[deliverable/binutils-gdb.git] / gas / as.c

/* as.c - GAS main program.
   Copyright (C) 1987, 1990, 1991, 1992 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 <stdio.h>
#include <string.h>

#ifdef _POSIX_SOURCE
#include <sys/types.h>		/* For pid_t in signal.h */
#endif
#include <signal.h>

#define COMMON

#include "as.h"
#include "config.h"
#include "subsegs.h"

#if __STDC__ == 1

/* This prototype for got_sig() is ansi.  If you want
   anything else, then your compiler is lying to you when
   it says that it is __STDC__.  If you want to change it,
   #ifdef protect it from those of us with real ansi
   compilers. */

#define SIGTY void

static void got_sig (int sig);
static void perform_an_assembly_pass (int argc, char **argv);

#else /* __STDC__ */

#ifndef SIGTY
#define SIGTY int
#endif

static SIGTY got_sig ();
static void perform_an_assembly_pass ();

#endif /* not __STDC__ */

#ifndef EXIT_SUCCESS
#define EXIT_SUCCESS 0
#define EXIT_FAILURE 1
#endif

int listing;			/* true if a listing is wanted */

char *myname;			/* argv[0] */
#ifdef BFD_ASSEMBLER
segT big_section, reg_section, pass1_section;
segT diff_section, absent_section;
segT text_section, data_section, bss_section;
#endif
\f
int 
main (argc, argv)
     int argc;
     char **argv;
{
  int work_argc;		/* variable copy of argc */
  char **work_argv;		/* variable copy of argv */
  char *arg;			/* an arg to program */
  char a;			/* an arg flag (after -) */

#if 0 /* do we need any of this?? */
  {
    static const int sig[] = {SIGHUP, SIGINT, SIGPIPE, SIGTERM, 0};

    for (a = 0; sig[a] != 0; a++)
      if (signal (sig[a], SIG_IGN) != SIG_IGN)
	signal (sig[a], got_sig);
  }
#endif

  myname = argv[0];
  memset (flagseen, '\0', sizeof (flagseen));	/* aint seen nothing yet */
#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

  symbol_begin ();
  subsegs_begin ();
  read_begin ();
  md_begin ();
  input_scrub_begin ();
  frag_init ();
  /*
   * Parse arguments, but we are only interested in flags.
   * When we find a flag, we process it then make it's argv[] NULL.
   * This helps any future argv[] scanners avoid what we processed.
   * 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.
   */
  /* FIXME-SOMEDAY this should use getopt. */
  work_argc = argc - 1;		/* don't count argv[0] */
  work_argv = argv + 1;		/* skip argv[0] */
  for (; work_argc--; work_argv++)
    {
      arg = *work_argv;		/* work_argv points to this argument */

      if (*arg != '-')		/* Filename. We need it later. */
	continue;		/* Keep scanning args looking for flags. */
      if (arg[1] == '-' && arg[2] == 0)
	{
	  /* "--" as an argument means read STDIN */
	  /* on this scan, we don't want to think about filenames */
	  *work_argv = "";	/* Code that means 'use stdin'. */
	  continue;
	}
      /* This better be a switch. */
      arg++;			/*->letter. */

      while ((a = *arg) != '\0')
	{			/* scan all the 1-char flags */
	  arg++;		/* arg->after letter. */
	  a &= 0x7F;		/* ascii only please */
	  flagseen[a] = 1;
	  switch (a)
	    {
	    case 'a':
	      {
		int loop = 1;

		while (loop)
		  {
		    switch (*arg)
		      {
		      case 'l':
			listing |= LISTING_LISTING;
			arg++;
			break;
		      case 's':
			listing |= LISTING_SYMBOLS;
			arg++;
			break;
		      case 'h':
			listing |= LISTING_HLL;
			arg++;
			break;

		      case 'n':
			listing |= LISTING_NOFORM;
			arg++;
			break;
		      case 'd':
			listing |= LISTING_NODEBUG;
			arg++;
			break;
		      default:
			if (!listing)
			  listing = LISTING_DEFAULT;
			loop = 0;
			break;
		      }
		  }
	      }

