1 files changed, 103 insertions, 0 deletions
diff --git a/kernel/exceptions.c b/kernel/exceptions.c
new file mode 100644
index 0000000..3030b9c
--- /dev/null
+++ b/kernel/exceptions.c
@@ -0,0 +1,103 @@
+#include "kernel.h"
+#include "exceptions.h"
+
+#include "asm_x86.h"
+#include "smp.h"
+
+static void defklog(uint32_t esp)
+{
+    klog("EXCEPTION: eip: 0x%08X",*(uint32_t *)esp);
+    esp+=4;
+    klog("EXCEPTION: segment: 0x%08X",*(uint16_t *)esp);
+    esp+=4;
+    klog("EXCPETION: eflags: 0x%08X",*(uint32_t *)esp);
+}
+
+static void show_selector_error(uint32_t err)
+{
+   klog("Selector Error Details:");
+   klog("External Event: %x",err&0b1);
+   klog("Location: 0x%x (0-GDT/1-IDT/2-LDT/3-IDT)",err&0b110);
+   klog("Selector: 0x%x",err&0b1111111111111000);
+}
+
+static void show_page_fault_error(uint32_t error_code)
+{
+   klog("Page Fault Error Details:");
+   klog("error_code_P (Present): %d",error_code&1?1:0);
+   klog("error_code_W/R (Write): %d",error_code&2?1:0);
+   klog("error_code_U/S (User): %d",error_code&4?1:0);
+   klog("error_code_RSVD (Reserved Write) : %d",error_code&8?1:0);
+   klog("error_code_I/D (Instruction Fetch): %d",error_code&16?1:0);
+   klog("at addr: 0x%08X",x86_get_cr(2));
+}
+
+void exception_handle(uint32_t esp, uint32_t irq)  
+{
+    uint32_t error_code=0;
+
+    klog("EXCEPTION: apicID: 0x%08X",apicID());
+    klog("EXCEPTION: vector nr.: %d",irq);
+
+    switch(irq){ //this interrupts push also an error_code
+	case 8:
+	case 10:
+	case 11:
+	case 12:
+	case 13:
+	case 14:
+	case 17:
+	case 30:
+	    error_code = *(uint32_t *)esp;
+	    esp+=4;
+    }
+    klog("EXCEPTION: error_code: %d",irq);
+    defklog(esp);
+
+    switch(irq){
+	case 0:
+	    kpanic("Divide by 0");
+	case 1:
+	    kpanic("Single step (debugger)");
+	case 2:
+	    kpanic("Non Maskable Interrupt");
+	case 3:
+	    kpanic("Breakpoint (debugger)");
+	case 4:
+	    kpanic("Overflow");
+	case 5:
+	    kpanic("Bounds check");
+	case 6:
+	    kpanic("Undefined OP Code");
+	case 7:
+	    kpanic("No coprocessor");
+	case 8:
+	    kpanic("Double Fault");
+	case 9:
+	    kpanic("Coprocessor Segment Overrun");
+	case 10:
+	    show_selector_error(error_code);
+	    kpanic("Invalid TSS");
+	case 11:
+	    show_selector_error(error_code);
+	    kpanic("Segment Not Present");
+	case 12:
+	    show_selector_error(error_code);
+	    kpanic("Stack Segment Overrun");
+	case 13:
+	    show_selector_error(error_code);
+	    kpanic("Exception: Fault: General Protection Fault");
+	case 14:
+	    show_page_fault_error(error_code);
+	    kpanic("Exception: Fault: Page Fault");
+	case 15:
+	    kpanic("RESERVED");
+	case 16:
+	    kpanic("Coprocessor error");
+	case 17:
+	    kpanic("Alignment Check");
+	case 18:
+	    kpanic("Machine Check");
+    }
+}
+