nasm.c
资源名称:nasm-0.98.zip [点击查看]
上传用户:yuppie_zhu
上传日期:2007-01-08
资源大小:535k
文件大小:34k
源码类别:
编译器/解释器
开发平台:
C/C++
- /* 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 <stdio.h>
- #include <stdarg.h>
- #include <stdlib.h>
- #include <string.h>
- #include <ctype.h>
- #include "nasm.h"
- #include "nasmlib.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 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;
- 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;
- static struct ofmt *ofmt = NULL;
- static FILE *error_file; /* Where to write error messages */
- static FILE *ofile = NULL;
- static int sb = 16; /* by default */
- 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;
- /* used by error function to report location */
- /*
- * 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, FALSE
- };
- /*
- * The option names for the suppressible warnings. As before, entry
- * zero does nothing.
- */
- static char *suppressed_names[1+ERR_WARN_MAX] = {
- NULL, "macro-params", "orphan-labels", "number-overflow"
- };
- /*
- * 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",
- "labels alone on lines without trailing `:'",
- "numeric constants greater than 0xFFFFFFFF"
- };
- /*
- * 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 (void);
- static Preproc no_pp = {
- no_pp_reset,
- no_pp_getline,
- no_pp_cleanup
- };
- /*
- * get/set current offset...
- */
- #define get_curr_ofs (in_abs_seg?abs_offset:
- raa_read(offsets,location.segment))
- #define set_curr_ofs(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;
- 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)
- {
- 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);
- switch ( operating_mode ) {
- case op_depend:
- {
- char *line;
- preproc->reset (inname, 0, report_error, evaluate, &nasmlist);
- if (outname[0] == ' ')
- ofmt->filename (inname, outname, report_error);
- ofile = NULL;
- printf("%s: %s", outname, inname);
- while ( (line = preproc->getline()) )
- nasm_free (line);
- preproc->cleanup();
- 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;
- 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 %sn",
- linnum, lineinc, file_name);
- }
- prior_linnum = linnum;
- }
- nasm_fputs(line, ofile);
- nasm_free (line);
- }
- nasm_free(file_name);
- preproc->cleanup();
- 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;
- }
- 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 '-': /* -- => stop processing options */
- stopoptions = 1;
- break;
- case 's':
- error_file = stdout;
- break;
- case 'o': /* these parameters take values */
- case 'f':
- case 'p':
- case 'd':
- case 'D':
- 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]=='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, "wt");
- 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...] [--] filenamen"
- " or nasm -r for version infonn"
- " -e preprocess only (writes output to stdout by default)n"
- " -a don't preprocess (assemble only)n"
- " -M generate Makefile dependencies on stdoutnn"
- " -E<file> redirect error messages to filen"
- " -s redirect error messages to stdoutnn"
- " -g enable debug infon"
- " -F format select a debugging formatnn"
- " -I<path> adds a pathname to the include file pathn"
- " -P<file> pre-includes a filen"
- " -D<macro>[=<value>] pre-defines a macron"
- " -U<macro> undefines a macron"
- " -w+foo enables warnings about foo; -w-foo disables themn"
- "where foo can be:n");
- for (i=1; i<=ERR_WARN_MAX; i++)
- printf(" %-16s%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 <form> -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 'r':
- printf("NASM version %sn", NASM_VER);
- #ifdef DEBUG
- printf("Compiled with -DDEBUG on " __DATE__ "n");
- #endif
- 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;
- 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] = ' ';
- 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, "rn 32")]) = ' ';
- while (p > buffer && isspace(p[-1]))
- *--p = ' ';
- p = buffer;
- while (isspace(*p))
- p++;
- if (process_arg (prevarg, p))
- *p = ' ';
- if (strlen(p) > prevargsize-10) {
- prevargsize += ARG_BUF_DELTA;
- prevarg = nasm_realloc(prevarg, prevargsize);
- }
- strcpy (prevarg, p);
- }
- }
- static void parse_cmdline(int argc, char **argv)
- {
- FILE *rfile;
- char *envreal, *envcopy=NULL, *p, *q, *arg, *prevarg;
- char separator = ' ';
- *inname = *outname = *listname = ' ';
- /*
- * First, process the NASM environment variable.
- */
- envreal = getenv("NASM");
- arg = NULL;
- if (envreal) {
- envcopy = nasm_strdup(envreal);
- p = envcopy;
- if (*p && *p != '-')
- separator = *p++;
- while (*p) {
- q = p;
- while (*p && *p != separator) p++;
- while (*p == separator) *p++ = ' ';
- prevarg = arg;
- arg = q;
- if (process_arg (prevarg, arg))
- arg = NULL;
- }
- if (arg)
- process_arg (arg, NULL);
- nasm_free (envcopy);
- }
- /*
- * Now process the actual command line.