	      break;


	    case 'f':
	      break;		/* -f means fast - no need for "app" preprocessor. */

	    case 'D':
	      /* DEBUG is implemented: it debugs different */
	      /* things to other people's assemblers. */
	      break;

	    case 'I':
	      {			/* Include file directory */

		char *temp = NULL;
		if (*arg)
		  {
		    temp = strdup (arg);
		    if (!temp)
		      as_fatal ("virtual memory exhuasted");
		  }
		else if (work_argc)
		  {
		    *work_argv = NULL;
		    work_argc--;
		    temp = *++work_argv;
		  }
		else
		  as_warn ("%s: I expected a filename after -I", myname);
		add_include_dir (temp);
		arg = "";	/* Finished with this arg. */
		break;
	      }

#ifdef WARN_SIGNED_OVERFLOW_WORD
	      /* Don't warn about signed overflow.  */
	    case 'J':
	      break;
#endif

#ifndef WORKING_DOT_WORD
	    case 'K':
	      break;
#endif

	    case 'L':		/* -L means keep L* symbols */
	      break;

	    case 'o':
	      if (*arg)		/* Rest of argument is object file-name. */
		{
		  out_file_name = strdup (arg);
		  if (!out_file_name)
		    as_fatal ("virtual memory exhausted");
		}
	      else if (work_argc)
		{		/* Want next arg for a file-name. */
		  *work_argv = NULL;	/* This is not a file-name. */
		  work_argc--;
		  out_file_name = *++work_argv;
		}
	      else
		as_warn ("%s: I expected a filename after -o. \"%s\" assumed.",
			 myname, out_file_name);
	      arg = "";		/* Finished with this arg. */
	      break;

	    case 'R':
	      /* -R means put data into text segment */
	      flag_readonly_data_in_text = 1;
	      break;

	    case 'v':
#ifdef	VMS
	      {
		extern char *compiler_version_string;
		compiler_version_string = arg;
	      }
#else /* not VMS */
	      if (*arg && strcmp (arg, "ersion"))
		{
		  as_warn ("Unknown -v option ignored");
		  arg += strlen (arg);
		  break;
		}

	      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");
#endif /* not VMS */
	      while (*arg)
		arg++;		/* Skip the rest */
	      break;

	    case 'W':
	      /* -W means don't warn about things */
	      flag_suppress_warnings = 1;
	      break;

	    case 'w':
	    case 'X':
	      /* -X means treat warnings as errors */
	      break;
	    case 'Z':
	      /* -Z means attempt to generate object file even after errors. */
	      flag_always_generate_output = 1;
	      break;

	    default:
	      --arg;
	      if (md_parse_option (&arg, &work_argc, &work_argv) == 0)
		as_warn ("%s: I don't understand '%c' flag.", myname, a);
	      if (arg && *arg)
		arg++;
	      break;
	    }
	}
      /*
       * We have just processed a "-..." arg, which was not a
       * file-name. Smash it so the
       * things that look for filenames won't ever see it.
       *
       * Whatever work_argv points to, it has already been used
       * as part of a flag, so DON'T re-use it as a filename.
       */
      *work_argv = NULL;	/* NULL means 'not a file-name' */
    }

#ifdef BFD_ASSEMBLER
  output_file_create (out_file_name);
  assert (stdoutput != 0);
#endif

  /* Here with flags set up in flagseen[]. */
  perform_an_assembly_pass (argc, argv);	/* Assemble it. */
#ifdef TC_I960
  brtab_emit ();
#endif
  if (seen_at_least_1_file ()
      && !((had_warnings () && flag_always_generate_output)
	   || had_errors () > 0))
    {
      write_object_file ();	/* relax() addresses then emit object file */
    }				/* we also check in write_object_file() just before emit. */

  input_scrub_end ();
  md_end ();			/* MACHINE.c */

#ifndef NO_LISTING
  listing_print ("");
#endif

  if ((had_warnings () && flagseen['Z'])
      || had_errors () > 0)
    return EXIT_FAILURE;
  return EXIT_SUCCESS;
}
\f

