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gnu / binutils-gdb / 41e27f512a5123bc28e982264b9ceb3b78e6da85 / . / gas / read.c
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/* read.c - read a source file -
Copyright 1986, 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
1998, 1999, 2000 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
GAS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GAS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GAS; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
#if 0
/* If your chars aren't 8 bits, you will change this a bit.
But then, GNU isn't spozed to run on your machine anyway.
(RMS is so shortsighted sometimes.) */
#define MASK_CHAR (0xFF)
#else
#define MASK_CHAR ((int)(unsigned char) -1)
#endif
/* This is the largest known floating point format (for now). It will
grow when we do 4361 style flonums. */
#define MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT (16)
/* Routines that read assembler source text to build spagetti in memory.
Another group of these functions is in the expr.c module. */
/* For isdigit (). */
#include <ctype.h>
#include "as.h"
#include "subsegs.h"
#include "sb.h"
#include "macro.h"
#include "obstack.h"
#include "listing.h"
#include "ecoff.h"
#ifndef TC_START_LABEL
#define TC_START_LABEL(x,y) (x==':')
#endif
/* Set by the object-format or the target. */
#ifndef TC_IMPLICIT_LCOMM_ALIGNMENT
#define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) \
do \
{ \
if ((SIZE) >= 8) \
(P2VAR) = 3; \
else if ((SIZE) >= 4) \
(P2VAR) = 2; \
else if ((SIZE) >= 2) \
(P2VAR) = 1; \
else \
(P2VAR) = 0; \
} \
while (0)
#endif
char *input_line_pointer; /*->next char of source file to parse. */
#if BITS_PER_CHAR != 8
/* The following table is indexed by[(char)] and will break if
a char does not have exactly 256 states (hopefully 0:255!)! */
die horribly;
#endif
#ifndef LEX_AT
/* The m88k unfortunately uses @ as a label beginner. */
#define LEX_AT 0
#endif
#ifndef LEX_BR
/* The RS/6000 assembler uses {,},[,] as parts of symbol names. */
#define LEX_BR 0
#endif
#ifndef LEX_PCT
/* The Delta 68k assembler permits % inside label names. */
#define LEX_PCT 0
#endif
#ifndef LEX_QM
/* The PowerPC Windows NT assemblers permits ? inside label names. */
#define LEX_QM 0
#endif
#ifndef LEX_HASH
/* The IA-64 assembler uses # as a suffix designating a symbol. We include
it in the symbol and strip it out in tc_canonicalize_symbol_name. */
#define LEX_HASH 0
#endif
#ifndef LEX_DOLLAR
/* The a29k assembler does not permits labels to start with $. */
#define LEX_DOLLAR 3
#endif
#ifndef LEX_TILDE
/* The Delta 68k assembler permits ~ at start of label names. */
#define LEX_TILDE 0
#endif
/* Used by is_... macros. our ctype[]. */
char lex_type[256] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */
0, 0, 0, LEX_HASH, LEX_DOLLAR, LEX_PCT, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM, /* 0123456789:;<=>? */
LEX_AT, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, 0, 3, /* PQRSTUVWXYZ[\]^_ */
0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, LEX_TILDE, 0, /* pqrstuvwxyz{|}~. */
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3
};
/* In: a character.
Out: 1 if this character ends a line. */
char is_end_of_line[256] = {
#ifdef CR_EOL
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, /* @abcdefghijklmno */
#else
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, /* @abcdefghijklmno */
#endif
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* _!"#$%&'()*+,-./ */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0123456789:;<=>? */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 /* */
};
#ifdef IGNORE_OPCODE_CASE
char original_case_string[128];
#endif
/* Functions private to this file. */
static char *buffer; /* 1st char of each buffer of lines is here. */
static char *buffer_limit; /*->1 + last char in buffer. */
/* TARGET_BYTES_BIG_ENDIAN is required to be defined to either 0 or 1
in the tc-<CPU>.h file. See the "Porting GAS" section of the
internals manual. */
int target_big_endian = TARGET_BYTES_BIG_ENDIAN;
static char *old_buffer; /* JF a hack. */
static char *old_input;
static char *old_limit;
/* Variables for handling include file directory table. */
/* Table of pointers to directories to search for .include's. */
char **include_dirs;
/* How many are in the table. */
int include_dir_count;
/* Length of longest in table. */
int include_dir_maxlen = 1;
#ifndef WORKING_DOT_WORD
struct broken_word *broken_words;
int new_broken_words;
#endif
/* The current offset into the absolute section. We don't try to
build frags in the absolute section, since no data can be stored
there. We just keep track of the current offset. */
addressT abs_section_offset;
/* If this line had an MRI style label, it is stored in this variable.
This is used by some of the MRI pseudo-ops. */
symbolS *line_label;
/* This global variable is used to support MRI common sections. We
translate such sections into a common symbol. This variable is
non-NULL when we are in an MRI common section. */
symbolS *mri_common_symbol;
/* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we
need to align to an even byte boundary unless the next pseudo-op is
dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment
may be needed. */
static int mri_pending_align;
#ifndef NO_LISTING
#ifdef OBJ_ELF
/* This variable is set to be non-zero if the next string we see might
be the name of the source file in DWARF debugging information. See
the comment in emit_expr for the format we look for. */
static int dwarf_file_string;
#endif
#endif
static void cons_worker PARAMS ((int, int));
static int scrub_from_string PARAMS ((char *, int));
static void do_align PARAMS ((int, char *, int, int));
static void s_align PARAMS ((int, int));
static void s_lcomm_internal PARAMS ((int, int));
static int hex_float PARAMS ((int, char *));
static inline int sizeof_sleb128 PARAMS ((offsetT));
static inline int sizeof_uleb128 PARAMS ((valueT));
static inline int output_sleb128 PARAMS ((char *, offsetT));
static inline int output_uleb128 PARAMS ((char *, valueT));
static inline int output_big_sleb128 PARAMS ((char *, LITTLENUM_TYPE *, int));
static inline int output_big_uleb128 PARAMS ((char *, LITTLENUM_TYPE *, int));
static int output_big_leb128 PARAMS ((char *, LITTLENUM_TYPE *, int, int));
static void do_org PARAMS ((segT, expressionS *, int));
char *demand_copy_string PARAMS ((int *lenP));
static segT get_segmented_expression PARAMS ((expressionS *expP));
static segT get_known_segmented_expression PARAMS ((expressionS * expP));
static void pobegin PARAMS ((void));
static int get_line_sb PARAMS ((sb *));
static void generate_file_debug PARAMS ((void));
void
read_begin ()
{
const char *p;
pobegin ();
obj_read_begin_hook ();
/* Something close -- but not too close -- to a multiple of 1024.
