From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eli Zaretskii <eliz@is.elta.co.il>
To: Kevin Buettner <kevinb@cygnus.com>
Cc: gdb-patches@sources.redhat.com
Subject: Re: [PATCH] ia64-linux-nat.c: Make HW watchpoint support work again
Date: Sun, 01 Apr 2001 00:46:00 -0000
Message-id: <Pine.SUN.3.91.1010401104335.15706Q-100000@is>
References: <1010331222947.ZM13805@ocotillo.lan>
X-SW-Source: 2001-04/msg00000.html

On Sat, 31 Mar 2001, Kevin Buettner wrote:

> So, I conclude that it is easier (and safer) to just hard code this
> constant in GDB.  If someone has a better suggestion, I'm willing
> to listen...
> 
> 	* ia64-linux-nat.c (ia64_linux_stopped_by_watchpoint): Change
> 	TRAP_HWBKPT constant to match that in the kernel headers for
> 	Linux/IA-64.
> 
> Index: ia64-linux-nat.c
> ===================================================================
> RCS file: /cvs/src/src/gdb/ia64-linux-nat.c,v
> retrieving revision 1.8
> diff -u -p -r1.8 ia64-linux-nat.c
> --- ia64-linux-nat.c	2001/03/01 01:39:21	1.8
> +++ ia64-linux-nat.c	2001/03/31 21:48:28
> @@ -630,7 +630,7 @@ ia64_linux_stopped_by_watchpoint (int pi
>    errno = 0;
>    ptrace (PTRACE_GETSIGINFO, tid, (PTRACE_ARG3_TYPE) 0, &siginfo);
>  
> -  if (errno != 0 || siginfo.si_code != 4 /* TRAP_HWBKPT */)
> +  if (errno != 0 || siginfo.si_code != 0x30004 /* TRAP_HWBKPT */)
>      return 0;

How about masking the high bits of si_code?  Then it would work for
both cases, and will probably suffer less bitrot in the future.