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290 lines
4.4 KiB
290 lines
4.4 KiB
; Defined in isr.c
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[extern isr_handler]
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; Common ISR code
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isr_common_stub:
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; 1. Save CPU state
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pusha ; Pushes edi,esi,ebp,esp,ebx,edx,ecx,eax
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mov ax, ds ; Lower 16-bits of eax = ds.
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push eax ; save the data segment descriptor
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mov ax, 0x10 ; kernel data segment descriptor
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mov ds, ax
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mov es, ax
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mov fs, ax
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mov gs, ax
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; 2. Call C handler
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call isr_handler
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; 3. Restore state
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pop eax
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mov ds, ax
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mov es, ax
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mov fs, ax
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mov gs, ax
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popa
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add esp, 8 ; Cleans up the pushed error code and pushed ISR number
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sti
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iret ; pops 5 things at once: CS, EIP, EFLAGS, SS, and ESP
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; We don't get information about which interrupt was caller
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; when the handler is run, so we will need to have a different handler
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; for every interrupt.
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; Furthermore, some interrupts push an error code onto the stack but others
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; don't, so we will push a dummy error code for those which don't, so that
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; we have a consistent stack for all of them.
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; First make the ISRs global
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global isr0
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global isr1
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global isr2
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global isr3
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global isr4
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global isr5
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global isr6
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global isr7
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global isr8
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global isr9
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global isr10
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global isr11
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global isr12
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global isr13
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global isr14
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global isr15
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global isr16
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global isr17
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global isr18
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global isr19
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global isr20
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global isr21
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global isr22
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global isr23
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global isr24
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global isr25
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global isr26
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global isr27
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global isr28
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global isr29
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global isr30
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global isr31
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; 0: Divide By Zero Exception
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isr0:
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cli
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push byte 0
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push byte 0
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jmp isr_common_stub
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; 1: Debug Exception
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isr1:
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cli
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push byte 0
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push byte 1
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jmp isr_common_stub
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; 2: Non Maskable Interrupt Exception
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isr2:
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cli
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push byte 0
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push byte 2
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jmp isr_common_stub
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; 3: Int 3 Exception
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isr3:
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cli
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push byte 0
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push byte 3
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jmp isr_common_stub
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; 4: INTO Exception
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isr4:
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cli
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push byte 0
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push byte 4
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jmp isr_common_stub
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; 5: Out of Bounds Exception
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isr5:
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cli
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push byte 0
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push byte 5
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jmp isr_common_stub
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; 6: Invalid Opcode Exception
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isr6:
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cli
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push byte 0
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push byte 6
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jmp isr_common_stub
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; 7: Coprocessor Not Available Exception
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isr7:
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cli
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push byte 0
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push byte 7
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jmp isr_common_stub
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; 8: Double Fault Exception (With Error Code!)
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isr8:
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cli
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push byte 8
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jmp isr_common_stub
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; 9: Coprocessor Segment Overrun Exception
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isr9:
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cli
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push byte 0
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push byte 9
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jmp isr_common_stub
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; 10: Bad TSS Exception (With Error Code!)
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isr10:
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cli
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push byte 10
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jmp isr_common_stub
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; 11: Segment Not Present Exception (With Error Code!)
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isr11:
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cli
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push byte 11
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jmp isr_common_stub
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; 12: Stack Fault Exception (With Error Code!)
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isr12:
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cli
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push byte 12
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jmp isr_common_stub
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; 13: General Protection Fault Exception (With Error Code!)
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isr13:
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cli
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push byte 13
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jmp isr_common_stub
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; 14: Page Fault Exception (With Error Code!)
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isr14:
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cli
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push byte 14
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jmp isr_common_stub
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; 15: Reserved Exception
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isr15:
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cli
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push byte 0
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push byte 15
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jmp isr_common_stub
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; 16: Floating Point Exception
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isr16:
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cli
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push byte 0
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push byte 16
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jmp isr_common_stub
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; 17: Alignment Check Exception
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isr17:
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cli
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push byte 0
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push byte 17
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jmp isr_common_stub
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; 18: Machine Check Exception
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isr18:
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cli
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push byte 0
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push byte 18
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jmp isr_common_stub
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; 19: Reserved
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isr19:
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cli
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push byte 0
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push byte 19
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jmp isr_common_stub
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; 20: Reserved
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isr20:
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cli
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push byte 0
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push byte 20
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jmp isr_common_stub
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; 21: Reserved
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isr21:
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cli
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push byte 0
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push byte 21
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jmp isr_common_stub
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; 22: Reserved
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isr22:
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cli
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push byte 0
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push byte 22
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jmp isr_common_stub
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; 23: Reserved
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isr23:
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cli
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push byte 0
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push byte 23
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jmp isr_common_stub
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; 24: Reserved
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isr24:
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cli
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push byte 0
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push byte 24
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jmp isr_common_stub
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; 25: Reserved
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isr25:
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cli
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push byte 0
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push byte 25
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jmp isr_common_stub
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; 26: Reserved
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isr26:
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cli
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push byte 0
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push byte 26
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jmp isr_common_stub
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; 27: Reserved
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isr27:
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cli
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push byte 0
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push byte 27
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jmp isr_common_stub
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; 28: Reserved
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isr28:
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cli
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push byte 0
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push byte 28
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jmp isr_common_stub
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; 29: Reserved
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isr29:
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cli
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push byte 0
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push byte 29
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jmp isr_common_stub
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; 30: Reserved
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isr30:
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cli
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push byte 0
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push byte 30
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jmp isr_common_stub
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; 31: Reserved
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isr31:
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cli
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push byte 0
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push byte 31
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jmp isr_common_stub
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