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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

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I cannot enable HAVE_KPROBES_ON_FTRACE - Kernel compile (programming.dev)

submitted 1 month ago by SpongeB0B@programming.dev to c/linux@lemmy.ml

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Hi,

I have a great piece of software, that apparently need HAVE_KPROBES_ON_FTRACE

To config the kernel option I'm using :

make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- menuconfig

The Kernel is Linux/arm64 6.6.63

When I'm doing a search inside menuconfig i get:

Symbol: HAVE_KPROBES_ON_FTRACE [=n]
Type  : bool
Defined at arch/Kconfig:223


Symbol: KPROBES_ON_FTRACE [=n]
Type  : bool
Defined at arch/Kconfig:117
 Depends on: KPROBES [=y] && HAVE_KPROBES_ON_FTRACE [=n] && DYNAMIC_FTRACE_WITH_REGS [=n]

But I found it no where in the menu... and if I add it mannuly in the .config file, then make some more other adapations in menuconfig my manual entry disappear..

Any ideas ?

Maybe HAVE_KPROBES_ON_FTRACE is not supported in 6.6.63 ?

Thanks

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[–] themoken@startrek.website 1 points 1 month ago (1 children)

It's possible that it's not supported on your arch.

[–] SpongeB0B@programming.dev 1 points 1 week ago (1 children)

Thanks, how can we verify this ?

[–] themoken@startrek.website 1 points 1 week ago

Basically just start with what you're aiming to enable and work backwards (as you've started to do). With judicious use of grep find out where that symbol is defined. If it's in arch configs for other arches but not your own, it's probably that.

There may be better tools out there to do this, but in my experience just sleuthing it out a bit will answer your question. The Kconfig system can be complex, but the files are pretty readable.