Commit: ARM SIM: Add tracing support.

[Nick Clifton]

Hi Guys,

  I am applying the attached patch to add tracing support to the ARM
  simulator.  With the patch applied three new command line options are
  now supported: -t enables tracing, -d enables disassembly and -z
  enables a limited form of tracing which just reports function entry
  and exits.

  In the course of testing this patch I also came across a variety of
  compile time warning messages.  So the patch also tidies these up,
  just to make things clean and proper.

Cheers
  Nick

sim/arm/ChangeLog
2014-03-14  Nick Clifton  <nickc@redhat.com>

	* wrapper.c (op_print): New function.
	(sim_dis_read): New function.
	(print_insn): New function - disassembles the given instruction.
	(sim_trace): Note that tracing is now allowed.
	(sim_create_inferior): Default to emulating v6.
	Initialise the disassembler machinery.
	(sim_target_parse_command_line): Add support for -t -d and -z
	options.
	(sim_target_display_usage): Note existence of -d and -z options.
	(sim_open): Parse -t -d and -z options.
	* armemu.h: Add exports of trace, disas and trace_funcs.
	Add prototype for print_insn.
	* armemu.c (ARMul_Emulate26): Add tracing code.
	Delete unused variables.
	* thumbemu (handle_v6_thumb_insn): Delete unused variable Rd.
	Move Rm variable into switch cases.
	Add tracing code.

	* armcopro.c (XScale_cp15_init): Add a return value.
	(XScale_cp13_init): Likewise.
	(XScale_cp14_init): Likewise.
	(XScale_cp15_LDC): Delete unused function.
	(XScale_cp15_STC): Likewise.
	* maverick.c: Delete comment inside comment.
	(DSPInit): Delete unused function.
	(DSPMCR4): Fix compile time warning about missing parenthesis.
	(DSPMCR5): Likewise.
	(DSPCDP6): Delete unused variable opcode2.

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