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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778/* SPDX-License-Identifier: GPL-2.0 */#ifndef _LINUX_LIVEPATCH_HELPERS_H#define _LINUX_LIVEPATCH_HELPERS_H
/* * Interfaces for use by livepatch patches */
#include <linux/syscalls.h>#include <linux/livepatch.h>
#ifdef MODULE#define KLP_OBJNAME __KBUILD_MODNAME#else#define KLP_OBJNAME vmlinux#endif
/* Livepatch callback registration */
#define KLP_CALLBACK_PTRS ".discard.klp_callback_ptrs"
#define KLP_PRE_PATCH_CALLBACK(func) \ klp_pre_patch_t __used __section(KLP_CALLBACK_PTRS) \ __PASTE(__KLP_PRE_PATCH_PREFIX, KLP_OBJNAME) = func
#define KLP_POST_PATCH_CALLBACK(func) \ klp_post_patch_t __used __section(KLP_CALLBACK_PTRS) \ __PASTE(__KLP_POST_PATCH_PREFIX, KLP_OBJNAME) = func
#define KLP_PRE_UNPATCH_CALLBACK(func) \ klp_pre_unpatch_t __used __section(KLP_CALLBACK_PTRS) \ __PASTE(__KLP_PRE_UNPATCH_PREFIX, KLP_OBJNAME) = func
#define KLP_POST_UNPATCH_CALLBACK(func) \ klp_post_unpatch_t __used __section(KLP_CALLBACK_PTRS) \ __PASTE(__KLP_POST_UNPATCH_PREFIX, KLP_OBJNAME) = func
/* * Replace static_call() usage with this macro when create-diff-object * recommends it due to the original static call key living in a module. * * This converts the static call to a regular indirect call. */#define KLP_STATIC_CALL(name) \ ((typeof(STATIC_CALL_TRAMP(name))*)(STATIC_CALL_KEY(name).func))
/* Syscall patching */
#define KLP_SYSCALL_DEFINE1(name, ...) KLP_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)#define KLP_SYSCALL_DEFINE2(name, ...) KLP_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)#define KLP_SYSCALL_DEFINE3(name, ...) KLP_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)#define KLP_SYSCALL_DEFINE4(name, ...) KLP_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)#define KLP_SYSCALL_DEFINE5(name, ...) KLP_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)#define KLP_SYSCALL_DEFINE6(name, ...) KLP_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
#define KLP_SYSCALL_DEFINEx(x, sname, ...) \ __KLP_SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
#ifdef CONFIG_X86_64// TODO move this to arch/x86/include/asm/syscall_wrapper.h and share code#define __KLP_SYSCALL_DEFINEx(x, name, ...) \ static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)); \ static inline long __klp_do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\ __X64_SYS_STUBx(x, name, __VA_ARGS__) \ __IA32_SYS_STUBx(x, name, __VA_ARGS__) \ static long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \ { \ long ret = __klp_do_sys##name(__MAP(x,__SC_CAST,__VA_ARGS__));\ __MAP(x,__SC_TEST,__VA_ARGS__); \ __PROTECT(x, ret,__MAP(x,__SC_ARGS,__VA_ARGS__)); \ return ret; \ } \ static inline long __klp_do_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
#endif
#endif /* _LINUX_LIVEPATCH_HELPERS_H */