force_sig_seccomp(9)

💖 force_sig_seccomp 💖

okay so welcome to the Kernel API Manual bestie, this is the page for force_sig_seccomp(9) and it's honestly kinda iconic — it's the thing that lets a task get yeeted with a special signal so in-process syscall emulation can do its thing. let's go 🎀

---

✨ SYNOPSIS ✨

int force_sig_seccomp (int syscall , int reason , bool force_coredump );

like literally that's the whole signature, no notes 💅

---

🌸 ARGUMENTS 🌸

• syscall — the syscall number you're sending on up to userland 🫶
• reason — the filter-supplied reason code that gets sent to userland (it rides along via si_errno) ✨
• force_coredump — true if you want to trigger a coredump, false if not. choose wisely bestie 😭

---

💫 DESCRIPTION 💫

okay so short version: this bad boy forces a SIGSYS with a code of SYS_SECCOMP, plus the related sigsys info attached. that's it. that's the whole vibe. no cap 🔥

so when a seccomp filter decides "nah, we're handling this syscall ourselves in userspace," this is the mechanism that signals the task so in-process syscall emulation can actually happen. main character energy honestly 👑

---

🦋 SEE ALSO 🦋

the kernel file ./kernel/signal.c and like, a whole friend group of (9) friends — go say hi:

• task_set_jobctl_pending(9)
• task_clear_jobctl_trapping(9)
• task_clear_jobctl_pending(9)
• task_participate_group_stop(9)
• ptrace_trap_notify(9)
• do_notify_parent_cldstop(9)
• do_signal_stop(9)
• do_jobctl_trap(9)
• do_freezer_trap(9)
• signal_delivered(9)
• sys_restart_syscall(9)
• set_current_blocked(9)
• sys_rt_sigprocmask(9)
• sys_rt_sigpending(9)
• copy_siginfo_to_external32(9)
• do_sigtimedwait(9)
• sys_rt_sigtimedwait(9)
• sys_kill(9)
• sys_pidfd_send_signal(9)
• sys_tgkill(9)
• sys_tkill(9)
• sys_rt_sigqueueinfo(9)
• sys_sigpending(9)
• sys_sigprocmask(9)
• sys_rt_sigaction(9)
• sys_rt_sigsuspend(9)

---

🌈 that's the whole page bestie, no missing bits, iykyk

---

sign-off szn: this came from the ./kernel source, October 2026 version, filed under force_sig_seccomp(9) in the Kernel API Manual. mwah 💋 stay signal-safe out there, love u, bye 🎀💖