#include "llvm/MC/MCSectionCOFF.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
+#include "llvm/Support/Win64EH.h"
namespace llvm {
// NOTE: All relocations generated here are 4-byte image-relative.
-static uint8_t CountOfUnwindCodes(std::vector<MCWin64EHInstruction> &Insns) {
+static uint8_t CountOfUnwindCodes(std::vector<WinEH::Instruction> &Insns) {
uint8_t Count = 0;
for (const auto &I : Insns) {
- switch (I.Operation) {
+ switch (static_cast<Win64EH::UnwindOpcodes>(I.Operation)) {
case Win64EH::UOP_PushNonVol:
case Win64EH::UOP_AllocSmall:
case Win64EH::UOP_SetFPReg:
const MCSymbol *RHS) {
MCContext &Context = Streamer.getContext();
const MCExpr *Diff =
- MCBinaryExpr::CreateSub(MCSymbolRefExpr::Create(LHS, Context),
- MCSymbolRefExpr::Create(RHS, Context), Context);
- Streamer.EmitAbsValue(Diff, 1);
+ MCBinaryExpr::createSub(MCSymbolRefExpr::create(LHS, Context),
+ MCSymbolRefExpr::create(RHS, Context), Context);
+ Streamer.EmitValue(Diff, 1);
}
-static void EmitUnwindCode(MCStreamer &streamer, MCSymbol *begin,
- MCWin64EHInstruction &inst) {
+static void EmitUnwindCode(MCStreamer &streamer, const MCSymbol *begin,
+ WinEH::Instruction &inst) {
uint8_t b2;
uint16_t w;
b2 = (inst.Operation & 0x0F);
- switch (inst.Operation) {
+ switch (static_cast<Win64EH::UnwindOpcodes>(inst.Operation)) {
case Win64EH::UOP_PushNonVol:
EmitAbsDifference(streamer, inst.Label, begin);
b2 |= (inst.Register & 0x0F) << 4;
const MCSymbol *Base,
const MCSymbol *Other) {
MCContext &Context = streamer.getContext();
- const MCSymbolRefExpr *BaseRef = MCSymbolRefExpr::Create(Base, Context);
- const MCSymbolRefExpr *OtherRef = MCSymbolRefExpr::Create(Other, Context);
- const MCExpr *Ofs = MCBinaryExpr::CreateSub(OtherRef, BaseRef, Context);
- const MCSymbolRefExpr *BaseRefRel = MCSymbolRefExpr::Create(Base,
+ const MCSymbolRefExpr *BaseRef = MCSymbolRefExpr::create(Base, Context);
+ const MCSymbolRefExpr *OtherRef = MCSymbolRefExpr::create(Other, Context);
+ const MCExpr *Ofs = MCBinaryExpr::createSub(OtherRef, BaseRef, Context);
+ const MCSymbolRefExpr *BaseRefRel = MCSymbolRefExpr::create(Base,
MCSymbolRefExpr::VK_COFF_IMGREL32,
Context);
- streamer.EmitValue(MCBinaryExpr::CreateAdd(BaseRefRel, Ofs, Context), 4);
+ streamer.EmitValue(MCBinaryExpr::createAdd(BaseRefRel, Ofs, Context), 4);
}
static void EmitRuntimeFunction(MCStreamer &streamer,
- const MCWinFrameInfo *info) {
+ const WinEH::FrameInfo *info) {
MCContext &context = streamer.getContext();
streamer.EmitValueToAlignment(4);
EmitSymbolRefWithOfs(streamer, info->Function, info->Begin);
EmitSymbolRefWithOfs(streamer, info->Function, info->End);
- streamer.EmitValue(MCSymbolRefExpr::Create(info->Symbol,
+ streamer.EmitValue(MCSymbolRefExpr::create(info->Symbol,
MCSymbolRefExpr::VK_COFF_IMGREL32,
context), 4);
}
-static void EmitUnwindInfo(MCStreamer &streamer, MCWinFrameInfo *info) {
+static void EmitUnwindInfo(MCStreamer &streamer, WinEH::FrameInfo *info) {
// If this UNWIND_INFO already has a symbol, it's already been emitted.
