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67 lines
2.1 KiB
C++
67 lines
2.1 KiB
C++
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2011, 2012.
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This file is part of Sortix.
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Sortix is free software: you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation, either version 3 of the License, or (at your option) any later
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version.
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Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along with
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Sortix. If not, see <http://www.gnu.org/licenses/>.
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x86/process.cpp
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CPU-specific process code.
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*******************************************************************************/
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#include <sortix/kernel/platform.h>
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#include <sortix/fork.h>
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#include <string.h>
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#include "process.h"
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namespace Sortix
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{
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void Process::ExecuteCPU(int argc, char** argv, int envc, char** envp,
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addr_t stackpos, addr_t entry,
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CPU::InterruptRegisters* regs)
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{
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regs->eax = argc;
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regs->ebx = (size_t) argv;
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regs->edx = envc;
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regs->ecx = (size_t) envp;
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regs->eip = entry;
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regs->useresp = stackpos & ~(15UL);
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regs->ebp = regs->useresp;
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regs->cs = UCS | URPL;
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regs->ds = UDS | URPL;
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regs->ss = UDS | URPL;
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regs->eflags = FLAGS_RESERVED1 | FLAGS_INTERRUPT | FLAGS_ID;
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}
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void InitializeThreadRegisters(CPU::InterruptRegisters* regs,
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const tforkregs_t* requested)
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{
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memset(regs, 0, sizeof(*regs));
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regs->eip = requested->eip;
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regs->useresp = requested->esp;
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regs->eax = requested->eax;
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regs->ebx = requested->ebx;
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regs->ecx = requested->ecx;
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regs->edx = requested->edx;
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regs->edi = requested->edi;
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regs->esi = requested->esi;
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regs->ebp = requested->ebp;
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regs->cs = UCS | URPL;
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regs->ds = UDS | URPL;
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regs->ss = UDS | URPL;
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regs->eflags = FLAGS_RESERVED1 | FLAGS_INTERRUPT | FLAGS_ID;
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}
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}
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