/* The Netwide Assembler main program module * * The Netwide Assembler is copyright (C) 1996 Simon Tatham and * Julian Hall. All rights reserved. The software is * redistributable under the licence given in the file "Licence" * distributed in the NASM archive. */ #include #include #include #include #include #include "nasm.h" #include "nasmlib.h" #include "insns.h" #include "preproc.h" #include "parser.h" #include "eval.h" #include "assemble.h" #include "labels.h" #include "outform.h" #include "listing.h" struct forwrefinfo { /* info held on forward refs. */ int lineno; int operand; }; static int get_bits (char *value); static unsigned long get_cpu (char *cpu_str); static void report_error (int, char *, ...); static void parse_cmdline (int, char **); static void assemble_file (char *); static int getkw (char *buf, char **value); static void register_output_formats(void); static void usage(void); static int using_debug_info; int tasm_compatible_mode = FALSE; int pass0; static char inname[FILENAME_MAX]; static char outname[FILENAME_MAX]; static char listname[FILENAME_MAX]; static int globallineno; /* for forward-reference tracking */ /* static int pass = 0; */ static struct ofmt *ofmt = NULL; static FILE *error_file; /* Where to write error messages */ static FILE *ofile = NULL; int optimizing = -1; /* number of optimization passes to take */ static int sb, cmd_sb = 16; /* by default */ static unsigned long cmd_cpu = IF_PLEVEL; /* highest level by default */ static unsigned long cpu = IF_PLEVEL; /* passed to insn_size & assemble.c */ int global_offset_changed; /* referenced in labels.c */ static loc_t location; int in_abs_seg; /* Flag we are in ABSOLUTE seg */ static long abs_seg; static struct RAA *offsets; static long abs_offset; static struct SAA *forwrefs; /* keep track of forward references */ static struct forwrefinfo *forwref; static Preproc *preproc; enum op_type { op_normal, /* Preprocess and assemble */ op_preprocess, /* Preprocess only */ op_depend /* Generate dependencies */ }; static enum op_type operating_mode; /* * Which of the suppressible warnings are suppressed. Entry zero * doesn't do anything. Initial defaults are given here. */ static char suppressed[1+ERR_WARN_MAX] = { 0, TRUE, TRUE, TRUE, FALSE, TRUE }; /* * The option names for the suppressible warnings. As before, entry * zero does nothing. */ static char *suppressed_names[1+ERR_WARN_MAX] = { NULL, "macro-params", "macro-selfref", "orphan-labels", "number-overflow", "gnu-elf-extensions" }; /* * The explanations for the suppressible warnings. As before, entry * zero does nothing. */ static char *suppressed_what[1+ERR_WARN_MAX] = { NULL, "macro calls with wrong no. of params", "cyclic macro self-references", "labels alone on lines without trailing `:'", "numeric constants greater than 0xFFFFFFFF", "using 8- or 16-bit relocation in ELF, a GNU extension" }; /* * This is a null preprocessor which just copies lines from input * to output. It's used when someone explicitly requests that NASM * not preprocess their source file. */ static void no_pp_reset (char *, int, efunc, evalfunc, ListGen *); static char *no_pp_getline (void); static void no_pp_cleanup (int); static Preproc no_pp = { no_pp_reset, no_pp_getline, no_pp_cleanup }; /* * get/set current offset... */ #define GET_CURR_OFFS (in_abs_seg?abs_offset:\ raa_read(offsets,location.segment)) #define SET_CURR_OFFS(x) (in_abs_seg?(void)(abs_offset=(x)):\ (void)(offsets=raa_write(offsets,location.segment,(x)))) static int want_usage; static int terminate_after_phase; int user_nolist = 0; /* fbk 9/2/00 */ static void nasm_fputs(char *line, FILE *ofile) { if (ofile) { fputs(line, ofile); fputc('\n', ofile); } else puts(line); } int main(int argc, char **argv) { pass0 = 1; want_usage = terminate_after_phase = FALSE; nasm_set_malloc_error (report_error); offsets = raa_init(); forwrefs = saa_init ((long)sizeof(struct forwrefinfo)); preproc = &nasmpp; operating_mode = op_normal; error_file = stderr; seg_init(); register_output_formats(); parse_cmdline(argc, argv); if (terminate_after_phase) { if (want_usage) usage(); return 1; } if (ofmt->stdmac) pp_extra_stdmac (ofmt->stdmac); parser_global_info (ofmt, &location); eval_global_info (ofmt, lookup_label, &location); /* define some macros dependent of command-line */ { char temp [64]; sprintf (temp, "__OUTPUT_FORMAT__=%s\n", ofmt->shortname); pp_pre_define (temp); } switch ( operating_mode ) { case op_depend: { char *line; preproc->reset (inname, 0, report_error, evaluate, &nasmlist); if (outname[0] == '\0') ofmt->filename (inname, outname, report_error); ofile = NULL; fprintf(stdout, "%s: %s", outname, inname); while ( (line = preproc->getline()) ) nasm_free (line); preproc->cleanup(0); putc('\n', stdout); } break; case op_preprocess: { char *line; char *file_name = NULL; long prior_linnum=0; int lineinc=0; if (*outname) { ofile = fopen(outname, "w"); if (!ofile) report_error (ERR_FATAL | ERR_NOFILE, "unable to open output file `%s'", outname); } else ofile = NULL; location.known = FALSE; /* pass = 1; */ preproc->reset (inname, 2, report_error, evaluate, &nasmlist); while ( (line = preproc->getline()) ) { /* * We generate %line directives if needed for later programs */ long linnum = prior_linnum += lineinc; int altline = src_get(&linnum, &file_name); if (altline) { if (altline==1 && lineinc==1) nasm_fputs("", ofile); else { lineinc = (altline != -1 || lineinc!=1); fprintf(ofile ? ofile : stdout, "%%line %ld+%d %s\n", linnum, lineinc, file_name); } prior_linnum = linnum; } nasm_fputs(line, ofile); nasm_free (line); } nasm_free(file_name); preproc->cleanup(0); if (ofile) fclose(ofile); if (ofile && terminate_after_phase) remove(outname); } break; case op_normal: { /* * We must call ofmt->filename _anyway_, even if the user * has specified their own output file, because some * formats (eg OBJ and COFF) use ofmt->filename to find out * the name of the input file and then put that inside the * file. */ ofmt->filename (inname, outname, report_error); ofile = fopen(outname, "wb"); if (!ofile) { report_error (ERR_FATAL | ERR_NOFILE, "unable to open output file `%s'", outname); } /* * We must call init_labels() before ofmt->init() since * some object formats will want to define labels in their * init routines. (eg OS/2 defines the FLAT group) */ init_labels (); ofmt->init (ofile, report_error, define_label, evaluate); assemble_file (inname); if (!terminate_after_phase) { ofmt->cleanup (using_debug_info); cleanup_labels (); } else { /* * We had an fclose on the output file here, but we * actually do that in all the object file drivers as well, * so we're leaving out the one here. * fclose (ofile); */ remove(outname); if (listname[0]) remove(listname); } } break; } if (want_usage) usage(); raa_free (offsets); saa_free (forwrefs); eval_cleanup (); nasmlib_cleanup (); if (terminate_after_phase) return 1; else return 0; } /* * Get a parameter for a command line option. * First arg must be in the form of e.g. -f... */ static char *get_param (char *p, char *q, int *advance) { *advance = 0; if (p[2]) /* the parameter's in the option */ { p += 2; while (isspace(*p)) p++; return p; } if (q && q[0]) { *advance = 1; return q; } report_error (ERR_NONFATAL | ERR_NOFILE | ERR_USAGE, "option `-%c' requires an argument", p[1]); return NULL; } struct textargs { char *label; int value; }; #define OPT_PREFIX 0 #define OPT_POSTFIX 1 struct textargs textopts[] = { {"prefix",OPT_PREFIX}, {"postfix",OPT_POSTFIX}, {NULL,0} }; int stopoptions = 0; static int process_arg (char *p, char *q) { char *param; int i, advance = 0; if (!p || !p[0]) return 0; if (p[0]=='-' && ! stopoptions) { switch (p[1]) { case 's': error_file = stdout; break; case 'o': /* these parameters take values */ case 'O': case 'f': case 'p': case 'P': case 'd': case 'D': case 'i': case 'I': case 'l': case 'E': case 'F': if ( !