int stdscan(void *private_data, struct tokenval *tv)
{
char ourcopy[MAX_KEYWORD + 1], *r, *s;
(void)private_data; /* Don't warn that this parameter is unused */
stdscan_bufptr = nasm_skip_spaces(stdscan_bufptr);
if (!*stdscan_bufptr)
return tv->t_type = TOKEN_EOS;
/* we have a token; either an id, a number or a char */
if (isidstart(*stdscan_bufptr) ||
(*stdscan_bufptr == '$' && isidstart(stdscan_bufptr[1]))) {
/* now we've got an identifier */
bool is_sym = false;
int token_type;
if (*stdscan_bufptr == '$') {
is_sym = true;
stdscan_bufptr++;
}
r = stdscan_bufptr++;
/* read the entire buffer to advance the buffer pointer but... */
while (isidchar(*stdscan_bufptr))
stdscan_bufptr++;
/* ... copy only up to IDLEN_MAX-1 characters */
tv->t_charptr = stdscan_copy(r, stdscan_bufptr - r < IDLEN_MAX ?
stdscan_bufptr - r : IDLEN_MAX - 1);
if (is_sym || stdscan_bufptr - r > MAX_KEYWORD)
return tv->t_type = TOKEN_ID; /* bypass all other checks */
for (s = tv->t_charptr, r = ourcopy; *s; s++)
*r++ = nasm_tolower(*s);
*r = '\0';
/* right, so we have an identifier sitting in temp storage. now,
* is it actually a register or instruction name, or what? */
token_type = nasm_token_hash(ourcopy, tv);
if (likely(!(tv->t_flag & TFLAG_BRC))) {
/* most of the tokens fall into this case */
return token_type;
} else {
return tv->t_type = TOKEN_ID;
}
} else if (*stdscan_bufptr == '$' && !isnumchar(stdscan_bufptr[1])) {
/*
* It's a $ sign with no following hex number; this must
* mean it's a Here token ($), evaluating to the current
* assembly location, or a Base token ($$), evaluating to
* the base of the current segment.
*/
stdscan_bufptr++;
if (*stdscan_bufptr == '$') {
stdscan_bufptr++;
return tv->t_type = TOKEN_BASE;
}
return tv->t_type = TOKEN_HERE;
} else if (isnumstart(*stdscan_bufptr)) { /* now we've got a number */
bool rn_error;
bool is_hex = false;
bool is_float = false;
bool has_e = false;
char c;
r = stdscan_bufptr;
if (*stdscan_bufptr == '$') {
stdscan_bufptr++;
is_hex = true;
}
for (;;) {
c = *stdscan_bufptr++;
if (!is_hex && (c == 'e' || c == 'E')) {
has_e = true;
if (*stdscan_bufptr == '+' || *stdscan_bufptr == '-') {
/*
* e can only be followed by +/- if it is either a
* prefixed hex number or a floating-point number
*/
is_float = true;
stdscan_bufptr++;
}
} else if (c == 'H' || c == 'h' || c == 'X' || c == 'x') {
is_hex = true;
} else if (c == 'P' || c == 'p') {
is_float = true;
if (*stdscan_bufptr == '+' || *stdscan_bufptr == '-')
stdscan_bufptr++;
} else if (isnumchar(c) || c == '_')
; /* just advance */
else if (c == '.')
