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path: root/contrib/llvm/lib/MC/MCELFStreamer.cpp
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Diffstat (limited to 'contrib/llvm/lib/MC/MCELFStreamer.cpp')
-rw-r--r--contrib/llvm/lib/MC/MCELFStreamer.cpp122
1 files changed, 82 insertions, 40 deletions
diff --git a/contrib/llvm/lib/MC/MCELFStreamer.cpp b/contrib/llvm/lib/MC/MCELFStreamer.cpp
index 116f86feb8a5..e806cb9f1c94 100644
--- a/contrib/llvm/lib/MC/MCELFStreamer.cpp
+++ b/contrib/llvm/lib/MC/MCELFStreamer.cpp
@@ -15,6 +15,7 @@
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/MC/MCAssembler.h"
+#include "llvm/MC/MCAsmBackend.h"
#include "llvm/MC/MCCodeEmitter.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCELF.h"
@@ -96,6 +97,9 @@ void MCELFStreamer::EmitDebugLabel(MCSymbol *Symbol) {
}
void MCELFStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {
+ // Let the target do whatever target specific stuff it needs to do.
+ getAssembler().getBackend().handleAssemblerFlag(Flag);
+ // Do any generic stuff we need to do.
switch (Flag) {
case MCAF_SyntaxUnified: return; // no-op here.
case MCAF_Code16: return; // Change parsing mode; no-op here.
@@ -148,8 +152,8 @@ static unsigned CombineSymbolTypes(unsigned T1, unsigned T2) {
return T2;
}
-void MCELFStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
- MCSymbolAttr Attribute) {
+bool MCELFStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
+ MCSymbolAttr Attribute) {
// Indirect symbols are handled differently, to match how 'as' handles
// them. This makes writing matching .o files easier.
if (Attribute == MCSA_IndirectSymbol) {
@@ -159,7 +163,7 @@ void MCELFStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
ISD.Symbol = Symbol;
ISD.SectionData = getCurrentSectionData();
getAssembler().getIndirectSymbols().push_back(ISD);
- return;
+ return true;
}
// Adding a symbol attribute always introduces the symbol, note that an
@@ -182,7 +186,7 @@ void MCELFStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
case MCSA_WeakDefAutoPrivate:
case MCSA_Invalid:
case MCSA_IndirectSymbol:
- llvm_unreachable("Invalid symbol attribute for ELF!");
+ return false;
case MCSA_NoDeadStrip:
case MCSA_ELF_TypeGnuUniqueObject:
@@ -251,6 +255,8 @@ void MCELFStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
MCELF::SetVisibility(SD, ELF::STV_INTERNAL);
break;
}
+
+ return true;
}
void MCELFStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
@@ -270,7 +276,8 @@ void MCELFStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
ELF::SHF_WRITE |
ELF::SHF_ALLOC,
SectionKind::getBSS());
- Symbol->setSection(*Section);
+
+ AssignSection(Symbol, Section);
struct LocalCommon L = {&SD, Size, ByteAlignment};
LocalCommons.push_back(L);
@@ -296,12 +303,11 @@ void MCELFStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
EmitCommonSymbol(Symbol, Size, ByteAlignment);
}
-void MCELFStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size,
- unsigned AddrSpace) {
+void MCELFStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size) {
if (getCurrentSectionData()->isBundleLocked())
report_fatal_error("Emitting values inside a locked bundle is forbidden");
fixSymbolsInTLSFixups(Value);
- MCObjectStreamer::EmitValueImpl(Value, Size, AddrSpace);
+ MCObjectStreamer::EmitValueImpl(Value, Size);
}
void MCELFStreamer::EmitValueToAlignment(unsigned ByteAlignment,
@@ -314,20 +320,29 @@ void MCELFStreamer::EmitValueToAlignment(unsigned ByteAlignment,
ValueSize, MaxBytesToEmit);
}
-
-// Add a symbol for the file name of this module. This is the second
-// entry in the module's symbol table (the first being the null symbol).
