Retro68/binutils/gas/as.c

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/* as.c - GAS main program.
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Copyright (C) 1987-2017 Free Software Foundation, Inc.
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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 3, 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, 51 Franklin Street - Fifth Floor, Boston, MA
02110-1301, USA. */
/* Main program for AS; a 32-bit assembler of GNU.
Understands command arguments.
Has a few routines that don't fit in other modules because they
are shared.
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bugs
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: initialisers
Since no-one else says they will support them in future: I
don't support them now. */
#define COMMON
#include "as.h"
#include "subsegs.h"
#include "output-file.h"
#include "sb.h"
#include "macro.h"
#include "dwarf2dbg.h"
#include "dw2gencfi.h"
#include "bfdver.h"
#ifdef HAVE_ITBL_CPU
#include "itbl-ops.h"
#else
#define itbl_init()
#endif
#ifdef HAVE_SBRK
#ifdef NEED_DECLARATION_SBRK
extern void *sbrk ();
#endif
#endif
#ifdef USING_CGEN
/* Perform any cgen specific initialisation for gas. */
extern void gas_cgen_begin (void);
#endif
/* We build a list of defsyms as we read the options, and then define
them after we have initialized everything. */
struct defsym_list
{
struct defsym_list *next;
char *name;
valueT value;
};
/* True if a listing is wanted. */
int listing;
/* Type of debugging to generate. */
enum debug_info_type debug_type = DEBUG_UNSPECIFIED;
int use_gnu_debug_info_extensions = 0;
#ifndef MD_DEBUG_FORMAT_SELECTOR
#define MD_DEBUG_FORMAT_SELECTOR NULL
#endif
static enum debug_info_type (*md_debug_format_selector) (int *) = MD_DEBUG_FORMAT_SELECTOR;
/* Maximum level of macro nesting. */
int max_macro_nest = 100;
/* argv[0] */
static char * myname;
/* The default obstack chunk size. If we set this to zero, the
obstack code will use whatever will fit in a 4096 byte block. */
int chunksize = 0;
/* To monitor memory allocation more effectively, make this non-zero.
Then the chunk sizes for gas and bfd will be reduced. */
int debug_memory = 0;
/* Enable verbose mode. */
int verbose = 0;
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#if defined OBJ_ELF || defined OBJ_MAYBE_ELF
int flag_use_elf_stt_common = DEFAULT_GENERATE_ELF_STT_COMMON;
#endif
/* Keep the output file. */
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static int keep_it = 0;
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segT reg_section;
segT expr_section;
segT text_section;
segT data_section;
segT bss_section;
/* Name of listing file. */
static char *listing_filename = NULL;
static struct defsym_list *defsyms;
#ifdef HAVE_ITBL_CPU
/* Keep a record of the itbl files we read in. */
struct itbl_file_list
{
struct itbl_file_list *next;
char *name;
};
static struct itbl_file_list *itbl_files;
#endif
static long start_time;
#ifdef HAVE_SBRK
char *start_sbrk;
#endif
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static int flag_macro_alternate;
#ifdef USE_EMULATIONS
#define EMULATION_ENVIRON "AS_EMULATION"
extern struct emulation mipsbelf, mipslelf, mipself;
extern struct emulation i386coff, i386elf, i386aout;
extern struct emulation crisaout, criself;
static struct emulation *const emulations[] = { EMULATIONS };
static const int n_emulations = sizeof (emulations) / sizeof (emulations[0]);
static void
select_emulation_mode (int argc, char **argv)
{
int i;
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char *p;
const char *em = NULL;
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for (i = 1; i < argc; i++)
if (!strncmp ("--em", argv[i], 4))
break;
if (i == argc)
goto do_default;
p = strchr (argv[i], '=');
if (p)
p++;
else
p = argv[i + 1];
if (!p || !*p)
as_fatal (_("missing emulation mode name"));
em = p;
do_default:
if (em == 0)
em = getenv (EMULATION_ENVIRON);
if (em == 0)
em = DEFAULT_EMULATION;
if (em)
{
for (i = 0; i < n_emulations; i++)
if (!strcmp (emulations[i]->name, em))
break;
if (i == n_emulations)
as_fatal (_("unrecognized emulation name `%s'"), em);
this_emulation = emulations[i];
}
else
this_emulation = emulations[0];
this_emulation->init ();
}
const char *
default_emul_bfd_name (void)
{
abort ();
return NULL;
}
void
common_emul_init (void)
{
this_format = this_emulation->format;
if (this_emulation->leading_underscore == 2)
this_emulation->leading_underscore = this_format->dfl_leading_underscore;
if (this_emulation->default_endian != 2)
target_big_endian = this_emulation->default_endian;
if (this_emulation->fake_label_name == 0)
{
if (this_emulation->leading_underscore)
this_emulation->fake_label_name = "L0\001";
else
/* What other parameters should we test? */
this_emulation->fake_label_name = ".L0\001";
}
}
#endif
void
print_version_id (void)
{
static int printed;
if (printed)
return;
printed = 1;
fprintf (stderr, _("GNU assembler version %s (%s) using BFD version %s\n"),
VERSION, TARGET_ALIAS, BFD_VERSION_STRING);
}
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#ifdef DEFAULT_FLAG_COMPRESS_DEBUG
enum compressed_debug_section_type flag_compress_debug
= COMPRESS_DEBUG_GABI_ZLIB;
#endif
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static void
show_usage (FILE * stream)
{
fprintf (stream, _("Usage: %s [option...] [asmfile...]\n"), myname);
fprintf (stream, _("\
Options:\n\
-a[sub-option...] turn on listings\n\
Sub-options [default hls]:\n\
c omit false conditionals\n\
d omit debugging directives\n\
g include general info\n\
h include high-level source\n\
l include assembly\n\
m include macro expansions\n\
n omit forms processing\n\
s include symbols\n\
=FILE list to FILE (must be last sub-option)\n"));
fprintf (stream, _("\
