Implemented ELF header

build/elf/ProgramHeader.go

@@ -0,0 +1,37 @@
+package elf
+
+// ProgramHeaderSize is equal to the size of a program header in bytes.
+const ProgramHeaderSize = 56
+
+// ProgramHeader points to the executable part of our program.
+type ProgramHeader struct {
+	Type            ProgramType
+	Flags           ProgramFlags
+	Offset          int64
+	VirtualAddress  int64
+	PhysicalAddress int64
+	SizeInFile      int64
+	SizeInMemory    int64
+	Align           int64
+}
+
+type ProgramType int32
+
+const (
+	ProgramTypeNULL    ProgramType = 0
+	ProgramTypeLOAD    ProgramType = 1
+	ProgramTypeDYNAMIC ProgramType = 2
+	ProgramTypeINTERP  ProgramType = 3
+	ProgramTypeNOTE    ProgramType = 4
+	ProgramTypeSHLIB   ProgramType = 5
+	ProgramTypePHDR    ProgramType = 6
+	ProgramTypeTLS     ProgramType = 7
+)
+
+type ProgramFlags int32
+
+const (
+	ProgramFlagsExecutable ProgramFlags = 0x1
+	ProgramFlagsWritable   ProgramFlags = 0x2
+	ProgramFlagsReadable   ProgramFlags = 0x4
+)