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- /* SPDX-License-Identifier: GPL-2.0 */
- #ifndef _STATIC_CALL_TYPES_H
- #define _STATIC_CALL_TYPES_H
- #include <linux/types.h>
- #include <linux/stringify.h>
- #include <linux/compiler.h>
- #define STATIC_CALL_KEY_PREFIX __SCK__
- #define STATIC_CALL_KEY_PREFIX_STR __stringify(STATIC_CALL_KEY_PREFIX)
- #define STATIC_CALL_KEY_PREFIX_LEN (sizeof(STATIC_CALL_KEY_PREFIX_STR) - 1)
- #define STATIC_CALL_KEY(name) __PASTE(STATIC_CALL_KEY_PREFIX, name)
- #define STATIC_CALL_KEY_STR(name) __stringify(STATIC_CALL_KEY(name))
- #define STATIC_CALL_TRAMP_PREFIX __SCT__
- #define STATIC_CALL_TRAMP_PREFIX_STR __stringify(STATIC_CALL_TRAMP_PREFIX)
- #define STATIC_CALL_TRAMP_PREFIX_LEN (sizeof(STATIC_CALL_TRAMP_PREFIX_STR) - 1)
- #define STATIC_CALL_TRAMP(name) __PASTE(STATIC_CALL_TRAMP_PREFIX, name)
- #define STATIC_CALL_TRAMP_STR(name) __stringify(STATIC_CALL_TRAMP(name))
- /*
- * Flags in the low bits of static_call_site::key.
- */
- #define STATIC_CALL_SITE_TAIL 1UL /* tail call */
- #define STATIC_CALL_SITE_INIT 2UL /* init section */
- #define STATIC_CALL_SITE_FLAGS 3UL
- /*
- * The static call site table needs to be created by external tooling (objtool
- * or a compiler plugin).
- */
- struct static_call_site {
- s32 addr;
- s32 key;
- };
- #define DECLARE_STATIC_CALL(name, func) \
- extern struct static_call_key STATIC_CALL_KEY(name); \
- extern typeof(func) STATIC_CALL_TRAMP(name);
- #ifdef CONFIG_HAVE_STATIC_CALL
- #define __raw_static_call(name) (&STATIC_CALL_TRAMP(name))
- #ifdef CONFIG_HAVE_STATIC_CALL_INLINE
- /*
- * __ADDRESSABLE() is used to ensure the key symbol doesn't get stripped from
- * the symbol table so that objtool can reference it when it generates the
- * .static_call_sites section.
- */
- #define __STATIC_CALL_ADDRESSABLE(name) \
- __ADDRESSABLE(STATIC_CALL_KEY(name))
- #define __static_call(name) \
- ({ \
- __STATIC_CALL_ADDRESSABLE(name); \
- __raw_static_call(name); \
- })
- #else /* !CONFIG_HAVE_STATIC_CALL_INLINE */
- #define __STATIC_CALL_ADDRESSABLE(name)
- #define __static_call(name) __raw_static_call(name)
- #endif /* CONFIG_HAVE_STATIC_CALL_INLINE */
- #ifdef MODULE
- #define __STATIC_CALL_MOD_ADDRESSABLE(name)
- #define static_call_mod(name) __raw_static_call(name)
- #else
- #define __STATIC_CALL_MOD_ADDRESSABLE(name) __STATIC_CALL_ADDRESSABLE(name)
- #define static_call_mod(name) __static_call(name)
- #endif
- #define static_call(name) __static_call(name)
- #else
- #define static_call(name) \
- ((typeof(STATIC_CALL_TRAMP(name))*)(STATIC_CALL_KEY(name).func))
- #endif /* CONFIG_HAVE_STATIC_CALL */
- #endif /* _STATIC_CALL_TYPES_H */
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