--alternate initially turn on alternate macro syntax\n"));
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#ifdef DEFAULT_FLAG_COMPRESS_DEBUG
fprintf (stream, _("\
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--compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
compress DWARF debug sections using zlib [default]\n"));
fprintf (stream, _("\
--nocompress-debug-sections\n\
don't compress DWARF debug sections\n"));
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#else
fprintf (stream, _("\
--compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\
compress DWARF debug sections using zlib\n"));
fprintf (stream, _("\
--nocompress-debug-sections\n\
don't compress DWARF debug sections [default]\n"));
#endif
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fprintf (stream, _("\
-D produce assembler debugging messages\n"));
fprintf (stream, _("\
--debug-prefix-map OLD=NEW\n\
map OLD to NEW in debug information\n"));
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fprintf (stream, _("\
--defsym SYM=VAL define symbol SYM to given value\n"));
#ifdef USE_EMULATIONS
{
int i;
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const char *def_em;
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fprintf (stream, "\
--em=[");
for (i = 0; i < n_emulations - 1; i++)
fprintf (stream, "%s | ", emulations[i]->name);
fprintf (stream, "%s]\n", emulations[i]->name);
def_em = getenv (EMULATION_ENVIRON);
if (!def_em)
def_em = DEFAULT_EMULATION;
fprintf (stream, _("\
emulate output (default %s)\n"), def_em);
}
#endif
#if defined OBJ_ELF || defined OBJ_MAYBE_ELF
fprintf (stream, _("\
--execstack require executable stack for this object\n"));
fprintf (stream, _("\
--noexecstack don't require executable stack for this object\n"));
fprintf (stream, _("\
--size-check=[error|warning]\n\
ELF .size directive check (default --size-check=error)\n"));
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fprintf (stream, _("\
--elf-stt-common=[no|yes]\n\
generate ELF common symbols with STT_COMMON type\n"));
fprintf (stream, _("\
--sectname-subst enable section name substitution sequences\n"));
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#endif
fprintf (stream, _("\
-f skip whitespace and comment preprocessing\n"));
fprintf (stream, _("\
-g --gen-debug generate debugging information\n"));
fprintf (stream, _("\
--gstabs generate STABS debugging information\n"));
fprintf (stream, _("\
--gstabs+ generate STABS debug info with GNU extensions\n"));
fprintf (stream, _("\
--gdwarf-2 generate DWARF2 debugging information\n"));
fprintf (stream, _("\
--gdwarf-sections generate per-function section names for DWARF line information\n"));
fprintf (stream, _("\
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--hash-size=<value> set the hash table size close to <value>\n"));
fprintf (stream, _("\
--help show this message and exit\n"));
fprintf (stream, _("\
--target-help show target specific options\n"));
fprintf (stream, _("\
-I DIR add DIR to search list for .include directives\n"));
fprintf (stream, _("\
-J don't warn about signed overflow\n"));
fprintf (stream, _("\
-K warn when differences altered for long displacements\n"));
fprintf (stream, _("\
-L,--keep-locals keep local symbols (e.g. starting with `L')\n"));
fprintf (stream, _("\
-M,--mri assemble in MRI compatibility mode\n"));
fprintf (stream, _("\
--MD FILE write dependency information in FILE (default none)\n"));
fprintf (stream, _("\
-nocpp ignored\n"));
fprintf (stream, _("\
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-no-pad-sections do not pad the end of sections to alignment boundaries\n"));
fprintf (stream, _("\
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-o OBJFILE name the object-file output OBJFILE (default a.out)\n"));
fprintf (stream, _("\
-R fold data section into text section\n"));
fprintf (stream, _("\
--reduce-memory-overheads \n\
prefer smaller memory use at the cost of longer\n\
assembly times\n"));
fprintf (stream, _("\
--statistics print various measured statistics from execution\n"));
fprintf (stream, _("\
--strip-local-absolute strip local absolute symbols\n"));
fprintf (stream, _("\
--traditional-format Use same format as native assembler when possible\n"));
fprintf (stream, _("\
--version print assembler version number and exit\n"));
fprintf (stream, _("\
-W --no-warn suppress warnings\n"));
fprintf (stream, _("\
--warn don't suppress warnings\n"));
fprintf (stream, _("\
--fatal-warnings treat warnings as errors\n"));
#ifdef HAVE_ITBL_CPU
fprintf (stream, _("\
--itbl INSTTBL extend instruction set to include instructions\n\
matching the specifications defined in file INSTTBL\n"));
#endif
fprintf (stream, _("\
-w ignored\n"));
fprintf (stream, _("\
-X ignored\n"));
fprintf (stream, _("\
-Z generate object file even after errors\n"));
fprintf (stream, _("\
--listing-lhs-width set the width in words of the output data column of\n\
the listing\n"));
fprintf (stream, _("\
--listing-lhs-width2 set the width in words of the continuation lines\n\
of the output data column; ignored if smaller than\n\
the width of the first line\n"));
fprintf (stream, _("\
--listing-rhs-width set the max width in characters of the lines from\n\
the source file\n"));
fprintf (stream, _("\
--listing-cont-lines set the maximum number of continuation lines used\n\
for the output data column of the listing\n"));
fprintf (stream, _("\
@FILE read options from FILE\n"));
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md_show_usage (stream);
fputc ('\n', stream);
if (REPORT_BUGS_TO[0] && stream == stdout)
fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
}
/* Since it is easy to do here we interpret the special arg "-"
to mean "use stdin" and we set that argv[] pointing to "".
