X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fx86-64%2Fc-call.lisp;h=d90427f6324d4bc3be6b4fc2d6db416831dc2075;hb=49e8403800426f37a54d9b87353a31af36e7af40;hp=634be98ed6ff00be33bf13c14ed3efa85753abb6;hpb=0d871fd7a98fc4af92a8b942a1154761466ad8c9;p=sbcl.git diff --git a/src/compiler/x86-64/c-call.lisp b/src/compiler/x86-64/c-call.lisp index 634be98..d90427f 100644 --- a/src/compiler/x86-64/c-call.lisp +++ b/src/compiler/x86-64/c-call.lisp @@ -74,8 +74,6 @@ (0 eax-offset) (1 edx-offset))) -;; XXX The return handling probably doesn't conform to the ABI - (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)) @@ -86,9 +84,10 @@ (my-make-wired-tn ptype reg-sc (result-reg-offset num-results))))) (define-alien-type-method (integer :naturalize-gen) (type alien) - (if (and (alien-integer-type-signed type) - (<= (alien-type-bits type) 32)) - `(sign-extend ,alien) + (if (<= (alien-type-bits type) 32) + (if (alien-integer-type-signed type) + `(sign-extend ,alien ,(alien-type-bits type)) + `(logand ,alien ,(1- (ash 1 (alien-type-bits type))))) alien)) (define-alien-type-method (system-area-pointer :result-tn) (type state) @@ -150,6 +149,10 @@ (lambda-vars arg) (cond ((and (alien-integer-type-p type) (> (sb!alien::alien-integer-type-bits type) 64)) + ;; CLH: FIXME! This should really be + ;; #xffffffffffffffff. nyef says: "Passing + ;; 128-bit integers to ALIEN functions on x86-64 + ;; believed to be broken." (new-args `(logand ,arg #xffffffff)) (new-args `(ash ,arg -64)) (new-arg-types (parse-alien-type '(unsigned 64) env)) @@ -187,28 +190,44 @@ ,@(new-args)))))) (sb!c::give-up-ir1-transform)))) -;;; The ABI specifies that signed short/int's are returned as 32-bit -;;; values. Negative values need to be sign-extended to 64-bits (done -;;; in a :NATURALIZE-GEN alien-type-method). -(defknown sign-extend (fixnum) fixnum (foldable flushable movable)) +;;; The ABI is vague about how signed sub-word integer return values +;;; are handled, but since gcc versions >=4.3 no longer do sign +;;; extension in the callee, we need to do it in the caller. FIXME: +;;; If the value to be extended is known to already be of the target +;;; type at compile time, we can (and should) elide the extension. +(defknown sign-extend ((signed-byte 64) t) fixnum + (foldable flushable movable)) (define-vop (sign-extend) (:translate sign-extend) (:policy :fast-safe) - (:args (val :scs (any-reg))) - (:arg-types fixnum) - (:results (res :scs (any-reg))) + (:args (val :scs (signed-reg))) + (:arg-types signed-num (:constant fixnum)) + (:info size) + (:results (res :scs (signed-reg))) (:result-types fixnum) (:generator 1 (inst movsxd res (make-random-tn :kind :normal - :sc (sc-or-lose 'dword-reg) + :sc (sc-or-lose (ecase size + (8 'byte-reg) + (16 'word-reg) + (32 'dword-reg))) :offset (tn-offset val))))) -(defun sign-extend (x) - (if (logbitp 31 x) - (dpb x (byte 32 0) -1) - (ldb (byte 32 0) x))) +#-sb-xc-host +(defun sign-extend (x size) + (declare (type (signed-byte 64) x)) + (ecase size + (8 (sign-extend x size)) + (16 (sign-extend x size)) + (32 (sign-extend x size)))) + +#+sb-xc-host +(defun sign-extend (x size) + (if (logbitp (1- size) x) + (dpb x (byte size 0) -1) + x)) (define-vop (foreign-symbol-sap) (:translate foreign-symbol-sap) @@ -242,6 +261,8 @@ (:vop-var vop) (:save-p t) (:generator 0 + ;; ABI: Direction