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f0ceb1e122
nasm/asm/nasm.c
Chang S. Bae f0ceb1e122 assemble: Check global line limit 
Without the limit, the while loop opens to semi-infinite
that will exhaustively consume the heap space. Also, the
index value gets into the garbage.

https://bugzilla.nasm.us/show_bug.cgi?id=3392474

Reported-by : Dongliang Mu <mudongliangabcd@gmail.com>
Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
2018-05-05 23:44:33 +03:00

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/* ----------------------------------------------------------------------- *
*
* Copyright 1996-2018 The NASM Authors - All Rights Reserved
* See the file AUTHORS included with the NASM distribution for
* the specific copyright holders.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following
* conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* ----------------------------------------------------------------------- */
/*
* The Netwide Assembler main program module
*/
#include "compiler.h"
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <limits.h>
#include "nasm.h"
#include "nasmlib.h"
#include "error.h"
#include "saa.h"
#include "raa.h"
#include "float.h"
#include "stdscan.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"
#include "iflag.h"
#include "ver.h"
/*
* This is the maximum number of optimization passes to do. If we ever
* find a case where the optimizer doesn't naturally converge, we might
* have to drop this value so the assembler doesn't appear to just hang.
*/
#define MAX_OPTIMIZE (INT_MAX >> 1)
struct forwrefinfo { /* info held on forward refs. */
int lineno;
int operand;
};
static void parse_cmdline(int, char **, int);
static void assemble_file(const char *, StrList **);
static bool is_suppressed_warning(int severity);
static bool skip_this_pass(int severity);
static void nasm_verror_gnu(int severity, const char *fmt, va_list args);
static void nasm_verror_vc(int severity, const char *fmt, va_list args);
static void nasm_verror_common(int severity, const char *fmt, va_list args);
static void usage(void);
static bool using_debug_info, opt_verbose_info;
static const char *debug_format;
#ifndef ABORT_ON_PANIC
# define ABORT_ON_PANIC 0
#endif
static bool abort_on_panic = ABORT_ON_PANIC;
bool tasm_compatible_mode = false;
int pass0, passn;
static int pass1, pass2; /* XXX: Get rid of these, they are redundant */
int globalrel = 0;
int globalbnd = 0;
struct compile_time official_compile_time;
const char *inname;
const char *outname;
static const char *listname;
static const char *errname;
static int globallineno; /* for forward-reference tracking */
#define GLOBALLINENO_MAX INT32_MAX
/* static int pass = 0; */
const struct ofmt *ofmt = &OF_DEFAULT;
const struct ofmt_alias *ofmt_alias = NULL;
const struct dfmt *dfmt;
static FILE *error_file; /* Where to write error messages */
FILE *ofile = NULL;
int optimizing = MAX_OPTIMIZE; /* number of optimization passes to take */
static int cmd_sb = 16; /* by default */
iflag_t cpu;
static iflag_t cmd_cpu;
struct location location;
bool in_absolute; /* Flag we are in ABSOLUTE seg */
struct location absolute; /* Segment/offset inside ABSOLUTE */
static struct RAA *offsets;
static struct SAA *forwrefs; /* keep track of forward references */
static const struct forwrefinfo *forwref;
static const struct preproc_ops *preproc;
#define OP_NORMAL (1u << 0)
#define OP_PREPROCESS (1u << 1)
#define OP_DEPEND (1u << 2)
static unsigned int operating_mode;
/* Dependency flags */
static bool depend_emit_phony = false;
static bool depend_missing_ok = false;
static const char *depend_target = NULL;
static const char *depend_file = NULL;
StrList *depend_list;
static bool want_usage;
static bool terminate_after_phase;
bool user_nolist = false;
static char *quote_for_pmake(const char *str);
static char *quote_for_wmake(const char *str);
static char *(*quote_for_make)(const char *) = quote_for_pmake;
static int64_t get_curr_offs(void)
{
return in_absolute ? absolute.offset : raa_read(offsets, location.segment);
}
static void set_curr_offs(int64_t l_off)
{
if (in_absolute)
absolute.offset = l_off;
else
offsets = raa_write(offsets, location.segment, l_off);
}
static void nasm_fputs(const char *line, FILE * outfile)
{
if (outfile) {
fputs(line, outfile);
putc('\n', outfile);
} else
puts(line);
}
static void define_macros_early(void)
{
const struct compile_time * const oct = &official_compile_time;
char temp[128];
if (oct->have_local) {
strftime(temp, sizeof temp, "__DATE__=\"%Y-%m-%d\"", &oct->local);
preproc->pre_define(temp);
strftime(temp, sizeof temp, "__DATE_NUM__=%Y%m%d", &oct->local);
preproc->pre_define(temp);
strftime(temp, sizeof temp, "__TIME__=\"%H:%M:%S\"", &oct->local);
preproc->pre_define(temp);
strftime(temp, sizeof temp, "__TIME_NUM__=%H%M%S", &oct->local);
preproc->pre_define(temp);
}
if (oct->have_gm) {
strftime(temp, sizeof temp, "__UTC_DATE__=\"%Y-%m-%d\"", &oct->gm);
preproc->pre_define(temp);
strftime(temp, sizeof temp, "__UTC_DATE_NUM__=%Y%m%d", &oct->gm);
preproc->pre_define(temp);
strftime(temp, sizeof temp, "__UTC_TIME__=\"%H:%M:%S\"", &oct->gm);
preproc->pre_define(temp);
strftime(temp, sizeof temp, "__UTC_TIME_NUM__=%H%M%S", &oct->gm);
preproc->pre_define(temp);
}
if (oct->have_posix) {
snprintf(temp, sizeof temp, "__POSIX_TIME__=%"PRId64, oct->posix);
preproc->pre_define(temp);
}
}
static void define_macros_late(void)
{
char temp[128];
/*
* In case if output format is defined by alias
* we have to put shortname of the alias itself here
* otherwise ABI backward compatibility gets broken.
