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TITLE RTLDYN -- RTL library interface

;
;	COPYRIGHT (C) DIGITAL EQUIPMENT CORPORATION 1984, 1986.
;	ALL RIGHTS RESERVED.
;
;	THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY  BE  USED  AND
;	COPIED ONLY IN ACCORDANCE WITH THE TERMS OF SUCH LICENSE AND WITH
;	THE INCLUSION OF THE ABOVE COPYRIGHT NOTICE.   THIS  SOFTWARE  OR
;	ANY  OTHER  COPIES  THEREOF MAY NOT BE PROVIDED OR OTHERWISE MADE
;	AVAILABLE TO ANY OTHER PERSON.  NO TITLE TO AND OWNERSHIP OF  THE
;	SOFTWARE IS HEREBY TRANSFERRED.
;
;	THE INFORMATION IN THIS SOFTWARE IS  SUBJECT  TO  CHANGE  WITHOUT
;	NOTICE  AND  SHOULD  NOT  BE CONSTRUED AS A COMMITMENT BY DIGITAL
;	EQUIPMENT CORPORATION.
;
;	DIGITAL ASSUMES NO RESPONSIBILITY FOR THE USE OR  RELIABILITY  OF
;	ITS SOFTWARE ON EQUIPMENT THAT IS NOT SUPPLIED BY DIGITAL.
;

SUBTTL Edit History

; Version 1.0

; Version 1.1

;.EDIT 50	Formally go to version 1.1, update copyright, insert V1.1
;			development changes (formally V2)
;		DDB,15-Jan-85,SPR:NONE
;.EDIT 51	Add GLOBbing in build procedure, make DY$CBK work from JCK.
;		DDB,30-Apr-85,SPR:NONE
;.EDIT 55	Add RL$2BG -- convert two-word byte-pointer to OWG.
;		DDB,10-JUN-85,SPR:NONE

SEARCH DDBSYM,DYNSYM,RTLDYN,MONSYM,MACSYM

SALL

SEGMENT DATA

; For ease in debugging, define names for DDT in various sections
DD1==1,,770000
DD2==2,,770000
DD3==3,,770000
DD4==4,,770000

; Declare all exported addresses not defined in this module as external

; Routines

EXTERN	ABS.,	ACOS.,	AIMAG.,	AINT.,	ALG10.,	ALOG.,	AMAX0.,	AMAX1.
EXTERN	AMIN0.,	AMIN1.,	AMOD.,	ANINT.,	ASIN.,	ATAN.,	ATAN2.,	CABS.
EXTERN	CCOS.,	CDABS.,	CDCOS.,	CDEXP.,	CDLOG,	CDSIN.,	CDSQT.,	CEXP.
EXTERN	CEXP2.,	CEXP3.,	CGABS.,	CGCOS.,	CGEXP.,	CGLOG.,	CGSIN.,	CGSQT.
EXTERN	CLOG.,	CMPL.C,	CMPL.D,	CMPL.G,	CMPL.I,	CMPLX.,	CONJG.,	COS.
EXTERN	COSD.,	COSH.,	COTAN.,	CSIN.,	CSQRT.,	DABS.,	DACOS.,	DASIN.
EXTERN	DATAN.,	DATN2.,	DBLE.,	DCOS.,	DCOSH.,	DCOTN.,	DDIM.,	DEXP.
EXTERN	DEXP2.,	DEXP3.,	DFLOT.,	DIM.,	DINT.,	DLG10.,	DLOG.,	DMAX1.
EXTERN	DMIN1.,	DMOD.,	DNINT.,	DPROD.,	DSIGN.,	DSIN.,	DSINH.,	DSQRT.
EXTERN	DTAN.,	DTANH.,	DTOG,	DTOGA,	DY$BS,	DY$DYN,	DY$LER,	DY$LOD
EXTERN	DY$MIN,	EXP.,	EXP1.,	EXP2.,	EXP3.,	FLOAT.,	GACOS.,	GASIN.
EXTERN	GATAN.,	GATN2.,	GCOS.,	GCOSH.,	GCOTN.,	GDIM.,	GEXP.,	GEXP2.
EXTERN	GEXP3.,	GINT.,	GLG10.,	GLOG.,	GMOD.,	GNINT.,	GPROD.,	GSIN.
EXTERN	GSINH.,	GSQRT.,	GTAN.,	GTANH.,	GTOD,	GTODA,	IABS.,	IDIM.
EXTERN	IDINT.,	IDNIN.,	IFIX.,	IGNIN.,	INT.,	ISIGN.,	MAX0.,	MAX1.
EXTERN	ME$ALM,	ME$ALP,	ME$ALS,	ME$DLM,	ME$DLP,	ME$DLS,	ME$DMC,	ME$MEM
EXTERN	MIN0.,	MIN1.,	MOD.,	NINT.,	RAN,	RANS,	RL$FAO,	SAVRAN
EXTERN	SETRAN,	SG$ALC,	SG$DIC,	SG$DLC,	SG$DLG,	SG$DMG,	SG$EIC,	SG$EST
EXTERN	SG$LES,	SG$LRM,	SG$PEM,	SG$REM,	SG$SEC,	SG$SIG,	SIGN.,	SIN.
EXTERN	SIND.,	SINH.,	SNGL.,	SQRT.,	TAN.,	TANH.,	SG$NAS,	DY$CBK
EXTERN	RL$LBG
EXTERN	RL$NUL			;[51]
EXTERN	RL$2BG			;[55]

