0.8.20.21:
[sbcl.git] / src / runtime / purify.c
index 843b821..35635ee 100644 (file)
 #include <sys/types.h>
 #include <stdlib.h>
 #include <strings.h>
-#if (defined(LISP_FEATURE_SB_THREAD) && defined(LISP_FEATURE_LINUX))
-#include <sys/ptrace.h>
-#include <linux/user.h>
-#endif
 #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"
+#include "fixnump.h"
 #include "gc.h"
 #include "gc-internal.h"
 #include "thread.h"
 
 #define PRINTNOISE
 
-#if defined(__i386__)
-/* again, what's so special about the x86 that this is differently
- * visible there than on other platforms? -dan 20010125 
+#if defined(LISP_FEATURE_GENCGC)
+/* this is another artifact of the poor integration between gencgc and
+ * the rest of the runtime: on cheney gc there is a global
+ * dynamic_space_free_pointer which is valid whenever foreign function
+ * call is active, but in gencgc there's no such variable and we have
+ * to keep our own
  */
 static lispobj *dynamic_space_free_pointer;
 #endif
+extern unsigned long bytes_consed_between_gcs;
 
 #define gc_abort() \
   lose("GC invariant lost, file \"%s\", line %d", __FILE__, __LINE__)
@@ -65,7 +66,7 @@ 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
@@ -75,13 +76,16 @@ later {
     struct later *next;
     union {
         lispobj *ptr;
-        int count;
+        long count;
     } u[LATERBLOCKSIZE];
 } *later_blocks = NULL;
-static int later_count = 0;
+static long later_count = 0;
 
-#define CEILING(x,y) (((x) + ((y) - 1)) & (~((y) - 1)))
-#define NWORDS(x,y) (CEILING((x),(y)) / (y))
+#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
 
 /* FIXME: Shouldn't this be defined in sbcl.h?  See also notes in
  * cheneygc.c */
@@ -104,7 +108,7 @@ forwarding_pointer_p(lispobj obj)
 static boolean
 dynamic_pointer_p(lispobj ptr)
 {
-#ifndef __i386__
+#ifndef LISP_FEATURE_GENCGC
     return (ptr >= (lispobj)current_dynamic_space
            &&
            ptr < (lispobj)dynamic_space_free_pointer);
@@ -116,8 +120,24 @@ dynamic_pointer_p(lispobj ptr)
 #endif
 }
 
+static inline lispobj *
+newspace_alloc(long nwords, int constantp) 
+{
+    lispobj *ret;
+    nwords=CEILING(nwords,2);
+    if(constantp) {
+       ret=read_only_free;
+       read_only_free+=nwords;
+    } else {
+       ret=static_free;
+       static_free+=nwords;
+    }
+    return ret;
+}
+
+
 \f
-#ifdef __i386__
+#if defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
 
 #ifdef LISP_FEATURE_GENCGC
 /*
@@ -132,17 +152,13 @@ dynamic_pointer_p(lispobj ptr)
 
 static unsigned pointer_filter_verbose = 0;
 
