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

Add support for Atari XEX file format to LD65

Browse Source
This commit is contained in:
Daniel Serpell
2018-09-24 23:58:06 -03:00
parent c37582bb00
commit 0e947d594f
7 changed files with 435 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

344
src/ld65/xex.c Normal file
View File

@@ -0,0 +1,344 @@
/*****************************************************************************/
/* */
/* xex.c */
/* */
/* Module to handle the Atari XEX binary format */
/* */
/* */
/* */
/* (C) 2018 Daniel Serpell */
/* */
/* */
/* 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 "alignment.h"
#include "print.h"
#include "xmalloc.h"
/* ld65 */
#include "xex.h"
#include "config.h"
#include "exports.h"
#include "expr.h"
#include "error.h"
#include "global.h"
#include "fileio.h"
#include "lineinfo.h"
#include "memarea.h"
#include "segments.h"
#include "spool.h"
/*****************************************************************************/
/* Data */
/*****************************************************************************/
struct XexDesc {
unsigned Undef; /* Count of undefined externals */
FILE* F; /* Output file */
const char* Filename; /* Name of output file */
};
/*****************************************************************************/
/* Code */
/*****************************************************************************/
XexDesc* NewXexDesc (void)
/* Create a new XEX format descriptor */
{
/* Allocate memory for a new XexDesc struct */
XexDesc* D = xmalloc (sizeof (XexDesc));
/* Initialize the fields */
D->Undef = 0;
D->F = 0;
D->Filename = 0;
/* Return the created struct */
return D;
}
void FreeXexDesc (XexDesc* D)
/* Free a XEX format descriptor */
{
xfree (D);
}
static unsigned XexWriteExpr (ExprNode* E, int Signed, unsigned Size,
unsigned long Offs attribute ((unused)),
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 (((XexDesc*)Data)->F, E, Signed, Size);
}
static void PrintBoolVal (const char* Name, int B)
/* Print a boolean value for debugging */
{
Print (stdout, 2, " %s = %s\n", Name, B? "true" : "false");
}
static void PrintNumVal (const char* Name, unsigned long V)
/* Print a numerical value for debugging */
{
Print (stdout, 2, " %s = 0x%lx\n", Name, V);
}
static void XexWriteMem (XexDesc* D, MemoryArea* M)
/* Write the segments of one memory area to a file */
{
unsigned I;
/* Get the start address and size of this memory area */
unsigned long Addr = M->Start;
/* Walk over segments twice: first to get real area size, then to write
* all segments. */
for (I = 0; I < CollCount (&M->SegList); ++I) {
/* Get the segment */
SegDesc* S = CollAtUnchecked (&M->SegList, I);
/* Keep the user happy */
Print (stdout, 1, " Allocating `%s'\n", GetString (S->Name));
/* If this is the run memory area, we must apply run alignment. If
** this is not the run memory area but the load memory area (which
** means that both are different), we must apply load alignment.
** Beware: DoWrite may be true even if this is the run memory area,
** because it may be also the load memory area.
*/
if (S->Run == M) {
/* Handle ALIGN and OFFSET/START */
if (S->Flags & SF_ALIGN) {
/* Align the address */
Addr = AlignAddr (Addr, S->RunAlignment);
} else if (S->Flags & (SF_OFFSET | SF_START)) {
Addr = S->Addr;
if (S->Flags & SF_OFFSET) {
/* It's an offset, not a fixed address, make an address */
Addr += M->Start;
}
}
} else if (S->Load == M) {
/* Handle ALIGN_LOAD */
if (S->Flags & SF_ALIGN_LOAD) {
/* Align the address */
Addr = AlignAddr (Addr, S->LoadAlignment);
}
}
/* Calculate the new address */
Addr += S->Seg->Size;
}
