__kprobe_eve...en_cmd_start(9)

💜 __kprobe_event_gen_cmd_start — like, the NAME section, bestie ✨

okay so this is __kprobe_event_gen_cmd_start(9) from the Kernel API Manual, and the whole entire vibe is: generate a kprobe event command from an arg list. that's it, that's the function 🎀

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✨ SYNOPSIS ✨

int __kprobe_event_gen_cmd_start (struct dynevent_cmd *cmd , bool
kretprobe , const char *name , const char *loc , ... );

like literally that's the signature, don't come for me about the line break, it's in the source, periodt 💅

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🌸 ARGUMENTS 🌸

• cmd — a pointer to the dynevent_cmd struct that represents the new event. it's giving "here's the container, put the event in it" 🫶
• kretprobe — bestie. is this a return probe? yes or no. that's the whole question 💀
• name — the name of the kprobe event, like what you're gonna call it
• loc — the location of the kprobe event. where it lives. its address. its home 🏠
• ... — a variable number of arg (pairs), one pair for each field. so many args. infinity args. arg girlbossery 🌈

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🦋 NOTE 🦋

🚨 okay so real talk: users normally won't want to call this function directly. instead you wanna use the kprobe_event_gen_cmd_start wrapper, which automatically adds a NULL to the end of the arg list. that's the whole point of the wrapper, it's the main character. if you do use this function directly, make sure the last arg in the variable arg list is NULL. fr fr. no NULL, no vibes 😭

this generates a kprobe event command that gets executed by kprobe_event_gen_cmd_end. and here's the cute part — you can use this function to generate the complete command, or only the first part of it. in that latter case, kprobe_event_add_fields can be used to add more fields following this. build it in stages, slay 🎀

and lowkey unlike the synth_event_gen_cmd_start, loc must be specified here. not optional. not vibes-based. this returns -EINVAL if loc == NULL. so like. don't do that 🙈

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⭐ RETURN ⭐

0 if successful, error otherwise. that's the tea 👑

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👑 SEE ALSO 👑

• the kernel file ./kernel/trace/trace_kprobe.c
• for_each_trace_kprobe(9)
• kprobe_event_cmd_init(9)
• __kprobe_event_add_fields(9)
• kprobe_event_delete(9)

all iconic, all linked, iykyk 💖

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okay that's the whole page, and yes it lives in ./kernel/trace, and yes it's dated October 2026 — timestamped from the future, main character energy fr. the manpage title is crushed down to __kprobe_eve...en_cmd_start(9) which is giving "the terminal ran out of room and honestly same", and it's from Kernel API Manual (section 9, kernel devs only, no gatekeeping tho). go read trace_kprobe.c bestie ily bye 🧚💜