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[Object/ELF] Provide helpers for symbol types.

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These were, originally, in a different form in lld.
They can be reused for other tools, e.g. llvm-readobj.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239231 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Davide Italiano 2015-06-06 22:54:09 +00:00
parent 134cb22902
commit 86a28d87b1
1 changed files with 23 additions and 0 deletions
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23
include/llvm/Object/ELFTypes.h
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@ -154,6 +154,7 @@ struct Elf_Sym_Base<ELFType<TargetEndianness, true>> {
template <class ELFT>
struct Elf_Sym_Impl : Elf_Sym_Base<ELFT> {
using Elf_Sym_Base<ELFT>::st_info;
using Elf_Sym_Base<ELFT>::st_shndx;
using Elf_Sym_Base<ELFT>::st_other;
// These accessors and mutators correspond to the ELF32_ST_BIND,
@ -176,6 +177,28 @@ struct Elf_Sym_Impl : Elf_Sym_Base<ELFT> {
assert(v < 4 && "Invalid value for visibility");
st_other = (st_other & ~0x3) | v;
}
bool isAbsolute() const { return st_shndx == ELF::SHN_ABS; }
bool isCommon() const {
return !isUndefined() &&
!(st_shndx >= ELF::SHN_LORESERVE && st_shndx < ELF::SHN_ABS);
}
bool isDefined() const {
return !isUndefined() &&
(!(st_shndx >= ELF::SHN_LORESERVE &&
st_shndx <= ELF::SHN_HIRESERVE) ||
st_shndx == ELF::SHN_XINDEX);
}
bool isProcessorSpecific() const {
return st_shndx >= ELF::SHN_LOPROC && st_shndx <= ELF::SHN_HIPROC;
}
bool isOSSpecific() const {
return st_shndx >= ELF::SHN_LOOS && st_shndx <= ELF::SHN_HIOS;
}
bool isReserved() const {
return st_shndx > ELF::SHN_HIOS && st_shndx < ELF::SHN_ABS;
}
bool isUndefined() const { return st_shndx == ELF::SHN_UNDEF; }
};
/// Elf_Versym: This is the structure of entries in the SHT_GNU_versym section