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parms.lisp    179 lines (144 with data), 5.3 kB

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(in-package "SB!VM")
;;; number of bits per word where a word holds one lisp descriptor
(def!constant n-word-bits 32)
;;; the natural width of a machine word (as seen in e.g. register width,
;;; address space)
(def!constant n-machine-word-bits 32)
;;; number of bits per byte where a byte is the smallest addressable
;;; object
(def!constant n-byte-bits 8)
(def!constant float-sign-shift 31)
(def!constant single-float-bias 126)
(defconstant-eqx single-float-exponent-byte (byte 8 23) #'equalp)
(defconstant-eqx single-float-significand-byte (byte 23 0) #'equalp)
(def!constant single-float-normal-exponent-min 1)
(def!constant single-float-normal-exponent-max 254)
(def!constant single-float-hidden-bit (ash 1 23))
(def!constant single-float-trapping-nan-bit (ash 1 22))
(def!constant double-float-bias 1022)
(defconstant-eqx double-float-exponent-byte (byte 11 20) #'equalp)
(defconstant-eqx double-float-significand-byte (byte 20 0) #'equalp)
(def!constant double-float-normal-exponent-min 1)
(def!constant double-float-normal-exponent-max #x7FE)
(def!constant double-float-hidden-bit (ash 1 20))
(def!constant double-float-trapping-nan-bit (ash 1 19))
(def!constant single-float-digits
(+ (byte-size single-float-significand-byte) 1))
(def!constant double-float-digits
(+ (byte-size double-float-significand-byte) n-word-bits 1))
(def!constant float-inexact-trap-bit (ash 1 0))
(def!constant float-underflow-trap-bit (ash 1 1))
(def!constant float-overflow-trap-bit (ash 1 2))
(def!constant float-divide-by-zero-trap-bit (ash 1 3))
(def!constant float-invalid-trap-bit (ash 1 4))
(def!constant float-round-to-nearest 0)
(def!constant float-round-to-zero 1)
(def!constant float-round-to-positive 2)
(def!constant float-round-to-negative 3)
(defconstant-eqx float-rounding-mode (byte 2 0) #'equalp)
(defconstant-eqx float-sticky-bits (byte 5 2) #'equalp)
(defconstant-eqx float-traps-byte (byte 5 7) #'equalp)
(defconstant-eqx float-exceptions-byte (byte 5 12) #'equalp)
(defconstant-eqx float-condition-bit (ash 1 23) #'equalp)
(def!constant float-fast-bit 0) ; No fast mode on PMAX.
;;;; Description of the target address space.
#!+irix
(progn
;; Where to put the different spaces.
;; Old definitions, might be still relevant for an IRIX port.
;;
(def!constant read-only-space-start #x01000000)
(def!constant read-only-space-end #x05000000)
(def!constant static-space-start #x06000000)
(def!constant static-space-end #x08000000)
(def!constant dynamic-0-space-start #x08000000)
(def!constant dynamic-0-space-end #x0c000000)
(def!constant dynamic-1-space-start #x0c000000)
(def!constant dynamic-1-space-end #x10000000))
#!+linux
(progn
;; Where to put the address spaces on Linux.
;;
;; C runtime executable segment starts at 0x00400000
(def!constant read-only-space-start #x01000000)
(def!constant read-only-space-end #x08000000)
(def!constant static-space-start #x08000000)
(def!constant static-space-end #x10000000)
;; C runtime read/write segment starts at 0x10000000, heap and DSOs
;; start at 0x2a000000
(def!constant dynamic-0-space-start #x30000000)
(def!constant dynamic-0-space-end #x50000000)
(def!constant dynamic-1-space-start #x50000000)
(def!constant dynamic-1-space-end #x70000000)
;; C stack grows downward from 0x80000000
)
;;;; Other non-type constants.
(defenum (:suffix -flag)
atomic
interrupted)
(defenum (:suffix -trap :start 8)
halt
pending-interrupt
error
cerror
breakpoint
fun-end-breakpoint
after-breakpoint)
(defenum (:prefix trace-table-)
normal
call-site
fun-prologue
fun-epilogue)
;;;; Static symbols.
;;; Static symbols are loaded into static space directly after NIL so
;;; that the system can compute their address by adding a constant
;;; amount to NIL.
;;;
;;; The fdefn objects for the static functions are loaded into static
;;; space directly after the static symbols. That way, the raw-addr
;;; can be loaded directly out of them by indirecting relative to NIL.
;;;
(defparameter *static-symbols*
'(t
*posix-argv*
sb!impl::sub-gc
sb!kernel::internal-error
sb!kernel::control-stack-exhausted-error
sb!kernel::undefined-alien-variable-error
sb!kernel::undefined-alien-function-error
sb!di::handle-breakpoint
sb!impl::fdefinition-object
;; Free Pointers
*read-only-space-free-pointer*
*static-space-free-pointer*
*initial-dynamic-space-free-pointer*
;; Things needed for non-local-exit.
*current-catch-block*
*current-unwind-protect-block*
*binding-stack-start*
*control-stack-start*
*control-stack-end*
;; Interrupt Handling
*free-interrupt-context-index*
sb!unix::*interrupts-enabled*
sb!unix::*interrupt-pending*
))
(defparameter *static-funs*
'(sb!kernel:two-arg-+
sb!kernel:two-arg--
sb!kernel:two-arg-*
sb!kernel:two-arg-/
sb!kernel:two-arg-<
sb!kernel:two-arg->
sb!kernel:two-arg-=
sb!kernel:two-arg-<=
sb!kernel:two-arg->=
sb!kernel:two-arg-/=
eql
sb!kernel:%negate
sb!kernel:two-arg-and
sb!kernel:two-arg-ior
sb!kernel:two-arg-xor
length
sb!kernel:two-arg-gcd
sb!kernel:two-arg-lcm))