Object: Add support for bigobj

This adds support for reading the "bigobj" variant of COFF produced by
cl's /bigobj and mingw's -mbig-obj.

The most significant difference that bigobj brings is more than 2**16
sections to COFF.

bigobj brings a few interesting differences with it:
- It doesn't have a Characteristics field in the file header.
- It doesn't have a SizeOfOptionalHeader field in the file header (it's
  only used in executable files).
- Auxiliary symbol records have the same width as a symbol table entry.
  Since symbol table entries are bigger, so are auxiliary symbol
  records.

Write support will come soon.

Differential Revision: http://reviews.llvm.org/D5259

llvm-svn: 217496

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/lib/MC/WinCOFFObjectWriter.cpp b/llvm/lib/MC/WinCOFFObjectWriter.cpp
index 489c92675f6..d382037e31a 100644
--- a/llvm/lib/MC/WinCOFFObjectWriter.cpp
+++ b/llvm/lib/MC/WinCOFFObjectWriter.cpp
@@ -849,7 +849,7 @@ void WinCOFFObjectWriter::WriteObject(MCAssembler &Asm,
     MakeSectionReal(*Section, Number);
   }
 
-  if (NumberOfSections > static_cast<size_t>(COFF::MaxNumberOfSections))
+  if (NumberOfSections > static_cast<size_t>(COFF::MaxNumberOfSections16))
     report_fatal_error(
         "PE COFF object files can't have more than 65,299 sections");