*/
snprintf(temp, sizeof(temp), "__OUTPUT_FORMAT__=%s",
ofmt_alias ? ofmt_alias->shortname : ofmt->shortname);
preproc->pre_define(temp);
}
static void emit_dependencies(StrList *list)
{
FILE *deps;
int linepos, len;
StrList *l, *nl;
bool wmake = (quote_for_make == quote_for_wmake);
const char *wrapstr, *nulltarget;
wrapstr = wmake ? " &\n " : " \\\n ";
nulltarget = wmake ? "\t%null\n" : "";
if (depend_file && strcmp(depend_file, "-")) {
deps = nasm_open_write(depend_file, NF_TEXT);
if (!deps) {
nasm_error(ERR_NONFATAL|ERR_NOFILE|ERR_USAGE,
"unable to write dependency file `%s'", depend_file);
return;
}
} else {
deps = stdout;
}
linepos = fprintf(deps, "%s :", depend_target);
list_for_each(l, list) {
char *file = quote_for_make(l->str);
len = strlen(file);
if (linepos + len > 62 && linepos > 1) {
fputs(wrapstr, deps);
linepos = 1;
}
fprintf(deps, " %s", file);
linepos += len+1;
nasm_free(file);
}
fprintf(deps, "\n\n");
list_for_each_safe(l, nl, list) {
if (depend_emit_phony) {
char *file = quote_for_make(l->str);
fprintf(deps, "%s :\n%s\n", file, nulltarget);
nasm_free(file);
}
nasm_free(l);
}
if (deps != stdout)
fclose(deps);
}
/* Convert a struct tm to a POSIX-style time constant */
static int64_t make_posix_time(const struct tm *tm)
{
int64_t t;
int64_t y = tm->tm_year;
/* See IEEE 1003.1:2004, section 4.14 */
t = (y-70)*365 + (y-69)/4 - (y-1)/100 + (y+299)/400;
t += tm->tm_yday;
t *= 24;
t += tm->tm_hour;
t *= 60;
t += tm->tm_min;
t *= 60;
t += tm->tm_sec;
return t;
}
static void timestamp(void)
{
struct compile_time * const oct = &official_compile_time;
const struct tm *tp, *best_gm;
time(&oct->t);
best_gm = NULL;
tp = localtime(&oct->t);
if (tp) {
oct->local = *tp;
best_gm = &oct->local;
oct->have_local = true;
}
tp = gmtime(&oct->t);
if (tp) {
oct->gm = *tp;
best_gm = &oct->gm;
oct->have_gm = true;
if (!oct->have_local)
oct->local = oct->gm;
} else {
oct->gm = oct->local;
}
if (best_gm) {
oct->posix = make_posix_time(best_gm);
oct->have_posix = true;
}
}
int main(int argc, char **argv)
{
StrList **depend_ptr;
timestamp();
iflag_set_default_cpu(&cpu);
iflag_set_default_cpu(&cmd_cpu);
pass0 = 0;
want_usage = terminate_after_phase = false;
nasm_set_verror(nasm_verror_gnu);
error_file = stderr;
tolower_init();
src_init();
offsets = raa_init();
forwrefs = saa_init((int32_t)sizeof(struct forwrefinfo));
preproc = &nasmpp;
operating_mode = OP_NORMAL;
parse_cmdline(argc, argv, 1);
if (terminate_after_phase) {
if (want_usage)
usage();
return 1;
}
/*
* Define some macros dependent on the runtime, but not
* on the command line (as those are scanned in cmdline pass 2.)
