/*****************************************************************************/ /* */ /* pseudo.c */ /* */ /* Pseudo instructions for the ca65 macroassembler */ /* */ /* */ /* */ /* (C) 1998-2003 Ullrich von Bassewitz */ /* Römerstraße 52 */ /* D-70794 Filderstadt */ /* 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 #include #include #include #include /* common */ #include "assertdefs.h" #include "bitops.h" #include "cddefs.h" #include "coll.h" #include "symdefs.h" #include "tgttrans.h" #include "xmalloc.h" /* ca65 */ #include "anonname.h" #include "asserts.h" #include "condasm.h" #include "dbginfo.h" #include "enum.h" #include "error.h" #include "expr.h" #include "feature.h" #include "global.h" #include "incpath.h" #include "instr.h" #include "listing.h" #include "macpack.h" #include "macro.h" #include "nexttok.h" #include "objcode.h" #include "options.h" #include "pseudo.h" #include "repeat.h" #include "segment.h" #include "sizeof.h" #include "spool.h" #include "struct.h" #include "symbol.h" #include "symtab.h" /*****************************************************************************/ /* Data */ /*****************************************************************************/ /* Keyword we're about to handle */ static char Keyword [sizeof (SVal)+1]; /* Segment stack */ #define MAX_PUSHED_SEGMENTS 16 static Collection SegStack = STATIC_COLLECTION_INITIALIZER; /*****************************************************************************/ /* Forwards */ /*****************************************************************************/ static void DoUnexpected (void); /* Got an unexpected keyword */ static void DoInvalid (void); /* Handle a token that is invalid here, since it should have been handled on * a much lower level of the expression hierarchy. Getting this sort of token * means that the lower level code has bugs. * This function differs to DoUnexpected in that the latter may be triggered * by the user by using keywords in the wrong location. DoUnexpected is not * an error in the assembler itself, while DoInvalid is. */ /*****************************************************************************/ /* Helper functions */ /*****************************************************************************/ static unsigned char OptionalAddrSize (void) /* If a colon follows, parse an optional address size spec and return it. * Otherwise return ADDR_SIZE_DEFAULT. */ { unsigned AddrSize = ADDR_SIZE_DEFAULT; if (Tok == TOK_COLON) { NextTok (); AddrSize = ParseAddrSize (); NextTok (); } return AddrSize; } static void SetBoolOption (unsigned char* Flag) /* Read a on/off/+/- option and set flag accordingly */ { static const char* Keys[] = { "OFF", "ON", }; if (Tok == TOK_PLUS) { *Flag = 1; NextTok (); } else if (Tok == TOK_MINUS) { *Flag = 0; NextTok (); } else if (Tok == TOK_IDENT) { /* Map the keyword to a number */ switch (GetSubKey (Keys, sizeof (Keys) / sizeof (Keys [0]))) { case 0: *Flag = 0; NextTok (); break; case 1: *Flag = 1; NextTok (); break; default: ErrorSkip ("`on' or `off' expected"); break; } } else if (TokIsSep (Tok)) { /* Without anything assume switch on */ *Flag = 1; } else { ErrorSkip ("`on' or `off' expected"); } } static void ExportImport (void (*Func) (SymEntry*, unsigned char, unsigned), unsigned char DefAddrSize, unsigned Flags) /* Export or import symbols */ { SymEntry* Sym; unsigned char AddrSize; while (1) { /* We need an identifier here */ if (Tok != TOK_IDENT) { ErrorSkip ("Identifier expected"); return; } /* Find the symbol table entry, allocate a new one if necessary */ Sym = SymFind (CurrentScope, SVal, SYM_ALLOC_NEW); /* Skip the name */ NextTok (); /* Get an optional address size */ AddrSize = OptionalAddrSize (); if (AddrSize == ADDR_SIZE_DEFAULT) { AddrSize = DefAddrSize; } /* Call the actual import/export function */ Func (Sym, AddrSize, Flags); /* More symbols? */ if (Tok == TOK_COMMA) { NextTok (); } else { break; } } } static long IntArg (long Min, long Max) /* Read an integer argument and check a range. Accept the token "unlimited" * and return -1 in this case. */ { if (Tok == TOK_IDENT && strcmp (SVal, "unlimited") == 0) { NextTok (); return -1; } else { long Val = ConstExpression (); if (Val < Min || Val > Max) { Error ("Range error"); Val = Min; } return Val; } } static void ConDes (const char* Name, unsigned Type) /* Parse remaining line for constructor/destructor of the remaining type */ { long Prio; /* Find the symbol table entry, allocate a new one if necessary */ SymEntry* Sym = SymFind (CurrentScope, Name, SYM_ALLOC_NEW); /* Optional constructor priority */ if (Tok == TOK_COMMA) { /* Priority value follows */ NextTok (); Prio = ConstExpression (); if (Prio < CD_PRIO_MIN || Prio > CD_PRIO_MAX) { /* Value out of range */ Error ("Range error"); return; } } else { /* Use the default priority value */ Prio = CD_PRIO_DEF; } /* Define the symbol */ SymConDes (Sym, ADDR_SIZE_DEFAULT, Type, (unsigned) Prio); } /*****************************************************************************/ /* Handler functions */ /*****************************************************************************/ static void DoA16 (void) /* Switch the accu to 16 bit mode (assembler only) */ { if (GetCPU() != CPU_65816) { Error ("Command is only valid in 65816 mode"); } else { /* Immidiate mode has two extension bytes */ ExtBytes [AMI_IMM_ACCU] = 2; } } static void DoA8 (void) /* Switch the accu to 8 bit mode (assembler only) */ { if (GetCPU() != CPU_65816) { Error ("Command is only valid in 65816 mode"); } else { /* Immidiate mode has one extension byte */ ExtBytes [AMI_IMM_ACCU] = 1; } } static void DoAddr (void) /* Define addresses */ { while (1) { if (GetCPU() == CPU_65816) { EmitWord (GenWordExpr (Expression ())); } else { /* Do a range check */ EmitWord (Expression ()); } if (Tok != TOK_COMMA) { break; } else { NextTok (); } } } static void DoAlign (void) /* Align the PC to some boundary */ { long Val; long Align; unsigned Bit; /* Read the alignment value */ Align = ConstExpression (); if (Align <= 0 || Align > 0x10000) { ErrorSkip ("Range error"); return; } /* Optional value follows */ if (Tok == TOK_COMMA) { NextTok (); Val = ConstExpression (); /* We need a byte value here */ if (!IsByteRange (Val)) { ErrorSkip ("Range error"); return; } } else { Val = -1; } /* Check if the alignment is a power of two */ Bit = BitFind (Align); if (Align != (0x01L << Bit)) { Error ("Alignment value must be a power of 2"); } else { SegAlign (Bit, (int) Val); } } static void DoASCIIZ (void) /* Define text with a zero terminator */ { unsigned Len; while (1) { /* Must have a string constant */ if (Tok != TOK_STRCON) { ErrorSkip ("String constant expected"); return; } /* Get the length of the string constant */ Len = strlen (SVal); /* Translate into target charset and emit */ TgtTranslateBuf (SVal, Len); EmitData ((unsigned char*) SVal, Len); NextTok (); if (Tok == TOK_COMMA) { NextTok (); } else { break; } } Emit0 (0); } static void DoAssert (void) /* Add an assertion */ { static const char* ActionTab [] = { "WARN", "WARNING", "ERROR" }; int Action; /* First we have the expression that has to evaluated */ ExprNode* Expr = Expression (); ConsumeComma (); /* Action follows */ if (Tok != TOK_IDENT) { ErrorSkip ("Identifier expected"); return; } Action = GetSubKey (ActionTab, sizeof (ActionTab) / sizeof (ActionTab[0])); switch (Action) { case 0: case 1: /* Warning */ Action = ASSERT_ACT_WARN; break; case 2: /* Error */ Action = ASSERT_ACT_ERROR; break; default: Error ("Illegal assert action specifier"); } NextTok (); ConsumeComma (); /* Read the message */ if (Tok != TOK_STRCON) { ErrorSkip ("String constant expected"); } else { AddAssertion (Expr, Action, GetStringId (SVal)); NextTok (); } } static void DoAutoImport (void) /* Mark unresolved symbols as