Raymond Toy pushed to branch issue-97-define-ud2-inst at cmucl / cmucl
Commits: f8abdf9a by Raymond Toy at 2021-04-07T17:36:51-07:00 Use UD1 instead of UD2
The definition of BTC and friends conflicted with UD1, so fix that. Without this, our UD1 instruction got printed out as BTC.
Update x86-arch to look for ud1 instead of ud2.
- - - - -
2 changed files:
- src/compiler/x86/insts.lisp - src/lisp/x86-arch.c
Changes:
===================================== src/compiler/x86/insts.lisp ===================================== @@ -1778,8 +1778,8 @@ (disassem:define-instruction-format (bit-test-reg/mem 24 :default-printer '(:name :tab reg/mem ", " reg)) - (prefix :field (byte 8 0) :value #b0001111) - (op :field (byte 3 11)) + (prefix :field (byte 8 0) :value #b0001111) + (op :field (byte 8 8)) ;;(test :fields (list (byte 2 14) (byte 3 8))) (reg/mem :fields (list (byte 2 22) (byte 3 16)) :type 'reg/mem) @@ -1788,22 +1788,22 @@ (imm))
(define-instruction bt (segment src index) - (:printer bit-test-reg/mem ((op #b100))) + (:printer bit-test-reg/mem ((op #b10100011))) (:emitter (emit-bit-test-and-mumble segment src index #b100)))
(define-instruction btc (segment src index) - (:printer bit-test-reg/mem ((op #b111))) + (:printer bit-test-reg/mem ((op #b10111011))) (:emitter (emit-bit-test-and-mumble segment src index #b111)))
(define-instruction btr (segment src index) - (:printer bit-test-reg/mem ((op #b110))) + (:printer bit-test-reg/mem ((op #b10110011))) (:emitter (emit-bit-test-and-mumble segment src index #b110)))
(define-instruction bts (segment src index) - (:printer bit-test-reg/mem ((op #b101))) + (:printer bit-test-reg/mem ((op #b10101011))) (:emitter (emit-bit-test-and-mumble segment src index #b101)))
@@ -2062,11 +2062,11 @@ (code :field (byte 8 8)))
-(disassem:define-instruction-format (break 24 :default-printer '(:name :tab code)) - (op :fields (list (byte 8 0) (byte 8 8)) :value '(#xb00001111 #b00001011)) +(disassem:define-instruction-format (ud1 24 :default-printer '(:name :tab code)) + (op :fields (list (byte 8 0) (byte 8 8)) :value '(#xb00001111 #b10111001)) (code :field (byte 8 16)))
-(define-emitter emit-break-inst 24 +(define-emitter emit-ud1-inst 24 (byte 8 0) (byte 8 8) (byte 8 16))
(defun snarf-error-junk (sap offset &optional length-only) @@ -2102,7 +2102,7 @@ (defun break-control (chunk inst stream dstate) (declare (ignore inst)) (flet ((nt (x) (if stream (disassem:note x dstate)))) - (case (break-code chunk dstate) + (case (ud1-code chunk dstate) (#.vm:error-trap (nt "Error trap") (disassem:handle-break-args #'snarf-error-junk stream dstate)) @@ -2122,11 +2122,11 @@ ;; This is really the int3 instruction. (define-instruction break (segment code) (:declare (type (unsigned-byte 8) code)) - (:printer break ((op '(#b00001111 #b00001011))) + (:printer ud1 ((op '(#b00001111 #b10111001))) '(:name :tab code) :control #'break-control) (:emitter - (emit-break-inst segment #b00001111 #b00001011 code))) + (emit-ud1-inst segment #b00001111 #b10111001 code)))
#+nil (define-instruction ud2 (segment)
===================================== src/lisp/x86-arch.c ===================================== @@ -361,14 +361,14 @@ sigill_handler(HANDLER_ARGS) (stderr, "pc %x\n", *(unsigned short *)SC_PC(context)));
/* - * Make sure the trapping instruction is UD2. Abort if not. + * Make sure the trapping instruction is UD1. Abort if not. * * TODO: aborting is probably not the best idea. Could get here * from other illegal instructions in, say, C code? Maybe we * should call interrupt_handle_now, as we do below for an unknown * trap code? */ - if (*(unsigned short *) SC_PC(context) == 0x0b0f) { + if (*(unsigned short *) SC_PC(context) == 0xb90f) { trap = *(((char *)SC_PC(context)) + 2); } else { abort();
View it on GitLab: https://gitlab.common-lisp.net/cmucl/cmucl/-/commit/f8abdf9a5d35ba0195ed03b6...
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Raymond Toy