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go/doc/next/6-stdlib/99-minor/debug/elf/75562.md

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debug/elf: sync new loong64 relocation types up to LoongArch ELF psABI v20250521 Add several new relocation types defined in newer versions of LoongArch ELF psABI v20250521, part of the v2.40 spec bundle. The new relocations are seeing increased adoption because distributions are moving to newer GNU/LLVM toolchain versions, so Go's internal linker must be prepared to handle some of them, especially R_LARCH_CALL36 because the ecosystem is slowly migrating to the "medium" code model by default. The constants R_LARCH_DELETE and R_LARCH_CFA were removed in LoongArch ELF psABI v20231102 (spec bundle v2.20), but they are already part of the public API, so they are retained for now for upholding the go1 compatibility guarantee. Corresponding binutils implementation: * R_LARCH_CALL36: https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=dc5f359ed6a36d2c895d89c3e4886f3a2b6d9232 * TLSDESC: https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=26265e7fdf19d461563388495b6799eb3719f80a * TLS {LD,GD,DESC} relaxation: https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=ae296cc45258b95223210263d1b91115e84beb56 * TLS LE relaxation: https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=775dead218e12e3fb94481c7a99aa0238d6a9138 Updates #75562 See: https://github.com/loongson/la-abi-specs/blob/v2.40/laelf.adoc See: https://github.com/loongson-community/discussions/issues/43 Change-Id: Ib023e0b6becc0862d27afc419d3eb84c737359db Reviewed-on: https://go-review.googlesource.com/c/go/+/709716 Reviewed-by: Mark Freeman <markfreeman@google.com> Reviewed-by: Meidan Li <limeidan@loongson.cn> Reviewed-by: abner chenc <chenguoqi@loongson.cn> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Junyang Shao <shaojunyang@google.com> Reviewed-by: sophie zhao <zhaoxiaolin@loongson.cn>
2025-09-13 15:57:12 +08:00
Additional `R_LARCH_*` constants from [LoongArch ELF psABI v20250521][laelf-20250521]
(global version v2.40) are defined for use with LoongArch systems.
[laelf-20250521]: https://github.com/loongson/la-abi-specs/blob/v2.40/laelf.adoc
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