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sortix--sortix/sortix/x86/process.cpp
2013-12-17 14:30:34 +01:00

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