Kernel's interruptions. More...

#include "lib.asm"
#include "boot/io.asm"

Include dependency graph for interrupts-asm.c:

Functions
void	addInterrupt (number, function)
	add interruption More...

void	setInterrupts (void)
	Set system interruptions. More...

void	syscall (void)
	System interruption 0x20. More...

Detailed Description

Kernel's interruptions.

About interrupts:

When interrupt handler is called on stack are: [esp]=old eip [esp+2]=old cs [esp+4] old flags

to use local interrupt's variables DS must be changed to local i.e. KERNEL_ADDRESS

all cs of interrupt handler are KERNEL_ADDRESS - only kernel should handle

Todo:: divZero is error handle, not only zero division https://gcc.gnu.org/onlinedocs/gcc/x86-Function-Attributes.html#x86-Function-Attributes see error code

Definition in file interrupts-asm.c.

Function Documentation

add interruption

set *(number*4)=function

set *(number*4+2)=KERNEL_ADDRESS - only kernel can handle interruptions

Parameters

number	new interruption number [ebp+8]
function	interruption handler [ebp+12]

Definition at line 23 of file interrupts-asm.c.

void setInterrupts ( void )

Set system interruptions.

set syscall and errors handles

Definition at line 32 of file interrupts-asm.c.

void syscall ( void )

System interruption 0x20.

it adds:

AH	Description	AL	BX
0	putc()	character
1	puts()		address of string
2	puti()		unsigned number
3	printf()		address of first parameter on stack, next is 4B behind on stack etc.

Definition at line 47 of file interrupts-asm.c.