[PATCH] [Object/ELF] Provide symbol helpers

[Davide Italiano]

Yes, you're both right. I should have done this before.


http://reviews.llvm.org/D10264

Files:
  include/llvm/Object/ELFTypes.h

Index: include/llvm/Object/ELFTypes.h
===================================================================
--- include/llvm/Object/ELFTypes.h
+++ include/llvm/Object/ELFTypes.h
@@ -154,6 +154,7 @@
 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 +177,27 @@
     assert(v < 4 && "Invalid value for visibility");
     st_other = (st_other & ~0x3) | v;
   }
+
+  bool isAbsoluteSymbol() const { return st_shndx == ELF::SHN_ABS; }
+  bool isCommonSymbol() const {
+    return getType() == ELF::STT_COMMON || st_shndx == ELF::SHN_COMMON;
+  }
+  bool isDefinedSymbol() const {
+    return !isUndefinedSymbol() &&
+           (!(st_shndx >= ELF::SHN_LORESERVE &&
+              st_shndx <= ELF::SHN_HIRESERVE) ||
+            st_shndx == ELF::SHN_XINDEX);
+  }
+  bool isProcessorSpecificSymbol() const {
+    return st_shndx >= ELF::SHN_LOPROC && st_shndx <= ELF::SHN_HIPROC;
+  }
+  bool isOSSpecificSymbol() const {
+    return st_shndx >= ELF::SHN_LOOS && st_shndx <= ELF::SHN_HIOS;
+  }
+  bool isReservedSymbol() const {
+    return st_shndx > ELF::SHN_HIOS && st_shndx < ELF::SHN_ABS;
+  }
+  bool isUndefinedSymbol() const { return st_shndx == ELF::SHN_UNDEF; }
 };
 
 /// Elf_Versym: This is the structure of entries in the SHT_GNU_versym section

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