[isrs] Interrupt Service Routines
This commit is contained in:
Kevin Lange
parent
e826e3fad1
commit
a331c106f6
2
Makefile
2
Makefile
@ -7,7 +7,7 @@ install: kernel
|
||||
cp kernel /mnt/kernel
|
||||
umount /mnt
|
||||
|
||||
kernel: start.o link.ld main.o vga.o gdt.o idt.o
|
||||
kernel: start.o link.ld main.o vga.o gdt.o idt.o isrs.o
|
||||
ld -m elf_i386 -T link.ld -o kernel *.o
|
||||
|
||||
%.o: %.c
|
||||
|
||||
BIN
bootdisk.img
BIN
bootdisk.img
Binary file not shown.
2
idt.c
2
idt.c
@ -26,7 +26,7 @@ extern void idt_load();
|
||||
* Set an IDT gate
|
||||
*/
|
||||
void
|
||||
set_idt_gate(
|
||||
idt_set_gate(
|
||||
unsigned char num,
|
||||
unsigned long base,
|
||||
unsigned short sel,
|
||||
|
||||
@ -20,4 +20,16 @@ extern void init_video();
|
||||
extern void gdt_install();
|
||||
extern void gdt_set_gate(int num, unsigned long base, unsigned long limit, unsigned char access, unsigned char gran);
|
||||
|
||||
/* IDT */
|
||||
extern void idt_install();
|
||||
extern void idt_set_gate(unsigned char num, unsigned long base, unsigned short sel, unsigned char flags);
|
||||
|
||||
/* Registers */
|
||||
struct regs {
|
||||
unsigned int gs, fs, es, ds;
|
||||
unsigned int edi, esi, ebp, esp, ebx, edx, ecx, eax;
|
||||
unsigned int int_no, err_code;
|
||||
unsigned int eip, cs, eflags, useresp, ss;
|
||||
};
|
||||
|
||||
#endif
|
||||
|
||||
117
isrs.c
Normal file
117
isrs.c
Normal file
@ -0,0 +1,117 @@
|
||||
#include <system.h>
|
||||
|
||||
/*
|
||||
* Exception Handlers
|
||||
*/
|
||||
extern void _isr0();
|
||||
extern void _isr1();
|
||||
extern void _isr2();
|
||||
extern void _isr3();
|
||||
extern void _isr4();
|
||||
extern void _isr5();
|
||||
extern void _isr6();
|
||||
extern void _isr7();
|
||||
extern void _isr8();
|
||||
extern void _isr9();
|
||||
extern void _isr10();
|
||||
extern void _isr11();
|
||||
extern void _isr12();
|
||||
extern void _isr13();
|
||||
extern void _isr14();
|
||||
extern void _isr15();
|
||||
extern void _isr16();
|
||||
extern void _isr17();
|
||||
extern void _isr18();
|
||||
extern void _isr19();
|
||||
extern void _isr20();
|
||||
extern void _isr21();
|
||||
extern void _isr22();
|
||||
extern void _isr23();
|
||||
extern void _isr24();
|
||||
extern void _isr25();
|
||||
extern void _isr26();
|
||||
extern void _isr27();
|
||||
extern void _isr28();
|
||||
extern void _isr29();
|
||||
extern void _isr30();
|
||||
extern void _isr31();
|
||||
|
||||
void
|
||||
isrs_install() {
|
||||
/* Exception Handlers */
|
||||
idt_set_gate(0, (unsigned)_isr0, 0x08, 0x8E);
|
||||
idt_set_gate(1, (unsigned)_isr1, 0x08, 0x8E);
|
||||
idt_set_gate(2, (unsigned)_isr2, 0x08, 0x8E);
|
||||
idt_set_gate(3, (unsigned)_isr3, 0x08, 0x8E);
|
||||
idt_set_gate(4, (unsigned)_isr4, 0x08, 0x8E);
|
||||
idt_set_gate(5, (unsigned)_isr5, 0x08, 0x8E);
|
||||
idt_set_gate(6, (unsigned)_isr6, 0x08, 0x8E);
|
||||
idt_set_gate(7, (unsigned)_isr7, 0x08, 0x8E);
|
||||
idt_set_gate(8, (unsigned)_isr8, 0x08, 0x8E);
|
||||
idt_set_gate(9, (unsigned)_isr9, 0x08, 0x8E);
|
||||
idt_set_gate(10, (unsigned)_isr10, 0x08, 0x8E);
|
||||
idt_set_gate(11, (unsigned)_isr11, 0x08, 0x8E);
|
||||
idt_set_gate(12, (unsigned)_isr12, 0x08, 0x8E);
|
||||
idt_set_gate(13, (unsigned)_isr13, 0x08, 0x8E);
|
||||
idt_set_gate(14, (unsigned)_isr14, 0x08, 0x8E);
|
||||
idt_set_gate(15, (unsigned)_isr15, 0x08, 0x8E);
|
||||
idt_set_gate(16, (unsigned)_isr16, 0x08, 0x8E);
|
||||
idt_set_gate(17, (unsigned)_isr17, 0x08, 0x8E);
|
||||
idt_set_gate(18, (unsigned)_isr18, 0x08, 0x8E);
|
||||
idt_set_gate(19, (unsigned)_isr19, 0x08, 0x8E);
|
||||
idt_set_gate(20, (unsigned)_isr20, 0x08, 0x8E);
|
||||
idt_set_gate(21, (unsigned)_isr21, 0x08, 0x8E);
|
||||
