Commits on Aug 12, 2016

1. Improve ARM semi-hosting support …

   This patch adds the following operations:
   
    - SYS_OPEN
    - SYS_CLOSE
    - SYS_WRITE
    - SYS_READ
    - SYS_ERRNO
    - SYS_REMOVE
    - SYS_SEEK
   
   The use of utility functions mem_read() and mem_write() add an
   unnecessary memcpy() call. All buffer transfer could be done directly in
   the sl->q_buf data instead of using a temporary transfer buffer.
   However, given the relative slowness of target memory transfer, I don't
   think that this has a big impact on performances

   

   Fabien-Chouteau committed Aug 12, 2016
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