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(parent: 763f1dd) | patch
x86: add sigreturn trampoline and fix execve stack usage
authorTulio A M Mendes <[email protected]>
Mon, 9 Feb 2026 20:59:27 +0000 (17:59 -0300)
committerTulio A M Mendes <[email protected]>
Mon, 9 Feb 2026 20:59:27 +0000 (17:59 -0300)
commit251b7cfcc490df5fca827bbfc32e1f100c86f786
tree709032ef494d93b3214ffc0eaf555a3eed15f707tree | snapshot
parent763f1dd470514006e2a224b23bbde9107db4625ecommit | diff
x86: add sigreturn trampoline and fix execve stack usage

Implement SYSCALL_SIGRETURN and userland signal trampoline/sigframe so handlers can return safely.
Fix x86 signal delivery stack layout to avoid clobbering sigframe/trampoline.
Fix execve heap corruption by avoiding large on-stack argv/envp buffers and adding cleanup.
Add init.elf smoke test for sigreturn.
include/errno.h diff | blob | blame | history
include/syscall.h diff | blob | blame | history
src/arch/x86/idt.c diff | blob | blame | history
src/kernel/syscall.c diff | blob | blame | history
user/init.c diff | blob | blame | history
AdrOS - A Unix-like Operating System for hobby/academic study.