1 /*****************************************************************************/
5 /* Symbol table entry forward for the ca65 macroassembler */
9 /* (C) 1998-2012, 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 0x0040 /* Used as a label */
71 #define SF_VAR 0x0080 /* Variable symbol */
72 #define SF_FORCED 0x0100 /* Forced import, SF_IMPORT also set */
73 #define SF_FIXED 0x0200 /* May not be trampoline */
74 #define SF_MULTDEF 0x1000 /* Multiply defined symbol */
75 #define SF_DEFINED 0x2000 /* Defined */
76 #define SF_REFERENCED 0x4000 /* Referenced */
79 #define SF_REFIMP (SF_REFERENCED|SF_IMPORT) /* A ref'd import */
81 /* Arguments for SymFind... */
82 #define SYM_FIND_EXISTING 0
83 #define SYM_ALLOC_NEW 1
85 /* Structure of a symbol table entry */
86 typedef struct SymEntry SymEntry;
88 SymEntry* Left; /* Lexically smaller entry */
89 SymEntry* Right; /* Lexically larger entry */
90 SymEntry* List; /* List of all entries */
91 SymEntry* Locals; /* Root of subtree for local symbols */
93 struct SymTable* Tab; /* Table this symbol is in */
94 struct SymEntry* Entry; /* Parent for cheap locals */
96 Collection DefLines; /* Line infos for definition */
97 Collection RefLines; /* Line infos for references */
98 FilePos* GuessedUse[1]; /* File position where symbol
99 * address size was guessed, and the
100 * smallest possible addressing was NOT
101 * used. Currently only for zero page
104 struct HLLDbgSym* HLLSym; /* Symbol from high level language */
105 unsigned Flags; /* Symbol flags */
106 unsigned DebugSymId; /* Debug symbol id */
107 unsigned ImportId; /* Id of import if this is one */
108 unsigned ExportId; /* Id of export if this is one */
109 struct ExprNode* Expr; /* Symbol expression */
110 Collection ExprRefs; /* Expressions using this symbol */
111 unsigned char ExportSize; /* Export address size */
112 unsigned char AddrSize; /* Address size of label */
113 unsigned char ConDesPrio[CD_TYPE_COUNT]; /* ConDes priorities... */
114 /* ...actually value+1 (used as flag) */
115 unsigned Name; /* Name index in global string pool */
118 /* List of all symbol table entries */
119 extern SymEntry* SymList;
121 /* Pointer to last defined symbol */
122 extern SymEntry* SymLast;
126 /*****************************************************************************/
128 /*****************************************************************************/
132 SymEntry* NewSymEntry (const StrBuf* Name, unsigned Flags);
133 /* Allocate a symbol table entry, initialize and return it */
135 int SymSearchTree (SymEntry* T, const StrBuf* Name, SymEntry** E);
136 /* Search in the given tree for a name. If we find the symbol, the function
137 * will return 0 and put the entry pointer into E. If we did not find the
138 * symbol, and the tree is empty, E is set to NULL. If the tree is not empty,
139 * E will be set to the last entry, and the result of the function is <0 if
140 * the entry should be inserted on the left side, and >0 if it should get
141 * inserted on the right side.
144 #if defined(HAVE_INLINE)
145 INLINE void SymAddExprRef (SymEntry* Sym, struct ExprNode* Expr)
146 /* Add an expression reference to this symbol */
148 CollAppend (&Sym->ExprRefs, Expr);
151 #define SymAddExprRef(Sym,Expr) CollAppend (&(Sym)->ExprRefs, Expr)
154 #if defined(HAVE_INLINE)
155 INLINE void SymDelExprRef (SymEntry* Sym, struct ExprNode* Expr)
156 /* Delete an expression reference to this symbol */
158 CollDeleteItem (&Sym->ExprRefs, Expr);
161 #define SymDelExprRef(Sym,Expr) CollDeleteItem (&(Sym)->ExprRefs, Expr)
164 void SymTransferExprRefs (SymEntry* From, SymEntry* To);
165 /* Transfer all expression references from one symbol to another. */
167 void SymDef (SymEntry* Sym, ExprNode* Expr, unsigned char AddrSize, unsigned Flags);
168 /* Mark a symbol as defined */
170 void SymRef (SymEntry* Sym);
171 /* Mark the given symbol as referenced */
173 void SymImport (SymEntry* Sym, unsigned char AddrSize, unsigned Flags);
174 /* Mark the given symbol as an imported symbol */
176 void SymExport (SymEntry* Sym, unsigned char AddrSize, unsigned Flags);
177 /* Mark the given symbol as an exported symbol */
179 void SymGlobal (SymEntry* Sym, unsigned char AddrSize, unsigned Flags);
180 /* Mark the given symbol as a global symbol, that is, as a symbol that is
181 * either imported or exported.
184 void SymConDes (SymEntry* Sym, unsigned char AddrSize, unsigned Type, unsigned Prio);
185 /* Mark the given symbol as a module constructor/destructor. This will also
186 * mark the symbol as an export. Initializers may never be zero page symbols.
189 void SymGuessedAddrSize (SymEntry* Sym, unsigned char AddrSize);
190 /* Mark the address size of the given symbol as guessed. The address size
191 * passed as argument is the one NOT used, because the actual address size
192 * wasn't known. Example: Zero page addressing was not used because symbol
193 * is undefined, and absolute addressing was available.
