Revert "[llvm-objcopy] Add support for --strip-sections to remove all section headers leaving only program headers and loadable segment data"

This reverts commit rL315412

llvm-svn: 315417

1 files changed, 17 insertions, 28 deletions

diff --git a/llvm/tools/llvm-objcopy/Object.cpp b/llvm/tools/llvm-objcopy/Object.cpp
index 797d8f961e4..2bd3aa16f0b 100644
--- a/llvm/tools/llvm-objcopy/Object.cpp
+++ b/llvm/tools/llvm-objcopy/Object.cpp
@@ -575,20 +575,14 @@ void Object<ELFT>::writeHeader(FileOutputBuffer &Out) const {
   Ehdr.e_version = Version;
   Ehdr.e_entry = Entry;
   Ehdr.e_phoff = sizeof(Elf_Ehdr);
+  Ehdr.e_shoff = SHOffset;
   Ehdr.e_flags = Flags;
   Ehdr.e_ehsize = sizeof(Elf_Ehdr);
   Ehdr.e_phentsize = sizeof(Elf_Phdr);
   Ehdr.e_phnum = Segments.size();
   Ehdr.e_shentsize = sizeof(Elf_Shdr);
-  if (WriteSectionHeaders) {
-    Ehdr.e_shoff = SHOffset;
-    Ehdr.e_shnum = Sections.size() + 1;
-    Ehdr.e_shstrndx = SectionNames->Index;
-  } else {
-    Ehdr.e_shoff = 0;
-    Ehdr.e_shnum = 0;
-    Ehdr.e_shstrndx = 0;
-  }
+  Ehdr.e_shnum = Sections.size() + 1;
+  Ehdr.e_shstrndx = SectionNames->Index;
 }
 
 template <class ELFT>
@@ -639,10 +633,12 @@ void Object<ELFT>::removeSections(
   if (SymbolTable != nullptr && ToRemove(*SymbolTable))
     SymbolTable = nullptr;
   if (ToRemove(*SectionNames)) {
-    if (WriteSectionHeaders)
-      error("Cannot remove " + SectionNames->Name +
-            " because it is the section header string table.");
-    SectionNames = nullptr;
+    // Right now llvm-objcopy always outputs section headers. This will not
+    // always be the case. Eventully the section header table will become
+    // optional and if no section header is output then there dosn't need to be
+    // a section header string table.
+    error("Cannot remove " + SectionNames->Name +
+          " because it is the section header string table.");
   }
   // Now make sure there are no remaining references to the sections that will
   // be removed. Sometimes it is impossible to remove a reference so we emit
@@ -736,34 +732,29 @@ template <class ELFT> void ELFObject<ELFT>::assignOffsets() {
     }
   }
 
-  if (this->WriteSectionHeaders) {
-    Offset = alignTo(Offset, sizeof(typename ELFT::Addr));
-  }
+  Offset = alignTo(Offset, sizeof(typename ELFT::Addr));
   this->SHOffset = Offset;
 }
 
 template <class ELFT> size_t ELFObject<ELFT>::totalSize() const {
   // We already have the section header offset so we can calculate the total
   // size by just adding up the size of each section header.
-  auto NullSectionSize = this->WriteSectionHeaders ? sizeof(Elf_Shdr) : 0;
   return this->SHOffset + this->Sections.size() * sizeof(Elf_Shdr) +
-         NullSectionSize;
+         sizeof(Elf_Shdr);
 }
 
 template <class ELFT> void ELFObject<ELFT>::write(FileOutputBuffer &Out) const {
   this->writeHeader(Out);
   this->writeProgramHeaders(Out);
   this->writeSectionData(Out);
-  if (this->WriteSectionHeaders)
-    this->writeSectionHeaders(Out);
+  this->writeSectionHeaders(Out);
 }
 
 template <class ELFT> void ELFObject<ELFT>::finalize() {
   // Make sure we add the names of all the sections.
-  if (this->SectionNames != nullptr)
-    for (const auto &Section : this->Sections) {
-      this->SectionNames->addString(Section->Name);
-    }
+  for (const auto &Section : this->Sections) {
+    this->SectionNames->addString(Section->Name);
+  }
   // Make sure we add the names of all the symbols.
   if (this->SymbolTable != nullptr)
     this->SymbolTable->addSymbolNames();
@@ -772,16 +763,14 @@ template <class ELFT> void ELFObject<ELFT>::finalize() {
   assignOffsets();
 
   // Finalize SectionNames first so that we can assign name indexes.
-  if (this->SectionNames != nullptr)
-    this->SectionNames->finalize();
+  this->SectionNames->finalize();
   // Finally now that all offsets and indexes have been set we can finalize any
   // remaining issues.
   uint64_t Offset = this->SHOffset + sizeof(Elf_Shdr);
   for (auto &Section : this->Sections) {
     Section->HeaderOffset = Offset;
     Offset += sizeof(Elf_Shdr);
-    if (this->WriteSectionHeaders)
-      Section->NameIndex = this->SectionNames->findIndex(Section->Name);
+    Section->NameIndex = this->SectionNames->findIndex(Section->Name);
     Section->finalize();
   }
 }