c7a89bde9b
* stabs.c: Include libiberty.h (get_stab_string_offset): Use xstrdup rather than strdup. (s_stab_generic): Likewise. * as.c (parse_args): Likewise. * read.c (s_mri_sect): Likewise.
791 lines
19 KiB
C
791 lines
19 KiB
C
/* as.c - GAS main program.
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Copyright (C) 1987, 90, 91, 92, 93, 94, 95, 1996
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Free Software Foundation, Inc.
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This file is part of GAS, the GNU Assembler.
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GAS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GAS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GAS; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/*
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* Main program for AS; a 32-bit assembler of GNU.
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* Understands command arguments.
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* Has a few routines that don't fit in other modules because they
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* are shared.
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*
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*
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* bugs
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*
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* : initialisers
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* Since no-one else says they will support them in future: I
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* don't support them now.
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*
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*/
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#include "ansidecl.h"
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#include "libiberty.h"
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#define COMMON
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#include "as.h"
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#include "subsegs.h"
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#include "output-file.h"
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#include "sb.h"
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#include "macro.h"
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static void perform_an_assembly_pass PARAMS ((int argc, char **argv));
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static int macro_expr PARAMS ((const char *, int, sb *, int *));
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int listing; /* true if a listing is wanted */
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static char *listing_filename = NULL; /* Name of listing file. */
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/* Maximum level of macro nesting. */
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int max_macro_nest = 100;
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char *myname; /* argv[0] */
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#ifdef BFD_ASSEMBLER
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segT reg_section, expr_section;
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segT text_section, data_section, bss_section;
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#endif
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int chunksize = 5000;
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/* To monitor memory allocation more effectively, make this non-zero.
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Then the chunk sizes for gas and bfd will be reduced. */
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int debug_memory = 0;
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void
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print_version_id ()
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{
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static int printed;
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if (printed)
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return;
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printed = 1;
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fprintf (stderr, "GNU assembler version %s (%s)", GAS_VERSION, TARGET_ALIAS);
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#ifdef BFD_ASSEMBLER
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fprintf (stderr, ", using BFD version %s", BFD_VERSION);
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#endif
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fprintf (stderr, "\n");
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}
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void
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show_usage (stream)
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FILE *stream;
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{
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fprintf (stream, "Usage: %s [option...] [asmfile...]\n", myname);
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fprintf (stream, "\
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Options:\n\
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-a[sub-option...] turn on listings\n\
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Sub-options [default hls]:\n\
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d omit debugging directives\n\
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h include high-level source\n\
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l include assembly\n\
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n omit forms processing\n\
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s include symbols\n\
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=file set listing file name (must be last sub-option)\n");
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fprintf (stream, "\
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-D produce assembler debugging messages\n\
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--defsym SYM=VAL define symbol SYM to given value\n\
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-f skip whitespace and comment preprocessing\n\
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--help show this message and exit\n\
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-I DIR add DIR to search list for .include directives\n\
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-J don't warn about signed overflow\n\
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-K warn when differences altered for long displacements\n\
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-L keep local symbols (starting with `L')\n");
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fprintf (stream, "\
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-M,--mri assemble in MRI compatibility mode\n\
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-nocpp ignored\n\
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-o OBJFILE name the object-file output OBJFILE (default a.out)\n\
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-R fold data section into text section\n\
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--statistics print various measured statistics from execution\n\
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--version print assembler version number and exit\n\
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-W suppress warnings\n\
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-w ignored\n\
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-X ignored\n\
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-Z generate object file even after errors\n");
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md_show_usage (stream);
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}
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#ifdef USE_EMULATIONS
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#define EMULATION_ENVIRON "AS_EMULATION"
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extern struct emulation mipsbelf, mipslelf, mipself;
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extern struct emulation mipsbecoff, mipslecoff, mipsecoff;
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static const char *emulation_name;
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static struct emulation *const emulations[] = { EMULATIONS };
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static const int n_emulations = sizeof (emulations) / sizeof (emulations[0]);
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static void
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select_emulation_mode (argc, argv)
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int argc;
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char **argv;
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{
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int i;
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char *p, *em = 0;
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for (i = 1; i < argc; i++)
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if (!strncmp ("--em", argv[i], 4))
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break;
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if (i == argc)
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goto do_default;
