Date: Fri, 12 Sep 1997 07:20:01 -0700 (PDT) From: Jonathan Lemon <jlemon@americantv.com> To: freebsd-bugs Subject: Re: gnu/4517: Cannot debug with gdb with message 'Error accessing memory address' Message-ID: <199709121420.HAA06215@hub.freebsd.org>
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The following reply was made to PR gnu/4517; it has been noted by GNATS.
From: Jonathan Lemon <jlemon@americantv.com>
To: yasu@mrit.mei.co.jp
Cc: freebsd-gnats-submit@FreeBSD.ORG
Subject: Re: gnu/4517: Cannot debug with gdb with message 'Error accessing memory address'
Date: Fri, 12 Sep 1997 09:16:14 -0500
On Sep 09, 1997 at 03:17:20AM -0700, yasu@mrit.mei.co.jp wrote:
> Breakpoint 1, main () at test.c:3
> 3 x = 1;
> (gdb) n
> 4 }
> (gdb) set x = 100;
> Error accessing memory address 0xefbfd48c: Bad address.
Try this patch (courtesy of Bruce Evans):
--
Jonathan
------------------------------ cut here ------------------------------
diff -c2 vm_map.c~ vm_map.c
*** vm_map.c~ Mon Sep 1 18:00:38 1997
--- vm_map.c Wed Sep 10 14:02:48 1997
***************
*** 2288,2292 ****
(entry->eflags & MAP_ENTRY_COW) == 0 ||
(entry->wired_count != 0)) {
! if ((fault_type & (prot)) != fault_type)
RETURN(KERN_PROTECTION_FAILURE);
}
--- 2288,2293 ----
(entry->eflags & MAP_ENTRY_COW) == 0 ||
(entry->wired_count != 0)) {
! if ((fault_type & prot) !=
! (fault_type & ~VM_PROT_OVERRIDE_WRITE))
RETURN(KERN_PROTECTION_FAILURE);
}
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