-/* FIXME: This is substantially the same code as in gencgc.c. (There
- * are some differences, at least (1) the gencgc.c code needs to worry
- * about return addresses on the stack pinning code objects, (2) the
- * gencgc.c code needs to worry about the GC maybe happening in an
- * interrupt service routine when the main thread of control was
- * interrupted just as it had allocated memory and before it
- * initialized it, while PURIFY needn't worry about that, and (3) the
- * gencgc.c code has mutated more under maintenance since the fork
- * from CMU CL than the code here has.) The two versions should be
- * made to explicitly share common code, instead of just two different
- * cut-and-pasted versions. */
+/* 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)
 {
@@ -163,84 +179,94 @@ valid_dynamic_space_pointer(lispobj *pointer, lispobj *start_addr)
            break;
        case CLOSURE_HEADER_WIDETAG:
        case FUNCALLABLE_INSTANCE_HEADER_WIDETAG:
-           if ((int)pointer != ((int)start_addr+FUN_POINTER_LOWTAG)) {
+           if ((long)pointer != ((long)start_addr+FUN_POINTER_LOWTAG)) {
                if (pointer_filter_verbose) {
-                   fprintf(stderr,"*Wf2: %x %x %x\n", (unsigned int) pointer, 
-                           (unsigned int) start_addr, *start_addr);
+                   fprintf(stderr,"*Wf2: %x %x %x\n", 
+                           (unsigned long) pointer, 
+                           (unsigned long) start_addr, *start_addr);
                }
                return 0;
            }
            break;
        default:
            if (pointer_filter_verbose) {
-               fprintf(stderr,"*Wf3: %x %x %x\n", (unsigned int) pointer, 
-                       (unsigned int) start_addr, *start_addr);
+               fprintf(stderr,"*Wf3: %x %x %x\n", (unsigned long) pointer, 
+                       (unsigned long) start_addr, *start_addr);
            }
            return 0;
        }
        break;
     case LIST_POINTER_LOWTAG:
-       if ((int)pointer != ((int)start_addr+LIST_POINTER_LOWTAG)) {
+       if ((long)pointer != ((long)start_addr+LIST_POINTER_LOWTAG)) {
            if (pointer_filter_verbose)
-               fprintf(stderr,"*Wl1: %x %x %x\n", (unsigned int) pointer, 
-                       (unsigned int) start_addr, *start_addr);
+               fprintf(stderr,"*Wl1: %x %x %x\n", (unsigned long) pointer, 
+                       (unsigned long) start_addr, *start_addr);
            return 0;
        }
        /* Is it plausible cons? */
        if ((is_lisp_pointer(start_addr[0])
-           || ((start_addr[0] & 3) == 0) /* fixnum */
-           || (widetag_of(start_addr[0]) == BASE_CHAR_WIDETAG)
+           || ((start_addr[0] & FIXNUM_TAG_MASK) == 0) /* fixnum */
+           || (widetag_of(start_addr[0]) == CHARACTER_WIDETAG)
+#if N_WORD_BITS == 64
+           || (widetag_of(start_addr[1]) == SINGLE_FLOAT_WIDETAG)
+#endif
            || (widetag_of(start_addr[0]) == UNBOUND_MARKER_WIDETAG))
           && (is_lisp_pointer(start_addr[1])
-              || ((start_addr[1] & 3) == 0) /* fixnum */
-              || (widetag_of(start_addr[1]) == BASE_CHAR_WIDETAG)
+              || ((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: %x %x %x\n", (unsigned int) pointer, 
-                       (unsigned int) start_addr, *start_addr);
+               fprintf(stderr,"*Wl2: %x %x %x\n", (unsigned long) pointer, 
+                       (unsigned long) start_addr, *start_addr);
            }
            return 0;
        }
     case INSTANCE_POINTER_LOWTAG:
-       if ((int)pointer != ((int)start_addr+INSTANCE_POINTER_LOWTAG)) {
+       if ((long)pointer != ((long)start_addr+INSTANCE_POINTER_LOWTAG)) {
            if (pointer_filter_verbose) {
-               fprintf(stderr,"*Wi1: %x %x %x\n", (unsigned int) pointer, 
-                       (unsigned int) start_addr, *start_addr);
+               fprintf(stderr,"*Wi1: %x %x %x\n", (unsigned long) pointer, 
+                       (unsigned long) start_addr, *start_addr);
            }
            return 0;
        }
        if (widetag_of(start_addr[0]) != INSTANCE_HEADER_WIDETAG) {
            if (pointer_filter_verbose) {
-               fprintf(stderr,"*Wi2: %x %x %x\n", (unsigned int) pointer, 
-                       (unsigned int) start_addr, *start_addr);
+               fprintf(stderr,"*Wi2: %x %x %x\n", (unsigned long) pointer, 
+                       (unsigned long) start_addr, *start_addr);
            }
            return 0;
        }
        break;
     case OTHER_POINTER_LOWTAG:
-       if ((int)pointer != ((int)start_addr+OTHER_POINTER_LOWTAG)) {
+       if ((long)pointer != ((long)start_addr+OTHER_POINTER_LOWTAG)) {
            if (pointer_filter_verbose) {
-               fprintf(stderr,"*Wo1: %x %x %x\n", (unsigned int) pointer, 
-                       (unsigned int) start_addr, *start_addr);
+               fprintf(stderr,"*Wo1: %x %x %x\n", (unsigned long) pointer, 
+                       (unsigned long) start_addr, *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] & 3) == 0)) {
+       if (is_lisp_pointer(start_addr[0]) || ((start_addr[0] & FIXNUM_TAG_MASK) == 0)) {
            if (pointer_filter_verbose) {
-               fprintf(stderr,"*Wo2: %x %x %x\n", (unsigned int) pointer, 
-                       (unsigned int) start_addr, *start_addr);
+               fprintf(stderr,"*Wo2: %x %x %x\n", (unsigned long) pointer, 
+                       (unsigned long) start_addr, *start_addr);
            }
            return 0;
        }
        switch (widetag_of(start_addr[0])) {
        case UNBOUND_MARKER_WIDETAG:
-       case BASE_CHAR_WIDETAG:
+       case CHARACTER_WIDETAG:
+#if N_WORD_BITS == 64
+       case SINGLE_FLOAT_WIDETAG:
+#endif
            if (pointer_filter_verbose) {
-               fprintf(stderr,"*Wo3: %x %x %x\n", (unsigned int) pointer, 
-                       (unsigned int) start_addr, *start_addr);
+               fprintf(stderr,"*Wo3: %x %x %x\n", (unsigned long) pointer, 
+                       (unsigned long) start_addr, *start_addr);
            }
            return 0;
 
