-;;; routines for call-out to C.
-;;;
-;;; Written by William Lott.
-;;;
+;;;; VOPs and other machine-specific support routines for call-out to C
+
+;;;; This software is part of the SBCL system. See the README file for
+;;;; more information.
+;;;;
+;;;; This software is derived from the CMU CL system, which was
+;;;; written at Carnegie Mellon University and released into the
+;;;; public domain. The software is in the public domain and is
+;;;; provided with absolutely no warranty. See the COPYING and CREDITS
+;;;; files for more information.
+
(in-package "SB!VM")
+;;; Return the number of bytes needed for the current non-descriptor
+;;; stack frame. Non-descriptor stack frames must be multiples of 16
+;;; bytes under the PPC SVr4 ABI (though the EABI may be less
+;;; restrictive). On linux, two words are reserved for the stack
+;;; backlink and saved LR (see SB!VM::NUMBER-STACK-DISPLACEMENT).
+
+(defconstant +stack-alignment-bytes+
+ ;; Duh. PPC Linux (and VxWorks) adhere to the EABI.
+ #!-darwin 7
+ ;; But Darwin doesn't
+ #!+darwin 15)
+
(defun my-make-wired-tn (prim-type-name sc-name offset)
(make-wired-tn (primitive-type-or-lose prim-type-name)
(sc-number-or-lose sc-name)
(defstruct arg-state
(gpr-args 0)
(fpr-args 0)
- ;SVR4 [a]abi wants two words on stack (callee saved lr, backpointer).
- (stack-frame-size 2))
+ ;; SVR4 [a]abi wants two words on stack (callee saved lr,
+ ;; backpointer).
+ #!-darwin (stack-frame-size 2)
+ ;; PowerOpen ABI wants 8 words on the stack corresponding to GPR3-10
+ ;; in addition to the 6 words of link area (see number-stack-displacement)
+ #!+darwin (stack-frame-size (+ 8 6)))
(defun int-arg (state prim-type reg-sc stack-sc)
(let ((reg-args (arg-state-gpr-args state)))
(declare (ignore type))
(int-arg state 'system-area-pointer 'sap-reg 'sap-stack))
-; If a single-float arg has to go on the stack, it's promoted to
-; double. That way, C programs can get subtle rounding errors
-; when unrelated arguments are introduced.
+;;; If a single-float arg has to go on the stack, it's promoted to
+;;; double. That way, C programs can get subtle rounding errors when
+;;; unrelated arguments are introduced.
+#!-darwin
(define-alien-type-method (single-float :arg-tn) (type state)
(declare (ignore type))
(let* ((fprs (arg-state-fpr-args state)))
(cond ((< fprs 8)
(incf (arg-state-fpr-args state))
- ; Assign outgoing FPRs starting at FP1
+ ;; Assign outgoing FPRs starting at FP1
(my-make-wired-tn 'single-float 'single-reg (1+ fprs)))
(t
(let* ((stack-offset (arg-state-stack-frame-size state)))
(setf (arg-state-stack-frame-size state) (+ stack-offset 2))
(my-make-wired-tn 'double-float 'double-stack stack-offset))))))
+#!+darwin
+(define-alien-type-method (single-float :arg-tn) (type state)
+ (declare (ignore type))
+ (let* ((fprs (arg-state-fpr-args state))
+ (gprs (arg-state-gpr-args state)))
+ (cond ((< gprs 8) ; and by implication also (< fprs 13)
+ ;; Corresponding GPR is kept empty for functions with fixed args
+ (incf (arg-state-gpr-args state))
+ (incf (arg-state-fpr-args state))
+ ;; Assign outgoing FPRs starting at FP1
+ (my-make-wired-tn 'single-float 'single-reg (1+ fprs)))
+ ((< fprs 13)
+ ;; According to PowerOpen ABI, we need to pass those both in the
+ ;; FPRs _and_ the stack. However empiric testing on OS X/gcc
+ ;; shows they are only passed in FPRs, AFAICT.
