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Author SHA1 Message Date
Fangrui Song 3ab0f53ef3 [DebugInfo] Respect relocations when decoding DW_EH_PE_sdata4 & DW_EH_PE_sdata8 and support R_ARM_REL32 
The addresses in llvm-dwarfdump --eh-frame output for object files are closer to readelf -wf output now.
 2020-07-18 09:00:50 -07:00
Fangrui Song b922004ea2 [RelocationResolver] Support R_PPC_REL32 & R_PPC64_REL{32,64} 
This suppresses `failed to compute relocation: R_PPC_REL32, Invalid data was encountered while parsing the file`
and its 64-bit variants when running llvm-dwarfdump on a PowerPC object file with .eh_frame

Unfortunately it is difficult to test the computation:
DWARFDataExtractor::getEncodedPointer does not use the relocated value
and even if it does, we need to teach llvm-dwarfdump --eh-frame to do
some linker job to report a reasonable address.
 2020-07-17 23:29:50 -07:00