36 lines
970 B
C
36 lines
970 B
C
/*
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* \brief User-level task helpers (arm_64)
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* \author Sebastian Sumpf
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* \date 2019-05-06
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*/
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/*
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* Copyright (C) 2019 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _INCLUDE__SPEC__ARM_64__INTERNAL__CALL_FUNC_H_
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#define _INCLUDE__SPEC__ARM_64__INTERNAL__CALL_FUNC_H_
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/* Libc includes */
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#include <setjmp.h> /* _setjmp() as we don't care about signal state */
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/**
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* Call function with a new stack
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*/
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[[noreturn]] inline void call_func(void *sp, void *func, void *arg)
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{
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asm volatile ("mov x0, %2;" /* set arg */
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"mov sp, %0;" /* set stack */
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"mov x29, xzr;" /* clear frame pointer */
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"br %1;" /* call func */
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""
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: : "r"(sp), "r"(func), "r"(arg) : "x0");
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__builtin_unreachable();
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}
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#endif /* _INCLUDE__SPEC__ARM_64__INTERNAL__CALL_FUNC_H_ */
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