(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.
-
+;;; The Linux/PPC 32bit ABI says:
+;;;
+;;; If a single-float arg has to go on the stack, it's promoted to
+;;; a double.
+;;;
+;;; gcc does:
+;;;
+;;; Excess floats stored on the stack are stored as floats.
+;;;
+;;; We follow gcc.
#!-darwin
(define-alien-type-method (single-float :arg-tn) (type state)
(declare (ignore type))
(my-make-wired-tn 'single-float 'single-reg (1+ fprs)))
(t
(let* ((stack-offset (arg-state-stack-frame-size state)))
- (if (oddp stack-offset)
- (incf stack-offset))
- (setf (arg-state-stack-frame-size state) (+ stack-offset 2))
- (my-make-wired-tn 'double-float 'double-stack stack-offset))))))
+ (setf (arg-state-stack-frame-size state) (+ stack-offset 1))
+ (my-make-wired-tn 'single-float 'single-stack stack-offset))))))
+;;; 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 ((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))
;;; 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))
-
-#!+darwin
(define-alien-type-method (system-area-pointer :result-tn) (type state)
(declare (ignore type))
(let ((num-results (result-state-num-results state)))
(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)
(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))
(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))
(let ((arg-state (make-arg-state)))
(invoke-alien-type-method
:result-tn
(alien-fun-type-result-type type)
- #!+darwin (make-result-state))))))
+ (make-result-state))))))
+
+
+;;; Sort out long longs, by splitting them up. However, need to take
+;;; care about register/stack alignment and whether they will fully
+;;; fit into registers or must go on the stack.
+#!-darwin
+(deftransform %alien-funcall ((function type &rest args))
+ (aver (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))
+ (gprs 0)
+ (fprs 0)
+ (stack 0))
+ (aver (= (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))
+ (when (or
+ (oddp gprs)
+ (and
+ (oddp stack)
+ (> gprs 7)))
+ ;; Need to pad for alignment.
+ (if (oddp gprs)
+ (incf gprs)
+ (incf stack))
+ (new-args 0)
+ (new-arg-types (parse-alien-type
+ '(unsigned 32)
+ (sb!kernel:make-null-lexenv))))
+ (if (< gprs 8)
+ (incf gprs 2)
+ (incf stack 2))
+ (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))))
+ ((alien-integer-type-p type)
+ (if (< gprs 8)
+ (incf gprs 1)
+ (incf stack 1))
+ (new-args arg)
+ (new-arg-types type))
+ ((alien-single-float-type-p type)
+ (if (< fprs 8)
+ (incf fprs)
+ (incf stack))
+ (new-args arg)
+ (new-arg-types type))
+ ((alien-double-float-type-p type)
+ (if (< fprs 8)
+ (incf fprs)
+ (if (oddp stack)
+ (incf stack 3) ; Doubles are aligned on
+ (incf stack 2))) ; the stack.
+ (new-args arg)
+ (new-arg-types type))
+ (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))))
#!+darwin
(deftransform %alien-funcall ((function type &rest args))
(t
`(deref (sap-alien (sap+ ,sap ,offset) (* ,type)))))))
- ;;; The "Mach-O Runtime Conventions" document for OS X almost specifies
- ;;; the calling convention (it neglects to mention that the linkage
- ;;; area is 24 bytes).
+ ;;; The "Mach-O Runtime Conventions" document for OS X almost
+ ;;; specifies the calling convention (it neglects to mention that
+ ;;; the linkage area is 24 bytes).
+ #!+darwin
(defconstant n-foreign-linkage-area-bytes 24)
+ ;;; On linux only use 8 bytes for LR and Back chain. JRXR
+ ;;; 2006/11/10.
+ #!-darwin
+ (defconstant n-foreign-linkage-area-bytes 8)
+
+ ;;; Returns a vector in static space containing machine code for the
+ ;;; callback wrapper. Linux version. JRXR. 2006/11/13
+ #!-darwin
+ (defun alien-callback-assembler-wrapper (index result-type argument-types)
+ (flet ((make-gpr (n)
+ (make-random-tn :kind :normal :sc (sc-or-lose 'any-reg) :offset n))
+ (make-fpr (n)
+ (make-random-tn :kind :normal :sc (sc-or-lose
+ 'double-reg) :offset
+ n)))
+ (let* ((segment (make-segment)))
+ (assemble (segment)
+ ;; Copy args from registers or stack to new position
+ ;; on stack.
