ilo-pona/xv6-65oo2
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Activity

Allocate 2 pages per proc, with the top one unmapped.

Browse source 
The page below the last proc is unmapped by default (because the
kernel doesn't map anything right below the kernel stacks).
This commit is contained in:
Frans Kaashoek 2019-07-22 14:30:45 -04:00
parent c5d48db045
commit 5eab649255
1 changed files with 1 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
kernel/memlayout.h
View file

@ -53,4 +53,4 @@
// map the trampoline page to the highest address,
// in both user and kernel space.
#define TRAMPOLINE (MAXVA - PGSIZE)
#define KSTACK(p) ((TRAMPOLINE-PGSIZE)-p*2*PGSIZE)
#define KSTACK(p) (TRAMPOLINE - (p+1)* 2*PGSIZE)