The directive '.option pic2' enables PIC from assembly source.
At the moment none of the macros/directives check the PIC bit
but that's going to be fixed relatively soon. For example, the
expansion of macros like 'la' depend on the relocation model.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204803
91177308-0d34-0410-b5e6-
96231b3b80d8
return false;
}
+ if (Option == "pic2") {
+ getTargetStreamer().emitDirectiveOptionPic2();
+ Parser.Lex();
+ if (Parser.getTok().isNot(AsmToken::EndOfStatement)) {
+ Error(Parser.getTok().getLoc(),
+ "unexpected token in .option pic2 directive");
+ Parser.eatToEndOfStatement();
+ }
+ return false;
+ }
+
// Unknown option.
Warning(Parser.getTok().getLoc(), "unknown option in .option directive");
Parser.eatToEndOfStatement();
OS << "\t.option\tpic0\n";
}
+void MipsTargetAsmStreamer::emitDirectiveOptionPic2() {
+ OS << "\t.option\tpic2\n";
+}
+
void MipsTargetAsmStreamer::emitFrame(unsigned StackReg, unsigned StackSize,
unsigned ReturnReg) {
OS << "\t.frame\t$"
MCAssembler &MCA = getStreamer().getAssembler();
uint64_t Features = STI.getFeatureBits();
Triple T(STI.getTargetTriple());
+ Pic = (MCA.getContext().getObjectFileInfo()->getRelocM() == Reloc::PIC_)
+ ? true
+ : false;
// Update e_header flags
unsigned EFlags = 0;
void MipsTargetELFStreamer::emitDirectiveOptionPic0() {
MCAssembler &MCA = getStreamer().getAssembler();
unsigned Flags = MCA.getELFHeaderEFlags();
+ // This option overrides other PIC options like -KPIC.
+ Pic = false;
Flags &= ~ELF::EF_MIPS_PIC;
MCA.setELFHeaderEFlags(Flags);
}
+void MipsTargetELFStreamer::emitDirectiveOptionPic2() {
+ MCAssembler &MCA = getStreamer().getAssembler();
+ unsigned Flags = MCA.getELFHeaderEFlags();
+ Pic = true;
+ // NOTE: We are following the GAS behaviour here which means the directive
+ // 'pic2' also sets the CPIC bit in the ELF header. This is different from
+ // what is stated in the SYSV ABI which consider the bits EF_MIPS_PIC and
+ // EF_MIPS_CPIC to be mutually exclusive.
+ Flags |= ELF::EF_MIPS_PIC | ELF::EF_MIPS_CPIC;
+ MCA.setELFHeaderEFlags(Flags);
+}
+
void MipsTargetELFStreamer::emitFrame(unsigned StackReg, unsigned StackSize,
unsigned ReturnReg) {
// FIXME: implement.
virtual void emitDirectiveEnt(const MCSymbol &Symbol) = 0;
virtual void emitDirectiveAbiCalls() = 0;
virtual void emitDirectiveOptionPic0() = 0;
+ virtual void emitDirectiveOptionPic2() = 0;
virtual void emitFrame(unsigned StackReg, unsigned StackSize,
unsigned ReturnReg) = 0;
virtual void emitMask(unsigned CPUBitmask, int CPUTopSavedRegOff) = 0;
virtual void emitDirectiveEnt(const MCSymbol &Symbol);
virtual void emitDirectiveAbiCalls();
virtual void emitDirectiveOptionPic0();
+ virtual void emitDirectiveOptionPic2();
virtual void emitFrame(unsigned StackReg, unsigned StackSize,
unsigned ReturnReg);
virtual void emitMask(unsigned CPUBitmask, int CPUTopSavedRegOff);
class MipsTargetELFStreamer : public MipsTargetStreamer {
bool MicroMipsEnabled;
const MCSubtargetInfo &STI;
+ bool Pic;
public:
bool isMicroMipsEnabled() const { return MicroMipsEnabled; }
virtual void emitDirectiveEnt(const MCSymbol &Symbol);
virtual void emitDirectiveAbiCalls();
virtual void emitDirectiveOptionPic0();
+ virtual void emitDirectiveOptionPic2();
virtual void emitFrame(unsigned StackReg, unsigned StackSize,
unsigned ReturnReg);
virtual void emitMask(unsigned CPUBitmask, int CPUTopSavedRegOff);
--- /dev/null
+# RUN: llvm-mc -filetype=obj -triple mipsel-unknown-linux -mcpu=mips32 %s -o -| llvm-readobj -h | FileCheck %s
+
+# This *MUST* match the output of gas compiled with the same triple.
+# CHECK: Flags [ (0x50001006)
+
+.option pic2
.option pic0 pic2
# CHECK-NEXT: :{{[0-9]+}}:{{[0-9]+}}: error: unexpected token in .option pic0 directive
# CHECK-NEXT: .option pic0 pic2
+# CHECK-NEXT: ^
+
+ .option pic2,
+# CHECK-NEXT: :{{[0-9]+}}:{{[0-9]+}}: error: unexpected token in .option pic2 directive
+# CHECK-NEXT: .option pic2,
+# CHECK-NEXT: ^
+
+ .option pic2 pic3
+# CHECK-NEXT: :{{[0-9]+}}:{{[0-9]+}}: error: unexpected token in .option pic2 directive
+# CHECK-NEXT: .option pic2 pic3
# CHECK-NEXT: ^