/*****************************************************************************/ /* */ /* segments.h */ /* */ /* Segment handling for the ld65 linker */ /* */ /* */ /* */ /* (C) 1998-2001 Ullrich von Bassewitz */ /* Wacholderweg 14 */ /* D-70597 Stuttgart */ /* EMail: uz@cc65.org */ /* */ /* */ /* This software is provided 'as-is', without any expressed or implied */ /* warranty. In no event will the authors be held liable for any damages */ /* arising from the use of this software. */ /* */ /* Permission is granted to anyone to use this software for any purpose, */ /* including commercial applications, and to alter it and redistribute it */ /* freely, subject to the following restrictions: */ /* */ /* 1. The origin of this software must not be misrepresented; you must not */ /* claim that you wrote the original software. If you use this software */ /* in a product, an acknowledgment in the product documentation would be */ /* appreciated but is not required. */ /* 2. Altered source versions must be plainly marked as such, and must not */ /* be misrepresented as being the original software. */ /* 3. This notice may not be removed or altered from any source */ /* distribution. */ /* */ /*****************************************************************************/ #ifndef SEGMENTS_H #define SEGMENTS_H #include /* common */ #include "exprdefs.h" /*****************************************************************************/ /* Data */ /*****************************************************************************/ /* Segment structure */ typedef struct Segment Segment; struct Segment { Segment* Next; /* Hash list */ Segment* List; /* List of all segments */ struct Section* SecRoot; /* Section list */ struct Section* SecLast; /* Pointer to last section */ unsigned long PC; /* PC were this segment is located */ unsigned long Size; /* Size of data so far */ struct ObjData* AlignObj; /* Module that requested the alignment */ unsigned char Align; /* Alignment needed */ unsigned char FillVal; /* Value to use for fill bytes */ unsigned char Type; /* Type of segment */ char Dumped; /* Did we dump this segment? */ char Name [1]; /* Name, dynamically allocated */ }; /* Section structure (a section is a part of a segment) */ typedef struct Section Section; struct Section { Section* Next; /* List of sections in a segment */ Segment* Seg; /* Segment that contains the section */ struct Fragment* FragRoot; /* Fragment list */ struct Fragment* FragLast; /* Pointer to last fragment */ unsigned long Offs; /* Offset into the segment */ unsigned long Size; /* Size of the section */ unsigned char Align; /* Alignment */ unsigned char Fill; /* Fill bytes for alignment */ unsigned char Type; /* Type of segment */ }; /* Prototype for a function that is used to write expressions to the target * file (used in SegWrite). It returns one of the following values: */ #define SEG_EXPR_OK 0U /* Ok */ #define SEG_EXPR_RANGE_ERROR 1U /* Range error */ #define SEG_EXPR_TOO_COMPLEX 2U /* Expression too complex */ #define SEG_EXPR_INVALID 3U /* Expression is invalid (e.g. unmapped segment) */ typedef unsigned (*SegWriteFunc) (ExprNode* E, /* The expression to write */ int Signed, /* Signed expression? */ unsigned Size, /* Size (=range) */ unsigned long Offs, /* File offset */ void* Data); /* Callers data */ /*****************************************************************************/ /* Code */ /*****************************************************************************/ Segment* GetSegment (const char* Name, unsigned char Type, const char* ObjName); /* Search for a segment and return an existing one. If the segment does not * exist, create a new one and return that. ObjName is only used for the error * message and may be NULL if the segment is linker generated. */ Section* NewSection (Segment* Seg, unsigned char Align, unsigned char Type); /* Create a new section for the given segment */ Section* ReadSection (FILE* F, struct ObjData* O); /* Read a section from a file */ Segment* SegFind (const char* Name); /* Return the given segment or NULL if not found. */ int IsBSSType (Segment* S); /* Check if the given segment is a BSS style segment, that is, it does not * contain non-zero data. */ void SegDump (void); /* Dump the segments and it's contents */ unsigned SegWriteConstExpr (FILE* F, ExprNode* E, int Signed, unsigned Size); /* Write a supposedly constant expression to the target file. Do a range * check and return one of the SEG_EXPR_xxx codes. */ void SegWrite (FILE* Tgt, Segment* S, SegWriteFunc F, void* Data); /* Write the data from the given segment to a file. For expressions, F is * called (see description of SegWriteFunc above). */ void PrintSegmentMap (FILE* F); /* Print a segment map to the given file */ void CheckSegments (void); /* Walk through the segment list and check if there are segments that were * not written to the output file. Output an error if this is the case. */ /* End of segments.h */ #endif