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        /*
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        /*
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         * Write kernel stack address to %g6 and a pointer to the last item
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         * Write kernel stack address to %g6 and a pointer to the last item
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         * in the userspace window buffer to %g7 in the alternate and interrupt sets.
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         * in the userspace window buffer to %g7 in the alternate and interrupt sets.
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         */
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         */
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        uint64_t sp = (uintptr_t) THREAD->kstack + STACK_SIZE
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        uint64_t sp = (uintptr_t) THREAD->kstack + STACK_SIZE
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            - (STACK_BIAS + ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT) + STACK_WINDOW_SAVE_AREA_SIZE);
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            - (STACK_BIAS + ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT));
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        write_to_ig_g6(sp);
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        write_to_ig_g6(sp);
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        write_to_ag_g6(sp);
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        write_to_ag_g6(sp);
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        write_to_ag_g7((uintptr_t) THREAD->arch.uspace_window_buffer);
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        write_to_ag_g7((uintptr_t) THREAD->arch.uspace_window_buffer);
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    }
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    }
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}
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}