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cc65/src/ld65/config.c

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/*****************************************************************************/
/* */
/* config.c */
/* */
/* Target configuration file for the ld65 linker */
/* */
/* */
/* */
/* (c) 1998-2013, Ullrich von Bassewitz */
/* Roemerstrasse 52 */
/* D-70794 Filderstadt */
/* EMail: uz@cc65.org */
/* */
/* With contributions from: */
/* */
/* - "David M. Lloyd" <david.lloyd@redhat.com> */
/* */
/* */
/* 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 <stdlib.h>
#include <string.h>
#include <errno.h>
/* common */
#include "addrsize.h"
#include "bitops.h"
#include "check.h"
#include "print.h"
#include "segdefs.h"
#include "target.h"
#include "xmalloc.h"
#include "xsprintf.h"
/* ld65 */
#include "alignment.h"
#include "bin.h"
#include "binfmt.h"
#include "cfgexpr.h"
#include "condes.h"
#include "config.h"
#include "error.h"
#include "exports.h"
#include "expr.h"
#include "global.h"
#include "memarea.h"
#include "o65.h"
#include "objdata.h"
#include "scanner.h"
#include "spool.h"
/*****************************************************************************/
/* Data */
/*****************************************************************************/
/* Remember which sections we had encountered */
static enum {
SE_NONE = 0x0000,
SE_MEMORY = 0x0001,
SE_SEGMENTS = 0x0002,
SE_FEATURES = 0x0004,
SE_FILES = 0x0008,
SE_FORMATS = 0x0010,
SE_SYMBOLS = 0x0020
} SectionsEncountered = SE_NONE;
/* File list */
static Collection FileList = STATIC_COLLECTION_INITIALIZER;
/* Memory list */
static Collection MemoryAreas = STATIC_COLLECTION_INITIALIZER;
/* Memory attributes */
#define MA_START 0x0001
#define MA_SIZE 0x0002
#define MA_TYPE 0x0004
#define MA_FILE 0x0008
#define MA_DEFINE 0x0010
#define MA_FILL 0x0020
#define MA_FILLVAL 0x0040
#define MA_BANK 0x0080
/* Segment list */
static Collection SegDescList = STATIC_COLLECTION_INITIALIZER;
/* Segment attributes */
#define SA_TYPE 0x0001
#define SA_LOAD 0x0002
#define SA_RUN 0x0004
#define SA_ALIGN 0x0008
#define SA_ALIGN_LOAD 0x0010
#define SA_DEFINE 0x0020
#define SA_OFFSET 0x0040
#define SA_START 0x0080
#define SA_OPTIONAL 0x0100
#define SA_FILLVAL 0x0200
/* Symbol types used in the CfgSymbol structure */
typedef enum {
CfgSymExport, /* Not really used in struct CfgSymbol */
CfgSymImport, /* Dito */
CfgSymWeak, /* Like export but weak */
CfgSymO65Export, /* An o65 export */
CfgSymO65Import, /* An o65 import */
} CfgSymType;
/* Symbol structure. It is used for o65 imports and exports, but also for
** symbols from the SYMBOLS sections (symbols defined in the config file or
** forced imports).
*/
typedef struct CfgSymbol CfgSymbol;
struct CfgSymbol {
CfgSymType Type; /* Type of symbol */
LineInfo* LI; /* Config file position */
unsigned Name; /* Symbol name */
ExprNode* Value; /* Symbol value if any */
unsigned AddrSize; /* Address size of symbol */
};
/* Collections with symbols */
static Collection CfgSymbols = STATIC_COLLECTION_INITIALIZER;
/* Descriptor holding information about the binary formats */
static BinDesc* BinFmtDesc = 0;
static O65Desc* O65FmtDesc = 0;
/*****************************************************************************/
/* Forwards */
/*****************************************************************************/
static File* NewFile (unsigned Name);
/* Create a new file descriptor and insert it into the list */
/*****************************************************************************/
/* List management */
/*****************************************************************************/
static File* FindFile (unsigned Name)
/* Find a file with a given name. */
{
unsigned I;
for (I = 0; I < CollCount (&FileList); ++I) {
File* F = CollAtUnchecked (&FileList, I);
if (F->Name == Name) {
return F;
}
}
return 0;
}
static File* GetFile (unsigned Name)
/* Get a file entry with the given name. Create a new one if needed. */
{
File* F = FindFile (Name);
if (F == 0) {
/* Create a new one */
F = NewFile (Name);
}
return F;
}
static void FileInsert (File* F, MemoryArea* M)
/* Insert the memory area into the files list */
{
M->F = F;
CollAppend (&F->MemoryAreas, M);
}
static MemoryArea* CfgFindMemory (unsigned Name)
/* Find the memory are with the given name. Return NULL if not found */
{
unsigned I;
for (I = 0; I < CollCount (&MemoryAreas); ++I) {
MemoryArea* M = CollAtUnchecked (&MemoryAreas, I);
if (M->Name == Name) {
return M;
}
}
return 0;
}
static MemoryArea* CfgGetMemory (unsigned Name)
/* Find the memory are with the given name. Print an error on an invalid name */
{
MemoryArea* M = CfgFindMemory (Name);
if (M == 0) {
CfgError (&CfgErrorPos, "Invalid memory area `%s'", GetString (Name));
}
return M;
}
static SegDesc* CfgFindSegDesc (unsigned Name)
/* Find the segment descriptor with the given name, return NULL if not found. */
{
unsigned I;
for (I = 0; I < CollCount (&SegDescList); ++I) {
SegDesc* S = CollAtUnchecked (&SegDescList, I);
if (S->Name == Name) {
/* Found */
return S;
}
}
/* Not found */
return 0;
}
static void MemoryInsert (MemoryArea* M, SegDesc* S)
/* Insert the segment descriptor into the memory area list */
{
/* Insert the segment into the segment list of the memory area */
CollAppend (&M->SegList, S);
}
/*****************************************************************************/
/* Constructors/Destructors */
/*****************************************************************************/
static CfgSymbol* NewCfgSymbol (CfgSymType Type, unsigned Name)
