;;; Return a wired TN describing the N'th full call argument passing
;;; location.
-(!def-vm-support-routine standard-argument-location (n)
+(defun standard-arg-location (n)
(declare (type unsigned-byte n))
(if (< n register-arg-count)
(make-wired-tn *backend-t-primitive-type* descriptor-reg-sc-number
- (nth n *register-arg-offsets*))
+ (nth n *register-arg-offsets*))
(make-wired-tn *backend-t-primitive-type* control-stack-sc-number n)))
;;; Make a passing location TN for a local call return PC.
;;;
;;; Always wire the return PC location to the stack in its standard
;;; location.
-;;;
-;;; No problems.
-;#+nil
-(!def-vm-support-routine make-return-pc-passing-location (standard)
+(defun make-return-pc-passing-location (standard)
(declare (ignore standard))
(make-wired-tn (primitive-type-or-lose 'system-area-pointer)
- sap-stack-sc-number return-pc-save-offset))
-;;; If STANDARD is true, then use the standard (full call) location,
-;;; otherwise use any legal location.
-;;;
-;;; No problems.
-#+nil
-(!def-vm-support-routine make-return-pc-passing-location (standard)
- (let ((ptype (primitive-type-or-lose 'system-area-pointer)))
- (if standard
- (make-wired-tn ptype sap-stack-sc-number return-pc-save-offset)
- (make-normal-tn ptype))))
-
-;;; Similar to Make-Return-PC-Passing-Location, but makes a location to pass
-;;; Old-FP in.
-;;;
-;;; This is wired in both the standard and the local-call
-;;; conventions, because we want to be able to assume it's always there.
-;;; Besides, the x86 doesn't have enough registers to really make it
-;;; profitable to pass it in a register.
+ sap-stack-sc-number return-pc-save-offset))
+
+;;; This is similar to MAKE-RETURN-PC-PASSING-LOCATION, but makes a
+;;; location to pass OLD-FP in.
;;;
-;;; No problems
-;#+nil
-(!def-vm-support-routine make-old-fp-passing-location (standard)
+;;; This is wired in both the standard and the local-call conventions,
+;;; because we want to be able to assume it's always there. Besides,
+;;; the x86 doesn't have enough registers to really make it profitable
+;;; to pass it in a register.
+(defun make-old-fp-passing-location (standard)
(declare (ignore standard))
(make-wired-tn *fixnum-primitive-type* control-stack-sc-number
- ocfp-save-offset))
-;;; If standard is true, then use the standard (full call) location,
-;;; otherwise use any legal location.
-;;;
-;;; No problems.
-#+nil
-(!def-vm-support-routine make-old-fp-passing-location (standard)
- (if standard
- (make-wired-tn *fixnum-primitive-type* control-stack-sc-number
- ocfp-save-offset)
- (make-normal-tn *fixnum-primitive-type*)))
-
-;;; Make the TNs used to hold Old-FP and Return-PC within the current
+ ocfp-save-offset))
+
+;;; Make the TNs used to hold OLD-FP and RETURN-PC within the current
;;; function. We treat these specially so that the debugger can find
;;; them at a known location.
;;;
;;; Without using a save-tn - which does not make much sense if it is
-;;; wire to the stack? No problems.
-(!def-vm-support-routine make-old-fp-save-location (env)
+;;; wired to the stack?
+(defun make-old-fp-save-location (physenv)
(physenv-debug-live-tn (make-wired-tn *fixnum-primitive-type*
- control-stack-sc-number
- ocfp-save-offset)
- env))
-;;; Using a save-tn. No problems.
-#+nil
-(!def-vm-support-routine make-old-fp-save-location (env)
- (specify-save-tn
- (physenv-debug-live-tn (make-normal-tn *fixnum-primitive-type*) env)
- (make-wired-tn *fixnum-primitive-type* control-stack-sc-number
- ocfp-save-offset)))
-
-;;; Without using a save-tn - which does not make much sense if it is
-;;; wire to the stack? No problems.
-(!def-vm-support-routine make-return-pc-save-location (env)
+ control-stack-sc-number
+ ocfp-save-offset)
+ physenv))
+(defun make-return-pc-save-location (physenv)
(physenv-debug-live-tn
(make-wired-tn (primitive-type-or-lose 'system-area-pointer)
- sap-stack-sc-number return-pc-save-offset)
- env))
-;;; Using a save-tn. No problems.
-#+nil
-(!def-vm-support-routine make-return-pc-save-location (env)
- (let ((ptype (primitive-type-or-lose 'system-area-pointer)))
- (specify-save-tn
- (physenv-debug-live-tn (make-normal-tn ptype) env)
- (make-wired-tn ptype sap-stack-sc-number return-pc-save-offset))))
+ sap-stack-sc-number return-pc-save-offset)
+ physenv))
;;; Make a TN for the standard argument count passing location. We only
;;; need to make the standard location, since a count is never passed when we
;;; are using non-standard conventions.
-(!def-vm-support-routine make-argument-count-location ()
+(defun make-arg-count-location ()
(make-wired-tn *fixnum-primitive-type* any-reg-sc-number ecx-offset))
-
;;; Make a TN to hold the number-stack frame pointer. This is allocated
;;; once per component, and is component-live.
-(!def-vm-support-routine make-nfp-tn ()
+(defun make-nfp-tn ()
(make-restricted-tn *fixnum-primitive-type* ignore-me-sc-number))
-(!def-vm-support-routine make-stack-pointer-tn ()
+(defun make-stack-pointer-tn ()
(make-normal-tn *fixnum-primitive-type*))
-(!def-vm-support-routine make-number-stack-pointer-tn ()
+(defun make-number-stack-pointer-tn ()
(make-restricted-tn *fixnum-primitive-type* ignore-me-sc-number))
;;; Return a list of TNs that can be used to represent an unknown-values
;;; continuation within a function.
-(!def-vm-support-routine make-unknown-values-locations ()
+(defun make-unknown-values-locations ()
(list (make-stack-pointer-tn)
- (make-normal-tn *fixnum-primitive-type*)))
+ (make-normal-tn *fixnum-primitive-type*)))
-
-;;; This function is called by the Entry-Analyze phase, allowing
-;;; VM-dependent initialization of the IR2-Component structure. We push
-;;; placeholder entries in the Constants to leave room for additional
-;;; noise in the code object header.
-;;;
-;;; For the x86 the first constant is a pointer to a list of fixups,
-;;; or nil if the code object has none.
-(!def-vm-support-routine select-component-format (component)
+;;; This function is called by the ENTRY-ANALYZE phase, allowing
+;;; VM-dependent initialization of the IR2-COMPONENT structure. We
+;;; push placeholder entries in the CONSTANTS to leave room for
+;;; additional noise in the code object header.
+(defun select-component-format (component)
(declare (type component component))
+ ;; The 1+ here is because for the x86 the first constant is a
+ ;; pointer to a list of fixups, or NIL if the code object has none.
+ ;; (If I understand correctly, the fixups are needed at GC copy
+ ;; time because the X86 code isn't relocatable.)
+ ;;
+ ;; KLUDGE: It'd be cleaner to have the fixups entry be a named
+ ;; element of the CODE (aka component) primitive object. However,
+ ;; it's currently a large, tricky, error-prone chore to change
+ ;; the layout of any primitive object, so for the foreseeable future
+ ;; we'll just live with this ugliness. -- WHN 2002-01-02
(dotimes (i (1+ code-constants-offset))
(vector-push-extend nil
- (ir2-component-constants (component-info component))))
+ (ir2-component-constants (component-info component))))
(values))
\f
;;;; frame hackery
-;;; Used for setting up the Old-FP in local call.
+;;; This is used for setting up the Old-FP in local call.
(define-vop (current-fp)
(:results (val :scs (any-reg control-stack)))
(:generator 1
(:generator 1
nil))
+;;; Accessing a slot from an earlier stack frame is definite hackery.
+(define-vop (ancestor-frame-ref)
+ (:args (frame-pointer :scs (descriptor-reg))
+ (variable-home-tn :load-if nil))
+ (:results (value :scs (descriptor-reg any-reg)))
+ (:policy :fast-safe)
+ (:generator 4
+ (aver (sc-is variable-home-tn control-stack))
+ (loadw value frame-pointer
+ (frame-word-offset (tn-offset variable-home-tn)))))
+(define-vop (ancestor-frame-set)
+ (:args (frame-pointer :scs (descriptor-reg))
+ (value :scs (descriptor-reg any-reg)))
+ (:results (variable-home-tn :load-if nil))
+ (:policy :fast-safe)
+ (:generator 4
+ (aver (sc-is variable-home-tn control-stack))
+ (storew value frame-pointer
+ (frame-word-offset (tn-offset variable-home-tn)))))
+
+(macrolet ((define-frame-op
+ (suffix sc stack-sc instruction
+ &optional (ea
+ `(make-ea :dword
+ :base frame-pointer
+ :disp (frame-byte-offset
+ (tn-offset variable-home-tn)))))
+ (let ((reffer (symbolicate 'ancestor-frame-ref '/ suffix))
+ (setter (symbolicate 'ancestor-frame-set '/ suffix)))
+ `(progn
+ (define-vop (,reffer ancestor-frame-ref)
+ (:results (value :scs (,sc)))
+ (:generator 4
+ (aver (sc-is variable-home-tn ,stack-sc))
+ (inst ,instruction value
+ ,ea)))
+ (define-vop (,setter ancestor-frame-set)
+ (:args (frame-pointer :scs (descriptor-reg))
+ (value :scs (,sc)))
+ (:generator 4
+ (aver (sc-is variable-home-tn ,stack-sc))
+ (inst ,instruction ,ea value))))))
+ (define-x87-frame-op
+ (suffix sc stack-sc (load set)
+ &optional (ea
+ `(make-ea :dword
+ :base frame-pointer
+ :disp (frame-byte-offset
+ (tn-offset variable-home-tn)))))
+ (let ((reffer (symbolicate 'ancestor-frame-ref '/ suffix))
+ (setter (symbolicate 'ancestor-frame-set '/ suffix)))
+ `(progn
+ (define-vop (,reffer ancestor-frame-ref)
+ (:results (value :scs (,sc)))
+ (:generator 4
+ (aver (sc-is variable-home-tn ,stack-sc))
+ ,(if (symbolp load)
+ `(with-empty-tn@fp-top (value)
+ (inst ,load ,ea))
+ load)))
+ (define-vop (,setter ancestor-frame-set)
+ (:args (frame-pointer :scs (descriptor-reg))
+ (value :scs (,sc)))
+ (:generator 4
+ (aver (sc-is variable-home-tn ,stack-sc))
+ ,(if (symbolp set)
+ `(with-tn@fp-top (value)
+ (inst ,set ,ea))
+ set)))))))
+ (define-frame-op signed-byte-32 signed-reg signed-stack mov)
+ (define-frame-op unsigned-byte-32 unsigned-reg unsigned-stack mov)
+ (define-frame-op system-area-pointer sap-reg sap-stack mov)
+
+ (define-x87-frame-op double-float double-reg double-stack
+ (fldd fstd) (make-ea :dword
+ :base frame-pointer
+ :disp (frame-byte-offset
+ (1+ (tn-offset variable-home-tn)))))
+ (define-x87-frame-op single-float single-reg single-stack
+ (fld fst))
+
+ (define-x87-frame-op complex-double-float complex-double-reg
+ complex-double-stack
+ ((let ((real (complex-double-reg-real-tn value))
+ (imag (complex-double-reg-imag-tn value)))
+ (with-empty-tn@fp-top (real)
+ (inst fldd (ea-for-cdf-real-stack variable-home-tn frame-pointer)))
+ (with-empty-tn@fp-top (imag)
+ (inst fldd (ea-for-cdf-imag-stack variable-home-tn frame-pointer))))
+ (let ((real (complex-double-reg-real-tn value))
+ (imag (complex-double-reg-imag-tn value)))
+ (with-tn@fp-top (real)
+ (inst fstd (ea-for-cdf-real-stack variable-home-tn frame-pointer)))
+ (with-tn@fp-top (imag)
+ (inst fstd (ea-for-cdf-imag-stack variable-home-tn frame-pointer))))))
+ (define-x87-frame-op complex-single-float complex-single-reg
+ complex-single-stack
+ ((let ((real (complex-single-reg-real-tn value))
+ (imag (complex-single-reg-imag-tn value)))
+ (with-empty-tn@fp-top (real)
+ (inst fld (ea-for-csf-real-stack variable-home-tn frame-pointer)))
+ (with-empty-tn@fp-top (imag)
+ (inst fld (ea-for-csf-imag-stack variable-home-tn frame-pointer))))
+ (let ((real (complex-single-reg-real-tn value))
+ (imag (complex-single-reg-imag-tn value)))
+ (with-tn@fp-top (real)
+ (inst fst (ea-for-csf-real-stack variable-home-tn frame-pointer)))
+ (with-tn@fp-top (imag)
+ (inst fst (ea-for-csf-imag-stack variable-home-tn frame-pointer)))))))
+
+(defun primitive-type-indirect-cell-type (ptype)
+ (declare (type primitive-type ptype))
+ (macrolet ((foo (&body data)
+ `(case (primitive-type-name ptype)
+ ,@(loop for (name stack-sc ref set) in data
+ collect
+ `(,name
+ (load-time-value
+ (list (primitive-type-or-lose ',name)
+ (sc-or-lose ',stack-sc)
+ (lambda (node block fp value res)
+ (sb!c::vop ,ref node block
+ fp value res))
+ (lambda (node block fp new-val value)
+ (sb!c::vop ,set node block
+ fp new-val value)))))))))
+ (foo (double-float double-stack
+ ancestor-frame-ref/double-float
+ ancestor-frame-set/double-float)
+ (single-float single-stack
+ ancestor-frame-ref/single-float
+ ancestor-frame-set/single-float)
+ (complex-double-float complex-double-stack
+ ancestor-frame-ref/complex-double-float
+ ancestor-frame-set/complex-double-float)
+ (complex-single-float complex-single-stack
+ ancestor-frame-ref/complex-single-float
+ ancestor-frame-set/complex-single-float)
+ (signed-byte-32 signed-stack
+ ancestor-frame-ref/signed-byte-32
+ ancestor-frame-set/signed-byte-32)
+ (unsigned-byte-32 unsigned-stack
+ ancestor-frame-ref/unsigned-byte-32
+ ancestor-frame-set/unsigned-byte-32)
+ (unsigned-byte-31 unsigned-stack
+ ancestor-frame-ref/unsigned-byte-32
+ ancestor-frame-set/unsigned-byte-32)
+ (system-area-pointer sap-stack
+ ancestor-frame-ref/system-area-pointer
+ ancestor-frame-set/system-area-pointer))))
(define-vop (xep-allocate-frame)
(:info start-lab copy-more-arg-follows)
(:vop-var vop)
(:generator 1
- ;; Make sure the function is aligned, and drop a label pointing to this
- ;; function header.