(param = get_param (p, q, &advance)) ) break; if (p[1]=='o') { /* output file */ strcpy (outname, param); } else if (p[1]=='f') { /* output format */ ofmt = ofmt_find(param); if (!ofmt) { report_error (ERR_FATAL | ERR_NOFILE | ERR_USAGE, "unrecognised output format `%s' - " "use -hf for a list", param); } else ofmt->current_dfmt = ofmt->debug_formats[0]; } else if (p[1]=='O') { /* Optimization level */ int opt; if (!isdigit(*param)) report_error(ERR_FATAL, "command line optimization level must be 0..3 or "); opt = atoi(param); if (opt<=0) optimizing = -1; /* 0.98 behaviour */ else if (opt==1) optimizing = 0; /* Two passes, 0.98.09 behavior */ else if (opt<=3) optimizing = opt*5; /* Multiple passes */ else optimizing = opt; /* Multiple passes */ } else if (p[1]=='P' || p[1]=='p') { /* pre-include */ pp_pre_include (param); } else if (p[1]=='D' || p[1]=='d') { /* pre-define */ pp_pre_define (param); } else if (p[1]=='U' || p[1]=='u') { /* un-define */ pp_pre_undefine (param); } else if (p[1]=='I' || p[1]=='i') { /* include search path */ pp_include_path (param); } else if (p[1]=='l') { /* listing file */ strcpy (listname, param); } else if (p[1]=='E') { /* error messages file */ error_file = fopen(param, "w"); if ( !error_file ) { error_file = stderr; /* Revert to default! */ report_error (ERR_FATAL | ERR_NOFILE | ERR_USAGE, "cannot open file `%s' for error messages", param); } } else if (p[1] == 'F') { /* specify debug format */ ofmt->current_dfmt = dfmt_find(ofmt, param); if (!ofmt->current_dfmt) { report_error (ERR_FATAL | ERR_NOFILE | ERR_USAGE, "unrecognized debug format `%s' for" " output format `%s'", param, ofmt->shortname); } } break; case 'g': using_debug_info = TRUE; break; case 'h': printf("usage: nasm [-@ response file] [-o outfile] [-f format] " "[-l listfile]\n" " [options...] [--] filename\n" " or nasm -r for version info (obsolete)\n" " or nasm -v for version info (preferred)\n\n" " -t Assemble in SciTech TASM compatible mode\n" " -g Generate debug information in selected format.\n"); printf(" -e preprocess only (writes output to stdout by default)\n" " -a don't preprocess (assemble only)\n" " -M generate Makefile dependencies on stdout\n\n" " -E redirect error messages to file\n" " -s redirect error messages to stdout\n\n" " -F format select a debugging format\n\n" " -I adds a pathname to the include file path\n"); printf(" -O optimize branch offsets (-O0 disables, default)\n" " -P pre-includes a file\n" " -D[=] pre-defines a macro\n" " -U undefines a macro\n" " -w+foo enables warnings about foo; -w-foo disables them\n" "where foo can be:\n"); for (i=1; i<=ERR_WARN_MAX; i++) printf(" %-23s %s (default %s)\n", suppressed_names[i], suppressed_what[i], suppressed[i] ? "off" : "on"); printf ("\nresponse files should contain command line parameters" ", one per line.\n"); if (p[2] == 'f') { printf("\nvalid output formats for -f are" " (`*' denotes default):\n"); ofmt_list(ofmt, stdout); } else { printf ("\nFor a list of valid output formats, use -hf.\n"); printf ("For a list of debug formats, use -f
-y.\n"); } exit (0); /* never need usage message here */ break; case 'y': printf("\nvalid debug formats for '%s' output format are" " ('*' denotes default):\n", ofmt->shortname); dfmt_list(ofmt, stdout); exit(0); break; case 't': tasm_compatible_mode = TRUE; break; case 'r': case 'v': printf("NASM version %s compiled " #ifdef DEBUG "with -DDEBUG " #endif "on " __DATE__ "\n", NASM_VER); exit (0); /* never need usage message here */ break; case 'e': /* preprocess only */ operating_mode = op_preprocess; break; case 'a': /* assemble only - don't preprocess */ preproc = &no_pp; break; case 'w': if (p[2] != '+' && p[2] != '-') { report_error (ERR_NONFATAL | ERR_NOFILE | ERR_USAGE, "invalid option to `-w'"); } else { for (i=1; i<=ERR_WARN_MAX; i++) if (!nasm_stricmp(p+3, suppressed_names[i])) break; if (i <= ERR_WARN_MAX) suppressed[i] = (p[2] == '-'); else report_error (ERR_NONFATAL | ERR_NOFILE | ERR_USAGE, "invalid option to `-w'"); } break; case 'M': operating_mode = op_depend; break; case '-': { int s; if (p[2]==0) { /* -- => stop processing options */ stopoptions = 1; break; } for(s=0; textopts[s].label; s++) { if(!nasm_stricmp(p+2, textopts[s].label)) { break; } } switch(s) { case OPT_PREFIX: case OPT_POSTFIX: { if (!q) { report_error (ERR_NONFATAL | ERR_NOFILE | ERR_USAGE, "option `--%s' requires an argument", p+2); break; } else { advance = 1, param = q; } if(s == OPT_PREFIX) { strncpy(lprefix,param,PREFIX_MAX-1); lprefix[PREFIX_MAX-1]=0; break; } if(s == OPT_POSTFIX) { strncpy(lpostfix,param,POSTFIX_MAX-1); lpostfix[POSTFIX_MAX-1]=0; break; } break; } default: { report_error (ERR_NONFATAL | ERR_NOFILE | ERR_USAGE, "unrecognised option `--%s'", p+2); break; } } break; } default: if (!ofmt->setinfo(GI_SWITCH,&p)) report_error (ERR_NONFATAL | ERR_NOFILE | ERR_USAGE, "unrecognised option `-%c'", p[1]); break; } } else { if (*inname) { report_error (ERR_NONFATAL | ERR_NOFILE | ERR_USAGE, "more than one input file specified"); } else strcpy(inname, p); } return advance; } #define ARG_BUF_DELTA 128 static void process_respfile (FILE *rfile) { char *buffer, *p, *q, *prevarg; int bufsize, prevargsize; bufsize = prevargsize = ARG_BUF_DELTA; buffer = nasm_malloc(ARG_BUF_DELTA); prevarg = nasm_malloc(ARG_BUF_DELTA); prevarg[0] = '\0'; while (1) { /* Loop to handle all lines in file */ p = buffer; while (1) { /* Loop to handle long lines */ q = fgets(p, bufsize-(p-buffer), rfile); if (!q) break; p += strlen(p); if (p > buffer && p[-1] == '\n') break; if (p-buffer > bufsize-10) { int offset; offset = p - buffer; bufsize += ARG_BUF_DELTA; buffer = nasm_realloc(buffer, bufsize); p = buffer + offset; } } if (!q && p == buffer) { if (prevarg[0]) process_arg (prevarg, NULL); nasm_free (buffer); nasm_free (prevarg); return; } /* * Play safe: remove CRs, LFs and any spurious ^Zs, if any of * them are present at the end of the line. */ *(p = &buffer[strcspn(buffer, "\r\n\032")]) = '\0'; while (p > buffer && isspace(p[-1])) *--p = '\0'; p = buffer; while (isspace(*p)) p++; if (process_arg (prevarg, p)) *p = '\0'; if (strlen(p) > prevargsize-10) { prevargsize += ARG_BUF_DELTA; prevarg = nasm_realloc(prevarg, prevargsize); } strcpy (prevarg, p); } } /* Function to process args from a string of args, rather than the * argv array. Used by the environment variable and response file * processing. */ static void process_args (char *args) { char *p, *q, *arg, *prevarg; char separator = ' '; p = args; if (*p && *p != '-') separator = *p++; arg = NULL; while (*p) { q = p; while (*p && *p != separator) p++; while (*p == separator) *p++ = '\0'; prevarg = arg; arg = q; if (process_arg (prevarg, arg)) arg = NULL; } if (arg) process_arg (arg, NULL); } static void parse_cmdline(int argc, char **argv) { FILE *rfile; char *envreal, *envcopy=NULL, *p, *arg; *inname = *outname = *listname = '\0'; /* * First, process the NASMENV environment variable. */ envreal = getenv("NASMENV"); arg = NULL; if (envreal) { envcopy = nasm_strdup(envreal); process_args(envcopy); nasm_free (envcopy); } /* * Now process the actual command line. */ while (--argc) { int i; argv++; if (argv[0][0] == '@') { /* We have a response file, so process this as a set of * arguments like the environment variable. This allows us * to have multiple arguments on a single line, which is * different to the -@resp file processing below for regular * NASM. */ char *str = malloc(2048); FILE *f = fopen(&argv[0][1],"r"); if (!str) { printf("out of memory"); exit(-1); } if (f) { while (fgets(str,2048,f)) { process_args(str); } fclose(f); } free(str); argc--; argv++; } if (!stopoptions && argv[0][0] == '-' && argv[0][1] == '@') { if ((p = get_param (argv[0], argc > 1 ? argv[1] : NULL, &i))) { if ((rfile = fopen(p, "r"))) { process_respfile (rfile); fclose(rfile); } else report_error (ERR_NONFATAL | ERR_NOFILE | ERR_USAGE, "unable to open response file `%s'", p); } } else i = process_arg (argv[0], argc > 1 ? argv[1] : NULL); argv += i, argc -= i; } if (!*inname) report_error (ERR_NONFATAL | ERR_NOFILE | ERR_USAGE, "no input file specified"); } static void assemble_file (char *fname) { char * value, * p, * q, * special, * line, debugid[80]; insn output_ins; int i, rn_error, validid; long seg, offs; struct tokenval tokval; expr * e; int pass, pass_max; int pass_cnt = 0; /* count actual passes */ if (cmd_sb == 32 && cmd_cpu < IF_386) report_error(ERR_FATAL, "command line: " "32-bit segment size requires a higher cpu"); pass_max = (optimizing>0 ? optimizing : 0) + 2; /* passes 1, optimizing, then 2 */ pass0 = !(optimizing>0); /* start at 1 if not optimizing */ for (pass = 1; pass <= pass_max && pass0 <= 2; pass++) { int pass1, pass2; ldfunc def_label; pass1 = pass < pass_max ? 1 : 2; /* seq is 1, 1, 1,..., 1, 2 */ pass2 = pass > 1 ? 