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Diffstat (limited to 'contrib/binutils/gas/as.c')
| -rw-r--r-- | contrib/binutils/gas/as.c | 1165 |
1 files changed, 1165 insertions, 0 deletions
diff --git a/contrib/binutils/gas/as.c b/contrib/binutils/gas/as.c new file mode 100644 index 0000000..0911aa1 --- /dev/null +++ b/contrib/binutils/gas/as.c @@ -0,0 +1,1165 @@ +/* as.c - GAS main program. + Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, + 1999, 2000, 2001, 2002 + 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, 59 Temple Place - Suite 330, Boston, MA + 02111-1307, 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" + +#define COMMON + +#include "as.h" +#include "subsegs.h" +#include "output-file.h" +#include "sb.h" +#include "macro.h" +#include "dwarf2dbg.h" +#include "dw2gencfi.h" + +#ifdef BFD_ASSEMBLER +#include "bfdver.h" +#endif + +#ifdef HAVE_ITBL_CPU +#include "itbl-ops.h" +#else +#define itbl_parse(itbl_file) 1 +#define itbl_init() +#endif + +#ifdef HAVE_SBRK +#ifdef NEED_DECLARATION_SBRK +extern PTR sbrk (); +#endif +#endif + +#ifdef USING_CGEN +/* Perform any cgen specific initialisation for gas. */ +extern void gas_cgen_begin (void); +#endif + +/* Keep a record of the itbl files we read in. */ +struct itbl_file_list +{ + struct itbl_file_list *next; + char *name; +}; + +/* We build a list of defsyms as we read the options, and then define + them after we have initialized everything. */ +struct defsym_list +{ + struct defsym_list *next; + char *name; + valueT value; +}; + + +/* True if a listing is wanted. */ +int listing; + +/* Type of debugging to generate. */ +enum debug_info_type debug_type = DEBUG_UNSPECIFIED; +int use_gnu_debug_info_extensions = 0; + +/* Maximum level of macro nesting. */ +int max_macro_nest = 100; + +/* argv[0] */ +char * myname; + +/* The default obstack chunk size. If we set this to zero, the + obstack code will use whatever will fit in a 4096 byte block. */ +int chunksize = 0; + +/* To monitor memory allocation more effectively, make this non-zero. + Then the chunk sizes for gas and bfd will be reduced. */ +int debug_memory = 0; + +/* Enable verbose mode. */ +int verbose = 0; + +#ifdef BFD_ASSEMBLER +segT reg_section; +segT expr_section; +segT text_section; +segT data_section; +segT bss_section; +#endif + +/* Name of listing file. */ +static char *listing_filename = NULL; + +static struct defsym_list *defsyms; + +static struct itbl_file_list *itbl_files; + +static long start_time; + + +#ifdef USE_EMULATIONS +#define EMULATION_ENVIRON "AS_EMULATION" + +extern struct emulation mipsbelf, mipslelf, mipself; +extern struct emulation mipsbecoff, mipslecoff, mipsecoff; +extern struct emulation i386coff, i386elf, i386aout; +extern struct emulation crisaout, criself; + +static struct emulation *const emulations[] = { EMULATIONS }; +static const int n_emulations = sizeof (emulations) / sizeof (emulations[0]); + +static void +select_emulation_mode (int argc, char **argv) +{ + int i; + char *p, *em = 0; + + for (i = 1; i < argc; i++) + if (!strncmp ("--em", argv[i], 4)) + break; + + if (i == argc) + goto do_default; + + p = strchr (argv[i], '='); + if (p) + p++; + else + p = argv[i + 1]; + + if (!p || !*p) + as_fatal (_("missing emulation mode name")); + em = p; + + do_default: + if (em == 0) + em = getenv (EMULATION_ENVIRON); + if (em == 0) + em = DEFAULT_EMULATION; + + if (em) + { + for (i = 0; i < n_emulations; i++) + if (!strcmp (emulations[i]->name, em)) + break; + if (i == n_emulations) + as_fatal (_("unrecognized emulation name `%s'"), em); + this_emulation = emulations[i]; + } + else + this_emulation = emulations[0]; + + this_emulation->init (); +} + +const char * +default_emul_bfd_name (void) +{ + abort (); + return NULL; +} + +void +common_emul_init (void) +{ + this_format = this_emulation->format; + + if (this_emulation->leading_underscore == 2) + this_emulation->leading_underscore = this_format->dfl_leading_underscore; + + if (this_emulation->default_endian != 2) + target_big_endian = this_emulation->default_endian; + + if (this_emulation->fake_label_name == 0) + { + if (this_emulation->leading_underscore) + this_emulation->fake_label_name = "L0\001"; + else + /* What other parameters should we test? */ + this_emulation->fake_label_name = ".L0\001"; + } +} +#endif + +void +print_version_id (void) +{ + static int printed; + + if (printed) + return; + printed = 1; + +#ifdef BFD_ASSEMBLER + fprintf (stderr, _("GNU assembler version %s (%s) using BFD version %s"), + VERSION, TARGET_ALIAS, BFD_VERSION_STRING); +#else + fprintf (stderr, _("GNU assembler version %s (%s)"), VERSION, TARGET_ALIAS); +#endif + fprintf (stderr, "\n"); +} + +static void +show_usage (FILE * stream) +{ + fprintf (stream, _("Usage: %s [option...] [asmfile...]\n"), myname); + + fprintf (stream, _("\ +Options:\n\ + -a[sub-option...] turn on listings\n\ + Sub-options [default hls]:\n\ + c omit false conditionals\n\ + d omit debugging directives\n\ + h include high-level source\n\ + l include assembly\n\ + m include macro expansions\n\ + n omit forms processing\n\ + s include symbols\n\ + =FILE list to FILE (must be last sub-option)\n")); + + fprintf (stream, _("\ + -D produce assembler debugging messages\n")); + fprintf (stream, _("\ + --defsym SYM=VAL define symbol SYM to given value\n")); +#ifdef USE_EMULATIONS + { + int i; + char *def_em; + + fprintf (stream, "\ + --em=["); + for (i = 0; i < n_emulations - 1; i++) + fprintf (stream, "%s | ", emulations[i]->name); + fprintf (stream, "%s]\n", emulations[i]->name); + + def_em = getenv (EMULATION_ENVIRON); + if (!def_em) + def_em = DEFAULT_EMULATION; + fprintf (stream, _("\ + emulate output (default %s)\n"), def_em); + } +#endif +#if defined BFD_ASSEMBLER && (defined OBJ_ELF || defined OBJ_MAYBE_ELF) + fprintf (stream, _("\ + --execstack require executable stack for this object\n")); + fprintf (stream, _("\ + --noexecstack don't require executable stack for this object\n")); +#endif + fprintf (stream, _("\ + -f skip whitespace and comment preprocessing\n")); + fprintf (stream, _("\ + --gstabs generate stabs debugging information\n")); + fprintf (stream, _("\ + --gstabs+ generate stabs debug info with GNU extensions\n")); + fprintf (stream, _("\ + --gdwarf2 generate DWARF2 debugging information\n")); + fprintf (stream, _("\ + --help show this message and exit\n")); + fprintf (stream, _("\ + --target-help show target specific options\n")); + fprintf (stream, _("\ + -I DIR add DIR to search list for .include directives\n")); + fprintf (stream, _("\ + -J don't warn about signed overflow\n")); + fprintf (stream, _("\ + -K warn when differences altered for long displacements\n")); + fprintf (stream, _("\ + -L,--keep-locals keep local symbols (e.g. starting with `L')\n")); + fprintf (stream, _("\ + -M,--mri assemble in MRI compatibility mode\n")); + fprintf (stream, _("\ + --MD FILE write dependency information in FILE (default none)\n")); + fprintf (stream, _("\ + -nocpp ignored\n")); + fprintf (stream, _("\ + -o OBJFILE name the object-file output OBJFILE (default a.out)\n")); + fprintf (stream, _("\ + -R fold data section into text section\n")); + fprintf (stream, _("\ + --statistics print various measured statistics from execution\n")); + fprintf (stream, _("\ + --strip-local-absolute strip local absolute symbols\n")); + fprintf (stream, _("\ + --traditional-format Use same format as native assembler when possible\n")); + fprintf (stream, _("\ + --version print assembler version number and exit\n")); + fprintf (stream, _("\ + -W --no-warn suppress warnings\n")); + fprintf (stream, _("\ + --warn don't suppress warnings\n")); + fprintf (stream, _("\ + --fatal-warnings treat warnings as errors\n")); + fprintf (stream, _("\ + --itbl INSTTBL extend instruction set to include instructions\n\ + matching the specifications defined in file INSTTBL\n")); + fprintf (stream, _("\ + -w ignored\n")); + fprintf (stream, _("\ + -X ignored\n")); + fprintf (stream, _("\ + -Z generate object file even after errors\n")); + fprintf (stream, _("\ + --listing-lhs-width set the width in words of the output data column of\n\ + the listing\n")); + fprintf (stream, _("\ + --listing-lhs-width2 set the width in words of the continuation lines\n\ + of the output data column; ignored if smaller than\n\ + the width of the first line\n")); + fprintf (stream, _("\ + --listing-rhs-width set the max width in characters of the lines from\n\ + the source file\n")); + fprintf (stream, _("\ + --listing-cont-lines set the maximum number of continuation lines used\n\ + for the output data column of the listing\n")); + + md_show_usage (stream); + + fputc ('\n', stream); + fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO); +} + +/* Since it is easy to do here we interpret the special arg "-" + to mean "use stdin" and we set that argv[] pointing to "". + After we have munged argv[], the only things left are source file + name(s) and ""(s) denoting stdin. These file names are used + (perhaps more than once) later. + + check for new machine-dep cmdline options in + md_parse_option definitions in config/tc-*.c. */ + +static void +parse_args (int * pargc, char *** pargv) +{ + int old_argc; + int new_argc; + char ** old_argv; + char ** new_argv; + /* Starting the short option string with '-' is for programs that + expect options and other ARGV-elements in any order and that care about + the ordering of the two. We describe each non-option ARGV-element + as if it were the argument of an option with character code 1. */ + char *shortopts; + extern const char *md_shortopts; + static const char std_shortopts[] = + { + '-', 'J', +#ifndef WORKING_DOT_WORD + /* -K is not meaningful if .word is not being hacked. */ + 'K', +#endif + 'L', 'M', 'R', 'W', 'Z', 'a', ':', ':', 'D', 'f', '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; + /* Codes used for the long options with no short synonyms. */ + enum option_values + { + OPTION_HELP = OPTION_STD_BASE, + OPTION_NOCPP, + OPTION_STATISTICS, + OPTION_VERSION, + OPTION_DUMPCONFIG, + OPTION_VERBOSE, + OPTION_EMULATION, + OPTION_DEFSYM, + OPTION_INSTTBL, + OPTION_LISTING_LHS_WIDTH, + OPTION_LISTING_LHS_WIDTH2, + OPTION_LISTING_RHS_WIDTH, + OPTION_LISTING_CONT_LINES, + OPTION_DEPFILE, + OPTION_GSTABS, + OPTION_GSTABS_PLUS, + OPTION_STRIP_LOCAL_ABSOLUTE, + OPTION_TRADITIONAL_FORMAT, + OPTION_GDWARF2, + OPTION_WARN, + OPTION_TARGET_HELP, + OPTION_EXECSTACK, + OPTION_NOEXECSTACK, + OPTION_WARN_FATAL + }; + + static const struct option std_longopts[] = + { + {"help", no_argument, NULL, OPTION_HELP}, + /* getopt allows abbreviations, so we do this to stop it from + treating -k as an abbreviation for --keep-locals. Some + ports use -k to enable PIC assembly. */ + {"keep-locals", no_argument, NULL, 'L'}, + {"keep-locals", no_argument, NULL, 'L'}, + {"mri", no_argument, NULL, 'M'}, + {"nocpp", no_argument, NULL, OPTION_NOCPP}, + {"statistics", no_argument, NULL, OPTION_STATISTICS}, + {"version", no_argument, NULL, OPTION_VERSION}, + {"dump-config", no_argument, NULL, OPTION_DUMPCONFIG}, + {"verbose", no_argument, NULL, OPTION_VERBOSE}, + {"emulation", required_argument, NULL, OPTION_EMULATION}, + {"defsym", required_argument, NULL, OPTION_DEFSYM}, + /* 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}, + {"listing-lhs-width", required_argument, NULL, OPTION_LISTING_LHS_WIDTH}, + {"listing-lhs-width2", required_argument, NULL, OPTION_LISTING_LHS_WIDTH2}, + {"listing-rhs-width", required_argument, NULL, OPTION_LISTING_RHS_WIDTH}, + {"listing-cont-lines", required_argument, NULL, OPTION_LISTING_CONT_LINES}, + {"MD", required_argument, NULL, OPTION_DEPFILE}, + {"gstabs", no_argument, NULL, OPTION_GSTABS}, + {"gstabs+", no_argument, NULL, OPTION_GSTABS_PLUS}, + {"strip-local-absolute", no_argument, NULL, OPTION_STRIP_LOCAL_ABSOLUTE}, + {"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT}, + {"gdwarf2", no_argument, NULL, OPTION_GDWARF2}, + {"no-warn", no_argument, NULL, 