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Can be used with -z rela to use in-relocation addends.\n    Can be used together with --pack-dyn-relocs=relr\n  + -r and --emit-relocs: copy SHT_CREL and rewrite (OutputSection::finalizeNonAllocCrel). supports mixing CREL/RELA\n* llvm-readelf\n  + -S: recognize SHT_CREL\n  + -d: recognize DT_CREL. allow dyn[DT_PLTREL]==DT_CREL\n  + -r: dump SHT_CREL sections\n  + --dyn-relocations: dump DT_CREL table\n* llvm-objcopy\n  + handle RelocationSection\n* llvm-objdump\n  + -r\n  + -dr\n* yaml2obj/obj2yaml\n* MCTargetOptions\n  + llvm-mc -crel\n  + llc -crel\n  + ld.lld -mllvm -crel for LTO\n\n---\n\nCREL is a compact relocation format for the ELF object file format.\n\nThis patch adds integrated assembler support (using the RELA form)\navailable with `llvm-mc -filetype=obj -crel a.s -o a.o`.\nA dependent patch will add `clang -c -Wa,--crel,--allow-experimental-crel`.\n\nAlso add llvm-readobj support (for both REL and RELA forms) to\nfacilitate testing the assembler. Additionally, yaml2obj gains support\nfor the RELA form to aid testing with llvm-readobj.\n\nWe temporarily assign the section type code 0x40000020 from the generic\nrange to `SHT_CREL`. We avoided using `SHT_LLVM_` or `SHT_GNU_` to\navoid code churn and maintain broader applicability for interested psABIs.\n\nLLVM will change the code and break compatibility. This is not an issue\nif all relocatable files using CREL are regenerated (aka no prebuilt\nrelocatable files).\n\nAlso add DT_CREL 38 to aid testing llvm-readobj for the REL form.\nWithout linker/dynamic loader concern, there is even less concern for\npeople unintentionally using this.\n\nLink: https://discourse.llvm.org/t/rfc-crel-a-compact-relocation-format-for-elf/77600","shortMessageHtmlLink":"DO NOT SUBMIT CREL prototype"}},{"before":"124c243de1da2b3cd3745206859e0e6893ae81be","after":"e983bbc3a98cac4ee4583c6ea3f07239eb128913","ref":"refs/heads/crel-mc","pushedAt":"2024-06-13T02:34:35.000Z","pushType":"force_push","commitsCount":0,"pusher":{"login":"MaskRay","name":"Fangrui Song","path":"/MaskRay","primaryAvatarUrl":"https://avatars.githubusercontent.com/u/416322?s=80&v=4"},"commit":{"message":"[MC,llvm-readobj,yaml2obj] Support CREL relocation format\n\nCREL is a compact relocation format for the ELF object file format.\n\nThis patch adds integrated assembler support (using the RELA form)\navailable with `llvm-mc -filetype=obj -crel a.s -o a.o`.\nA dependent patch will add `clang -c -Wa,--crel,--allow-experimental-crel`.\n\nAlso add llvm-readobj support (for both REL and RELA forms) to\nfacilitate testing the assembler. Additionally, yaml2obj gains support\nfor the RELA form to aid testing with llvm-readobj.\n\nWe temporarily assign the section type code 0x40000020 from the generic\nrange to `SHT_CREL`. We avoided using `SHT_LLVM_` or `SHT_GNU_` to\navoid code churn and maintain broader applicability for interested psABIs.\n\nLLVM will change the code and break compatibility. This is not an issue\nif all relocatable files using CREL are regenerated (aka no prebuilt\nrelocatable files).\n\nAlso add DT_CREL 38 to aid testing llvm-readobj for the REL form.\nWithout linker/dynamic loader concern, there is even less concern for\npeople unintentionally using this.\n\nLink: https://discourse.llvm.org/t/rfc-crel-a-compact-relocation-format-for-elf/77600\n\nPull Request: https://github.com/llvm/llvm-project/pull/91280","shortMessageHtmlLink":"[MC,llvm-readobj,yaml2obj] Support CREL relocation format"}},{"before":"d125e717df24b2d310d934cca5daf6589566a0d6","after":"78ee473784e5ef6f0b19ce4cb111fb6e4d23c6b2","ref":"refs/heads/main","pushedAt":"2024-06-13T02:34:33.000Z","pushType":"push","commitsCount":5,"pusher":{"login":"MaskRay","name":"Fangrui Song","path":"/MaskRay","primaryAvatarUrl":"https://avatars.githubusercontent.com/u/416322?s=80&v=4"},"commit":{"message":"[gn build] Port 2e1ad93961a3","shortMessageHtmlLink":"[gn build] Port <a class=\"commit-link\" data-hovercard-type=\"commit\" data-hovercard-url=\"https://github.com/MaskRay/llvm-project/commit/2e1ad93961a3f444659c5d02d800e3144acccdb4/hovercard\" href=\"https://github.com/MaskRay/llvm-project/commit/2e1ad93961a3f444659c5d02d800e3144acccdb4\"><tt>2e1ad93</tt></a>"}},{"before":"11937cb8d75aba4025ebff0c72dad96ce428be1c","after":"e508ee1da64e9d9cdaa5741b630c87888afb716f","ref":"refs/heads/mc-bundle-relax-all","pushedAt":"2024-06-13T01:06:37.000Z","pushType":"force_push","commitsCount":0,"pusher":{"login":"MaskRay","name":"Fangrui Song","path":"/MaskRay","primaryAvatarUrl":"https://avatars.githubusercontent.com/u/416322?s=80&v=4"},"commit":{"message":"[MC] Aligned bundling: remove special handling for RelaxAll\n\nWhen both aligned bundling and RelaxAll are enabled, bundle padding is\ndirectly written into fragments (https://reviews.llvm.org/D8072).\n(The original motivation was memory usage, which has been achieved from\ndifferent angles with recent assembler improvement).\n\nThe code presents challenges with the work to replace fragment\nrepresentation (e.g. #94950 #95077). This patch removes the special\nhandling. RelaxAll still works but the behavior seems slightly different\nas revealed by 2 changed tests. However, most `-mc-relax-all` tests are\nunchanged.\n\nRelaxAll used to be the default for clang -O0. This mode has significant\ncode size drawbacks and newer Clang doesn't use it (#90013).\n\n---\n\nflushPendingLabels: The FOffset parameter can be removed: pending labels\nwill be assigned to the incoming fragment at offset 0.\n\nPull Request: https://github.com/llvm/llvm-project/pull/95188","shortMessageHtmlLink":"[MC] Aligned bundling: remove special handling for RelaxAll"}}],"hasNextPage":true,"hasPreviousPage":false,"activityType":"all","actor":null,"timePeriod":"all","sort":"DESC","perPage":30,"cursor":"djE6ks8AAAAEa0o4UQA","startCursor":null,"endCursor":null}},"title":"Activity · MaskRay/llvm-project"}