1.0.3.16: experimental x86-64/darwin suport
[sbcl.git] / src / runtime / purify.c
index 677db6d..e753c13 100644 (file)
  * files for more information.
  */
 
-/*
- * $Header$
- */
-
 #include <stdio.h>
 #include <sys/types.h>
 #include <stdlib.h>
+#include <strings.h>
+#include <errno.h>
 
+#include "sbcl.h"
 #include "runtime.h"
 #include "os.h"
-#include "sbcl.h"
 #include "globals.h"
 #include "validate.h"
 #include "interrupt.h"
 #include "purify.h"
 #include "interr.h"
-#ifdef GENCGC
-#include "gencgc.h"
-#endif
+#include "fixnump.h"
+#include "gc.h"
+#include "gc-internal.h"
+#include "thread.h"
+#include "genesis/primitive-objects.h"
+#include "genesis/static-symbols.h"
+#include "genesis/layout.h"
 
-#undef PRINTNOISE
+#define PRINTNOISE
 
-#if defined(ibmrt) || defined(__i386__)
-static lispobj *dynamic_space_free_pointer;
-#endif
-
-#define gc_abort() \
-  lose("GC invariant lost, file \"%s\", line %d", __FILE__, __LINE__)
+extern unsigned long bytes_consed_between_gcs;
 
-#if 1
-#define gc_assert(ex) do { \
-       if (!(ex)) gc_abort(); \
-} while (0)
-#else
-#define gc_assert(ex)
-#endif
+static lispobj *dynamic_space_purify_pointer;
 
 \f
 /* These hold the original end of the read_only and static spaces so
@@ -58,35 +49,32 @@ static lispobj *read_only_end, *static_end;
 
 static lispobj *read_only_free, *static_free;
 
-static lispobj *pscav(lispobj *addr, int nwords, boolean constant);
+static lispobj *pscav(lispobj *addr, long nwords, boolean constant);
 
 #define LATERBLOCKSIZE 1020
 #define LATERMAXCOUNT 10
 
-static struct later {
+static struct
+later {
     struct later *next;
     union {
         lispobj *ptr;
-        int count;
+        long count;
     } u[LATERBLOCKSIZE];
 } *later_blocks = NULL;
-static int later_count = 0;
-
-#define CEILING(x,y) (((x) + ((y) - 1)) & (~((y) - 1)))
-#define NWORDS(x,y) (CEILING((x),(y)) / (y))
+static long later_count = 0;
 
-#ifdef sparc
-#define RAW_ADDR_OFFSET 0
-#else
-#define RAW_ADDR_OFFSET (6*sizeof(lispobj) - type_FunctionPointer)
+#if N_WORD_BITS == 32
+ #define SIMPLE_ARRAY_WORD_WIDETAG SIMPLE_ARRAY_UNSIGNED_BYTE_32_WIDETAG
+#elif N_WORD_BITS == 64
+ #define SIMPLE_ARRAY_WORD_WIDETAG SIMPLE_ARRAY_UNSIGNED_BYTE_64_WIDETAG
 #endif
+
 \f
 static boolean
 forwarding_pointer_p(lispobj obj)
 {
-    lispobj *ptr;
-
-    ptr = (lispobj *)obj;
+    lispobj *ptr = native_pointer(obj);
 
     return ((static_end <= ptr && ptr <= static_free) ||
             (read_only_end <= ptr && ptr <= read_only_free));
@@ -95,127 +83,46 @@ forwarding_pointer_p(lispobj obj)
 static boolean
 dynamic_pointer_p(lispobj ptr)
 {
-#ifndef __i386__
-    /* KLUDGE: This has an implicit dependence on the ordering of
-     * address spaces, and is therefore basically wrong. I'd fix it,
-     * but I don't have a non-386 port to test it on. Porters are
-     * encouraged to fix it. -- WHN 2000-10-17 */
-    return (ptr >= (lispobj)DYNAMIC_SPACE_START);
+#ifndef LISP_FEATURE_GENCGC
+    return (ptr >= (lispobj)current_dynamic_space
+            &&
+            ptr < (lispobj)dynamic_space_purify_pointer);
 #else
     /* Be more conservative, and remember, this is a maybe. */
     return (ptr >= (lispobj)DYNAMIC_SPACE_START
-           &&
-           ptr < (lispobj)dynamic_space_free_pointer);
+            &&
+            ptr < (lispobj)dynamic_space_purify_pointer);
 #endif
 }
 
-\f
-#ifdef __i386__
-
-#ifdef WANT_CGC
-/* original x86/CGC stack scavenging code by Paul Werkowski */
-
-static int
-maybe_can_move_p(lispobj thing)
-{
-  lispobj *thingp,header;
-  if (dynamic_pointer_p(thing)) { /* in dynamic space */
-    thingp = (lispobj*)PTR(thing);
-    header = *thingp;
-    if(Pointerp(header) && forwarding_pointer_p(header))
-      return -1;               /* must change it */
-    if(LowtagOf(thing) == type_ListPointer)
-      return type_ListPointer; /* can we check this somehow */
-    else if (thing & 3) {      /* not fixnum */
-      int kind = TypeOf(header);
-      /* printf(" %x %x",header,kind); */
-      switch (kind) {          /* something with a header */
-      case type_Bignum:
-      case type_SingleFloat:
-      case type_DoubleFloat:
-#ifdef type_LongFloat
-      case type_LongFloat:
-#endif
-      case type_Sap:
-      case type_SimpleVector:
-      case type_SimpleString:
-      case type_SimpleBitVector:
-      case type_SimpleArrayUnsignedByte2:
-      case type_SimpleArrayUnsignedByte4:
-      case type_SimpleArrayUnsignedByte8:
-      case type_SimpleArrayUnsignedByte16:
-      case type_SimpleArrayUnsignedByte32:
-#ifdef type_SimpleArraySignedByte8
-      case type_SimpleArraySignedByte8:
-#endif
-#ifdef type_SimpleArraySignedByte16
-      case type_SimpleArraySignedByte16:
-#endif
-#ifdef type_SimpleArraySignedByte30
-      case type_SimpleArraySignedByte30:
-#endif
-#ifdef type_SimpleArraySignedByte32
-      case type_SimpleArraySignedByte32:
-#endif
-      case type_SimpleArraySingleFloat:
-      case type_SimpleArrayDoubleFloat:
-#ifdef type_SimpleArrayLongFloat
-      case type_SimpleArrayLongFloat:
-#endif
-#ifdef type_SimpleArrayComplexSingleFloat
-      case type_SimpleArrayComplexSingleFloat:
-#endif
-#ifdef type_SimpleArrayComplexDoubleFloat
-      case type_SimpleArrayComplexDoubleFloat:
-#endif
-#ifdef type_SimpleArrayComplexLongFloat
-      case type_SimpleArrayComplexLongFloat:
-#endif
-      case type_CodeHeader:
-      case type_FunctionHeader:
-      case type_ClosureFunctionHeader:
-      case type_ReturnPcHeader:
-      case type_ClosureHeader:
-      case type_FuncallableInstanceHeader:
-      case type_InstanceHeader:
-      case type_ValueCellHeader:
-      case type_ByteCodeFunction:
-      case type_ByteCodeClosure:
-      case type_WeakPointer:
-      case type_Fdefn:
-       return kind;
-       break;
-      default:
-       return 0;
-      }}}
-  return 0;
-}
-
-static int pverbose=0;
-#define PVERBOSE pverbose
-static void
-carefully_pscav_stack(lispobj*lowaddr, lispobj*base)
+static inline lispobj *
+newspace_alloc(long nwords, int constantp)
 {
-  lispobj*sp = lowaddr;
-  while (sp < base)
-    { int k;
-      lispobj thing = *sp;
-      if((unsigned)thing & 0x3)        /* may be pointer */
-       {
-         /* need to check for valid float/double? */
-         k = maybe_can_move_p(thing);
-         if(PVERBOSE)printf("%8x %8x %d\n",sp, thing, k);
-         if(k)
-           pscav(sp, 1, 0);
-       }
-      sp++;
+    lispobj *ret;
+    nwords=CEILING(nwords,2);
+    if(constantp) {
+        if(read_only_free + nwords >= (lispobj *)READ_ONLY_SPACE_END) {
+            lose("Ran out of read-only space while purifying!\n");
+        }
+        ret=read_only_free;
+        read_only_free+=nwords;
+    } else {
+        if(static_free + nwords >= (lispobj *)STATIC_SPACE_END) {
+            lose("Ran out of static space while purifying!\n");
+        }
+        ret=static_free;
+        static_free+=nwords;
     }
+    return ret;
 }
-#endif
 
-#ifdef GENCGC
+
+\f
+#if defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
+
+#ifdef LISP_FEATURE_GENCGC
 /*
- * Enhanced x86/GENCGC stack scavenging by Douglas Crosher.
+ * enhanced x86/GENCGC stack scavenging by Douglas Crosher
  *
  * Scavenging the stack on the i386 is problematic due to conservative
  * roots and raw return addresses. Here it is handled in two passes:
@@ -226,273 +133,339 @@ carefully_pscav_stack(lispobj*lowaddr, lispobj*base)
 
 static unsigned pointer_filter_verbose = 0;
 
+/* FIXME: This is substantially the same code as
+ * possibly_valid_dynamic_space_pointer in gencgc.c.  The only
+ * relevant difference seems to be that the gencgc code also checks
+ * for raw pointers into Code objects, whereas in purify these are
+ * checked separately in setup_i386_stack_scav - they go onto
+ * valid_stack_ra_locations instead of just valid_stack_locations */
+
 static int
 valid_dynamic_space_pointer(lispobj *pointer, lispobj *start_addr)
 {
-  /* If it's not a return address then it needs to be a valid Lisp
-   * pointer. */
-  if (!Pointerp((lispobj)pointer))
-    return 0;
+    /* If it's not a return address then it needs to be a valid Lisp
+     * pointer. */
+    if (!is_lisp_pointer((lispobj)pointer))
+        return 0;
 
