* Renames few tests which had extension objtxt to test
* created core directory that contains all the core tests

llvm-svn: 189720

This creates .init_array/.fini_array section for X86_64 ELF
targets and executes init/fini functions specified by the
-init/-fini options respectively.

llvm-svn: 189719

This adds an API to the LinkingContext for flavors to add Internal files
containing atoms that need to appear in the YAML output as well, when -emit-yaml
switch is used.

Flavors can add more internal files for other options that are needed.

llvm-svn: 189718

We added layout edges to the head atoms in grouped sections. That was wrong,
because the head atom needs to be followed by the other atoms in the *same*
section, not by the other section contents. With this patch, layout edges are
added from tail atom, which is the last atom in a section, to head atom.

llvm-svn: 189573

Because of a bug, the last atom of each section contained a garbage at the
end of its data. In most cases the garbage is harmless but it could have cause
SEGV.

llvm-svn: 189572

llvm-svn: 189505

llvm-svn: 189423

r189416 changed the order of command line options shown in help message,
so the test needs adjusting.

llvm-svn: 189417

Differential Revision: http://llvm-reviews.chandlerc.com/D1527

llvm-svn: 189318

llvm-svn: 189308

With this patch the entry symbol is treated as an undefined symbol, to force
the resolver to resolve the entry symbol.

Differential Revision: http://llvm-reviews.chandlerc.com/D1524

llvm-svn: 189307

This change processes fini_array section in addition to processing
init_array sections. This also makes functions registered at compile
time for initialization and finalization to be run during execution

llvm-svn: 189196

in order to match link.exe's behaviour.

Patch by Ron Ofir.

llvm-svn: 189159

The debug flag being checked for seems to be controlled by whether the
build is asserts/non-asserts rather than debug/non-debug. Mostly these
correlate, but not necessarily.

As far as I can tell with various combinations of debug/assetions this
change makes no difference on autotools builds, but fixes a check-all
failure with CMake.

llvm-svn: 189147

There may be relocations that may be pointing to the section
even if the section sizes are 0. We shouldnot ignore them
for that regard.

llvm-svn: 189139

typeTLV content type is used by Darwin to represent thread local
storage. A new contentType has to be made to represent ELF
thread local storage data. These have been set to

- typeThreadZeroFill (represents TBSS storage)
- typeThreadData     (represents TDATA storage)

llvm-svn: 189137

BSS atoms dont take any file space in the Input file. They are associated
with a contentType(typeZeroFill). Similiar zero fill types also exist which
have the same meaning in terms of occupying file space in the Input.

These atoms have to be handled seperately when writing to the
lld's intermediate file or the lld test infrastructure.

Also adds a test.

llvm-svn: 189136

llvm-svn: 188982

llvm-svn: 188981

llvm-svn: 188958

This is a temporary measure because the semantics of the common symbol is
actually more compilcated than the simple mergeable symbol.

llvm-svn: 188235

Patch by Ron Ofir.

llvm-svn: 188187

The import name is not always the same as the symbol name. If the name/type
field in the import header is NOPREFIX or UNDECORATE, we need to strip some
characters from symbol to get its import name.

The Microsoft PE/COFF spec is vague if symbol contains more than two
consecutive characters to be stripped. We used to strip all characters,
but it doesn't seem right as we couldn't link against the system library
because of this name mangling. Looks like we shouldn't strip more than one
character.

llvm-svn: 188154

llvm-svn: 188093

__ImageBase is a symbol having 4 byte integer equal to the image base address
of the resultant executable. The linker is expected to create the symbol as if
it were read from a file.

In order to emit the symbol contents only when the symbol is actually
referenced, we created a pseudo library file to wrap the linker generated
symbol. The library file member is emitted to the output only when the member
is actually referenced, which is suitable for our purpose.

llvm-svn: 188052

The COMDAT section is a section with a special attribute to tell the linker
whether the symbols in the section are allowed to be merged or not. This patch
add a function to interpret the COMDAT data and set "merge" attribute to the
atoms accordingly.

LLD supports multiple policies to merge atoms; atoms can be merged by name or
by content. COFF supports them, and in addition to that, it supports
choose-the-largest-atom policy, which LLD currently does not support. I simply
mapped it to merge-by-name attribute for now, but we eventually have to support
that policy in the core linker.

llvm-svn: 188025

llvm-svn: 188021

llvm-svn: 188011

Summary:
The .drectve section contains linker command line options, and the linker is
expected to interpret them as if they were given via the command line. In this
patch, the command line parser in the driver is called from the object file
reader to parse the string.

I think this patch is important, because this is the first step towards mutable
TargetInfo. We had a discussion about that on llvm-commits mailing list before.
I haven't removed "const" from the function signature yet. Instead, I just use
cast to remove "const". This is a temporary aid for an experiment. If we don't
see any issue with this mutable TargetInfo appraoch, I'll change the function
signature, and rename the class LinkerContext from TargetInfo.

Reviewers: kledzik

CC: llvm-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D1246

llvm-svn: 187677

Patch by Ron Ofir.

llvm-svn: 187664

llvm-svn: 187645

llvm-svn: 187460

This patch removes hacky mangle() function, which strips all decorations
uncondtitionally. LLD now interprets Import Name/Type field in the import
library properly as described in the Microsoft PE/COFF Spec.

llvm-svn: 187388

llvm-svn: 187381

Some sections, such as with IMAGE_SCN_LNK_REMOVE attribute, is skipped
in the first pass. Such sections need to be skipped in the latter passes.

llvm-svn: 187281

Based on Ron Ofir's patch.

llvm-svn: 187221

llvm-svn: 187170

llvm-svn: 187165

llvm-svn: 187100

LLD still accepts both Unix and Windows style options when it's run as
link.exe. This patch does not change functionality.

llvm-svn: 187086