- (align lowtag-bits)
- (trace-table-entry trace-table-function-prologue)
+ (emit-alignment n-lowtag-bits)
+ (trace-table-entry trace-table-fun-prologue)
(emit-label start-lab)
;; Skip space for the function header.
(inst simple-fun-header-word)
- (dotimes (i (1- sb!vm:simple-fun-code-offset))
+ (dotimes (i (1- simple-fun-code-offset))
(inst dword 0))
;; The start of the actual code.
;; Save the return-pc.
- (popw ebp-tn (- (1+ return-pc-save-offset)))
+ (popw ebp-tn (frame-word-offset return-pc-save-offset))
;; If copy-more-arg follows it will allocate the correct stack
;; size. The stack is not allocated first here as this may expose
(unless copy-more-arg-follows
;; The args fit within the frame so just allocate the frame.
(inst lea esp-tn
- (make-ea :dword :base ebp-tn
- :disp (- (* sb!vm:word-bytes
- (max 3 (sb-allocated-size 'stack)))))))
+ (make-ea :dword :base ebp-tn
+ :disp (- (* n-word-bytes
+ (- (max 3 (sb-allocated-size 'stack))
+ sp->fp-offset))))))
(trace-table-entry trace-table-normal)))
;;; or a multiple-call-local. All it does is allocate stack space for the
;;; callee (who has the same size stack as us).
(define-vop (allocate-frame)
- (:results (res :scs (any-reg control-stack))
- (nfp))
+ (:results (res :scs (any-reg))
+ (nfp))
(:info callee)
(:ignore nfp callee)
(:generator 2
- (move res esp-tn)
- (inst sub esp-tn (* sb!vm:word-bytes (sb-allocated-size 'stack)))))
-
-;;; Allocate a partial frame for passing stack arguments in a full call. Nargs
-;;; is the number of arguments passed. We allocate at least 3 slots, because
-;;; the XEP noise is going to want to use them before it can extend the stack.
+ (inst lea res (make-ea :dword :base esp-tn
+ :disp (- (* sp->fp-offset n-word-bytes))))
+ (inst sub esp-tn (* n-word-bytes (sb-allocated-size 'stack)))))
+
+;;; Allocate a partial frame for passing stack arguments in a full
+;;; call. NARGS is the number of arguments passed. We allocate at
+;;; least 3 slots, because the XEP noise is going to want to use them
+;;; before it can extend the stack.
(define-vop (allocate-full-call-frame)
(:info nargs)
- (:results (res :scs (any-reg control-stack)))
+ (:results (res :scs (any-reg)))
(:generator 2
- (move res esp-tn)
- (inst sub esp-tn (* (max nargs 3) sb!vm:word-bytes))))
-
-
+ (inst lea res (make-ea :dword :base esp-tn
+ :disp (- (* sp->fp-offset n-word-bytes))))
+ (inst sub esp-tn (* (max nargs 3) n-word-bytes))))
\f
-;;; Emit code needed at the return-point from an unknown-values call for a
-;;; fixed number of values. Values is the head of the TN-Ref list for the
-;;; locations that the values are to be received into. Nvals is the number of
-;;; values that are to be received (should equal the length of Values).
-;;;
-;;; Move-Temp is a Descriptor-Reg TN used as a temporary.
-;;;
-;;; This code exploits the fact that in the unknown-values convention, a
-;;; single value return returns at the return PC + 2, whereas a return of other
-;;; than one value returns directly at the return PC.
+;;; Emit code needed at the return-point from an unknown-values call
+;;; for a fixed number of values. Values is the head of the TN-REF
+;;; list for the locations that the values are to be received into.
+;;; Nvals is the number of values that are to be received (should
+;;; equal the length of Values).
;;;
-;;; If 0 or 1 values are expected, then we just emit an instruction to reset
-;;; the SP (which will only be executed when other than 1 value is returned.)
+;;; If 0 or 1 values are expected, then we just emit an instruction to
+;;; reset the SP (which will only be executed when other than 1 value
+;;; is returned.)
;;;
;;; In the general case we have to do three things:
-;;; -- Default unsupplied register values. This need only be done when a
-;;; single value is returned, since register values are defaulted by the
-;;; called in the non-single case.
-;;; -- Default unsupplied stack values. This needs to be done whenever there
-;;; are stack values.
-;;; -- Reset SP. This must be done whenever other than 1 value is returned,
-;;; regardless of the number of values desired.
-(defun default-unknown-values (vop values nvals)
+;;; -- Default unsupplied register values. This need only be done
+;;; when a single value is returned, since register values are
+;;; defaulted by the called in the non-single case.
+;;; -- Default unsupplied stack values. This needs to be done whenever
+;;; there are stack values.
+;;; -- Reset SP. This must be done whenever other than 1 value is
+;;; returned, regardless of the number of values desired.
+(defun default-unknown-values (vop values nvals node)
(declare (type (or tn-ref null) values)
- (type unsigned-byte nvals))
- (cond
- ((<= nvals 1)
- (note-this-location vop :single-value-return)
- (inst mov esp-tn ebx-tn))
- ((<= nvals register-arg-count)
- (let ((regs-defaulted (gen-label)))
- (note-this-location vop :unknown-return)
- (inst jmp-short regs-defaulted)
- ;; Default the unsuppled registers.
- (let* ((2nd-tn-ref (tn-ref-across values))
- (2nd-tn (tn-ref-tn 2nd-tn-ref)))
- (inst mov 2nd-tn nil-value)
- (when (> nvals 2)
- (loop
- for tn-ref = (tn-ref-across 2nd-tn-ref)
- then (tn-ref-across tn-ref)
- for count from 2 below register-arg-count
- do (inst mov (tn-ref-tn tn-ref) 2nd-tn))))
- (inst mov ebx-tn esp-tn)
- (emit-label regs-defaulted)
- (inst mov esp-tn ebx-tn)))
- ((<= nvals 7)
- ;; Number of bytes depends on the relative jump instructions. Best
- ;; case is 31+(n-3)*14, worst case is 35+(n-3)*18. For nvals=6
- ;; that is 73/89 bytes, and for nvals=7 that is 87/107 bytes which
- ;; is likely better than using the blt below.
- (let ((regs-defaulted (gen-label))
- (defaulting-done (gen-label))
- (default-stack-slots (gen-label)))
- (note-this-location vop :unknown-return)
- ;; Branch off to the MV case.
- (inst jmp-short regs-defaulted)
- ;; Do the single value case.
- ;; Default the register args
- (inst mov eax-tn nil-value)
- (do ((i 1 (1+ i))
- (val (tn-ref-across values) (tn-ref-across val)))
- ((= i (min nvals register-arg-count)))
- (inst mov (tn-ref-tn val) eax-tn))
-
- ;; Fake other registers so it looks like we returned with all the
- ;; registers filled in.
- (move ebx-tn esp-tn)
- (inst push edx-tn)
- (inst jmp default-stack-slots)
-
- (emit-label regs-defaulted)
-
- (inst mov eax-tn nil-value)
- (storew edx-tn ebx-tn -1)
- (collect ((defaults))
- (do ((i register-arg-count (1+ i))
- (val (do ((i 0 (1+ i))
- (val values (tn-ref-across val)))
- ((= i register-arg-count) val))
- (tn-ref-across val)))
- ((null val))
- (let ((default-lab (gen-label))
- (tn (tn-ref-tn val)))
- (defaults (cons default-lab tn))
-
- (inst cmp ecx-tn (fixnumize i))
- (inst jmp :be default-lab)
- (loadw edx-tn ebx-tn (- (1+ i)))
- (inst mov tn edx-tn)))
-
- (emit-label defaulting-done)
- (loadw edx-tn ebx-tn -1)
- (move esp-tn ebx-tn)
-
- (let ((defaults (defaults)))
- (when defaults
- (assemble (*elsewhere*)
- (trace-table-entry trace-table-function-prologue)
- (emit-label default-stack-slots)
- (dolist (default defaults)
- (emit-label (car default))
- (inst mov (cdr default) eax-tn))
- (inst jmp defaulting-done)
- (trace-table-entry trace-table-normal)))))))
- (t
- ;; 91 bytes for this branch.
- (let ((regs-defaulted (gen-label))
- (restore-edi (gen-label))
- (no-stack-args (gen-label))
- (default-stack-vals (gen-label))
- (count-okay (gen-label)))
- (note-this-location vop :unknown-return)
- ;; Branch off to the MV case.
- (inst jmp-short regs-defaulted)
-
- ;; Default the register args, and set up the stack as if we entered
- ;; the MV return point.
- (inst mov ebx-tn esp-tn)
- (inst push edx-tn)
- (inst mov edi-tn nil-value)
- (inst push edi-tn)
- (inst mov esi-tn edi-tn)
- ;; Compute a pointer to where to put the [defaulted] stack values.
- (emit-label no-stack-args)
- (inst lea edi-tn
- (make-ea :dword :base ebp-tn
- :disp (* (- (1+ register-arg-count)) word-bytes)))
- ;; Load EAX with NIL so we can quickly store it, and set up stuff
- ;; for the loop.
- (inst mov eax-tn nil-value)
- (inst std)
- (inst mov ecx-tn (- nvals register-arg-count))
- ;; Jump into the default loop.
- (inst jmp default-stack-vals)
-
- ;; The regs are defaulted. We need to copy any stack arguments,
- ;; and then default the remaining stack arguments.
- (emit-label regs-defaulted)
- ;; Save EDI.
- (storew edi-tn ebx-tn (- (1+ 1)))
- ;; Compute the number of stack arguments, and if it's zero or less,
- ;; don't copy any stack arguments.
- (inst sub ecx-tn (fixnumize register-arg-count))
- (inst jmp :le no-stack-args)
-
- ;; Throw away any unwanted args.