2 : 1; /* seq is 1, 2, 2,..., 2, 2 */ /* pass0 seq is 0, 0, 0,..., 1, 2 */ def_label = pass > 1 ? redefine_label : define_label; sb = cmd_sb; /* set 'bits' to command line default */ cpu = cmd_cpu; if (pass0 == 2) { if (*listname) nasmlist.init(listname, report_error); } in_abs_seg = FALSE; global_offset_changed = FALSE; /* set by redefine_label */ location.segment = ofmt->section(NULL, pass2, &sb); if (pass > 1) { saa_rewind (forwrefs); forwref = saa_rstruct (forwrefs); raa_free (offsets); offsets = raa_init(); } preproc->reset(fname, pass1, report_error, evaluate, &nasmlist); globallineno = 0; if (pass == 1) location.known = TRUE; location.offset = offs = GET_CURR_OFFS; while ( (line = preproc->getline()) ) { globallineno++; /* here we parse our directives; this is not handled by the 'real' * parser. */ if ( (i = getkw (line, &value)) ) { switch (i) { case 1: /* [SEGMENT n] */ seg = ofmt->section (value, pass2, &sb); if (seg == NO_SEG) { report_error (pass1==1 ? ERR_NONFATAL : ERR_PANIC, "segment name `%s' not recognised", value); } else { in_abs_seg = FALSE; location.segment = seg; } break; case 2: /* [EXTERN label:special] */ if (*value == '$') value++; /* skip initial $ if present */ if (pass0 == 2) { q = value; while (*q && *q != ':') q++; if (*q == ':') { *q++ = '\0'; ofmt->symdef(value, 0L, 0L, 3, q); } } else if (pass == 1) { /* pass == 1 */ q = value; validid = TRUE; if (!isidstart(*q)) validid = FALSE; while (*q && *q != ':') { if (!isidchar(*q)) validid = FALSE; q++; } if (!validid) { report_error (ERR_NONFATAL, "identifier expected after EXTERN"); break; } if (*q == ':') { *q++ = '\0'; special = q; } else special = NULL; if (!is_extern(value)) { /* allow re-EXTERN to be ignored */ int temp = pass0; pass0 = 1; /* fake pass 1 in labels.c */ declare_as_global (value, special, report_error); define_label (value, seg_alloc(), 0L, NULL, FALSE, TRUE, ofmt, report_error); pass0 = temp; } } /* else pass0 == 1 */ break; case 3: /* [BITS bits] */ sb = get_bits(value); break; case 4: /* [GLOBAL symbol:special] */ if (*value == '$') value++; /* skip initial $ if present */ if (pass0 == 2) { /* pass 2 */ q = value; while (*q && *q != ':') q++; if (*q == ':') { *q++ = '\0'; ofmt->symdef(value, 0L, 0L, 3, q); } } else if (pass2 == 1) { /* pass == 1 */ q = value; validid = TRUE; if (!isidstart(*q)) validid = FALSE; while (*q && *q != ':') { if (!isidchar(*q)) validid = FALSE; q++; } if (!validid) { report_error (ERR_NONFATAL, "identifier expected after GLOBAL"); break; } if (*q == ':') { *q++ = '\0'; special = q; } else special = NULL; declare_as_global (value, special, report_error); } /* pass == 1 */ break; case 5: /* [COMMON symbol size:special] */ if (*value == '$') value++; /* skip initial $ if present */ if (pass0 == 1) { p = value; validid = TRUE; if (!isidstart(*p)) validid = FALSE; while (*p && !isspace(*p)) { if (!isidchar(*p)) validid = FALSE; p++; } if (!validid) { report_error (ERR_NONFATAL, "identifier expected after COMMON"); break; } if (*p) { long size; while (*p && isspace(*p)) *p++ = '\0'; q = p; while (*q && *q != ':') q++; if (*q == ':') { *q++ = '\0'; special = q; } else special = NULL; size = readnum (p, &rn_error); if (rn_error) report_error (ERR_NONFATAL, "invalid size specified" " in COMMON declaration"); else define_common (value, seg_alloc(), size, special, ofmt, report_error); } else report_error (ERR_NONFATAL, "no size specified in" " COMMON declaration"); } else if (pass0 == 2) { /* pass == 2 */ q = value; while (*q && *q != ':') { if (isspace(*q)) *q = '\0'; q++; } if (*q == ':') { *q++ = '\0'; ofmt->symdef(value, 0L, 0L, 3, q); } } break; case 6: /* [ABSOLUTE address] */ stdscan_reset(); stdscan_bufptr = value; tokval.t_type = TOKEN_INVALID; e = evaluate(stdscan, NULL, &tokval, NULL, pass2, report_error, NULL); if (e) { if (!is_reloc(e)) report_error (pass0==1 ? ERR_NONFATAL : ERR_PANIC, "cannot use non-relocatable expression as " "ABSOLUTE address"); else { abs_seg = reloc_seg(e); abs_offset = reloc_value(e); } } else if (pass==1) abs_offset = 0x100;/* don't go near zero in case of / */ else report_error (ERR_PANIC, "invalid ABSOLUTE address " "in pass two"); in_abs_seg = TRUE; location.segment = abs_seg; break; case 