*/
preproc->init();
define_macros_early();
parse_cmdline(argc, argv, 2);
if (terminate_after_phase) {
if (want_usage)
usage();
return 1;
}
/* Save away the default state of warnings */
memcpy(warning_state_init, warning_state, sizeof warning_state);
if (!using_debug_info) {
/* No debug info, redirect to the null backend (empty stubs) */
dfmt = &null_debug_form;
} else if (!debug_format) {
/* Default debug format for this backend */
dfmt = ofmt->default_dfmt;
} else {
dfmt = dfmt_find(ofmt, debug_format);
if (!dfmt) {
nasm_fatal(ERR_NOFILE | ERR_USAGE,
"unrecognized debug format `%s' for"
" output format `%s'",
debug_format, ofmt->shortname);
}
}
if (ofmt->stdmac)
preproc->extra_stdmac(ofmt->stdmac);
/* no output file name? */
if (!outname)
outname = filename_set_extension(inname, ofmt->extension);
/* define some macros dependent of command-line */
define_macros_late();
depend_ptr = (depend_file || (operating_mode & OP_DEPEND)) ? &depend_list : NULL;
if (!depend_target)
depend_target = quote_for_make(outname);
if (operating_mode & OP_DEPEND) {
char *line;
if (depend_missing_ok)
preproc->include_path(NULL); /* "assume generated" */
preproc->reset(inname, 0, depend_ptr);
ofile = NULL;
while ((line = preproc->getline()))
nasm_free(line);
preproc->cleanup(0);
} else if (operating_mode & OP_PREPROCESS) {
char *line;
const char *file_name = NULL;
int32_t prior_linnum = 0;
int lineinc = 0;
if (outname) {
ofile = nasm_open_write(outname, NF_TEXT);
if (!ofile)
nasm_fatal(ERR_NOFILE,
"unable to open output file `%s'",
outname);
} else
ofile = NULL;
location.known = false;
/* pass = 1; */
preproc->reset(inname, 3, depend_ptr);
/* Revert all warnings to the default state */
memcpy(warning_state, warning_state_init, sizeof warning_state);
while ((line = preproc->getline())) {
/*
* We generate %line directives if needed for later programs
*/
int32_t 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 %"PRId32"+%d %s\n", linnum, lineinc,
file_name);
}
prior_linnum = linnum;
}
nasm_fputs(line, ofile);
nasm_free(line);
}
preproc->cleanup(0);
if (ofile)
fclose(ofile);
if (ofile && terminate_after_phase)
remove(outname);
ofile = NULL;
}
if (operating_mode & OP_NORMAL) {
ofile = nasm_open_write(outname, (ofmt->flags & OFMT_TEXT) ? NF_TEXT : NF_BINARY);
if (!ofile)
nasm_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();
dfmt->init();
assemble_file(inname, depend_ptr);
if (!terminate_after_phase) {
ofmt->cleanup();
cleanup_labels();
fflush(ofile);
if (ferror(ofile)) {
nasm_error(ERR_NONFATAL|ERR_NOFILE,
"write error on output file `%s'", outname);
terminate_after_phase = true;
}
}
if (ofile) {
fclose(ofile);
if (terminate_after_phase)
remove(outname);
ofile = NULL;
}
}
if (depend_list && !terminate_after_phase)
emit_dependencies(depend_list);
if (want_usage)
usage();
raa_free(offsets);
saa_free(forwrefs);
eval_cleanup();
stdscan_cleanup();
src_free();
return terminate_after_phase;
}
/*
* 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, bool *advance)
{
*advance = false;
if (p[2]) /* the parameter's in the option */
return nasm_skip_spaces(p + 2);
if (q && q[0]) {
*advance = true;
return q;
}
nasm_error(ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
"option `-%c' requires an argument", p[1]);
return NULL;
}
/*
* Copy a filename
*/
static void copy_filename(const char **dst, const char *src, const char *what)
{
if (*dst)
nasm_fatal(0, "more than one %s file specified: %s\n", what, src);
*dst = nasm_strdup(src);
}
/*
* Convert a string to a POSIX make-safe form
*/
static char *quote_for_pmake(const char *str)
{
const char *p;
char *os, *q;
size_t n = 1; /* Terminating zero */
size_t nbs = 0;
if (!str)
return NULL;
for (p = str; *p; p++) {
switch (*p) {
case ' ':
case '\t':
/* Convert N backslashes + ws -> 2N+1 backslashes + ws */
n += nbs + 2;
nbs = 0;
break;
case '$':
case '#':
nbs = 0;
n += 2;
break;
case '\\':
nbs++;
n++;
break;
default:
nbs = 0;
n++;
break;
}
}
/* Convert N backslashes at the end of filename to 2N backslashes */
if (nbs)
n += nbs;
os = q = nasm_malloc(n);
nbs = 0;
for (p = str; *p; p++) {
switch (*p) {
case ' ':
case '\t':
while (nbs--)
*q++ = '\\';
*q++ = '\\';
*q++ = *p;
break;
case '$':
*q++ = *p;
*q++ = *p;
nbs = 0;
break;
case '#':
*q++ = '\\';
*q++ = *p;
nbs = 0;
break;
case '\\':
*q++ = *p;
nbs++;
break;
default:
*q++ = *p;
nbs = 0;
break;
}
}
while (nbs--)
*q++ = '\\';
*q = '\0';
return os;
}
/*
* Convert a string to a Watcom make-safe form
*/
static char *quote_for_wmake(const char *str)
{
const char *p;
char *os, *q;
bool quote = false;
size_t n = 1; /* Terminating zero */
if (!str)
return NULL;
for (p = str; *p; p++) {
switch (*p) {