@@ -248,15 +274,15 @@ valid_dynamic_space_pointer(lispobj *pointer, lispobj *start_addr)
        case CLOSURE_HEADER_WIDETAG:
        case FUNCALLABLE_INSTANCE_HEADER_WIDETAG:
            if (pointer_filter_verbose) {
-               fprintf(stderr,"*Wo4: %x %x %x\n", (unsigned int) pointer, 
-                       (unsigned int) start_addr, *start_addr);
+               fprintf(stderr,"*Wo4: %x %x %x\n", (unsigned long) pointer, 
+                       (unsigned long) start_addr, *start_addr);
            }
            return 0;
 
        case INSTANCE_HEADER_WIDETAG:
            if (pointer_filter_verbose) {
-               fprintf(stderr,"*Wo5: %x %x %x\n", (unsigned int) pointer, 
-                       (unsigned int) start_addr, *start_addr);
+               fprintf(stderr,"*Wo5: %x %x %x\n", (unsigned long) pointer, 
+                       (unsigned long) start_addr, *start_addr);
            }
            return 0;
 
@@ -274,7 +300,11 @@ valid_dynamic_space_pointer(lispobj *pointer, lispobj *start_addr)
        case COMPLEX_LONG_FLOAT_WIDETAG:
 #endif
        case SIMPLE_ARRAY_WIDETAG:
-       case COMPLEX_STRING_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:
@@ -283,18 +313,39 @@ valid_dynamic_space_pointer(lispobj *pointer, lispobj *start_addr)
        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_STRING_WIDETAG:
+       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
@@ -307,6 +358,12 @@ valid_dynamic_space_pointer(lispobj *pointer, lispobj *start_addr)
 #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
@@ -327,16 +384,16 @@ valid_dynamic_space_pointer(lispobj *pointer, lispobj *start_addr)
 