'W'}, + {"warn", no_argument, NULL, OPTION_WARN}, + {"target-help", no_argument, NULL, OPTION_TARGET_HELP}, +#if defined BFD_ASSEMBLER && (defined OBJ_ELF || defined OBJ_MAYBE_ELF) + {"execstack", no_argument, NULL, OPTION_EXECSTACK}, + {"noexecstack", no_argument, NULL, OPTION_NOEXECSTACK}, +#endif + {"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL} + /* When you add options here, check that they do not collide with + OPTION_MD_BASE. See as.h. */ + }; + + /* Construct the option lists from the standard list and the target + dependent list. Include space for an extra NULL option and + always NULL terminate. */ + shortopts = concat (std_shortopts, md_shortopts, (char *) NULL); + longopts = xmalloc (sizeof (std_longopts) + md_longopts_size + sizeof (struct option)); + memcpy (longopts, std_longopts, sizeof (std_longopts)); + memcpy (((char *) longopts) + sizeof (std_longopts), md_longopts, md_longopts_size); + memset (((char *) longopts) + sizeof (std_longopts) + md_longopts_size, + 0, sizeof (struct option)); + + /* Make a local copy of the old argv. */ + old_argc = *pargc; + old_argv = *pargv; + + /* Initialize a new argv that contains no options. */ + new_argv = 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 explicitly here before deciding we've gotten a bad argument. */ + if (optc == 'v') + { +#ifdef VMS + /* Telling getopt to treat -v's value as optional can result + in it picking up a following filename argument here. The + VMS code in md_parse_option can return 0 in that case, + but it has no way of pushing the filename argument back. */ + if (optarg && *optarg) + new_argv[new_argc++] = optarg, new_argv[new_argc] = NULL; + else +#else + case 'v': +#endif + case OPTION_VERBOSE: + print_version_id (); + verbose = 1; + break; + } + /* Fall through. */ + + 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_TARGET_HELP: + md_show_usage (stdout); + exit (EXIT_SUCCESS); + + case OPTION_HELP: + show_usage (stdout); + exit (EXIT_SUCCESS); + + case OPTION_NOCPP: + break; + + case OPTION_STATISTICS: + flag_print_statistics = 1; + break; + + case OPTION_STRIP_LOCAL_ABSOLUTE: + flag_strip_local_absolute = 1; + break; + + case OPTION_TRADITIONAL_FORMAT: + flag_traditional_format = 1; + break; + + case OPTION_VERSION: + /* This output is intended to follow the GNU standards document. */ +#ifdef BFD_ASSEMBLER + printf (_("GNU assembler %s\n"), BFD_VERSION_STRING); +#else + printf (_("GNU assembler %s\n"), VERSION); +#endif + printf (_("Copyright 2002 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: +#ifdef USE_EMULATIONS + if (strcmp (optarg, this_emulation->name)) + as_fatal (_("multiple emulation names specified")); +#else + as_fatal (_("emulations not handled in this configuration")); +#endif + break; + + case OPTION_DUMPCONFIG: + fprintf (stderr, _("alias = %s\n"), TARGET_ALIAS); + fprintf (stderr, _("canonical = %s\n"), TARGET_CANONICAL); + fprintf (stderr, _("cpu-type = %s\n"), TARGET_CPU); +#ifdef TARGET_OBJ_FORMAT + fprintf (stderr, _("format = %s\n"), TARGET_OBJ_FORMAT); +#endif +#ifdef TARGET_FORMAT + fprintf (stderr, _("bfd-target = %s\n"), TARGET_FORMAT); +#endif + exit (EXIT_SUCCESS); + + case OPTION_DEFSYM: + { + char *s; + valueT i; + struct defsym_list *n; + + for (s = optarg; *s != '\0' && *s != '='; s++) + ; + if (*s == '\0') + as_fatal (_("bad defsym; format is --defsym name=value")); + *s++ = '\0'; +#ifdef BFD_ASSEMBLER + i = bfd_scan_vma (s, (const char **) NULL, 0); +#else + i = strtol (s, (char **) NULL, 0); +#endif + n = 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; + + if (optarg == NULL) + { + as_warn (_("no file name following -t option")); + break; + } + + n = 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) + as_fatal (_("failed to read instruction table %s\n"), + itbl_files->name); + } + break; + + case OPTION_DEPFILE: + start_dependencies (optarg); + break; + + case OPTION_GSTABS_PLUS: + use_gnu_debug_info_extensions = 1; + /* Fall