1 /*****************************************************************************/
5 /* Symbol table entry forward for the ca65 macroassembler */
9 /* (C) 1998-2011, Ullrich von Bassewitz */
10 /* Roemerstrasse 52 */
11 /* D-70794 Filderstadt */
12 /* EMail: uz@cc65.org */
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 /* Bits for the Flags value in SymEntry */
60 #define SF_NONE 0x0000 /* Empty flag set */
61 #define SF_USER 0x0001 /* User bit */
62 #define SF_UNUSED 0x0002 /* Unused entry */
63 #define SF_EXPORT 0x0004 /* Export this symbol */
64 #define SF_IMPORT 0x0008 /* Import this symbol */
65 #define SF_GLOBAL 0x0010 /* Global symbol */
66 #define SF_LOCAL 0x0020 /* Cheap local symbol */
67 #define SF_LABEL 0x0080 /* Used as a label */
68 #define SF_VAR 0x0100 /* Variable symbol */
69 #define SF_FORCED 0x0400 /* Forced import, SF_IMPORT also set */
70 #define SF_MULTDEF 0x2000 /* Multiply defined symbol */
71 #define SF_DEFINED 0x4000 /* Defined */
72 #define SF_REFERENCED 0x8000 /* Referenced */
75 #define SF_REFIMP (SF_REFERENCED|SF_IMPORT) /* A ref'd import */
77 /* Arguments for SymFind... */
78 #define SYM_FIND_EXISTING 0
79 #define SYM_ALLOC_NEW 1
81 /* Structure of a symbol table entry */
82 typedef struct SymEntry SymEntry;
84 SymEntry* Left; /* Lexically smaller entry */
85 SymEntry* Right; /* Lexically larger entry */
86 SymEntry* List; /* List of all entries */
87 SymEntry* Locals; /* Root of subtree for local symbols */
89 struct SymTable* Tab; /* Table this symbol is in */
90 struct SymEntry* Entry;
92 Collection DefLines; /* Line infos for definition */
93 Collection RefLines; /* Line infos for references */
94 FilePos* GuessedUse[1]; /* File position where symbol
95 * address size was guessed, and the
96 * smallest possible addressing was NOT
97 * used. Currently only for zero page
100 unsigned Flags; /* Symbol flags */
101 unsigned DebugSymId; /* Debug symbol id */
102 unsigned ImportId; /* Id of import if this is one */
103 unsigned ExportId; /* Id of export if this is one */
104 struct ExprNode* Expr; /* Symbol expression */
105 Collection ExprRefs; /* Expressions using this symbol */
106 unsigned char ExportSize; /* Export address size */
107 unsigned char AddrSize; /* Address size of label */
108 unsigned char ConDesPrio[CD_TYPE_COUNT]; /* ConDes priorities... */
109 /* ...actually value+1 (used as flag) */
110 unsigned Name; /* Name index in global string pool */
113 /* List of all symbol table entries */
114 extern SymEntry* SymList;
116 /* Pointer to last defined symbol */
117 extern SymEntry* SymLast;
121 /*****************************************************************************/
123 /*****************************************************************************/
127 SymEntry* NewSymEntry (const StrBuf* Name, unsigned Flags);
128 /* Allocate a symbol table entry, initialize and return it */
130 int SymSearchTree (SymEntry* T, const StrBuf* Name, SymEntry** E);
131 /* Search in the given tree for a name. If we find the symbol, the function
132 * will return 0 and put the entry pointer into E. If we did not find the
133 * symbol, and the tree is empty, E is set to NULL. If the tree is not empty,
134 * E will be set to the last entry, and the result of the function is <0 if
135 * the entry should be inserted on the left side, and >0 if it should get
136 * inserted on the right side.
139 #if defined(HAVE_INLINE)
140 INLINE void SymAddExprRef (SymEntry* Sym, struct ExprNode* Expr)
141 /* Add an expression reference to this symbol */
143 CollAppend (&Sym->ExprRefs, Expr);
146 #define SymAddExprRef(Sym,Expr) CollAppend (&(Sym)->ExprRefs, Expr)
149 #if defined(HAVE_INLINE)
150 INLINE void SymDelExprRef (SymEntry* Sym, struct ExprNode* Expr)
151 /* Delete an expression reference to this symbol */
153 CollDeleteItem (&Sym->ExprRefs, Expr);
156 #define SymDelExprRef(Sym,Expr) CollDeleteItem (&(Sym)->ExprRefs, Expr)
159 void SymTransferExprRefs (SymEntry* From, SymEntry* To);
160 /* Transfer all expression references from one symbol to another. */
162 void SymDef (SymEntry* Sym, ExprNode* Expr, unsigned char AddrSize, unsigned Flags);
163 /* Mark a symbol as defined */
165 void SymRef (SymEntry* Sym);
166 /* Mark the given symbol as referenced */
168 void SymImport (SymEntry* Sym, unsigned char AddrSize, unsigned Flags);
169 /* Mark the given symbol as an imported symbol */
171 void SymExport (SymEntry* Sym, unsigned char AddrSize, unsigned Flags);
172 /* Mark the given symbol as an exported symbol */
174 void SymGlobal (SymEntry* Sym, unsigned char AddrSize, unsigned Flags);
175 /* Mark the given symbol as a global symbol, that is, as a symbol that is
176 * either imported or exported.
179 void SymConDes (SymEntry* Sym, unsigned char AddrSize, unsigned Type, unsigned Prio);
180 /* Mark the given symbol as a module constructor/destructor. This will also
181 * mark the symbol as an export. Initializers may never be zero page symbols.
