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Fix PR remote/9053: remove dead code on query packet size

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The code becomes dead as GDB evolves.  In 2003, Andrew Cagney post patch
https://sourceware.org/ml/gdb-patches/2003-10/msg00511.html to add target
read/write partial methods.  They support query buffer size when both
OFFSET and LEN is zero, and it was used in avr-tdep.c and kod.c.  Then,
Daniel added target_read_object_alloc and avr-tdep.c switches to use that
in patch https://sourceware.org/ml/gdb-patches/2006-07/msg00009.html
From then on, GDB on longer queries the buffer size, so the code
returning packet size in remote_xfer_partial became dead.

PR 17060 is duplicated of PR 9053, so I mention the latter in the
ChangeLog entry.  Rebuild GDB with this patch.  OK to apply?
I'll mark PR 17060 as duplicated once the patch is applied.

gdb:

2014-08-09  Yao Qi  <yao@codesourcery.com>

	PR remote/9053
	* remote.c (remote_xfer_partial): Remove dead code.
This commit is contained in:
Yao Qi 2014-08-08 13:45:23 +08:00
parent 20c6f1e176
commit dcd2e6ef22
2 changed files with 5 additions and 4 deletions
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5
gdb/ChangeLog
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@ -1,3 +1,8 @@
2014-08-09 Yao Qi <yao@codesourcery.com>
PR remote/9053
* remote.c (remote_xfer_partial): Remove dead code.
2014-08-07 Andreas Arnez <arnez@linux.vnet.ibm.com>
* ia64-linux-tdep.c: Include "regset.h".

4
gdb/remote.c
View File

@ -8863,10 +8863,6 @@ remote_xfer_partial (struct target_ops *ops, enum target_object object,
return TARGET_XFER_E_IO;
}
/* Note: a zero OFFSET and LEN can be used to query the minimum
buffer size. */
if (offset == 0 && len == 0)
return (get_remote_packet_size ());
/* Minimum outbuf size is get_remote_packet_size (). If LEN is not
large enough let the caller deal with it. */
if (len < get_remote_packet_size ())