/*			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;
  unsigned int i;
#ifdef BFD_ASSEMBLER
  flagword applicable;
#endif

  need_pass_2 = 0;

#ifndef BFD_ASSEMBLER
#ifdef MANY_SEGMENTS
  for (i = SEG_E0; i < SEG_UNKNOWN; i++)
    {
      segment_info[i].fix_root = 0;
    }
  /* Create the three fixed ones */
  subseg_new (SEG_E0, 0);
  subseg_new (SEG_E1, 0);
  subseg_new (SEG_E2, 0);
  strcpy (segment_info[SEG_E0].scnhdr.s_name, ".text");
  strcpy (segment_info[SEG_E1].scnhdr.s_name, ".data");
  strcpy (segment_info[SEG_E2].scnhdr.s_name, ".bss");

  subseg_new (SEG_E0, 0);
#else /* not MANY_SEGMENTS */
  text_fix_root = NULL;
  data_fix_root = NULL;
  bss_fix_root = NULL;

  subseg_new (SEG_TEXT, 0);
#endif /* not MANY_SEGMENTS */
#else /* BFD_ASSEMBLER */
  /* Create the standard sections, and those the assembler uses
     internally.  */
  text_section = subseg_new (".text", 0);
  text_section->output_section = text_section;
  data_section = subseg_new (".data", 0);
  data_section->output_section = data_section;
  bss_section = subseg_new (".bss", 0);
  bss_section->output_section = bss_section;
  /* @@ 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);
  subseg_new (BFD_ABS_SECTION_NAME, 0);
  subseg_new (BFD_UND_SECTION_NAME, 0);
  big_section = subseg_new ("*GAS `big' section*", 0);
  reg_section = subseg_new ("*GAS `reg' section*", 0);
  pass1_section = subseg_new ("*GAS `pass1' section*", 0);
  diff_section = subseg_new ("*GAS `diff' section*", 0);
  absent_section = subseg_new ("*GAS `absent' section*", 0);

  subseg_new (".text", 0);
#endif /* BFD_ASSEMBLER */

  argv++;			/* skip argv[0] */
  argc--;			/* skip argv[0] */
  while (argc--)
    {
      if (*argv)
	{			/* Is it a file-name argument? */
	  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() */
\f
static SIGTY
got_sig (sig)
     int sig;
{
  static here_before = 0;

  as_bad ("Interrupted by signal %d", sig);
  if (here_before++)
    exit (EXIT_FAILURE);
  return ((SIGTY) 0);
}

