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GNU: do not read the FDE count if omitted 

If there is no binary search table computed, the FDECount encoding is
DW_EH_PE_omit.  Do not attempt to read the FDECount in such a situation
as we will read an incorrect value.  binutils only writes out the
FDECount if the encoding is not DW_EH_PE_omit.

llvm-svn: 316224
This commit is contained in:
Saleem Abdulrasool 2017-10-20 18:47:35 +00:00
parent bb94161fb7
commit f7596ece76
1 changed files with 3 additions and 1 deletions
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4
libunwind/src/EHHeaderParser.hpp
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@ -67,7 +67,9 @@ void EHHeaderParser<A>::decodeEHHdr(A &addressSpace, pint_t ehHdrStart,
ehHdrInfo.eh_frame_ptr =
addressSpace.getEncodedP(p, ehHdrEnd, eh_frame_ptr_enc, ehHdrStart);
ehHdrInfo.fde_count =
addressSpace.getEncodedP(p, ehHdrEnd, fde_count_enc, ehHdrStart);
fde_count_enc == DW_EH_PE_omit
? 0
: addressSpace.getEncodedP(p, ehHdrEnd, fde_count_enc, ehHdrStart);
ehHdrInfo.table = p;
}