tools/lib/traceevent/plugins/plugin_cfg80211.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <stdio.h>
   3 #include <string.h>
   4 #include <inttypes.h>
   5 #include <endian.h>
   6 #include "event-parse.h"
   7
   8 /*
   9  * From glibc endian.h, for older systems where it is not present, e.g.: RHEL5,
  10  * Fedora6.
  11  */
  12 #ifndef le16toh
  13 # if __BYTE_ORDER == __LITTLE_ENDIAN
  14 #  define le16toh(x) (x)
  15 # else
  16 #  define le16toh(x) __bswap_16 (x)
  17 # endif
  18 #endif
  19
  20
  21 static unsigned long long
  22 process___le16_to_cpup(struct trace_seq *s, unsigned long long *args)
  23 {
  24         uint16_t *val = (uint16_t *) (unsigned long) args[0];
  25         return val ? (long long) le16toh(*val) : 0;
  26 }
  27
  28 int TEP_PLUGIN_LOADER(struct tep_handle *tep)
  29 {
  30         tep_register_print_function(tep,
  31                                     process___le16_to_cpup,
  32                                     TEP_FUNC_ARG_INT,
  33                                     "__le16_to_cpup",
  34                                     TEP_FUNC_ARG_PTR,
  35                                     TEP_FUNC_ARG_VOID);
  36         return 0;
  37 }
  38
  39 void TEP_PLUGIN_UNLOADER(struct tep_handle *tep)
  40 {
  41         tep_unregister_print_function(tep, process___le16_to_cpup,
  42                                       "__le16_to_cpup");
  43 }