hosted/state.cc

/*
 * Copyright (c) 2008-2014, Pedigree Developers
 *
 * Please see the CONTRIB file in the root of the source tree for a full
 * list of contributors.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
#include "pedigree/kernel/processor/state.h"
 
#include <ucontext.h>
 
const char* HostedInterruptStateRegisterName[3] = {
    "state",
    "extra",
    "meta",
};
 
HostedInterruptState::HostedInterruptState()
    : state(0),
      which(0),
      fromUserspace(0),
      extra(0),
      meta(0),
      m_basePointer(0),
      m_instructionPointer(0),
      m_stackPointer(0) {}
 
HostedInterruptState::~HostedInterruptState() {}
 
size_t HostedInterruptState::getRegisterCount() const {
  return 3;
}
processor_register_t HostedInterruptState::getRegister(size_t index) const {
  if (index == 0)
    return state;
  if (index == 1)
    return extra;
  if (index == 2)
    return meta;
  return 0;
}
const char* HostedInterruptState::getRegisterName(size_t index) const {
  return HostedInterruptStateRegisterName[index];
}
 
size_t HostedSyscallState::getRegisterCount() const {
  return 0;
}
 
processor_register_t HostedSyscallState::getRegister(size_t index) const {
  return 0;
}
 
const char* HostedSyscallState::getRegisterName(size_t index) const {
  return "<no registers>";
}
 
HostedInterruptState* HostedInterruptState::construct(HostedProcessorState& state, bool userMode) {
  return 0;
}
 
HostedSchedulerState::HostedSchedulerState() {
  stackBase = 0;
  stackSize = 0;
 
  ucontext_t* ctx = reinterpret_cast<ucontext_t*>(state);
  getcontext(ctx);
}