- (inst cmp ecx-tn (fixnumize (- nvals register-arg-count)))
- (inst jmp :be count-okay)
- (inst mov ecx-tn (fixnumize (- nvals register-arg-count)))
- (emit-label count-okay)
- ;; Save the number of stack values.
- (inst mov eax-tn ecx-tn)
- ;; Compute a pointer to where the stack args go.
- (inst lea edi-tn
- (make-ea :dword :base ebp-tn
- :disp (* (- (1+ register-arg-count)) word-bytes)))
- ;; Save ESI, and compute a pointer to where the args come from.
- (storew esi-tn ebx-tn (- (1+ 2)))
- (inst lea esi-tn
- (make-ea :dword :base ebx-tn
- :disp (* (- (1+ register-arg-count)) word-bytes)))
- ;; Do the copy.
- (inst shr ecx-tn word-shift) ; make word count
- (inst std)
- (inst rep)
- (inst movs :dword)
- ;; Restore ESI.
- (loadw esi-tn ebx-tn (- (1+ 2)))
- ;; Now we have to default the remaining args. Find out how many.
- (inst sub eax-tn (fixnumize (- nvals register-arg-count)))
- (inst neg eax-tn)
- ;; If none, then just blow out of here.
- (inst jmp :le restore-edi)
- (inst mov ecx-tn eax-tn)
- (inst shr ecx-tn word-shift) ; word count
- ;; Load EAX with NIL for fast storing.
- (inst mov eax-tn nil-value)
- ;; Do the store.
- (emit-label default-stack-vals)
- (inst rep)
- (inst stos eax-tn)
- ;; Restore EDI, and reset the stack.
- (emit-label restore-edi)
- (loadw edi-tn ebx-tn (- (1+ 1)))
- (inst mov esp-tn ebx-tn))))
+ (type unsigned-byte nvals))
+ (let ((type (sb!c::basic-combination-derived-type node)))
+ (cond
+ ((<= nvals 1)
+ (note-this-location vop :single-value-return)
+ (cond
+ ((<= (sb!kernel:values-type-max-value-count type)
+ register-arg-count)
+ (when (and (named-type-p type)
+ (eq nil (named-type-name type)))
+ ;; The function never returns, it may happen that the code
+ ;; ends right here leavig the :SINGLE-VALUE-RETURN note
+ ;; dangling. Let's emit a NOP.
+ (inst nop)))
+ ((not (sb!kernel:values-type-may-be-single-value-p type))
+ (inst mov esp-tn ebx-tn))
+ ((member :cmov *backend-subfeatures*)
+ (inst cmov :c esp-tn ebx-tn))
+ (t
+ (let ((single-value (gen-label)))
+ (inst jmp :nc single-value)
+ (inst mov esp-tn ebx-tn)
+ (emit-label single-value)))))
+ ((<= nvals register-arg-count)
+ (note-this-location vop :unknown-return)
+ (when (sb!kernel:values-type-may-be-single-value-p type)
+ (let ((regs-defaulted (gen-label)))
+ (inst jmp :c regs-defaulted)
+ ;; Default the unsupplied registers.
+ (let* ((2nd-tn-ref (tn-ref-across values))
+ (2nd-tn (tn-ref-tn 2nd-tn-ref)))
+ (inst mov 2nd-tn nil-value)
+ (when (> nvals 2)
+ (loop
+ for tn-ref = (tn-ref-across 2nd-tn-ref)
+ then (tn-ref-across tn-ref)
+ for count from 2 below register-arg-count
+ do (inst mov (tn-ref-tn tn-ref) 2nd-tn))))
+ (inst mov ebx-tn esp-tn)
+ (emit-label regs-defaulted)))
+ (when (< register-arg-count
+ (sb!kernel:values-type-max-value-count type))
+ (inst mov esp-tn ebx-tn)))
+ ((<= nvals 7)
+ ;; The number of bytes depends on the relative jump instructions.
+ ;; Best case is 31+(n-3)*14, worst case is 35+(n-3)*18. For
+ ;; NVALS=6 that is 73/89 bytes, and for NVALS=7 that is 87/107
+ ;; bytes which is likely better than using the blt below.
+ (let ((regs-defaulted (gen-label))
+ (defaulting-done (gen-label))
+ (default-stack-slots (gen-label)))
+ (note-this-location vop :unknown-return)
+ ;; Branch off to the MV case.
+ (inst jmp :c regs-defaulted)
+ ;; Do the single value case.
+ ;; Default the register args
+ (inst mov eax-tn nil-value)
+ (do ((i 1 (1+ i))
+ (val (tn-ref-across values) (tn-ref-across val)))
+ ((= i (min nvals register-arg-count)))
+ (inst mov (tn-ref-tn val) eax-tn))
+ ;; Fake other registers so it looks like we returned with all the
+ ;; registers filled in.
+ (move ebx-tn esp-tn)
+ (inst jmp default-stack-slots)
+ (emit-label regs-defaulted)
+ (inst mov eax-tn nil-value)
+ (collect ((defaults))
+ (do ((i register-arg-count (1+ i))
+ (val (do ((i 0 (1+ i))
+ (val values (tn-ref-across val)))
+ ((= i register-arg-count) val))
+ (tn-ref-across val)))
+ ((null val))
+ (let ((default-lab (gen-label))
+ (tn (tn-ref-tn val))
+ (first-stack-arg-p (= i register-arg-count)))
+ (defaults (cons default-lab
+ (cons tn first-stack-arg-p)))
+ (inst cmp ecx-tn (fixnumize i))
+ (inst jmp :be default-lab)
+ (when first-stack-arg-p
+ ;; There are stack args so the frame of the callee is
+ ;; still there, save EDX in its first slot temporalily.
+ (storew edx-tn ebx-tn (frame-word-offset sp->fp-offset)))
+ (loadw edx-tn ebx-tn (frame-word-offset (+ sp->fp-offset i)))
+ (inst mov tn edx-tn)))
+ (emit-label defaulting-done)
+ (loadw edx-tn ebx-tn (frame-word-offset sp->fp-offset))
+ (move esp-tn ebx-tn)
+ (let ((defaults (defaults)))
+ (when defaults
+ (assemble (*elsewhere*)
+ (trace-table-entry trace-table-fun-prologue)
+ (emit-label default-stack-slots)
+ (dolist (default defaults)
+ (emit-label (car default))
+ (when (cddr default)
+ ;; We are setting the first stack argument to NIL.
+ ;; The callee's stack frame is dead, save EDX by
+ ;; pushing it to the stack, it will end up at same
+ ;; place as in the (STOREW EDX-TN EBX-TN -1) case
+ ;; above.
+ (inst push edx-tn))
+ (inst mov (second default) eax-tn))
+ (inst jmp defaulting-done)
+ (trace-table-entry trace-table-normal)))))))
+ (t
+ ;; 91 bytes for this branch.
+ (let ((regs-defaulted (gen-label))
+ (restore-edi (gen-label))
+ (no-stack-args (gen-label))
+ (default-stack-vals (gen-label))
+ (count-okay (gen-label)))
+ (note-this-location vop :unknown-return)
+ ;; Branch off to the MV case.
+ (inst jmp :c regs-defaulted)
+ ;; Default the register args, and set up the stack as if we
+ ;; entered the MV return point.
+ (inst mov ebx-tn esp-tn)
+ (inst mov edi-tn nil-value)
+ (inst mov esi-tn edi-tn)
+ ;; Compute a pointer to where to put the [defaulted] stack values.
+ (emit-label no-stack-args)
+ (inst push edx-tn)
+ (inst push edi-tn)
+ (inst lea edi-tn
+ (make-ea :dword :base ebp-tn
+ :disp (frame-byte-offset register-arg-count)))
+ ;; Load EAX with NIL so we can quickly store it, and set up
+ ;; stuff for the loop.
+ (inst mov eax-tn nil-value)
+ (inst std)
+ (inst mov ecx-tn (- nvals register-arg-count))
+ ;; Jump into the default loop.
+ (inst jmp default-stack-vals)
+ ;; The regs are defaulted. We need to copy any stack arguments,
+ ;; and then default the remaining stack arguments.
+ (emit-label regs-defaulted)
+ ;; Compute the number of stack arguments, and if it's zero or
+ ;; less, don't copy any stack arguments.
+ (inst sub ecx-tn (fixnumize register-arg-count))
+ (inst jmp :le no-stack-args)
+ ;; Save EDI.
+ (storew edi-tn ebx-tn (frame-word-offset (+ sp->fp-offset 1)))
+ ;; Throw away any unwanted args.
+ (inst cmp ecx-tn (fixnumize (- nvals register-arg-count)))
+ (inst jmp :be count-okay)
+ (inst mov ecx-tn (fixnumize (- nvals register-arg-count)))
+ (emit-label count-okay)
+ ;; Save the number of stack values.
+ (inst mov eax-tn ecx-tn)
+ ;; Compute a pointer to where the stack args go.
+ (inst lea edi-tn
+ (make-ea :dword :base ebp-tn
+ :disp (frame-byte-offset register-arg-count)))
+ ;; Save ESI, and compute a pointer to where the args come from.
+ (storew esi-tn ebx-tn (frame-word-offset (+ sp->fp-offset 2)))
+ (inst lea esi-tn
+ (make-ea :dword :base ebx-tn
+ :disp (frame-byte-offset
+ (+ sp->fp-offset register-arg-count))))
+ ;; Do the copy.
+ (inst shr ecx-tn word-shift) ; make word count
+ (inst std)
+ (inst rep)
+ (inst movs :dword)
+ ;; Restore ESI.
+ (loadw esi-tn ebx-tn (frame-word-offset (+ sp->fp-offset 2)))
+ ;; Now we have to default the remaining args. Find out how many.
+ (inst sub eax-tn (fixnumize (- nvals register-arg-count)))
+ (inst neg eax-tn)
+ ;; If none, then just blow out of here.
+ (inst jmp :le restore-edi)
+ (inst mov ecx-tn eax-tn)
+ (inst shr ecx-tn word-shift) ; word count
+ ;; Load EAX with NIL for fast storing.
+ (inst mov eax-tn nil-value)
+ ;; Do the store.
+ (emit-label default-stack-vals)
+ (inst rep)
+ (inst stos eax-tn)
+ ;; Restore EDI, and reset the stack.
+ (emit-label restore-edi)
+ (loadw edi-tn ebx-tn (frame-word-offset (+ sp->fp-offset 1)))
+ (inst mov esp-tn ebx-tn)
+ (inst cld)))))
(values))
\f
;;;; unknown values receiving
-;;; Emit code needed at the return point for an unknown-values call for an
-;;; arbitrary number of values.
+;;; Emit code needed at the return point for an unknown-values call
+;;; for an arbitrary number of values.
;;;
-;;; We do the single and non-single cases with no shared code: there doesn't
-;;; seem to be any potential overlap, and receiving a single value is more
-;;; important efficiency-wise.
+;;; We do the single and non-single cases with no shared code: there
+;;; doesn't seem to be any potential overlap, and receiving a single
+;;; value is more important efficiency-wise.
;;;
-;;; When there is a single value, we just push it on the stack, returning
-;;; the old SP and 1.
+;;; When there is a single value, we just push it on the stack,
+;;; returning the old SP and 1.
;;;
-;;; When there is a variable number of values, we move all of the argument
-;;; registers onto the stack, and return Args and Nargs.
+;;; When there is a variable number of values, we move all of the
+;;; argument registers onto the stack, and return ARGS and NARGS.
;;;
-;;; Args and Nargs are TNs wired to the named locations. We must
-;;; explicitly allocate these TNs, since their lifetimes overlap with the
-;;; results Start and Count (also, it's nice to be able to target them).
-(defun receive-unknown-values (args nargs start count)
+;;; ARGS and NARGS are TNs wired to the named locations. We must
+;;; explicitly allocate these TNs, since their lifetimes overlap with
+;;; the results start and count. (Also, it's nice to be able to target
+;;; them.)
