156 lines
3.8 KiB
C
156 lines
3.8 KiB
C
/* vim: tabstop=4 shiftwidth=4 noexpandtab
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*
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* Interrupt Services Requests
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*/
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#include <system.h>
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#include <logging.h>
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/*
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* Exception Handlers
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*/
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extern void _isr0();
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extern void _isr1();
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extern void _isr2();
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extern void _isr3();
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extern void _isr4();
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extern void _isr5();
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extern void _isr6();
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extern void _isr7();
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extern void _isr8();
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extern void _isr9();
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extern void _isr10();
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extern void _isr11();
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extern void _isr12();
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extern void _isr13();
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extern void _isr14();
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extern void _isr15();
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extern void _isr16();
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extern void _isr17();
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extern void _isr18();
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extern void _isr19();
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extern void _isr20();
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extern void _isr21();
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extern void _isr22();
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extern void _isr23();
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extern void _isr24();
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extern void _isr25();
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extern void _isr26();
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extern void _isr27();
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extern void _isr28();
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extern void _isr29();
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extern void _isr30();
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extern void _isr31();
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extern void _isr127();
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static irq_handler_t isrs_routines[32] = { NULL };
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void
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isrs_install_handler(
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int isrs,
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irq_handler_t handler
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) {
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isrs_routines[isrs] = handler;
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}
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void
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isrs_uninstall_handler(
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int isrs
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) {
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isrs_routines[isrs] = 0;
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}
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void
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isrs_install() {
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blog("Setting up Interrupt Service Routines...");
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/* Exception Handlers */
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idt_set_gate(0, (unsigned)_isr0, 0x08, 0x8E);
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idt_set_gate(1, (unsigned)_isr1, 0x08, 0x8E);
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idt_set_gate(2, (unsigned)_isr2, 0x08, 0x8E);
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idt_set_gate(3, (unsigned)_isr3, 0x08, 0x8E);
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idt_set_gate(4, (unsigned)_isr4, 0x08, 0x8E);
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idt_set_gate(5, (unsigned)_isr5, 0x08, 0x8E);
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idt_set_gate(6, (unsigned)_isr6, 0x08, 0x8E);
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idt_set_gate(7, (unsigned)_isr7, 0x08, 0x8E);
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idt_set_gate(8, (unsigned)_isr8, 0x08, 0x8E);
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idt_set_gate(9, (unsigned)_isr9, 0x08, 0x8E);
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idt_set_gate(10, (unsigned)_isr10, 0x08, 0x8E);
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idt_set_gate(11, (unsigned)_isr11, 0x08, 0x8E);
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idt_set_gate(12, (unsigned)_isr12, 0x08, 0x8E);
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idt_set_gate(13, (unsigned)_isr13, 0x08, 0x8E);
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idt_set_gate(14, (unsigned)_isr14, 0x08, 0x8E);
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idt_set_gate(15, (unsigned)_isr15, 0x08, 0x8E);
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idt_set_gate(16, (unsigned)_isr16, 0x08, 0x8E);
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idt_set_gate(17, (unsigned)_isr17, 0x08, 0x8E);
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idt_set_gate(18, (unsigned)_isr18, 0x08, 0x8E);
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idt_set_gate(19, (unsigned)_isr19, 0x08, 0x8E);
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idt_set_gate(20, (unsigned)_isr20, 0x08, 0x8E);
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idt_set_gate(21, (unsigned)_isr21, 0x08, 0x8E);
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idt_set_gate(22, (unsigned)_isr22, 0x08, 0x8E);
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idt_set_gate(23, (unsigned)_isr23, 0x08, 0x8E);
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idt_set_gate(24, (unsigned)_isr24, 0x08, 0x8E);
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idt_set_gate(25, (unsigned)_isr25, 0x08, 0x8E);
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idt_set_gate(26, (unsigned)_isr26, 0x08, 0x8E);
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idt_set_gate(27, (unsigned)_isr27, 0x08, 0x8E);
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idt_set_gate(28, (unsigned)_isr28, 0x08, 0x8E);
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idt_set_gate(29, (unsigned)_isr29, 0x08, 0x8E);
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idt_set_gate(30, (unsigned)_isr30, 0x08, 0x8E);
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idt_set_gate(31, (unsigned)_isr31, 0x08, 0x8E);
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idt_set_gate(SYSCALL_VECTOR, (unsigned)_isr127, 0x08, 0x8E);
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bfinish(0);
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}
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char *exception_messages[] = {
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"Division by zero", /* 0 */
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"Debug",
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"Non-maskable interrupt",
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"Breakpoint",
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"Detected overflow",
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"Out-of-bounds", /* 5 */
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"Invalid opcode",
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"No coprocessor",
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"Double fault",
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"Coprocessor segment overrun",
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"Bad TSS", /* 10 */
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"Segment not present",
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"Stack fault",
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"General protection fault",
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"Page fault",
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"Unknown interrupt", /* 15 */
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"Coprocessor fault",
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"Alignment check",
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"Machine check",
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"Reserved",
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"Reserved",
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"Reserved",
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"Reserved",
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"Reserved",
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"Reserved",
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"Reserved",
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"Reserved",
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"Reserved",
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"Reserved",
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"Reserved",
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"Reserved",
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"Reserved"
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};
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void fault_handler(struct regs *r) {
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if (r->int_no == 8) {
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STOP;
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}
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if (r->int_no >= 32 && r->int_no != SYSCALL_VECTOR) {
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STOP;
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}
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IRQ_OFF;
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void (*handler)(struct regs *r);
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handler = isrs_routines[r->int_no];
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if (handler) {
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handler(r);
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} else {
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kprintf("Unhandled exception: [%d] %s\n", r->int_no, exception_messages[r->int_no]);
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HALT_AND_CATCH_FIRE("Process caused an unhandled exception", r);
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}
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IRQ_RES;
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}
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