/*****************************************************************************/
/* */
-/* symentry.c */
+/* symentry.c */
/* */
-/* Symbol table entry forward for the ca65 macroassembler */
+/* Symbol table entry for the ca65 macroassembler */
/* */
/* */
/* */
-/* (C) 1998-2003 Ullrich von Bassewitz */
-/* Römerstraße 52 */
-/* D-70794 Filderstadt */
-/* EMail: uz@cc65.org */
+/* (C) 1998-2011, Ullrich von Bassewitz */
+/* Roemerstrasse 52 */
+/* D-70794 Filderstadt */
+/* EMail: uz@cc65.org */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
/* common */
#include "addrsize.h"
+#include "symdefs.h"
#include "xmalloc.h"
/* ca65 */
#include "scanner.h"
#include "segment.h"
#include "spool.h"
+#include "studyexpr.h" /* ### */
#include "symentry.h"
#include "symtab.h"
/*****************************************************************************/
-/* Data */
+/* Data */
/*****************************************************************************/
/*****************************************************************************/
-/* Code */
+/* Code */
/*****************************************************************************/
-int IsLocalName (const char* Name)
-/* Return true if Name is the name of a local symbol */
+SymEntry* NewSymEntry (const StrBuf* Name, unsigned Flags)
+/* Allocate a symbol table entry, initialize and return it */
{
- return (*Name == LocalStart);
+ unsigned I;
+
+ /* Allocate memory */
+ SymEntry* S = xmalloc (sizeof (SymEntry));
+
+ /* Initialize the entry */
+ S->Left = 0;
+ S->Right = 0;
+ S->Locals = 0;
+ S->Sym.Tab = 0;
+ S->DefLines = EmptyCollection;
+ S->RefLines = EmptyCollection;
+ for (I = 0; I < sizeof (S->GuessedUse) / sizeof (S->GuessedUse[0]); ++I) {
+ S->GuessedUse[I] = 0;
+ }
+ S->HLLSym = 0;
+ S->Flags = Flags;
+ S->DebugSymId = ~0U;
+ S->ImportId = ~0U;
+ S->ExportId = ~0U;
+ S->Expr = 0;
+ S->ExprRefs = AUTO_COLLECTION_INITIALIZER;
+ S->ExportSize = ADDR_SIZE_DEFAULT;
+ S->AddrSize = ADDR_SIZE_DEFAULT;
+ memset (S->ConDesPrio, 0, sizeof (S->ConDesPrio));
+ S->Name = GetStrBufId (Name);
+
+ /* Insert it into the list of all entries */
+ S->List = SymList;
+ SymList = S;
+
+ /* Return the initialized entry */
+ return S;
}
-int IsLocalNameId (unsigned Name)
-/* Return true if Name is the name of a local symbol */
+int SymSearchTree (SymEntry* T, const StrBuf* Name, SymEntry** E)
+/* Search in the given tree for a name. If we find the symbol, the function
+ * will return 0 and put the entry pointer into E. If we did not find the
+ * symbol, and the tree is empty, E is set to NULL. If the tree is not empty,
+ * E will be set to the last entry, and the result of the function is <0 if
+ * the entry should be inserted on the left side, and >0 if it should get
+ * inserted on the right side.
