arch/um/os-Linux/tls.c

   1 #include <errno.h>
   2 #include <sys/ptrace.h>
   3 #include "sysdep/tls.h"
   4
   5 /* TLS support - we basically rely on the host's one.*/
   6
   7 #ifndef PTRACE_GET_THREAD_AREA
   8 #define PTRACE_GET_THREAD_AREA 25
   9 #endif
  10
  11 #ifndef PTRACE_SET_THREAD_AREA
  12 #define PTRACE_SET_THREAD_AREA 26
  13 #endif
  14
  15 int os_set_thread_area(user_desc_t *info, int pid)
  16 {
  17         int ret;
  18
  19         ret = ptrace(PTRACE_SET_THREAD_AREA, pid, info->entry_number,
  20                      (unsigned long) info);
  21         if (ret < 0)
  22                 ret = -errno;
  23         return ret;
  24 }
  25
  26 int os_get_thread_area(user_desc_t *info, int pid)
  27 {
  28         int ret;
  29
  30         ret = ptrace(PTRACE_GET_THREAD_AREA, pid, info->entry_number,
  31                      (unsigned long) info);
  32         if (ret < 0)
  33                 ret = -errno;
  34         return ret;
  35 }