-  /* Check that the object pointed to is consistent with the pointer
-   * low tag. */
-  switch (LowtagOf((lispobj)pointer)) {
-  case type_FunctionPointer:
-    /* Start_addr should be the enclosing code object, or a closure
-     * header. */
-    switch (TypeOf(*start_addr)) {
-    case type_CodeHeader:
-      /* This case is probably caught above. */
-      break;
-    case type_ClosureHeader:
-    case type_FuncallableInstanceHeader:
-    case type_ByteCodeFunction:
-    case type_ByteCodeClosure:
-      if ((int)pointer != ((int)start_addr+type_FunctionPointer)) {
-       if (pointer_filter_verbose) {
-         fprintf(stderr,"*Wf2: %x %x %x\n", pointer, start_addr, *start_addr);
-       }
-       return 0;
-      }
-      break;
-    default:
-      if (pointer_filter_verbose) {
-       fprintf(stderr,"*Wf3: %x %x %x\n", pointer, start_addr, *start_addr);
-      }
-      return 0;
-    }
-    break;
-  case type_ListPointer:
-    if ((int)pointer != ((int)start_addr+type_ListPointer)) {
-      if (pointer_filter_verbose)
-       fprintf(stderr,"*Wl1: %x %x %x\n", pointer, start_addr, *start_addr);
-      return 0;
-    }
-    /* Is it plausible cons? */
-    if((Pointerp(start_addr[0])
-       || ((start_addr[0] & 3) == 0) /* fixnum */
-       || (TypeOf(start_addr[0]) == type_BaseChar)
-       || (TypeOf(start_addr[0]) == type_UnboundMarker))
-       && (Pointerp(start_addr[1])
-          || ((start_addr[1] & 3) == 0) /* fixnum */
-          || (TypeOf(start_addr[1]) == type_BaseChar)
-          || (TypeOf(start_addr[1]) == type_UnboundMarker))) {
-      break;
-    } else {
-      if (pointer_filter_verbose) {
-       fprintf(stderr,"*Wl2: %x %x %x\n", pointer, start_addr, *start_addr);
-      }
-      return 0;
-    }
-  case type_InstancePointer:
-    if ((int)pointer != ((int)start_addr+type_InstancePointer)) {
-      if (pointer_filter_verbose) {
-       fprintf(stderr,"*Wi1: %x %x %x\n", pointer, start_addr, *start_addr);
-      }
-      return 0;
-    }
-    if (TypeOf(start_addr[0]) != type_InstanceHeader) {
-      if (pointer_filter_verbose) {
-       fprintf(stderr,"*Wi2: %x %x %x\n", pointer, start_addr, *start_addr);
-      }
-      return 0;
-    }
-    break;
-  case type_OtherPointer:
-    if ((int)pointer != ((int)start_addr+type_OtherPointer)) {
-      if (pointer_filter_verbose) {
-       fprintf(stderr,"*Wo1: %x %x %x\n", pointer, start_addr, *start_addr);
-      }
-      return 0;
-    }
-    /* Is it plausible?  Not a cons. X should check the headers. */
-    if(Pointerp(start_addr[0]) || ((start_addr[0] & 3) == 0)) {
-      if (pointer_filter_verbose) {
-       fprintf(stderr,"*Wo2: %x %x %x\n", pointer, start_addr, *start_addr);
-      }
-      return 0;
-    }
-    switch (TypeOf(start_addr[0])) {
-    case type_UnboundMarker:
-    case type_BaseChar:
-      if (pointer_filter_verbose) {
-       fprintf(stderr,"*Wo3: %x %x %x\n", pointer, start_addr, *start_addr);
-      }
-      return 0;
-
-      /* only pointed to by function pointers? */
-    case type_ClosureHeader:
-    case type_FuncallableInstanceHeader:
-    case type_ByteCodeFunction:
-    case type_ByteCodeClosure:
-      if (pointer_filter_verbose) {
-       fprintf(stderr,"*Wo4: %x %x %x\n", pointer, start_addr, *start_addr);
-      }
-      return 0;
-
-    case type_InstanceHeader:
-      if (pointer_filter_verbose) {
-       fprintf(stderr,"*Wo5: %x %x %x\n", pointer, start_addr, *start_addr);
-      }
-      return 0;
-
-      /* the valid other immediate pointer objects */
-    case type_SimpleVector:
-    case type_Ratio:
-    case type_Complex:
-#ifdef type_ComplexSingleFloat
-    case type_ComplexSingleFloat:
-#endif
-#ifdef type_ComplexDoubleFloat
-    case type_ComplexDoubleFloat:
-#endif
-#ifdef type_ComplexLongFloat
-    case type_ComplexLongFloat:
-#endif
-    case type_SimpleArray:
-    case type_ComplexString:
-    case type_ComplexBitVector:
-    case type_ComplexVector:
-    case type_ComplexArray:
-    case type_ValueCellHeader:
-    case type_SymbolHeader:
-    case type_Fdefn:
-    case type_CodeHeader:
-    case type_Bignum:
-    case type_SingleFloat:
-    case type_DoubleFloat:
-#ifdef type_LongFloat
-    case type_LongFloat:
-#endif
-    case type_SimpleString:
-    case type_SimpleBitVector:
-    case type_SimpleArrayUnsignedByte2:
-    case type_SimpleArrayUnsignedByte4:
-    case type_SimpleArrayUnsignedByte8:
-    case type_SimpleArrayUnsignedByte16:
-    case type_SimpleArrayUnsignedByte32:
-#ifdef type_SimpleArraySignedByte8
-    case type_SimpleArraySignedByte8:
-#endif
-#ifdef type_SimpleArraySignedByte16
-    case type_SimpleArraySignedByte16:
-#endif
-#ifdef type_SimpleArraySignedByte30
-    case type_SimpleArraySignedByte30:
-#endif
-#ifdef type_SimpleArraySignedByte32
-    case type_SimpleArraySignedByte32:
-#endif
-    case type_SimpleArraySingleFloat:
-    case type_SimpleArrayDoubleFloat:
-#ifdef type_SimpleArrayLongFloat
-    case type_SimpleArrayLongFloat:
-#endif
-#ifdef type_SimpleArrayComplexSingleFloat
-    case type_SimpleArrayComplexSingleFloat:
-#endif
-#ifdef type_SimpleArrayComplexDoubleFloat
-    case type_SimpleArrayComplexDoubleFloat:
-#endif
-#ifdef type_SimpleArrayComplexLongFloat
-    case type_SimpleArrayComplexLongFloat:
-#endif
-    case type_Sap:
-    case type_WeakPointer:
-      break;
+    /* Check that the object pointed to is consistent with the pointer
+     * low tag. */
+    switch (lowtag_of((lispobj)pointer)) {
+    case FUN_POINTER_LOWTAG:
+        /* Start_addr should be the enclosing code object, or a closure
+         * header. */
+        switch (widetag_of(*start_addr)) {
+        case CODE_HEADER_WIDETAG:
+            /* This case is probably caught above. */
+            break;
+        case CLOSURE_HEADER_WIDETAG:
+        case FUNCALLABLE_INSTANCE_HEADER_WIDETAG:
+            if ((long)pointer != ((long)start_addr+FUN_POINTER_LOWTAG)) {
+                if (pointer_filter_verbose) {
+                    fprintf(stderr,"*Wf2: %p %p %p\n",
+                            pointer, start_addr, (void *)*start_addr);
+                }
+                return 0;
+            }
+            break;
+        default:
+            if (pointer_filter_verbose) {
+                fprintf(stderr,"*Wf3: %p %p %p\n",
+                        pointer, start_addr, (void *)*start_addr);
+            }
+            return 0;
+        }
+        break;
+    case LIST_POINTER_LOWTAG:
+        if ((long)pointer != ((long)start_addr+LIST_POINTER_LOWTAG)) {
+            if (pointer_filter_verbose)
+                fprintf(stderr,"*Wl1: %p %p %p\n",
+                        pointer, start_addr, (void *)*start_addr);
+            return 0;
+        }
+        /* Is it plausible cons? */
+        if ((is_lisp_pointer(start_addr[0])
+            || ((start_addr[0] & FIXNUM_TAG_MASK) == 0) /* fixnum */
+            || (widetag_of(start_addr[0]) == CHARACTER_WIDETAG)
+#if N_WORD_BITS == 64
+            || (widetag_of(start_addr[0]) == SINGLE_FLOAT_WIDETAG)
+#endif
+            || (widetag_of(start_addr[0]) == UNBOUND_MARKER_WIDETAG))
+           && (is_lisp_pointer(start_addr[1])
+               || ((start_addr[1] & FIXNUM_TAG_MASK) == 0) /* fixnum */
+               || (widetag_of(start_addr[1]) == CHARACTER_WIDETAG)
+#if N_WORD_BITS == 64
+               || (widetag_of(start_addr[1]) == SINGLE_FLOAT_WIDETAG)
+#endif
+               || (widetag_of(start_addr[1]) == UNBOUND_MARKER_WIDETAG))) {
+            break;
+        } else {
+            if (pointer_filter_verbose) {
+                fprintf(stderr,"*Wl2: %p %p %p\n",
+                        pointer, start_addr, (void *)*start_addr);
+            }
+            return 0;
+        }
+    case INSTANCE_POINTER_LOWTAG:
+        if ((long)pointer != ((long)start_addr+INSTANCE_POINTER_LOWTAG)) {
+            if (pointer_filter_verbose) {
+                fprintf(stderr,"*Wi1: %p %p %p\n",
+                        pointer, start_addr, (void *)*start_addr);
+            }
+            return 0;
+        }
+        if (widetag_of(start_addr[0]) != INSTANCE_HEADER_WIDETAG) {
+            if (pointer_filter_verbose) {
+                fprintf(stderr,"*Wi2: %p %p %p\n",
+                        pointer, start_addr, (void *)*start_addr);
+            }
+            return 0;
+        }
+        break;
+    case OTHER_POINTER_LOWTAG:
+        if ((long)pointer != ((long)start_addr+OTHER_POINTER_LOWTAG)) {
+            if (pointer_filter_verbose) {
+                fprintf(stderr,"*Wo1: %p %p %p\n",
+                        pointer, start_addr, (void *)*start_addr);
+            }
+            return 0;
+        }
+        /* Is it plausible? Not a cons. XXX should check the headers. */
+        if (is_lisp_pointer(start_addr[0]) || ((start_addr[0] & FIXNUM_TAG_MASK) == 0)) {
+            if (pointer_filter_verbose) {
+                fprintf(stderr,"*Wo2: %p %p %p\n",
+                        pointer, start_addr, (void *)*start_addr);
+            }
+            return 0;
+        }
+        switch (widetag_of(start_addr[0])) {
+        case UNBOUND_MARKER_WIDETAG:
+        case CHARACTER_WIDETAG:
+#if N_WORD_BITS == 64
+        case SINGLE_FLOAT_WIDETAG:
+#endif
+            if (pointer_filter_verbose) {
+                fprintf(stderr,"*Wo3: %p %p %p\n",
+                        pointer, start_addr, (void *)*start_addr);
+            }
+            return 0;
+
+            /* only pointed to by function pointers? */
+        case CLOSURE_HEADER_WIDETAG:
+        case FUNCALLABLE_INSTANCE_HEADER_WIDETAG:
+            if (pointer_filter_verbose) {
+                fprintf(stderr,"*Wo4: %p %p %p\n",
+                        pointer, start_addr, (void *)*start_addr);
+            }
+            return 0;
 