        default:
            if (pointer_filter_verbose) {
-               fprintf(stderr,"*Wo6: %x %x %x\n", (unsigned int) pointer, 
-                       (unsigned int) start_addr, *start_addr);
+               fprintf(stderr,"*Wo6: %x %x %x\n", (unsigned long) pointer, 
+                       (unsigned long) start_addr, *start_addr);
            }
            return 0;
        }
        break;
     default:
        if (pointer_filter_verbose) {
-           fprintf(stderr,"*W?: %x %x %x\n", (unsigned int) pointer, 
-                   (unsigned int) start_addr, *start_addr);
+           fprintf(stderr,"*W?: %x %x %x\n", (unsigned long) pointer, 
+                   (unsigned long) start_addr, *start_addr);
        }
        return 0;
     }
@@ -347,12 +404,12 @@ valid_dynamic_space_pointer(lispobj *pointer, lispobj *start_addr)
 
 #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
@@ -379,7 +436,7 @@ setup_i386_stack_scav(lispobj *lowaddr, lispobj *base)
                          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 + OTHER_POINTER_LOWTAG);
+                   (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);
@@ -399,7 +456,7 @@ setup_i386_stack_scav(lispobj *lowaddr, lispobj *base)
 static void
 pscav_i386_stack(void)
 {
-    int i;
+    long i;
 
     for (i = 0; i < num_valid_stack_locations; i++)
        pscav(valid_stack_locations[i], 1, 0);
@@ -410,13 +467,13 @@ pscav_i386_stack(void)
        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),
-                   (unsigned int) valid_stack_ra_code_objects[i], code_obj);
+                   (long)(*valid_stack_ra_locations[i])
+                   - ((long)valid_stack_ra_code_objects[i] - (long)code_obj),
+                   (unsigned long) valid_stack_ra_code_objects[i], code_obj);
        }
        *valid_stack_ra_locations[i] =
-           ((int)(*valid_stack_ra_locations[i])
-            - ((int)valid_stack_ra_code_objects[i] - (int)code_obj));
+           ((long)(*valid_stack_ra_locations[i])
+            - ((long)valid_stack_ra_code_objects[i] - (long)code_obj));
     }
 }
 #endif
@@ -424,7 +481,7 @@ pscav_i386_stack(void)
 
 \f
 static void
-pscav_later(lispobj *where, int count)
+pscav_later(lispobj *where, long count)
 {
     struct later *new;
 
@@ -455,21 +512,14 @@ pscav_later(lispobj *where, int count)
 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 *)native_pointer(thing);
-    if (constant) {
-        new = read_only_free;
-        read_only_free += CEILING(nwords, 2);
-    }
-    else {
-        new = static_free;
-        static_free += CEILING(nwords, 2);
-    }
+    new = newspace_alloc(nwords,constant);
 
     /* Copy it. */
     bcopy(old, new, nwords * sizeof(lispobj));
@@ -488,7 +538,7 @@ ptrans_boxed(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 constant)
+ptrans_instance(lispobj thing, lispobj header, boolean /* ignored */ constant)
 {
     lispobj layout = ((struct instance *)native_pointer(thing))->slots[0];
     lispobj pure = ((struct instance *)native_pointer(layout))->slots[15];
@@ -505,15 +555,14 @@ ptrans_instance(lispobj thing, lispobj header, boolean constant)
             * 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;
+           long nwords;
            lispobj result, *new, *old;
 
-           nwords = 1 + HeaderValue(header);
+           nwords = CEILING(1 + HeaderValue(header), 2);
 
            /* Allocate it */
            old = (lispobj *)native_pointer(thing);
-           new = static_free;
-           static_free += CEILING(nwords, 2);
+           new = newspace_alloc(nwords, 0); /*  inconstant */
 
            /* Copy it. */
            bcopy(old, new, nwords * sizeof(lispobj));
@@ -536,16 +585,15 @@ ptrans_instance(lispobj thing, lispobj header, boolean constant)
 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 *)native_pointer(thing);
-    new = static_free;
-    static_free += CEILING(nwords, 2);
+    new = newspace_alloc(nwords, 0);   /* inconstant */
 
