112 lines
1.7 KiB
ArmAsm
112 lines
1.7 KiB
ArmAsm
; Dispatching to our interrupt handler code from assembly because some of this is
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; enourmous pain in C
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; Save the register state
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; call the C handler
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; executes iret(expects the stack to look like struct stack_state)
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; If the interrupt we need to handle doesn't produce an error code then must provide a 0
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; for consistency
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extern interrupt_handler
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extern cpu_reg_state
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extern stack_state
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%macro no_err_handler 1
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global interrupt_handler_%1 ; defined in interrupts.h
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interrupt_handler_%1:
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push dword 0
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push dword %1
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jmp common_int_handler
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%endmacro
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; deals with the intterrupts that do give us an error code
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%macro err_code_handler 1
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global interrupt_handler_%1
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interrupt_handler_%1:
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push dword %1
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jmp common_int_handler
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%endmacro
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common_int_handler:
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; save thigns before do our C-call
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pushad
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;push eax
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;push ecx
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;push edx
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;push ebx
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;push esp
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;push ebp
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;push esi
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;push edi
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;push ds
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;push es
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;push fs
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;push gs
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call interrupt_handler
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; segments
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pop gs
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pop fs
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pop es
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pop ds
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pop edi
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pop esi
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pop ebp
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pop esp
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pop ebx
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pop edx
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pop ecx
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pop eax
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add esp, 8
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; special instruction which lets us jump back to code
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; which was previously interrupted
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iret
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no_err_handler 1
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no_err_handler 2
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no_err_handler 3
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no_err_handler 4
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no_err_handler 5
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no_err_handler 6
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no_err_handler 7
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err_code_handler 8
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no_err_handler 9
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err_code_handler 10
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err_code_handler 11
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err_code_handler 12
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err_code_handler 13
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err_code_handler 14
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no_err_handler 15
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no_err_handler 16
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err_code_handler 17
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no_err_handler 18
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no_err_handler 19
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no_err_handler 20
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no_err_handler 21
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no_err_handler 22
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no_err_handler 23
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no_err_handler 24
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no_err_handler 25
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no_err_handler 26
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no_err_handler 27
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no_err_handler 28
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no_err_handler 29
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no_err_handler 30
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no_err_handler 31
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no_err_handler 32
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