+(defun receive-unknown-values (args nargs start count node)
(declare (type tn args nargs start count))
- (let ((variable-values (gen-label))
- (done (gen-label)))
- (inst jmp-short variable-values)
-
- (inst mov start esp-tn)
- (inst push (first *register-arg-tns*))
- (inst mov count (fixnumize 1))
- (inst jmp done)
-
- (emit-label variable-values)
+ (let ((type (sb!c::basic-combination-derived-type node))
+ (variable-values (gen-label))
+ (stack-values (gen-label))
+ (done (gen-label)))
+ (when (sb!kernel:values-type-may-be-single-value-p type)
+ (inst jmp :c variable-values)
+ (cond ((location= start (first *register-arg-tns*))
+ (inst push (first *register-arg-tns*))
+ (inst lea start (make-ea :dword :base esp-tn :disp n-word-bytes)))
+ (t (inst mov start esp-tn)
+ (inst push (first *register-arg-tns*))))
+ (inst mov count (fixnumize 1))
+ (inst jmp done)
+ (emit-label variable-values))
+ ;; The stack frame is burnt and RETurned from if there are no
+ ;; stack values. In this case quickly reallocate sufficient space.
+ (when (<= (sb!kernel:values-type-min-value-count type)
+ register-arg-count)
+ (inst cmp nargs (fixnumize register-arg-count))
+ (inst jmp :g stack-values)
+ (inst sub esp-tn nargs)
+ (emit-label stack-values))
;; dtc: this writes the registers onto the stack even if they are
;; not needed, only the number specified in ecx are used and have
;; stack allocated to them. No harm is done.
(loop
for arg in *register-arg-tns*
for i downfrom -1
+ for j below (sb!kernel:values-type-max-value-count type)
do (storew arg args i))
(move start args)
(move count nargs)
;;; handles is allocation of the result temporaries.
(define-vop (unknown-values-receiver)
(:temporary (:sc descriptor-reg :offset ebx-offset
- :from :eval :to (:result 0))
- values-start)
+ :from :eval :to (:result 0))
+ values-start)
(:temporary (:sc any-reg :offset ecx-offset
- :from :eval :to (:result 1))
- nvals)
+ :from :eval :to (:result 1))
+ nvals)
(:results (start :scs (any-reg control-stack))
- (count :scs (any-reg control-stack))))
+ (count :scs (any-reg control-stack))))
\f
;;;; local call with unknown values convention return
-;;; Non-TR local call for a fixed number of values passed according to the
-;;; unknown values convention.
+(defun check-ocfp-and-return-pc (old-fp return-pc)
+ #+nil
+ (format t "*known-return: old-fp ~S, tn-kind ~S; ~S ~S~%"
+ old-fp (sb!c::tn-kind old-fp) (sb!c::tn-save-tn old-fp)
+ (sb!c::tn-kind (sb!c::tn-save-tn old-fp)))
+ #+nil
+ (format t "*known-return: return-pc ~S, tn-kind ~S; ~S ~S~%"
+ return-pc (sb!c::tn-kind return-pc)
+ (sb!c::tn-save-tn return-pc)
+ (sb!c::tn-kind (sb!c::tn-save-tn return-pc)))
+ (unless (and (sc-is old-fp control-stack)
+ (= (tn-offset old-fp) ocfp-save-offset))
+ (error "ocfp not on stack in standard save location?"))
+ (unless (and (sc-is return-pc sap-stack)
+ (= (tn-offset return-pc) return-pc-save-offset))
+ (error "return-pc not on stack in standard save location?")))
+
+;;; The local call convention doesn't fit that well with x86-style
+;;; calls. Emit a header for local calls to pop the return address
+;;; in the right place.
+(defun emit-block-header (start-label trampoline-label fall-thru-p alignp)
+ (declare (ignore alignp))
+ (when trampoline-label
+ (when fall-thru-p
+ (inst jmp start-label))
+ (emit-label trampoline-label)
+ (popw ebp-tn (frame-word-offset return-pc-save-offset)))
+ (emit-label start-label))
+
+;;; Non-TR local call for a fixed number of values passed according to
+;;; the unknown values convention.
;;;
;;; FP is the frame pointer in install before doing the call.
;;;
-;;; NFP would be the number-stack frame pointer if we had a separate number
-;;; stack.
+;;; NFP would be the number-stack frame pointer if we had a separate
+;;; number stack.
;;;
-;;; Args are the argument passing locations, which are specified only to
-;;; terminate their lifetimes in the caller.
+;;; Args are the argument passing locations, which are specified only
+;;; to terminate their lifetimes in the caller.
;;;
-;;; Values are the return value locations (wired to the standard passing
-;;; locations).
-;;; Nvals is the number of values received.
+;;; VALUES are the return value locations (wired to the standard
+;;; passing locations). NVALS is the number of values received.
;;;
-;;; Save is the save info, which we can ignore since saving has been done.
+;;; Save is the save info, which we can ignore since saving has been
+;;; done.
;;;
-;;; Target is a continuation pointing to the start of the called function.
+;;; TARGET is a continuation pointing to the start of the called
+;;; function.
(define-vop (call-local)
(:args (fp)
- (nfp)
- (args :more t))
+ (nfp)
+ (args :more t))
(:results (values :more t))
(:save-p t)
(:move-args :local-call)
(:info arg-locs callee target nvals)
(:vop-var vop)
- (:ignore nfp arg-locs args #+nil callee)
+ (:ignore nfp arg-locs args callee)
+ (:node-var node)
(:generator 5
(trace-table-entry trace-table-call-site)
(move ebp-tn fp)
-
- (let ((ret-tn (callee-return-pc-tn callee)))
- #+nil
- (format t "*call-local ~S; tn-kind ~S; tn-save-tn ~S; its tn-kind ~S~%"
- ret-tn (sb!c::tn-kind ret-tn) (sb!c::tn-save-tn ret-tn)
- (sb!c::tn-kind (sb!c::tn-save-tn ret-tn)))
-
- ;; Is the return-pc on the stack or in a register?
- (sc-case ret-tn
- ((sap-stack)
- #+nil (format t "*call-local: ret-tn on stack; offset=~S~%"
- (tn-offset ret-tn))
- (storew (make-fixup nil :code-object return)
- ebp-tn (- (1+ (tn-offset ret-tn)))))
- ((sap-reg)
- (inst lea ret-tn (make-fixup nil :code-object return)))))
-
(note-this-location vop :call-site)
- (inst jmp target)
- RETURN
- (default-unknown-values vop values nvals)
+ (inst call target)
+ (default-unknown-values vop values nvals node)
(trace-table-entry trace-table-normal)))
;;; Non-TR local call for a variable number of return values passed according
;;; glob and the number of values received.
(define-vop (multiple-call-local unknown-values-receiver)
(:args (fp)
- (nfp)
- (args :more t))
+ (nfp)
+ (args :more t))
(:save-p t)
(:move-args :local-call)
(:info save callee target)
- (:ignore args save nfp #+nil callee)
+ (:ignore args save nfp callee)
(:vop-var vop)
+ (:node-var node)
(:generator 20
(trace-table-entry trace-table-call-site)
(move ebp-tn fp)
-
- (let ((ret-tn (callee-return-pc-tn callee)))
- #+nil
- (format t "*multiple-call-local ~S; tn-kind ~S; tn-save-tn ~S; its tn-kind ~S~%"
- ret-tn (sb!c::tn-kind ret-tn) (sb!c::tn-save-tn ret-tn)
- (sb!c::tn-kind (sb!c::tn-save-tn ret-tn)))
-
- ;; Is the return-pc on the stack or in a register?
- (sc-case ret-tn
- ((sap-stack)
- #+nil (format t "*multiple-call-local: ret-tn on stack; offset=~S~%"
- (tn-offset ret-tn))
- ;; Stack
- (storew (make-fixup nil :code-object return)
- ebp-tn (- (1+ (tn-offset ret-tn)))))
- ((sap-reg)
- ;; Register
- (inst lea ret-tn (make-fixup nil :code-object return)))))
-
(note-this-location vop :call-site)
- (inst jmp target)
- RETURN
+ (inst call target)
(note-this-location vop :unknown-return)
- (receive-unknown-values values-start nvals start count)
+ (receive-unknown-values values-start nvals start count node)
(trace-table-entry trace-table-normal)))
\f
;;;; local call with known values return
-;;; Non-TR local call with known return locations. Known-value return works
-;;; just like argument passing in local call.
+;;; Non-TR local call with known return locations. Known-value return
+;;; works just like argument passing in local call.
;;;
-;;; Note: we can't use normal load-tn allocation for the fixed args, since all
-;;; registers may be tied up by the more operand. Instead, we use
-;;; MAYBE-LOAD-STACK-TN.
+;;; Note: we can't use normal load-tn allocation for the fixed args,
+;;; since all registers may be tied up by the more operand. Instead,
+;;; we use MAYBE-LOAD-STACK-TN.
(define-vop (known-call-local)
(:args (fp)
- (nfp)
- (args :more t))
+ (nfp)
+ (args :more t))
(:results (res :more t))
(:move-args :local-call)
(:save-p t)
(:info save callee target)
- (:ignore args res save nfp #+nil callee)
+ (:ignore args res save nfp callee)
(:vop-var vop)
(:generator 5
(trace-table-entry trace-table-call-site)
(move ebp-tn fp)
-
- (let ((ret-tn (callee-return-pc-tn callee)))
-
- #+nil
- (format t "*known-call-local ~S; tn-kind ~S; tn-save-tn ~S; its tn-kind ~S~%"
- ret-tn (sb!c::tn-kind ret-tn) (sb!c::tn-save-tn ret-tn)
- (sb!c::tn-kind (sb!c::tn-save-tn ret-tn)))
-
- ;; Is the return-pc on the stack or in a register?
- (sc-case ret-tn
- ((sap-stack)
- #+nil (format t "*known-call-local: ret-tn on stack; offset=~S~%"
- (tn-offset ret-tn))
- ;; Stack
- (storew (make-fixup nil :code-object return)
- ebp-tn (- (1+ (tn-offset ret-tn)))))
- ((sap-reg)
- ;; Register
- (inst lea ret-tn (make-fixup nil :code-object return)))))
-
(note-this-location vop :call-site)
- (inst jmp target)
- RETURN
+ (inst call target)
(note-this-location vop :known-return)
(trace-table-entry trace-table-normal)))
\f
-;;; Return from known values call. We receive the return locations as
-;;; arguments to terminate their lifetimes in the returning function. We
-;;; restore FP and CSP and jump to the Return-PC.
-;;;
-;;; We can assume we know exactly where old-fp and return-pc are because
-;;; make-old-fp-save-location and make-return-pc-save-location always
-;;; return the same place.
-#+nil
-(define-vop (known-return)
- (:args (old-fp)
- (return-pc :scs (any-reg immediate-stack) :target rpc)
- (vals :more t))
- (:move-args :known-return)
- (:info val-locs)
- (:temporary (:sc unsigned-reg :from (:argument 1)) rpc)
- (:ignore val-locs vals)
- (:vop-var vop)
- (:generator 6
- (trace-table-entry trace-table-function-epilogue)
- ;; Save the return-pc in a register 'cause the frame-pointer is going away.
- ;; Note this not in the usual stack location so we can't use RET
- (move rpc return-pc)
- ;; Restore the stack.
- (move esp-tn ebp-tn)
- ;; Restore the old fp. We know OLD-FP is going to be in its stack
- ;; save slot, which is a different frame that than this one,
- ;; so we don't have to worry about having just cleared
- ;; most of the stack.
- (move ebp-tn old-fp)
- (inst jmp rpc)
- (trace-table-entry trace-table-normal)))
-\f
;;; From Douglas Crosher
;;; Return from known values call. We receive the return locations as
;;; arguments to terminate their lifetimes in the returning function. We
;;; restore FP and CSP and jump to the Return-PC.
-;;;
-;;; The old-fp may be either in a register or on the stack in its
-;;; standard save locations - slot 0.
-;;;
-;;; The return-pc may be in a register or on the stack in any slot.
(define-vop (known-return)
(:args (old-fp)
- (return-pc)
- (vals :more t))
+ (return-pc)
+ (vals :more t))
(:move-args :known-return)
(:info val-locs)
(:ignore val-locs vals)
(:vop-var vop)
(:generator 6
- (trace-table-entry trace-table-function-epilogue)
-
- #+nil (format t "*known-return: old-fp ~S, tn-kind ~S; ~S ~S~%"
- old-fp (sb!c::tn-kind old-fp) (sb!c::tn-save-tn old-fp)
- (sb!c::tn-kind (sb!c::tn-save-tn old-fp)))
-
- #+nil (format t "*known-return: return-pc ~S, tn-kind ~S; ~S ~S~%"
- return-pc (sb!c::tn-kind return-pc) (sb!c::tn-save-tn return-pc)
- (sb!c::tn-kind (sb!c::tn-save-tn return-pc)))
-
- ;; return-pc may be either in a register or on the stack.