+        case INSTANCE_HEADER_WIDETAG:
+            if (pointer_filter_verbose) {
+                fprintf(stderr,"*Wo5: %p %p %p\n",
+                        pointer, start_addr, (void *)*start_addr);
+            }
+            return 0;
+
+            /* the valid other immediate pointer objects */
+        case SIMPLE_VECTOR_WIDETAG:
+        case RATIO_WIDETAG:
+        case COMPLEX_WIDETAG:
+#ifdef COMPLEX_SINGLE_FLOAT_WIDETAG
+        case COMPLEX_SINGLE_FLOAT_WIDETAG:
+#endif
+#ifdef COMPLEX_DOUBLE_FLOAT_WIDETAG
+        case COMPLEX_DOUBLE_FLOAT_WIDETAG:
+#endif
+#ifdef COMPLEX_LONG_FLOAT_WIDETAG
+        case COMPLEX_LONG_FLOAT_WIDETAG:
+#endif
+        case SIMPLE_ARRAY_WIDETAG:
+        case COMPLEX_BASE_STRING_WIDETAG:
+#ifdef COMPLEX_CHARACTER_STRING_WIDETAG
+        case COMPLEX_CHARACTER_STRING_WIDETAG:
+#endif
+        case COMPLEX_VECTOR_NIL_WIDETAG:
+        case COMPLEX_BIT_VECTOR_WIDETAG:
+        case COMPLEX_VECTOR_WIDETAG:
+        case COMPLEX_ARRAY_WIDETAG:
+        case VALUE_CELL_HEADER_WIDETAG:
+        case SYMBOL_HEADER_WIDETAG:
+        case FDEFN_WIDETAG:
+        case CODE_HEADER_WIDETAG:
+        case BIGNUM_WIDETAG:
+#if N_WORD_BITS != 64
+        case SINGLE_FLOAT_WIDETAG:
+#endif
+        case DOUBLE_FLOAT_WIDETAG:
+#ifdef LONG_FLOAT_WIDETAG
+        case LONG_FLOAT_WIDETAG:
+#endif
+        case SIMPLE_ARRAY_NIL_WIDETAG:
+        case SIMPLE_BASE_STRING_WIDETAG:
+#ifdef SIMPLE_CHARACTER_STRING_WIDETAG
+        case SIMPLE_CHARACTER_STRING_WIDETAG:
+#endif
+        case SIMPLE_BIT_VECTOR_WIDETAG:
+        case SIMPLE_ARRAY_UNSIGNED_BYTE_2_WIDETAG:
+        case SIMPLE_ARRAY_UNSIGNED_BYTE_4_WIDETAG:
+        case SIMPLE_ARRAY_UNSIGNED_BYTE_7_WIDETAG:
+        case SIMPLE_ARRAY_UNSIGNED_BYTE_8_WIDETAG:
+        case SIMPLE_ARRAY_UNSIGNED_BYTE_15_WIDETAG:
+        case SIMPLE_ARRAY_UNSIGNED_BYTE_16_WIDETAG:
+#ifdef SIMPLE_ARRAY_UNSIGNED_BYTE_29_WIDETAG
+        case SIMPLE_ARRAY_UNSIGNED_BYTE_29_WIDETAG:
+#endif
+        case SIMPLE_ARRAY_UNSIGNED_BYTE_31_WIDETAG:
+        case SIMPLE_ARRAY_UNSIGNED_BYTE_32_WIDETAG:
+#ifdef SIMPLE_ARRAY_UNSIGNED_BYTE_60_WIDETAG
+                case SIMPLE_ARRAY_UNSIGNED_BYTE_60_WIDETAG:
+#endif
+#ifdef SIMPLE_ARRAY_UNSIGNED_BYTE_63_WIDETAG
+                case SIMPLE_ARRAY_UNSIGNED_BYTE_63_WIDETAG:
+#endif
+#ifdef SIMPLE_ARRAY_UNSIGNED_BYTE_64_WIDETAG
+                case SIMPLE_ARRAY_UNSIGNED_BYTE_64_WIDETAG:
+#endif
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_8_WIDETAG
+        case SIMPLE_ARRAY_SIGNED_BYTE_8_WIDETAG:
+#endif
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_16_WIDETAG
+        case SIMPLE_ARRAY_SIGNED_BYTE_16_WIDETAG:
+#endif
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_30_WIDETAG
+        case SIMPLE_ARRAY_SIGNED_BYTE_30_WIDETAG:
+#endif
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_32_WIDETAG
+        case SIMPLE_ARRAY_SIGNED_BYTE_32_WIDETAG:
+#endif
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_61_WIDETAG
+                case SIMPLE_ARRAY_SIGNED_BYTE_61_WIDETAG:
+#endif
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_64_WIDETAG
+                case SIMPLE_ARRAY_SIGNED_BYTE_64_WIDETAG:
+#endif
+        case SIMPLE_ARRAY_SINGLE_FLOAT_WIDETAG:
+        case SIMPLE_ARRAY_DOUBLE_FLOAT_WIDETAG:
+#ifdef SIMPLE_ARRAY_LONG_FLOAT_WIDETAG
+        case SIMPLE_ARRAY_LONG_FLOAT_WIDETAG:
+#endif
+#ifdef SIMPLE_ARRAY_COMPLEX_SINGLE_FLOAT_WIDETAG
+        case SIMPLE_ARRAY_COMPLEX_SINGLE_FLOAT_WIDETAG:
+#endif
+#ifdef SIMPLE_ARRAY_COMPLEX_DOUBLE_FLOAT_WIDETAG
+        case SIMPLE_ARRAY_COMPLEX_DOUBLE_FLOAT_WIDETAG:
+#endif
+#ifdef SIMPLE_ARRAY_COMPLEX_LONG_FLOAT_WIDETAG
+        case SIMPLE_ARRAY_COMPLEX_LONG_FLOAT_WIDETAG:
+#endif
+        case SAP_WIDETAG:
+        case WEAK_POINTER_WIDETAG:
+#ifdef LUTEX_WIDETAG
+        case LUTEX_WIDETAG:
+#endif
+            break;
+
+        default:
+            if (pointer_filter_verbose) {
+                fprintf(stderr,"*Wo6: %p %p %p\n",
+                        pointer, start_addr, (void *)*start_addr);
+            }
+            return 0;
+        }
+        break;
     default:
-      if (pointer_filter_verbose) {
-       fprintf(stderr,"*Wo6: %x %x %x\n", pointer, start_addr, *start_addr);
-      }
-      return 0;
-    }
-    break;
-  default:
-    if (pointer_filter_verbose) {
-      fprintf(stderr,"*W?: %x %x %x\n", pointer, start_addr, *start_addr);
+        if (pointer_filter_verbose) {
+            fprintf(stderr,"*W?: %p %p %p\n",
+                    pointer, start_addr, (void *)*start_addr);
+        }
+        return 0;
     }
-    return 0;
-  }
 
-  /* looks good */
-  return 1;
+    /* looks good */
+    return 1;
 }
 
 #define MAX_STACK_POINTERS 256
 lispobj *valid_stack_locations[MAX_STACK_POINTERS];
-unsigned int num_valid_stack_locations;
+unsigned long num_valid_stack_locations;
 
 #define MAX_STACK_RETURN_ADDRESSES 128
 lispobj *valid_stack_ra_locations[MAX_STACK_RETURN_ADDRESSES];
 lispobj *valid_stack_ra_code_objects[MAX_STACK_RETURN_ADDRESSES];
-unsigned int num_valid_stack_ra_locations;
+unsigned long num_valid_stack_ra_locations;
 
 /* Identify valid stack slots. */
 static void
 setup_i386_stack_scav(lispobj *lowaddr, lispobj *base)
 {
-  lispobj *sp = lowaddr;
-  num_valid_stack_locations = 0;
-  num_valid_stack_ra_locations = 0;
-  for (sp = lowaddr; sp < base; sp++) {
-    lispobj thing = *sp;
-    /* Find the object start address */
-    lispobj *start_addr = search_dynamic_space((void *)thing);
-    if (start_addr) {
-      /* We need to allow raw pointers into Code objects for return
-       * addresses. This will also pick up pointers to functions in code
-       * objects. */
-      if (TypeOf(*start_addr) == type_CodeHeader) {
-       gc_assert(num_valid_stack_ra_locations < MAX_STACK_RETURN_ADDRESSES);
-       valid_stack_ra_locations[num_valid_stack_ra_locations] = sp;
-       valid_stack_ra_code_objects[num_valid_stack_ra_locations++] =
-         (lispobj *)((int)start_addr + type_OtherPointer);
-      } else {
-       if (valid_dynamic_space_pointer((void *)thing, start_addr)) {
-         gc_assert(num_valid_stack_locations < MAX_STACK_POINTERS);
-         valid_stack_locations[num_valid_stack_locations++] = sp;
-       }
-      }
+    lispobj *sp = lowaddr;
+    num_valid_stack_locations = 0;
+    num_valid_stack_ra_locations = 0;
+    for (sp = lowaddr; sp < base; sp++) {
+        lispobj thing = *sp;
+        /* Find the object start address */
+        lispobj *start_addr = search_dynamic_space((void *)thing);
+        if (start_addr) {
+            /* We need to allow raw pointers into Code objects for
+             * return addresses. This will also pick up pointers to
+             * functions in code objects. */
+            if (widetag_of(*start_addr) == CODE_HEADER_WIDETAG) {
+                /* FIXME asserting here is a really dumb thing to do.
+                 * If we've overflowed some arbitrary static limit, we
+                 * should just refuse to purify, instead of killing
+                 * the whole lisp session
+                 */
+                gc_assert(num_valid_stack_ra_locations <
+                          MAX_STACK_RETURN_ADDRESSES);
+                valid_stack_ra_locations[num_valid_stack_ra_locations] = sp;
+                valid_stack_ra_code_objects[num_valid_stack_ra_locations++] =
+                    (lispobj *)((long)start_addr + OTHER_POINTER_LOWTAG);
+            } else {
+                if (valid_dynamic_space_pointer((void *)thing, start_addr)) {
+                    gc_assert(num_valid_stack_locations < MAX_STACK_POINTERS);
+                    valid_stack_locations[num_valid_stack_locations++] = sp;
+                }
+            }
+        }
+    }
+    if (pointer_filter_verbose) {
+        fprintf(stderr, "number of valid stack pointers = %ld\n",
+                num_valid_stack_locations);
+        fprintf(stderr, "number of stack return addresses = %ld\n",
+                num_valid_stack_ra_locations);
     }
-  }
-  if (pointer_filter_verbose) {
-    fprintf(stderr, "number of valid stack pointers = %d\n",
-           num_valid_stack_locations);
-    fprintf(stderr, "number of stack return addresses = %d\n",
-           num_valid_stack_ra_locations);
-  }
 }
 
 static void
 pscav_i386_stack(void)
 {
-  int i;
-
-  for (i = 0; i < num_valid_stack_locations; i++)
-    pscav(valid_stack_locations[i], 1, 0);
-
-  for (i = 0; i < num_valid_stack_ra_locations; i++) {
-    lispobj code_obj = (lispobj)valid_stack_ra_code_objects[i];
-    pscav(&code_obj, 1, 0);
-    if (pointer_filter_verbose) {
-      fprintf(stderr,"*C moved RA %x to %x; for code object %x to %x\n",
-             *valid_stack_ra_locations[i],
-             (int)(*valid_stack_ra_locations[i])
-             - ((int)valid_stack_ra_code_objects[i] - (int)code_obj),
-             valid_stack_ra_code_objects[i], code_obj);
+    long i;
+
+    for (i = 0; i < num_valid_stack_locations; i++)
+        pscav(valid_stack_locations[i], 1, 0);
+
+    for (i = 0; i < num_valid_stack_ra_locations; i++) {
+        lispobj code_obj = (lispobj)valid_stack_ra_code_objects[i];
+        pscav(&code_obj, 1, 0);
+        if (pointer_filter_verbose) {
+            fprintf(stderr,"*C moved RA %p to %p; for code object %p to %p\n",
+                    (void *)*valid_stack_ra_locations[i],
+                    (void *)(*valid_stack_ra_locations[i]) -
+                    ((void *)valid_stack_ra_code_objects[i] -
+                     (void *)code_obj),
+                    valid_stack_ra_code_objects[i], (void *)code_obj);
+        }
+        *valid_stack_ra_locations[i] =
+            ((long)(*valid_stack_ra_locations[i])
+             - ((long)valid_stack_ra_code_objects[i] - (long)code_obj));
     }
-    *valid_stack_ra_locations[i] =
-      ((int)(*valid_stack_ra_locations[i])
-       - ((int)valid_stack_ra_code_objects[i] - (int)code_obj));
-  }
 }
 #endif
 #endif
 
 \f
 static void
-pscav_later(lispobj *where, int count)
+pscav_later(lispobj *where, long count)
 {
     struct later *new;
 
@@ -520,29 +493,23 @@ pscav_later(lispobj *where, int count)
     }
 }
 
-static lispobj ptrans_boxed(lispobj thing, lispobj header, boolean constant)
+static lispobj
+ptrans_boxed(lispobj thing, lispobj header, boolean constant)
 {
-    int nwords;
+    long nwords;
     lispobj result, *new, *old;
 
-    nwords = 1 + HeaderValue(header);
+    nwords = CEILING(1 + HeaderValue(header), 2);
 
     /* Allocate it */
-    old = (lispobj *)PTR(thing);
-    if (constant) {
-        new = read_only_free;
-        read_only_free += CEILING(nwords, 2);
-    }
-    else {
-        new = static_free;
-        static_free += CEILING(nwords, 2);
-    }
+    old = (lispobj *)native_pointer(thing);
+    new = newspace_alloc(nwords,constant);
 
     /* Copy it. */
     bcopy(old, new, nwords * sizeof(lispobj));
 
     /* Deposit forwarding pointer. */
-    result = (lispobj)new | LowtagOf(thing);
+    result = make_lispobj(new, lowtag_of(thing));
     *old = result;
 
     /* Scavenge it. */
@@ -552,125 +519,128 @@ static lispobj ptrans_boxed(lispobj thing, lispobj header, boolean constant)
 }
 
 /* We need to look at the layout to see whether it is a pure structure
- * class, and only then can we transport as constant. If it is pure, we can
- * ALWAYS transport as a constant. */
-static lispobj ptrans_instance(lispobj thing, lispobj header, boolean constant)
+ * class, and only then can we transport as constant. If it is pure,
+ * we can ALWAYS transport as a constant. */
+static lispobj
+ptrans_instance(lispobj thing, lispobj header, boolean /* ignored */ constant)
 {
-    lispobj layout = ((struct instance *)PTR(thing))->slots[0];
-    lispobj pure = ((struct instance *)PTR(layout))->slots[15];
+    struct layout *layout =
+      (struct layout *) native_pointer(((struct instance *)native_pointer(thing))->slots[0]);
+    lispobj pure = layout->pure;
 
     switch (pure) {
     case T:
-       return (ptrans_boxed(thing, header, 1));
+        return (ptrans_boxed(thing, header, 1));
     case NIL:
-       return (ptrans_boxed(thing, header, 0));
+        return (ptrans_boxed(thing, header, 0));
     case 0:
-       {
-           /* Substructure: special case for the compact-info-envs, where
-            * the instance may have a point to the dynamic space placed
-            * into it (e.g. the cache-name slot), but the lists and arrays
-            * at the time of a purify can be moved to the RO space. */
-           int nwords;
-           lispobj result, *new, *old;
+        {
+            /* Substructure: special case for the COMPACT-INFO-ENVs,
+             * where the instance may have a point to the dynamic
+             * space placed into it (e.g. the cache-name slot), but
+             * the lists and arrays at the time of a purify can be
+             * moved to the RO space. */
+            long nwords;
+            lispobj result, *new, *old;
 
