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 /*****************************************************************************/
62 /* Bits for the Flags value in SymEntry */
63 #define SF_NONE 0x0000 /* Empty flag set */
64 #define SF_USER 0x0001 /* User bit */
65 #define SF_UNUSED 0x0002 /* Unused entry */
66 #define SF_EXPORT 0x0004 /* Export this symbol */
67 #define SF_IMPORT 0x0008 /* Import this symbol */
68 #define SF_GLOBAL 0x0010 /* Global symbol */
69 #define SF_LOCAL 0x0020 /* Cheap local symbol */
70 #define SF_LABEL 0x0080 /* Used as a label */
71 #define SF_VAR 0x0100 /* Variable symbol */
72 #define SF_FORCED 0x0400 /* Forced import, SF_IMPORT also set */
73 #define SF_MULTDEF 0x2000 /* Multiply defined symbol */
74 #define SF_DEFINED 0x4000 /* Defined */
75 #define SF_REFERENCED 0x8000 /* Referenced */
78 #define SF_REFIMP (SF_REFERENCED|SF_IMPORT) /* A ref'd import */
80 /* Arguments for SymFind... */
81 #define SYM_FIND_EXISTING 0
82 #define SYM_ALLOC_NEW 1
84 /* Structure of a symbol table entry */
85 typedef struct SymEntry SymEntry;
87 SymEntry* Left; /* Lexically smaller entry */
88 SymEntry* Right; /* Lexically larger entry */
89 SymEntry* List; /* List of all entries */
90 SymEntry* Locals; /* Root of subtree for local symbols */
92 struct SymTable* Tab; /* Table this symbol is in */
93 struct SymEntry* Entry; /* Parent for cheap locals */
95 Collection DefLines; /* Line infos for definition */
96 Collection RefLines; /* Line infos for references */
97 FilePos* GuessedUse[1]; /* File position where symbol
98 * address size was guessed, and the
99 * smallest possible addressing was NOT
100 * used. Currently only for zero page
103 struct HLLDbgSym* HLLSym; /* Symbol from high level language */
104 unsigned Flags; /* Symbol flags */
105 unsigned DebugSymId; /* Debug symbol id */
106 unsigned ImportId; /* Id of import if this is one */
107 unsigned ExportId; /* Id of export if this is one */
108 struct ExprNode* Expr; /* Symbol expression */
109 Collection ExprRefs; /* Expressions using this symbol */
110 unsigned char ExportSize; /* Export address size */
111 unsigned char AddrSize; /* Address size of label */
112 unsigned char ConDesPrio[CD_TYPE_COUNT]; /* ConDes priorities... */
113 /* ...actually value+1 (used as flag) */
114 unsigned Name; /* Name index in global string pool */
117 /* List of all symbol table entries */
118 extern SymEntry* SymList;
120 /* Pointer to last defined symbol */
121 extern SymEntry* SymLast;
125 /*****************************************************************************/
127 /*****************************************************************************/
131 SymEntry* NewSymEntry (const StrBuf* Name, unsigned Flags);
132 /* Allocate a symbol table entry, initialize and return it */
134 int SymSearchTree (SymEntry* T, const StrBuf* Name, SymEntry** E);
135 /* Search in the given tree for a name. If we find the symbol, the function
136 * will return 0 and put the entry pointer into E. If we did not find the
137 * symbol, and the tree is empty, E is set to NULL. If the tree is not empty,
138 * E will be set to the last entry, and the result of the function is <0 if
139 * the entry should be inserted on the left side, and >0 if it should get
140 * inserted on the right side.
143 #if defined(HAVE_INLINE)
144 INLINE void SymAddExprRef (SymEntry* Sym, struct ExprNode* Expr)
145 /* Add an expression reference to this symbol */
147 CollAppend (&Sym->ExprRefs, Expr);
150 #define SymAddExprRef(Sym,Expr) CollAppend (&(Sym)->ExprRefs, Expr)
153 #if defined(HAVE_INLINE)
154 INLINE void SymDelExprRef (SymEntry* Sym, struct ExprNode* Expr)
155 /* Delete an expression reference to this symbol */
157 CollDeleteItem (&Sym->ExprRefs, Expr);
160 #define SymDelExprRef(Sym,Expr) CollDeleteItem (&(Sym)->ExprRefs, Expr)
163 void SymTransferExprRefs (SymEntry* From, SymEntry* To);
164 /* Transfer all expression references from one symbol to another. */
166 void SymDef (SymEntry* Sym, ExprNode* Expr, unsigned char AddrSize, unsigned Flags);
167 /* Mark a symbol as defined */
169 void SymRef (SymEntry* Sym);
170 /* Mark the given symbol as referenced */
172 void SymImport (SymEntry* Sym, unsigned char AddrSize, unsigned Flags);
173 /* Mark the given symbol as an imported symbol */
175 void SymExport (SymEntry* Sym, unsigned char AddrSize, unsigned Flags);
176 /* Mark the given symbol as an exported symbol */
178 void SymGlobal (SymEntry* Sym, unsigned char AddrSize, unsigned Flags);
179 /* Mark the given symbol as a global symbol, that is, as a symbol that is
180 * either imported or exported.
183 void SymConDes (SymEntry* Sym, unsigned char AddrSize, unsigned Type, unsigned Prio);
184 /* Mark the given symbol as a module constructor/destructor. This will also
185 * mark the symbol as an export. Initializers may never be zero page symbols.
