+;;; This file contains the MIPS specific runtime stuff.
+;;;
(in-package "SB!VM")
+
\f
(define-alien-type os-context-t (struct os-context-t-struct))
+(define-alien-type os-context-register-t unsigned-long-long)
+
\f
-;;;; MACHINE-TYPE and MACHINE-VERSION
+;;;; MACHINE-TYPE
(defun machine-type ()
"Returns a string describing the type of the local machine."
"MIPS")
-
-;;; support for CL:MACHINE-VERSION defined OAOO elsewhere
-(defun get-machine-version ()
- #!+little-endian "little-endian"
- #!-little-endian "big-endian")
\f
;;;; FIXUP-CODE-OBJECT
(defun fixup-code-object (code offset value kind)
+ (declare (type index offset))
(unless (zerop (rem offset n-word-bytes))
(error "Unaligned instruction? offset=#x~X." offset))
(sb!sys:without-gcing
- (let ((sap (truly-the system-area-pointer
- (%primitive sb!c::code-instructions code))))
+ (let ((sap (%primitive sb!c::code-instructions code)))
(ecase kind
(:jump
(aver (zerop (ash value -28)))
(setf (ldb (byte 26 0) (sap-ref-32 sap offset))
(ash value -2)))
(:lui
- (setf (sap-ref-16 sap
- #!+little-endian offset
- #!-little-endian (+ offset 2))
- (+ (ash value -16)
- (if (logbitp 15 value) 1 0))))
+ (setf (ldb (byte 16 0) (sap-ref-32 sap offset))
+ (ash (1+ (ash value -15)) -1)))
(:addi
- (setf (sap-ref-16 sap
- #!+little-endian offset
- #!-little-endian (+ offset 2))
+ (setf (ldb (byte 16 0) (sap-ref-32 sap offset))
(ldb (byte 16 0) value)))))))
\f
-(define-alien-routine ("os_context_pc_addr" context-pc-addr) (* unsigned-int)
- (context (* os-context-t)))
+(define-alien-routine ("os_context_pc_addr" context-pc-addr)
+ (* os-context-register-t)
+ (context (* os-context-t) :in))
(defun context-pc (context)
(declare (type (alien (* os-context-t)) context))
- ;; KLUDGE: this sucks, and furthermore will break on either of (a)
- ;; porting back to IRIX or (b) running on proper 64-bit support.
- ;; Linux on the MIPS defines its registers in the sigcontext as
- ;; 64-bit quantities ("unsigned long long"), presumably to be
- ;; binary-compatible with 64-bit mode. Since there appears not to
- ;; be ALIEN support for 64-bit return values, we have to do the
- ;; hacky pointer arithmetic thing. -- CSR, 2002-09-01
- (int-sap (deref (context-pc-addr context)
- #!-little-endian 1
- #!+little-endian 0)))
+ (int-sap (deref (context-pc-addr context))))
(define-alien-routine ("os_context_register_addr" context-register-addr)
- (* unsigned-int)
- (context (* os-context-t))
- (index int))
+ (* os-context-register-t)
+ (context (* os-context-t) :in)
+ (index int :in))
(define-alien-routine ("os_context_bd_cause" context-bd-cause-int)
- (unsigned 32)
- (context (* os-context-t)))
+ unsigned-int
+ (context (* os-context-t) :in))
;;; FIXME: Should this and CONTEXT-PC be INLINE to reduce consing?
;;; (Are they used in anything time-critical, or just the debugger?)
(defun context-register (context index)
(declare (type (alien (* os-context-t)) context))
- (deref (context-register-addr context index)
- #!-little-endian 1
- #!+little-endian 0))
+ (let ((addr (context-register-addr context index)))
+ (declare (type (alien (* os-context-register-t)) addr))
+ (deref addr)))
(defun %set-context-register (context index new)
(declare (type (alien (* os-context-t)) context))
- (setf (deref (context-register-addr context index)
- #!-little-endian 1
- #!+little-endian 0)
- new))
-
-#!+linux
-;;; For now.
