kernel: panic

kernel-src/include/panic.h

@@ -0,0 +1,8 @@
+#ifndef _PANIC_H
+#define _PANIC_H
+
+#include <arch/context.h>
+
+__attribute__((noreturn)) void _panic(char *msg, context_t *ctx);
+
+#endif

kernel-src/include/x86-64/arch/context.h

@@ -2,6 +2,7 @@
 #define _CONTEXT_H
 
 #include <stdint.h>
+#include <printf.h>
 
 typedef struct {
         uint64_t cr2;
@@ -32,7 +33,11 @@ typedef struct {
 	uint64_t ss;
 } __attribute__((packed)) context_t;
 
-#define ARCH_CTX_SP(x) x->rsp;
-#define ARCH_CTX_IP(x) x->rip;
+#define CTX_SP(x) x->rsp;
+#define CTX_IP(x) x->rip;
+#define PRINT_CTX(x) { \
+	printf("cr2: %016lx  gs: %04x\nrax: %016lx  fs: %04x\nrbx: %016lx  es: %04x\nrcx: %016lx  ds: %04x\nrdx: %016lx  cs: %04x\n r8: %016lx  ss: %04x\n r9: %016lx r10: %016lx\nr11: %016lx r12: %016lx\nr13: %016lx r14: %016lx\nr15: %016lx rdi: %016lx\nrsi: %016lx rbp: %016lx\nrip: %016lx rsp: %016lx\nerr: %016lx rfl: %016lx\n", \
+	x->cr2, x->gs, x->rax, x->fs, x->rbx, x->es, x->rcx, x->ds, x->rdx, x->cs, x->r8, x->ss, x->r9, x->r10, x->r11, x->r12, x->r13, x->r14, x->r15, x->rdi, x->rsi, x->rbp, x->rip, x->rsp, x->error, x->rflags); \
+}
 
 #endif

kernel-src/lib/panic.c

@@ -0,0 +1,15 @@
+#include <panic.h>
+#include <arch/cpu.h>
+#include <printf.h>
+
+__attribute__((noreturn)) void _panic(char *msg, context_t *ctx) {
+	printf("Oops.\n");
+
+	if (msg)
+		printf("%s\n", msg);
+
+	if (ctx)
+		PRINT_CTX(ctx);
+
+	for (;;);
+}

kernel-src/sys/interrupt.c

@@ -2,10 +2,13 @@
 #include <logging.h>
 #include <arch/cpu.h>
 #include <arch/context.h>
+#include <panic.h>
 
 void interrupt_isr(int vec, context_t *ctx) {
 	isr_t *isr = &_cpu()->isr[vec];
-	__assert(isr->func);
+	if (isr->func == NULL)
+		_panic("Unregistered interrupt", ctx);
+
 	// TODO ipl check
 	isr->func(isr, ctx);