Remove elf specific info from ELFWriter.h to Elf.h. Code cleanup and more comments added

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72982 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 83 deletions

diff --git a/lib/CodeGen/ELFWriter.h b/lib/CodeGen/ELFWriter.h
index 63d692b..0389185 100644
--- a/lib/CodeGen/ELFWriter.h
+++ b/lib/CodeGen/ELFWriter.h
@@ -15,6 +15,7 @@
 #define ELFWRITER_H
 
 #include "llvm/CodeGen/MachineFunctionPass.h"
+#include "ELF.h"
 #include <list>
 #include <map>
 
@@ -82,10 +83,8 @@ namespace llvm {
     /// doInitialization - Emit the file header and all of the global variables
     /// for the module to the ELF file.
     bool doInitialization(Module &M);
-
     bool runOnMachineFunction(MachineFunction &MF);
 
-
     /// doFinalization - Now that the module has been completely processed, emit
     /// the ELF file to 'O'.
     bool doFinalization(Module &M);
@@ -96,53 +95,6 @@ namespace llvm {
     // as well!).
     DataBuffer FileHeader;
 
-    /// ELFSection - This struct contains information about each section that is
-    /// emitted to the file.  This is eventually turned into the section header
-    /// table at the end of the file.
-    struct ELFSection {
-      std::string Name;       // Name of the section.
-      unsigned NameIdx;       // Index in .shstrtab of name, once emitted.
-      unsigned Type;
-      unsigned Flags;
-      uint64_t Addr;
-      unsigned Offset;
-      unsigned Size;
-      unsigned Link;
-      unsigned Info;
-      unsigned Align;
-      unsigned EntSize;
-
-      /// SectionIdx - The number of the section in the Section Table.
-      ///
-      unsigned short SectionIdx;
-
-      /// SectionData - The actual data for this section which we are building
-      /// up for emission to the file.
-      DataBuffer SectionData;
-
-      enum { SHT_NULL = 0, SHT_PROGBITS = 1, SHT_SYMTAB = 2, SHT_STRTAB = 3,
-             SHT_RELA = 4, SHT_HASH = 5, SHT_DYNAMIC = 6, SHT_NOTE = 7,
-             SHT_NOBITS = 8, SHT_REL = 9, SHT_SHLIB = 10, SHT_DYNSYM = 11 };
-      enum { SHN_UNDEF = 0, SHN_ABS = 0xFFF1, SHN_COMMON = 0xFFF2 };
-      enum {   // SHF - ELF Section Header Flags
-        SHF_WRITE            = 1 << 0, // Writable
-        SHF_ALLOC            = 1 << 1, // Mapped into the process addr space
-        SHF_EXECINSTR        = 1 << 2, // Executable
-        SHF_MERGE            = 1 << 4, // Might be merged if equal
-        SHF_STRINGS          = 1 << 5, // Contains null-terminated strings
-        SHF_INFO_LINK        = 1 << 6, // 'sh_info' contains SHT index
-        SHF_LINK_ORDER       = 1 << 7, // Preserve order after combining
-        SHF_OS_NONCONFORMING = 1 << 8, // nonstandard OS support required
-        SHF_GROUP            = 1 << 9, // Section is a member of a group
-        SHF_TLS              = 1 << 10 // Section holds thread-local data
-      };
-
-      ELFSection(const std::string &name)
-        : Name(name), Type(0), Flags(0), Addr(0), Offset(0), Size(0),
-          Link(0), Info(0), Align(0), EntSize(0) {
-      }
-    };
-
     /// SectionList - This is the list of sections that we have emitted to the
     /// file.  Once the file has been completely built, the section header table
     /// is constructed from this info.
@@ -165,13 +117,13 @@ namespace llvm {
       SN->SectionIdx = NumSections++;
       SN->Type = Type;
       SN->Flags = Flags;
+      SN->Link = ELFSection::SHN_UNDEF;
       return *SN;
     }
 
     ELFSection &getTextSection() {
-      return getSection(".text", ELFWriter::ELFSection::SHT_PROGBITS,
-                        ELFWriter::ELFSection::SHF_EXECINSTR |
-                        ELFWriter::ELFSection::SHF_ALLOC);
+      return getSection(".text", ELFSection::SHT_PROGBITS,
+                        ELFSection::SHF_EXECINSTR | ELFSection::SHF_ALLOC);
     }
 
     ELFSection &getDataSection() {
@@ -183,34 +135,6 @@ namespace llvm {
                         ELFSection::SHF_WRITE | ELFSection::SHF_ALLOC);
     }
 
-    /// ELFSym - This struct contains information about each symbol that is
-    /// added to logical symbol table for the module.  This is eventually
-    /// turned into a real symbol table in the file.
-    struct ELFSym {
-      const GlobalValue *GV;    // The global value this corresponds to.
-      unsigned NameIdx;         // Index in .strtab of name, once emitted.
-      uint64_t Value;
-      unsigned Size;
-      unsigned char Info;
-      unsigned char Other;
-      unsigned short SectionIdx;
-
-      enum { STB_LOCAL = 0, STB_GLOBAL = 1, STB_WEAK = 2 };
-      enum { STT_NOTYPE = 0, STT_OBJECT = 1, STT_FUNC = 2, STT_SECTION = 3,
-             STT_FILE = 4 };
-      ELFSym(const GlobalValue *gv) : GV(gv), Value(0), Size(0), Info(0),
-                                      Other(0), SectionIdx(0) {}
-
-      void SetBind(unsigned X) {
-        assert(X == (X & 0xF) && "Bind value out of range!");
-        Info = (Info & 0x0F) | (X << 4);
-      }
-      void SetType(unsigned X) {
-        assert(X == (X & 0xF) && "Type value out of range!");
-        Info = (Info & 0xF0) | X;
-      }
-    };
-
     /// SymbolTable - This is the list of symbols we have emitted to the file.
     /// This actually gets rearranged before emission to the file (to put the
     /// local symbols first in the list).
@@ -220,9 +144,9 @@ namespace llvm {
     // (e.g. the location of the section table).  These members keep track of
     // the offset in ELFHeader of these various pieces to update and other
     // locations in the file.
-    unsigned ELFHeader_e_shoff_Offset;     // e_shoff    in ELF header.
-    unsigned ELFHeader_e_shstrndx_Offset;  // e_shstrndx in ELF header.
-    unsigned ELFHeader_e_shnum_Offset;     // e_shnum    in ELF header.
+    unsigned ELFHdr_e_shoff_Offset;     // e_shoff    in ELF header.
+    unsigned ELFHdr_e_shstrndx_Offset;  // e_shstrndx in ELF header.
+    unsigned ELFHdr_e_shnum_Offset;     // e_shnum    in ELF header.
   private:
     void EmitGlobal(GlobalVariable *GV);