George Rimar a1370877d7 [Object/llvm-readelf/llvm-readobj] - Improve error reporting when e_shstrndx is broken. ...

When e_shstrndx is broken, it is impossible to get a section name.
In this patch I improved the error message we show and 
added tests for Object and for llvm-readelf/llvm-readobj

Message was changed in two places:
1) llvm-readelf/llvm-readobj previously used a code from Object/ELF.h,
now they have a modified version of it (it has less checks and allows
dumping broken things).
2) Code in Object/ELF.h is still used for generic cases.

Differential revision: https://reviews.llvm.org/D64714

llvm-svn: 366203

2019-07-16 11:07:30 +00:00

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