After we have munged argv[], the only things left are source file
name(s) and ""(s) denoting stdin. These file names are used
(perhaps more than once) later.
check for new machine-dep cmdline options in
md_parse_option definitions in config/tc-*.c. */
static void
parse_args (int * pargc, char *** pargv)
{
int old_argc;
int new_argc;
char ** old_argv;
char ** new_argv;
/* Starting the short option string with '-' is for programs that
expect options and other ARGV-elements in any order and that care about
the ordering of the two. We describe each non-option ARGV-element
as if it were the argument of an option with character code 1. */
char *shortopts;
extern const char *md_shortopts;
static const char std_shortopts[] =
{
'-', 'J',
#ifndef WORKING_DOT_WORD
/* -K is not meaningful if .word is not being hacked. */
'K',
#endif
'L', 'M', 'R', 'W', 'Z', 'a', ':', ':', 'D', 'f', 'g', ':',':', 'I', ':', 'o', ':',
#ifndef VMS
/* -v takes an argument on VMS, so we don't make it a generic
option. */
'v',
#endif
'w', 'X',
#ifdef HAVE_ITBL_CPU
/* New option for extending instruction set (see also --itbl below). */
't', ':',
#endif
'\0'
};
struct option *longopts;
extern struct option md_longopts[];
extern size_t md_longopts_size;
/* Codes used for the long options with no short synonyms. */
enum option_values
{
OPTION_HELP = OPTION_STD_BASE,
OPTION_NOCPP,
OPTION_STATISTICS,
OPTION_VERSION,
OPTION_DUMPCONFIG,
OPTION_VERBOSE,
OPTION_EMULATION,
OPTION_DEBUG_PREFIX_MAP,
OPTION_DEFSYM,
OPTION_LISTING_LHS_WIDTH,
OPTION_LISTING_LHS_WIDTH2,
OPTION_LISTING_RHS_WIDTH,
OPTION_LISTING_CONT_LINES,
OPTION_DEPFILE,
OPTION_GSTABS,
OPTION_GSTABS_PLUS,
OPTION_GDWARF2,
OPTION_GDWARF_SECTIONS,
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OPTION_STRIP_LOCAL_ABSOLUTE,
OPTION_TRADITIONAL_FORMAT,
OPTION_WARN,
OPTION_TARGET_HELP,
OPTION_EXECSTACK,
OPTION_NOEXECSTACK,
OPTION_SIZE_CHECK,
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OPTION_ELF_STT_COMMON,
OPTION_SECTNAME_SUBST,
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OPTION_ALTERNATE,
OPTION_AL,
OPTION_HASH_TABLE_SIZE,
OPTION_REDUCE_MEMORY_OVERHEADS,
OPTION_WARN_FATAL,
OPTION_COMPRESS_DEBUG,
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OPTION_NOCOMPRESS_DEBUG,
OPTION_NO_PAD_SECTIONS /* = STD_BASE + 40 */
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/* When you add options here, check that they do
not collide with OPTION_MD_BASE. See as.h. */
};
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static const struct option std_longopts[] =
{
/* Note: commas are placed at the start of the line rather than
the end of the preceding line so that it is simpler to
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selectively add and remove lines from this list. */
{"alternate", no_argument, NULL, OPTION_ALTERNATE}
/* The entry for "a" is here to prevent getopt_long_only() from
considering that -a is an abbreviation for --alternate. This is
necessary because -a=<FILE> is a valid switch but getopt would
normally reject it since --alternate does not take an argument. */
,{"a", optional_argument, NULL, 'a'}
/* Handle -al=<FILE>. */
,{"al", optional_argument, NULL, OPTION_AL}
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,{"compress-debug-sections", optional_argument, NULL, OPTION_COMPRESS_DEBUG}
,{"nocompress-debug-sections", no_argument, NULL, OPTION_NOCOMPRESS_DEBUG}
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,{"debug-prefix-map", required_argument, NULL, OPTION_DEBUG_PREFIX_MAP}
,{"defsym", required_argument, NULL, OPTION_DEFSYM}
,{"dump-config", no_argument, NULL, OPTION_DUMPCONFIG}
,{"emulation", required_argument, NULL, OPTION_EMULATION}
#if defined OBJ_ELF || defined OBJ_MAYBE_ELF
,{"execstack", no_argument, NULL, OPTION_EXECSTACK}
,{"noexecstack", no_argument, NULL, OPTION_NOEXECSTACK}
,{"size-check", required_argument, NULL, OPTION_SIZE_CHECK}
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,{"elf-stt-common", required_argument, NULL, OPTION_ELF_STT_COMMON}
,{"sectname-subst", no_argument, NULL, OPTION_SECTNAME_SUBST}
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#endif
,{"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL}
,{"gdwarf-2", no_argument, NULL, OPTION_GDWARF2}
/* GCC uses --gdwarf-2 but GAS uses to use --gdwarf2,
so we keep it here for backwards compatibility. */
,{"gdwarf2", no_argument, NULL, OPTION_GDWARF2}
,{"gdwarf-sections", no_argument, NULL, OPTION_GDWARF_SECTIONS}
