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/** @file interrupt_asm.S
*
* @brief fault and interrupt handlers.
*
* @author Hanjie Wu (hanjiew)
* @bug No functional bugs
*/
#include <x86/seg.h>
#include <x86/interrupt_defines.h>
#define SEGSEL_KERNEL_FS SEGSEL_SPARE2
.global default_handler
default_handler:
iret
.macro FAULT_HANDLER_ERR name cause
.global \name\()_handler
.type \name\()_handler, %function
\name\()_handler:
pusha /* save a ureg_t structure */
push %gs
push %fs
push %es
push %ds
mov %cr2, %eax
push %eax
push $\cause
mov $SEGSEL_KERNEL_DS, %eax
mov %ax, %ds
mov %ax, %es
mov $SEGSEL_KERNEL_FS, %eax
mov %ax, %fs
cld
push %esp
call handle_fault
add $0xc, %esp /* skip cr2, cause and argument */
pop %ds
pop %es
pop %fs
pop %gs
popa
add $0x4, %esp /* skip error code */
iret
.endm
.macro FAULT_HANDLER_NOERR name cause
.global \name\()_handler
.type \name\()_handler, %function
\name\()_handler:
push $0 /* dummy error code */
pusha
push %gs
push %fs
push %es
push %ds
mov %cr2, %eax
push %eax
push $\cause
mov $SEGSEL_KERNEL_DS, %eax
mov %ax, %ds
mov %ax, %es
mov $SEGSEL_KERNEL_FS, %eax
mov %ax, %fs
cld
push %esp
call handle_fault
add $0xc, %esp /* skip cr2, cause and argument */
pop %ds
pop %es
pop %fs
pop %gs
popa
add $0x4, %esp /* skip error code */
iret
.endm
FAULT_HANDLER_NOERR de 0x0
FAULT_HANDLER_NOERR db 0x1
FAULT_HANDLER_NOERR nmi 0x2
FAULT_HANDLER_NOERR bp 0x3
FAULT_HANDLER_NOERR of 0x4
FAULT_HANDLER_NOERR br 0x5
FAULT_HANDLER_NOERR ud 0x6
FAULT_HANDLER_NOERR nm 0x7
FAULT_HANDLER_ERR df 0x8
FAULT_HANDLER_NOERR cso 0x9
FAULT_HANDLER_ERR ts 0xa
FAULT_HANDLER_ERR np 0xb
FAULT_HANDLER_ERR ss 0xc
FAULT_HANDLER_ERR gp 0xd
FAULT_HANDLER_ERR pf 0xe
FAULT_HANDLER_ERR fault_15 0xf
FAULT_HANDLER_NOERR mf 0x10
FAULT_HANDLER_ERR ac 0x11
FAULT_HANDLER_NOERR mc 0x12
FAULT_HANDLER_NOERR xf 0x13
.global timer_handler
.type timer_handler, %function
timer_handler:
pusha /* save a stack_frame_t structure */
push %ds
push %es
push %fs
push %gs
mov $SEGSEL_KERNEL_DS, %eax
mov %ax, %ds
mov %ax, %es
mov $SEGSEL_KERNEL_FS, %eax
mov %ax, %fs
cld
push %esp
call timer_handler_real
add $0x4, %esp
jmp return_to_user /* check pending exit before iret */
.global kbd_handler
.type kbd_handler, %function
kbd_handler:
pusha /* save a stack_frame_t structure */
push %ds
push %es
push %fs
push %gs
mov $SEGSEL_KERNEL_DS, %eax
mov %ax, %ds
mov %ax, %es
mov $SEGSEL_KERNEL_FS, %eax
mov %ax, %fs
cld
push %esp
call kbd_handler_real
add $0x4, %esp
jmp return_to_user /* check pending exit before iret */
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