The debugging malloc I'm using has 24 bytes of overhead. */
obstack_begin (&notes, chunksize);
obstack_begin (&cond_obstack, chunksize);
/* Use machine dependent syntax. */
for (p = line_separator_chars; *p; p++)
is_end_of_line[(unsigned char) *p] = 1;
/* Use more. FIXME-SOMEDAY. */
if (flag_mri)
lex_type['?'] = 3;
}
/* Set up pseudo-op tables. */
static struct hash_control *po_hash;
static const pseudo_typeS potable[] = {
{"abort", s_abort, 0},
{"align", s_align_ptwo, 0},
{"ascii", stringer, 0},
{"asciz", stringer, 1},
{"balign", s_align_bytes, 0},
{"balignw", s_align_bytes, -2},
{"balignl", s_align_bytes, -4},
/* block */
{"byte", cons, 1},
{"comm", s_comm, 0},
{"common", s_mri_common, 0},
{"common.s", s_mri_common, 1},
{"data", s_data, 0},
{"dc", cons, 2},
{"dc.b", cons, 1},
{"dc.d", float_cons, 'd'},
{"dc.l", cons, 4},
{"dc.s", float_cons, 'f'},
{"dc.w", cons, 2},
{"dc.x", float_cons, 'x'},
{"dcb", s_space, 2},
{"dcb.b", s_space, 1},
{"dcb.d", s_float_space, 'd'},
{"dcb.l", s_space, 4},
{"dcb.s", s_float_space, 'f'},
{"dcb.w", s_space, 2},
{"dcb.x", s_float_space, 'x'},
{"ds", s_space, 2},
{"ds.b", s_space, 1},
{"ds.d", s_space, 8},
{"ds.l", s_space, 4},
{"ds.p", s_space, 12},
{"ds.s", s_space, 4},
{"ds.w", s_space, 2},
{"ds.x", s_space, 12},
{"debug", s_ignore, 0},
#ifdef S_SET_DESC
{"desc", s_desc, 0},
#endif
/* dim */
{"double", float_cons, 'd'},
/* dsect */
{"eject", listing_eject, 0}, /* Formfeed listing. */
{"else", s_else, 0},
{"elsec", s_else, 0},
{"elseif", s_elseif, (int) O_ne},
{"end", s_end, 0},
{"endc", s_endif, 0},
{"endfunc", s_func, 1},
{"endif", s_endif, 0},
/* endef */
{"equ", s_set, 0},
{"equiv", s_set, 1},
{"err", s_err, 0},
{"exitm", s_mexit, 0},
/* extend */
{"extern", s_ignore, 0}, /* We treat all undef as ext. */
{"appfile", s_app_file, 1},
{"appline", s_app_line, 0},
{"fail", s_fail, 0},
{"file", s_app_file, 0},
{"fill", s_fill, 0},
{"float", float_cons, 'f'},
{"format", s_ignore, 0},
{"func", s_func, 0},
{"global", s_globl, 0},
{"globl", s_globl, 0},
{"hword", cons, 2},
{"if", s_if, (int) O_ne},
{"ifc", s_ifc, 0},
{"ifdef", s_ifdef, 0},
{"ifeq", s_if, (int) O_eq},
{"ifeqs", s_ifeqs, 0},
{"ifge", s_if, (int) O_ge},
{"ifgt", s_if, (int) O_gt},
{"ifle", s_if, (int) O_le},
{"iflt", s_if, (int) O_lt},
{"ifnc", s_ifc, 1},
{"ifndef", s_ifdef, 1},
{"ifne", s_if, (int) O_ne},
{"ifnes", s_ifeqs, 1},
{"ifnotdef", s_ifdef, 1},
{"include", s_include, 0},
{"int", cons, 4},
{"irp", s_irp, 0},
{"irep", s_irp, 0},
{"irpc", s_irp, 1},
{"irepc", s_irp, 1},
{"lcomm", s_lcomm, 0},
{"lflags", listing_flags, 0}, /* Listing flags. */
{"linkonce", s_linkonce, 0},
{"list", listing_list, 1}, /* Turn listing on. */
{"llen", listing_psize, 1},
{"long", cons, 4},
{"lsym", s_lsym, 0},
{"macro", s_macro, 0},
{"mexit", s_mexit, 0},
{"mri", s_mri, 0},
{".mri", s_mri, 0}, /* Special case so .mri works in MRI mode. */
{"name", s_ignore, 0},
{"noformat", s_ignore, 0},
{"nolist", listing_list, 0}, /* Turn listing off. */
{"nopage", listing_nopage, 0},
{"octa", cons, 16},
{"offset", s_struct, 0},
{"org", s_org, 0},
{"p2align", s_align_ptwo, 0},
{"p2alignw", s_align_ptwo, -2},
{"p2alignl", s_align_ptwo, -4},
{"page", listing_eject, 0},
{"plen", listing_psize, 0},
{"print", s_print, 0},
{"psize", listing_psize, 0}, /* Set paper size. */
{"purgem", s_purgem, 0},
{"quad", cons, 8},
{"rep", s_rept, 0},
{"rept", s_rept, 0},
{"rva", s_rva, 4},
{"sbttl", listing_title, 1}, /* Subtitle of listing. */
/* scl */
/* sect */
{"set", s_set, 0},
{"short", cons, 2},
{"single", float_cons, 'f'},
/* size */
{"space", s_space, 0},
{"skip", s_space, 0},
{"sleb128", s_leb128, 1},
{"spc", s_ignore, 0},
{"stabd", s_stab, 'd'},
{"stabn", s_stab, 'n'},
{"stabs", s_stab, 's'},
{"string", stringer, 1},
{"struct", s_struct, 0},
/* tag */
{"text", s_text, 0},
/* This is for gcc to use. It's only just been added (2/94), so gcc
won't be able to use it for a while -- probably a year or more.
But once this has been released, check with gcc maintainers
before deleting it or even changing the spelling. */
{"this_GCC_requires_the_GNU_assembler", s_ignore, 0},
/* If we're folding case -- done for some targets, not necessarily
all -- the above string in an input file will be converted to
this one. Match it either way... */
{"this_gcc_requires_the_gnu_assembler", s_ignore, 0},
{"title", listing_title, 0}, /* Listing title. */
{"ttl", listing_title, 0},
/* type */
{"uleb128", s_leb128, 0},
/* use */
/* val */
{"xcom", s_comm, 0},
{"xdef", s_globl, 0},
{"xref", s_ignore, 0},
{"xstabs", s_xstab, 's'},
{"word", cons, 2},
{"zero", s_space, 0},
{NULL, NULL, 0} /* End sentinel. */
};
static int pop_override_ok = 0;
static const char *pop_table_name;
void
pop_insert (table)
const pseudo_typeS *table;
{
const char *errtxt;
const pseudo_typeS *pop;
for (pop = table; pop->poc_name; pop++)
{
errtxt = hash_insert (po_hash, pop->poc_name, (char *) pop);
if (errtxt && (!pop_override_ok || strcmp (errtxt, "exists")))
as_fatal (_("error constructing %s pseudo-op table: %s"), pop_table_name,
errtxt);
}
}
#ifndef md_pop_insert
#define md_pop_insert() pop_insert(md_pseudo_table)
#endif
#ifndef obj_pop_insert
#define obj_pop_insert() pop_insert(obj_pseudo_table)
#endif
static void
pobegin ()
{
po_hash = hash_new ();
/* Do the target-specific pseudo ops. */
pop_table_name = "md";
md_pop_insert ();
/* Now object specific. Skip any that were in the target table. */
pop_table_name = "obj";
pop_override_ok = 1;
obj_pop_insert ();
/* Now portable ones. Skip any that we've seen already. */
pop_table_name = "standard";
pop_insert (potable);
}
#define HANDLE_CONDITIONAL_ASSEMBLY() \
if (ignore_input ()) \
{ \
while (!is_end_of_line[(unsigned char) *input_line_pointer++]) \
if (input_line_pointer == buffer_limit) \
break; \
continue; \
}
/* This function is used when scrubbing the characters between #APP
and #NO_APP. */
static char *scrub_string;
static char *scrub_string_end;
static int
scrub_from_string (buf, buflen)
char *buf;
int buflen;
{
int copy;
copy = scrub_string_end - scrub_string;
if (copy > buflen)
copy = buflen;
memcpy (buf, scrub_string, copy);
scrub_string += copy;
return copy;
}
/* We read the file, putting things into a web that represents what we
have been reading. */
void
read_a_source_file (name)
char *name;
{
register char c;
register char *s; /* String of symbol, '\0' appended. */
register int temp;
pseudo_typeS *pop;
#ifdef WARN_COMMENTS
found_comment = 0;
#endif
buffer = input_scrub_new_file (name);
listing_file (name);
listing_newline (NULL);
register_dependency (name);
/* Generate debugging information before we've read anything in to denote
this file as the "main" source file and not a subordinate one
(e.g. N_SO vs N_SOL in stabs). */
generate_file_debug ();
while ((buffer_limit = input_scrub_next_buffer (&input_line_pointer)) != 0)
{ /* We have another line to parse. */
know (buffer_limit[-1] == '\n'); /* Must have a sentinel. */
contin: /* JF this goto is my fault I admit it.
Someone brave please re-write the whole
input section here? Pleeze??? */
while (input_line_pointer < buffer_limit)
{
/* We have more of this buffer to parse. */
/* We now have input_line_pointer->1st char of next line.
If input_line_pointer [-1] == '\n' then we just
scanned another line: so bump line counters. */
if (is_end_of_line[(unsigned char) input_line_pointer[-1]])
{
#ifdef md_start_line_hook
md_start_line_hook ();
#endif
if (input_line_pointer[-1] == '\n')
bump_line_counters ();
line_label = NULL;
if (LABELS_WITHOUT_COLONS || flag_m68k_mri)
{
/* Text at the start of a line must be a label, we
run down and stick a colon in. */
if (is_name_beginner (*input_line_pointer))
{
char *line_start = input_line_pointer;
char c;
int mri_line_macro;
LISTING_NEWLINE ();
HANDLE_CONDITIONAL_ASSEMBLY ();
c = get_symbol_end ();
/* In MRI mode, the EQU and MACRO pseudoops must
be handled specially. */
mri_line_macro = 0;
if (flag_m68k_mri)
{
char *rest = input_line_pointer + 1;
if (*rest == ':')
++rest;
if (*rest == ' ' || *rest == '\t')
++rest;
if ((strncasecmp (rest, "EQU", 3) == 0
|| strncasecmp (rest, "SET", 3) == 0)
&& (rest[3] == ' ' || rest[3] == '\t'))
{
input_line_pointer = rest + 3;
equals (line_start,
strncasecmp (rest, "SET", 3) == 0);
continue;
}
if (strncasecmp (rest, "MACRO", 5) == 0
&& (rest[5] == ' '
|| rest[5] == '\t'
|| is_end_of_line[(unsigned char) rest[5]]))
mri_line_macro = 1;
}
/* In MRI mode, we need to handle the MACRO
pseudo-op specially: we don't want to put the
symbol in the symbol table. */
if (!mri_line_macro
#ifdef TC_START_LABEL_WITHOUT_COLON
&& TC_START_LABEL_WITHOUT_COLON(c,
input_line_pointer)
#endif
)
line_label = colon (line_start);
else
line_label = symbol_create (line_start,
absolute_section,
(valueT) 0,
&zero_address_frag);
*input_line_pointer = c;
if (c == ':')
input_line_pointer++;
}
}
}
/* We are at the begining of a line, or similar place.
