mirror of
https://github.com/byteworksinc/ORCA-C.git
synced 2024-11-19 03:07:00 +00:00
ecca7a7737
This would previously happen if a segment directive with "dynamic" appeared before the first function in the program. That would cause the resulting program not to work, because the root segment needs to be a static segment at the start of the program, but if it is dynamic it would come after a jump table and a static segment of library code. The root segments are also configured to refer to main or the NDA/CDA entry points using LEXPR records, so that they can be in dynamic segments (not that they necessarily should be). That change is intentionally not done for CDEV/XCMD/NBA, because they use code resources, which do not support dynamic segments, so it is better to force a linker error in these cases.
619 lines
19 KiB
ObjectPascal
619 lines
19 KiB
ObjectPascal
{$optimize 7}
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{---------------------------------------------------------------}
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{ }
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{ ObjOut }
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{ }
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{ This unit has the primitive routines used to actually }
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{ create and write to object modules. A few low-level }
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{ subroutines that need to be in assembly language for speed }
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{ are also included here. }
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{ }
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{ External Subroutines: }
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{ }
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{ CloseObj - close the current obj file }
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{ CloseSeg - close out the current segment }
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{ COut - write a code byte to the object file }
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{ CnOut - write a byte to the constant buffer }
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{ CnOut2 - write a word to the constant buffer }
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{ DestroySuffixes - destroy the .a, .b, etc suffixes }
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{ FindSuffix - find the next available alphabetic suffix }
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{ Header - write a segment header to the output file }
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{ OpenObj - open a new obj file with the indicated file name }
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{ OpenSeg - create a new segment and mark its beginning }
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{ Out - write a byte to the output file }
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{ Out2 - write a word to the output file }
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{ Purge - write any constant bytes to the output buffer }
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{ }
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{---------------------------------------------------------------}
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unit CCommon;
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interface
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{$LibPrefix '0/obj/'}
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uses CCommon, CGI, CGC;
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{$segment 'CODEGEN'}
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procedure CloseObj;
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{ close the current obj file }
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{ }
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{ Note: Declared as extern in CGI.pas }
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procedure COut (b: integer); extern;
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{ write a code byte to the object file }
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{ }
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{ parameters: }
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{ b - byte to write }
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procedure CnOut (i: integer); extern;
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{ write a byte to the constant buffer }
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{ }
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{ parameters: }
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{ i - byte to write }
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procedure CnOut2 (i: integer); extern;
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{ write a word to the constant buffer }
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{ }
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{ parameters: }
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{ i - word to write }
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procedure DestroySuffixes (var name: gsosOutString);
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{ destroy the .a, .b, etc suffixes }
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{ }
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{ parameters: }
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{ name - root name of file sequence to destroy }
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procedure CloseSeg;
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{ close out the current segment }
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procedure FindSuffix (var name: gsosOutString; var ch: char);
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{ find the next available alphabetic suffix }
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{ }
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{ parameters: }
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{ ch - addr to place suffix character }
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{ name - root name of suffix to find }
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procedure Header (name: stringPtr; kind: integer; lengthCode: integer);
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{ write a segment header to the output file }
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{ }
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{ parameters: }
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{ name - name of the segment }
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{ kind - segment kind }
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{ lengthCode - code bank size code; bank size div $10000 }
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procedure OpenSeg;
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{ create a new segment and mark its beginning }
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procedure OpenObj (var name: gsosOutString);
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{ open a new obj file with the indicated file name }
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{ }
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{ parameters: }
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{ name - object file name }
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procedure Out (b: integer); extern;
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{ write a byte to the output file }
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{ }
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{ parameters: }
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{ b - byte to write }
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procedure Out2 (w: integer); extern;
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{ write a word to the output file }
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{ }
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{ parameters: }
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{ w - word to write }
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procedure Purge;
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{ write any constant bytes to the output buffer }
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{---------------------------------------------------------------}
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implementation
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const
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initialBuffSize = $10000; {initial size of the obj buffer}
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{NOTE: must be a power of two >= 64K}
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maxCBuffLen = 191; {length of the constant buffer}
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OBJ = $B1; {object file type}
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type
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closeOSDCB = record {Close DCB}
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pcount: integer;
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refNum: integer;
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end;
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createOSDCB = record {Create DCB}
