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Per Westermark
04/22/11 01:19
Read: 846 times
Sweden


 
#181971 - A question if registers needs to be saved
Responding to: Erik Malund's previous message
Erik Malund said:
I'll reread when I get back from Easter vacation.
the way I read it the tail chaining only applied when an interrupt interrupted an interrupt.

Erik

I don't think that can happen - if an interrupt interrupts an interrupt, then you need to save registers to be able to pop back to the original interrupt again. But when an interrupt is ending, the processor is free to reuse the registers for a new interrupt handler instead of restoring the original registers to return to the main loop.


List of 32 messages in thread
TopicAuthorDate
[ARM] Any good introduction to ARM assembler?      Jan Waclawek      12/01/10 02:57      
   Every experimenters moving to ARM??      JecksonS Ben      12/01/10 03:12      
      Large span of capabilities with same tools etc      Per Westermark      12/01/10 03:34      
         Cheaper?      Andy Neil      12/01/10 03:56      
            Depends on how to compare      Per Westermark      12/01/10 05:27      
               How very true      Andy Neil      12/01/10 05:53      
               a caveat      Erik Malund      04/20/11 08:12      
                  Picking the right tool for the job.      Christoph Franck      04/21/11 02:08      
                     sometimes you are not the picker      Erik Malund      04/21/11 08:51      
                        Cortex NVIC behavior.      Christoph Franck      04/21/11 10:57      
                           the way I read it      Erik Malund      04/21/11 14:02      
                              A question if registers needs to be saved      Per Westermark      04/22/11 01:19      
                              Possible cases:      Christoph Franck      04/26/11 01:38      
         luckly      JecksonS Ben      12/01/10 05:32      
            Lucky??      Andy Neil      12/01/10 05:49      
      don't know about experimenters, but ...        Erik Malund      01/04/11 05:35      
         Easier to jump between many architectures now      Per Westermark      01/04/11 07:13      
   Have you tried...      Andy Neil      12/01/10 03:59      
      Is this a way to say "no"? ;-)      Jan Waclawek      12/01/10 06:03      
         In the absence of a recommendation...      Andy Neil      12/01/10 06:22      
   ARM assembly is fairly "plain" ...      Christoph Franck      12/01/10 05:55      
      RealView      Andy Neil      12/01/10 06:01      
      shorter, better...      Jan Waclawek      12/01/10 06:19      
         Just dive right in.      Christoph Franck      12/02/10 01:30      
            Not trivial either      Per Westermark      12/02/10 08:19      
               Valid points, but ...      Christoph Franck      12/03/10 04:15      
            none, then?      Jan Waclawek      12/02/10 13:43      
   related thread on LPC2000 yahoo group      Jan Waclawek      01/04/11 05:10      
   Erik found something      Andy Neil      03/09/11 10:48      
   Re: [ARM] Any good introduction to ARM assembler?      Gopal Amlekar      03/12/11 01:06      
   Check this link      AP Charles      04/23/11 05:50      
      Why? How is it relevant?      Andy Neil      04/23/11 08:45      

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