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 (defun machine-version ()
18 "Returns a string describing the version of the local machine."
23 ;;;; FIXUP-CODE-OBJECT
25 (defun fixup-code-object (code offset fixup kind
)
26 (declare (type index offset
))
27 (unless (zerop (rem offset n-word-bytes
))
28 (error "Unaligned instruction? offset=#x~X." offset
))
30 (let ((sap (truly-the system-area-pointer
31 (%primitive sb
!kernel
::code-instructions code
))))
34 (error "Can't deal with CALL fixups, yet."))
36 (setf (ldb (byte 24 2) (sap-ref-32 sap offset
))
39 (let* ((h (ldb (byte 16 16) fixup
))
40 (l (ldb (byte 16 0) fixup
)))
41 ; Compensate for possible sign-extension when the low half
42 ; is added to the high. We could avoid this by ORI-ing
43 ; the low half in 32-bit absolute loads, but it'd be
44 ; nice to be able to do:
47 ; and lwz/stw and friends all use a signed 16-bit offset.
48 (setf (ldb (byte 16 0) (sap-ref-32 sap offset
))
49 (if (logbitp 15 l
) (ldb (byte 16 0) (1+ h
)) h
))))
51 (setf (ldb (byte 16 0) (sap-ref-32 sap offset
))
52 (ldb (byte 16 0) fixup
)))))))
55 ;;;; "Sigcontext" access functions, cut & pasted from x86-vm.lisp then
56 ;;;; hacked for types.
58 (define-alien-routine ("os_context_pc_addr" context-pc-addr
) (* unsigned-long
)
59 (context (* os-context-t
)))
61 (defun context-pc (context)
62 (declare (type (alien (* os-context-t
)) context
))
63 (int-sap (deref (context-pc-addr context
))))
65 (define-alien-routine ("os_context_register_addr" context-register-addr
)
67 (context (* os-context-t
))
70 (defun context-register (context index
)
71 (declare (type (alien (* os-context-t
)) context
))
72 (deref (context-register-addr context index
)))
74 (defun %set-context-register
(context index new
)
75 (declare (type (alien (* os-context-t
)) context
))
76 (setf (deref (context-register-addr context index
))
78 ;;; This is like CONTEXT-REGISTER, but returns the value of a float
79 ;;; register. FORMAT is the type of float to return.
81 ;;; FIXME: Whether COERCE actually knows how to make a float out of a
82 ;;; long is another question. This stuff still needs testing.
84 (define-alien-routine ("os_context_fpregister_addr" context-float-register-addr
)
86 (context (* os-context-t
))
89 (defun context-float-register (context index format
)
90 (declare (type (alien (* os-context-t
)) context
))
91 (coerce (deref (context-float-register-addr context index
)) format
))
93 (defun %set-context-float-register
(context index format new
)
94 (declare (type (alien (* os-context-t
)) context
))
95 (setf (deref (context-float-register-addr context index
))
98 ;;; Given a signal context, return the floating point modes word in
99 ;;; the same format as returned by FLOATING-POINT-MODES.
100 (define-alien-routine ("os_context_fp_control" context-floating-point-modes
)
101 (sb!alien
:unsigned
32)
102 (context (* os-context-t
)))
105 ;;;; INTERNAL-ERROR-ARGS.
107 ;;; GIVEN a (POSIX) signal context, extract the internal error
108 ;;; arguments from the instruction stream. This is e.g.
110 ;;; INTERNAL-ERROR-ARGS -- interface.
112 ;;; Given the sigcontext, extract the internal error arguments from the
113 ;;; instruction stream.
115 (defun internal-error-args (context)
116 (declare (type (alien (* os-context-t
)) context
))
117 (let* ((pc (context-pc context
))
118 (bad-inst (sap-ref-32 pc
0))
119 (op (ldb (byte 16 16) bad-inst
)))
120 (declare (type system-area-pointer pc
))
121 (cond ((= op
(logior (ash 3 10) (ash 6 5)))
122 (args-for-unimp-inst context
))
123 ((and (= (ldb (byte 6 10) op
) 3)
124 (= (ldb (byte 5 5) op
) 24))
125 (let* ((regnum (ldb (byte 5 0) op
))
126 (prev (sap-ref-32 (int-sap (- (sap-int pc
) 4)) 0)))
127 (if (and (= (ldb (byte 6 26) prev
) 3)
128 (= (ldb (byte 5 21) prev
) 0))
129 (values (ldb (byte 16 0) prev
)
130 (list (sb!c
::make-sc-offset sb
!vm
:any-reg-sc-number
131 (ldb (byte 5 16) prev
))))
132 (values #.
(sb!kernel
:error-number-or-lose
133 'sb
!kernel
:invalid-arg-count-error
)
134 (list (sb!c
::make-sc-offset sb
!vm
:any-reg-sc-number regnum
))))))
137 (values #.
(error-number-or-lose 'unknown-error
) nil
)))))
139 (defun args-for-unimp-inst (context)
140 (declare (type (alien (* os-context-t
)) context
))
141 (let* ((pc (context-pc context
))
142 (length (sap-ref-8 pc
4))
143 (vector (make-array length
:element-type
'(unsigned-byte 8))))
144 (declare (type system-area-pointer pc
)
145 (type (unsigned-byte 8) length
)
146 (type (simple-array (unsigned-byte 8) (*)) vector
))
147 (copy-from-system-area pc
(* sb
!vm
:n-byte-bits
5)
148 vector
(* sb
!vm
:n-word-bits
149 sb
!vm
:vector-data-offset
)
150 (* length sb
!vm
:n-byte-bits
))
152 (error-number (sb!c
:read-var-integer vector index
)))
153 (collect ((sc-offsets))
155 (when (>= index length
)
157 (sc-offsets (sb!c
:read-var-integer vector index
)))
158 (values error-number
(sc-offsets))))))