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SHF_X86_64_LARGE flags.
GNU uses `l` for SHF_X86_64_LARGE and `y` for SHF_ARM_PURECODE.
Lets follow.
To do this I had to refactor and refine how we print the help flags description.
It was too generic and inconsistent with GNU readelf.
Differential revision: https://reviews.llvm.org/D71464
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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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cleanup flags testing.
This:
1) Adds a test for testing all section flags (`section-flags.test`).
2) Renames `sec-flags.test`->`section-arch-flags.test`
and performs a clean up.
3) Removes `compression.zlib.style.elf-x86-64` binary and a test case
for SHF_COMPRESSED flag, because them are now excessive.
4) Adds missing MIPS flags and a test for SHF_ARM_PURECODE.
Differential revision: https://reviews.llvm.org/D71333
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