VM_MAP_MAX(9)

✨ VM_MAP_MAX 💅

okay so bestie, we're in section 9 of the Kernel Developer's Manual — that's the kernel developer zone, very main character, very "i read source for fun" energy. and today's topic? three lil functions that just... tell you stuff about a map. that's it. that's the whole job. and honestly? iconic for that. 🎀

🌸 NAME 🌸

vm_map_max, vm_map_min, vm_map_pmap — return map properties

like. they return properties. of a map. no notes. 👑

✨ SYNOPSIS ✨

first you gotta pull in the lore:

#include <sys/param.h>
#include <vm/vm.h>
#include <vm/vm_map.h>

then the three besties themselves:

vm_offset_t
vm_map_max(vm_map_t map);

vm_offset_t
vm_map_min(vm_map_t map);

pmap_t
vm_map_pmap(vm_map_t map);

no cap, that's the whole synopsis. short and slay. 💅

🦋 DESCRIPTION 🦋

okay so let's break it down, one function at a time, because each one is giving something different:

• vm_map_max() — returns the upper address bound of the map map. that's it. the top of the vibe. the ceiling, fr fr. ⭐
• vm_map_min() — returns the lower address bound of the map map. the floor. the basement. the bottom of the map's little world. 🌈
• vm_map_pmap() — returns a pointer to the physical map associated with the virtual map map. so the virtual map has a physical bestie and this function is the wingman that introduces you. 🫶

and yes, all three of them take map, which is a vm_map_t. three functions, one argument, zero drama. we love a consistent queen. 💜

👑 SEE ALSO 👑

if you're obsessed (and you are, don't lie) go read these next:

• pmap(9)
• vm_map(9)

🎀 AUTHORS 🎀

this manual page was written by Bruce M Simpson <bms@spc.org>. thank you for your service king, genuinely. 🙈

and that's the whole page bestie — no crumbs left. this lil gem came to you from Debian, dated July 19, 2003, filed under VM_MAP_MAX(9). oldie but a goodie, lowkey timeless. bye bye, go read vm_map(9) next 💖✨