X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Fx86-vm.lisp;h=041007b78c6c300056a453f94a9b1b2643ecc407;hb=4898ef32c639b1c7f4ee13a5ba566ce6debd03e6;hp=353e1d8d0ee1b10693f9236710a667c86fd55286;hpb=416152f084604094445a758ff399871132dff2bd;p=sbcl.git diff --git a/src/code/x86-vm.lisp b/src/code/x86-vm.lisp index 353e1d8..041007b 100644 --- a/src/code/x86-vm.lisp +++ b/src/code/x86-vm.lisp @@ -13,7 +13,7 @@ ;;;; OS-CONTEXT-T -;;; a POSIX signal context, i.e. the type passed as the third +;;; a POSIX signal context, i.e. the type passed as the third ;;; argument to an SA_SIGACTION-style signal handler ;;; ;;; The real type does have slots, but at Lisp level, we never @@ -32,19 +32,34 @@ ;;; FIXME: Since SBCL, unlike CMU CL, uses this as an opaque type, ;;; it's no longer architecture-dependent, and probably belongs in ;;; some other package, perhaps SB-KERNEL. -(def-alien-type os-context-t (struct os-context-t-struct)) +(define-alien-type os-context-t (struct os-context-t-struct)) ;;;; MACHINE-TYPE and MACHINE-VERSION (defun machine-type () #!+sb-doc - "Returns a string describing the type of the local machine." + "Return a string describing the type of the local machine." "X86") -(defun machine-version () - #!+sb-doc - "Returns a string describing the version of the local machine." - "X86") +;;; arch-specific support for CL:MACHINE-VERSION, defined OAOO elsewhere +(defun get-machine-version () + #!+linux + (with-open-file (stream "/proc/cpuinfo" + ;; Even on Linux it's an option to build + ;; kernels without /proc filesystems, so + ;; degrade gracefully. + :if-does-not-exist nil) + (loop with line while (setf line (read-line stream nil)) + ;; The field "model name" exists on kernel 2.4.21-rc6-ac1 + ;; anyway, with values e.g. + ;; "AMD Athlon(TM) XP 2000+" + ;; "Intel(R) Pentium(R) M processor 1300MHz" + ;; which seem comparable to the information in the example + ;; in the MACHINE-VERSION page of the ANSI spec. + when (eql (search "model name" line) 0) + return (string-trim " " (subseq line (1+ (position #\: line)))))) + #!-linux + nil) ;;;; :CODE-OBJECT fixups @@ -52,6 +67,12 @@ (defvar *num-fixups* 0) ;;; FIXME: When the system runs, it'd be interesting to see what this is. +(declaim (inline adjust-fixup-array)) +(defun adjust-fixup-array (array size) + (let ((new (make-array size :element-type '(unsigned-byte 32)))) + (replace new array) + new)) + ;;; This gets called by LOAD to resolve newly positioned objects ;;; with things (like code instructions) that have to refer to them. ;;; @@ -60,111 +81,110 @@ (defun fixup-code-object (code offset fixup kind) (declare (type index offset)) (flet ((add-fixup (code offset) - ;; (We check for and ignore fixups for code objects in the - ;; read-only and static spaces. (In the old CMU CL code - ;; this check was conditional on *ENABLE-DYNAMIC-SPACE-CODE*, - ;; but in SBCL relocatable dynamic space code is always in - ;; use, so we always do the check.) - (incf *num-fixups*) - (let ((fixups (code-header-ref code code-constants-offset))) - (cond ((typep fixups '(simple-array (unsigned-byte 32) (*))) - (let ((new-fixups - (adjust-array fixups (1+ (length fixups)) - :element-type '(unsigned-byte 32)))) - (setf (aref new-fixups (length fixups)) offset) - (setf (code-header-ref code code-constants-offset) - new-fixups))) - (t - (unless (or (eq (get-type fixups) - sb!vm:unbound-marker-type) - (zerop fixups)) - (format t "** Init. code FU = ~S~%" fixups)) ; FIXME - (setf (code-header-ref code code-constants-offset) - (make-specializable-array - 1 - :element-type '(unsigned-byte 32) - :initial-element offset))))))) + ;; (We check for and ignore fixups for code objects in the + ;; read-only and static spaces. (In the old CMU CL code + ;; this check was conditional on *ENABLE-DYNAMIC-SPACE-CODE*, + ;; but in SBCL relocatable dynamic space code is always in + ;; use, so we always do the check.) + (incf *num-fixups*) + (let ((fixups (code-header-ref code code-constants-offset))) + (cond ((typep