Add support for a classic monolithic OS - #2549

Draft

stlankes wants to merge 45 commits into

hermit-os:mainfrom

Commits on Aug 13, 2026

feat(fork): implement classic Unix fork with Copy-on-Write
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9c12ad2
create independent fd tables for each process
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fa7ded3
fix(clippy): resolve all warnings in common-os build
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3c99d6c
mm/x86_64: fix COW page leak by reference-counting shared frames
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f7e0bef
x86_64: track page fault count in IRQ statistics
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a3adf08
syscall: add spawn_process syscall (number 16)
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a2cac53
kernel: scope idle task OBJECT_MAP to unikernel builds
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6d80ca7
fix(fork): stop leaking stack frames in copy_kernel_stack_to
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9063114
register remaining syscalls in dispatch table
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41cd7ba
Add user-space thread spawning with per-thread TLS for common-os
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9dcc926
Add sys_exec syscall and clear_user_space for process image replacement
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e2fa1bb
x86_64: clear registers before jumping into the user-space
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6f92e3c
fix(aarch64): add support od macOS HVF on Apple Silicon
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b4b825c
aarch64/mm: add common-os page-table and address-space primitives
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9db745d
aarch64: implement load_application and jump_to_user_land
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dab9aa3
aarch64: SVC syscall dispatcher and EL0 vector handlers
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aa344e1
aarch64: fork()/exec() with copy-on-write page faults
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c0b4ca6
x86_64: avoid unneeded TLB flushes
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b850ff2
remove user-mode heap demand-paging
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b192c03
aarch64: support user-space thread spawning for common-os
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f474b6e
introduce feature fork to enable the support of the system call fork
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dfc120e
fix fork refcount for non-COW user pages
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ed3ebc3
arch: take argv by owned Vec in jump_to_user_land and drop before eret
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0019182
mm: introduce per-task VMA list and sys_mmap
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39333d9
arch: register VMAs for loaded image and per-thread TLS
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ffbf683
arch: lazy-map user pages via VMA lookup in the fault handler
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a319122
x86_64: convert VirtAddr at last/user_stack_pointer assignments
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a6e0fe8
mm/vma: move user heap into L0[USER_L0_INDEX] for proper fork isolation
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36185d5
arch: zero and refcount lazily-mapped user pages
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85aa1a7
arch: tighten user stack layout under common-os
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9df1558
scheduler: track a process id
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23c5515
x86_64/syscall: disable interrupts before swapgs on syscall return
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df18ffb
timer: swapgs

mkroening
authored and
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f294a54
remove mfence

mkroening
authored and
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3f243ab
x86_64/fork: keep user RSP per-task across syscalls
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bbfc097
cleanup: dedupe stdio bootstrap and tighten imports
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2e2a458
arch: canonicalize module paths and enable common-os on aarch64
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e3061e2
style: apply rustfmt and tidy up imports across arch modules
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c293b9e
remove some typos
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2d46201
remove clippy and compiler warnings
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3cdd482
pass argument vector and environment to user processes
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94dae40
add riscv64 support for spawn_process and exec (common-os)
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08fd0fb
add fork with copy-on-write for riscv64
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68cda52
feat(fd): add pipe for inter-process communication
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fb1d497

Commits on Aug 14, 2026

remove some copiler warnings and minor compilor errors
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c4a0d14