/* Create a new CfgSymbol structure with the given type and name. The
** current config file position is recorded in the returned struct. The
** created struct is inserted into the CfgSymbols collection and returned.
*/
{
/* Allocate memory */
CfgSymbol* Sym = xmalloc (sizeof (CfgSymbol));
/* Initialize the fields */
Sym->Type = Type;
Sym->LI = GenLineInfo (&CfgErrorPos);
Sym->Name = Name;
Sym->Value = 0;
Sym->AddrSize = ADDR_SIZE_INVALID;
/* Insert the symbol into the collection */
CollAppend (&CfgSymbols, Sym);
/* Return the initialized struct */
return Sym;
}
static File* NewFile (unsigned Name)
/* Create a new file descriptor and insert it into the list */
{
/* Allocate memory */
File* F = xmalloc (sizeof (File));
/* Initialize the fields */
F->Name = Name;
F->Flags = 0;
F->Format = BINFMT_DEFAULT;
F->Size = 0;
InitCollection (&F->MemoryAreas);
/* Insert the struct into the list */
CollAppend (&FileList, F);
/* ...and return it */
return F;
}
static MemoryArea* CreateMemoryArea (const FilePos* Pos, unsigned Name)
/* Create a new memory area and insert it into the list */
{
/* Check for duplicate names */
MemoryArea* M = CfgFindMemory (Name);
if (M) {
CfgError (&CfgErrorPos,
"Memory area `%s' defined twice",
GetString (Name));
}
/* Create a new memory area */
M = NewMemoryArea (Pos, Name);
/* Insert the struct into the list ... */
CollAppend (&MemoryAreas, M);
/* ...and return it */
return M;
}
static SegDesc* NewSegDesc (unsigned Name)
/* Create a segment descriptor and insert it into the list */
{
/* Check for duplicate names */
SegDesc* S = CfgFindSegDesc (Name);
if (S) {
CfgError (&CfgErrorPos, "Segment `%s' defined twice", GetString (Name));
}
/* Allocate memory */
S = xmalloc (sizeof (SegDesc));
/* Initialize the fields */
S->Name = Name;
S->LI = GenLineInfo (&CfgErrorPos);
S->Seg = 0;
S->Attr = 0;
S->Flags = 0;
S->FillVal = 0;
S->RunAlignment = 1;
S->LoadAlignment = 1;
/* Insert the struct into the list ... */
CollAppend (&SegDescList, S);
/* ...and return it */
return S;
}
static void FreeSegDesc (SegDesc* S)
/* Free a segment descriptor */
{
FreeLineInfo (S->LI);
xfree (S);
}
/*****************************************************************************/
/* Config file parsing */
/*****************************************************************************/
static void FlagAttr (unsigned* Flags, unsigned Mask, const char* Name)
/* Check if the item is already defined. Print an error if so. If not, set
** the marker that we have a definition now.
*/
{
if (*Flags & Mask) {
CfgError (&CfgErrorPos, "%s is already defined", Name);
}
*Flags |= Mask;
}
static void AttrCheck (unsigned Attr, unsigned Mask, const char* Name)
/* Check that a mandatory attribute was given */
{
if ((Attr & Mask) == 0) {
CfgError (&CfgErrorPos, "%s attribute is missing", Name);
}
}
static void ParseMemory (void)
/* Parse a MEMORY section */
{
static const IdentTok Attributes [] = {
{ "BANK", CFGTOK_BANK },
{ "DEFINE", CFGTOK_DEFINE },
{ "FILE", CFGTOK_FILE },
{ "FILL", CFGTOK_FILL },
{ "FILLVAL", CFGTOK_FILLVAL },
{ "SIZE", CFGTOK_SIZE },
{ "START", CFGTOK_START },
{ "TYPE", CFGTOK_TYPE },
};
static const IdentTok Types [] = {
{ "RO", CFGTOK_RO },
{ "RW", CFGTOK_RW },
};
while (CfgTok == CFGTOK_IDENT) {
/* Create a new entry on the heap */
MemoryArea* M = CreateMemoryArea (&CfgErrorPos, GetStrBufId (&CfgSVal));
/* Skip the name and the following colon */
CfgNextTok ();
CfgConsumeColon ();
/* Read the attributes */
while (CfgTok == CFGTOK_IDENT) {
/* Map the identifier to a token */
cfgtok_t AttrTok;
CfgSpecialToken (Attributes, ENTRY_COUNT (Attributes), "Attribute");
AttrTok = CfgTok;
/* An optional assignment follows */
CfgNextTok ();
CfgOptionalAssign ();
/* Check which attribute was given */
switch (AttrTok) {
case CFGTOK_BANK:
FlagAttr (&M->Attr, MA_BANK, "BANK");
M->BankExpr = CfgExpr ();
break;
case CFGTOK_DEFINE:
FlagAttr (&M->Attr, MA_DEFINE, "DEFINE");
/* Map the token to a boolean */
CfgBoolToken ();
if (CfgTok == CFGTOK_TRUE) {
M->Flags |= MF_DEFINE;
}
CfgNextTok ();
break;
case CFGTOK_FILE:
FlagAttr (&M->Attr, MA_FILE, "FILE");
CfgAssureStr ();
/* Get the file entry and insert the memory area */
FileInsert (GetFile (GetStrBufId (&CfgSVal)), M);
CfgNextTok ();
break;
case CFGTOK_FILL:
FlagAttr (&M->Attr, MA_FILL, "FILL");
/* Map the token to a boolean */
CfgBoolToken ();
if (CfgTok == CFGTOK_TRUE) {
M->Flags |= MF_FILL;
}
CfgNextTok ();
break;
case CFGTOK_FILLVAL:
FlagAttr (&M->Attr, MA_FILLVAL, "FILLVAL");
M->FillVal = (unsigned char) CfgCheckedConstExpr (0, 0xFF);
break;
case CFGTOK_SIZE:
FlagAttr (&M->Attr, MA_SIZE, "SIZE");
M->SizeExpr = CfgExpr ();
break;
case CFGTOK_START:
FlagAttr (&M->Attr, MA_START, "START");
M->StartExpr = CfgExpr ();
break;
case CFGTOK_TYPE:
FlagAttr (&M->Attr, MA_TYPE, "TYPE");
CfgSpecialToken (Types, ENTRY_COUNT (Types), "TYPE");
if (CfgTok == CFGTOK_RO) {
M->Flags |= MF_RO;
}
CfgNextTok ();
break;
default:
FAIL ("Unexpected attribute token");
}
/* Skip an optional comma */
CfgOptionalComma ();
}
/* Skip the semicolon */
CfgConsumeSemi ();
/* Check for mandatory parameters */
AttrCheck (M->Attr, MA_START, "START");
AttrCheck (M->Attr, MA_SIZE, "SIZE");
