llvm-svn: 191218

llvm-svn: 191217

Summary: This patch changes WritePECOFF to calculate the value of the SizeOfHeaders PE header field instead of just using 512.

Reviewers: rui314, ruiu

Reviewed By: ruiu

CC: llvm-commits, ruiu

Differential Revision: http://llvm-reviews.chandlerc.com/D1708

llvm-svn: 191212

llvm-svn: 191207

This adds an option --output-filetype that can be set to either
YAML/Native(case insensitive). The linker would create the outputs
associated with the type specified by the user.

Changes all the tests to use the new option.

llvm-svn: 191183

llvm-svn: 191079

GNU LD driver only understood no_such_file_or_directory error and was showing
just "Unknown Error" for any other type of error. With this patch, the driver
now prints file name and error message string by default.

llvm-svn: 191070

llvm-svn: 191069

/incremental is an option to enable incremental linking. We will eventually
want to implement the feature for better performance, but in the meantime,
we want to just ignore the option so that the linker does not output unknown
option error when it sees /incremental option.

llvm-svn: 191063

llvm-svn: 191061

If a subclass does not override the member function, the superclass's method
takes care of string conversion of "file not found" error. This is a reasonable
default behavior. Subclasses are still able to override to customize error
messages.

llvm-svn: 191058

llvm-svn: 191054

/errorReport is a command line option to let the linker to report internal
linker error information to Microsoft. For LLD that option doesn't make any
sense, so it just ignores the option.

llvm-svn: 191044

Cleanup structure members that are not being used.

Also clang-format it.

llvm-svn: 191038

llvm-svn: 191033

This also makes it support debugging executables built with lld.

Initial patch done by Bigcheese. This is only a revised patch to
have the functionality in the Writer.

llvm-svn: 191032

llvm-svn: 190986

Test is coming after submitting http://llvm-reviews.chandlerc.com/D1719.

llvm-svn: 190983

Base relocation block should be aligned on a 32-bit boundary. While the PECOFF
spec mentions only aligning the blocks, and not padding them, link.exe seems
to add an extra IMAGE_REL_I386_ABSOLUTE entry (just a zeroed WORD) in order to
pad the blocks.

Patch by Ron Ofir.

llvm-svn: 190951

llvm-svn: 190949

llvm-svn: 190903

This sets the sectionChoice property for DefinedAtoms. The output section name
is derived by the property of the atom. This also decreases native file size.

Adds a test.

llvm-svn: 190840

This patch changes lld to go through all sections while calculating the size
for SizeOfCode, SizeOfInitializedData and SizeOfUninitializedData fields in the
PE header, instead of using only a small set of hard-coded sections.

This only really changes SizeOfInitializedData which didn't include .reloc
section before this patch.

Patch by Ron Ofir.

llvm-svn: 190799

This patch sets the IMAGE_SCN_MEM_DISCARDABLE characteristic to the base
relocations section in order to match MS PECOFF specification.

Patch by Ron Ofir.

llvm-svn: 190798

llvm-svn: 190772

llvm-svn: 190758

llvm-svn: 190753

NetBSD need it.

llvm-svn: 190752

This reverts r189881 because that patch caused dangling StringRefs.

llvm-svn: 190725

There was a bug that if a section has an alignment requirement and there are
multiple symbols at offset 0 in the section, only the last atom at offset 0
would be aligned properly. That bug would move only the last symbol to an
alignment boundary, leaving other symbols unaligned, although they should be at
the same location. That caused a mysterious SEGV error of the resultant
executable.

With this patch, we manage all symbols at the same location properly, rather
than keeping the last one.

llvm-svn: 190724

Alignment(1) does not mean that the atom should be aligned on a 1 byte
boundary but on a 2^1 boundary. So, atoms without any specific alignment
requirements should have Alignment(0).

llvm-svn: 190723

llvm-svn: 190714

This handles multiple weak symbols which appear back to back. This fix is needed
which otherwise will lead to symbols getting initialized to arbitrary values.

There was a constructor/destructor test that really triggered this to be fixed
on X86_64.

Adds a test.

llvm-svn: 190658

Used the fallback mechanism to implement COFF weak external symbols.

llvm-svn: 190633

llvm-svn: 190629

llvm-svn: 190628

So that we can determine what the target architecture is. Adding this
field does not mean that we are going to support non-i386 architectures
soon; there are many things to do to support them, and I'm focusing on
i386 now. But this is the first step toward multi architecture support.

llvm-svn: 190627

In COFF, an undefined symbol can have up to one alternative name. If a symbol
is resolved by its regular name, then it's linked normally. If a symbol is not
found in any input files, all references to the regular name are resolved using
the alternative name. If the alternative name is not found, it's a link error.
This mechanism is called "weak externals".

To support this mechanism, I added a new member function fallback() to undefined
atom. If an undefined atom has the second name, fallback() returns a new undefined
atom that should be used instead of the original one to resolve undefines. If it
does not have the second name, the function returns nullptr.

Differential Revision: http://llvm-reviews.chandlerc.com/D1550

llvm-svn: 190625

llvm-svn: 190619

llvm-svn: 190612