The commit
d309493 target: consider addressable unit size when reading/writing
memory
introduced the possibility of reading memory of targets with
non-8-bit-bytes (e.g. memories that store 16 bits at each address).
The documentation of target_read and target_write was updated
accordingly, but to_xfer_partial, which is very related, wasn't
updated.
This commit fixes that.
gdb/ChangeLog:
* target.h (struct target_ops) <to_xfer_partial>: Update doc to
talk about addressable units instead of bytes.
---
gdb/target.h | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/gdb/target.h b/gdb/target.h
index a971adf..d46211e 100644
--- a/gdb/target.h
+++ b/gdb/target.h
@@ -712,22 +712,25 @@ struct target_ops
CORE_ADDR offset)
TARGET_DEFAULT_NORETURN (generic_tls_error ());
- /* Request that OPS transfer up to LEN 8-bit bytes of the target's
- OBJECT. The OFFSET, for a seekable object, specifies the
+ /* Request that OPS transfer up to LEN addressable units of the
target's
+ OBJECT. When reading from a memory object, the size of an
addressable
+ unit is architecture dependent and can be found using
+ gdbarch_addressable_memory_unit_size. Otherwise, an
addressable unit is
+ 1 byte long. The OFFSET, for a seekable object, specifies the
starting point. The ANNEX can be used to provide additional
data-specific information to the target.
Return the transferred status, error or OK (an
- 'enum target_xfer_status' value). Save the number of bytes
+ 'enum target_xfer_status' value). Save the number of
addressable units
actually transferred in *XFERED_LEN if transfer is successful
- (TARGET_XFER_OK) or the number unavailable bytes if the
requested
+ (TARGET_XFER_OK) or the number unavailable units if the
requested
data is unavailable (TARGET_XFER_UNAVAILABLE). *XFERED_LEN
smaller than LEN does not indicate the end of the object, only
the end of the transfer; higher level code should continue
transferring if desired. This is handled in target.c.
The interface does not support a "retry" mechanism. Instead it
- assumes that at least one byte will be transfered on each
+ assumes that at least one addressable unit will be transfered
on each
successful call.
NOTE: cagney/2003-10-17: The current interface can lead to