- */
- while (--argc)
- {
- int i;
- 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;
- /*
- * pass one
- */
- pass = 1;
- in_abs_seg = FALSE;
- location.segment = ofmt->section(NULL, pass, &sb);
- preproc->reset(fname, 1, report_error, evaluate, &nasmlist);
- globallineno = 0;
- location.known = TRUE;
- location.offset = offs = get_curr_ofs;
- 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, pass, &sb);
- if (seg == NO_SEG) {
- report_error (ERR_NONFATAL,
- "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 */
- 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++ = ' ';
- special = q;
- } else
- special = NULL;
- if (!is_extern(value)) { /* allow re-EXTERN to be ignored */
- declare_as_global (value, special, report_error);
- define_label (value, seg_alloc(), 0L, NULL, FALSE, TRUE,
- ofmt, report_error);
- }
- break;
- case 3: /* [BITS bits] */
- switch (atoi(value)) {
- case 16:
- case 32:
- sb = atoi(value);
- break;
- default:
- report_error(ERR_NONFATAL,
- "`%s' is not a valid argument to [BITS]",
- value);
- break;
- }
- break;
- case 4: /* [GLOBAL symbol:special] */
- if (*value == '$')
- value++; /* skip initial $ if present */
- 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++ = ' ';
- special = q;
- } else
- special = NULL;
- declare_as_global (value, special, report_error);
- break;
- case 5: /* [COMMON symbol size:special] */
- 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++ = ' ';
- q = p;
- while (*q && *q != ':')
- q++;
- if (*q == ':') {
- *q++ = ' ';
- 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");
- break;
- case 6: /* [ABSOLUTE address] */
- stdscan_reset();
- stdscan_bufptr = value;
- tokval.t_type = TOKEN_INVALID;
- e = evaluate(stdscan, NULL, &tokval, NULL, 1, report_error,
- NULL);
- if (e) {
- if (!is_reloc(e))
- report_error (ERR_NONFATAL, "cannot use non-"
- "relocatable expression as ABSOLUTE"
- " address");
- else {
- abs_seg = reloc_seg(e);
- abs_offset = reloc_value(e);
- }
- } else
- abs_offset = 0x100;/* don't go near zero in case of / */
- in_abs_seg = TRUE;
- location.segment = abs_seg;
- break;
- case 7:
- 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 DEBUG");
- break;
- }
- while (*p && isspace(*p)) p++;
- break;
- default:
- if (!ofmt->directive (line+1, value, 1))
- report_error (ERR_NONFATAL, "unrecognised directive [%s]",
- line+1);
- break;
- }
- }
- else /* it isn't a directive */
- {
- parse_line (1, line, &output_ins,
- report_error, evaluate, define_label);
- if (output_ins.forw_ref)
- {
- 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;
- }
- }
- }
- if (output_ins.opcode == I_EQU)
- {
- /*
- * 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;
- define_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)
- {
- 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");
- }
- }
- else /* instruction isn't an EQU */
- {
- long l = insn_size (location.segment, offs, sb,
- &output_ins, report_error);
- if (using_debug_info && output_ins.opcode != -1) {
- /* 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_ofs (offs);
- }
- /*
- * else l == -1 => invalid instruction, which will be
- * flagged as an error on pass 2
- */
- }
- cleanup_insn (&output_ins);
- }
- nasm_free (line);
- location.offset = offs = get_curr_ofs;
- }
- preproc->cleanup();
- if (terminate_after_phase) {
- fclose(ofile);
- remove(outname);
- if (want_usage)
- usage();
- exit (1);
- }
- /*
- * pass two
- */
- pass = 2;
- saa_rewind (forwrefs);
- if (*listname)
- nasmlist.init(listname, report_error);
- forwref = saa_rstruct (forwrefs);
- in_abs_seg = FALSE;
- location.segment = ofmt->section(NULL, pass, &sb);
- raa_free (offsets);
- offsets = raa_init();
- preproc->reset(fname, 2, report_error, evaluate, &nasmlist);
- globallineno = 0;
- location.offset = offs = get_curr_ofs;
- 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, pass, &sb);
- if (seg == NO_SEG) {
- report_error (ERR_PANIC,
