class regcache_read and Pass regcache_read to gdbarch methods
pseudo registers are either from raw registers or memory, so
gdbarch methods pseudo_register_read and pseudo_register_read_value
should have regcache object which only have read methods. In other
words, we should disallow writing to regcache in these two gdbarch
methods. In order to apply this restriction, this patch adds a new
class regcache_read, derived from reg_buffer, and it only has
raw_read and cooked_read methods. regcache is derived from
regcache_read. This patch also passes regcache_read instead of
regcache to gdbarch methods pseudo_register_read and
pseudo_register_read_value.
This patch moves raw_read* and cooked_read* methods to regcache_read,
which is straightforward. One thing not straightforward is that I split
regcache::xfer_part to regcache_read::read_part and regcache::write_part,
because regcache_read can only have methods to read.
regcache_read is an abstract base class, and it has a pure virtual
function raw_update, because I don't want regcache_read know where these
raw registers are from. They can be from either the target (readwrite
regcache) or the regcache itself (readonly regcache).
projects / thirdparty / binutils-gdb.git / commit