fixups '(simple-array (unsigned-byte 32) (*))) + (let ((new-fixups + (adjust-fixup-array fixups (1+ (length fixups))))) + (setf (aref new-fixups (length fixups)) offset) + (setf (code-header-ref code code-constants-offset) + new-fixups))) + (t + (unless (or (eq (widetag-of fixups) + unbound-marker-widetag) + (zerop fixups)) + (format t "** Init. code FU = ~S~%" fixups)) ; FIXME + (setf (code-header-ref code code-constants-offset) + (make-array + 1 + :element-type '(unsigned-byte 32) + :initial-element offset))))))) (sb!sys:without-gcing (let* ((sap (truly-the system-area-pointer - (sb!kernel:code-instructions code))) - (obj-start-addr (logand (sb!kernel:get-lisp-obj-address code) - #xfffffff8)) - #+nil (const-start-addr (+ obj-start-addr (* 5 4))) - (code-start-addr (sb!sys:sap-int (sb!kernel:code-instructions - code))) - (ncode-words (sb!kernel:code-header-ref code 1)) - (code-end-addr (+ code-start-addr (* ncode-words 4)))) + (sb!kernel:code-instructions code))) + (obj-start-addr (logand (sb!kernel:get-lisp-obj-address code) + #xfffffff8)) + ;; FIXME: what is this 5? + #+nil (const-start-addr (+ obj-start-addr (* 5 n-word-bytes))) + (code-start-addr (sb!sys:sap-int (sb!kernel:code-instructions + code))) + (ncode-words (sb!kernel:code-header-ref code 1)) + (code-end-addr (+ code-start-addr (* ncode-words n-word-bytes)))) (unless (member kind '(:absolute :relative)) - (error "Unknown code-object-fixup kind ~S." kind)) + (error "Unknown code-object-fixup kind ~S." kind)) (ecase kind - (:absolute - ;; Word at sap + offset contains a value to be replaced by - ;; adding that value to fixup. - (setf (sap-ref-32 sap offset) (+ fixup (sap-ref-32 sap offset))) - ;; Record absolute fixups that point within the code object. - (when (> code-end-addr (sap-ref-32 sap offset) obj-start-addr) - (add-fixup code offset))) - (:relative - ;; Fixup is the actual address wanted. - ;; - ;; Record relative fixups that point outside the code - ;; object. - (when (or (< fixup obj-start-addr) (> fixup code-end-addr)) - (add-fixup code offset)) - ;; Replace word with value to add to that loc to get there. - (let* ((loc-sap (+ (sap-int sap) offset)) - (rel-val (- fixup loc-sap 4))) - (declare (type (unsigned-byte 32) loc-sap) - (type (signed-byte 32) rel-val)) - (setf (signed-sap-ref-32 sap offset) rel-val)))))) + (:absolute + ;; Word at sap + offset contains a value to be replaced by + ;; adding that value to fixup. + (setf (sap-ref-32 sap offset) (+ fixup (sap-ref-32 sap offset))) + ;; Record absolute fixups that point within the code object. + (when (> code-end-addr (sap-ref-32 sap offset) obj-start-addr) + (add-fixup code offset))) + (:relative + ;; Fixup is the actual address wanted. + ;; + ;; Record relative fixups that point outside the code + ;; object. + (when (or (< fixup obj-start-addr) (> fixup code-end-addr)) + (add-fixup code offset)) + ;; Replace word with value to add to that loc to get there. + (let* ((loc-sap (+ (sap-int sap) offset)) + (rel-val (- fixup loc-sap n-word-bytes))) + (declare (type (unsigned-byte 32) loc-sap) + (type (signed-byte 32) rel-val)) + (setf (signed-sap-ref-32 sap offset) rel-val)))))) nil)) -;;; Add a code fixup to a code object generated by GENESIS. The fixup has -;;; already been applied, it's just a matter of placing the fixup in the code's -;;; fixup vector if necessary. +;;; Add a code fixup to a code object generated by GENESIS. The fixup +;;; has already been applied, it's just a matter of placing the fixup +;;; in the code's fixup vector if necessary. ;;; ;;; KLUDGE: I'd like a good explanation of why this has to be done at ;;; load time instead of in GENESIS. It's probably simple, I just haven't ;;; figured it out, or found it written down anywhere. -- WHN 19990908 #!