#include "llvm/Support/Debug.h"
#include "llvm/Support/Endian.h"
#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/JamCRC.h"
#include "llvm/Support/TimeValue.h"
#include <cstdio>
}
}
+ SmallVector<char, 128> SectionContents;
for (i = Sections.begin(), ie = Sections.end(), j = Asm.begin(),
je = Asm.end();
(i != ie) && (j != je); ++i, ++j) {
WriteZeros(SectionDataPadding);
+ // Save the contents of the section to a temporary buffer, we need this
+ // to CRC the data before we dump it into the object file.
+ SectionContents.clear();
+ raw_svector_ostream VecOS(SectionContents);
+ raw_pwrite_stream &OldStream = getStream();
+ // Redirect the output stream to our buffer.
+ setStream(VecOS);
+ // Fill our buffer with the section data.
Asm.writeSectionData(&*j, Layout);
+ // Reset the stream back to what it was before.
+ setStream(OldStream);
+
+ // Calculate our CRC with an initial value of '0', this is not how
+ // JamCRC is specified but it aligns with the expected output.
+ JamCRC JC(/*Init=*/0x00000000U);
+ JC.update(SectionContents);
+
+ // Write the section contents to the object file.
+ getStream() << SectionContents;
+
+ // Update the section definition auxiliary symbol to record the CRC.
+ COFFSection *Sec = SectionMap[&*j];
+ COFFSymbol::AuxiliarySymbols &AuxSyms = Sec->Symbol->Aux;
+ assert(AuxSyms.size() == 1 &&
+ AuxSyms[0].AuxType == ATSectionDefinition);
+ AuxSymbol &SecDef = AuxSyms[0];
+ SecDef.Aux.SectionDefinition.CheckSum = JC.getCRC();
}
if ((*i)->Relocations.size() > 0) {