-           nwords = 1 + HeaderValue(header);
+            nwords = CEILING(1 + HeaderValue(header), 2);
 
-           /* Allocate it */
-           old = (lispobj *)PTR(thing);
-           new = static_free;
-           static_free += CEILING(nwords, 2);
+            /* Allocate it */
+            old = (lispobj *)native_pointer(thing);
+            new = newspace_alloc(nwords, 0); /*  inconstant */
 
-           /* Copy it. */
-           bcopy(old, new, nwords * sizeof(lispobj));
+            /* Copy it. */
+            bcopy(old, new, nwords * sizeof(lispobj));
 
-           /* Deposit forwarding pointer. */
-           result = (lispobj)new | LowtagOf(thing);
-           *old = result;
+            /* Deposit forwarding pointer. */
+            result = make_lispobj(new, lowtag_of(thing));
+            *old = result;
 
-           /* Scavenge it. */
-           pscav(new, nwords, 1);
+            /* Scavenge it. */
+            pscav(new, nwords, 1);
 
-           return result;
-       }
+            return result;
+        }
     default:
-       gc_abort();
+        gc_abort();
+        return NIL; /* dummy value: return something ... */
     }
 }
 
-static lispobj ptrans_fdefn(lispobj thing, lispobj header)
+static lispobj
+ptrans_fdefn(lispobj thing, lispobj header)
 {
-    int nwords;
+    long nwords;
     lispobj result, *new, *old, oldfn;
     struct fdefn *fdefn;
 
-    nwords = 1 + HeaderValue(header);
+    nwords = CEILING(1 + HeaderValue(header), 2);
 
     /* Allocate it */
-    old = (lispobj *)PTR(thing);
-    new = static_free;
-    static_free += CEILING(nwords, 2);
+    old = (lispobj *)native_pointer(thing);
+    new = newspace_alloc(nwords, 0);    /* inconstant */
 
     /* Copy it. */
     bcopy(old, new, nwords * sizeof(lispobj));
 
     /* Deposit forwarding pointer. */
-    result = (lispobj)new | LowtagOf(thing);
+    result = make_lispobj(new, lowtag_of(thing));
     *old = result;
 
     /* Scavenge the function. */
     fdefn = (struct fdefn *)new;
-    oldfn = fdefn->function;
-    pscav(&fdefn->function, 1, 0);
-    if ((char *)oldfn + RAW_ADDR_OFFSET == fdefn->raw_addr)
-        fdefn->raw_addr = (char *)fdefn->function + RAW_ADDR_OFFSET;
+    oldfn = fdefn->fun;
+    pscav(&fdefn->fun, 1, 0);
+    if ((char *)oldfn + FUN_RAW_ADDR_OFFSET == fdefn->raw_addr)
+        fdefn->raw_addr = (char *)fdefn->fun + FUN_RAW_ADDR_OFFSET;
 
     return result;
 }
 
-static lispobj ptrans_unboxed(lispobj thing, lispobj header)
+static lispobj
+ptrans_unboxed(lispobj thing, lispobj header)
 {
-    int nwords;
+    long nwords;
     lispobj result, *new, *old;
 
-    nwords = 1 + HeaderValue(header);
+    nwords = CEILING(1 + HeaderValue(header), 2);
 
     /* Allocate it */
-    old = (lispobj *)PTR(thing);
-    new = read_only_free;
-    read_only_free += CEILING(nwords, 2);
+    old = (lispobj *)native_pointer(thing);
+    new = newspace_alloc(nwords,1);     /* always constant */
 
-    /* Copy it. */
+    /* copy it. */
     bcopy(old, new, nwords * sizeof(lispobj));
 
     /* Deposit forwarding pointer. */
-    result = (lispobj)new | LowtagOf(thing);
+    result = make_lispobj(new , lowtag_of(thing));
     *old = result;
 
     return result;
 }
 
-static lispobj ptrans_vector(lispobj thing, int bits, int extra,
-                            boolean boxed, boolean constant)
+static lispobj
+ptrans_vector(lispobj thing, long bits, long extra,
+              boolean boxed, boolean constant)
 {
     struct vector *vector;
-    int nwords;
+    long nwords;
     lispobj result, *new;
+    long length;
 
-    vector = (struct vector *)PTR(thing);
-    nwords = 2 + (CEILING((fixnum_value(vector->length)+extra)*bits,32)>>5);
-
-    if (boxed && !constant) {
-        new = static_free;
-        static_free += CEILING(nwords, 2);
-    }
-    else {
-        new = read_only_free;
-        read_only_free += CEILING(nwords, 2);
+    vector = (struct vector *)native_pointer(thing);
+    length = fixnum_value(vector->length)+extra;
+    // Argh, handle simple-vector-nil separately.
+    if (bits == 0) {
+      nwords = 2;
+    } else {
+      nwords = CEILING(NWORDS(length, bits) + 2, 2);
     }
 
+    new=newspace_alloc(nwords, (constant || !boxed));
     bcopy(vector, new, nwords * sizeof(lispobj));
 
-    result = (lispobj)new | LowtagOf(thing);
+    result = make_lispobj(new, lowtag_of(thing));
     vector->header = result;
 
     if (boxed)
@@ -679,111 +649,109 @@ static lispobj ptrans_vector(lispobj thing, int bits, int extra,
     return result;
 }
 
-#ifdef __i386__
+#if defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
 static void
 apply_code_fixups_during_purify(struct code *old_code, struct code *new_code)
 {
-  int nheader_words, ncode_words, nwords;
-  void  *constants_start_addr, *constants_end_addr;
-  void  *code_start_addr, *code_end_addr;
-  lispobj p;
-  lispobj fixups = NIL;
-  unsigned  displacement = (unsigned)new_code - (unsigned)old_code;
-  struct vector *fixups_vector;
-
-  /* Byte compiled code has no fixups. The trace table offset will be
-   * a fixnum if it's x86 compiled code - check. */
-  if (new_code->trace_table_offset & 0x3)
-    return;
-
-  /* Else it's x86 machine code. */
-  ncode_words = fixnum_value(new_code->code_size);
-  nheader_words = HeaderValue(*(lispobj *)new_code);
-  nwords = ncode_words + nheader_words;
-
-  constants_start_addr = (void *)new_code + 5*4;
-  constants_end_addr = (void *)new_code + nheader_words*4;
-  code_start_addr = (void *)new_code + nheader_words*4;
-  code_end_addr = (void *)new_code + nwords*4;
-
-  /* The first constant should be a pointer to the fixups for this
-   * code objects. Check. */
-  fixups = new_code->constants[0];
-
-  /* It will be 0 or the unbound-marker if there are no fixups, and
-   * will be an other-pointer to a vector if it is valid. */
-  if ((fixups==0) || (fixups==type_UnboundMarker) || !Pointerp(fixups)) {
-#ifdef GENCGC
-    /* Check for a possible errors. */
-    sniff_code_object(new_code,displacement);
-#endif
-    return;
-  }
-
-  fixups_vector = (struct vector *)PTR(fixups);
-
-  /* Could be pointing to a forwarding pointer. */
-  if (Pointerp(fixups) && (dynamic_pointer_p(fixups))
-      && forwarding_pointer_p(*(lispobj *)fixups_vector)) {
-    /* If so then follow it. */
-    fixups_vector = (struct vector *)PTR(*(lispobj *)fixups_vector);
-  }
-
-  if (TypeOf(fixups_vector->header) == type_SimpleArrayUnsignedByte32) {
-    /* We got the fixups for the code block. Now work through the vector,
-     * and apply a fixup at each address. */
-    int length = fixnum_value(fixups_vector->length);
-    int i;
-    for (i=0; i<length; i++) {
-      unsigned offset = fixups_vector->data[i];
-      /* Now check the current value of offset. */
-      unsigned  old_value = *(unsigned *)((unsigned)code_start_addr + offset);
-
-      /* If it's within the old_code object then it must be an
-       * absolute fixup (relative ones are not saved) */
-      if ((old_value>=(unsigned)old_code)
-         && (old_value<((unsigned)old_code + nwords*4)))
-       /* So add the dispacement. */
-       *(unsigned *)((unsigned)code_start_addr + offset) = old_value
-         + displacement;
-      else
-       /* It is outside the old code object so it must be a relative
-        * fixup (absolute fixups are not saved). So subtract the
-        * displacement. */
-       *(unsigned *)((unsigned)code_start_addr + offset) = old_value
-         - displacement;
+    long nheader_words, ncode_words, nwords;
+    void  *constants_start_addr, *constants_end_addr;
+    void  *code_start_addr, *code_end_addr;
+    lispobj fixups = NIL;
+    unsigned long displacement = (unsigned long)new_code - (unsigned long)old_code;
+    struct vector *fixups_vector;
+
+    ncode_words = fixnum_value(new_code->code_size);
+    nheader_words = HeaderValue(*(lispobj *)new_code);
+    nwords = ncode_words + nheader_words;
+
+    constants_start_addr = (void *)new_code + 5 * N_WORD_BYTES;
+    constants_end_addr = (void *)new_code + nheader_words*N_WORD_BYTES;
+    code_start_addr = (void *)new_code + nheader_words*N_WORD_BYTES;
+    code_end_addr = (void *)new_code + nwords*N_WORD_BYTES;
+
+    /* The first constant should be a pointer to the fixups for this
+     * code objects. Check. */
+    fixups = new_code->constants[0];
+
+    /* It will be 0 or the unbound-marker if there are no fixups, and
+     * will be an other-pointer to a vector if it is valid. */
+    if ((fixups==0) ||
+        (fixups==UNBOUND_MARKER_WIDETAG) ||
+        !is_lisp_pointer(fixups)) {
+#ifdef LISP_FEATURE_GENCGC
+        /* Check for a possible errors. */
+        sniff_code_object(new_code,displacement);
+#endif
+        return;
+    }
+
+    fixups_vector = (struct vector *)native_pointer(fixups);
+
+    /* Could be pointing to a forwarding pointer. */
+    if (is_lisp_pointer(fixups) && (dynamic_pointer_p(fixups))
+        && forwarding_pointer_p(*(lispobj *)fixups_vector)) {
+        /* If so then follow it. */
+        fixups_vector =
+            (struct vector *)native_pointer(*(lispobj *)fixups_vector);
     }
-  }
 
-  /* No longer need the fixups. */
-  new_code->constants[0] = 0;
+    if (widetag_of(fixups_vector->header) == SIMPLE_ARRAY_WORD_WIDETAG) {
+        /* We got the fixups for the code block. Now work through the
+         * vector, and apply a fixup at each address. */
+        long length = fixnum_value(fixups_vector->length);
+        long i;
+        for (i=0; i<length; i++) {
+            unsigned offset = fixups_vector->data[i];
+            /* Now check the current value of offset. */
+            unsigned long old_value =
+                *(unsigned long *)((unsigned long)code_start_addr + offset);
+
+            /* If it's within the old_code object then it must be an
+             * absolute fixup (relative ones are not saved) */
+            if ((old_value>=(unsigned long)old_code)
+                && (old_value<((unsigned long)old_code + nwords * N_WORD_BYTES)))
+                /* So add the dispacement. */
+                *(unsigned long *)((unsigned long)code_start_addr + offset) = old_value
+                    + displacement;
+            else
+                /* It is outside the old code object so it must be a relative
+                 * fixup (absolute fixups are not saved). So subtract the
+                 * displacement. */
+                *(unsigned long *)((unsigned long)code_start_addr + offset) = old_value
+                    - displacement;
+        }
+    }
+
+    /* No longer need the fixups. */
+    new_code->constants[0] = 0;
 
-#ifdef GENCGC
-  /* Check for possible errors. */
-  sniff_code_object(new_code,displacement);
+#ifdef LISP_FEATURE_GENCGC
+    /* Check for possible errors. */
+    sniff_code_object(new_code,displacement);
 #endif
 }
 #endif
 
-static lispobj ptrans_code(lispobj thing)
+static lispobj
+ptrans_code(lispobj thing)
 {
     struct code *code, *new;
-    int nwords;
+    long nwords;
     lispobj func, result;
 
-    code = (struct code *)PTR(thing);
-    nwords = HeaderValue(code->header) + fixnum_value(code->code_size);
+    code = (struct code *)native_pointer(thing);
+    nwords = CEILING(HeaderValue(code->header) + fixnum_value(code->code_size),
+                     2);
 