/* If we don't have a file name for output given, use the default
** file name.
*/
if ((M->Attr & MA_FILE) == 0) {
FileInsert (GetFile (GetStringId (OutputName)), M);
OutputNameUsed = 1;
}
}
/* Remember we had this section */
SectionsEncountered |= SE_MEMORY;
}
static void ParseFiles (void)
/* Parse a FILES section */
{
static const IdentTok Attributes [] = {
{ "FORMAT", CFGTOK_FORMAT },
};
static const IdentTok Formats [] = {
{ "O65", CFGTOK_O65 },
{ "BIN", CFGTOK_BIN },
{ "BINARY", CFGTOK_BIN },
};
/* The MEMORY section must preceed the FILES section */
if ((SectionsEncountered & SE_MEMORY) == 0) {
CfgError (&CfgErrorPos, "MEMORY must precede FILES");
}
/* Parse all files */
while (CfgTok != CFGTOK_RCURLY) {
File* F;
/* We expect a string value here */
CfgAssureStr ();
/* Search for the file, it must exist */
F = FindFile (GetStrBufId (&CfgSVal));
if (F == 0) {
CfgError (&CfgErrorPos,
"File `%s' not found in MEMORY section",
SB_GetConstBuf (&CfgSVal));
}
/* Skip the token and the following colon */
CfgNextTok ();
CfgConsumeColon ();
/* Read the attributes */
while (CfgTok == CFGTOK_IDENT) {
/* Map the identifier to a token */
cfgtok_t AttrTok;
CfgSpecialToken (Attributes, ENTRY_COUNT (Attributes), "Attribute");
AttrTok = CfgTok;
/* An optional assignment follows */
CfgNextTok ();
CfgOptionalAssign ();
/* Check which attribute was given */
switch (AttrTok) {
case CFGTOK_FORMAT:
if (F->Format != BINFMT_DEFAULT) {
/* We've set the format already! */
CfgError (&CfgErrorPos,
"Cannot set a file format twice");
}
/* Read the format token */
CfgSpecialToken (Formats, ENTRY_COUNT (Formats), "Format");
switch (CfgTok) {
case CFGTOK_BIN:
F->Format = BINFMT_BINARY;
break;
case CFGTOK_O65:
F->Format = BINFMT_O65;
break;
default:
Error ("Unexpected format token");
}
break;
default:
FAIL ("Unexpected attribute token");
}
/* Skip the attribute value and an optional comma */
CfgNextTok ();
CfgOptionalComma ();
}
/* Skip the semicolon */
CfgConsumeSemi ();
}
/* Remember we had this section */
SectionsEncountered |= SE_FILES;
}
static void ParseSegments (void)
/* Parse a SEGMENTS section */
{
static const IdentTok Attributes [] = {
{ "ALIGN", CFGTOK_ALIGN },
{ "ALIGN_LOAD", CFGTOK_ALIGN_LOAD },
{ "DEFINE", CFGTOK_DEFINE },
{ "FILLVAL", CFGTOK_FILLVAL },
{ "LOAD", CFGTOK_LOAD },
{ "OFFSET", CFGTOK_OFFSET },
{ "OPTIONAL", CFGTOK_OPTIONAL },
{ "RUN", CFGTOK_RUN },
{ "START", CFGTOK_START },
{ "TYPE", CFGTOK_TYPE },
};
static const IdentTok Types [] = {
{ "RO", CFGTOK_RO },
{ "RW", CFGTOK_RW },
{ "BSS", CFGTOK_BSS },
{ "ZP", CFGTOK_ZP },
{ "REPLACE", CFGTOK_REPLACE },
};
unsigned Count;
/* The MEMORY section must preceed the SEGMENTS section */
if ((SectionsEncountered & SE_MEMORY) == 0) {
CfgError (&CfgErrorPos, "MEMORY must precede SEGMENTS");
}
while (CfgTok == CFGTOK_IDENT) {
SegDesc* S;
/* Create a new entry on the heap */
S = NewSegDesc (GetStrBufId (&CfgSVal));
/* Skip the name and the following colon */
CfgNextTok ();
CfgConsumeColon ();
/* Read the attributes */
while (CfgTok == CFGTOK_IDENT) {
/* Map the identifier to a token */
cfgtok_t AttrTok;
CfgSpecialToken (Attributes, ENTRY_COUNT (Attributes), "Attribute");
AttrTok = CfgTok;
/* An optional assignment follows */
CfgNextTok ();
CfgOptionalAssign ();
/* Check which attribute was given */
switch (AttrTok) {
case CFGTOK_ALIGN:
FlagAttr (&S->Attr, SA_ALIGN, "ALIGN");
S->RunAlignment = (unsigned) CfgCheckedConstExpr (1, MAX_ALIGNMENT);
S->Flags |= SF_ALIGN;
break;
case CFGTOK_ALIGN_LOAD:
FlagAttr (&S->Attr, SA_ALIGN_LOAD, "ALIGN_LOAD");
S->LoadAlignment = (unsigned) CfgCheckedConstExpr (1, MAX_ALIGNMENT);
S->Flags |= SF_ALIGN_LOAD;
break;
case CFGTOK_DEFINE:
FlagAttr (&S->Attr, SA_DEFINE, "DEFINE");
/* Map the token to a boolean */
CfgBoolToken ();
if (CfgTok == CFGTOK_TRUE) {
S->Flags |= SF_DEFINE;
}
CfgNextTok ();
break;
case CFGTOK_FILLVAL:
FlagAttr (&S->Attr, SA_FILLVAL, "FILLVAL");
S->FillVal = (unsigned char) CfgCheckedConstExpr (0, 0xFF);
S->Flags |= SF_FILLVAL;
break;
case CFGTOK_LOAD:
FlagAttr (&S->Attr, SA_LOAD, "LOAD");
S->Load = CfgGetMemory (GetStrBufId (&CfgSVal));
CfgNextTok ();
break;
case CFGTOK_OFFSET:
FlagAttr (&S->Attr, SA_OFFSET, "OFFSET");
S->Addr = CfgCheckedConstExpr (1, 0x1000000);
S->Flags |= SF_OFFSET;
break;
case CFGTOK_OPTIONAL:
FlagAttr (&S->Attr, SA_OPTIONAL, "OPTIONAL");
CfgBoolToken ();
if (CfgTok == CFGTOK_TRUE) {
S->Flags |= SF_OPTIONAL;
}
CfgNextTok ();
break;
case CFGTOK_RUN:
FlagAttr (&S->Attr, SA_RUN, "RUN");
S->Run = CfgGetMemory (GetStrBufId (&CfgSVal));
CfgNextTok ();
break;
case CFGTOK_START:
FlagAttr (&S->Attr, SA_START, "START");
S->Addr = CfgCheckedConstExpr (1, 0x1000000);
S->Flags |= SF_START;
break;
case CFGTOK_TYPE:
FlagAttr (&S->Attr, SA_TYPE, "TYPE");
CfgSpecialToken (Types, ENTRY_COUNT (Types), "Type");
switch (CfgTok) {
case CFGTOK_RO: S->Flags |= SF_RO; break;
case CFGTOK_RW: /* Default */ break;
case CFGTOK_BSS: S->Flags |= SF_BSS; break;
case CFGTOK_ZP: S->Flags |= (SF_BSS | SF_ZP); break;
case CFGTOK_REPLACE: S->Flags |= (SF_REPLACE | SF_RO); break;
default: Internal ("Unexpected token: %d", CfgTok);
}
CfgNextTok ();
break;
default:
FAIL ("Unexpected attribute token");
}
/* Skip an optional comma */
CfgOptionalComma ();
}
/* Check for mandatory parameters */
AttrCheck (S->Attr, SA_LOAD, "LOAD");
/* Set defaults for stuff not given */
if ((S->Attr & SA_RUN) == 0) {
S->Attr |= SA_RUN;
S->Run = S->Load;
}
/* An attribute of ALIGN_LOAD doesn't make sense if there are no
** separate run and load memory areas.
*/
if ((S->Flags & SF_ALIGN_LOAD) != 0 && (S->Load == S->Run)) {
CfgWarning (&CfgErrorPos,
"ALIGN_LOAD attribute specified, but no separate "
"LOAD and RUN memory areas assigned");
/* Remove the flag */
S->Flags &= ~SF_ALIGN_LOAD;
