Robert Allan JamesandClaude Sonnet 5
1c5e926c3f
Used QEMU-side instrumentation (-d int tracing, plus a working chardev-based
monitor -- the older bareword -monitor syntax silently fails on QEMU
10.2.1) as directed. The PM Timer "stall" was never a hang: it was a #DE
divide error cascading to a triple fault, which -no-reboot converts into a
silent clean QEMU exit -- indistinguishable from a hang without tracing,
and why arch_relax() (solving a hang that didn't exist) had no effect.
Root cause and fix documented in full (also see commit b43e51a).
With the fix, amd64 boot at -O2 now proceeds far past the original stall --
through capsule birth and into Hermes's word registration -- before hitting
a second, different fault (Finding 4): a direct #GP at IDT index 32
(APIC_TIMER_VECTOR), not yet root-caused. Same silent-triple-fault-exit
shape, so this was very likely bundled into "the hang" before tracing
distinguished the two separate bugs.
-O2 reverted again (uncommitted); muldiv64's fix is kept, real and
independently verified at unchanged -O0 on all three architectures.
Routine three-arch artifacts from this session's verification runs
included.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
2.8 KiB
2.8 KiB
StarKernel UEFI Loader
Loading kernel from ESP...
[CKPT 001] Entered efi_main - ConOut live
RAW SERIAL UP
[CKPT 002] Serial (COM1) initialized
Monolithic build - kernel linked directly
Collecting boot information...
CmdLine: parsed OK
[CKPT 004] Command line parsed
[CKPT 005] Kernel stack allocation decided
[CKPT 006] Boot info collected (ACPI table located)
GOP: linear framebuffer found
[CKPT 007] GOP: linear framebuffer found
[CKPT 008] About to enter ExitBootServices retry loop
EBS...
EBS OK
Calling kernel_main (monolithic)...
_____ _ _ __ _
/ ____| | | |/ / | |
| (___ | |_ __ _ _ __| ' / ___ _ __ _ __ ___| |
\___ \| __/ _` | '__| < / _ \ '__| '_ \ / _ \ |
____) | || (_| | | | . \ __/ | | | | | __/ |
|_____/ \__\__,_|_| |_|\_\___|_| |_| |_|\___|_|
LithosAnanke v1.5.4
Architecture: amd64
Build: Aug 11 2026 11:46:56
UEFI BootServices: EXITED
=== StarKernel Boot Information ===
Memory map entries: 113
Total memory: 1023 MB
Usable memory: 967 MB
===================================
PMM initialized.
PMM statistics:
Total pages: 248976
Free pages : 247453
Used pages : 1523
Total MB : 972
Free MB : 966
Used MB : 5
VMM initialized (mapped RAM, CR3 switched)
VMM initialized (mapped RAM, CR3 switched)
VMM self-test: mapped OK at 0xffff800000000000
VMM self-test complete.
IDT installed.
APIC: init...
APIC: IA32_APIC_BASE MSR=0x00000000fee00900
APIC: stale-ISR drain: 0 EOI(s) issued
APIC: initialized (xAPIC MMIO, TPR=0, SIVR=0x1FF, EOI-clear)
APIC: init done
I/O APIC: init...
I/O APIC: base=0xfec00000, gsi_base=0, overrides=5
override: source=00 gsi=2 flags=0x0000
override: source=05 gsi=5 flags=0x000d
override: source=09 gsi=9 flags=0x000d
override: source=0a gsi=10 flags=0x000d
override: source=0b gsi=11 flags=0x000d
i8042: keyboard ACKed enable-scanning
i8042: IRQ1 enabled in controller config byte
I/O APIC: keyboard IRQ1 routed (masked)
Timer: init...
Timer: init start
Timer: PM_TMR_BLK discovered from FADT at port 1544
Timer: VM mode detected (hypervisor present).
Timer: HPET calibration disabled (VM-exit MMIO would poison timing).
Timer: WARNING: invariant TSC not present under hypervisor.
Timer: continuing in RELATIVE mode (no determinism guarantees).
Timer: RDTSCP not present; using RDTSC (less serialized).
Timer: CPUID frequency unavailable; trying PM Timer...