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target-core.lisp    100 lines (87 with data), 3.8 kB

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;;;; target-only code that knows how to load compiled code directly
;;;; into core
;;;;
;;;; FIXME: The filename here is confusing because "core" here means
;;;; "main memory", while elsewhere in the system it connotes a
;;;; ".core" file dumping the contents of main memory.
;;;; This software is part of the SBCL system. See the README file for
;;;; more information.
;;;;
;;;; This software is derived from the CMU CL system, which was
;;;; written at Carnegie Mellon University and released into the
;;;; public domain. The software is in the public domain and is
;;;; provided with absolutely no warranty. See the COPYING and CREDITS
;;;; files for more information.
(in-package "SB!C")
;;; Make a function entry, filling in slots from the ENTRY-INFO.
(defun make-fun-entry (entry-info code-obj object)
(declare (type entry-info entry-info) (type core-object object))
(let ((offset (label-position (entry-info-offset entry-info))))
(declare (type index offset))
(unless (zerop (logand offset sb!vm:lowtag-mask))
(error "Unaligned function object, offset = #X~X." offset))
(let ((res (%primitive compute-fun code-obj offset)))
(setf (%simple-fun-self res) res)
(setf (%simple-fun-next res) (%code-entry-points code-obj))
(setf (%code-entry-points code-obj) res)
(setf (%simple-fun-name res) (entry-info-name entry-info))
(setf (%simple-fun-arglist res) (entry-info-arguments entry-info))
(setf (%simple-fun-type res) (entry-info-type entry-info))
(note-fun entry-info res object))))
;;; Dump a component to core. We pass in the assembler fixups, code
;;; vector and node info.
(defun make-core-component (component segment length trace-table fixup-notes object)
(declare (type component component)
(type sb!assem:segment segment)
(type index length)
(list trace-table fixup-notes)
(type core-object object))
(without-gcing
(let* ((2comp (component-info component))
(constants (ir2-component-constants 2comp))
(trace-table (pack-trace-table trace-table))
(trace-table-len (length trace-table))
(trace-table-bits (* trace-table-len tt-bits-per-entry))
(total-length (+ length
(ceiling trace-table-bits sb!vm:n-byte-bits)))
(box-num (- (length constants) sb!vm:code-trace-table-offset-slot))
(code-obj
(%primitive allocate-code-object box-num total-length))
(fill-ptr (code-instructions code-obj)))
(declare (type index box-num total-length))
(sb!assem:on-segment-contents-vectorly
segment
(lambda (v)
(declare (type (simple-array sb!assem:assembly-unit 1) v))
(copy-byte-vector-to-system-area v fill-ptr)
(setf fill-ptr (sap+ fill-ptr (length v)))))
(do-core-fixups code-obj fixup-notes)
(dolist (entry (ir2-component-entries 2comp))
(make-fun-entry entry code-obj object))
(sb!vm:sanctify-for-execution code-obj)
(let ((info (debug-info-for-component component)))
(push info (core-object-debug-info object))
(setf (%code-debug-info code-obj) info))
(setf (code-header-ref code-obj sb!vm:code-trace-table-offset-slot)
length)
(copy-to-system-area trace-table
(* sb!vm:vector-data-offset sb!vm:n-word-bits)
fill-ptr
0
trace-table-bits)
(do ((index sb!vm:code-constants-offset (1+ index)))
((>= index (length constants)))
(let ((const (aref constants index)))
(etypecase const
(null)
(constant
(setf (code-header-ref code-obj index)
(constant-value const)))
(list
(ecase (car const)
(:entry
(reference-core-fun code-obj index (cdr const) object))
(:fdefinition
(setf (code-header-ref code-obj index)
(fdefinition-object (cdr const) t))))))))))
(values))