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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> #define KCOV_INIT_TRACE _IOR('c', 1, unsigned long) #define KCOV_ENABLE _IO('c', 100) #define KCOV_DISABLE _IO('c', 101) 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) #endif /* _LINUX_KCOV_IOCTLS_H */