arch/x86/kernel/sigframe.h

   1 #ifdef CONFIG_X86_32
   2 struct sigframe {
   3         char __user *pretcode;
   4         int sig;
   5         struct sigcontext sc;
   6         /*
   7          * fpstate is unused. fpstate is moved/allocated after
   8          * retcode[] below. This movement allows to have the FP state and the
   9          * future state extensions (xsave) stay together.
  10          * And at the same time retaining the unused fpstate, prevents changing
  11          * the offset of extramask[] in the sigframe and thus prevent any
  12          * legacy application accessing/modifying it.
  13          */
  14         struct _fpstate fpstate_unused;
  15         unsigned long extramask[_NSIG_WORDS-1];
  16         char retcode[8];
  17         /* fp state follows here */
  18 };
  19
  20 struct rt_sigframe {
  21         char __user *pretcode;
  22         int sig;
  23         struct siginfo __user *pinfo;
  24         void __user *puc;
  25         struct siginfo info;
  26         struct ucontext uc;
  27         char retcode[8];
  28         /* fp state follows here */
  29 };
  30 #else
  31 struct rt_sigframe {
  32         char __user *pretcode;
  33         struct ucontext uc;
  34         struct siginfo info;
  35         /* fp state follows here */
  36 };
  37 #endif