/* =========================================================================== Copyright (C) 1999-2005 Id Software, Inc. Copyright (C) 2000-2013 Darklegion Development This file is part of Tremulous. Tremulous is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. Tremulous is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Tremulous; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA =========================================================================== */ #include "../../qcommon/q_platform.h" #include "cmdlib.h" #include "mathlib.h" #include "../../qcommon/qfiles.h" /* 19079 total symbols in FI, 2002 Jan 23 */ #define DEFAULT_HASHTABLE_SIZE 2048 char outputFilename[MAX_OS_PATH]; // the zero page size is just used for detecting run time faults #define ZERO_PAGE_SIZE 0 // 256 typedef enum { OP_UNDEF, OP_IGNORE, OP_BREAK, OP_ENTER, OP_LEAVE, OP_CALL, OP_PUSH, OP_POP, OP_CONST, OP_LOCAL, OP_JUMP, //------------------- OP_EQ, OP_NE, OP_LTI, OP_LEI, OP_GTI, OP_GEI, OP_LTU, OP_LEU, OP_GTU, OP_GEU, OP_EQF, OP_NEF, OP_LTF, OP_LEF, OP_GTF, OP_GEF, //------------------- OP_LOAD1, OP_LOAD2, OP_LOAD4, OP_STORE1, OP_STORE2, OP_STORE4, // *(stack[top-1]) = stack[yop OP_ARG, OP_BLOCK_COPY, //------------------- OP_SEX8, OP_SEX16, OP_NEGI, OP_ADD, OP_SUB, OP_DIVI, OP_DIVU, OP_MODI, OP_MODU, OP_MULI, OP_MULU, OP_BAND, OP_BOR, OP_BXOR, OP_BCOM, OP_LSH, OP_RSHI, OP_RSHU, OP_NEGF, OP_ADDF, OP_SUBF, OP_DIVF, OP_MULF, OP_CVIF, OP_CVFI } opcode_t; typedef struct { int imageBytes; // after decompression int entryPoint; int stackBase; int stackSize; } executableHeader_t; typedef enum { CODESEG, DATASEG, // initialized 32 bit data, will be byte swapped LITSEG, // strings BSSSEG, // 0 filled JTRGSEG, // pseudo-segment that contains only jump table targets NUM_SEGMENTS } segmentName_t; #define MAX_IMAGE 0x400000 typedef struct { byte image[MAX_IMAGE]; int imageUsed; int segmentBase; // only valid on second pass } segment_t; typedef struct symbol_s { struct symbol_s *next; int hash; segment_t *segment; char *name; int value; } symbol_t; typedef struct hashchain_s { void *data; struct hashchain_s *next; } hashchain_t; typedef struct hashtable_s { int buckets; hashchain_t **table; } hashtable_t; int symtablelen = DEFAULT_HASHTABLE_SIZE; hashtable_t *symtable; hashtable_t *optable; segment_t segment[NUM_SEGMENTS]; segment_t *currentSegment; int passNumber; int numSymbols; int errorCount; typedef struct options_s { qboolean verbose; qboolean writeMapFile; qboolean vanillaQ3Compatibility; } options_t; options_t options = { 0 }; symbol_t *symbols; symbol_t *lastSymbol = 0; /* Most recent symbol defined. */ #define MAX_ASM_FILES 256 int numAsmFiles; char *asmFiles[MAX_ASM_FILES]; char *asmFileNames[MAX_ASM_FILES]; int currentFileIndex; char *currentFileName; int currentFileLine; //int stackSize = 16384; int stackSize = 0x10000; // we need to convert arg and ret instructions to // stores to the local stack frame, so we need to track the // characteristics of the current functions stack frame int currentLocals; // bytes of locals needed by this function int currentArgs; // bytes of largest argument list called from this function int currentArgOffset; // byte offset in currentArgs to store next arg, reset each call #define MAX_LINE_LENGTH 1024 char lineBuffer[MAX_LINE_LENGTH]; int lineParseOffset; char token[MAX_LINE_LENGTH]; int instructionCount; typedef struct { char *name; int opcode; } sourceOps_t; sourceOps_t sourceOps[] = { #include "opstrings.h" }; #define NUM_SOURCE_OPS ( sizeof( sourceOps ) / sizeof( sourceOps[0] ) ) int opcodesHash[ NUM_SOURCE_OPS ]; static int vreport (const char* fmt, va_list vp) { if (options.verbose != qtrue) return 0; return vprintf(fmt, vp); } static int report (const char *fmt, ...) { va_list va; int retval; va_start(va, fmt); retval = vreport(fmt, va); va_end(va); return retval; } /* The chain-and-bucket hash table. -PH */ static void hashtable_init (hashtable_t *H, int