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cc65/src/ld65/bin.c
cuz 3889a2bec9 Added dbg file generation
git-svn-id: svn://svn.cc65.org/cc65/trunk@764 b7a2c559-68d2-44c3-8de9-860c34a00d81
2001-05-29 07:39:46 +00:00

279 lines
8.3 KiB
C

/*****************************************************************************/
/* */
/* bin.c */
/* */
/* Module to handle the raw binary format */
/* */
/* */
/* */
/* (C) 1999-2001 Ullrich von Bassewitz */
/* Wacholderweg 14 */
/* D-70597 Stuttgart */
/* 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 <stdio.h>
#include <string.h>
#include <errno.h>
/* common */
#include "print.h"
#include "xmalloc.h"
/* ld65 */
#include "global.h"
#include "error.h"
#include "fileio.h"
#include "lineinfo.h"
#include "segments.h"
#include "exports.h"
#include "config.h"
#include "expr.h"
#include "bin.h"
/*****************************************************************************/
/* Data */
/*****************************************************************************/
struct BinDesc {
unsigned Undef; /* Count of undefined externals */
FILE* F; /* Output file */
const char* Filename; /* Name of output file */
};
/*****************************************************************************/
/* Code */
/*****************************************************************************/
BinDesc* NewBinDesc (void)
/* Create a new binary format descriptor */
{
/* Allocate memory for a new BinDesc struct */
BinDesc* D = xmalloc (sizeof (BinDesc));
/* Initialize the fields */
D->Undef = 0;
D->F = 0;
D->Filename = 0;
/* Return the created struct */
return D;
}
void FreeBinDesc (BinDesc* D)
/* Free a binary format descriptor */
{
xfree (D);
}
static unsigned BinWriteExpr (ExprNode* E, int Signed, unsigned Size,
unsigned long Offs, void* Data)
/* Called from SegWrite for an expression. Evaluate the expression, check the
* range and write the expression value to the file.
*/
{
/* There's a predefined function to handle constant expressions */
return SegWriteConstExpr (((BinDesc*)Data)->F, E, Signed, Size);
}
static void PrintBoolVal (const char* Name, int B)
/* Print a boolean value for debugging */
{
printf (" %s = %s\n", Name, B? "true" : "false");
}
static void BinWriteMem (BinDesc* D, Memory* M)
/* Write the segments of one memory area to a file */
{
/* Get the start address of this memory area */
unsigned long Addr = M->Start;
/* Get a pointer to the first segment node */
MemListNode* N = M->SegList;
while (N) {
int DoWrite;
/* Get the segment from the list node */
SegDesc* S = N->Seg;
/* Keep the user happy */
Print (stdout, 1, " Writing `%s'\n", S->Name);
/* Writes do only occur in the load area and not for BSS segments */
DoWrite = (S->Flags & SF_BSS) == 0 && /* No BSS segment */
S->Load == M && /* LOAD segment */
S->Seg->Dumped == 0; /* Not already written */
/* Output the DoWrite flag for debugging */
if (Verbosity > 1) {
PrintBoolVal ("bss", S->Flags & SF_BSS);
PrintBoolVal ("LoadArea", S->Load == M);
PrintBoolVal ("Dumped", S->Seg->Dumped);
PrintBoolVal ("DoWrite", DoWrite);
}
/* Check if we would need an alignment */
if (S->Seg->Align > S->Align) {
/* Segment itself requires larger alignment than configured
* in the linker.
*/
Warning ("Segment `%s' in module `%s' requires larger alignment",
S->Name, GetObjFileName (S->Seg->AlignObj));
}
/* Handle ALIGN and OFFSET/START */
if (S->Flags & SF_ALIGN) {
/* Align the address */
unsigned long Val, NewAddr;
Val = (0x01UL << S->Align) - 1;
NewAddr = (Addr + Val) & ~Val;
if (DoWrite) {
WriteMult (D->F, M->FillVal, NewAddr-Addr);
}
Addr = NewAddr;
/* Remember the fill value for the segment */
S->Seg->FillVal = M->FillVal;
} else if (S->Flags & (SF_OFFSET | SF_START)) {
unsigned long NewAddr = S->Addr;
if (S->Flags & SF_OFFSET) {
/* It's an offset, not a fixed address, make an address */
NewAddr += M->Start;
}
if (DoWrite) {
WriteMult (D->F, M->FillVal, NewAddr-Addr);
}
Addr = NewAddr;
}
/* Now write the segment to disk if it is not a BSS type segment and
* if the memory area is the load area.
*/
if (DoWrite) {
RelocLineInfo (S->Seg);
SegWrite (D->F, S->Seg, BinWriteExpr, D);
} else if (M->Flags & MF_FILL) {
WriteMult (D->F, M->FillVal, S->Seg->Size);
}
/* If this was the load memory area, mark the segment as dumped */
if (S->Load == M) {
S->Seg->Dumped = 1;
}
/* Calculate the new address */
Addr += S->Seg->Size;
/* Next segment node */
N = N->Next;
}
/* If a fill was requested, fill the remaining space */
if (M->Flags & MF_FILL) {
while (M->FillLevel < M->Size) {
Write8 (D->F, M->FillVal);
++M->FillLevel;
}
}
}
static int BinUnresolved (const char* Name, void* D)
/* Called if an unresolved symbol is encountered */
{
/* Unresolved symbols are an error in binary format. Bump the counter
* and return zero telling the caller that the symbol is indeed
* unresolved.
*/
((BinDesc*) D)->Undef++;
return 0;
}
void BinWriteTarget (BinDesc* D, struct File* F)
/* Write a binary output file */
{
Memory* M;
/* Place the filename in the control structure */
D->Filename = F->Name;
/* Check for unresolved symbols. The function BinUnresolved is called
* if we get an unresolved symbol.
*/
D->Undef = 0; /* Reset the counter */
CheckExports (BinUnresolved, D);
if (D->Undef > 0) {
/* We had unresolved symbols, cannot create output file */
Error ("%u unresolved external(s) found - cannot create output file", D->Undef);
}
/* Open the file */
D->F = fopen (F->Name, "wb");
if (D->F == 0) {
Error ("Cannot open `%s': %s", F->Name, strerror (errno));
}
/* Keep the user happy */
Print (stdout, 1, "Opened `%s'...\n", F->Name);
/* Dump all memory areas */
M = F->MemList;
while (M) {
Print (stdout, 1, " Dumping `%s'\n", M->Name);
BinWriteMem (D, M);
M = M->FNext;
}
/* Close the file */
if (fclose (D->F) != 0) {
Error ("Cannot write to `%s': %s", F->Name, strerror (errno));
}
/* Reset the file and filename */
D->F = 0;
D->Filename = 0;
}