This is the first step in how I plan to get mach-o object files support into 
lld. We need to be able to test the mach-o Reader and Write on systems without 
a mach-o tools. Therefore, we want to support a textual way (YAML) to represent 
mach-o files.

MachONormalizedFile.h defines an in-memory abstraction of the content of mach-o  
files. The in-memory data structures are always native endianess and always
use 64-bit sizes. That internal data structure can then be converted to or
from three different formats: 1) yaml (text) encoded mach-o, 2) binary mach-o
files, 3) lld Atoms.

This patch defines the internal model and uses YAML I/O to implement the 
conversion to and from the model to yaml. The next patch will implement
the conversion from normalized to binary mach-o.

This patch includes unit tests to validate the yaml conversion APIs.

llvm-svn: 192147

Summary: Rename lld:*_error::_ -> lld:*_error::ErrorCode.

Reviewers: shankarke

CC: llvm-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D1851

llvm-svn: 192138

This field would eventually be used.

llvm-svn: 192084

llvm-svn: 192083

Fix adding a missed file in the previous commit.

llvm-svn: 192082

Changes :-

a) Functionality in InputGraph to insert Input elements at any position
b) Functionality in the Resolver to use nextFile
c) Move the functionality of assigning file ordinals to InputGraph
d) Changes all inputs to MemoryBuffers
e) Remove LinkerInput, InputFiles, ReaderArchive

llvm-svn: 192081

llvm-svn: 191924

llvm-svn: 191867

Found this with asan. Code assumes that find doesn't return end, thus if
both atoms didn't have followon roots it would still compare their positions.

llvm-svn: 191865

llvm-svn: 191594

llvm-svn: 191583

Stop using some locally defined mach-o constants.

llvm-svn: 191581

llvm-svn: 191580

This will eventually need to be refactored to better handle COPY relocations,
as other relocations can also generate them. I'm not yet sure the exact
circumstances in which they are needed yet.

llvm-svn: 191567

llvm-svn: 191566

This reverts r191469 because the original patch this one depends on (r191472)
was reverted.

llvm-svn: 191479

llvm-svn: 191475

llvm-svn: 191469

llvm-svn: 191467

llvm-svn: 191466

llvm-svn: 191403

This patch inverts the return value of these functions, so that they return
"true" on success and "false" on failure. The meaning of boolean return value
was mixed in LLD; for example, InputGraph::validate() returns true on success.
With this patch they'll become consistent.

CC: llvm-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D1748

llvm-svn: 191341

llvm-svn: 191320

llvm-svn: 191317

llvm-svn: 191276

/PDBALTPATH:<path> is an option to embed a different path for the PDB file to
the binary than the actual PDB file location. Because we don't support PDB
file, we'll just ignore the option for now.

llvm-svn: 191273

llvm-svn: 191272

llvm-svn: 191271

llvm-svn: 191270

llvm-svn: 191269

llvm-svn: 191268

llvm-svn: 191259

llvm-svn: 191254

We used to support both Windows and Unix style command line options. In Windows
style, an option and its value are separated by ":" (colon). In Unix, separator
is a space. Accepting both styles were convenient, but we can no longer allow
Unix style because I found that can be ambiguous.

For example, /nodefaultlib option takes an optional argument. In Windows style
it's going to be something like "/nodefaultlib:foo". There's no ambiguity what
"foo" means. However, if the option is "/nodefaultlib foo", "foo" can be
interpreted either an optional argument for "/nodefaultlib" or an input file
"foo.obj". We should just stop accepting the non-standard command line style.

llvm-svn: 191247

These options are to enable DLL delay loading. If enabled, DLL is loaded
at run time by a helper routine when a function in the DLL is actually called
for the first time, instead of making the Windows loader to load all DLLs at
startup time. This should shorten startup delay if an executable have many
imported symbols.

The linker needs to create a "delayed import table" and link delayimp.lib in
which helper functions are defined to support the feature.

For now, we just ignore the options, so that the linker does not complain when
it sees these options. We want to support them in the future.

llvm-svn: 191232

llvm-svn: 191229

llvm-svn: 191228

llvm-svn: 191227

llvm-svn: 191224

llvm-svn: 191223