buckets) { H->buckets = buckets; H->table = calloc(H->buckets, sizeof(*(H->table))); } static hashtable_t *hashtable_new (int buckets) { hashtable_t *H; H = malloc(sizeof(hashtable_t)); hashtable_init(H, buckets); return H; } /* No destroy/destructor. No need. */ static void hashtable_add (hashtable_t *H, int hashvalue, void *datum) { hashchain_t *hc, **hb; hashvalue = (abs(hashvalue) % H->buckets); hb = &(H->table[hashvalue]); if (*hb == 0) { /* Empty bucket. Create new one. */ *hb = calloc(1, sizeof(**hb)); hc = *hb; } else { /* Get hc to point to last node in chain. */ for (hc = *hb; hc && hc->next; hc = hc->next); hc->next = calloc(1, sizeof(*hc)); hc = hc->next; } hc->data = datum; hc->next = 0; } static hashchain_t *hashtable_get (hashtable_t *H, int hashvalue) { hashvalue = (abs(hashvalue) % H->buckets); return (H->table[hashvalue]); } static void hashtable_stats (hashtable_t *H) { int len, empties, longest, nodes; int i; float meanlen; hashchain_t *hc; report("Stats for hashtable %08X", H); empties = 0; longest = 0; nodes = 0; for (i = 0; i < H->buckets; i++) { if (H->table[i] == 0) { empties++; continue; } for (hc = H->table[i], len = 0; hc; hc = hc->next, len++); if (len > longest) { longest = len; } nodes += len; } meanlen = (float)(nodes) / (H->buckets - empties); #if 0 /* Long stats display */ report(" Total buckets: %d\n", H->buckets); report(" Total stored nodes: %d\n", nodes); report(" Longest chain: %d\n", longest); report(" Empty chains: %d\n", empties); report(" Mean non-empty chain length: %f\n", meanlen); #else //0 /* Short stats display */ report(", %d buckets, %d nodes", H->buckets, nodes); report("\n"); report(" Longest chain: %d, empty chains: %d, mean non-empty: %f", longest, empties, meanlen); #endif //0 report("\n"); } /* Kludge. */ /* Check if symbol already exists. */ /* Returns 0 if symbol does NOT already exist, non-zero otherwise. */ static int hashtable_symbol_exists (hashtable_t *H, int hash, char *sym) { hashchain_t *hc; symbol_t *s; hash = (abs(hash) % H->buckets); hc = H->table[hash]; if (hc == 0) { /* Empty chain means this symbol has not yet been defined. */ return 0; } for (; hc; hc = hc->next) { s = (symbol_t*)hc->data; // if ((hash == s->hash) && (strcmp(sym, s->name) == 0)) /* We _already_ know the hash is the same. That's why we're probing! */ if (strcmp(sym, s->name) == 0) { /* Symbol collisions -- symbol already exists. */ return 1; } } return 0; /* Can't find collision. */ } /* Comparator function for quicksorting. */ static int symlist_cmp (const void *e1, const void *e2) { const symbol_t *a, *b; a = *(const symbol_t **)e1; b = *(const symbol_t **)e2; //crumb("Symbol comparison (1) %d to (2) %d\n", a->value, b->value); return ( a->value - b->value); } /* Sort the symbols list by using QuickSort (qsort()). This may take a LOT of memory (a few megabytes?), but memory is cheap these days. However, qsort(3) already exists, and I'm really lazy. -PH */ static void sort_symbols () { int i, elems; symbol_t *s; symbol_t **symlist; if(!symbols) return; //crumb("sort_symbols: Constructing symlist array\n"); for (elems = 0, s = symbols; s; s = s->next, elems++) /* nop */ ; symlist = malloc(elems * sizeof(symbol_t*)); for (i = 0, s = symbols; s; s = s->next, i++) { symlist[i] = s; } //crumbf("sort_symbols: Quick-sorting %d symbols\n", elems); qsort(symlist, elems, sizeof(symbol_t*), symlist_cmp); //crumbf("sort_symbols: Reconstructing symbols list\n"); s = symbols = symlist[0]; for (i = 1; i < elems; i++) { s->next = symlist[i]; s = s->next; } lastSymbol = s; s->next = 0; //crumbf("sort_symbols: verifying..."); fflush(stdout); for (i = 0, s = symbols; s; s = s->next, i++) /*nop*/ ; //crumbf(" %d elements\n", i); free(symlist); /* d'oh. no gc. */ } #ifdef _MSC_VER #define INT64 __int64 #define atoi64 _atoi64 #else #define INT64 long long int #define atoi64 atoll #endif /* Problem: BYTE values are specified as signed decimal string. A properly