The Arm prologue skipping code is broken on 64-bit hosts. The problem is that 
the opcode is loaded as a signed integer, then stored in an "unsigned long". 
This is then compared against unsigned 32-bit constants.

The attached patch fixes this by reading the instruction as an unsigned value.
For consistency I made the same change in other similar routines.

Tested with cross to arm-none-eabi.
Ok?

Paul

2006-02-15  Paul Brook  <paul@codesourcery.com>

	* arm-tdep.c (arm_skip_prologue, thumb_get_next_pc, arm_get_next_pc):
	Load insn opcodes as unsigned values.