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-rw-r--r--kernel/exec.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/exec.c b/kernel/exec.c
index d62d29d..09b4bdc 100644
--- a/kernel/exec.c
+++ b/kernel/exec.c
@@ -65,6 +65,7 @@ exec(char *path, char **argv)
uint64 oldsz = p->sz;
// Allocate two pages at the next page boundary.
+ // Make the first inaccessible as a stack guard.
// Use the second as the user stack.
sz = PGROUNDUP(sz);
uint64 sz1;