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,{"gen-debug", no_argument, NULL, 'g'}
,{"gstabs", no_argument, NULL, OPTION_GSTABS}
,{"gstabs+", no_argument, NULL, OPTION_GSTABS_PLUS}
,{"hash-size", required_argument, NULL, OPTION_HASH_TABLE_SIZE}
,{"help", no_argument, NULL, OPTION_HELP}
#ifdef HAVE_ITBL_CPU
/* New option for extending instruction set (see also -t above).
The "-t file" or "--itbl file" option extends the basic set of
valid instructions by reading "file", a text file containing a
list of instruction formats. The additional opcodes and their
formats are added to the built-in set of instructions, and
mnemonics for new registers may also be defined. */
,{"itbl", required_argument, NULL, 't'}
#endif
/* getopt allows abbreviations, so we do this to stop it from
treating -k as an abbreviation for --keep-locals. Some
ports use -k to enable PIC assembly. */
,{"keep-locals", no_argument, NULL, 'L'}
,{"keep-locals", no_argument, NULL, 'L'}
,{"listing-lhs-width", required_argument, NULL, OPTION_LISTING_LHS_WIDTH}
,{"listing-lhs-width2", required_argument, NULL, OPTION_LISTING_LHS_WIDTH2}
,{"listing-rhs-width", required_argument, NULL, OPTION_LISTING_RHS_WIDTH}
,{"listing-cont-lines", required_argument, NULL, OPTION_LISTING_CONT_LINES}
,{"MD", required_argument, NULL, OPTION_DEPFILE}
,{"mri", no_argument, NULL, 'M'}
,{"nocpp", no_argument, NULL, OPTION_NOCPP}
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,{"no-pad-sections", no_argument, NULL, OPTION_NO_PAD_SECTIONS}
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,{"no-warn", no_argument, NULL, 'W'}
,{"reduce-memory-overheads", no_argument, NULL, OPTION_REDUCE_MEMORY_OVERHEADS}
,{"statistics", no_argument, NULL, OPTION_STATISTICS}
,{"strip-local-absolute", no_argument, NULL, OPTION_STRIP_LOCAL_ABSOLUTE}
,{"version", no_argument, NULL, OPTION_VERSION}
,{"verbose", no_argument, NULL, OPTION_VERBOSE}
,{"target-help", no_argument, NULL, OPTION_TARGET_HELP}
,{"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT}
,{"warn", no_argument, NULL, OPTION_WARN}
};
/* Construct the option lists from the standard list and the target
dependent list. Include space for an extra NULL option and
always NULL terminate. */
shortopts = concat (std_shortopts, md_shortopts, (char *) NULL);
longopts = (struct option *) xmalloc (sizeof (std_longopts)
+ md_longopts_size + sizeof (struct option));
memcpy (longopts, std_longopts, sizeof (std_longopts));
memcpy (((char *) longopts) + sizeof (std_longopts), md_longopts, md_longopts_size);
memset (((char *) longopts) + sizeof (std_longopts) + md_longopts_size,
0, sizeof (struct option));
/* Make a local copy of the old argv. */
old_argc = *pargc;
old_argv = *pargv;
/* Initialize a new argv that contains no options. */
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new_argv = XNEWVEC (char *, old_argc + 1);
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new_argv[0] = old_argv[0];
new_argc = 1;
new_argv[new_argc] = NULL;
while (1)
{
/* getopt_long_only is like getopt_long, but '-' as well as '--' can
indicate a long option. */
int longind;
int optc = getopt_long_only (old_argc, old_argv, shortopts, longopts,
&longind);
if (optc == -1)
break;
switch (optc)
{
default:
/* md_parse_option should return 1 if it recognizes optc,
0 if not. */
if (md_parse_option (optc, optarg) != 0)
break;
/* `-v' isn't included in the general short_opts list, so check for
it explicitly here before deciding we've gotten a bad argument. */
if (optc == 'v')
{
#ifdef VMS
/* Telling getopt to treat -v's value as optional can result
in it picking up a following filename argument here. The
VMS code in md_parse_option can return 0 in that case,
but it has no way of pushing the filename argument back. */
if (optarg && *optarg)
new_argv[new_argc++] = optarg, new_argv[new_argc] = NULL;
else
#else
case 'v':
#endif
case OPTION_VERBOSE:
print_version_id ();
verbose = 1;
break;
}
else
as_bad (_("unrecognized option -%c%s"), optc, optarg ? optarg : "");
/* Fall through. */
case '?':
exit (EXIT_FAILURE);
case 1: /* File name. */
if (!strcmp (optarg, "-"))
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optarg = (char *) "";
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new_argv[new_argc++] = optarg;
new_argv[new_argc] = NULL;
break;
case OPTION_TARGET_HELP:
md_show_usage (stdout);
exit (EXIT_SUCCESS);
case OPTION_HELP:
show_usage (stdout);
exit (EXIT_SUCCESS);
