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Our logic that dumped the flags was buggy.
For LLVM style it dumped SHF_MASKPROC/SHF_MASKOS named constants, though
they are not flags, but masks.
For GNU style it was just very inconsistent with GNU which has logic
that is not straightforward. Imagine we have sh_flags == 0x90000000.
SHF_EXCLUDE ("E") has a value of 0x80000000 and SHF_MASKPROC is 0xf0000000.
GNU readelf will not print "E" or "Ep" in this case, but will print just
"p". It only will print "E" when no other processor flag is set.
I had to investigate the GNU source to find the algorithm and now our logic should
match it.
Differential revision: https://reviews.llvm.org/D71462
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Summary:
As pointed out in D53667, our use of hyphens in flags can be inconsistent, mixing `-` with `--`. This change makes all long style flags use `--`.
Automatically changed via:
```
find test/tools/llvm-objcopy/ELF -type f | xargs sed -i 's/ -\([a-zA-Z]\{3\}\)/ --\1/g'
```
Two false positives were manually fixed/reverted.
Reviewers: jhenderson, espindola, alexshap
Reviewed By: jhenderson
Subscribers: emaste, javed.absar, arichardson, fedor.sergeev, jakehehrlich, llvm-commits
Differential Revision: https://reviews.llvm.org/D56513
llvm-svn: 350944
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