Messages in this thread | | | From | Christophe Leroy <> | Subject | Re: [PATCH 2/2] recordmcount: Handle sections with no non-weak symbols | Date | Tue, 3 May 2022 11:20:22 +0000 |
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Le 03/05/2022 à 01:52, Steven Rostedt a écrit : > On Mon, 2 May 2022 14:44:56 +0000 > Christophe Leroy <christophe.leroy@csgroup.eu> wrote: > >> If we do that after the linking, won't it be a nightmare with the >> trampolines installed by the linker when the destination is over the 24 >> bits limit ? > > Not sure what you mean. The locations I'm talking about is the full > address saved in the __mcount_loc table (data section). >
Maybe I misunderstood. When you say 'after linking', do you mean vmlinux or vmlinux.o ?
In vmlinux, the addresses to be saved in __mcount_loc table might not contain anymore a call to _mcount but a call to a trampoline that jumps to _mcount, in case _mcount is too far from the said location at link time. That's what I meant.
Christophe
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