/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

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#ifndef _LINUX_KCOV_IOCTLS_H

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#define _LINUX_KCOV_IOCTLS_H

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#include <linux/types.h>

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#define KCOV_INIT_TRACE _IOR('c', 1, unsigned long)

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#define KCOV_ENABLE _IO('c', 100)

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#define KCOV_DISABLE _IO('c', 101)

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enum {

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/*

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* Tracing coverage collection mode.

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* Covered PCs are collected in a per-task buffer.

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* In new KCOV version the mode is chosen by calling

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* ioctl(fd, KCOV_ENABLE, mode). In older versions the mode argument

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* was supposed to be 0 in such a call. So, for reasons of backward

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* compatibility, we have chosen the value KCOV_TRACE_PC to be 0.

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*/

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KCOV_TRACE_PC = 0,

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/* Collecting comparison operands mode. */

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KCOV_TRACE_CMP = 1,

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};

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/*

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* The format for the types of collected comparisons.

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*

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* Bit 0 shows whether one of the arguments is a compile-time constant.

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* Bits 1 & 2 contain log2 of the argument size, up to 8 bytes.

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*/

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#define KCOV_CMP_CONST (1 << 0)

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#define KCOV_CMP_SIZE(n) ((n) << 1)

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#define KCOV_CMP_MASK KCOV_CMP_SIZE(3)

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#endif /* _LINUX_KCOV_IOCTLS_H */

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