We expect a well-formed assembler statement.
A "symbol-name:" is a statement.
Depending on what compiler is used, the order of these tests
may vary to catch most common case 1st.
Each test is independent of all other tests at the (top) level.
PLEASE make a compiler that doesn't use this assembler.
It is crufty to waste a compiler's time encoding things for this
assembler, which then wastes more time decoding it.
(And communicating via (linear) files is silly!
If you must pass stuff, please pass a tree!) */
if ((c = *input_line_pointer++) == '\t'
|| c == ' '
|| c == '\f'
|| c == 0)
c = *input_line_pointer++;
know (c != ' '); /* No further leading whitespace. */
#ifndef NO_LISTING
/* If listing is on, and we are expanding a macro, then give
the listing code the contents of the expanded line. */
if (listing)
{
if ((listing & LISTING_MACEXP) && macro_nest > 0)
{
char *copy;
int len;
/* Find the end of the current expanded macro line. */
for (s = input_line_pointer - 1; *s; ++s)
if (is_end_of_line[(unsigned char) *s])
break;
/* Copy it for safe keeping. Also give an indication of
how much macro nesting is involved at this point. */
len = s - (input_line_pointer - 1);
copy = (char *) xmalloc (len + macro_nest + 2);
memset (copy, '>', macro_nest);
copy[macro_nest] = ' ';
memcpy (copy + macro_nest + 1, input_line_pointer - 1, len);
copy[macro_nest + 1 + len] = '\0';
/* Install the line with the listing facility. */
listing_newline (copy);
}
else
listing_newline (NULL);
}
#endif
/* C is the 1st significant character.
Input_line_pointer points after that character. */
if (is_name_beginner (c))
{
/* Want user-defined label or pseudo/opcode. */
HANDLE_CONDITIONAL_ASSEMBLY ();
s = --input_line_pointer;
c = get_symbol_end (); /* name's delimiter. */
/* C is character after symbol.
That character's place in the input line is now '\0'.
S points to the beginning of the symbol.
[In case of pseudo-op, s->'.'.]
Input_line_pointer->'\0' where c was. */
if (TC_START_LABEL (c, input_line_pointer))
{
if (flag_m68k_mri)
{
char *rest = input_line_pointer + 1;
/* In MRI mode, \tsym: set 0 is permitted. */
if (*rest == ':')
++rest;
if (*rest == ' ' || *rest == '\t')
++rest;
if ((strncasecmp (rest, "EQU", 3) == 0
|| strncasecmp (rest, "SET", 3) == 0)
&& (rest[3] == ' ' || rest[3] == '\t'))
{
input_line_pointer = rest + 3;
equals (s, 1);
continue;
}
}
line_label = colon (s); /* User-defined label. */
/* Put ':' back for error messages' sake. */
*input_line_pointer++ = ':';
/* Input_line_pointer->after ':'. */
SKIP_WHITESPACE ();
}
else if (c == '='
|| ((c == ' ' || c == '\t')
&& input_line_pointer[1] == '='
#ifdef TC_EQUAL_IN_INSN
&& !TC_EQUAL_IN_INSN (c, input_line_pointer)
#endif
))
{
equals (s, 1);
demand_empty_rest_of_line ();
}
else
{
/* Expect pseudo-op or machine instruction. */
pop = NULL;
#ifdef IGNORE_OPCODE_CASE
{
char *s2 = s;
strncpy (original_case_string, s2, sizeof (original_case_string));
original_case_string[sizeof (original_case_string) - 1] = 0;
while (*s2)
{
if (isupper ((unsigned char) *s2))
*s2 = tolower (*s2);
s2++;
}
}
#endif
if (NO_PSEUDO_DOT || flag_m68k_mri)
{
/* The MRI assembler and the m88k use pseudo-ops
without a period. */
pop = (pseudo_typeS *) hash_find (po_hash, s);
if (pop != NULL && pop->poc_handler == NULL)
pop = NULL;
}
if (pop != NULL
|| (!flag_m68k_mri && *s == '.'))
{
/* PSEUDO - OP.
WARNING: c has next char, which may be end-of-line.
We lookup the pseudo-op table with s+1 because we
already know that the pseudo-op begins with a '.'. */
if (pop == NULL)
pop = (pseudo_typeS *) hash_find (po_hash, s + 1);
/* In MRI mode, we may need to insert an
automatic alignment directive. What a hack
this is. */
if (mri_pending_align
&& (pop == NULL
|| !((pop->poc_handler == cons
&& pop->poc_val == 1)
|| (pop->poc_handler == s_space
&& pop->poc_val == 1)
#ifdef tc_conditional_pseudoop
|| tc_conditional_pseudoop (pop)
#endif
|| pop->poc_handler == s_if
|| pop->poc_handler == s_ifdef
|| pop->poc_handler == s_ifc
|| pop->poc_handler == s_ifeqs
|| pop->poc_handler == s_else
|| pop->poc_handler == s_endif
|| pop->poc_handler == s_globl
|| pop->poc_handler == s_ignore)))
{
do_align (1, (char *) NULL, 0, 0);
mri_pending_align = 0;
if (line_label != NULL)
{
symbol_set_frag (line_label, frag_now);
S_SET_VALUE (line_label, frag_now_fix ());
}
}
/* Print the error msg now, while we still can. */
if (pop == NULL)
{
as_bad (_("Unknown pseudo-op: `%s'"), s);
*input_line_pointer = c;
s_ignore (0);
continue;
}
/* Put it back for error messages etc. */
*input_line_pointer = c;
/* The following skip of whitespace is compulsory.
A well shaped space is sometimes all that separates
keyword from operands. */
if (c == ' ' || c == '\t')
input_line_pointer++;
/* Input_line is restored.
Input_line_pointer->1st non-blank char
after pseudo-operation. */
(*pop->poc_handler) (pop->poc_val);
/* If that was .end, just get out now. */
if (pop->poc_handler == s_end)
goto quit;
}
else
{
int inquote = 0;
#ifdef QUOTES_IN_INSN
int inescape = 0;
#endif
/* WARNING: c has char, which may be end-of-line. */
/* Also: input_line_pointer->`\0` where c was. */
*input_line_pointer = c;
while (!is_end_of_line[(unsigned char) *input_line_pointer]
|| inquote
#ifdef TC_EOL_IN_INSN
|| TC_EOL_IN_INSN (input_line_pointer)
#endif
)
{
if (flag_m68k_mri && *input_line_pointer == '\'')
inquote = !inquote;
#ifdef QUOTES_IN_INSN
if (inescape)
inescape = 0;
else if (*input_line_pointer == '"')
inquote = !inquote;
else if (*input_line_pointer == '\\')
inescape = 1;
#endif
input_line_pointer++;
}
c = *input_line_pointer;
*input_line_pointer = '\0';
generate_lineno_debug ();
if (macro_defined)
{
sb out;
const char *err;
macro_entry *macro;
if (check_macro (s, &out, '\0', &err, &macro))
{
if (err != NULL)
as_bad ("%s", err);
*input_line_pointer++ = c;
input_scrub_include_sb (&out,
input_line_pointer, 1);
sb_kill (&out);
buffer_limit =
input_scrub_next_buffer (&input_line_pointer);
#ifdef md_macro_info
md_macro_info (macro);
#endif
continue;
}
}
if (mri_pending_align)
{
do_align (1, (char *) NULL, 0, 0);
mri_pending_align = 0;
if (line_label != NULL)
{
symbol_set_frag (line_label, frag_now);
S_SET_VALUE (line_label, frag_now_fix ());
}
}
md_assemble (s); /* Assemble 1 instruction. */
*input_line_pointer++ = c;
/* We resume loop AFTER the end-of-line from
this instruction. */
}
}
continue;
}
/* Empty statement? */
if (is_end_of_line[(unsigned char) c])
continue;
if ((LOCAL_LABELS_DOLLAR || LOCAL_LABELS_FB)
&& isdigit ((unsigned char) c))
{
/* local label ("4:") */
char *backup = input_line_pointer;
HANDLE_CONDITIONAL_ASSEMBLY ();
temp = c - '0';
/* Read the whole number. */
while (isdigit ((unsigned char) *input_line_pointer))
{
temp = (temp * 10) + *input_line_pointer - '0';
++input_line_pointer;
}
if (LOCAL_LABELS_DOLLAR
&& *input_line_pointer == '$'
&& *(input_line_pointer + 1) == ':')
{
input_line_pointer += 2;
if (dollar_label_defined (temp))
{
as_fatal (_("label \"%d$\" redefined"), temp);
}
define_dollar_label (temp);
colon (dollar_label_name (temp, 0));
continue;
}
if (LOCAL_LABELS_FB
&& *input_line_pointer++ == ':')
{
fb_label_instance_inc (temp);
colon (fb_label_name (temp, 0));
continue;
}
input_line_pointer = backup;
} /* local label ("4:") */
if (c && strchr (line_comment_chars, c))
{ /* Its a comment. Better say APP or NO_APP. */
char *ends;
char *new_buf;
char *new_tmp;
unsigned int new_length;
char *tmp_buf = 0;
bump_line_counters ();
s = input_line_pointer;
if (strncmp (s, "APP\n", 4))
continue; /* We ignore it */
s += 4;
