* 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.

match the sa_sigaction argument types.  Adjust code appropriately to
use os_context_t appropriately too.

Linux-os.c:
o Fix warning about pointer to int warning.

lisp.c:
o Linux needs time.h to define tzset.
o Fix warning about unused result from getwcd.  If getcwd fails, we
  now just exit with a message because we can't find anything.

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.

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.

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.

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.

amd64-dd-branch.

sources.  No real attempt has been made to make it work, but the
cross-compile does create a kernel.core, and the C code compiles (on
openSuSE 10.3).  The resulting kernel.core does not yet work.

Use cross-x86-amd64.lisp as the cross-compile script.  This is
intended to be cross-compiled using the 20a release for Linux, and
only supports x87.  The sse2 support has not be ported yet.

tools/cross-scripts/cross-x86-amd64.lisp:
o Update cross-compile with some missing constants, and frob new
  symbols.

tools/clean-target.sh:
o Remove amd64f files too.

code/pred.lisp:
o Define predicates for double-doubles for bootstrapping to work
  around recursive known function problems with these predicates.

code/sap.lisp:
o Define int-sap with (unsigned-byte 64) type declaration.  (May not
  be needed?)

code/unix-glibc2.lisp:
o Build fails defining map_failed to (int-sap -1).  Just hard-wire to
  0 for now so we can build.

compiler/float-tran.lisp:
o Add missing conditional for %complex-double-double-float.

compiler/amd64/float.lisp:
o Merge double-double support for amd64.  Not really tested yet.

compiler/amd64/parms.lisp:
o Update to match x86 build.  In particular, get the space address
  correct and update the static symbols.

compiler/amd64/type-vops.lisp:
o DYLAN-FUNCTION-HEADER-TYPE no longer exists.

compiler/amd64/vm.lisp:
o Add double-double storage classes and register definitions.

lisp/Config.amd64:
o Bring in line with Config.x86 and friends.

lisp/Linux-os.c:
o Bring amd64 code up-to-date with x86/linux code.

lisp/Linux-os.h
o Need to include sys/ucontext.h to get ucontext defined.  (Why?)
o Also define __USE_GNU so we get the register offsets in the ucontext
  defined.  (Why?)

lisp/amd64-arch.c:
o Change struct sigcontext to os_context_t.
o Use SC_PC instead of context->sc_pc.
o Merge some changes in from x86 version, like SC_EFLAGS.  May need
  more work.

lisp/amd64-assem.s:
o Use rbx instead of ebx for jmp.

lisp/amd64-lispregs.h:
o Define SC_REG, SC_PC, SC_SP using the new x86 style.

lisp/backtrace.c:
o Remove inline assembly for now until I figure out what the amd64
  version should be.

lisp/gencgc.c:
o Conditionalize out weak hash table support for now.

lisp/gencgc.h:
o Set PAGE_SIZE for amd64.  (Is 4096 right?)

lisp/globals.h:
o Export current_dynamic_space_free_pointer and
  current_auto_gc_trigger like for x86.

use arch_support_sse2 here in case we're running an x87 core on a chip
with SSE2 support.

* code/exports.lisp -- Added a missing quote characher.
* lisp/FreeBSD-os.c -- Fixed the switch to the SSE2 mode, in line with other OSes.
* lisp/Linux-os.c -- Fixed a comment (sse != sse2)

Use bootstrap-2009-01-1.lisp to bootstrap this change.

code/float-trap.lisp:
o FLOATING-POINT-MODES for :X87 needs to massage the results into the
  expected format (SSE2 MXCSR order).
o Update for changed VOP names too.

compiler/x86/float.lisp:
o Rename the floating-point-modes and set-floating-point-modes VOPS to
  x87-floating-point-modes and set-x87-floating-point-modes.  Change
  the translations accordingly too.

compiler/x86/parms.lisp:
o The float property bytes have been updated to match the SSE2 MXCSR
  register for both SSE2 and X87 builds because the code assumes SSE2
  format.

lisp/Linux-os.c:
o Don't OR in the SSE2 modes if we're not running an SSE2 build.
  Doing this can erroneously mask out exceptions because the Lisp code
  didn't set up the sse2 modes.  (This happens if you select the x87
  core on a chip that supports sse2.)

lisp/globals.h:
o Declare fpu_mode.

lisp/lisp.c:
o Set fpu_mode to be the mode determined from the core file.  Needed
  in Linux-os.c to process the SSE2 modes correctly with an x87 core
  on a sse2-capable chip.

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

sse2-packed-2008-11-12).

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.

h_errno.  Like errno, it is left unspecified whether h_errno is a
macro or an identifier declared with external linkage.  Let the C
compiler sort this out for us.

sigcontext before calling back into Lisp.  The rounding mode is always
set correctly when we reenter Lisp through call_into_lisp.  We now
ensure that the trap bits enabled by the user are also preserved.

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

quoted include with an include of the system signal.h where needed.

sigset_t is different from the one used in the Linux kernel.  This means
that we cannot make assignments of sigset_t objects without corrupting
memory.  To work around this problem we update uc_sigmask differently
on Linux than on other systems.  Also, remove x87 control word updates
since the x87 is setup correctly inside call_into_lisp.

reg_NARGS macro on these targets and use SC_REG to replace open-coded
assignments to platform specific sigcontext members in interrupt.c and
os-common.c.  This code could be simplified further by merging the x86
and AMD64 cases into the general case.

o Add function get_h_errno to extract h_errno.

code/internet.lisp:
o On Linux, call the get_h_errno function to get h_errno instead of
  calling __h_errno_location ourselves since that's not part of the
  public API.

.indent.pro.

can't allocate at the desired address, produce an error message and
die gracefully.

From James Y Knight, cmucl-imp, 2005/03/11

    on Linux/x86, the Lisp signal handler for SIGSEGV overwrites the
    beginning of the control stack.

    For SIGSEGV we use an extra signal stack and when the signal isn't
    handled by the GC or by the stack overflow handler we call eventually
    call_into_lisp.  call_into_lisp tests whether the current stack
    pointer points to the normal control stack.  But the test fails
    because we use the extra signal stack, so call_into_lisp just sets the
    stack pointer to the beginning of the normal control stack. This is
    not much fun for debugging because the backtrace is truncated and it's
    also no longer possible to throw to the top-level-catcher because its
    frame was overwritten.

    I tried to fix that with the patch below.  The idea is to switch back
    to the normal stack before calling the Lisp handler.  The patch may
    not be very elegant but it is at least short  :) .

double-float-epsilon actually be epsilon on x86.  No effect on other
ports.

The default precision is now 53-bit (double-float) instead of 64-bit
(80-bit floats).  However, to preserve C expectations, all calls to C
have the precision set to 64-bit.  This slows down calls to C, but we
try to make syscalls and such fast by not changing precision for the
call.

By default ext:float-accuracy is 3.

Use boot7.lisp to bootstrap.

conversions to pointers from ints.  Correct the return type of
sigsegv_handle_now.

weren't caused by a write-protected heap.  Requested by Lynn Quam.