Mercurial > lcfOS
view cos/kernel/asmcode.asm @ 180:25a0753da4cf
Re-organized files
author | Windel Bouwman |
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date | Thu, 09 May 2013 17:35:19 +0200 |
parents | 91f91ff07ea8 |
children |
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; The default interrupt handlers. ; from 20 - 31 are reserved vectors. ; below are the custom ones! ; Calling convention AMD64 ABI: ; parameters in: rdi, rsi, rdx, rcx .... section .text align 4 ; Function to read the current instruction pointer value: global read_rip read_rip: pop rax jmp rax global loadIDT loadIDT: extern idtP ; TODO: make this pointer thing more insightfull: lidt [idtP] ret global setCR3 setCR3: mov cr3, rdi ; Load cr3 ret ; ISR related assembler wrappers: %macro ISR_NOERRCODE 1 global INT%1 INT%1: cli push strict qword 0 ; push dummy error code push strict qword %1 ; push interrupt number jmp isr_common_stub %endmacro %macro ISR_ERRCODE 1 global INT%1 INT%1: cli ; disable interrupts push strict qword %1 ; push interrupt number jmp isr_common_stub %endmacro isr_common_stub: ; Do some saving: push rax ; regs[6] push rcx push rdx push rbx push rbp push rsi push rdi ; regs[0] ; AMD64 calling convention, first parameter is in rdi: mov rdi, rsp ; Load stack pointer into rdi to indicate where the registers on the stack are (so that we can change them!) ; TODO: load kernel interrupt stack pointer extern isr_handler call isr_handler pop rdi pop rsi pop rbp pop rbx pop rdx pop rcx pop rax add rsp, 16 ; cleanup error code and isr number sti ; enable interrupts again iretq ; Exception handlers: ISR_NOERRCODE 0 ISR_NOERRCODE 1 ISR_NOERRCODE 2 ISR_NOERRCODE 3 ISR_NOERRCODE 4 ISR_NOERRCODE 5 ISR_NOERRCODE 6 ISR_NOERRCODE 7 ISR_ERRCODE 8 ISR_NOERRCODE 9 ISR_ERRCODE 10 ISR_ERRCODE 11 ISR_ERRCODE 12 ISR_ERRCODE 13 ISR_ERRCODE 14 ; 15 is reserved ISR_NOERRCODE 16 ISR_ERRCODE 17 ISR_NOERRCODE 18 ISR_NOERRCODE 19 ; 20 - 31 are reserved ; irq handlers: ISR_NOERRCODE 32 ISR_NOERRCODE 33 ISR_NOERRCODE 34 ISR_NOERRCODE 35 ISR_NOERRCODE 36 ISR_NOERRCODE 37 ISR_NOERRCODE 38 ISR_NOERRCODE 39 ISR_NOERRCODE 40 ISR_NOERRCODE 41 ISR_NOERRCODE 42 ISR_NOERRCODE 43 ISR_NOERRCODE 44 ISR_NOERRCODE 45 ISR_NOERRCODE 46 ISR_NOERRCODE 47 ; default handler: ISR_NOERRCODE 255