/* as.c - GAS main program.
- Copyright (C) 1987, 1990, 1991, 1992, 1994 Free Software Foundation, Inc.
+ Copyright (C) 1987, 90, 91, 92, 93, 94, 95, 96, 1997
+ Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
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. */
+ along with GAS; see the file COPYING. If not, write to the Free
+ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+ 02111-1307, USA. */
/*
* Main program for AS; a 32-bit assembler of GNU.
*/
#include "ansidecl.h"
-#include "libiberty.h"
#define COMMON
#include "as.h"
#include "subsegs.h"
#include "output-file.h"
+#include "sb.h"
+#include "macro.h"
+
+#ifdef HAVE_SBRK
+#ifdef NEED_DECLARATION_SBRK
+extern PTR sbrk ();
+#endif
+#endif
static void perform_an_assembly_pass PARAMS ((int argc, char **argv));
+static int macro_expr PARAMS ((const char *, int, sb *, int *));
int listing; /* true if a listing is wanted */
+static char *listing_filename = NULL; /* Name of listing file. */
+
+/* Maximum level of macro nesting. */
+
+int max_macro_nest = 100;
+
char *myname; /* argv[0] */
#ifdef BFD_ASSEMBLER
segT reg_section, expr_section;
segT text_section, data_section, bss_section;
#endif
+int chunksize = 5000;
+
+/* 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;
+
+/* 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;
+};
+
+static struct defsym_list *defsyms;
+
+/* 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;
\f
void
print_version_id ()
h include high-level source\n\
l include assembly\n\
n omit forms processing\n\
- s include symbols\n");
+ s include symbols\n\
+ =file set listing file name (must be last sub-option)\n");
fprintf (stream, "\
-D produce assembler debugging messages\n\
+--defsym SYM=VAL define symbol SYM to given value\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\
-K warn when differences altered for long displacements\n\
-L keep local symbols (starting with `L')\n");
fprintf (stream, "\
+-M,--mri assemble in MRI compatibility mode\n\
-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\
+--statistics print various measured statistics from execution\n\
--version print assembler version number and exit\n\
-W suppress warnings\n\
+--itbl INSTTBL extend instruction set to include instructions\n\
+ matching the specifications defined in file INSTTBL\n\
-w ignored\n\
-X ignored\n\
-Z generate object file even after errors\n");
md_show_usage (stream);
+
}
#ifdef USE_EMULATIONS
extern struct emulation mipsbelf, mipslelf, mipself;
extern struct emulation mipsbecoff, mipslecoff, mipsecoff;
-static const char *emulation_name;
static struct emulation *const emulations[] = { EMULATIONS };
static const int n_emulations = sizeof (emulations) / sizeof (emulations[0]);
default_emul_bfd_name ()
{
abort ();
+ return NULL;
}
void
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";
+ 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', 'f', 'a', ':', ':', 'D', 'I', ':', 'o', ':',
+#ifndef VMS
+ /* -v takes an argument on VMS, so we don't make it a generic
+ option. */
+ 'v',
+#endif
+ 'w', 'X',
+ /* New option for extending instruction set (see also --itbl below) */
+ 't',
+ '\0'
+ };
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},
+ {"mri", no_argument, NULL, 'M'},
#define OPTION_NOCPP (OPTION_STD_BASE + 1)
{"nocpp", no_argument, NULL, OPTION_NOCPP},
#define OPTION_STATISTICS (OPTION_STD_BASE + 2)
{"verbose", no_argument, NULL, OPTION_VERBOSE},
#define OPTION_EMULATION (OPTION_STD_BASE + 6)
{"emulation", required_argument, NULL, OPTION_EMULATION},
+#define OPTION_DEFSYM (OPTION_STD_BASE + 7)
+ {"defsym", required_argument, NULL, OPTION_DEFSYM},
+#define OPTION_INSTTBL (OPTION_STD_BASE + 8)
+ /* 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, OPTION_INSTTBL}
};
/* Construct the option lists from the standard list and the
break;
case OPTION_VERSION:
- print_version_id ();
+ /* This output is intended to follow the GNU standards document. */
+ printf ("GNU assembler %s\n", GAS_VERSION);
+ printf ("Copyright 1996 Free Software Foundation, Inc.\n");
+ printf ("\
+This program is free software; you may redistribute it under the terms of\n\
