apio
a6f0a7056f
We were previously looking at its segment registers to see if they were user-like, but this method is bad. What is the task was executing a system call? So now, we store that value at creation time.
29 lines
591 B
C++
29 lines
591 B
C++
#include "thread/Task.h"
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#include "std/string.h"
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void set_context_from_task(Task& task, Context* ctx)
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{
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memcpy(ctx, &task.regs, sizeof(Context));
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}
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void get_context_to_task(Task& task, Context* ctx)
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{
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memcpy(&task.regs, ctx, sizeof(Context));
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}
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void task_save_floating(Task& task)
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{
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task.floating_saved = true;
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asm volatile("fxsave (%0)" : : "r"(&task.floating_region));
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}
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void task_restore_floating(Task& task)
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{
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if (!task.floating_saved) return;
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asm volatile("fxrstor (%0)" : : "r"(&task.floating_region));
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}
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bool Task::is_user_task()
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{
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return user_task;
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} |