3c13b0ffe7
The kernel does this along the return path to user mode. Reviewed-by: Helge Deller <deller@gmx.de> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
49 lines
1.5 KiB
C
49 lines
1.5 KiB
C
/*
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* HPPA specific CPU ABI and functions for linux-user
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*
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* Copyright (c) 2016 Richard Henderson
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef HPPA_TARGET_CPU_H
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#define HPPA_TARGET_CPU_H
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static inline void cpu_clone_regs_child(CPUHPPAState *env, target_ulong newsp,
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unsigned flags)
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{
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if (newsp) {
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env->gr[30] = newsp;
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}
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/* Indicate child in return value. */
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env->gr[28] = 0;
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/* Return from the syscall. */
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env->iaoq_f = env->gr[31] | PRIV_USER;
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env->iaoq_b = env->iaoq_f + 4;
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}
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static inline void cpu_clone_regs_parent(CPUHPPAState *env, unsigned flags)
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{
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}
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static inline void cpu_set_tls(CPUHPPAState *env, target_ulong newtls)
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{
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env->cr[27] = newtls;
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}
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static inline abi_ulong get_sp_from_cpustate(CPUHPPAState *state)
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{
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return state->gr[30];
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}
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#endif
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