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pcount: integer;
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pathName: gsosInStringPtr;
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access: integer;
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fileType: integer;
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auxType: longint;
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storageType: integer;
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dataEOF: longint;
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resourceEOF: longint;
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end;
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destroyOSDCB = record {Destroy DCB}
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pcount: integer;
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pathName: gsosInStringPtr;
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end;
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getFileInfoOSDCB = record {GetFileInfo DCB}
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pcount: integer;
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pathName: gsosInStringPtr;
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access: integer;
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fileType: integer;
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auxType: longint;
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storageType: integer;
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createDateTime: timeField;
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modDateTime: timeField;
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optionList: optionListPtr;
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dataEOF: longint;
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blocksUsed: longint;
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resourceEOF: longint;
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resourceBlocks: longint;
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end;
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openOSDCB = record {Open DCB}
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pcount: integer;
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refNum: integer;
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pathName: gsosInStringPtr;
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requestAccess: integer;
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resourceNumber: integer;
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access: integer;
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fileType: integer;
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auxType: longint;
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storageType: integer;
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createDateTime: timeField;
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modDateTime: timeField;
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optionList: optionListPtr;
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dataEOF: longint;
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blocksUsed: longint;
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resourceEOF: longint;
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resourceBlocks: longint;
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end;
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readWriteOSDCB = record {WriteGS DCB}
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pcount: integer;
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refNum: integer;
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dataBuffer: ptr;
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requestCount: longint;
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transferCount: longint;
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cachePriority: integer;
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end;
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{---------------------------------------------------------------}
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var
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cBuff: array[0..maxCBuffLen] of byte; {constant buffer}
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objLen: longint; {# bytes used in obj buffer}
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objHandle: handle; {handle of the obj buffer}
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objPtr: ptr; {points to first byte in current segment}
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minusBuffSize: longint; {size of obj buffer, negated}
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spoolRefnum: integer; {reference number for open file}
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{---------------------------------------------------------------}
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{memory manager calls}
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{--------------------}
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procedure BlockMove (sourcPtr, destPtr: ptr; count: longint); tool ($02, $2B);
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function NewHandle (blockSize: longint; userID, memAttributes: integer;
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memLocation: ptr): handle; tool($02, $09);
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procedure SetHandleSize (newSize: longint; theHandle: handle); tool ($02, $19);
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procedure HUnLock (theHandle: handle); tool ($02, $22);
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procedure HLock (theHandle: handle); tool ($02, $20);
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{ProDOS calls}
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{------------}
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procedure CloseGS (var parms: closeOSDCB); prodos ($2014);
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procedure CreateGS (var parms: createOSDCB); prodos ($2001);
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procedure DestroyGS (var parms: destroyOSDCB); prodos ($2002);
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procedure GetFileInfoGS (var parms: getFileInfoOSDCB); prodos ($2006);
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procedure OpenGS (var parms: openOSDCB); prodos ($2010);
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procedure WriteGS (var parms: readWriteOSDCB); prodos ($2013);
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{---------------------------------------------------------------}
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procedure PurgeObjBuffer;
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{ Spool any completed segments to the object file }
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var
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len: longint; {# bytes to write}
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sPtr: ptr; {start of object buffer}
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wrRec: readWriteOSDCB; {WriteGS record}
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procedure InitSpoolFile;
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{ Set up the spool file }
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var
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dsRec: destroyOSDCB; {DestroyGS record}
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crRec: createOSDCB; {CreateGS record}
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opRec: openOSDCB; {OpenGS record}
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begin {InitSpoolFile}
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if memoryCompile then {make sure this is a disk-based compile}
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TermError(3);
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dsRec.pCount := 1; {destroy any old file}
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dsRec.pathname := @objFile.theString;
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DestroyGS(dsRec);
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crRec.pCount := 5; {create a new file}
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crRec.pathName := @objFile.theString;
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crRec.access := $C3;
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crRec.fileType := OBJ;
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crRec.auxType := $0000;
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crRec.storageType := 1;
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CreateGS(crRec);
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if ToolError <> 0 then
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TermError(9);
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opRec.pCount := 3; {open the file}
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opRec.pathname := @objFile.theString;
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opRec.requestAccess := 3;
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OpenGS(opRec);
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if ToolError <> 0 then
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TermError(9);
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spoolRefnum := opRec.refnum;