-(defun context-floating-point-modes (context)
- (declare (ignore context))
- (warn "stub CONTEXT-FLOATING-POINT-MODES")
- 0)
+ (let ((addr (context-register-addr context index)))
+ (declare (type (alien (* os-context-register-t)) addr))
+ (setf (deref addr) new)))
+
+;;; This is like CONTEXT-REGISTER, but returns the value of a float
+;;; register. FORMAT is the type of float to return.
+
+;;; FIXME: Whether COERCE actually knows how to make a float out of a
+;;; long is another question. This stuff still needs testing.
+(define-alien-routine ("os_context_fpregister_addr" context-float-register-addr)
+ (* os-context-register-t)
+ (context (* os-context-t) :in)
+ (index int :in))
+
+(defun context-float-register (context index format)
+ (declare (type (alien (* os-context-t)) context))
+ (let ((addr (context-float-register-addr context index)))
+ (declare (type (alien (* os-context-register-t)) addr))
+ (coerce (deref addr) format)))
+
+(defun %set-context-float-register (context index format new)
+ (declare (type (alien (* os-context-t)) context))
+ (let ((addr (context-float-register-addr context index)))
+ (declare (type (alien (* os-context-register-t)) addr))
+ (setf (deref addr) (coerce new format))))
+
+(define-alien-routine
+ ("arch_get_fp_control" floating-point-modes) unsigned-int)
+
+(define-alien-routine
+ ("arch_set_fp_control" %floating-point-modes-setter) void (fp unsigned-int :in))
+
+(defun (setf floating-point-modes) (val) (%floating-point-modes-setter val))
+
+;;; Given a signal context, return the floating point modes word in
+;;; the same format as returned by FLOATING-POINT-MODES.
+(define-alien-routine ("os_context_fp_control" context-floating-point-modes)
+ unsigned-int
+ (context (* os-context-t) :in))
;;;; Internal-error-arguments.
;;; INTERNAL-ERROR-ARGUMENTS -- interface.
;;;
;;; Given the sigcontext, extract the internal error arguments from the
-;;; instruction stream.
-;;;
+;;; instruction stream. This is e.g.
+;;; 4 23 254 206 1 0 0 0
+;;; | ~~~~~~~~~~~~~~~~~~~~~~~~~
+;;; length data (everything is an octet)
+;;; (pc + 4)
(defun internal-error-args (context)
(declare (type (alien (* os-context-t)) context))
(/show0 "entering INTERNAL-ERROR-ARGS, CONTEXT=..")
(let ((pc (context-pc context))
(cause (context-bd-cause-int context)))
(declare (type system-area-pointer pc))
- (/show0 "got PC=..")
- (/hexstr (sap-int pc))
- ;; KLUDGE: This exposure of the branch delay mechanism hurts.
- (when (logbitp 31 cause)
- (setf pc (sap+ pc 4)))
- (when (= (sap-ref-8 pc 4) 255)
- (setf pc (sap+ pc 1)))
- (/show0 "now PC=..")
- (/hexstr (sap-int pc))
- (let* ((length (sap-ref-8 pc 4))
- (vector (make-array length :element-type '(unsigned-byte 8))))
- (declare (type (unsigned-byte 8) length)
- (type (simple-array (unsigned-byte 8) (*)) vector))
- (/show0 "LENGTH,VECTOR,ERROR-NUMBER=..")
- (/hexstr length)
- (/hexstr vector)
- (copy-ub8-from-system-area pc 5 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))
- (sc-offsets (sb!c:read-var-integer vector index)))
- (values error-number (sc-offsets)))))))
-
-
-
-
-
+ (multiple-value-bind (error-number length sc-offsets)
+ ;; KLUDGE: This exposure of the branch delay mechanism hurts.
+ (snarf-error-junk pc (if (logbitp 31 cause) 8 4))
+ (declare (ignore length))
+ (values error-number sc-offsets))))
projects / sbcl.git / blobdiff