/* end of as.c */
Commit	Line	Data
fecd2382	1	/* as.c - GAS main program.
3340f7e5	2	Copyright (C) 1987, 1990, 1991, 1992 Free Software Foundation, Inc.
6efd877d	3
a39116f1	4	This file is part of GAS, the GNU Assembler.
6efd877d	5
a39116f1 RP	6	GAS is free software; you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as published by
	8	the Free Software Foundation; either version 2, or (at your option)
	9	any later version.
6efd877d	10
a39116f1 RP	11	GAS is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
6efd877d	15
a39116f1 RP	16	You should have received a copy of the GNU General Public License
	17	along with GAS; see the file COPYING. If not, write to
	18	the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
fecd2382 RP	19
	20	/*
	21	* Main program for AS; a 32-bit assembler of GNU.
	22	* Understands command arguments.
	23	* Has a few routines that don't fit in other modules because they
	24	* are shared.
	25	*
	26	*
	27	* bugs
	28	*
	29	* : initialisers
	30	* Since no-one else says they will support them in future: I
	31	* don't support them now.
	32	*
	33	*/
	34
	35	#include <stdio.h>
	36	#include <string.h>
	37
	38	#ifdef _POSIX_SOURCE
6efd877d	39	#include <sys/types.h> /* For pid_t in signal.h */
fecd2382 RP	40	#endif
	41	#include <signal.h>
	42
	43	#define COMMON
	44
	45	#include "as.h"
d3038350	46	#include "config.h"
5d9f0ecf	47	#include "subsegs.h"
d3038350	48
3340f7e5	49	#if __STDC__ == 1
fecd2382	50
a39116f1 RP	51	/* This prototype for got_sig() is ansi. If you want
	52	anything else, then your compiler is lying to you when
	53	it says that it is __STDC__. If you want to change it,
	54	#ifdef protect it from those of us with real ansi
	55	compilers. */
fecd2382 RP	56
	57	#define SIGTY void
	58
6efd877d	59	static void got_sig (int sig);
6efd877d	60	static void perform_an_assembly_pass (int argc, char **argv);
fecd2382 RP	61
	62	#else /* __STDC__ */
	63
	64	#ifndef SIGTY
	65	#define SIGTY int
	66	#endif
	67
6efd877d	68	static SIGTY got_sig ();
6efd877d	69	static void perform_an_assembly_pass ();
fecd2382	70
3340f7e5	71	#endif /* not __STDC__ */
fecd2382	72
d3038350 KR	73	#ifndef EXIT_SUCCESS
	74	#define EXIT_SUCCESS 0
	75	#define EXIT_FAILURE 1
	76	#endif
	77
6efd877d	78	int listing; /* true if a listing is wanted */
5d9f0ecf	79
6efd877d	80	char myname; / argv[0] */
67f3dd71 KR	81	#ifdef BFD_ASSEMBLER
	82	segT big_section, reg_section, pass1_section;
	83	segT diff_section, absent_section;
	84	segT text_section, data_section, bss_section;
	85	#endif
fecd2382	86	\f
6efd877d KR	87	int
	88	main (argc, argv)
	89	int argc;
	90	char **argv;
fecd2382	91	{
6efd877d KR	92	int work_argc; /* variable copy of argc */
	93	char *work_argv; / variable copy of argv */
	94	char arg; / an arg to program */
	95	char a; /* an arg flag (after -) */
6efd877d	96
d3038350 KR	97	#if 0 /* do we need any of this?? */
	98	{
	99	static const int sig[] = {SIGHUP, SIGINT, SIGPIPE, SIGTERM, 0};
	100
	101	for (a = 0; sig[a] != 0; a++)
	102	if (signal (sig[a], SIG_IGN) != SIG_IGN)
	103	signal (sig[a], got_sig);
	104	}
	105	#endif
6efd877d KR	106
	107	myname = argv[0];
	108	memset (flagseen, '\0', sizeof (flagseen)); /* aint seen nothing yet */
fecd2382 RP	109	#ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
fecd2382 RP	110	#define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
d3038350	111	#endif
6efd877d KR	112	out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME;
6efd877d KR	113
67f3dd71 KR	114	#ifdef BFD_ASSEMBLER
	115	bfd_init ();
	116	#endif
