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charset="UTF-8" Copy the KALLSYMS_QUERY_* definitions from include/uapi/linux/fs.h for the proc selftests. Signed-off-by: Samuel Wu --- tools/include/uapi/linux/fs.h | 56 +++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) diff --git a/tools/include/uapi/linux/fs.h b/tools/include/uapi/linux/fs.h index f0a26309b6d5..286e82c61189 100644 --- a/tools/include/uapi/linux/fs.h +++ b/tools/include/uapi/linux/fs.h @@ -567,4 +567,60 @@ struct procmap_query { __u64 build_id_addr; /* in */ }; +/* /proc/kallsyms ioctls. -EPERM if the opener cannot see kernel addresses. */ +#define KALLSYMS_QUERY_BY_NAME _IOC(_IOC_READ | _IOC_WRITE, PROCFS_IOCTL_MAGIC, 48, 0) +#define KALLSYMS_QUERY_BY_ADDR _IOC(_IOC_READ | _IOC_WRITE, PROCFS_IOCTL_MAGIC, 49, 0) + +enum kallsyms_query_flags { + /* Match query_name as a prefix. */ + KALLSYMS_QUERY_NAME_PREFIX = 0x01, +}; + +/* + * Symbol returned by a query. Each buffer pointer and its *_len must both be + * set or both be 0. When set, the kernel sets *_len to the string size + * including the NUL, even if the buffer is too small and the ioctl fails with + * -ENAMETOOLONG. The module name of a vmlinux symbol is "". + */ +struct kallsyms_query_sym { + __u64 sym_addr; /* out - start address */ + __u64 sym_size; /* out - bytes to next symbol, 0 if unknown */ + __u64 sym_name; /* in - user ptr to name buffer, or 0 */ + __u64 sym_name_len; /* in/out - buffer size / string size */ + __u64 sym_module; /* in - user ptr to module name buffer, or 0 */ + __u64 sym_module_len; /* in/out - buffer size / string size */ +}; + +/* + * Find a symbol by exact name, or by prefix with KALLSYMS_QUERY_NAME_PREFIX, + * in the entries of /proc/kallsyms, except undefined module symbols. vmlinux + * matches come first. A module_filter of "vmlinux" selects the core kernel. + * + * Each call returns one match and sets pos to its position, even on + * -ENAMETOOLONG. Start with pos 0 and use pos + 1 for the next match, until + * -ENOENT. Use pos only with the same query. Matches can be skipped or + * repeated if symbols change between calls. + */ +struct kallsyms_query_by_name { + __u64 size; /* in - sizeof(struct kallsyms_query_by_name) */ + __u64 query_flags; /* in - enum kallsyms_query_flags */ + __u64 query_name; /* in - user ptr to name or prefix */ + __u64 module_filter; /* in - user ptr to loaded module name, or 0 */ + __u64 pos; /* in/out - start position / match position */ + __u64 sym; /* in - user ptr to struct kallsyms_query_sym */ + __u64 sym_struct_size; /* in - sizeof(struct kallsyms_query_sym) */ +}; + +/* + * Find the /proc/kallsyms entry that covers query_addr, or return -ENOENT. + * ftrace trampolines and kprobe pages are not resolved yet. + */ +struct kallsyms_query_by_addr { + __u64 size; /* in - sizeof(struct kallsyms_query_by_addr) */ + __u64 query_flags; /* in - must be 0 */ + __u64 query_addr; /* in - kernel address */ + __u64 sym; /* in - user ptr to struct kallsyms_query_sym */ + __u64 sym_struct_size; /* in - sizeof(struct kallsyms_query_sym) */ +}; + #endif /* _UAPI_LINUX_FS_H */ -- 2.56.0.679.gc527c65306-goog