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uz
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src/ld65/exports.h
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164
src/ld65/exports.h
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/*****************************************************************************/
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/* */
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/* exports.h */
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/* */
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/* Exports handing for the ld65 linker */
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/* */
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/* */
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/* */
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/* (C) 1998 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 EXPORTS_H
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#define EXPORTS_H
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#include <stdio.h>
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#include "../common/exprdefs.h"
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#include "../common/filepos.h"
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#include "objdata.h"
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#include "config.h"
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/*****************************************************************************/
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/* Data */
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/*****************************************************************************/
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/* Import symbol structure */
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typedef struct Import_ Import;
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struct Import_ {
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Import* Next; /* Single linked list */
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ObjData* Obj; /* Object file that imports the name */
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FilePos Pos; /* File position of reference */
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union {
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struct Export_* Exp; /* Matching export for this import */
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const char* Name; /* Name if not in table */
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} V;
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unsigned char Type; /* Type of import */
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};
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/* Export symbol structure */
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typedef struct Export_ Export;
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struct Export_ {
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Export* Next; /* Hash table link */
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unsigned Flags; /* Generic flags */
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ObjData* Obj; /* Object file that exports the name */
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unsigned ImpCount; /* How many imports for this symbol? */
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Import* ImpList; /* List of imports for this symbol */
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FilePos Pos; /* File position of definition */
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ExprNode* Expr; /* Expression (0 if not def'd) */
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unsigned char Type; /* Type of export */
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char Name [1]; /* Name - dynamically allocated */
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};
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/* Prototype of a function that is called if an undefined symbol is found. It
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* may check if the symbol is an external symbol (for binary formats that
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* support externals) and will return zero if the symbol could not be
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* resolved, or a value != zero if the symbol could be resolved. The
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* CheckExports routine will print out the missing symbol in the first case.
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*/
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typedef int (*ExpCheckFunc) (const char* Name, void* Data);
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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Import* ReadImport (FILE* F, ObjData* Obj);
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/* Read an import from a file and insert it into the table */
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void InsertImport (Import* I);
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/* Insert an import into the table */
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Export* ReadExport (FILE* F, ObjData* Obj);
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/* Read an export from a file */
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void InsertExport (Export* E);
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/* Insert an exported identifier and check if it's already in the list */
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Export* CreateConstExport (const char* Name, long Value);
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/* Create an export for a literal date */
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Export* CreateMemExport (const char* Name, Memory* Mem, unsigned long Offs);
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/* Create an relative export for a memory area offset */
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int IsUnresolved (const char* Name);
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/* Check if this symbol is an unresolved export */
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int IsConstExport (const Export* E);
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/* Return true if the expression associated with this export is const */
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long GetExportVal (const Export* E);
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/* Get the value of this export */
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void CheckExports (ExpCheckFunc F, void* Data);
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/* Check if there are any unresolved symbols. On unresolved symbols, F is
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* called (see the comments on ExpCheckFunc in the data section).
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*/
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void PrintExportMap (FILE* F);
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/* Print an export map to the given file */
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void PrintImportMap (FILE* F);
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/* Print an import map to the given file */
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void PrintExportLabels (FILE* F);
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/* Print the exports in a VICE label file */
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void MarkExport (Export* E);
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/* Mark the export */
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void UnmarkExport (Export* E);
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/* Remove the mark from the export */
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int ExportHasMark (Export* E);
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/* Return true if the export has a mark */
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void CircularRefError (const Export* E);
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/* Print an error about a circular reference using to define the given export */
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/* End of exports.h */
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#endif
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