mirror of
https://github.com/cc65/cc65.git
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8e35a82c91
Closes #409
266 lines
8.2 KiB
C
266 lines
8.2 KiB
C
/*****************************************************************************/
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/* */
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/* symentry.c */
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/* */
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/* Symbol table entries for the cc65 C compiler */
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/* */
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/* */
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/* */
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/* (C) 2000-2013, Ullrich von Bassewitz */
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/* Roemerstrasse 52 */
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/* D-70794 Filderstadt */
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/* EMail: uz@cc65.org */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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#include <string.h>
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/* common */
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#include "xmalloc.h"
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/* cc65 */
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#include "anonname.h"
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#include "declare.h"
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#include "error.h"
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#include "symentry.h"
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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SymEntry* NewSymEntry (const char* Name, unsigned Flags)
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/* Create a new symbol table with the given name */
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{
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/* Get the length of the name */
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unsigned Len = strlen (Name);
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/* Allocate memory for the symbol entry */
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SymEntry* E = xmalloc (sizeof (SymEntry) + Len);
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/* Initialize the entry */
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E->NextHash = 0;
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E->PrevSym = 0;
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E->NextSym = 0;
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E->Link = 0;
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E->Owner = 0;
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E->Flags = Flags;
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E->Type = 0;
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E->Attr = 0;
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E->AsmName = 0;
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E->V.BssName = 0;
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memcpy (E->Name, Name, Len+1);
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/* Return the new entry */
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return E;
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}
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void FreeSymEntry (SymEntry* E)
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/* Free a symbol entry */
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{
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TypeFree (E->Type);
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xfree (E->AsmName);
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xfree (E);
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}
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void DumpSymEntry (FILE* F, const SymEntry* E)
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/* Dump the given symbol table entry to the file in readable form */
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{
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static const struct {
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const char* Name;
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unsigned Val;
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} Flags [] = {
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/* Beware: Order is important! */
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{ "SC_TYPEDEF", SC_TYPEDEF },
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{ "SC_BITFIELD", SC_BITFIELD },
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{ "SC_STRUCTFIELD", SC_STRUCTFIELD },
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{ "SC_UNION", SC_UNION },
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{ "SC_STRUCT", SC_STRUCT },
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{ "SC_AUTO", SC_AUTO },
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{ "SC_REGISTER", SC_REGISTER },
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{ "SC_STATIC", SC_STATIC },
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{ "SC_EXTERN", SC_EXTERN },
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{ "SC_ENUM", SC_ENUM },
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{ "SC_CONST", SC_CONST },
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{ "SC_LABEL", SC_LABEL },
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{ "SC_PARAM", SC_PARAM },
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{ "SC_FUNC", SC_FUNC },
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{ "SC_STORAGE", SC_STORAGE },
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{ "SC_DEF", SC_DEF },
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{ "SC_REF", SC_REF },
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{ "SC_ZEROPAGE", SC_ZEROPAGE },
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};
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unsigned I;
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unsigned SymFlags;
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/* Print the name */
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fprintf (F, "%s:\n", E->Name);
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/* Print the assembler name if we have one */
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if (E->AsmName) {
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fprintf (F, " AsmName: %s\n", E->AsmName);
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}
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/* Print the flags */
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SymFlags = E->Flags;
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fprintf (F, " Flags:");
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for (I = 0; I < sizeof (Flags) / sizeof (Flags[0]) && SymFlags != 0; ++I) {
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if ((SymFlags & Flags[I].Val) == Flags[I].Val) {
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SymFlags &= ~Flags[I].Val;
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fprintf (F, " %s", Flags[I].Name);
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}
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}
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if (SymFlags != 0) {
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fprintf (F, " 0x%05X", SymFlags);
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}
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fprintf (F, "\n");
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/* Print the type */
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fprintf (F, " Type: ");
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if (E->Type) {
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PrintType (F, E->Type);
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} else {
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fprintf (F, "(none)");
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}
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fprintf (F, "\n");
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}
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int SymIsOutputFunc (const SymEntry* Sym)
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/* Return true if this is a function that must be output */
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{
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/* Symbol must be a function which is defined and either extern or
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** static and referenced.
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*/
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return IsTypeFunc (Sym->Type) &&
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SymIsDef (Sym) &&
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(Sym->Flags & (SC_REF | SC_EXTERN));
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}
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const DeclAttr* SymGetAttr (const SymEntry* Sym, DeclAttrType AttrType)
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/* Return an attribute for this symbol or NULL if the attribute does not exist */
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{
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/* Beware: We may not even have a collection */
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if (Sym->Attr) {
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unsigned I;
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for (I = 0; I < CollCount (Sym->Attr); ++I) {
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/* Get the next attribute */
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const DeclAttr* A = CollConstAt (Sym->Attr, I);
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/* If this is the one we're searching for, return it */
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if (A->AttrType == AttrType) {
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return A;
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}
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}
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}
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/* Not found */
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return 0;
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}
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void SymUseAttr (SymEntry* Sym, struct Declaration* D)
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/* Use the attributes from the declaration for this symbol */
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{
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/* We cannot specify attributes twice */
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if ((Sym->Flags & SC_HAVEATTR) != 0) {
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if (D->Attributes != 0) {
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Error ("Attributes must be specified in the first declaration");
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}
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return;
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}
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/* Move the attributes */
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Sym->Attr = D->Attributes;
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D->Attributes = 0;
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Sym->Flags |= SC_HAVEATTR;
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}
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void SymSetAsmName (SymEntry* Sym)
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/* Set the assembler name for an external symbol from the name of the symbol */
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{
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unsigned Len;
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/* Cannot be used to change the name */
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PRECONDITION (Sym->AsmName == 0);
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/* The assembler name starts with an underline */
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Len = strlen (Sym->Name);
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Sym->AsmName = xmalloc (Len + 2);
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Sym->AsmName[0] = '_';
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memcpy (Sym->AsmName+1, Sym->Name, Len+1);
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}
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void CvtRegVarToAuto (SymEntry* Sym)
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/* Convert a register variable to an auto variable */
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{
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/* Change the storage class */
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Sym->Flags = (Sym->Flags & ~(SC_REGISTER | SC_STATIC | SC_EXTERN)) | SC_AUTO;
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/* Transfer the stack offset from register save area to actual offset */
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Sym->V.Offs = Sym->V.R.SaveOffs;
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}
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void ChangeSymType (SymEntry* Entry, Type* T)
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/* Change the type of the given symbol */
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{
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TypeFree (Entry->Type);
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Entry->Type = TypeDup (T);
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}
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void ChangeAsmName (SymEntry* Entry, const char* NewAsmName)
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/* Change the assembler name of the symbol */
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{
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xfree (Entry->AsmName);
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Entry->AsmName = xstrdup (NewAsmName);
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}
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int HasAnonName (const SymEntry* Entry)
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/* Return true if the symbol entry has an anonymous name */
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{
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return IsAnonName (Entry->Name);
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}
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