mirror of https://github.com/cc65/cc65.git
505 lines
16 KiB
C
505 lines
16 KiB
C
/*****************************************************************************/
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/* */
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/* convert.c */
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/* */
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/* Actual conversion routines for the co65 object file converter */
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/* */
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/* */
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/* */
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/* (C) 2003-2011, 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 <stdio.h>
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#include <string.h>
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#include <errno.h>
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/* common */
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#include "debugflag.h"
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#include "print.h"
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#include "version.h"
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#include "xmalloc.h"
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#include "xsprintf.h"
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/* co65 */
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#include "error.h"
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#include "global.h"
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#include "model.h"
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#include "o65.h"
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#include "convert.h"
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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static void PrintO65Stats (const O65Data* D)
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/* Print information about the O65 file if --verbose is given */
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{
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Print (stdout, 1, "Size of text segment: %5lu\n", D->Header.tlen);
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Print (stdout, 1, "Size of data segment: %5lu\n", D->Header.dlen);
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Print (stdout, 1, "Size of bss segment: %5lu\n", D->Header.blen);
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Print (stdout, 1, "Size of zeropage segment: %5lu\n", D->Header.zlen);
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Print (stdout, 1, "Number of imports: %5u\n", CollCount (&D->Imports));
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Print (stdout, 1, "Number of exports: %5u\n", CollCount (&D->Exports));
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Print (stdout, 1, "Number of text segment relocations: %5u\n", CollCount (&D->TextReloc));
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Print (stdout, 1, "Number of data segment relocations: %5u\n", CollCount (&D->DataReloc));
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}
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static void SetupSegLabels (FILE* F)
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/* Setup the segment label names */
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{
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if (BssLabel) {
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fprintf (F, ".export\t\t%s\n", BssLabel);
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} else {
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BssLabel = xstrdup ("BSS");
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}
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if (CodeLabel) {
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fprintf (F, ".export\t\t%s\n", CodeLabel);
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} else {
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CodeLabel = xstrdup ("CODE");
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}
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if (DataLabel) {
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fprintf (F, ".export\t\t%s\n", DataLabel);
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} else {
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DataLabel = xstrdup ("DATA");
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}
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if (ZeropageLabel) {
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fprintf (F, ".export\t\t%s\n", ZeropageLabel);
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} else {
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ZeropageLabel = xstrdup ("ZEROPAGE");
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}
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}
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static const char* LabelPlusOffs (const char* Label, long Offs)
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/* Generate "Label+xxx" in a static buffer and return a pointer to the buffer */
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{
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static char Buf[256];
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xsprintf (Buf, sizeof (Buf), "%s%+ld", Label, Offs);
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return Buf;
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}
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static const char* RelocExpr (const O65Data* D, unsigned char SegID,
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unsigned long Val, const O65Reloc* R)
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/* Generate the segment relative relocation expression. R is only used if the
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** expression contains am import, and may be NULL if this is an error (which
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** is then flagged).
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*/
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{
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const O65Import* Import;
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switch (SegID) {
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case O65_SEGID_UNDEF:
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if (R) {
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if (R->SymIdx >= CollCount (&D->Imports)) {
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Error ("Import index out of range (input file corrupt)");
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}
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Import = CollConstAt (&D->Imports, R->SymIdx);
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return LabelPlusOffs (Import->Name, Val);
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} else {
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Error ("Relocation references an import which is not allowed here");
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return 0;
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}
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break;
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case O65_SEGID_TEXT:
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return LabelPlusOffs (CodeLabel, Val - D->Header.tbase);
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case O65_SEGID_DATA:
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return LabelPlusOffs (DataLabel, Val - D->Header.dbase);
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case O65_SEGID_BSS:
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return LabelPlusOffs (BssLabel, Val - D->Header.bbase);
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case O65_SEGID_ZP:
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return LabelPlusOffs (ZeropageLabel, Val - D->Header.zbase);
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case O65_SEGID_ABS:
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return LabelPlusOffs ("", Val);
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default:
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Internal ("Cannot handle this segment reference in reloc entry");
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}
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/* NOTREACHED */
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return 0;
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}
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static void ConvertImports (FILE* F, const O65Data* D)
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/* Convert the imports */
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{
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unsigned I;
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if (CollCount (&D->Imports) > 0) {
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for (I = 0; I < CollCount (&D->Imports); ++I) {
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/* Get the next import */
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const O65Import* Import = CollConstAt (&D->Imports, I);
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/* Import it by name */
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fprintf (F, ".import\t%s\n", Import->Name);
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}
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fprintf (F, "\n");
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}
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}
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static void ConvertExports (FILE* F, const O65Data* D)
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/* Convert the exports */
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{
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unsigned I;
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if (CollCount (&D->Exports) > 0) {
