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