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p = strchr (argv[i], '=');
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if (p)
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p++;
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else
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p = argv[i+1];
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if (!p || !*p)
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as_fatal ("missing emulation mode name");
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em = p;
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do_default:
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if (em == 0)
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em = getenv (EMULATION_ENVIRON);
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if (em == 0)
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em = DEFAULT_EMULATION;
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if (em)
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{
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for (i = 0; i < n_emulations; i++)
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if (!strcmp (emulations[i]->name, em))
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break;
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if (i == n_emulations)
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as_fatal ("unrecognized emulation name `%s'", em);
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this_emulation = emulations[i];
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}
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else
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this_emulation = emulations[0];
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this_emulation->init ();
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}
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const char *
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default_emul_bfd_name ()
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{
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abort ();
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}
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void
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common_emul_init ()
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{
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this_format = this_emulation->format;
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if (this_emulation->leading_underscore == 2)
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this_emulation->leading_underscore = this_format->dfl_leading_underscore;
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if (this_emulation->default_endian != 2)
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target_big_endian = this_emulation->default_endian;
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if (this_emulation->fake_label_name == 0)
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{
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if (this_emulation->leading_underscore)
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this_emulation->fake_label_name = "L0\001";
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else
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/* What other parameters should we test? */
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this_emulation->fake_label_name = ".L0\001";
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}
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}
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#endif
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/*
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* Since it is easy to do here we interpret the special arg "-"
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* to mean "use stdin" and we set that argv[] pointing to "".
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* After we have munged argv[], the only things left are source file
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* name(s) and ""(s) denoting stdin. These file names are used
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* (perhaps more than once) later.
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*
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* check for new machine-dep cmdline options in
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* md_parse_option definitions in config/tc-*.c
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*/
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void
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parse_args (pargc, pargv)
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int *pargc;
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char ***pargv;
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{
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int old_argc, new_argc;
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char **old_argv, **new_argv;
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/* Starting the short option string with '-' is for programs that
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expect options and other ARGV-elements in any order and that care about
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the ordering of the two. We describe each non-option ARGV-element
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as if it were the argument of an option with character code 1. */
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char *shortopts;
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extern CONST char *md_shortopts;
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static const char std_shortopts[] =
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{
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'-', 'J',
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#ifndef WORKING_DOT_WORD
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/* -K is not meaningful if .word is not being hacked. */
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'K',
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#endif
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'L', 'M', 'R', 'W', 'Z', 'f', 'a', ':', ':', 'D', 'I', ':', 'o', ':',
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#ifndef VMS
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/* -v takes an argument on VMS, so we don't make it a generic
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option. */
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'v',
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#endif
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'w', 'X',
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'\0'
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};
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struct option *longopts;
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extern struct option md_longopts[];
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extern size_t md_longopts_size;
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static const struct option std_longopts[] = {
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#define OPTION_HELP (OPTION_STD_BASE)
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{"help", no_argument, NULL, OPTION_HELP},
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{"mri", no_argument, NULL, 'M'},
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#define OPTION_NOCPP (OPTION_STD_BASE + 1)
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{"nocpp", no_argument, NULL, OPTION_NOCPP},
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#define OPTION_STATISTICS (OPTION_STD_BASE + 2)
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{"statistics", no_argument, NULL, OPTION_STATISTICS},
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#define OPTION_VERSION (OPTION_STD_BASE + 3)
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{"version", no_argument, NULL, OPTION_VERSION},
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#define OPTION_DUMPCONFIG (OPTION_STD_BASE + 4)
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{"dump-config", no_argument, NULL, OPTION_DUMPCONFIG},
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#define OPTION_VERBOSE (OPTION_STD_BASE + 5)
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{"verbose", no_argument, NULL, OPTION_VERBOSE},
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#define OPTION_EMULATION (OPTION_STD_BASE + 6)
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{"emulation", required_argument, NULL, OPTION_EMULATION},
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#define OPTION_DEFSYM (OPTION_STD_BASE + 7)
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{"defsym", required_argument, NULL, OPTION_DEFSYM}
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};
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/* Construct the option lists from the standard list and the
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target dependent list. */
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shortopts = concat (std_shortopts, md_shortopts, (char *) NULL);
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longopts = (struct option *) xmalloc (sizeof (std_longopts) + md_longopts_size);
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memcpy (longopts, std_longopts, sizeof (std_longopts));
