diff options
Diffstat (limited to 'lib/CodeGen/ELF.h')
| -rw-r--r-- | lib/CodeGen/ELF.h | 46 |
1 files changed, 43 insertions, 3 deletions
diff --git a/lib/CodeGen/ELF.h b/lib/CodeGen/ELF.h index bf43622a6f..0fa5dd7419 100644 --- a/lib/CodeGen/ELF.h +++ b/lib/CodeGen/ELF.h @@ -21,6 +21,7 @@ #ifndef CODEGEN_ELF_H #define CODEGEN_ELF_H +#include "llvm/CodeGen/MachineRelocation.h" #include "llvm/Support/DataTypes.h" #include <cstring> @@ -64,6 +65,36 @@ namespace llvm { EV_CURRENT = 1 }; + struct ELFHeader { + // e_machine - This field is the target specific value to emit as the + // e_machine member of the ELF header. + unsigned short e_machine; + + // e_flags - The machine flags for the target. This defaults to zero. + unsigned e_flags; + + // e_size - Holds the ELF header's size in bytes + unsigned e_ehsize; + + // Endianess and ELF Class (64 or 32 bits) + unsigned ByteOrder; + unsigned ElfClass; + + unsigned getByteOrder() const { return ByteOrder; } + unsigned getElfClass() const { return ElfClass; } + unsigned getSize() const { return e_ehsize; } + unsigned getMachine() const { return e_machine; } + unsigned getFlags() const { return e_flags; } + + ELFHeader(unsigned short machine, unsigned flags, + bool is64Bit, bool isLittleEndian) + : e_machine(machine), e_flags(flags) { + ByteOrder = is64Bit ? ELFCLASS64 : ELFCLASS32; + ElfClass = isLittleEndian ? ELFDATA2LSB : ELFDATA2MSB; + e_ehsize = is64Bit ? 64 : 52; + } + }; + /// 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. @@ -118,11 +149,11 @@ namespace llvm { // Special section indices. enum { - SHN_UNDEF = 0, // Undefined, missing, irrelevant, or meaningless + SHN_UNDEF = 0, // Undefined, missing, irrelevant SHN_LORESERVE = 0xff00, // Lowest reserved index SHN_LOPROC = 0xff00, // Lowest processor-specific index SHN_HIPROC = 0xff1f, // Highest processor-specific index - SHN_ABS = 0xfff1, // Symbol has absolute value; does not need relocation + SHN_ABS = 0xfff1, // Symbol has absolute value; no relocation SHN_COMMON = 0xfff2, // FORTRAN COMMON or C external global variables SHN_HIRESERVE = 0xffff // Highest reserved index }; @@ -134,6 +165,15 @@ namespace llvm { /// up for emission to the file. std::vector<unsigned char> SectionData; + /// Relocations - The relocations that we have encountered so far in this + /// section that we will need to convert to MachORelocation entries when + /// the file is written. + std::vector<MachineRelocation> Relocations; + + /// Section Header Size + static unsigned getSectionHdrSize(bool is64Bit) + { return is64Bit ? 64 : 40; } + 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) {} @@ -167,7 +207,7 @@ namespace llvm { STT_FILE = 4 }; - ELFSym(const GlobalValue *gv) : GV(gv), Value(0), + ELFSym(const GlobalValue *gv) : GV(gv), NameIdx(0), Value(0), Size(0), Info(0), Other(0), SectionIdx(ELFSection::SHN_UNDEF) {} |