All,

The attached patch adds support for VFP registers to GDB running
natively under ARM Linux.  The patch is based in large part on the
equivalent functionality in gdbserver for remote debugging of ARM Linux.

I have tested it with arm-unknown-linux-gnueabi on a target with Neon,
one with VFPv3-D16, one with VFPv2, and a target without VFP.  I have
also tested it on arm-none-linux on a target without VFP.  The patch has
not been tested on an XScale as I do not have access to an appropriate
device.

Can someone please review the patch, comment, and if appropriate commit
it?

Proposed ChangeLog: 

2010-03-01  Matthew Gretton-Dann  <matthew.gretton-dann@arm.com>

	* arm-tdep.h (gdb_regnum): Add ARM_FPSCR_REGNUM
	* arm-linux-nat.c (arm_linux_vfp_register_count): Add new
	variable.
	(fetch_vfp_registers): New function to fetch VFP registers.
	(store_vfp_registers): New function to store VFP registers.
	(arm_linux_fetch_inferior_registers): Add support for VFP
	registers.
	(arm_linux_store_inferior_registers): Likewise.
	(arm_linux_read_description): Likewise.
	(arm_read_auxv, arm_get_hwcap): New function.
	(_initialize_arm_linux_nat): Delay initialising iWMMX tdesc
	until we need it.

Thanks,

Matt

-- 
Matthew Gretton-Dann
Principal Engineer - Tools, PD Software
ARM Limited