Messages in this thread | | | Date | Tue, 16 Nov 2021 22:46:10 +0800 | Subject | Re: [PATCH v2 1/2] scripts: ftrace - move the sort-processing in ftrace_init to compile time | From | Yinan Liu <> |
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>>> Also, can't sorttable be ran on modules ? >> >> The .ko file will be relocated after insmod or modprobe. >> And the mcount redirection in .ko is based on ".text", >> ".init.text", ".ref.text", ".sched.text", ".spinlock.text", >> ".irqentry .text", ".softirqentry.text", ".kprobes.text", ".cpuidle.text", >> ".text.unlikely". These sections‘ loading >> position are not in definite order. >> >> So sorting this part at compile time doesn't make much sense. > > Bah.. I thought the sections would retain relative position at least, > but alas. if that isn't done you're quite right that sorting seems > pointless. >
I found the problem when I was sorting mcount in .ko. Initially I found that some mcount's relocation base on.text and some base on .init.text.I tried insmod the same .ko several times. The results show that there is no definite order between the two sections,and the same situation occurs in several other mcount base sections.
Best regards! --Yinan liu
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