coregrind/pub_core_sigframe.h

   1
   2 /*--------------------------------------------------------------------*/
   3 /*--- Create/destroy signal delivery frames.                       ---*/
   4 /*---                                          pub_core_sigframe.h ---*/
   5 /*--------------------------------------------------------------------*/
   6
   7 /*
   8    This file is part of Valgrind, a dynamic binary instrumentation
   9    framework.
  10
  11    Copyright (C) 2000-2017 Julian Seward
  12       jseward@acm.org
  13
  14    This program is free software; you can redistribute it and/or
  15    modify it under the terms of the GNU General Public License as
  16    published by the Free Software Foundation; either version 2 of the
  17    License, or (at your option) any later version.
  18
  19    This program is distributed in the hope that it will be useful, but
  20    WITHOUT ANY WARRANTY; without even the implied warranty of
  21    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  22    General Public License for more details.
  23
  24    You should have received a copy of the GNU General Public License
  25    along with this program; if not, see <http://www.gnu.org/licenses/>.
  26
  27    The GNU General Public License is contained in the file COPYING.
  28 */
  29
  30 #ifndef __PUB_CORE_SIGFRAME_H
  31 #define __PUB_CORE_SIGFRAME_H
  32
  33 #include "pub_core_basics.h"     // VG_ macro
  34 #include "pub_core_vki.h"        // vki_sigset_t et al.
  35
  36 //--------------------------------------------------------------------
  37 // PURPOSE: This module creates and destroys signal delivery frames
  38 // for client threads, saving/restoring the thread CPU state in the
  39 // frame appropriately.
  40 //--------------------------------------------------------------------
  41
  42 /* This is an arbitrary si_code that we only use internally for SIGSEGV.
  43    It corresponds to the value SI_KERNEL on Linux, but that's not really
  44    of any significance. */
  45 #define VKI_SEGV_MADE_UP_GPF 0x80
  46
  47 /* Create a signal frame for thread 'tid'. */
  48 extern
  49 void VG_(sigframe_create) ( ThreadId tid,
  50                             Bool on_altstack,
  51                             Addr sp_top_of_frame,
  52                             const vki_siginfo_t *siginfo,
  53                             const struct vki_ucontext *uc,
  54                             void *handler,
  55                             UInt flags,
  56                             const vki_sigset_t *mask,
  57                             void *restorer );
  58
  59 /* Remove a signal frame from thread 'tid's stack, and
  60    restore the CPU state from it. */
  61 #ifdef VGO_freebsd
  62 extern
  63 void VG_(sigframe_destroy)( ThreadId tid );
  64 #else
  65 extern
  66 void VG_(sigframe_destroy)( ThreadId tid, Bool isRT );
  67 #endif
  68 #if defined(VGO_solaris)
  69 extern
  70 void VG_(sigframe_return)(ThreadId tid, const vki_ucontext_t *uc);
  71 #endif
  72
  73 #endif   // __PUB_CORE_SIGFRAME_H
  74
  75 /*--------------------------------------------------------------------*/
  76 /*--- end                                      pub_core_sigframe.h ---*/
  77 /*--------------------------------------------------------------------*/