	117
d3038350 KR	118	symbol_begin ();
	119	subsegs_begin ();
	120	read_begin ();
	121	md_begin ();
	122	input_scrub_begin ();
	123	frag_init ();
6efd877d	124	/*
67f3dd71 KR	125	* Parse arguments, but we are only interested in flags.
	126	* When we find a flag, we process it then make it's argv[] NULL.
	127	* This helps any future argv[] scanners avoid what we processed.
	128	* Since it is easy to do here we interpret the special arg "-"
	129	* to mean "use stdin" and we set that argv[] pointing to "".
	130	* After we have munged argv[], the only things left are source file
	131	* name(s) and ""(s) denoting stdin. These file names are used
	132	* (perhaps more than once) later.
	133	*/
6efd877d KR	134	/* FIXME-SOMEDAY this should use getopt. */
	135	work_argc = argc - 1; /* don't count argv[0] */
	136	work_argv = argv + 1; /* skip argv[0] */
	137	for (; work_argc--; work_argv++)
	138	{
	139	arg = work_argv; / work_argv points to this argument */
	140
	141	if (arg != '-') / Filename. We need it later. */
	142	continue; /* Keep scanning args looking for flags. */
	143	if (arg[1] == '-' && arg[2] == 0)
	144	{
	145	/* "--" as an argument means read STDIN */
	146	/* on this scan, we don't want to think about filenames */
	147	work_argv = ""; / Code that means 'use stdin'. */
	148	continue;
	149	}
	150	/* This better be a switch. */
	151	arg++; /->letter. /
	152
	153	while ((a = *arg) != '\0')
	154	{ /* scan all the 1-char flags */
	155	arg++; /* arg->after letter. */
	156	a &= 0x7F; /* ascii only please */
6efd877d KR	157	flagseen[a] = 1;
	158	switch (a)
	159	{
6efd877d KR	160	case 'a':
	161	{
	162	int loop = 1;
	163
	164	while (loop)
	165	{
	166	switch (*arg)
	167	{
	168	case 'l':
	169	listing \|= LISTING_LISTING;
	170	arg++;
	171	break;
	172	case 's':
	173	listing \|= LISTING_SYMBOLS;
	174	arg++;
	175	break;
	176	case 'h':
	177	listing \|= LISTING_HLL;
	178	arg++;
	179	break;
	180
	181	case 'n':
	182	listing \|= LISTING_NOFORM;
	183	arg++;
	184	break;
	185	case 'd':
	186	listing \|= LISTING_NODEBUG;
	187	arg++;
	188	break;
	189	default:
	190	if (!listing)
	191	listing = LISTING_DEFAULT;
	192	loop = 0;
	193	break;
	194	}
	195	}
	196	}
	197
	198	break;
	199
	200
	201	case 'f':
	202	break; /* -f means fast - no need for "app" preprocessor. */
	203
	204	case 'D':
	205	/* DEBUG is implemented: it debugs different */
	206	/* things to other people's assemblers. */
	207	break;
	208
6efd877d KR	209	case 'I':
	210	{ /* Include file directory */
	211
	212	char *temp = NULL;
	213	if (*arg)
d3038350 KR	214	{
	215	temp = strdup (arg);
	216	if (!temp)
	217	as_fatal ("virtual memory exhuasted");
	218	}
6efd877d KR	219	else if (work_argc)
	220	{
	221	*work_argv = NULL;
	222	work_argc--;
	223	temp = *++work_argv;
	224	}
	225	else
	226	as_warn ("%s: I expected a filename after -I", myname);
	227	add_include_dir (temp);
	228	arg = ""; /* Finished with this arg. */
	229	break;
	230	}
	231
	232	#ifdef WARN_SIGNED_OVERFLOW_WORD
	233	/* Don't warn about signed overflow. */
	234	case 'J':
	235	break;
fecd2382	236	#endif
6efd877d	237
fecd2382	238	#ifndef WORKING_DOT_WORD
6efd877d KR	239	case 'K':
6efd877d KR	240	break;
fecd2382	241	#endif
6efd877d KR	242
	243	case 'L': /* -L means keep L* symbols */
	244	break;
	245
	246	case 'o':
	247	if (arg) / Rest of argument is object file-name. */
d3038350 KR	248	{
	249	out_file_name = strdup (arg);
	250	if (!out_file_name)
	251	as_fatal ("virtual memory exhausted");
	252	}
6efd877d KR	253	else if (work_argc)
