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This patch tries to resolve problems faced in D68943
and uses some of the code written by Konrad Wilhelm Kleine
in that patch.
Previously, yaml2obj tool always created a .symtab section.
This patch changes that. With it we only create it when
have a "Symbols:" tag in the YAML document or when
we need to create it because it is used by another section(s).
obj2yaml follows the new behavior and does not print "Symbols:"
anymore when there is no symbol table.
Differential revision: https://reviews.llvm.org/D69041
llvm-svn: 375361
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Linkers (ld.bfd/gold/lld) place the section header table at the very
end. This allows tools to strip it, which is optional in executable/shared objects.
In addition, if we add or section, the size of the section header table
will change. Placing the section header table in the end keeps section
offsets unchanged.
yaml2obj currently places the section header table immediately after the
program header. Follow what linkers do to make offset updating easier.
Reviewed By: grimar
Differential Revision: https://reviews.llvm.org/D67221
llvm-svn: 371074
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The errors coming from ELF.h are usually not very
useful because they are uninformative. This patch is a
first step to improve the situation.
I tested this patch with a run of check-llvm and found
that few messages are untested. In this patch, I did not
add more tests but marked all such cases with a "TODO" comment.
For all tested messages I extended the error text to
provide more details (see test cases changed).
Differential revision: https://reviews.llvm.org/D64014
llvm-svn: 365183
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This patch adds a number of tests to test various cases not covered by
existing tests. All of them work correctly, with no need to change
llvm-objcopy itself, although some do indicate possible areas for
improvement.
Reviewed by: MaskRay
Differential Revision: https://reviews.llvm.org/D61727
llvm-svn: 360422
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