+gencgc -(defun !do-load-time-code-fixup (code offset fixup kind) - (flet ((add-load-time-code-fixup (code offset) - (let ((fixups (code-header-ref code sb!vm:code-constants-offset))) - (cond ((typep fixups '(simple-array (unsigned-byte 32) (*))) - (let ((new-fixups - (adjust-array fixups (1+ (length fixups)) - :element-type '(unsigned-byte 32)))) - (setf (aref new-fixups (length fixups)) offset) - (setf (code-header-ref code sb!vm:code-constants-offset) - new-fixups))) - (t - (unless (or (eq (get-type fixups) - sb!vm:unbound-marker-type) - (zerop fixups)) - (sb!impl::!cold-lose "Argh! can't process fixup")) - (setf (code-header-ref code sb!vm:code-constants-offset) - (make-specializable-array - 1 - :element-type '(unsigned-byte 32) - :initial-element offset))))))) +(defun !envector-load-time-code-fixup (code offset fixup kind) + (flet ((frob (code offset) + (let ((fixups (code-header-ref code code-constants-offset))) + (cond ((typep fixups '(simple-array (unsigned-byte 32) (*))) + (let ((new-fixups + (adjust-fixup-array fixups (1+ (length fixups))))) + (setf (aref new-fixups (length fixups)) offset) + (setf (code-header-ref code code-constants-offset) + new-fixups))) + (t + (unless (or (eq (widetag-of fixups) + unbound-marker-widetag) + (zerop fixups)) + (sb!impl::!cold-lose "Argh! can't process fixup")) + (setf (code-header-ref code code-constants-offset) + (make-array + 1 + :element-type '(unsigned-byte 32) + :initial-element offset))))))) (let* ((sap (truly-the system-area-pointer - (sb!kernel:code-instructions code))) - (obj-start-addr - ;; FIXME: looks like (LOGANDC2 foo typebits) - (logand (sb!kernel:get-lisp-obj-address code) #xfffffff8)) - (code-start-addr (sb!sys:sap-int (sb!kernel:code-instructions - code))) - (ncode-words (sb!kernel:code-header-ref code 1)) - (code-end-addr (+ code-start-addr (* ncode-words 4)))) + (sb!kernel:code-instructions code))) + (obj-start-addr + ;; FIXME: looks like (LOGANDC2 foo typebits) + (logand (sb!kernel:get-lisp-obj-address code) #xfffffff8)) + (code-start-addr (sb!sys:sap-int (sb!kernel:code-instructions + code))) + (ncode-words (sb!kernel:code-header-ref code 1)) + (code-end-addr (+ code-start-addr (* ncode-words n-word-bytes)))) (ecase kind - (:absolute - ;; Record absolute fixups that point within the code object. - (when (> code-end-addr (sap-ref-32 sap offset) obj-start-addr) - (add-load-time-code-fixup code offset))) - (:relative - ;; Record relative fixups that point outside the code object. - (when (or (< fixup obj-start-addr) (> fixup code-end-addr)) - (add-load-time-code-fixup code offset))))))) + (:absolute + ;; Record absolute fixups that point within the code object. + (when (> code-end-addr (sap-ref-32 sap offset) obj-start-addr) + (frob code offset))) + (:relative + ;; Record relative fixups that point outside the code object. + (when (or (< fixup obj-start-addr) (> fixup code-end-addr)) + (frob code offset))))))) ;;;; low-level signal context access functions ;;;; @@ -183,7 +203,7 @@ ;;;; and internal error handling) the extra runtime cost should be ;;;; negligible. -(def-alien-routine ("os_context_pc_addr" context-pc-addr) (* unsigned-int) +(define-alien-routine ("os_context_pc_addr" context-pc-addr) (* unsigned-int) ;; (Note: Just as in CONTEXT-REGISTER-ADDR, we intentionally use an ;; 'unsigned *' interpretation for the 32-bit word passed to us by ;; the C code, even though the C code may think it's an 'int *'.) @@ -195,7 +215,7 @@ (declare (type (alien (* unsigned-int)) addr)) (int-sap (deref addr)))) -(def-alien-routine ("os_context_register_addr" context-register-addr) +(define-alien-routine ("os_context_register_addr" context-register-addr) (* unsigned-int) ;; (Note the mismatch here between the 'int *' value that the C code ;; may think it's giving us and the 'unsigned *' value that we @@ -235,6 +255,7 @@ ;;; Given a signal context, return the floating point modes word in ;;; the same format as returned by FLOATING-POINT-MODES. +#!