arch/um/sys-x86_64/stub_segv.c

   1 /*
   2  * Copyright (C) 2004 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
   3  * Licensed under the GPL
   4  */
   5
   6 #include <signal.h>
   7 #include "as-layout.h"
   8 #include "sysdep/stub.h"
   9 #include "sysdep/faultinfo.h"
  10 #include "sysdep/sigcontext.h"
  11
  12 void __attribute__ ((__section__ (".__syscall_stub")))
  13 stub_segv_handler(int sig)
  14 {
  15         struct ucontext *uc;
  16
  17         __asm__ __volatile__("movq %%rdx, %0" : "=g" (uc) :);
  18         GET_FAULTINFO_FROM_SC(*((struct faultinfo *) STUB_DATA),
  19                               &uc->uc_mcontext);
  20         trap_myself();
  21 }
  22