X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;ds=sidebyside;f=src%2Fcompiler%2Fx86%2Fparms.lisp;h=ec89f340f6e1f11b7f4f667405777c2219c1ebf5;hb=a189a69454ef7635149319ae213b337f17c50d20;hp=29b4dfed3168e31954fc95eab9b9e72c8caea69a;hpb=8fc5fda05f92d69c95b47e4ad7561d91dab18c3e;p=sbcl.git diff --git a/src/compiler/x86/parms.lisp b/src/compiler/x86/parms.lisp index 29b4dfe..ec89f34 100644 --- a/src/compiler/x86/parms.lisp +++ b/src/compiler/x86/parms.lisp @@ -13,9 +13,6 @@ (in-package "SB!VM") -(file-comment - "$Header$") - ;;; ### Note: we simultaneously use ``word'' to mean a 32 bit quantity ;;; and a 16 bit quantity depending on context. This is because Intel ;;; insists on calling 16 bit things words and 32 bit things @@ -27,136 +24,201 @@ ;;;; machine architecture parameters -(eval-when (:compile-toplevel :load-toplevel :execute) - -(defconstant word-bits 32 - #!+sb-doc - "Number of bits per word where a word holds one lisp descriptor.") - -(defconstant byte-bits 8 - #!+sb-doc - "Number of bits per byte where a byte is the smallest addressable object.") - -(defconstant word-shift (1- (integer-length (/ word-bits byte-bits))) - #!+sb-doc - "Number of bits to shift between word addresses and byte addresses.") - -(defconstant word-bytes (/ word-bits byte-bits) - #!+sb-doc - "Number of bytes in a word.") - -) ; EVAL-WHEN - -(eval-when (:compile-toplevel :load-toplevel :execute) -(defconstant float-sign-shift 31) - -;; These values were taken from the alpha code. The values for -;; bias and exponent min/max are not the same as shown in the 486 book. -;; They may be correct for how Python uses them. -(defconstant single-float-bias 126) ; Intel says 127 -(defconstant single-float-exponent-byte (byte 8 23)) -(defconstant single-float-significand-byte (byte 23 0)) -;; The 486 book shows the exponent range -126 to +127. The Lisp -;; code that uses these values seems to want already biased numbers. -(defconstant single-float-normal-exponent-min 1) -(defconstant single-float-normal-exponent-max 254) -(defconstant single-float-hidden-bit (ash 1 23)) -(defconstant single-float-trapping-nan-bit (ash 1 22)) - -(defconstant double-float-bias 1022) -(defconstant double-float-exponent-byte (byte 11 20)) -(defconstant double-float-significand-byte (byte 20 0)) -(defconstant double-float-normal-exponent-min 1) -(defconstant double-float-normal-exponent-max #x7FE) -(defconstant double-float-hidden-bit (ash 1 20)) -(defconstant double-float-trapping-nan-bit (ash 1 19)) - -(defconstant long-float-bias 16382) -(defconstant long-float-exponent-byte (byte 15 0)) -(defconstant long-float-significand-byte (byte 31 0)) -(defconstant long-float-normal-exponent-min 1) -(defconstant long-float-normal-exponent-max #x7FFE) -(defconstant long-float-hidden-bit (ash 1 31)) ; Actually not hidden -(defconstant long-float-trapping-nan-bit (ash 1 30)) - -(defconstant single-float-digits +;;; the 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) + +;;; the number of bits per byte, where a byte is the smallest +;;; addressable object +(def!constant n-byte-bits 8) + +;;; The minimum immediate offset in a memory-referencing instruction. +(def!constant minimum-immediate-offset (- (expt 2 31))) + +;;; The maximum immediate offset in a memory-referencing instruction. +(def!constant maximum-immediate-offset (1- (expt 2 31))) + +(def!constant float-sign-shift 31) + +;;; comment from CMU CL: +;;; These values were taken from the alpha code. The values for +;;; bias and exponent min/max are not the same as shown in the 486 book. +;;; They may be correct for how Python uses them. +(def!constant single-float-bias 126) ; Intel says 127. +(defconstant-eqx single-float-exponent-byte (byte 8 23) #'equalp) +(defconstant-eqx single-float-significand-byte (byte 23 0) #'equalp) +;;; comment from CMU CL: +;;; The 486 book shows the exponent range -126 to +127. The Lisp +;;; code that uses these values seems to want already biased numbers. +(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 long-float-bias 16382) +(defconstant-eqx long-float-exponent-byte (byte 15 0) #'equalp) +(defconstant-eqx long-float-significand-byte (byte 31 0) #'equalp) +(def!constant long-float-normal-exponent-min 