     /* Copy it. */
     bcopy(old, new, nwords * sizeof(lispobj));
@@ -567,17 +615,16 @@ ptrans_fdefn(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 *)native_pointer(thing);
-    new = read_only_free;
-    read_only_free += CEILING(nwords, 2);
+    new = newspace_alloc(nwords,1);    /* always constant */
     
-    /* Copy it. */
+    /* copy it. */
     bcopy(old, new, nwords * sizeof(lispobj));
     
     /* Deposit forwarding pointer. */
@@ -588,25 +635,24 @@ ptrans_unboxed(lispobj thing, lispobj header)
 }
 
 static lispobj
-ptrans_vector(lispobj thing, int bits, int extra,
+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 *)native_pointer(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);
-    }
-
+    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 = make_lispobj(new, lowtag_of(thing));
@@ -618,11 +664,11 @@ 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;
+    long nheader_words, ncode_words, nwords;
     void  *constants_start_addr, *constants_end_addr;
     void  *code_start_addr, *code_end_addr;
     lispobj fixups = NIL;
@@ -633,10 +679,10 @@ apply_code_fixups_during_purify(struct code *old_code, struct code *new_code)
     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;
+    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. */
@@ -664,12 +710,11 @@ apply_code_fixups_during_purify(struct code *old_code, struct code *new_code)
            (struct vector *)native_pointer(*(lispobj *)fixups_vector);
     }
 
-    if (widetag_of(fixups_vector->header) ==
-       SIMPLE_ARRAY_UNSIGNED_BYTE_32_WIDETAG) {
+    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. */
-       int length = fixnum_value(fixups_vector->length);
-       int i;
+       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. */
@@ -679,7 +724,7 @@ apply_code_fixups_during_purify(struct code *old_code, struct code *new_code)
            /* 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)))
+               && (old_value<((unsigned)old_code + nwords * N_WORD_BYTES)))
                /* So add the dispacement. */
                *(unsigned *)((unsigned)code_start_addr + offset) = old_value
                    + displacement;
@@ -706,18 +751,18 @@ static lispobj
 ptrans_code(lispobj thing)
 {
     struct code *code, *new;
-    int nwords;
+    long nwords;
     lispobj func, result;
 
     code = (struct code *)native_pointer(thing);
-    nwords = HeaderValue(code->header) + fixnum_value(code->code_size);
+    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 LISP_FEATURE_X86
+#if defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
     apply_code_fixups_during_purify(code,new);
 #endif
 
@@ -739,11 +784,16 @@ ptrans_code(lispobj 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. */
@@ -757,13 +807,13 @@ ptrans_code(lispobj thing)
         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. */
+#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 simple_fun *)native_pointer(func))->self, 2, 1);
-#ifdef __i386__
+#if defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
        ((struct simple_fun *)native_pointer(func))->self
            += FUN_RAW_ADDR_OFFSET;
 #endif
@@ -776,7 +826,7 @@ ptrans_code(lispobj thing)
 static lispobj
 ptrans_func(lispobj thing, lispobj header)
 {
-    int nwords;
+    long nwords;
     lispobj code, *new, *old, result;
     struct simple_fun *function;
 
@@ -786,8 +836,7 @@ ptrans_func(lispobj thing, lispobj header)
      * Otherwise we have to do something strange, 'cause it is buried
      * inside a code object. */
 
-    if (widetag_of(header) == SIMPLE_FUN_HEADER_WIDETAG ||
-        widetag_of(header) == CLOSURE_FUN_HEADER_WIDETAG) {
+    if (widetag_of(header) == SIMPLE_FUN_HEADER_WIDETAG) {
 