7: /* DEBUG */ p = value; q = debugid; validid = TRUE; if (!isidstart(*p)) validid = FALSE; while (*p && !isspace(*p)) { if (!isidchar(*p)) validid = FALSE; *q++ = *p++; } *q++ = 0; if (!validid) { report_error (pass==1 ? ERR_NONFATAL : ERR_PANIC, "identifier expected after DEBUG"); break; } while (*p && isspace(*p)) p++; if (pass==pass_max) ofmt->current_dfmt->debug_directive (debugid, p); break; case 8: /* [WARNING {+|-}warn-name] */ if (pass1 == 1) { while (*value && isspace(*value)) value++; if (*value == '+' || *value == '-') { validid = (*value == '-') ? TRUE : FALSE; value++; } else validid = FALSE; for (i=1; i<=ERR_WARN_MAX; i++) if (!nasm_stricmp(value, suppressed_names[i])) break; if (i <= ERR_WARN_MAX) suppressed[i] = validid; else report_error (ERR_NONFATAL, "invalid warning id in WARNING directive"); } break; case 9: /* cpu */ cpu = get_cpu (value); break; case 10: /* fbk 9/2/00 */ /* [LIST {+|-}] */ while (*value && isspace(*value)) value++; if (*value == '+') { user_nolist = 0; } else { if (*value == '-') { user_nolist = 1; } else { report_error (ERR_NONFATAL, "invalid parameter to \"list\" directive"); } } break; default: if (!ofmt->directive (line+1, value, pass2)) report_error (pass1==1 ? ERR_NONFATAL : ERR_PANIC, "unrecognised directive [%s]", line+1); } } else /* it isn't a directive */ { parse_line (pass1, line, &output_ins, report_error, evaluate, def_label); if (!(optimizing>0) && pass == 2) { if (forwref != NULL && globallineno == forwref->lineno) { output_ins.forw_ref = TRUE; do { output_ins.oprs[forwref->operand].opflags |= OPFLAG_FORWARD; forwref = saa_rstruct (forwrefs); } while (forwref != NULL && forwref->lineno == globallineno); } else output_ins.forw_ref = FALSE; } if (!(optimizing>0) && output_ins.forw_ref) { if (pass == 1) { for(i = 0; i < output_ins.operands; i++) { if (output_ins.oprs[i].opflags & OPFLAG_FORWARD) { struct forwrefinfo *fwinf = (struct forwrefinfo *)saa_wstruct(forwrefs); fwinf->lineno = globallineno; fwinf->operand = i; } } } else { /* pass == 2 */ /* * Hack to prevent phase error in the code * rol ax,x * x equ 1 * * If the second operand is a forward reference, * the UNITY property of the number 1 in that * operand is cancelled. Otherwise the above * sequence will cause a phase error. * * This hack means that the above code will * generate 286+ code. * * The forward reference will mean that the * operand will not have the UNITY property on * the first pass, so the pass behaviours will * be consistent. */ if (output_ins.operands >= 2 && (output_ins.oprs[1].opflags & OPFLAG_FORWARD)) { output_ins.oprs[1].type &= ~(ONENESS|BYTENESS); } } /* pass == 2 */ } /* forw_ref */ if (output_ins.opcode == I_EQU) { if (pass1 == 1) { /* * Special `..' EQUs get processed in pass two, * except `..@' macro-processor EQUs which are done * in the normal place. */ if (!output_ins.label) report_error (ERR_NONFATAL, "EQU not preceded by label"); else if (output_ins.label[0] != '.' || output_ins.label[1] != '.' || output_ins.label[2] == '@') { if (output_ins.operands == 1 && (output_ins.oprs[0].type & IMMEDIATE) && output_ins.oprs[0].wrt == NO_SEG) { int isext = output_ins.oprs[0].opflags & OPFLAG_EXTERN; def_label (output_ins.label, output_ins.oprs[0].segment, output_ins.oprs[0].offset, NULL, FALSE, isext, ofmt, report_error); } else if (output_ins.operands == 2 && (output_ins.oprs[0].type & IMMEDIATE) && (output_ins.oprs[0].type & COLON) && output_ins.oprs[0].segment == NO_SEG && output_ins.oprs[0].wrt == NO_SEG && (output_ins.oprs[1].type & IMMEDIATE) && output_ins.oprs[1].segment == NO_SEG && output_ins.oprs[1].wrt == NO_SEG) { def_label (output_ins.label, output_ins.oprs[0].offset | SEG_ABS, output_ins.oprs[1].offset, NULL, FALSE, FALSE, ofmt, report_error); } else report_error(ERR_NONFATAL, "bad syntax for EQU"); } } else { /* pass == 2 */ /* * Special `..' EQUs get processed here, except * `..