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grisun0 edited this page Oct 9, 2026 · 16 revisions

headers: kernel

Community 0 | 143 files | cohesion 0.88

Definition

This community groups 143 file(s) rooted at headers with dominant language c (cohesion 0.88). Central symbols: A20_CONTROL_PORT, A20_ENABLE_BIT, A20_RESET_CLEAR_MASK, ABI_BAD_FORMAT, ABI_CHECKSUM_MISMATCH, ABI_H, ABI_MANIFEST_MAX, ABI_MANIFEST_NAME. Core file: headers/kernel.h (410 symbols). Documented purpose: SMP application-processor bootstrap stub..

Files

headers (46 files)

File Language Layer Symbols Doc
headers/abi.h h utility 10 yes
headers/ap_stub.h h testing 0 yes

tests (28 files)

File Language Layer Symbols Doc
tests/test_abi.c c testing 2 yes
tests/test_arena.c c testing 2 yes

kernel (25 files)

File Language Layer Symbols Doc
kernel/abi.c c utility 3 yes
kernel/batch.c c utility 1 yes

drivers (14 files)

File Language Layer Symbols Doc
drivers/block.c c infrastructure 19 yes
drivers/driver.c c infrastructure 8 yes

headers/drivers (8 files)

File Language Layer Symbols Doc
headers/drivers/kbd.h h infrastructure 24 yes
headers/drivers/modifiers.h h infrastructure 11 yes

fs (7 files)

File Language Layer Symbols Doc
fs/ext4.c c utility 38 yes
fs/fat32.c c utility 31 yes

. (4 files)

File Language Layer Symbols Doc
kernel.c c utility 16 yes
qga.c c utility 27 yes

kernel/mm (3 files)

File Language Layer Symbols Doc
kernel/mm/cow.c c utility 28 yes

arch/x86 (2 files)

File Language Layer Symbols Doc
arch/x86/ap_entry.S S utility 9 yes

arch/x86/boot (2 files)

File Language Layer Symbols Doc
arch/x86/boot/stage1.S S utility 11 yes

headers/arch/x86 (2 files)

File Language Layer Symbols Doc
headers/arch/x86/hal_io.h h utility 69 yes

headers/arch/x86/boot (1 files)

File Language Layer Symbols Doc
headers/arch/x86/boot/bootdefs.h h utility 151 yes

headers/kernel (1 files)

File Language Layer Symbols Doc
headers/kernel/console_in.h h utility 11 yes

... and 123 more files in this community.

Key Symbols

Internal vs External Edges

  • Internal resolved imports (EXTRACTED): 301
  • Cross-boundary resolved imports (EXTRACTED): 42

Connections

  • [EXTRACTED] depends_on community 0 <-> 6 (strength 0.9): Extracted import edge crosses communities: drivers/nvme.c imports headers/drivers/pci.h.
  • [EXTRACTED] depends_on community 0 <-> 3 (strength 0.9): Extracted import edge crosses communities: headers/kernel.h imports progs/minios_abi.h.
  • [EXTRACTED] depends_on community 0 <-> 5 (strength 0.9): Extracted import edge crosses communities: headers/vga_fb.h imports headers/wm_notify.h.
  • [EXTRACTED] depends_on community 0 <-> 4 (strength 0.9): Extracted import edge crosses communities: kernel/syscalls.c imports headers/ktime.h.
  • [INFERRED] shares_context community 0 <-> 7 (strength 0.5): Inferred shared context (layer utility) with no import path between community 0 (headers: kernel) and community 7 (progs/doomgeneric: net_defs).
  • [INFERRED] shares_context community 0 <-> 9 (strength 0.5): Inferred shared context (language c and layer utility) with no import path between community 0 (headers: kernel) and community 9 (orphans).

Risks

  • [layer strict] tests/test_httpd.c (testing) -> headers/httpd.h (presentation)
  • [dataflow DEAD_STORE] drivers/sb16.c:259 sb16_pump dst: dst assigned at line 259 but never read afterwards.
  • [dataflow DEAD_STORE] drivers/sb16.c:531 sb16_init major: major assigned at line 531 but never read afterwards.
  • [dataflow DEAD_STORE] drivers/virtio_blk.c:169 vblk_desc d: d assigned at line 169 but never read afterwards.
  • [dataflow DEAD_STORE] drivers/virtio_blk.c:189 vblk_avail_push a: a assigned at line 189 but never read afterwards.
  • [dataflow DEAD_STORE] fs/kfile.c:103 kpipe_pair ref: ref assigned at line 103 but never read afterwards.
  • [dataflow UNINIT_USE] kernel/loader.c:925 ldso_bind_into symname: symname may be read before initialization (declared line 889).
  • [dataflow DEAD_STORE] kernel/loader.c:1074 load_exec_elf base: base assigned at line 1074 but never read afterwards.
  • [dataflow DEAD_STORE] kernel/loader.c:1079 load_exec_elf max_end: max_end assigned at line 1079 but never read afterwards.
  • [dataflow DEAD_STORE] kernel/mm/cow.c:116 cow_rehash ref: ref assigned at line 116 but never read afterwards.
  • [dataflow DEAD_STORE] kernel/mm/paging.c:43 mm_setup_protections pd: pd assigned at line 43 but never read afterwards.
  • [dataflow DEAD_STORE] kernel/mm/paging.c:685 honest pt: pt assigned at line 685 but never read afterwards.
  • [dataflow DEAD_STORE] kernel/sched.c:625 irqstat_report txf: txf assigned at line 625 but never read afterwards.
  • [dataflow DEAD_STORE] kernel/sched.c:1372 syscall wheel: wheel assigned at line 1372 but never read afterwards.
  • [dataflow DEAD_STORE] kernel/sched.c:2053 proc_spawn_elf_inner frame: frame assigned at line 2053 but never read afterwards.

Open Questions

  • Why do 11 file(s) lack file-level docs (e.g. arch/x86/syscall_entry.S)? What purpose do they serve?
  • What would break if the most connected file in headers: kernel changed?
  • Should headers: kernel be split, given cohesion 0.88?

Sources

Generated offline by readmenator from commit d64a8fe9383a. Edits here are overwritten by readmenator . --rebuild.

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