case OPTION_NOCPP:
break;
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case OPTION_NO_PAD_SECTIONS:
do_not_pad_sections_to_alignment = 1;
break;
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case OPTION_STATISTICS:
flag_print_statistics = 1;
break;
case OPTION_STRIP_LOCAL_ABSOLUTE:
flag_strip_local_absolute = 1;
break;
case OPTION_TRADITIONAL_FORMAT:
flag_traditional_format = 1;
break;
case OPTION_VERSION:
/* This output is intended to follow the GNU standards document. */
printf (_("GNU assembler %s\n"), BFD_VERSION_STRING);
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printf (_("Copyright (C) 2017 Free Software Foundation, Inc.\n"));
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printf (_("\
This program is free software; you may redistribute it under the terms of\n\
the GNU General Public License version 3 or later.\n\
This program has absolutely no warranty.\n"));
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#ifdef TARGET_WITH_CPU
printf (_("This assembler was configured for a target of `%s' "
"and default,\ncpu type `%s'.\n"),
TARGET_ALIAS, TARGET_WITH_CPU);
#else
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printf (_("This assembler was configured for a target of `%s'.\n"),
TARGET_ALIAS);
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#endif
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exit (EXIT_SUCCESS);
case OPTION_EMULATION:
#ifdef USE_EMULATIONS
if (strcmp (optarg, this_emulation->name))
as_fatal (_("multiple emulation names specified"));
#else
as_fatal (_("emulations not handled in this configuration"));
#endif
break;
case OPTION_DUMPCONFIG:
fprintf (stderr, _("alias = %s\n"), TARGET_ALIAS);
fprintf (stderr, _("canonical = %s\n"), TARGET_CANONICAL);
fprintf (stderr, _("cpu-type = %s\n"), TARGET_CPU);
#ifdef TARGET_OBJ_FORMAT
fprintf (stderr, _("format = %s\n"), TARGET_OBJ_FORMAT);
#endif
#ifdef TARGET_FORMAT
fprintf (stderr, _("bfd-target = %s\n"), TARGET_FORMAT);
#endif
exit (EXIT_SUCCESS);
case OPTION_COMPRESS_DEBUG:
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if (optarg)
{
#if defined OBJ_ELF || defined OBJ_MAYBE_ELF
if (strcasecmp (optarg, "none") == 0)
flag_compress_debug = COMPRESS_DEBUG_NONE;
else if (strcasecmp (optarg, "zlib") == 0)
flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
else if (strcasecmp (optarg, "zlib-gnu") == 0)
flag_compress_debug = COMPRESS_DEBUG_GNU_ZLIB;
else if (strcasecmp (optarg, "zlib-gabi") == 0)
flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
else
as_fatal (_("Invalid --compress-debug-sections option: `%s'"),
optarg);
#else
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as_fatal (_("--compress-debug-sections=%s is unsupported"),
optarg);
#endif
}
else
flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
break;
case OPTION_NOCOMPRESS_DEBUG:
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flag_compress_debug = COMPRESS_DEBUG_NONE;
break;
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case OPTION_DEBUG_PREFIX_MAP:
add_debug_prefix_map (optarg);
break;
case OPTION_DEFSYM:
{
char *s;
valueT i;
struct defsym_list *n;
for (s = optarg; *s != '\0' && *s != '='; s++)
;
if (*s == '\0')
as_fatal (_("bad defsym; format is --defsym name=value"));
*s++ = '\0';
i = bfd_scan_vma (s, (const char **) NULL, 0);
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n = XNEW (struct defsym_list);
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n->next = defsyms;
n->name = optarg;
n->value = i;
defsyms = n;
}
break;
#ifdef HAVE_ITBL_CPU
case 't':
{
/* optarg is the name of the file containing the instruction
formats, opcodes, register names, etc. */
struct itbl_file_list *n;
if (optarg == NULL)
{
as_warn (_("no file name following -t option"));
break;
}
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n = XNEW (struct itbl_file_list);
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n->next = itbl_files;
n->name = optarg;
itbl_files = n;
/* Parse the file and add the new instructions to our internal
table. If multiple instruction tables are specified, the
information from this table gets appended onto the existing
internal table. */
itbl_files->name = xstrdup (optarg);
if (itbl_parse (itbl_files->name) != 0)
as_fatal (_("failed to read instruction table %s\n"),
itbl_files->name);
}
break;
#endif
case OPTION_DEPFILE:
start_dependencies (optarg);
break;
case 'g':
/* Some backends, eg Alpha and Mips, use the -g switch for their