case ' ':
case '\t':
case '&':
quote = true;
n++;
break;
case '\"':
quote = true;
n += 2;
break;
case '$':
case '#':
n += 2;
break;
default:
n++;
break;
}
}
if (quote)
n += 2;
os = q = nasm_malloc(n);
if (quote)
*q++ = '\"';
for (p = str; *p; p++) {
switch (*p) {
case '$':
case '#':
*q++ = '$';
*q++ = *p;
break;
case '\"':
*q++ = *p;
*q++ = *p;
break;
default:
*q++ = *p;
break;
}
}
if (quote)
*q++ = '\"';
*q = '\0';
return os;
}
enum text_options {
OPT_BOGUS,
OPT_VERSION,
OPT_ABORT_ON_PANIC,
OPT_PREFIX,
OPT_POSTFIX
};
struct textargs {
const char *label;
enum text_options opt;
bool need_arg;
};
static const struct textargs textopts[] = {
{"v", OPT_VERSION, false},
{"version", OPT_VERSION, false},
{"abort-on-panic", OPT_ABORT_ON_PANIC, false},
{"prefix", OPT_PREFIX, true},
{"postfix", OPT_POSTFIX, true},
{NULL, OPT_BOGUS, false}
};
static void show_version(void)
{
printf("NASM version %s compiled on %s%s\n",
nasm_version, nasm_date, nasm_compile_options);
exit(0);
}
static bool stopoptions = false;
static bool process_arg(char *p, char *q, int pass)
{
char *param;
int i;
bool advance = false;
if (!p || !p[0])
return false;
if (p[0] == '-' && !stopoptions) {
if (strchr("oOfpPdDiIlFXuUZwW", p[1])) {
/* These parameters take values */
if (!(param = get_param(p, q, &advance)))
return advance;
}
switch (p[1]) {
case 's':
if (pass == 1)
error_file = stdout;
break;
case 'o': /* output file */
if (pass == 2)
copy_filename(&outname, param, "output");
break;
case 'f': /* output format */
if (pass == 1) {
ofmt = ofmt_find(param, &ofmt_alias);
if (!ofmt) {
nasm_fatal(ERR_NOFILE | ERR_USAGE,
"unrecognised output format `%s' - "
"use -hf for a list", param);
}
}
break;
case 'O': /* Optimization level */
if (pass == 2) {
int opt;
if (!*param) {
/* Naked -O == -Ox */
optimizing = MAX_OPTIMIZE;
} else {
while (*param) {
switch (*param) {
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
opt = strtoul(param, &param, 10);
/* -O0 -> optimizing == -1, 0.98 behaviour */
/* -O1 -> optimizing == 0, 0.98.09 behaviour */
if (opt < 2)
optimizing = opt - 1;
else
optimizing = opt;
break;
case 'v':
case '+':
param++;
opt_verbose_info = true;
break;
case 'x':
param++;
optimizing = MAX_OPTIMIZE;
break;
default:
nasm_fatal(0,
"unknown optimization option -O%c\n",
*param);
break;
}
}
if (optimizing > MAX_OPTIMIZE)
optimizing = MAX_OPTIMIZE;
}
}
break;
case 'p': /* pre-include */
case 'P':
if (pass == 2)
preproc->pre_include(param);
break;
case 'd': /* pre-define */
case 'D':
if (pass == 2)
preproc->pre_define(param);
break;
case 'u': /* un-define */
case 'U':
if (pass == 2)
preproc->pre_undefine(param);
break;
case 'i': /* include search path */
case 'I':
if (pass == 2)
preproc->include_path(param);
break;
case 'l': /* listing file */
if (pass == 2)
copy_filename(&listname, param, "listing");
break;
case 'Z': /* error messages file */
if (pass == 1)
copy_filename(&errname, param, "error");
break;
case 'F': /* specify debug format */
if (pass == 2) {
using_debug_info = true;
debug_format = param;
}
break;
case 'X': /* specify error reporting format */
if (pass == 1) {
if (nasm_stricmp("vc", param) == 0)
nasm_set_verror(nasm_verror_vc);
else if (nasm_stricmp("gnu", param) == 0)
nasm_set_verror(nasm_verror_gnu);
else
nasm_fatal(ERR_NOFILE | ERR_USAGE,
"unrecognized error reporting format `%s'",
param);
}
break;
case 'g':
if (pass == 2) {
using_debug_info = true;
if (p[2])
debug_format = nasm_skip_spaces(p + 2);
}
break;
case 'h':
printf
("usage: nasm [-@ response file] [-o outfile] [-f format] "
"[-l listfile]\n"
" [options...] [--] filename\n"
" or nasm -v (or --v) for version info\n\n"
" -t assemble in SciTech TASM compatible mode\n");
printf
(" -E (or -e) preprocess only (writes output to stdout by default)\n"
" -a don't preprocess (assemble only)\n"
" -M generate Makefile dependencies on stdout\n"
" -MG d:o, missing files assumed generated\n"
" -MF <file> set Makefile dependency file\n"
" -MD <file> assemble and generate dependencies\n"
" -MT <file> dependency target name\n"
" -MQ <file> dependency target name (quoted)\n"
" -MP emit phony target\n\n"
" -Z<file> redirect error messages to file\n"
" -s redirect error messages to stdout\n\n"
" -g generate debugging information\n\n"
" -F format select a debugging format\n\n"
" -gformat same as -g -F format\n\n"
" -o outfile write output to an outfile\n\n"
" -f format select an output format\n\n"
" -l listfile write listing to a listfile\n\n"
" -I<path> adds a pathname to the include file path\n");
printf
(" -O<digit> optimize branch offsets\n"
" -O0: No optimization\n"
" -O1: Minimal optimization\n"
" -Ox: Multipass optimization (default)\n\n"
