diff options
Diffstat (limited to 'include/linux/execmem.h')
| -rw-r--r-- | include/linux/execmem.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/include/linux/execmem.h b/include/linux/execmem.h index 32cef1144117..dfdf19f8a5e8 100644 --- a/include/linux/execmem.h +++ b/include/linux/execmem.h @@ -46,9 +46,11 @@ enum execmem_type { /** * enum execmem_range_flags - options for executable memory allocations * @EXECMEM_KASAN_SHADOW: allocate kasan shadow + * @EXECMEM_ROX_CACHE: allocations should use ROX cache of huge pages */ enum execmem_range_flags { EXECMEM_KASAN_SHADOW = (1 << 0), + EXECMEM_ROX_CACHE = (1 << 1), }; /** @@ -123,6 +125,27 @@ void *execmem_alloc(enum execmem_type type, size_t size); */ void execmem_free(void *ptr); +/** + * execmem_update_copy - copy an update to executable memory + * @dst: destination address to update + * @src: source address containing the data + * @size: how many bytes of memory shold be copied + * + * Copy @size bytes from @src to @dst using text poking if the memory at + * @dst is read-only. + * + * Return: a pointer to @dst or NULL on error + */ +void *execmem_update_copy(void *dst, const void *src, size_t size); + +/** + * execmem_is_rox - check if execmem is read-only + * @type - the execmem type to check + * + * Return: %true if the @type is read-only, %false if it's writable + */ +bool execmem_is_rox(enum execmem_type type); + #if defined(CONFIG_EXECMEM) && !defined(CONFIG_ARCH_WANTS_EXECMEM_LATE) void execmem_init(void); #else |