Re: [PATCH/RFC] Get Alpha target to GDB_MULTI_ARCH_PARTIAL

[Andrew Cagney <ac131313@cygnus.com>]

Jason,

This and the fallout it causes can go in separatly.  Note the tweak.


> +++ alpha-tdep.h	19 Apr 2002 23:32:25 -0000
> @@ -0,0 +1,74 @@
> +/* Common target dependent code for GDB on Alpha systems.
> +   Copyright 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2002 Free
> +   Software Foundation, Inc.
> +
> +   This file is part of GDB.
> +
> +   This program is free software; you can redistribute it and/or modify
> +   it under the terms of the GNU General Public License as published by
> +   the Free Software Foundation; either version 2 of the License, or
> +   (at your option) any later version.
> +
> +   This program is distributed in the hope that it will be useful,
> +   but WITHOUT ANY WARRANTY; without even the implied warranty of
> +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> +   GNU General Public License for more details.
> +
> +   You should have received a copy of the GNU General Public License
> +   along with this program; if not, write to the Free Software
> +   Foundation, Inc., 59 Temple Place - Suite 330,
> +   Boston, MA 02111-1307, USA.  */

#ifndef ...
#define ...

You could also consider making much of this enum's (until the CPP stuff 
gets resolved).


> +/* Say how long (ordinary) registers are.  This is a piece of bogosity
> +   used in push_word and a few other places;  REGISTER_RAW_SIZE is the
> +   real way to know how big a register is.  */
> +#define ALPHA_REGISTER_SIZE 8
> +
> +/* Number of machine registers.  */
> +#define ALPHA_NUM_REGS 66
> +
> +/* Total amount of space needed to store our copies of the machine's
> +   register state.  */
> +#define ALPHA_REGISTER_BYTES (ALPHA_NUM_REGS * 8)
> +
> +/* Largest value REGISTER_RAW_SIZE can have.  */
> +#define ALPHA_MAX_REGISTER_RAW_SIZE 8
> +
> +/* Largest value REGISTER_VIRTUAL_SIZE can have.  */
> +#define ALPHA_MAX_REGISTER_VIRTUAL_SIZE 8
> +
> +/* Register numbers of various important registers.
> +   Note that most of these values are "real" register numbers,
> +   and correspond to the general registers of the machine,
> +   and FP_REGNUM is a "phony" register number which is too large
> +   to be an actual register number as far as the user is concerned
> +   but serves to get the desired value when passed to read_register.  */
> +
> +#define ALPHA_V0_REGNUM	     0  /* Function integer return value */
> +#define ALPHA_T7_REGNUM	     8  /* Return address register for OSF/1 __add* */
> +#define ALPHA_GCC_FP_REGNUM 15  /* Used by gcc as frame register */
> +#define ALPHA_A0_REGNUM     16  /* Loc of first arg during a subr call */
> +#define ALPHA_T9_REGNUM     23  /* Return address register for OSF/1 __div* */
> +#define ALPHA_T12_REGNUM    27  /* Contains start addr of current proc */
> +#define ALPHA_SP_REGNUM     30  /* Contains address of top of stack */
> +#define ALPHA_RA_REGNUM     26  /* Contains return address value */
> +#define ALPHA_ZERO_REGNUM   31  /* Read-only register, always 0 */
> +#define ALPHA_FP0_REGNUM    32  /* Floating point register 0 */
> +#define ALPHA_FPA0_REGNUM   48  /* First float arg during a subr call */
> +#define ALPHA_FPCR_REGNUM   63  /* Floating point control register */
> +#define ALPHA_PC_REGNUM     64  /* Contains program counter */
> +#define ALPHA_FP_REGNUM     65  /* Virtual frame pointer */
> +
> +/* The alpha has two different virtual pointers for arguments and locals.
> +   
> +   The virtual argument pointer is pointing to the bottom of the argument
> +   transfer area, which is located immediately below the virtual frame
> +   pointer. Its size is fixed for the native compiler, it is either zero
> +   (for the no arguments case) or large enough to hold all argument registers.
> +   gcc uses a variable sized argument transfer area. As it has
> +   to stay compatible with the native debugging tools it has to use the same
> +   virtual argument pointer and adjust the argument offsets accordingly.
> +   
> +   The virtual local pointer is localoff bytes below the virtual frame
> +   pointer, the value of localoff is obtained from the PDR.  */
> +#define ALPHA_NUM_ARG_REGS   6

Andrew