Object: Add isSymbolAbsolute and getSymbolSection.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142317 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 88 insertions, 0 deletions

diff --git a/lib/Object/COFFObjectFile.cpp b/lib/Object/COFFObjectFile.cpp
index 0859bca..1335652 100644
--- a/lib/Object/COFFObjectFile.cpp
+++ b/lib/Object/COFFObjectFile.cpp
@@ -268,6 +268,28 @@ error_code COFFObjectFile::isSymbolInternal(DataRefImpl Symb,
   return object_error::success;
 }
 
+error_code COFFObjectFile::isSymbolAbsolute(DataRefImpl Symb,
+                                            bool &Result) const {
+  const coff_symbol *symb = toSymb(Symb);
+  Result = symb->SectionNumber == COFF::IMAGE_SYM_ABSOLUTE;
+  return object_error::success;
+}
+
+error_code COFFObjectFile::getSymbolSection(DataRefImpl Symb,
+                                            section_iterator &Result) const {
+  const coff_symbol *symb = toSymb(Symb);
+  if (symb->SectionNumber <= COFF::IMAGE_SYM_UNDEFINED)
+    Result = end_sections();
+  else {
+    const coff_section *sec;
+    if (error_code ec = getSection(symb->SectionNumber, sec)) return ec;
+    DataRefImpl Sec;
+    Sec.p = reinterpret_cast<uintptr_t>(sec);
+    Result = section_iterator(SectionRef(Sec, this));
+  }
+  return object_error::success;
+}
+
 error_code COFFObjectFile::getSectionNext(DataRefImpl Sec,
                                           SectionRef &Result) const {
   const coff_section *sec = toSec(Sec);
diff --git a/lib/Object/ELFObjectFile.cpp b/lib/Object/ELFObjectFile.cpp
index a3c8248..a5e3910 100644
--- a/lib/Object/ELFObjectFile.cpp
+++ b/lib/Object/ELFObjectFile.cpp
@@ -333,6 +333,9 @@ protected:
   virtual error_code isSymbolGlobal(DataRefImpl Symb, bool &Res) const;
   virtual error_code isSymbolWeak(DataRefImpl Symb, bool &Res) const;
   virtual error_code getSymbolType(DataRefImpl Symb, SymbolRef::Type &Res) const;
+  virtual error_code isSymbolAbsolute(DataRefImpl Symb, bool &Res) const;
+  virtual error_code getSymbolSection(DataRefImpl Symb,
+                                      section_iterator &Res) const;
 
   virtual error_code getSectionNext(DataRefImpl Sec, SectionRef &Res) const;
   virtual error_code getSectionName(DataRefImpl Sec, StringRef &Res) const;
@@ -655,6 +658,32 @@ error_code ELFObjectFile<target_endianness, is64Bits>
 
 template<support::endianness target_endianness, bool is64Bits>
 error_code ELFObjectFile<target_endianness, is64Bits>
+                        ::isSymbolAbsolute(DataRefImpl Symb, bool &Res) const {
+  validateSymbol(Symb);
+  const Elf_Sym  *symb = getSymbol(Symb);
+  Res = symb->st_shndx == ELF::SHN_ABS;
+  return object_error::success;
+}
+
+template<support::endianness target_endianness, bool is64Bits>
+error_code ELFObjectFile<target_endianness, is64Bits>
+                        ::getSymbolSection(DataRefImpl Symb,
+                                           section_iterator &Res) const {
+  validateSymbol(Symb);
+  const Elf_Sym  *symb = getSymbol(Symb);
+  const Elf_Shdr *sec = getSection(symb);
+  if (!sec)
+    Res = end_sections();
+  else {
+    DataRefImpl Sec;
+    Sec.p = reinterpret_cast<intptr_t>(sec);
+    Res = section_iterator(SectionRef(Sec, this));
+  }
+  return object_error::success;
+}
+
+template<support::endianness target_endianness, bool is64Bits>
+error_code ELFObjectFile<target_endianness, is64Bits>
                         ::isSymbolInternal(DataRefImpl Symb,
                                            bool &Result) const {
   validateSymbol(Symb);
diff --git a/lib/Object/MachOObjectFile.cpp b/lib/Object/MachOObjectFile.cpp
index c757dd3..472e072 100644
--- a/lib/Object/MachOObjectFile.cpp
+++ b/lib/Object/MachOObjectFile.cpp
@@ -242,6 +242,43 @@ error_code MachOObjectFile::isSymbolWeak(DataRefImpl Symb, bool &Res) const {
   return object_error::success;
 }
 
+error_code MachOObjectFile::isSymbolAbsolute(DataRefImpl Symb, bool &Res) const{
+  uint8_t n_type;
+  if (MachOObj->is64Bit()) {
+    InMemoryStruct<macho::Symbol64TableEntry> Entry;
+    getSymbol64TableEntry(Symb, Entry);
+    n_type = Entry->Type;
+  } else {
+    InMemoryStruct<macho::SymbolTableEntry> Entry;
+    getSymbolTableEntry(Symb, Entry);
+    n_type = Entry->Type;
+  }
+
+  Res = (n_type & MachO::NlistMaskType) == MachO::NListTypeAbsolute;
+  return object_error::success;
+}
+
+error_code MachOObjectFile::getSymbolSection(DataRefImpl Symb,
+                                             section_iterator &Res) const {
+  uint8_t index;
+  if (MachOObj->is64Bit()) {
+    InMemoryStruct<macho::Symbol64TableEntry> Entry;
+    getSymbol64TableEntry(Symb, Entry);
+    index = Entry->SectionIndex;
+  } else {
+    InMemoryStruct<macho::SymbolTableEntry> Entry;
+    getSymbolTableEntry(Symb, Entry);
+    index = Entry->SectionIndex;
+  }
+
+  if (index == 0)
+    Res = end_sections();
+  else
+    Res = section_iterator(SectionRef(Sections[index], this));
+
+  return object_error::success;
+}
+
 error_code MachOObjectFile::getSymbolType(DataRefImpl Symb,
                                           SymbolRef::Type &Res) const {
   uint8_t n_type;