util: fix apparent statetrace bug

In the process of trying to eliminate boolean comparisons,
I ran across this statement that appears to be a bug
(should have been an assignment).

style: fix missing spaces in control statements

Result of running 'hg m5style --skip-all --fix-control -a'.

style: remove trailing whitespace

Result of running 'hg m5style --skip-all --fix-white -a'.

ARM: Add vfpv3 support to native trace.

includes: sort all includes

Statetrace: Stub out the missing i386 version of sendState.

Statetrace: Rename i386 to i686.

Statetrace: Fix the i686 detection macro.

Statetrace: Use sys/user.h instead of linux/user.h.

Statetrace: Tweak the help for the -nt option.

Statetrace: Accomodate cross compiling statetrace with scons.

Statetrace: Convert the build to scons.

Statetrace: Allow the user to override CXX.

Statetrace: Get rid of explicit register name handling.

Statetrace: Kill the printer functionality in statetrace.

Statetrace: Clean up style.

ARM: Fixup native trace support and add some v7/recent stack code

Statetrace: Fix compile problems with the AMD64 version of statetrace.

Statetrace: Make sure the current state is loaded to print the initial stack frame.
The early call to child->step() was removed earlier because it confused the
new differences-only protocol ARM sendState() was using. It's necessary that
that gets called at least once before attempting to print the initial stack
frame, though, because otherwise statetrace doesn't know what the stack
pointer is. By putting the first call to child->step() in a common spot, both
needs are met.

ARM: Make sure the target process doesn't run away from statetrace.

ARM: Only send information that changed between statetrace and M5.

imported patch statetracehost.patch

ARM: Add ARM support to statetrace.

Statetrace: Fix up headers.

includes: sort includes again

X86/StateTrace: Make m5 and statetrace track mmx and xmm registers, and actually compare xmm.

Statetrace: Make statetrace do string instructions all at once like m5 does.

Statetrace: Make sure all the info block strings are printed.

Statetrace: Make statetrace patch amd64 executables for true single stepping after system calls.
Because of peculiarities in how system calls are returned from, single stepping executes some system calls and the instruction following them in a single step. Statetrace now patches the executable image when it detects a system call to force "correct" behavior, aka the appearance of stepping one instruction every single time.

Statetrace: Print the correct address of auxiliary vectors.
The address of the stackpointer proceeding the vector minus 8 should be minus 16.

Statetrace: Implement the AMD64 version of TraceChild.

Statetrace: Fix indendation. Set the default hostname to "localhost" instead of my machine at UM.

Statetrace: Fix compilation problem.

Update to statetrace. This will break it, but I want to make sure it gets into mercurial.

Fixing statetrace to work with 32 bit SPARC processes, as well as rewritting it's single stepping code.

Cleaned up the function a bit to help route out bugs.

Fixed up exetrace.cc to deal with microcode, and to made floating point register numbers correlate to the numbers used in SPARC in m5 and statetrace.

src/cpu/exetrace.cc:
Fixed up to deal with microcode, and to make floating point register numbers correlate to the numbers used in SPARC.
util/statetrace/arch/tracechild_sparc.cc:
util/statetrace/arch/tracechild_sparc.hh:
Make floating point register numbers correlate to the numbers used in SPARC.

Adding what was tracedump but is now statetrace to the tree. Let me know if statetrace is also already taken.

util/statetrace/Makefile:
Makefile to build statetrace. Targets are:

statetrace: alias to build using the "native" compiler
statetrace-native: use the native compiler
statetrace-sparc: use the sparc cross compiler

I'll make this a little more fancy and capable later.
util/statetrace/arch/tracechild_i386.cc:
Implementation of i386 support
util/statetrace/arch/tracechild_i386.hh:
Declaration of i386 support
util/statetrace/arch/tracechild_sparc.cc:
implementation of SPARC support
util/statetrace/arch/tracechild_sparc.hh:
declaration of SPARC support
util/statetrace/printer.cc:
Implementation of the "Printer" objects which parse and output the state of the process after each instruction. There are currently two types of printers, nested ones and register ones. These are called NestingPrinter and RegPrinter respectively.
util/statetrace/printer.hh:
Declaration of "Printer" objects
util/statetrace/refcnt.hh:
This is copied from m5. I should use the one already in the tree, but I'll do that later.
util/statetrace/regstate.hh:
Interface for accessing registers.
util/statetrace/statetrace.cc:
Main file with argument parsing and the "main" function which contains the tracing loop.
util/statetrace/tracechild.cc:
Implementation of the base tracechild class.
util/statetrace/tracechild.hh:
Declaration of the base tracechild class.
util/statetrace/tracechild_arch.cc:
This file hooks in support for the appropriate architecture. Just the implementation is brought in, since the main program should ideally not have to know anything at all about an architecture other than it's interface.
util/statetrace/x86.format:
An example output template for x86. A few example SPARC templates will be added later.