Emit note sections if the input contains a note section.

Also emit a note segment.

llvm-svn: 189896

Before this patch, name of driver implementation is not consistent with its
option table file. Specifically, LDOptions has a different prefix than
GnuLdDriver.

This patch renames option files, so that the option files have the same prefix
as the corresponding driver files.

Differential Revision: http://llvm-reviews.chandlerc.com/D1591

llvm-svn: 189895

llvm-svn: 189891

llvm-svn: 189890

Also add a llvm_unreachable call so that the linker will trip on unhandled
inputElement types.

llvm-svn: 189887

llvm-svn: 189883

llvm-svn: 189881

llvm-svn: 189877

llvm-svn: 189876

llvm-svn: 189875

llvm-svn: 189874

llvm-svn: 189873

This adds init/fini support for Hexagon.

llvm-svn: 189872

This changes the interface of createLinkerInput to use ErrorOr, so that
errors from the linker can be captured.

Also adds a convenience function for error strings to be returned from
file nodes.

llvm-svn: 189871

llvm-svn: 189865

llvm-svn: 189847

llvm-svn: 189826

dependencies should remain weak, not get promoted to undef or dropped.

llvm-svn: 189793

llvm-svn: 189778

Differential Revision: http://llvm-reviews.chandlerc.com/D1577

llvm-svn: 189777

Also added a test to verify that entry symbol is not stripped even if
dead stripping is enabled.

llvm-svn: 189776

llvm-svn: 189775

llvm-svn: 189774

llvm-svn: 189771

llvm-svn: 189752

llvm-svn: 189751

* 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

llvm-svn: 189714

llvm-svn: 189713

llvm-svn: 189708

llvm-svn: 189614

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: 189570

We were creating undefined atoms for common symbols by mistake. That did not
lead to a link failure, for undefined atoms would be resolved by common symbols
in the same file, but that's a waste of resource.

llvm-svn: 189534

We scanned the symbol table twice; first to gather all regular symbols, and
second to process aux symbols. That's a bit inefficient and complicated. We
can instead cache aux symbols in the first pass, to eliminate the need of the
second pass.

llvm-svn: 189525

llvm-svn: 189505

llvm-svn: 189423