kernel/tools/lib/traceevent/plugin_cfg80211.c

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