[SYSVABI] Add example that ifunc resolvers are indirectly called#324
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smithp35 merged 1 commit intoARM-software:mainfrom Jun 25, 2025
Merged
[SYSVABI] Add example that ifunc resolvers are indirectly called#324smithp35 merged 1 commit intoARM-software:mainfrom
smithp35 merged 1 commit intoARM-software:mainfrom
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An ifunc resolver function needs a BTI as it is called indirectly via the dynamic loader when resolving the R_AARCH64_IRELATIVE relocation. When static linking the relocation is also resolved via an indirect branch to the resolver from a local resolver function like _dl_relocate_static_pie in glibc.
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FWIW both clang and gcc add a BTI to the ifunc resolver already. This is just to make sure it is covered in the documentation. |
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An ifunc resolver function needs a BTI as it is called indirectly via the dynamic loader when resolving the R_AARCH64_IRELATIVE relocation. When static linking the relocation is also resolved via an indirect branch to the resolver from a local resolver function like _dl_relocate_static_pie in glibc.