graphene/Pal/ipc/linux/ksyms.h

#ifndef _KSYM_H
#define _KSYM_H

#include <linux/kallsyms.h>

#define __KSYM(name) __ksym_##name
#define KSYM(name)             \
    ({                         \
        BUG_ON(!__KSYM(name)); \
        __KSYM(name);          \
    })
#define IMPORT_KSYM(name)                 __typeof(name)* __KSYM(name)
#define IMPORT_KSYM_PROTO(name, ret, ...) ret (*__KSYM(name))(__VA_ARGS__)
#define LOOKUP_KSYM(name)                                  \
    do {                                                   \
        __KSYM(name) = (void*)kallsyms_lookup_name(#name); \
        if (!__KSYM(name)) {                               \
            pr_err("Unknown symbol: " #name "\n");         \
            return -EINVAL;                                \
        }                                                  \
    } while (0)

#endif