; Galactic variables

EXTERN	ENSTK,	SG.ENS,	SG.LEV,	SG.PFX,	SG.SFX,	SG.DPX,	SG.DSX,	SG.OUT
EXTERN	SG.NAS
EXTERN	DY.ZMP			;[51]

; DLBLK for run-time library

	$DLBLK $RTL

SUBTTL RL$MIN -- Master-initialization routine for the run-time library

EXTERNAL ERCNKS, ERCNKE, RTCNKS, RTCNKE, RT.CKS, RT.CKE, CNKMAX
EXTERNAL SG.LER

SEGMENT CODE

; Need not preserve any registers.
; Trapping (and interrupts) are (will be) turned on during the call to
; DY$MIN.  They aren't enabled here because that causes problems for section
; zero support.  See SG.NAS / SG$NAS for more details.

; Return non-zero in T1 on error

RL$MIN::

; For signalling
	XMOVEI T0, ENSTK-1
	MOVEM T0, SG.ENS	;Establish stack pointer
	SETZM SG.LER		;No last error
	SETZM SG.NAS		;Trapping on by default

; Set up for MTHDYN error processing
EXTERNAL ERRSTK,ERSTKP,%FSECT,PDLBOT
	XMOVEI T1,ERRSTK	;SET UP ERROR STACK
	MOVEM T1,ERSTKP
	XHLLI T1, .		;Get our section number
	HLLZM T1,%FSECT		;RECORD OUR RUNNING SECTION
	XMOVEI T1, -60(P)
	MOVEM T1, PDLBOT
	;Actual enabling of traps done within DY$MIN

; LDH parameters
	MOVX T0, .INFIN
	MOVEM T0, SG.LEV
	XMOVEI T0, SG.DPX
	MOVEM T0, SG.PFX
	XMOVEI T0, SG.DSX
	MOVEM T0, SG.SFX
	MOVX T0, .PRIOU
	MOVEM T0, SG.OUT

; Memory management
  ; Clear out chunk table
	MOVE T0, [RT.CKS,,RT.CKS+1]
	SETZM RT.CKS
	BLT T0, RT.CKS+CNKMAX-1
	MOVE T0, [RT.CKE,,RT.CKE+1]
	SETZM RT.CKE
	BLT T0, RT.CKE+CNKMAX-1

  ; The special error chunk -- used for error processing (less likely to run
  ; out in the middle of an error this way)

	XMOVEI T1, ERCNKS	;Start address
	XMOVEI T2, ERCNKE	;End address
	CALL ME$MEM		;Chunk initiialization
	CAIE T1, .MEERR
	    HALTF%

  ; The RTL general use chunk (eventually to be allocated from LINK memory
  ; map, but for now statically allocated)
	XMOVEI T1, RTCNKS	;Start address
	XMOVEI T2, RTCNKE	;End address
	CALL ME$MEM		;Chunk initialization
	CAIE T1, .MERTL
	    HALTF%

	SETZB T0, T1

	RET

SUBTTL MAKPDV -- Hack to make PDV until LINK can do it

INTERN RTLPDV			;Need to know where this is in DY$MIN
				;to avoid duplicate initialization of self

MAKPDV:	$LIBPDV $RTL,,,RTLPDV

	MOVX T1, .FHSLF
	MOVX T2, 0
	SEVEC%
	  ERJMP .+1

	HALTF%
	JRST .-1

	END MAKPDV