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79 lines
2.4 KiB
C++
79 lines
2.4 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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x64/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/kernel/process.h>
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#include <sortix/fork.h>
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#include <string.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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const uint64_t CS = 0x18;
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const uint64_t DS = 0x20;
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const uint64_t RPL = 0x3;
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regs->rdi = argc;
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regs->rsi = (size_t) argv;
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regs->rdx = envc;
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regs->rcx = (size_t) envp;
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regs->rip = entry;
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regs->userrsp = stackpos & ~(15UL);
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regs->rbp = regs->userrsp;
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regs->cs = CS | RPL;
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regs->ds = DS | RPL;
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regs->ss = DS | RPL;
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regs->rflags = 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->rip = requested->rip;
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regs->userrsp = requested->rsp;
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regs->rax = requested->rax;
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regs->rbx = requested->rbx;
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regs->rcx = requested->rcx;
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regs->rdx = requested->rdx;
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regs->rdi = requested->rdi;
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regs->rsi = requested->rsi;
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regs->rbp = requested->rbp;
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regs->r8 = requested->r8;
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regs->r9 = requested->r9;
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regs->r10 = requested->r10;
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regs->r11 = requested->r11;
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regs->r12 = requested->r12;
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regs->r13 = requested->r13;
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regs->r14 = requested->r14;
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regs->r15 = requested->r15;
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regs->cs = 0x18 | 0x3;
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regs->ds = 0x20 | 0x3;
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regs->ss = 0x20 | 0x3;
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regs->rflags = FLAGS_RESERVED1 | FLAGS_INTERRUPT | FLAGS_ID;
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}
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}
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