Add SharedLibraryFile and ArchiveLibraryFile subclasses of File.

Add command line options to lld-core to set various ResolverOptions settings
and added lots of test cases to verify the options work.

llvm-svn: 155183

class.  Change Resolver to no longer use Platform.  Core linking
now issues errors directly.  We need to factor that out later.

Rework how Darwin executable writer finds "main" atom.  It now
adds to core linking an Atom  which has a Reference to "main".  

llvm-svn: 155060

llvm-svn: 154302

llvm-svn: 154301

llvm-svn: 154277

llvm-svn: 154274

llvm-svn: 154246

a hello world executable from atoms.  There is still much to be flushed out.
Added one test case, test/darwin/hello-world.objtxt, which exercises the
darwin platform.

Added -platform option to lld-core tool to dynamically select platform.

llvm-svn: 154242

llvm-svn: 153964

types into the lld namespace.

llvm-svn: 153963

llvm-svn: 153912

llvm-svn: 153677

llvm-svn: 153620

Also fix some Platform.h includes that somehow got missed last time.

llvm-svn: 153590

llvm-svn: 152874

llvm-svn: 152565

llvm-svn: 152389

llvm-svn: 152388

llvm-svn: 152387

llvm-svn: 152386

Add first linker pass (StubsPass) which looks for calls to shared library
symbols and replaces them with calls to a StubAtom.  On ELF system, a "stub"
is a PLT entry.  Added a simple test case.

Pass a Platform object to YAML reader and writer for converting fixup kinds 
between names and values.

Change output of Resolver to be a File object instead of a vector of Atoms.
Thus, passes operate on a File instead of just Atoms.

Rework how to walk through a File's Atoms. Now iterator based instead of 
a method that visits each atom.  

llvm-svn: 152269

shared library) and AbsoluteAtoms (proxy atoms for absolute address (e.g. ROM)).
Redesign weak importing as can-be-null-at-runtime and can-be-null-at-build-time.
Add lots of test cases for all the above.

llvm-svn: 151204

llvm-svn: 150547

llvm-svn: 150539

llvm-svn: 149962

llvm-svn: 149432

llvm-svn: 149430

llvm-svn: 149429

behaivior because it indexes past the end of _contentPool.

llvm-svn: 149427

llvm-svn: 149426

First chunk of native object file reader/writer.  The lld-core tool now reads YAML file, links, writes that out as native object format, then reads that native file, then writes the YAML to stdout.  Thus the test suite tests both YAML reading/writing as well as native object file reading/writing.

llvm-svn: 148256

A couple of big refactorings: 1) Move most attributes of Atom down to DefinedAtom, so only atoms representing definitions need to implement them. 2) Remove definitionTentative, definitionWeak, mergeDuplicates, and autoHide.  Replace with merge and interposable attributes. 3) Make all methods on Atom be virtual so that future object file readers can lazily generated attributes

llvm-svn: 147903

llvm-svn: 147799

llvm-svn: 147571

llvm-svn: 147130

llvm-svn: 147105

llvm-svn: 146958

llvm-svn: 146931

llvm-svn: 146844