ReleaseNotes: add lld/ELF notes #80393
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@@ -29,8 +29,50 @@ ELF Improvements | |
| * ``--fat-lto-objects`` option is added to support LLVM FatLTO. | ||
| Without ``--fat-lto-objects``, LLD will link LLVM FatLTO objects using the | ||
| relocatable object file. (`D146778 <https://reviews.llvm.org/D146778>`_) | ||
| * ``-Bsymbolic-non-weak`` is added to directly bind non-weak definitions. | ||
| (`D158322 <https://reviews.llvm.org/D158322>`_) | ||
| * ``--lto-validate-all-vtables-have-type-infos``, which complements | ||
| ``--lto-whole-program-visibility``, is added to disable unsafe whole-program | ||
| devirtualization. ``--lto-known-safe-vtables=<glob>`` can be used | ||
| to mark known-safe vtable symbols. | ||
| (`D155659 <https://reviews.llvm.org/D155659>`_) | ||
| * ``--save-temps --lto-emit-asm`` now derives ELF/asm file names from bitcode file names. | ||
| ``ld.lld --save-temps a.o d/b.o -o out`` will create ELF relocatable files | ||
| ``out.lto.a.o``/``d/out.lto.b.o`` instead of ``out1.lto.o``/``out2.lto.o``. | ||
| (`#78835 <https://github.com/llvm/llvm-project/pull/78835>`_) | ||
| * ``--no-allow-shlib-undefined`` now reports errors for DSO referencing | ||
| non-exported definitions. | ||
| (`#70769 <https://github.com/llvm/llvm-project/pull/70769>`_) | ||
| * common-page-size can now be larger than the system page-size. | ||
| (`#57618 <https://github.com/llvm/llvm-project/issues/57618>`_) | ||
| * When call graph profile information is available due to instrumentation or | ||
| sample PGO, input sections are now sorted using the new ``cdsort`` algorithm, | ||
| better than the previous ``hfsort`` algorithm. | ||
| (`D152840 <https://reviews.llvm.org/D152840>`_) | ||
| * Symbol assignments like ``a = DEFINED(a) ? a : 0;`` are now handled. | ||
| (`#65866 <https://github.com/llvm/llvm-project/pull/65866>`_) | ||
| * ``OVERLAY`` now supports optional start address and LMA | ||
| (`#77272 <https://github.com/llvm/llvm-project/pull/77272>`_) | ||
| * Relocations referencing a symbol defined in ``/DISCARD/`` section now lead to | ||
| an error. | ||
| (`#69295 <https://github.com/llvm/llvm-project/pull/69295>`_) | ||
| * For AArch64 MTE, global variable descriptors have been implemented. | ||
| (`D152921 <https://reviews.llvm.org/D152921>`_) | ||
| * ``R_AARCH64_GOTPCREL32`` is now supported. | ||
| (`#72584 <https://github.com/llvm/llvm-project/pull/72584>`_) | ||
| * ``R_LARCH_PCREL20_S2``/``R_LARCH_ADD6``/``R_LARCH_CALL36`` and extreme code | ||
| model relocations are now supported. | ||
| * ``--emit-relocs`` is now supported for RISC-V linker relaxation. | ||
| (`D159082 <https://reviews.llvm.org/D159082>`_) | ||
| * Call relaxation respects RVC when mixing +c and -c relocatable files. | ||
| (`#73977 <https://github.com/llvm/llvm-project/pull/73977>`_) | ||
| * ``R_RISCV_GOT32_PCREL`` is now supported. | ||
| (`#72587 <https://github.com/llvm/llvm-project/pull/72587>`_) | ||
| * ``R_RISCV_SET_ULEB128``/``R_RISCV_SUB_ULEB128`` relocations are now supported. | ||
| (`#72610 <https://github.com/llvm/llvm-project/pull/72610>`_) | ||
| (`#77261 <https://github.com/llvm/llvm-project/pull/77261>`_) | ||
| * RISC-V TLSDESC is now supported. | ||
| (`#79239 <https://github.com/llvm/llvm-project/pull/79239>`_) | ||
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There was a problem hiding this comment. Could be worth adding There was a problem hiding this comment. Good call, as well as R_RISCV_GOT32_PCREL (#72587) There was a problem hiding this comment. Thanks for the addition. Added both. |
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| Breaking changes | ||
| ---------------- | ||
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Could be worth adding
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Thanks for the suggestion! I noticed this and GOT32_PCREL and was wondering whether they are minor. But your mentioning this made it clear it is worth mentioning:)
This entry may motivate wasm and Mach-O folks to implement a similar change.
(I am actually self motivated to do this if I have some spare time)