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42192df83a
The child side of clone needs to set the secondary syscall return value, r7, to indicate syscall success. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220421151735.31996-3-richard.henderson@linaro.org>
50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
/*
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* Nios2 specific CPU ABI and functions for linux-user
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*
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* Copyright (c) 2016 Marek Vasut <marex@denx.de>
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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 NIOS2_TARGET_CPU_H
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#define NIOS2_TARGET_CPU_H
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static inline void cpu_clone_regs_child(CPUNios2State *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->regs[R_SP] = newsp;
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}
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env->regs[R_RET0] = 0;
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env->regs[7] = 0;
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}
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static inline void cpu_clone_regs_parent(CPUNios2State *env, unsigned flags)
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{
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}
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static inline void cpu_set_tls(CPUNios2State *env, target_ulong newtls)
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{
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/*
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* Linux kernel 3.10 does not pay any attention to CLONE_SETTLS
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* in copy_thread(), so QEMU need not do so either.
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*/
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}
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static inline abi_ulong get_sp_from_cpustate(CPUNios2State *state)
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{
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return state->regs[R_SP];
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}
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#endif
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