idt_set_gate(22, (unsigned)_isr22, 0x08, 0x8E);
|
||||
idt_set_gate(23, (unsigned)_isr23, 0x08, 0x8E);
|
||||
idt_set_gate(24, (unsigned)_isr24, 0x08, 0x8E);
|
||||
idt_set_gate(25, (unsigned)_isr25, 0x08, 0x8E);
|
||||
idt_set_gate(26, (unsigned)_isr26, 0x08, 0x8E);
|
||||
idt_set_gate(27, (unsigned)_isr27, 0x08, 0x8E);
|
||||
idt_set_gate(28, (unsigned)_isr28, 0x08, 0x8E);
|
||||
idt_set_gate(29, (unsigned)_isr29, 0x08, 0x8E);
|
||||
idt_set_gate(30, (unsigned)_isr30, 0x08, 0x8E);
|
||||
idt_set_gate(31, (unsigned)_isr31, 0x08, 0x8E);
|
||||
}
|
||||
|
||||
unsigned char *exception_messages[] = {
|
||||
"division by zero",
|
||||
"debug",
|
||||
"non-maskable interrupt",
|
||||
"breakpoint",
|
||||
"detected overflow",
|
||||
"out-of-bounds",
|
||||
"invalid opcode",
|
||||
"no coprocessor",
|
||||
"double fault",
|
||||
"coprocessor segment overrun",
|
||||
"bad TSS",
|
||||
"segment not present",
|
||||
"stack fault",
|
||||
"general protection fault",
|
||||
"page fault",
|
||||
"unknown interrupt",
|
||||
"coprocessor fault",
|
||||
"alignment check",
|
||||
"machine check",
|
||||
"reserved",
|
||||
"reserved",
|
||||
"reserved",
|
||||
"reserved",
|
||||
"reserved",
|
||||
"reserved",
|
||||
"reserved",
|
||||
"reserved",
|
||||
"reserved",
|
||||
"reserved",
|
||||
"reserved",
|
||||
"reserved",
|
||||
"reserved"
|
||||
};
|
||||
|
||||
void fault_handler(struct regs *r) {
|
||||
if (r->int_no < 32) {
|
||||
puts(exception_messages[r->int_no]);
|
||||
puts(" exception. System halted.\n");
|
||||
for (;;);
|
||||
}
|
||||
}
|
||||
1
main.c
1
main.c
@ -103,6 +103,7 @@ int
|
||||
main() {
|
||||
gdt_install();
|
||||
idt_install();
|
||||
isrs_install();
|
||||
init_video();
|
||||
puts("Good Morning!\n");
|
||||
for (;;);
|
||||
|
||||
275
start.asm
275
start.asm
@ -54,7 +54,282 @@ idt_load:
|
||||
ret
|
||||
|
||||
; Interrupt Service Routines
|
||||
global _isr0
|
||||
global _isr1
|
||||
global _isr2
|
||||
global _isr3
|
||||
global _isr4
|
||||
global _isr5
|
||||
global _isr6
|
||||
global _isr7
|
||||
global _isr8
|
||||
global _isr9
|
||||
global _isr10
|
||||
global _isr11
|
||||
global _isr12
|
||||
global _isr13
|
||||
global _isr14
|
||||
global _isr15
|
||||
global _isr16
|
||||
global _isr17
|
||||
global _isr18
|
||||
global _isr19
|
||||
global _isr20
|
||||
global _isr21
|
||||
global _isr22
|
||||
global _isr23
|
||||
global _isr24
|
||||
global _isr25
|
||||
global _isr26
|
||||
global _isr27
|
||||
global _isr28
|
||||
global _isr29
|
||||
global _isr30
|
||||
global _isr31
|
||||
|
||||
; 0: Divide By Zero Exception
|
||||
_isr0:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 0
|
||||
jmp isr_common_stub
|
||||
|
||||
; 1: Debug Exception
|
||||
_isr1:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 1
|
||||
jmp isr_common_stub
|
||||
|
||||
; 2: Non Maskable Interrupt Exception
|
||||
_isr2:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 2
|
||||
jmp isr_common_stub
|
||||
|
||||
; 3: Int 3 Exception
|
||||
_isr3:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 3
|
||||
jmp isr_common_stub
|
||||
|
||||
; 4: INTO Exception
|
||||
_isr4:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 4
|
||||
jmp isr_common_stub
|
||||
|
||||
; 5: Out of Bounds Exception
|
||||
_isr5:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 5
|
||||
jmp isr_common_stub
|
||||
|
||||
; 6: Invalid Opcode Exception
|
||||
_isr6:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 6
|
||||
jmp isr_common_stub
|
||||
|
||||
; 7: Coprocessor Not Available Exception
|
||||
_isr7:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 7
|
||||
jmp isr_common_stub
|
||||
|
||||
; 8: Double Fault Exception (With Error Code!)