through. */ + case OPTION_GSTABS: + debug_type = DEBUG_STABS; + break; + + case OPTION_GDWARF2: + debug_type = DEBUG_DWARF2; + break; + + case 'J': + flag_signed_overflow_ok = 1; + break; + +#ifndef WORKING_DOT_WORD + case 'K': + flag_warn_displacement = 1; + break; +#endif + case 'L': + flag_keep_locals = 1; + break; + + case OPTION_LISTING_LHS_WIDTH: + listing_lhs_width = atoi (optarg); + if (listing_lhs_width_second < listing_lhs_width) + listing_lhs_width_second = listing_lhs_width; + break; + case OPTION_LISTING_LHS_WIDTH2: + { + int tmp = atoi (optarg); + if (tmp > listing_lhs_width) + listing_lhs_width_second = tmp; + } + break; + case OPTION_LISTING_RHS_WIDTH: + listing_rhs_width = atoi (optarg); + break; + case OPTION_LISTING_CONT_LINES: + listing_lhs_cont_lines = atoi (optarg); + break; + + case 'M': + flag_mri = 1; +#ifdef TC_M68K + flag_m68k_mri = 1; +#endif + break; + + case 'R': + flag_readonly_data_in_text = 1; + break; + + case 'W': + flag_no_warnings = 1; + break; + + case OPTION_WARN: + flag_no_warnings = 0; + flag_fatal_warnings = 0; + break; + + case OPTION_WARN_FATAL: + flag_no_warnings = 0; + flag_fatal_warnings = 1; + break; + +#if defined BFD_ASSEMBLER && (defined OBJ_ELF || defined OBJ_MAYBE_ELF) + case OPTION_EXECSTACK: + flag_execstack = 1; + flag_noexecstack = 0; + break; + + case OPTION_NOEXECSTACK: + flag_noexecstack = 1; + flag_execstack = 0; + break; +#endif + case 'Z': + flag_always_generate_output = 1; + break; + + case 'a': + if (optarg) + { + if (md_parse_option (optc, optarg) != 0) + break; + + while (*optarg) + { + switch (*optarg) + { + case 'c': + listing |= LISTING_NOCOND; + break; + case 'd': + listing |= LISTING_NODEBUG; + break; + case 'h': + listing |= LISTING_HLL; + break; + case 'l': + listing |= LISTING_LISTING; + break; + case 'm': + listing |= LISTING_MACEXP; + break; + case 'n': + listing |= LISTING_NOFORM; + break; + case 's': + listing |= LISTING_SYMBOLS; + break; + case '=': + listing_filename = xstrdup (optarg + 1); + optarg += strlen (listing_filename); + break; + default: + as_fatal (_("invalid listing option `%c'"), *optarg); + break; + } + optarg++; + } + } + if (!listing) + listing = LISTING_DEFAULT; + break; + + case 'D': + /* DEBUG is implemented: it debugs different + things from other people's assemblers. */ + flag_debug = 1; + break; + + case 'f': + flag_no_comments = 1; + break; + + case 'I': + { /* Include file directory. */ + char *temp = xstrdup (optarg); + add_include_dir (temp); + break; + } + + case 'o': + out_file_name = xstrdup (optarg); + break; + + case 'w': + break; + + case 'X': + /* -X means treat warnings as errors. */ + break; + } + } + + free (shortopts); + free (longopts); + + *pargc = new_argc; + *pargv = new_argv; + +#ifdef md_after_parse_args + md_after_parse_args (); +#endif +} + +static void +dump_statistics (void) +{ +#ifdef HAVE_SBRK + char *lim = (char *) sbrk (0); +#endif + long run_time = get_run_time () - start_time; + + fprintf (stderr, _("%s: total time in assembly: %ld.%06ld\n"), + myname, run_time / 1000000, run_time % 1000000); +#ifdef HAVE_SBRK + fprintf (stderr, _("%s: data size %ld\n"), + myname, (long) (lim - (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 +} + +/* The interface between the macro code and gas expression handling. */ + +static int +macro_expr (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; +} + +/* Here to attempt 1 pass over each input file. + We scan argv[*] looking for filenames or exactly "" which is + shorthand for stdin. Any argv that is NULL is not a file-name. + We set need_pass_2 TRUE if, after this, we still have unresolved + expressions of the form (unknown value)+-(unknown value). + + Note the un*x semantics: there is only 1 logical input file, but it + may be a catenation of many 'physical' input files. */ + +static void +perform_an_assembly_pass (int argc, char ** argv) +{ + int saw_a_file = 0; +#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_SECTION_NAME, 