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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677/* SPDX-License-Identifier: GPL-2.0 *//* * External livepatch interfaces for patch creation tooling */
#ifndef _LINUX_LIVEPATCH_EXTERNAL_H_#define _LINUX_LIVEPATCH_EXTERNAL_H_
#include <linux/types.h>
#define KLP_RELOC_SEC_PREFIX ".klp.rela."#define KLP_SYM_PREFIX ".klp.sym."
#define __KLP_PRE_PATCH_PREFIX __klp_pre_patch_callback_#define __KLP_POST_PATCH_PREFIX __klp_post_patch_callback_#define __KLP_PRE_UNPATCH_PREFIX __klp_pre_unpatch_callback_#define __KLP_POST_UNPATCH_PREFIX __klp_post_unpatch_callback_
#define KLP_PRE_PATCH_PREFIX __stringify(__KLP_PRE_PATCH_PREFIX)#define KLP_POST_PATCH_PREFIX __stringify(__KLP_POST_PATCH_PREFIX)#define KLP_PRE_UNPATCH_PREFIX __stringify(__KLP_PRE_UNPATCH_PREFIX)#define KLP_POST_UNPATCH_PREFIX __stringify(__KLP_POST_UNPATCH_PREFIX)
struct klp_object;
typedef int (*klp_pre_patch_t)(struct klp_object *obj);typedef void (*klp_post_patch_t)(struct klp_object *obj);typedef void (*klp_pre_unpatch_t)(struct klp_object *obj);typedef void (*klp_post_unpatch_t)(struct klp_object *obj);
/** * struct klp_callbacks - pre/post live-(un)patch callback structure * @pre_patch: executed before code patching * @post_patch: executed after code patching * @pre_unpatch: executed before code unpatching * @post_unpatch: executed after code unpatching * @post_unpatch_enabled: flag indicating if post-unpatch callback * should run * * All callbacks are optional. Only the pre-patch callback, if provided, * will be unconditionally executed. If the parent klp_object fails to * patch for any reason, including a non-zero error status returned from * the pre-patch callback, no further callbacks will be executed. */struct klp_callbacks { klp_pre_patch_t pre_patch; klp_post_patch_t post_patch; klp_pre_unpatch_t pre_unpatch; klp_post_unpatch_t post_unpatch; bool post_unpatch_enabled;};
/* * 'struct klp_{func,object}_ext' are compact "external" representations of * 'struct klp_{func,object}'. They are used by objtool for livepatch * generation. The structs are then read by the livepatch module and converted * to the real structs before calling klp_enable_patch(). * * TODO make these the official API for klp_enable_patch(). That should * simplify livepatch's interface as well as its data structure lifetime * management. */struct klp_func_ext { const char *old_name; void *new_func; unsigned long sympos;};
struct klp_object_ext { const char *name; struct klp_func_ext *funcs; struct klp_callbacks callbacks; unsigned int nr_funcs;};
#endif /* _LINUX_LIVEPATCH_EXTERNAL_H_ */