enter_from_u...domize_stack(9)

🌸 NAME 🌸

okay so bestie, welcome to the enter_from_u...domize_stack(9) page from the Kernel API Manual ✨ — the function it's actually hyping is enter_from_user_mode_randomize_stack, and its whole thing is: establish state and add stack randomization before invoking syscall_enter_from_user_mode_work(). iconic behavior, no cap 💅.

🎀 SYNOPSIS 🎀

enter_from_user_mode_randomize_stack (regs );

🫶 ARGUMENTS 🫶

• regs — pointer to currents pt_regs. yes, that's the wording, bestie 🫶

💖 DESCRIPTION 💖

so this one gets invoked from architecture specific syscall entry code with interrupts disabled 🔥. the calling code has to be non-instrumentable — like, do not instrument it, periodt 🚫🎻.

when the function returns, all state is correct, interrupts are still disabled, and the subsequent functions can be instrumented ✅. the vibe check is: state good, interrupts still off, instrumentation can resume after.

it's implemented as a macro so that the stack randomization is effective throughout the function in which it is invoked 🧚✨. an inline would only make it effective in the scope of the inline function — and that is not the assignment, bestie 😭.

👑 SEE ALSO 👑

• Kernel file: ./include/linux/entry-common.h
• arch_ptrace_report_syscall_permit_entry(9)
• syscall_enter_from_user_mode_work(9)
• syscall_enter_from_user_mode_randomize_stack(9)
• arch_ptrace_report_syscall_exit(9)
• syscall_exit_work(9)
• syscall_exit_to_user_mode_work(9)
• syscall_exit_to_user_mode(9)

that's the page, bestie 💖 source: ./include/linux · date: October 2026 · manual: enter_from_u...domize_stack(9) — slay, you made it to the end 🎀🦋