ends = strstr (s, "#NO_APP\n");
if (!ends)
{
unsigned int tmp_len;
unsigned int num;
/* The end of the #APP wasn't in this buffer. We
keep reading in buffers until we find the #NO_APP
that goes with this #APP There is one. The specs
guarentee it... */
tmp_len = buffer_limit - s;
tmp_buf = xmalloc (tmp_len + 1);
memcpy (tmp_buf, s, tmp_len);
do
{
new_tmp = input_scrub_next_buffer (&buffer);
if (!new_tmp)
break;
else
buffer_limit = new_tmp;
input_line_pointer = buffer;
ends = strstr (buffer, "#NO_APP\n");
if (ends)
num = ends - buffer;
else
num = buffer_limit - buffer;
tmp_buf = xrealloc (tmp_buf, tmp_len + num);
memcpy (tmp_buf + tmp_len, buffer, num);
tmp_len += num;
}
while (!ends);
input_line_pointer = ends ? ends + 8 : NULL;
s = tmp_buf;
ends = s + tmp_len;
}
else
{
input_line_pointer = ends + 8;
}
scrub_string = s;
scrub_string_end = ends;
new_length = ends - s;
new_buf = (char *) xmalloc (new_length);
new_tmp = new_buf;
for (;;)
{
int space;
int size;
space = (new_buf + new_length) - new_tmp;
size = do_scrub_chars (scrub_from_string, new_tmp, space);
if (size < space)
{
new_tmp += size;
break;
}
new_buf = xrealloc (new_buf, new_length + 100);
new_tmp = new_buf + new_length;
new_length += 100;
}
if (tmp_buf)
free (tmp_buf);
old_buffer = buffer;
old_input = input_line_pointer;
old_limit = buffer_limit;
buffer = new_buf;
input_line_pointer = new_buf;
buffer_limit = new_tmp;
continue;
}
HANDLE_CONDITIONAL_ASSEMBLY ();
#ifdef tc_unrecognized_line
if (tc_unrecognized_line (c))
continue;
#endif
/* as_warn (_("Junk character %d."),c); Now done by ignore_rest. */
input_line_pointer--; /* Report unknown char as ignored. */
ignore_rest_of_line ();
}
#ifdef md_after_pass_hook
md_after_pass_hook ();
#endif
if (old_buffer)
{
free (buffer);
bump_line_counters ();
if (old_input != 0)
{
buffer = old_buffer;
input_line_pointer = old_input;
buffer_limit = old_limit;
old_buffer = 0;
goto contin;
}
}
}
quit:
#ifdef md_cleanup
md_cleanup ();
#endif
/* Close the input file. */
input_scrub_close ();
#ifdef WARN_COMMENTS
{
if (warn_comment && found_comment)
as_warn_where (found_comment_file, found_comment,
"first comment found here");
}
#endif
}
/* For most MRI pseudo-ops, the line actually ends at the first
nonquoted space. This function looks for that point, stuffs a null
in, and sets *STOPCP to the character that used to be there, and
returns the location.
Until I hear otherwise, I am going to assume that this is only true
for the m68k MRI assembler. */
char *
mri_comment_field (stopcp)
char *stopcp;
{
char *s;
#ifdef TC_M68K
int inquote = 0;
know (flag_m68k_mri);
for (s = input_line_pointer;
((!is_end_of_line[(unsigned char) *s] && *s != ' ' && *s != '\t')
|| inquote);
s++)
{
if (*s == '\'')
inquote = !inquote;
}
#else
for (s = input_line_pointer;
!is_end_of_line[(unsigned char) *s];
s++)
;
#endif
*stopcp = *s;
*s = '\0';
return s;
}
/* Skip to the end of an MRI comment field. */
void
mri_comment_end (stop, stopc)
char *stop;
int stopc;
{
know (flag_mri);
input_line_pointer = stop;
*stop = stopc;
while (!is_end_of_line[(unsigned char) *input_line_pointer])
++input_line_pointer;
}
void
s_abort (ignore)
int ignore ATTRIBUTE_UNUSED;
{
as_fatal (_(".abort detected. Abandoning ship."));
}
/* Guts of .align directive. N is the power of two to which to align.
FILL may be NULL, or it may point to the bytes of the fill pattern.
LEN is the length of whatever FILL points to, if anything. MAX is
the maximum number of characters to skip when doing the alignment,
or 0 if there is no maximum. */
static void
do_align (n, fill, len, max)
int n;
char *fill;
int len;
int max;
{
#ifdef md_do_align
md_do_align (n, fill, len, max, just_record_alignment);
#endif
/* Only make a frag if we HAVE to... */
if (n != 0 && !need_pass_2)
{
if (fill == NULL)
{
if (subseg_text_p (now_seg))
frag_align_code (n, max);
else
frag_align (n, 0, max);
}
else if (len <= 1)
frag_align (n, *fill, max);
else
frag_align_pattern (n, fill, len, max);
}
#ifdef md_do_align
just_record_alignment:
#endif
record_alignment (now_seg, n - OCTETS_PER_BYTE_POWER);
}
/* Handle the .align pseudo-op. A positive ARG is a default alignment
(in bytes). A negative ARG is the negative of the length of the
fill pattern. BYTES_P is non-zero if the alignment value should be
interpreted as the byte boundary, rather than the power of 2. */
static void
s_align (arg, bytes_p)
int arg;
int bytes_p;
{
register unsigned int align;
char *stop = NULL;
char stopc;
offsetT fill = 0;
int max;
int fill_p;
if (flag_mri)
stop = mri_comment_field (&stopc);
if (is_end_of_line[(unsigned char) *input_line_pointer])
{
if (arg < 0)
align = 0;
else
align = arg; /* Default value from pseudo-op table. */
}
else
{
align = get_absolute_expression ();
SKIP_WHITESPACE ();
}
if (bytes_p)
{
/* Convert to a power of 2. */
if (align != 0)
{
unsigned int i;
for (i = 0; (align & 1) == 0; align >>= 1, ++i)
;
if (align != 1)
as_bad (_("Alignment not a power of 2"));
align = i;
}
}
if (align > 15)
{
align = 15;
as_bad (_("Alignment too large: %u assumed"), align);
}
if (*input_line_pointer != ',')
{
fill_p = 0;
max = 0;
}
else
{
++input_line_pointer;
if (*input_line_pointer == ',')
fill_p = 0;
else
{
fill = get_absolute_expression ();
SKIP_WHITESPACE ();
fill_p = 1;
}
if (*input_line_pointer != ',')
max = 0;
else
{
++input_line_pointer;
max = get_absolute_expression ();
}
}
if (!fill_p)
{
if (arg < 0)
as_warn (_("expected fill pattern missing"));
do_align (align, (char *) NULL, 0, max);
}
else
{
int fill_len;
if (arg >= 0)
fill_len = 1;
else
fill_len = -arg;
if (fill_len <= 1)
{
char fill_char;
fill_char = fill;
do_align (align, &fill_char, fill_len, max);
}
else
{
char ab[16];
if ((size_t) fill_len > sizeof ab)
abort ();
md_number_to_chars (ab, fill, fill_len);
do_align (align, ab, fill_len, max);
}
}
demand_empty_rest_of_line ();
if (flag_mri)
mri_comment_end (stop, stopc);
}
/* Handle the .align pseudo-op on machines where ".align 4" means
align to a 4 byte boundary. */
void
s_align_bytes (arg)
int arg;
{
s_align (arg, 1);
}
/* Handle the .align pseudo-op on machines where ".align 4" means align
to a 2**4 boundary. */
void
s_align_ptwo (arg)
int arg;
{
s_align (arg, 0);
}
void
s_comm (ignore)
int ignore ATTRIBUTE_UNUSED;
{
register char *name;
register char c;
register char *p;
offsetT temp;
register symbolS *symbolP;
char *stop = NULL;
char stopc;
if (flag_mri)
stop = mri_comment_field (&stopc);
name = input_line_pointer;
c = get_symbol_end ();
/* Just after name is now '\0'. */
p = input_line_pointer;
*p = c;
SKIP_WHITESPACE ();
if (*input_line_pointer != ',')
{
as_bad (_("Expected comma after symbol-name: rest of line ignored."));
ignore_rest_of_line ();
if (flag_mri)
mri_comment_end (stop, stopc);
return;
}
input_line_pointer++; /* skip ',' */
if ((temp = get_absolute_expression ()) < 0)
{
as_warn (_(".COMMon length (%ld.) <0! Ignored."), (long) temp);
ignore_rest_of_line ();
if (flag_mri)
mri_comment_end (stop, stopc);
return;
}
*p = 0;
symbolP = symbol_find_or_make (name);
*p = c;
if (S_IS_DEFINED (symbolP) && !S_IS_COMMON (symbolP))
{
as_bad (_("Ignoring attempt to re-define symbol `%s'."),
S_GET_NAME (symbolP));
ignore_rest_of_line ();
if (flag_mri)
mri_comment_end (stop, stopc);
return;
}
if (S_GET_VALUE (symbolP))
{
if (S_GET_VALUE (symbolP) != (valueT) temp)
as_bad (_("Length of .comm \"%s\" is already %ld. Not changed to %ld."),
S_GET_NAME (symbolP),
(long) S_GET_VALUE (symbolP),
(long) temp);
}
else
{
S_SET_VALUE (symbolP, (valueT) temp);
S_SET_EXTERNAL (symbolP);
}
#ifdef OBJ_VMS
{
