724262fb90
dumped if the run area preceeded the load area, so it was not output into the file for the load area (and not for the run area either). git-svn-id: svn://svn.cc65.org/cc65/trunk@603 b7a2c559-68d2-44c3-8de9-860c34a00d81
281 lines
8.3 KiB
C
281 lines
8.3 KiB
C
/*****************************************************************************/
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/* */
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/* bin.c */
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/* */
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/* Module to handle the raw binary format */
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/* */
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/* */
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/* */
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/* (C) 1999-2000 Ullrich von Bassewitz */
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/* Wacholderweg 14 */
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/* D-70597 Stuttgart */
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/* EMail: uz@musoftware.de */
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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 "xmalloc.h"
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/* ld65 */
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#include "global.h"
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#include "error.h"
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#include "fileio.h"
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#include "segments.h"
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#include "exports.h"
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#include "config.h"
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#include "expr.h"
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#include "bin.h"
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/*****************************************************************************/
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/* Data */
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/*****************************************************************************/
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struct BinDesc {
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unsigned Undef; /* Count of undefined externals */
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FILE* F; /* Output file */
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const char* Filename; /* Name of output file */
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};
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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BinDesc* NewBinDesc (void)
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/* Create a new binary format descriptor */
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{
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/* Allocate memory for a new BinDesc struct */
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BinDesc* D = xmalloc (sizeof (BinDesc));
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/* Initialize the fields */
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D->Undef = 0;
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D->F = 0;
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D->Filename = 0;
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/* Return the created struct */
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return D;
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}
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void FreeBinDesc (BinDesc* D)
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/* Free a binary format descriptor */
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{
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xfree (D);
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}
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static unsigned BinWriteExpr (ExprNode* E, int Signed, unsigned Size,
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unsigned long Offs, void* Data)
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/* Called from SegWrite for an expression. Evaluate the expression, check the
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* range and write the expression value to the file.
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*/
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{
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/* There's a predefined function to handle constant expressions */
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return SegWriteConstExpr (((BinDesc*)Data)->F, E, Signed, Size);
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}
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static void PrintBoolVal (const char* Name, int B)
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/* Print a boolean value for debugging */
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{
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printf (" %s = %s\n", Name, B? "true" : "false");
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}
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static void BinWriteMem (BinDesc* D, Memory* M)
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/* Write the segments of one memory area to a file */
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{
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/* Get the start address of this memory area */
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unsigned long Addr = M->Start;
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/* Get a pointer to the first segment node */
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MemListNode* N = M->SegList;
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while (N) {
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int DoWrite;
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/* Get the segment from the list node */
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SegDesc* S = N->Seg;
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/* Keep the user happy */
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if (Verbose) {
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printf (" Writing `%s'\n", S->Name);
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}
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/* Writes do only occur in the load area and not for BSS segments */
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DoWrite = (S->Flags & SF_BSS) == 0 && /* No BSS segment */
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S->Load == M && /* LOAD segment */
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S->Seg->Dumped == 0; /* Not already written */
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/* Output the DoWrite flag for debugging */
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if (Verbose > 1) {
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PrintBoolVal ("bss", S->Flags & SF_BSS);
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PrintBoolVal ("LoadArea", S->Load == M);
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PrintBoolVal ("Dumped", S->Seg->Dumped);
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PrintBoolVal ("DoWrite", DoWrite);
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}
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/* Check if we would need an alignment */
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if (S->Seg->Align > S->Align) {
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/* Segment itself requires larger alignment than configured
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* in the linker.
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*/
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Warning ("Segment `%s' in module `%s' requires larger alignment",
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S->Name, GetObjFileName (S->Seg->AlignObj));
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}
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/* Handle ALIGN and OFFSET/START */
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if (S->Flags & SF_ALIGN) {
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/* Align the address */
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unsigned long Val, NewAddr;
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Val = (0x01UL << S->Align) - 1;
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NewAddr = (Addr + Val) & ~Val;
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if (DoWrite) {
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WriteMult (D->F, M->FillVal, NewAddr-Addr);
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}
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Addr = NewAddr;
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/* Remember the fill value for the segment */
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S->Seg->FillVal = M->FillVal;
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} else if (S->Flags & (SF_OFFSET | SF_START)) {
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unsigned long NewAddr = S->Addr;
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if (S->Flags & SF_OFFSET) {
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/* It's an offset, not a fixed address, make an address */
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NewAddr += M->Start;
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}
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if (DoWrite) {
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WriteMult (D->F, M->FillVal, NewAddr-Addr);
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}
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Addr = NewAddr;
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}
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/* Now write the segment to disk if it is not a BSS type segment and
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* if the memory area is the load area.
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*/
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if (DoWrite) {
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SegWrite (D->F, S->Seg, BinWriteExpr, D);
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} else if (M->Flags & MF_FILL) {
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WriteMult (D->F, M->FillVal, S->Seg->Size);
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}
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/* If this was the load memory area, mark the segment as dumped */
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if (S->Load == M) {
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S->Seg->Dumped = 1;
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}
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/* Calculate the new address */
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Addr += S->Seg->Size;
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/* Next segment node */
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N = N->Next;
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}
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/* If a fill was requested, fill the remaining space */
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if (M->Flags & MF_FILL) {
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while (M->FillLevel < M->Size) {
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Write8 (D->F, M->FillVal);
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++M->FillLevel;
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}
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}
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}
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static int BinUnresolved (const char* Name, void* D)
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/* Called if an unresolved symbol is encountered */
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{
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/* Unresolved symbols are an error in binary format. Bump the counter
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* and return zero telling the caller that the symbol is indeed
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* unresolved.
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*/
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((BinDesc*) D)->Undef++;
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return 0;
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}
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void BinWriteTarget (BinDesc* D, struct File* F)
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/* Write a binary output file */
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{
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Memory* M;
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/* Place the filename in the control structure */
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D->Filename = F->Name;
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/* Check for unresolved symbols. The function BinUnresolved is called
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* if we get an unresolved symbol.
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*/
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D->Undef = 0; /* Reset the counter */
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CheckExports (BinUnresolved, D);
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if (D->Undef > 0) {
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/* We had unresolved symbols, cannot create output file */
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Error ("%u unresolved external(s) found - cannot create output file", D->Undef);
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}
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/* Open the file */
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D->F = fopen (F->Name, "wb");
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if (D->F == 0) {
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Error ("Cannot open `%s': %s", F->Name, strerror (errno));
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}
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/* Keep the user happy */
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if (Verbose) {
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printf ("Opened `%s'...\n", F->Name);
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}
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/* Dump all memory areas */
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M = F->MemList;
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while (M) {
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if (Verbose) {
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printf (" Dumping `%s'\n", M->Name);
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}
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BinWriteMem (D, M);
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M = M->FNext;
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}
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/* Close the file */
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if (fclose (D->F) != 0) {
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Error ("Cannot write to `%s': %s", F->Name, strerror (errno));
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}
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/* Reset the file and filename */
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D->F = 0;
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D->Filename = 0;
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}
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