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Mark labels declared in tls sections as STT_TLS. This matches the behavior of

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gas.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118818 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2010-11-11 19:04:55 +00:00
parent 60f923c5e2
commit e1a2587ee2
3 changed files with 52 additions and 33 deletions
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69
lib/MC/MCELFStreamer.cpp
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@ -35,6 +35,38 @@ using namespace llvm;
namespace {
static void SetBinding(MCSymbolData &SD, unsigned Binding) {
assert(Binding == ELF::STB_LOCAL || Binding == ELF::STB_GLOBAL ||
Binding == ELF::STB_WEAK);
uint32_t OtherFlags = SD.getFlags() & ~(0xf << ELF_STB_Shift);
SD.setFlags(OtherFlags | (Binding << ELF_STB_Shift));
}
static unsigned GetBinding(const MCSymbolData &SD) {
uint32_t Binding = (SD.getFlags() & (0xf << ELF_STB_Shift)) >> ELF_STB_Shift;
assert(Binding == ELF::STB_LOCAL || Binding == ELF::STB_GLOBAL ||
Binding == ELF::STB_WEAK);
return Binding;
}
static void SetType(MCSymbolData &SD, unsigned Type) {
assert(Type == ELF::STT_NOTYPE || Type == ELF::STT_OBJECT ||
Type == ELF::STT_FUNC || Type == ELF::STT_SECTION ||
Type == ELF::STT_FILE || Type == ELF::STT_COMMON ||
Type == ELF::STT_TLS);
uint32_t OtherFlags = SD.getFlags() & ~(0xf << ELF_STT_Shift);
SD.setFlags(OtherFlags | (Type << ELF_STT_Shift));
}
static void SetVisibility(MCSymbolData &SD, unsigned Visibility) {
assert(Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_INTERNAL ||
Visibility == ELF::STV_HIDDEN || Visibility == ELF::STV_PROTECTED);
uint32_t OtherFlags = SD.getFlags() & ~(0xf << ELF_STV_Shift);
SD.setFlags(OtherFlags | (Visibility << ELF_STV_Shift));
}
class MCELFStreamer : public MCObjectStreamer {
public:
MCELFStreamer(MCContext &Context, TargetAsmBackend &TAB,
@ -166,6 +198,11 @@ void MCELFStreamer::EmitLabel(MCSymbol *Symbol) {
MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol);
const MCSectionELF &Section =
static_cast<const MCSectionELF&>(Symbol->getSection());
if (Section.getFlags() & MCSectionELF::SHF_TLS)
SetType(SD, ELF::STT_TLS);
// FIXME: This is wasteful, we don't necessarily need to create a data
// fragment. Instead, we should mark the symbol as pointing into the data
// fragment if it exists, otherwise we should just queue the label and set its
@ -262,38 +299,6 @@ void MCELFStreamer::EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) {
Alias->setVariableValue(Value);
}
static void SetBinding(MCSymbolData &SD, unsigned Binding) {
assert(Binding == ELF::STB_LOCAL || Binding == ELF::STB_GLOBAL ||
Binding == ELF::STB_WEAK);
uint32_t OtherFlags = SD.getFlags() & ~(0xf << ELF_STB_Shift);
SD.setFlags(OtherFlags | (Binding << ELF_STB_Shift));
}
static unsigned GetBinding(const MCSymbolData &SD) {
uint32_t Binding = (SD.getFlags() & (0xf << ELF_STB_Shift)) >> ELF_STB_Shift;
assert(Binding == ELF::STB_LOCAL || Binding == ELF::STB_GLOBAL ||
Binding == ELF::STB_WEAK);
return Binding;
}
static void SetType(MCSymbolData &SD, unsigned Type) {
assert(Type == ELF::STT_NOTYPE || Type == ELF::STT_OBJECT ||
Type == ELF::STT_FUNC || Type == ELF::STT_SECTION ||
Type == ELF::STT_FILE || Type == ELF::STT_COMMON ||
Type == ELF::STT_TLS);
uint32_t OtherFlags = SD.getFlags() & ~(0xf << ELF_STT_Shift);
SD.setFlags(OtherFlags | (Type << ELF_STT_Shift));
}
static void SetVisibility(MCSymbolData &SD, unsigned Visibility) {
assert(Visibility == ELF::STV_DEFAULT || Visibility == ELF::STV_INTERNAL ||
Visibility == ELF::STV_HIDDEN || Visibility == ELF::STV_PROTECTED);
uint32_t OtherFlags = SD.getFlags() & ~(0xf << ELF_STV_Shift);
SD.setFlags(OtherFlags | (Visibility << ELF_STV_Shift));
}
void MCELFStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
MCSymbolAttr Attribute) {
// Indirect symbols are handled differently, to match how 'as' handles

1
lib/MC/MCParser/AsmParser.cpp
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@ -193,7 +193,6 @@ private:
/// ParseDirectiveSymbolAttribute - Parse a directive like ".globl" which
/// accepts a single symbol (which should be a label or an external).
bool ParseDirectiveSymbolAttribute(MCSymbolAttr Attr);
bool ParseDirectiveELFType(); // ELF specific ".type"
bool ParseDirectiveComm(bool IsLocal); // ".comm" and ".lcomm"

15
test/MC/ELF/tls.s Normal file
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@ -0,0 +1,15 @@
// 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.
.section .zed,"awT",@progbits
foobar:
.long 43
// CHECK: (('st_name', 0x00000001) # '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)