1 /*****************************************************************************/
5 /* Exports handing for the ld65 linker */
9 /* (C) 1998-2000 Ullrich von Bassewitz */
11 /* D-70597 Stuttgart */
12 /* EMail: uz@musoftware.de */
15 /* This software is provided 'as-is', without any expressed or implied */
16 /* warranty. In no event will the authors be held liable for any damages */
17 /* arising from the use of this software. */
19 /* Permission is granted to anyone to use this software for any purpose, */
20 /* including commercial applications, and to alter it and redistribute it */
21 /* freely, subject to the following restrictions: */
23 /* 1. The origin of this software must not be misrepresented; you must not */
24 /* claim that you wrote the original software. If you use this software */
25 /* in a product, an acknowledgment in the product documentation would be */
26 /* appreciated but is not required. */
27 /* 2. Altered source versions must be plainly marked as such, and must not */
28 /* be misrepresented as being the original software. */
29 /* 3. This notice may not be removed or altered from any source */
32 /*****************************************************************************/
53 /*****************************************************************************/
55 /*****************************************************************************/
59 /* Import symbol structure */
60 typedef struct Import Import;
62 Import* Next; /* Single linked list */
63 ObjData* Obj; /* Object file that imports the name */
64 FilePos Pos; /* File position of reference */
66 struct Export* Exp; /* Matching export for this import */
67 const char* Name; /* Name if not in table */
69 unsigned char Type; /* Type of import */
74 /* Export symbol structure */
75 typedef struct Export Export;
77 Export* Next; /* Hash table link */
78 unsigned Flags; /* Generic flags */
79 ObjData* Obj; /* Object file that exports the name */
80 unsigned ImpCount; /* How many imports for this symbol? */
81 Import* ImpList; /* List of imports for this symbol */
82 FilePos Pos; /* File position of definition */
83 ExprNode* Expr; /* Expression (0 if not def'd) */
84 unsigned char Type; /* Type of export */
85 char* Name; /* Name - dynamically allocated */
90 /* Prototype of a function that is called if an undefined symbol is found. It
91 * may check if the symbol is an external symbol (for binary formats that
92 * support externals) and will return zero if the symbol could not be
93 * resolved, or a value != zero if the symbol could be resolved. The
94 * CheckExports routine will print out the missing symbol in the first case.
96 typedef int (*ExpCheckFunc) (const char* Name, void* Data);
100 /*****************************************************************************/
102 /*****************************************************************************/
106 Import* ReadImport (FILE* F, ObjData* Obj);
107 /* Read an import from a file and insert it into the table */
109 void InsertImport (Import* I);
110 /* Insert an import into the table */
112 Export* ReadExport (FILE* F, ObjData* Obj);
113 /* Read an export from a file */
115 void InsertExport (Export* E);
116 /* Insert an exported identifier and check if it's already in the list */
118 Export* CreateConstExport (const char* Name, long Value);
119 /* Create an export for a literal date */
121 Export* CreateMemExport (const char* Name, Memory* Mem, unsigned long Offs);
122 /* Create an relative export for a memory area offset */
124 int IsUnresolved (const char* Name);
125 /* Check if this symbol is an unresolved export */
127 int IsConstExport (const Export* E);
128 /* Return true if the expression associated with this export is const */
130 long GetExportVal (const Export* E);
131 /* Get the value of this export */
133 void CheckExports (ExpCheckFunc F, void* Data);
134 /* Check if there are any unresolved symbols. On unresolved symbols, F is
135 * called (see the comments on ExpCheckFunc in the data section).
138 void PrintExportMap (FILE* F);
139 /* Print an export map to the given file */
141 void PrintImportMap (FILE* F);
142 /* Print an import map to the given file */
144 void PrintExportLabels (FILE* F);
145 /* Print the exports in a VICE label file */
147 void MarkExport (Export* E);
148 /* Mark the export */
150 void UnmarkExport (Export* E);
151 /* Remove the mark from the export */
153 int ExportHasMark (Export* E);
154 /* Return true if the export has a mark */
156 void CircularRefError (const Export* E);
157 /* Print an error about a circular reference using to define the given export */
161 /* End of exports.h */