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authorKimplul <kimi.h.kuparinen@gmail.com>2024-05-24 13:24:27 +0300
committerKimplul <kimi.h.kuparinen@gmail.com>2024-05-24 18:13:43 +0300
commitbc600ecc3bdf0f189861dfb840f70c2339a7a853 (patch)
treed9840b1dc1b865442a028c03ad7109ac67894f6e /common/canary.c
parent6a7073e5f262db9a4578ff00b5b28e34335564ce (diff)
downloadkmi-bc600ecc3bdf0f189861dfb840f70c2339a7a853.tar.gz
kmi-bc600ecc3bdf0f189861dfb840f70c2339a7a853.zip
rename common to src
+ I keep starting to type src and wondering why autocomplete won't work, I guess src is just uncounciously a better name
Diffstat (limited to 'common/canary.c')
-rw-r--r--common/canary.c42
1 files changed, 0 insertions, 42 deletions
diff --git a/common/canary.c b/common/canary.c
deleted file mode 100644
index 4f1f8ba..0000000
--- a/common/canary.c
+++ /dev/null
@@ -1,42 +0,0 @@
-/* SPDX-License-Identifier: copyleft-next-0.3.1 */
-/* Copyright 2023 Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
-
-#include <kmi/canary.h>
-#include <kmi/mem.h>
-
-/**
- * @file canary.c
- * Kernel stack canary implementation.
- */
-
-/** Typedef for canary value type. */
-typedef uint32_t canary_t;
-
-/** Canary magic value. */
-static const canary_t canary = 0xb00b1e5;
-
-/**
- * Helper for calculating the canary location of \p t.
- *
- * @param t \ref tcb to calculate canary position of.
- * @return Pointer to canary location, that is bottom of stack.
- * \todo This assumes that all stacks grow downwards. Unlikely to ever be
- * ported to a platform that doesn't abide by this, but keep it in mind anyway.
- */
-static canary_t *get_canary(struct tcb *t)
-{
- size_t s = order_size(KERNEL_STACK_PAGE_ORDER);
- return (canary_t *)align_down((uintptr_t)t, s);
-}
-
-void set_canary(struct tcb *t)
-{
- canary_t *c = get_canary(t);
- *c = canary;
-}
-
-bool check_canary(struct tcb *t)
-{
- canary_t *c = get_canary(t);
- return *c != canary;
-}