- (sc-case return-pc
- ((sap-reg)
- (sc-case old-fp
- ((control-stack)
-
- #+nil (format t "*known-return: old-fp ~S on stack; offset=~S~%"
- old-fp (tn-offset old-fp))
-
- (cond ((zerop (tn-offset old-fp))
- ;; Zot all of the stack except for the old-fp.
- (inst lea esp-tn (make-ea :dword :base ebp-tn
- :disp (- (* (1+ ocfp-save-offset)
- word-bytes))))
- ;; Restore the old fp from its save location on the stack,
- ;; and zot the stack.
- (inst pop ebp-tn))
-
- (t
- (cerror "Continue any-way"
- "VOP return-local doesn't work if old-fp (in slot %s) is not in slot 0"
- (tn-offset old-fp)))))
-
- ((any-reg descriptor-reg)
- ;; Zot all the stack.
- (move esp-tn ebp-tn)
- ;; Restore the old-fp.
- (move ebp-tn old-fp)))
-
- ;; Return; return-pc is in a register.
- (inst jmp return-pc))
-
- ((sap-stack)
-
- #+nil (format t "*known-return: return-pc ~S on stack; offset=~S~%"
- return-pc (tn-offset return-pc))
-
- ;; Zot all of the stack except for the old-fp and return-pc.
- (inst lea esp-tn
- (make-ea :dword :base ebp-tn
- :disp (- (* (1+ (tn-offset return-pc)) word-bytes))))
- ;; Restore the old fp. old-fp may be either on the stack in its
- ;; save location or in a register, in either case this restores it.
- (move ebp-tn old-fp)
- ;; The return pops the return address (4 bytes), then we need
- ;; to pop all the slots before the return-pc which includes the
- ;; 4 bytes for the old-fp.
- (inst ret (* (tn-offset return-pc) word-bytes))))
-
+ (check-ocfp-and-return-pc old-fp return-pc)
+ (trace-table-entry trace-table-fun-epilogue)
+ ;; Zot all of the stack except for the old-fp and return-pc.
+ (inst mov esp-tn ebp-tn)
+ (inst pop ebp-tn)
+ (inst ret)
(trace-table-entry trace-table-normal)))
\f
;;;; full call
;;;
-;;; There is something of a cross-product effect with full calls. Different
-;;; versions are used depending on whether we know the number of arguments or
-;;; the name of the called function, and whether we want fixed values, unknown
-;;; values, or a tail call.
+;;; There is something of a cross-product effect with full calls.
+;;; Different versions are used depending on whether we know the
+;;; number of arguments or the name of the called function, and
+;;; whether we want fixed values, unknown values, or a tail call.
;;;
-;;; In full call, the arguments are passed creating a partial frame on the
-;;; stack top and storing stack arguments into that frame. On entry to the
-;;; callee, this partial frame is pointed to by FP.
+;;; In full call, the arguments are passed creating a partial frame on
+;;; the stack top and storing stack arguments into that frame. On
+;;; entry to the callee, this partial frame is pointed to by FP.
-;;; This macro helps in the definition of full call VOPs by avoiding code
-;;; replication in defining the cross-product VOPs.
+;;; This macro helps in the definition of full call VOPs by avoiding
+;;; code replication in defining the cross-product VOPs.
;;;
-;;; Name is the name of the VOP to define.
+;;; NAME is the name of the VOP to define.
;;;
-;;; Named is true if the first argument is an fdefinition object whose
+;;; NAMED is true if the first argument is an fdefinition object whose
;;; definition is to be called.
;;;
-;;; Return is either :Fixed, :Unknown or :Tail:
-;;; -- If :Fixed, then the call is for a fixed number of values, returned in
+;;; RETURN is either :FIXED, :UNKNOWN or :TAIL:
+;;; -- If :FIXED, then the call is for a fixed number of values, returned in
;;; the standard passing locations (passed as result operands).
-;;; -- If :Unknown, then the result values are pushed on the stack, and the
+;;; -- If :UNKNOWN, then the result values are pushed on the stack, and the
;;; result values are specified by the Start and Count as in the
;;; unknown-values continuation representation.
-;;; -- If :Tail, then do a tail-recursive call. No values are returned.
+;;; -- If :TAIL, then do a tail-recursive call. No values are returned.
;;; The Old-Fp and Return-PC are passed as the second and third arguments.
;;;
-;;; In non-tail calls, the pointer to the stack arguments is passed as the last
-;;; fixed argument. If Variable is false, then the passing locations are
-;;; passed as a more arg. Variable is true if there are a variable number of
-;;; arguments passed on the stack. Variable cannot be specified with :Tail
-;;; return. TR variable argument call is implemented separately.
+;;; In non-tail calls, the pointer to the stack arguments is passed as
+;;; the last fixed argument. If Variable is false, then the passing
+;;; locations are passed as a more arg. Variable is true if there are
+;;; a variable number of arguments passed on the stack. Variable
+;;; cannot be specified with :TAIL return. TR variable argument call
+;;; is implemented separately.
;;;
-;;; In tail call with fixed arguments, the passing locations are passed as a
-;;; more arg, but there is no new-FP, since the arguments have been set up in
-;;; the current frame.
+;;; In tail call with fixed arguments, the passing locations are
+;;; passed as a more arg, but there is no new-FP, since the arguments
+;;; have been set up in the current frame.
(macrolet ((define-full-call (name named return variable)
- (aver (not (and variable (eq return :tail))))
- `(define-vop (,name
- ,@(when (eq return :unknown)
- '(unknown-values-receiver)))
- (:args
- ,@(unless (eq return :tail)
- '((new-fp :scs (any-reg) :to (:argument 1))))
-
- (fun :scs (descriptor-reg control-stack)
- :target eax :to (:argument 0))
-
- ,@(when (eq return :tail)
- '((old-fp)
- (return-pc)))
-
- ,@(unless variable '((args :more t :scs (descriptor-reg)))))
-
- ,@(when (eq return :fixed)
- '((:results (values :more t))))
-
- (:save-p ,(if (eq return :tail) :compute-only t))
-
- ,@(unless (or (eq return :tail) variable)
- '((:move-args :full-call)))
-
- (:vop-var vop)
- (:info
- ,@(unless (or variable (eq return :tail)) '(arg-locs))
- ,@(unless variable '(nargs))
- ,@(when (eq return :fixed) '(nvals)))
-
- (:ignore
- ,@(unless (or variable (eq return :tail)) '(arg-locs))
- ,@(unless variable '(args)))
-
- ;; We pass either the fdefn object (for named call) or the actual
- ;; function object (for unnamed call) in EAX. With named call,
- ;; closure-tramp will replace it with the real function and invoke
- ;; the real function for closures. Non-closures do not need this
- ;; value, so don't care what shows up in it.
- (:temporary
- (:sc descriptor-reg :offset eax-offset :from (:argument 0) :to :eval)
- eax)
-
- ;; We pass the number of arguments in ECX.
- (:temporary (:sc unsigned-reg :offset ecx-offset :to :eval) ecx)
-
- ;; With variable call, we have to load the register-args out
- ;; of the (new) stack frame before doing the call. Therefore,
- ;; we have to tell the lifetime stuff that we need to use them.
- ,@(when variable
- (mapcar #'(lambda (name offset)
- `(:temporary (:sc descriptor-reg
- :offset ,offset
- :from (:argument 0)
- :to :eval)
- ,name))
- *register-arg-names* *register-arg-offsets*))
-
- ,@(when (eq return :tail)
- '((:temporary (:sc unsigned-reg
- :from (:argument 1)
- :to (:argument 2))
- old-fp-tmp)))
-
- (:generator ,(+ (if named 5 0)
- (if variable 19 1)
- (if (eq return :tail) 0 10)
- 15
- (if (eq return :unknown) 25 0))
- (trace-table-entry trace-table-call-site)
-
- ;; This has to be done before the frame pointer is changed!
- ;; eax stores the 'lexical environment' needed for closures
- (move eax fun)
-
-
- ,@(if variable
- ;; For variable call, compute the number of
- ;; arguments and move some of the arguments to
- ;; registers.
- (collect ((noise))
- ;; Compute the number of arguments.
- (noise '(inst mov ecx new-fp))
- (noise '(inst sub ecx esp-tn))
- ;; Move the necessary args to registers,
- ;; this moves them all even if they are
- ;; not all needed.
- (loop
- for name in *register-arg-names*
- for index downfrom -1
- do (noise `(loadw ,name new-fp ,index)))
- (noise))
- '((if (zerop nargs)
- (inst xor ecx ecx)
- (inst mov ecx (fixnumize nargs)))))
- ,@(cond ((eq return :tail)
- '(;; Python has figured out what frame we should
- ;; return to so might as well use that clue.
- ;; This seems really important to the
- ;; implementation of things like
- ;; (without-interrupts ...)
- ;;
- ;; dtc; Could be doing a tail call from a
- ;; known-local-call etc in which the old-fp
- ;; or ret-pc are in regs or in non-standard
- ;; places. If the passing location were
- ;; wired to the stack in standard locations
- ;; then these moves will be un-necessary;
- ;; this is probably best for the x86.
- (sc-case old-fp
- ((control-stack)
- (unless (= ocfp-save-offset
- (tn-offset old-fp))
- ;; FIXME: FORMAT T for stale
- ;; diagnostic output (several of
- ;; them around here), ick
- (format t "** tail-call old-fp not S0~%")
- (move old-fp-tmp old-fp)
- (storew old-fp-tmp
- ebp-tn
- (- (1+ ocfp-save-offset)))))
- ((any-reg descriptor-reg)
- (format t "** tail-call old-fp in reg not S0~%")
- (storew old-fp
- ebp-tn
- (- (1+ ocfp-save-offset)))))
-
- ;; For tail call, we have to push the
- ;; return-pc so that it looks like we CALLed
- ;; despite the fact that we are going to JMP.
- (inst push return-pc)
- ))
- (t
- ;; For non-tail call, we have to save our
- ;; frame pointer and install the new frame
- ;; pointer. We can't load stack tns after this
- ;; point.
- `(;; Python doesn't seem to allocate a frame
- ;; here which doesn't leave room for the
- ;; ofp/ret stuff.
-
- ;; The variable args are on the stack and
- ;; become the frame, but there may be <3
- ;; args and 3 stack slots are assumed
- ;; allocate on the call. So need to ensure
- ;; there are at least 3 slots. This hack
- ;; just adds 3 more.
- ,(if variable
- '(inst sub esp-tn (fixnumize 3)))
-
- ;; Save the fp
- (storew ebp-tn new-fp (- (1+ ocfp-save-offset)))
-
- (move ebp-tn new-fp) ; NB - now on new stack frame.
- )))
-
- (note-this-location vop :call-site)
-
- (inst ,(if (eq return :tail) 'jmp 'call)
- (make-ea :dword :base eax
- :disp ,(if named
- '(- (* fdefn-raw-addr-slot word-bytes)
- other-pointer-lowtag)
- '(- (* closure-fun-slot word-bytes)
- fun-pointer-lowtag))))
- ,@(ecase return
- (:fixed
- '((default-unknown-values vop values nvals)))
- (:unknown
- '((note-this-location vop :unknown-return)
- (receive-unknown-values values-start nvals start count)))
- (:tail))
- (trace-table-entry trace-table-normal)))))
+ (aver (not (and variable (eq return :tail))))
+ `(define-vop (,name
+ ,@(when (eq return :unknown)
+ '(unknown-values-receiver)))
+ (:args
+ ,@(unless (eq return :tail)
+ '((new-fp :scs (any-reg) :to (:argument 1))))
+
+ (fun :scs (descriptor-reg control-stack)
+ :target eax :to (:argument 0))
+
+ ,@(when (eq return :tail)
+ '((old-fp)
+ (return-pc)))
+
+ ,@(unless variable '((args :more t :scs (descriptor-reg)))))
+
+ ,@(when (eq return :fixed)
+ '((:results (values :more t))))
+
+ (:save-p ,(if (eq return :tail) :compute-only t))
+
+ ,@(unless (or (eq return :tail) variable)
+ '((:move-args :full-call)))
+
+ (:vop-var vop)
+ (:info
+ ,@(unless (or variable (eq return :tail)) '(arg-locs))
+ ,@(unless variable '(nargs))
+ ,@(when (eq return :fixed) '(nvals))
+ step-instrumenting)
+
+ (:ignore
+ ,@(unless (or variable (eq return :tail)) '(arg-locs))
+ ,@(unless variable '(args)))
+
+ ;; We pass either the fdefn object (for named call) or
+ ;; the actual function object (for unnamed call) in
+ ;; EAX. With named call, closure-tramp will replace it
+ ;; with the real function and invoke the real function
+ ;; for closures. Non-closures do not need this value,
+ ;; so don't care what shows up in it.
