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 #include "frame_user.h"
  13
  14 int sc_size(void *data)
  15 {
  16         struct arch_frame_data *arch = data;
  17
  18         return(sizeof(struct sigcontext) + arch->fpstate_size);
  19 }
  20
  21 void sc_to_sc(void *to_ptr, void *from_ptr)
  22 {
  23         struct sigcontext *to = to_ptr, *from = from_ptr;
  24         int size = sizeof(*to) + signal_frame_sc.common.arch.fpstate_size;
  25
  26         memcpy(to, from, size);
  27         if(from->fpstate != NULL) to->fpstate = (struct _fpstate *) (to + 1);
  28 }
  29
  30 unsigned long *sc_sigmask(void *sc_ptr)
  31 {
  32         struct sigcontext *sc = sc_ptr;
  33
  34         return(&sc->oldmask);
  35 }
  36
  37 int sc_get_fpregs(unsigned long buf, void *sc_ptr)
  38 {
  39         struct sigcontext *sc = sc_ptr;
  40         struct _fpstate *from = sc->fpstate, *to = (struct _fpstate *) buf;
  41         int err = 0;
  42
  43         if(from == NULL){
  44                 err |= clear_user_proc(&to->cw, sizeof(to->cw));
  45                 err |= clear_user_proc(&to->sw, sizeof(to->sw));
  46                 err |= clear_user_proc(&to->tag, sizeof(to->tag));
  47                 err |= clear_user_proc(&to->ipoff, sizeof(to->ipoff));
  48                 err |= clear_user_proc(&to->cssel, sizeof(to->cssel));
  49                 err |= clear_user_proc(&to->dataoff, sizeof(to->dataoff));
  50                 err |= clear_user_proc(&to->datasel, sizeof(to->datasel));
  51                 err |= clear_user_proc(&to->_st, sizeof(to->_st));
  52         }
  53         else {
  54                 err |= copy_to_user_proc(&to->cw, &from->cw, sizeof(to->cw));
  55                 err |= copy_to_user_proc(&to->sw, &from->sw, sizeof(to->sw));
  56                 err |= copy_to_user_proc(&to->tag, &from->tag,
  57                                          sizeof(to->tag));
  58                 err |= copy_to_user_proc(&to->ipoff, &from->ipoff,
  59                                          sizeof(to->ipoff));
  60                 err |= copy_to_user_proc(&to->cssel,& from->cssel,
  61                                          sizeof(to->cssel));
  62                 err |= copy_to_user_proc(&to->dataoff, &from->dataoff,
  63                                     sizeof(to->dataoff));
  64                 err |= copy_to_user_proc(&to->datasel, &from->datasel,
  65                                     sizeof(to->datasel));
  66                 err |= copy_to_user_proc(to->_st, from->_st, sizeof(to->_st));
  67         }
  68         return(err);
  69 }
  70
  71 /*
  72  * Overrides for Emacs so that we follow Linus's tabbing style.
  73  * Emacs will notice this stuff at the end of the file and automatically
  74  * adjust the settings for this buffer only.  This must remain at the end
  75  * of the file.
  76  * ---------------------------------------------------------------------------
  77  * Local variables:
  78  * c-file-style: "linux"
  79  * End:
  80  */