diff options
Diffstat (limited to 'include/linux/execmem.h')
| -rw-r--r-- | include/linux/execmem.h | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/include/linux/execmem.h b/include/linux/execmem.h index 96fc59258467..32cef1144117 100644 --- a/include/linux/execmem.h +++ b/include/linux/execmem.h @@ -5,6 +5,14 @@ #include <linux/types.h> #include <linux/moduleloader.h> +#if (defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)) && \ + !defined(CONFIG_KASAN_VMALLOC) +#include <linux/kasan.h> +#define MODULE_ALIGN (PAGE_SIZE << KASAN_SHADOW_SCALE_SHIFT) +#else +#define MODULE_ALIGN PAGE_SIZE +#endif + /** * enum execmem_type - types of executable memory ranges * @@ -22,6 +30,7 @@ * @EXECMEM_KPROBES: parameters for kprobes * @EXECMEM_FTRACE: parameters for ftrace * @EXECMEM_BPF: parameters for BPF + * @EXECMEM_MODULE_DATA: parameters for module data sections * @EXECMEM_TYPE_MAX: */ enum execmem_type { @@ -30,22 +39,38 @@ enum execmem_type { EXECMEM_KPROBES, EXECMEM_FTRACE, EXECMEM_BPF, + EXECMEM_MODULE_DATA, EXECMEM_TYPE_MAX, }; /** + * enum execmem_range_flags - options for executable memory allocations + * @EXECMEM_KASAN_SHADOW: allocate kasan shadow + */ +enum execmem_range_flags { + EXECMEM_KASAN_SHADOW = (1 << 0), +}; + +/** * struct execmem_range - definition of an address space suitable for code and * related data allocations * @start: address space start * @end: address space end (inclusive) + * @fallback_start: start of the secondary address space range for fallback + * allocations on architectures that require it + * @fallback_end: start of the secondary address space (inclusive) * @pgprot: permissions for memory in this address space * @alignment: alignment required for text allocations + * @flags: options for memory allocations for this range */ struct execmem_range { unsigned long start; unsigned long end; + unsigned long fallback_start; + unsigned long fallback_end; pgprot_t pgprot; unsigned int alignment; + enum execmem_range_flags flags; }; /** @@ -82,6 +107,9 @@ struct execmem_info *execmem_arch_setup(void); * Allocates memory that will contain executable code, either generated or * loaded from kernel modules. * + * Allocates memory that will contain data coupled with executable code, + * like data sections in kernel modules. + * * The memory will have protections defined by architecture for executable * region of the @type. * @@ -95,7 +123,7 @@ void *execmem_alloc(enum execmem_type type, size_t size); */ void execmem_free(void *ptr); -#ifdef CONFIG_EXECMEM +#if defined(CONFIG_EXECMEM) && !defined(CONFIG_ARCH_WANTS_EXECMEM_LATE) void execmem_init(void); #else static inline void execmem_init(void) {} |