+ (let* (
+ ;; Argument store.
+ (arg-store-size
+ (* n-word-bytes
+ (apply '+
+ (mapcar (lambda (type)
+ (ceiling (alien-type-bits type)
+ n-word-bits))
+ argument-types ))))
+ ;; Return area allocation.
+ (n-return-area-words
+ (ceiling (or (alien-type-bits result-type) 0) n-word-bits))
+ (n-return-area-bytes (* n-return-area-words
+ n-word-bytes))
+ ;; FIXME: magic constant, and probably n-args-bytes
+ ;; JRXR: What's this for? Copied from Darwin.
+ (args-size (* 3 n-word-bytes))
+ (frame-size (logandc2
+ (+ arg-store-size
+ n-return-area-bytes
+ args-size
+ SB!VM::NUMBER-STACK-DISPLACEMENT
+ +stack-alignment-bytes+)
+ +stack-alignment-bytes+))
+ (return-area-pos (- frame-size
+ SB!VM::NUMBER-STACK-DISPLACEMENT
+ args-size))
+ (arg-store-pos (- return-area-pos
+ n-return-area-bytes))
+ (stack-pointer (make-gpr 1))
+ (r0 (make-gpr 0))
+ (f0 (make-fpr 0))
+ (in-words-processed 0)
+ (out-words-processed 0)
+ (gprs (mapcar #'make-gpr '(3 4 5 6 7 8 9 10)))
+ (fprs (mapcar #'make-fpr
+ '(1 2 3 4 5 6 7 8))) )
+ ;; Setup useful functions and then copy all args.
+ (flet ((load-address-into (reg addr)
+ (let ((high (ldb (byte 16 16) addr))
+ (low (ldb (byte 16 0) addr)))
+ (inst lis reg high)
+ (inst ori reg reg low)))
+ (save-arg (type words)
+ (let ((integerp (not (alien-float-type-p type)))
+ (in-offset (+ (* in-words-processed n-word-bytes)
+ n-foreign-linkage-area-bytes))
+ (out-offset (- (* out-words-processed n-word-bytes)
+ arg-store-pos)))
+ (cond (integerp
+ (if (and
+ ;; Only upto long longs are passed
+ ;; in registers.
+ (<= words 2)
+ ;; And needs space for whole arg,
+ ;; including alignment.
+ (<= (+ words
+ (rem (length gprs) words))
+ (length gprs)))
+ (progn
+ (if (/= 0
+ (rem (length gprs) words))
+ (pop gprs))
+ (dotimes (k words)
+ (let ((gpr (pop gprs)))
+ (inst stw gpr stack-pointer
+ out-offset))
+ (incf out-words-processed)
+ (incf out-offset n-word-bytes)))
+ (progn
+ ;; First ensure alignment.
+ ;; FIXME! If passing structures
+ ;; becomes allowable, then this is
+ ;; broken.
+ (if (/= 0
+ (rem in-words-processed
+ words))
+ (progn
+ (incf in-words-processed)
+ (incf in-offset
+ n-word-bytes)))
+ (dotimes (k words)
+ ;; Copy from memory to memory.
+ (inst lwz r0 stack-pointer
+ in-offset)
+ (inst stw r0 stack-pointer
+ out-offset)
+ (incf out-words-processed)
+ (incf out-offset n-word-bytes)
+ (incf in-words-processed)
+ (incf in-offset n-word-bytes)))))
+ ;; The handling of floats is a little ugly
+ ;; because we hard-code the number of words
+ ;; for single- and double-floats.
+ ((alien-single-float-type-p type)
+ (let ((fpr (pop fprs)))
+ (if fpr
+ (inst stfs fpr stack-pointer out-offset)
+ (progn
+ ;; The ABI says that floats
+ ;; stored on the stack are
+ ;; promoted to doubles. gcc
+ ;; stores them as floats.
+ ;; Follow gcc here.
+ ;; => no alignment needed either.