}
/* If the segment is marked as BSS style, it may not have separate
** load and run memory areas, because it's is never written to disk.
*/
if ((S->Flags & SF_BSS) != 0 && (S->Load != S->Run)) {
CfgWarning (&CfgErrorPos,
"Segment with type `bss' has both LOAD and RUN "
"memory areas assigned");
}
/* Don't allow read/write data to be put into a readonly area */
if ((S->Flags & SF_RO) == 0) {
if (S->Run->Flags & MF_RO) {
CfgError (&CfgErrorPos,
"Cannot put r/w segment `%s' in r/o memory area `%s'",
GetString (S->Name), GetString (S->Run->Name));
}
}
/* Only one of ALIGN, START and OFFSET may be used */
Count = ((S->Flags & SF_ALIGN) != 0) +
((S->Flags & SF_OFFSET) != 0) +
((S->Flags & SF_START) != 0);
if (Count > 1) {
CfgError (&CfgErrorPos,
"Only one of ALIGN, START, OFFSET may be used");
}
/* Skip the semicolon */
CfgConsumeSemi ();
}
/* Remember we had this section */
SectionsEncountered |= SE_SEGMENTS;
}
static void ParseO65 (void)
/* Parse the o65 format section */
{
static const IdentTok Attributes [] = {
{ "EXPORT", CFGTOK_EXPORT },
{ "IMPORT", CFGTOK_IMPORT },
{ "TYPE", CFGTOK_TYPE },
{ "OS", CFGTOK_OS },
{ "ID", CFGTOK_ID },
{ "VERSION", CFGTOK_VERSION },
};
static const IdentTok Types [] = {
{ "SMALL", CFGTOK_SMALL },
{ "LARGE", CFGTOK_LARGE },
};
static const IdentTok OperatingSystems [] = {
{ "LUNIX", CFGTOK_LUNIX },
{ "OSA65", CFGTOK_OSA65 },
{ "CC65", CFGTOK_CC65 },
{ "OPENCBM", CFGTOK_OPENCBM },
};
/* Bitmask to remember the attributes we got already */
enum {
atNone = 0x0000,
atOS = 0x0001,
atOSVersion = 0x0002,
atType = 0x0004,
atImport = 0x0008,
atExport = 0x0010,
atID = 0x0020,
atVersion = 0x0040
};
unsigned AttrFlags = atNone;
/* Remember the attributes read */
unsigned OS = 0; /* Initialize to keep gcc happy */
unsigned Version = 0;
/* Read the attributes */
while (CfgTok == CFGTOK_IDENT) {
/* Map the identifier to a token */
cfgtok_t AttrTok;
CfgSpecialToken (Attributes, ENTRY_COUNT (Attributes), "Attribute");
AttrTok = CfgTok;
/* An optional assignment follows */
CfgNextTok ();
CfgOptionalAssign ();
/* Check which attribute was given */
switch (AttrTok) {
case CFGTOK_EXPORT:
/* Remember we had this token (maybe more than once) */
AttrFlags |= atExport;
/* We expect an identifier */
CfgAssureIdent ();
/* Remember it as an export for later */
NewCfgSymbol (CfgSymO65Export, GetStrBufId (&CfgSVal));
/* Eat the identifier token */
CfgNextTok ();
break;
case CFGTOK_IMPORT:
/* Remember we had this token (maybe more than once) */
AttrFlags |= atImport;
/* We expect an identifier */
CfgAssureIdent ();
/* Remember it as an import for later */
NewCfgSymbol (CfgSymO65Import, GetStrBufId (&CfgSVal));
/* Eat the identifier token */
CfgNextTok ();
break;
case CFGTOK_TYPE:
/* Cannot have this attribute twice */
FlagAttr (&AttrFlags, atType, "TYPE");
/* Get the type of the executable */
CfgSpecialToken (Types, ENTRY_COUNT (Types), "Type");
switch (CfgTok) {
case CFGTOK_SMALL:
O65SetSmallModel (O65FmtDesc);
break;
case CFGTOK_LARGE:
O65SetLargeModel (O65FmtDesc);
break;
default:
CfgError (&CfgErrorPos, "Unexpected type token");
}
/* Eat the attribute token */
CfgNextTok ();
break;
case CFGTOK_OS:
/* Cannot use this attribute twice */
FlagAttr (&AttrFlags, atOS, "OS");
/* Get the operating system. It may be specified as name or
** as a number in the range 1..255.
*/
if (CfgTok == CFGTOK_INTCON) {
CfgRangeCheck (O65OS_MIN, O65OS_MAX);
OS = (unsigned) CfgIVal;
} else {
CfgSpecialToken (OperatingSystems, ENTRY_COUNT (OperatingSystems), "OS type");
switch (CfgTok) {
case CFGTOK_LUNIX: OS = O65OS_LUNIX; break;
case CFGTOK_OSA65: OS = O65OS_OSA65; break;
case CFGTOK_CC65: OS = O65OS_CC65; break;
case CFGTOK_OPENCBM: OS = O65OS_OPENCBM; break;
default: CfgError (&CfgErrorPos, "Unexpected OS token");
}
}
CfgNextTok ();
break;
case CFGTOK_ID:
/* Cannot have this attribute twice */
FlagAttr (&AttrFlags, atID, "ID");
/* We're expecting a number in the 0..$FFFF range*/
ModuleId = (unsigned) CfgCheckedConstExpr (0, 0xFFFF);
break;
case CFGTOK_VERSION:
/* Cannot have this attribute twice */
FlagAttr (&AttrFlags, atVersion, "VERSION");
/* We're expecting a number in byte range */
Version = (unsigned) CfgCheckedConstExpr (0, 0xFF);
break;
default:
FAIL ("Unexpected attribute token");
}
/* Skip an optional comma */
CfgOptionalComma ();
}
/* Check if we have all mandatory attributes */
AttrCheck (AttrFlags, atOS, "OS");
/* Check for attributes that may not be combined */
if (OS == O65OS_CC65) {
if ((AttrFlags & (atImport | atExport)) != 0 && ModuleId < 0x8000) {
CfgError (&CfgErrorPos,
"OS type CC65 may not have imports or exports for ids < $8000");
}
} else {
if (AttrFlags & atID) {
CfgError (&CfgErrorPos,
"Operating system does not support the ID attribute");
}
}
/* Set the O65 operating system to use */
O65SetOS (O65FmtDesc, OS, Version, ModuleId);
}
static void ParseFormats (void)
/* Parse a target format section */
{
static const IdentTok Formats [] = {
{ "O65", CFGTOK_O65 },
{ "BIN", CFGTOK_BIN },
{ "BINARY", CFGTOK_BIN },
};
while (CfgTok == CFGTOK_IDENT) {
/* Map the identifier to a token */
cfgtok_t FormatTok;
CfgSpecialToken (Formats, ENTRY_COUNT (Formats), "Format");
FormatTok = CfgTok;
/* Skip the name and the following colon */
CfgNextTok ();
CfgConsumeColon ();
/* Parse the format options */
switch (FormatTok) {
case CFGTOK_O65:
ParseO65 ();
break;
case CFGTOK_BIN:
/* No attribibutes available */
break;
default:
Error ("Unexpected format token");
}
/* Skip the semicolon */
CfgConsumeSemi ();
}
/* Remember we had this section */
SectionsEncountered |= SE_FORMATS;
}
static void ParseConDes (void)
/* Parse the CONDES feature */
{
static const IdentTok Attributes [] = {
{ "COUNT", CFGTOK_COUNT },
{ "IMPORT", CFGTOK_IMPORT },
{ "LABEL", CFGTOK_LABEL },
{ "ORDER", CFGTOK_ORDER },
{ "SEGMENT", CFGTOK_SEGMENT },
{ "TYPE", CFGTOK_TYPE },
};
