Re: sh64 simulator register numbers

[Andrew Cagney <ac131313@ges.redhat.com>]

> AFAICS the sh64 simulator doesn't need any changes for this renumbering,
> while gdb would need some decoupling from the simulator's register numbers.
> 
> Should we create a header file that describes the register numbers when
> talking to hardware, and make gdb use that for its internal numbers?
> Or should it define the numbers inside sh-tdep.c ?

See the directory gdb/regformats/ and (more importantly) the mail 
archives for information on the changes that are being made to GDB so 
that it will eventually be able to handle remote register numbers.

--

Anyway, the below is wrong.  As was pointed out before, the enum values 
should not be hardwired.

Andrew

> !   /* SHmedia */
> !   SIM_SH64_R0_REGNUM = 128,
> !   SIM_SH64_SP_REGNUM   = SIM_SH64_R0_REGNUM+15,
> !   SIM_SH64_PC_REGNUM   = SIM_SH64_R0_REGNUM+64,
> !   /* 64 64-bit control registers */
> !   SIM_SH64_CR0_REGNUM  = SIM_SH64_R0_REGNUM+65,
> !   /* Some of these have specific names.  */
> !   SIM_SH64_SR_REGNUM   = SIM_SH64_CR0_REGNUM,    /* Status reg            */
> !   SIM_SH64_SSR_REGNUM  = SIM_SH64_CR0_REGNUM+1,  /* Saved status reg      */
> !   SIM_SH64_PSSR_REGNUM = SIM_SH64_CR0_REGNUM+2,  /* Panic-saved status reg*/
> !   SIM_SH64_INTEVT_REGNUM=SIM_SH64_CR0_REGNUM+4,  /* Interrupt event reg   */
> !   SIM_SH64_EXPEVT_REGNUM=SIM_SH64_CR0_REGNUM+5,  /* Exception event reg   */
> !   SIM_SH64_PEXPEVT_REGNUM= SIM_SH64_CR0_REGNUM+6,/* Panic-saved Exception
> ! 								event reg */
> !   SIM_SH64_TRA_REGNUM  = SIM_SH64_CR0_REGNUM+7,  /* TRAP exception reg    */
> !   SIM_SH64_SPC_REGNUM  = SIM_SH64_CR0_REGNUM+8,  /* Saved program counter */
> !   SIM_SH64_PSPC_REGNUM = SIM_SH64_CR0_REGNUM+9,  /* Panic-saved program
> ! 								  counter */
> !   SIM_SH64_RESVEC_REGNUM=SIM_SH64_CR0_REGNUM+10, /* Reset vector          */
> !   SIM_SH64_VBR_REGNUM  = SIM_SH64_CR0_REGNUM+11, /* Vector base register  */
> !   SIM_SH64_TEA_REGNUM  = SIM_SH64_CR0_REGNUM+13, /* Faulting effective
> ! 							 address register */
> !   SIM_SH64_DCR_REGNUM  = SIM_SH64_CR0_REGNUM+16, /* Debug control reg     */
> !   SIM_SH64_KCR0_REGNUM = SIM_SH64_CR0_REGNUM+17, /* Kernel register 0     */
> !   SIM_SH64_KCR1_REGNUM = SIM_SH64_CR0_REGNUM+18, /* Kernel register 1     */
> !   SIM_SH64_CTC_REGNUM  = SIM_SH64_CR0_REGNUM+62, /* Clock tick counter    */
> !   SIM_SH64_USR_REGNUM  = SIM_SH64_CR0_REGNUM+63, /* User-accessible
> ! 							  status register */
> !   SIM_SH64_CR63_REGNUM = SIM_SH64_R0_REGNUM+128,
> !   SIM_SH64_TR0_REGNUM  = SIM_SH64_R0_REGNUM+129,
> !   SIM_SH64_FPSCR_REGNUM= SIM_SH64_R0_REGNUM+137,
> !   SIM_SH64_FR0_REGNUM  = SIM_SH64_R0_REGNUM+138