563 lines
14 KiB
C
563 lines
14 KiB
C
/* as.c - GAS main program.
|
||
Copyright (C) 1987, 1990, 1991, 1992, 1994 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, 675 Mass Ave, Cambridge, MA 02139, 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.
|
||
*
|
||
*
|
||
* bugs
|
||
*
|
||
* : initialisers
|
||
* Since no-one else says they will support them in future: I
|
||
* don't support them now.
|
||
*
|
||
*/
|
||
|
||
#include "ansidecl.h"
|
||
#include "libiberty.h"
|
||
|
||
#define COMMON
|
||
|
||
#include "as.h"
|
||
#include "subsegs.h"
|
||
#include "output-file.h"
|
||
|
||
static void perform_an_assembly_pass PARAMS ((int argc, char **argv));
|
||
|
||
int listing; /* true if a listing is wanted */
|
||
|
||
char *myname; /* argv[0] */
|
||
#ifdef BFD_ASSEMBLER
|
||
segT reg_section, expr_section;
|
||
segT text_section, data_section, bss_section;
|
||
#endif
|
||
|
||
|
||
void
|
||
print_version_id ()
|
||
{
|
||
static int printed;
|
||
if (printed)
|
||
return;
|
||
printed = 1;
|
||
|
||
fprintf (stderr, "GNU assembler version %s (%s)", GAS_VERSION, TARGET_ALIAS);
|
||
#ifdef BFD_ASSEMBLER
|
||
fprintf (stderr, ", using BFD version %s", BFD_VERSION);
|
||
#endif
|
||
fprintf (stderr, "\n");
|
||
}
|
||
|
||
void
|
||
show_usage (stream)
|
||
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\
|
||
d omit debugging directives\n\
|
||
h include high-level source\n\
|
||
l include assembly\n\
|
||
n omit forms processing\n\
|
||
s include symbols\n");
|
||
fprintf (stream, "\
|
||
-D produce assembler debugging messages\n\
|
||
-f skip whitespace and comment preprocessing\n\
|
||
--help show this message and exit\n\
|
||
-I DIR add DIR to search list for .include directives\n\
|
||
-J don't warn about signed overflow\n\
|
||
-K warn when differences altered for long displacements\n\
|
||
-L keep local symbols (starting with `L')\n");
|
||
fprintf (stream, "\
|
||
-nocpp ignored\n\
|
||
-o OBJFILE name the object-file output OBJFILE (default a.out)\n\
|
||
-R fold data section into text section\n\
|
||
--statistics print maximum bytes and total seconds used\n\
|
||
--version print assembler version number and exit\n\
|
||
-W suppress warnings\n\
|
||
-w ignored\n\
|
||
-X ignored\n\
|
||
-Z generate object file even after errors\n");
|
||
|
||
md_show_usage (stream);
|
||
}
|
||
|
||
/*
|
||
* 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
|
||
*/
|
||
|
||
void
|
||
parse_args (pargc, pargv)
|
||
int *pargc;
|
||
char ***pargv;
|
||
{
|
||
int old_argc, new_argc;
|
||
char **old_argv, **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;
|
||
#ifdef VMS
|
||
/* -v takes an argument on VMS, so we don't make it a generic option. */
|
||
CONST char *std_shortopts = "-JKLRWZfa::DI:o:wX";
|
||
#else
|
||
CONST char *std_shortopts = "-JKLRWZfa::DI:o:vwX";
|
||
#endif
|
||
|
||
struct option *longopts;
|
||
extern struct option md_longopts[];
|
||
extern size_t md_longopts_size;
|
||
static const struct option std_longopts[] = {
|
||
#define OPTION_HELP (OPTION_STD_BASE)
|
||
{"help", no_argument, NULL, OPTION_HELP},
|
||
#define OPTION_NOCPP (OPTION_STD_BASE + 1)
|
||
{"nocpp", no_argument, NULL, OPTION_NOCPP},
|
||
#define OPTION_STATISTICS (OPTION_STD_BASE + 2)
|
||
{"statistics", no_argument, NULL, OPTION_STATISTICS},
|
||
#define OPTION_VERSION (OPTION_STD_BASE + 3)
|
||
{"version", no_argument, NULL, OPTION_VERSION},
|
||
#define OPTION_DUMPCONFIG (OPTION_STD_BASE + 4)
|
||
{"dump-config", no_argument, NULL, OPTION_DUMPCONFIG},
|
||
#define OPTION_VERBOSE (OPTION_STD_BASE + 5)
