mirror of
https://github.com/SEPPDROID/Digital-Research-Source-Code.git
synced 2025-10-23 00:14:25 +00:00
48 lines
2.1 KiB
Plaintext
48 lines
2.1 KiB
Plaintext
.TITLE UNWINDTOFRAME.S Unwind to specified stack frame.
|
|
;-----------------------------------------------------------------------
|
|
;
|
|
; D I S C L A I M E R N O T I C E
|
|
; ------------------- -----------
|
|
;
|
|
; This document and/or portions of the material and data furnished
|
|
; herewith, was developed under sponsorship of the U. S. Government.
|
|
; Neither the U.S. nor the U.S.D.O.E., nor the Leland Stanford Junior
|
|
; University, nor their employees, nor their respective contractors,
|
|
; subcontractors, or their employees, makes any warranty, express or
|
|
; implied, or assumes any liability or responsibility for accuracy,
|
|
; completeness or usefulness of any information, apparatus, product
|
|
; or process disclosed, or represents that its use will not infringe
|
|
; privately-owned rights. Mention of any product, its manufacturer,
|
|
; or suppliers shall not, nor is it intended to, imply approval, dis-
|
|
; approval, or fitness for any particular use. The U. S. and the
|
|
; University at all times retain the right to use and disseminate same
|
|
; for any purpose whatsoever. Such distribution shall be made by the
|
|
; National Energy Software Center at the Argonne National Laboratory
|
|
; and only subject to the distributee furnishing satisfactory proof
|
|
; that he has a valid license from the Intel Corporation in effect.
|
|
;
|
|
;-----------------------------------------------------------------------
|
|
;
|
|
; WARNING WARNING WARNING WARNING WARNING WARNING WARNING
|
|
;
|
|
; This code will only work for modules compiled under the
|
|
; SMALL or MEDIUM controls.
|
|
;
|
|
;-----------------------------------------------------------------------
|
|
|
|
.PSECT UTIL_CODE,RD,NOWRT,EXE,GBL,CON,LONG
|
|
|
|
.ENTRY UNWINDTOFRAME,^M<>
|
|
|
|
MOVL 4(AP),R0 ; Save desired frame ptr value.
|
|
MOVL 16(FP),R1 ; Save return address.
|
|
LOOP: MOVAB B^RET1,16(FP) ; Stuff local return addr as saved PC.
|
|
RET ; Pop off a stack frame.
|
|
RET1: ; RET returns control to here.
|
|
CMPW FP,R0 ; Compare desired FP (low 16 bits only).
|
|
BNEQ LOOP ; Pop frames until desired frame reached.
|
|
SUBL2 #8,R10 ; -- Will get added back upon return.
|
|
JMP (R1) ; Done: return to caller.
|
|
|
|
.END
|