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| author | Frans Kaashoek <[email protected]> | 2022-08-12 13:22:10 -0400 |
|---|---|---|
| committer | Frans Kaashoek <[email protected]> | 2022-08-12 13:22:10 -0400 |
| commit | 899cc02660232092209a5db57b326ab7b49813dd (patch) | |
| tree | abde95c343fb06294fba1c30036a3d6564602693 /kernel/proc.c | |
| parent | 8f58cc7df99e9f697ca3843886802ecab5cb8991 (diff) | |
| download | xv6-labs-899cc02660232092209a5db57b326ab7b49813dd.tar.gz xv6-labs-899cc02660232092209a5db57b326ab7b49813dd.tar.bz2 xv6-labs-899cc02660232092209a5db57b326ab7b49813dd.zip | |
Experiment with being more precise setting permissions for user pages.
Growing adds R|W pages (without X). Exec() marks the stack only R|W.
Probably could setup permissions for text and data better if we call
ld with --no-omagic instead of -N.
Diffstat (limited to 'kernel/proc.c')
| -rw-r--r-- | kernel/proc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/proc.c b/kernel/proc.c index 580b3b6..0fa6a2c 100644 --- a/kernel/proc.c +++ b/kernel/proc.c @@ -264,7 +264,7 @@ growproc(int n) sz = p->sz; if(n > 0){ - if((sz = uvmalloc(p->pagetable, sz, sz + n)) == 0) { + if((sz = uvmalloc(p->pagetable, sz, sz + n, PTE_W)) == 0) { return -1; } } else if(n < 0){ |