X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcompiler%2Fx86-64%2Fc-call.lisp;h=32fb566f0d3a5a22f398c7574984cada9b97016c;hb=c9b36f04557bd6c7208863e73bae7b1bc6e64842;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..32fb566 100644 --- a/src/compiler/x86-64/c-call.lisp +++ b/src/compiler/x86-64/c-call.lisp @@ -190,14 +190,15 @@ ;;; 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)) +(defknown sign-extend ((signed-byte 32)) fixnum + (foldable flushable movable)) (define-vop (sign-extend) (:translate sign-extend) (:policy :fast-safe) - (:args (val :scs (any-reg))) + (:args (val :scs (signed-reg))) (:arg-types fixnum) - (:results (res :scs (any-reg))) + (:results (res :scs (signed-reg))) (:result-types fixnum) (:generator 1 (inst movsxd res @@ -206,9 +207,8 @@ :offset (tn-offset val))))) (defun sign-extend (x) - (if (logbitp 31 x) - (dpb x (byte 32 0) -1) - (ldb (byte 32 0) x))) + (declare (type (signed-byte 32) x)) + (sign-extend x)) (define-vop (foreign-symbol-sap) (:translate foreign-symbol-sap) @@ -242,6 +242,8 @@ (: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 @@ -251,12 +253,7 @@ '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) @@ -267,7 +264,7 @@ (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) @@ -356,3 +353,141 @@ (:generator 2 (inst add rsp-tn (fixnumize number)))) +;;; 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)))))