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memcpy ((char *) longopts + sizeof (std_longopts),
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md_longopts, md_longopts_size);
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/* Make a local copy of the old argv. */
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old_argc = *pargc;
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old_argv = *pargv;
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/* Initialize a new argv that contains no options. */
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new_argv = (char **) xmalloc (sizeof (char *) * (old_argc + 1));
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new_argv[0] = old_argv[0];
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new_argc = 1;
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new_argv[new_argc] = NULL;
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while (1)
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{
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/* getopt_long_only is like getopt_long, but '-' as well as '--' can
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indicate a long option. */
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int longind;
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int optc = getopt_long_only (old_argc, old_argv, shortopts, longopts,
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&longind);
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if (optc == -1)
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break;
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switch (optc)
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{
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default:
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/* md_parse_option should return 1 if it recognizes optc,
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0 if not. */
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if (md_parse_option (optc, optarg) != 0)
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break;
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/* `-v' isn't included in the general short_opts list, so check for
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it explicity here before deciding we've gotten a bad argument. */
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if (optc == 'v')
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{
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#ifdef VMS
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/* Telling getopt to treat -v's value as optional can result
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in it picking up a following filename argument here. The
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VMS code in md_parse_option can return 0 in that case,
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but it has no way of pushing the filename argument back. */
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if (optarg && *optarg)
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new_argv[new_argc++] = optarg, new_argv[new_argc] = NULL;
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else
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#else
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case 'v':
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#endif
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case OPTION_VERBOSE:
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print_version_id ();
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break;
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}
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/*FALLTHRU*/
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case '?':
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exit (EXIT_FAILURE);
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case 1: /* File name. */
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if (!strcmp (optarg, "-"))
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optarg = "";
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new_argv[new_argc++] = optarg;
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new_argv[new_argc] = NULL;
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break;
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case OPTION_HELP:
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show_usage (stdout);
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exit (EXIT_SUCCESS);
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case OPTION_NOCPP:
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break;
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case OPTION_STATISTICS:
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flag_print_statistics = 1;
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break;
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case OPTION_VERSION:
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print_version_id ();
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exit (EXIT_SUCCESS);
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case OPTION_EMULATION:
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#ifdef USE_EMULATIONS
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if (strcmp (optarg, this_emulation->name))
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as_fatal ("multiple emulation names specified");
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#else
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as_fatal ("emulations not handled in this configuration");
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#endif
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break;
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case OPTION_DUMPCONFIG:
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fprintf (stderr, "alias = %s\n", TARGET_ALIAS);
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fprintf (stderr, "canonical = %s\n", TARGET_CANONICAL);
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fprintf (stderr, "cpu-type = %s\n", TARGET_CPU);
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#ifdef TARGET_OBJ_FORMAT
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fprintf (stderr, "format = %s\n", TARGET_OBJ_FORMAT);
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#endif
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#ifdef TARGET_FORMAT
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fprintf (stderr, "bfd-target = %s\n", TARGET_FORMAT);
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#endif
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exit (EXIT_SUCCESS);
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case OPTION_DEFSYM:
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{
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char *s;
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long i;
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symbolS *sym;
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for (s = optarg; *s != '\0' && *s != '='; s++)
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;
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if (*s == '\0')
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as_fatal ("bad defsym; format is --defsym name=value");
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*s++ = '\0';
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i = strtol (s, (char **) NULL, 0);
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sym = symbol_new (optarg, absolute_section, (valueT) i,
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&zero_address_frag);
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symbol_table_insert (sym);
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}
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break;
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case 'J':
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flag_signed_overflow_ok = 1;
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break;
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#ifndef WORKING_DOT_WORD
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case 'K':
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flag_warn_displacement = 1;
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break;
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#endif
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case 'L':
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flag_keep_locals = 1;
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break;
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case 'M':
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flag_mri = 1;
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#ifdef TC_M68K
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flag_m68k_mri = 1;
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#endif
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break;
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case 'R':
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flag_readonly_data_in_text = 1;
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break;
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case 'W':
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flag_no_warnings = 1;
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break;
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case 'Z':