+ */
{
- return (*GetString (Name) == LocalStart);
+ /* Is there a tree? */
+ if (T == 0) {
+ *E = 0;
+ return 1;
+ }
+
+ /* We have a table, search it */
+ while (1) {
+
+ /* Get the symbol name */
+ const StrBuf* SymName = GetStrBuf (T->Name);
+
+ /* Choose next entry */
+ int Cmp = SB_Compare (Name, SymName);
+ if (Cmp < 0 && T->Left) {
+ T = T->Left;
+ } else if (Cmp > 0 && T->Right) {
+ T = T->Right;
+ } else {
+ /* Found or end of search, return the result */
+ *E = T;
+ return Cmp;
+ }
+ }
}
-static unsigned SymAddrSize (const SymEntry* S)
-/* Get the default address size for a symbol. */
+void SymTransferExprRefs (SymEntry* From, SymEntry* To)
+/* Transfer all expression references from one symbol to another. */
{
- /* Local symbols are always near (is this ok?) */
- if (IsLocalNameId (S->Name)) {
- return ADDR_SIZE_ABS;
+ unsigned I;
+
+ for (I = 0; I < CollCount (&From->ExprRefs); ++I) {
+
+ /* Get the expression node */
+ ExprNode* E = CollAtUnchecked (&From->ExprRefs, I);
+
+ /* Safety */
+ CHECK (E->Op == EXPR_SYMBOL && E->V.Sym == From);
+
+ /* Replace the symbol reference */
+ E->V.Sym = To;
+
+ /* Add the expression reference */
+ SymAddExprRef (To, E);
}
- /* Return the address size of the segment */
- return GetCurrentSegAddrSize ();
+ /* Remove all symbol references from the old symbol */
+ CollDeleteAll (&From->ExprRefs);
}
-SymEntry* NewSymEntry (const char* Name)
-/* Allocate a symbol table entry, initialize and return it */
+static void SymReplaceExprRefs (SymEntry* S)
+/* Replace the references to this symbol by a copy of the symbol expression */
{
- /* Allocate memory */
- SymEntry* S = xmalloc (sizeof (SymEntry));
+ unsigned I;
+ long Val;
- /* Initialize the entry */
- S->Left = 0;
- S->Right = 0;
- S->Locals = 0;
- S->SymTab = 0;
- S->Pos = CurPos;
- S->Flags = 0;
- S->V.Expr = 0;
- S->ExprRefs = AUTO_COLLECTION_INITIALIZER;
- S->ExportSize = ADDR_SIZE_DEFAULT;
- S->AddrSize = ADDR_SIZE_DEFAULT;
- memset (S->ConDesPrio, 0, sizeof (S->ConDesPrio));
- S->Name = GetStringId (Name);
+ /* Check if the expression is const and get its value */
+ int IsConst = IsConstExpr (S->Expr, &Val);
+ CHECK (IsConst);
- /* Insert it into the list of all entries */
- S->List = SymList;
- SymList = S;
+ /* Loop over all references */
+ for (I = 0; I < CollCount (&S->ExprRefs); ++I) {
- /* Return the initialized entry */
- return S;
-}
+ /* Get the expression node */
+ ExprNode* E = CollAtUnchecked (&S->ExprRefs, I);
+ /* Safety */
+ CHECK (E->Op == EXPR_SYMBOL && E->V.Sym == S);
+ /* We cannot touch the root node, since there are pointers to it.
+ * Replace it by a literal node.
+ */
+ E->Op = EXPR_LITERAL;
+ E->V.IVal = Val;
+ }
-void SymRef (SymEntry* S)
-/* Mark the given symbol as referenced */
-{
- /* Mark the symbol as referenced */
- S->Flags |= SF_REFERENCED;
+ /* Remove all symbol references from the symbol */
+ CollDeleteAll (&S->ExprRefs);
}
/* Define a new symbol */
{
if (S->Flags & SF_IMPORT) {
- /* Defined symbol is marked as imported external symbol */
- Error ("Symbol `%s' is already an import", GetSymName (S));
- return;
+ /* Defined symbol is marked as imported external symbol */
+ Error ("Symbol `%m%p' is already an import", GetSymName (S));
+ return;
+ }
+ if ((Flags & SF_VAR) != 0 && (S->Flags & (SF_EXPORT | SF_GLOBAL))) {
+ /* Variable symbols cannot be exports or globals */
+ Error ("Var symbol `%m%p' cannot be an export or global symbol", GetSymName (S));
+ return;
}
if (S->Flags & SF_DEFINED) {
- /* Multiple definition */
- Error ("Symbol `%s' is already defined", GetSymName (S));
- S->Flags |= SF_MULTDEF;
- return;
+ /* Multiple definition. In case of a variable, this is legal. */
+ if ((S->Flags & SF_VAR) == 0) {
+ Error ("Symbol `%m%p' is already defined", GetSymName (S));
+ S->Flags |= SF_MULTDEF;
+ return;
+ } else {
+ /* Redefinition must also be a variable symbol */
+ if ((Flags & SF_VAR) == 0) {
+ Error ("Symbol `%m%p' is already different kind", GetSymName (S));
+ return;
+ }
+ /* Delete the current symbol expression, since it will get
+ * replaced
+ */
+ FreeExpr (S->Expr);
+ S->Expr = 0;
+ }
}
/* Map a default address size to a real value */
if (AddrSize == ADDR_SIZE_DEFAULT) {
- AddrSize = SymAddrSize (S);
+ /* ### Must go! Delay address size calculation until end of assembly! */
+ ExprDesc ED;
+ ED_Init (&ED);
+ StudyExpr (Expr, &ED);
+ AddrSize = ED.AddrSize;
+ ED_Done (&ED);
}
/* Set the symbol value */
- S->V.Expr = Expr;
+ S->Expr = Expr;
- /* If the symbol is marked as global, export it */
+ /* In case of a variable symbol, walk over all expressions containing
+ * this symbol and replace the (sub-)expression by the literal value of
+ * the tree. Be sure to replace the expression node in place, since there
+ * may be pointers to it.