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end; {InitSpoolFile}
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begin {PurgeObjBuffer}
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if spoolRefnum = 0 then {make sure the spool file exists}
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InitSpoolFile;
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sPtr := objHandle^; {determine size of completed segments}
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len := ord4(objPtr) - ord4(sPtr);
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if len <> 0 then begin
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wrRec.pcount := 4; {write completed segments}
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wrRec.refnum := spoolRefnum;
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wrRec.dataBuffer := pointer(sPtr);
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wrRec.requestCount := len;
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WriteGS(wrRec);
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if ToolError <> 0 then {check for write errors}
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TermError(9);
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objLen := 0; {adjust file pointers}
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BlockMove(objPtr, sPtr, segDisp);
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objPtr := sPtr;
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end; {if}
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end; {PurgeObjBuffer}
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procedure MakeSpaceInObjBuffer;
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{ Make space in the object buffer (at least two bytes) by }
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{ purging or expanding it. }
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var
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segOffset: longint; {offset into buffer of current segment}
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begin {MakeSpaceInObjBuffer}
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segOffset := ord4(objPtr) - ord4(objHandle^);
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if (segOffset >= 2) and not memoryCompile then
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PurgeObjBuffer
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else begin
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{resize the buffer}
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minusBuffSize := minusBuffSize * 2;
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HUnLock(objHandle);
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SetHandleSize(-minusBuffSize, objHandle);
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if ToolError <> 0 then
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TermError(5);
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HLock(objHandle);
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objPtr := ptr(ord4(objHandle^) + segOffset);
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end; {if}
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end; {MakeSpaceInObjBuffer}
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{---------------------------------------------------------------}
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procedure CloseObj;
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{ close the current obj file }
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{ }
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{ Note: Declared as extern in CGI.pas }
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var
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clRec: closeOSDCB; {CloseGS record}
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ffDCBGS: fastFileDCBGS; {dcb for fastfile call}
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i: integer; {loop/index variable}
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begin {CloseObj}
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if spoolRefnum <> 0 then begin
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PurgeObjBuffer;
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clRec.pCount := 1;
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clRec.refnum := spoolRefnum;
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CloseGS(clRec);
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end {if}
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else if objLen <> 0 then begin
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{resize the buffer}
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HUnLock(objHandle);
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SetHandleSize(objLen, objHandle);
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HLock(objHandle);
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{save the file}
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ffDCBGS.pCount := 14;
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ffDCBGS.fileHandle := objHandle;
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ffDCBGS.pathName := @objFile.theString;
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ffDCBGS.access := $C3;
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ffDCBGS.fileType := OBJ;
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ffDCBGS.auxType := 0;
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ffDCBGS.storageType := 1;
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for i := 1 to 8 do
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ffDCBGS.createDate[i] := 0;
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ffDCBGS.modDate := ffDCBGS.createDate;
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ffDCBGS.option := nil;
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ffDCBGS.fileLength := objLen;
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if memoryCompile then begin
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ffDCBGS.flags := 0;
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ffDCBGS.action := 4;
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end {if}
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else begin
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ffDCBGS.flags := $C000;
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ffDCBGS.action := 3;
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end; {else}
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FastFileGS(ffDCBGS);
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if ToolError <> 0 then
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TermError(9)
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else begin
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ffDCBGS.PATHName := @objFile.theString;
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ffDCBGS.action := 7;
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FastFileGS(ffDCBGS);
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end; {else}
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end; {if}
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end; {CloseObj}
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procedure DestroySuffixes {var name: gsosOutString};
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{ destroy the .a, .b, etc suffixes }
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{ }
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{ parameters: }
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{ name - root name of file sequence to destroy }
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var
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done: boolean; {loop termination flag}
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dsDCBGS: destroyOSDCB; {dcb for destroy call}
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giDCBGS: getFileInfoOSDCB; {dcb for Get_File_Info call}
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suffix: char; {current suffix character}
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fName: gsosInString; {work file name}
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begin {DestroySuffixes}
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suffix := 'a';
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done := false;
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repeat
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fName := name.theString;
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if fName.size > maxPath-2 then
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fName.size := maxPath-2;
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fName.theString[fName.size+1] := '.';
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fName.theString[fName.size+2] := suffix;
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fName.size := fName.size + 2;
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giDCBGS.pCount := 12;
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giDCBGS.optionList := nil;
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giDCBGS.pathName := @fName;
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GetFileInfoGS(giDCBGS);
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if ToolError = 0 then begin
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if giDCBGS.fileType = OBJ then begin
