| /* 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 */ |