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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _LINUX_KCOV_IOCTLS_H
#define _LINUX_KCOV_IOCTLS_H
#include <linux/types.h>
/*
* Argument for KCOV_REMOTE_ENABLE ioctl, see Documentation/dev-tools/kcov.rst
* and the comment before kcov_remote_start() for usage details.
*/
struct kcov_remote_arg {
__u32 trace_mode; /* KCOV_TRACE_PC or KCOV_TRACE_CMP */
__u32 area_size; /* Length of coverage buffer in words */
__u32 num_handles; /* Size of handles array */
__aligned_u64 common_handle;
__aligned_u64 handles[0];
};
#define KCOV_REMOTE_MAX_HANDLES 0x100
#define KCOV_INIT_TRACE _IOR('c', 1, unsigned long)
#define KCOV_ENABLE _IO('c', 100)
#define KCOV_DISABLE _IO('c', 101)
#define KCOV_REMOTE_ENABLE _IOW('c', 102, struct kcov_remote_arg)
enum {
/*
* Tracing coverage collection mode.
* Covered PCs are collected in a per-task buffer.
* In new KCOV version the mode is chosen by calling
* ioctl(fd, KCOV_ENABLE, mode). In older versions the mode argument
* was supposed to be 0 in such a call. So, for reasons of backward
* compatibility, we have chosen the value KCOV_TRACE_PC to be 0.
*/
KCOV_TRACE_PC = 0,
/* Collecting comparison operands mode. */
KCOV_TRACE_CMP = 1,
};
/*
* The format for the types of collected comparisons.
*
* Bit 0 shows whether one of the arguments is a compile-time constant.
* Bits 1 & 2 contain log2 of the argument size, up to 8 bytes.
*/
#define KCOV_CMP_CONST (1 << 0)
#define KCOV_CMP_SIZE(n) ((n) << 1)
#define KCOV_CMP_MASK KCOV_CMP_SIZE(3)
#define KCOV_SUBSYSTEM_COMMON (0x00ull << 56)
#define KCOV_SUBSYSTEM_USB (0x01ull << 56)
#define KCOV_SUBSYSTEM_MASK (0xffull << 56)
#define KCOV_INSTANCE_MASK (0xffffffffull)
static __inline__ __u64 kcov_remote_handle(__u64 subsys, __u64 inst)
{
if (subsys & ~KCOV_SUBSYSTEM_MASK || inst & ~KCOV_INSTANCE_MASK)
return 0;
return subsys | inst;
}
#endif /* _LINUX_KCOV_IOCTLS_H */