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| author | Frans Kaashoek <[email protected]> | 2019-07-22 14:30:45 -0400 |
|---|---|---|
| committer | Frans Kaashoek <[email protected]> | 2019-07-22 14:30:45 -0400 |
| commit | 5eab649255edc210c1e05ae62d2cb6fd0f328d8c (patch) | |
| tree | 23ae0a66f44ea1d892cf4725d1b5d229408d376f | |
| parent | c5d48db0456472d4edb3ac47763b23141839ca47 (diff) | |
| download | xv6-labs-5eab649255edc210c1e05ae62d2cb6fd0f328d8c.tar.gz xv6-labs-5eab649255edc210c1e05ae62d2cb6fd0f328d8c.tar.bz2 xv6-labs-5eab649255edc210c1e05ae62d2cb6fd0f328d8c.zip | |
Allocate 2 pages per proc, with the top one unmapped.
The page below the last proc is unmapped by default (because the
kernel doesn't map anything right below the kernel stacks).
| -rw-r--r-- | kernel/memlayout.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/memlayout.h b/kernel/memlayout.h index 13d1705..ef5c1e1 100644 --- a/kernel/memlayout.h +++ b/kernel/memlayout.h @@ -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) |