own purposes. So we check here for an explicit -g and allow
the backend to decide if it wants to process it. */
if ( old_argv[optind - 1][1] == 'g'
&& md_parse_option (optc, optarg))
continue;
if (md_debug_format_selector)
debug_type = md_debug_format_selector (& use_gnu_debug_info_extensions);
else if (IS_ELF)
debug_type = DEBUG_DWARF2;
else
debug_type = DEBUG_STABS;
break;
case OPTION_GSTABS_PLUS:
use_gnu_debug_info_extensions = 1;
/* Fall through. */
case OPTION_GSTABS:
debug_type = DEBUG_STABS;
break;
case OPTION_GDWARF2:
debug_type = DEBUG_DWARF2;
break;
case OPTION_GDWARF_SECTIONS:
flag_dwarf_sections = TRUE;
break;
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case 'J':
flag_signed_overflow_ok = 1;
break;
#ifndef WORKING_DOT_WORD
case 'K':
flag_warn_displacement = 1;
break;
#endif
case 'L':
flag_keep_locals = 1;
break;
case OPTION_LISTING_LHS_WIDTH:
listing_lhs_width = atoi (optarg);
if (listing_lhs_width_second < listing_lhs_width)
listing_lhs_width_second = listing_lhs_width;
break;
case OPTION_LISTING_LHS_WIDTH2:
{
int tmp = atoi (optarg);
if (tmp > listing_lhs_width)
listing_lhs_width_second = tmp;
}
break;
case OPTION_LISTING_RHS_WIDTH:
listing_rhs_width = atoi (optarg);
break;
case OPTION_LISTING_CONT_LINES:
listing_lhs_cont_lines = atoi (optarg);
break;
case 'M':
flag_mri = 1;
#ifdef TC_M68K
flag_m68k_mri = 1;
#endif
break;
case 'R':
flag_readonly_data_in_text = 1;
break;
case 'W':
flag_no_warnings = 1;
break;
case OPTION_WARN:
flag_no_warnings = 0;
flag_fatal_warnings = 0;
break;
case OPTION_WARN_FATAL:
flag_no_warnings = 0;
flag_fatal_warnings = 1;
break;
#if defined OBJ_ELF || defined OBJ_MAYBE_ELF
case OPTION_EXECSTACK:
flag_execstack = 1;
flag_noexecstack = 0;
break;
case OPTION_NOEXECSTACK:
flag_noexecstack = 1;
flag_execstack = 0;
break;
case OPTION_SIZE_CHECK:
if (strcasecmp (optarg, "error") == 0)
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flag_allow_nonconst_size = FALSE;
else if (strcasecmp (optarg, "warning") == 0)
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flag_allow_nonconst_size = TRUE;
else
as_fatal (_("Invalid --size-check= option: `%s'"), optarg);
break;
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case OPTION_ELF_STT_COMMON:
if (strcasecmp (optarg, "no") == 0)
flag_use_elf_stt_common = 0;
else if (strcasecmp (optarg, "yes") == 0)
flag_use_elf_stt_common = 1;
else
as_fatal (_("Invalid --elf-stt-common= option: `%s'"),
optarg);
break;
case OPTION_SECTNAME_SUBST:
flag_sectname_subst = 1;
break;
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#endif
case 'Z':
flag_always_generate_output = 1;
break;
case OPTION_AL:
listing |= LISTING_LISTING;
if (optarg)
listing_filename = xstrdup (optarg);
break;
case OPTION_ALTERNATE:
optarg = old_argv [optind - 1];
while (* optarg == '-')
optarg ++;
if (strcmp (optarg, "alternate") == 0)
{
flag_macro_alternate = 1;
break;
}
optarg ++;
/* Fall through. */
case 'a':
if (optarg)
{
if (optarg != old_argv[optind] && optarg[-1] == '=')
--optarg;
if (md_parse_option (optc, optarg) != 0)
break;
while (*optarg)
{
switch (*optarg)
{
case 'c':
listing |= LISTING_NOCOND;
break;
case 'd':
listing |= LISTING_NODEBUG;
break;
case 'g':
listing |= LISTING_GENERAL;
break;
case 'h':
listing |= LISTING_HLL;
break;
case 'l':
listing |= LISTING_LISTING;
break;
case 'm':
listing |= LISTING_MACEXP;
break;
case 'n':
listing |= LISTING_NOFORM;
break;
case 's':
listing |= LISTING_SYMBOLS;
break;
case '=':
listing_filename = xstrdup (optarg + 1);
optarg += strlen (listing_filename);
break;
default:
as_fatal (_("invalid listing option `%c'"), *optarg);
break;
}
optarg++;
}
}
if (!listing)
listing = LISTING_DEFAULT;
break;
case 'D':
/* DEBUG is implemented: it debugs different
things from other people's assemblers. */
flag_debug = 1;
break;
case 'f':
flag_no_comments = 1;
break;
case 'I':
{ /* Include file directory. */
char *temp = xstrdup (optarg);
add_include_dir (temp);
break;
}
case 'o':
out_file_name = xstrdup (optarg);
break;
case 'w':
break;
case 'X':
/* -X means treat warnings as errors. */
break;
case OPTION_REDUCE_MEMORY_OVERHEADS:
/* The only change we make at the moment is to reduce
the size of the hash tables that we use. */
set_gas_hash_table_size (4051);
break;
case OPTION_HASH_TABLE_SIZE:
{
unsigned long new_size;
new_size = strtoul (optarg, NULL, 0);
if (new_size)
set_gas_hash_table_size (new_size);
else
as_fatal (_("--hash-size needs a numeric argument"));