" -P<file> pre-includes a file\n"
" -D<macro>[=<value>] pre-defines a macro\n"
" -U<macro> undefines a macro\n"
" -X<format> specifies error reporting format (gnu or vc)\n"
" -w+foo enables warning foo (equiv. -Wfoo)\n"
" -w-foo disable warning foo (equiv. -Wno-foo)\n\n"
" -w[+-]error[=foo] can be used to promote warnings to errors\n"
" -h show invocation summary and exit\n\n"
"--prefix,--postfix\n"
" these options prepend or append the given string\n"
" to all extern and global variables\n"
"\n"
"Response files should contain command line parameters,\n"
"one per line.\n"
"\n"
"Warnings for the -W/-w options:\n");
for (i = 0; i <= ERR_WARN_ALL; i++)
printf(" %-23s %s%s\n",
warnings[i].name, warnings[i].help,
i == ERR_WARN_ALL ? "\n" :
warnings[i].enabled ? " (default on)" :
" (default off)");
if (p[2] == 'f') {
printf("valid output formats for -f are"
" (`*' denotes default):\n");
ofmt_list(ofmt, stdout);
} else {
printf("For 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 't':
if (pass == 2)
tasm_compatible_mode = true;
break;
case 'v':
show_version();
break;
case 'e': /* preprocess only */
case 'E':
if (pass == 1)
operating_mode = OP_PREPROCESS;
break;
case 'a': /* assemble only - don't preprocess */
if (pass == 1)
preproc = &preproc_nop;
break;
case 'w':
case 'W':
if (pass == 2) {
if (!set_warning_status(param)) {
nasm_error(ERR_WARNING|ERR_NOFILE|ERR_WARN_UNK_WARNING,
"unknown warning option: %s", param);
}
}
break;
case 'M':
if (pass == 1) {
switch (p[2]) {
case 'W':
quote_for_make = quote_for_wmake;
break;
case 'D':
case 'F':
case 'T':
case 'Q':
advance = true;
break;
default:
break;
}
} else {
switch (p[2]) {
case 0:
operating_mode = OP_DEPEND;
break;
case 'G':
operating_mode = OP_DEPEND;
depend_missing_ok = true;
break;
case 'P':
depend_emit_phony = true;
break;
case 'D':
operating_mode = OP_NORMAL;
depend_file = q;
advance = true;
break;
case 'F':
depend_file = q;
advance = true;
break;
case 'T':
depend_target = q;
advance = true;
break;
case 'Q':
depend_target = quote_for_make(q);
advance = true;
break;
case 'W':
/* handled in pass 1 */
break;
default:
nasm_error(ERR_NONFATAL|ERR_NOFILE|ERR_USAGE,
"unknown dependency option `-M%c'", p[2]);
break;
}
}
if (advance && (!q || !q[0])) {
nasm_error(ERR_NONFATAL|ERR_NOFILE|ERR_USAGE,
"option `-M%c' requires a parameter", p[2]);
break;
}
break;
case '-':
{
const struct textargs *tx;
if (p[2] == 0) { /* -- => stop processing options */
stopoptions = true;
break;
}
for (tx = textopts; tx->label; tx++) {
if (!nasm_stricmp(p + 2, tx->label))
break;
}
if (tx->need_arg) {
if (!q) {
nasm_error(ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
"option `--%s' requires an argument",
p + 2);
break;
}
advance = true;
}
switch (tx->opt) {
case OPT_VERSION:
show_version();
break;
case OPT_ABORT_ON_PANIC:
abort_on_panic = true;
break;
case OPT_PREFIX:
if (pass == 2)
strlcpy(lprefix, q, PREFIX_MAX);
break;
case OPT_POSTFIX:
if (pass == 2)
strlcpy(lpostfix, q, POSTFIX_MAX);
break;
case OPT_BOGUS:
nasm_error(ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
"unrecognized option `--%s'", p + 2);
break;
default:
panic();
}
break;
}
default:
nasm_error(ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
"unrecognised option `-%c'", p[1]);
break;
}
} else if (pass == 2) {
/* In theory we could allow multiple input files... */
copy_filename(&inname, p, "input");
}
return advance;
}
#define ARG_BUF_DELTA 128
static void process_respfile(FILE * rfile, int pass)
{
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, pass);
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 && nasm_isspace(p[-1]))
*--p = '\0';
p = nasm_skip_spaces(buffer);
if (process_arg(prevarg, p, pass))
*p = '\0';
if ((int) strlen(p) > prevargsize - 10) {
prevargsize += ARG_BUF_DELTA;
prevarg = nasm_realloc(prevarg, prevargsize);
}
strncpy(prevarg, p, prevargsize);
}
}
/* 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, int pass)
{
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, pass))
arg = NULL;
}
if (arg)
process_arg(arg, NULL, pass);
}
static void process_response_file(const char *file, int pass)
{
char str[2048];
FILE *f = nasm_open_read(file, NF_TEXT);
if (!f) {
perror(file);
exit(-1);
}
while (fgets(str, sizeof str, f)) {
process_args(str, pass);
}
fclose(f);
}
static void parse_cmdline(int argc, char **argv, int pass)
{
FILE *rfile;
char *envreal, *envcopy = NULL, *p;
int i;
/* Initialize all the warnings to their default state */
for (i = 0; i < ERR_WARN_ALL; i++) {
warning_state_init[i] = warning_state[i] =
warnings[i].enabled ? WARN_ST_ENABLED : 0;
}
/*
* First, process the NASMENV environment variable.
