On 11/12/15 11:50, Chris Johns wrote:
>>
>>The only reason I ask is the trace linker needs external symbols to
>>work and they are interesting symbols. Static symbols cannot be
>>remapped by gld.
>
>I think tracing is not really interesting in the system startup
>sequence. It is single threaded with interrupts disabled. So, in case
>there is a problem, a classic debugger should be sufficient.
It can provide a useful way to measure timing. I suppose someone
interested can change the code.
All the constructors are used via function pointers, so without
link-time optimization and a very smart compiler, they must exist as a
single function. You can use objcopy --globalize-symbol if you really
need a global symbol, e.g. for tracing.
--
Sebastian Huber, embedded brains GmbH
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