Robert Allan JamesandClaude Opus 5.5
df150e8626
xhci_cmd_address_device() sized the Output Device Context for Slot + EP0 (64 bytes); xhci_cmd_configure_endpoint() then allocated a bigger copy and repointed DCBAA[slot_id]. The controller keeps the address it was given at Address Device (QEMU caches it), so every bulk Endpoint Context was written past the 64-byte block into the next kmalloc header -- on every USB mass-storage attach, every ISA. After O-C's smoke campaign reshuffled the heap, a kfree at thumbdrive unplug walked into it: #GP in coalesce_neighbors(). Found with temporary instrumentation (load base, code bytes at RIP, event crumbs, a heap-list checker): the corrupt word was an EP Context (Bulk IN, Running, MPS 1024) exactly DCI 3 x 32 bytes into the 64-byte context. Now: XHCI_DEVICE_CTX_BYTES (32 contexts x 32 bytes) allocated once per slot at Address Device, zeroed whole, never reallocated; Configure Endpoint just fills it. Also ends the per-attach leak of the old context. Verified: heap checker clean from boot; campaign -> O-A -> MINT -> unplug -> re-attach passes with 0 exceptions; 3-ISA acceptance passes, parity and dict_hash set unchanged. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
include/starkernel/
Headers for LithosAnanke, the bare-metal UEFI kernel (src/starkernel/).
Built only via Makefile.starkernel; gated by __STARKERNEL__ when shared
with hosted code.
uefi.h— UEFI protocol/type definitions consumed by the loader.elf64.h,elf_loader.h— ELF64 parsing and kernel-image loading.boot_info_offsets.h— struct-offset constants shared between the assembly bootstrap and the C boot path.arch.h,apic.h,timer.h— architecture init, APIC interrupt controller, timer (TSC/HPET/APIC, 100 Hz heartbeat).console.h,framebuffer.h,vt100.h— UART 16550 console, framebuffer driver, and VT100 terminal emulation over the framebuffer.pmm.h,vmm.h,kmalloc.h— physical memory manager (bitmap allocator), 4-level x86_64 paging, kernel heap allocator.pci.h,virtio_blk.h— PCI enumeration and the VirtIO block device driver (disk backend for the kernel block subsystem).capsule.h,capsule_birth.h,capsule_loader.h,capsule_run.h,capsule_vm_physics.h,capsule_generated.h— capsule system types, birth protocol, physics-runtime capsule bindings, and the build-time- generated capsule directory (seetools/mkcapsule.c).kernel_args.h,cmdline.h— boot-time kernel argument parsing (starforth.cfg/ command line).repl.h— kernel REPL.log.h,doe_log.h— kernel logging and DoE metrics logging.q48_16.h— kernel-build copy of Q48.16 fixed-point arithmetic.xxhash64.h— content-addressing hash used for capsule IDs.hal_memory.h— hardware-abstraction-layer memory interface.
Subdirectories:
hal/— top-level hardware-abstraction-layer interface.vm/— kernel VM subsystem headers (capsule arena, parity logging, bootstrap wiring).freestanding/— minimal libc-shim headers (assert.h,ctype.h,errno.h,inttypes.h,math.h,sched.h,signal.h,stdio.h,stdlib.h,string.h,time.h,sys/time.h,sys/types.h) for building shared VM code in the freestanding kernel environment, where no real libc is available.