-linux (defun context-floating-point-modes (context) ;; FIXME: As of sbcl-0.6.7 and the big rewrite of signal handling for ;; POSIXness and (at the Lisp level) opaque signal contexts, @@ -246,7 +267,7 @@ ;; old code for Linux: #+nil (let ((cw (slot (deref (slot context 'fpstate) 0) 'cw)) - (sw (slot (deref (slot context 'fpstate) 0) 'sw))) + (sw (slot (deref (slot context 'fpstate) 0) 'sw))) ;;(format t "cw = ~4X~%sw = ~4X~%" cw sw) ;; NOT TESTED -- Clear sticky bits to clear interrupt condition. (setf (slot (deref (slot context 'fpstate) 0) 'sw) (logandc2 sw #x3f)) @@ -255,51 +276,47 @@ (logior (ash (logand sw #xffff) 16) (logxor (logand cw #xffff) #x3f))) 0) + +#!+linux +(define-alien-routine ("os_context_fp_control" context-floating-point-modes) + (sb!alien:unsigned 32) + (context (* os-context-t))) -;;;; INTERNAL-ERROR-ARGUMENTS +;;;; INTERNAL-ERROR-ARGS ;;; Given a (POSIX) signal context, extract the internal error ;;; arguments from the instruction stream. -(defun internal-error-arguments (context) +(defun internal-error-args (context) (declare (type (alien (* os-context-t)) context)) - (/show0 "entering INTERNAL-ERROR-ARGUMENTS, CONTEXT=..") + (/show0 "entering INTERNAL-ERROR-ARGS, CONTEXT=..") (/hexstr context) (let ((pc (context-pc context))) (declare (type system-area-pointer pc)) (/show0 "got PC") ;; using INT3 the pc is .. INT3 code length bytes... (let* ((length (sap-ref-8 pc 1)) - (vector (make-array length :element-type '(unsigned-byte 8)))) + (vector (make-array length :element-type '(unsigned-byte 8)))) (declare (type (unsigned-byte 8) length) - (type (simple-array (unsigned-byte 8) (*)) vector)) + (type (simple-array (unsigned-byte 8) (*)) vector)) (/show0 "LENGTH,VECTOR,ERROR-NUMBER=..") (/hexstr length) (/hexstr vector) - (copy-from-system-area pc (* sb!vm:byte-bits 2) - vector (* sb!vm:word-bits - sb!vm:vector-data-offset) - (* length sb!vm:byte-bits)) + (copy-ub8-from-system-area pc 2 vector 0 length) (let* ((index 0) - (error-number (sb!c::read-var-integer vector index))) - (/hexstr error-number) - (collect ((sc-offsets)) - (loop - (/show0 "INDEX=..") - (/hexstr index) - (when (>= index length) - (return)) - (let ((sc-offset (sb!c::read-var-integer vector index))) - (/show0 "SC-OFFSET=..") - (/hexstr sc-offset) - (sc-offsets sc-offset))) - (values error-number (sc-offsets))))))) + (error-number (sb!c:read-var-integer vector index))) + (/hexstr error-number) + (collect ((sc-offsets)) + (loop + (/show0 "INDEX=..") + (/hexstr index) + (when (>= index length) + (return)) + (let ((sc-offset (sb!c:read-var-integer vector index))) + (/show0 "SC-OFFSET=..") + (/hexstr sc-offset) + (sc-offsets sc-offset))) + (values error-number (sc-offsets))))))) -;;; Do whatever is necessary to make the given code component -;;; executable. (This is a no-op on the x86.) -(defun sanctify-for-execution (component) - (declare (ignore component)) - nil) - ;;; This is used in error.lisp to insure that floating-point exceptions ;;; are properly trapped. The compiler translates this to a VOP. (defun float-wait () @@ -311,8 +328,8 @@ ;;; than the i387 load constant instructions to avoid consing in some ;;; cases. Note these are initialized by GENESIS as they are needed ;;; early. -(defvar *fp-constant-0s0*) -(defvar *fp-constant-1s0*) +(defvar *fp-constant-0f0*) +(defvar *fp-constant-1f0*) (defvar *fp-constant-0d0*) (defvar *fp-constant-1d0*) ;;; the long-float constants @@ -327,18 +344,10 @@ ;;; the current alien stack pointer; saved/restored for non-local exits (defvar *alien-stack*) -(defun sb!kernel::%instance-set-conditional (object slot test-value new-value) - (declare (type instance object) - (type index slot)) - #!+sb-doc - "Atomically compare object's slot value to test-value and if EQ store - new-value in the slot. The original value of the slot is returned." - (sb!kernel::%instance-set-conditional object slot test-value new-value)) - ;;; Support for the MT19937 random number generator. The update ;;; function is implemented as an assembly routine. This definition is ;;; transformed to a call to the assembly routine allowing its use in -;;; byte compiled code. +;;; interpreted code. (defun random-mt19937 (state) (declare (type (simple-array (unsigned-byte 32) (627)) state)) (random-mt19937 state))