188 void SymGuessedAddrSize (SymEntry* Sym, unsigned char AddrSize);
189 /* Mark the address size of the given symbol as guessed. The address size
190 * passed as argument is the one NOT used, because the actual address size
191 * wasn't known. Example: Zero page addressing was not used because symbol
192 * is undefined, and absolute addressing was available.
195 void SymExportFromGlobal (SymEntry* S);
196 /* Called at the end of assembly. Converts a global symbol that is defined
200 void SymImportFromGlobal (SymEntry* S);
201 /* Called at the end of assembly. Converts a global symbol that is undefined
205 #if defined(HAVE_INLINE)
206 INLINE int SymIsDef (const SymEntry* S)
207 /* Return true if the given symbol is already defined */
209 return (S->Flags & SF_DEFINED) != 0;
212 # define SymIsDef(S) (((S)->Flags & SF_DEFINED) != 0)
215 #if defined(HAVE_INLINE)
216 INLINE int SymIsRef (const SymEntry* S)
217 /* Return true if the given symbol has been referenced */
219 return (S->Flags & SF_REFERENCED) != 0;
222 # define SymIsRef(S) (((S)->Flags & SF_REFERENCED) != 0)
225 #if defined(HAVE_INLINE)
226 INLINE int SymIsImport (const SymEntry* S)
227 /* Return true if the given symbol is marked as import */
229 /* Check the import flag */
230 return (S->Flags & SF_IMPORT) != 0;
233 # define SymIsImport(S) (((S)->Flags & SF_IMPORT) != 0)
236 #if defined(HAVE_INLINE)
237 INLINE int SymIsExport (const SymEntry* S)
238 /* Return true if the given symbol is marked as export */
240 /* Check the export flag */
241 return (S->Flags & SF_EXPORT) != 0;
244 # define SymIsExport(S) (((S)->Flags & SF_EXPORT) != 0)
247 #if defined(HAVE_INLINE)
248 INLINE int SymIsVar (const SymEntry* S)
249 /* Return true if the given symbol is marked as variable */
251 /* Check the variable flag */
252 return (S->Flags & SF_VAR) != 0;
255 # define SymIsVar(S) (((S)->Flags & SF_VAR) != 0)
258 int SymIsConst (const SymEntry* Sym, long* Val);
259 /* Return true if the given symbol has a constant value. If Val is not NULL
260 * and the symbol has a constant value, store it's value there.
263 #if defined(HAVE_INLINE)
264 INLINE int SymHasExpr (const SymEntry* S)
265 /* Return true if the given symbol has an associated expression */
267 /* Check the expression */
268 return ((S->Flags & (SF_DEFINED|SF_IMPORT)) == SF_DEFINED);
271 # define SymHasExpr(S) (((S)->Flags & (SF_DEFINED|SF_IMPORT)) == SF_DEFINED)
274 #if defined(HAVE_INLINE)
275 INLINE void SymMarkUser (SymEntry* S)
276 /* Set a user mark on the specified symbol */
282 # define SymMarkUser(S) ((S)->Flags |= SF_USER)
285 #if defined(HAVE_INLINE)
286 INLINE void SymUnmarkUser (SymEntry* S)
287 /* Remove a user mark from the specified symbol */
290 S->Flags &= ~SF_USER;
293 # define SymUnmarkUser(S) ((S)->Flags &= ~SF_USER)
296 #if defined(HAVE_INLINE)
297 INLINE int SymHasUserMark (SymEntry* S)
298 /* Return the state of the user mark for the specified symbol */
301 return (S->Flags & SF_USER) != 0;
304 # define SymHasUserMark(S) (((S)->Flags & SF_USER) != 0)
307 struct SymTable* GetSymParentScope (SymEntry* S);
308 /* Get the parent scope of the symbol (not the one it is defined in). Return
309 * NULL if the symbol is a cheap local, or defined on global level.
312 struct ExprNode* GetSymExpr (SymEntry* Sym);
313 /* Get the expression for a non-const symbol */
315 const struct ExprNode* SymResolve (const SymEntry* Sym);
316 /* Helper function for DumpExpr. Resolves a symbol into an expression or return
317 * NULL. Do not call in other contexts!
320 #if defined(HAVE_INLINE)
321 INLINE const StrBuf* GetSymName (const SymEntry* S)
322 /* Return the name of the symbol */
324 return GetStrBuf (S->Name);
327 # define GetSymName(S) GetStrBuf ((S)->Name)
330 #if defined(HAVE_INLINE)
331 INLINE unsigned char GetSymAddrSize (const SymEntry* S)
332 /* Return the address size of the symbol. Beware: This function will just
333 * return the AddrSize member, it will not look at the expression!
339 # define GetSymAddrSize(S) ((S)->AddrSize)
342 long GetSymVal (SymEntry* Sym);
343 /* Return the value of a symbol assuming it's constant. FAIL will be called
344 * in case the symbol is undefined or not constant.
347 unsigned GetSymImportId (const SymEntry* Sym);
348 /* Return the import id for the given symbol */
350 unsigned GetSymExportId (const SymEntry* Sym);
351 /* Return the export id for the given symbol */
353 unsigned GetSymInfoFlags (const SymEntry* Sym, long* ConstVal);
354 /* Return a set of flags used when writing symbol information into a file.
355 * If the SYM_CONST bit is set, ConstVal will contain the constant value
356 * of the symbol. The result does not include the condes count.
357 * See common/symdefs.h for more information.
362 /* End of symentry.h */