Followup to: <Pine.LNX.4.10.10009221122090.1647-100000@penguin.transmeta.com>
By author: Linus Torvalds <torvalds@transmeta.com>
In newsgroup: linux.dev.kernel
>
> Remember: debug traps work even without debuggers. You can use a "int 3"
> in your program if you want to have self-debug somewhere. Not many people
> do it, of course, but there's nothing fundamentally wrong in just catching
> SIGTRAP yourself, and doing something special on debug events.
>
This is sometimes used to patch code at runtime, since it's a
single-byte instruction.
-hpa
-- <hpa@transmeta.com> at work, <hpa@zytor.com> in private! "Unix gives you enough rope to shoot yourself in the foot." http://www.zytor.com/~hpa/puzzle.txt - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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