0); + data_section = subseg_new (DATA_SECTION_NAME, 0); + bss_section = subseg_new (BSS_SECTION_NAME, 0); + /* @@ FIXME -- we're setting the RELOC flag so that sections are assumed + to have relocs, otherwise we don't find out in time. */ + applicable = bfd_applicable_section_flags (stdoutput); + bfd_set_section_flags (stdoutput, text_section, + applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC + | SEC_CODE | SEC_READONLY)); + bfd_set_section_flags (stdoutput, data_section, + applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC + | SEC_DATA)); + bfd_set_section_flags (stdoutput, bss_section, applicable & SEC_ALLOC); + seg_info (bss_section)->bss = 1; + 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 (); + +#ifdef USING_CGEN + gas_cgen_begin (); +#endif +#ifdef obj_begin + obj_begin (); +#endif + + /* Skip argv[0]. */ + argv++; + argc--; + + while (argc--) + { + if (*argv) + { /* Is it a file-name argument? */ + PROGRESS (1); + saw_a_file++; + /* argv->"" if stdin desired, else->filename. */ + read_a_source_file (*argv); + } + argv++; /* Completed that argv. */ + } + if (!saw_a_file) + read_a_source_file (""); +} + + +int +main (int argc, char ** argv) +{ + int macro_alternate; + int macro_strip_at; + int keep_it; + + start_time = get_run_time (); + +#if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) + setlocale (LC_MESSAGES, ""); +#endif +#if defined (HAVE_SETLOCALE) + setlocale (LC_CTYPE, ""); +#endif + bindtextdomain (PACKAGE, LOCALEDIR); + textdomain (PACKAGE); + + if (debug_memory) + chunksize = 64; + +#ifdef HOST_SPECIAL_INIT + HOST_SPECIAL_INIT (argc, argv); +#endif + + myname = argv[0]; + xmalloc_set_program_name (myname); + + START_PROGRESS (myname, 0); + +#ifndef OBJ_DEFAULT_OUTPUT_FILE_NAME +#define OBJ_DEFAULT_OUTPUT_FILE_NAME "a.out" +#endif + + out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME; + + hex_init (); +#ifdef BFD_ASSEMBLER + bfd_init (); + bfd_set_error_program_name (myname); +#endif + +#ifdef USE_EMULATIONS + select_emulation_mode (argc, argv); +#endif + + PROGRESS (1); + symbol_begin (); + frag_init (); + subsegs_begin (); + parse_args (&argc, &argv); + 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 + + 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); + + /* Assemble it. */ + perform_an_assembly_pass (argc, argv); + + cond_finish_check (-1); + +#ifdef md_end + md_end (); +#endif + +#if defined BFD_ASSEMBLER && (defined OBJ_ELF || defined OBJ_MAYBE_ELF) + if ((flag_execstack || flag_noexecstack) + && OUTPUT_FLAVOR == bfd_target_elf_flavour) + { + segT gnustack; + + gnustack = subseg_new (".note.GNU-stack", 0); + bfd_set_section_flags (stdoutput, gnustack, + SEC_READONLY | (flag_execstack ? SEC_CODE : 0)); + + } +#endif + + /* If we've been collecting dwarf2 .debug_line info, either for + assembly debugging or on behalf of the compiler, emit it now. */ + dwarf2_finish (); + + /* If we constructed dwarf2 .eh_frame info, either via .cfi + directives from the user or by the backend, emit it now. */ + cfi_finish (); + + if (seen_at_least_1_file () + && (flag_always_generate_output || had_errors () == 0)) + keep_it = 1; + else + keep_it = 0; + +#if defined (BFD_ASSEMBLER) || !defined (BFD) + /* This used to be done at the start of write_object_file in + write.c, but that caused problems when doing listings when + keep_it was zero. This could probably be moved above md_end, but + I didn't want to risk the change. */ + subsegs_finish (); +#endif + + 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 (flag_fatal_warnings && had_warnings () > 0 && had_errors () == 0) + as_bad (_("%d warnings, treating warnings as errors"), had_warnings ()); + + if (had_errors () > 0 && ! flag_always_generate_output) + keep_it = 0; + + 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_errors () > 0) + xexit (EXIT_FAILURE); + + /* Only generate dependency file if assembler was successful. */ + print_dependencies (); + + xexit (EXIT_SUCCESS); +} + |