+ ;;
+ ;; "I" in "AFAICT" probably refers to PRM. -- CSR, still
+ ;; reverse-engineering comments in 2003 :-)
+ (incf (arg-state-fpr-args state))
+ (incf (arg-state-stack-frame-size state))
+ (my-make-wired-tn 'single-float 'single-reg (1+ fprs)))
+ (t
+ ;; Pass on stack only
+ (let ((stack-offset (arg-state-stack-frame-size state)))
+ (incf (arg-state-stack-frame-size state))
+ (my-make-wired-tn 'single-float 'single-stack stack-offset))))))
+#!-darwin
(define-alien-type-method (double-float :arg-tn) (type state)
(declare (ignore type))
(let* ((fprs (arg-state-fpr-args state)))
(cond ((< fprs 8)
(incf (arg-state-fpr-args state))
- ; Assign outgoing FPRs starting at FP1
+ ;; Assign outgoing FPRs starting at FP1
(my-make-wired-tn 'double-float 'double-reg (1+ fprs)))
(t
(let* ((stack-offset (arg-state-stack-frame-size state)))
(setf (arg-state-stack-frame-size state) (+ stack-offset 2))
(my-make-wired-tn 'double-float 'double-stack stack-offset))))))
-(define-alien-type-method (integer :result-tn) (type)
- (if (alien-integer-type-signed type)
- (my-make-wired-tn 'signed-byte-32 'signed-reg nl0-offset)
- (my-make-wired-tn 'unsigned-byte-32 'unsigned-reg nl0-offset)))
+#!+darwin
+(define-alien-type-method (double-float :arg-tn) (type state)
+ (declare (ignore type))
+ (let ((fprs (arg-state-fpr-args state))
+ (gprs (arg-state-gpr-args state)))
+ (cond ((< gprs 8) ; and by implication also (< fprs 13)
+ ;; Corresponding GPRs are also kept empty
+ (incf (arg-state-gpr-args state) 2)
+ (when (> (arg-state-gpr-args state) 8)
+ ;; Spill one word to stack
+ (decf (arg-state-gpr-args state))
+ (incf (arg-state-stack-frame-size state)))
+ (incf (arg-state-fpr-args state))
+ ;; Assign outgoing FPRs starting at FP1
+ (my-make-wired-tn 'double-float 'double-reg (1+ fprs)))
+ ((< fprs 13)
+ ;; According to PowerOpen ABI, we need to pass those both in the
+ ;; FPRs _and_ the stack. However empiric testing on OS X/gcc
+ ;; shows they are only passed in FPRs, AFAICT.
+ (incf (arg-state-stack-frame-size state) 2)
+ (incf (arg-state-fpr-args state))
+ (my-make-wired-tn 'double-float 'double-reg (1+ fprs)))
+ (t
+ ;; Pass on stack only
+ (let ((stack-offset (arg-state-stack-frame-size state)))
+ (incf (arg-state-stack-frame-size state) 2)
+ (my-make-wired-tn 'double-float 'double-stack stack-offset))))))
+
+;;; Result state handling
+(defstruct result-state
+ (num-results 0))
+(defun result-reg-offset (slot)
+ (ecase slot
+ (0 nl0-offset)
+ (1 nl1-offset)))
+
+;;; FIXME: These #!-DARWIN methods should be adjusted to take a state
+;;; argument, firstly because that's our "official" API (see
+;;; src/code/host-alieneval) and secondly because that way we can
+;;; probably have less duplication of code. -- CSR, 2003-07-29
+
+#!-darwin
(define-alien-type-method (system-area-pointer :result-tn) (type)
(declare (ignore type))
(my-make-wired-tn 'system-area-pointer 'sap-reg nl0-offset))
-(define-alien-type-method (single-float :result-tn) (type)
+#!+darwin
+(define-alien-type-method (system-area-pointer :result-tn) (type state)
(declare (ignore type))
+ (let ((num-results (result-state-num-results state)))
+ (setf (result-state-num-results state) (1+ num-results))
+ (my-make-wired-tn 'system-area-pointer 'sap-reg
+ (result-reg-offset num-results))))
+
+#!-darwin
+(define-alien-type-method (single-float :result-tn) (type)
+ (declare (ignore type state))
(my-make-wired-tn 'single-float 'single-reg 1))
+#!+darwin
+(define-alien-type-method (single-float :result-tn) (type state)
+ (declare (ignore type state))
+ (my-make-wired-tn 'single-float 'single-reg 1))
+
+#!-darwin
(define-alien-type-method (double-float :result-tn) (type)
(declare (ignore type))
(my-make-wired-tn 'double-float 'double-reg 1))
+#!+darwin
+(define-alien-type-method (double-float :result-tn) (type state)
+ (declare (ignore type state))
+ (my-make-wired-tn 'double-float 'double-reg 1))
+
+#!-darwin
(define-alien-type-method (values :result-tn) (type)
(mapcar #'(lambda (type)
(invoke-alien-type-method :result-tn type))
(alien-values-type-values type)))
+#!+darwin
+(define-alien-type-method (values :result-tn) (type state)
+ (let ((values (alien-values-type-values type)))
+ (when (> (length values) 2)
+ (error "Too many result values from c-call."))
+ (mapcar #'(lambda (type)
+ (invoke-alien-type-method :result-tn type state))
+ values)))
+#!-darwin
+(define-alien-type-method (integer :result-tn) (type)
+ (if (alien-integer-type-signed type)
+ (my-make-wired-tn 'signed-byte-32 'signed-reg nl0-offset)
+ (my-make-wired-tn 'unsigned-byte-32 'unsigned-reg nl0-offset)))
+
+#!+darwin
+(define-alien-type-method (integer :result-tn) (type state)
+ (let ((num-results (result-state-num-results state)))
+ (setf (result-state-num-results state) (1+ num-results))
+ (multiple-value-bind (ptype reg-sc)
+ (if (alien-integer-type-signed type)
+ (values 'signed-byte-32 'signed-reg)
+ (values 'unsigned-byte-32 'unsigned-reg))
+ (my-make-wired-tn ptype reg-sc (result-reg-offset num-results)))))
+
(!def-vm-support-routine make-call-out-tns (type)
(declare (type alien-fun-type type))
(arg-tns)
(invoke-alien-type-method
:result-tn
- (alien-fun-type-result-type type))))))
+ (alien-fun-type-result-type type)
+ #!+darwin (make-result-state))))))
+#!+darwin
+(deftransform %alien-funcall ((function type &rest args))
+ (assert (sb!c::constant-lvar-p type))
+ (let* ((type (sb!c::lvar-value type))
+ (arg-types (alien-fun-type-arg-types type))
+ (result-type (alien-fun-type-result-type type)))
+ (assert (= (length arg-types) (length args)))
+ ;; We need to do something special for 64-bit integer arguments
+ ;; and results.