flag must be clear on function entry. -- JES, 2006-01-20 + (inst cld) ;; ABI: AL contains amount of arguments passed in XMM registers ;; for vararg calls. (move-immediate rax @@ -251,23 +272,19 @@ 'float-registers))) (inst call function) ;; To give the debugger a clue. XX not really internal-error? - (note-this-location vop :internal-error) - ;; FLOAT15 needs to contain FP zero in Lispland - (let ((float15 (make-random-tn :kind :normal - :sc (sc-or-lose 'double-reg) - :offset float15-offset))) - (inst xorpd float15 float15)))) + (note-this-location vop :internal-error))) (define-vop (alloc-number-stack-space) (:info amount) (:results (result :scs (sap-reg any-reg))) + (:result-types system-area-pointer) (:generator 0 (aver (location= result rsp-tn)) (unless (zerop amount) (let ((delta (logandc2 (+ amount 7) 7))) (inst sub rsp-tn delta))) ;; C stack must be 16 byte aligned - (inst and rsp-tn #xfffffff0) + (inst and rsp-tn -16) (move result rsp-tn))) (define-vop (dealloc-number-stack-space) @@ -281,6 +298,7 @@ (:info amount) #!+sb-thread (:temporary (:sc unsigned-reg) temp) (:results (result :scs (sap-reg any-reg))) + (:result-types system-area-pointer) #!+sb-thread (:generator 0 (aver (not (location= result rsp-tn))) @@ -334,25 +352,152 @@ (- other-pointer-lowtag))) delta))))) -;;; these are not strictly part of the c-call convention, but are -;;; needed for the WITH-PRESERVED-POINTERS macro used for "locking -;;; down" lisp objects so that GC won't move them while foreign -;;; functions go to work. - -(define-vop (push-word-on-c-stack) - (:translate push-word-on-c-stack) - (:args (val :scs (sap-reg))) - (:policy :fast-safe) - (:arg-types system-area-pointer) - (:generator 2 - (inst push val))) - -(define-vop (pop-words-from-c-stack) - (:translate pop-words-from-c-stack) - (:args) - (:arg-types (:constant (unsigned-byte 60))) - (:info number) +;;; not strictly part of the c-call convention, but needed for the +;;; WITH-PINNED-OBJECTS macro used for "locking down" lisp objects so +;;; that GC won't move them while foreign functions go to work. +(define-vop (touch-object) + (:translate touch-object) + (:args (object)) + (:ignore object) (:policy :fast-safe) - (:generator 2 - (inst add rsp-tn (fixnumize number)))) - + (:arg-types t) + (:generator 0)) + +;;; Callbacks + +#-sb-xc-host +(defun alien-callback-accessor-form (type sp offset) + `(deref (sap-alien (sap+ ,sp ,offset) (* ,type)))) + +#-sb-xc-host +(defun alien-callback-assembler-wrapper (index result-type argument-types) + (labels ((make-tn-maker (sc-name) + (lambda (offset) + (make-random-tn :kind :normal + :sc (sc-or-lose sc-name) + :offset offset))) + (out-of-registers-error () + (error "Too many arguments in callback"))) + (let* ((segment (make-segment)) + (rax rax-tn) + (rcx rcx-tn) + (rdi rdi-tn) + (rsi rsi-tn) + (rdx rdx-tn) + (rbp rbp-tn) + (rsp rsp-tn) + (xmm0 float0-tn) + ([rsp] (make-ea :qword :base rsp :disp 0)) + ;; How many arguments have been copied + (arg-count 0) + ;; How many arguments have been copied from the stack + (stack-argument-count 0) + (gprs (mapcar (make-tn-maker 'any-reg) *c-call-register-arg-offsets*)) + (fprs (mapcar (make-tn-maker 'double-reg) + ;; Only 8 first XMM registers are used for + ;; passing arguments + (subseq *float-regs* 0 8)))) + (assemble (segment) + ;; Make room on the stack for