+ */
+ if (Flags & SF_VAR) {
+ SymReplaceExprRefs (S);
+ }
+
+ /* If the symbol is marked as global, export it. Address size is checked
+ * below.
+ */
if (S->Flags & SF_GLOBAL) {
- S->ExportSize = S->AddrSize;
S->Flags = (S->Flags & ~SF_GLOBAL) | SF_EXPORT;
+ ReleaseFullLineInfo (&S->DefLines);
}
/* Mark the symbol as defined and use the given address size */
S->Flags |= (SF_DEFINED | Flags);
S->AddrSize = AddrSize;
+ /* Remember the line info of the symbol definition */
+ GetFullLineInfo (&S->DefLines);
+
/* If the symbol is exported, check the address sizes */
if (S->Flags & SF_EXPORT) {
if (S->ExportSize == ADDR_SIZE_DEFAULT) {
/* Use the real size of the symbol */
S->ExportSize = S->AddrSize;
} else if (S->AddrSize > S->ExportSize) {
- PWarning (GetSymPos (S), 1, "Symbol `%s' is %s but exported as %s",
- GetSymName (S), AddrSizeToStr (S->AddrSize),
- AddrSizeToStr (S->ExportSize));
+ /* We're exporting a symbol smaller than it actually is */
+ Warning (1, "Symbol `%m%p' is %s but exported %s",
+ GetSymName (S), AddrSizeToStr (S->AddrSize),
+ AddrSizeToStr (S->ExportSize));
}
}
- /* If the symbol is a ZP symbol, check if the value is in correct range */
- if (S->AddrSize == ADDR_SIZE_ZP) {
- /* Already marked as ZP symbol by some means */
- if (!IsByteExpr (Expr)) {
- Error ("Range error");
- }
- }
-
/* If this is not a local symbol, remember it as the last global one */
- if (!IsLocalNameId (S->Name)) {
- SymLast = S;
+ if ((S->Flags & SF_LOCAL) == 0) {
+ SymLast = S;
}
}
+void SymRef (SymEntry* S)
+/* Mark the given symbol as referenced */
+{
+ /* Mark the symbol as referenced */
+ S->Flags |= SF_REFERENCED;
+
+ /* Remember the current location */
+ CollAppend (&S->RefLines, GetAsmLineInfo ());
+}
+
+
+
void SymImport (SymEntry* S, unsigned char AddrSize, unsigned Flags)
/* Mark the given symbol as an imported symbol */
{
- /* Don't accept local symbols */
- if (IsLocalNameId (S->Name)) {
- Error ("Illegal use of a local symbol");
- return;
- }
-
if (S->Flags & SF_DEFINED) {
- Error ("Symbol `%s' is already defined", GetSymName (S));
- S->Flags |= SF_MULTDEF;
- return;
+ Error ("Symbol `%m%p' is already defined", GetSymName (S));
+ S->Flags |= SF_MULTDEF;
+ return;
}
if (S->Flags & SF_EXPORT) {
- /* The symbol is already marked as exported symbol */
- Error ("Cannot import exported symbol `%s'", GetSymName (S));
- return;
+ /* The symbol is already marked as exported symbol */
+ Error ("Cannot import exported symbol `%m%p'", GetSymName (S));
+ return;
}
- /* Map a default address size to a real value */
+ /* If no address size is given, use the address size of the enclosing
+ * segment.
