title: What is p_align in elf header?
body: <p>i am studying reverse engineering.</p>
  <pre><code>readelf something
  Program Headers:
    Type           Offset   VirtAddr           PhysAddr           FileSiz  MemSiz   Flg Align
    PHDR           0x000040 0x0000000000400040 0x0000000000400040 0x0001f8 0x0001f8 R   0x8
    INTERP         0x000238 0x0000000000400238 0x0000000000400238 0x00001c 0x00001c R   0x1
        [Requesting program interpreter: /lib64/ld-linux-x86-64.so.2]
    LOAD           0x000000 0x0000000000400000 0x0000000000400000 0x0006f0 0x0006f0 R E 0x200000
    LOAD           0x000e10 0x0000000000600e10 0x0000000000600e10 0x000220 0x000228 RW  0x200000
    DYNAMIC        0x000e20 0x0000000000600e20 0x0000000000600e20 0x0001d0 0x0001d0 RW  0x8
    NOTE           0x000254 0x0000000000400254 0x0000000000400254 0x000044 0x000044 R   0x4
    GNU_EH_FRAME   0x0005b4 0x00000000004005b4 0x00000000004005b4 0x00003c 0x00003c R   0x4
    GNU_STACK      0x000000 0x0000000000000000 0x0000000000000000 0x000000 0x000000 RW  0x10
    GNU_RELRO      0x000e10 0x0000000000600e10 0x0000000000600e10 0x0001f0 0x0001f0 R   0x1
  
  </code></pre>
  <p>in here.
  What does mean Align column?</p>
  <p>i read man(5) elf.h and some docs, but i still don't know exactly it.
  and there are some questions about this in stack overflow but there aren't answer.</p>
  <p>could explain it to me?</p>