Re: [RFA] 32/64 mistake in mips_find_saved_regs

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

I believe n32 should be setting mips64 to 1.  Can you please change that. .

As for the below, yes ok.  Can you please also update the comment to 
read something like:

``[Apparently] The freg_offset gives the offset to the first 64 bit saved.

When the ABI specifies 64 bit saved registers, the FREG_OFFSET 
designates the first saved 64 bit register.

When the ABI specifies 32 bit saved registers, the ``64 bit saved 
DOUBLE'' consists of two adjacent 32 bit registers,  Hence FREG_OFFSET, 
designates the address of the lower register of the register pair. 
Adjust the offset so that it designates the upper register of the pair 
-- i.e., the address of the first saved 32 bit register.''

I think that is more correct.

Andrew

> Here is a test that should check for stack/register size, not
> whether target == mips64.
> 
> Fixes four failures in callfuncs.exp, no other regressions.
> 
> 
> 
> 2002-08-05  Michael Snyder  <msnyder@redhat.com>
> 
> 	*  mips-tdep.c (mips_find_saved_regs): Adjust stack according
> 	to MIPS_SAVED_REGSIZE, not GDB_TARGET_IS_MIPS64.  N32 is not
> 	MIPS64, but it does save 64 bits worth of register.
> 
> Index: mips-tdep.c
> ===================================================================
> RCS file: /cvs/src/src/gdb/mips-tdep.c,v
> retrieving revision 1.88
> diff -p -r1.88 mips-tdep.c
> *** mips-tdep.c	1 Aug 2002 23:10:34 -0000	1.88
> --- mips-tdep.c	6 Aug 2002 04:32:33 -0000
> *************** mips_find_saved_regs (struct frame_info 
> *** 1371,1379 ****
>        were saved.  */
>     reg_position = fci->frame + PROC_FREG_OFFSET (proc_desc);
>   
> !   /* The freg_offset points to where the first *double* register
> !      is saved.  So skip to the high-order word. */
> !   if (!GDB_TARGET_IS_MIPS64)
>       reg_position += MIPS_SAVED_REGSIZE;
>   
>     /* Fill in the offsets for the float registers which float_mask says
> --- 1371,1379 ----
>        were saved.  */
>     reg_position = fci->frame + PROC_FREG_OFFSET (proc_desc);
>   
> !   /* The freg_offset points to where the first *double* register is
> !      saved.  So skip to the high-order word if saved_reg_size == 4. */
> !   if (MIPS_SAVED_REGSIZE == 4)
>       reg_position += MIPS_SAVED_REGSIZE;
>   
>     /* Fill in the offsets for the float registers which float_mask says