Eli Zaretskii wrote:

>> From: Vladimir Prus <vladimir@codesourcery.com>
>> Date: Thu, 9 Nov 2006 23:36:22 +0300
>> 
>> This patch makes gdb, when target memory map is available, optionally
>> reject all memory accesses outside of regions in memory map. The
>> rationale is that:
>> 
>> 1. It's sometimes better to get error that have the write silently do
>>         nothing or read returning garbase.
>> 
>> 2. For some targets, accesses to non-existent memory "wedge" them.
>> 
>> Since memory maps are still rare, this behaviour is enabled only by a new
>> command.
>> 
>> OK?
> 
> This patch introduces a new user command, but doesn't include a patch
> for the user manual.  Please provide one.

Sorry. This version of the patch includes documentation.

- Volodya

        gdb/
        * memattr.h (enum mem_access_mode): New value
        MEM_NONE.
        * memattr.c (unknown_mem_attrib): New.
        (inaccessible_by_default): New.
        (show_inaccessible_by_default): New.
        (lookup_mem_region): Check inaccessible_by_default.
        (dummy_cmd): New.
        (mem_set_cmdlist, mem_show_cmdlist): New.
        (_initialize_mem): Register new "set" and "show"
        commands.
        * target.c (memory_xfer_partial): If memory type
        is MEM_NONE, return an error.
        Clip to region size when calling to_xfer_partial.
        If upper limit of memory range is 0, don't clip
        anything.

        gdb/doc/
        * gdb.texinfo (Memory Access Checking): New.