ftrace_location(9)

🌸 ftrace_location(9) — a Kernel API Manual moment 💅

okay bestie, welcome to the ftrace_location(9) page, straight out of the Kernel API Manual ✨ this one's short and sweet and honestly kind of iconic for it 🎀

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💖 NAME 💖

ftrace_location — returns the ftrace location, that's literally the whole job, no cap 🫶

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✨ SYNOPSIS ✨

unsigned long ftrace_location (unsigned long ip );

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🦋 ARGUMENTS 🦋

• ip — bestie, this is the instruction pointer you want checked 👀 that's the one and only thing you hand over.

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⭐ RETURN ⭐

so here's the vibe check on what you get back 💫

• If ip matches the ftrace location, you get ip right back. matching, slay 💅
• If ip matches sym+0, you get sym's ftrace location. we love a glow-up 🧚
• Otherwise? you get 0. nothing. zero. a little heartbreaking honestly 😭

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🌈 SEE ALSO 🌈

the whole friend group 💜 — Kernel file ./kernel/trace/ftrace.c, plus:

• ftrace_lookup_ip(9)
• ftrace_free_filter(9)
• ftrace_hash_move(9)
• ftrace_location_range(9)
• ftrace_text_reserved(9)
• ftrace_bug(9)
• ftrace_update_record(9)
• ftrace_test_record(9)
• ftrace_get_addr_new(9)
• ftrace_get_addr_curr(9)
• ftrace_rec_iter_start(9)
• ftrace_rec_iter_next(9)
• ftrace_rec_iter_record(9)
• ftrace_run_stop_machine(9)
• arch_ftrace_update_code(9)
• ftrace_startup_subops(9)
• ftrace_shutdown_subops(9)
• ftrace_regex_open(9)
• allocate_ftrace_func_mapper(9)
• ftrace_func_mapper_find_ip(9)
• ftrace_func_mapper_add_ip(9)
• ftrace_func_mapper_remove_ip(9)
• free_ftrace_func_mapper(9)
• register_ftrace_direct(9)
• unregister_ftrace_direct(9)
• modify_ftrace_direct_nolock(9)
• modify_ftrace_direct(9)
• hash_add(9)
• update_ftrace_direct_add(9)
• hash_sub(9)
• update_ftrace_direct_del(9)
• update_ftrace_direct_mod(9)
• ftrace_set_filter_ip(9)
• ftrace_set_filter_ips(9)
• ftrace_ops_set_global_filter(9)
• ftrace_set_filter(9)
• ftrace_set_notrace(9)
• ftrace_set_global_filter(9)
• ftrace_set_global_notrace(9)
• ftrace_ops_get_func(9)
• ftrace_kill(9)
• ftrace_is_dead(9)
• register_ftrace_function(9)
• unregister_ftrace_function(9)
• ftrace_lookup_symbols(9)

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🫶 that's the whole page, bestie — go forth and trace responsibly ✨

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and that's a wrap, babe 🎀 this lil section lives in ./kernel/trace, dated October 2026, and it's ftrace_location(9) forever and always 💖 periodt 🌟