+ */
if (AddrSize == ADDR_SIZE_DEFAULT) {
- AddrSize = SymAddrSize (S);
+ AddrSize = GetCurrentSegAddrSize ();
}
- /* If the symbol is marked as import or global, check the symbol flags,
- * then do silently remove the global flag
+ /* If the symbol is marked as import or global, check the address size,
+ * then do silently remove the global flag.
*/
if (S->Flags & SF_IMPORT) {
- if ((Flags & SF_FORCED) != (S->Flags & SF_FORCED)) {
- Error ("Redeclaration mismatch for symbol `%s'", GetSymName (S));
- }
+ if ((Flags & SF_FORCED) != (S->Flags & SF_FORCED)) {
+ Error ("Redeclaration mismatch for symbol `%m%p'", GetSymName (S));
+ }
if (AddrSize != S->AddrSize) {
- Error ("Address size mismatch for symbol `%s'", GetSymName (S));
+ Error ("Address size mismatch for symbol `%m%p'", GetSymName (S));
}
}
if (S->Flags & SF_GLOBAL) {
- if (S->AddrSize != ADDR_SIZE_DEFAULT && S->AddrSize != AddrSize) {
- Error ("Address size mismatch for symbol `%s'", GetSymName (S));
- }
S->Flags &= ~SF_GLOBAL;
+ if (AddrSize != S->AddrSize) {
+ Error ("Address size mismatch for symbol `%m%p'", GetSymName (S));
+ }
}
/* Set the symbol data */
S->Flags |= (SF_IMPORT | Flags);
S->AddrSize = AddrSize;
+
+ /* Mark the position of the import as the position of the definition.
+ * Please note: In case of multiple .global or .import statements, the line
+ * infos add up.
+ */
+ GetFullLineInfo (&S->DefLines);
}
void SymExport (SymEntry* S, unsigned char AddrSize, unsigned Flags)
/* Mark the given symbol as an exported symbol */
{
- /* Don't accept local symbols */
- if (IsLocalNameId (S->Name)) {
- Error ("Illegal use of a local symbol");
- return;
- }
-
/* Check if it's ok to export the symbol */
if (S->Flags & SF_IMPORT) {
- /* The symbol is already marked as imported external symbol */
- Error ("Symbol `%s' is already an import", GetSymName (S));
- return;
+ /* The symbol is already marked as imported external symbol */
+ Error ("Symbol `%m%p' is already an import", GetSymName (S));
+ return;
+ }
+ if (S->Flags & SF_VAR) {
+ /* Variable symbols cannot be exported */
+ Error ("Var symbol `%m%p' cannot be exported", GetSymName (S));
+ return;
}
- /* If the symbol was marked as global before, make it an export */
+ /* If the symbol was marked as global before, remove the global flag and
+ * proceed, but check the address size.
+ */
if (S->Flags & SF_GLOBAL) {
- S->ExportSize = S->AddrSize;
+ if (AddrSize != S->ExportSize) {
+ Error ("Address size mismatch for symbol `%m%p'", GetSymName (S));
+ }
S->Flags &= ~SF_GLOBAL;
+
+ /* .GLOBAL remembers line infos in case an .IMPORT follows. We have
+ * to remove these here.
+ */
+ ReleaseFullLineInfo (&S->DefLines);
}
- /* If the symbol was already marked as an export, check if this was done
- * specifiying the same address size. If the old spec had no explicit
- * address size, use the new one.
+ /* If the symbol was already marked as an export, but wasn't defined
+ * before, the address sizes in both definitions must match.