break;
}
}
}
free (shortopts);
free (longopts);
*pargc = new_argc;
*pargv = new_argv;
#ifdef md_after_parse_args
md_after_parse_args ();
#endif
}
static void
dump_statistics (void)
{
#ifdef HAVE_SBRK
char *lim = (char *) sbrk (0);
#endif
long run_time = get_run_time () - start_time;
fprintf (stderr, _("%s: total time in assembly: %ld.%06ld\n"),
myname, run_time / 1000000, run_time % 1000000);
#ifdef HAVE_SBRK
fprintf (stderr, _("%s: data size %ld\n"),
myname, (long) (lim - start_sbrk));
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#endif
subsegs_print_statistics (stderr);
write_print_statistics (stderr);
symbol_print_statistics (stderr);
read_print_statistics (stderr);
#ifdef tc_print_statistics
tc_print_statistics (stderr);
#endif
#ifdef obj_print_statistics
obj_print_statistics (stderr);
#endif
}
static void
close_output_file (void)
{
output_file_close (out_file_name);
if (!keep_it)
unlink_if_ordinary (out_file_name);
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}
/* The interface between the macro code and gas expression handling. */
static size_t
macro_expr (const char *emsg, size_t idx, sb *in, offsetT *val)
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{
char *hold;
expressionS ex;
sb_terminate (in);
hold = input_line_pointer;
input_line_pointer = in->ptr + idx;
expression_and_evaluate (&ex);
idx = input_line_pointer - in->ptr;
input_line_pointer = hold;
if (ex.X_op != O_constant)
as_bad ("%s", emsg);
*val = ex.X_add_number;
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return idx;
}
/* Here to attempt 1 pass over each input file.
We scan argv[*] looking for filenames or exactly "" which is
shorthand for stdin. Any argv that is NULL is not a file-name.
We set need_pass_2 TRUE if, after this, we still have unresolved
expressions of the form (unknown value)+-(unknown value).
Note the un*x semantics: there is only 1 logical input file, but it
may be a catenation of many 'physical' input files. */
static void
perform_an_assembly_pass (int argc, char ** argv)
{
int saw_a_file = 0;
#ifndef OBJ_MACH_O
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flagword applicable;
#endif
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need_pass_2 = 0;
#ifndef OBJ_MACH_O
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/* Create the standard sections, and those the assembler uses
internally. */
text_section = subseg_new (TEXT_SECTION_NAME, 0);
data_section = subseg_new (DATA_SECTION_NAME, 0);
bss_section = subseg_new (BSS_SECTION_NAME, 0);
/* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
to have relocs, otherwise we don't find out in time. */
applicable = bfd_applicable_section_flags (stdoutput);
bfd_set_section_flags (stdoutput, text_section,
applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
| SEC_CODE | SEC_READONLY));
bfd_set_section_flags (stdoutput, data_section,
applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC
| SEC_DATA));
bfd_set_section_flags (stdoutput, bss_section, applicable & SEC_ALLOC);
seg_info (bss_section)->bss = 1;
#endif
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subseg_new (BFD_ABS_SECTION_NAME, 0);
subseg_new (BFD_UND_SECTION_NAME, 0);
reg_section = subseg_new ("*GAS `reg' section*", 0);
expr_section = subseg_new ("*GAS `expr' section*", 0);
#ifndef OBJ_MACH_O
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subseg_set (text_section, 0);
#endif
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/* This may add symbol table entries, which requires having an open BFD,
and sections already created. */
md_begin ();
#ifdef USING_CGEN
gas_cgen_begin ();
#endif
#ifdef obj_begin
obj_begin ();
#endif
/* Skip argv[0]. */
argv++;
argc--;
while (argc--)
{
if (*argv)
{ /* Is it a file-name argument? */
PROGRESS (1);
saw_a_file++;
/* argv->"" if stdin desired, else->filename. */
read_a_source_file (*argv);
}
argv++; /* Completed that argv. */
}
if (!saw_a_file)
read_a_source_file ("");
}
int
main (int argc, char ** argv)
{
char ** argv_orig = argv;
int macro_strip_at;
start_time = get_run_time ();
signal_init ();
#ifdef HAVE_SBRK
start_sbrk = (char *) sbrk (0);
#endif
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#if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
setlocale (LC_MESSAGES, "");
#endif
#if defined (HAVE_SETLOCALE)
setlocale (LC_CTYPE, "");
#endif
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
if (debug_memory)
chunksize = 64;
