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
)