is_float = true;
else
break;
}
stdscan_bufptr--; /* Point to first character beyond number */
if (has_e && !is_hex) {
/* 1e13 is floating-point, but 1e13h is not */
is_float = true;
}
if (is_float) {
tv->t_charptr = stdscan_copy(r, stdscan_bufptr - r);
return tv->t_type = TOKEN_FLOAT;
} else {
r = stdscan_copy(r, stdscan_bufptr - r);
tv->t_integer = readnum(r, &rn_error);
stdscan_pop();
if (rn_error) {
/* some malformation occurred */
return tv->t_type = TOKEN_ERRNUM;
}
tv->t_charptr = NULL;
return tv->t_type = TOKEN_NUM;
}
} else if (*stdscan_bufptr == '\'' || *stdscan_bufptr == '"' ||
*stdscan_bufptr == '`') {
/* a quoted string */
char start_quote = *stdscan_bufptr;
tv->t_charptr = stdscan_bufptr;
tv->t_inttwo = nasm_unquote(tv->t_charptr, &stdscan_bufptr);
if (*stdscan_bufptr != start_quote)
return tv->t_type = TOKEN_ERRSTR;
stdscan_bufptr++; /* Skip final quote */
return tv->t_type = TOKEN_STR;
} else if (*stdscan_bufptr == '{') {
/* now we've got a decorator */
int token_len;
stdscan_bufptr = nasm_skip_spaces(stdscan_bufptr);
r = ++stdscan_bufptr;
/*
* read the entire buffer to advance the buffer pointer
* {rn-sae}, {rd-sae}, {ru-sae}, {rz-sae} contain '-' in tokens.
*/
while (isbrcchar(*stdscan_bufptr))
stdscan_bufptr++;
token_len = stdscan_bufptr - r;
/* ... copy only up to DECOLEN_MAX-1 characters */
tv->t_charptr = stdscan_copy(r, token_len < DECOLEN_MAX ?
token_len : DECOLEN_MAX - 1);
stdscan_bufptr = nasm_skip_spaces(stdscan_bufptr);
/* if brace is not closed properly or token is too long */
if ((*stdscan_bufptr != '}') || (token_len > MAX_KEYWORD)) {
nasm_error(ERR_NONFATAL,
"invalid decorator token inside braces");
return tv->t_type = TOKEN_INVALID;
}
stdscan_bufptr++; /* skip closing brace */
for (s = tv->t_charptr, r = ourcopy; *s; s++)
*r++ = nasm_tolower(*s);
*r = '\0';
/* right, so we have a decorator sitting in temp storage. */
nasm_token_hash(ourcopy, tv);
/* handle tokens inside braces */
return stdscan_handle_brace(tv);
} else if (*stdscan_bufptr == ';') {
/* a comment has happened - stay */
return tv->t_type = TOKEN_EOS;
} else if (stdscan_bufptr[0] == '>' && stdscan_bufptr[1] == '>') {
stdscan_bufptr += 2;
return tv->t_type = TOKEN_SHR;
} else if (stdscan_bufptr[0] == '<' && stdscan_bufptr[1] == '<') {
stdscan_bufptr += 2;
return tv->t_type = TOKEN_SHL;
} else if (stdscan_bufptr[0] == '/' && stdscan_bufptr[1] == '/') {
stdscan_bufptr += 2;
return tv->t_type = TOKEN_SDIV;
} else if (stdscan_bufptr[0] == '%' && stdscan_bufptr[1] == '%') {
stdscan_bufptr += 2;
return tv->t_type = TOKEN_SMOD;
} else if (stdscan_bufptr[0] == '=' && stdscan_bufptr[1] == '=') {
stdscan_bufptr += 2;
return tv->t_type = TOKEN_EQ;
} else if (stdscan_bufptr[0] == '<' && stdscan_bufptr[1] == '>') {
stdscan_bufptr += 2;
return tv->t_type = TOKEN_NE;
} else if (stdscan_bufptr[0] == '!' && stdscan_bufptr[1] == '=') {
stdscan_bufptr += 2;
return tv->t_type = TOKEN_NE;
} else if (stdscan_bufptr[0] == '<' && stdscan_bufptr[1] == '=') {
stdscan_bufptr += 2;
return tv->t_type = TOKEN_LE;
