Implemented ELF header

build/elf/elf.go

@@ -0,0 +1,51 @@
+package elf
+
+import (
+	"encoding/binary"
+	"io"
+)
+
+const (
+	baseAddress  = 0x400000
+	programAlign = 16
+	sectionAlign = 16
+)
+
+// ELF64 represents an ELF 64-bit file.
+type ELF64 struct {
+	Header
+}
+
+// New creates a new 64-bit ELF binary.
+func New() *ELF64 {
+	elf := &ELF64{
+		Header: Header{
+			Magic:                       [4]byte{0x7F, 'E', 'L', 'F'},
+			Class:                       2,
+			Endianness:                  LittleEndian,
+			Version:                     1,
+			OSABI:                       0,
+			ABIVersion:                  0,
+			Type:                        TypeExecutable,
+			Architecture:                ArchitectureAMD64,
+			FileVersion:                 1,
+			EntryPointInMemory:          0,
+			ProgramHeaderOffset:         HeaderSize,
+			SectionHeaderOffset:         0, // TODO
+			Flags:                       0,
+			Size:                        HeaderSize,
+			ProgramHeaderEntrySize:      ProgramHeaderSize,
+			ProgramHeaderEntryCount:     0,
+			SectionHeaderEntrySize:      SectionHeaderSize,
+			SectionHeaderEntryCount:     0,
+			SectionNameStringTableIndex: 0,
+		},
+	}
+
+	return elf
+}
+
+// Write writes the ELF64 format to the given writer.
+func (elf *ELF64) Write(writer io.Writer) {
+	binary.Write(writer, binary.LittleEndian, &elf.Header)
+}