Re: [RFA] Fix an unwinding problem on alpha-tru64

[Andrew Cagney <cagney@gnu.org>]

Applied and committed, trunk and branch.

> Index: alpha-tdep.c
> ===================================================================
> RCS file: /cvs/src/src/gdb/alpha-tdep.c,v
> retrieving revision 1.128
> diff -u -p -r1.128 alpha-tdep.c
> --- alpha-tdep.c	23 Mar 2004 14:47:54 -0000	1.128
> +++ alpha-tdep.c	31 Mar 2004 23:58:36 -0000
> @@ -1029,6 +1029,16 @@ alpha_heuristic_frame_unwind_cache (stru
>  	    {
>  	      reg = (word & 0x03e00000) >> 21;
>  
> +              /* Ignore this instruction if we have already encountered
> +                 an instruction saving the same register earlier in the
> +                 function code.  The current instruction does not tell
> +                 us where the original value upon function entry is saved.
> +                 All it says is that the function we are scanning reused
> +                 that register for some computation of its own, and is now
> +                 saving its result.  */
> +              if (info->saved_regs[reg])
> +                continue;
> +
>  	      if (reg == 31)
>  		continue;
>  

Andrew