Commit Graph

521 Commits

Author SHA1 Message Date
Rui Ueyama d68ff34ad2 Fix unsafe memory access.
llvm-svn: 238669
2015-05-31 03:57:30 +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 e00d651071 Use initializer instead of memset to zero out.
llvm-svn: 238662
2015-05-30 19:28:58 +00:00
Rui Ueyama bfb4aa1791 COFF: Support long section name.
Section names were truncated to 8 bytes because the section table's
name field is 8 byte long. This patch creates the string table to
store long names.

llvm-svn: 238661
2015-05-30 19:09:50 +00:00
Peter Collingbourne 246ccc5f51 COFF: Move machine type auto-detection to SymbolTable.
The new mechanism is less code, and fixes the case where all inputs
are archives.

Differential Revision: http://reviews.llvm.org/D10136

llvm-svn: 238618
2015-05-29 21:47:36 +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 7c4fcdd559 COFF: Move Windows-specific function under Windows-specific marker.
llvm-svn: 238563
2015-05-29 15:49:09 +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 322b2c413d COFF: Return an error_code directly.
llvm-svn: 238486
2015-05-28 20:39:29 +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 d52824d361 Rename InputFile::Name -> InputFile::Filename.
Other local variables shadowed the member variable.
Rename to make that a bit longer.

llvm-svn: 238478
2015-05-28 20:16:25 +00:00
Rui Ueyama 9aefa0c6b9 Fix non-debug build.
llvm-svn: 238474
2015-05-28 20:04:51 +00:00
Rui Ueyama d6fefba447 COFF: Teach Chunk to write to a mmap'ed output file.
Previously Writer directly handles writes to a file.
Chunks needed to give Writer a continuous chunk of memory.
That was inefficent if you construct data in chunks because
it would require two memory copies (one to construct a chunk
and the other is to write that to a file).

This patch teaches chunk to write directly to a file.
From readability point of view, this is also good because
you no longer have to call hasData() before calling getData().

llvm-svn: 238464
2015-05-28 19:45:43 +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