static const IdentTok Types [] = {
{ "CONSTRUCTOR", CFGTOK_CONSTRUCTOR },
{ "DESTRUCTOR", CFGTOK_DESTRUCTOR },
{ "INTERRUPTOR", CFGTOK_INTERRUPTOR },
};
static const IdentTok Orders [] = {
{ "DECREASING", CFGTOK_DECREASING },
{ "INCREASING", CFGTOK_INCREASING },
};
/* Attribute values. */
unsigned Count = INVALID_STRING_ID;
unsigned Label = INVALID_STRING_ID;
unsigned SegName = INVALID_STRING_ID;
ConDesImport Import;
/* Initialize to avoid gcc warnings: */
int Type = -1;
ConDesOrder Order = cdIncreasing;
/* Bitmask to remember the attributes we got already */
enum {
atNone = 0x0000,
atCount = 0x0001,
atImport = 0x0002,
atLabel = 0x0004,
atOrder = 0x0008,
atSegName = 0x0010,
atType = 0x0020,
};
unsigned AttrFlags = atNone;
/* Parse the attributes */
while (1) {
/* Map the identifier to a token */
cfgtok_t AttrTok;
CfgSpecialToken (Attributes, ENTRY_COUNT (Attributes), "Attribute");
AttrTok = CfgTok;
/* An optional assignment follows */
CfgNextTok ();
CfgOptionalAssign ();
/* Check which attribute was given */
switch (AttrTok) {
case CFGTOK_COUNT:
/* Don't allow this twice */
FlagAttr (&AttrFlags, atCount, "COUNT");
/* We expect an identifier */
CfgAssureIdent ();
/* Remember the value for later */
Count = GetStrBufId (&CfgSVal);
break;
case CFGTOK_IMPORT:
/* Don't allow this twice */
FlagAttr (&AttrFlags, atImport, "IMPORT");
/* We expect an identifier */
CfgAssureIdent ();
/* Remember value and position for later */
Import.Name = GetStrBufId (&CfgSVal);
Import.Pos = CfgErrorPos;
Import.AddrSize = ADDR_SIZE_ABS;
break;
case CFGTOK_LABEL:
/* Don't allow this twice */
FlagAttr (&AttrFlags, atLabel, "LABEL");
/* We expect an identifier */
CfgAssureIdent ();
/* Remember the value for later */
Label = GetStrBufId (&CfgSVal);
break;
case CFGTOK_ORDER:
/* Don't allow this twice */
FlagAttr (&AttrFlags, atOrder, "ORDER");
CfgSpecialToken (Orders, ENTRY_COUNT (Orders), "Order");
switch (CfgTok) {
case CFGTOK_DECREASING: Order = cdDecreasing; break;
case CFGTOK_INCREASING: Order = cdIncreasing; break;
default: FAIL ("Unexpected order token");
}
break;
case CFGTOK_SEGMENT:
/* Don't allow this twice */
FlagAttr (&AttrFlags, atSegName, "SEGMENT");
/* We expect an identifier */
CfgAssureIdent ();
/* Remember the value for later */
SegName = GetStrBufId (&CfgSVal);
break;
case CFGTOK_TYPE:
/* Don't allow this twice */
FlagAttr (&AttrFlags, atType, "TYPE");
/* The type may be given as id or numerical */
if (CfgTok == CFGTOK_INTCON) {
CfgRangeCheck (CD_TYPE_MIN, CD_TYPE_MAX);
Type = (int) CfgIVal;
} else {
CfgSpecialToken (Types, ENTRY_COUNT (Types), "Type");
switch (CfgTok) {
case CFGTOK_CONSTRUCTOR: Type = CD_TYPE_CON; break;
case CFGTOK_DESTRUCTOR: Type = CD_TYPE_DES; break;
case CFGTOK_INTERRUPTOR: Type = CD_TYPE_INT; break;
default: FAIL ("Unexpected type token");
}
}
break;
default:
FAIL ("Unexpected attribute token");
}
/* Skip the attribute value */
CfgNextTok ();
/* Semicolon ends the ConDes decl, otherwise accept an optional comma */
if (CfgTok == CFGTOK_SEMI) {
break;
} else if (CfgTok == CFGTOK_COMMA) {
CfgNextTok ();
}
}
/* Check if we have all mandatory attributes */
AttrCheck (AttrFlags, atSegName, "SEGMENT");
AttrCheck (AttrFlags, atLabel, "LABEL");
AttrCheck (AttrFlags, atType, "TYPE");
/* Check if the condes has already attributes defined */
if (ConDesHasSegName(Type) || ConDesHasLabel(Type)) {
CfgError (&CfgErrorPos,
"CONDES attributes for type %d are already defined",
Type);
}
/* Define the attributes */
ConDesSetSegName (Type, SegName);
ConDesSetLabel (Type, Label);
if (AttrFlags & atCount) {
ConDesSetCountSym (Type, Count);
}
if (AttrFlags & atImport) {
ConDesSetImport (Type, &Import);
}
if (AttrFlags & atOrder) {
ConDesSetOrder (Type, Order);
}
}
static void ParseStartAddress (void)
/* Parse the STARTADDRESS feature */
{
static const IdentTok Attributes [] = {
{ "DEFAULT", CFGTOK_DEFAULT },
};
/* Attribute values. */
unsigned long DefStartAddr = 0;
/* Bitmask to remember the attributes we got already */
enum {
atNone = 0x0000,
atDefault = 0x0001
};
unsigned AttrFlags = atNone;
/* Parse the attributes */
while (1) {
/* Map the identifier to a token */
cfgtok_t AttrTok;
CfgSpecialToken (Attributes, ENTRY_COUNT (Attributes), "Attribute");
AttrTok = CfgTok;
/* An optional assignment follows */
CfgNextTok ();
CfgOptionalAssign ();
/* Check which attribute was given */
switch (AttrTok) {
case CFGTOK_DEFAULT:
/* Don't allow this twice */
FlagAttr (&AttrFlags, atDefault, "DEFAULT");
/* We expect a numeric expression */
DefStartAddr = CfgCheckedConstExpr (0, 0xFFFFFF);
break;
default:
FAIL ("Unexpected attribute token");
}
/* Semicolon ends the ConDes decl, otherwise accept an optional comma */
if (CfgTok == CFGTOK_SEMI) {
break;
} else if (CfgTok == CFGTOK_COMMA) {
CfgNextTok ();
}
}
/* Check if we have all mandatory attributes */
AttrCheck (AttrFlags, atDefault, "DEFAULT");
/* If no start address was given on the command line, use the one given
** here
*/
if (!HaveStartAddr) {
StartAddr = DefStartAddr;
}
}
static void ParseFeatures (void)
/* Parse a features section */
{
static const IdentTok Features [] = {
{ "CONDES", CFGTOK_CONDES },
{ "STARTADDRESS", CFGTOK_STARTADDRESS },
};
while (CfgTok == CFGTOK_IDENT) {
/* Map the identifier to a token */
cfgtok_t FeatureTok;
CfgSpecialToken (Features, ENTRY_COUNT (Features), "Feature");
FeatureTok = CfgTok;
/* Skip the name and the following colon */
CfgNextTok ();
CfgConsumeColon ();
/* Parse the format options */
switch (FeatureTok) {
case CFGTOK_CONDES:
ParseConDes ();
break;
case CFGTOK_STARTADDRESS:
ParseStartAddress ();
break;
default:
FAIL ("Unexpected feature token");
}
/* Skip the semicolon */
CfgConsumeSemi ();
}
/* Remember we had this section */
SectionsEncountered |= SE_FEATURES;
}
static void ParseSymbols (void)
/* Parse a symbols section */
{
static const IdentTok Attributes[] = {
