The generic kernel imports cpu.zig as @import("arch") but still spoke
x86: readCr3/readCr2, pml4 and rip/rsp parameters, lapicHz/tscHz,
ioapicEntry*, IST stacks, APIC ids. Rename the public interface so the
same names work for x86_64, aarch64, and riscv64:
- readCr3 -> activePageTable; pml4 params -> root; vectorName ->
exceptionName; postCode -> checkpoint; lapicHz/tscHz ->
timerClockHz/clockHz; ioapicEntry* -> irqRoute*; ist_stack_size/
setApIstStack -> fault_stack_size/setFaultStack; startSecondary
takes a hw_id (APIC id here; MPIDR/hart id elsewhere)
- New trap-frame accessors (instructionPointer, stackPointer,
fromUser, faultAddress, syscallNumber/syscallArg/setSyscallResult)
so the generic syscall dispatcher and fault printer never name an
x86 register; readCr2 folds into faultAddress (null unless #PF)
- Generic-kernel identifiers follow: Task.pml4 -> aspace, rsp -> sp,
user_rip/user_rsp -> user_ip/user_sp, PerCpu.apic_id -> hw_id
PlatformConfig fields and the ACPI apic_id stay as-is: they describe
hardware actually discovered on this platform, and another arch would
define its own. The user-mode tests now assert fromUser instead of
the exact CS selector; the user-pf expectation follows the fault
printer's RIP -> IP label. All 28 QEMU tests pass.
Daniel Samson
7384a730be