1 ;;; This file contains the PPC specific runtime stuff.
5 (defvar *number-of-signals* 64)
6 (defvar *bits-per-word* 32)
8 (define-alien-type os-context-t (struct os-context-t-struct))
11 ;;;; MACHINE-TYPE and MACHINE-VERSION
13 (defun machine-type ()
14 "Returns a string describing the type of the local machine."
17 ;;; support for CL:MACHINE-VERSION defined OAOO elsewhere
18 (defun get-machine-version ()
20 (with-open-file (stream "/proc/cpuinfo"
21 ;; /proc is optional even in Linux, so
23 :if-does-not-exist nil)
24 (loop with line while (setf line (read-line stream nil))
25 ;; hoping "cpu" exists and gives something useful in
26 ;; all relevant Linuxen...
28 ;; from Lars Brinkhoff sbcl-devel 26 Jun 2003:
29 ;; I examined different versions of Linux/PPC at
30 ;; http://lxr.linux.no/ (the file that outputs
31 ;; /proc/cpuinfo is arch/ppc/kernel/setup.c, if
32 ;; you want to check), and all except 2.0.x
33 ;; seemed to do the same thing as far as the
34 ;; "cpu" field is concerned, i.e. it always
35 ;; starts with the (C-syntax) string "cpu\t\t: ".
36 when (eql (search "cpu" line) 0)
37 return (string-trim " " (subseq line (1+ (position #\: line))))))
41 ;;;; FIXUP-CODE-OBJECT
43 (defun fixup-code-object (code offset fixup kind)
44 (declare (type index offset))
45 (unless (zerop (rem offset n-word-bytes))
46 (error "Unaligned instruction? offset=#x~X." offset))
48 (let ((sap (truly-the system-area-pointer
49 (%primitive sb!kernel::code-instructions code))))
52 (error "Can't deal with CALL fixups, yet."))
54 (setf (ldb (byte 24 2) (sap-ref-32 sap offset))
57 (let* ((h (ldb (byte 16 16) fixup))
58 (l (ldb (byte 16 0) fixup)))
59 ; Compensate for possible sign-extension when the low half
60 ; is added to the high. We could avoid this by ORI-ing
61 ; the low half in 32-bit absolute loads, but it'd be
62 ; nice to be able to do:
65 ; and lwz/stw and friends all use a signed 16-bit offset.
66 (setf (ldb (byte 16 0) (sap-ref-32 sap offset))
67 (if (logbitp 15 l) (ldb (byte 16 0) (1+ h)) h))))
69 (setf (ldb (byte 16 0) (sap-ref-32 sap offset))
70 (ldb (byte 16 0) fixup)))))))
73 ;;;; "Sigcontext" access functions, cut & pasted from x86-vm.lisp then
74 ;;;; hacked for types.
76 (define-alien-routine ("os_context_pc_addr" context-pc-addr) (* unsigned-long)
77 (context (* os-context-t)))
79 (defun context-pc (context)
80 (declare (type (alien (* os-context-t)) context))
81 (int-sap (deref (context-pc-addr context))))
83 (define-alien-routine ("os_context_register_addr" context-register-addr)
85 (context (* os-context-t))
88 (defun context-register (context index)
89 (declare (type (alien (* os-context-t)) context))
90 (deref (context-register-addr context index)))
92 (defun %set-context-register (context index new)
93 (declare (type (alien (* os-context-t)) context))
94 (setf (deref (context-register-addr context index))
96 ;;; This is like CONTEXT-REGISTER, but returns the value of a float
97 ;;; register. FORMAT is the type of float to return.
99 ;;; FIXME: Whether COERCE actually knows how to make a float out of a
100 ;;; long is another question. This stuff still needs testing.
102 (define-alien-routine ("os_context_fpregister_addr" context-float-register-addr)
104 (context (* os-context-t))
107 (defun context-float-register (context index format)
108 (declare (type (alien (* os-context-t)) context))
109 (coerce (deref (context-float-register-addr context index)) format))
111 (defun %set-context-float-register (context index format new)
112 (declare (type (alien (* os-context-t)) context))
113 (setf (deref (context-float-register-addr context index))
114 (coerce new format)))
116 ;;; Given a signal context, return the floating point modes word in
117 ;;; the same format as returned by FLOATING-POINT-MODES.
118 (define-alien-routine ("os_context_fp_control" context-floating-point-modes)
119 (sb!alien:unsigned 32)
120 (context (* os-context-t)))
123 ;;;; INTERNAL-ERROR-ARGS.
125 ;;; GIVEN a (POSIX) signal context, extract the internal error
126 ;;; arguments from the instruction stream. This is e.g.
128 ;;; INTERNAL-ERROR-ARGS -- interface.
130 ;;; Given the sigcontext, extract the internal error arguments from the
131 ;;; instruction stream.
133 (defun internal-error-args (context)
134 (declare (type (alien (* os-context-t)) context))
135 (let* ((pc (context-pc context))
136 (bad-inst (sap-ref-32 pc 0))
137 (op (ldb (byte 16 16) bad-inst)))
138 (declare (type system-area-pointer pc))
139 (cond ((= op (logior (ash 3 10) (ash 6 5)))
140 (args-for-unimp-inst context))
141 ((and (= (ldb (byte 6 10) op) 3)
142 (= (ldb (byte 5 5) op) 24))
143 (let* ((regnum (ldb (byte 5 0) op))
144 (prev (sap-ref-32 (int-sap (- (sap-int pc) 4)) 0)))
145 (if (and (= (ldb (byte 6 26) prev) 3)
146 (= (ldb (byte 5 21) prev) 0))
147 (values (ldb (byte 16 0) prev)
148 (list (sb!c::make-sc-offset sb!vm:any-reg-sc-number
149 (ldb (byte 5 16) prev))))
150 (values #.(sb!kernel:error-number-or-lose
151 'sb!kernel:invalid-arg-count-error)
152 (list (sb!c::make-sc-offset sb!vm:any-reg-sc-number regnum))))))
155 (values #.(error-number-or-lose 'unknown-error) nil)))))
157 (defun args-for-unimp-inst (context)
158 (declare (type (alien (* os-context-t)) context))
159 (let* ((pc (context-pc context))
160 (length (sap-ref-8 pc 4))
161 (vector (make-array length :element-type '(unsigned-byte 8))))
162 (declare (type system-area-pointer pc)
163 (type (unsigned-byte 8) length)
164 (type (simple-array (unsigned-byte 8) (*)) vector))
165 (copy-from-system-area pc (* sb!vm:n-byte-bits 5)
166 vector (* sb!vm:n-word-bits
167 sb!vm:vector-data-offset)
168 (* length sb!vm:n-byte-bits))
170 (error-number (sb!c:read-var-integer vector index)))
171 (collect ((sc-offsets))
173 (when (>= index length)
175 (sc-offsets (sb!c:read-var-integer vector index)))
176 (values error-number (sc-offsets))))))