functional atoip() will cap large signed values at 0x7FFFFFFF. Negative word values are often specified as very large decimal values by lcc. Therefore, values that should be between 0x7FFFFFFF and 0xFFFFFFFF come out as 0x7FFFFFFF when using atoi(). Bad. This function is one big evil hack to work around this problem. */ static int atoiNoCap (const char *s) { INT64 l; union { unsigned int u; signed int i; } retval; l = atoi64(s); /* Now smash to signed 32 bits accordingly. */ if (l < 0) { retval.i = (int)l; } else { retval.u = (unsigned int)l; } return retval.i; /* <- union hackage. I feel dirty with this. -PH */ } /* ============= HashString ============= */ /* Default hash function of Kazlib 1.19. */ static unsigned int HashString (const char *key) { static unsigned long randbox[] = { 0x49848f1bU, 0xe6255dbaU, 0x36da5bdcU, 0x47bf94e9U, 0x8cbcce22U, 0x559fc06aU, 0xd268f536U, 0xe10af79aU, 0xc1af4d69U, 0x1d2917b5U, 0xec4c304dU, 0x9ee5016cU, 0x69232f74U, 0xfead7bb3U, 0xe9089ab6U, 0xf012f6aeU, }; const char *str = key; unsigned int acc = 0; while (*str) { acc ^= randbox[(*str + acc) & 0xf]; acc = (acc << 1) | (acc >> 31); acc &= 0xffffffffU; acc ^= randbox[((*str++ >> 4) + acc) & 0xf]; acc = (acc << 2) | (acc >> 30); acc &= 0xffffffffU; } return acc; } /* ============ CodeError ============ */ static void CodeError( char *fmt, ... ) { va_list argptr; errorCount++; fprintf( stderr, "%s:%i ", currentFileName, currentFileLine ); va_start( argptr,fmt ); vfprintf( stderr, fmt, argptr ); va_end( argptr ); } /* ============ EmitByte ============ */ static void EmitByte( segment_t *seg, int v ) { if ( seg->imageUsed >= MAX_IMAGE ) { Error( "MAX_IMAGE" ); } seg->image[ seg->imageUsed ] = v; seg->imageUsed++; } /* ============ EmitInt ============ */ static void EmitInt( segment_t *seg, int v ) { if ( seg->imageUsed >= MAX_IMAGE - 4) { Error( "MAX_IMAGE" ); } seg->image[ seg->imageUsed ] = v & 255; seg->image[ seg->imageUsed + 1 ] = ( v >> 8 ) & 255; seg->image[ seg->imageUsed + 2 ] = ( v >> 16 ) & 255; seg->image[ seg->imageUsed + 3 ] = ( v >> 24 ) & 255; seg->imageUsed += 4; } /* ============ DefineSymbol Symbols can only be defined on pass 0 ============ */ static void DefineSymbol( char *sym, int value ) { /* Hand optimization by PhaethonH */ symbol_t *s; char expanded[MAX_LINE_LENGTH]; int hash; if ( passNumber == 1 ) { return; } // add the file prefix to local symbols to guarantee unique if ( sym[0] == '$' ) { sprintf( expanded, "%s_%i", sym, currentFileIndex ); sym = expanded; } hash = HashString( sym ); if (hashtable_symbol_exists(symtable, hash, sym)) { CodeError( "Multiple definitions for %s\n", sym ); return; } s = malloc( sizeof( *s ) ); s->next = NULL; s->name = copystring( sym ); s->hash = hash; s->value = value; s->segment = currentSegment; hashtable_add(symtable, hash, s); /* Hash table lookup already speeds up symbol lookup enormously. We postpone sorting until end of pass 0. Since we're not doing the insertion sort, lastSymbol should always wind up pointing to the end of list. This allows constant time for adding to the list. -PH */ if (symbols == 0) { lastSymbol = symbols = s; } else { lastSymbol->next = s; lastSymbol = s; } } /* ============ LookupSymbol Symbols can only be evaluated on pass 1 ============ */ static int LookupSymbol( char *sym ) { symbol_t *s; char expanded[MAX_LINE_LENGTH]; int hash; hashchain_t *hc; if ( passNumber == 0 ) { return 0; } // add the file prefix to local symbols to guarantee unique if ( sym[0] == '$' ) { sprintf( expanded, "%s_%i", sym, currentFileIndex ); sym = expanded; } hash = HashString( sym ); /* Hand optimization by PhaethonH Using a hash table with chain/bucket for lookups alone sped up q3asm by almost 3x for me. -PH */ for (hc = hashtable_get(symtable, hash); hc; hc = hc->next) { s = (symbol_t*)hc->data; /* ugly typecasting, but it's fast! */ if ( (hash == s->hash) && !strcmp(sym, s->name) ) { return s->segment->segmentBase + s->value; } } CodeError( "error: symbol %s undefined\n", sym ); passNumber = 0; DefineSymbol( sym, 0 ); // so more errors aren't printed passNumber = 1; return 0; } /* ============== ExtractLine Extracts the next line from the given text block. If a full line isn't parsed, returns NULL Otherwise returns the updated parse pointer =============== */ static char *ExtractLine( char *data ) { /* Goal: Given a string `data', extract one text line into buffer `lineBuffer' that is no longer than MAX_LINE_LENGTH characters long. Return value is remainder of `data' that isn't part of `lineBuffer'. -PH */ /* Hand-optimized by PhaethonH */ char *p, *q; currentFileLine++; lineParseOffset = 0; token[0] = 0; *lineBuffer = 0; p = q = data; if (!*q) { return NULL; } for ( ; !((*p == 0) || (*p == '\n')); p++) /* nop */ ; if ((p - q) >= MAX_LINE_LENGTH) { CodeError( "MAX_LINE_LENGTH" ); return data; } memcpy( lineBuffer, data, (p - data) ); lineBuffer[(p - data)] = 0; p += (*p == '\n') ? 1 : 0; /* Skip over final newline. */ return p; } /* ============== Parse Parse a token out of linebuffer ============== */ static qboolean Parse( void ) { /* Hand-optimized by PhaethonH */ const char *p, *q; /* Because lineParseOffset is only updated just before exit, this makes this code version somewhat harder to debug under a symbolic debugger. */ *token = 0; /* Clear token. */ // skip whitespace for (p = lineBuffer + lineParseOffset; *p && (*p <= ' '); p++) /* nop */ ; // skip ; comments /* die on end-of-string */ if ((*p == ';') || (*p == 0)) { lineParseOffset = p - lineBuffer; return qfalse; } q = p; /* Mark the start of token. */ /* Find separator first. */ for ( ; *p > 32; p++) /* nop */ ; /* XXX: unsafe assumptions. */ /* *p now sits on separator. Mangle other values accordingly. */ strncpy(token, q, p - q); token[p - q] = 0; lineParseOffset = p - lineBuffer; return qtrue; } /* ============== ParseValue ============== */ static int ParseValue( void ) { Parse(); return atoiNoCap( token ); } /* ============== ParseExpression ============== */ static int ParseExpression(void) { /* Hand optimization, PhaethonH */ int i, j; char sym[MAX_LINE_LENGTH]; int v; /* Skip over a leading minus. */ for ( i = ((token[0] == '-') ? 1 : 0) ; i < MAX_LINE_LENGTH ; i++ ) { if ( token[i] == '+' || token[i] == '-' || token[i] == 0 ) { break; } } memcpy( sym, token, i ); sym[i] = 0; switch (*sym) { /* Resolve depending on first character. */ /* Optimizing compilers can convert cases into "calculated jumps". I think these are faster. -PH */ case '-': case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': v = atoiNoCap(sym); break; default: v = LookupSymbol(sym); break; } // parse add / subtract offsets while ( token[i] != 0 ) { for ( j = i + 1 ; j < MAX_LINE_LENGTH ; j++ ) { if ( token[j] == '+' || token[j] == '-' || token[j] == 0 ) { break; } } memcpy( sym, token+i+1, j-i-1 ); sym[j-i-1] = 0; switch (token[i]) { case '+': v += atoiNoCap(sym); break; case '-': v -= atoiNoCap(sym); break; } i = j; } return v; } /* ============== HackToSegment BIG HACK: I want to put all 32 bit values in the data segment so they can be byte swapped, and all char data in the lit segment, but switch jump tables are emited in the lit segment and initialized strng variables are put in the data segment. I can change segments here, but I also need to fixup the label that was just defined Note that the lit segment is read-write in the VM, so strings aren't read only as in some architectures. ============== */ static void HackToSegment( segmentName_t seg ) { if ( currentSegment == &segment[seg] ) { return; } currentSegment = &segment[seg]; if ( passNumber == 0 ) { lastSymbol->segment = currentSegment; lastSymbol->value = currentSegment->imageUsed; } } //#define STAT(L) report("STAT " L "\n"); #define STAT(L) #define ASM(O) int TryAssemble##O () /* These clauses were moved out from AssembleLine() to allow reordering of if's. An optimizing compiler should