Fix misaligned loads when loading UEFI arg pointers #122164
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r? compiler |
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@beetrees Thoughts on this versus simply making the ptr reads a |
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@workingjubilee I did consider using |
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sgtm. @Ayush1325 sorry for not catching this. @bors r rollup |
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…iaskrgr Rollup of 9 pull requests Successful merges: - rust-lang#121201 (align_offset, align_to: no longer allow implementations to spuriously fail to align) - rust-lang#122076 (Tweak the way we protect in-place function arguments in interpreters) - rust-lang#122100 (Better comment for implicit captures in RPITIT) - rust-lang#122157 (Add the new description field to Target::to_json, and add descriptions for some MSVC targets) - rust-lang#122164 (Fix misaligned loads when loading UEFI arg pointers) - rust-lang#122171 (Add some new solver tests) - rust-lang#122172 (Don't ICE if we collect no RPITITs unless there are no unification errors) - rust-lang#122197 (inspect formatter: add braces) - rust-lang#122198 (Remove handling for previously dropped LLVM version) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of rust-lang#122164 - beetrees:uefi-argv-align, r=workingjubilee Fix misaligned loads when loading UEFI arg pointers Currently, the two UEFI argument pointers are stored in an `alloca` of alignment 1, a pointer to which is then passed as `argv`. However, [the library code](https://github.com/rust-lang/rust/blob/9c3ad802d9b9633d60d3a74668eb1be819212d34/library/std/src/sys/pal/uefi/mod.rs#L60-L61) treats `argv` as a pointer to an array of pointers and dereferences it as such, meaning that it presumes the `alloca` is aligned to at least the alignment of a pointer. This PR fixes this mismatch by aligning the `alloca` to the alignment of a pointer. This PR also changed the `gep` to use the new `inbounds_ptradd` method.
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Currently, the two UEFI argument pointers are stored in an
allocaof alignment 1, a pointer to which is then passed asargv. However, the library code treatsargvas a pointer to an array of pointers and dereferences it as such, meaning that it presumes theallocais aligned to at least the alignment of a pointer. This PR fixes this mismatch by aligning theallocato the alignment of a pointer.This PR also changed the
gepto use the newinbounds_ptraddmethod.