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If a symbol is used as tls, mark it as tls even if not declare as so. Probably

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fixes PR8659.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120076 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2010-11-24 02:19:40 +00:00
parent bcc3678a4a
commit 97551276c5
2 changed files with 54 additions and 2 deletions
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40
lib/MC/MCELFStreamer.cpp
View File

@ -144,6 +144,8 @@ private:
virtual void EmitInstToFragment(const MCInst &Inst);
virtual void EmitInstToData(const MCInst &Inst);
void fixSymbolsInTLSFixups(const MCExpr *expr);
struct LocalCommon {
MCSymbolData *SD;
uint64_t Size;
@ -450,6 +452,38 @@ void MCELFStreamer::EmitFileDirective(StringRef Filename) {
SD.setFlags(ELF_STT_File | ELF_STB_Local | ELF_STV_Default);
}
void MCELFStreamer::fixSymbolsInTLSFixups(const MCExpr *expr) {
switch (expr->getKind()) {
case MCExpr::Target: llvm_unreachable("Can't handle target exprs yet!");
case MCExpr::Constant:
break;
case MCExpr::Binary: {
const MCBinaryExpr *be = cast<MCBinaryExpr>(expr);
fixSymbolsInTLSFixups(be->getLHS());
fixSymbolsInTLSFixups(be->getRHS());
break;
}
case MCExpr::SymbolRef: {
const MCSymbolRefExpr &symRef = *cast<MCSymbolRefExpr>(expr);
MCSymbolRefExpr::VariantKind kind = symRef.getKind();
if (kind != MCSymbolRefExpr::VK_TLSGD &&
kind != MCSymbolRefExpr::VK_TLSLD &&
kind != MCSymbolRefExpr::VK_TLSLDM &&
kind != MCSymbolRefExpr::VK_ARM_TLSGD)
return;
MCSymbolData &SD = getAssembler().getOrCreateSymbolData(symRef.getSymbol());
SetType(SD, ELF::STT_TLS);
break;
}
case MCExpr::Unary:
fixSymbolsInTLSFixups(cast<MCUnaryExpr>(expr)->getSubExpr());
break;
}
}
void MCELFStreamer::EmitInstToFragment(const MCInst &Inst) {
MCInstFragment *IF = new MCInstFragment(Inst, getCurrentSectionData());
@ -463,6 +497,9 @@ void MCELFStreamer::EmitInstToFragment(const MCInst &Inst) {
getAssembler().getEmitter().EncodeInstruction(Inst, VecOS, Fixups);
VecOS.flush();
for (unsigned i = 0, e = Fixups.size(); i != e; ++i)
fixSymbolsInTLSFixups(Fixups[i].getValue());
IF->getCode() = Code;
IF->getFixups() = Fixups;
}
@ -476,6 +513,9 @@ void MCELFStreamer::EmitInstToData(const MCInst &Inst) {
getAssembler().getEmitter().EncodeInstruction(Inst, VecOS, Fixups);
VecOS.flush();
for (unsigned i = 0, e = Fixups.size(); i != e; ++i)
fixSymbolsInTLSFixups(Fixups[i].getValue());
// Add the fixups and data.
for (unsigned i = 0, e = Fixups.size(); i != e; ++i) {
Fixups[i].setOffset(Fixups[i].getOffset() + DF->getContents().size());

16
test/MC/ELF/tls.s
View File

@ -1,15 +1,27 @@
// RUN: llvm-mc -filetype=obj -triple x86_64-pc-linux-gnu %s -o - | elf-dump | FileCheck %s
// Test that foobar is of type STT_TLS.
// Test that foo and foobar is of type STT_TLS.
leaq foo@TLSGD(%rip), %rdi
.section .zed,"awT",@progbits
foobar:
.long 43
// CHECK: (('st_name', 0x00000001) # 'foobar'
// CHECK: (('st_name', 0x00000005) # 'foobar'
// CHECK-NEXT: ('st_bind', 0x00000000)
// CHECK-NEXT: ('st_type', 0x00000006)
// CHECK-NEXT: ('st_other', 0x00000000)
// CHECK-NEXT: ('st_shndx', 0x00000004)
// CHECK-NEXT: ('st_value', 0x00000000)
// CHECK-NEXT: ('st_size', 0x00000000)
// CHECK-NEXT: ),
// CHECK: (('st_name', 0x00000001) # 'foo'
// CHECK-NEXT: ('st_bind', 0x00000001)
// CHECK-NEXT: ('st_type', 0x00000006)
// CHECK-NEXT: ('st_other', 0x00000000)
// CHECK-NEXT: ('st_shndx', 0x00000000)
// CHECK-NEXT: ('st_value', 0x00000000)
// CHECK-NEXT: ('st_size', 0x00000000)
// CHECK-NEXT: ),