|
||
{"verbose", no_argument, NULL, OPTION_VERBOSE},
|
||
};
|
||
|
||
/* Construct the option lists from the standard list and the
|
||
target dependent list. */
|
||
shortopts = concat (std_shortopts, md_shortopts, (char *) NULL);
|
||
longopts = (struct option *) xmalloc (sizeof (std_longopts) + md_longopts_size);
|
||
memcpy (longopts, std_longopts, sizeof (std_longopts));
|
||
memcpy ((char *) longopts + sizeof (std_longopts),
|
||
md_longopts, md_longopts_size);
|
||
|
||
/* Make a local copy of the old argv. */
|
||
old_argc = *pargc;
|
||
old_argv = *pargv;
|
||
|
||
/* Initialize a new argv that contains no options. */
|
||
new_argv = (char **) xmalloc (sizeof (char *) * (old_argc + 1));
|
||
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 explicity 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 ();
|
||
break;
|
||
}
|
||
/*FALLTHRU*/
|
||
|
||
case '?':
|
||
exit (EXIT_FAILURE);
|
||
|
||
case 1: /* File name. */
|
||
if (!strcmp (optarg, "-"))
|
||
optarg = "";
|
||
new_argv[new_argc++] = optarg;
|
||
new_argv[new_argc] = NULL;
|
||
break;
|
||
|
||
case OPTION_HELP:
|
||
show_usage (stdout);
|
||
exit (EXIT_SUCCESS);
|
||
|
||
case OPTION_NOCPP:
|
||
break;
|
||
|
||
case OPTION_STATISTICS:
|
||
flag_print_statistics = 1;
|
||
break;
|
||
|
||
case OPTION_VERSION:
|
||
print_version_id ();
|
||
exit (EXIT_SUCCESS);
|
||
|
||
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 'J':
|
||
flag_signed_overflow_ok = 1;
|
||
break;
|
||
|
||
case 'K':
|
||
flag_warn_displacement = 1;
|
||
break;
|
||
|
||
case 'L':
|
||
flag_keep_locals = 1;
|
||
break;
|
||
|
||
case 'R':
|
||
flag_readonly_data_in_text = 1;
|
||
break;
|
||
|
||
case 'W':
|
||
flag_no_warnings = 1;
|
||
break;
|
||
|
||
case 'Z':
|
||
flag_always_generate_output = 1;
|
||
break;
|
||
|
||
case 'a':
|
||
if (optarg)
|
||
{
|
||
while (*optarg)
|
||
{
|
||
switch (*optarg)
|
||
{
|
||
case 'd':
|
||
listing |= LISTING_NODEBUG;
|
||
break;
|
||
case 'h':
|
||
listing |= LISTING_HLL;
|
||
break;
|
||
case 'l':
|
||
listing |= LISTING_LISTING;
|
||
break;
|
||
case 'n':
|
||
listing |= LISTING_NOFORM;
|
||
break;
|
||
case 's':
|
||
listing |= LISTING_SYMBOLS;
|
||
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 = strdup (optarg);
|
||
if (!temp)
|
||
as_fatal ("virtual memory exhausted");
|
||
add_include_dir (temp);
|
||
break;
|
||
}
|
||
|
||
case 'o':
|
||
out_file_name = strdup (optarg);
|
||
if (!out_file_name)
|
||
as_fatal ("virtual memory exhausted");
|
||
break;
|
||
|
||
case 'w':
|
||
break;
|
||
|
||
case 'X':
|
||
/* -X means treat warnings as errors */
|
||
break;
|
||
}
|
||
}
|
||
|
||
free (shortopts);
|
||
free (longopts);
|
||
|
||
*pargc = new_argc;
|
||
*pargv = new_argv;
|
||
}
|
||
|
||
int
|
||
main (argc, argv)
|
||
int argc;
|
||
char **argv;
|
||
{
|
||
int keep_it;
|
||
long start_time = get_run_time ();
|
||
|
||
#ifdef HOST_SPECIAL_INIT
|
||
HOST_SPECIAL_INIT (argc, argv);
|
||
#endif
|
||
|
||
myname = argv[0];
|
||
xmalloc_set_program_name (myname);
|
||
|
||
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;
|
||
|
||
#ifdef BFD_ASSEMBLER
|
||
bfd_init ();
|
||
#endif
|
||
|
||
PROGRESS (1);
|
||
symbol_begin ();
|
||
frag_init ();
|
||
subsegs_begin ();
|
||
read_begin ();
|
||
input_scrub_begin ();
|
||
PROGRESS (1);
|
||
parse_args (&argc, &argv);
|
||
|
||
PROGRESS (1);
|
||
|
||
#ifdef BFD_ASSEMBLER
|
||
output_file_create (out_file_name);
|
||
assert (stdoutput != 0);
|
||
#endif
|
||
|
||
#ifdef tc_init_after_args
|
||
tc_init_after_args ();
|
||
#endif
|
||
|
||