extern int flag_one;
if (!temp || !flag_one)
S_GET_OTHER(symbolP) = const_flag;
}
#endif /* not OBJ_VMS */
know (symbolP->sy_frag == &zero_address_frag);
demand_empty_rest_of_line ();
if (flag_mri)
mri_comment_end (stop, stopc);
} /* s_comm() */
/* The MRI COMMON pseudo-op. We handle this by creating a common
symbol with the appropriate name. We make s_space do the right
thing by increasing the size. */
void
s_mri_common (small)
int small ATTRIBUTE_UNUSED;
{
char *name;
char c;
char *alc = NULL;
symbolS *sym;
offsetT align;
char *stop = NULL;
char stopc;
if (!flag_mri)
{
s_comm (0);
return;
}
stop = mri_comment_field (&stopc);
SKIP_WHITESPACE ();
name = input_line_pointer;
if (!isdigit ((unsigned char) *name))
c = get_symbol_end ();
else
{
do
{
++input_line_pointer;
}
while (isdigit ((unsigned char) *input_line_pointer));
c = *input_line_pointer;
*input_line_pointer = '\0';
if (line_label != NULL)
{
alc = (char *) xmalloc (strlen (S_GET_NAME (line_label))
+ (input_line_pointer - name)
+ 1);
sprintf (alc, "%s%s", name, S_GET_NAME (line_label));
name = alc;
}
}
sym = symbol_find_or_make (name);
*input_line_pointer = c;
if (alc != NULL)
free (alc);
if (*input_line_pointer != ',')
align = 0;
else
{
++input_line_pointer;
align = get_absolute_expression ();
}
if (S_IS_DEFINED (sym) && !S_IS_COMMON (sym))
{
as_bad (_("attempt to re-define symbol `%s'"), S_GET_NAME (sym));
ignore_rest_of_line ();
mri_comment_end (stop, stopc);
return;
}
S_SET_EXTERNAL (sym);
mri_common_symbol = sym;
#ifdef S_SET_ALIGN
if (align != 0)
S_SET_ALIGN (sym, align);
#endif
if (line_label != NULL)
{
expressionS exp;
exp.X_op = O_symbol;
exp.X_add_symbol = sym;
exp.X_add_number = 0;
symbol_set_value_expression (line_label, &exp);
symbol_set_frag (line_label, &zero_address_frag);
S_SET_SEGMENT (line_label, expr_section);
}
/* FIXME: We just ignore the small argument, which distinguishes
COMMON and COMMON.S. I don't know what we can do about it. */
/* Ignore the type and hptype. */
if (*input_line_pointer == ',')
input_line_pointer += 2;
if (*input_line_pointer == ',')
input_line_pointer += 2;
demand_empty_rest_of_line ();
mri_comment_end (stop, stopc);
}
void
s_data (ignore)
int ignore ATTRIBUTE_UNUSED;
{
segT section;
register int temp;
temp = get_absolute_expression ();
if (flag_readonly_data_in_text)
{
section = text_section;
temp += 1000;
}
else
section = data_section;
subseg_set (section, (subsegT) temp);
#ifdef OBJ_VMS
const_flag = 0;
#endif
demand_empty_rest_of_line ();
}
/* Handle the .appfile pseudo-op. This is automatically generated by
do_scrub_chars when a preprocessor # line comment is seen with a
file name. This default definition may be overridden by the object
or CPU specific pseudo-ops. This function is also the default
definition for .file; the APPFILE argument is 1 for .appfile, 0 for
.file. */
void
s_app_file (appfile)
int appfile;
{
register char *s;
int length;
/* Some assemblers tolerate immediately following '"'. */
if ((s = demand_copy_string (&length)) != 0)
{
/* If this is a fake .appfile, a fake newline was inserted into
the buffer. Passing -2 to new_logical_line tells it to
account for it. */
int may_omit
= (!new_logical_line (s, appfile ? -2 : -1) && appfile);
/* In MRI mode, the preprocessor may have inserted an extraneous
backquote. */
if (flag_m68k_mri
&& *input_line_pointer == '\''
&& is_end_of_line[(unsigned char) input_line_pointer[1]])
++input_line_pointer;
demand_empty_rest_of_line ();
if (!may_omit)
{
#ifdef LISTING
if (listing)
listing_source_file (s);
#endif
register_dependency (s);
#ifdef obj_app_file
obj_app_file (s);
#endif
}
}
}
/* Handle the .appline pseudo-op. This is automatically generated by
do_scrub_chars when a preprocessor # line comment is seen. This
default definition may be overridden by the object or CPU specific
pseudo-ops. */
void
s_app_line (ignore)
int ignore ATTRIBUTE_UNUSED;
{
int l;
/* The given number is that of the next line. */
l = get_absolute_expression () - 1;
if (l < 0)
/* Some of the back ends can't deal with non-positive line numbers.
Besides, it's silly. */
as_warn (_("Line numbers must be positive; line number %d rejected."),
l + 1);
else
{
new_logical_line ((char *) NULL, l);
#ifdef LISTING
if (listing)
listing_source_line (l);
#endif
}
demand_empty_rest_of_line ();
}
/* Handle the .end pseudo-op. Actually, the real work is done in
read_a_source_file. */
void
s_end (ignore)
int ignore ATTRIBUTE_UNUSED;
{
if (flag_mri)
{
/* The MRI assembler permits the start symbol to follow .end,
but we don't support that. */
SKIP_WHITESPACE ();
if (!is_end_of_line[(unsigned char) *input_line_pointer]
&& *input_line_pointer != '*'
&& *input_line_pointer != '!')
as_warn (_("start address not supported"));
}
}
/* Handle the .err pseudo-op. */
void
s_err (ignore)
int ignore ATTRIBUTE_UNUSED;
{
as_bad (_(".err encountered"));
demand_empty_rest_of_line ();
}
/* Handle the MRI fail pseudo-op. */
void
s_fail (ignore)
int ignore ATTRIBUTE_UNUSED;
{
offsetT temp;
char *stop = NULL;
char stopc;
if (flag_mri)
stop = mri_comment_field (&stopc);
temp = get_absolute_expression ();
if (temp >= 500)
as_warn (_(".fail %ld encountered"), (long) temp);
else
as_bad (_(".fail %ld encountered"), (long) temp);
demand_empty_rest_of_line ();
if (flag_mri)
mri_comment_end (stop, stopc);
}
void
s_fill (ignore)
int ignore ATTRIBUTE_UNUSED;
{
expressionS rep_exp;
long size = 1;
register long fill = 0;
char *p;
#ifdef md_flush_pending_output
md_flush_pending_output ();
#endif
get_known_segmented_expression (&rep_exp);
if (*input_line_pointer == ',')
{
input_line_pointer++;
size = get_absolute_expression ();
if (*input_line_pointer == ',')
{
input_line_pointer++;
fill = get_absolute_expression ();
}
}
/* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
#define BSD_FILL_SIZE_CROCK_8 (8)
if (size > BSD_FILL_SIZE_CROCK_8)
{
as_warn (_(".fill size clamped to %d."), BSD_FILL_SIZE_CROCK_8);
size = BSD_FILL_SIZE_CROCK_8;
}
if (size < 0)
{
as_warn (_("Size negative: .fill ignored."));
size = 0;
}
else if (rep_exp.X_op == O_constant && rep_exp.X_add_number <= 0)
{
if (rep_exp.X_add_number < 0)
as_warn (_("Repeat < 0, .fill ignored"));
size = 0;
}
if (size && !need_pass_2)
{
if (rep_exp.X_op == O_constant)
{
p = frag_var (rs_fill, (int) size, (int) size,
(relax_substateT) 0, (symbolS *) 0,
(offsetT) rep_exp.X_add_number,
(char *) 0);
}
else
{
/* We don't have a constant repeat count, so we can't use
rs_fill. We can get the same results out of rs_space,
but its argument is in bytes, so we must multiply the
repeat count by size. */
symbolS *rep_sym;
rep_sym = make_expr_symbol (&rep_exp);
if (size != 1)
{
expressionS size_exp;
size_exp.X_op = O_constant;
size_exp.X_add_number = size;
rep_exp.X_op = O_multiply;
rep_exp.X_add_symbol = rep_sym;
rep_exp.X_op_symbol = make_expr_symbol (&size_exp);
rep_exp.X_add_number = 0;
rep_sym = make_expr_symbol (&rep_exp);
}
p = frag_var (rs_space, (int) size, (int) size,
(relax_substateT) 0, rep_sym, (offsetT) 0, (char *) 0);
}
memset (p, 0, (unsigned int) size);
/* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
flavoured AS. The following bizzare behaviour is to be
compatible with above. I guess they tried to take up to 8
bytes from a 4-byte expression and they forgot to sign
extend. Un*x Sux. */
#define BSD_FILL_SIZE_CROCK_4 (4)
md_number_to_chars (p, (valueT) fill,
(size > BSD_FILL_SIZE_CROCK_4
? BSD_FILL_SIZE_CROCK_4
: (int) size));
/* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
but emits no error message because it seems a legal thing to do.
