spurious irq");
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return;
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}
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if (s_irq_handlers[irq])
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s_irq_handlers[irq]();
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else
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kprint("no handler for irq {}\n", irq);
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Kernel::panic("no handler for irq 0x{2H}\n", irq);
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PIC::eoi(irq);
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APIC::EOI();
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}
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extern "C" void handle_irq_common();
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asm(
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".globl handle_irq_common;"
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"handle_irq_common:"
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"pusha;"
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"pushw %ds;"
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"pushw %es;"
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"pushw %ss;"
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"pushw %ss;"
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"popw %ds;"
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"popw %es;"
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"call handle_irq;"
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"popw %es;"
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"popw %ds;"
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"popa;"
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"iret;"
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);
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namespace IDT
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{
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@ -1,15 +0,0 @@
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.globl handle_irq_common
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handle_irq_common:
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pusha
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pushw %ds
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pushw %es
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pushw %ss
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pushw %ss
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popw %ds
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popw %es
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call handle_irq
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popw %es
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popw %ds
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popa
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iret
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@ -8,9 +8,7 @@ $(ARCHDIR)/APIC.o \
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$(ARCHDIR)/boot.o \
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$(ARCHDIR)/CPUID.o \
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$(ARCHDIR)/font.o \
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$(ARCHDIR)/GDT_asm.o \
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$(ARCHDIR)/GDT.o \
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$(ARCHDIR)/IDT_asm.o \
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$(ARCHDIR)/IDT.o \
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$(ARCHDIR)/tty.o \
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$(ARCHDIR)/VESA.o \
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