query_module(2) | System Calls Manual | query_module(2) |
query_module - query the kernel for various bits pertaining to modules
#include <linux/module.h>
[[deprecated]] int query_module(const char *name, int which, void buf[.bufsize], size_t bufsize, size_t *ret);
Note: This system call is present only before Linux 2.6.
query_module() requests information from the kernel about loadable modules. The returned information is placed in the buffer pointed to by buf. The caller must specify the size of buf in bufsize. The precise nature and format of the returned information depend on the operation specified by which. Some operations require name to identify a currently loaded module, some allow name to be NULL, indicating the kernel proper.
The following values can be specified for which:
struct module_symbol {
unsigned long value;
unsigned long name; };
struct module_info {
unsigned long address;
unsigned long size;
unsigned long flags; };
On success, zero is returned. On error, -1 is returned and errno is set to indicate the error.
This system call is present only up until Linux 2.4; it was removed in Linux 2.6.
query_module() is Linux-specific.
Some of the information that was formerly available via query_module() can be obtained from /proc/modules, /proc/kallsyms, and the files under the directory /sys/module.
The query_module() system call is not supported by glibc. No declaration is provided in glibc headers, but, through a quirk of history, glibc does export an ABI for this system call. Therefore, in order to employ this system call, it is sufficient to manually declare the interface in your code; alternatively, you can invoke the system call using syscall(2).
create_module(2), delete_module(2), get_kernel_syms(2), init_module(2), lsmod(8), modinfo(8)
2022-12-04 | Linux man-pages 6.03 |