From fc00c656c96528112d05cf0edf8631bd5eaea446 Mon Sep 17 00:00:00 2001 From: Kacper Date: Sun, 7 Dec 2025 20:10:31 +0100 Subject: Add build system scaffolding and libc headers --- include/arch/x86_64/linux/kcov.h | 63 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 include/arch/x86_64/linux/kcov.h (limited to 'include/arch/x86_64/linux/kcov.h') diff --git a/include/arch/x86_64/linux/kcov.h b/include/arch/x86_64/linux/kcov.h new file mode 100644 index 00000000..b987d141 --- /dev/null +++ b/include/arch/x86_64/linux/kcov.h @@ -0,0 +1,63 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +#ifndef _LINUX_KCOV_IOCTLS_H +#define _LINUX_KCOV_IOCTLS_H + +#include + +/* + * 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 */ -- cgit v1.2.3