linux-user/i386/target_cpu.h

   1 /*
   2  * i386 specific CPU ABI and functions for linux-user
   3  *
   4  *  Copyright (c) 2003 Fabrice Bellard
   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
  20 #ifndef I386_TARGET_CPU_H
  21 #define I386_TARGET_CPU_H
  22
  23 static inline void cpu_clone_regs_child(CPUX86State *env, target_ulong newsp,
  24                                         unsigned flags)
  25 {
  26     if (newsp) {
  27         env->regs[R_ESP] = newsp;
  28     }
  29     env->regs[R_EAX] = 0;
  30 }
  31
  32 static inline void cpu_clone_regs_parent(CPUX86State *env, unsigned flags)
  33 {
  34 }
  35
  36 abi_long do_arch_prctl(CPUX86State *env, int code, abi_ulong addr);
  37
  38 #if defined(TARGET_ABI32)
  39 abi_long do_set_thread_area(CPUX86State *env, abi_ulong ptr);
  40
  41 static inline void cpu_set_tls(CPUX86State *env, target_ulong newtls)
  42 {
  43     do_set_thread_area(env, newtls);
  44     cpu_x86_load_seg(env, R_GS, env->segs[R_GS].selector);
  45 }
  46 #else
  47 static inline void cpu_set_tls(CPUX86State *env, target_ulong newtls)
  48 {
  49     do_arch_prctl(env, TARGET_ARCH_SET_FS, newtls);
  50 }
  51 #endif /* defined(TARGET_ABI32) */
  52
  53 static inline abi_ulong get_sp_from_cpustate(CPUX86State *state)
  54 {
  55     return state->regs[R_ESP];
  56 }
  57 #endif /* I386_TARGET_CPU_H */