diff options
Diffstat (limited to 'kc/core/exceptions.S')
| -rw-r--r-- | kc/core/exceptions.S | 84 |
1 files changed, 0 insertions, 84 deletions
diff --git a/kc/core/exceptions.S b/kc/core/exceptions.S deleted file mode 100644 index 0a5b760..0000000 --- a/kc/core/exceptions.S +++ /dev/null @@ -1,84 +0,0 @@ -.extern page_fault_handler -.extern general_protection_handler - -.macro ISR_STORE_REGISTERS - /* just in case something tried to be clever before */ - cld - /* push param registers */ - push %rdi - push %rsi - 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 ISR_RESTORE_REGISTERS - // 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 -.endm - -.macro ISR_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 - -.hidden page_fault_isr -.global page_fault_isr -.type page_fault_isr, @function -page_fault_isr: - ISR_STORE_REGISTERS - /* collect parameters for page fault handler */ - mov 120(%rsp), %rdi /* error code is first parameter */ - mov %cr2, %rsi /* PFLA is next parameter */ - /* stack has to be aligned */ - ISR_CALL page_fault_handler - /* TODO: test for error code here and panic() */ - ISR_RESTORE_REGISTERS - /* unwind the error code from the stack */ - add $8, %rsp - /* leave the isr */ - iretq -.size page_fault_isr, . - page_fault_isr - -.hidden general_protection_isr -.global general_protection_isr -.type general_protection_isr, @function -general_protection_isr: - ISR_STORE_REGISTERS - // TODO: parameters? - ISR_CALL general_protection_handler - add $8, %rsp - ISR_RESTORE_REGISTERS - iretq -.size general_protection_isr, . - general_protection_isr - |