1) +(def!constant long-float-normal-exponent-max #x7FFE) +(def!constant long-float-hidden-bit (ash 1 31)) ; actually not hidden +(def!constant long-float-trapping-nan-bit (ash 1 30)) + +(def!constant single-float-digits (+ (byte-size single-float-significand-byte) 1)) -(defconstant double-float-digits - (+ (byte-size double-float-significand-byte) word-bits 1)) - -(defconstant long-float-digits - (+ (byte-size long-float-significand-byte) word-bits 1)) - -;;; pfw -- from i486 microprocessor programmers reference manual -(defconstant float-invalid-trap-bit (ash 1 0)) -(defconstant float-denormal-trap-bit (ash 1 1)) -(defconstant float-divide-by-zero-trap-bit (ash 1 2)) -(defconstant float-overflow-trap-bit (ash 1 3)) -(defconstant float-underflow-trap-bit (ash 1 4)) -(defconstant float-inexact-trap-bit (ash 1 5)) - -(defconstant float-round-to-nearest 0) -(defconstant float-round-to-negative 1) -(defconstant float-round-to-positive 2) -(defconstant float-round-to-zero 3) - -(defconstant float-rounding-mode (byte 2 10)) -(defconstant float-sticky-bits (byte 6 16)) -(defconstant float-traps-byte (byte 6 0)) -(defconstant float-exceptions-byte (byte 6 16)) -(defconstant float-precision-control (byte 2 8)) -(defconstant float-fast-bit 0) ; No fast mode on x86 - -); EVAL-WHEN +(def!constant double-float-digits + (+ (byte-size double-float-significand-byte) n-word-bits 1)) + +(def!constant long-float-digits + (+ (byte-size long-float-significand-byte) n-word-bits 1)) + +;;; pfw -- from i486 microprocessor programmer's reference manual +(def!constant float-invalid-trap-bit (ash 1 0)) +(def!constant float-denormal-trap-bit (ash 1 1)) +(def!constant float-divide-by-zero-trap-bit (ash 1 2)) +(def!constant float-overflow-trap-bit (ash 1 3)) +(def!constant float-underflow-trap-bit (ash 1 4)) +(def!constant float-inexact-trap-bit (ash 1 5)) + +(def!constant float-round-to-nearest 0) +(def!constant float-round-to-negative 1) +(def!constant float-round-to-positive 2) +(def!constant float-round-to-zero 3) + +(def!constant float-precision-24-bit 0) +(def!constant float-precision-53-bit 2) +(def!constant float-precision-64-bit 3) + +(defconstant-eqx float-rounding-mode (byte 2 10) #'equalp) +(defconstant-eqx float-sticky-bits (byte 6 16) #'equalp) +(defconstant-eqx float-traps-byte (byte 6 0) #'equalp) +(defconstant-eqx float-exceptions-byte (byte 6 16) #'equalp) +(defconstant-eqx float-precision-control (byte 2 8) #'equalp) +(def!constant float-fast-bit 0) ; no fast mode on x86 ;;;; description of the target address space ;;; where to put the different spaces ;;; -;;; FIXME: Couldn't/shouldn't these be DEFCONSTANT instead of DEFPARAMETER? -#!-linux (defparameter *target-read-only-space-start* #x10000000) -#!-linux (defparameter *target-static-space-start* - ;; FIXME: was #x28000000 until RAW's RUN-PROGRAM - ;; patches, why the change? - #x30000000) -#!-linux (defparameter *target-dynamic-space-start* #x48000000) -#!+linux (defparameter *target-read-only-space-start* #x01000000) -#!+linux (defparameter *target-static-space-start* #x05000000) -#!+linux (defparameter *target-dynamic-space-start* #x09000000) +;;; Note: Mostly these values are black magic, inherited from CMU CL +;;; without any documentation. However, there were a few explanatory +;;; comments in the CMU CL sources: +;;; * On Linux, +;;; ** The space 0x08000000-0x10000000 is "C program and memory allocation". +;;; ** The space 0x40000000-0x48000000 is reserved for shared libs. +;;; ** The space >0xE0000000 is "C stack - Alien stack". +;;; * On FreeBSD, +;;; ** The space 0x0E000000-0x10000000 is "Foreign segment". +;;; ** The space 0x20000000-0x30000000 is reserved for shared libs. +;;; And there have been some changes since the fork from CMU CL: +;;; * The OpenBSD port is new since the fork. We started with +;;; the FreeBSD address map, which actually worked until the +;;; Alpha port patches, for reasons which in retrospect are rather +;;; mysterious. After the Alpha port patches were added, the +;;; OpenBSD port suffered memory corruption problems. While +;;; debugging those, it was discovered that src/runtime/trymap +;;; failed for the control stack region #x40000000-#x47fff000. +;;; After