184 void SymGuessedAddrSize (SymEntry* Sym, unsigned char AddrSize);
185 /* Mark the address size of the given symbol as guessed. The address size
186 * passed as argument is the one NOT used, because the actual address size
187 * wasn't known. Example: Zero page addressing was not used because symbol
188 * is undefined, and absolute addressing was available.
191 void SymExportFromGlobal (SymEntry* S);
192 /* Called at the end of assembly. Converts a global symbol that is defined
196 void SymImportFromGlobal (SymEntry* S);
197 /* Called at the end of assembly. Converts a global symbol that is undefined
201 #if defined(HAVE_INLINE)
202 INLINE int SymIsDef (const SymEntry* S)
203 /* Return true if the given symbol is already defined */
205 return (S->Flags & SF_DEFINED) != 0;
208 # define SymIsDef(S) (((S)->Flags & SF_DEFINED) != 0)
211 #if defined(HAVE_INLINE)
212 INLINE int SymIsRef (const SymEntry* S)
213 /* Return true if the given symbol has been referenced */
215 return (S->Flags & SF_REFERENCED) != 0;
218 # define SymIsRef(S) (((S)->Flags & SF_REFERENCED) != 0)
221 #if defined(HAVE_INLINE)
222 INLINE int SymIsImport (const SymEntry* S)
223 /* Return true if the given symbol is marked as import */
225 /* Check the import flag */
226 return (S->Flags & SF_IMPORT) != 0;
229 # define SymIsImport(S) (((S)->Flags & SF_IMPORT) != 0)
232 #if defined(HAVE_INLINE)
233 INLINE int SymIsExport (const SymEntry* S)
234 /* Return true if the given symbol is marked as export */
236 /* Check the export flag */
237 return (S->Flags & SF_EXPORT) != 0;
240 # define SymIsExport(S) (((S)->Flags & SF_EXPORT) != 0)
243 #if defined(HAVE_INLINE)
244 INLINE int SymIsVar (const SymEntry* S)
245 /* Return true if the given symbol is marked as variable */
247 /* Check the variable flag */
248 return (S->Flags & SF_VAR) != 0;
251 # define SymIsVar(S) (((S)->Flags & SF_VAR) != 0)
254 int SymIsConst (const SymEntry* Sym, long* Val);
255 /* Return true if the given symbol has a constant value. If Val is not NULL
256 * and the symbol has a constant value, store it's value there.
259 #if defined(HAVE_INLINE)
260 INLINE int SymHasExpr (const SymEntry* S)
261 /* Return true if the given symbol has an associated expression */
263 /* Check the expression */
264 return ((S->Flags & (SF_DEFINED|SF_IMPORT)) == SF_DEFINED);
267 # define SymHasExpr(S) (((S)->Flags & (SF_DEFINED|SF_IMPORT)) == SF_DEFINED)
270 #if defined(HAVE_INLINE)
271 INLINE void SymMarkUser (SymEntry* S)
272 /* Set a user mark on the specified symbol */
278 # define SymMarkUser(S) ((S)->Flags |= SF_USER)
281 #if defined(HAVE_INLINE)
282 INLINE void SymUnmarkUser (SymEntry* S)
283 /* Remove a user mark from the specified symbol */
286 S->Flags &= ~SF_USER;
289 # define SymUnmarkUser(S) ((S)->Flags &= ~SF_USER)
292 #if defined(HAVE_INLINE)
293 INLINE int SymHasUserMark (SymEntry* S)
294 /* Return the state of the user mark for the specified symbol */
297 return (S->Flags & SF_USER) != 0;
300 # define SymHasUserMark(S) (((S)->Flags & SF_USER) != 0)
303 struct SymTable* GetSymParentScope (SymEntry* S);
304 /* Get the parent scope of the symbol (not the one it is defined in). Return
305 * NULL if the symbol is a cheap local, or defined on global level.
308 struct ExprNode* GetSymExpr (SymEntry* Sym);
309 /* Get the expression for a non-const symbol */
311 const struct ExprNode* SymResolve (const SymEntry* Sym);
312 /* Helper function for DumpExpr. Resolves a symbol into an expression or return
313 * NULL. Do not call in other contexts!
316 #if defined(HAVE_INLINE)
317 INLINE const StrBuf* GetSymName (const SymEntry* S)
318 /* Return the name of the symbol */
320 return GetStrBuf (S->Name);
323 # define GetSymName(S) GetStrBuf ((S)->Name)
326 #if defined(HAVE_INLINE)
327 INLINE unsigned char GetSymAddrSize (const SymEntry* S)
328 /* Return the address size of the symbol. Beware: This function will just
329 * return the AddrSize member, it will not look at the expression!
335 # define GetSymAddrSize(S) ((S)->AddrSize)
338 long GetSymVal (SymEntry* Sym);
339 /* Return the value of a symbol assuming it's constant. FAIL will be called
340 * in case the symbol is undefined or not constant.
343 unsigned GetSymImportId (const SymEntry* Sym);
344 /* Return the import id for the given symbol */
346 unsigned GetSymExportId (const SymEntry* Sym);
347 /* Return the export id for the given symbol */
349 unsigned GetSymInfoFlags (const SymEntry* Sym, long* ConstVal);
350 /* Return a set of flags used when writing symbol information into a file.
351 * If the SYM_CONST bit is set, ConstVal will contain the constant value
352 * of the symbol. The result does not include the condes count.
353 * See common/symdefs.h for more information.
358 /* End of symentry.h */