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/* Definitions borrowed from the Linux kernel, thus subject to GPLv2. */
#ifndef _STAPDYN_LINUX_DEFS_H_
#define _STAPDYN_LINUX_DEFS_H_
#include "linux_hash.h"
#define min(x, y) ({ \
typeof(x) _min1 = (x); \
typeof(y) _min2 = (y); \
(void) (&_min1 == &_min2); \
_min1 < _min2 ? _min1 : _min2; })
#define max(x, y) ({ \
typeof(x) _max1 = (x); \
typeof(y) _max2 = (y); \
(void) (&_max1 == &_max2); \
_max1 > _max2 ? _max1 : _max2; })
#define min_t(type, x, y) ({ \
type __min1 = (x); \
type __min2 = (y); \
__min1 < __min2 ? __min1: __min2; })
#define max_t(type, x, y) ({ \
type __max1 = (x); \
type __max2 = (y); \
__max1 > __max2 ? __max1: __max2; })
#define clamp(val, min, max) ({ \
typeof(val) __val = (val); \
typeof(min) __min = (min); \
typeof(max) __max = (max); \
(void) (&__val == &__min); \
(void) (&__val == &__max); \
__val = __val < __min ? __min: __val; \
__val > __max ? __max: __val; })
#define clamp_t(type, val, min, max) ({ \
type __val = (val); \
type __min = (min); \
type __max = (max); \
__val = __val < __min ? __min: __val; \
__val > __max ? __max: __val; })
#define likely(x) __builtin_expect(!!(x), 1)
#define unlikely(x) __builtin_expect(!!(x), 0)
#define container_of(ptr, type, member) ({ \
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
(type *)( (char *)__mptr - offsetof(type,member) );})
#define __must_be_array(arr) 0
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
#ifndef CLOCK_MONOTONIC_RAW
#define CLOCK_MONOTONIC_RAW CLOCK_MONOTONIC
#endif
#define noinline __attribute__((noinline))
#define ATOMIC_INIT(i) { (i) }
static inline void atomic_inc(atomic_t *v)
{
atomic_add_return(1, v);
}
static inline void atomic_dec(atomic_t *v)
{
atomic_sub_return(1, v);
}
static inline int atomic_read(const atomic_t *v)
{
return (*(volatile int *)&(v)->counter);
}
static inline void atomic_set(atomic_t *v, int i)
{
v->counter = i;
}
#define atomic_inc_return(v) atomic_add_return(1, (v))
#define do_div(n,base) ({ \
uint32_t __base = (base); \
uint32_t __rem; \
__rem = ((uint64_t)(n)) % __base; \
(n) = ((uint64_t)(n)) / __base; \
__rem; \
})
static inline size_t strlcpy(char *dest, const char *src, size_t size)
{
size_t ret = strlen(src);
if (size) {
size_t len = (ret >= size) ? size - 1 : ret;
memcpy(dest, src, len);
dest[len] = '\0';
}
return ret;
}
static inline size_t strlcat(char *dest, const char *src, size_t count)
{
size_t dsize = strlen(dest);
size_t len = strlen(src);
size_t res = dsize + len;
/* This would be a bug */
//BUG_ON(dsize >= count);
dsize = min(dsize, count);
dest += dsize;
count -= dsize;
if (len >= count)
len = count-1;
memcpy(dest, src, len);
dest[len] = 0;
return res;
}
#define __must_check __attribute__((warn_unused_result))
# define __force
# define __user
# define __chk_user_ptr(x) (void)0
#define user_mode(regs) 1
#define __get_user(x, ptr) \
({ \
int __gu_err = -EFAULT; \
__chk_user_ptr(ptr); \
switch (sizeof(*(ptr))) { \
case 1: { \
unsigned char __x; \
__gu_err = __get_user_fn(sizeof (*(ptr)), \
ptr, &__x); \
(x) = *(__force __typeof__(*(ptr)) *) &__x; \
break; \
}; \
case 2: { \
unsigned short __x; \
__gu_err = __get_user_fn(sizeof (*(ptr)), \
ptr, &__x); \
(x) = *(__force __typeof__(*(ptr)) *) &__x; \
break; \
}; \
case 4: { \
unsigned int __x; \
__gu_err = __get_user_fn(sizeof (*(ptr)), \
ptr, &__x); \
(x) = *(__force __typeof__(*(ptr)) *) &__x; \
break; \
}; \
case 8: { \
unsigned long long __x; \
__gu_err = __get_user_fn(sizeof (*(ptr)), \
ptr, &__x); \
(x) = *(__force __typeof__(*(ptr)) *) &__x; \
break; \
}; \
default: \
__get_user_bad(); \
break; \
} \
__gu_err; \
})
static inline __must_check long __copy_from_user(void *to,
const void __user * from, unsigned long n);
static inline int __get_user_fn(size_t size, const void __user *ptr, void *x)
{
size = __copy_from_user(x, ptr, size);
return size ? -EFAULT : size;
}
extern int __get_user_bad(void) __attribute__((noreturn));
#define __put_user(x, ptr) \
({ \
int __gu_err = -EFAULT; \
__chk_user_ptr(ptr); \
switch (sizeof(*(ptr))) { \
case 1: { \
unsigned char __x = (unsigned char)(x); \
__gu_err = __put_user_fn(sizeof (*(ptr)), \
ptr, &__x); \
break; \
}; \
case 2: { \
unsigned short __x = (unsigned short)(x); \
__gu_err = __put_user_fn(sizeof (*(ptr)), \
ptr, &__x); \
break; \
}; \
case 4: { \
unsigned int __x = (unsigned int)(x); \
__gu_err = __put_user_fn(sizeof (*(ptr)), \
ptr, &__x); \
break; \
}; \
case 8: { \
unsigned long long __x = (unsigned long long)(x); \
__gu_err = __put_user_fn(sizeof (*(ptr)), \
ptr, &__x); \
break; \
}; \
default: \
__put_user_bad(); \
break; \
} \
__gu_err; \
})
static inline __must_check long __copy_to_user(void *to, const void *from,
unsigned long n);
static inline int __put_user_fn(size_t size, const void __user *ptr, void *x)
{
size = __copy_to_user(x, ptr, size);
return size ? -EFAULT : size;
}
extern int __put_user_bad(void) __attribute__((noreturn));
#endif /* _STAPDYN_LINUX_DEFS_H_ */
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