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New target methods for memory tagging support

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This patch starts adding some of the generic pieces to accomodate memory
tagging.

We have three new target methods:

- supports_memory_tagging: Checks if the target supports memory tagging. This
  defaults to false for targets that don't support memory tagging.

- fetch_memtags: Fetches the allocation tags associated with a particular
  memory range [address, address + length).

  The default is to return 0 without returning any tags. This should only
  be called if memory tagging is supported.

- store_memtags: Stores a set of allocation tags for a particular memory
  range [address, address + length).

  The default is to return 0. This should only
  be called if memory tagging is supported.

gdb/ChangeLog:

2021-03-24  Luis Machado  <luis.machado@linaro.org>

	* remote.c (remote_target) <supports_memory_tagging>: New method
	override.
	<fetch_memtags>: New method override.
	<store_memtags>: New method override.
	(remote_target::supports_memory_tagging): New method.
	(remote_target::fetch_memtags): New method.
	(remote_target::store_memtags): New method.
	* target-delegates.c: Regenerate.
	* target.h (struct target_ops) <supports_memory_tagging>: New virtual
	method.
	<fetch_memtags>: New virtual method.
	<store_memtags>: New virtual method.
	(target_supports_memory_tagging): Define.
	(target_fetch_memtags): Define.
	(target_store_memtags): Define.
	* target-debug.h (target_debug_print_size_t)
	(target_debug_print_const_gdb_byte_vector_r)
	(target_debug_print_gdb_byte_vector_r): New functions.
This commit is contained in:
Luis Machado
2020-06-19 17:31:23 -03:00
parent 9a182d0461
commit dbe692af2d
5 changed files with 215 additions and 0 deletions
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24
gdb/target-debug.h
View File

@ -212,4 +212,28 @@ target_debug_print_signals (gdb::array_view<const unsigned char> sigs)
fputs_unfiltered (" }", gdb_stdlog);
}
static void
target_debug_print_size_t (size_t size)
{
fprintf_unfiltered (gdb_stdlog, "%s", pulongest (size));
}
static void
target_debug_print_const_gdb_byte_vector_r (const gdb::byte_vector &vector)
{
fputs_unfiltered ("{", gdb_stdlog);
for (size_t i = 0; i < vector.size (); i++)
{
fprintf_unfiltered (gdb_stdlog, " %s",
phex_nz (vector[i], 1));
}
fputs_unfiltered (" }", gdb_stdlog);
}
static void
target_debug_print_gdb_byte_vector_r (gdb::byte_vector &vector)
{
target_debug_print_const_gdb_byte_vector_r (vector);
}
#endif /* TARGET_DEBUG_H */