[patch,rfc] builtin regs -> user regs

[Andrew Cagney]

> Hello,
> 
> Ref: Three register layers
> http://sources.redhat.com/ml/gdb/2003-06/msg00437.html
> 
> This patch replaces the builtin registers with user [visible] per-frame registers.
> 
> The builtin registers were global - always present regardless of the architecture.  These new user [visible] registers support both global, and per-architecture registers.
> 
> As with the above post, these registers live on top of the frame vis:
> 
>     user
>      |
>     cooked/frame
>      |
>     raw

I've checked this in.

Andrew


> and this makes it possible to construct user visible registers using per-frame register values.  In the case of the MIPS, the 64 bit $fpr0 would be the concatenation of the two 32 bit registers: $fgr0 and $fgr1.
> 
> Please note though that the way registers are read/written needs further refinement (I left it as is for the moment).  I suspect, for instance, that currently register writes don't work at all.
> 
> I'm also not comfortable with using `builtin' for the registers that apply to all architectures.  Perhaphs:
>     user_reg_add_all
>     user_reg_add_global
> are better.  Thougts?
> 
> comments?
> Andrew
> 
> (no this isn't for the 6.0 branch)
> 
> 
> 
> 2003-06-29  Andrew Cagney  <cagney@redhat.com>
> 
> 	* expprint.c: Include "user-regs.h" instead of "frame.h".
> 	(print_subexp): Use user_reg_map_regnum_to_name, instead of
> 	frame_map_regnum_to_name.
> 	* frame.c: Include "user-regs.h" instead of "builtin-regs.h".
> 	(frame_map_name_to_regnum): Simplify, call
> 	user_reg_map_name_to_regnum.
> 	(frame_map_regnum_to_name): Simplify, call
> 	user_reg_map_regnum_to_name.
> 	(frame_register_unwind): Update.
> 	* std-regs.c: Include "user-regs.h" instead of "builtin-regs.h".
> 	(_initialize_frame_reg): Call user_reg_add_builtin.
> 	* findvar.c: Include "user-regs.h" instead of "builtin-regs.h".
> 	(value_of_register): Use value_of_user_reg.
> 	* eval.c (evaluate_subexp_standard): Update.
> 	* parse.c (write_dollar_variable): Update.
> 	* d10v-tdep.c (d10v_print_registers_info): Update.
> 	* infcmd.c (registers_info): Update.
> 	* Makefile.in (SFILES): Delete "builtin-regs.c", add "user-regs.c".
> 	(builtin_regs_h): Delete macro.
> 	(user_regs_h): Define.
> 	(COMMON_OBS): Delete "builtin-regs.o", add "user-regs.o".
> 	(builtin-regs.o): Delete target.
> 	(user-regs.o): Specify dependencies.
> 	(expprint.o): Update dependencies.
> 	(findvar.o): Update dependencies.
> 	(frame.o): Update dependencies.
> 	(std-regs.o): Update dependencies.
>