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83b346edef
In some cases especially for on-going development & debugging of real
application it might be useful to load and run not from flash but
from RAM in that case there's one catch: we cannot reset the board
after loading memory with our app.
That's because:
a) RAM we use might be either cleared on reset or might enter
unpredictable state with portion of previously loaded data
being corrupted.
b) Reset vector most probably still point to ROM/flash and so
our current application won't be executed on reset.
So instead of "run reset" command of OpenOCD we'll use
"resume 0x12345678". Where 0x12345678 is our application's
entry-point (which BTW may very well not match beginning of
the .text section or link base).
Now to extract the entry-point we need our application's zephyr.elf
and since we already have a requirement for Elf we may use it for
loading because OpenOCD does it perfectly fine moreover automatically
detecting loaded image type (binary, hex, Elf etc).
And to use that nice feature just add "--use-elf" to west's
command-line for boards that use "openocd" runner. Like that:
----------->8--------------
west flash --use-elf
----------->8--------------
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
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