+ (:temporary
+ (:sc descriptor-reg
+ :offset eax-offset
+ :from (:argument 0)
+ :to :eval)
+ eax)
+
+ ;; We pass the number of arguments in ECX.
+ (:temporary (:sc unsigned-reg :offset ecx-offset :to :eval) ecx)
+
+ ;; With variable call, we have to load the
+ ;; register-args out of the (new) stack frame before
+ ;; doing the call. Therefore, we have to tell the
+ ;; lifetime stuff that we need to use them.
+ ,@(when variable
+ (mapcar (lambda (name offset)
+ `(:temporary (:sc descriptor-reg
+ :offset ,offset
+ :from (:argument 0)
+ :to :eval)
+ ,name))
+ *register-arg-names* *register-arg-offsets*))
+
+ ,@(when (eq return :tail)
+ '((:temporary (:sc unsigned-reg
+ :from (:argument 1)
+ :to (:argument 2))
+ old-fp-tmp)))
+ ,@(unless (eq return :tail)
+ '((:node-var node)))
+
+ (:generator ,(+ (if named 5 0)
+ (if variable 19 1)
+ (if (eq return :tail) 0 10)
+ 15
+ (if (eq return :unknown) 25 0))
+ (trace-table-entry trace-table-call-site)
+
+ ;; This has to be done before the frame pointer is
+ ;; changed! EAX stores the 'lexical environment' needed
+ ;; for closures.
+ (move eax fun)
+
+
+ ,@(if variable
+ ;; For variable call, compute the number of
+ ;; arguments and move some of the arguments to
+ ;; registers.
+ (collect ((noise))
+ ;; Compute the number of arguments.
+ (noise '(inst mov ecx new-fp))
+ (noise '(inst sub ecx esp-tn))
+ ;; Move the necessary args to registers,
+ ;; this moves them all even if they are
+ ;; not all needed.
+ (loop
+ for name in *register-arg-names*
+ for index downfrom -1
+ do (noise `(loadw ,name new-fp ,index)))
+ (noise))
+ '((if (zerop nargs)
+ (inst xor ecx ecx)
+ (inst mov ecx (fixnumize nargs)))))
+ ,@(cond ((eq return :tail)
+ '(;; Python has figured out what frame we should
+ ;; return to so might as well use that clue.
+ ;; This seems really important to the
+ ;; implementation of things like
+ ;; (without-interrupts ...)
+ ;;
+ ;; dtc; Could be doing a tail call from a
+ ;; known-local-call etc in which the old-fp
+ ;; or ret-pc are in regs or in non-standard
+ ;; places. If the passing location were
+ ;; wired to the stack in standard locations
+ ;; then these moves will be un-necessary;
+ ;; this is probably best for the x86.
+ (sc-case old-fp
+ ((control-stack)
+ (unless (= ocfp-save-offset
+ (tn-offset old-fp))
+ ;; FIXME: FORMAT T for stale
+ ;; diagnostic output (several of
+ ;; them around here), ick
+ (error "** tail-call old-fp not S0~%")
+ (move old-fp-tmp old-fp)
+ (storew old-fp-tmp
+ ebp-tn
+ (frame-word-offset ocfp-save-offset))))
+ ((any-reg descriptor-reg)
+ (error "** tail-call old-fp in reg not S0~%")
+ (storew old-fp
+ ebp-tn
+ (frame-word-offset ocfp-save-offset))))
+
+ ;; For tail call, we have to push the
+ ;; return-pc so that it looks like we CALLed
+ ;; despite the fact that we are going to JMP.
+ (inst push return-pc)
+ ))
+ (t
+ ;; For non-tail call, we have to save our
+ ;; frame pointer and install the new frame
+ ;; pointer. We can't load stack tns after this
+ ;; point.
+ `(;; Python doesn't seem to allocate a frame
+ ;; here which doesn't leave room for the
+ ;; ofp/ret stuff.
+
+ ;; The variable args are on the stack and
+ ;; become the frame, but there may be <3
+ ;; args and 3 stack slots are assumed
+ ;; allocate on the call. So need to ensure
+ ;; there are at least 3 slots. This hack
+ ;; just adds 3 more.
+ ,(if variable
+ '(inst sub esp-tn (fixnumize 3)))
+
+ ;; Bias the new-fp for use as an fp
+ ,(if variable
+ '(inst sub new-fp (fixnumize sp->fp-offset)))
+
+ ;; Save the fp
+ (storew ebp-tn new-fp
+ (frame-word-offset ocfp-save-offset))
+
+ (move ebp-tn new-fp) ; NB - now on new stack frame.
+ )))
+
+ (when step-instrumenting
+ (emit-single-step-test)
+ (inst jmp :eq DONE)
+ (inst break single-step-around-trap))
+ DONE
+
+ (note-this-location vop :call-site)
+
+ (inst ,(if (eq return :tail) 'jmp 'call)
+ ,(if named
+ '(make-ea-for-object-slot eax fdefn-raw-addr-slot
+ other-pointer-lowtag)
+ '(make-ea-for-object-slot eax closure-fun-slot
+ fun-pointer-lowtag)))
+ ,@(ecase return
+ (:fixed
+ '((default-unknown-values vop values nvals node)))
+ (:unknown
+ '((note-this-location vop :unknown-return)
+ (receive-unknown-values values-start nvals start count
+ node)))
+ (:tail))
+ (trace-table-entry trace-table-normal)))))
(define-full-call call nil :fixed nil)
(define-full-call call-named t :fixed nil)
(define-full-call call-variable nil :fixed t)
(define-full-call multiple-call-variable nil :unknown t))
-;;; This is defined separately, since it needs special code that BLT's the
-;;; arguments down. All the real work is done in the assembly routine. We just
-;;; set things up so that it can find what it needs.
+;;; This is defined separately, since it needs special code that BLT's
+;;; the arguments down. All the real work is done in the assembly
+;;; routine. We just set things up so that it can find what it needs.
(define-vop (tail-call-variable)
(:args (args :scs (any-reg control-stack) :target esi)
- (function :scs (descriptor-reg control-stack) :target eax)
- (old-fp)
- (ret-addr))
+ (function :scs (descriptor-reg control-stack) :target eax)
+ (old-fp)
+ (return-pc))
(:temporary (:sc unsigned-reg :offset esi-offset :from (:argument 0)) esi)
(:temporary (:sc unsigned-reg :offset eax-offset :from (:argument 1)) eax)
-; (:ignore ret-addr old-fp)
(:generator 75
+ (check-ocfp-and-return-pc old-fp return-pc)
;; Move these into the passing locations if they are not already there.
(move esi args)
(move eax function)
-
- ;; The following assumes that the return-pc and old-fp are on the
- ;; stack in their standard save locations - Check this.
- (unless (and (sc-is old-fp control-stack)
- (= (tn-offset old-fp) ocfp-save-offset))
- (error "tail-call-variable: ocfp not on stack in standard save location?"))
- (unless (and (sc-is ret-addr sap-stack)
- (= (tn-offset ret-addr) return-pc-save-offset))
- (error "tail-call-variable: ret-addr not on stack in standard save location?"))
-
-
;; And jump to the assembly routine.
(inst jmp (make-fixup 'tail-call-variable :assembly-routine))))
\f
;;;; unknown values return
-;;; Return a single-value using the Unknown-Values convention. Specifically,
-;;; we jump to clear the stack and jump to return-pc+2.
-;;;
-;;; We require old-fp to be in a register, because we want to reset ESP before
-;;; restoring EBP. If old-fp were still on the stack, it could get clobbered
-;;; by a signal.
+;;; Return a single-value using the Unknown-Values convention.
;;;
;;; pfw--get wired-tn conflicts sometimes if register sc specd for args
;;; having problems targeting args to regs -- using temps instead.
+;;;
+;;; First off, modifying the return-pc defeats the branch-prediction
+;;; optimizations on modern CPUs quite handily. Second, we can do all
+;;; this without needing a temp register. Fixed the latter, at least.
+;;; -- AB 2006/Feb/04
(define-vop (return-single)
(:args (old-fp)
- (return-pc)
- (value))
- (:temporary (:sc unsigned-reg) ofp)
- (:temporary (:sc unsigned-reg) ret)
+ (return-pc)
+ (value))
(:ignore value)
(:generator 6
- (trace-table-entry trace-table-function-epilogue)
- (move ret return-pc)
- ;; Clear the control stack
- (move ofp old-fp)
- ;; Adjust the return address for the single value return.
- (inst add ret 2)
- ;; Restore the frame pointer.
- (move esp-tn ebp-tn)
- (move ebp-tn ofp)
- ;; Out of here.
- (inst jmp ret)))
-
-;;; Do unknown-values return of a fixed (other than 1) number of values. The
-;;; Values are required to be set up in the standard passing locations. Nvals
-;;; is the number of values returned.
+ (check-ocfp-and-return-pc old-fp return-pc)
+ (trace-table-entry trace-table-fun-epilogue)
+ ;; Drop stack above old-fp
+ (inst mov esp-tn ebp-tn)
+ ;; Clear the multiple-value return flag
+ (inst clc)
+ ;; Restore the old frame pointer
+ (inst pop ebp-tn)
+ ;; And return.
+ (inst ret)))
+
+;;; Do unknown-values return of a fixed (other than 1) number of
+;;; values. The VALUES are required to be set up in the standard
+;;; passing locations. NVALS is the number of values returned.
;;;
-;;; Basically, we just load ECX with the number of values returned and EBX
-;;; with a pointer to the values, set ESP to point to the end of the values,
-;;; and jump directly to return-pc.
+;;; Basically, we just load ECX with the number of values returned and
+;;; EBX with a pointer to the values, set ESP to point to the end of
+;;; the values, and jump directly to return-pc.
(define-vop (return)
(:args (old-fp)
- (return-pc :to (:eval 1))
- (values :more t))
+ (return-pc :to (:eval 1))
+ (values :more t))
(:ignore values)
(:info nvals)
-
- ;; In the case of other than one value, we need these registers to tell
- ;; the caller where they are and how many there are.
+ ;; In the case of other than one value, we need these registers to
+ ;; tell the caller where they are and how many there are.
(:temporary (:sc unsigned-reg :offset ebx-offset) ebx)
(:temporary (:sc unsigned-reg :offset ecx-offset) ecx)
-
;; We need to stretch the lifetime of return-pc past the argument
;; registers so that we can default the argument registers without
;; trashing return-pc.
(:temporary (:sc unsigned-reg :offset (first *register-arg-offsets*)
- :from :eval) a0)
+ :from :eval) a0)
(:temporary (:sc unsigned-reg :offset (second *register-arg-offsets*)
- :from :eval) a1)
+ :from :eval) a1)
(:temporary (:sc unsigned-reg :offset (third *register-arg-offsets*)
- :from :eval) a2)
+ :from :eval) a2)
(:generator 6
- (trace-table-entry trace-table-function-epilogue)
+ (check-ocfp-and-return-pc old-fp return-pc)
+ (when (= nvals 1)
+ ;; This is handled in RETURN-SINGLE.
+ (error "nvalues is 1"))
+ (trace-table-entry trace-table-fun-epilogue)
;; Establish the values pointer and values count.
- (move ebx ebp-tn)
+ (inst lea ebx (make-ea :dword :base ebp-tn
+ :disp (* sp->fp-offset n-word-bytes)))
(if (zerop nvals)
- (inst xor ecx ecx) ; smaller
- (inst mov ecx (fixnumize nvals)))
- ;; restore the frame pointer.
- (move ebp-tn old-fp)
- ;; clear as much of the stack as possible, but not past the return
- ;; address.