-    new = (struct code *)read_only_free;
-    read_only_free += CEILING(nwords, 2);
+    new = (struct code *)newspace_alloc(nwords,1); /* constant */
 
     bcopy(code, new, nwords * sizeof(lispobj));
 
-#ifdef __i386__
+#if defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
     apply_code_fixups_during_purify(code,new);
 #endif
 
-    result = (lispobj)new | type_OtherPointer;
+    result = make_lispobj(new, OTHER_POINTER_LOWTAG);
 
     /* Stick in a forwarding pointer for the code object. */
     *(lispobj *)code = result;
@@ -791,21 +759,26 @@ static lispobj ptrans_code(lispobj thing)
     /* Put in forwarding pointers for all the functions. */
     for (func = code->entry_points;
          func != NIL;
-         func = ((struct function *)PTR(func))->next) {
+         func = ((struct simple_fun *)native_pointer(func))->next) {
 
-        gc_assert(LowtagOf(func) == type_FunctionPointer);
+        gc_assert(lowtag_of(func) == FUN_POINTER_LOWTAG);
 
-        *(lispobj *)PTR(func) = result + (func - thing);
+        *(lispobj *)native_pointer(func) = result + (func - thing);
     }
 
     /* Arrange to scavenge the debug info later. */
     pscav_later(&new->debug_info, 1);
 
-    if(new->trace_table_offset & 0x3)
+    /* FIXME: why would this be a fixnum? */
+    /* "why" is a hard word, but apparently for compiled functions the
+       trace_table_offset contains the length of the instructions, as
+       a fixnum.  See CODE-INST-AREA-LENGTH in
+       src/compiler/target-disassem.lisp.  -- CSR, 2004-01-08 */
+    if (!(fixnump(new->trace_table_offset)))
 #if 0
-      pscav(&new->trace_table_offset, 1, 0);
+        pscav(&new->trace_table_offset, 1, 0);
 #else
-      new->trace_table_offset = NIL; /* limit lifetime */
+        new->trace_table_offset = NIL; /* limit lifetime */
 #endif
 
     /* Scavenge the constants. */
@@ -815,30 +788,32 @@ static lispobj ptrans_code(lispobj thing)
     pscav(&new->entry_points, 1, 1);
     for (func = new->entry_points;
          func != NIL;
-         func = ((struct function *)PTR(func))->next) {
-        gc_assert(LowtagOf(func) == type_FunctionPointer);
+         func = ((struct simple_fun *)native_pointer(func))->next) {
+        gc_assert(lowtag_of(func) == FUN_POINTER_LOWTAG);
         gc_assert(!dynamic_pointer_p(func));
 
-#ifdef __i386__
-       /* Temporarly convert the self pointer to a real function
-           pointer. */
-       ((struct function *)PTR(func))->self -= RAW_ADDR_OFFSET;
+#if defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
+        /* Temporarily convert the self pointer to a real function pointer. */
+        ((struct simple_fun *)native_pointer(func))->self
+            -= FUN_RAW_ADDR_OFFSET;
 #endif
-        pscav(&((struct function *)PTR(func))->self, 2, 1);
-#ifdef __i386__
-       ((struct function *)PTR(func))->self += RAW_ADDR_OFFSET;
+        pscav(&((struct simple_fun *)native_pointer(func))->self, 2, 1);
+#if defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
+        ((struct simple_fun *)native_pointer(func))->self
+            += FUN_RAW_ADDR_OFFSET;
 #endif
-        pscav_later(&((struct function *)PTR(func))->name, 3);
+        pscav_later(&((struct simple_fun *)native_pointer(func))->name, 4);
     }
 
     return result;
 }
 
-static lispobj ptrans_func(lispobj thing, lispobj header)
+static lispobj
+ptrans_func(lispobj thing, lispobj header)
 {
-    int nwords;
+    long nwords;
     lispobj code, *new, *old, result;
-    struct function *function;
+    struct simple_fun *function;
 
     /* Thing can either be a function header, a closure function
      * header, a closure, or a funcallable-instance. If it's a closure
@@ -846,47 +821,42 @@ static lispobj ptrans_func(lispobj thing, lispobj header)
      * Otherwise we have to do something strange, 'cause it is buried
      * inside a code object. */
 
-    if (TypeOf(header) == type_FunctionHeader ||
-        TypeOf(header) == type_ClosureFunctionHeader) {
+    if (widetag_of(header) == SIMPLE_FUN_HEADER_WIDETAG) {
 
-       /* We can only end up here if the code object has not been
+        /* We can only end up here if the code object has not been
          * scavenged, because if it had been scavenged, forwarding pointers
          * would have been left behind for all the entry points. */
 
-        function = (struct function *)PTR(thing);
-        code = (PTR(thing)-(HeaderValue(function->header)*sizeof(lispobj))) |
-            type_OtherPointer;
+        function = (struct simple_fun *)native_pointer(thing);
+        code =
+            make_lispobj
+            ((native_pointer(thing) -
+              (HeaderValue(function->header))), OTHER_POINTER_LOWTAG);
 
-        /* This will cause the function's header to be replaced with a 
+        /* This will cause the function's header to be replaced with a
          * forwarding pointer. */
+
         ptrans_code(code);
 
         /* So we can just return that. */
         return function->header;
     }
     else {
-       /* It's some kind of closure-like thing. */
-        nwords = 1 + HeaderValue(header);
-        old = (lispobj *)PTR(thing);
-
-       /* Allocate the new one. */
-       if (TypeOf(header) == type_FuncallableInstanceHeader) {
-           /* FINs *must* not go in read_only space. */
-           new = static_free;
-           static_free += CEILING(nwords, 2);
-       }
-       else {
-           /* Closures can always go in read-only space, 'cause they
-            * never change. */
-
-           new = read_only_free;
-           read_only_free += CEILING(nwords, 2);
-       }
+        /* It's some kind of closure-like thing. */
+        nwords = CEILING(1 + HeaderValue(header), 2);
+        old = (lispobj *)native_pointer(thing);
+
+        /* Allocate the new one.  FINs *must* not go in read_only
+         * space.  Closures can; they never change */
+
+        new = newspace_alloc
+            (nwords,(widetag_of(header)!=FUNCALLABLE_INSTANCE_HEADER_WIDETAG));
+
         /* Copy it. */
         bcopy(old, new, nwords * sizeof(lispobj));
 
         /* Deposit forwarding pointer. */
-        result = (lispobj)new | LowtagOf(thing);
+        result = make_lispobj(new, lowtag_of(thing));
         *old = result;
 
         /* Scavenge it. */
@@ -896,7 +866,8 @@ static lispobj ptrans_func(lispobj thing, lispobj header)
     }
 }
 
-static lispobj ptrans_returnpc(lispobj thing, lispobj header)
+static lispobj
+ptrans_returnpc(lispobj thing, lispobj header)
 {
     lispobj code, new;
 
@@ -904,7 +875,7 @@ static lispobj ptrans_returnpc(lispobj thing, lispobj header)
     code = thing - HeaderValue(header)*sizeof(lispobj);
 
     /* Make sure it's been transported. */
-    new = *(lispobj *)PTR(code);
+    new = *(lispobj *)native_pointer(code);
     if (!forwarding_pointer_p(new))
         new = ptrans_code(code);
 
@@ -914,205 +885,229 @@ static lispobj ptrans_returnpc(lispobj thing, lispobj header)
 
 #define WORDS_PER_CONS CEILING(sizeof(struct cons) / sizeof(lispobj), 2)
 
-static lispobj ptrans_list(lispobj thing, boolean constant)
+static lispobj
+ptrans_list(lispobj thing, boolean constant)
 {
     struct cons *old, *new, *orig;
-    int length;
+    long length;
 
-    if (constant)
-        orig = (struct cons *)read_only_free;
-    else
-        orig = (struct cons *)static_free;
+    orig = (struct cons *) newspace_alloc(0,constant);
     length = 0;
 
     do {
         /* Allocate a new cons cell. */
-        old = (struct cons *)PTR(thing);
-        if (constant) {
-            new = (struct cons *)read_only_free;
-            read_only_free += WORDS_PER_CONS;
-        }
-        else {
-            new = (struct cons *)static_free;
-            static_free += WORDS_PER_CONS;
-        }
+        old = (struct cons *)native_pointer(thing);
+        new = (struct cons *) newspace_alloc(WORDS_PER_CONS,constant);
 
         /* Copy the cons cell and keep a pointer to the cdr. */
         new->car = old->car;
         thing = new->cdr = old->cdr;
 
         /* Set up the forwarding pointer. */
-        *(lispobj *)old = ((lispobj)new) | type_ListPointer;
+        *(lispobj *)old = make_lispobj(new, LIST_POINTER_LOWTAG);
 
         /* And count this cell. */
         length++;
-    } while (LowtagOf(thing) == type_ListPointer &&
+    } while (lowtag_of(thing) == LIST_POINTER_LOWTAG &&
              dynamic_pointer_p(thing) &&
-             !(forwarding_pointer_p(*(lispobj *)PTR(thing))));
+             !(forwarding_pointer_p(*(lispobj *)native_pointer(thing))));
 
     /* Scavenge the list we just copied. */
     pscav((lispobj *)orig, length * WORDS_PER_CONS, constant);
 
-    return ((lispobj)orig) | type_ListPointer;
+    return make_lispobj(orig, LIST_POINTER_LOWTAG);
 }
 
-static lispobj ptrans_otherptr(lispobj thing, lispobj header, boolean constant)
+static lispobj
+ptrans_otherptr(lispobj thing, lispobj header, boolean constant)
 {
-    switch (TypeOf(header)) {
-      case type_Bignum:
-      case type_SingleFloat:
-      case type_DoubleFloat:
-#ifdef type_LongFloat
-      case type_LongFloat:
-#endif
-#ifdef type_ComplexSingleFloat
-      case type_ComplexSingleFloat:
-#endif
-#ifdef type_ComplexDoubleFloat
-      case type_ComplexDoubleFloat:
-#endif
-#ifdef type_ComplexLongFloat
-      case type_ComplexLongFloat:
-#endif
-      case type_Sap:
-        return ptrans_unboxed(thing, header);
-
-      case type_Ratio:
-      case type_Complex:
-      case type_SimpleArray:
-      case type_ComplexString:
-      case type_ComplexVector:
-      case type_ComplexArray:
+    switch (widetag_of(header)) {
+        /* FIXME: this needs a reindent */
+      case BIGNUM_WIDETAG:
+      case SINGLE_FLOAT_WIDETAG:
+      case DOUBLE_FLOAT_WIDETAG:
+#ifdef LONG_FLOAT_WIDETAG
+      case LONG_FLOAT_WIDETAG:
+#endif
+#ifdef COMPLEX_SINGLE_FLOAT_WIDETAG
+      case COMPLEX_SINGLE_FLOAT_WIDETAG:
+#endif
+#ifdef COMPLEX_DOUBLE_FLOAT_WIDETAG
+      case COMPLEX_DOUBLE_FLOAT_WIDETAG:
+#endif
+#ifdef COMPLEX_LONG_FLOAT_WIDETAG
+      case COMPLEX_LONG_FLOAT_WIDETAG:
+#endif
+      case SAP_WIDETAG:
+          return ptrans_unboxed(thing, header);
+#ifdef LUTEX_WIDETAG
+      case LUTEX_WIDETAG:
+          gencgc_unregister_lutex(native_pointer(thing));
+          return ptrans_unboxed(thing, header);
+#endif
+
+      case RATIO_WIDETAG:
+      case COMPLEX_WIDETAG:
+      case SIMPLE_ARRAY_WIDETAG:
+      case COMPLEX_BASE_STRING_WIDETAG:
+#ifdef COMPLEX_CHARACTER_STRING_WIDETAG
+    case COMPLEX_CHARACTER_STRING_WIDETAG:
+#endif
+      case COMPLEX_BIT_VECTOR_WIDETAG:
+      case COMPLEX_VECTOR_NIL_WIDETAG:
+      case COMPLEX_VECTOR_WIDETAG:
+      case COMPLEX_ARRAY_WIDETAG:
         return ptrans_boxed(thing, header, constant);
-       
-      case type_ValueCellHeader:
-      case type_WeakPointer:
+
+      case VALUE_CELL_HEADER_WIDETAG:
+      case WEAK_POINTER_WIDETAG:
         return ptrans_boxed(thing, header, 0);
 