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for (I = 0; I < CollCount (&D->Exports); ++I) {
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/* Get the next import */
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const O65Export* Export = CollConstAt (&D->Exports, I);
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/* First define it */
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fprintf (F, "%s = %s\n",
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Export->Name,
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RelocExpr (D, Export->SegID, Export->Val, 0));
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/* Then export it by name */
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fprintf (F, ".export\t%s\n", Export->Name);
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}
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fprintf (F, "\n");
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}
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}
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static void ConvertSeg (FILE* F, const O65Data* D, const Collection* Relocs,
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const unsigned char* Data, unsigned long Size)
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/* Convert one segment */
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{
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const O65Reloc* R;
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unsigned RIdx;
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unsigned long Byte;
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/* Get the pointer to the first relocation entry if there are any */
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R = (CollCount (Relocs) > 0)? CollConstAt (Relocs, 0) : 0;
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/* Initialize for the loop */
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RIdx = 0;
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Byte = 0;
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/* Walk over the segment data */
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while (Byte < Size) {
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if (R && R->Offs == Byte) {
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/* We've reached an entry that must be relocated */
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unsigned long Val;
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switch (R->Type) {
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case O65_RTYPE_WORD:
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if (Byte >= Size - 1) {
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Error ("Found WORD relocation, but not enough bytes left");
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} else {
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Val = (Data[Byte+1] << 8) + Data[Byte];
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Byte += 2;
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fprintf (F, "\t.word\t%s\n", RelocExpr (D, R->SegID, Val, R));
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}
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break;
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case O65_RTYPE_HIGH:
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Val = (Data[Byte++] << 8) + R->Val;
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fprintf (F, "\t.byte\t>(%s)\n", RelocExpr (D, R->SegID, Val, R));
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break;
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case O65_RTYPE_LOW:
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Val = Data[Byte++];
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fprintf (F, "\t.byte\t<(%s)\n", RelocExpr (D, R->SegID, Val, R));
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break;
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case O65_RTYPE_SEGADDR:
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if (Byte >= Size - 2) {
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Error ("Found SEGADDR relocation, but not enough bytes left");
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} else {
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Val = (((unsigned long) Data[Byte+2]) << 16) +
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(((unsigned long) Data[Byte+1]) << 8) +
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(((unsigned long) Data[Byte+0]) << 0) +
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R->Val;
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Byte += 3;
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fprintf (F, "\t.faraddr\t%s\n", RelocExpr (D, R->SegID, Val, R));
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}
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break;
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case O65_RTYPE_SEG:
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/* FALLTHROUGH for now */
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default:
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Internal ("Cannot handle relocation type %d at %lu",
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R->Type, Byte);
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}
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/* Get the next relocation entry */
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if (++RIdx < CollCount (Relocs)) {
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R = CollConstAt (Relocs, RIdx);
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} else {
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R = 0;
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}
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} else {
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/* Just a constant value */
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fprintf (F, "\t.byte\t$%02X\n", Data[Byte++]);
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}
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}
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fprintf (F, "\n");
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}
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static void ConvertCodeSeg (FILE* F, const O65Data* D)
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/* Do code segment conversion */
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{
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/* Header */
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fprintf (F,
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";\n; CODE SEGMENT\n;\n"
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".segment\t\"%s\"\n"
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"%s:\n",
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CodeSeg,
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CodeLabel);
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/* Segment data */
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ConvertSeg (F, D, &D->TextReloc, D->Text, D->Header.tlen);
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}
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static void ConvertDataSeg (FILE* F, const O65Data* D)
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/* Do data segment conversion */
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{
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/* Header */
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fprintf (F,
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";\n; DATA SEGMENT\n;\n"
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".segment\t\"%s\"\n"
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"%s:\n",
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DataSeg,
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DataLabel);
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/* Segment data */
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ConvertSeg (F, D, &D->DataReloc, D->Data, D->Header.dlen);
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}
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static void ConvertBssSeg (FILE* F, const O65Data* D)
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/* Do bss segment conversion */
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{
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/* Header */
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fprintf (F,
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";\n; BSS SEGMENT\n;\n"
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".segment\t\"%s\"\n"
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"%s:\n",
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BssSeg,
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BssLabel);
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/* Segment data */
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fprintf (F, "\t.res\t%lu\n", D->Header.blen);
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fprintf (F, "\n");
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}
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static void ConvertZeropageSeg (FILE* F, const O65Data* D)
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/* Do zeropage segment conversion */
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{
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/* Header */
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fprintf (F, ";\n; ZEROPAGE SEGMENT\n;\n");
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if (Model == O65_MODEL_CC65_MODULE) {
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/* o65 files of type cc65-module are linked together with a definition
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** file for the zero page, but the zero page is not allocated in the
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** module itself, but the locations are mapped to the zp locations of
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** the main file.