It is a degenerate case of .fill but could be emitted by a
compiler. */
}
demand_empty_rest_of_line ();
}
void
s_globl (ignore)
int ignore ATTRIBUTE_UNUSED;
{
char *name;
int c;
symbolS *symbolP;
char *stop = NULL;
char stopc;
if (flag_mri)
stop = mri_comment_field (&stopc);
do
{
name = input_line_pointer;
c = get_symbol_end ();
symbolP = symbol_find_or_make (name);
S_SET_EXTERNAL (symbolP);
*input_line_pointer = c;
SKIP_WHITESPACE ();
c = *input_line_pointer;
if (c == ',')
{
input_line_pointer++;
SKIP_WHITESPACE ();
if (*input_line_pointer == '\n')
c = '\n';
}
}
while (c == ',');
demand_empty_rest_of_line ();
if (flag_mri)
mri_comment_end (stop, stopc);
}
/* Handle the MRI IRP and IRPC pseudo-ops. */
void
s_irp (irpc)
int irpc;
{
char *file;
unsigned int line;
sb s;
const char *err;
sb out;
as_where (&file, &line);
sb_new (&s);
while (!is_end_of_line[(unsigned char) *input_line_pointer])
sb_add_char (&s, *input_line_pointer++);
sb_new (&out);
err = expand_irp (irpc, 0, &s, &out, get_line_sb, '\0');
if (err != NULL)
as_bad_where (file, line, "%s", err);
sb_kill (&s);
input_scrub_include_sb (&out, input_line_pointer, 1);
sb_kill (&out);
buffer_limit = input_scrub_next_buffer (&input_line_pointer);
}
/* Handle the .linkonce pseudo-op. This tells the assembler to mark
the section to only be linked once. However, this is not supported
by most object file formats. This takes an optional argument,
which is what to do about duplicates. */
void
s_linkonce (ignore)
int ignore ATTRIBUTE_UNUSED;
{
enum linkonce_type type;
SKIP_WHITESPACE ();
type = LINKONCE_DISCARD;
if (!is_end_of_line[(unsigned char) *input_line_pointer])
{
char *s;
char c;
s = input_line_pointer;
c = get_symbol_end ();
if (strcasecmp (s, "discard") == 0)
type = LINKONCE_DISCARD;
else if (strcasecmp (s, "one_only") == 0)
type = LINKONCE_ONE_ONLY;
else if (strcasecmp (s, "same_size") == 0)
type = LINKONCE_SAME_SIZE;
else if (strcasecmp (s, "same_contents") == 0)
type = LINKONCE_SAME_CONTENTS;
else
as_warn (_("unrecognized .linkonce type `%s'"), s);
*input_line_pointer = c;
}
#ifdef obj_handle_link_once
obj_handle_link_once (type);
#else /* ! defined (obj_handle_link_once) */
#ifdef BFD_ASSEMBLER
{
flagword flags;
if ((bfd_applicable_section_flags (stdoutput) & SEC_LINK_ONCE) == 0)
as_warn (_(".linkonce is not supported for this object file format"));
flags = bfd_get_section_flags (stdoutput, now_seg);
flags |= SEC_LINK_ONCE;
switch (type)
{
default:
abort ();
case LINKONCE_DISCARD:
flags |= SEC_LINK_DUPLICATES_DISCARD;
break;
case LINKONCE_ONE_ONLY:
flags |= SEC_LINK_DUPLICATES_ONE_ONLY;
break;
case LINKONCE_SAME_SIZE:
flags |= SEC_LINK_DUPLICATES_SAME_SIZE;
break;
case LINKONCE_SAME_CONTENTS:
flags |= SEC_LINK_DUPLICATES_SAME_CONTENTS;
break;
}
if (!bfd_set_section_flags (stdoutput, now_seg, flags))
as_bad (_("bfd_set_section_flags: %s"),
bfd_errmsg (bfd_get_error ()));
}
#else /* ! defined (BFD_ASSEMBLER) */
as_warn (_(".linkonce is not supported for this object file format"));
#endif /* ! defined (BFD_ASSEMBLER) */
#endif /* ! defined (obj_handle_link_once) */
demand_empty_rest_of_line ();
}
static void
s_lcomm_internal (needs_align, bytes_p)
/* 1 if this was a ".bss" directive, which may require a 3rd argument
(alignment); 0 if it was an ".lcomm" (2 args only). */
int needs_align;
/* 1 if the alignment value should be interpreted as the byte boundary,
rather than the power of 2. */
int bytes_p;
{
register char *name;
register char c;
register char *p;
register int temp;
register symbolS *symbolP;
segT current_seg = now_seg;
subsegT current_subseg = now_subseg;
const int max_alignment = 15;
int align = 0;
segT bss_seg = bss_section;
name = input_line_pointer;
c = get_symbol_end ();
p = input_line_pointer;
*p = c;
SKIP_WHITESPACE ();
/* Accept an optional comma after the name. The comma used to be
required, but Irix 5 cc does not generate it. */
if (*input_line_pointer == ',')
{
++input_line_pointer;
SKIP_WHITESPACE ();
}
if (*input_line_pointer == '\n')
{
as_bad (_("Missing size expression"));
return;
}
if ((temp = get_absolute_expression ()) < 0)
{
as_warn (_("BSS length (%d.) <0! Ignored."), temp);
ignore_rest_of_line ();
return;
}
#if defined (TC_MIPS) || defined (TC_ALPHA)
if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour
|| OUTPUT_FLAVOR == bfd_target_elf_flavour)
{
/* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
if (temp <= bfd_get_gp_size (stdoutput))
{
bss_seg = subseg_new (".sbss", 1);
seg_info (bss_seg)->bss = 1;
#ifdef BFD_ASSEMBLER
if (!bfd_set_section_flags (stdoutput, bss_seg, SEC_ALLOC))
as_warn (_("error setting flags for \".sbss\": %s"),
bfd_errmsg (bfd_get_error ()));
#endif
}
}
#endif
if (!needs_align)
{
TC_IMPLICIT_LCOMM_ALIGNMENT (temp, align);
/* Still zero unless TC_IMPLICIT_LCOMM_ALIGNMENT set it. */
if (align)
record_alignment (bss_seg, align);
}
if (needs_align)
{
align = 0;
SKIP_WHITESPACE ();
if (*input_line_pointer != ',')
{
as_bad (_("Expected comma after size"));
ignore_rest_of_line ();
return;
}
input_line_pointer++;
SKIP_WHITESPACE ();
if (*input_line_pointer == '\n')
{
as_bad (_("Missing alignment"));
return;
}
align = get_absolute_expression ();
if (bytes_p)
{
/* Convert to a power of 2. */
if (align != 0)
{
unsigned int i;
for (i = 0; (align & 1) == 0; align >>= 1, ++i)
;
if (align != 1)
as_bad (_("Alignment not a power of 2"));
align = i;
}
}
if (align > max_alignment)
{
align = max_alignment;
as_warn (_("Alignment too large: %d. assumed."), align);
}
else if (align < 0)
{
align = 0;
as_warn (_("Alignment negative. 0 assumed."));
}
record_alignment (bss_seg, align);
}
else
{
/* Assume some objects may require alignment on some systems. */
#if defined (TC_ALPHA) && ! defined (VMS)
if (temp > 1)
{
align = ffs (temp) - 1;
if (temp % (1 << align))
abort ();
}
#endif
}
*p = 0;
symbolP = symbol_find_or_make (name);
*p = c;
if (
#if (defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT) \
|| defined (OBJ_BOUT) || defined (OBJ_MAYBE_BOUT))
#ifdef BFD_ASSEMBLER
(OUTPUT_FLAVOR != bfd_target_aout_flavour
|| (S_GET_OTHER (symbolP) == 0 && S_GET_DESC (symbolP) == 0)) &&
#else
(S_GET_OTHER (symbolP) == 0 && S_GET_DESC (symbolP) == 0) &&
#endif
#endif
(S_GET_SEGMENT (symbolP) == bss_seg
|| (!S_IS_DEFINED (symbolP) && S_GET_VALUE (symbolP) == 0)))
{
char *pfrag;
subseg_set (bss_seg, 1);
if (align)
frag_align (align, 0, 0);
/* Detach from old frag. */
if (S_GET_SEGMENT (symbolP) == bss_seg)
symbol_get_frag (symbolP)->fr_symbol = NULL;
symbol_set_frag (symbolP, frag_now);
pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP,
(offsetT) temp, (char *) 0);
*pfrag = 0;
S_SET_SEGMENT (symbolP, bss_seg);
#ifdef OBJ_COFF
/* The symbol may already have been created with a preceding
