Exception stuff

Makefile

@@ -10,7 +10,7 @@ LDFLAGS		= -Wl,--oformat=binary -ffreestanding -nostdlib -shared -Ttext 0x1000 -
 
 # VM/Debug settings
 VM			= qemu-system-x86_64
-VMFLAGS		= -serial stdio
+VMFLAGS		= -serial stdio -no-reboot -no-shutdown -d int
 
 
 # Do not touch these.

kernel/idt.c

@@ -31,7 +31,7 @@ void exception_handler() {
 		uint* eip_ptr = 0xe223;
 		uint eip = *eip_ptr;	
 		buf = itoa(eip, buf, 16);
-		print(" ptr: ", EXC_COLOR);
+		print(" eax= ", EXC_COLOR);
 		print(buf, 0x0e);
 	}
 

kernel/isr.asm

@@ -7,10 +7,8 @@ isr_stub_%+%1:
 	mov [isr_debug_ptr], byte %1
 
 	; Save the instruction pointer
-	push eax
-	;mov eax, eip
-	mov [isr_eip_ptr], dword eax
 	pop eax
+	mov [isr_eip_ptr], dword eax
 
 	; Handle the exception
 	call exception_handler

kernel/kernel.c

@@ -66,7 +66,7 @@ void kernel_init() {
 
 	clear_screen();
 	print_kernel_motd();
-	//print_kernel_stats();
+	print_kernel_stats();
 
 	char* buf;
 	uint i = 0;

lib/conv.c

@@ -6,7 +6,6 @@ char* itoa( int value, char * str, int base ) {
 	char* ptr;
 	char* low;
 
-	// Check for supported base.
 	if( base < 2 || base > 36 ) {
 		*str = '\0';
 		return str;
@@ -21,21 +20,16 @@ char* itoa( int value, char * str, int base ) {
 			if(value < 0)
 				*ptr++ = '-';
 	}
-
-	// Remember where the numbers start.
 	low = ptr;
 
-	// The actual conversion.
 	do {
-		// Modulo is negative for negative value. This trick makes abs() unnecessary.
 		*ptr++ = "zyxwvutsrqponmlkjihgfedcba9876543210123456789abcdefghijklmnopqrstuvwxyz"[35 + value % base];
 		value /= base;
 	} while(value);
 
-	// Terminating the string.
 	*ptr-- = '\0';
 
-	// Invert the numbers.
+	// Invert
 	while ( low < ptr ) {
 		char tmp = *low;
 		*low++ = *ptr;