Where is the “Section to segment mapping” stored in ELF files?

Question

As part of trying to write a compiler completely from scratch, I\'m currently working on the part the handles ELF files.

After skimming through several articles and

Answer 1

I did a test according to the @Employed Russian.

readelf -l ./libandroid_servers.so

Elf file type is DYN (Shared object file)
Entry point 0x0
There are 6 program headers, starting at offset 52

Program Headers:
  Type           Offset   VirtAddr   PhysAddr   FileSiz MemSiz  Flg Align
  PHDR           0x000034 0x00000034 0x00000034 0x000c0 0x000c0 R   0x4
  LOAD           0x000000 0x00000000 0x00000000 0x0f830 0x0f830 R E 0x1000
  LOAD           0x010000 0x00010000 0x00010000 0x00cf4 0x011ac RW  0x1000
  DYNAMIC        0x010540 0x00010540 0x00010540 0x00130 0x00130 RW  0x4
  GNU_STACK      0x000000 0x00000000 0x00000000 0x00000 0x00000 RW  0
  EXIDX          0x00f2e8 0x0000f2e8 0x0000f2e8 0x00548 0x00548 R   0x4

 Section to Segment mapping:
  Segment Sections...
   00     
   01     .hash .dynsym .dynstr .rel.plt .rel.dyn .plt .text .rodata .ARM.extab .ARM.exidx 
   02     .init_array .fini_array .data.rel.ro .dynamic .got .data .bss 
   03     .dynamic 
   04     
   05     .ARM.exidx 

01 LOAD offset： 0x000000 fileSize 0x0f830
.ARM.exidx section end addr： hex(0x00f2e8 + 0x00548) = 0xf830

02 LOAD offset: 0x010000 fileSize: 0x00cf4
.init_array section begin addr： 10000h
.bss section end addr： hex(0x00f2e8 + 0 ) = 0x10cf4

You see the readelf surely print the sections in a segments by computes. They match well.