1 ;;;; the VOPs and other necessary machine specific support
2 ;;;; routines for call-out to C
4 ;;;; This software is part of the SBCL system. See the README file for
7 ;;;; This software is derived from the CMU CL system, which was
8 ;;;; written at Carnegie Mellon University and released into the
9 ;;;; public domain. The software is in the public domain and is
10 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
11 ;;;; files for more information.
15 ;; The MOVE-ARG vop is going to store args on the stack for
16 ;; call-out. These tn's will be used for that. move-arg is normally
17 ;; used for things going down the stack but C wants to have args
18 ;; indexed in the positive direction.
20 (defun my-make-wired-tn (prim-type-name sc-name offset)
21 (make-wired-tn (primitive-type-or-lose prim-type-name)
22 (sc-number-or-lose sc-name)
25 (defstruct (arg-state (:copier nil))
30 (defun int-arg (state prim-type reg-sc stack-sc)
31 (let ((reg-args (arg-state-register-args state)))
33 (setf (arg-state-register-args state) (1+ reg-args))
34 (my-make-wired-tn prim-type reg-sc
35 (nth reg-args *c-call-register-arg-offsets*)))
37 (let ((frame-size (arg-state-stack-frame-size state)))
38 (setf (arg-state-stack-frame-size state) (1+ frame-size))
39 (my-make-wired-tn prim-type stack-sc frame-size))))))
41 (define-alien-type-method (integer :arg-tn) (type state)
42 (if (alien-integer-type-signed type)
43 (int-arg state 'signed-byte-64 'signed-reg 'signed-stack)
44 (int-arg state 'unsigned-byte-64 'unsigned-reg 'unsigned-stack)))
46 (define-alien-type-method (system-area-pointer :arg-tn) (type state)
47 (declare (ignore type))
48 (int-arg state 'system-area-pointer 'sap-reg 'sap-stack))
50 (defun float-arg (state prim-type reg-sc stack-sc)
51 (let ((xmm-args (arg-state-xmm-args state)))
53 (setf (arg-state-xmm-args state) (1+ xmm-args))
54 (my-make-wired-tn prim-type reg-sc
55 (nth xmm-args *float-regs*)))
57 (let ((frame-size (arg-state-stack-frame-size state)))
58 (setf (arg-state-stack-frame-size state) (1+ frame-size))
59 (my-make-wired-tn prim-type stack-sc frame-size))))))
61 (define-alien-type-method (double-float :arg-tn) (type state)
62 (declare (ignore type))
63 (float-arg state 'double-float 'double-reg 'double-stack))
65 (define-alien-type-method (single-float :arg-tn) (type state)
66 (declare (ignore type))
67 (float-arg state 'single-float 'single-reg 'single-stack))
69 (defstruct (result-state (:copier nil))
72 (defun result-reg-offset (slot)
77 ;; XXX The return handling probably doesn't conform to the ABI
79 (define-alien-type-method (integer :result-tn) (type state)
80 (let ((num-results (result-state-num-results state)))
81 (setf (result-state-num-results state) (1+ num-results))
82 (multiple-value-bind (ptype reg-sc)
83 (if (alien-integer-type-signed type)
84 (values 'signed-byte-64 'signed-reg)
85 (values 'unsigned-byte-64 'unsigned-reg))
86 (my-make-wired-tn ptype reg-sc (result-reg-offset num-results)))))
88 (define-alien-type-method (integer :naturalize-gen) (type alien)
89 (if (and (alien-integer-type-signed type)
90 (<= (alien-type-bits type) 32))
94 (define-alien-type-method (system-area-pointer :result-tn) (type state)
95 (declare (ignore type))
96 (let ((num-results (result-state-num-results state)))
97 (setf (result-state-num-results state) (1+ num-results))
98 (my-make-wired-tn 'system-area-pointer 'sap-reg
99 (result-reg-offset num-results))))
101 (define-alien-type-method (double-float :result-tn) (type state)
102 (declare (ignore type))
103 (let ((num-results (result-state-num-results state)))
104 (setf (result-state-num-results state) (1+ num-results))
105 (my-make-wired-tn 'double-float 'double-reg num-results)))
107 (define-alien-type-method (single-float :result-tn) (type state)
108 (declare (ignore type))
109 (let ((num-results (result-state-num-results state)))
110 (setf (result-state-num-results state) (1+ num-results))
111 (my-make-wired-tn 'single-float 'single-reg num-results)))
113 (define-alien-type-method (values :result-tn) (type state)
114 (let ((values (alien-values-type-values type)))
115 (when (> (length values) 2)
116 (error "Too many result values from c-call."))