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dsDCBGS.pCount := 1;
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dsDCBGS.pathName := @fName;
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DestroyGS(dsDCBGS);
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end; {if}
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end {if}
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else
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done := true;
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suffix := succ(suffix);
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until done;
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end; {DestroySuffixes}
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procedure CloseSeg;
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{ close out the current segment }
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{ }
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{ variables: }
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{ objHandle - segment handle }
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{ objLen - used bytes in the segment }
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{ objPtr - set to point to a fresh segment }
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var
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longPtr: ^longint; {used to set the block count}
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begin {CloseSeg}
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longPtr := pointer(objPtr); {set the block count}
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longPtr^ := segDisp;
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objLen := objLen + segDisp; {update the length of the obj file}
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objPtr := pointer(ord4(objHandle^)+objLen); {set objPtr}
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segDisp := 0;
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currentSegment := defaultSegment; {revert to default segment name & kind}
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segmentKind := defaultSegmentKind;
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end; {CloseSeg}
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procedure FindSuffix {var name: gsosOutString; var ch: char};
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{ find the next available alphabetic suffix }
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{ }
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{ parameters: }
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{ ch - addr to place suffix character }
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{ name - root name of suffix to find }
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var
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done: boolean; {loop termination test}
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giDCBGS: getFileInfoOSDCB; {dcb for Get_File_Info call}
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fName: gsosInString; {work file name}
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begin {FindSuffix}
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ch := 'a';
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done := false;
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repeat
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fName := name.theString;
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if fName.size > maxPath-2 then
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fName.size := maxPath-2;
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fName.theString[fName.size+1] := '.';
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fName.theString[fName.size+2] := ch;
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fName.size := fName.size + 2;
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giDCBGS.pCount := 12;
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giDCBGS.optionList := nil;
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giDCBGS.pathName := @fName;
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GetFileInfoGS(giDCBGS);
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if ToolError = 0 then
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ch := succ(ch)
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else
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done := true;
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until done;
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end; {FindSuffix}
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procedure Header {name: stringPtr; kind: integer; lengthCode: integer};
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{ write a segment header to the output file }
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{ }
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{ parameters: }
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{ name - name of the segment }
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{ kind - segment kind }
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{ lengthCode - code bank size code; bank size div $10000 }
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var
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i: integer; {loop var}
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len: integer; {length of string}
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begin {Header}
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OpenSeg; {start the new segment}
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blkcnt := 0; segdisp := 0;
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for i := 1 to 12 do {blkcnt,resspc,length}
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Out(0);
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Out(0); {unused}
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Out(0); {lablen}
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Out(4); {numlen}
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Out(2); {version}
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Out2(0); Out2(ord(lengthcode=0)); {cbanksize}
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Out2(kind|segmentKind); {kind}
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for i := 1 to 9 do {unused,org,align,numsex,unused,segnum,entry}
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Out2(0);
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len := length(name^); {dispname,dispdata}
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Out2($30); Out2($3B+len);
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Out2(0); Out2(0); {temporg}
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for i := 1 to 10 do {write the segment name}
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Out(ord(currentSegment[i]));
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Out(len); {segname}
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for i := 1 to len do
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Out(ord(name^[i]));
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end; {Header}
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procedure OpenSeg;
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{ create a new segment and mark its beginning }
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begin {OpenSeg}
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segDisp := 0;
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end; {OpenSeg}
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procedure OpenObj {var name: gsosOutString};
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|
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{ open a new obj file with the indicated file name }
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|
{ }
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{ parameters: }
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{ name - object file name }
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var
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dsDCBGS: destroyOSDCB; {dcb for Destroy call}
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|
giDCBGS: getFileInfoOSDCB; {dcb for Get_File_Info call}
|
|
|
|
begin {OpenObj}
|
|
{the file is not spooled (yet)}
|
|
spoolRefnum := 0;
|
|
|
|
{if there is an existing file, delete it}
|
|
if memoryCompile then begin
|
|
giDCBGS.pCount := 3;
|
|
giDCBGS.pathName := @name.theString;
|
|
GetFileInfoGS(giDCBGS);
|
|
if ToolError = 0 then
|
|
if giDCBGS.fileType = OBJ then begin
|
|
dsDCBGS.pCount := 1;
|
|
dsDCBGS.pathName := @name.theString;
|
|
DestroyGS(dsDCBGS);
|
|
end; {if}
|
|
end; {if}
|
|
|
|
{allocate memory for an initial buffer}
|
|
objHandle := pointer(NewHandle(initialBuffSize, userID, $8000, nil));
|
|
|
|
{set up the buffer variables}
|
|
if ToolError = 0 then begin
|
|
objLen := 0;
|
|
objPtr := objHandle^;
|
|
minusBuffSize := -initialBuffSize;
|
|
end {if}
|
|
else
|
|
TermError(5);
|
|
|
|
{save the object file name}
|
|
objFile := name;
|
|
end; {OpenObj}
|
|
|
|
|
|
procedure Purge;
|
|
|
|
{ write any constant bytes to the output buffer }
|
|
|
|
var
|
|
i: integer; {loop variable}
|
|
|
|
begin {Purge}
|
|
if cBuffLen <> 0 then begin
|
|
Out(cBuffLen);
|
|
for i := 0 to cBuffLen-1 do
|
|
COut(cBuff[i]);
|
|
cBuffLen := 0;
|
|
end; {if}
|
|
end; {Purge}
|
|
|
|
end.
|
|
|
|
{$append 'objout.asm'}
|