linux-user/alpha/target_cpu.h

   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
  22 static 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
  33 static 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
  45 static inline void cpu_set_tls(CPUAlphaState *env, target_ulong newtls)
  46 {
  47     env->unique = newtls;
  48 }
  49
  50 static inline abi_ulong get_sp_from_cpustate(CPUAlphaState *state)
  51 {
  52     return state->ir[IR_SP];
  53 }
  54 #endif