- "invalid segment name on pass two");
- } else
- in_abs_seg = FALSE;
- location.segment = seg;
- break;
- case 2: /* [EXTERN label] */
- q = value;
- while (*q && *q != ':')
- q++;
- if (*q == ':') {
- *q++ = ' ';
- ofmt->symdef(value, 0L, 0L, 3, q);
- }
- break;
- case 3: /* [BITS bits] */
- switch (atoi(value)) {
- case 16:
- case 32:
- sb = atoi(value);
- break;
- default:
- report_error(ERR_PANIC,
- "invalid [BITS] value on pass two",
- value);
- break;
- }
- break;
- case 4: /* [GLOBAL symbol] */
- q = value;
- while (*q && *q != ':')
- q++;
- if (*q == ':') {
- *q++ = ' ';
- ofmt->symdef(value, 0L, 0L, 3, q);
- }
- break;
- case 5: /* [COMMON symbol size] */
- q = value;
- while (*q && *q != ':') {
- if (isspace(*q))
- *q = ' ';
- q++;
- }
- if (*q == ':') {
- *q++ = ' ';
- ofmt->symdef(value, 0L, 0L, 3, q);
- }
- break;
- case 6: /* [ABSOLUTE addr] */
- stdscan_reset();
- stdscan_bufptr = value;
- tokval.t_type = TOKEN_INVALID;
- e = evaluate(stdscan, NULL, &tokval, NULL, 2, report_error,
- NULL);
- if (e) {
- if (!is_reloc(e))
- report_error (ERR_PANIC, "non-reloc ABSOLUTE address"
- " in pass two");
- else {
- abs_seg = reloc_seg(e);
- abs_offset = reloc_value(e);
- }
- } else
- report_error (ERR_PANIC, "invalid ABSOLUTE address "
- "in pass two");
- in_abs_seg = TRUE;
- location.segment = abs_seg;
- break;
- case 7:
- 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 (ERR_PANIC,
- "identifier expected after DEBUG in pass 2");
- break;
- }
- while (*p && isspace(*p))
- p++;
- ofmt->current_dfmt->debug_directive (debugid, p);
- break;
- default:
- if (!ofmt->directive (line+1, value, 2))
- report_error (ERR_PANIC, "invalid directive on pass two");
- break;
- }
- }
- else /* not a directive */
- {
- parse_line (2, line, &output_ins,
- report_error, evaluate, redefine_label);
- 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;
- /*
- * 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.forw_ref &&
- output_ins.operands >= 2 &&
- (output_ins.oprs[1].opflags & OPFLAG_FORWARD))
- {
- output_ins.oprs[1].type &= ~ONENESS;
- }
- if (output_ins.opcode == I_EQU)
- {
- /*
- * 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");
- }
- }
- offs += assemble (location.segment, offs, sb,
- &output_ins, ofmt, report_error, &nasmlist);
- cleanup_insn (&output_ins);
- set_curr_ofs (offs);
- }
- nasm_free (line);
- location.offset = offs = get_curr_ofs;
- }
- preproc->cleanup();
- nasmlist.cleanup();
- }
- static int getkw (char *buf, char **value)
- {
- char *p, *q;
- 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] = ' ';
- p = buf+1;
- while (*buf && *buf!=' ' && *buf!=']' && *buf!='t')
- buf++;
- if (*buf==']') {
- *buf = ' ';
- *value = buf;
- } else {
- *buf++ = ' ';
- while (isspace(*buf)) buf++; /* beppu - skip leading whitespace */
- *value = buf;
- while (*buf!=']') buf++;
- *buf++ = ' ';
- }
- for (q=p; *q; q++)
- *q = tolower(*q);
- if (!strcmp(p, "segment") || !strcmp(p, "section"))
- return 1;
- if (!strcmp(p, "extern"))
- return 2;
- if (!strcmp(p, "bits"))
- return 3;
- if (!strcmp(p, "global"))
- return 4;
- if (!strcmp(p, "common"))
- return 5;
- if (!strcmp(p, "absolute"))
- return 6;
- if (!strcmp(p, "debug"))
- return 7;
- 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) && pass != 1)
- 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);
- }
- if ( (severity & ERR_MASK) == ERR_WARNING)
- fputs ("warning: ", error_file);
- else if ( (severity & ERR_MASK) == ERR_PANIC)
- fputs ("panic: ", error_file);
- 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:
- /* no further action, by definition */
- break;
- case ERR_NONFATAL:
- 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 */
- break;
- }
- }
- static void usage(void)
- {
- fputs("type `nasm -h' for helpn", 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, "rn 32")] = ' ';
- 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 (void)
- {
- fclose(no_pp_fp);
- }