the10thwiz/cc65
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

This commit was generated by cvs2svn to compensate for changes in r2,

Browse Source 
which included commits to RCS files with non-trunk default branches.


git-svn-id: svn://svn.cc65.org/cc65/trunk@3 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
uz
2000-05-28 13:40:48 +00:00
parent 579491e8a4
commit 53dd513176
847 changed files with 91345 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

258
src/ld65/bin.c Normal file
View File

@@ -0,0 +1,258 @@
/*****************************************************************************/
/* */
/* bin.c */
/* */
/* Module to handle the raw binary format */
/* */
/* */
/* */
/* (C) 1999-2000 Ullrich von Bassewitz */
/* Wacholderweg 14 */
/* D-70597 Stuttgart */
/* EMail: uz@musoftware.de */
/* */
/* */
/* 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>
#include "global.h"
#include "error.h"
#include "mem.h"
#include "fileio.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 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 */
if (Verbose) {
printf (" 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 */
/* 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, S->Seg->AlignObj->Name);
}
/* 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) {
SegWrite (D->F, S->Seg, BinWriteExpr, D);
} else if (M->Flags & MF_FILL) {
WriteMult (D->F, M->FillVal, S->Seg->Size);
}
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 */
if (Verbose) {
printf ("Opened `%s'...\n", F->Name);
}
/* Dump all memory areas */
M = F->MemList;
while (M) {
if (Verbose) {
printf (" 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;
}