src/code/hppa-vm.lisp

   1 (in-package "SB!VM")
   2 \f
   3 (define-alien-type os-context-t (struct os-context-t-struct))
   4 \f
   5 ;;;; MACHINE-TYPE and MACHINE-VERSION
   6
   7 (defun machine-type ()
   8   "Returns a string describing the type of the local machine."
   9   "HPPA")
  10
  11 ;;; support for CL:MACHINE-VERSION defined OAOO elsewhere
  12 (defun get-machine-version ()
  13   nil)
  14 \f
  15 ;;;; FIXUP-CODE-OBJECT
  16
  17 (defun fixup-code-object (code offset value kind)
  18   (unless (zerop (rem offset n-word-bytes))
  19     (error "Unaligned instruction?  offset=#x~X." offset))
  20   (sb!sys:without-gcing
  21    (let* ((sap (%primitive sb!kernel::code-instructions code))
  22           (inst (sap-ref-32 sap offset)))
  23      (setf (sap-ref-32 sap offset)
  24            (ecase kind
  25              (:load
  26               (logior (ash (ldb (byte 11 0) value) 1)
  27                       (logand inst #xffffc000)))
  28              (:load-short
  29               (let ((low-bits (ldb (byte 11 0) value)))
  30                 (aver (<= 0 low-bits (1- (ash 1 4))))
  31                 (logior (ash low-bits 17)
  32                         (logand inst #xffe0ffff))))
  33              (:hi
  34               (logior (ash (ldb (byte 5 13) value) 16)
  35                       (ash (ldb (byte 2 18) value) 14)
  36                       (ash (ldb (byte 2 11) value) 12)
  37                       (ash (ldb (byte 11 20) value) 1)
  38                       (ldb (byte 1 31) value)
  39                       (logand inst #xffe00000)))
  40              (:branch
  41               (let ((bits (ldb (byte 9 2) value)))
  42                 (aver (zerop (ldb (byte 2 0) value)))
  43                 (logior (ash bits 3)
  44                         (logand inst #xffe0e002)))))))))
  45 \f
  46 (define-alien-routine ("os_context_pc_addr" context-pc-addr) (* unsigned-int)
  47   (context (* os-context-t)))
  48
  49 (defun context-pc (context)
  50   (declare (type (alien (* os-context-t)) context))
  51   (int-sap (logandc2 (deref (context-pc-addr context)) 3)))
  52
  53 (define-alien-routine ("os_context_register_addr" context-register-addr)
  54   (* unsigned-int)
  55   (context (* os-context-t))
  56   (index int))
  57
  58 ;;; FIXME: Should this and CONTEXT-PC be INLINE to reduce consing?
  59 ;;; (Are they used in anything time-critical, or just the debugger?)
  60 (defun context-register (context index)
  61   (declare (type (alien (* os-context-t)) context))
  62   (deref (context-register-addr context index)))
  63
  64 (defun %set-context-register (context index new)
  65 (declare (type (alien (* os-context-t)) context))
  66 (setf (deref (context-register-addr context index))
  67       new))
  68
  69 #!+linux
  70 ;;; For now.
  71 (defun context-floating-point-modes (context)
  72   (warn "stub CONTEXT-FLOATING-POINT-MODES")
  73   0)
  74
  75 ;;;; Internal-error-arguments.
  76
  77 ;;; INTERNAL-ERROR-ARGUMENTS -- interface.
  78 ;;;
  79 ;;; Given the sigcontext, extract the internal error arguments from the
  80 ;;; instruction stream.
  81 ;;;
  82 (defun internal-error-args (context)
  83   (declare (type (alien (* os-context-t)) context))
  84   (let ((pc (context-pc context)))
  85     (declare (type system-area-pointer pc))
  86     (let* ((length (sap-ref-8 pc 4))
  87            (vector (make-array length :element-type '(unsigned-byte 8))))
  88       (declare (type (unsigned-byte 8) length)
  89                (type (simple-array (unsigned-byte 8) (*)) vector))
  90       (copy-ub8-from-system-area pc 5 vector 0 length)
  91       (let* ((index 0)
  92              (error-number (sb!c:read-var-integer vector index)))
  93         (collect ((sc-offsets))
  94          (loop
  95           (when (>= index length)
  96             (return))
  97           (sc-offsets (sb!c:read-var-integer vector index)))
  98          (values error-number (sc-offsets)))))))