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uz
152
src/ld65/segments.h
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152
src/ld65/segments.h
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/*****************************************************************************/
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/* */
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/* segments.h */
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/* */
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/* Segment handling for the ld65 linker */
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/* */
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/* */
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/* */
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/* (C) 1998-2000 Ullrich von Bassewitz */
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/* Wacholderweg 14 */
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/* D-70597 Stuttgart */
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/* EMail: uz@musoftware.de */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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#ifndef SEGMENTS_H
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#define SEGMENTS_H
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#include <stdio.h>
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#include "../common/exprdefs.h"
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#include "objdata.h"
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/*****************************************************************************/
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/* Data */
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/*****************************************************************************/
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/* Forward for the section structure (a section is a part of a segment) */
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typedef struct Section_ Section;
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/* Segment structure */
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typedef struct Segment_ Segment;
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struct Segment_ {
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Segment* Next; /* Hash list */
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Segment* List; /* List of all segments */
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Section* SecRoot; /* Section list */
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Section* SecLast; /* Pointer to last section */
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unsigned long PC; /* PC were this segment is located */
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unsigned long Size; /* Size of data so far */
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ObjData* AlignObj; /* Module that requested the alignment */
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unsigned char Align; /* Alignment needed */
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unsigned char FillVal; /* Value to use for fill bytes */
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unsigned char Type; /* Type of segment */
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char Dumped; /* Did we dump this segment? */
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char Name [1]; /* Name, dynamically allocated */
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};
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/* Section structure (a section is a part of a segment) */
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struct Section_ {
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Section* Next; /* List of sections in a segment */
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Segment* Seg; /* Segment that contains the section */
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struct Fragment_* FragRoot; /* Fragment list */
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struct Fragment_* FragLast; /* Pointer to last fragment */
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unsigned long Offs; /* Offset into the segment */
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unsigned long Size; /* Size of the section */
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unsigned char Align; /* Alignment */
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unsigned char Fill; /* Fill bytes for alignment */
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unsigned char Type; /* Type of segment */
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};
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/* Prototype for a function that is used to write expressions to the target
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* file (used in SegWrite). It returns one of the following values:
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*/
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#define SEG_EXPR_OK 0 /* Ok */
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#define SEG_EXPR_RANGE_ERROR 1 /* Range error */
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#define SEG_EXPR_TOO_COMPLEX 2 /* Expression too complex */
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typedef unsigned (*SegWriteFunc) (ExprNode* E, /* The expression to write */
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int Signed, /* Signed expression? */
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unsigned Size, /* Size (=range) */
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unsigned long Offs, /* File offset */
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void* Data); /* Callers data */
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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Section* ReadSection (FILE* F, ObjData* O);
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/* Read a section from a file */
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Segment* SegFind (const char* Name);
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/* Return the given segment or NULL if not found. */
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int IsBSSType (Segment* S);
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/* Check if the given segment is a BSS style segment, that is, it does not
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* contain non-zero data.
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*/
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void SegDump (void);
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/* Dump the segments and it's contents */
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unsigned SegWriteConstExpr (FILE* F, ExprNode* E, int Signed, unsigned Size);
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/* Write a supposedly constant expression to the target file. Do a range
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* check and return one of the SEG_EXPR_xxx codes.
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*/
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void SegWrite (FILE* Tgt, Segment* S, SegWriteFunc F, void* Data);
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/* Write the data from the given segment to a file. For expressions, F is
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* called (see description of SegWriteFunc above).
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*/
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void PrintSegmentMap (FILE* F);
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/* Print a segment map to the given file */
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void CheckSegments (void);
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/* Walk through the segment list and check if there are segments that were
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* not written to the output file. Output an error if this is the case.
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*/
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/* End of segments.h */
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#endif
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