        /* We can only end up here if the code object has not been
          * scavenged, because if it had been scavenged, forwarding pointers
@@ -809,22 +858,15 @@ ptrans_func(lispobj thing, lispobj header)
     }
     else {
        /* It's some kind of closure-like thing. */
-        nwords = 1 + HeaderValue(header);
+        nwords = CEILING(1 + HeaderValue(header), 2);
         old = (lispobj *)native_pointer(thing);
 
-       /* Allocate the new one. */
-       if (widetag_of(header) == FUNCALLABLE_INSTANCE_HEADER_WIDETAG) {
-           /* 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. */
+       /* Allocate the new one.  FINs *must* not go in read_only
+        * space.  Closures can; they never change */
 
-           new = read_only_free;
-           read_only_free += CEILING(nwords, 2);
-       }
+       new = newspace_alloc
+           (nwords,(widetag_of(header)!=FUNCALLABLE_INSTANCE_HEADER_WIDETAG));
+            
         /* Copy it. */
         bcopy(old, new, nwords * sizeof(lispobj));
 
@@ -862,25 +904,15 @@ 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 *)native_pointer(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;
-        }
+       new = (struct cons *) newspace_alloc(WORDS_PER_CONS,constant);
 
         /* Copy the cons cell and keep a pointer to the cdr. */
         new->car = old->car;
@@ -905,6 +937,7 @@ static lispobj
 ptrans_otherptr(lispobj thing, lispobj header, boolean constant)
 {
     switch (widetag_of(header)) {
+       /* FIXME: this needs a reindent */
       case BIGNUM_WIDETAG:
       case SINGLE_FLOAT_WIDETAG:
       case DOUBLE_FLOAT_WIDETAG:
@@ -921,12 +954,17 @@ ptrans_otherptr(lispobj thing, lispobj header, boolean constant)
       case COMPLEX_LONG_FLOAT_WIDETAG:
 #endif
       case SAP_WIDETAG:
-        return ptrans_unboxed(thing, header);
+         return ptrans_unboxed(thing, header);
 
       case RATIO_WIDETAG:
       case COMPLEX_WIDETAG:
       case SIMPLE_ARRAY_WIDETAG:
-      case COMPLEX_STRING_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);
@@ -938,14 +976,22 @@ ptrans_otherptr(lispobj thing, lispobj header, boolean constant)
       case SYMBOL_HEADER_WIDETAG:
         return ptrans_boxed(thing, header, 0);
 
-      case SIMPLE_STRING_WIDETAG:
+      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);
 
+#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 SIMPLE_VECTOR_WIDETAG:
-        return ptrans_vector(thing, 32, 0, 1, constant);
+        return ptrans_vector(thing, N_WORD_BITS, 0, 1, constant);
 
       case SIMPLE_ARRAY_UNSIGNED_BYTE_2_WIDETAG:
         return ptrans_vector(thing, 2, 0, 0, constant);
@@ -956,24 +1002,47 @@ ptrans_otherptr(lispobj thing, lispobj header, boolean constant)
       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 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 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
         return ptrans_vector(thing, 32, 0, 0, constant);
 
+#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);
 
@@ -982,7 +1051,7 @@ ptrans_otherptr(lispobj thing, lispobj header, boolean constant)
 
 #ifdef SIMPLE_ARRAY_LONG_FLOAT_WIDETAG
       case SIMPLE_ARRAY_LONG_FLOAT_WIDETAG:
-#ifdef __i386__
+#ifdef LISP_FEATURE_X86
         return ptrans_vector(thing, 96, 0, 0, constant);
 #endif
 #ifdef sparc
@@ -1002,7 +1071,7 @@ ptrans_otherptr(lispobj thing, lispobj header, boolean constant)
 
