src/compiler/generic/target-core.lisp

   1 ;;;; target-only code that knows how to load compiled code directly
   2 ;;;; into core
   3 ;;;;
   4 ;;;; FIXME: The filename here is confusing because "core" here means
   5 ;;;; "main memory", while elsewhere in the system it connotes a
   6 ;;;; ".core" file dumping the contents of main memory.
   7
   8 ;;;; This software is part of the SBCL system. See the README file for
   9 ;;;; more information.
  10 ;;;;
  11 ;;;; This software is derived from the CMU CL system, which was
  12 ;;;; written at Carnegie Mellon University and released into the
  13 ;;;; public domain. The software is in the public domain and is
  14 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
  15 ;;;; files for more information.
  16
  17 (in-package "SB!C")
  18
  19 (declaim (ftype (function (fixnum fixnum) (values code-component &optional))
  20                 allocate-code-object))
  21 (defun allocate-code-object (boxed unboxed)
  22   #!+gencgc
  23   (without-gcing
  24     (%make-lisp-obj
  25      (alien-funcall (extern-alien "alloc_code_object" (function unsigned-long unsigned unsigned))
  26                     boxed unboxed)))
  27   #!-gencgc
  28   (%primitive allocate-code-object boxed unboxed))
  29
  30 ;;; Make a function entry, filling in slots from the ENTRY-INFO.
  31 (defun make-fun-entry (entry-info code-obj object)
  32   (declare (type entry-info entry-info) (type core-object object))
  33   (let ((offset (label-position (entry-info-offset entry-info))))
  34     (declare (type index offset))
  35     (unless (zerop (logand offset sb!vm:lowtag-mask))
  36       (error "Unaligned function object, offset = #X~X." offset))
  37     (let ((res (%primitive compute-fun code-obj offset)))
  38       (setf (%simple-fun-self res) res)
  39       (setf (%simple-fun-next res) (%code-entry-points code-obj))
  40       (setf (%code-entry-points code-obj) res)
  41       (setf (%simple-fun-name res) (entry-info-name entry-info))
  42       (setf (%simple-fun-arglist res) (entry-info-arguments entry-info))
  43       (setf (%simple-fun-type res) (entry-info-type entry-info))
  44       (setf (%simple-fun-xrefs res) (entry-info-xref entry-info))
  45
  46       (note-fun entry-info res object))))
  47
  48 ;;; Dump a component to core. We pass in the assembler fixups, code
  49 ;;; vector and node info.
  50 (defun make-core-component (component segment length trace-table fixup-notes object)
  51   (declare (type component component)
  52            (type sb!assem:segment segment)
  53            (type index length)
  54            (list trace-table fixup-notes)
  55            (type core-object object))
  56   (without-gcing
  57     (let* ((2comp (component-info component))
  58            (constants (ir2-component-constants 2comp))
  59            (trace-table (pack-trace-table trace-table))
  60            (trace-table-len (length trace-table))
  61            (trace-table-bits (* trace-table-len tt-bits-per-entry))
  62            (total-length (+ length
  63                             (ceiling trace-table-bits sb!vm:n-byte-bits)))
  64            (box-num (- (length constants) sb!vm:code-trace-table-offset-slot))
  65            (code-obj (allocate-code-object box-num total-length))
  66            (fill-ptr (code-instructions code-obj)))
  67       (declare (type index box-num total-length))
  68
  69       (sb!assem:on-segment-contents-vectorly
  70        segment
  71        (lambda (v)
  72          (declare (type (simple-array sb!assem:assembly-unit 1) v))
  73          (copy-byte-vector-to-system-area v fill-ptr)
  74          (setf fill-ptr (sap+ fill-ptr (length v)))))
  75
  76       (do-core-fixups code-obj fixup-notes)
  77
  78       (dolist (entry (ir2-component-entries 2comp))
  79         (make-fun-entry entry code-obj object))
  80
  81       (sb!vm:sanctify-for-execution code-obj)
  82
  83       (let ((info (debug-info-for-component component)))
  84         (push info (core-object-debug-info object))
  85         (setf (%code-debug-info code-obj) info))
  86
  87       (setf (code-header-ref code-obj sb!vm:code-trace-table-offset-slot)
  88             length)
  89       ;; KLUDGE: the "old" COPY-TO-SYSTEM-AREA automagically worked if
  90       ;; somebody changed the number of bytes in a trace table entry.
  91       ;; This version is a bit more fragile; if only there were some way
  92       ;; to insulate ourselves against changes like that...
  93       ;;
  94       ;; Then again, PACK-TRACE-TABLE in src/compiler/trace-table.lisp
  95       ;; doesn't appear to do anything interesting, returning a 0-length
  96       ;; array.  So it seemingly doesn't matter what we do here.  Is this
  97       ;; stale code?
  98       ;;   --njf, 2005-03-23
  99       (copy-ub16-to-system-area trace-table 0 fill-ptr 0 trace-table-len)
 100
 101       (do ((index sb!vm:code-constants-offset (1+ index)))
 102           ((>= index (length constants)))
 103         (let ((const (aref constants index)))
 104           (etypecase const
 105             (null)
 106             (constant
 107              (setf (code-header-ref code-obj index)
 108                    (constant-value const)))
 109             (list
 110              (ecase (car const)
 111                (:entry
 112                 (reference-core-fun code-obj index (cdr const) object))
 113                (:fdefinition
 114                 (setf (code-header-ref code-obj index)
 115                       (fdefinition-object (cdr const) t))))))))))
 116   (values))