74 lines
2.3 KiB
C++
74 lines
2.3 KiB
C++
/*
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* \brief Kernel back-end for execution contexts in userland
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* \author Martin Stein
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* \author Reto Buerki
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* \author Stefan Kalkowski
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* \date 2013-11-11
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*/
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/*
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* Copyright (C) 2013-2017 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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/* core includes */
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#include <kernel/cpu.h>
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#include <kernel/thread.h>
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#include <kernel/pd.h>
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void Kernel::Thread::_call_update_data_region() { }
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void Kernel::Thread::_call_update_instr_region() { }
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void Kernel::Thread::_call_update_pd() {
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Genode::Cpu::Cr3::write(Genode::Cpu::Cr3::read());
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}
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extern void * __tss_client_context_ptr;
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void Kernel::Thread::proceed(Cpu & cpu)
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{
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void * * tss_stack_ptr = (&__tss_client_context_ptr);
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*tss_stack_ptr = (void*)((addr_t)&*regs + sizeof(Genode::Cpu_state));
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cpu.switch_to(*regs, pd()->mmu_regs);
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asm volatile("mov %0, %%rsp \n"
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"popq %%r8 \n"
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"popq %%r9 \n"
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"popq %%r10 \n"
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"popq %%r11 \n"
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"popq %%r12 \n"
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"popq %%r13 \n"
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"popq %%r14 \n"
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"popq %%r15 \n"
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"popq %%rax \n"
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"popq %%rbx \n"
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"popq %%rcx \n"
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"popq %%rdx \n"
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"popq %%rdi \n"
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"popq %%rsi \n"
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"popq %%rbp \n"
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"add $16, %%rsp \n"
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"iretq \n" :: "r" (®s->r8));
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}
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void Kernel::Thread::user_arg_0(Kernel::Call_arg const arg) { regs->rdi = arg; }
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void Kernel::Thread::user_arg_1(Kernel::Call_arg const arg) { regs->rsi = arg; }
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void Kernel::Thread::user_arg_2(Kernel::Call_arg const arg) { regs->rdx = arg; }
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void Kernel::Thread::user_arg_3(Kernel::Call_arg const arg) { regs->rcx = arg; }
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void Kernel::Thread::user_arg_4(Kernel::Call_arg const arg) { regs->r8 = arg; }
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Kernel::Call_arg Kernel::Thread::user_arg_0() const { return regs->rdi; }
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Kernel::Call_arg Kernel::Thread::user_arg_1() const { return regs->rsi; }
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Kernel::Call_arg Kernel::Thread::user_arg_2() const { return regs->rdx; }
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Kernel::Call_arg Kernel::Thread::user_arg_3() const { return regs->rcx; }
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Kernel::Call_arg Kernel::Thread::user_arg_4() const { return regs->r8; }
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