{ "ADDRSIZE", CFGTOK_ADDRSIZE },
{ "TYPE", CFGTOK_TYPE },
{ "VALUE", CFGTOK_VALUE },
};
static const IdentTok AddrSizes [] = {
{ "ABS", CFGTOK_ABS },
{ "ABSOLUTE", CFGTOK_ABS },
{ "DIRECT", CFGTOK_ZP },
{ "DWORD", CFGTOK_LONG },
{ "FAR", CFGTOK_FAR },
{ "LONG", CFGTOK_LONG },
{ "NEAR", CFGTOK_ABS },
{ "ZEROPAGE", CFGTOK_ZP },
{ "ZP", CFGTOK_ZP },
};
static const IdentTok Types [] = {
{ "EXPORT", CFGTOK_EXPORT },
{ "IMPORT", CFGTOK_IMPORT },
{ "WEAK", CFGTOK_WEAK },
};
while (CfgTok == CFGTOK_IDENT) {
/* Bitmask to remember the attributes we got already */
enum {
atNone = 0x0000,
atAddrSize = 0x0001,
atType = 0x0002,
atValue = 0x0004,
};
unsigned AttrFlags = atNone;
ExprNode* Value = 0;
CfgSymType Type = CfgSymExport;
unsigned char AddrSize = ADDR_SIZE_ABS;
Import* Imp;
Export* Exp;
CfgSymbol* Sym;
/* Remember the name */
unsigned Name = GetStrBufId (&CfgSVal);
CfgNextTok ();
/* New syntax - skip the colon */
CfgNextTok ();
/* Parse the attributes */
while (1) {
/* Map the identifier to a token */
cfgtok_t AttrTok;
CfgSpecialToken (Attributes, ENTRY_COUNT (Attributes), "Attribute");
AttrTok = CfgTok;
/* Skip the attribute name */
CfgNextTok ();
/* An optional assignment follows */
CfgOptionalAssign ();
/* Check which attribute was given */
switch (AttrTok) {
case CFGTOK_ADDRSIZE:
/* Don't allow this twice */
FlagAttr (&AttrFlags, atAddrSize, "ADDRSIZE");
/* Map the type to a token */
CfgSpecialToken (AddrSizes, ENTRY_COUNT (AddrSizes), "AddrSize");
switch (CfgTok) {
case CFGTOK_ABS: AddrSize = ADDR_SIZE_ABS; break;
case CFGTOK_FAR: AddrSize = ADDR_SIZE_FAR; break;
case CFGTOK_LONG: AddrSize = ADDR_SIZE_LONG; break;
case CFGTOK_ZP: AddrSize = ADDR_SIZE_ZP; break;
default:
Internal ("Unexpected token: %d", CfgTok);
}
CfgNextTok ();
break;
case CFGTOK_TYPE:
/* Don't allow this twice */
FlagAttr (&AttrFlags, atType, "TYPE");
/* Map the type to a token */
CfgSpecialToken (Types, ENTRY_COUNT (Types), "Type");
switch (CfgTok) {
case CFGTOK_EXPORT: Type = CfgSymExport; break;
case CFGTOK_IMPORT: Type = CfgSymImport; break;
case CFGTOK_WEAK: Type = CfgSymWeak; break;
default:
Internal ("Unexpected token: %d", CfgTok);
}
CfgNextTok ();
break;
case CFGTOK_VALUE:
/* Don't allow this twice */
FlagAttr (&AttrFlags, atValue, "VALUE");
/* Value is an expression */
Value = CfgExpr ();
break;
default:
FAIL ("Unexpected attribute token");
}
/* Semicolon ends the decl, otherwise accept an optional comma */
if (CfgTok == CFGTOK_SEMI) {
break;
} else if (CfgTok == CFGTOK_COMMA) {
CfgNextTok ();
}
}
/* We must have a type */
AttrCheck (AttrFlags, atType, "TYPE");
/* Further actions depend on the type */
switch (Type) {
case CfgSymExport:
/* We must have a value */
AttrCheck (AttrFlags, atValue, "VALUE");
/* Create the export */
Exp = CreateExprExport (Name, Value, AddrSize);
CollAppend (&Exp->DefLines, GenLineInfo (&CfgErrorPos));
break;
case CfgSymImport:
/* An import must not have a value */
if (AttrFlags & atValue) {
CfgError (&CfgErrorPos, "Imports must not have a value");
}
/* Generate the import */
Imp = InsertImport (GenImport (Name, AddrSize));
/* Remember the file position */
CollAppend (&Imp->RefLines, GenLineInfo (&CfgErrorPos));
break;
case CfgSymWeak:
/* We must have a value */
AttrCheck (AttrFlags, atValue, "VALUE");
/* Remember the symbol for later */
Sym = NewCfgSymbol (CfgSymWeak, Name);
Sym->Value = Value;
Sym->AddrSize = AddrSize;
break;
default:
Internal ("Unexpected symbol type %d", Type);
}
/* Skip the semicolon */
CfgConsumeSemi ();
}
/* Remember we had this section */
SectionsEncountered |= SE_SYMBOLS;
}
static void ParseConfig (void)
/* Parse the config file */
{
static const IdentTok BlockNames [] = {
{ "MEMORY", CFGTOK_MEMORY },
{ "FILES", CFGTOK_FILES },
{ "SEGMENTS", CFGTOK_SEGMENTS },
{ "FORMATS", CFGTOK_FORMATS },
{ "FEATURES", CFGTOK_FEATURES },
{ "SYMBOLS", CFGTOK_SYMBOLS },
};
cfgtok_t BlockTok;
do {
/* Read the block ident */
CfgSpecialToken (BlockNames, ENTRY_COUNT (BlockNames), "Block identifier");
BlockTok = CfgTok;
CfgNextTok ();
/* Expected a curly brace */
CfgConsume (CFGTOK_LCURLY, "`{' expected");
/* Read the block */
switch (BlockTok) {
case CFGTOK_MEMORY:
ParseMemory ();
break;
case CFGTOK_FILES:
ParseFiles ();
break;
case CFGTOK_SEGMENTS:
ParseSegments ();
break;
case CFGTOK_FORMATS:
ParseFormats ();
break;
case CFGTOK_FEATURES:
ParseFeatures ();
break;
case CFGTOK_SYMBOLS:
ParseSymbols ();
break;
default:
FAIL ("Unexpected block token");
}
/* Skip closing brace */
CfgConsume (CFGTOK_RCURLY, "`}' expected");
} while (CfgTok != CFGTOK_EOF);
}
void CfgRead (void)
/* Read the configuration */
{
/* Create the descriptors for the binary formats */
BinFmtDesc = NewBinDesc ();
O65FmtDesc = NewO65Desc ();
/* If we have a config name given, open the file, otherwise we will read
** from a buffer.
*/
CfgOpenInput ();
/* Parse the file */
ParseConfig ();
/* Close the input file */
CfgCloseInput ();
}
/*****************************************************************************/
/* Config file processing */
/*****************************************************************************/
static void ProcessSegments (void)
/* Process the SEGMENTS section */
{
unsigned I;
/* Walk over the list of segment descriptors */
I = 0;
while (I < CollCount (&SegDescList)) {
/* Get the next segment descriptor */
SegDesc* S = CollAtUnchecked (&SegDescList, I);
/* Search for the actual segment in the input files. The function may
** return NULL (no such segment), this is checked later.
*/
S->Seg = SegFind (S->Name);
/* If the segment is marked as BSS style, and if the segment exists
** in any of the object file, check that there's no initialized data
** in the segment.
*/
if ((S->Flags & SF_BSS) != 0 && S->Seg != 0 && !IsBSSType (S->Seg)) {
CfgWarning (GetSourcePos (S->LI),
"Segment `%s' with type `bss' contains initialized data",
GetString (S->Name));
