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diff --git a/sys/sys/systm.h b/sys/sys/systm.h
--- a/sys/sys/systm.h
+++ b/sys/sys/systm.h
@@ -359,11 +359,21 @@
int __result_use_check fueword(volatile const void *base, long *val);
int __result_use_check fueword32(volatile const void *base, int32_t *val);
int __result_use_check fueword64(volatile const void *base, int64_t *val);
+#ifdef __CHERI__
+int __result_use_check fueptr(volatile const void *base, intptr_t *val);
+#else
+#define fueptr(base, val) fueword((base), (long *)(val))
+#endif
__nodiscard int subyte(volatile void *base, int byte);
__nodiscard int suword(volatile void *base, long word);
__nodiscard int suword16(volatile void *base, int word);
__nodiscard int suword32(volatile void *base, int32_t word);
__nodiscard int suword64(volatile void *base, int64_t word);
+#ifdef __CHERI__
+__nodiscard int suptr(volatile void *base, intptr_t ptr);
+#else
+#define suptr(base, val) suword((base), (val))
+#endif
uint32_t casuword32(volatile uint32_t *base, uint32_t oldval, uint32_t newval);
u_long casuword(volatile u_long *p, u_long oldval, u_long newval);
int casueword32(volatile uint32_t *base, uint32_t oldval, uint32_t *oldvalp,

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