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flag_always_generate_output = 1;
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break;
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case 'a':
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if (optarg)
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{
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while (*optarg)
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{
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switch (*optarg)
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{
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case 'd':
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listing |= LISTING_NODEBUG;
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break;
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case 'h':
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listing |= LISTING_HLL;
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break;
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case 'l':
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listing |= LISTING_LISTING;
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break;
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case 'n':
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listing |= LISTING_NOFORM;
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break;
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case 's':
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listing |= LISTING_SYMBOLS;
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break;
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case '=':
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listing_filename = xstrdup (optarg + 1);
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optarg += strlen (listing_filename);
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break;
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default:
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as_fatal ("invalid listing option `%c'", *optarg);
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break;
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}
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optarg++;
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}
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}
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if (!listing)
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listing = LISTING_DEFAULT;
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break;
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case 'D':
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/* DEBUG is implemented: it debugs different */
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/* things from other people's assemblers. */
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flag_debug = 1;
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break;
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case 'f':
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flag_no_comments = 1;
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break;
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case 'I':
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{ /* Include file directory */
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char *temp = xstrdup (optarg);
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add_include_dir (temp);
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break;
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}
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case 'o':
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out_file_name = xstrdup (optarg);
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break;
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case 'w':
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break;
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case 'X':
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/* -X means treat warnings as errors */
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break;
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}
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}
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free (shortopts);
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free (longopts);
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*pargc = new_argc;
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*pargv = new_argv;
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}
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static void dump_statistics ();
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static long start_time;
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int
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main (argc, argv)
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int argc;
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char **argv;
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{
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int macro_alternate;
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int macro_strip_at;
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int keep_it;
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start_time = get_run_time ();
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if (debug_memory)
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{
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#ifdef BFD_ASSEMBLER
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extern long _bfd_chunksize;
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_bfd_chunksize = 64;
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#endif
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chunksize = 64;
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}
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#ifdef HOST_SPECIAL_INIT
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HOST_SPECIAL_INIT (argc, argv);
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#endif
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myname = argv[0];
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xmalloc_set_program_name (myname);
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START_PROGRESS (myname, 0);
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#ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME
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#define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out"
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#endif
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out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME;
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hex_init ();
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#ifdef BFD_ASSEMBLER
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bfd_init ();
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#endif
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#ifdef USE_EMULATIONS
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select_emulation_mode (argc, argv);
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#endif
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PROGRESS (1);
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symbol_begin ();
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frag_init ();
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subsegs_begin ();
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parse_args (&argc, &argv);
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read_begin ();
|
||
input_scrub_begin ();
|
||
expr_begin ();
|
||
|
||
if (flag_print_statistics)
|
||
xatexit (dump_statistics);
|
||
|
||
macro_alternate = 0;
|
||
macro_strip_at = 0;
|
||
#ifdef TC_I960
|
||
macro_strip_at = flag_mri;
|
||
#endif
|
||
#ifdef TC_A29K
|
||
/* For compatibility with the AMD 29K family macro assembler
|
||
specification. */
|
||
macro_alternate = 1;
|
||
macro_strip_at = 1;
|
||
#endif
|
||
|
||
macro_init (macro_alternate, flag_mri, macro_strip_at, macro_expr);
|
||
|
||
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 md_end
|
||
md_end ();
|
||
#endif
|
||
|
||
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 (listing_filename);
|
||
#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 ();
|
||
|
||
END_PROGRESS (myname);
|
||
|
||
/* Use xexit 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)
|
||
xexit (EXIT_FAILURE);
|
||
xexit (EXIT_SUCCESS);
|
||
}
|
||
|
||
static void
|
||
dump_statistics ()
|
||
{
|
||
extern char **environ;
|
||
#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 - (char *) &environ));
|
||
#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
|
||
}
|
||
|
||
|
||
/* 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() */
|
||
|
||
/* The interface between the macro code and gas expression handling. */
|
||
|
||
static int
|
||
macro_expr (emsg, idx, in, val)
|
||
const char *emsg;
|
||
int idx;
|
||
sb *in;
|
||
int *val;
|
||
{
|
||
char *hold;
|
||
expressionS ex;
|
||
|
||
sb_terminate (in);
|
||
|
||
hold = input_line_pointer;
|
||
input_line_pointer = in->ptr + idx;
|
||
expression (&ex);
|
||
idx = input_line_pointer - in->ptr;
|
||
input_line_pointer = hold;
|
||
|
||
if (ex.X_op != O_constant)
|
||
as_bad ("%s", emsg);
|
||
|
||
*val = (int) ex.X_add_number;
|
||
|
||
return idx;
|
||
}
|
||
|
||
/* end of as.c */
|