*/
- if (S->Flags & SF_EXPORT) {
- if (S->ExportSize == ADDR_SIZE_DEFAULT) {
- S->ExportSize = AddrSize;
- } else if (AddrSize == ADDR_SIZE_DEFAULT) {
- AddrSize = S->ExportSize;
- }
- if (S->ExportSize != ADDR_SIZE_DEFAULT && S->ExportSize != AddrSize) {
- Error ("Address size mismatch for symbol `%s'", GetSymName (S));
+ if ((S->Flags & (SF_EXPORT|SF_DEFINED)) == SF_EXPORT) {
+ if (S->ExportSize != AddrSize) {
+ Error ("Address size mismatch for symbol `%m%p'", GetSymName (S));
}
}
S->ExportSize = AddrSize;
/* No export size given, use the real size of the symbol */
S->ExportSize = S->AddrSize;
} else if (S->AddrSize > S->ExportSize) {
- Warning (1, "Symbol `%s' is %s but exported as %s",
+ /* We're exporting a symbol smaller than it actually is */
+ Warning (1, "Symbol `%m%p' is %s but exported %s",
GetSymName (S), AddrSizeToStr (S->AddrSize),
AddrSizeToStr (S->ExportSize));
}
/* Set the symbol data */
S->Flags |= (SF_EXPORT | SF_REFERENCED | Flags);
+
+ /* Remember line info for this reference */
+ CollAppend (&S->RefLines, GetAsmLineInfo ());
}
* either imported or exported.
*/
{
- /* Don't accept local symbols */
- if (IsLocalNameId (S->Name)) {
- Error ("Illegal use of a local symbol");
- return;
+ if (S->Flags & SF_VAR) {
+ /* Variable symbols cannot be exported or imported */
+ Error ("Var symbol `%m%p' cannot be made global", GetSymName (S));
+ return;
}
- /* If the symbol is already marked as import or export, check the
- * size of the definition, then bail out.
+ /* If the symbol is already marked as import, the address size must match.
+ * Apart from that, ignore the global declaration.
*/
if (S->Flags & SF_IMPORT) {
- if (AddrSize != ADDR_SIZE_DEFAULT && AddrSize != S->AddrSize) {
- Error ("Address size mismatch for symbol `%s'", GetSymName (S));
+ if (AddrSize == ADDR_SIZE_DEFAULT) {
+ /* Use the size of the current segment */
+ AddrSize = GetCurrentSegAddrSize ();
+ }
+ if (AddrSize != S->AddrSize) {
+ Error ("Address size mismatch for symbol `%m%p'", GetSymName (S));
}
return;
}
+
+ /* If the symbol is already an export: If it is not defined, the address
+ * sizes must match.
+ */
if (S->Flags & SF_EXPORT) {
- /* If the old symbol had no explicit address size spec, use the
- * new one.
- */
- if (S->ExportSize == ADDR_SIZE_DEFAULT) {
- S->ExportSize = AddrSize;
+ if ((S->Flags & SF_DEFINED) == 0) {
+ /* Symbol is undefined */
+ if (AddrSize != S->ExportSize) {
+ Error ("Address size mismatch for symbol `%m%p'", GetSymName (S));
+ }
+ } else if (AddrSize != ADDR_SIZE_DEFAULT) {
+ /* Symbol is defined and address size given */
+ if (AddrSize != S->ExportSize) {
+ Error ("Address size mismatch for symbol `%m%p'", GetSymName (S));
+ }
}
+ return;
+ }
+
+ /* If the symbol is already marked as global, the address size must match.
+ * Use the ExportSize here, since it contains the actual address size
+ * passed to this function.
+ */
+ if (S->Flags & SF_GLOBAL) {
if (AddrSize != S->ExportSize) {
- Error ("Address size mismatch for symbol `%s'", GetSymName (S));
+ Error ("Address size mismatch for symbol `%m%p'", GetSymName (S));
}
return;
}
- /* If the symbol is already defined, export it. Otherwise mark it as
- * global.
+ /* If we come here, the symbol was neither declared as export, import or
+ * global before. Check if it is already defined, in which case it will
+ * become an export. If it is not defined, mark it as global and remember
+ * the given address sizes.