*/
envreal = getenv("NASMENV");
if (envreal) {
envcopy = nasm_strdup(envreal);
process_args(envcopy, pass);
nasm_free(envcopy);
}
/*
* Now process the actual command line.
*/
while (--argc) {
bool advance;
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.
*/
process_response_file(argv[0]+1, pass);
argc--;
argv++;
}
if (!stopoptions && argv[0][0] == '-' && argv[0][1] == '@') {
p = get_param(argv[0], argc > 1 ? argv[1] : NULL, &advance);
if (p) {
rfile = nasm_open_read(p, NF_TEXT);
if (rfile) {
process_respfile(rfile, pass);
fclose(rfile);
} else
nasm_error(ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
"unable to open response file `%s'", p);
}
} else
advance = process_arg(argv[0], argc > 1 ? argv[1] : NULL, pass);
argv += advance, argc -= advance;
}
/*
* Look for basic command line typos. This definitely doesn't
* catch all errors, but it might help cases of fumbled fingers.
*/
if (pass != 2)
return;
if (!inname)
nasm_fatal(ERR_NOFILE | ERR_USAGE, "no input file specified");
else if ((errname && !strcmp(inname, errname)) ||
(outname && !strcmp(inname, outname)) ||
(listname && !strcmp(inname, listname)) ||
(depend_file && !strcmp(inname, depend_file)))
nasm_fatal(ERR_USAGE, "will not overwrite input file");
if (errname) {
error_file = nasm_open_write(errname, NF_TEXT);
if (!error_file) {
error_file = stderr; /* Revert to default! */
nasm_fatal(ERR_NOFILE | ERR_USAGE,
"cannot open file `%s' for error messages",
errname);
}
}
}
static void assemble_file(const char *fname, StrList **depend_ptr)
{
char *line;
insn output_ins;
int i;
int64_t offs;
int pass_max;
uint64_t prev_offset_changed;
unsigned int stall_count = 0; /* Make sure we make forward progress... */
switch (cmd_sb) {
case 16:
break;
case 32:
if (!iflag_cpu_level_ok(&cmd_cpu, IF_386))
nasm_fatal(0, "command line: 32-bit segment size requires a higher cpu");
break;
case 64:
if (!iflag_cpu_level_ok(&cmd_cpu, IF_X86_64))
nasm_fatal(0, "command line: 64-bit segment size requires a higher cpu");
break;
default:
panic();
break;
}
pass_max = prev_offset_changed = (INT_MAX >> 1) + 2; /* Almost unlimited */
for (passn = 1; pass0 <= 2; passn++) {
ldfunc def_label;
pass1 = pass0 == 2 ? 2 : 1; /* 1, 1, 1, ..., 1, 2 */
pass2 = passn > 1 ? 2 : 1; /* 1, 2, 2, ..., 2, 2 */
/* pass0 0, 0, 0, ..., 1, 2 */
def_label = passn > 1 ? redefine_label : define_label;
globalbits = cmd_sb; /* set 'bits' to command line default */
cpu = cmd_cpu;
if (pass0 == 2) {
lfmt->init(listname);
} else if (passn == 1 && listname) {
/* Remove the list file in case we die before the output pass */
remove(listname);
}
in_absolute = false;
global_offset_changed = 0; /* set by redefine_label */
location.segment = ofmt->section(NULL, pass2, &globalbits);
if (passn > 1) {
saa_rewind(forwrefs);
forwref = saa_rstruct(forwrefs);
raa_free(offsets);
offsets = raa_init();
}
preproc->reset(fname, pass1, pass1 == 2 ? depend_ptr : NULL);
/* Revert all warnings to the default state */
memcpy(warning_state, warning_state_init, sizeof warning_state);
globallineno = 0;
if (passn == 1)
location.known = true;
location.offset = offs = get_curr_offs();
while ((line = preproc->getline())) {
if (globallineno++ == GLOBALLINENO_MAX)
nasm_error(ERR_FATAL,
"overall line number reaches the maximum %d\n",
GLOBALLINENO_MAX);
/*
* Here we parse our directives; this is not handled by the
* main parser.
