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include: one folder per subsystem, and includes that name it

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Sixty-five headers sat side by side in include/, so `#include "irq.h"`
said nothing about where irq.h was or what it belonged to, and errno.h,
stat.h and fcntl.h at the top shadowed the system's for any host tool
built with -I./include. They are in folders now -- arch/ core/ fs/
dev/ gfx/ net/ uapi/ (and ldls/ for the Linux driver layer) -- and
every include names the folder, as Linux's do: "core/proc.h".

Done mechanically and checked the hard way: the kernel built from this
tree disassembles identically to the one built from the tree before
it. The full image boots, and userland is the same set of programs.
Paths in docs and comments follow; docs/guides/layout.md has a table
of what is where, and tools/fix-includes.py rewrites old-style
includes from the folders in the tree, for code written before this.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01S1giNvrHTrPMPw7V6x1kQ4
This commit is contained in:
Nexoniarz 2026-10-23 15:05:12 +02:00
commit a1c965da1e
267 changed files with 1560 additions and 1440 deletions
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6
kernel/arch/x86_64/trapasm.S
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@ -9,7 +9,7 @@
# on EXIT to user (sysretq or iretq), write proc->fs_base to MSR.
#
# proc->fs_base is at byte offset 0x18 (24) inside struct proc.
# proc pointer is at %gs:24 (PERCPU_PROC in include/proc.h); cpu is at %gs:16.
# proc pointer is at %gs:24 (PERCPU_PROC in include/core/proc.h); cpu is at %gs:16.
# -----------------------------------------------------------------------
# Helper macro: write kernel_fs_base to IA32_FS_BASE.
@ -49,9 +49,9 @@
# Clobbers %rax, %rcx, %rdx. Caller must save them if needed.
# -----------------------------------------------------------------------
.macro WRITE_USER_FS
# proc, from the per-CPU block at %gs:24 (PERCPU_PROC in include/proc.h).
# proc, from the per-CPU block at %gs:24 (PERCPU_PROC in include/core/proc.h).
# This used to be %fs:(-8), the __thread slot, which no longer exists --
# see the comment in include/proc.h for why those stopped being __thread.
# see the comment in include/core/proc.h for why those stopped being __thread.
movq %gs:24, %rax # proc pointer
movq 0x18(%rax), %rax # proc->fs_base (offset 24 = 0x18)
movq %rax, %rdx