117 (mapcar (lambda (type)
118 (invoke-alien-type-method :result-tn type state))
121 (!def-vm-support-routine make-call-out-tns (type)
122 (let ((arg-state (make-arg-state)))
124 (dolist (arg-type (alien-fun-type-arg-types type))
125 (arg-tns (invoke-alien-type-method :arg-tn arg-type arg-state)))
126 (values (my-make-wired-tn 'positive-fixnum 'any-reg esp-offset)
127 (* (arg-state-stack-frame-size arg-state) n-word-bytes)
129 (invoke-alien-type-method :result-tn
130 (alien-fun-type-result-type type)
131 (make-result-state))))))
134 (deftransform %alien-funcall ((function type &rest args) * * :node node)
135 (aver (sb!c::constant-lvar-p type))
136 (let* ((type (sb!c::lvar-value type))
137 (env (sb!c::node-lexenv node))
138 (arg-types (alien-fun-type-arg-types type))
139 (result-type (alien-fun-type-result-type type)))
140 (aver (= (length arg-types) (length args)))
141 (if (or (some #'(lambda (type)
142 (and (alien-integer-type-p type)
143 (> (sb!alien::alien-integer-type-bits type) 64)))
145 (and (alien-integer-type-p result-type)
146 (> (sb!alien::alien-integer-type-bits result-type) 64)))
147 (collect ((new-args) (lambda-vars) (new-arg-types))
148 (dolist (type arg-types)
149 (let ((arg (gensym)))
151 (cond ((and (alien-integer-type-p type)
152 (> (sb!alien::alien-integer-type-bits type) 64))
153 (new-args `(logand ,arg #xffffffff))
154 (new-args `(ash ,arg -64))
155 (new-arg-types (parse-alien-type '(unsigned 64) env))
156 (if (alien-integer-type-signed type)
157 (new-arg-types (parse-alien-type '(signed 64) env))
158 (new-arg-types (parse-alien-type '(unsigned 64) env))))
161 (new-arg-types type)))))
162 (cond ((and (alien-integer-type-p result-type)
163 (> (sb!alien::alien-integer-type-bits result-type) 64))
164 (let ((new-result-type
165 (let ((sb!alien::*values-type-okay* t))
167 (if (alien-integer-type-signed result-type)
168 '(values (unsigned 64) (signed 64))
169 '(values (unsigned 64) (unsigned 64)))
171 `(lambda (function type ,@(lambda-vars))
172 (declare (ignore type))
173 (multiple-value-bind (low high)
174 (%alien-funcall function
175 ',(make-alien-fun-type
176 :arg-types (new-arg-types)
177 :result-type new-result-type)
179 (logior low (ash high 64))))))
181 `(lambda (function type ,@(lambda-vars))
182 (declare (ignore type))
183 (%alien-funcall function
184 ',(make-alien-fun-type
185 :arg-types (new-arg-types)
186 :result-type result-type)
188 (sb!c::give-up-ir1-transform))))
190 ;;; The ABI specifies that signed short/int's are returned as 32-bit
191 ;;; values. Negative values need to be sign-extended to 64-bits (done
192 ;;; in a :NATURALIZE-GEN alien-type-method).
