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| author | Paul Kirth <paulkirth@google.com> | 2024-07-02 08:23:03 -0700 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-07-02 08:23:03 -0700 |
| commit | b146a57f6739846f7749daad099882fbd33e3066 (patch) | |
| tree | c9b058d4a3459735149ebafc0bdd35a11e843ff1 /lld | |
| parent | cfbad45339edb4a512982d9180e6fd4bae781d8a (diff) | |
| download | llvm-b146a57f6739846f7749daad099882fbd33e3066.zip llvm-b146a57f6739846f7749daad099882fbd33e3066.tar.gz llvm-b146a57f6739846f7749daad099882fbd33e3066.tar.bz2 | |
Reapply "[RISCV] Support RISCV Atomics ABI attributes (#84597)"
This patch adds support for the atomic_abi attribute, specifid in
https://github.com/riscv-non-isa/riscv-elf-psabi-doc/blob/master/riscv-elf.adoc#tag_riscv_atomic_abi-14-uleb128version.
This was previously reverted due to ld.bfd segfaulting w/ unknown riscv
attributes. Attribute emission is now guarded by a backend flag
`--riscv-abi-attributes`, which is off by default. Linker support in
LLD for attribute merging is now in a standalone patch.
Reviewers: kito-cheng, MaskRay, asb
Reviewed By: MaskRay
Pull Request: https://github.com/llvm/llvm-project/pull/90266
Diffstat (limited to 'lld')
| -rw-r--r-- | lld/ELF/Arch/RISCV.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lld/ELF/Arch/RISCV.cpp b/lld/ELF/Arch/RISCV.cpp index e4d6325..281567e 100644 --- a/lld/ELF/Arch/RISCV.cpp +++ b/lld/ELF/Arch/RISCV.cpp @@ -1134,6 +1134,10 @@ mergeAttributesSection(const SmallVector<InputSectionBase *, 0> §ions) { case RISCVAttrs::PRIV_SPEC_MINOR: case RISCVAttrs::PRIV_SPEC_REVISION: break; + + case RISCVAttrs::AttrType::ATOMIC_ABI: + // TODO: Handle ATOMIC_ABI tag merging + continue; } // Fallback for deprecated priv_spec* and other unknown attributes: retain |