+the GNU General Public License. This program has absolutely no warranty.\n");
+ printf ("This assembler was configured for a target of `%s'.\n",
+ TARGET_ALIAS);
exit (EXIT_SUCCESS);
case OPTION_EMULATION:
#endif
exit (EXIT_SUCCESS);
+ case OPTION_DEFSYM:
+ {
+ char *s;
+ long 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 = strtol (s, (char **) NULL, 0);
+ n = (struct defsym_list *) xmalloc (sizeof *n);
+ n->next = defsyms;
+ n->name = optarg;
+ n->value = i;
+ defsyms = n;
+ }
+ break;
+
+ case OPTION_INSTTBL:
+ case 't':
+ {
+ /* optarg is the name of the file containing the instruction
+ formats, opcodes, register names, etc. */
+ struct itbl_file_list *n;
+
+ n = (struct itbl_file_list *) xmalloc (sizeof *n);
+ 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)
+ {
+ fprintf (stderr, "Failed to read instruction table %s\n",
+ itbl_files->name);
+ exit (EXIT_SUCCESS);
+ }
+ }
+ break;
+
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 'M':
+ flag_mri = 1;
+#ifdef TC_M68K
+ flag_m68k_mri = 1;
+#endif
+ break;
+
case 'R':
flag_readonly_data_in_text = 1;
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;
case 'I':
{ /* Include file directory */
- char *temp = strdup (optarg);
- if (!temp)
- as_fatal ("virtual memory exhausted");
+ char *temp = xstrdup (optarg);
add_include_dir (temp);
break;
}
case 'o':
- out_file_name = strdup (optarg);
- if (!out_file_name)
- as_fatal ("virtual memory exhausted");
+ out_file_name = xstrdup (optarg);
break;
case 'w':
*pargv = new_argv;
}
+static void dump_statistics ();
+static long start_time;
+
int
main (argc, argv)
int argc;
char **argv;
{
+ int macro_alternate;
+ int macro_strip_at;
int keep_it;
- long start_time = get_run_time ();
+
+ start_time = get_run_time ();
+
+
+ if (debug_memory)
+ {
+#ifdef BFD_ASSEMBLER
+ extern long _bfd_chunksize;
+ _bfd_chunksize = 64;
+#endif
+ chunksize = 64;
+ }
#ifdef HOST_SPECIAL_INIT
HOST_SPECIAL_INIT (argc, argv);
hex_init ();
#ifdef BFD_ASSEMBLER
bfd_init ();
+ bfd_set_error_program_name (myname);
#endif
#ifdef USE_EMULATIONS
symbol_begin ();
frag_init ();
subsegs_begin ();
+ parse_args (&argc, &argv);
read_begin ();
input_scrub_begin ();
- PROGRESS (1);
- parse_args (&argc, &argv);
+ 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);
tc_init_after_args ();
#endif
+ itbl_init ();
+
+ /* 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);
+ symbol_table_insert (sym);
+ next = defsyms->next;
+ free (defsyms);
+ defsyms = next;
+ }
+
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);
+
+#ifdef md_end
+ md_end ();
#endif
-/* end-sanitize-rce */
if (seen_at_least_1_file ()
- && !((had_warnings () && flag_always_generate_output)
- || had_errors () > 0))
+ && (flag_always_generate_output || had_errors () == 0))
keep_it = 1;
else
keep_it = 0;
write_object_file ();
#ifndef NO_LISTING
- listing_print ("");
+ listing_print (listing_filename);
#endif
#ifndef OBJ_VMS /* does its own file handling */
output_file_close (out_file_name);
#endif
+ if (had_errors () > 0 && ! flag_always_generate_output)
+ keep_it = 0;
+
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;
+ /* Use xexit instead of return, because under VMS environments they
+ may not place the same interpretation on the value given. */
+ if (had_errors () > 0)
+ xexit (EXIT_FAILURE);
+ xexit (EXIT_SUCCESS);
+}
+
+static void
+dump_statistics ()
+{
+ extern char **environ;
#ifdef HAVE_SBRK
- char *lim = (char *) sbrk (0);
+ char *lim = (char *) sbrk (0);
#endif
- long run_time = get_run_time () - start_time;
+ 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: 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));
+ fprintf (stderr, "%s: data size %ld\n",
+ myname, (long) (lim - (char *) &environ));
#endif
- }
- /* 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);
+ 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
}
\f
and sections already created, in BFD_ASSEMBLER mode. */
md_begin ();
+#ifdef obj_begin
+ obj_begin ();
+#endif
+
argv++; /* skip argv[0] */
argc--; /* skip argv[0] */
while (argc--)
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 */
projects / binutils.git / blobdiff