} else if (stdscan_bufptr[0] == '>' && stdscan_bufptr[1] == '=') {
stdscan_bufptr += 2;
return tv->t_type = TOKEN_GE;
} else if (stdscan_bufptr[0] == '&' && stdscan_bufptr[1] == '&') {
stdscan_bufptr += 2;
return tv->t_type = TOKEN_DBL_AND;
} else if (stdscan_bufptr[0] == '^' && stdscan_bufptr[1] == '^') {
stdscan_bufptr += 2;
return tv->t_type = TOKEN_DBL_XOR;
} else if (stdscan_bufptr[0] == '|' && stdscan_bufptr[1] == '|') {
stdscan_bufptr += 2;
return tv->t_type = TOKEN_DBL_OR;
} else /* just an ordinary char */
return tv->t_type = (uint8_t)(*stdscan_bufptr++);
}
int main(int argc, char **argv)
{
char buffer[INSN_MAX * 2], *p, *ep, *q;
char outbuf[256];
char *pname = *argv;
char *filename = NULL;
uint32_t nextsync, synclen, initskip = 0L;
int lenread;
int32_t lendis;
bool autosync = false;
int bits = 16, b;
bool eof = false;
iflag_t prefer;
bool rn_error;
int64_t offset;
FILE *fp;
nasm_ctype_init();
nasm_set_verror(ndisasm_verror);
iflag_clear_all(&prefer);
offset = 0;
init_sync();
while (--argc) {
char *v, *vv, *p = *++argv;
if (*p == '-' && p[1]) {
p++;
while (*p)
switch (nasm_tolower(*p)) {
case 'a': /* auto or intelligent sync */
case 'i':
autosync = true;
p++;
break;
case 'h':
fputs(help, stderr);
return 0;
case 'r':
case 'v':
fprintf(stderr,
"NDISASM version %s compiled on %s\n",
nasm_version, nasm_date);
return 0;
case 'u': /* -u for -b 32, -uu for -b 64 */
if (bits < 64)
bits <<= 1;
p++;
break;
case 'b': /* bits */
v = p[1] ? p + 1 : --argc ? *++argv : NULL;
if (!v) {
fprintf(stderr, "%s: `-b' requires an argument\n",
pname);
return 1;
}
b = strtoul(v, &ep, 10);
if (*ep || !(bits == 16 || bits == 32 || bits == 64)) {
fprintf(stderr, "%s: argument to `-b' should"
" be 16, 32 or 64\n", pname);
} else {
bits = b;
}
p = ""; /* force to next argument */
break;
case 'o': /* origin */
v = p[1] ? p + 1 : --argc ? *++argv : NULL;
if (!v) {
fprintf(stderr, "%s: `-o' requires an argument\n",
pname);
return 1;
}
offset = readnum(v, &rn_error);
if (rn_error) {
fprintf(stderr,
"%s: `-o' requires a numeric argument\n",
pname);
return 1;
}
p = ""; /* force to next argument */
break;
case 's': /* sync point */
v = p[1] ? p + 1 : --argc ? *++argv : NULL;
if (!v) {
fprintf(stderr, "%s: `-s' requires an argument\n",
pname);
return 1;
}
add_sync(readnum(v, &rn_error), 0L);
if (rn_error) {
fprintf(stderr,
"%s: `-s' requires a numeric argument\n",
pname);
return 1;
}
p = ""; /* force to next argument */
break;
case 'e': /* skip a header */
v = p[1] ? p + 1 : --argc ? *++argv : NULL;
if (!v) {
fprintf(stderr, "%s: `-e' requires an argument\n",
pname);
return 1;
}
initskip = readnum(v, &rn_error);
if (rn_error) {
fprintf(stderr,
"%s: `-e' requires a numeric argument\n",
pname);
return 1;
}
p = ""; /* force to next argument */
break;
case 'k': /* skip a region */
v = p[1] ? p + 1 : --argc ? *++argv : NULL;
if (!v) {
fprintf(stderr, "%s: `-k' requires an argument\n",
pname);
return 1;
}
vv = strchr(v, ',');
if (!vv) {
fprintf(stderr,
"%s: `-k' requires two numbers separated"