*/
if (process_directives(line))
goto end_of_line; /* Just do final cleanup */
/* Not a directive, or even something that starts with [ */
parse_line(pass1, line, &output_ins, def_label);
if (optimizing > 0) {
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 (output_ins.forw_ref) {
if (passn == 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;
}
}
}
}
}
/* 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)
nasm_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) {
bool 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);
} 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);
} else
nasm_error(ERR_NONFATAL,
"bad syntax for EQU");
}
} else {
/*
* 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);
} 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);
} else
nasm_error(ERR_NONFATAL,
"bad syntax for EQU");
}
}
} else { /* instruction isn't an EQU */
int32_t n;
nasm_assert(output_ins.times >= 0);
for (n = 1; n <= output_ins.times; n++) {
if (pass1 == 1) {
int64_t l = insn_size(location.segment, offs,
globalbits, &output_ins);
/* 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 */
int32_t 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_RESO:
typeinfo =
TYS_ELEMENTS(output_ins.oprs[0].offset) | TY_OWORD;
break;
case I_RESY:
typeinfo =
TYS_ELEMENTS(output_ins.oprs[0].offset) | TY_YWORD;
break;
case I_RESZ:
typeinfo =
TYS_ELEMENTS(output_ins.oprs[0].offset) | TY_ZWORD;
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;
case I_DO:
typeinfo |= TY_OWORD;
break;
case I_DY:
typeinfo |= TY_YWORD;
break;
case I_DZ:
typeinfo |= TY_ZWORD;
break;
default:
typeinfo = TY_LABEL;
break;
}
dfmt->debug_typevalue(typeinfo);
}
/*
* For INCBIN, let the code in assemble
* handle TIMES, so we don't have to read the
* input file over and over.
*/
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 {
if (n == 2)
lfmt->uplevel(LIST_TIMES);
offs += assemble(location.segment, offs,
globalbits, &output_ins);
set_curr_offs(offs);
}
} /* not an EQU */
}
if (output_ins.times > 1)
lfmt->downlevel(LIST_TIMES);
cleanup_insn(&output_ins);
end_of_line:
nasm_free(line);
location.offset = offs = get_curr_offs();
} /* end while (line = preproc->getline... */
if (pass0 == 2 && global_offset_changed && !terminate_after_phase)
nasm_error(ERR_NONFATAL,
"phase error detected at end of assembly.");
if (pass1 == 1)
preproc->cleanup(1);
if ((passn > 1 && !global_offset_changed) || pass0 == 2) {
pass0++;
} else if (global_offset_changed &&
global_offset_changed < prev_offset_changed) {
prev_offset_changed = global_offset_changed;
stall_count = 0;
} else {
stall_count++;
}
if (terminate_after_phase)
break;
if ((stall_count > 997U) || (passn >= pass_max)) {
/* We get here if the labels don't converge
* Example: FOO equ FOO + 1
*/
nasm_error(ERR_NONFATAL,
"Can't find valid values for all labels "
"after %d passes, giving up.", passn);
nasm_error(ERR_NONFATAL,
"Possible causes: recursive EQUs, macro abuse.");
break;
}
}
preproc->cleanup(0);
lfmt->cleanup();
if (!terminate_after_phase && opt_verbose_info) {
/* -On and -Ov switches */
fprintf(stdout, "info: assembly required 1+%d+1 passes\n", passn-3);
}
}
/**
* gnu style error reporting
* This function prints an error message to error_file in the
* style used by GNU. An example would be:
* file.asm:50: error: blah blah blah
* where file.asm is the name of the file, 50 is the line number on
* which the error occurs (or is detected) and "error:" is one of
* the possible optional diagnostics -- it can be "error" or "warning"
* or something else. Finally the line terminates with the actual
* error message.
*
* @param severity the severity of the warning or error
* @param fmt the printf style format string
*/
static void nasm_verror_gnu(int severity, const char *fmt, va_list ap)
{
const char *currentfile = NULL;
int32_t lineno = 0;
if (is_suppressed_warning(severity))
return;
if (!(severity & ERR_NOFILE)) {
src_get(&lineno, &currentfile);
if (!currentfile || (severity & ERR_TOPFILE)) {
currentfile = inname[0] ? inname : outname[0] ? outname : NULL;
lineno = 0;
}
}
if (!skip_this_pass(severity)) {
if (!lineno)
fprintf(error_file, "%s:", currentfile ? currentfile : "nasm");
else
fprintf(error_file, "%s:%"PRId32": ", currentfile, lineno);
}
nasm_verror_common(severity, fmt, ap);
}
/**
* MS style error reporting
* This function prints an error message to error_file in the
* style used by Visual C and some other Microsoft tools. An example
* would be:
* file.asm(50) : error: blah blah blah
* where file.asm is the name of the file, 50 is the line number on
* which the error occurs (or is detected) and "error:" is one of
* the possible optional diagnostics -- it can be "error" or "warning"
* or something else. Finally the line terminates with the actual
* error message.