	254	{ /* Want next arg for a file-name. */
	255	work_argv = NULL; / This is not a file-name. */
	256	work_argc--;
	257	out_file_name = *++work_argv;
	258	}
	259	else
d3038350 KR	260	as_warn ("%s: I expected a filename after -o. \"%s\" assumed.",
d3038350 KR	261	myname, out_file_name);
6efd877d KR	262	arg = ""; /* Finished with this arg. */
	263	break;
	264
	265	case 'R':
	266	/* -R means put data into text segment */
67f3dd71	267	flag_readonly_data_in_text = 1;
6efd877d KR	268	break;
	269
	270	case 'v':
fecd2382	271	#ifdef VMS
6efd877d KR	272	{
	273	extern char *compiler_version_string;
	274	compiler_version_string = arg;
	275	}
fecd2382	276	#else /* not VMS */
6efd877d	277	if (*arg && strcmp (arg, "ersion"))
d3038350 KR	278	{
	279	as_warn ("Unknown -v option ignored");
	280	arg += strlen (arg);
	281	break;
	282	}
	283
	284	fprintf (stderr, "GNU assembler version %s (%s)",
	285	GAS_VERSION, TARGET_ALIAS);
	286	#ifdef BFD_ASSEMBLER
	287	fprintf (stderr, ", using BFD version %s", BFD_VERSION);
fecd2382	288	#endif
d3038350 KR	289	fprintf (stderr, "\n");
d3038350 KR	290	#endif /* not VMS */
6efd877d KR	291	while (*arg)
	292	arg++; /* Skip the rest */
	293	break;
	294
	295	case 'W':
6efd877d	296	/* -W means don't warn about things */
67f3dd71 KR	297	flag_suppress_warnings = 1;
	298	break;
	299
	300	case 'w':
6efd877d KR	301	case 'X':
6efd877d KR	302	/* -X means treat warnings as errors */
67f3dd71	303	break;
6efd877d KR	304	case 'Z':
6efd877d KR	305	/* -Z means attempt to generate object file even after errors. */
67f3dd71	306	flag_always_generate_output = 1;
6efd877d KR	307	break;
	308
	309	default:
	310	--arg;
	311	if (md_parse_option (&arg, &work_argc, &work_argv) == 0)
	312	as_warn ("%s: I don't understand '%c' flag.", myname, a);
	313	if (arg && *arg)
	314	arg++;
	315	break;
	316	}
	317	}
	318	/*
67f3dd71 KR	319	* We have just processed a "-..." arg, which was not a
	320	* file-name. Smash it so the
	321	* things that look for filenames won't ever see it.
	322	*
	323	* Whatever work_argv points to, it has already been used
	324	* as part of a flag, so DON'T re-use it as a filename.
	325	*/
6efd877d KR	326	work_argv = NULL; / NULL means 'not a file-name' */
6efd877d KR	327	}
67f3dd71 KR	328
	329	#ifdef BFD_ASSEMBLER
	330	output_file_create (out_file_name);
	331	assert (stdoutput != 0);
fecd2382	332	#endif
67f3dd71	333
6efd877d KR	334	/* Here with flags set up in flagseen[]. */
6efd877d KR	335	perform_an_assembly_pass (argc, argv); /* Assemble it. */
fecd2382	336	#ifdef TC_I960
6efd877d	337	brtab_emit ();
fecd2382	338	#endif
6efd877d	339	if (seen_at_least_1_file ()
67f3dd71	340	&& !((had_warnings () && flag_always_generate_output)
6efd877d KR	341	\|\| had_errors () > 0))
	342	{
	343	write_object_file (); /* relax() addresses then emit object file */
	344	} /* we also check in write_object_file() just before emit. */
	345
	346	input_scrub_end ();
	347	md_end (); /* MACHINE.c */
	348
5d9f0ecf	349	#ifndef NO_LISTING
6efd877d	350	listing_print ("");
5d9f0ecf	351	#endif
6efd877d	352
d3038350 KR	353	if ((had_warnings () && flagseen['Z'])
	354	\|\| had_errors () > 0)
	355	return EXIT_FAILURE;
	356	return EXIT_SUCCESS;
	357	}
fecd2382	358	\f
6efd877d	359
fecd2382 RP	360	/* perform_an_assembly_pass()
	361	*
	362	* Here to attempt 1 pass over each input file.
	363	* We scan argv[*] looking for filenames or exactly "" which is
	364	* shorthand for stdin. Any argv that is NULL is not a file-name.
	365	* We set need_pass_2 TRUE if, after this, we still have unresolved
