diff options
| author | Ada Christine <adachristine18@gmail.com> | 2022-02-13 12:26:58 +0000 |
|---|---|---|
| committer | Ada Christine <adachristine18@gmail.com> | 2022-02-13 12:26:58 +0000 |
| commit | c1d179d50751d0ce08dc2b009fc5e334d20db11a (patch) | |
| tree | c24a48ef55fbfe898b58f61a880ae4e3d96e8440 /kc/core/cpu/exceptions.S | |
| parent | 23f4c7eaa0bae30bebbac68950e96d17c6d77c36 (diff) | |
exception changes
Diffstat (limited to 'kc/core/cpu/exceptions.S')
| -rw-r--r-- | kc/core/cpu/exceptions.S | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/kc/core/cpu/exceptions.S b/kc/core/cpu/exceptions.S new file mode 100644 index 0000000..8a19c8c --- /dev/null +++ b/kc/core/cpu/exceptions.S @@ -0,0 +1,85 @@ +#include "exceptions.h" + +.macro EXCEPTION_BEGIN vec:req, code=0 + // just in case something tried to be clever before + cld + // push param registers + push %rdi + // store certain parameters + movb $\vec,%dil + push %rsi + .if \code + movq 16(%rsp), %rsi + .else + xor %rsi, %rsi + .endif + push %rdx + push %rcx + push %r8 + push %r9 + // caller-saved registers + push %rax + push %r10 + push %r11 + // callee-saved registers + push %rbx + push %rbp + push %r12 + push %r13 + push %r14 + push %r15 +.endm + +.macro EXCEPTION_END vec:req, code=0 + // restore all the registers + pop %r15 + pop %r14 + pop %r13 + pop %r12 + pop %rbp + pop %rbx + pop %r11 + pop %r10 + pop %rax + pop %r9 + pop %r8 + pop %rcx + pop %rdx + pop %rsi + pop %rdi + .if \code + add $8, %rsp + .endif + iretq +.endm + +.macro EXCEPTION_CALL func + // align the stack for the call to the handler function + mov %rsp, %rbp + and $-16, %rsp + call \func + // restore stack pointer, possibly unaligned + mov %rbp, %rsp +.endm + +.macro EXCEPTION_DEFINE name:req, vec:req +\name\()_isr: + .if \vec > 9 && \vec < 15 || \vec == 17 || \vec == 21 || \vec > 28 && \vec < 31 + EXCEPTION_BEGIN \vec, 1 + .else + EXCEPTION_BEGIN \vec + .endif + EXCEPTION_CALL \name\()_handler + .if \vec > 9 && \vec < 15 || \vec == 17 || \vec == 21 || \vec > 28 && \vec < 31 + EXCEPTION_END \vec, 1 + .else + EXCEPTION_END \vec + .endif +.size \name\()_isr, . - \name\()_isr +.endm + +EXCEPTION_DECLARE page_fault PAGE_FAULT_EXCEPTION +EXCEPTION_DECLARE general_protection GENERAL_PROTECTION_EXCEPTION +EXCEPTION_DEFINE page_fault, PAGE_FAULT_EXCEPTION +EXCEPTION_DEFINE general_protection, GENERAL_PROTECTION_EXCEPTION + |