Christopher Pascoe 7133a6c1f9 Ensure that we never write an out of bounds value (_bufend) to _begin or _end, even temporarily. ...

Testing:
  - Boot tested, ran basic serial I/O code

Notes:
  - Before this change, there are instruction like "s32i.n <reg>, <this>, <_begin>" in the
    disassembled output, followed by an overwrite if <reg> turns out to be _bufend.
    After this change, there is only one store instruction to <_begin> per function.

2015-12-07 00:23:46 -08:00

..

esp8266

Ensure that we never write an out of bounds value (_bufend) to _begin or _end, even temporarily.

2015-12-07 00:23:46 -08:00