/*****************************************************************************/ /* */ /* dbgsyms.c */ /* */ /* Debug symbol handling for the ld65 linker */ /* */ /* */ /* */ /* (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 */ /* warranty. In no event will the authors be held liable for any damages */ /* arising from the use of this software. */ /* */ /* Permission is granted to anyone to use this software for any purpose, */ /* including commercial applications, and to alter it and redistribute it */ /* freely, subject to the following restrictions: */ /* */ /* 1. The origin of this software must not be misrepresented; you must not */ /* claim that you wrote the original software. If you use this software */ /* in a product, an acknowledgment in the product documentation would be */ /* appreciated but is not required. */ /* 2. Altered source versions must be plainly marked as such, and must not */ /* be misrepresented as being the original software. */ /* 3. This notice may not be removed or altered from any source */ /* distribution. */ /* */ /*****************************************************************************/ #include /* common */ #include "addrsize.h" #include "check.h" #include "symdefs.h" #include "xmalloc.h" /* ld65 */ #include "dbgsyms.h" #include "error.h" #include "exports.h" #include "expr.h" #include "fileio.h" #include "global.h" #include "lineinfo.h" #include "objdata.h" #include "spool.h" /*****************************************************************************/ /* Data */ /*****************************************************************************/ /* Definition of the debug symbol structure */ struct DbgSym { unsigned Id; /* Id of debug symbol */ DbgSym* Next; /* Pool linear list link */ ObjData* Obj; /* Object file that exports the name */ Collection LineInfos; /* Line infos of definition */ ExprNode* Expr; /* Expression (0 if not def'd) */ unsigned Size; /* Symbol size if any */ unsigned OwnerId; /* Id of parent/owner */ unsigned ImportId; /* Id of import if this is one */ unsigned Name; /* Name */ unsigned short Type; /* Type of symbol */ unsigned short AddrSize; /* Address size of symbol */ }; /* We will collect all debug symbols in the following array and remove * duplicates before outputing them. */ static DbgSym* DbgSymPool[256]; /*****************************************************************************/ /* Code */ /*****************************************************************************/ static DbgSym* NewDbgSym (unsigned Id, unsigned Type, unsigned char AddrSize, ObjData* O) /* Create a new DbgSym and return it */ { /* Allocate memory */ DbgSym* D = xmalloc (sizeof (DbgSym)); /* Initialize the fields */ D->Id = Id; D->Next = 0; D->Obj = O; D->LineInfos = EmptyCollection; D->Expr = 0; D->Size = 0; D->OwnerId = ~0U; D->ImportId = ~0U; D->Name = 0; D->Type = Type; D->AddrSize = AddrSize; /* Return the new entry */ return D; } static DbgSym* GetDbgSym (DbgSym* D, long Val) /* Check if we find the same debug symbol in the table. If we find it, return * a pointer to the other occurrence, if we didn't find it, return NULL. */ { /* Create the hash. We hash over the symbol value */ unsigned Hash = ((Val >> 24) & 0xFF) ^ ((Val >> 16) & 0xFF) ^ ((Val >> 8) & 0xFF) ^ ((Val >> 0) & 0xFF); /* Check for this symbol */ DbgSym* Sym = DbgSymPool[Hash]; while (Sym) { /* Is this symbol identical? */ if (Sym->Name == D->Name && EqualExpr (Sym->Expr, D->Expr)) { /* Found */ return Sym; } /* Next symbol */ Sym = Sym->Next; } /* This is the first symbol of it's kind */ return 0; } static void InsertDbgSym (DbgSym* D, long Val) /* Insert the symbol into the hashed symbol pool */ { /* Create the hash. We hash over the symbol value */ unsigned Hash = ((Val >> 24) & 0xFF) ^ ((Val >> 16) & 0xFF) ^ ((Val >> 8) & 0xFF) ^ ((Val >> 0) & 0xFF); /* Insert the symbol */ D->Next = DbgSymPool [Hash]; DbgSymPool [Hash] = D; } DbgSym* ReadDbgSym (FILE* F, ObjData* O, unsigned Id) /* Read a debug symbol from a file, insert and return it */ { /* Read the type and address size */ unsigned Type = ReadVar (F); unsigned char AddrSize = Read8 (F); /* Create a new