New mtag commands

Add new commands under the "mtag" prefix to allow users to inspect, modify and
check memory tags in different ways.

The available subcommands are the following:

- mtag showltag <address>: Shows the logical tag for a particular address.

- mtag setltag <address> <tag>: Prints the address tagged with the logical tag
  <tag>

- mtag showatag <address>: Shows the allocation tag for a particular address.

- mtag setatag <address> <length> <tags>: Sets one or more allocation tags to
  the specified tags.

- mtag check <address>: Check if the logical tag in <address> matches its
  allocation tag.

These commands make use of the memory tagging gdbarch methods, and are still
available, but disabled, when memory tagging is not supported by the
architecture.

gdb/ChangeLog:

YYYY-MM-DD  Luis Machado  <luis.machado@linaro.org>

	* printcmd.c: Include gdbsupport/rsp-low.h.
	(mtaglist): New static global.
	(process_print_command_args): Factored out of
	print_command_1.
	(print_command_1): Use process_print_command_args.
	(show_addr_not_tagged, show_memtag_unsupported, mtag_command)
	(mtag_showtag_command, mtag_showltag_command, mtag_showatag_command)
	(parse_setltag_input, mtag_setltag_command, parse_setatag_input)
	(mtag_setatag_command, mtag_check_command): New functions.
	(_initialize_printcmd): Add "mtag" prefix and subcommands.

gdbsupport/ChangeLog:

YYYY-MM-DD  Luis Machado  <luis.machado@linaro.org>

	* rsp-low.cc (fromhex): Change error message text to not be
	RSP-specific.

0 files changed, 0 insertions, 0 deletions