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Rev 76 Rev 81
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        t->ustack = (__u8 *) frame_us;
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        t->ustack = (__u8 *) frame_us;
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        context_save(&t->saved_context);
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        context_save(&t->saved_context);
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        t->saved_context.pc = FADDR(cushion);
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        t->saved_context.pc = FADDR(cushion);
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        t->saved_context.sp = (__address) &t->kstack[THREAD_STACK_SIZE-8];
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        t->saved_context.sp = (__address) &t->kstack[THREAD_STACK_SIZE-SP_DELTA];
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        pri = cpu_priority_high();
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        pri = cpu_priority_high();
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        t->saved_context.pri = cpu_priority_read();
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        t->saved_context.pri = cpu_priority_read();
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        cpu_priority_restore(pri);
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        cpu_priority_restore(pri);
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