 #ifdef SIMPLE_ARRAY_COMPLEX_LONG_FLOAT_WIDETAG
       case SIMPLE_ARRAY_COMPLEX_LONG_FLOAT_WIDETAG:
-#ifdef __i386__
+#ifdef LISP_FEATURE_X86
         return ptrans_vector(thing, 192, 0, 0, constant);
 #endif
 #ifdef sparc
@@ -1020,13 +1089,14 @@ ptrans_otherptr(lispobj thing, lispobj header, boolean constant)
        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;
     }
 }
 
-static int
+static long
 pscav_fdefn(struct fdefn *fdefn)
 {
     boolean fix_func;
@@ -1039,14 +1109,15 @@ pscav_fdefn(struct fdefn *fdefn)
     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);
+    nwords = CEILING(HeaderValue(code->header) + fixnum_value(code->code_size),
+                    2);
 
     /* Arrange to scavenge the debug info later. */
     pscav_later(&code->debug_info, 1);
@@ -1062,14 +1133,14 @@ pscav_code(struct code*code)
         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
+#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 simple_fun *)native_pointer(func))->self, 2, 1);
-#ifdef __i386__
+#if defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
        ((struct simple_fun *)native_pointer(func))->self
            += FUN_RAW_ADDR_OFFSET;
 #endif
@@ -1081,10 +1152,10 @@ pscav_code(struct code*code)
 #endif
 
 static lispobj *
-pscav(lispobj *addr, int nwords, boolean constant)
+pscav(lispobj *addr, long nwords, boolean constant)
 {
     lispobj thing, *thingp, header;
-    int count = 0; /* (0 = dummy init value to stop GCC warning) */
+    long count = 0; /* (0 = dummy init value to stop GCC warning) */
     struct vector *vector;
 
     while (nwords > 0) {
@@ -1126,7 +1197,12 @@ 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 (widetag_of(thing)) {
@@ -1138,7 +1214,7 @@ pscav(lispobj *addr, int nwords, boolean constant)
 #endif
               case SAP_WIDETAG:
                 /* It's an unboxed simple object. */
-                count = HeaderValue(thing)+1;
+                count = CEILING(HeaderValue(thing)+1, 2);
                 break;
 
               case SIMPLE_VECTOR_WIDETAG:
@@ -1146,59 +1222,90 @@ pscav(lispobj *addr, int nwords, boolean constant)
                     *addr = (subtype_VectorMustRehash << N_WIDETAG_BITS) |
                         SIMPLE_VECTOR_WIDETAG;
                  }
-                count = 1;
+                count = 2;
                 break;
 
-              case SIMPLE_STRING_WIDETAG:
+             case SIMPLE_ARRAY_NIL_WIDETAG:
+               count = 2;
+               break;
+
+              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;
 
+#ifdef SIMPLE_CHARACTER_STRING_WIDETAG
+           case SIMPLE_CHARACTER_STRING_WIDETAG:
+               vector = (struct vector *)addr;
+               count = CEILING(NWORDS(fixnum_value(vector->length)+1,32)+2,2);
+               break;
+#endif
+
               case SIMPLE_BIT_VECTOR_WIDETAG:
                 vector = (struct vector *)addr;
-                count = CEILING(NWORDS(fixnum_value(vector->length),32)+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),16)+2,2);
+                count = CEILING(NWORDS(fixnum_value(vector->length),2)+2,2);
                 break;
 
               case SIMPLE_ARRAY_UNSIGNED_BYTE_4_WIDETAG:
                 vector = (struct vector *)addr;
-                count = CEILING(NWORDS(fixnum_value(vector->length),8)+2,2);
+                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),4)+2,2);
+                count = CEILING(NWORDS(fixnum_value(vector->length),8)+2,2);
                 break;
 
               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),2)+2,2);
+                count = CEILING(NWORDS(fixnum_value(vector->length),16)+2,2);
                 break;
 
               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(fixnum_value(vector->length)+2,2);
+                count = CEILING(NWORDS(fixnum_value(vector->length),32)+2,2);
                 break;
 
