1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 #ifndef _LINUX_KCOV_IOCTLS_H 3 #define _LINUX_KCOV_IOCTLS_H 4 5 #include <linux/types.h> 6 7 #define KCOV_INIT_TRACE _IOR('c', 1, unsigned long) 8 #define KCOV_ENABLE _IO('c', 100) 9 #define KCOV_DISABLE _IO('c', 101) 10 11 enum { 12 /* 13 * Tracing coverage collection mode. 14 * Covered PCs are collected in a per-task buffer. 15 * In new KCOV version the mode is chosen by calling 16 * ioctl(fd, KCOV_ENABLE, mode). In older versions the mode argument 17 * was supposed to be 0 in such a call. So, for reasons of backward 18 * compatibility, we have chosen the value KCOV_TRACE_PC to be 0. 19 */ 20 KCOV_TRACE_PC = 0, 21 /* Collecting comparison operands mode. */ 22 KCOV_TRACE_CMP = 1, 23 }; 24 25 /* 26 * The format for the types of collected comparisons. 27 * 28 * Bit 0 shows whether one of the arguments is a compile-time constant. 29 * Bits 1 & 2 contain log2 of the argument size, up to 8 bytes. 30 */ 31 #define KCOV_CMP_CONST (1 << 0) 32 #define KCOV_CMP_SIZE(n) ((n) << 1) 33 #define KCOV_CMP_MASK KCOV_CMP_SIZE(3) 34 35 #endif /* _LINUX_KCOV_IOCTLS_H */ 36