Placeholders and todos!(...)

[chl337]

A list of functions/functionalities that are not properly implemented:

• qkernel/src/interrupt/aarch64/mod.rs:
  • init() => Set up GIC
  • InitSingleton()
  • Add check for ESR.ISS.FnV => Sanity check for FAR_El1
• qlib/kernel/SignalDef.rs
  • VDSO_OFFSET_SIGRETURN => replace with proper VDSO parser
  • FP state on signal handling
• qlib/kernel/arch/aarch64/arch_def.rs
  • SanitizeUser() => FP state
  • Reset() => FP state
• qlib/kernel/asm/aarch64.rs
  • AsmHostID() => No native instruction on aarch64
  • fninit() => FPU init
• qlib/kernel/loader/loader.rs
  • HWCAP for aarch64
• qlib/kernel/memmgr/pma.rs
  • PageMgr::Clear()
• qlib/mutex.rs
  • CmpExchg() => No native instruction on aarch64
  • LoadOnce()
• qvisor/src/vmspace/mod.rs
  • HostID()
• backtrace implementation
• SIMD support in kernel (low priority)
• refactor Qlib (priority medium)

NOTE

The placeholders where needed during the porting from x86_64. Because the main branch has also leftovers, before adding implementation check if the function is actually needed or it can be removed.

If you start working on an item of the list

• open a new issue
• reference this one

to avoid duplication.

[shrik3]

if I may add,

1. the signal handling is ignoring the FP state.
2. we don't support SIMD in the kernel (should we? saving/restoring vector registers would be quite expensive.)

[chl337]

On Tue May 14, 2024 at 11:23 PM CEST, Tianhao Wang wrote: if I may add, 1. the signal handling is ignoring the FP state. 2. we don't support SIMD in the kernel (should we? saving/restoring vector registers would be quite expensive.)

Thanks, I added them in the list.

[shrik3]

not only for aarch64: we want breakpoints and gdb! XD