-      case type_SymbolHeader:
+      case SYMBOL_HEADER_WIDETAG:
         return ptrans_boxed(thing, header, 0);
 
-      case type_SimpleString:
+      case SIMPLE_ARRAY_NIL_WIDETAG:
+        return ptrans_vector(thing, 0, 0, 0, constant);
+
+      case SIMPLE_BASE_STRING_WIDETAG:
         return ptrans_vector(thing, 8, 1, 0, constant);
 
-      case type_SimpleBitVector:
+#ifdef SIMPLE_CHARACTER_STRING_WIDETAG
+    case SIMPLE_CHARACTER_STRING_WIDETAG:
+        return ptrans_vector(thing, 32, 1, 0, constant);
+#endif
+
+      case SIMPLE_BIT_VECTOR_WIDETAG:
         return ptrans_vector(thing, 1, 0, 0, constant);
 
-      case type_SimpleVector:
-        return ptrans_vector(thing, 32, 0, 1, constant);
+      case SIMPLE_VECTOR_WIDETAG:
+        return ptrans_vector(thing, N_WORD_BITS, 0, 1, constant);
 
-      case type_SimpleArrayUnsignedByte2:
+      case SIMPLE_ARRAY_UNSIGNED_BYTE_2_WIDETAG:
         return ptrans_vector(thing, 2, 0, 0, constant);
 
-      case type_SimpleArrayUnsignedByte4:
+      case SIMPLE_ARRAY_UNSIGNED_BYTE_4_WIDETAG:
         return ptrans_vector(thing, 4, 0, 0, constant);
 
-      case type_SimpleArrayUnsignedByte8:
-#ifdef type_SimpleArraySignedByte8
-      case type_SimpleArraySignedByte8:
+      case SIMPLE_ARRAY_UNSIGNED_BYTE_8_WIDETAG:
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_8_WIDETAG
+      case SIMPLE_ARRAY_SIGNED_BYTE_8_WIDETAG:
+      case SIMPLE_ARRAY_UNSIGNED_BYTE_7_WIDETAG:
 #endif
         return ptrans_vector(thing, 8, 0, 0, constant);
 
-      case type_SimpleArrayUnsignedByte16:
-#ifdef type_SimpleArraySignedByte16
-      case type_SimpleArraySignedByte16:
+      case SIMPLE_ARRAY_UNSIGNED_BYTE_16_WIDETAG:
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_16_WIDETAG
+      case SIMPLE_ARRAY_SIGNED_BYTE_16_WIDETAG:
+      case SIMPLE_ARRAY_UNSIGNED_BYTE_15_WIDETAG:
 #endif
         return ptrans_vector(thing, 16, 0, 0, constant);
 
-      case type_SimpleArrayUnsignedByte32:
-#ifdef type_SimpleArraySignedByte30
-      case type_SimpleArraySignedByte30:
+      case SIMPLE_ARRAY_UNSIGNED_BYTE_32_WIDETAG:
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_30_WIDETAG
+      case SIMPLE_ARRAY_SIGNED_BYTE_30_WIDETAG:
+      case SIMPLE_ARRAY_UNSIGNED_BYTE_29_WIDETAG:
 #endif
-#ifdef type_SimpleArraySignedByte32
-      case type_SimpleArraySignedByte32:
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_32_WIDETAG
+      case SIMPLE_ARRAY_SIGNED_BYTE_32_WIDETAG:
+      case SIMPLE_ARRAY_UNSIGNED_BYTE_31_WIDETAG:
 #endif
         return ptrans_vector(thing, 32, 0, 0, constant);
 
-      case type_SimpleArraySingleFloat:
+#if N_WORD_BITS == 64
+#ifdef SIMPLE_ARRAY_UNSIGNED_BYTE_60_WIDETAG
+      case SIMPLE_ARRAY_UNSIGNED_BYTE_60_WIDETAG:
+#endif
+#ifdef SIMPLE_ARRAY_UNSIGNED_BYTE_63_WIDETAG
+      case SIMPLE_ARRAY_UNSIGNED_BYTE_63_WIDETAG:
+#endif
+#ifdef SIMPLE_ARRAY_UNSIGNED_BYTE_64_WIDETAG
+      case SIMPLE_ARRAY_UNSIGNED_BYTE_64_WIDETAG:
+#endif
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_61_WIDETAG
+      case SIMPLE_ARRAY_SIGNED_BYTE_61_WIDETAG:
+#endif
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_64_WIDETAG
+      case SIMPLE_ARRAY_SIGNED_BYTE_64_WIDETAG:
+#endif
+        return ptrans_vector(thing, 64, 0, 0, constant);
+#endif
+
+      case SIMPLE_ARRAY_SINGLE_FLOAT_WIDETAG:
         return ptrans_vector(thing, 32, 0, 0, constant);
 
-      case type_SimpleArrayDoubleFloat:
+      case SIMPLE_ARRAY_DOUBLE_FLOAT_WIDETAG:
         return ptrans_vector(thing, 64, 0, 0, constant);
 
-#ifdef type_SimpleArrayLongFloat
-      case type_SimpleArrayLongFloat:
-#ifdef __i386__
+#ifdef SIMPLE_ARRAY_LONG_FLOAT_WIDETAG
+      case SIMPLE_ARRAY_LONG_FLOAT_WIDETAG:
+#ifdef LISP_FEATURE_X86
         return ptrans_vector(thing, 96, 0, 0, constant);
 #endif
-#ifdef sparc
+#ifdef LISP_FEATURE_SPARC
         return ptrans_vector(thing, 128, 0, 0, constant);
 #endif
 #endif
 
-#ifdef type_SimpleArrayComplexSingleFloat
-      case type_SimpleArrayComplexSingleFloat:
+#ifdef SIMPLE_ARRAY_COMPLEX_SINGLE_FLOAT_WIDETAG
+      case SIMPLE_ARRAY_COMPLEX_SINGLE_FLOAT_WIDETAG:
         return ptrans_vector(thing, 64, 0, 0, constant);
 #endif
 
-#ifdef type_SimpleArrayComplexDoubleFloat
-      case type_SimpleArrayComplexDoubleFloat:
+#ifdef SIMPLE_ARRAY_COMPLEX_DOUBLE_FLOAT_WIDETAG
+      case SIMPLE_ARRAY_COMPLEX_DOUBLE_FLOAT_WIDETAG:
         return ptrans_vector(thing, 128, 0, 0, constant);
 #endif
 
-#ifdef type_SimpleArrayComplexLongFloat
-      case type_SimpleArrayComplexLongFloat:
-#ifdef __i386__
+#ifdef SIMPLE_ARRAY_COMPLEX_LONG_FLOAT_WIDETAG
+      case SIMPLE_ARRAY_COMPLEX_LONG_FLOAT_WIDETAG:
+#ifdef LISP_FEATURE_X86
         return ptrans_vector(thing, 192, 0, 0, constant);
 #endif
-#ifdef sparc
+#ifdef LISP_FEATURE_SPARC
         return ptrans_vector(thing, 256, 0, 0, constant);
 #endif
 #endif
 
-      case type_CodeHeader:
+      case CODE_HEADER_WIDETAG:
         return ptrans_code(thing);
 
-      case type_ReturnPcHeader:
+      case RETURN_PC_HEADER_WIDETAG:
         return ptrans_returnpc(thing, header);
 
-      case type_Fdefn:
-       return ptrans_fdefn(thing, header);
+      case FDEFN_WIDETAG:
+        return ptrans_fdefn(thing, header);
 
       default:
+        fprintf(stderr, "Invalid widetag: %d\n", widetag_of(header));
         /* Should only come across other pointers to the above stuff. */
         gc_abort();
-       return NIL;
+        return NIL;
     }
 }
 
-static int pscav_fdefn(struct fdefn *fdefn)
+static long
+pscav_fdefn(struct fdefn *fdefn)
 {
     boolean fix_func;
 
-    fix_func = ((char *)(fdefn->function+RAW_ADDR_OFFSET) == fdefn->raw_addr);
+    fix_func = ((char *)(fdefn->fun+FUN_RAW_ADDR_OFFSET) == fdefn->raw_addr);
     pscav(&fdefn->name, 1, 1);
-    pscav(&fdefn->function, 1, 0);
+    pscav(&fdefn->fun, 1, 0);
     if (fix_func)
-        fdefn->raw_addr = (char *)(fdefn->function + RAW_ADDR_OFFSET);
+        fdefn->raw_addr = (char *)(fdefn->fun + FUN_RAW_ADDR_OFFSET);
     return sizeof(struct fdefn) / sizeof(lispobj);
 }
 
-#ifdef __i386__
+#if defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
 /* now putting code objects in static space */
-static int
+static long
 pscav_code(struct code*code)
 {
-    int nwords;
+    long nwords;
     lispobj func;
-    nwords = HeaderValue(code->header) + fixnum_value(code->code_size);
-
-    /* pw--The trace_table_offset slot can contain a list pointer. This
-     * occurs when the code object is a top level form that initializes
-     * a byte-compiled function. The fact that PURIFY was ignoring this
-     * slot may be a bug unrelated to the x86 port, except that TLF's
-     * normally become unreachable after the loader calls them and
-     * won't be seen by PURIFY at all!! */
-    if(code->trace_table_offset & 0x3)
-#if 0
-      pscav(&code->trace_table_offset, 1, 0);
-#else
-      code->trace_table_offset = NIL; /* limit lifetime */
-#endif
+    nwords = CEILING(HeaderValue(code->header) + fixnum_value(code->code_size),
+                     2);
 
     /* Arrange to scavenge the debug info later. */
     pscav_later(&code->debug_info, 1);
@@ -1124,59 +1119,62 @@ pscav_code(struct code*code)
     pscav(&code->entry_points, 1, 1);
     for (func = code->entry_points;
          func != NIL;
-         func = ((struct function *)PTR(func))->next) {
-        gc_assert(LowtagOf(func) == type_FunctionPointer);
+         func = ((struct simple_fun *)native_pointer(func))->next) {
+        gc_assert(lowtag_of(func) == FUN_POINTER_LOWTAG);
         gc_assert(!dynamic_pointer_p(func));
 
-#ifdef __i386__
-       /* Temporarly convert the self pointer to a real function
-        * pointer. */
-       ((struct function *)PTR(func))->self -= RAW_ADDR_OFFSET;
+#if defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
+        /* Temporarily convert the self pointer to a real function
+         * pointer. */
+        ((struct simple_fun *)native_pointer(func))->self
+            -= FUN_RAW_ADDR_OFFSET;
 #endif
-        pscav(&((struct function *)PTR(func))->self, 2, 1);
-#ifdef __i386__
-       ((struct function *)PTR(func))->self += RAW_ADDR_OFFSET;
+        pscav(&((struct simple_fun *)native_pointer(func))->self, 2, 1);
+#if defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
+        ((struct simple_fun *)native_pointer(func))->self
+            += FUN_RAW_ADDR_OFFSET;
 #endif
-        pscav_later(&((struct function *)PTR(func))->name, 3);
+        pscav_later(&((struct simple_fun *)native_pointer(func))->name, 4);
     }
 
     return CEILING(nwords,2);
 }
 #endif
 
-static lispobj *pscav(lispobj *addr, int nwords, boolean constant)
+static lispobj *
+pscav(lispobj *addr, long nwords, boolean constant)
 {
     lispobj thing, *thingp, header;
-    int count;
+    long count = 0; /* (0 = dummy init value to stop GCC warning) */
     struct vector *vector;
 
     while (nwords > 0) {
         thing = *addr;
-        if (Pointerp(thing)) {
+        if (is_lisp_pointer(thing)) {
             /* It's a pointer. Is it something we might have to move? */
             if (dynamic_pointer_p(thing)) {
                 /* Maybe. Have we already moved it? */
-               thingp = (lispobj *)PTR(thing);
+                thingp = (lispobj *)native_pointer(thing);
                 header = *thingp;
-                if (Pointerp(header) && forwarding_pointer_p(header))
+                if (is_lisp_pointer(header) && forwarding_pointer_p(header))
                     /* Yep, so just copy the forwarding pointer. */
                     thing = header;
                 else {
                     /* Nope, copy the object. */
-                    switch (LowtagOf(thing)) {
-                      case type_FunctionPointer:
+                    switch (lowtag_of(thing)) {
+                      case FUN_POINTER_LOWTAG:
                         thing = ptrans_func(thing, header);
                         break;
 