*/
if (S->Flags & SF_DEFINED) {
/* The symbol is defined, export it */
/* No export size given, use the real size of the symbol */
S->ExportSize = S->AddrSize;
} else if (S->AddrSize > S->ExportSize) {
- Warning (1, "Symbol `%s' is %s but exported as %s",
+ /* We're exporting a symbol smaller than it actually is */
+ Warning (1, "Symbol `%m%p' is %s but exported %s",
GetSymName (S), AddrSizeToStr (S->AddrSize),
AddrSizeToStr (S->ExportSize));
}
S->Flags |= (SF_EXPORT | Flags);
- S->ExportSize = AddrSize;
} else {
- S->Flags |= (SF_GLOBAL | Flags);
+ /* Since we don't know if the symbol will get exported or imported,
+ * remember two different address sizes: One for an import in AddrSize,
+ * and the other one for an export in ExportSize.
+ */
S->AddrSize = AddrSize;
+ if (S->AddrSize == ADDR_SIZE_DEFAULT) {
+ /* Use the size of the current segment */
+ S->AddrSize = GetCurrentSegAddrSize ();
+ }
+ S->ExportSize = AddrSize;
+ S->Flags |= (SF_GLOBAL | Flags);
+
+ /* Remember the current location as location of definition in case
+ * an .IMPORT follows later.
+ */
+ GetFullLineInfo (&S->DefLines);
}
}
#endif
CHECK (Prio >= CD_PRIO_MIN && Prio <= CD_PRIO_MAX);
- /* Don't accept local symbols */
- if (IsLocalNameId (S->Name)) {
- Error ("Illegal use of a local symbol");
- return;
- }
-
/* Check for errors */
if (S->Flags & SF_IMPORT) {
- /* The symbol is already marked as imported external symbol */
- Error ("Symbol `%s' is already an import", GetSymName (S));
- return;
+ /* The symbol is already marked as imported external symbol */
+ Error ("Symbol `%m%p' is already an import", GetSymName (S));
+ return;
+ }
+ if (S->Flags & SF_VAR) {
+ /* Variable symbols cannot be exported or imported */
+ Error ("Var symbol `%m%p' cannot be exported", GetSymName (S));
+ return;
}
/* If the symbol was already marked as an export or global, check if
*/
if (S->Flags & (SF_EXPORT | SF_GLOBAL)) {
if (S->ExportSize != AddrSize) {
- Error ("Address size mismatch for symbol `%s'", GetSymName (S));
+ Error ("Address size mismatch for symbol `%m%p'", GetSymName (S));
}
S->Flags &= ~SF_GLOBAL;
}
/* Use the real size of the symbol */
S->ExportSize = S->AddrSize;
} else if (S->AddrSize != S->ExportSize) {
- Error ("Address size mismatch for symbol `%s'", GetSymName (S));
+ Error ("Address size mismatch for symbol `%m%p'", GetSymName (S));
}
}
* priority value is the same as the old one.
*/
if (S->ConDesPrio[Type] != CD_PRIO_NONE) {
- if (S->ConDesPrio[Type] != Prio) {
- Error ("Redeclaration mismatch for symbol `%s'", GetSymName (S));
- }
+ if (S->ConDesPrio[Type] != Prio) {
+ Error ("Redeclaration mismatch for symbol `%m%p'", GetSymName (S));
+ }
}
S->ConDesPrio[Type] = Prio;
/* Set the symbol data */
S->Flags |= (SF_EXPORT | SF_REFERENCED);
-}
-
-
-int SymIsDef (const SymEntry* S)
-/* Return true if the given symbol is already defined */
-{
- return (S->Flags & SF_DEFINED) != 0;
+ /* In case we have no line info for the definition, record it now */
+ if (CollCount (&S->DefLines) == 0) {
+ GetFullLineInfo (&S->DefLines);
+ }
}
-int SymIsRef (const SymEntry* S)
-/* Return true if the given symbol has been referenced */
+void SymGuessedAddrSize (SymEntry* Sym, unsigned char AddrSize)
+/* Mark the address size of the given symbol as guessed. The address size
+ * passed as argument is the one NOT used, because the actual address size
+ * wasn't known. Example: Zero page addressing was not used because symbol
+ * is undefined, and absolute addressing was available.
