gdbarch: add addressable_memory_unit_size method

Add a new gdbarch method to get the length of an addressable memory unit
for a given architecture. The default implementation returns 1.

gdb/ChangeLog:

	* arch-utils.h (default_addressable_memory_unit_size): New.
	* arch-utils.c (default_addressable_memory_unit_size): New.
	* gdbarch.sh (addressable_memory_unit_size): New.
	* gdbarch.h: Re-generate.
	* gdbarch.c: Re-generate.

1 files changed, 6 insertions, 0 deletions

diff --git a/gdb/gdbarch.sh b/gdb/gdbarch.sh
index a3c903e745..6c5d684b4d 100755
--- a/gdb/gdbarch.sh
+++ b/gdb/gdbarch.sh
@@ -1113,6 +1113,12 @@ m:char *:gcc_target_options:void:::default_gcc_target_options::0
 # returns the BFD architecture name, which is correct in nearly every
 # case.
 m:const char *:gnu_triplet_regexp:void:::default_gnu_triplet_regexp::0
+
+# Return the size in 8-bit bytes of an addressable memory unit on this
+# architecture.  This corresponds to the number of 8-bit bytes associated to
+# each address in memory.
+m:int:addressable_memory_unit_size:void:::default_addressable_memory_unit_size::0
+
 EOF
 }