-                      case type_ListPointer:
+                      case LIST_POINTER_LOWTAG:
                         thing = ptrans_list(thing, constant);
                         break;
 
-                      case type_InstancePointer:
+                      case INSTANCE_POINTER_LOWTAG:
                         thing = ptrans_instance(thing, header, constant);
                         break;
 
-                      case type_OtherPointer:
+                      case OTHER_POINTER_LOWTAG:
                         thing = ptrans_otherptr(thing, header, constant);
                         break;
 
@@ -1189,164 +1187,211 @@ static lispobj *pscav(lispobj *addr, int nwords, boolean constant)
             }
             count = 1;
         }
-        else if (thing & 3) {
+#if N_WORD_BITS == 64
+        else if (widetag_of(thing) == SINGLE_FLOAT_WIDETAG) {
+            count = 1;
+        }
+#endif
+        else if (thing & FIXNUM_TAG_MASK) {
             /* It's an other immediate. Maybe the header for an unboxed */
             /* object. */
-            switch (TypeOf(thing)) {
-              case type_Bignum:
-              case type_SingleFloat:
-              case type_DoubleFloat:
-#ifdef type_LongFloat
-              case type_LongFloat:
-#endif
-              case type_Sap:
+            switch (widetag_of(thing)) {
+              case BIGNUM_WIDETAG:
+              case SINGLE_FLOAT_WIDETAG:
+              case DOUBLE_FLOAT_WIDETAG:
+#ifdef LONG_FLOAT_WIDETAG
+              case LONG_FLOAT_WIDETAG:
+#endif
+              case SAP_WIDETAG:
                 /* It's an unboxed simple object. */
-                count = HeaderValue(thing)+1;
+                count = CEILING(HeaderValue(thing)+1, 2);
                 break;
 
-              case type_SimpleVector:
-                if (HeaderValue(thing) == subtype_VectorValidHashing)
-                    *addr = (subtype_VectorMustRehash<<type_Bits) |
-                        type_SimpleVector;
-                count = 1;
+              case SIMPLE_VECTOR_WIDETAG:
+                  if (HeaderValue(thing) == subtype_VectorValidHashing) {
+                    *addr = (subtype_VectorMustRehash << N_WIDETAG_BITS) |
+                        SIMPLE_VECTOR_WIDETAG;
+                  }
+                count = 2;
+                break;
+
+              case SIMPLE_ARRAY_NIL_WIDETAG:
+                count = 2;
                 break;
 
-              case type_SimpleString:
+              case SIMPLE_BASE_STRING_WIDETAG:
                 vector = (struct vector *)addr;
-                count = CEILING(NWORDS(fixnum_value(vector->length)+1,4)+2,2);
+                count = CEILING(NWORDS(fixnum_value(vector->length)+1,8)+2,2);
                 break;
 
-              case type_SimpleBitVector:
+#ifdef SIMPLE_CHARACTER_STRING_WIDETAG
+            case SIMPLE_CHARACTER_STRING_WIDETAG:
                 vector = (struct vector *)addr;
-                count = CEILING(NWORDS(fixnum_value(vector->length),32)+2,2);
+                count = CEILING(NWORDS(fixnum_value(vector->length)+1,32)+2,2);
                 break;
+#endif
 
-              case type_SimpleArrayUnsignedByte2:
+              case SIMPLE_BIT_VECTOR_WIDETAG:
                 vector = (struct vector *)addr;
-                count = CEILING(NWORDS(fixnum_value(vector->length),16)+2,2);
+                count = CEILING(NWORDS(fixnum_value(vector->length),1)+2,2);
+                break;
+
+              case SIMPLE_ARRAY_UNSIGNED_BYTE_2_WIDETAG:
+                vector = (struct vector *)addr;
+                count = CEILING(NWORDS(fixnum_value(vector->length),2)+2,2);
                 break;
 
-              case type_SimpleArrayUnsignedByte4:
+              case SIMPLE_ARRAY_UNSIGNED_BYTE_4_WIDETAG:
+                vector = (struct vector *)addr;
+                count = CEILING(NWORDS(fixnum_value(vector->length),4)+2,2);
+                break;
+
+              case SIMPLE_ARRAY_UNSIGNED_BYTE_8_WIDETAG:
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_8_WIDETAG
+              case SIMPLE_ARRAY_SIGNED_BYTE_8_WIDETAG:
+              case SIMPLE_ARRAY_UNSIGNED_BYTE_7_WIDETAG:
+#endif
                 vector = (struct vector *)addr;
                 count = CEILING(NWORDS(fixnum_value(vector->length),8)+2,2);
                 break;
 
-              case type_SimpleArrayUnsignedByte8:
-#ifdef type_SimpleArraySignedByte8
-              case type_SimpleArraySignedByte8:
+              case SIMPLE_ARRAY_UNSIGNED_BYTE_16_WIDETAG:
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_16_WIDETAG
+              case SIMPLE_ARRAY_SIGNED_BYTE_16_WIDETAG:
+              case SIMPLE_ARRAY_UNSIGNED_BYTE_15_WIDETAG:
 #endif
                 vector = (struct vector *)addr;
-                count = CEILING(NWORDS(fixnum_value(vector->length),4)+2,2);
+                count = CEILING(NWORDS(fixnum_value(vector->length),16)+2,2);
                 break;
 
-              case type_SimpleArrayUnsignedByte16:
-#ifdef type_SimpleArraySignedByte16
-              case type_SimpleArraySignedByte16:
+              case SIMPLE_ARRAY_UNSIGNED_BYTE_32_WIDETAG:
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_30_WIDETAG
+              case SIMPLE_ARRAY_SIGNED_BYTE_30_WIDETAG:
+              case SIMPLE_ARRAY_UNSIGNED_BYTE_29_WIDETAG:
+#endif
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_32_WIDETAG
+              case SIMPLE_ARRAY_SIGNED_BYTE_32_WIDETAG:
+              case SIMPLE_ARRAY_UNSIGNED_BYTE_31_WIDETAG:
 #endif
                 vector = (struct vector *)addr;
-                count = CEILING(NWORDS(fixnum_value(vector->length),2)+2,2);
+                count = CEILING(NWORDS(fixnum_value(vector->length),32)+2,2);
                 break;
 
-              case type_SimpleArrayUnsignedByte32:
-#ifdef type_SimpleArraySignedByte30
-              case type_SimpleArraySignedByte30:
+#if N_WORD_BITS == 64
+              case SIMPLE_ARRAY_UNSIGNED_BYTE_64_WIDETAG:
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_61_WIDETAG
+              case SIMPLE_ARRAY_SIGNED_BYTE_61_WIDETAG:
+              case SIMPLE_ARRAY_UNSIGNED_BYTE_60_WIDETAG:
 #endif
-#ifdef type_SimpleArraySignedByte32
-              case type_SimpleArraySignedByte32:
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_64_WIDETAG
+              case SIMPLE_ARRAY_SIGNED_BYTE_64_WIDETAG:
+              case SIMPLE_ARRAY_UNSIGNED_BYTE_63_WIDETAG:
 #endif
                 vector = (struct vector *)addr;
-                count = CEILING(fixnum_value(vector->length)+2,2);
+                count = CEILING(NWORDS(fixnum_value(vector->length),64)+2,2);
                 break;
+#endif
 
-              case type_SimpleArraySingleFloat:
+              case SIMPLE_ARRAY_SINGLE_FLOAT_WIDETAG:
                 vector = (struct vector *)addr;
-                count = CEILING(fixnum_value(vector->length)+2,2);
+                count = CEILING(NWORDS(fixnum_value(vector->length), 32) + 2,
+                                2);
                 break;
 
-              case type_SimpleArrayDoubleFloat:
-#ifdef type_SimpleArrayComplexSingleFloat
-              case type_SimpleArrayComplexSingleFloat:
+              case SIMPLE_ARRAY_DOUBLE_FLOAT_WIDETAG:
+#ifdef SIMPLE_ARRAY_COMPLEX_SINGLE_FLOAT_WIDETAG
+              case SIMPLE_ARRAY_COMPLEX_SINGLE_FLOAT_WIDETAG:
 #endif
                 vector = (struct vector *)addr;
-                count = fixnum_value(vector->length)*2+2;
+                count = CEILING(NWORDS(fixnum_value(vector->length), 64) + 2,
+                                2);
                 break;
 
-#ifdef type_SimpleArrayLongFloat
-              case type_SimpleArrayLongFloat:
+#ifdef SIMPLE_ARRAY_LONG_FLOAT_WIDETAG
+              case SIMPLE_ARRAY_LONG_FLOAT_WIDETAG:
                 vector = (struct vector *)addr;
-#ifdef __i386__
+#ifdef LISP_FEATURE_X86
                 count = fixnum_value(vector->length)*3+2;
 #endif
-#ifdef sparc
+#ifdef LISP_FEATURE_SPARC
                 count = fixnum_value(vector->length)*4+2;
 #endif
                 break;
 #endif
 
-#ifdef type_SimpleArrayComplexDoubleFloat
-              case type_SimpleArrayComplexDoubleFloat:
+#ifdef SIMPLE_ARRAY_COMPLEX_DOUBLE_FLOAT_WIDETAG
+              case SIMPLE_ARRAY_COMPLEX_DOUBLE_FLOAT_WIDETAG:
                 vector = (struct vector *)addr;
-                count = fixnum_value(vector->length)*4+2;
+                count = CEILING(NWORDS(fixnum_value(vector->length), 128) + 2,
+                                2);
                 break;
 #endif
 
-#ifdef type_SimpleArrayComplexLongFloat
-              case type_SimpleArrayComplexLongFloat:
+#ifdef SIMPLE_ARRAY_COMPLEX_LONG_FLOAT_WIDETAG
+              case SIMPLE_ARRAY_COMPLEX_LONG_FLOAT_WIDETAG:
                 vector = (struct vector *)addr;
-#ifdef __i386__
+#ifdef LISP_FEATURE_X86
                 count = fixnum_value(vector->length)*6+2;
 #endif
-#ifdef sparc
+#ifdef LISP_FEATURE_SPARC
                 count = fixnum_value(vector->length)*8+2;
 #endif
                 break;
 #endif
 
-              case type_CodeHeader:
-#ifndef __i386__
+              case CODE_HEADER_WIDETAG:
+#if !defined(LISP_FEATURE_X86) && !defined(LISP_FEATURE_X86_64)
                 gc_abort(); /* no code headers in static space */
 #else
-               count = pscav_code((struct code*)addr);
+                count = pscav_code((struct code*)addr);
 #endif
                 break;
 
-              case type_FunctionHeader:
-              case type_ClosureFunctionHeader:
-              case type_ReturnPcHeader:
+              case SIMPLE_FUN_HEADER_WIDETAG:
+              case RETURN_PC_HEADER_WIDETAG:
                 /* We should never hit any of these, 'cause they occur
                  * buried in the middle of code objects. */
                 gc_abort();
-               break;
-
-#ifdef __i386__
-             case type_ClosureHeader:
-             case type_FuncallableInstanceHeader:
-             case type_ByteCodeFunction:
-             case type_ByteCodeClosure:
-               /* The function self pointer needs special care on the
-                * x86 because it is the real entry point. */
-               {
-                 lispobj fun = ((struct closure *)addr)->function
-                   - RAW_ADDR_OFFSET;
-                 pscav(&fun, 1, constant);
-                 ((struct closure *)addr)->function = fun + RAW_ADDR_OFFSET;
-               }
-               count = 2;
-               break;
-#endif
-
-              case type_WeakPointer:
+                break;
+
+#if defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
+              case CLOSURE_HEADER_WIDETAG:
+                /* The function self pointer needs special care on the
+                 * x86 because it is the real entry point. */
+                {
+                  lispobj fun = ((struct closure *)addr)->fun
+                    - FUN_RAW_ADDR_OFFSET;
+                  pscav(&fun, 1, constant);
+                  ((struct closure *)addr)->fun = fun + FUN_RAW_ADDR_OFFSET;
+                }
+                count = 2;
+                break;
+#endif
+
+              case WEAK_POINTER_WIDETAG:
                 /* Weak pointers get preserved during purify, 'cause I
-                * don't feel like figuring out how to break them. */
+                 * don't feel like figuring out how to break them. */
                 pscav(addr+1, 2, constant);
                 count = 4;
                 break;
 