".globl" directive -- be careful not to step on storage class
in that case. Otherwise, set it to static. */
if (S_GET_STORAGE_CLASS (symbolP) != C_EXT)
{
S_SET_STORAGE_CLASS (symbolP, C_STAT);
}
#endif /* OBJ_COFF */
#ifdef S_SET_SIZE
S_SET_SIZE (symbolP, temp);
#endif
}
else
as_bad (_("Ignoring attempt to re-define symbol `%s'."),
S_GET_NAME (symbolP));
subseg_set (current_seg, current_subseg);
demand_empty_rest_of_line ();
}
void
s_lcomm (needs_align)
int needs_align;
{
s_lcomm_internal (needs_align, 0);
}
void
s_lcomm_bytes (needs_align)
int needs_align;
{
s_lcomm_internal (needs_align, 1);
}
void
s_lsym (ignore)
int ignore ATTRIBUTE_UNUSED;
{
register char *name;
register char c;
register char *p;
expressionS exp;
register symbolS *symbolP;
/* We permit ANY defined expression: BSD4.2 demands constants. */
name = input_line_pointer;
c = get_symbol_end ();
p = input_line_pointer;
*p = c;
SKIP_WHITESPACE ();
if (*input_line_pointer != ',')
{
*p = 0;
as_bad (_("Expected comma after name \"%s\""), name);
*p = c;
ignore_rest_of_line ();
return;
}
input_line_pointer++;
expression (&exp);
if (exp.X_op != O_constant
&& exp.X_op != O_register)
{
as_bad (_("bad expression"));
ignore_rest_of_line ();
return;
}
*p = 0;
symbolP = symbol_find_or_make (name);
/* FIXME-SOON I pulled a (&& symbolP->sy_other == 0 &&
symbolP->sy_desc == 0) out of this test because coff doesn't have
those fields, and I can't see when they'd ever be tripped. I
don't think I understand why they were here so I may have
introduced a bug. As recently as 1.37 didn't have this test
anyway. xoxorich. */
if (S_GET_SEGMENT (symbolP) == undefined_section
&& S_GET_VALUE (symbolP) == 0)
{
/* The name might be an undefined .global symbol; be sure to
keep the "external" bit. */
S_SET_SEGMENT (symbolP,
(exp.X_op == O_constant
? absolute_section
: reg_section));
S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
}
else
{
as_bad (_("Symbol %s already defined"), name);
}
*p = c;
demand_empty_rest_of_line ();
}
/* Read a line into an sb. */
static int
get_line_sb (line)
sb *line;
{
char quote1, quote2, inquote;
if (input_line_pointer[-1] == '\n')
bump_line_counters ();
if (input_line_pointer >= buffer_limit)
{
buffer_limit = input_scrub_next_buffer (&input_line_pointer);
if (buffer_limit == 0)
return 0;
}
/* If app.c sets any other characters to LEX_IS_STRINGQUOTE, this
code needs to be changed. */
if (!flag_m68k_mri)
quote1 = '"';
else
quote1 = '\0';
quote2 = '\0';
if (flag_m68k_mri)
quote2 = '\'';
#ifdef LEX_IS_STRINGQUOTE
quote2 = '\'';
#endif
inquote = '\0';
while (!is_end_of_line[(unsigned char) *input_line_pointer]
|| (inquote != '\0' && *input_line_pointer != '\n'))
{
if (inquote == *input_line_pointer)
inquote = '\0';
else if (inquote == '\0')
{
if (*input_line_pointer == quote1)
inquote = quote1;
else if (*input_line_pointer == quote2)
inquote = quote2;
}
sb_add_char (line, *input_line_pointer++);
}
while (input_line_pointer < buffer_limit
&& is_end_of_line[(unsigned char) *input_line_pointer])
{
if (input_line_pointer[-1] == '\n')
bump_line_counters ();
++input_line_pointer;
}
return 1;
}
/* Define a macro. This is an interface to macro.c, which is shared
between gas and gasp. */
void
s_macro (ignore)
int ignore ATTRIBUTE_UNUSED;
{
char *file;
unsigned int line;
sb s;
sb label;
const char *err;
const char *name;
as_where (&file, &line);
sb_new (&s);
while (!is_end_of_line[(unsigned char) *input_line_pointer])
sb_add_char (&s, *input_line_pointer++);
sb_new (&label);
if (line_label != NULL)
sb_add_string (&label, S_GET_NAME (line_label));
err = define_macro (0, &s, &label, get_line_sb, &name);
if (err != NULL)
as_bad_where (file, line, "%s", err);
else
{
if (line_label != NULL)
{
S_SET_SEGMENT (line_label, undefined_section);
S_SET_VALUE (line_label, 0);
symbol_set_frag (line_label, &zero_address_frag);
}
if (((NO_PSEUDO_DOT || flag_m68k_mri)
&& hash_find (po_hash, name) != NULL)
|| (!flag_m68k_mri
&& *name == '.'
&& hash_find (po_hash, name + 1) != NULL))
as_warn (_("attempt to redefine pseudo-op `%s' ignored"),
name);
}
sb_kill (&s);
}
/* Handle the .mexit pseudo-op, which immediately exits a macro
expansion. */
void
s_mexit (ignore)
int ignore ATTRIBUTE_UNUSED;
{
cond_exit_macro (macro_nest);
buffer_limit = input_scrub_next_buffer (&input_line_pointer);
}
/* Switch in and out of MRI mode. */
void
s_mri (ignore)
int ignore ATTRIBUTE_UNUSED;
{
int on, old_flag;
on = get_absolute_expression ();
old_flag = flag_mri;
if (on != 0)
{
flag_mri = 1;
#ifdef TC_M68K
flag_m68k_mri = 1;
#endif
macro_mri_mode (1);
}
else
{
flag_mri = 0;
#ifdef TC_M68K
flag_m68k_mri = 0;
#endif
macro_mri_mode (0);
}
/* Operator precedence changes in m68k MRI mode, so we need to
update the operator rankings. */
expr_set_precedence ();
#ifdef MRI_MODE_CHANGE
if (on != old_flag)
MRI_MODE_CHANGE (on);
#endif
demand_empty_rest_of_line ();
}
/* Handle changing the location counter. */
static void
do_org (segment, exp, fill)
segT segment;
expressionS *exp;
int fill;
{
if (segment != now_seg && segment != absolute_section)
as_bad (_("invalid segment \"%s\"; segment \"%s\" assumed"),
segment_name (segment), segment_name (now_seg));
if (now_seg == absolute_section)
{
if (fill != 0)
as_warn (_("ignoring fill value in absolute section"));
if (exp->X_op != O_constant)
{
as_bad (_("only constant offsets supported in absolute section"));
exp->X_add_number = 0;
}
abs_section_offset = exp->X_add_number;
}
else
{
char *p;
symbolS *sym = exp->X_add_symbol;
offsetT off = exp->X_add_number * OCTETS_PER_BYTE;
if (exp->X_op != O_constant && exp->X_op != O_symbol)
{
/* Handle complex expressions. */
sym = make_expr_symbol (exp);
off = 0;
}
p = frag_var (rs_org, 1, 1, (relax_substateT) 0, sym, off, (char *) 0);
*p = fill;
}
}
void
s_org (ignore)
int ignore ATTRIBUTE_UNUSED;
{
register segT segment;
expressionS exp;
register long temp_fill;
#ifdef md_flush_pending_output
md_flush_pending_output ();
#endif
/* The m68k MRI assembler has a different meaning for .org. It
means to create an absolute section at a given address. We can't
support that--use a linker script instead. */
if (flag_m68k_mri)
{
as_bad (_("MRI style ORG pseudo-op not supported"));
ignore_rest_of_line ();
return;
}
/* Don't believe the documentation of BSD 4.2 AS. There is no such
thing as a sub-segment-relative origin. Any absolute origin is
given a warning, then assumed to be segment-relative. Any
segmented origin expression ("foo+42") had better be in the right
segment or the .org is ignored.
BSD 4.2 AS warns if you try to .org backwards. We cannot because
we never know sub-segment sizes when we are reading code. BSD
will crash trying to emit negative numbers of filler bytes in
certain .orgs. We don't crash, but see as-write for that code.
