Accessing Memory Addresses in Assembly

The File /proc/PID/maps shows a memory map of the process with PID.(on linux/unix(r)) systems
lets write a program which enters loop and doesn't terminate.
we'll see its memory layout

chaos@sheikhchillip:/mnt/e/builds/assembly$ uname -r
4.4.0-18362-Microsoft
chaos@sheikhchillip:/mnt/e/builds/assembly$ nasm -v
NASM version 2.14
chaos@sheikhchillip:/mnt/e/builds/assembly$ ld -v
GNU ld (GNU Binutils for Debian) 2.31.1
chaos@sheikhchillip:/mnt/e/builds/assembly$

enough about current system used to build.

*/********************************************************/*
section .data
correct: dq -1
section .text
global _start
_start:
jmp _start
*/********************************************************/*
;chaos@sheikhchillip:/mnt/e/builds/assembly$ nasm -felf64 mappings_loop.asm -o mappings.o
;chaos@sheikhchillip:/mnt/e/builds/assembly$ ls
;endianness.asm  hello2.o  hello.o             mappings.o      risc_cisc.asm  strlen2      strlen.asm
;hello           hello3    loader_start32.asm  print_call.asm  smpgdt.asm     strlen2.asm  strlen.o
;hello2          hello3.o  mappings_loop.asm   print_rax.asm   strlen         strlen2.o
;chaos@sheikhchillip:/mnt/e/builds/assembly$ ld -o mappings mappings.o
;chaos@sheikhchillip:/mnt/e/builds/assembly$ ls
;endianness.asm  hello2.o  hello.o             mappings_loop.asm  print_rax.asm  strlen       strlen2.o
;hello           hello3    loader_start32.asm  mappings.o         risc_cisc.asm  strlen2      strlen.asm
;hello2          hello3.o  mappings            print_call.asm     smpgdt.asm     strlen2.asm  strlen.o
;chaos@sheikhchillip:/mnt/e/builds/assembly$ ./mappings & [& is neccessary because otherwise shell might enter program loop]
;[1] 348
;chaos@sheikhchillip:/mnt/e/builds/assembly$ cat /proc/348/maps

MemRegAddrRng     Prms
;00400000-00401000 r--p 00000000 00:00 138053                     /mnt/e/builds/assembly/mappings
;00401000-00402000 r-xp 00001000 00:00 138053                     /mnt/e/builds/assembly/mappings
;00402000-00403000 rw-p 00002000 00:00 138053                     /mnt/e/builds/assembly/mappings
;7ffff42b6000-7ffff4ab6000 rw-p 00000000 00:00 0                  [stack]
;7ffff4e6d000-7ffff4e6e000 r-xp 00000000 00:00 0                  [vdso]

So, Hence We can see the memorymap, which is useful in many cases.