PROGRESS (1);
|
||
|
||
perform_an_assembly_pass (argc, argv); /* Assemble it. */
|
||
#ifdef TC_I960
|
||
brtab_emit ();
|
||
#endif
|
||
/* start-sanitize-rce */
|
||
#ifdef TC_RCE
|
||
dump_literals(0);
|
||
#endif
|
||
/* end-sanitize-rce */
|
||
|
||
if (seen_at_least_1_file ()
|
||
&& !((had_warnings () && flag_always_generate_output)
|
||
|| had_errors () > 0))
|
||
keep_it = 1;
|
||
else
|
||
keep_it = 0;
|
||
|
||
if (keep_it)
|
||
write_object_file ();
|
||
|
||
#ifndef NO_LISTING
|
||
listing_print ("");
|
||
#endif
|
||
|
||
#ifndef OBJ_VMS /* does its own file handling */
|
||
#ifndef BFD_ASSEMBLER
|
||
if (keep_it)
|
||
#endif
|
||
output_file_close (out_file_name);
|
||
#endif
|
||
|
||
if (!keep_it)
|
||
unlink (out_file_name);
|
||
|
||
input_scrub_end ();
|
||
#ifdef md_end
|
||
md_end ();
|
||
#endif
|
||
|
||
END_PROGRESS (myname);
|
||
|
||
if (flag_print_statistics)
|
||
{
|
||
extern char **environ;
|
||
char *lim = (char *) sbrk (0);
|
||
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);
|
||
fprintf (stderr, "%s: data size %ld\n",
|
||
myname, (long) (lim - (char *) &environ));
|
||
}
|
||
|
||
/* Use exit instead of return, because under VMS environments they
|
||
may not place the same interpretation on the value given. */
|
||
if ((had_warnings () && flag_always_generate_output)
|
||
|| had_errors () > 0)
|
||
exit (EXIT_FAILURE);
|
||
exit (EXIT_SUCCESS);
|
||
}
|
||
|
||
|
||
/* perform_an_assembly_pass()
|
||
*
|
||
* 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 (argc, argv)
|
||
int argc;
|
||
char **argv;
|
||
{
|
||
int saw_a_file = 0;
|
||
#ifdef BFD_ASSEMBLER
|
||
flagword applicable;
|
||
#endif
|
||
|
||
need_pass_2 = 0;
|
||
|
||
#ifndef BFD_ASSEMBLER
|
||
#ifdef MANY_SEGMENTS
|
||
{
|
||
unsigned int i;
|
||
for (i = SEG_E0; i < SEG_UNKNOWN; i++)
|
||
segment_info[i].fix_root = 0;
|
||
}
|
||
/* Create the three fixed ones */
|
||
{
|
||
segT seg;
|
||
|
||
#ifdef TE_APOLLO
|
||
seg = subseg_new (".wtext", 0);
|
||
#else
|
||
seg = subseg_new (".text", 0);
|
||
#endif
|
||
assert (seg == SEG_E0);
|
||
seg = subseg_new (".data", 0);
|
||
assert (seg == SEG_E1);
|
||
seg = subseg_new (".bss", 0);
|
||
assert (seg == SEG_E2);
|
||
#ifdef TE_APOLLO
|
||
create_target_segments ();
|
||
#endif
|
||
}
|
||
|
||
#else /* not MANY_SEGMENTS */
|
||
text_fix_root = NULL;
|
||
data_fix_root = NULL;
|
||
bss_fix_root = NULL;
|
||
#endif /* not MANY_SEGMENTS */
|
||
#else /* BFD_ASSEMBLER */
|
||
/* Create the standard sections, and those the assembler uses
|
||
internally. */
|
||
text_section = subseg_new (".text", 0);
|
||
data_section = subseg_new (".data", 0);
|
||
bss_section = subseg_new (".bss", 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));
|
||
/* @@ FIXME -- SEC_CODE seems to mean code only, rather than code possibly.*/
|
||
bfd_set_section_flags (stdoutput, data_section,
|
||
applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC));
|
||
bfd_set_section_flags (stdoutput, bss_section, applicable & SEC_ALLOC);
|
||
seg_info (bss_section)->bss = 1;
|
||
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);
|
||
|
||
#endif /* BFD_ASSEMBLER */
|
||
|
||
subseg_set (text_section, 0);
|
||
|
||
/* This may add symbol table entries, which requires having an open BFD,
|
||
and sections already created, in BFD_ASSEMBLER mode. */
|
||
md_begin ();
|
||
|
||
argv++; /* skip argv[0] */
|
||
argc--; /* skip argv[0] */
|
||
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 ("");
|
||
} /* perform_an_assembly_pass() */
|
||
|
||
/* end of as.c */
|