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Re: eliminate deprecated_insert_raw_breakpoint. what's left.

On Wed, 10 Sep 2014, Ulrich Weigand wrote:

> > Here is what I found:
> >
> > 
> > I agree we can obsolete Alpha OSF/1 as well.
> Once OSF/1 and IRIX are gone, I hope all of the ECOFF/mdebug debug
> format support can go as well (mipsread.c, mdebugread.c etc.) ...

 Some of that stuff will best stay, to support Procedure Descriptor 
Records used on MIPS ELF targets, including but not limited to Linux.  

 These records are the only way to get backtracing, and consequently any 
reasonable control of the debuggee, to work from places that have debug 
information stripped, such as often when you interrupt your debuggee while 
waiting in a syscall ( will often have no debug information 
included, as usually won't other system-installed shared libraries).  
Without that debugging is from my experience severely impeded -- you end 
up in the middle of nowhere and virtually all you can do is `continue' or 
`stepi', that'll in many cases merely put you back in the sleeping 

 All MIPS ELF binaries produced by the GNU toolchain carry these PDR 
records along unless their exclusion has been explicitly requested from 
GAS (which is not the default and in most cases undesirable, these records 
are very lightweight and occupy little space).

 I have already identified `mdebugread.h' being the only piece required 
though -- in addition to `mips-mdebug-tdep.h' and `mips-mdebug-tdep.c' 
that were removed from our tree as a result of an unfortunate coincidence 
and have been maintained outside it for years now; they need some 
improvements at the time they are brought back too.  Maybe `mdebugread.h' 
can be stripped down a bit and actually folded into `mips-mdebug-tdep.h' 


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