196 void SymExportFromGlobal (SymEntry* S);
197 /* Called at the end of assembly. Converts a global symbol that is defined
201 void SymImportFromGlobal (SymEntry* S);
202 /* Called at the end of assembly. Converts a global symbol that is undefined
206 #if defined(HAVE_INLINE)
207 INLINE int SymIsDef (const SymEntry* S)
208 /* Return true if the given symbol is already defined */
210 return (S->Flags & SF_DEFINED) != 0;
213 # define SymIsDef(S) (((S)->Flags & SF_DEFINED) != 0)
216 #if defined(HAVE_INLINE)
217 INLINE int SymIsRef (const SymEntry* S)
218 /* Return true if the given symbol has been referenced */
220 return (S->Flags & SF_REFERENCED) != 0;
223 # define SymIsRef(S) (((S)->Flags & SF_REFERENCED) != 0)
226 #if defined(HAVE_INLINE)
227 INLINE int SymIsImport (const SymEntry* S)
228 /* Return true if the given symbol is marked as import */
230 /* Check the import flag */
231 return (S->Flags & SF_IMPORT) != 0;
234 # define SymIsImport(S) (((S)->Flags & SF_IMPORT) != 0)
237 #if defined(HAVE_INLINE)
238 INLINE int SymIsExport (const SymEntry* S)
239 /* Return true if the given symbol is marked as export */
241 /* Check the export flag */
242 return (S->Flags & SF_EXPORT) != 0;
245 # define SymIsExport(S) (((S)->Flags & SF_EXPORT) != 0)
248 #if defined(HAVE_INLINE)
249 INLINE int SymIsVar (const SymEntry* S)
250 /* Return true if the given symbol is marked as variable */
252 /* Check the variable flag */
253 return (S->Flags & SF_VAR) != 0;
256 # define SymIsVar(S) (((S)->Flags & SF_VAR) != 0)
259 int SymIsConst (const SymEntry* Sym, long* Val);
260 /* Return true if the given symbol has a constant value. If Val is not NULL
261 * and the symbol has a constant value, store it's value there.
264 #if defined(HAVE_INLINE)
265 INLINE int SymHasExpr (const SymEntry* S)
266 /* Return true if the given symbol has an associated expression */
268 /* Check the expression */
269 return ((S->Flags & (SF_DEFINED|SF_IMPORT)) == SF_DEFINED);
272 # define SymHasExpr(S) (((S)->Flags & (SF_DEFINED|SF_IMPORT)) == SF_DEFINED)
275 #if defined(HAVE_INLINE)
276 INLINE void SymMarkUser (SymEntry* S)
277 /* Set a user mark on the specified symbol */
283 # define SymMarkUser(S) ((S)->Flags |= SF_USER)
286 #if defined(HAVE_INLINE)
287 INLINE void SymUnmarkUser (SymEntry* S)
288 /* Remove a user mark from the specified symbol */
291 S->Flags &= ~SF_USER;
294 # define SymUnmarkUser(S) ((S)->Flags &= ~SF_USER)
297 #if defined(HAVE_INLINE)
298 INLINE int SymHasUserMark (SymEntry* S)
299 /* Return the state of the user mark for the specified symbol */
302 return (S->Flags & SF_USER) != 0;
305 # define SymHasUserMark(S) (((S)->Flags & SF_USER) != 0)
308 struct SymTable* GetSymParentScope (SymEntry* S);
309 /* Get the parent scope of the symbol (not the one it is defined in). Return
310 * NULL if the symbol is a cheap local, or defined on global level.
313 struct ExprNode* GetSymExpr (SymEntry* Sym);
314 /* Get the expression for a non-const symbol */
316 const struct ExprNode* SymResolve (const SymEntry* Sym);
317 /* Helper function for DumpExpr. Resolves a symbol into an expression or return
318 * NULL. Do not call in other contexts!
321 #if defined(HAVE_INLINE)
322 INLINE const StrBuf* GetSymName (const SymEntry* S)
323 /* Return the name of the symbol */
325 return GetStrBuf (S->Name);
328 # define GetSymName(S) GetStrBuf ((S)->Name)
331 #if defined(HAVE_INLINE)
332 INLINE unsigned char GetSymAddrSize (const SymEntry* S)
333 /* Return the address size of the symbol. Beware: This function will just
334 * return the AddrSize member, it will not look at the expression!
340 # define GetSymAddrSize(S) ((S)->AddrSize)
343 long GetSymVal (SymEntry* Sym);
344 /* Return the value of a symbol assuming it's constant. FAIL will be called
345 * in case the symbol is undefined or not constant.
348 unsigned GetSymImportId (const SymEntry* Sym);
349 /* Return the import id for the given symbol */
351 unsigned GetSymExportId (const SymEntry* Sym);
352 /* Return the export id for the given symbol */
354 unsigned GetSymInfoFlags (const SymEntry* Sym, long* ConstVal);
355 /* Return a set of flags used when writing symbol information into a file.
356 * If the SYM_CONST bit is set, ConstVal will contain the constant value
357 * of the symbol. The result does not include the condes count.
358 * See common/symdefs.h for more information.
363 /* End of symentry.h */