Luna/kernel/src/thread/Task.cpp

#include "thread/Task.h"
#include "std/string.h"

void set_context_from_task(Task& task, Context* ctx)
{
    memcpy(ctx, &task.regs, sizeof(Context));
}

void get_context_to_task(Task& task, Context* ctx)
{
    memcpy(&task.regs, ctx, sizeof(Context));
}

void task_save_floating(Task& task)
{
    task.floating_saved = true;
    asm volatile("fxsave (%0)" : : "r"(&task.floating_region));
}

void task_restore_floating(Task& task)
{
    if (!task.floating_saved) return;
    asm volatile("fxrstor (%0)" : : "r"(&task.floating_region));
}

bool Task::is_user_task()
{
    return (regs.cs & 3) > 0;
}