[PATCHv3 2/2] gdb: Initial baremetal riscv support

[Eli Zaretskii]

> From: Andrew Burgess <andrew.burgess@embecosm.com>
> Cc: Simon Marchi <simark@simark.ca>,
> 	Eli Zaretskii <eliz@gnu.org>,
> 	Andrew Burgess <andrew.burgess@embecosm.com>
> Date: Fri,  2 Mar 2018 20:09:49 +0000
> 
> This commit introduces basic support for baremetal RiscV as a GDB
> target.  This target is currently only tested against the RiscV software
> simulator, which is not included as part of this commit.  The target has
> been tested against the following RiscV variants: rv32im, rv32imc,
> rv32imf, rv32imfc, rv64im, rv64imc, rv64imfd, rv64imfdc.
> 
> Across these variants we pass on average 34858 tests, and fail 272
> tests, which is ~0.8%.
> 
> The RiscV has a feature of its ABI where structures with a single
> floating point field, a single complex float field, or one float and one
> integer field are treated differently for argument passing.  The new
> test gdb.base/nested-structs.exp is added to cover this feature.  As
> passing these structures should work on all targets then I've made the
> test as a generic one, even though, for most targets, there's probably
> nothing special about any of these cases.
> 
> gdb/ChangeLog:
> 
> 	* Makefile.in (ALL_TARGET_OBS): Add riscv-tdep.o
> 	(HFILES_NO_SRCDIR): Add riscv-tdep.h.
> 	(ALLDEPFILES): Add riscv-tdep.c
> 	* configure.tgt: Add riscv support.
> 	* riscv-tdep.c: New file.
> 	* riscv-tdep.h: New file.
> 	* NEWS: Mention new target.
> 	* MAINTAINERS: Add entry for riscv.
> 
> gdb/testsuite/ChangeLog:
> 
> 	* gdb.base/nested-structs.exp: New file.
> 	* gdb.base/nested-structs.c: New file.
> 	* gdb.base/float.exp: Add riscv support.

The documentation part is OK.

Thanks.