LXR qemu/linux-user/alpha/target

   1/*
   2 * Alpha specific CPU ABI and functions for linux-user
   3 *
   4 *  Copyright (c) 2007 Jocelyn Mayer
   5 *
   6 * This library is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU Lesser General Public
   8 * License as published by the Free Software Foundation; either
   9 * version 2.1 of the License, or (at your option) any later version.
  10 *
  11 * This library is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 * Lesser General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU Lesser General Public
  17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18 */
  19#ifndef ALPHA_TARGET_CPU_H
  20#define ALPHA_TARGET_CPU_H
  21
  22static inline void cpu_clone_regs_child(CPUAlphaState *env, target_ulong newsp,
  23                                        unsigned flags)
  24{
  25    if (newsp) {
  26        env->ir[IR_SP] = newsp;
  27    }
  28    env->ir[IR_V0] = 0;
  29    env->ir[IR_A3] = 0;
  30    env->ir[IR_A4] = 1;  /* OSF/1 secondary return: child */
  31}
  32
  33static inline void cpu_clone_regs_parent(CPUAlphaState *env, unsigned flags)
  34{
  35    /*
  36     * OSF/1 secondary return: parent
  37     * Note that the kernel does not do this if SETTLS, because the
  38     * settls argument register is still live after copy_thread.
  39     */
  40    if (!(flags & CLONE_SETTLS)) {
  41        env->ir[IR_A4] = 0;
  42    }
  43}
  44
  45static inline void cpu_set_tls(CPUAlphaState *env, target_ulong newtls)
  46{
  47    env->unique = newtls;
  48}
  49
  50static inline abi_ulong get_sp_from_cpustate(CPUAlphaState *state)
  51{
  52    return state->ir[IR_SP];
  53}
  54#endif
  55