*
* @param severity the severity of the warning or error
* @param fmt the printf style format string
*/
static void nasm_verror_vc(int severity, const char *fmt, va_list ap)
{
const char *currentfile = NULL;
int32_t lineno = 0;
if (is_suppressed_warning(severity))
return;
if (!(severity & ERR_NOFILE))
src_get(&lineno, &currentfile);
if (!skip_this_pass(severity)) {
if (currentfile) {
fprintf(error_file, "%s(%"PRId32") : ", currentfile, lineno);
} else {
fputs("nasm: ", error_file);
}
}
nasm_verror_common(severity, fmt, ap);
}
/*
* check to see if this is a suppressable warning
*/
static inline bool is_valid_warning(int severity)
{
/* Not a warning at all */
if ((severity & ERR_MASK) != ERR_WARNING)
return false;
return WARN_IDX(severity) < ERR_WARN_ALL;
}
/**
* check for suppressed warning
* checks for suppressed warning or pass one only warning and we're
* not in pass 1
*
* @param severity the severity of the warning or error
* @return true if we should abort error/warning printing
*/
static bool is_suppressed_warning(int severity)
{
/* Might be a warning but suppresed explicitly */
if (is_valid_warning(severity))
return !(warning_state[WARN_IDX(severity)] & WARN_ST_ENABLED);
else
return false;
}
static bool warning_is_error(int severity)
{
if (is_valid_warning(severity))
return !!(warning_state[WARN_IDX(severity)] & WARN_ST_ERROR);
else
return false;
}
static bool skip_this_pass(int severity)
{
/*
* See if it's a pass-specific error or warning which should be skipped.
* We cannot skip errors stronger than ERR_NONFATAL as by definition
* they cannot be resumed from.
*/
if ((severity & ERR_MASK) > ERR_NONFATAL)
return false;
/*
* passn is 1 on the very first pass only.
* pass0 is 2 on the code-generation (final) pass only.
* These are the passes we care about in this case.
*/
return (((severity & ERR_PASS1) && passn != 1) ||
((severity & ERR_PASS2) && pass0 != 2));
}
/**
* common error reporting
* This is the common back end of the error reporting schemes currently
* implemented. It prints the nature of the warning and then the
* specific error message to error_file and may or may not return. It
* doesn't return if the error severity is a "panic" or "debug" type.
*
* @param severity the severity of the warning or error
* @param fmt the printf style format string
*/
static void nasm_verror_common(int severity, const char *fmt, va_list args)
{
char msg[1024];
const char *pfx;
switch (severity & (ERR_MASK|ERR_NO_SEVERITY)) {
case ERR_WARNING:
pfx = "warning: ";
break;
case ERR_NONFATAL:
pfx = "error: ";
break;
case ERR_FATAL:
pfx = "fatal: ";
break;
case ERR_PANIC:
pfx = "panic: ";
break;
case ERR_DEBUG:
pfx = "debug: ";
break;
default:
pfx = "";
break;
}
vsnprintf(msg, sizeof msg - 64, fmt, args);
if (is_valid_warning(severity) && WARN_IDX(severity) != ERR_WARN_OTHER) {
char *p = strchr(msg, '\0');
snprintf(p, 64, " [-w+%s]", warnings[WARN_IDX(severity)].name);
}
if (!skip_this_pass(severity))
fprintf(error_file, "%s%s\n", pfx, msg);
/* Are we recursing from error_list_macros? */
if (severity & ERR_PP_LISTMACRO)
return;
/*
* Don't suppress this with skip_this_pass(), or we don't get
* pass1 or preprocessor warnings in the list file
*/
lfmt->error(severity, pfx, msg);
if (skip_this_pass(severity))
return;
if (severity & ERR_USAGE)
want_usage = true;
preproc->error_list_macros(severity);
switch (severity & ERR_MASK) {
case ERR_DEBUG:
/* no further action, by definition */
break;
case ERR_WARNING:
/* Treat warnings as errors */
if (warning_is_error(severity))
terminate_after_phase = true;
break;
case ERR_NONFATAL:
terminate_after_phase = true;
break;
case ERR_FATAL:
if (ofile) {
fclose(ofile);
remove(outname);
ofile = NULL;
}
if (want_usage)
usage();
exit(1); /* instantly die */
break; /* placate silly compilers */
case ERR_PANIC:
fflush(NULL);
if (abort_on_panic)
abort(); /* halt, catch fire, dump core/stop debugger */
if (ofile) {
fclose(ofile);
remove(outname);
ofile = NULL;
}
exit(3);
break;
}
}
static void usage(void)
{
fputs("type `nasm -h' for help\n", error_file);
}
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