* Get rid of the RCS Header stuff.  They're meaningless in git.
 * Add public domain comment to some of the files if the only comment
   was the RCS header.

to work with ppc.

builds, though.

Make the size of all spaces configurable from the command line.

code/commandline.lisp:
o Define the switches so lisp doesn't complain.

general-info/lisp.1:
o Document new switches.

general-info/release-20c.txt:
o Update

lisp/Darwin-os.c
lisp/FreeBSD-os.c
lisp/Linux-os.c
lisp/NetBSD-os.c
lisp/backtrace.c
lisp/cgc.c
lisp/gencgc.c
lisp/os-common.c
lisp/ppc-validate.h
lisp/purify.c
lisp/solaris-os.c
lisp/sparc-arch.c
lisp/sparc-validate.h
lisp/x86-validate.h:
lisp/validate.c
o Basically rename CONTROL_STACK_SIZE, BINDING_STACK_SIZE,
  READ_ONLY_SPACE_SIZE, and STATIC_SPACE_SIZE to control_stack_size,
  binding_stack_size, read_only_space_size, and static_space_size,
  respectively.

lisp/coreparse.c
o Check the space size in the core file against the allocated size.
  If the allocated space is too small, print an error message and
  exit.

lisp/globals.c
o Define new variables for the allocated size of spaces.

lisp/globals.h
o Declare the new variables for the size of the spaces.

lisp/lisp.c
o Set the default values of the spaces.
o Parse the new command-line flags and set the space sizes.

lisp/sunos-os.c:
o Added os_init0 (that we forgot last time).

lisp/x86-assem.S:
o Change $CONTROL_STACK_END to GNAME(control_stack_end) to get the
  correct end of the stack.

We don't need sigbus_handler_tramp; sigbus_handle_now is good enough.
Print out the PC too when we get a real sigbus.

On Linux, os_init can re-exec lisp to set up the correct personality.
Not normally a problem, but if any output happens before os_init is
called, the output appears to happen twice.  So add os_init0 to do
this early on, before any output.  This is a bit of a kludge.

lisp/lisp.c:
o Call os_init0 early in main.

lisp/Linux-os.c:
o Move the personality stuff from os_init to os_init0.

lisp/Darwin-os.c:
lisp/FreeBSD-os.c:
lisp/NetBSD-os.c:
lisp/OpenBSD-os.c:
lisp/hpux-os.c:
lisp/irix-os.c:
lisp/mach-os.c:
lisp/osf1-os.c:
lisp/solaris-os.c:
lisp/sunos-os.c:
o Add dummy implementation of os_init0.  These OSes don't (currently)
  need anything special.

lisp/os.h:
o Declare os_init0.

stack overflows would crash lisp.

Darwin-os.c:
o Need to check for stack overflow in the sigbus handler.  (Without
  that, it's treated as a regular bus error.)
o Add the rest of the infrastructure to handle the stack overflow.

release-20c.txt:
o Update

registers. The test is a stub on everything except NetBSD for now.

compiler/x86/vm.lisp:
o Change *float-register-names* to be defparameter.
o Setup float-regs and def-random-reg-tns appropriately for x87 and
  sse2.

lisp/Darwin-os.c:
lisp/Linux-os.c:
o Conditionalize previous change for FEATURE_SSE2.

Carl's suggestion and define new SC numbers for the xmm registers
instead of overloading the x87 fpu registers and the xmm register
SC's.

bootfiles/20a/boot-2010-06-cross-x86.lisp:
o New file needed for cross-compiling this change.

code/x86-vm.lisp:
o Revert previous change.

compiler/x86/sse2-c-call.lisp:
o Use xmm0-tn instead of fr0-tn.  No functional change, but makes the
  code more readable.

compiler/x86/vm.lisp:
o Increase the number of float registers from 8 to 16 (8 more for SSE2
  registers).
o Define new xmm<n> registers
o Update the locations with the new sse2 SC locations for single-reg,
  double-reg, double-double-reg, complex-single-reg,
  complex-double-reg, and complex-double-double-reg storage classes.

lisp/Darwin-os.c:
o Revert previous change.
o Update os_sigcontext_fpu_reg to support the xmm registers.

lisp/Linux-os.c:
o Update os_sigcontext_fpu_reg to support the xmm registers.

floating-point values for arguments because the x87 registers were
used instead of the sse2 registers in the sigcontext.

code/x86-vm.lisp:
o For SSE2 on Mac OS X, call os_sigcontext_fpu_reg_sse2 to get the
  SSE2 register values from the sigcontext.

lisp/Darwin-os.c:
o Add os_sigcontext_fpu_reg_sse2 to get the SSE2 floating point
  values.

general-info/release-20b.txt:
o Document this change.

o Follow CMUCL coding style.
o Argv and envp are const char*.

os.h:
lisp.c:
Darwin-os.c:
FreeBSD-os.c:
NetBSD-os.c:
OpenBSD-os.c:
hpux-os.c:
irix-os.c:
mach-os.c:
osf1-os.c:
solaris-os.c:
sunos-os.c:
o argv and envp are const char *.