	366	* expressions of the form (unknown value)+-(unknown value).
	367	*
	368	* Note the un*x semantics: there is only 1 logical input file, but it
	369	* may be a catenation of many 'physical' input files.
	370	*/
6efd877d KR	371	static void
	372	perform_an_assembly_pass (argc, argv)
	373	int argc;
	374	char **argv;
fecd2382	375	{
6efd877d KR	376	int saw_a_file = 0;
6efd877d KR	377	unsigned int i;
67f3dd71 KR	378	#ifdef BFD_ASSEMBLER
	379	flagword applicable;
	380	#endif
	381
6efd877d KR	382	need_pass_2 = 0;
6efd877d KR	383
67f3dd71	384	#ifndef BFD_ASSEMBLER
5d9f0ecf	385	#ifdef MANY_SEGMENTS
6efd877d KR	386	for (i = SEG_E0; i < SEG_UNKNOWN; i++)
	387	{
	388	segment_info[i].fix_root = 0;
	389	}
	390	/* Create the three fixed ones */
	391	subseg_new (SEG_E0, 0);
	392	subseg_new (SEG_E1, 0);
	393	subseg_new (SEG_E2, 0);
	394	strcpy (segment_info[SEG_E0].scnhdr.s_name, ".text");
	395	strcpy (segment_info[SEG_E1].scnhdr.s_name, ".data");
	396	strcpy (segment_info[SEG_E2].scnhdr.s_name, ".bss");
	397
	398	subseg_new (SEG_E0, 0);
e6498b10	399	#else /* not MANY_SEGMENTS */
6efd877d KR	400	text_fix_root = NULL;
	401	data_fix_root = NULL;
	402	bss_fix_root = NULL;
	403
	404	subseg_new (SEG_TEXT, 0);
e6498b10	405	#endif /* not MANY_SEGMENTS */
67f3dd71 KR	406	#else /* BFD_ASSEMBLER */
	407	/* Create the standard sections, and those the assembler uses
	408	internally. */
	409	text_section = subseg_new (".text", 0);
	410	text_section->output_section = text_section;
	411	data_section = subseg_new (".data", 0);
	412	data_section->output_section = data_section;
	413	bss_section = subseg_new (".bss", 0);
	414	bss_section->output_section = bss_section;
	415	/* @@ FIXME -- we're setting the RELOC flag so that sections are assumed
	416	to have relocs, otherwise we don't find out in time. */
	417	applicable = bfd_applicable_section_flags (stdoutput);
	418	bfd_set_section_flags (stdoutput, text_section,
	419	applicable & (SEC_ALLOC \| SEC_LOAD \| SEC_RELOC
	420	\| SEC_CODE \| SEC_READONLY));
	421	/* @@ FIXME -- SEC_CODE seems to mean code only, rather than code possibly.*/
	422	bfd_set_section_flags (stdoutput, data_section,
	423	applicable & (SEC_ALLOC \| SEC_LOAD \| SEC_RELOC));
	424	bfd_set_section_flags (stdoutput, bss_section, applicable & SEC_ALLOC);
	425	subseg_new (BFD_ABS_SECTION_NAME, 0);
	426	subseg_new (BFD_UND_SECTION_NAME, 0);
	427	big_section = subseg_new ("GAS `big' section", 0);
	428	reg_section = subseg_new ("GAS `reg' section", 0);
	429	pass1_section = subseg_new ("GAS `pass1' section", 0);
	430	diff_section = subseg_new ("GAS `diff' section", 0);
	431	absent_section = subseg_new ("GAS `absent' section", 0);
	432
	433	subseg_new (".text", 0);
	434	#endif /* BFD_ASSEMBLER */
e6498b10	435
6efd877d KR	436	argv++; /* skip argv[0] */
	437	argc--; /* skip argv[0] */
	438	while (argc--)
	439	{
	440	if (*argv)
	441	{ /* Is it a file-name argument? */
	442	saw_a_file++;
	443	/* argv->"" if stdin desired, else->filename */
	444	read_a_source_file (*argv);
a39116f1	445	}
6efd877d KR	446	argv++; /* completed that argv */
	447	}
	448	if (!saw_a_file)
	449	read_a_source_file ("");
	450	} /* perform_an_assembly_pass() */
fecd2382	451	\f
fecd2382	452	static SIGTY
6efd877d KR	453	got_sig (sig)
6efd877d KR	454	int sig;
fecd2382	455	{
6efd877d KR	456	static here_before = 0;
	457
	458	as_bad ("Interrupted by signal %d", sig);
	459	if (here_before++)
d3038350	460	exit (EXIT_FAILURE);
6efd877d	461	return ((SIGTY) 0);
fecd2382 RP	462	}
fecd2382 RP	463
a39116f1	464	/* end of as.c */