+#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 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(NWORDS(fixnum_value(vector->length),64)+2,2);
+                break;
+#endif
+
               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 SIMPLE_ARRAY_DOUBLE_FLOAT_WIDETAG:
@@ -1206,13 +1313,14 @@ pscav(lispobj *addr, int nwords, boolean constant)
               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 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
@@ -1224,14 +1332,15 @@ pscav(lispobj *addr, int nwords, boolean constant)
 #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 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
@@ -1241,7 +1350,7 @@ pscav(lispobj *addr, int nwords, boolean constant)
 #endif
 
               case CODE_HEADER_WIDETAG:
-#ifndef __i386__
+#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);
@@ -1249,14 +1358,13 @@ pscav(lispobj *addr, int nwords, boolean constant)
                 break;
 
               case SIMPLE_FUN_HEADER_WIDETAG:
-              case CLOSURE_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__
+#if defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
              case CLOSURE_HEADER_WIDETAG:
              case FUNCALLABLE_INSTANCE_HEADER_WIDETAG:
                /* The function self pointer needs special care on the
@@ -1305,10 +1413,18 @@ 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);
@@ -1326,7 +1442,7 @@ purify(lispobj static_roots, lispobj read_only_roots)
         return 0;
     }
 
-#if defined(__i386__)
+#if defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
     dynamic_space_free_pointer =
       (lispobj*)SymbolValue(ALLOCATION_POINTER,0);
 #endif
@@ -1341,24 +1457,10 @@ purify(lispobj static_roots, lispobj read_only_roots)
     fflush(stdout);
 #endif
 
-#if (defined(LISP_FEATURE_GENCGC) && defined(LISP_FEATURE_X86))
-#if 0
-    /* This is what we should do, but can't unless the threads in
-     * question are suspended with ptrace.  That's right, purify is not
-     * threadsafe
-     */
-    for_each_thread(thread) {
-       void **ptr;
-       struct user_regs_struct regs;
-       if(ptrace(PTRACE_GETREGS,thread->pid,0,&regs)){
-           fprintf(stderr,"child pid %d, %s\n",thread->pid,strerror(errno));
-           lose("PTRACE_GETREGS");
-       }
-       setup_i386_stack_scav(regs.ebp,
-                             ((void *)thread->control_stack_end));
-    }
-#endif /* 0 */
-    /* stopgap until we can set things up as in preceding comment */
+#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
@@ -1379,7 +1481,7 @@ purify(lispobj static_roots, lispobj read_only_roots)
     printf(" stack");
     fflush(stdout);
 #endif
-#ifndef __i386__
+#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,
@@ -1394,7 +1496,7 @@ purify(lispobj static_roots, lispobj read_only_roots)
     printf(" bindings");
     fflush(stdout);
 #endif
-#if !defined(__i386__)
+#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,
@@ -1474,12 +1576,11 @@ purify(lispobj static_roots, lispobj read_only_roots)
 
     /* 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) (THREAD_CONTROL_STACK_SIZE -
-                            ((current_control_stack_pointer -
-                             all_threads->control_stack_start)
-                            * sizeof(lispobj))));
+            (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
@@ -1487,8 +1588,9 @@ purify(lispobj static_roots, lispobj read_only_roots)
     SetSymbolValue(READ_ONLY_SPACE_FREE_POINTER, (lispobj)read_only_free,0);
     SetSymbolValue(STATIC_SPACE_FREE_POINTER, (lispobj)static_free,0);
 
-#if !defined(__i386__)
+#if !defined(ALLOCATION_POINTER)
     dynamic_space_free_pointer = current_dynamic_space;
+    set_auto_gc_trigger(bytes_consed_between_gcs);
 #else
 #if defined LISP_FEATURE_GENCGC
     gc_free_heap();
@@ -1501,6 +1603,5 @@ purify(lispobj static_roots, lispobj read_only_roots)
     printf(" done]\n");
     fflush(stdout);
 #endif
-
     return 0;
 }