the control stack was moved upward out of this region +;;; (stealing some bytes from dynamic space) the problems went +;;; away. +;;; * The FreeBSD STATIC-SPACE-START value was bumped up from +;;; #x28000000 to #x30000000 when FreeBSD ld.so dynamic linking +;;; support was added for FreeBSD ca. 20000910. This was to keep from +;;; stomping on an address range that the dynamic libraries want to +;;; use. (They want to use this address range even if we try to +;;; reserve it with a call to validate() as the first operation in +;;; main().) +;;; * For NetBSD 2.0, the following ranges are used by normal +;;; executables and mmap: +;;; ** Executables are (by default) loaded at 0x08048000. +;;; ** The break for the sbcl runtime seems to end around 0x08400000 +;;; We set read only space around 0x20000000, static +;;; space around 0x30000000, all ending below 0x37fff000 +;;; ** ld.so and other mmap'ed stuff like shared libs start around +;;; 0x48000000 +;;; We set dynamic space between 0x60000000 and 0x98000000 +;;; ** Bottom of the stack is typically not below 0xb0000000 +;;; FYI, this can be looked at with the "pmap" program, and if you +;;; set the top-down mmap allocation option in the kernel (not yet +;;; the default), all bets are totally off! +;;; * For FreeBSD, the requirement of user and kernel space are +;;; getting larger, and users tend to extend them. +;;; If MAXDSIZ is extended from 512MB to 1GB, we can't use up to +;;; around 0x50000000. +;;; And if KVA_PAGES is extended from 1GB to 1.5GB, we can't use +;;; down to around 0xA0000000. +;;; So we use 0x58000000--0x98000000 for dynamic space. +;;; * OpenBSD address space changes for W^X as well as malloc() +;;; randomization made the old addresses unsafe. +;;; ** By default (linked without -Z option): +;;; The executable's text segment starts at #x1c000000 and the +;;; data segment MAXDSIZ bytes higher, at #x3c000000. Shared +;;; library text segments start randomly between #x00002000 and +;;; #x10002000, with the data segment MAXDSIZ bytes after that. +;;; ** If the -Z linker option is used: +;;; The executable's text and data segments simply start at +;;; #x08048000, data immediately following text. Shared library +;;; text and data is placed as if allocated by malloc(). +;;; ** In both cases, the randomized range for malloc() starts +;;; MAXDSIZ bytes after the end of the data segment (#x48048000 +;;; with -Z, #x7c000000 without), and extends 256 MB. +;;; ** The read only, static, and linkage table spaces should be +;;; safe with and without -Z if they are located just before +;;; #x1c000000. +;;; ** Ideally the dynamic space should be at #x94000000, 64 MB +;;; after the end of the highest random malloc() address. +;;; Unfortunately the dynamic space must be in the lower half +;;; of the address space, where there are no large areas which +;;; are unused both with and without -Z. So we break -Z by +;;; starting at #x40000000. By only using 512 - 64 MB we can +;;; run under the default 512 MB data size resource limit. + +;;; NetBSD configuration used to have this comment regarding the linkage +;;; table: "In CMUCL: 0xB0000000->0xB1000000" + +#!+win32 (!gencgc-space-setup #x22000000 nil nil #x10000) +#!+linux (!gencgc-space-setup #x01000000 #x09000000) +#!+sunos (!gencgc-space-setup #x20000000 #x48000000) +#!+freebsd (!gencgc-space-setup #x01000000 #x58000000) +#!+openbsd (!gencgc-space-setup #x1b000000 #x40000000) +#!+netbsd (!gencgc-space-setup #x20000000 #x60000000) +#!+darwin (!gencgc-space-setup #x04000000 #x10000000) + +;;; Size of one linkage-table entry in bytes. +(def!constant linkage-table-entry-size 8) ;;; Given that NIL is the first thing allocated in static space, we ;;; know its value at compile time: -(defparameter *nil-value* (+ *target-static-space-start* #xb)) +(def!constant nil-value (+ static-space-start #xb)) ;;;; other miscellaneous constants -(defenum (:suffix -trap :start 8) - halt - pending-interrupt - error - cerror - breakpoint - function-end-breakpoint - single-step-breakpoint) -;;; FIXME: It'd be nice to replace all the DEFENUMs with something -;;; a la -;;; (WITH-DEF-ENUM (:START 8) -;;; (DEF-ENUM HALT-TRAP) -;;; (DEF-ENUM PENDING-INTERRUPT-TRAP) -;;; ..) -;;; for the benefit of anyone doing a lexical search for definitions -;;; of these symbols. - -(defenum (:prefix object-not- :suffix -trap :start 16) - list - instance) - -(defenum (:prefix trace-table-) - normal - call-site - function-prologue - function-epilogue) +(defenum (:start 8) + halt-trap + pending-interrupt-trap + error-trap + cerror-trap + breakpoint-trap + fun-end-breakpoint-trap + single-step-around-trap + single-step-before-trap) + +(defenum (:start 24) + object-not-list-trap + object-not-instance-trap + #!