Messages in this thread | | | Subject | Re: [PATCH 3/3] objtool: check: Handle calling non-function symbols in other sections | From | Julien Thierry <> | Date | Mon, 21 Sep 2020 10:56:05 +0100 |
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On 9/18/20 9:07 PM, Josh Poimboeuf wrote: > On Tue, Sep 15, 2020 at 08:53:18AM +0100, Julien Thierry wrote: >> Relocation for a call destination could point to a symbol that has >> type STT_NOTYPE. > > Then shouldn't the callee be changed to STT_FUNC? >
Not if it's a code symbol that does not follow standard calling convention.
It's really the same case as the !reloc, except this time it's in a different .text section. In arm64 there are different sections that are used (.text for basic code, .idmap.text for code mapped in a manner where virtual address == physical address, .hyp.text for kvm priviledged code, .tramp.text for trampolines...). There aren't many cases, but some symbols reference symbols in other sections, but the symbol being called isn't a proper function.
-- Julien Thierry
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