Commit Graph

370 Commits

Author SHA1 Message Date
Rui Ueyama 360bace8eb COFF: Add /alternatename option.
Previously, this feature was implemented using a special type of
undefined symbol, in addition to an intricate way to make the resolver
read a virtual file containing that renaming symbols.

Now the feature is directly handled by the symbol table.
The symbol table has a function, rename(), to rename symbols, whose
definition is 4 lines long. Symbol renaming is naturally modeled using
Symbol and SymbolBody.

llvm-svn: 238696
2015-05-31 22:31:31 +00:00
Rui Ueyama 711cd2d7c8 COFF: Detect file type by file magic.
llvm-svn: 238691
2015-05-31 21:17:10 +00:00
Rui Ueyama d7c2f5847a COFF: Make the Driver own all MemoryBuffers. NFC.
Previously, a MemoryBuffer of a file was owned by each InputFile object.
This patch makes the Driver own all of them. InputFiles now have only
MemoryBufferRefs. This change simplifies ownership managment
(particularly for ObjectFile -- the object owned a MemoryBuffer only when
it's not created from an archive file, because in that case a parent
archive file owned the entire buffer. Now it owns nothing unconditionally.)

llvm-svn: 238690
2015-05-31 21:04:56 +00:00
Rui Ueyama f4784cce54 COFF: /libpath should not take precedence over the current directory.
llvm-svn: 238683
2015-05-31 20:20:37 +00:00
Rui Ueyama 0613747e1a COFF: Add /libpath option.
llvm-svn: 238682
2015-05-31 20:10:11 +00:00
Rui Ueyama e042fa9aa5 COFF: Add /include option.
It does not involve notions of virtual archives or virtual files,
nor store a list of undefined symbols somewhere else to consume them later.
We did that before. In this patch, undefined symbols are just added to
the symbol table, which now can be done in very few lines of code.

llvm-svn: 238681
2015-05-31 19:55:40 +00:00
Rui Ueyama d21b00bd7c COFF: Add /nodefaultlib option.
llvm-svn: 238679
2015-05-31 19:17:14 +00:00
Rui Ueyama 54b71daec4 COFF: Refactor functions to find files from search paths.
llvm-svn: 238678
2015-05-31 19:17:12 +00:00
Rui Ueyama a9cbbf885f COFF: Create LinkerDriver class.
Previously the main linker routine is just a non-member function.
We store some context information to the Config object.
This patch makes it belong to Driver.

llvm-svn: 238677
2015-05-31 19:17:09 +00:00
Rui Ueyama 3ee0fe4c2c COFF: Implement subsystem inference.
llvm-svn: 238668
2015-05-31 03:55:46 +00:00
Rui Ueyama 5cff68599d COFF: Infer entry symbol name if /entry is not given.
`main` is not the only main function in Windows. You can choose one
from these four -- {w,}{WinMain,main}. There are four different entry
point functions for them, {w,}{WinMain,main}CRTStartup, respectively.
The linker needs to choose the right one depending on which `main`
function is defined.

llvm-svn: 238667
2015-05-31 03:34:08 +00:00
Rui Ueyama 15cc47ee81 COFF: Add /subsystem option.
llvm-svn: 238571
2015-05-29 16:34:31 +00:00
Rui Ueyama b9dcdb5fc9 COFF: Add /version option.
llvm-svn: 238570
2015-05-29 16:28:29 +00:00
Rui Ueyama c377e9aefe COFF: Add /heap option.
llvm-svn: 238569
2015-05-29 16:23:40 +00:00
Rui Ueyama b41b7e5a69 Add /stack option.
llvm-svn: 238568
2015-05-29 16:21:11 +00:00
Rui Ueyama 804a8b6361 COFF: Add /base option.
llvm-svn: 238567
2015-05-29 16:18:15 +00:00
Rui Ueyama 5c726433d2 COFF: Add /help option.
llvm-svn: 238565
2015-05-29 16:11:52 +00:00
Rui Ueyama 3d3e6fba6e COFF: Add /machine option.
llvm-svn: 238564
2015-05-29 16:06:00 +00:00
Rui Ueyama 3500f6667a COFF: Split Driver.cpp to Driver.cpp and DriverUtils.cpp. NFC.
The previous implementation's driver file is cluttered by lots of
small functions, and it was hard to find important functions.
Make a separate file to prevent that issue.

llvm-svn: 238482
2015-05-28 20:30:06 +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