git: 3d9d2c27d58a - stable/13 - Add ELFCOMPRESS_ZSTD ELF compression constant
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Date: Thu, 04 Aug 2022 00:35:56 UTC
The branch stable/13 has been updated by emaste: URL: https://cgit.FreeBSD.org/src/commit/?id=3d9d2c27d58a92363713ab3a7822da29b1dcecb9 commit 3d9d2c27d58a92363713ab3a7822da29b1dcecb9 Author: Ed Maste <emaste@FreeBSD.org> AuthorDate: 2022-06-28 13:06:12 +0000 Commit: Ed Maste <emaste@FreeBSD.org> CommitDate: 2022-08-04 00:35:42 +0000 Add ELFCOMPRESS_ZSTD ELF compression constant ELFCOMPRESS_ZSTD indicates that an ELF section is compressed with zstd. It is the second compression type, after the existing ELFCOMPRESS_ZLIB. Zstd generally provides a compelling tradeoff of speed and compression (other algorithms may compress slightly better but take a lot longer, or run faster but do not compress nearly as well). See https://groups.google.com/g/generic-abi/c/satyPkuMisk for details. ELFCOMPRESS_ZSTD will be supported in a future Clang/LLVM update. ELF Tool Chain tools also need updating. Reviewed by: Fangrui Song MFC after: 1 week Sponsored by: The FreeBSD Foundation (cherry picked from commit 05b6744c446c2d274738fbb27a3ded1bf9f9f1d1) --- share/man/man5/elf.5 | 6 +++++- sys/sys/elf_common.h | 1 + 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/share/man/man5/elf.5 b/share/man/man5/elf.5 index 81376e7e6bb9..95bc183a1f91 100644 --- a/share/man/man5/elf.5 +++ b/share/man/man5/elf.5 @@ -24,7 +24,7 @@ .\" .\" $FreeBSD$ .\" -.Dd November 27, 2021 +.Dd July 25, 2022 .Dt ELF 5 .Os .Sh NAME @@ -1103,6 +1103,10 @@ A value of .Dv ELFCOMPRESS_ZLIB indicates that the data is compressed using .Xr zlib 3 . +A value of +.Dv ELFCOMPRESS_ZSTD +indicates that the data is compressed using +Zstandard. .It Dv ch_size The size, in bytes, of the uncompressed section data. This corresponds to the diff --git a/sys/sys/elf_common.h b/sys/sys/elf_common.h index d4508f0750a8..5b7a290fd761 100644 --- a/sys/sys/elf_common.h +++ b/sys/sys/elf_common.h @@ -943,6 +943,7 @@ typedef struct { /* Values for ch_type (compressed section headers). */ #define ELFCOMPRESS_ZLIB 1 /* ZLIB/DEFLATE */ +#define ELFCOMPRESS_ZSTD 2 /* Zstandard */ #define ELFCOMPRESS_LOOS 0x60000000 /* OS-specific */ #define ELFCOMPRESS_HIOS 0x6fffffff #define ELFCOMPRESS_LOPROC 0x70000000 /* Processor-specific */