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 ;FIX-lav: unify code with genesis.lisp fixup
  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 (mask-field (byte 18 14) value)
  27                       (if (< value 0)
  28                         (1+ (ash (ldb (byte 13 0) value) 1))
  29                         (ash (ldb (byte 13 0) value) 1))))
  30              (:load11u
  31               (logior (if (< value 0)
  32                           (1+ (ash (ldb (byte 10 0) value) 1))
  33                           (ash (ldb (byte 11 0) value) 1))
  34                       (mask-field (byte 18 14) inst)))
  35              (:load-short
  36               (let ((low-bits (ldb (byte 11 0) value)))
  37                 (aver (<= 0 low-bits (1- (ash 1 4))))
  38                 (logior (ash (dpb (ldb (byte 4 0) value)
  39                                   (byte 4 1)
  40                                   (ldb (byte 1 4) value)) 17)
  41                         (logand inst #xffe0ffff))))
  42              (:hi
  43               (logior (ash (ldb (byte 5 13) value) 16)
  44                       (ash (ldb (byte 2 18) value) 14)
  45                       (ash (ldb (byte 2 11) value) 12)
  46                       (ash (ldb (byte 11 20) value) 1)
  47                       (ldb (byte 1 31) value)
  48                       (logand inst #xffe00000)))
  49              (:branch
  50               (let ((bits (ldb (byte 9 2) value)))
  51                 (aver (zerop (ldb (byte 2 0) value)))
  52                 (logior (ash bits 3)
  53                         (mask-field (byte 1 1) inst)
  54                         (mask-field (byte 3 13) inst)
  55                         (mask-field (byte 11 21) inst)))))))))
  56 \f
  57 (define-alien-routine ("os_context_pc_addr" context-pc-addr) (* unsigned-int)
  58   (context (* os-context-t)))
  59
  60 (defun context-pc (context)
  61   (declare (type (alien (* os-context-t)) context))
  62   (int-sap (logandc2 (deref (context-pc-addr context)) 3)))
  63
  64 (define-alien-routine ("os_context_register_addr" context-register-addr)
  65   (* unsigned-int)
  66   (context (* os-context-t))
  67   (index int))
  68
  69 ;;; FIXME: Should this and CONTEXT-PC be INLINE to reduce consing?
  70 ;;; (Are they used in anything time-critical, or just the debugger?)
  71 (defun context-register (context index)
  72   (declare (type (alien (* os-context-t)) context))
  73   (deref (context-register-addr context index)))
  74
  75 (defun %set-context-register (context index new)
  76 (declare (type (alien (* os-context-t)) context))
  77 (setf (deref (context-register-addr context index))
  78       new))
  79
  80 #!+linux
  81 ;;; For now.
  82 (defun context-floating-point-modes (context)
  83   (warn "stub CONTEXT-FLOATING-POINT-MODES")
  84   0)
  85
  86 ;;;; Internal-error-arguments.
  87
  88 ;;; INTERNAL-ERROR-ARGUMENTS -- interface.
  89 ;;;
  90 ;;; Given the sigcontext, extract the internal error arguments from the
  91 ;;; instruction stream.
  92 ;;;
  93 (defun internal-error-args (context)
  94   (declare (type (alien (* os-context-t)) context))
  95   (let ((pc (context-pc context)))
  96     (declare (type system-area-pointer pc))
  97     (let* ((length (sap-ref-8 pc 4))
  98            (vector (make-array length :element-type '(unsigned-byte 8))))
  99       (declare (type (unsigned-byte 8) length)
 100                (type (simple-array (unsigned-byte 8) (*)) vector))
 101       (copy-ub8-from-system-area pc 5 vector 0 length)
 102       (let* ((index 0)
 103              (error-number (sb!c:read-var-integer vector index)))
 104         (collect ((sc-offsets))
 105          (loop
 106           (when (>= index length)
 107             (return))
 108           (sc-offsets (sb!c:read-var-integer vector index)))
 109          (values error-number (sc-offsets)))))))