in order to match link.exe's behaviour.

Patch by Ron Ofir.

llvm-svn: 189159

llvm-svn: 189157

Patch by Ron Ofir.

llvm-svn: 189151

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

There is no change in functionality, this uses the defined way to access
the relocation section that belongs to a particular section.

llvm-svn: 189138

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

Previously, the CMake build would look for llvm-tblgen to determine
if a directory is an LLVM build or install directory. Since we don't
want to include llvm-tblgen in the install, look for llvm-config instead,
and use that to find llvm-tblgen.

(This is the lld equivalent of Clang r189127.)

llvm-svn: 189128

llvm-svn: 189035

llvm-svn: 189025

llvm-svn: 189023

llvm-svn: 188988

llvm-svn: 188983

llvm-svn: 188982

llvm-svn: 188981

llvm-svn: 188978

llvm-svn: 188965

llvm-svn: 188963

llvm-svn: 188961

llvm-svn: 188958

This used to be handled automagically by the option parsing library,
but after LLVM r188314, we should handle it ourselves.

No functionality change, but adds a test.

llvm-svn: 188318

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: 188152

llvm-svn: 188150

llvm-svn: 188093

llvm-svn: 188090

__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

llvm-svn: 188049

llvm-svn: 188046

llvm-svn: 188045

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

Also change some local variable names: "ti" -> "context" and
"_targetInfo" -> "_context".

Differential Revision: http://llvm-reviews.chandlerc.com/D1301

llvm-svn: 187823

llvm-svn: 187690

llvm-svn: 187688

Thanks to Hans' patch (r187675), OptTable now handles "--", so we don't
need this code in LLD.

llvm-svn: 187683