193 (defknown sign-extend (fixnum) fixnum (foldable flushable movable))
195 (define-vop (sign-extend)
196 (:translate sign-extend)
198 (:args (val :scs (any-reg)))
200 (:results (res :scs (any-reg)))
201 (:result-types fixnum)
204 (make-random-tn :kind :normal
205 :sc (sc-or-lose 'dword-reg)
206 :offset (tn-offset val)))))
208 (defun sign-extend (x)
210 (dpb x (byte 32 0) -1)
211 (ldb (byte 32 0) x)))
213 (define-vop (foreign-symbol-address)
214 (:translate foreign-symbol-address)
217 (:arg-types (:constant simple-string))
218 (:info foreign-symbol)
219 (:results (res :scs (sap-reg)))
220 (:result-types system-area-pointer)
222 (inst lea res (make-fixup foreign-symbol :foreign))))
225 (define-vop (foreign-symbol-dataref-address)
226 (:translate foreign-symbol-dataref-address)
229 (:arg-types (:constant simple-string))
230 (:info foreign-symbol)
231 (:results (res :scs (sap-reg)))
232 (:result-types system-area-pointer)
234 (inst mov res (make-fixup foreign-symbol :foreign-dataref))))
236 (define-vop (call-out)
237 (:args (function :scs (sap-reg))
239 (:results (results :more t))
240 (:temporary (:sc unsigned-reg :offset rax-offset :to :result) rax)
245 ;; ABI: AL contains amount of arguments passed in XMM registers
248 (loop for tn-ref = args then (tn-ref-across tn-ref)
250 count (eq (sb-name (sc-sb (tn-sc (tn-ref-tn tn-ref))))
253 ;; To give the debugger a clue. XX not really internal-error?
254 (note-this-location vop :internal-error)
255 ;; FLOAT15 needs to contain FP zero in Lispland
256 (let ((float15 (make-random-tn :kind :normal
257 :sc (sc-or-lose 'double-reg)
258 :offset float15-offset)))
259 (inst xorpd float15 float15))))
261 (define-vop (alloc-number-stack-space)
263 (:results (result :scs (sap-reg any-reg)))
265 (aver (location= result rsp-tn))
266 (unless (zerop amount)
267 (let ((delta (logandc2 (+ amount 7) 7)))
268 (inst sub rsp-tn delta)))
269 ;; C stack must be 16 byte aligned
270 (inst and rsp-tn #xfffffff0)
271 (move result rsp-tn)))
273 (define-vop (dealloc-number-stack-space)
276 (unless (zerop amount)
277 (let ((delta (logandc2 (+ amount 7) 7)))
278 (inst add rsp-tn delta)))))
280 (define-vop (alloc-alien-stack-space)
282 #!+sb-thread (:temporary (:sc unsigned-reg) temp)
283 (:results (result :scs (sap-reg any-reg)))
286 (aver (not (location= result rsp-tn)))
287 (unless (zerop amount)
288 (let ((delta (logandc2 (+ amount 7) 7)))
292 (static-symbol-offset '*alien-stack*)
293 (ash symbol-tls-index-slot word-shift)
294 (- other-pointer-lowtag))))
295 (inst fs-segment-prefix)
296 (inst sub (make-ea :dword :scale 1 :index temp) delta)))
297 (load-tl-symbol-value result *alien-stack*))
300 (aver (not (location= result rsp-tn)))
301 (unless (zerop amount)
302 (let ((delta (logandc2 (+ amount 7) 7)))
303 (inst sub (make-ea :qword
305 (static-symbol-offset '*alien-stack*)
306 (ash symbol-value-slot word-shift)
307 (- other-pointer-lowtag)))
309 (load-symbol-value result *alien-stack*)))
311 (define-vop (dealloc-alien-stack-space)
313 #!+sb-thread (:temporary (:sc unsigned-reg) temp)
316 (unless (zerop amount)
317 (let ((delta (logandc2 (+ amount 7) 7)))
321 (static-symbol-offset '*alien-stack*)
322 (ash symbol-tls-index-slot word-shift)
323 (- other-pointer-lowtag))))
324 (inst fs-segment-prefix)
325 (inst add (make-ea :dword :scale 1 :index temp) delta))))
328 (unless (zerop amount)
329 (let ((delta (logandc2 (+ amount 7) 7)))
330 (inst add (make-ea :qword
332 (static-symbol-offset '*alien-stack*)
333 (ash symbol-value-slot word-shift)
334 (- other-pointer-lowtag)))
337 ;;; these are not strictly part of the c-call convention, but are
338 ;;; needed for the WITH-PRESERVED-POINTERS macro used for "locking
339 ;;; down" lisp objects so that GC won't move them while foreign
340 ;;; functions go to work.
342 (define-vop (push-word-on-c-stack)
343 (:translate push-word-on-c-stack)
344 (:args (val :scs (sap-reg)))
346 (:arg-types system-area-pointer)
350 (define-vop (pop-words-from-c-stack)
351 (:translate pop-words-from-c-stack)
353 (:arg-types (:constant (unsigned-byte 60)))
357 (inst add rsp-tn (fixnumize number))))