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[avr-libc-dev] [bug #44140] wdt_disable() macro clobbers prescaller bits
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From: |
Georg-Johann Lay |
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Subject: |
[avr-libc-dev] [bug #44140] wdt_disable() macro clobbers prescaller bits and can cause unexpected resets |
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Date: |
Wed, 06 May 2015 11:40:00 +0000 |
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User-agent: |
Mozilla/5.0 (X11; Linux i686; rv:31.0) Gecko/20100101 Firefox/31.0 |
Follow-up Comment #4, bug #44140 (project avr-libc):
Remaks to
https://savannah.nongnu.org/bugs/download.php?file_id=33934
* adds "memory" clobber to all
* use constraint "d" with ORI reg
* use constraint "n" with SFR_MEM_ADDR
* use "n" with some non-address compile time constants
* use SFR_MEM_ADDR if used in LDS / STS
* use SFR_IO_ADDR if used in IN / OUT
This is completely untested. In particular, the right fix for the latter 2
might be to use LDS/STS instead of IN/OUT and not adjusting operands.
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