reconstruct these back into inline code. -PH */ // call instructions reset currentArgOffset ASM(CALL) { if ( !strncmp( token, "CALL", 4 ) ) { STAT("CALL"); EmitByte( &segment[CODESEG], OP_CALL ); instructionCount++; currentArgOffset = 0; return 1; } return 0; } // arg is converted to a reversed store ASM(ARG) { if ( !strncmp( token, "ARG", 3 ) ) { STAT("ARG"); EmitByte( &segment[CODESEG], OP_ARG ); instructionCount++; if ( 8 + currentArgOffset >= 256 ) { CodeError( "currentArgOffset >= 256" ); return 1; } EmitByte( &segment[CODESEG], 8 + currentArgOffset ); currentArgOffset += 4; return 1; } return 0; } // ret just leaves something on the op stack ASM(RET) { if ( !strncmp( token, "RET", 3 ) ) { STAT("RET"); EmitByte( &segment[CODESEG], OP_LEAVE ); instructionCount++; EmitInt( &segment[CODESEG], 8 + currentLocals + currentArgs ); return 1; } return 0; } // pop is needed to discard the return value of // a function ASM(POP) { if ( !strncmp( token, "pop", 3 ) ) { STAT("POP"); EmitByte( &segment[CODESEG], OP_POP ); instructionCount++; return 1; } return 0; } // address of a parameter is converted to OP_LOCAL ASM(ADDRF) { int v; if ( !strncmp( token, "ADDRF", 5 ) ) { STAT("ADDRF"); instructionCount++; Parse(); v = ParseExpression(); v = 16 + currentArgs + currentLocals + v; EmitByte( &segment[CODESEG], OP_LOCAL ); EmitInt( &segment[CODESEG], v ); return 1; } return 0; } // address of a local is converted to OP_LOCAL ASM(ADDRL) { int v; if ( !strncmp( token, "ADDRL", 5 ) ) { STAT("ADDRL"); instructionCount++; Parse(); v = ParseExpression(); v = 8 + currentArgs + v; EmitByte( &segment[CODESEG], OP_LOCAL ); EmitInt( &segment[CODESEG], v ); return 1; } return 0; } ASM(PROC) { char name[1024]; if ( !strcmp( token, "proc" ) ) { STAT("PROC"); Parse(); // function name strcpy( name, token ); DefineSymbol( token, instructionCount ); // segment[CODESEG].imageUsed ); currentLocals = ParseValue(); // locals currentLocals = ( currentLocals + 3 ) & ~3; currentArgs = ParseValue(); // arg marshalling currentArgs = ( currentArgs + 3 ) & ~3; if ( 8 + currentLocals + currentArgs >= 32767 ) { CodeError( "Locals > 32k in %s\n", name ); } instructionCount++; EmitByte( &segment[CODESEG], OP_ENTER ); EmitInt( &segment[CODESEG], 8 + currentLocals + currentArgs ); return 1; } return 0; } ASM(ENDPROC) { if ( !strcmp( token, "endproc" ) ) { STAT("ENDPROC"); Parse(); // skip the function name ParseValue(); // locals ParseValue(); // arg marshalling // all functions must leave something on the opstack instructionCount++; EmitByte( &segment[CODESEG], OP_PUSH ); instructionCount++; EmitByte( &segment[CODESEG], OP_LEAVE ); EmitInt( &segment[CODESEG], 8 + currentLocals + currentArgs ); return 1; } return 0; } ASM(ADDRESS) { int v; if ( !strcmp( token, "address" ) ) { STAT("ADDRESS"); Parse(); v = ParseExpression(); /* Addresses are 32 bits wide, and therefore go into data segment. */ HackToSegment( DATASEG ); EmitInt( currentSegment, v ); if( passNumber == 1 && token[ 0 ] == '$' ) // crude test for labels EmitInt( &segment[ JTRGSEG ], v ); return 1; } return 0; } ASM(EXPORT) { if ( !strcmp( token, "export" ) ) { STAT("EXPORT"); return 1; } return 0; } ASM(IMPORT) { if ( !strcmp( token, "import" ) ) { STAT("IMPORT"); return 1; } return 0; } ASM(CODE) { if ( !strcmp( token, "code" ) ) { STAT("CODE"); currentSegment = &segment[CODESEG]; return 1; } return 0; } ASM(BSS) { if ( !strcmp( token, "bss" ) ) { STAT("BSS"); currentSegment = &segment[BSSSEG]; return 1; } return 0; } ASM(DATA) { if ( !strcmp( token, "data" ) ) { STAT("DATA"); currentSegment = &segment[DATASEG]; return 1; } return 0; } ASM(LIT) { if ( !strcmp( token, "lit" ) ) { STAT("LIT"); currentSegment = &segment[LITSEG]; return 1; } return 0; } ASM(LINE) { if ( !strcmp( token, "line" ) ) { STAT("LINE"); return 1; } return 0; } ASM(FILE) { if ( !strcmp( token, "file" ) ) { STAT("FILE"); return 1; } return 0; } ASM(EQU) { char name[1024]; if ( !strcmp( token, "equ" ) ) { STAT("EQU"); Parse(); strcpy( name, token ); Parse(); DefineSymbol( name, atoiNoCap(token) ); return 1; } return 0; } ASM(ALIGN) { int v; if ( !strcmp( token, "align" ) ) { STAT("ALIGN"); v = ParseValue(); currentSegment->imageUsed = (currentSegment->imageUsed + v - 1 ) & ~( v - 1 ); return 1; } return 0; } ASM(SKIP) { int v; if ( !strcmp( token, "skip" ) ) { STAT("SKIP"); v = ParseValue(); currentSegment->imageUsed += v; return 1; } return 0; } ASM(BYTE) { int i, v, v2; if ( !strcmp( token, "byte" ) ) { STAT("BYTE"); v = ParseValue(); v2 = ParseValue(); if ( v == 1 ) { /* Character (1-byte) values go into lit(eral) segment. */ HackToSegment( LITSEG ); } else if ( v == 4 ) { /* 32-bit (4-byte) values go into data segment. */ HackToSegment( DATASEG ); } else if ( v == 2 ) { /* and 16-bit (2-byte) values will cause q3asm to barf. */ CodeError( "16 bit initialized data not supported" ); } // emit little endien for ( i = 0 ; i < v ; i++ ) { EmitByte( currentSegment, (v2 & 0xFF) ); /* paranoid ANDing -PH */ v2 >>= 8; } return 1; } return 0; } // code labels are emited as instruction counts, not byte offsets, // because the physical size of the code will change with // different run time compilers and we want to minimize the // size of the required translation table ASM(LABEL) { if ( !strncmp( token, "LABEL", 5 ) ) { STAT("LABEL"); Parse(); if ( currentSegment == &segment[CODESEG] ) { DefineSymbol( token, instructionCount ); } else { DefineSymbol( token, currentSegment->imageUsed ); } return 1; } return 0; } /* ============== AssembleLine ============== */ static void AssembleLine( void ) { hashchain_t *hc; sourceOps_t *op; int i; int hash; Parse(); if ( !token[0] ) { return; } hash = HashString( token ); /* Opcode search using hash table. Since the opcodes stays mostly fixed, this may benefit even more from a tree. Always with the tree :) -PH */ for (hc = hashtable_get(optable, hash); hc; hc = hc->next) { op = (sourceOps_t*)(hc->data); i = op - sourceOps; if ((hash == opcodesHash[i]) && (!strcmp(token, op->name))) { int opcode; int expression; if ( op->opcode == OP_UNDEF ) { CodeError( "Undefined opcode: %s\n", token ); } if ( op->opcode == OP_IGNORE ) { return; // we ignore most conversions } // sign extensions need to check next parm opcode = op->opcode; if ( opcode == OP_SEX8 ) { Parse(); if ( token[0] == '1' ) { opcode = OP_SEX8; } else if ( token[0] == '2' ) { opcode = OP_SEX16; } else { CodeError( "Bad sign extension: %s\n", token ); return; } } // check for expression Parse(); if ( token[0] && op->opcode != OP_CVIF && op->opcode != OP_CVFI ) { expression = ParseExpression(); // code like this can generate non-dword block copies: // auto char buf[2] = " "; // we are just going to round up. This might conceivably // be incorrect if other initialized chars follow. if ( opcode == OP_BLOCK_COPY ) { expression = ( expression + 3 ) & ~3; } EmitByte( &segment[CODESEG], opcode ); EmitInt( &segment[CODESEG], expression ); } else { EmitByte( &segment[CODESEG], opcode ); } instructionCount++; return; } } /* This falls through if an assembly opcode is not found. -PH */ /* The following should be sorted in sequence of statistical frequency, most frequent first. -PH */ /* Empirical frequency statistics from FI 2001.01.23: 109892 STAT ADDRL 72188 STAT BYTE 51150 STAT LINE 50906 STAT ARG 43704 STAT IMPORT 34902 STAT LABEL 32066 STAT ADDRF 23704 STAT CALL 7720 STAT POP 7256 STAT RET 5198 STAT ALIGN 3292 STAT EXPORT 2878 STAT PROC 2878 STAT ENDPROC 2812 STAT ADDRESS 738 STAT SKIP 374 STAT EQU 280 STAT CODE 176 STAT LIT 102 STAT FILE 100 STAT BSS 68 STAT DATA -PH */ #undef ASM #define ASM(O) if (TryAssemble##O ()) return; ASM(ADDRL) ASM(BYTE) ASM(LINE) ASM(ARG) ASM(IMPORT) ASM(LABEL) ASM(ADDRF) ASM(CALL) ASM(POP) ASM(RET) ASM(ALIGN) ASM(EXPORT) ASM(PROC) ASM(ENDPROC) ASM(ADDRESS) ASM(SKIP) ASM(EQU) ASM(CODE) ASM(LIT) ASM(FILE) ASM(BSS) ASM(DATA) CodeError( "Unknown token: %s\n", token ); } /* ============== InitTables ============== */ void InitTables( void ) { int i; symtable = hashtable_new(symtablelen); optable = hashtable_new(100); /* There's hardly 100 opcodes anyway. */ for ( i = 0 ; i < NUM_SOURCE_OPS ; i++ ) { opcodesHash[i] = HashString( sourceOps[i].name ); hashtable_add(optable, opcodesHash[i], sourceOps + i); } } /* ============== WriteMapFile ============== */ static void WriteMapFile( void ) { FILE *f; symbol_t *s; char imageName[MAX_OS_PATH]; int seg; strcpy( imageName, outputFilename ); StripExtension( imageName ); strcat( imageName, ".map" ); report( "Writing %s...\n", imageName ); f = SafeOpenWrite( imageName ); for ( seg = CODESEG ; seg <= BSSSEG ; seg++ ) { for ( s = symbols ; s ; s = s->next ) { if ( s->name[0] == '$' ) { continue; // skip locals } if ( &segment[seg] != s->segment ) { continue; } fprintf( f, "%i %8x %s\n", seg, s->value, s->name ); } } fclose( f ); } /* =============== WriteVmFile =============== */ static void WriteVmFile( void ) { char imageName[MAX_OS_PATH]; vmHeader_t header; FILE *f; int headerSize; report( "%i total errors\n", errorCount ); strcpy( imageName, outputFilename ); StripExtension( imageName ); strcat( imageName, ".qvm" ); remove( imageName ); report( "code segment: %7i\n", segment[CODESEG].imageUsed ); report( "data segment: %7i\n", segment[DATASEG].imageUsed ); report( "lit segment: %7i\n", segment[LITSEG].imageUsed ); report( "bss segment: %7i\n", segment[BSSSEG].imageUsed ); report( "instruction count: %i\n", instructionCount ); if ( errorCount != 0 ) { report( "Not writing a file due to errors\n" ); return; } if( !options.vanillaQ3Compatibility ) { header.vmMagic = VM_MAGIC_VER2; headerSize = sizeof( header ); } else { header.vmMagic = VM_MAGIC; // Don't write the VM_MAGIC_VER2 bits when maintaining 1.32b compatibility. // (I know this isn't strictly correct due to padding, but then platforms // that pad wouldn't be able to write a correct header anyway). Note: if // vmHeader_t changes, this needs to be adjusted too. headerSize = sizeof( header ) - sizeof( header.jtrgLength ); } header.instructionCount = instructionCount; header.codeOffset = headerSize; header.codeLength = segment[CODESEG].imageUsed; header.dataOffset = header.codeOffset + segment[CODESEG].imageUsed; header.dataLength = segment[DATASEG].imageUsed; header.litLength = segment[LITSEG].imageUsed; header.bssLength = segment[BSSSEG].imageUsed; header.jtrgLength = segment[JTRGSEG].imageUsed; report( "Writing to %s\n", imageName ); #ifdef Q3_BIG_ENDIAN { int i; // byte swap the header for ( i = 0 ; i < sizeof( vmHeader_t ) / 4 ; i++ ) { ((int *)&header)[i] = LittleLong( ((int *)&header)[i] ); } } #endif CreatePath( imageName ); f = SafeOpenWrite( imageName ); SafeWrite( f, &header, headerSize ); SafeWrite( f, &segment[CODESEG].image, segment[CODESEG].imageUsed ); SafeWrite( f, &segment[DATASEG].image, segment[DATASEG].imageUsed ); SafeWrite( f, &segment[LITSEG].image, segment[LITSEG].imageUsed ); if( !options.vanillaQ3Compatibility ) { SafeWrite( f, &segment[JTRGSEG].image, segment[JTRGSEG].imageUsed ); } fclose( f ); } /* =============== Assemble =============== */ static void Assemble( void ) { int i; char filename[MAX_OS_PATH]; char *ptr; report( "outputFilename: %s\n", outputFilename ); for ( i = 0 ; i < numAsmFiles ; i++ ) { strcpy( filename, asmFileNames[ i ] ); DefaultExtension( filename, ".asm" ); LoadFile( filename, (void **)&asmFiles[i] ); } // assemble for ( passNumber = 0 ; passNumber < 2 ; passNumber++ ) { segment[LITSEG].segmentBase = segment[DATASEG].imageUsed; segment[BSSSEG].segmentBase = segment[LITSEG].segmentBase + segment[LITSEG].imageUsed; segment[JTRGSEG].segmentBase = segment[BSSSEG].segmentBase + segment[BSSSEG].imageUsed; for ( i = 0 ; i < NUM_SEGMENTS ; i++ ) { segment[i].imageUsed = 0; } segment[DATASEG].imageUsed = 4; // skip the 0 byte, so NULL pointers are fixed up properly instructionCount = 0; for ( i = 0 ; i < numAsmFiles ; i++ ) { currentFileIndex = i; currentFileName = asmFileNames[ i ]; currentFileLine = 0; report("pass %i: %s\n", passNumber, currentFileName ); fflush( NULL ); ptr = asmFiles[i]; while ( ptr ) { ptr = ExtractLine( ptr ); AssembleLine(); } } // align all segment for ( i = 0 ; i < NUM_SEGMENTS ; i++ ) { segment[i].imageUsed = (segment[i].imageUsed + 3) & ~3; } if (passNumber == 0) { sort_symbols(); } } // reserve the stack in bss DefineSymbol( "_stackStart", segment[BSSSEG].imageUsed ); segment[BSSSEG].imageUsed += stackSize; DefineSymbol( "_stackEnd", segment[BSSSEG].imageUsed ); // write the image WriteVmFile(); // write the map file even if there were errors if( options.writeMapFile ) { WriteMapFile(); } } /* ============= ParseOptionFile ============= */ static void ParseOptionFile( const char *filename ) { char expanded[MAX_OS_PATH]; char *text, *text_p; strcpy( expanded, filename ); DefaultExtension( expanded, ".q3asm" ); LoadFile( expanded, (void **)&text ); if ( !text ) { return; } text_p = text; while( ( text_p = COM_Parse( text_p ) ) != 0 ) { if ( !strcmp( com_token, "-o" ) ) { // allow output override in option file text_p = COM_Parse( text_p ); if ( text_p ) { strcpy( outputFilename, com_token ); } continue; } asmFileNames[ numAsmFiles ] = copystring( com_token ); numAsmFiles++; } } static void ShowHelp( char *argv0 ) { Error("Usage: %s [OPTION]... [FILES]...\n\ Assemble LCC bytecode assembly to Q3VM bytecode.\n\ \n\ -o OUTPUT Write assembled output to file OUTPUT.qvm\n\ -f LISTFILE Read options and list of files to assemble from LISTFILE.q3asm\n\ -b BUCKETS Set symbol hash table to BUCKETS buckets\n\ -m Generate a mapfile for each OUTPUT.qvm\n\ -v Verbose compilation report\n\ -vq3 Produce a qvm file compatible with Q3 1.32b\n\ -h --help -? Show this help\n\ ", argv0); } /* ============== main ============== */ int main( int argc, char **argv ) { int i; double start, end; // _chdir( "/quake3/jccode/cgame/lccout" ); // hack for vc profiler if ( argc < 2 ) { ShowHelp( argv[0] ); } start = I_FloatTime (); // default filename is "q3asm" strcpy( outputFilename, "q3asm" ); numAsmFiles = 0; for ( i = 1 ; i < argc ; i++ ) { if ( argv[i][0] != '-' ) { break; } if( !strcmp( argv[ i ], "-h" ) || !strcmp( argv[ i ], "--help" ) || !strcmp( argv[ i ], "-?") ) { ShowHelp( argv[0] ); } if ( !strcmp( argv[i], "-o" ) ) { if ( i == argc - 1 ) { Error( "-o must preceed a filename" ); } /* Timbo of Tremulous pointed out -o not working; stock ID q3asm folded in the change. Yay. */ strcpy( outputFilename, argv[ i+1 ] ); i++; continue; } if ( !strcmp( argv[i], "-f" ) ) { if ( i == argc - 1 ) { Error( "-f must preceed a filename" ); } ParseOptionFile( argv[ i+1 ] ); i++; continue; } if (!strcmp(argv[i], "-b")) { if (i == argc - 1) { Error("-b requires an argument"); } i++; symtablelen = atoiNoCap(argv[i]); continue; } if( !strcmp( argv[ i ], "-v" ) ) { /* Verbosity option added by Timbo, 2002.09.14. By default (no -v option), q3asm remains silent except for critical errors. Verbosity turns on all messages, error or not. Motivation: not wanting to scrollback for pages to find asm error. */ options.verbose = qtrue; continue; } if( !strcmp( argv[ i ], "-m" ) ) { options.writeMapFile = qtrue; continue; } if( !strcmp( argv[ i ], "-vq3" ) ) { options.vanillaQ3Compatibility = qtrue; continue; } Error( "Unknown option: %s", argv[i] ); } // the rest of the command line args are asm files for ( ; i < argc ; i++ ) { asmFileNames[ numAsmFiles ] = copystring( argv[ i ] ); numAsmFiles++; } // In some case it Segfault without this check if ( numAsmFiles == 0 ) { Error( "No file to assemble" ); } InitTables(); Assemble(); { symbol_t *s; for ( i = 0, s = symbols ; s ; s = s->next, i++ ) /* nop */ ; if (options.verbose) { report("%d symbols defined\n", i); hashtable_stats(symtable); hashtable_stats(optable); } } end = I_FloatTime (); report ("%5.0f seconds elapsed\n", end-start); return errorCount; }