" by a comma\n", pname);
return 1;
}
*vv++ = '\0';
nextsync = readnum(v, &rn_error);
if (rn_error) {
fprintf(stderr,
"%s: `-k' requires numeric arguments\n",
pname);
return 1;
}
synclen = readnum(vv, &rn_error);
if (rn_error) {
fprintf(stderr,
"%s: `-k' requires numeric arguments\n",
pname);
return 1;
}
add_sync(nextsync, synclen);
p = ""; /* force to next argument */
break;
case 'p': /* preferred vendor */
v = p[1] ? p + 1 : --argc ? *++argv : NULL;
if (!v) {
fprintf(stderr, "%s: `-p' requires an argument\n",
pname);
return 1;
}
if (!strcmp(v, "intel")) {
iflag_clear_all(&prefer); /* default */
} else if (!strcmp(v, "amd")) {
iflag_clear_all(&prefer);
iflag_set(&prefer, IF_AMD);
iflag_set(&prefer, IF_3DNOW);
} else if (!strcmp(v, "cyrix")) {
iflag_clear_all(&prefer);
iflag_set(&prefer, IF_CYRIX);
iflag_set(&prefer, IF_3DNOW);
} else if (!strcmp(v, "idt") ||
!strcmp(v, "centaur") ||
!strcmp(v, "winchip")) {
iflag_clear_all(&prefer);
iflag_set(&prefer, IF_3DNOW);
} else {
fprintf(stderr,
"%s: unknown vendor `%s' specified with `-p'\n",
pname, v);
return 1;
}
p = ""; /* force to next argument */
break;
default: /*bf */
fprintf(stderr, "%s: unrecognised option `-%c'\n",
pname, *p);
return 1;
}
} else if (!filename) {
filename = p;
} else {
fprintf(stderr, "%s: more than one filename specified\n",
pname);
return 1;
}
}
if (!filename) {
fprintf(stderr, help, pname);
return 0;
}
if (strcmp(filename, "-")) {
fp = fopen(filename, "rb");
if (!fp) {
fprintf(stderr, "%s: unable to open `%s': %s\n",
pname, filename, strerror(errno));
return 1;
}
} else
fp = stdin;
if (initskip > 0)
skip(initskip, fp);
/*
* This main loop is really horrible, and wants rewriting with
* an axe. It'll stay the way it is for a while though, until I
* find the energy...
*/
p = q = buffer;
nextsync = next_sync(offset, &synclen);
do {
uint32_t to_read = buffer + sizeof(buffer) - p;
if ((nextsync || synclen) &&
to_read > nextsync - offset - (p - q))
to_read = nextsync - offset - (p - q);
if (to_read) {
lenread = fread(p, 1, to_read, fp);
if (lenread == 0)
eof = true; /* help along systems with bad feof */
} else
lenread = 0;
p += lenread;
if ((nextsync || synclen) &&
(uint32_t)offset == nextsync) {
if (synclen) {
fprintf(stdout, "%08"PRIX64" skipping 0x%"PRIX32" bytes\n",
offset, synclen);
offset += synclen;
skip(synclen, fp);
}
p = q = buffer;
nextsync = next_sync(offset, &synclen);
}
while (p > q && (p - q >= INSN_MAX || lenread == 0)) {
lendis = disasm((uint8_t *)q, INSN_MAX, outbuf, sizeof(outbuf),
bits, offset, autosync, &prefer);
if (!lendis || lendis > (p - q)
|| ((nextsync || synclen) &&
(uint32_t)lendis > nextsync - offset))
lendis = eatbyte((uint8_t *) q, outbuf, sizeof(outbuf), bits);
output_ins(offset, (uint8_t *) q, lendis, outbuf);
q += lendis;
offset += lendis;
}
if (q >= buffer + INSN_MAX) {
uint8_t *r = (uint8_t *) buffer, *s = (uint8_t *) q;
int count = p - q;
while (count--)
*r++ = *s++;
p -= (q - buffer);
q = buffer;
}
} while (lenread > 0 || !(eof || feof(fp)));
if (fp != stdin)
fclose(fp);
return 0;
}