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*/
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fprintf (F, ".import\t__ZP_START__\t\t; Linker generated symbol\n");
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fprintf (F, "%s = __ZP_START__\n", ZeropageLabel);
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} else {
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/* Header */
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fprintf (F, ".segment\t\"%s\": zeropage\n%s:\n", ZeropageSeg, ZeropageLabel);
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/* Segment data */
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fprintf (F, "\t.res\t%lu\n", D->Header.zlen);
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}
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fprintf (F, "\n");
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}
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void Convert (const O65Data* D)
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/* Convert the o65 file in D using the given output file. */
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{
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FILE* F;
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unsigned I;
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char* Author = 0;
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/* For now, we do only accept o65 files generated by the ld65 linker which
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** have a specific format.
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*/
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if (!Debug && D->Header.mode != O65_MODE_CC65) {
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Error ("Cannot convert o65 files of this type");
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}
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/* Output statistics */
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PrintO65Stats (D);
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/* Walk through the options and print them if verbose mode is enabled.
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** Check for a os=cc65 option and bail out if we didn't find one (for
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** now - later we switch to special handling).
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*/
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for (I = 0; I < CollCount (&D->Options); ++I) {
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/* Get the next option */
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const O65Option* O = CollConstAt (&D->Options, I);
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/* Check the type of the option */
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switch (O->Type) {
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case O65_OPT_FILENAME:
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Print (stdout, 1, "O65 filename option: '%s'\n",
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GetO65OptionText (O));
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break;
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case O65_OPT_OS:
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if (O->Len == 2) {
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Warning ("Operating system option without data found");
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} else {
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Print (stdout, 1, "O65 operating system option: '%s'\n",
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GetO65OSName (O->Data[0]));
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switch (O->Data[0]) {
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case O65_OS_CC65_MODULE:
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if (Model != O65_MODEL_NONE &&
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Model != O65_MODEL_CC65_MODULE) {
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Warning ("Wrong o65 model for input file specified");
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} else {
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Model = O65_MODEL_CC65_MODULE;
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}
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break;
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}
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}
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break;
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case O65_OPT_ASM:
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Print (stdout, 1, "O65 assembler option: '%s'\n",
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GetO65OptionText (O));
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break;
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case O65_OPT_AUTHOR:
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if (Author) {
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xfree (Author);
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}
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Author = xstrdup (GetO65OptionText (O));
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Print (stdout, 1, "O65 author option: '%s'\n", Author);
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break;
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case O65_OPT_TIMESTAMP:
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Print (stdout, 1, "O65 timestamp option: '%s'\n",
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GetO65OptionText (O));
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break;
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default:
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Warning ("Found unknown option, type %d, length %d",
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O->Type, O->Len);
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break;
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}
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}
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/* If we shouldn't generate output, we're done here */
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if (NoOutput) {
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return;
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}
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/* Open the output file */
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F = fopen (OutputName, "w");
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if (F == 0) {
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Error ("Cannot open '%s': %s", OutputName, strerror (errno));
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}
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/* Create a header */
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fprintf (F, ";\n; File generated by co65 v %s using model '%s'\n;\n",
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GetVersionAsString (), GetModelName (Model));
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/* Select the CPU */
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if ((D->Header.mode & O65_CPU_MASK) == O65_CPU_65816) {
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fprintf (F, ".p816\n");
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}
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/* Object file options */
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fprintf (F, ".fopt\t\tcompiler,\"co65 v %s\"\n", GetVersionAsString ());
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if (Author) {
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fprintf (F, ".fopt\t\tauthor, \"%s\"\n", Author);
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xfree (Author);
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Author = 0;
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}
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/* Several other assembler options */
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fprintf (F, ".case\t\ton\n");
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fprintf (F, ".debuginfo\t%s\n", (DebugInfo != 0)? "on" : "off");
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/* Setup/export the segment labels */
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SetupSegLabels (F);
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/* End of header */
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fprintf (F, "\n");
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/* Imported identifiers */
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ConvertImports (F, D);
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/* Exported identifiers */
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ConvertExports (F, D);
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/* Code segment */
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ConvertCodeSeg (F, D);
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/* Data segment */
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ConvertDataSeg (F, D);
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/* BSS segment */
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ConvertBssSeg (F, D);
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/* Zero page segment */
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ConvertZeropageSeg (F, D);
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/* End of data */
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fprintf (F, ".end\n");
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fclose (F);
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}
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