Commit Graph

203 Commits

Author SHA1 Message Date
Rui Ueyama 3d3e6fba6e COFF: Add /machine option.
llvm-svn: 238564
2015-05-29 16:06:00 +00:00
Rui Ueyama c9bfe32010 COFF: Fill imort table HintName field.
Currently we set the field to zero, but as per the spec, we should
set numbers we read from import library files. The loader uses the
values as starting offsets for binary search when looking up imported
symbols from DLL.

llvm-svn: 238562
2015-05-29 15:45:35 +00:00
Rui Ueyama 411c636081 COFF: Add a new PE/COFF port.
This is an initial patch for a section-based COFF linker.

The patch has 2300 lines of code including comments and blank lines.
Before diving into details, you want to start from reading README
because it should give you an overview of the design.

All important things are written in the README file, so I write
summary here.

- The linker is already able to self-link on Windows.

- It's significantly faster than the existing implementation.
  The existing one takes 5 seconds to link LLD on my machine,
  while the new one only takes 1.2 seconds, even though the new
  one is not multi-threaded yet. (And a proof-of-concept multi-
  threaded version was able to link it in 0.5 seconds.)

- It uses much less memory (250MB vs. 2GB virtual memory space
  to self-host).

- IMHO the new code is much simpler and easier to read than
  the existing PE/COFF port.

http://reviews.llvm.org/D10036

llvm-svn: 238458
2015-05-28 19:09:30 +00:00