proc_kcore(5) File Formats Manual proc_kcore(5)

/proc/kcore - physical memory

/proc/kcore
This file represents the physical memory of the system and is stored in the ELF core file format. With this pseudo-file, and an unstripped kernel (/usr/src/linux/vmlinux) binary, GDB can be used to examine the current state of any kernel data structures.
The total length of the file is the size of physical memory (RAM) plus 4 KiB.

proc(5)

2024-05-02 Linux man-pages 6.9.1