src/compiler/alpha/debug.lisp

   1 ;;;; Alpha compiler support for the new whizzy debugger
   2
   3 ;;;; This software is part of the SBCL system. See the README file for
   4 ;;;; more information.
   5 ;;;;
   6 ;;;; This software is derived from the CMU CL system, which was
   7 ;;;; written at Carnegie Mellon University and released into the
   8 ;;;; public domain. The software is in the public domain and is
   9 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
  10 ;;;; files for more information.
  11
  12 (in-package "SB!VM")
  13
  14 (define-vop (debug-cur-sp)
  15   (:translate current-sp)
  16   (:policy :fast-safe)
  17   (:results (res :scs (sap-reg)))
  18   (:result-types system-area-pointer)
  19   (:generator 1
  20     (move csp-tn res)))
  21
  22 (define-vop (debug-cur-fp)
  23   (:translate current-fp)
  24   (:policy :fast-safe)
  25   (:results (res :scs (sap-reg)))
  26   (:result-types system-area-pointer)
  27   (:generator 1
  28     (move cfp-tn res)))
  29
  30 (define-vop (read-control-stack)
  31   (:translate stack-ref)
  32   (:policy :fast-safe)
  33   (:args (object :scs (sap-reg) :target sap)
  34          (offset :scs (any-reg)))
  35   (:arg-types system-area-pointer positive-fixnum)
  36   (:temporary (:scs (sap-reg) :from :eval) sap)
  37   (:results (result :scs (descriptor-reg)))
  38   (:result-types *)
  39   (:generator 5
  40     (inst addq object offset sap)
  41     (inst ldl result 0 sap)))
  42
  43 (define-vop (read-control-stack-c)
  44   (:translate stack-ref)
  45   (:policy :fast-safe)
  46   (:args (object :scs (sap-reg)))
  47   (:info offset)
  48   (:arg-types system-area-pointer (:constant (signed-byte 14)))
  49   (:results (result :scs (descriptor-reg)))
  50   (:result-types *)
  51   (:generator 4
  52     (inst ldl result (* offset n-word-bytes) object)))
  53
  54 (define-vop (write-control-stack)
  55   (:translate %set-stack-ref)
  56   (:policy :fast-safe)
  57   (:args (object :scs (sap-reg) :target sap)
  58          (offset :scs (any-reg))
  59          (value :scs (descriptor-reg) :target result))
  60   (:arg-types system-area-pointer positive-fixnum *)
  61   (:results (result :scs (descriptor-reg)))
  62   (:result-types *)
  63   (:temporary (:scs (sap-reg) :from (:argument 1)) sap)
  64   (:generator 2
  65     (inst addq object offset sap)
  66     (inst stl value 0 sap)
  67     (move value result)))
  68
  69 (define-vop (write-control-stack-c)
  70   (:translate %set-stack-ref)
  71   (:policy :fast-safe)
  72   (:args (sap :scs (sap-reg))
  73          (value :scs (descriptor-reg) :target result))
  74   (:info offset)
  75   (:arg-types system-area-pointer (:constant (signed-byte 14)) *)
  76   (:results (result :scs (descriptor-reg)))
  77   (:result-types *)
  78   (:generator 1
  79     (inst stl value (* offset n-word-bytes) sap)
  80     (move value result)))
  81
  82
  83 (define-vop (code-from-mumble)
  84   (:policy :fast-safe)
  85   (:args (thing :scs (descriptor-reg)))
  86   (:results (code :scs (descriptor-reg)))
  87   (:temporary (:scs (non-descriptor-reg)) temp)
  88   (:variant-vars lowtag)
  89   (:generator 5
  90     (let ((bogus (gen-label))
  91           (done (gen-label)))
  92       (loadw temp thing 0 lowtag)
  93       (inst srl temp n-widetag-bits temp)
  94       (inst beq temp bogus)
  95       (inst sll temp (1- (integer-length n-word-bytes)) temp)
  96       (unless (= lowtag other-pointer-lowtag)
  97         (inst subq temp (- other-pointer-lowtag lowtag) temp))
  98       (inst subq thing temp code)
  99       (emit-label done)
 100       (assemble (*elsewhere*)
 101         (emit-label bogus)
 102         (move null-tn code)
 103         (inst br zero-tn done)))))
 104
 105 (define-vop (code-from-lra code-from-mumble)
 106   (:translate lra-code-header)
 107   (:variant other-pointer-lowtag))
 108
 109 (define-vop (code-from-function code-from-mumble)
 110   (:translate fun-code-header)
 111   (:variant fun-pointer-lowtag))
 112
 113 (define-vop (%make-lisp-obj)
 114   (:policy :fast-safe)
 115   (:translate %make-lisp-obj)
 116   (:args (value :scs (unsigned-reg) :target result))
 117   (:arg-types unsigned-num)
 118   (:results (result :scs (descriptor-reg)))
 119   (:generator 1
 120     (move value result)))
 121
 122 (define-vop (get-lisp-obj-address)
 123   (:policy :fast-safe)
 124   (:translate get-lisp-obj-address)
 125   (:args (thing :scs (descriptor-reg) :target result))
 126   (:results (result :scs (unsigned-reg)))
 127   (:result-types unsigned-num)
 128   (:generator 1
 129     (move thing result)))
 130
 131 (define-vop (fun-word-offset)
 132   (:policy :fast-safe)
 133   (:translate fun-word-offset)
 134   (:args (fun :scs (descriptor-reg)))
 135   (:results (res :scs (unsigned-reg)))
 136   (:result-types positive-fixnum)
 137   (:generator 5
 138     (loadw res fun 0 fun-pointer-lowtag)
 139     (inst srl res n-widetag-bits res)))
 140
 141 (defknown make-number-stack-pointer ((unsigned-byte 32)) system-area-pointer
 142   (movable foldable flushable))
 143
 144 (define-vop (make-number-stack-pointer)
 145   (:policy :fast-safe)
 146   (:translate make-number-stack-pointer)
 147   (:args (arg :scs (unsigned-reg) :to (:argument 1)))
 148   (:arg-types unsigned-num)
 149   (:results (res :scs (sap-reg) :from (:argument 0)))
 150   (:result-types system-area-pointer)
 151   (:generator 5
 152     (inst mskll nsp-tn 0 res)
 153     (inst bis res arg res)))