-             case type_Fdefn:
-               /* We have to handle fdefn objects specially, so we
-                * can fix up the raw function address. */
-               count = pscav_fdefn((struct fdefn *)addr);
-               break;
+              case FDEFN_WIDETAG:
+                /* We have to handle fdefn objects specially, so we
+                 * can fix up the raw function address. */
+                count = pscav_fdefn((struct fdefn *)addr);
+                break;
+
+              case INSTANCE_HEADER_WIDETAG:
+                {
+                    struct instance *instance = (struct instance *) addr;
+                    struct layout *layout
+                        = (struct layout *) native_pointer(instance->slots[0]);
+                    long nuntagged = fixnum_value(layout->n_untagged_slots);
+                    long nslots = HeaderValue(*addr);
+                    pscav(addr + 1, nslots - nuntagged, constant);
+                    count = CEILING(1 + nslots, 2);
+                }
+                break;
 
               default:
                 count = 1;
@@ -1365,44 +1410,66 @@ static lispobj *pscav(lispobj *addr, int nwords, boolean constant)
     return addr;
 }
 
-int purify(lispobj static_roots, lispobj read_only_roots)
+int
+purify(lispobj static_roots, lispobj read_only_roots)
 {
     lispobj *clean;
-    int count, i;
+    long count, i;
     struct later *laters, *next;
+    struct thread *thread;
+
+    if(all_threads->next) {
+        /* FIXME: there should be _some_ sensible error reporting
+         * convention.  See following comment too */
+        fprintf(stderr,"Can't purify when more than one thread exists\n");
+        fflush(stderr);
+        return 0;
+    }
 
 #ifdef PRINTNOISE
     printf("[doing purification:");
     fflush(stdout);
 #endif
-
-    if (fixnum_value(SymbolValue(FREE_INTERRUPT_CONTEXT_INDEX)) != 0) {
-       /* FIXME: 1. What does this mean? 2. It shouldn't be reporting
-        * its error simply by a. printing a string b. to stdout instead
-        * of stderr. */
+#ifdef LISP_FEATURE_GENCGC
+    gc_alloc_update_all_page_tables();
+#endif
+    for_each_thread(thread)
+        if (fixnum_value(SymbolValue(FREE_INTERRUPT_CONTEXT_INDEX,thread)) != 0) {
+        /* FIXME: 1. What does this mean? 2. It shouldn't be reporting
+         * its error simply by a. printing a string b. to stdout instead
+         * of stderr. */
         printf(" Ack! Can't purify interrupt contexts. ");
         fflush(stdout);
         return 0;
     }
 
-#if defined(ibmrt) || defined(__i386__)
-    dynamic_space_free_pointer =
-      (lispobj*)SymbolValue(ALLOCATION_POINTER);
+#if defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
+    dynamic_space_purify_pointer =
+      (lispobj*)SymbolValue(ALLOCATION_POINTER,0);
+#else
+#if defined(LISP_FEATURE_GENCGC)
+    dynamic_space_purify_pointer = get_alloc_pointer();
+#else
+    dynamic_space_purify_pointer = dynamic_space_free_pointer;
+#endif
 #endif
 
     read_only_end = read_only_free =
-        (lispobj *)SymbolValue(READ_ONLY_SPACE_FREE_POINTER);
+        (lispobj *)SymbolValue(READ_ONLY_SPACE_FREE_POINTER,0);
     static_end = static_free =
-        (lispobj *)SymbolValue(STATIC_SPACE_FREE_POINTER);
+        (lispobj *)SymbolValue(STATIC_SPACE_FREE_POINTER,0);
 
 #ifdef PRINTNOISE
     printf(" roots");
     fflush(stdout);
 #endif
 
-#ifdef GENCGC
-    gc_assert((lispobj *)CONTROL_STACK_END > ((&read_only_roots)+1));
-    setup_i386_stack_scav(((&static_roots)-2), (lispobj *)CONTROL_STACK_END);
+#if defined(LISP_FEATURE_GENCGC) && (defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64))
+    /* note this expects only one thread to be active.  We'd have to
+     * stop all the others in the same way as GC does if we wanted
+     * PURIFY to work when >1 thread exists */
+    setup_i386_stack_scav(((&static_roots)-2),
+                          ((void *)all_threads->control_stack_end));
 #endif
 
     pscav(&static_roots, 1, 0);
@@ -1420,46 +1487,60 @@ int purify(lispobj static_roots, lispobj read_only_roots)
     printf(" stack");
     fflush(stdout);
 #endif
-#ifndef __i386__
-    pscav((lispobj *)control_stack,
-         current_control_stack_pointer - (lispobj *)CONTROL_STACK_START,
-         0);
+#if !defined(LISP_FEATURE_X86) && !defined(LISP_FEATURE_X86_64)
+    pscav((lispobj *)all_threads->control_stack_start,
+          current_control_stack_pointer -
+          all_threads->control_stack_start,
+          0);
 #else
-#ifdef GENCGC
+#ifdef LISP_FEATURE_GENCGC
     pscav_i386_stack();
 #endif
-#ifdef WANT_CGC
-    gc_assert((lispobj *)control_stack_end > ((&read_only_roots)+1));
-    carefully_pscav_stack(((&read_only_roots)+1),
-                         (lispobj *)CONTROL_STACK_END);
-#endif
 #endif
 
 #ifdef PRINTNOISE
     printf(" bindings");
     fflush(stdout);
 #endif
-#if !defined(ibmrt) && !defined(__i386__)
-    pscav(BINDING_STACK_START,
-         current_binding_stack_pointer - (lispobj *)BINDING_STACK_START,
-         0);
+#if !(defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64))
+    pscav( (lispobj *)all_threads->binding_stack_start,
+          (lispobj *)current_binding_stack_pointer -
+           all_threads->binding_stack_start,
+          0);
 #else
-    pscav(BINDING_STACK_START,
-         (lispobj *)SymbolValue(BINDING_STACK_POINTER) -
-         (lispobj *)BINDING_STACK_START,
-         0);
+    for_each_thread(thread) {
+        pscav( (lispobj *)thread->binding_stack_start,
+               (lispobj *)SymbolValue(BINDING_STACK_POINTER,thread) -
+               (lispobj *)thread->binding_stack_start,
+          0);
+#ifdef LISP_FEATURE_SB_THREAD
+        pscav( (lispobj *) (thread+1),
+               fixnum_value(SymbolValue(FREE_TLS_INDEX,0)) -
+               (sizeof (struct thread))/(sizeof (lispobj)),
+          0);
 #endif
+    }
+
 
-#ifdef SCAVENGE_READ_ONLY_SPACE
-    if (SymbolValue(SCAVENGE_READ_ONLY_SPACE) != type_UnboundMarker
-       && SymbolValue(SCAVENGE_READ_ONLY_SPACE) != NIL) {
+#endif
+
+    /* The original CMU CL code had scavenge-read-only-space code
+     * controlled by the Lisp-level variable
+     * *SCAVENGE-READ-ONLY-SPACE*. It was disabled by default, and it
+     * wasn't documented under what circumstances it was useful or
+     * safe to turn it on, so it's been turned off in SBCL. If you
+     * want/need this functionality, and can test and document it,
+     * please submit a patch. */
+#if 0
+    if (SymbolValue(SCAVENGE_READ_ONLY_SPACE) != UNBOUND_MARKER_WIDETAG
+        && SymbolValue(SCAVENGE_READ_ONLY_SPACE) != NIL) {
       unsigned  read_only_space_size =
-         (lispobj *)SymbolValue(READ_ONLY_SPACE_FREE_POINTER) -
-         (lispobj *)READ_ONLY_SPACE_START;
+          (lispobj *)SymbolValue(READ_ONLY_SPACE_FREE_POINTER) -
+          (lispobj *)READ_ONLY_SPACE_START;
       fprintf(stderr,
-             "scavenging read only space: %d bytes\n",
-             read_only_space_size * sizeof(lispobj));
-      pscav(READ_ONLY_SPACE_START, read_only_space_size, 0);
+              "scavenging read only space: %d bytes\n",
+              read_only_space_size * sizeof(lispobj));
+      pscav( (lispobj *)READ_ONLY_SPACE_START, read_only_space_size, 0);
     }
 #endif
 
@@ -1484,7 +1565,7 @@ int purify(lispobj static_roots, lispobj read_only_roots)
                     i++;
                 } else {
                     pscav(laters->u[i].ptr, 1, 1);
-               }
+                }
             }
             next = laters->next;
             free(laters);
@@ -1498,71 +1579,37 @@ int purify(lispobj static_roots, lispobj read_only_roots)
     fflush(stdout);
 #endif
 
-#if defined(WANT_CGC) && defined(X86_CGC_ACTIVE_P)
-    if(SymbolValue(X86_CGC_ACTIVE_P) != T) {
-       os_zero((os_vm_address_t) DYNAMIC_SPACE_START,
-               (os_vm_size_t) DYNAMIC_SPACE_SIZE);
-    }
-#else
-    os_zero((os_vm_address_t) DYNAMIC_SPACE_START,
-            (os_vm_size_t) DYNAMIC_SPACE_SIZE);
-#endif
+    os_zero((os_vm_address_t) current_dynamic_space,
+            (os_vm_size_t) dynamic_space_size);
 
     /* Zero the stack. Note that the stack is also zeroed by SUB-GC
      * calling SCRUB-CONTROL-STACK - this zeros the stack on the x86. */
-#ifndef __i386__
+#if !defined(LISP_FEATURE_X86) && !defined(LISP_FEATURE_X86_64)
     os_zero((os_vm_address_t) current_control_stack_pointer,
-            (os_vm_size_t) (CONTROL_STACK_SIZE -
-                            ((current_control_stack_pointer -
-                             (lispobj *)CONTROL_STACK_START) *
-                             sizeof(lispobj))));
-#endif
-
-#if defined(WANT_CGC) && defined(STATIC_BLUE_BAG)
-    {
-      lispobj bag = SymbolValue(STATIC_BLUE_BAG);
-      struct cons*cons = (struct cons*)static_free;
-      struct cons*pair = cons + 1;
-      static_free += 2*WORDS_PER_CONS;
-      if(bag == type_UnboundMarker)
-       bag = NIL;
-      cons->cdr = bag;
-      cons->car = (lispobj)pair | type_ListPointer;
-      pair->car = (lispobj)static_end;
-      pair->cdr = (lispobj)static_free;
-      bag = (lispobj)cons | type_ListPointer;
-      SetSymbolValue(STATIC_BLUE_BAG, bag);
-    }
+            (os_vm_size_t)
+            ((all_threads->control_stack_end -
+              current_control_stack_pointer) * sizeof(lispobj)));
 #endif
 
     /* It helps to update the heap free pointers so that free_heap can
      * verify after it's done. */
-    SetSymbolValue(READ_ONLY_SPACE_FREE_POINTER, (lispobj)read_only_free);
-    SetSymbolValue(STATIC_SPACE_FREE_POINTER, (lispobj)static_free);
+    SetSymbolValue(READ_ONLY_SPACE_FREE_POINTER, (lispobj)read_only_free,0);
+    SetSymbolValue(STATIC_SPACE_FREE_POINTER, (lispobj)static_free,0);
 
-#if !defined(ibmrt) && !defined(__i386__)
-    dynamic_space_free_pointer = DYNAMIC_SPACE_START;
-#else
-#if defined(WANT_CGC) && defined(X86_CGC_ACTIVE_P)
-    /* X86 using CGC */
-    if(SymbolValue(X86_CGC_ACTIVE_P) != T)
-       SetSymbolValue(ALLOCATION_POINTER, (lispobj)DYNAMIC_SPACE_START);
-    else
-       cgc_free_heap();
-#else
-#if defined GENCGC
+#if defined LISP_FEATURE_GENCGC
     gc_free_heap();
 #else
-    /* ibmrt using GC */
-    SetSymbolValue(ALLOCATION_POINTER, (lispobj)DYNAMIC_SPACE_START);
-#endif
-#endif
+    dynamic_space_free_pointer = current_dynamic_space;
+    set_auto_gc_trigger(bytes_consed_between_gcs);
 #endif
 
+    /* Blast away instruction cache */
+    os_flush_icache((os_vm_address_t)READ_ONLY_SPACE_START, READ_ONLY_SPACE_SIZE);
+    os_flush_icache((os_vm_address_t)STATIC_SPACE_START, STATIC_SPACE_SIZE);
+
 #ifdef PRINTNOISE
     printf(" done]\n");
     fflush(stdout);
 #endif
-
     return 0;
 }