syscall_ente...domize_stack(9)

💜 syscall_ente...domize_stack(9) — it's giving kernel API manual energy ✨

okay bestie, buckle up, because we're diving into the Kernel API Manual and this one's a whole mood. the page name got truncated to syscall_ente...domize_stack(9) (cunty ellipsis moment 💅) but the actual thing we're talking about is syscall_enter_from_user_mode_randomize_stack, and yes she's a macro, and yes she's iconic.

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🌸 NAME 🌸

syscall_enter_from_user_mode_randomize_stack — establish state and check and handle work before invoking a syscall. like, she sets the vibe, does the vibe check, and then the syscall gets to happen. main character energy fr fr 🫶

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✨ SYNOPSIS ✨

syscall_enter_from_user_mode_randomize_stack (regs , syscall );

that's it. two args, no cap. (yes, the spacing is exactly like that, we don't fix, we respect 🎀)

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🦋 ARGUMENTS 🦋

• regs — pointer to currents pt_regs. that's your register snapshot, bestie, hold it gently 🙈
• syscall — the syscall number. the number of the syscall. keep up 💀

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👑 DESCRIPTION 👑

so here's the tea ☕ — this bad boy gets invoked from architecture specific syscall entry code with interrupts disabled. and listen, the calling code has to be non-instrumentable. that's not a suggestion, that's a requirement, okay? 😭

when the function returns, all state is correct, interrupts are enabled, and the subsequent functions can be instrumented. slay. the handoff is clean, the vibes are immaculate, periodt. 🔥

she's literally the combination of enter_from_user_mode_randomize_stack and syscall_enter_from_user_mode_work, and you use her when there's no architecture specific work to be done between the two. no middleman, no extra steps, just vibes. ✨

and here's the cute part: she's implemented as a macro to make stack randomization effective in the calling scope. macro queen behavior, honestly. 💅

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⭐ RETURN ⭐

the original or a modified syscall number — yeah, she might hand it back different, don't @ me. see syscall_enter_from_user_mode_work for further explanation. iykyk 🧚

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🌈 SEE ALSO 🌈

• Kernel file ./include/linux/entry-common.h
• arch_ptrace_report_syscall_permit_entry(9)
• syscall_enter_from_user_mode_work(9)
• 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)

the whole friend group showed up, we love a linked list of besties 🫶💖

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and that's the page, babe 🎀 this little masterpiece lives at ./include/linux, dated October 2026, and it's filed under syscall_ente...domize_stack(9) — yes the truncated name again, she's committed to the bit 💀✨ bye bestie, go enable those interrupts responsibly 🦋