+ */
{
- return (S->Flags & SF_REFERENCED) != 0;
-}
-
-
+ /* We must have a valid address size passed */
+ PRECONDITION (AddrSize != ADDR_SIZE_DEFAULT);
-int SymIsImport (const SymEntry* S)
-/* Return true if the given symbol is marked as import */
-{
- /* Resolve trampoline entries */
- if (S->Flags & SF_TRAMPOLINE) {
- S = S->V.Sym;
+ /* We do not support all address sizes currently */
+ if (AddrSize > sizeof (Sym->GuessedUse) / sizeof (Sym->GuessedUse[0])) {
+ return;
}
- /* Check the import flag */
- return (S->Flags & SF_IMPORT) != 0;
-}
-
-
-
-int SymIsConst (SymEntry* S, long* Val)
-/* Return true if the given symbol has a constant value. If Val is not NULL
- * and the symbol has a constant value, store it's value there.
- */
-{
- /* Resolve trampoline entries */
- if (S->Flags & SF_TRAMPOLINE) {
- S = S->V.Sym;
+ /* We can only remember one such occurance */
+ if (Sym->GuessedUse[AddrSize-1]) {
+ return;
}
- /* Check for constness */
- return (SymHasExpr (S) && IsConstExpr (S->V.Expr, Val));
+ /* Ok, remember the file position */
+ Sym->GuessedUse[AddrSize-1] = xdup (&CurTok.Pos, sizeof (CurTok.Pos));
}
-int SymHasExpr (const SymEntry* S)
-/* Return true if the given symbol has an associated expression */
+void SymExportFromGlobal (SymEntry* S)
+/* Called at the end of assembly. Converts a global symbol that is defined
+ * into an export.
+ */
{
- /* Resolve trampoline entries */
- if (S->Flags & SF_TRAMPOLINE) {
- S = S->V.Sym;
- }
-
- /* Check the expression */
- return ((S->Flags & (SF_DEFINED|SF_IMPORT)) == SF_DEFINED);
+ /* Remove the global flag and make the symbol an export */
+ S->Flags &= ~SF_GLOBAL;
+ S->Flags |= SF_EXPORT;
}
-void SymMarkUser (SymEntry* S)
-/* Set a user mark on the specified symbol */
+void SymImportFromGlobal (SymEntry* S)
+/* Called at the end of assembly. Converts a global symbol that is undefined
+ * into an import.
+ */
{
- /* Resolve trampoline entries */
- if (S->Flags & SF_TRAMPOLINE) {
- S = S->V.Sym;
- }
-
- /* Set the bit */
- S->Flags |= SF_USER;
+ /* Remove the global flag and make it an import */
+ S->Flags &= ~SF_GLOBAL;
+ S->Flags |= SF_IMPORT;
}
-void SymUnmarkUser (SymEntry* S)
-/* Remove a user mark from the specified symbol */
+int SymIsConst (const SymEntry* S, long* Val)
+/* Return true if the given symbol has a constant value. If Val is not NULL
+ * and the symbol has a constant value, store it's value there.
+ */
{
- /* Resolve trampoline entries */
- if (S->Flags & SF_TRAMPOLINE) {
- S = S->V.Sym;
- }
-
- /* Reset the bit */
- S->Flags &= ~SF_USER;
+ /* Check for constness */
+ return (SymHasExpr (S) && IsConstExpr (S->Expr, Val));
}
-int SymHasUserMark (SymEntry* S)
-/* Return the state of the user mark for the specified symbol */
+SymTable* GetSymParentScope (SymEntry* S)
+/* Get the parent scope of the symbol (not the one it is defined in). Return
+ * NULL if the symbol is a cheap local, or defined on global level.
+ */
{
- /* Resolve trampoline entries */
- if (S->Flags & SF_TRAMPOLINE) {
- S = S->V.Sym;
+ if ((S->Flags & SF_LOCAL) != 0) {
+ /* This is a cheap local symbol */
+ return 0;
+ } else if (S->Sym.Tab == 0) {
+ /* Symbol not in a table. This may happen if there have been errors
+ * before. Return NULL in this case to avoid further errors.
