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Simple ELF32/64 binary files can now be emitted for x86 and x86_64 without

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relocation sections.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73038 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bruno Cardoso Lopes
2009-06-07 21:22:38 +00:00
parent faeedf1254
commit a029a27fae
6 changed files with 174 additions and 60 deletions
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28
lib/CodeGen/ELFCodeEmitter.cpp
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@@ -73,6 +73,9 @@ bool ELFCodeEmitter::finishFunction(MachineFunction &MF) {
// Add a symbol to represent the function.
ELFSym FnSym(MF.getFunction());
// Update Section Size
ES->Size = CurBufferPtr - BufferBegin;
// Figure out the binding (linkage) of the symbol.
switch (MF.getFunction()->getLinkage()) {
default:
@@ -106,8 +109,29 @@ bool ELFCodeEmitter::finishFunction(MachineFunction &MF) {
// Finally, add it to the symtab.
EW.SymbolTable.push_back(FnSym);
// Update Section Size
ES->Size = CurBufferPtr - BufferBegin;
// Relocations
// -----------
// If we have emitted any relocations to function-specific objects such as
// basic blocks, constant pools entries, or jump tables, record their
// addresses now so that we can rewrite them with the correct addresses
// later.
for (unsigned i = 0, e = Relocations.size(); i != e; ++i) {
MachineRelocation &MR = Relocations[i];
intptr_t Addr;
if (MR.isBasicBlock()) {
Addr = getMachineBasicBlockAddress(MR.getBasicBlock());
MR.setConstantVal(ES->SectionIdx);
MR.setResultPointer((void*)Addr);
} else if (MR.isGlobalValue()) {
EW.PendingGlobals.insert(MR.getGlobalValue());
} else {
assert(0 && "Unhandled relocation type");
}
ES->Relocations.push_back(MR);
}
Relocations.clear();
return false;
}