- if (info->Symbol) return;
+ if (info->Symbol)
+ return;
MCContext &context = streamer.getContext();
+ MCSymbol *Label = context.createTempSymbol();
+
streamer.EmitValueToAlignment(4);
- info->Symbol = context.CreateTempSymbol();
- streamer.EmitLabel(info->Symbol);
+ streamer.EmitLabel(Label);
+ info->Symbol = Label;
// Upper 3 bits are the version number (currently 1).
uint8_t flags = 0x01;
uint8_t frame = 0;
if (info->LastFrameInst >= 0) {
- MCWin64EHInstruction &frameInst = info->Instructions[info->LastFrameInst];
+ WinEH::Instruction &frameInst = info->Instructions[info->LastFrameInst];
assert(frameInst.Operation == Win64EH::UOP_SetFPReg);
frame = (frameInst.Register & 0x0F) | (frameInst.Offset & 0xF0);
}
// Emit unwind instructions (in reverse order).
uint8_t numInst = info->Instructions.size();
for (uint8_t c = 0; c < numInst; ++c) {
- MCWin64EHInstruction inst = info->Instructions.back();
+ WinEH::Instruction inst = info->Instructions.back();
info->Instructions.pop_back();
EmitUnwindCode(streamer, info->Begin, inst);
}
EmitRuntimeFunction(streamer, info->ChainedParent);
else if (flags &
((Win64EH::UNW_TerminateHandler|Win64EH::UNW_ExceptionHandler) << 3))
- streamer.EmitValue(MCSymbolRefExpr::Create(info->ExceptionHandler,
+ streamer.EmitValue(MCSymbolRefExpr::create(info->ExceptionHandler,
MCSymbolRefExpr::VK_COFF_IMGREL32,
context), 4);
else if (numCodes == 0) {
}
}
-StringRef MCWin64EHUnwindEmitter::GetSectionSuffix(const MCSymbol *func) {
- if (!func || !func->isInSection()) return "";
- const MCSection *section = &func->getSection();
- const MCSectionCOFF *COFFSection;
- if ((COFFSection = dyn_cast<MCSectionCOFF>(section))) {
- StringRef name = COFFSection->getSectionName();
- size_t dollar = name.find('$');
- size_t dot = name.find('.', 1);
- if (dollar == StringRef::npos && dot == StringRef::npos)
- return "";
- if (dot == StringRef::npos)
- return name.substr(dollar);
- if (dollar == StringRef::npos || dot < dollar)
- return name.substr(dot);
- return name.substr(dollar);
- }
- return "";
-}
-
-static const MCSection *getWin64EHTableSection(StringRef suffix,
- MCContext &context) {
- if (suffix == "")
- return context.getObjectFileInfo()->getXDataSection();
-
- return context.getCOFFSection((".xdata"+suffix).str(),
- COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getDataRel());
-}
-
-static const MCSection *getWin64EHFuncTableSection(StringRef suffix,
- MCContext &context) {
- if (suffix == "")
- return context.getObjectFileInfo()->getPDataSection();
- return context.getCOFFSection((".pdata"+suffix).str(),
- COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getDataRel());
-}
-
-void MCWin64EHUnwindEmitter::EmitUnwindInfo(MCStreamer &streamer,
- MCWinFrameInfo *info) {
- // Switch sections (the static function above is meant to be called from
- // here and from Emit().
- MCContext &context = streamer.getContext();
- const MCSection *xdataSect =
- getWin64EHTableSection(GetSectionSuffix(info->Function), context);
- streamer.SwitchSection(xdataSect);
-
- llvm::EmitUnwindInfo(streamer, info);
-}
-
-void MCWin64EHUnwindEmitter::Emit(MCStreamer &Streamer) {
+namespace Win64EH {
+void UnwindEmitter::Emit(MCStreamer &Streamer) const {
MCContext &Context = Streamer.getContext();
// Emit the unwind info structs first.
for (const auto &CFI : Streamer.getWinFrameInfos()) {
- const MCSection *XData =
- getWin64EHTableSection(GetSectionSuffix(CFI->Function), Context);
+ MCSection *XData = getXDataSection(CFI->Function, Context);
Streamer.SwitchSection(XData);
EmitUnwindInfo(Streamer, CFI);
}
// Now emit RUNTIME_FUNCTION entries.
for (const auto &CFI : Streamer.getWinFrameInfos()) {
- const MCSection *PData =
- getWin64EHFuncTableSection(GetSectionSuffix(CFI->Function), Context);
+ MCSection *PData = getPDataSection(CFI->Function, Context);
Streamer.SwitchSection(PData);
EmitRuntimeFunction(Streamer, CFI);
}
}
+void UnwindEmitter::EmitUnwindInfo(MCStreamer &Streamer,
+ WinEH::FrameInfo *info) const {
+ // Switch sections (the static function above is meant to be called from
+ // here and from Emit().
+ MCContext &context = Streamer.getContext();
+ MCSection *xdataSect = getXDataSection(info->Function, context);
+ Streamer.SwitchSection(xdataSect);
+
+ llvm::EmitUnwindInfo(Streamer, info);
+}
+}
} // End of namespace llvm
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