36 lines
958 B
C
36 lines
958 B
C
/*
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* \brief User-level task helpers (x86_32)
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* \author Christian Helmuth
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* \date 2016-01-22
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*/
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/*
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* Copyright (C) 2016-2017 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__X86_32__INTERNAL__CALL_FUNC_H_
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#define _INCLUDE__SPEC__X86_32__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 ("movl %2, 0(%0);"
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"movl %1, -0x4(%0);"
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"movl %0, %%esp;"
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"xorl %%ebp, %%ebp;" /* clear frame pointer */
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"call *-4(%%esp);"
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: : "r" (sp), "r" (func), "r" (arg));
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__builtin_unreachable();
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}
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#endif /* _INCLUDE__SPEC__X86_32__INTERNAL__CALL_FUNC_H_ */
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