arguments. + (inst sub rsp (* n-word-bytes (length argument-types))) + ;; Copy arguments from registers to stack + (dolist (type argument-types) + (let ((integerp (not (alien-float-type-p type))) + ;; A TN pointing to the stack location where the + ;; current argument should be stored for the purposes + ;; of ENTER-ALIEN-CALLBACK. + (target-tn (make-ea :qword :base rsp + :disp (* arg-count + n-word-bytes))) + ;; A TN pointing to the stack location that contains + ;; the next argument passed on the stack. + (stack-arg-tn (make-ea :qword :base rsp + :disp (* (+ 1 + (length argument-types) + stack-argument-count) + n-word-bytes)))) + (incf arg-count) + (cond (integerp + (let ((gpr (pop gprs))) + ;; Argument not in register, copy it from the old + ;; stack location to a temporary register. + (unless gpr + (incf stack-argument-count) + (setf gpr temp-reg-tn) + (inst mov gpr stack-arg-tn)) + ;; Copy from either argument register or temporary + ;; register to target. + (inst mov target-tn gpr))) + ((or (alien-single-float-type-p type) + (alien-double-float-type-p type)) + (let ((fpr (pop fprs))) + (cond (fpr + ;; Copy from float register to target location. + (inst movq target-tn fpr)) + (t + ;; Not in float register. Copy from stack to + ;; temporary (general purpose) register, and + ;; from there to the target location. + (incf stack-argument-count) + (inst mov temp-reg-tn stack-arg-tn) + (inst mov target-tn temp-reg-tn))))) + (t + (bug "Unknown alien floating point type: ~S" type))))) + + ;; arg0 to FUNCALL3 (function) + ;; + ;; Indirect the access to ENTER-ALIEN-CALLBACK through + ;; the symbol-value slot of SB-ALIEN::*ENTER-ALIEN-CALLBACK* + ;; to ensure it'll work even if the GC moves ENTER-ALIEN-CALLBACK. + ;; Skip any SB-THREAD TLS magic, since we don't expect anyone + ;; to rebind the variable. -- JES, 2006-01-01 + (inst mov rdi (+ nil-value (static-symbol-offset + 'sb!alien::*enter-alien-callback*))) + (loadw rdi rdi symbol-value-slot other-pointer-lowtag) + ;; arg0 to ENTER-ALIEN-CALLBACK (trampoline index) + (inst mov rsi (fixnumize index)) + ;; arg1 to ENTER-ALIEN-CALLBACK (pointer to argument vector) + (inst mov rdx rsp) + ;; add room on stack for return value + (inst sub rsp 8) + ;; arg2 to ENTER-ALIEN-CALLBACK (pointer to return value) + (inst mov rcx rsp) + + ;; Make new frame + (inst push rbp) + (inst mov rbp rsp) + + ;; Call + (inst mov rax (foreign-symbol-address "funcall3")) + (inst call rax) + + ;; Back! Restore frame + (inst mov rsp rbp) + (inst pop rbp) + + ;; Result now on top of stack, put it in the right register + (cond + ((or (alien-integer-type-p result-type) + (alien-pointer-type-p result-type) + (alien-type-= #.(parse-alien-type 'system-area-pointer nil) + result-type)) + (inst mov rax [rsp])) + ((or (alien-single-float-type-p result-type) + (alien-double-float-type-p result-type)) + (inst movq xmm0 [rsp])) + ((alien-void-type-p result-type)) + (t + (error "unrecognized alien type: ~A" result-type))) + + ;; Pop the arguments and the return value from the stack to get + ;; the return address at top of stack. + (inst add rsp (* (1+ (length argument-types)) n-word-bytes)) + ;; Return + (inst ret)) + (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))) + (make-static-vector (length buffer) + :element-type '(unsigned-byte 8) + :initial-contents buffer)))))