diff options
Diffstat (limited to 'gdb/doc')
| -rw-r--r-- | gdb/doc/gdb.texinfo | 37 |
1 files changed, 34 insertions, 3 deletions
diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo index 82a617e..31a531e 100644 --- a/gdb/doc/gdb.texinfo +++ b/gdb/doc/gdb.texinfo @@ -44093,6 +44093,35 @@ although this should not happen given @value{GDBN} will only send this packet if the stub has advertised support for memory tagging via @samp{qSupported}. @end table +@cindex check if a given address is in a memory tagged region +@cindex @samp{qIsAddressTagged} packet +@item qIsAddressTagged:@var{address} +@anchor {qIsAddressTagged} +Check if address @var{address} is in a memory tagged region; if it is, it's +said to be @dfn{tagged}. The target is responsible for checking it, as this +is architecture-specific. + +@var{address} is the address to be checked. + +Reply: +@table @samp +Replies to this packet should all be in two hex digit format, as follows: + +@item @samp{01} +Address @var{address} is tagged. + +@item @samp{00} +Address @var{address} is not tagged. + +@item E @var{nn} +An error occurred whose code is @var{nn}. This means that address could not +be checked for some reason. + +@item @w{} +An empty reply indicates that @samp{qIsAddressTagged} is not supported by the +stub. +@end table + @item QMemTags:@var{start address},@var{length}:@var{type}:@var{tag bytes} @anchor{QMemTags} @cindex store memory tags @@ -45141,9 +45170,11 @@ The remote stub supports and implements the required memory tagging functionality and understands the @samp{qMemTags} (@pxref{qMemTags}) and @samp{QMemTags} (@pxref{QMemTags}) packets. -For AArch64 GNU/Linux systems, this feature also requires access to the -@file{/proc/@var{pid}/smaps} file so memory mapping page flags can be inspected. -This is done via the @samp{vFile} requests. +For AArch64 GNU/Linux systems, this feature can require access to the +@file{/proc/@var{pid}/smaps} file so memory mapping page flags can be +inspected, if @samp{qIsAddressTagged} (@pxref{qIsAddressTagged}) packet +is not supported by the stub. Access to the @file{/proc/@var{pid}/smaps} +file is done via @samp{vFile} requests. @end table |