+// Add a symbol for the file name of this module. They start after the
+// null symbol and don't count as normal symbol, i.e. a non-STT_FILE symbol
+// with the same name may appear.
void MCELFStreamer::EmitFileDirective(StringRef Filename) {
- MCSymbol *Symbol = getAssembler().getContext().GetOrCreateSymbol(Filename);
- Symbol->setSection(*getCurrentSection().first);
- Symbol->setAbsolute();
-
- MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol);
-
- SD.setFlags(ELF_STT_File | ELF_STB_Local | ELF_STV_Default);
+ getAssembler().addFileName(Filename);
+}
+
+void MCELFStreamer::EmitIdent(StringRef IdentString) {
+ const MCSection *Comment = getAssembler().getContext().getELFSection(
+ ".comment", ELF::SHT_PROGBITS, ELF::SHF_MERGE | ELF::SHF_STRINGS,
+ SectionKind::getReadOnly(), 1, "");
+ PushSection();
+ SwitchSection(Comment);
+ if (!SeenIdent) {
+ EmitIntValue(0, 1);
+ SeenIdent = true;
+ }
+ EmitBytes(IdentString);
+ EmitIntValue(0, 1);
+ PopSection();
}
-void MCELFStreamer::fixSymbolsInTLSFixups(const MCExpr *expr) {
+void MCELFStreamer::fixSymbolsInTLSFixups(const MCExpr *expr) {
switch (expr->getKind()) {
case MCExpr::Target:
cast<MCTargetExpr>(expr)->fixELFSymbolsInTLSFixups(getAssembler());
@@ -363,18 +378,41 @@ void MCELFStreamer::fixSymbolsInTLSFixups(const MCExpr *expr) {
case MCSymbolRefExpr::VK_Mips_GOTTPREL:
case MCSymbolRefExpr::VK_Mips_TPREL_HI:
case MCSymbolRefExpr::VK_Mips_TPREL_LO:
- case MCSymbolRefExpr::VK_PPC_TPREL16_HA:
- case MCSymbolRefExpr::VK_PPC_TPREL16_LO:
- case MCSymbolRefExpr::VK_PPC_DTPREL16_HA:
- case MCSymbolRefExpr::VK_PPC_DTPREL16_LO:
- case MCSymbolRefExpr::VK_PPC_GOT_TPREL16_HA:
- case MCSymbolRefExpr::VK_PPC_GOT_TPREL16_LO:
+ case MCSymbolRefExpr::VK_PPC_DTPMOD:
+ case MCSymbolRefExpr::VK_PPC_TPREL:
+ case MCSymbolRefExpr::VK_PPC_TPREL_LO:
+ case MCSymbolRefExpr::VK_PPC_TPREL_HI:
+ case MCSymbolRefExpr::VK_PPC_TPREL_HA:
+ case MCSymbolRefExpr::VK_PPC_TPREL_HIGHER:
+ case MCSymbolRefExpr::VK_PPC_TPREL_HIGHERA:
+ case MCSymbolRefExpr::VK_PPC_TPREL_HIGHEST:
+ case MCSymbolRefExpr::VK_PPC_TPREL_HIGHESTA:
+ case MCSymbolRefExpr::VK_PPC_DTPREL:
+ case MCSymbolRefExpr::VK_PPC_DTPREL_LO:
+ case MCSymbolRefExpr::VK_PPC_DTPREL_HI:
+ case MCSymbolRefExpr::VK_PPC_DTPREL_HA:
+ case MCSymbolRefExpr::VK_PPC_DTPREL_HIGHER:
+ case MCSymbolRefExpr::VK_PPC_DTPREL_HIGHERA:
+ case MCSymbolRefExpr::VK_PPC_DTPREL_HIGHEST:
+ case MCSymbolRefExpr::VK_PPC_DTPREL_HIGHESTA:
+ case MCSymbolRefExpr::VK_PPC_GOT_TPREL:
+ case MCSymbolRefExpr::VK_PPC_GOT_TPREL_LO:
+ case MCSymbolRefExpr::VK_PPC_GOT_TPREL_HI:
+ case MCSymbolRefExpr::VK_PPC_GOT_TPREL_HA:
+ case MCSymbolRefExpr::VK_PPC_GOT_DTPREL:
+ case MCSymbolRefExpr::VK_PPC_GOT_DTPREL_LO:
+ case MCSymbolRefExpr::VK_PPC_GOT_DTPREL_HI:
+ case MCSymbolRefExpr::VK_PPC_GOT_DTPREL_HA:
case MCSymbolRefExpr::VK_PPC_TLS:
- case MCSymbolRefExpr::VK_PPC_GOT_TLSGD16_HA:
- case MCSymbolRefExpr::VK_PPC_GOT_TLSGD16_LO:
+ case MCSymbolRefExpr::VK_PPC_GOT_TLSGD:
+ case MCSymbolRefExpr::VK_PPC_GOT_TLSGD_LO:
+ case MCSymbolRefExpr::VK_PPC_GOT_TLSGD_HI:
+ case MCSymbolRefExpr::VK_PPC_GOT_TLSGD_HA:
case MCSymbolRefExpr::VK_PPC_TLSGD:
- case MCSymbolRefExpr::VK_PPC_GOT_TLSLD16_HA:
- case MCSymbolRefExpr::VK_PPC_GOT_TLSLD16_LO:
+ case MCSymbolRefExpr::VK_PPC_GOT_TLSLD:
+ case MCSymbolRefExpr::VK_PPC_GOT_TLSLD_LO:
+ case MCSymbolRefExpr::VK_PPC_GOT_TLSLD_HI:
+ case MCSymbolRefExpr::VK_PPC_GOT_TLSLD_HA:
case MCSymbolRefExpr::VK_PPC_TLSLD:
break;
}
@@ -503,9 +541,7 @@ void MCELFStreamer::EmitBundleUnlock() {
SD->setBundleLockState(MCSectionData::NotBundleLocked);
}
-void MCELFStreamer::FinishImpl() {
- EmitFrames(true);
-
+void MCELFStreamer::Flush() {
for (std::vector<LocalCommon>::const_iterator i = LocalCommons.begin(),
e = LocalCommons.end();
i != e; ++i) {
@@ -526,17 +562,23 @@ void MCELFStreamer::FinishImpl() {
SectData.setAlignment(ByteAlignment);
}
- this->MCObjectStreamer::FinishImpl();
+ LocalCommons.clear();
}
-void MCELFStreamer::EmitTCEntry(const MCSymbol &S) {
- // Creates a R_PPC64_TOC relocation
- MCObjectStreamer::EmitSymbolValue(&S, 8);
+
+void MCELFStreamer::FinishImpl() {
+ EmitFrames(NULL, true);
+
+ Flush();
+
+ this->MCObjectStreamer::FinishImpl();
}
-MCStreamer *llvm::createELFStreamer(MCContext &Context, MCAsmBackend &MAB,
- raw_ostream &OS, MCCodeEmitter *CE,
- bool RelaxAll, bool NoExecStack) {
- MCELFStreamer *S = new MCELFStreamer(Context, MAB, OS, CE);
+MCStreamer *llvm::createELFStreamer(MCContext &Context,
+ MCTargetStreamer *Streamer,
+ MCAsmBackend &MAB, raw_ostream &OS,
+ MCCodeEmitter *CE, bool RelaxAll,
+ bool NoExecStack) {
+ MCELFStreamer *S = new MCELFStreamer(Context, Streamer, MAB, OS, CE);
if (RelaxAll)
S->getAssembler().setRelaxAll(true);
if (NoExecStack)
generated by cgit v1.2.3 (git 2.25.1) at 2025-03-06 20:10:25 +0000