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        }
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        }
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        /*
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        /*
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         * Prepare new GDT for CPU in question.
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         * Prepare new GDT for CPU in question.
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         */
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         */
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        if (!(gdt_new = (struct descriptor *) malloc(GDT_ITEMS*sizeof(struct descriptor))))
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        if (!(gdt_new = (struct descriptor *) malloc(GDT_ITEMS*sizeof(struct descriptor), FRAME_ATOMIC)))
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            panic("couldn't allocate memory for GDT\n");
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            panic("couldn't allocate memory for GDT\n");
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        memcpy(gdt_new, gdt, GDT_ITEMS * sizeof(struct descriptor));
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        memcpy(gdt_new, gdt, GDT_ITEMS * sizeof(struct descriptor));
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        memsetb((__address)(&gdt_new[TSS_DES]), sizeof(struct descriptor), 0);
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        memsetb((__address)(&gdt_new[TSS_DES]), sizeof(struct descriptor), 0);
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        protected_ap_gdtr.limit = GDT_ITEMS * sizeof(struct descriptor);
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        protected_ap_gdtr.limit = GDT_ITEMS * sizeof(struct descriptor);