/* Write header */
Write16(D->F, 0xFFFF);
Write16(D->F, M->Start);
Write16(D->F, Addr-1);
/* Redo */
Addr = M->Start;
for (I = 0; I < CollCount (&M->SegList); ++I) {
int DoWrite;
/* Get the segment */
SegDesc* S = CollAtUnchecked (&M->SegList, I);
/* Keep the user happy */
Print (stdout, 1, " Allocating `%s'\n", GetString (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 */
/* If this is the run memory area, we must apply run alignment. If
** this is not the run memory area but the load memory area (which
** means that both are different), we must apply load alignment.
** Beware: DoWrite may be true even if this is the run memory area,
** because it may be also the load memory area.
*/
if (S->Run == M) {
/* Handle ALIGN and OFFSET/START */
if (S->Flags & SF_ALIGN) {
/* Align the address */
unsigned long NewAddr = AlignAddr (Addr, S->RunAlignment);
if (DoWrite || (M->Flags & MF_FILL) != 0) {
WriteMult (D->F, M->FillVal, NewAddr - Addr);
PrintNumVal ("SF_ALIGN", NewAddr - Addr);
}
Addr = NewAddr;
} 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 || (M->Flags & MF_FILL) != 0) {
/* Seek in "overwrite" segments */
if (S->Flags & SF_OVERWRITE) {
fseek (D->F, NewAddr - M->Start, SEEK_SET);
} else {
WriteMult (D->F, M->FillVal, NewAddr-Addr);
PrintNumVal ("SF_OFFSET", NewAddr - Addr);
}
}
Addr = NewAddr;
}
} else if (S->Load == M) {
/* Handle ALIGN_LOAD */
if (S->Flags & SF_ALIGN_LOAD) {
/* Align the address */
unsigned long NewAddr = AlignAddr (Addr, S->LoadAlignment);
if (DoWrite || (M->Flags & MF_FILL) != 0) {
WriteMult (D->F, M->FillVal, NewAddr - Addr);
PrintNumVal ("SF_ALIGN_LOAD", 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) {
unsigned long P = ftell (D->F);
SegWrite (D->Filename, D->F, S->Seg, XexWriteExpr, D);
PrintNumVal ("Wrote", (unsigned long) (ftell (D->F) - P));
} else if (M->Flags & MF_FILL) {
WriteMult (D->F, S->Seg->FillVal, S->Seg->Size);
PrintNumVal ("Filled", (unsigned long) 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;
}
/* If a fill was requested, fill the remaining space */
if ((M->Flags & MF_FILL) != 0 && M->FillLevel < M->Size) {
unsigned long ToFill = M->Size - M->FillLevel;
Print (stdout, 2, " Filling 0x%lx bytes with 0x%02x\n",
ToFill, M->FillVal);
WriteMult (D->F, M->FillVal, ToFill);
M->FillLevel = M->Size;
}
}
static int XexUnresolved (unsigned Name attribute ((unused)), void* D)
/* Called if an unresolved symbol is encountered */
{
/* Unresolved symbols are an error in XEX format. Bump the counter
** and return zero telling the caller that the symbol is indeed
** unresolved.
*/
((XexDesc*) D)->Undef++;
return 0;
}
void XexWriteTarget (XexDesc* D, struct File* F)
/* Write a XEX output file */
{
unsigned I;
/* Place the filename in the control structure */
D->Filename = GetString (F->Name);
/* Check for unresolved symbols. The function XexUnresolved is called
** if we get an unresolved symbol.
*/
D->Undef = 0; /* Reset the counter */
CheckUnresolvedImports (XexUnresolved, 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 (D->Filename, "wb");
if (D->F == 0) {
Error ("Cannot open `%s': %s", D->Filename, strerror (errno));
}
/* Keep the user happy */
Print (stdout, 1, "Opened `%s'...\n", D->Filename);
/* Dump all memory areas */
for (I = 0; I < CollCount (&F->MemoryAreas); ++I) {
/* Get this entry */
MemoryArea* M = CollAtUnchecked (&F->MemoryAreas, I);
Print (stdout, 1, " XEX Dumping `%s'\n", GetString (M->Name));
XexWriteMem (D, M);
}
/* Close the file */
if (fclose (D->F) != 0) {
Error ("Cannot write to `%s': %s", D->Filename, strerror (errno));
}
/* Reset the file and filename */
D->F = 0;
D->Filename = 0;
}