@' macro processor EQUs which are done above. */ if (output_ins.label[0] == '.' && output_ins.label[1] == '.' && output_ins.label[2] != '@') { if (output_ins.operands == 1 && (output_ins.oprs[0].type & IMMEDIATE)) { define_label (output_ins.label, output_ins.oprs[0].segment, output_ins.oprs[0].offset, NULL, FALSE, FALSE, ofmt, report_error); } else if (output_ins.operands == 2 && (output_ins.oprs[0].type & IMMEDIATE) && (output_ins.oprs[0].type & COLON) && output_ins.oprs[0].segment == NO_SEG && (output_ins.oprs[1].type & IMMEDIATE) && output_ins.oprs[1].segment == NO_SEG) { define_label (output_ins.label, output_ins.oprs[0].offset | SEG_ABS, output_ins.oprs[1].offset, NULL, FALSE, FALSE, ofmt, report_error); } else report_error(ERR_NONFATAL, "bad syntax for EQU"); } } /* pass == 2 */ } else { /* instruction isn't an EQU */ if (pass1 == 1) { long l = insn_size (location.segment, offs, sb, cpu, &output_ins, report_error); /* if (using_debug_info) && output_ins.opcode != -1)*/ if (using_debug_info) /* fbk 03/25/01 */ { /* this is done here so we can do debug type info */ long typeinfo = TYS_ELEMENTS(output_ins.operands); switch (output_ins.opcode) { case I_RESB: typeinfo = TYS_ELEMENTS(output_ins.oprs[0].offset) | TY_BYTE; break; case I_RESW: typeinfo = TYS_ELEMENTS(output_ins.oprs[0].offset) | TY_WORD; break; case I_RESD: typeinfo = TYS_ELEMENTS(output_ins.oprs[0].offset) | TY_DWORD; break; case I_RESQ: typeinfo = TYS_ELEMENTS(output_ins.oprs[0].offset) | TY_QWORD; break; case I_REST: typeinfo = TYS_ELEMENTS(output_ins.oprs[0].offset) | TY_TBYTE; break; case I_DB: typeinfo |= TY_BYTE; break; case I_DW: typeinfo |= TY_WORD; break; case I_DD: if (output_ins.eops_float) typeinfo |= TY_FLOAT; else typeinfo |= TY_DWORD; break; case I_DQ: typeinfo |= TY_QWORD; break; case I_DT: typeinfo |= TY_TBYTE; break; default: typeinfo = TY_LABEL; } ofmt->current_dfmt->debug_typevalue(typeinfo); } if (l != -1) { offs += l; SET_CURR_OFFS (offs); } /* * else l == -1 => invalid instruction, which will be * flagged as an error on pass 2 */ } else { /* pass == 2 */ offs += assemble (location.segment, offs, sb, cpu, &output_ins, ofmt, report_error, &nasmlist); SET_CURR_OFFS (offs); } } /* not an EQU */ cleanup_insn (&output_ins); } nasm_free (line); location.offset = offs = GET_CURR_OFFS; } /* end while (line = preproc->getline... */ if (pass1==2 && global_offset_changed) report_error(ERR_NONFATAL, "phase error detected at end of assembly."); if (pass1 == 1) preproc->cleanup(1); if (pass1==1 && terminate_after_phase) { fclose(ofile); remove(outname); if (want_usage) usage(); exit (1); } pass_cnt++; if (pass>1 && !global_offset_changed) { pass0++; if (pass0==2) pass = pass_max - 1; } else if (!(optimizing>0)) pass0++; } /* for (pass=1; pass<=2; pass++) */ preproc->cleanup(0); nasmlist.cleanup(); #if 1 if (optimizing>0 && using_debug_info) /* -On and -g switches */ fprintf(stdout, "info:: assembly required 1+%d+1 passes\n", pass_cnt-2); #endif } /* exit from assemble_file (...) */ static int getkw (char *buf, char **value) { char *p, *q; /* allow leading spaces or tabs */ while (*buf==' ' || *buf=='\t') buf++; if (*buf!='[') return 0; p = buf; while (*p && *p != ']') p++; if (!*p) return 0; q = p++; while (*p && *p != ';') { if (!isspace(*p)) return 0; p++; } q[1] = '\0'; p = buf+1; while (*buf && *buf!=' ' && *buf!=']' && *buf!='\t') buf++; if (*buf==']') { *buf = '\0'; *value = buf; } else { *buf++ = '\0'; while (isspace(*buf)) buf++; /* beppu - skip leading whitespace */ *value = buf; while (*buf!=']') buf++; *buf++ = '\0'; } #if 0 for (q=p; *q; q++) *q = tolower(*q); #endif if (!nasm_stricmp(p, "segment") || !nasm_stricmp(p, "section")) return 1; if (!nasm_stricmp(p, "extern")) return 2; if (!nasm_stricmp(p, "bits")) return 3; if (!nasm_stricmp(p, "global")) return 4; if (!nasm_stricmp(p, "common")) return 5; if (!nasm_stricmp(p, "absolute")) return 6; if (!nasm_stricmp(p, "debug")) return 7; if (!nasm_stricmp(p, "warning")) return 8; if (!nasm_stricmp(p, "cpu")) return 9; if (!nasm_stricmp(p, "list")) /* fbk 9/2/00 */ return 10; return -1; } static void report_error (int severity, char *fmt, ...) { va_list ap; /* * See if it's a suppressed warning. */ if ((severity & ERR_MASK) == ERR_WARNING && (severity & ERR_WARN_MASK) != 0 && suppressed[ (severity & ERR_WARN_MASK) >> ERR_WARN_SHR ]) return; /* and bail out if so */ /* * See if it's a pass-one only warning and we're not in pass one. */ if ((severity & ERR_PASS1) && pass0 == 2) return; if (severity & ERR_NOFILE) fputs ("nasm: ", error_file); else { char * currentfile = NULL; long lineno = 0; src_get (&lineno, ¤tfile); fprintf (error_file, "%s:%ld: ", currentfile, lineno); nasm_free (currentfile); } switch (severity & ERR_MASK) { case ERR_WARNING: fputs ("warning: ", error_file); break; case ERR_NONFATAL: fputs ("error: ", error_file); break; case ERR_FATAL: fputs ("fatal: ", error_file); break; case ERR_PANIC: fputs ("panic: ", error_file); break; case ERR_DEBUG: fputs("debug: ", error_file); break; } va_start (ap, fmt); vfprintf (error_file, fmt, ap); fputc ('\n', error_file); if (severity & ERR_USAGE) want_usage = TRUE; switch (severity & ERR_MASK) { case ERR_WARNING: case ERR_DEBUG: /* no further action, by definition */ break; case ERR_NONFATAL: /* terminate_after_phase = TRUE; *//**//* hack enables listing(!) on errors */ terminate_after_phase = TRUE; break; case ERR_FATAL: if (ofile) { fclose(ofile); remove(outname); } if (want_usage) usage(); exit(1); /* instantly die */ break; /* placate silly compilers */ case ERR_PANIC: fflush(NULL); /* abort(); */ /* halt, catch fire, and dump core */ exit(3); break; } } static void usage(void) { fputs("type `nasm -h' for help\n", error_file); } static void register_output_formats(void) { ofmt = ofmt_register (report_error); } #define BUF_DELTA 512 static FILE *no_pp_fp; static efunc no_pp_err; static ListGen *no_pp_list; static long no_pp_lineinc; static void no_pp_reset (char *file, int pass, efunc error, evalfunc eval, ListGen *listgen) { src_set_fname(nasm_strdup(file)); src_set_linnum(0); no_pp_lineinc = 1; no_pp_err = error; no_pp_fp = fopen(file, "r"); if (!no_pp_fp) no_pp_err (ERR_FATAL | ERR_NOFILE, "unable to open input file `%s'", file); no_pp_list = listgen; (void) pass; /* placate compilers */ (void) eval; /* placate compilers */ } static char *no_pp_getline (void) { char *buffer, *p, *q; int bufsize; bufsize = BUF_DELTA; buffer = nasm_malloc(BUF_DELTA); src_set_linnum(src_get_linnum() + no_pp_lineinc); while (1) { /* Loop to handle %line */ p = buffer; while (1) { /* Loop to handle long lines */ q = fgets(p, bufsize-(p-buffer), no_pp_fp); if (!q) break; p += strlen(p); if (p > buffer && p[-1] == '\n') break; if (p-buffer > bufsize-10) { int offset; offset = p - buffer; bufsize += BUF_DELTA; buffer = nasm_realloc(buffer, bufsize); p = buffer + offset; } } if (!q && p == buffer) { nasm_free (buffer); return NULL; } /* * Play safe: remove CRs, LFs and any spurious ^Zs, if any of * them are present at the end of the line. */ buffer[strcspn(buffer, "\r\n\032")] = '\0'; if (!strncmp(buffer, "%line", 5)) { long ln; int li; char *nm = nasm_malloc(strlen(buffer)); if (sscanf(buffer+5, "%ld+%d %s", &ln, &li, nm) == 3) { nasm_free( src_set_fname(nm) ); src_set_linnum(ln); no_pp_lineinc = li; continue; } nasm_free(nm); } break; } no_pp_list->line (LIST_READ, buffer); return buffer; } static void no_pp_cleanup (int pass) { fclose(no_pp_fp); } static unsigned long get_cpu (char *value) { if (!strcmp(value, "8086")) return IF_8086; if (!strcmp(value, "186")) return IF_186; if (!strcmp(value, "286")) return IF_286; if (!strcmp(value, "386")) return IF_386; if (!strcmp(value, "486")) return IF_486; if (!strcmp(value, "586") || !nasm_stricmp(value, "pentium") ) return IF_PENT; if (!strcmp(value, "686") || !nasm_stricmp(value, "ppro") || !nasm_stricmp(value, "p2") ) return IF_P6; if (!nasm_stricmp(value, "p3") || !nasm_stricmp(value, "katmai") ) return IF_KATMAI; if (!nasm_stricmp(value, "p4") || /* is this right? -- jrc */ !nasm_stricmp(value, "willamette") ) return IF_WILLAMETTE; report_error (pass0<2 ? ERR_NONFATAL : ERR_FATAL, "unknown 'cpu' type"); return IF_PLEVEL; /* the maximum level */ } static int get_bits (char *value) { int i; if ((i = atoi(value)) == 16) return i; /* set for a 16-bit segment */ else if (i == 32) { if (cpu < IF_386) { report_error(ERR_NONFATAL, "cannot specify 32-bit segment on processor below a 386"); i = 16; } } else { report_error(pass0<2 ? ERR_NONFATAL : ERR_FATAL, "`%s' is not a valid segment size; must be 16 or 32", value); i = 16; } return i; } /* end of nasm.c */