/* exp_ndll.c: Routines to export to a Nostub DLL file Copyright (C) 2002-2003 Sebastian Reichelt This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "exp_ndll.h" #ifdef NOSTUB_DLL_SUPPORT #include "../manip.h" #include "../special.h" // Get the file size needed to export the program into a Nostub DLL file. // Returns 0 on failure. // Call this function once to receive necessary error messages. SIZE GetNostubDLLFileSize (const PROGRAM *Program) { // Get a pointer to the main section. SECTION *MainSection = Program->MainSection; if (!MainSection) { Error (NULL, "No main section."); return 0; } { // Start with two size bytes and the size of the section. // Add 2 for the two null bytes at the beginning of the reloc table. SIZE Size = 2 + MainSection->Size + 2; if (!(IsEmpty (MainSection->Relocs))) { RELOC *Reloc; // Add the size needed for the relocs. for_each (Reloc, MainSection->Relocs) { // If this can be resolved to a calculator-dependent value, ignore the // reloc for now. if (IsPlainCalcBuiltin (Reloc)) continue; // We can only emit 4-byte absolute relocs. if (Reloc->Relative || (Reloc->Size != 4)) { Error (GetFileName (MainSection, Reloc->Location), "Cannot emit %ld byte %s reloc to `%s'.", (long) Reloc->Size, Reloc->Relative ? "relative" : "absolute", Reloc->Target.SymbolName); Size = 0; } if (Size) // A reloc takes 4 bytes: 2 bytes for the location and 2 bytes for the target offset. Size += 4; } } // Add 1 for the embedded tag byte. Size ++; return Size; } } // Export the internal data structures into a Nostub DLL file. BOOLEAN ExportNostubDLLFile (const PROGRAM *Program, EXP_FILE *File, SIZE FileSize, ProgramCalcs DestCalc ATTRIBUTE_UNUSED) { // A simple macro to make the code more readable. #define FailWithError(Err...) ({ Error (Err); return FALSE; }) const char *SectionFileName = NULL; OFFSET DataStart = 0; COUNT EmittedRelocCount = 0; // Get a pointer to the main section. SECTION *MainSection = Program->MainSection; if (!MainSection) FailWithError (NULL, "No main section."); // Get the section file name for error messages. SectionFileName = MainSection->FileName; if (!(MainSection->Data)) FailWithError (SectionFileName, "No section contents."); // Write out the embedded size. ExportWriteTI2 (File, FileSize - 2); // Write out the section contents first. DataStart = ExportTell (File); ExportWrite (File, MainSection->Data, MainSection->Size, 1); // Write out two zero bytes as a separator. ExportWriteTI2 (File, 0); if (!(IsEmpty (MainSection->Relocs))) { RELOC *Reloc; // Write out the relocation table. for (Reloc = GetLast (MainSection->Relocs); Reloc; Reloc = GetPrev (Reloc)) { // Get the current file name for error messages. const char *CurFileName = GetFileName (MainSection, Reloc->Location); // If this can be resolved to a calculator-dependent value, write the // value into the section data. if (EmitCalcBuiltinValue (Reloc, DestCalc, File, FileSize, DataStart)) continue; // We can only emit relocs with a target symbol in the same section. if (!(Reloc->Target.Symbol)) FailWithError (CurFileName, "Unresolved reference to `%s'.", Reloc->Target.SymbolName); if (Reloc->Target.Symbol->Parent != MainSection) FailWithError (CurFileName, "Cannot emit reloc to `%s' in different section.", Reloc->Target.SymbolName); // We can only emit 4-byte absolute relocs. if (Reloc->Relative || (Reloc->Size != 4)) FailWithError (CurFileName, "Cannot emit %ld byte %s reloc to `%s'.", (long) Reloc->Size, Reloc->Relative ? "relative" : "absolute", Reloc->Target.SymbolName); if (((I2) Reloc->Location) != Reloc->Location) FailWithError (CurFileName, "Cannot emit reloc outside of limited program range to `%s'.", Reloc->Target.SymbolName); { OFFSET TargetLocation = GetLocationOffset (MainSection, &(Reloc->Target)) + Reloc->FixedOffset; if (((I2) TargetLocation) != TargetLocation) FailWithError (CurFileName, "Cannot emit reloc to `%s' (Offset %ld; Location 0x%lX) outside of limited program range.", Reloc->Target.SymbolName, (long) (Reloc->Target.Offset + Reloc->FixedOffset), (long) (TargetLocation)); // Everything seems to be correct. ExportWriteTI2 (File, TargetLocation); ExportWriteTI2 (File, Reloc->Location); // Increase the statistics. EmittedRelocCount++; } } } // Write out the embedded tag byte (ASM_TAG). ExportWriteTI1 (File, 0xF3); if ((!(IsEmpty (MainSection->ROMCalls))) && (!(MainSection->ROMCalls.Handled))) FailWithError (SectionFileName, "ROM calls are not supported in this mode."); if ((!(IsEmpty (MainSection->RAMCalls))) && (!(MainSection->RAMCalls.Handled))) FailWithError (SectionFileName, "RAM calls are not supported in this mode."); if ((!(IsEmpty (MainSection->LibCalls))) && (!(MainSection->LibCalls.Handled))) FailWithError (SectionFileName, "Library calls are not supported in this mode."); if (Program->OptimizeInfo->NativeRelocCount < EmittedRelocCount) Program->OptimizeInfo->NativeRelocCount = EmittedRelocCount; return TRUE; #undef FailWithError } #endif /* NOSTUB_DLL_SUPPORT */