|
||||
_isr8:
|
||||
cli
|
||||
push byte 8
|
||||
jmp isr_common_stub
|
||||
|
||||
; 9: Coprocessor Segment Overrun Exception
|
||||
_isr9:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 9
|
||||
jmp isr_common_stub
|
||||
|
||||
; 10: Bad TSS Exception (With Error Code!)
|
||||
_isr10:
|
||||
cli
|
||||
push byte 10
|
||||
jmp isr_common_stub
|
||||
|
||||
; 11: Segment Not Present Exception (With Error Code!)
|
||||
_isr11:
|
||||
cli
|
||||
push byte 11
|
||||
jmp isr_common_stub
|
||||
|
||||
; 12: Stack Fault Exception (With Error Code!)
|
||||
_isr12:
|
||||
cli
|
||||
push byte 12
|
||||
jmp isr_common_stub
|
||||
|
||||
; 13: General Protection Fault Exception (With Error Code!)
|
||||
_isr13:
|
||||
cli
|
||||
push byte 13
|
||||
jmp isr_common_stub
|
||||
|
||||
; 14: Page Fault Exception (With Error Code!)
|
||||
_isr14:
|
||||
cli
|
||||
push byte 14
|
||||
jmp isr_common_stub
|
||||
|
||||
; 15: Reserved Exception
|
||||
_isr15:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 15
|
||||
jmp isr_common_stub
|
||||
|
||||
; 16: Floating Point Exception
|
||||
_isr16:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 16
|
||||
jmp isr_common_stub
|
||||
|
||||
; 17: Alignment Check Exception
|
||||
_isr17:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 17
|
||||
jmp isr_common_stub
|
||||
|
||||
; 18: Machine Check Exception
|
||||
_isr18:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 18
|
||||
jmp isr_common_stub
|
||||
|
||||
; 19: Reserved
|
||||
_isr19:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 19
|
||||
jmp isr_common_stub
|
||||
|
||||
; 20: Reserved
|
||||
_isr20:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 20
|
||||
jmp isr_common_stub
|
||||
|
||||
; 21: Reserved
|
||||
_isr21:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 21
|
||||
jmp isr_common_stub
|
||||
|
||||
; 22: Reserved
|
||||
_isr22:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 22
|
||||
jmp isr_common_stub
|
||||
|
||||
; 23: Reserved
|
||||
_isr23:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 23
|
||||
jmp isr_common_stub
|
||||
|
||||
; 24: Reserved
|
||||
_isr24:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 24
|
||||
jmp isr_common_stub
|
||||
|
||||
; 25: Reserved
|
||||
_isr25:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 25
|
||||
jmp isr_common_stub
|
||||
|
||||
; 26: Reserved
|
||||
_isr26:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 26
|
||||
jmp isr_common_stub
|
||||
|
||||
; 27: Reserved
|
||||
_isr27:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 27
|
||||
jmp isr_common_stub
|
||||
|
||||
; 28: Reserved
|
||||
_isr28:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 28
|
||||
jmp isr_common_stub
|
||||
|
||||
; 29: Reserved
|
||||
_isr29:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 29
|
||||
jmp isr_common_stub
|
||||
|
||||
; 30: Reserved
|
||||
_isr30:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 30
|
||||
jmp isr_common_stub
|
||||
|
||||
; 31: Reserved
|
||||
_isr31:
|
||||
cli
|
||||
push byte 0
|
||||
push byte 31
|
||||
jmp isr_common_stub
|
||||
|
||||
extern fault_handler
|
||||
|
||||
isr_common_stub:
|
||||
pusha
|
||||
push ds
|
||||
push es
|
||||
push fs
|
||||
push gs
|
||||
mov ax, 0x10
|
||||
mov ds, ax
|
||||
mov es, ax
|
||||
mov fs, ax
|
||||
mov gs, ax
|
||||
mov eax, esp
|
||||
push eax
|
||||
mov eax, fault_handler
|
||||
call eax
|
||||
pop eax
|
||||
pop gs
|
||||
pop fs
|
||||
pop es
|
||||
pop ds
|
||||
popa
|
||||
add esp, 8
|
||||
iret
|
||||
|
||||
; BSS Section
|
||||
SECTION .bss
|
||||
|
||||
Loading…
Reference in New Issue
Block a user