Date: Thu, 6 Aug 2020 19:08:29 +0000 (UTC) From: Dimitry Andric <dim@FreeBSD.org> To: src-committers@freebsd.org, svn-src-projects@freebsd.org Subject: svn commit: r363976 - projects/clang1100-import/contrib/llvm-project/libunwind/src Message-ID: <202008061908.076J8TT2052593@repo.freebsd.org>
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Author: dim Date: Thu Aug 6 19:08:28 2020 New Revision: 363976 URL: https://svnweb.freebsd.org/changeset/base/363976 Log: Reapply r355803 (by mmel): Fix LLVM libunwnwind _Unwind_Backtrace symbol version for ARM. In original GNU libgcc, _Unwind_Backtrace is published with GCC_3.3 version for all architectures but ARM. For ARM should be publishes with GCC_4.3.0 version. This was originally omitted in r255095, fixed in r318024 and omitted aging in LLVM libunwind implementation in r354347. For ARM _Unwind_Backtrace should be published as default with GCC_4.3.0 version , (because this is right original version) and again as normal(not-default) with GCC_3.3 version (to maintain ABI compatibility compiled/linked with wrong pre r318024 libgcc) PR: 233664 Modified: projects/clang1100-import/contrib/llvm-project/libunwind/src/UnwindLevel1-gcc-ext.c Modified: projects/clang1100-import/contrib/llvm-project/libunwind/src/UnwindLevel1-gcc-ext.c ============================================================================== --- projects/clang1100-import/contrib/llvm-project/libunwind/src/UnwindLevel1-gcc-ext.c Thu Aug 6 19:05:59 2020 (r363975) +++ projects/clang1100-import/contrib/llvm-project/libunwind/src/UnwindLevel1-gcc-ext.c Thu Aug 6 19:08:28 2020 (r363976) @@ -181,6 +181,10 @@ _Unwind_Backtrace(_Unwind_Trace_Fn callback, void *ref } } } +#ifdef __arm__ +/* Preserve legacy libgcc (pre r318024) ARM ABI mistake */ +__sym_compat(_Unwind_Backtrace, _Unwind_Backtrace, GCC_3.3); +#endif /// Find DWARF unwind info for an address 'pc' in some function.
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