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9 Commits

Author SHA1 Message Date
Rui Ueyama ce9b9abb15 [PECOFF] Add file extensions to temporary files. 
No functionality change.

llvm-svn: 198075
 2013-12-27 08:37:40 +00:00
Rui Ueyama fc5f18ba0d Fix a bug that undefined symbols are not reported if dead-stripping is enabled. 
There was a bug that the linker does not report an error if symbols specified
by -u (or /include on Windows) are not resolved. This patch fixes it by adding
such symbols to the dead strip root.

llvm-svn: 198041
 2013-12-26 08:37:16 +00:00
Rui Ueyama 26c191aec6 [PECOFF] Remove extraneous command line options from tests. 
llvm-svn: 195854
 2013-11-27 17:43:54 +00:00
Rui Ueyama 1ce8a0a8ed [PECOFF] Only COMDAT symbols are allowed to be dead-stripped. 
We should dead-strip atoms only if they are created for COMDAT symbols. If we
remove non-COMDAT atoms from a binary, it will no longer be guaranteed that
the binary will work correctly.

In COFF, you can manipulate the order of section contents in the resulting
binary by section name. For example, if you have four sections
.data$unique_prefix_{a,b,c,d}, it's guaranteed that the contents of A, B, C,
and D will be consecutive in the resulting .data section in that order.
Thus, you can access B's and C's contents by incrementing a pointer pointing
to A until it reached to D. That's why we cannot dead-strip B or C even if
no one is directly referencing to them.

Some object files in the standard library actually use that technique.

llvm-svn: 193017
 2013-10-18 23:54:55 +00:00
Rui Ueyama bc839fcd3e [PECOFF] Enable dead-stripping by default to match link.exe behavior. 
llvm-svn: 189308
 2013-08-27 03:38:18 +00:00
Rui Ueyama d1d116aa89 [PECOFF] Use Windows style options instead of Unix style as primary options. 
LLD still accepts both Unix and Windows style options when it's run as
link.exe. This patch does not change functionality.

llvm-svn: 187086
 2013-07-24 23:18:02 +00:00
Rui Ueyama d769cec6e3 [PECOFF] Use yaml2obj to avoid checking in binary files. 
llvm-svn: 185690
 2013-07-05 10:41:44 +00:00
Rui Ueyama 4251055a66 [PECOFF][Writer] Fix a bug that the contents of .data and .rdata were swapped. 
llvm-svn: 185130
 2013-06-28 04:15:37 +00:00
Rui Ueyama 991f42c35f [PECOFF] Add a pass to ensure the correct ordering of grouped sections. 
Reviewers: shankarke

CC: llvm-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D998

llvm-svn: 184327
 2013-06-19 17:46:57 +00:00