void AArch64TargetWinCOFFStreamer::EmitARM64WinCFIEpilogEnd() {
auto &S = getStreamer();
WinEH::FrameInfo *CurFrame = S.EnsureValidWinFrameInfo(SMLoc());
if (!CurFrame)
return;
InEpilogCFI = false;
MCSymbol *Label = S.EmitCFILabel();
WinEH::Instruction Inst = WinEH::Instruction(Win64EH::UOP_End, Label, -1, 0);
CurFrame->EpilogMap[CurrentEpilog].push_back(Inst);
CurrentEpilog = nullptr;
}
// The functions below handle opcodes that can end up in either a prolog or
// an epilog, but not both.
void AArch64TargetWinCOFFStreamer::EmitARM64WinCFIPrologEnd() {
auto &S = getStreamer();
WinEH::FrameInfo *CurFrame = S.EnsureValidWinFrameInfo(SMLoc());
if (!CurFrame)
return;
MCSymbol *Label = S.EmitCFILabel();
CurFrame->PrologEnd = Label;
WinEH::Instruction Inst = WinEH::Instruction(Win64EH::UOP_End, Label, -1, 0);
auto it = CurFrame->Instructions.begin();
CurFrame->Instructions.insert(it, Inst);
}
// Helper function to common out unwind code setup for those codes that can
// belong to both prolog and epilog.
// There are three types of Windows ARM64 SEH codes. They can
// 1) take no operands: SEH_Nop, SEH_PrologEnd, SEH_EpilogStart, SEH_EpilogEnd
// 2) take an offset: SEH_StackAlloc, SEH_SaveFPLR, SEH_SaveFPLR_X
// 3) take a register and an offset/size: all others
void AArch64TargetWinCOFFStreamer::EmitARM64WinUnwindCode(unsigned UnwindCode,
int Reg,
int Offset) {
auto &S = getStreamer();
WinEH::FrameInfo *CurFrame = S.EnsureValidWinFrameInfo(SMLoc());
if (!CurFrame)
return;
MCSymbol *Label = S.EmitCFILabel();
auto Inst = WinEH::Instruction(UnwindCode, Label, Reg, Offset);
if (InEpilogCFI)
CurFrame->EpilogMap[CurrentEpilog].push_back(Inst);
else
CurFrame->Instructions.push_back(Inst);
}
void AVRTargetStreamer::finish() {
MCStreamer &OS = getStreamer();
MCContext &Context = OS.getContext();
MCSymbol *DoCopyData = Context.getOrCreateSymbol("__do_copy_data");
MCSymbol *DoClearBss = Context.getOrCreateSymbol("__do_clear_bss");
// FIXME: We can disable __do_copy_data if there are no static RAM variables.
OS.emitRawComment(" Declaring this symbol tells the CRT that it should");
OS.emitRawComment("copy all variables from program memory to RAM on startup");
OS.EmitSymbolAttribute(DoCopyData, MCSA_Global);
OS.emitRawComment(" Declaring this symbol tells the CRT that it should");
OS.emitRawComment("clear the zeroed data section on startup");
OS.EmitSymbolAttribute(DoClearBss, MCSA_Global);
}
