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Implement the missing bits corresponding to .mips_hack_elf_flags.

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These were:
* noreorder handling on the target object streamer and asm parser.
* setting the initial flag bits based on the enabled features.
* setting the elf header flag for micromips

It is *really* depressing I am the one doing this instead of someone at
mips actually taking the time to understand the infrastructure.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200138 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2014-01-26 06:57:13 +00:00
parent 550d791907
commit 5356e75b5b
13 changed files with 136 additions and 119 deletions
Download Patch File Download Diff File Expand all files Collapse all files

65
lib/Target/Mips/MCTargetDesc/MipsTargetStreamer.cpp
View File

@@ -12,8 +12,10 @@
//===----------------------------------------------------------------------===//
#include "MipsTargetStreamer.h"
#include "MipsMCTargetDesc.h"
#include "llvm/MC/MCELF.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ELF.h"
#include "llvm/Support/ErrorHandling.h"
@@ -21,9 +23,6 @@
using namespace llvm;
static cl::opt<bool> PrintHackDirectives("print-hack-directives",
cl::init(false), cl::Hidden);
// Pin vtable to this file.
void MipsTargetStreamer::anchor() {}
@@ -33,15 +32,6 @@ MipsTargetAsmStreamer::MipsTargetAsmStreamer(MCStreamer &S,
formatted_raw_ostream &OS)
: MipsTargetStreamer(S), OS(OS) {}
void MipsTargetAsmStreamer::emitMipsHackELFFlags(unsigned Flags) {
if (!PrintHackDirectives)
return;
OS << "\t.mips_hack_elf_flags 0x";
OS.write_hex(Flags);
OS << '\n';
}
void MipsTargetAsmStreamer::emitDirectiveSetMicroMips() {
OS << "\t.set\tmicromips\n";
}
@@ -96,8 +86,38 @@ void MipsTargetAsmStreamer::emitDirectiveOptionPic0() {
}
// This part is for ELF object output.
MipsTargetELFStreamer::MipsTargetELFStreamer(MCStreamer &S)
: MipsTargetStreamer(S), MicroMipsEnabled(false) {}
MipsTargetELFStreamer::MipsTargetELFStreamer(MCStreamer &S,
const MCSubtargetInfo &STI)
: MipsTargetStreamer(S), MicroMipsEnabled(false) {
MCAssembler &MCA = getStreamer().getAssembler();
uint64_t Features = STI.getFeatureBits();
Triple T(STI.getTargetTriple());
// Update e_header flags
unsigned EFlags = 0;
// Architecture
if (Features & Mips::FeatureMips64r2)
EFlags |= ELF::EF_MIPS_ARCH_64R2;
else if (Features & Mips::FeatureMips64)
EFlags |= ELF::EF_MIPS_ARCH_64;
else if (Features & Mips::FeatureMips32r2)
EFlags |= ELF::EF_MIPS_ARCH_32R2;
else if (Features & Mips::FeatureMips32)
EFlags |= ELF::EF_MIPS_ARCH_32;
if (T.isArch64Bit()) {
EFlags |= ELF::EF_MIPS_ABI2;
} else {
if (Features & Mips::FeatureMips64r2 || Features & Mips::FeatureMips64)
EFlags |= ELF::EF_MIPS_32BITMODE;
// ABI
EFlags |= ELF::EF_MIPS_ABI_O32;
}
MCA.setELFHeaderEFlags(EFlags);
}
void MipsTargetELFStreamer::emitLabel(MCSymbol *Symbol) {
if (!isMicroMipsEnabled())
@@ -117,13 +137,13 @@ MCELFStreamer &MipsTargetELFStreamer::getStreamer() {
return static_cast<MCELFStreamer &>(Streamer);
}
void MipsTargetELFStreamer::emitMipsHackELFFlags(unsigned Flags) {
MCAssembler &MCA = getStreamer().getAssembler();
MCA.setELFHeaderEFlags(Flags);
}
void MipsTargetELFStreamer::emitDirectiveSetMicroMips() {
MicroMipsEnabled = true;
MCAssembler &MCA = getStreamer().getAssembler();
unsigned Flags = MCA.getELFHeaderEFlags();
Flags |= ELF::EF_MIPS_MICROMIPS;
MCA.setELFHeaderEFlags(Flags);
}
void MipsTargetELFStreamer::emitDirectiveSetNoMicroMips() {
@@ -146,7 +166,10 @@ void MipsTargetELFStreamer::emitDirectiveSetReorder() {
}
void MipsTargetELFStreamer::emitDirectiveSetNoReorder() {
// FIXME: implement.
MCAssembler &MCA = getStreamer().getAssembler();
unsigned Flags = MCA.getELFHeaderEFlags();
Flags |= ELF::EF_MIPS_NOREORDER;
MCA.setELFHeaderEFlags(Flags);
}
void MipsTargetELFStreamer::emitDirectiveSetMacro() {
@@ -176,7 +199,7 @@ void MipsTargetELFStreamer::emitDirectiveEnt(const MCSymbol &Symbol) {
void MipsTargetELFStreamer::emitDirectiveAbiCalls() {
MCAssembler &MCA = getStreamer().getAssembler();
unsigned Flags = MCA.getELFHeaderEFlags();
Flags |= ELF::EF_MIPS_CPIC;
Flags |= ELF::EF_MIPS_CPIC | ELF::EF_MIPS_PIC;
MCA.setELFHeaderEFlags(Flags);
}
void MipsTargetELFStreamer::emitDirectiveOptionPic0() {