- (inst lea esp-tn (make-ea :dword :base ebx
- :disp (- (* (max nvals 2) word-bytes))))
- ;; pre-default any argument register that need it.
+ (inst xor ecx ecx) ; smaller
+ (inst mov ecx (fixnumize nvals)))
+ ;; Pre-default any argument register that need it.
(when (< nvals register-arg-count)
(let* ((arg-tns (nthcdr nvals (list a0 a1 a2)))
- (first (first arg-tns)))
- (inst mov first nil-value)
- (dolist (tn (cdr arg-tns))
- (inst mov tn first))))
+ (first (first arg-tns)))
+ (inst mov first nil-value)
+ (dolist (tn (cdr arg-tns))
+ (inst mov tn first))))
+ ;; Set the multiple value return flag.
+ (inst stc)
;; And away we go. Except that return-pc is still on the
;; stack and we've changed the stack pointer. So we have to
;; tell it to index off of EBX instead of EBP.
- (cond ((zerop nvals)
- ;; Return popping the return address and the OCFP.
- (inst ret word-bytes))
- ((= nvals 1)
- ;; Return popping the return, leaving 1 slot. Can this
- ;; happen, or is a single value return handled elsewhere?
- (inst ret))
- (t
- (inst jmp (make-ea :dword :base ebx
- :disp (- (* (1+ (tn-offset return-pc))
- word-bytes))))))
+ (cond ((<= nvals register-arg-count)
+ (inst mov esp-tn ebp-tn)
+ (inst pop ebp-tn)
+ (inst ret))
+ (t
+ ;; Some values are on the stack after RETURN-PC and OLD-FP,
+ ;; can't return normally and some slots of the frame will
+ ;; be used as temporaries by the receiver.
+ ;;
+ ;; Clear as much of the stack as possible, but not past the
+ ;; old frame address.
+ (inst lea esp-tn
+ (make-ea :dword :base ebp-tn
+ :disp (frame-byte-offset (1- nvals))))
+ (move ebp-tn old-fp)
+ (inst push (make-ea :dword :base ebx
+ :disp (frame-byte-offset
+ (+ sp->fp-offset
+ (tn-offset return-pc)))))
+ (inst ret)))
(trace-table-entry trace-table-normal)))
-;;; Do unknown-values return of an arbitrary number of values (passed on the
-;;; stack.) We check for the common case of a single return value, and do that
-;;; inline using the normal single value return convention. Otherwise, we
-;;; branch off to code that calls an assembly-routine.
+;;; Do unknown-values return of an arbitrary number of values (passed
+;;; on the stack.) We check for the common case of a single return
+;;; value, and do that inline using the normal single value return
+;;; convention. Otherwise, we branch off to code that calls an
+;;; assembly-routine.
;;;
;;; The assembly routine takes the following args:
-;;; EAX -- the return-pc to finally jump to.
-;;; EBX -- pointer to where to put the values.
;;; ECX -- number of values to find there.
;;; ESI -- pointer to where to find the values.
(define-vop (return-multiple)
- (:args (old-fp :to (:eval 1) :target old-fp-temp)
- (return-pc :target eax)
- (vals :scs (any-reg) :target esi)
- (nvals :scs (any-reg) :target ecx))
-
- (:temporary (:sc unsigned-reg :offset eax-offset :from (:argument 1)) eax)
+ (:args (old-fp)
+ (return-pc)
+ (vals :scs (any-reg) :target esi)
+ (nvals :scs (any-reg) :target ecx))
(:temporary (:sc unsigned-reg :offset esi-offset :from (:argument 2)) esi)
(:temporary (:sc unsigned-reg :offset ecx-offset :from (:argument 3)) ecx)
- (:temporary (:sc unsigned-reg :offset ebx-offset :from (:eval 0)) ebx)
(:temporary (:sc descriptor-reg :offset (first *register-arg-offsets*)
- :from (:eval 0)) a0)
- (:temporary (:sc unsigned-reg :from (:eval 1)) old-fp-temp)
+ :from (:eval 0)) a0)
(:node-var node)
-
(:generator 13
- (trace-table-entry trace-table-function-epilogue)
- ;; Load the return-pc.
- (move eax return-pc)
+ (check-ocfp-and-return-pc old-fp return-pc)
+ (trace-table-entry trace-table-fun-epilogue)
(unless (policy node (> space speed))
;; Check for the single case.
(let ((not-single (gen-label)))
- (inst cmp nvals (fixnumize 1))
- (inst jmp :ne not-single)
-
- ;; Return with one value.
- (loadw a0 vals -1)
- ;; Clear the stack. We load old-fp into a register before clearing
- ;; the stack.
- (move old-fp-temp old-fp)
- (move esp-tn ebp-tn)
- (move ebp-tn old-fp-temp)
- ;; Fix the return-pc to point at the single-value entry point.
- (inst add eax 2)
- ;; Out of here.
- (inst jmp eax)
-
- ;; Nope, not the single case. Jump to the assembly routine.
- (emit-label not-single)))
+ (inst cmp nvals (fixnumize 1))
+ (inst jmp :ne not-single)
+ ;; Return with one value.
+ (loadw a0 vals -1)
+ ;; Clear the stack until ocfp.
+ (inst mov esp-tn ebp-tn)
+ ;; clear the multiple-value return flag
+ (inst clc)
+ ;; Out of here.
+ (inst pop ebp-tn)
+ (inst ret)
+ ;; Nope, not the single case. Jump to the assembly routine.
+ (emit-label not-single)))
(move esi vals)
(move ecx nvals)
- (move ebx ebp-tn)
- (move ebp-tn old-fp)
(inst jmp (make-fixup 'return-multiple :assembly-routine))
(trace-table-entry trace-table-normal)))
\f
;; Get result.
(move closure eax-tn)))
-;;; Copy a more arg from the argument area to the end of the current frame.
-;;; Fixed is the number of non-more arguments.
+;;; Copy a &MORE arg from the argument area to the end of the current
+;;; frame. FIXED is the number of non-&MORE arguments.
;;;
;;; The tricky part is doing this without trashing any of the calling
-;;; convention registers that are still needed. This vop is emitted directly
-;;; after the xep-allocate frame. That means the registers are in use as
-;;; follows:
+;;; convention registers that are still needed. This vop is emitted
+;;; directly after the xep-allocate frame. That means the registers
+;;; are in use as follows:
;;;
;;; EAX -- The lexenv.
;;; EBX -- Available.
-;;; ECX -- The total number of arguments.
+;;; ECX -- The total number of arguments * N-WORD-BYTES.
;;; EDX -- The first arg.
;;; EDI -- The second arg.
;;; ESI -- The third arg.
;;;
;;; So basically, we have one register available for our use: EBX.
;;;
-;;; What we can do is push the other regs onto the stack, and then restore
-;;; their values by looking directly below where we put the more-args.
+;;; What we can do is push the other regs onto the stack, and then
+;;; restore their values by looking directly below where we put the
+;;; more-args.
(define-vop (copy-more-arg)
(:info fixed)
(:generator 20
;; Avoid the copy if there are no more args.
(cond ((zerop fixed)
- (inst jecxz just-alloc-frame))
- (t
- (inst cmp ecx-tn (fixnumize fixed))
- (inst jmp :be just-alloc-frame)))
+ (inst jecxz JUST-ALLOC-FRAME))
+ (t
+ (inst cmp ecx-tn (fixnumize fixed))
+ (inst jmp :be JUST-ALLOC-FRAME)))
;; Allocate the space on the stack.
- ;; stack = ebp - (max 3 frame-size) - (nargs - fixed)
+ ;; stack = ebp + sp->fp-offset - (max 3 frame-size) - (nargs - fixed)
+ ;;
+ ;; Problem: this might leave some &more args outside esp, so
+ ;; clamp the movement for now. If fixed > frame-size, reset
+ ;; esp to the end of the current &more args (which *should*
+ ;; be a noop?), and only set esp to its final value after the
+ ;; stack-stack memmove loop. Otherwise, an unlucky signal
+ ;; could end up overwriting the &more arguments before they're
+ ;; moved in their final place.
(inst lea ebx-tn
- (make-ea :dword :base ebp-tn
- :disp (- (fixnumize fixed)
- (* sb!vm:word-bytes
- (max 3 (sb-allocated-size 'stack))))))
- (inst sub ebx-tn ecx-tn) ; Got the new stack in ebx
+ (make-ea :dword :base ebp-tn
+ :disp (* n-word-bytes
+ (- sp->fp-offset
+ (max 0
+ (- (max 3 (sb-allocated-size 'stack))
+ fixed))))))
+ (inst sub ebx-tn ecx-tn) ; Got the new stack in ebx
(inst mov esp-tn ebx-tn)
;; Now: nargs>=1 && nargs>fixed
(inst mov ebx-tn ecx-tn)
(cond ((< fixed register-arg-count)
- ;; We must stop when we run out of stack args, not when we
- ;; run out of more args.
- ;; Number to copy = nargs-3
- (inst sub ecx-tn (fixnumize register-arg-count))
- ;; Everything of interest in registers.
- (inst jmp :be do-regs))
- (t
- ;; Number to copy = nargs-fixed
- (inst sub ecx-tn (fixnumize fixed))))
-
- ;; Save edi and esi register args.
- (inst push edi-tn)
- (inst push esi-tn)
- ;; Okay, we have pushed the register args. We can trash them
- ;; now.
-
- ;; Initialize dst to be end of stack; skiping the values pushed
- ;; above.
- (inst lea edi-tn (make-ea :dword :base esp-tn :disp 8))
-
- ;; Initialize src to be end of args.
- (inst mov esi-tn ebp-tn)
- (inst sub esi-tn ebx-tn)
-
- (inst shr ecx-tn word-shift) ; make word count
- ;; And copy the args.
- (inst cld) ; auto-inc ESI and EDI.
- (inst rep)
- (inst movs :dword)
-
- ;; So now we need to restore EDI and ESI.
- (inst pop esi-tn)
- (inst pop edi-tn)
-
+ ;; We must stop when we run out of stack args, not when we
+ ;; run out of more args.
+ ;; Number to copy = nargs-3
+ (inst sub ecx-tn (fixnumize register-arg-count))
+ ;; Everything of interest in registers.
+ (inst jmp :be DO-REGS))
+ (t
+ ;; Number to copy = nargs-fixed
+ (inst sub ecx-tn (fixnumize fixed))))
+
+ (let ((delta (* n-word-bytes
+ (- (max 3 (sb-allocated-size 'stack))
+ fixed)))
+ (LOOP (gen-label)))
+ (cond ((zerop delta)
+ ;; nothing to move!
+ )
+ ((minusp delta)
+ ;; stack frame smaller than fixed; moving args to higher
+ ;; addresses (stack grows downard), so copy from the
+ ;; end. Moreover, because we'd have to shrink the frame,
+ ;; esp currently points at the end of the source args.
+ (inst push ebx-tn)
+
+ (emit-label LOOP)
+ (inst sub ecx-tn n-word-bytes)
+ (inst mov ebx-tn (make-ea :dword
+ :base esp-tn :index ecx-tn
+ ;; compensate for PUSH above
+ :disp n-word-bytes))
+ (inst mov (make-ea :dword
+ :base esp-tn :index ecx-tn
+ ;; compensate for PUSH, and
+ ;; add (abs delta)
+ :disp (- n-word-bytes delta))
+ ebx-tn)
+ (inst jmp :nz LOOP)
+
+ (inst pop ebx-tn))
+ ((plusp delta)
+ ;; stack frame larger than fixed. Moving args to lower
+ ;; addresses, so copy from the lowest address. esp
+ ;; already points to the lowest address of the destination.
+ (inst push ebx-tn)
+ (inst push esi-tn)
+
+ (inst xor ebx-tn ebx-tn)
+ (emit-label LOOP)
+ (inst mov esi-tn (make-ea :dword
+ :base esp-tn :index ebx-tn
+ ;; PUSHed 2 words
+ :disp (+ (* 2 n-word-bytes)
+ delta)))
+ (inst mov (make-ea :dword
+ :base esp-tn :index ebx-tn
+ :disp (* 2 n-word-bytes))
+ esi-tn)
+ (inst add ebx-tn n-word-bytes)
+ (inst sub ecx-tn n-word-bytes)
+ (inst jmp :nz LOOP)
+
+ (inst pop esi-tn)
+ (inst pop ebx-tn))))
DO-REGS
+ ;; stack can now be set to its final size
+ (when (< (max 3 (sb-allocated-size 'stack)) fixed)
+ (inst add esp-tn (* n-word-bytes
+ (- fixed
+ (max 3 (sb-allocated-size 'stack))))))
;; Restore ECX
(inst mov ecx-tn ebx-tn)
;; Here: nargs>=1 && nargs>fixed
(when (< fixed register-arg-count)
- ;; Now we have to deposit any more args that showed up in
- ;; registers.
