/* 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[];
};
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)
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