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Add more methods to gather target specific elf stuff

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Support for .text relocations, implementing TargetELFWriter overloaded methods for x86/x86_64.
Use a map to track global values to their symbol table indexes
Code cleanup and small fixes



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73894 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bruno Cardoso Lopes
2009-06-22 19:16:16 +00:00
parent 8dcbbdd00e
commit 0d3193ef3c
8 changed files with 427 additions and 164 deletions
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lib/CodeGen/ELFCodeEmitter.cpp
+24 -26
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@@ -71,38 +71,37 @@ bool ELFCodeEmitter::finishFunction(MachineFunction &MF) {
// Update Section Size
ES->Size = CurBufferPtr - BufferBegin;
// Figure out the binding (linkage) of the symbol.
switch (MF.getFunction()->getLinkage()) {
default:
// appending linkage is illegal for functions.
assert(0 && "Unknown linkage type!");
case GlobalValue::ExternalLinkage:
FnSym.SetBind(ELFSym::STB_GLOBAL);
break;
case GlobalValue::LinkOnceAnyLinkage:
case GlobalValue::LinkOnceODRLinkage:
case GlobalValue::WeakAnyLinkage:
case GlobalValue::WeakODRLinkage:
FnSym.SetBind(ELFSym::STB_WEAK);
break;
case GlobalValue::PrivateLinkage:
assert (0 && "PrivateLinkage should not be in the symbol table.");
case GlobalValue::InternalLinkage:
FnSym.SetBind(ELFSym::STB_LOCAL);
break;
}
// Set the symbol type as a function
FnSym.SetType(ELFSym::STT_FUNC);
FnSym.setType(ELFSym::STT_FUNC);
FnSym.SectionIdx = ES->SectionIdx;
FnSym.Size = CurBufferPtr-FnStartPtr;
// Offset from start of Section
FnSym.Value = FnStartPtr-BufferBegin;
// Finally, add it to the symtab.
EW.SymbolList.push_back(FnSym);
// Figure out the binding (linkage) of the symbol.
switch (MF.getFunction()->getLinkage()) {
default:
// appending linkage is illegal for functions.
assert(0 && "Unknown linkage type!");
case GlobalValue::ExternalLinkage:
FnSym.setBind(ELFSym::STB_GLOBAL);
EW.SymbolList.push_back(FnSym);
break;
case GlobalValue::LinkOnceAnyLinkage:
case GlobalValue::LinkOnceODRLinkage:
case GlobalValue::WeakAnyLinkage:
case GlobalValue::WeakODRLinkage:
FnSym.setBind(ELFSym::STB_WEAK);
EW.SymbolList.push_back(FnSym);
break;
case GlobalValue::PrivateLinkage:
assert (0 && "PrivateLinkage should not be in the symbol table.");
case GlobalValue::InternalLinkage:
FnSym.setBind(ELFSym::STB_LOCAL);
EW.SymbolList.push_front(FnSym);
break;
}
// Relocations
// -----------
@@ -113,7 +112,6 @@ bool ELFCodeEmitter::finishFunction(MachineFunction &MF) {
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);