Don't make frag if need_pass_2==1. */
segment = get_known_segmented_expression (&exp);
if (*input_line_pointer == ',')
{
input_line_pointer++;
temp_fill = get_absolute_expression ();
}
else
temp_fill = 0;
if (!need_pass_2)
do_org (segment, &exp, temp_fill);
demand_empty_rest_of_line ();
}
/* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
called by the obj-format routine which handles section changing
when in MRI mode. It will create a new section, and return it. It
will set *TYPE to the section type: one of 'C' (code), 'D' (data),
'M' (mixed), or 'R' (romable). If BFD_ASSEMBLER is defined, the
flags will be set in the section. */
void
s_mri_sect (type)
char *type ATTRIBUTE_UNUSED;
{
#ifdef TC_M68K
char *name;
char c;
segT seg;
SKIP_WHITESPACE ();
name = input_line_pointer;
if (!isdigit ((unsigned char) *name))
c = get_symbol_end ();
else
{
do
{
++input_line_pointer;
}
while (isdigit ((unsigned char) *input_line_pointer));
c = *input_line_pointer;
*input_line_pointer = '\0';
}
name = xstrdup (name);
*input_line_pointer = c;
seg = subseg_new (name, 0);
if (*input_line_pointer == ',')
{
int align;
++input_line_pointer;
align = get_absolute_expression ();
record_alignment (seg, align);
}
*type = 'C';
if (*input_line_pointer == ',')
{
c = *++input_line_pointer;
c = toupper ((unsigned char) c);
if (c == 'C' || c == 'D' || c == 'M' || c == 'R')
*type = c;
else
as_bad (_("unrecognized section type"));
++input_line_pointer;
#ifdef BFD_ASSEMBLER
{
flagword flags;
flags = SEC_NO_FLAGS;
if (*type == 'C')
flags = SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE;
else if (*type == 'D' || *type == 'M')
flags = SEC_ALLOC | SEC_LOAD | SEC_DATA;
else if (*type == 'R')
flags = SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_READONLY | SEC_ROM;
if (flags != SEC_NO_FLAGS)
{
if (!bfd_set_section_flags (stdoutput, seg, flags))
as_warn (_("error setting flags for \"%s\": %s"),
bfd_section_name (stdoutput, seg),
bfd_errmsg (bfd_get_error ()));
}
}
#endif
}
/* Ignore the HP type. */
if (*input_line_pointer == ',')
input_line_pointer += 2;
demand_empty_rest_of_line ();
#else /* ! TC_M68K */
#ifdef TC_I960
char *name;
char c;
segT seg;
SKIP_WHITESPACE ();
name = input_line_pointer;
c = get_symbol_end ();
name = xstrdup (name);
*input_line_pointer = c;
seg = subseg_new (name, 0);
if (*input_line_pointer != ',')
*type = 'C';
else
{
char *sectype;
++input_line_pointer;
SKIP_WHITESPACE ();
sectype = input_line_pointer;
c = get_symbol_end ();
if (*sectype == '\0')
*type = 'C';
else if (strcasecmp (sectype, "text") == 0)
*type = 'C';
else if (strcasecmp (sectype, "data") == 0)
*type = 'D';
else if (strcasecmp (sectype, "romdata") == 0)
*type = 'R';
else
as_warn (_("unrecognized section type `%s'"), sectype);
*input_line_pointer = c;
}
if (*input_line_pointer == ',')
{
char *seccmd;
++input_line_pointer;
SKIP_WHITESPACE ();
seccmd = input_line_pointer;
c = get_symbol_end ();
if (strcasecmp (seccmd, "absolute") == 0)
{
as_bad (_("absolute sections are not supported"));
*input_line_pointer = c;
ignore_rest_of_line ();
return;
}
else if (strcasecmp (seccmd, "align") == 0)
{
int align;
*input_line_pointer = c;
align = get_absolute_expression ();
record_alignment (seg, align);
}
else
{
as_warn (_("unrecognized section command `%s'"), seccmd);
*input_line_pointer = c;
}
}
demand_empty_rest_of_line ();
#else /* ! TC_I960 */
/* The MRI assembler seems to use different forms of .sect for
different targets. */
as_bad ("MRI mode not supported for this target");
ignore_rest_of_line ();
#endif /* ! TC_I960 */
#endif /* ! TC_M68K */
}
/* Handle the .print pseudo-op. */
void
s_print (ignore)
int ignore ATTRIBUTE_UNUSED;
{
char *s;
int len;
s = demand_copy_C_string (&len);
printf ("%s\n", s);
demand_empty_rest_of_line ();
}
/* Handle the .purgem pseudo-op. */
void
s_purgem (ignore)
int ignore ATTRIBUTE_UNUSED;
{
if (is_it_end_of_statement ())
{
demand_empty_rest_of_line ();
return;
}
do
{
char *name;
char c;
SKIP_WHITESPACE ();
name = input_line_pointer;
c = get_symbol_end ();
delete_macro (name);
*input_line_pointer = c;
SKIP_WHITESPACE ();
}
while (*input_line_pointer++ == ',');
--input_line_pointer;
demand_empty_rest_of_line ();
}
/* Handle the .rept pseudo-op. */
void
s_rept (ignore)
int ignore ATTRIBUTE_UNUSED;
{
int count;
count = get_absolute_expression ();
do_repeat (count, "REPT", "ENDR");
}
/* This function provides a generic repeat block implementation. It allows
different directives to be used as the start/end keys. */
void
do_repeat (count, start, end)
int count;
const char *start;
const char *end;
{
sb one;
sb many;
sb_new (&one);
if (!buffer_and_nest (start, end, &one, get_line_sb))
{
as_bad (_("%s without %s"), start, end);
return;
}
sb_new (&many);
while (count-- > 0)
sb_add_sb (&many, &one);
sb_kill (&one);
input_scrub_include_sb (&many, input_line_pointer, 1);
sb_kill (&many);
buffer_limit = input_scrub_next_buffer (&input_line_pointer);
}
/* Skip to end of current repeat loop; EXTRA indicates how many additional
input buffers to skip. Assumes that conditionals preceding the loop end
are properly nested.
This function makes it easier to implement a premature "break" out of the
loop. The EXTRA arg accounts for other buffers we might have inserted,
such as line substitutions. */
void
end_repeat (extra)
int extra;
{
cond_exit_macro (macro_nest);
while (extra-- >= 0)
buffer_limit = input_scrub_next_buffer (&input_line_pointer);
}
/* Handle the .equ, .equiv and .set directives. If EQUIV is 1, then
this is .equiv, and it is an error if the symbol is already
defined. */
void
s_set (equiv)
int equiv;
{
register char *name;
register char delim;
register char *end_name;
register symbolS *symbolP;
/* Especial apologies for the random logic:
this just grew, and could be parsed much more simply!
Dean in haste. */
name = input_line_pointer;
delim = get_symbol_end ();
end_name = input_line_pointer;
*end_name = delim;
SKIP_WHITESPACE ();
if (*input_line_pointer != ',')
{
*end_name = 0;
as_bad (_("Expected comma after name \"%s\""), name);
*end_name = delim;
ignore_rest_of_line ();
return;
}
input_line_pointer++;
*end_name = 0;
if (name[0] == '.' && name[1] == '\0')
{
/* Turn '. = mumble' into a .org mumble. */
register segT segment;
expressionS exp;
segment = get_known_segmented_expression (&exp);
if (!need_pass_2)
do_org (segment, &exp, 0);
*end_name = delim;
return;
}
if ((symbolP = symbol_find (name)) == NULL
&& (symbolP = md_undefined_symbol (name)) == NULL)
{
#ifndef NO_LISTING
/* When doing symbol listings, play games with dummy fragments living
outside the normal fragment chain to record the file and line info
for this symbol. */
if (listing & LISTING_SYMBOLS)
{
extern struct list_info_struct *listing_tail;
fragS *dummy_frag = (fragS *) xmalloc (sizeof (fragS));
memset (dummy_frag, 0, sizeof (fragS));
dummy_frag->fr_type = rs_fill;
dummy_frag->line = listing_tail;
symbolP = symbol_new (name, undefined_section, 0, dummy_frag);
dummy_frag->fr_symbol = symbolP;
}
else
#endif
symbolP = symbol_new (name, undefined_section, 0, &zero_address_frag);
#ifdef OBJ_COFF
/* "set" symbols are local unless otherwise specified. */
SF_SET_LOCAL (symbolP);
#endif /* OBJ_COFF */
}
symbol_table_insert (symbolP);
*end_name = delim;
if (equiv
&& S_IS_DEFINED (symbolP)
&& S_GET_SEGMENT (symbolP) != reg_section)
as_bad (_("symbol `%s' already defined"), S_GET_NAME (symbolP));
pseudo_set (symbolP);
demand_empty_rest_of_line ();
}
void
s_space (mult)
int mult;
{
expressionS exp;
expressionS val;
char *p = 0;
char *stop = NULL;
char stopc;
int bytes;
#ifdef md_flush_pending_output
md_flush_pending_output ();
#endif
if (flag_mri)
stop = mri_comment_field (&stopc);
/* In m68k MRI mode, we need to align to a word boundary, unless
this is ds.b. */
if (flag_m68k_mri && mult > 1)
{
if (now_seg == absolute_section)
{
abs_section_offset += abs_section_offset & 1;
if (line_label != NULL)
S_SET_VALUE (line_label, abs_section_offset);
}
else if (mri_common_symbol != NULL)