#ifdef HOST_SPECIAL_INIT
HOST_SPECIAL_INIT (argc, argv);
#endif
myname = argv[0];
xmalloc_set_program_name (myname);
expandargv (&argc, &argv);
START_PROGRESS (myname, 0);
#ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
#define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
#endif
out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME;
hex_init ();
bfd_init ();
bfd_set_error_program_name (myname);
#ifdef USE_EMULATIONS
select_emulation_mode (argc, argv);
#endif
PROGRESS (1);
/* Call parse_args before any of the init/begin functions
so that switches like --hash-size can be honored. */
parse_args (&argc, &argv);
symbol_begin ();
frag_init ();
subsegs_begin ();
read_begin ();
input_scrub_begin ();
expr_begin ();
/* It has to be called after dump_statistics (). */
xatexit (close_output_file);
if (flag_print_statistics)
xatexit (dump_statistics);
macro_strip_at = 0;
#ifdef TC_I960
macro_strip_at = flag_mri;
#endif
macro_init (flag_macro_alternate, flag_mri, macro_strip_at, macro_expr);
PROGRESS (1);
output_file_create (out_file_name);
gas_assert (stdoutput != 0);
dot_symbol_init ();
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#ifdef tc_init_after_args
tc_init_after_args ();
#endif
itbl_init ();
dwarf2_init ();
local_symbol_make (".gasversion.", absolute_section,
BFD_VERSION / 10000UL, &predefined_address_frag);
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/* Now that we have fully initialized, and have created the output
file, define any symbols requested by --defsym command line
arguments. */
while (defsyms != NULL)
{
symbolS *sym;
struct defsym_list *next;
sym = symbol_new (defsyms->name, absolute_section, defsyms->value,
&zero_address_frag);
/* Make symbols defined on the command line volatile, so that they
can be redefined inside a source file. This makes this assembler's
behaviour compatible with earlier versions, but it may not be
completely intuitive. */
S_SET_VOLATILE (sym);
symbol_table_insert (sym);
next = defsyms->next;
free (defsyms);
defsyms = next;
}
PROGRESS (1);
/* Assemble it. */
perform_an_assembly_pass (argc, argv);
cond_finish_check (-1);
#ifdef md_end
md_end ();
#endif
#if defined OBJ_ELF || defined OBJ_MAYBE_ELF
if ((flag_execstack || flag_noexecstack)
&& OUTPUT_FLAVOR == bfd_target_elf_flavour)
{
segT gnustack;
gnustack = subseg_new (".note.GNU-stack", 0);
bfd_set_section_flags (stdoutput, gnustack,
SEC_READONLY | (flag_execstack ? SEC_CODE : 0));
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}
#endif
/* If we've been collecting dwarf2 .debug_line info, either for
assembly debugging or on behalf of the compiler, emit it now. */
dwarf2_finish ();
/* If we constructed dwarf2 .eh_frame info, either via .cfi
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directives from the user or by the backend, emit it now. */
cfi_finish ();
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keep_it = 0;
if (seen_at_least_1_file ())
{
int n_warns, n_errs;
char warn_msg[50];
char err_msg[50];
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2015-08-28 15:32:19 +00:00
write_object_file ();
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2015-08-28 15:32:19 +00:00
n_warns = had_warnings ();
n_errs = had_errors ();
if (n_warns == 1)
sprintf (warn_msg, _("%d warning"), n_warns);
else
sprintf (warn_msg, _("%d warnings"), n_warns);
if (n_errs == 1)
sprintf (err_msg, _("%d error"), n_errs);
else
sprintf (err_msg, _("%d errors"), n_errs);
if (flag_fatal_warnings && n_warns != 0)
{
if (n_errs == 0)
as_bad (_("%s, treating warnings as errors"), warn_msg);
n_errs += n_warns;
}
if (n_errs == 0)
keep_it = 1;
else if (flag_always_generate_output)
{
/* The -Z flag indicates that an object file should be generated,
regardless of warnings and errors. */
keep_it = 1;
fprintf (stderr, _("%s, %s, generating bad object file\n"),
err_msg, warn_msg);
}
}
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fflush (stderr);
#ifndef NO_LISTING
listing_print (listing_filename, argv_orig);
#endif
input_scrub_end ();
END_PROGRESS (myname);
/* Use xexit instead of return, because under VMS environments they
may not place the same interpretation on the value given. */
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if (had_errors () != 0)
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xexit (EXIT_FAILURE);
/* Only generate dependency file if assembler was successful. */
print_dependencies ();
xexit (EXIT_SUCCESS);
}