    When run on a kernel compiled without COMPAT_BRK CMUCL segfaults,
    so I copied the kludge used by SBCL - check the current
    personality, and if necessary, enable ADDR_NO_RANDOMIZE and
    re-exec itself.

Linux-os.c:
o Check for personality and rexec if necessary.

os.h:
o New prototype for os_init needed because it needs argv and envp.

lisp.c:
Darwin-os.c:
FreeBSD-os.c:
NetBSD-os.c:
OpenBSD-os.c:
hpux-os.c:
irix-os.c:
mach-os.c:
osf1-os.c:
solaris-os.c:
sunos-os.c:
o Update call to os_init, which needs argv and envp now.

  in other functions too!
o Add in the SSE2 mxcsr register only if we're running an SSE2-enabled
  core.

lisp/Config.x86_darwin:
o Add -mmacosx-version-min=10.4 so the C code can run on Tiger.

lisp/Darwin.c:
lisp/x86-lispregs.h:
o The mcontext slot names have a prefix of "__" on 10.5, but have no
  prefix on 10.4.  Add #define's to make the source code work on either.

x86-vm.lisp declares os_sigcontext_fpu_modes to return a 32-bit int.

sse2-packed-2008-11-12).

gencgc.c:
o Enable page protection

Darwin-os.c:
o Turn on sigbus_handler for x86/darwin.
o Minor tweaks of sigbus_handler for x86/darwin.
o Install the sigbus handler.

interrupt_maybe_gc.

void keyword to specify empty parameter lists.

sigcontext.

This is a workaround for an issue on x86/darwin where loading of the
control word enabling the invalid operation exception would cause that
exception because the status word had that exception.  Not sure why
this is needed or why the invalid operation exception was set.  It was
happening in a call run-program while concatenating the files for the
hemlock library.

code.  Rather than introduce a new FreeBSD case to the x86 sigcontext
member accessor routines, collapse all of the system specific routines
down to a common set of routines.

* code/debug-int.lisp - Disable some Darwin-specific code to debug
  NULL mcontext pointers.

* code/float-trap.lisp - Remove ancient FreeBSD-specific code for
  handling floating point signals.

* code/macros.lisp, code/sap.lisp, compiler/saptran.lisp - Include the
  SAP-REF-LONG setter by default on the x86.

* code/x86-vm.lisp - Remove operating system specific sigcontext
  definitions and sigcontext accessors.  Define the alien sigcontext
  as a system area pointer.  Replace the sigcontext accessors with
  foreign function calls that mask the complexity of the underlying
  sigcontext member access.

* compiler/x86/float.lisp - Unconditionally define STORE-LONG-FLOAT.
  This function is used by the %SET-SAP-REF-LONG VOP that underlies
  the SAP-REF-LONG setter.

* compiler/x86/sap.lisp - Unconditionally define %SET-SAP-REF-LONG.
  In the case where there is not a distinct LONG-FLOAT type, admit
  DOUBLE-FLOAT values instead.  The x87 automatically widens values
  pushed onto stack.  This mirrors the behavior of the SAP-REF-LONG
  VOP.

* lisp/Darwin-os.c, lisp/Linux-os.c - Define functions to access
  sigcontext members of interest to Lisp.  Delete the sc_reg function
  and replace its uses with os_sigcontext_reg which is more suitably
  typed.

* lisp/FreeBSD-os.c - Define functions to access sigcontext members of
  interest to Lisp.  We need to be careful about the SSE and non-SSE
  cases for retrieving x87 registers from the saved machine state.
  Define a low-level SIGFPE handler to intercept floating point traps
  and restore the cleared status word bits based on the signal code.
  Get rid of sc_reg for the reasons noted above.

* lisp/Darwin-os.h, lisp/FreeBSD-os.h - Declare the restore_fpu
  function and define a specialized RESTORE_FPU macro.  Remove the
  sc_reg prototype.

* lisp/Linux-os.h - Remove the sc_reg prototype.

* lisp/os.h - Add prototypes for the new os_sigcontext functions.

* lisp/x86-lispregs.h - Redefine SC_REG and SC_PC to expand out to the
  new os_sigcontext functions.  Redfine SC_SP to expand out to SC_REG.
  Eliminate all platform-specific defintions of SC_PC and SC_SP.

a no-op on all other architectures.  Remove SAVE_CONTEXT references in
places that are not touched by a SPARC target.

errno accessors shared by all ports.  Change the definition of
UNIX:UNIX-ERRNO so that it always calls down to an accessor function.

registers, in case they're pointing into our heap and what they're
pointing to has moved.

lisp/Darwin-os.c:
o Add support for getting the LR and CTR registers from the context.

lisp/gencgc.c:
o Handle LR and CTR registers when scavenging the interrupt context.

lisp/ppc-lispregs.h:
o Define reg_LR and reg_CTR appropriately.

.indent.pro.

where it belongs.