2000-05-28 13:40:48 +00:00
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/*****************************************************************************/
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/* */
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/* dbgsyms.c */
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/* */
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2001-05-29 07:39:46 +00:00
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/* Debug symbol handling for the ld65 linker */
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2000-05-28 13:40:48 +00:00
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/* */
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/* */
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/* */
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2003-05-25 17:57:50 +00:00
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/* (C) 1998-2003 Ullrich von Bassewitz */
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/* R<>merstrasse 52 */
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/* D-70794 Filderstadt */
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/* EMail: uz@cc65.org */
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2000-05-28 13:40:48 +00:00
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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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2003-06-04 12:40:14 +00:00
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/* common */
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2000-08-01 15:17:43 +00:00
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#include "check.h"
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#include "symdefs.h"
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#include "xmalloc.h"
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2000-08-02 13:23:06 +00:00
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2000-08-01 15:17:43 +00:00
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/* ld65 */
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2003-06-04 12:40:14 +00:00
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#include "dbgsyms.h"
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2000-05-28 13:40:48 +00:00
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#include "error.h"
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2003-06-04 12:40:14 +00:00
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#include "expr.h"
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2000-05-28 13:40:48 +00:00
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#include "fileio.h"
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2003-06-04 12:40:14 +00:00
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#include "global.h"
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2000-05-28 13:40:48 +00:00
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#include "objdata.h"
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2003-06-04 12:40:14 +00:00
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#include "spool.h"
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2000-05-28 13:40:48 +00:00
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/*****************************************************************************/
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/* Data */
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/*****************************************************************************/
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/* We will collect all debug symbols in the following array and remove
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* duplicates before outputing them.
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*/
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static DbgSym* DbgSymPool [256];
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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2000-08-02 13:23:06 +00:00
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static DbgSym* NewDbgSym (unsigned char Type, ObjData* O)
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2000-05-28 13:40:48 +00:00
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/* Create a new DbgSym and return it */
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{
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/* Allocate memory */
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2000-08-02 13:23:06 +00:00
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DbgSym* D = xmalloc (sizeof (DbgSym));
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2000-05-28 13:40:48 +00:00
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/* Initialize the fields */
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D->Next = 0;
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D->Flags = 0;
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D->Obj = O;
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D->Expr = 0;
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2000-08-02 13:23:06 +00:00
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D->Name = 0;
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2003-05-25 17:57:50 +00:00
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D->Type = Type;
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2000-05-28 13:40:48 +00:00
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/* Return the new entry */
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return D;
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}
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static DbgSym* GetDbgSym (DbgSym* D, long Val)
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/* Check if we find the same debug symbol in the table. If we find it, return
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* a pointer to the other occurrence, if we didn't find it, return NULL.
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*/
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{
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/* Create the hash. We hash over the symbol value */
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unsigned Hash = ((Val >> 24) & 0xFF) ^
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((Val >> 16) & 0xFF) ^
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((Val >> 8) & 0xFF) ^
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((Val >> 0) & 0xFF);
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/* Check for this symbol */
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2003-06-04 12:40:14 +00:00
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DbgSym* Sym = DbgSymPool[Hash];
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2000-05-28 13:40:48 +00:00
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while (Sym) {
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/* Is this symbol identical? */
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2003-06-04 12:40:14 +00:00
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if (Sym->Name == D->Name && EqualExpr (Sym->Expr, D->Expr)) {
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2000-05-28 13:40:48 +00:00
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/* Found */
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return Sym;
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}
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/* Next symbol */
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Sym = Sym->Next;
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}
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/* This is the first symbol of it's kind */
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return 0;
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}
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static void InsertDbgSym (DbgSym* D, long Val)
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/* Insert the symbol into the hashed symbol pool */
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{
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/* Create the hash. We hash over the symbol value */
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unsigned Hash = ((Val >> 24) & 0xFF) ^
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((Val >> 16) & 0xFF) ^
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((Val >> 8) & 0xFF) ^
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((Val >> 0) & 0xFF);
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/* Insert the symbol */
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D->Next = DbgSymPool [Hash];
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DbgSymPool [Hash] = D;
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}
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DbgSym* ReadDbgSym (FILE* F, ObjData* O)
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/* Read a debug symbol from a file, insert and return it */
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{
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unsigned char Type;
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DbgSym* D;
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/* Read the type */
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Type = Read8 (F);
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2000-08-02 13:23:06 +00:00
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/* Create a new debug symbol */
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D = NewDbgSym (Type, O);
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2000-05-28 13:40:48 +00:00
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2000-08-02 13:23:06 +00:00
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/* Read and assign the name */
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2003-06-04 12:40:14 +00:00
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D->Name = MakeGlobalStringId (O, ReadVar (F));
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2000-05-28 13:40:48 +00:00
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/* Read the value */
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2000-10-30 20:48:11 +00:00
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if (IS_EXP_EXPR (Type)) {
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2000-05-28 13:40:48 +00:00
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D->Expr = ReadExpr (F, O);
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} else {
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D->Expr = LiteralExpr (Read32 (F), O);
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}
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/* Last is the file position where the definition was done */
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ReadFilePos (F, &D->Pos);
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/* Return the new DbgSym */
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return D;
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}
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long GetDbgSymVal (DbgSym* D)
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/* Get the value of this symbol */
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{
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CHECK (D->Expr != 0);
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return GetExprVal (D->Expr);
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}
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void PrintDbgSymLabels (ObjData* O, FILE* F)
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/* Print the debug symbols in a VICE label file */
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{
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unsigned I;
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/* Walk through all debug symbols in this module */
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for (I = 0; I < O->DbgSymCount; ++I) {
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/* Get the next debug symbol */
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DbgSym* D = O->DbgSyms [I];
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/* Get the symbol value */
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long Val = GetDbgSymVal (D);
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/* Lookup this symbol in the table. If it is found in the table, it was
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* already written to the file, so don't emit it twice. If it is not in
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* the table, insert and output it.
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*/
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if (GetDbgSym (D, Val) == 0) {
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/* Emit the VICE label line */
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2003-06-04 12:40:14 +00:00
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fprintf (F, "al %06lX .%s\n", Val, GetString (D->Name));
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2000-05-28 13:40:48 +00:00
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/* Insert the symbol into the table */
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InsertDbgSym (D, Val);
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}
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}
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}
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