- (do ((i fixed))
- ( nil )
- ;; Store it relative to ebp
- (inst mov (make-ea :dword :base ebp-tn
- :disp (- (* 4
- (+ 1 (- i fixed)
- (max 3 (sb-allocated-size 'stack))))))
- (nth i *register-arg-tns*))
-
- (incf i)
- (when (>= i register-arg-count)
- (return))
-
- ;; Don't deposit any more than there are.
- (if (zerop i)
- (inst test ecx-tn ecx-tn)
- (inst cmp ecx-tn (fixnumize i)))
- (inst jmp :eq done)))
-
- (inst jmp done)
+ ;; Now we have to deposit any more args that showed up in
+ ;; registers.
+ (do ((i fixed))
+ ( nil )
+ ;; Store it relative to ebp
+ (inst mov (make-ea :dword :base ebp-tn
+ :disp (* n-word-bytes
+ (- sp->fp-offset
+ (+ 1
+ (- i fixed)
+ (max 3 (sb-allocated-size
+ 'stack))))))
+ (nth i *register-arg-tns*))
+
+ (incf i)
+ (when (>= i register-arg-count)
+ (return))
+
+ ;; Don't deposit any more than there are.
+ (if (zerop i)
+ (inst test ecx-tn ecx-tn)
+ (inst cmp ecx-tn (fixnumize i)))
+ (inst jmp :eq DONE)))
+
+ (inst jmp DONE)
JUST-ALLOC-FRAME
(inst lea esp-tn
- (make-ea :dword :base ebp-tn
- :disp (- (* sb!vm:word-bytes
- (max 3 (sb-allocated-size 'stack))))))
+ (make-ea :dword :base ebp-tn
+ :disp (* n-word-bytes
+ (- sp->fp-offset
+ (max 3 (sb-allocated-size 'stack))))))
DONE))
-;;; More args are stored contiguously on the stack, starting immediately at the
-;;; context pointer. The context pointer is not typed, so the lowtag is 0.
-(define-vop (more-arg)
- (:translate %more-arg)
+(define-vop (more-kw-arg)
+ (:translate sb!c::%more-kw-arg)
(:policy :fast-safe)
- (:args (object :scs (descriptor-reg) :to :result)
- (index :scs (any-reg) :target temp))
+ (:args (object :scs (descriptor-reg) :to (:result 1))
+ (index :scs (any-reg immediate) :to (:result 1) :target keyword))
(:arg-types * tagged-num)
- (:temporary (:sc unsigned-reg :from (:argument 1) :to :result) temp)
- (:results (value :scs (any-reg descriptor-reg)))
- (:result-types *)
- (:generator 5
- (move temp index)
- (inst neg temp)
- (inst mov value (make-ea :dword :base object :index temp))))
+ (:results (value :scs (descriptor-reg any-reg))
+ (keyword :scs (descriptor-reg any-reg)))
+ (:result-types * *)
+ (:generator 4
+ (sc-case index
+ (immediate
+ (inst mov value (make-ea :dword :base object :disp (tn-value index)))
+ (inst mov keyword (make-ea :dword :base object
+ :disp (+ (tn-value index) n-word-bytes))))
+ (t
+ (inst mov value (make-ea :dword :base object :index index))
+ (inst mov keyword (make-ea :dword :base object :index index
+ :disp n-word-bytes))))))
-(define-vop (more-arg-c)
- (:translate %more-arg)
+(define-vop (more-arg)
+ (:translate sb!c::%more-arg)
(:policy :fast-safe)
- (:args (object :scs (descriptor-reg)))
- (:info index)
- (:arg-types * (:constant (signed-byte 30)))
- (:results (value :scs (any-reg descriptor-reg)))
+ (:args (object :scs (descriptor-reg) :to (:result 1))
+ (index :scs (any-reg) :to (:result 1) :target value))
+ (:arg-types * tagged-num)
+ (:results (value :scs (descriptor-reg any-reg)))
(:result-types *)
(:generator 4
- (inst mov value
- (make-ea :dword :base object :disp (- (* index word-bytes))))))
-
+ (move value index)
+ (inst neg value)
+ (inst mov value (make-ea :dword :base object :index value))))
;;; Turn more arg (context, count) into a list.
(define-vop (listify-rest-args)
(:translate %listify-rest-args)
(:policy :safe)
(:args (context :scs (descriptor-reg) :target src)
- (count :scs (any-reg) :target ecx))
+ (count :scs (any-reg) :target ecx))
(:arg-types * tagged-num)
(:temporary (:sc unsigned-reg :offset esi-offset :from (:argument 0)) src)
(:temporary (:sc unsigned-reg :offset ecx-offset :from (:argument 1)) ecx)
(:node-var node)
(:generator 20
(let ((enter (gen-label))
- (loop (gen-label))
- (done (gen-label)))
+ (loop (gen-label))
+ (done (gen-label))
+ (stack-allocate-p (node-stack-allocate-p node)))
(move src context)
(move ecx count)
;; Check to see whether there are no args, and just return NIL if so.
(inst mov result nil-value)
(inst jecxz done)
- (inst lea dst (make-ea :dword :index ecx :scale 2))
- (pseudo-atomic
- (allocation dst dst node)
- (inst lea dst (make-ea :byte :base dst :disp list-pointer-lowtag))
- ;; Convert the count into a raw value, so that we can use the LOOP inst.
- (inst shr ecx 2)
+ (inst lea dst (make-ea :dword :base ecx :index ecx))
+ (maybe-pseudo-atomic stack-allocate-p
+ (allocation dst dst node stack-allocate-p list-pointer-lowtag)
;; Set decrement mode (successive args at lower addresses)
(inst std)
;; Set up the result.
(move result dst)
- ;; Jump into the middle of the loop, 'cause that's were we want
+ ;; Jump into the middle of the loop, 'cause that's where we want
;; to start.
(inst jmp enter)
(emit-label loop)
;; Compute a pointer to the next cons.
- (inst add dst (* cons-size word-bytes))
+ (inst add dst (* cons-size n-word-bytes))
;; Store a pointer to this cons in the CDR of the previous cons.
(storew dst dst -1 list-pointer-lowtag)
(emit-label enter)
(inst lods eax)
(storew eax dst 0 list-pointer-lowtag)
;; Go back for more.
- (inst loop loop)
+ (inst sub ecx n-word-bytes)
+ (inst jmp :nz loop)
;; NIL out the last cons.
- (storew nil-value dst 1 sb!vm:list-pointer-lowtag))
+ (storew nil-value dst 1 list-pointer-lowtag)
+ (inst cld))
(emit-label done))))
;;; Return the location and size of the &MORE arg glob created by
-;;; COPY-MORE-Arg. SUPPLIED is the total number of arguments supplied
+;;; COPY-MORE-ARG. SUPPLIED is the total number of arguments supplied
;;; (originally passed in ECX). FIXED is the number of non-rest
;;; arguments.
;;;
(:arg-types positive-fixnum (:constant fixnum))
(:info fixed)
(:results (context :scs (descriptor-reg))
- (count :scs (any-reg)))
+ (count :scs (any-reg)))
(:result-types t tagged-num)
(:note "more-arg-context")
(:generator 5
;; SP at this point points at the last arg pushed.
;; Point to the first more-arg, not above it.
(inst lea context (make-ea :dword :base esp-tn
- :index count :scale 1
- :disp (- (+ (fixnumize fixed) 4))))
+ :index count :scale 1
+ :disp (- (+ (fixnumize fixed) n-word-bytes))))
(unless (zerop fixed)
(inst sub count (fixnumize fixed)))))
;;; Signal wrong argument count error if NARGS isn't equal to COUNT.
-(define-vop (verify-argument-count)
+(define-vop (verify-arg-count)
(:policy :fast-safe)
- (:translate sb!c::%verify-argument-count)
+ (:translate sb!c::%verify-arg-count)
(:args (nargs :scs (any-reg)))
(:arg-types positive-fixnum (:constant t))
(:info count)
(:save-p :compute-only)
(:generator 3
(let ((err-lab
- (generate-error-code vop invalid-argument-count-error nargs)))
+ (generate-error-code vop 'invalid-arg-count-error nargs)))
(if (zerop count)
- (inst test nargs nargs) ; smaller instruction
- (inst cmp nargs (fixnumize count)))
+ (inst test nargs nargs) ; smaller instruction
+ (inst cmp nargs (fixnumize count)))
(inst jmp :ne err-lab))))
;;; Various other error signallers.
-(macrolet ((frob (name error translate &rest args)
- `(define-vop (,name)
- ,@(when translate
- `((:policy :fast-safe)
- (:translate ,translate)))
- (:args ,@(mapcar #'(lambda (arg)
- `(,arg :scs (any-reg descriptor-reg)))
- args))
- (:vop-var vop)
- (:save-p :compute-only)
- (:generator 1000
- (error-call vop ,error ,@args)))))
- (frob argument-count-error invalid-argument-count-error
- sb!c::%argument-count-error nargs)
- (frob type-check-error object-not-type-error sb!c::%type-check-error
+(macrolet ((def (name error translate &rest args)
+ `(define-vop (,name)
+ ,@(when translate
+ `((:policy :fast-safe)
+ (:translate ,translate)))
+ (:args ,@(mapcar (lambda (arg)
+ `(,arg :scs (any-reg descriptor-reg)))
+ args))
+ (:vop-var vop)
+ (:save-p :compute-only)
+ (:generator 1000
+ (error-call vop ',error ,@args)))))
+ (def arg-count-error invalid-arg-count-error
+ sb!c::%arg-count-error nargs)
+ (def type-check-error object-not-type-error sb!c::%type-check-error
object type)
- (frob layout-invalid-error layout-invalid-error sb!c::%layout-invalid-error
+ (def layout-invalid-error layout-invalid-error sb!c::%layout-invalid-error
object layout)
- (frob odd-key-arguments-error odd-key-arguments-error
- sb!c::%odd-key-arguments-error)
- (frob unknown-key-argument-error unknown-key-argument-error
- sb!c::%unknown-key-argument-error key)
- (frob nil-function-returned-error nil-function-returned-error nil fun))
+ (def odd-key-args-error odd-key-args-error
+ sb!c::%odd-key-args-error)
+ (def unknown-key-arg-error unknown-key-arg-error
+ sb!c::%unknown-key-arg-error key)
+ (def nil-fun-returned-error nil-fun-returned-error nil fun))
+
+;;; Single-stepping
+
+(defun emit-single-step-test ()
+ ;; We use different ways of representing whether stepping is on on
+ ;; +SB-THREAD / -SB-THREAD: on +SB-THREAD, we use a slot in the
+ ;; thread structure. On -SB-THREAD we use the value of a static
+ ;; symbol. Things are done this way, since reading a thread-local
+ ;; slot from a symbol would require an extra register on +SB-THREAD,
+ ;; and reading a slot from a thread structure would require an extra
+ ;; register on -SB-THREAD.
+ #!+sb-thread
+ (progn
+ #!+win32 (inst push eax-tn)
+ (with-tls-ea (EA :base #!+win32 eax-tn #!-win32 :unused
+ :disp-type :constant
+ :disp (* thread-stepping-slot n-word-bytes))
+ (inst cmp EA nil-value :maybe-fs))
+ #!+win32 (inst pop eax-tn))
+ #!-sb-thread
+ (inst cmp (make-ea-for-symbol-value sb!impl::*stepping*)
+ nil-value))
+
+(define-vop (step-instrument-before-vop)
+ (:policy :fast-safe)
+ (:vop-var vop)
+ (:generator 3
+ (emit-single-step-test)
+ (inst jmp :eq DONE)
+ (inst break single-step-before-trap)
+ DONE
+ (note-this-location vop :step-before-vop)))
projects / sbcl.git / blobdiff