Date: Sun, 2 Jan 2022 12:02:32 GMT From: Dimitry Andric <dim@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 802ff7fcee24 - stable/13 - Avoid emitting popcnt in libclang_rt.fuzzer*.a if unsupported Message-ID: <202201021202.202C2Woe097926@gitrepo.freebsd.org>
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The branch stable/13 has been updated by dim: URL: https://cgit.FreeBSD.org/src/commit/?id=802ff7fcee24cb224ea430ac45bece8f8743791f commit 802ff7fcee24cb224ea430ac45bece8f8743791f Author: Dimitry Andric <dim@FreeBSD.org> AuthorDate: 2021-12-30 09:53:25 +0000 Commit: Dimitry Andric <dim@FreeBSD.org> CommitDate: 2022-01-02 12:02:19 +0000 Avoid emitting popcnt in libclang_rt.fuzzer*.a if unsupported Since popcnt is only supported by CPUTYPE=nehalem and later, ensure that this instruction is only emitted when appropriate. Otherwise, programs using the library can abort with SIGILL. See also: https://github.com/llvm/llvm-project/issues/52893 PR: 258156 Reported by: Eric Rucker <bhtooefr@bhtooefr.org> MFC after: 3 days (cherry picked from commit 133180557479cd9676758e6f3f93a9d3e1c6b532) --- contrib/llvm-project/compiler-rt/lib/fuzzer/FuzzerPlatform.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/contrib/llvm-project/compiler-rt/lib/fuzzer/FuzzerPlatform.h b/contrib/llvm-project/compiler-rt/lib/fuzzer/FuzzerPlatform.h index 1602e6789500..65e77ded8e82 100644 --- a/contrib/llvm-project/compiler-rt/lib/fuzzer/FuzzerPlatform.h +++ b/contrib/llvm-project/compiler-rt/lib/fuzzer/FuzzerPlatform.h @@ -87,7 +87,7 @@ (LIBFUZZER_APPLE || LIBFUZZER_LINUX || LIBFUZZER_NETBSD || \ LIBFUZZER_FREEBSD || LIBFUZZER_EMSCRIPTEN) -#ifdef __x86_64 +#if defined(__x86_64) && defined(__POPCNT__) #if __has_attribute(target) #define ATTRIBUTE_TARGET_POPCNT __attribute__((target("popcnt"))) #else
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