public boolean isInvalidOffset() {
		return p_offset < 0 || (header.is32Bit() && p_offset == ElfConstants.ELF32_INVALID_OFFSET);
	}
Return true if this program header's offset is invalid.

@return true if this program header's offset is invalid
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/elf/ElfProgramHeader.java