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- /* exp_os.c: Routines to export to a Flash OS
- Copyright (C) 2004 Billy Charvet
- Copyright (C) 2004-2008 Kevin Kofler
- Copyright (C) 2004 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_os.h"
- #ifdef FLASH_OS_SUPPORT
- #include "../manip.h"
- #include "../special.h"
- // Get the file size needed to export the program into a Flash OS.
- // Returns 0 on failure.
- // Call this function once to receive necessary error messages.
- SIZE GetFlashOSFileSize (const PROGRAM *Program)
- {
- // Get a pointer to the main section.
- SECTION *MainSection = Program->MainSection;
-
- if (!MainSection)
- {
- Error (NULL, "No main section.");
- return 0;
- }
-
- {
- SIZE Size = MainSection->Size;
- if (Size & 0x1)
- Size++;
- return Size;
- }
- }
- // Export the internal data structures into a Flash OS.
- BOOLEAN ExportFlashOSFile (const PROGRAM *Program, EXP_FILE *File, SIZE FileSize, ProgramCalcs DestCalc)
- {
- // A simple macro to make the code more readable.
- #define FailWithError(Err...) ({ Error (Err); return FALSE; })
-
- // Get a pointer to the main section.
- const char *SectionFileName = NULL;
- OFFSET DataStart, DataEnd;
- I4 ROMBase;
- const I1 ZeroByte = 0;
-
- SECTION *MainSection = Program->MainSection;
-
- switch (DestCalc)
- {
- case CALC_TI89:
- case CALC_V200:
- ROMBase = 0x200000;
- break;
-
- case CALC_TI92PLUS:
- ROMBase = 0x400000;
- break;
-
- case CALC_TI89 | CALC_FLAG_TITANIUM:
- ROMBase = 0x800000;
- break;
-
- case CALC_TI92:
- FailWithError (NULL, "Flash upgrades are not available for the TI-92.");
-
- default:
- FailWithError (NULL, "Unknown calculator model.");
- }
-
- if (!MainSection)
- FailWithError (NULL, "No main section.");
-
- SectionFileName = MainSection->FileName;
-
- if (!(MainSection->StartupNumber || (Program->Type == PT_NOSTUB)))
- FailWithError (SectionFileName, "No startup section(s) defined.");
-
- if (!(MainSection->Data))
- FailWithError (SectionFileName, "No section contents.");
-
- // Write out the section contents first.
- DataStart = ExportTell (File);
- ExportWrite (File, MainSection->Data, MainSection->Size, 1);
- // Pad the main section to an even length.
- if (MainSection->Size & 0x1)
- ExportWrite (File, &ZeroByte, 1, 1);
- DataEnd = ExportTell (File);
-
- if (!(IsEmpty (MainSection->Relocs)))
- {
- RELOC *Reloc;
-
- // Write out the relocation entries.
- 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);
-
- {
- OFFSET TargetLocation = GetLocationOffset (MainSection, &(Reloc->Target)) + Reloc->FixedOffset;
-
- TargetLocation += (OFFSET) (ROMBase + 0x12000);
- ExportSeek (File, DataStart + Reloc->Location);
- ExportWriteTI (File, TargetLocation, Reloc->Size, TRUE, TRUE);
-
- // Do not increase the statistics, since that would give a false
- // impression that the relocation entries actually take up some
- // space in the OS.
- }
- }
- ExportSeek (File, DataEnd);
- }
-
- if ((!(IsEmpty (MainSection->ROMCalls))) && (!(MainSection->ROMCalls.Handled)))
- FailWithError (SectionFileName, "ROM calls are not supported in Flash OSs.");
-
- if ((!(IsEmpty (MainSection->RAMCalls))) && (!(MainSection->RAMCalls.Handled)))
- FailWithError (SectionFileName, "RAM calls are not supported in Flash OSs.");
-
- if ((!(IsEmpty (MainSection->LibCalls))) && (!(MainSection->LibCalls.Handled)))
- FailWithError (SectionFileName, "Library calls are not supported in Flash OSs.");
-
- return TRUE;
-
- #undef FailWithError
- }
- #endif /* FLASH_OS_SUPPORT */
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