linux-user/ppc/target_cpu.h

   1 /*
   2  * PowerPC specific CPU ABI and functions for linux-user
   3  *
   4  * Copyright (c) 2003-2007 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 PPC_TARGET_CPU_H
  20 #define PPC_TARGET_CPU_H
  21
  22 static inline void cpu_clone_regs_child(CPUPPCState *env, target_ulong newsp,
  23                                         unsigned flags)
  24 {
  25     if (newsp) {
  26         env->gpr[1] = newsp;
  27     }
  28     env->gpr[3] = 0;
  29 }
  30
  31 static inline void cpu_clone_regs_parent(CPUPPCState *env, unsigned flags)
  32 {
  33 }
  34
  35 static inline void cpu_set_tls(CPUPPCState *env, target_ulong newtls)
  36 {
  37 #if defined(TARGET_PPC64)
  38     /* The kernel checks TIF_32BIT here; we don't support loading 32-bit
  39        binaries on PPC64 yet. */
  40     env->gpr[13] = newtls;
  41 #else
  42     env->gpr[2] = newtls;
  43 #endif
  44 }
  45
  46 #ifndef EF_PPC64_ABI
  47 #define EF_PPC64_ABI           0x3
  48 #endif
  49
  50 static inline uint32_t get_ppc64_abi(struct image_info *infop)
  51 {
  52   return infop->elf_flags & EF_PPC64_ABI;
  53 }
  54
  55 static inline abi_ulong get_sp_from_cpustate(CPUPPCState *state)
  56 {
  57     return state->gpr[1];
  58 }
  59 #endif