+sb-safepoint global-safepoint-trap + #!+sb-safepoint csp-safepoint-trap) ;;;; static symbols @@ -172,90 +234,45 @@ ;;; Note these spaces grow from low to high addresses. (defvar *allocation-pointer*) (defvar *binding-stack-pointer*) -(defvar *x86-cgc-active-p*) ; FIXME: Document this. -(defvar *static-blue-bag* nil) -;;; FIXME: *!INITIAL-FDEFN-OBJECTS* and !COLD-INIT probably don't need -;;; to be in the static symbols table any more. Also, if -;;; *INTERNAL-GC-TRIGGER* really is not used, we can punt it. (defparameter *static-symbols* - '(t - - ;; The C startup code must fill these in. - *posix-argv* - sb!impl::*!initial-fdefn-objects* - - ;; functions that the C code needs to call - sb!impl::!cold-init - sb!impl::maybe-gc - sb!kernel::internal-error - sb!di::handle-breakpoint - sb!impl::fdefinition-object - - ;; free pointers - sb!impl::*read-only-space-free-pointer* - sb!impl::*static-space-free-pointer* - sb!impl::*initial-dynamic-space-free-pointer* - - ;; things needed for non-local exit - sb!impl::*current-catch-block* - sb!impl::*current-unwind-protect-block* - sb!c::*eval-stack-top* - sb!vm::*alien-stack* - - ;; interrupt handling - sb!impl::*pseudo-atomic-atomic* - sb!impl::*pseudo-atomic-interrupted* - sb!unix::*interrupts-enabled* - sb!unix::*interrupt-pending* - sb!impl::*free-interrupt-context-index* - - sb!vm::*allocation-pointer* - sb!vm::*binding-stack-pointer* - sb!vm::*internal-gc-trigger* ; Not used. - - ;; the floating point constants - sb!vm::*fp-constant-0d0* - sb!vm::*fp-constant-1d0* - sb!vm::*fp-constant-0s0* - sb!vm::*fp-constant-1s0* - ;; The following are all long-floats. - sb!vm::*fp-constant-0l0* - sb!vm::*fp-constant-1l0* - sb!vm::*fp-constant-pi* - sb!vm::*fp-constant-l2t* - sb!vm::*fp-constant-l2e* - sb!vm::*fp-constant-lg2* - sb!vm::*fp-constant-ln2* - - ;; used by gencgc - sb!vm::*scavenge-read-only-space* - - ;; multi-process support - sb!vm::*control-stacks* - - ;; The ..SLOT-UNBOUND.. symbol is static in order to optimise the - ;; common slot unbound check. - sb!pcl::..slot-unbound.. - - ;; spare symbols - sb!vm::spare-10 - sb!vm::spare-9 - sb!vm::spare-8 - sb!vm::spare-7 - sb!vm::spare-6 - sb!vm::spare-5 - sb!vm::spare-4 - sb!vm::spare-3 - sb!vm::spare-2 - sb!vm::spare-1 - - ;; used by cgc - sb!vm::*x86-cgc-active-p* - sb!vm::*static-blue-bag* ; must be last or change C code - )) - -(defparameter *static-functions* + (append + *common-static-symbols* + *c-callable-static-symbols* + '(*alien-stack* + + ;; interrupt handling + *pseudo-atomic-bits* + + *allocation-pointer* + *binding-stack-pointer* + + ;; the floating point constants + *fp-constant-0d0* + *fp-constant-1d0* + *fp-constant-0f0* + *fp-constant-1f0* + ;; The following are all long-floats. + *fp-constant-0l0* + *fp-constant-1l0* + *fp-constant-pi* + *fp-constant-l2t* + *fp-constant-l2e* + *fp-constant-lg2* + *fp-constant-ln2* + + ;; For GC-AND-SAVE + *restart-lisp-function* + + ;; Needed for callbacks to work across saving cores. see + ;; ALIEN-CALLBACK-ASSEMBLER-WRAPPER in c-call.lisp for gory + ;; details. + sb!alien::*enter-alien-callback* + + ;; see comments in ../x86-64/parms.lisp + sb!pcl::..slot-unbound..))) + +(defparameter *static-funs* '(length sb!kernel:two-arg-+ sb!kernel:two-arg-- @@ -270,10 +287,8 @@ sb!kernel:two-arg-ior sb!kernel:two-arg-xor sb!kernel:two-arg-gcd - sb!kernel:two-arg-lcm)) + sb!kernel:two-arg-lcm + sb!kernel:%coerce-callable-to-fun)) -;;;; stuff added by jrd - -;;; FIXME: Is this used? Delete it or document it. -;;; cf the sparc PARMS.LISP -(defparameter *assembly-unit-length* 8) +#!+win32 +(defconstant +win32-tib-arbitrary-field-offset+ #.(+ #xE10 (* 4 63)))