debug symbol */ DbgSym* D = NewDbgSym (Id, Type, AddrSize, O); /* Read the id of the owner scope/symbol */ D->OwnerId = ReadVar (F); /* Read and assign the name */ D->Name = MakeGlobalStringId (O, ReadVar (F)); /* Read the value */ if (SYM_IS_EXPR (D->Type)) { D->Expr = ReadExpr (F, O); } else { D->Expr = LiteralExpr (Read32 (F), O); } /* Read the size */ if (SYM_HAS_SIZE (D->Type)) { D->Size = ReadVar (F); } /* If this is an import, the file contains its id */ if (SYM_IS_IMPORT (D->Type)) { D->ImportId = ReadVar (F); } /* If its an exports, there's also the export id, but we don't remember * it but use it to let the export point back to us. */ if (SYM_IS_EXPORT (D->Type)) { /* Get the export from the export id, then set the our id */ GetObjExport (O, ReadVar (F))->DbgSymId = Id; } /* Last is the list of line infos for this symbol */ ReadLineInfoList (F, O, &D->LineInfos); /* Return the new DbgSym */ return D; } void ClearDbgSymTable (void) /* Clear the debug symbol table */ { unsigned I; for (I = 0; I < sizeof (DbgSymPool) / sizeof (DbgSymPool[0]); ++I) { DbgSym* Sym = DbgSymPool[I]; DbgSymPool[I] = 0; while (Sym) { DbgSym* NextSym = Sym->Next; Sym->Next = 0; Sym = NextSym; } } } static long GetDbgSymVal (const DbgSym* D) /* Get the value of this symbol */ { CHECK (D->Expr != 0); return GetExprVal (D->Expr); } void PrintDbgSyms (FILE* F) /* Print the debug symbols in a debug file */ { unsigned I, J; for (I = 0; I < CollCount (&ObjDataList); ++I) { /* Get the object file */ ObjData* O = CollAtUnchecked (&ObjDataList, I); /* Walk through all debug symbols in this module */ for (J = 0; J < CollCount (&O->DbgSyms); ++J) { /* Get the next debug symbol */ const DbgSym* S = CollConstAt (&O->DbgSyms, J); /* Emit the base data for the entry */ fprintf (F, "sym\tid=%u,name=\"%s\",addrsize=%s,type=%s", O->SymBaseId + J, GetString (S->Name), AddrSizeToStr (S->AddrSize), SYM_IS_LABEL (S->Type)? "lab" : "equ"); /* If this is not an import, output its value and - if we have * it - the segment. */ if (!SYM_IS_IMPORT (S->Type)) { SegExprDesc D; /* Get the symbol value */ long Val = GetDbgSymVal (S); /* Output it */ fprintf (F, ",val=0x%lX", Val); /* Check for a segmented expression and add the segment id to * the debug info if we have one. */ GetSegExprVal (S->Expr, &D); if (!D.TooComplex && D.Seg != 0) { fprintf (F, ",seg=%u", D.Seg->Id); } /* Output the type */ fprintf (F, ",type=%s", SYM_IS_LABEL (S->Type)? "lab" : "equ"); } else { /* Output the type */ fputs (",type=imp", F); } /* Emit the size only if we know it */ if (S->Size != 0) { fprintf (F, ",size=%u", S->Size); } /* For cheap local symbols, add the owner symbol, for others, * add the owner scope. */ if (SYM_IS_STD (S->Type)) { fprintf (F, ",scope=%u", O->ScopeBaseId + S->OwnerId); } else { fprintf (F, ",parent=%u", O->SymBaseId + S->OwnerId); } /* If this is an import, output the id of the matching export */ if (SYM_IS_IMPORT (S->Type)) { /* Get the import */ const Import* Imp = GetObjImport (O, S->ImportId); /* Get the export from the import */ const Export* Exp = Imp->Exp; /* If this is not a linker generated symbol, output the debug * symbol id for the export */ if (Exp->Obj) { fprintf (F, ",exp=%u", Exp->Obj->SymBaseId + Exp->DbgSymId); } } /* Terminate the output line */ fputc ('\n', F); } } } void PrintDbgSymLabels (ObjData* O, FILE* F) /* Print the debug symbols in a VICE label file */ { unsigned I; /* Walk through all debug symbols in this module */ for (I = 0; I < CollCount (&O->DbgSyms); ++I) { long Val; /* Get the next debug symbol */ DbgSym* D = CollAt (&O->DbgSyms, I); /* Emit this symbol only if it is a label (ignore equates and imports) */ if (SYM_IS_EQUATE (D->Type) || SYM_IS_IMPORT (D->Type)) { continue; } /* Get the symbol value */ Val = GetDbgSymVal (D); /* Lookup this symbol in the table. If it is found in the table, it was * already written to the file, so don't emit it twice. If it is not in * the table, insert and output it. */ if (GetDbgSym (D, Val) == 0) { /* Emit the VICE label line */ fprintf (F, "al %06lX .%s\n", Val, GetString (D->Name)); /* Insert the symbol into the table */ InsertDbgSym (D, Val); } } }