}
/* If this segment does exist in any of the object files, insert the
** segment into the load/run memory areas. Otherwise print a warning
** and discard it, because the segment pointer in the descriptor is
** invalid.
*/
if (S->Seg != 0) {
/* Insert the segment into the memory area list */
MemoryInsert (S->Run, S);
if (S->Load != S->Run) {
/* We have separate RUN and LOAD areas */
MemoryInsert (S->Load, S);
}
/* Use the fill value from the config */
S->Seg->FillVal = S->FillVal;
/* Process the next segment descriptor in the next run */
++I;
} else {
/* Print a warning if the segment is not optional */
if ((S->Flags & SF_OPTIONAL) == 0) {
CfgWarning (&CfgErrorPos,
"Segment `%s' does not exist",
GetString (S->Name));
}
/* Discard the descriptor and remove it from the collection */
FreeSegDesc (S);
CollDelete (&SegDescList, I);
}
}
}
static void ProcessSymbols (void)
/* Process the SYMBOLS section */
{
Export* E;
/* Walk over all symbols */
unsigned I;
for (I = 0; I < CollCount (&CfgSymbols); ++I) {
/* Get the next symbol */
CfgSymbol* Sym = CollAtUnchecked (&CfgSymbols, I);
/* Check what it is. */
switch (Sym->Type) {
case CfgSymO65Export:
/* Check if the export symbol is also defined as an import. */
if (O65GetImport (O65FmtDesc, Sym->Name) != 0) {
CfgError (
GetSourcePos (Sym->LI),
"Exported o65 symbol `%s' cannot also be an o65 import",
GetString (Sym->Name)
);
}
/* Check if we have this symbol defined already. The entry
** routine will check this also, but we get a more verbose
** error message when checking it here.
*/
if (O65GetExport (O65FmtDesc, Sym->Name) != 0) {
CfgError (
GetSourcePos (Sym->LI),
"Duplicate exported o65 symbol: `%s'",
GetString (Sym->Name)
);
}
/* Insert the symbol into the table */
O65SetExport (O65FmtDesc, Sym->Name);
break;
case CfgSymO65Import:
/* Check if the import symbol is also defined as an export. */
if (O65GetExport (O65FmtDesc, Sym->Name) != 0) {
CfgError (
GetSourcePos (Sym->LI),
"Imported o65 symbol `%s' cannot also be an o65 export",
GetString (Sym->Name)
);
}
/* Check if we have this symbol defined already. The entry
** routine will check this also, but we get a more verbose
** error message when checking it here.
*/
if (O65GetImport (O65FmtDesc, Sym->Name) != 0) {
CfgError (
GetSourcePos (Sym->LI),
"Duplicate imported o65 symbol: `%s'",
GetString (Sym->Name)
);
}
/* Insert the symbol into the table */
O65SetImport (O65FmtDesc, Sym->Name);
break;
case CfgSymWeak:
/* If the symbol is not defined until now, define it */
if ((E = FindExport (Sym->Name)) == 0 || IsUnresolvedExport (E)) {
/* The symbol is undefined, generate an export */
E = CreateExprExport (Sym->Name, Sym->Value, Sym->AddrSize);
CollAppend (&E->DefLines, Sym->LI);
}
break;
default:
Internal ("Unexpected symbol type %d", Sym->Type);
break;
}
}
}
static void CreateRunDefines (SegDesc* S, unsigned long SegAddr)
/* Create the defines for a RUN segment */
{
Export* E;
StrBuf Buf = STATIC_STRBUF_INITIALIZER;
/* Define the run address of the segment */
SB_Printf (&Buf, "__%s_RUN__", GetString (S->Name));
E = CreateMemoryExport (GetStrBufId (&Buf), S->Run, SegAddr - S->Run->Start);
CollAppend (&E->DefLines, S->LI);
/* Define the size of the segment */
SB_Printf (&Buf, "__%s_SIZE__", GetString (S->Name));
E = CreateConstExport (GetStrBufId (&Buf), S->Seg->Size);
CollAppend (&E->DefLines, S->LI);
S->Flags |= SF_RUN_DEF;
SB_Done (&Buf);
}
static void CreateLoadDefines (SegDesc* S, unsigned long SegAddr)
/* Create the defines for a LOAD segment */
{
Export* E;
StrBuf Buf = STATIC_STRBUF_INITIALIZER;
/* Define the load address of the segment */
SB_Printf (&Buf, "__%s_LOAD__", GetString (S->Name));
E = CreateMemoryExport (GetStrBufId (&Buf), S->Load, SegAddr - S->Load->Start);
CollAppend (&E->DefLines, S->LI);
S->Flags |= SF_LOAD_DEF;
SB_Done (&Buf);
}
unsigned CfgProcess (void)
/* Process the config file, after reading in object files and libraries. This
** includes postprocessing of the config file data; but also assigning segments,
** and defining segment/memory-area related symbols. The function will return
** the number of memory area overflows (so, zero means everything went OK).
** In case of overflows, a short mapfile can be generated later, to ease the
** user's task of re-arranging segments.
*/
{
unsigned Overflows = 0;
unsigned I;
/* Postprocess symbols. We must do that first, since weak symbols are
** defined here, which may be needed later.
*/
ProcessSymbols ();
/* Postprocess segments */
ProcessSegments ();
/* Walk through each of the memory sections. Add up the sizes; and, check
** for an overflow of the section. Assign the start addresses of the
** segments while doing that.
*/
for (I = 0; I < CollCount (&MemoryAreas); ++I) {
unsigned J;
unsigned long Addr;
unsigned Overlays = 0;
/* Get the next memory area */
MemoryArea* M = CollAtUnchecked (&MemoryAreas, I);
/* Remember the offset in the output file */
M->FileOffs = M->F->Size;
/* Remember if this is a relocatable memory area */
M->Relocatable = RelocatableBinFmt (M->F->Format);
/* Resolve the start address expression, remember the start address,
** and mark the memory area as placed.
*/
if (!IsConstExpr (M->StartExpr)) {
CfgError (GetSourcePos (M->LI),
"Start address of memory area `%s' is not constant",
GetString (M->Name));
}
Addr = M->Start = GetExprVal (M->StartExpr);
M->Flags |= MF_PLACED;
/* If requested, define the symbol for the start of the memory area.
** Doing it here means that the expression for the size of the area
** may reference this symbol.
*/
if (M->Flags & MF_DEFINE) {
Export* E;
StrBuf Buf = STATIC_STRBUF_INITIALIZER;
/* Define the start of the memory area */
SB_Printf (&Buf, "__%s_START__", GetString (M->Name));
E = CreateMemoryExport (GetStrBufId (&Buf), M, 0);
CollAppend (&E->DefLines, M->LI);
SB_Done (&Buf);
}
/* Resolve the size expression */
if (!IsConstExpr (M->SizeExpr)) {
CfgError (GetSourcePos (M->LI),
"Size of memory area `%s' is not constant",
GetString (M->Name));
}
M->Size = GetExprVal (M->SizeExpr);
/* Walk through the segments in this memory area */
for (J = 0; J < CollCount (&M->SegList); ++J) {
/* Get the segment */
SegDesc* S = CollAtUnchecked (&M->SegList, J);
/* Remember the start address before handling this segment */
unsigned long StartAddr = Addr;
/* Take note of overlayed segments and make sure there are no other
** segment types following them in current memory region.
*/
if (S->Flags & SF_REPLACE) {
if (S->Flags & (SF_OFFSET | SF_START)) {
++Overlays;
} else {
CfgError (GetSourcePos (M->LI),
"Segment `%s' of type `overlay' requires either"
" `Start' or `Offset' attribute to be specified",
GetString (S->Name));
}
} else {
if (Overlays > 0) {
CfgError (GetSourcePos (M->LI),
"Segment `%s' is preceded by at least one segment"
" of type `overlay'",
GetString (S->Name));
