[patch/rfc/rfa:sh] gdbarch_register_read() -> gdbarch_cooked_register_read()

[Andrew Cagney]

Hello,

The attached patch replaces the architecture vector interface:

   void gdbarch_register_read (struct gdbarch *gdbarch, int regnum, char 
*buf);

with the new interface:

   void gdbarch_cooked_register_read (struct gdbarch *gdbarch, struct 
regcache *regcache, int regnum, void *buf)

and then fixes the consequnces (all syntatic).


One NB.  The parameter set is technically redundant.  The assertion:

	gdbarch == regcache_gdbarch (regcache)

always holds so the gdbarch parameter isn't strictly needed.  I figured 
that it is more convenient to include the gdbarch as a parameter and 
save everyone the hassle of including the above line in their *-tdep code.

The SH stuff should be reviewed.  I think its on the right track since 
sh-tdep.c no longer refers to current_regcache!!!

comments? sh ok?
Andrew
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