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sortix--sortix/sortix/x64/process.cpp
2013-12-17 14:30:23 +01:00

79 lines
2.4 KiB
C++

/*******************************************************************************
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/>.
x64/process.cpp
CPU-specific process code.
*******************************************************************************/
#include <sortix/kernel/platform.h>
#include <sortix/fork.h>
#include <string.h>
#include "process.h"
namespace Sortix
{
void Process::ExecuteCPU(int argc, char** argv, int envc, char** envp,
addr_t stackpos, addr_t entry,
CPU::InterruptRegisters* regs)
{
const uint64_t CS = 0x18;
const uint64_t DS = 0x20;
const uint64_t RPL = 0x3;
regs->rdi = argc;
regs->rsi = (size_t) argv;
regs->rdx = envc;
regs->rcx = (size_t) envp;
regs->rip = entry;
regs->userrsp = stackpos & ~(15UL);
regs->rbp = regs->userrsp;
regs->cs = CS | RPL;
regs->ds = DS | RPL;
regs->ss = DS | RPL;
regs->rflags = FLAGS_RESERVED1 | FLAGS_INTERRUPT | FLAGS_ID;
}
void InitializeThreadRegisters(CPU::InterruptRegisters* regs,
const tforkregs_t* requested)
{
memset(regs, 0, sizeof(*regs));
regs->rip = requested->rip;
regs->userrsp = requested->rsp;
regs->rax = requested->rax;
regs->rbx = requested->rbx;
regs->rcx = requested->rcx;
regs->rdx = requested->rdx;
regs->rdi = requested->rdi;
regs->rsi = requested->rsi;
regs->rbp = requested->rbp;
regs->r8 = requested->r8;
regs->r9 = requested->r9;
regs->r10 = requested->r10;
regs->r11 = requested->r11;
regs->r12 = requested->r12;
regs->r13 = requested->r13;
regs->r14 = requested->r14;
regs->r15 = requested->r15;
regs->cs = 0x18 | 0x3;
regs->ds = 0x20 | 0x3;
regs->ss = 0x20 | 0x3;
regs->rflags = FLAGS_RESERVED1 | FLAGS_INTERRUPT | FLAGS_ID;
}
}