+ (inst lfs f0
+ stack-pointer in-offset)
+ (inst stfs f0
+ stack-pointer out-offset)
+ (incf in-words-processed))))
+ (incf out-words-processed))
+ ((alien-double-float-type-p type)
+ (let ((fpr (pop fprs)))
+ (if fpr
+ (inst stfd fpr stack-pointer out-offset)
+ (progn
+ ;; Ensure alignment.
+ (if (oddp in-words-processed)
+ (progn
+ (incf in-words-processed)
+ (incf in-offset n-word-bytes)))
+ (inst lfd f0
+ stack-pointer in-offset)
+ (inst stfd f0
+ stack-pointer out-offset)
+ (incf in-words-processed 2))))
+ (incf out-words-processed 2))
+ (t
+ (bug "Unknown alien floating point type: ~S" type))))))
+ (mapc #'save-arg
+ argument-types
+ (mapcar (lambda (arg)
+ (ceiling (alien-type-bits arg) n-word-bits))
+ argument-types))
+
+ ;; Arranged the args, allocated the return area. Now
+ ;; actuall call funcall3: funcall3 (call-alien-function,
+ ;; index, args, return-area)
+
+ (destructuring-bind (arg1 arg2 arg3 arg4)
+ (mapcar #'make-gpr '(3 4 5 6))
+ (load-address-into arg1 (+ nil-value (static-symbol-offset
+ 'sb!alien::*enter-alien-callback*)))
+ (loadw arg1 arg1 symbol-value-slot other-pointer-lowtag)
+ (inst li arg2 (fixnumize index))
+ (inst addi arg3 stack-pointer (- arg-store-pos))
+ (inst addi arg4 stack-pointer (- return-area-pos)))
+
+ ;; Setup everything. Now save sp, setup the frame.
+ (inst mflr r0)
+ (inst stw r0 stack-pointer (* 2 n-word-bytes)) ; FIXME: magic
+ ; constant, copied from Darwin.
+ (inst stwu stack-pointer stack-pointer (- frame-size))
+
+ ;; And make the call.
+ (load-address-into r0 (foreign-symbol-address "funcall3"))
+ (inst mtlr r0)
+ (inst blrl)
+
+ ;; We're back! Restore sp and lr, load the
+ ;; return value from just under sp, and return.
+ (inst lwz stack-pointer stack-pointer 0)
+ (inst lwz r0 stack-pointer (* 2 n-word-bytes))
+ (inst mtlr r0)
+ (cond
+ ((sb!alien::alien-single-float-type-p result-type)
+ (let ((f1 (make-fpr 1)))
+ (inst lfs f1 stack-pointer (- return-area-pos))))
+ ((sb!alien::alien-double-float-type-p result-type)
+ (let ((f1 (make-fpr 1)))
+ (inst lfd f1 stack-pointer (- return-area-pos))))
+ ((sb!alien::alien-void-type-p result-type)
+ ;; Nothing to do
+ )
+ (t
+ (loop with gprs = (mapcar #'make-gpr '(3 4))
+ repeat n-return-area-words
+ for gpr = (pop gprs)
+ for offset from (- return-area-pos)
+ by n-word-bytes
+ do
+ (unless gpr
+ (bug "Out of return registers in alien-callback trampoline."))
+ (inst lwz gpr stack-pointer offset))))
+ (inst blr))))
+ (finalize-segment segment)
+
+ ;; Now that the segment is done, convert it to a static
+ ;; vector we can point foreign code to.
+ (let* ((buffer (sb!assem::segment-buffer segment))
+ (vector (make-static-vector (length buffer)
+ :element-type '(unsigned-byte 8)
+ :initial-contents buffer))
+ (sap (sb!sys:vector-sap vector)))
+ (sb!alien:alien-funcall
+ (sb!alien:extern-alien "ppc_flush_icache"
+ (function void
+ system-area-pointer
+ unsigned-long))
+ sap (length buffer))
+ vector))))
+
;;; Returns a vector in static space containing machine code for the
;;; callback wrapper
+ #!+darwin
(defun alien-callback-assembler-wrapper (index result-type argument-types)
(flet ((make-gpr (n)
(make-random-tn :kind :normal :sc (sc-or-lose 'any-reg) :offset n))
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