release/src-rt-6.x/linux/linux-2.6/arch/um/sys-i386/sigcontext.c

   1 /*
   2  * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
   3  * Licensed under the GPL
   4  */
   5
   6 #include <stddef.h>
   7 #include <string.h>
   8 #include <asm/ptrace.h>
   9 #include <asm/sigcontext.h>
  10 #include "sysdep/ptrace.h"
  11 #include "kern_util.h"
  12
  13 void sc_to_sc(void *to_ptr, void *from_ptr)
  14 {
  15         struct sigcontext *to = to_ptr, *from = from_ptr;
  16
  17         memcpy(to, from, sizeof(*to) + sizeof(struct _fpstate));
  18         if(from->fpstate != NULL)
  19                 to->fpstate = (struct _fpstate *) (to + 1);
  20 }
  21
  22 unsigned long *sc_sigmask(void *sc_ptr)
  23 {
  24         struct sigcontext *sc = sc_ptr;
  25         return &sc->oldmask;
  26 }
  27
  28 int sc_get_fpregs(unsigned long buf, void *sc_ptr)
  29 {
  30         struct sigcontext *sc = sc_ptr;
  31         struct _fpstate *from = sc->fpstate, *to = (struct _fpstate *) buf;
  32         int err = 0;
  33
  34         if(from == NULL){
  35                 err |= clear_user_proc(&to->cw, sizeof(to->cw));
  36                 err |= clear_user_proc(&to->sw, sizeof(to->sw));
  37                 err |= clear_user_proc(&to->tag, sizeof(to->tag));
  38                 err |= clear_user_proc(&to->ipoff, sizeof(to->ipoff));
  39                 err |= clear_user_proc(&to->cssel, sizeof(to->cssel));
  40                 err |= clear_user_proc(&to->dataoff, sizeof(to->dataoff));
  41                 err |= clear_user_proc(&to->datasel, sizeof(to->datasel));
  42                 err |= clear_user_proc(&to->_st, sizeof(to->_st));
  43         }
  44         else {
  45                 err |= copy_to_user_proc(&to->cw, &from->cw, sizeof(to->cw));
  46                 err |= copy_to_user_proc(&to->sw, &from->sw, sizeof(to->sw));
  47                 err |= copy_to_user_proc(&to->tag, &from->tag,
  48                                          sizeof(to->tag));
  49                 err |= copy_to_user_proc(&to->ipoff, &from->ipoff,
  50                                          sizeof(to->ipoff));
  51                 err |= copy_to_user_proc(&to->cssel,& from->cssel,
  52                                          sizeof(to->cssel));
  53                 err |= copy_to_user_proc(&to->dataoff, &from->dataoff,
  54                                     sizeof(to->dataoff));
  55                 err |= copy_to_user_proc(&to->datasel, &from->datasel,
  56                                     sizeof(to->datasel));
  57                 err |= copy_to_user_proc(to->_st, from->_st, sizeof(to->_st));
  58         }
  59         return(err);
  60 }
  61
  62 /*
  63  * Overrides for Emacs so that we follow Linus's tabbing style.
  64  * Emacs will notice this stuff at the end of the file and automatically
  65  * adjust the settings for this buffer only.  This must remain at the end
  66  * of the file.
  67  * ---------------------------------------------------------------------------
  68  * Local variables:
  69  * c-file-style: "linux"
  70  * End:
  71  */