+ (if (or (some #'(lambda (type)
+ (and (alien-integer-type-p type)
+ (> (sb!alien::alien-integer-type-bits type) 32)))
+ arg-types)
+ (and (alien-integer-type-p result-type)
+ (> (sb!alien::alien-integer-type-bits result-type) 32)))
+ (collect ((new-args) (lambda-vars) (new-arg-types))
+ (dolist (type arg-types)
+ (let ((arg (gensym)))
+ (lambda-vars arg)
+ (cond ((and (alien-integer-type-p type)
+ (> (sb!alien::alien-integer-type-bits type) 32))
+ ;; 64-bit long long types are stored in
+ ;; consecutive locations, most significant word
+ ;; first (big-endian).
+ (new-args `(ash ,arg -32))
+ (new-args `(logand ,arg #xffffffff))
+ (if (alien-integer-type-signed type)
+ (new-arg-types (parse-alien-type '(signed 32) (sb!kernel:make-null-lexenv)))
+ (new-arg-types (parse-alien-type '(unsigned 32) (sb!kernel:make-null-lexenv))))
+ (new-arg-types (parse-alien-type '(unsigned 32) (sb!kernel:make-null-lexenv))))
+ (t
+ (new-args arg)
+ (new-arg-types type)))))
+ (cond ((and (alien-integer-type-p result-type)
+ (> (sb!alien::alien-integer-type-bits result-type) 32))
+ (let ((new-result-type
+ (let ((sb!alien::*values-type-okay* t))
+ (parse-alien-type
+ (if (alien-integer-type-signed result-type)
+ '(values (signed 32) (unsigned 32))
+ '(values (unsigned 32) (unsigned 32)))
+ (sb!kernel:make-null-lexenv)))))
+ `(lambda (function type ,@(lambda-vars))
+ (declare (ignore type))
+ (multiple-value-bind (high low)
+ (%alien-funcall function
+ ',(make-alien-fun-type
+ :arg-types (new-arg-types)
+ :result-type new-result-type)
+ ,@(new-args))
+ (logior low (ash high 32))))))
+ (t
+ `(lambda (function type ,@(lambda-vars))
+ (declare (ignore type))
+ (%alien-funcall function
+ ',(make-alien-fun-type
+ :arg-types (new-arg-types)
+ :result-type result-type)
+ ,@(new-args))))))
+ (sb!c::give-up-ir1-transform))))
(define-vop (foreign-symbol-address)
(:translate foreign-symbol-address)
(:policy :fast-safe)
(:args)
- (:arg-types (:constant simple-string))
+ (:arg-types (:constant simple-base-string))
(:info foreign-symbol)
(:results (res :scs (sap-reg)))
(:result-types system-area-pointer)
(:generator 2
- (inst lr res (make-fixup foreign-symbol :foreign))))
+ (inst lr res (make-fixup (extern-alien-name foreign-symbol) :foreign))))
(define-vop (call-out)
(:args (function :scs (sap-reg) :target cfunc)
(let ((cur-nfp (current-nfp-tn vop)))
(when cur-nfp
(store-stack-tn nfp-save cur-nfp))
- (inst lr temp (make-fixup "call_into_c" :foreign))
+ (inst lr temp (make-fixup (extern-alien-name "call_into_c") :foreign))
(inst mtctr temp)
(move cfunc function)
(inst bctrl)
(:temporary (:scs (unsigned-reg) :to (:result 0)) temp)
(:generator 0
(unless (zerop amount)
- (let ((delta (- (logandc2 (+ amount 8 7) 7))))
+ ;; FIXME: I don't understand why we seem to be adding
+ ;; NUMBER-STACK-DISPLACEMENT twice here. Weird. -- CSR,
+ ;; 2003-08-20
+ (let ((delta (- (logandc2 (+ amount number-stack-displacement
+ +stack-alignment-bytes+)
+ +stack-alignment-bytes+))))
(cond ((>= delta (ash -1 16))
(inst stwu nsp-tn nsp-tn delta))
(t
(:policy :fast-safe)
(:generator 0
(unless (zerop amount)
- (let ((delta (logandc2 (+ amount 8 7) 7)))
+ (let ((delta (logandc2 (+ amount number-stack-displacement
+ +stack-alignment-bytes+)
+ +stack-alignment-bytes+)))
(cond ((< delta (ash 1 16))
(inst addi nsp-tn nsp-tn delta))
(t
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