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arm: libgcc_s: Fix ABI breakage introduced in r354347

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Provide the symbol version for llvm-libunwind's _Unwind_Backtrace that libgcc
has historically provided on arm, in addition to the (default) standard version
used on all other arch.

Reported by:	mmel
This commit is contained in:
Conrad Meyer 2019-12-12 04:44:09 +00:00
parent 7789ab32b3
commit dfdd76fc34
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=355645
1 changed files with 4 additions and 0 deletions
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4
contrib/libunwind/src/UnwindLevel1-gcc-ext.c
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@ -181,6 +181,10 @@ _Unwind_Backtrace(_Unwind_Trace_Fn callback, void *ref) {
}
}
}
#ifdef __arm__
/* Preserve legacy libgcc ARM ABI mistake. */
__sym_compat(_Unwind_Backtrace, _Unwind_Backtrace, GCC_4.3.0);
#endif
/// Find DWARF unwind info for an address 'pc' in some function.