[interrupt-handlers] adding exception/interrupt handler support for hyperlight guest #250
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…rrupt/exception handlers - interrupt handler entry stubs = -- global asm definitions for different _do_excp0-20 + _do_excp30 + hwint0-15 (which will prob. be unused for a while) via declarative macros -- global asm definitions for context_save and context_restore to save registers before interrupt handling - tmp interrupt/exception handlers that are used by the _do_excp* and hwint* fxns. Notes: (1) it's likely we won't use all exceptions/hw interrupts that I am creating externs for, they are all there mostly for completion. (2) this is asm for 64-bit mode and follows sysv64 calling convention ABI. Signed-off-by: danbugs <[email protected]>
- added IdtEntry structure (w/ some tmp hardcoded values in its new impl for now), - created IDT static mut array, and - made fxns to init_idt and set_idt_entry. Signed-off-by: danbugs <[email protected]>
- made IDTR structure to house the IDT, - made load_idt fxn that uses global_asm's lidt to load the IDT, and - added fxn calls to entrypoint to init_idt and load_idt (location debatable?). Signed-off-by: danbugs <[email protected]>
Note: temporarily modified hyperlight-host's hello-world example to call dividebyzero for testing. Signed-off-by: danbugs <[email protected]>
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// TODO: description
closes #228