imported */ { SetBoolOption (&AutoImport); } static void DoBss (void) /* Switch to the BSS segment */ { UseSeg (&BssSegDef); } static void DoByte (void) /* Define bytes */ { while (1) { if (Tok == TOK_STRCON) { /* A string, translate into target charset and emit */ unsigned Len = strlen (SVal); TgtTranslateBuf (SVal, Len); EmitData ((unsigned char*) SVal, Len); NextTok (); } else { EmitByte (Expression ()); } if (Tok != TOK_COMMA) { break; } else { NextTok (); /* Do smart handling of dangling comma */ if (Tok == TOK_SEP) { Error ("Unexpected end of line"); break; } } } } static void DoCase (void) /* Switch the IgnoreCase option */ { SetBoolOption (&IgnoreCase); IgnoreCase = !IgnoreCase; } static void DoCharMap (void) /* Allow custome character mappings */ { long Index; long Code; /* Read the index as numerical value */ Index = ConstExpression (); if (Index < 1 || Index > 255) { /* Value out of range */ ErrorSkip ("Range error"); return; } /* Comma follows */ ConsumeComma (); /* Read the character code */ Code = ConstExpression (); if (Code < 1 || Code > 255) { /* Value out of range */ ErrorSkip ("Range error"); return; } /* Set the character translation */ TgtTranslateSet ((unsigned) Index, (unsigned char) Code); } static void DoCode (void) /* Switch to the code segment */ { UseSeg (&CodeSegDef); } static void DoConDes (void) /* Export a symbol as constructor/destructor */ { static const char* Keys[] = { "CONSTRUCTOR", "DESTRUCTOR", }; char Name [sizeof (SVal)]; long Type; /* Symbol name follows */ if (Tok != TOK_IDENT) { ErrorSkip ("Identifier expected"); return; } strcpy (Name, SVal); NextTok (); /* Type follows. May be encoded as identifier or numerical */ ConsumeComma (); if (Tok == TOK_IDENT) { /* Map the following keyword to a number, then skip it */ Type = GetSubKey (Keys, sizeof (Keys) / sizeof (Keys [0])); NextTok (); /* Check if we got a valid keyword */ if (Type < 0) { Error ("Syntax error"); SkipUntilSep (); return; } } else { /* Read the type as numerical value */ Type = ConstExpression (); if (Type < CD_TYPE_MIN || Type > CD_TYPE_MAX) { /* Value out of range */ Error ("Range error"); return; } } /* Parse the remainder of the line and export the symbol */ ConDes (Name, (unsigned) Type); } static void DoConstructor (void) /* Export a symbol as constructor */ { char Name [sizeof (SVal)]; /* Symbol name follows */ if (Tok != TOK_IDENT) { ErrorSkip ("Identifier expected"); return; } strcpy (Name, SVal); NextTok (); /* Parse the remainder of the line and export the symbol */ ConDes (Name, CD_TYPE_CON); } static void DoData (void) /* Switch to the data segment */ { UseSeg (&DataSegDef); } static void DoDbg (void) /* Add debug information from high level code */ { static const char* Keys[] = { "FILE", "LINE", "SYM", }; int Key; /* We expect a subkey */ if (Tok != TOK_IDENT) { ErrorSkip ("Identifier expected"); return; } /* Map the following keyword to a number */ Key = GetSubKey (Keys, sizeof (Keys) / sizeof (Keys [0])); /* Skip the subkey */ NextTok (); /* Check the key and dispatch to a handler */ switch (Key) { case 0: DbgInfoFile (); break; case 1: DbgInfoLine (); break; case 2: DbgInfoSym (); break; default: ErrorSkip ("Syntax error"); break; } } static void DoDByt (void) /* Output double bytes */ { while (1) { EmitWord (GenSwapExpr (Expression ())); if (Tok != TOK_COMMA) { break; } else { NextTok (); } } } static void DoDebugInfo (void) /* Switch debug info on or off */ { SetBoolOption (&DbgSyms); } static void DoDefine (void) /* Define a one line macro */ { MacDef (MAC_STYLE_DEFINE); } static void DoDestructor (void) /* Export a symbol as destructor */ { char Name [sizeof (SVal)]; /* Symbol name follows */ if (Tok != TOK_IDENT) { ErrorSkip ("Identifier expected"); return; } strcpy (Name, SVal); NextTok (); /* Parse the remainder of the line and export the symbol */ ConDes (Name, CD_TYPE_DES); } static void DoDWord (void) /* Define dwords */ { while (1) { EmitDWord (Expression ()); if (Tok != TOK_COMMA) { break; } else { NextTok (); } } } static void DoEnd (void) /* End of assembly */ { ForcedEnd = 1; NextTok (); } static void DoEndProc (void) /* Leave a lexical level */ { if (GetCurrentSymTabType () != ST_PROC) { /* No local scope */ ErrorSkip ("No open .PROC"); } else { SymLeaveLevel (); } } static void DoEndScope (void) /* Leave a lexical level */ { if ( GetCurrentSymTabType () != ST_SCOPE) { /* No local scope */ ErrorSkip ("No open .SCOPE"); } else { SymLeaveLevel (); } } static void DoError (void) /* User error */ { if (Tok != TOK_STRCON) { ErrorSkip ("String constant expected"); } else { Error ("User error: %s", SVal); SkipUntilSep (); } } static void DoExitMacro (void) /* Exit a macro expansion */ { if (!InMacExpansion ()) { /* We aren't expanding a macro currently */ DoUnexpected (); } else { MacAbort (); } } static void DoExport (void) /* Export a symbol */ { ExportImport (SymExport, ADDR_SIZE_DEFAULT, SF_NONE); } static void DoExportZP (void) /* Export a zeropage symbol */ { ExportImport (SymExport, ADDR_SIZE_ZP, SF_NONE); } static void DoFarAddr (void) /* Define far addresses (24 bit) */ { while (1) { EmitFarAddr (Expression ()); if (Tok != TOK_COMMA) { break; } else { NextTok (); } } } static void DoFeature (void) /* Switch the Feature option */ { /* Allow a list of comma separated keywords */ while (1) { /* We expect an identifier */ if (Tok != TOK_IDENT) { ErrorSkip ("Identifier expected"); return; } /* Make the string attribute lower case */ LocaseSVal (); /* Set the feature and check for errors */ if (SetFeature (SVal) == FEAT_UNKNOWN) { /* Not found */ ErrorSkip ("Invalid feature: `%s'", SVal); return; } else { /* Skip the keyword */ NextTok (); } /* Allow more than one keyword */ if (Tok == TOK_COMMA) { NextTok (); } else { break; } } } static void DoFileOpt (void) /* Insert a file option */ { long OptNum; /* The option type may be given as a keyword or as a number. */ if (Tok == TOK_IDENT) { /* Option given as keyword */ static const char* Keys [] = { "AUTHOR", "COMMENT", "COMPILER" }; /* Map the option to a number */ OptNum = GetSubKey (Keys, sizeof (Keys) / sizeof (Keys [0])); if (OptNum < 0) { /* Not found */ ErrorSkip ("File option keyword expected"); return; } /* Skip the keyword */ NextTok (); /* Must be followed by a comma */ ConsumeComma (); /* We accept only string options for now */ if (Tok != TOK_STRCON) { ErrorSkip ("String constant expected"); return; } /* Insert the option */ switch (OptNum) { case 0: /* Author */ OptAuthor (SVal); break; case 1: /* Comment */ OptComment (SVal); break; case 2: /* Compiler */ OptCompiler (SVal); break; default: Internal ("Invalid OptNum: %ld", OptNum); } /* Done */ NextTok (); } else { /* Option given as number */ OptNum = ConstExpression (); if (!IsByteRange (OptNum)) { ErrorSkip ("Range error"); return; } /* Must be followed by a comma */ ConsumeComma (); /* We accept only string options for now */ if (Tok != TOK_STRCON) { ErrorSkip ("String constant expected"); return; } /* Insert the option */ OptStr ((unsigned char) OptNum, SVal); /* Done */ NextTok (); } } static void DoForceImport (void) /* Do a forced import on a symbol */ { ExportImport (SymImport, ADDR_SIZE_DEFAULT, SF_FORCED); } static void DoGlobal (void) /* Declare a global symbol */ { ExportImport (SymGlobal, ADDR_SIZE_DEFAULT, SF_NONE); } static void DoGlobalZP (void) /* Declare a global zeropage symbol */ { ExportImport (SymGlobal, ADDR_SIZE_ZP, SF_NONE); } static void DoI16 (void) /* Switch the index registers to 16 bit mode (assembler only) */ { if (GetCPU() != CPU_65816) { Error ("Command is only valid in 65816 mode"); } else { /* Immidiate mode has two extension bytes */ ExtBytes [AMI_IMM_INDEX] = 2; } } static void DoI8 (void) /* Switch the index registers to 16 bit mode (assembler only) */ { if (GetCPU() != CPU_65816) { Error ("Command is only valid in 65816 mode"); } else { /* Immidiate mode has one extension byte */ ExtBytes [AMI_IMM_INDEX] = 1; } } static void DoImport (void) /* Import a symbol */ { ExportImport (SymImport, ADDR_SIZE_DEFAULT, SF_NONE); } static void DoImportZP (void) /* Import a zero page symbol */ { ExportImport (SymImport, ADDR_SIZE_ZP, SF_NONE); } static void DoIncBin (void) /* Include a binary file */ { char Name [sizeof (SVal)]; long Start = 0L; long Count = -1L; long Size; FILE* F; /* Name must follow */ if (Tok != TOK_STRCON) { ErrorSkip ("String constant expected"); return; } strcpy (Name, SVal); NextTok (); /* A starting offset may follow */ if (Tok == TOK_COMMA) { NextTok (); Start = ConstExpression (); /* And a length may follow */ if (Tok == TOK_COMMA) { NextTok (); Count = ConstExpression (); } } /* Try to open the file */ F = fopen (Name, "rb"); if (F == 0) { /* Search for the file in the include directories. */ char* PathName = FindInclude (Name); if (PathName == 0 || (F = fopen (PathName, "r")) == 0) { /* Not found or cannot open, print an error and bail out */ ErrorSkip ("Cannot open include file `%s': %s", Name, strerror (errno)); } /* Free the allocated memory */ xfree (PathName); /* If we had an error before, bail out now */ if (F == 0) { return; } } /* Get the size of the file */ fseek (F, 0, SEEK_END); Size = ftell (F); /* If a count was not given, calculate it now */ if (Count < 0) { Count = Size - Start; if (Count < 0) { /* Nothing to read - flag this as a range error */ ErrorSkip ("Range error"); goto Done; } } else { /* Count was given, check if it is valid */ if (Start + Count > Size) { ErrorSkip ("Range error"); goto Done; } } /* Seek to the start position */ fseek (F, Start, SEEK_SET); /* Read chunks and insert them into the output */ while (Count > 0) { unsigned char Buf [1024]; /* Calculate the number of bytes to read */ size_t BytesToRead = (Count > (long)sizeof(Buf))? sizeof(Buf) : (size_t) Count; /* Read chunk */ size_t BytesRead = fread (Buf, 1, BytesToRead, F); if (BytesToRead != BytesRead) { /* Some sort of error */ ErrorSkip ("Cannot read from include file `%s': %s", Name, strerror (errno)); break; } /* Insert it into the output */ EmitData (Buf, BytesRead); /* Keep the counters current */ Count -= BytesRead; } Done: /* Close the file, ignore errors since it's r/o */ (void) fclose (F); } static void DoInclude (void) /* Include another file */ { char Name [MAX_STR_LEN+1]; /* Name must follow */ if (Tok != TOK_STRCON) { ErrorSkip ("String constant expected"); } else { strcpy (Name, SVal); NextTok (); NewInputFile (Name); } } static void DoInvalid (void) /* Handle a token that is invalid here, since it should have been handled on * a much lower level of the expression hierarchy. Getting this sort of token * means that the lower level code has bugs. * This function differs to DoUnexpected in that the latter may be triggered * by the user by using keywords in the wrong location. DoUnexpected is not * an error in the assembler itself, while DoInvalid is. */ { Internal ("Unexpected token: %s", Keyword); } static void DoLineCont (void) /* Switch the use of line continuations */ { SetBoolOption (&LineCont); } static void DoList (void) /* Enable/disable the listing */ { /* Get the setting */ unsigned char List; SetBoolOption (&List); /* Manage the counter */ if (List) { EnableListing (); } else { DisableListing (); } } static void DoListBytes (void) /* Set maximum number of bytes to list for one line */ { SetListBytes (IntArg (MIN_LIST_BYTES, MAX_LIST_BYTES)); } static void DoLocalChar (void) /* Define the character that starts local labels */ { if (Tok != TOK_CHARCON) { ErrorSkip ("Character constant expected"); } else { if (IVal != '@' && IVal != '?') { Error ("Invalid start character for locals"); } else { LocalStart = (char) IVal; } NextTok (); } } static void DoMacPack (void) /* Insert