+ */
+ return 0;
+ } else {
+ /* This is a global symbol */
+ return S->Sym.Tab->Parent;
}
-
- /* Check the bit */
- return (S->Flags & SF_USER) != 0;
}
struct ExprNode* GetSymExpr (SymEntry* S)
/* Get the expression for a non-const symbol */
{
- /* Resolve trampoline entries */
- if (S->Flags & SF_TRAMPOLINE) {
- S = S->V.Sym;
- }
-
PRECONDITION (S != 0 && SymHasExpr (S));
- return S->V.Expr;
+ return S->Expr;
}
* NULL. Do not call in other contexts!
*/
{
- /* Resolve trampoline entries */
- if (S->Flags & SF_TRAMPOLINE) {
- S = S->V.Sym;
- }
-
- return SymHasExpr (S)? S->V.Expr : 0;
+ return SymHasExpr (S)? S->Expr : 0;
}
-const char* GetSymName (const SymEntry* S)
-/* Return the name of the symbol */
+long GetSymVal (SymEntry* S)
+/* Return the value of a symbol assuming it's constant. FAIL will be called
+ * in case the symbol is undefined or not constant.
+ */
{
- /* Resolve trampoline entries */
- if (S->Flags & SF_TRAMPOLINE) {
- S = S->V.Sym;
- }
- return GetString (S->Name);
+ long Val;
+ CHECK (S != 0 && SymHasExpr (S) && IsConstExpr (GetSymExpr (S), &Val));
+ return Val;
}
-unsigned GetSymAddrSize (const SymEntry* S)
-/* Return the address size of the symbol. Beware: This function will just
- * return the AddrSize member, it will not look at the expression!
- */
+unsigned GetSymImportId (const SymEntry* S)
+/* Return the import id for the given symbol */
{
- if (S->Flags & SF_TRAMPOLINE) {
- S = S->V.Sym;
- }
- return S->AddrSize;
+ PRECONDITION (S != 0 && (S->Flags & SF_IMPORT) && S->ImportId != ~0U);
+ return S->ImportId;
}
-unsigned GetSymIndex (const SymEntry* S)
-/* Return the symbol index for the given symbol */
+unsigned GetSymExportId (const SymEntry* S)
+/* Return the export id for the given symbol */
{
- /* Resolve trampoline entries */
- if (S->Flags & SF_TRAMPOLINE) {
- S = S->V.Sym;
- }
- PRECONDITION (S != 0 && (S->Flags & SF_INDEXED) != 0);
- return S->Index;
+ PRECONDITION (S != 0 && (S->Flags & SF_EXPORT) && S->ExportId != ~0U);
+ return S->ExportId;
}
-const FilePos* GetSymPos (const SymEntry* S)
-/* Return the position of first occurence in the source for the given symbol */
+unsigned GetSymInfoFlags (const SymEntry* S, long* ConstVal)
+/* Return a set of flags used when writing symbol information into a file.
+ * If the SYM_CONST bit is set, ConstVal will contain the constant value
+ * of the symbol. The result does not include the condes count.
+ * See common/symdefs.h for more information.
+ */
{
- /* Resolve trampoline entries */
- if (S->Flags & SF_TRAMPOLINE) {
- S = S->V.Sym;
+ /* Setup info flags */
+ unsigned Flags = 0;
+ Flags |= SymIsConst (S, ConstVal)? SYM_CONST : SYM_EXPR;
+ Flags |= (S->Flags & SF_LABEL)? SYM_LABEL : SYM_EQUATE;
+ Flags |= (S->Flags & SF_LOCAL)? SYM_CHEAP_LOCAL : SYM_STD;
+ if (S->Flags & SF_EXPORT) {
+ Flags |= SYM_EXPORT;
+ }
+ if (S->Flags & SF_IMPORT) {
+ Flags |= SYM_IMPORT;
}
- PRECONDITION (S != 0);
- return &S->Pos;
-}
+ /* Return the result */
+ return Flags;
+}
projects / cc65 / blobdiff