remote: consider addressable unit size when reading/writing memory

Adapt code in remote.c to take into account addressable unit size when
reading/writing memory.

A few variables are renamed and suffixed with _bytes or _units. This
way, it's more obvious if there is any place where we add or compare
values of different kinds (which would be a mistake).

gdb/ChangeLog:

	* common/rsp-low.c (needs_escaping): New.
	(remote_escape_output): Add unit_size parameter. Refactor to
	support multi-byte addressable units.  Rename parameters.
	* common/rsp-low.h (remote_escape_output): Add unit_size
	parameter and rename others. Update doc.
	* remote.c (align_for_efficient_write): New.
	(remote_write_bytes_aux): Add unit_size parameter and use it.
	Rename some variables.  Update doc.
	(remote_xfer_partial): Get unit size and use it.
	(remote_read_bytes_1): Add unit_size parameter and use it.
	Rename some variables. Update doc.
	(remote_write_bytes): Same.
	(remote_xfer_live_readonly_partial): Same.
	(remote_read_bytes): Same.
	(remote_flash_write): Update call to remote_write_bytes_aux.
	(remote_write_qxfer): Update call to remote_escape_output.
	(remote_search_memory): Same.
	(remote_hostio_pwrite): Same.

gdb/gdbserver/ChangeLog:

	* server.c (write_qxfer_response): Update call to
	remote_escape_output.

1 files changed, 2 insertions, 2 deletions

diff --git a/gdb/gdbserver/server.c b/gdb/gdbserver/server.c
index 01b9c96..c9effc2 100644
--- a/gdb/gdbserver/server.c
+++ b/gdb/gdbserver/server.c
@@ -387,8 +387,8 @@ write_qxfer_response (char *buf, const void *data, int len, int is_more)
   else
     buf[0] = 'l';
 
-  return remote_escape_output (data, len, (unsigned char *) buf + 1, &out_len,
-			       PBUFSIZ - 2) + 1;
+  return remote_escape_output (data, len, 1, (unsigned char *) buf + 1,
+			       &out_len, PBUFSIZ - 2) + 1;
 }
 
 /* Handle btrace enabling in BTS format.  */