a macro package */ { /* Macro package names */ static const char* Keys [] = { "GENERIC", "LONGBRANCH", "CBM", "CPU" }; int Package; /* We expect an identifier */ if (Tok != TOK_IDENT) { ErrorSkip ("Identifier expected"); return; } /* Map the keyword to a number */ Package = GetSubKey (Keys, sizeof (Keys) / sizeof (Keys [0])); if (Package < 0) { /* Not found */ ErrorSkip ("Invalid macro package"); return; } /* Skip the package name */ NextTok (); /* Insert the package */ InsertMacPack (Package); } static void DoMacro (void) /* Start a macro definition */ { MacDef (MAC_STYLE_CLASSIC); } static void DoNull (void) /* Switch to the NULL segment */ { UseSeg (&NullSegDef); } static void DoOrg (void) /* Start absolute code */ { long PC = ConstExpression (); if (PC < 0 || PC > 0xFFFFFF) { Error ("Range error"); return; } SetAbsPC (PC); } static void DoOut (void) /* Output a string */ { if (Tok != TOK_STRCON) { ErrorSkip ("String constant expected"); } else { /* Output the string and be sure to flush the output to keep it in * sync with any error messages if the output is redirected to a file. */ printf ("%s\n", SVal); fflush (stdout); NextTok (); } } static void DoP02 (void) /* Switch to 6502 CPU */ { SetCPU (CPU_6502); } static void DoPC02 (void) /* Switch to 65C02 CPU */ { SetCPU (CPU_65C02); } static void DoP816 (void) /* Switch to 65816 CPU */ { SetCPU (CPU_65816); } static void DoPageLength (void) /* Set the page length for the listing */ { PageLength = IntArg (MIN_PAGE_LEN, MAX_PAGE_LEN); } static void DoPopSeg (void) /* Pop an old segment from the segment stack */ { SegDef* Def; /* Must have a segment on the stack */ if (CollCount (&SegStack) == 0) { ErrorSkip ("Segment stack is empty"); return; } /* Pop the last element */ Def = CollPop (&SegStack); /* Restore this segment */ UseSeg (Def); /* Delete the segment definition */ FreeSegDef (Def); } static void DoProc (void) /* Start a new lexical scope */ { char Name[sizeof(SVal)]; unsigned char AddrSize; if (Tok == TOK_IDENT) { /* The new scope has a name. Remember it. */ strcpy (Name, SVal); /* Search for the symbol, generate a new one if needed */ SymEntry* Sym = SymFind (CurrentScope, Name, SYM_ALLOC_NEW); /* Skip the scope name */ NextTok (); /* Read an optional address size specifier */ AddrSize = OptionalAddrSize (); /* Mark the symbol as defined */ SymDef (Sym, GenCurrentPC (), AddrSize, SF_LABEL); } else { /* A .PROC statement without a name */ Warning (1, "Unnamed .PROCs are deprecated, please use .SCOPE"); AnonName (Name, sizeof (Name), "PROC"); AddrSize = ADDR_SIZE_DEFAULT; } /* Enter a new scope */ SymEnterLevel (Name, ST_PROC, AddrSize); } static void DoPSC02 (void) /* Switch to 65SC02 CPU */ { SetCPU (CPU_65SC02); } static void DoPushSeg (void) /* Push the current segment onto the segment stack */ { /* Can only push a limited size of segments */ if (CollCount (&SegStack) >= MAX_PUSHED_SEGMENTS) { ErrorSkip ("Segment stack overflow"); return; } /* Get the current segment and push it */ CollAppend (&SegStack, DupSegDef (GetCurrentSegDef ())); } static void DoReloc (void) /* Enter relocatable mode */ { RelocMode = 1; } static void DoRepeat (void) /* Repeat some instruction block */ { ParseRepeat (); } static void DoRes (void) /* Reserve some number of storage bytes */ { long Count; long Val; Count = ConstExpression (); if (Count > 0xFFFF || Count < 0) { ErrorSkip ("Range error"); return; } if (Tok == TOK_COMMA) { NextTok (); Val = ConstExpression (); /* We need a byte value here */ if (!IsByteRange (Val)) { ErrorSkip ("Range error"); return; } /* Emit constant values */ while (Count--) { Emit0 ((unsigned char) Val); } } else { /* Emit fill fragments */ EmitFill (Count); } } static void DoROData (void) /* Switch to the r/o data segment */ { UseSeg (&RODataSegDef); } static void DoScope (void) /* Start a local scope */ { char Name[sizeof (SVal)]; unsigned char AddrSize; if (Tok == TOK_IDENT) { /* The new scope has a name. Remember and skip it. */ strcpy (Name, SVal); NextTok (); } else { /* An unnamed scope */ AnonName (Name, sizeof (Name), "SCOPE"); } /* Read an optional address size specifier */ AddrSize = OptionalAddrSize (); /* Enter the new scope */ SymEnterLevel (Name, ST_SCOPE, AddrSize); } static void DoSegment (void) /* Switch to another segment */ { char Name [sizeof (SVal)]; SegDef Def; Def.Name = Name; if (Tok != TOK_STRCON) { ErrorSkip ("String constant expected"); } else { /* Save the name of the segment and skip it */ strcpy (Name, SVal); NextTok (); /* Check for an optional address size modifier */ Def.AddrSize = OptionalAddrSize (); /* Set the segment */ UseSeg (&Def); } } static void DoSetCPU (void) /* Switch the CPU instruction set */ { /* We expect an identifier */ if (Tok != TOK_STRCON) { ErrorSkip ("String constant expected"); } else { /* Try to find the CPU, then skip the identifier */ cpu_t CPU = FindCPU (SVal); NextTok (); /* Switch to the new CPU */ SetCPU (CPU); } } static void DoSmart (void) /* Smart mode on/off */ { SetBoolOption (&SmartMode); } static void DoSunPlus (void) /* Switch to the SUNPLUS CPU */ { SetCPU (CPU_SUNPLUS); } static void DoTag (void) /* Allocate space for a struct */ { SymEntry* SizeSym; long Size; /* Read the struct name */ SymTable* Struct = ParseScopedSymTable (); /* Check the supposed struct */ if (Struct == 0) { ErrorSkip ("Unknown struct"); return; } if (GetSymTabType (Struct) != ST_STRUCT) { ErrorSkip ("Not a struct"); return; } /* Get the symbol that defines the size of the struct */ SizeSym = GetSizeOfScope (Struct); /* Check if it does exist and if its value is known */ if (SizeSym == 0 || !SymIsConst (SizeSym, &Size)) { ErrorSkip ("Size of struct/union is unknown"); return; } /* Optional multiplicator may follow */ if (Tok == TOK_COMMA) { long Multiplicator; NextTok (); Multiplicator = ConstExpression (); /* Multiplicator must make sense */ if (Multiplicator <= 0) { ErrorSkip ("Range error"); return; } Size *= Multiplicator; } /* Emit fill fragments */ EmitFill (Size); } static void DoUnexpected (void) /* Got an unexpected keyword */ { Error ("Unexpected `%s'", Keyword); SkipUntilSep (); } static void DoWarning (void) /* User warning */ { if (Tok != TOK_STRCON) { ErrorSkip ("String constant expected"); } else { Warning (0, "User warning: %s", SVal); SkipUntilSep (); } } static void DoWord (void) /* Define words */ { while (1) { EmitWord (Expression ()); if (Tok != TOK_COMMA) { break; } else { NextTok (); } } } static void DoZeropage (void) /* Switch to the zeropage segment */ { UseSeg (&ZeropageSegDef); } /*****************************************************************************/ /* Table data */ /*****************************************************************************/ /* Control commands flags */ enum { ccNone = 0x0000, /* No special flags */ ccKeepToken = 0x0001 /* Do not skip the current token */ }; /* Control command table */ typedef struct CtrlDesc CtrlDesc; struct CtrlDesc { unsigned Flags; /* Flags for this directive */ void (*Handler) (void); /* Command handler */ }; #define PSEUDO_COUNT (sizeof (CtrlCmdTab) / sizeof (CtrlCmdTab [0])) static CtrlDesc CtrlCmdTab [] = { { ccNone, DoA16 }, { ccNone, DoA8 }, { ccNone, DoAddr }, /* .ADDR */ { ccNone, DoAlign }, { ccNone, DoASCIIZ }, { ccNone, DoAssert }, { ccNone, DoAutoImport }, { ccNone, DoUnexpected }, /* .BANKBYTE */ { ccNone, DoUnexpected }, /* .BLANK */ { ccNone, DoBss }, { ccNone, DoByte }, { ccNone, DoCase }, { ccNone, DoCharMap }, { ccNone, DoCode }, { ccNone, DoUnexpected, }, /* .CONCAT */ { ccNone, DoConDes }, { ccNone, DoUnexpected }, /* .CONST */ { ccNone, DoConstructor }, { ccNone, DoUnexpected }, /* .CPU */ { ccNone, DoData }, { ccNone, DoDbg, }, { ccNone, DoDByt }, { ccNone, DoDebugInfo }, { ccNone, DoDefine }, { ccNone, DoUnexpected }, /* .DEFINED */ { ccNone, DoDestructor }, { ccNone, DoDWord }, { ccKeepToken, DoConditionals }, /* .ELSE */ { ccKeepToken, DoConditionals }, /* .ELSEIF */ { ccKeepToken, DoEnd }, { ccNone, DoUnexpected }, /* .ENDENUM */ { ccKeepToken, DoConditionals }, /* .ENDIF */ { ccNone, DoUnexpected }, /* .ENDMACRO */ { ccNone, DoEndProc }, { ccNone, DoUnexpected }, /* .ENDREPEAT */ { ccNone, DoEndScope }, { ccNone, DoUnexpected }, /* .ENDSTRUCT */ { ccNone, DoUnexpected }, /* .ENDUNION */ { ccNone, DoEnum }, { ccNone, DoError }, { ccNone, DoExitMacro }, { ccNone, DoExport }, { ccNone, DoExportZP }, { ccNone, DoFarAddr }, { ccNone, DoFeature }, { ccNone, DoFileOpt }, { ccNone, DoForceImport }, { ccNone, DoUnexpected }, /* .FORCEWORD */ { ccNone, DoGlobal }, { ccNone, DoGlobalZP }, { ccNone, DoUnexpected }, /* .HIBYTE */ { ccNone, DoUnexpected }, /* .HIWORD */ { ccNone, DoI16 }, { ccNone, DoI8 }, { ccKeepToken, DoConditionals }, /* .IF */ { ccKeepToken, DoConditionals }, /* .IFBLANK */ { ccKeepToken, DoConditionals }, /* .IFCONST */ { ccKeepToken, DoConditionals }, /* .IFDEF */ { ccKeepToken, DoConditionals }, /* .IFNBLANK */ { ccKeepToken, DoConditionals }, /* .IFNCONST */ { ccKeepToken, DoConditionals }, /* .IFNDEF */ { ccKeepToken, DoConditionals }, /* .IFNREF */ { ccKeepToken, DoConditionals }, /* .IFP02 */ { ccKeepToken, DoConditionals }, /* .IFP816 */ { ccKeepToken, DoConditionals }, /* .IFPC02 */ { ccKeepToken, DoConditionals }, /* .IFPSC02 */ { ccKeepToken, DoConditionals }, /* .IFREF */ { ccNone, DoImport }, { ccNone, DoImportZP }, { ccNone, DoIncBin }, { ccNone, DoInclude }, { ccNone, DoInvalid }, /* .LEFT */ { ccNone, DoLineCont }, { ccNone, DoList }, { ccNone, DoListBytes }, { ccNone, DoUnexpected }, /* .LOBYTE */ { ccNone, DoUnexpected }, /* .LOCAL */ { ccNone, DoLocalChar }, { ccNone, DoUnexpected }, /* .LOWORD */ { ccNone, DoMacPack }, { ccNone, DoMacro }, { ccNone, DoUnexpected }, /* .MATCH */ { ccNone, DoInvalid }, /* .MID */ { ccNone, DoNull }, { ccNone, DoOrg }, { ccNone, DoOut }, { ccNone, DoP02 }, { ccNone, DoP816 }, { ccNone, DoPageLength }, { ccNone, DoUnexpected }, /* .PARAMCOUNT */ { ccNone, DoPC02 }, { ccNone, DoPopSeg }, { ccNone, DoProc }, { ccNone, DoPSC02 }, { ccNone, DoPushSeg }, { ccNone, DoUnexpected }, /* .REFERENCED */ { ccNone, DoReloc }, { ccNone, DoRepeat }, { ccNone, DoRes }, { ccNone, DoInvalid }, /* .RIGHT */ { ccNone, DoROData }, { ccNone, DoScope }, { ccNone, DoSegment }, { ccNone, DoSetCPU }, { ccNone, DoUnexpected }, /* .SIZEOF */ { ccNone, DoSmart }, { ccNone, DoUnexpected }, /* .STRAT */ { ccNone, DoUnexpected }, /* .STRING */ { ccNone, DoUnexpected }, /* .STRLEN */ { ccNone, DoStruct }, { ccNone, DoSunPlus }, { ccNone, DoTag }, { ccNone, DoUnexpected }, /* .TCOUNT */ { ccNone, DoUnexpected }, /* .TIME */ { ccNone, DoUnion }, { ccNone, DoUnexpected }, /* .VERSION */ { ccNone, DoWarning }, { ccNone, DoWord }, { ccNone, DoUnexpected }, /* .XMATCH */ { ccNone, DoZeropage }, }; /*****************************************************************************/ /* Code */ /*****************************************************************************/ void HandlePseudo (void) /* Handle a pseudo instruction */ { CtrlDesc* D; /* Calculate the index into the table */ unsigned Index = Tok - TOK_FIRSTPSEUDO; /* Safety check */ if (PSEUDO_COUNT != (TOK_LASTPSEUDO - TOK_FIRSTPSEUDO + 1)) { Internal ("Pseudo mismatch: PSEUDO_COUNT = %u, actual count = %u\n", PSEUDO_COUNT, TOK_LASTPSEUDO - TOK_FIRSTPSEUDO + 1); } CHECK (Index < PSEUDO_COUNT); /* Get the pseudo intruction descriptor */ D = &CtrlCmdTab [Index]; /* Remember the instruction, then skip it if needed */ if ((D->Flags & ccKeepToken) == 0) { strcpy (Keyword, SVal); NextTok (); } /* Call the handler */ D->Handler (); } void SegStackCheck (void) /* Check if the segment stack is empty at end of assembly */ { if (CollCount (&SegStack) != 0) { Error ("Segment stack is not empty"); } }