aboutsummaryrefslogtreecommitdiffstats
path: root/lib/Object
diff options
context:
space:
mode:
Diffstat (limited to 'lib/Object')
-rw-r--r--lib/Object/ELFObjectFile.cpp34
1 files changed, 28 insertions, 6 deletions
diff --git a/lib/Object/ELFObjectFile.cpp b/lib/Object/ELFObjectFile.cpp
index 663b84e..2c8c1b1 100644
--- a/lib/Object/ELFObjectFile.cpp
+++ b/lib/Object/ELFObjectFile.cpp
@@ -12,6 +12,7 @@
//===----------------------------------------------------------------------===//
#include "llvm/Object/ELF.h"
+#include "llvm/Support/MathExtras.h"
namespace llvm {
@@ -22,16 +23,37 @@ ObjectFile *ObjectFile::createELFObjectFile(MemoryBuffer *Object) {
std::pair<unsigned char, unsigned char> Ident = getElfArchType(Object);
error_code ec;
+ std::size_t MaxAlignment =
+ 1ULL << CountTrailingZeros_64(uintptr_t(Object->getBufferStart()));
+
if (Ident.first == ELF::ELFCLASS32 && Ident.second == ELF::ELFDATA2LSB)
- return new ELFObjectFile<support::little, false>(Object, ec);
+ if (MaxAlignment >= 4)
+ return new ELFObjectFile<support::little, 4, false>(Object, ec);
+ else if (MaxAlignment >= 2)
+ return new ELFObjectFile<support::little, 2, false>(Object, ec);
+ else
+ llvm_unreachable("Invalid alignment for ELF file!");
else if (Ident.first == ELF::ELFCLASS32 && Ident.second == ELF::ELFDATA2MSB)
- return new ELFObjectFile<support::big, false>(Object, ec);
+ if (MaxAlignment >= 4)
+ return new ELFObjectFile<support::big, 4, false>(Object, ec);
+ else if (MaxAlignment >= 2)
+ return new ELFObjectFile<support::big, 2, false>(Object, ec);
+ else
+ llvm_unreachable("Invalid alignment for ELF file!");
else if (Ident.first == ELF::ELFCLASS64 && Ident.second == ELF::ELFDATA2MSB)
- return new ELFObjectFile<support::big, true>(Object, ec);
+ if (MaxAlignment >= 8)
+ return new ELFObjectFile<support::big, 8, true>(Object, ec);
+ else if (MaxAlignment >= 2)
+ return new ELFObjectFile<support::big, 2, true>(Object, ec);
+ else
+ llvm_unreachable("Invalid alignment for ELF file!");
else if (Ident.first == ELF::ELFCLASS64 && Ident.second == ELF::ELFDATA2LSB) {
- ELFObjectFile<support::little, true> *result =
- new ELFObjectFile<support::little, true>(Object, ec);
- return result;
+ if (MaxAlignment >= 8)
+ return new ELFObjectFile<support::little, 8, true>(Object, ec);
+ else if (MaxAlignment >= 2)
+ return new ELFObjectFile<support::little, 2, true>(Object, ec);
+ else
+ llvm_unreachable("Invalid alignment for ELF file!");
}
report_fatal_error("Buffer is not an ELF object file!");