}
}
/* Some actions depend on whether this is the load or run memory
** area.
*/
if (S->Run == M) {
/* This is the run (and maybe load) memory area. Handle
** alignment and explict start address and offset.
*/
/* Check if the alignment for the segment from the linker
** config. is a multiple for that of the segment.
*/
if ((S->RunAlignment % S->Seg->Alignment) != 0) {
/* Segment requires another alignment than configured
** in the linker.
*/
CfgWarning (GetSourcePos (S->LI),
"Segment `%s' isn't aligned properly; the"
" resulting executable might not be functional.",
GetString (S->Name));
}
if (S->Flags & SF_ALIGN) {
/* Align the address */
unsigned long NewAddr = AlignAddr (Addr, S->RunAlignment);
/* If the first segment placed in the memory area needs
** fill bytes for the alignment, emit a warning, since
** that is somewhat suspicious.
*/
if (M->FillLevel == 0 && NewAddr > Addr) {
CfgWarning (GetSourcePos (S->LI),
"The first segment in memory area `%s' "
"needs fill bytes for alignment.",
GetString (M->Name));
}
/* Use the aligned address */
Addr = NewAddr;
} else if ((S->Flags & (SF_OFFSET | SF_START)) != 0 &&
(M->Flags & MF_OVERFLOW) == 0) {
/* Give the segment a fixed starting address */
unsigned long NewAddr = S->Addr;
if (S->Flags & SF_OFFSET) {
/* An offset was given, no address, make an address */
NewAddr += M->Start;
}
if (S->Flags & SF_REPLACE) {
if (NewAddr < M->Start) {
CfgError (GetSourcePos (S->LI),
"Segment `%s' begins before memory area `%s'",
GetString (S->Name), GetString (M->Name));
} else {
Addr = NewAddr;
}
} else {
if (NewAddr < Addr) {
/* Offset already too large */
++Overflows;
if (S->Flags & SF_OFFSET) {
CfgWarning (GetSourcePos (S->LI),
"Segment `%s' offset is too small in `%s' by %lu byte%c",
GetString (S->Name), GetString (M->Name),
Addr - NewAddr, (Addr - NewAddr == 1) ? ' ' : 's');
} else {
CfgWarning (GetSourcePos (S->LI),
"Segment `%s' start address is too low in `%s' by %lu byte%c",
GetString (S->Name), GetString (M->Name),
Addr - NewAddr, (Addr - NewAddr == 1) ? ' ' : 's');
}
} else {
Addr = NewAddr;
}
}
}
/* Set the start address of this segment, set the readonly flag
** in the segment, and remember if the segment is in a
** relocatable file or not.
*/
S->Seg->PC = Addr;
S->Seg->ReadOnly = (S->Flags & SF_RO) != 0;
/* Remember the run memory for this segment, which is also a
** flag that the segment has been placed.
*/
S->Seg->MemArea = M;
} else if (S->Load == M) {
/* This is the load memory area; *and*, run and load are
** different (because of the "else" above). Handle alignment.
*/
if (S->Flags & SF_ALIGN_LOAD) {
/* Align the address */
Addr = AlignAddr (Addr, S->LoadAlignment);
}
}
/* If this is the load memory area, and the segment doesn't have a
** fill value defined, use the one from the memory area.
*/
if (S->Load == M && (S->Flags & SF_FILLVAL) == 0) {
S->Seg->FillVal = M->FillVal;
}
/* Increment the fill level of the memory area; and, check for an
** overflow.
*/
M->FillLevel = Addr + S->Seg->Size - M->Start;
if (M->FillLevel > M->Size && (M->Flags & MF_OVERFLOW) == 0) {
++Overflows;
M->Flags |= MF_OVERFLOW;
CfgWarning (GetSourcePos (M->LI),
"Segment `%s' overflows memory area `%s' by %lu byte%c",
GetString (S->Name), GetString (M->Name),
M->FillLevel - M->Size, (M->FillLevel - M->Size == 1) ? ' ' : 's');
}
/* If requested, define symbols for the start and size of the
** segment.
*/
if (S->Flags & SF_DEFINE) {
if (S->Run == M && (S->Flags & SF_RUN_DEF) == 0) {
CreateRunDefines (S, Addr);
}
if (S->Load == M && (S->Flags & SF_LOAD_DEF) == 0) {
CreateLoadDefines (S, Addr);
}
}
/* Calculate the new address */
Addr += S->Seg->Size;
/* If this segment will go out to the file, or its place
** in the file will be filled, then increase the file size.
*/
if (S->Load == M &&
((S->Flags & SF_BSS) == 0 || (M->Flags & MF_FILL) != 0)) {
M->F->Size += Addr - StartAddr;
}
}
/* If requested, define symbols for start, size, and offset of the
** memory area
*/
if (M->Flags & MF_DEFINE) {
Export* E;
StrBuf Buf = STATIC_STRBUF_INITIALIZER;
/* Define the size of the memory area */
SB_Printf (&Buf, "__%s_SIZE__", GetString (M->Name));
E = CreateConstExport (GetStrBufId (&Buf), M->Size);
CollAppend (&E->DefLines, M->LI);
/* Define the fill level of the memory area */
SB_Printf (&Buf, "__%s_LAST__", GetString (M->Name));
E = CreateMemoryExport (GetStrBufId (&Buf), M, M->FillLevel);
CollAppend (&E->DefLines, M->LI);
/* Define the file offset of the memory area. This isn't of much
** use for relocatable output files.
*/
if (!M->Relocatable) {
SB_Printf (&Buf, "__%s_FILEOFFS__", GetString (M->Name));
E = CreateConstExport (GetStrBufId (&Buf), M->FileOffs);
CollAppend (&E->DefLines, M->LI);
}
/* Throw away the string buffer */
SB_Done (&Buf);
}
/* If we didn't have an overflow, and are requested to fill the memory
** area, account for that in the file size.
*/
if ((M->Flags & MF_OVERFLOW) == 0 && (M->Flags & MF_FILL) != 0) {
M->F->Size += (M->Size - M->FillLevel);
}
}
/* Return the number of memory area overflows */
return Overflows;
}
void CfgWriteTarget (void)
/* Write the target file(s) */
{
unsigned I;
/* Walk through the files list */
for (I = 0; I < CollCount (&FileList); ++I) {
/* Get this entry */
File* F = CollAtUnchecked (&FileList, I);
/* We don't need to look at files with no memory areas */
if (CollCount (&F->MemoryAreas) > 0) {
/* Is there an output file? */
if (SB_GetLen (GetStrBuf (F->Name)) > 0) {
/* Assign a proper binary format */
if (F->Format == BINFMT_DEFAULT) {
F->Format = DefaultBinFmt;
}
/* Call the apropriate routine for the binary format */
switch (F->Format) {
case BINFMT_BINARY:
BinWriteTarget (BinFmtDesc, F);
break;
case BINFMT_O65:
O65WriteTarget (O65FmtDesc, F);
break;
default:
Internal ("Invalid binary format: %u", F->Format);
}
} else {
/* No output file. Walk through the list and mark all segments
** loading into these memory areas in this file as dumped.
*/
unsigned J;
for (J = 0; J < CollCount (&F->MemoryAreas); ++J) {
unsigned K;
/* Get this entry */
MemoryArea* M = CollAtUnchecked (&F->MemoryAreas, J);
/* Debugging */
Print (stdout, 2, "Skipping `%s'...\n", GetString (M->Name));
/* Walk throught the segments */
for (K = 0; K < CollCount (&M->SegList); ++K) {
SegDesc* S = CollAtUnchecked (&M->SegList, K);
if (S->Load == M) {
/* Load area - mark the segment as dumped */
S->Seg->Dumped = 1;
}
}
}
}
}
}
}
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