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kcov.h
/* 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[]; }; #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 */
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