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 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 55