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Add support for gnu_indirect_function. 

llvm-svn: 146377
This commit is contained in:
Roman Divacky 2011-12-12 17:34:04 +00:00
parent a1a9e77122
commit 735cb8bcdc
5 changed files with 22 additions and 3 deletions
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1
llvm/include/llvm/Support/ELF.h
View File

@ -888,6 +888,7 @@ enum {
STT_TLS = 6, // Thread local data object
STT_LOOS = 7, // Lowest operating system-specific symbol type
STT_HIOS = 8, // Highest operating system-specific symbol type
STT_GNU_IFUNC = 10, // GNU indirect function
STT_LOPROC = 13, // Lowest processor-specific symbol type
STT_HIPROC = 15 // Highest processor-specific symbol type
};

4
llvm/lib/MC/MCELF.cpp
View File

@ -37,7 +37,7 @@ void MCELF::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);
Type == ELF::STT_TLS || Type == ELF::STT_GNU_IFUNC);
uint32_t OtherFlags = SD.getFlags() & ~(0xf << ELF_STT_Shift);
SD.setFlags(OtherFlags | (Type << ELF_STT_Shift));
@ -48,7 +48,7 @@ unsigned MCELF::GetType(const MCSymbolData &SD) {
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);
Type == ELF::STT_TLS || Type == ELF::STT_GNU_IFUNC);
return Type;
}

5
llvm/lib/MC/MCELFStreamer.cpp
View File

@ -130,7 +130,6 @@ void MCELFStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
case MCSA_WeakDefinition:
case MCSA_WeakDefAutoPrivate:
case MCSA_Invalid:
case MCSA_ELF_TypeIndFunction:
case MCSA_IndirectSymbol:
assert(0 && "Invalid symbol attribute for ELF!");
break;
@ -162,6 +161,10 @@ void MCELFStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
MCELF::SetType(SD, ELF::STT_FUNC);
break;
case MCSA_ELF_TypeIndFunction:
MCELF::SetType(SD, ELF::STT_GNU_IFUNC);
break;
case MCSA_ELF_TypeObject:
MCELF::SetType(SD, ELF::STT_OBJECT);
break;

1
llvm/lib/MC/MCParser/ELFAsmParser.cpp
View File

@ -476,6 +476,7 @@ bool ELFAsmParser::ParseDirectiveType(StringRef, SMLoc) {
.Case("common", MCSA_ELF_TypeCommon)
.Case("notype", MCSA_ELF_TypeNoType)
.Case("gnu_unique_object", MCSA_ELF_TypeGnuUniqueObject)
.Case("gnu_indirect_function", MCSA_ELF_TypeIndFunction)
.Default(MCSA_Invalid);
if (Attr == MCSA_Invalid)

14
llvm/test/MC/ELF/type.s
View File

@ -12,6 +12,10 @@ bar:
// Test that gnu_unique_object is accepted.
.type zed,@gnu_unique_object
ifunc:
.global ifunc
.type ifunc,@gnu_indirect_function
// CHECK: # Symbol 4
// CHECK-NEXT: (('st_name', 0x00000005) # 'bar'
// CHECK-NEXT: ('st_bind', 0x1)
@ -30,3 +34,13 @@ bar:
// CHECK-NEXT: ('st_value', 0x0000000000000000)
// CHECK-NEXT: ('st_size', 0x0000000000000000)
// CHECK-NEXT: ),
// CHECK-NEXT: # Symbol 6
// CHECK-NEXT: (('st_name', 0x00000009) # 'ifunc'
// CHECK-NEXT: ('st_bind', 0x1)
// CHECK-NEXT: ('st_type', 0xa)
// CHECK-NEXT: ('st_other', 0x00)
// CHECK-NEXT: ('st_shndx', 0x0001)
// CHECK-NEXT: ('st_value', 0x0000000000000000)
// CHECK-NEXT: ('st_size', 0x0000000000000000)
// CHECK-NEXT: ),