39 lines
1.2 KiB
C
39 lines
1.2 KiB
C
/*
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* \brief User-level task helpers (x86_64)
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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_64__INTERNAL__CALL_FUNC_H_
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#define _INCLUDE__SPEC__X86_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 ("movq %0, %%rsp;" /* load stack pointer */
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"movq %%rsp, %%rbp;" /* caller stack frame (for GDB debugging) */
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"movq %0, -8(%%rbp);"
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"movq %1, -16(%%rbp);"
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"movq %2, -24(%%rbp);"
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"sub $24, %%rsp;" /* adjust to next stack frame */
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"movq %2, %%rdi;" /* 1st argument */
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"call *-16(%%rbp);" /* call func */
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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_64__INTERNAL__CALL_FUNC_H_ */
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