| /* as.c - GAS main program. |
| Copyright (C) 1987-2016 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 3, 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, 51 Franklin Street - Fifth Floor, Boston, MA |
| 02110-1301, 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. */ |
| |
| #define COMMON |
| |
| #include "as.h" |
| #include "subsegs.h" |
| #include "output-file.h" |
| #include "sb.h" |
| #include "macro.h" |
| #include "dwarf2dbg.h" |
| #include "dw2gencfi.h" |
| #include "bfdver.h" |
| |
| #ifdef HAVE_ITBL_CPU |
| #include "itbl-ops.h" |
| #else |
| #define itbl_init() |
| #endif |
| |
| #ifdef HAVE_SBRK |
| #ifdef NEED_DECLARATION_SBRK |
| extern void *sbrk (); |
| #endif |
| #endif |
| |
| #ifdef USING_CGEN |
| /* Perform any cgen specific initialisation for gas. */ |
| extern void gas_cgen_begin (void); |
| #endif |
| |
| /* 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; |
| |
| #ifndef MD_DEBUG_FORMAT_SELECTOR |
| #define MD_DEBUG_FORMAT_SELECTOR NULL |
| #endif |
| static enum debug_info_type (*md_debug_format_selector) (int *) = MD_DEBUG_FORMAT_SELECTOR; |
| |
| /* Maximum level of macro nesting. */ |
| int max_macro_nest = 100; |
| |
| /* argv[0] */ |
| static 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; |
| |
| #if defined OBJ_ELF || defined OBJ_MAYBE_ELF |
| int flag_use_elf_stt_common = DEFAULT_GENERATE_ELF_STT_COMMON; |
| #endif |
| |
| /* Keep the output file. */ |
| static int keep_it = 0; |
| |
| segT reg_section; |
| segT expr_section; |
| segT text_section; |
| segT data_section; |
| segT bss_section; |
| |
| /* Name of listing file. */ |
| static char *listing_filename = NULL; |
| |
| static struct defsym_list *defsyms; |
| |
| #ifdef HAVE_ITBL_CPU |
| /* 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; |
| #endif |
| |
| static long start_time; |
| #ifdef HAVE_SBRK |
| char *start_sbrk; |
| #endif |
| |
| static int flag_macro_alternate; |
| |
| |
| #ifdef USE_EMULATIONS |
| #define EMULATION_ENVIRON "AS_EMULATION" |
| |
| extern struct emulation mipsbelf, mipslelf, mipself; |
| 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; |
| const char *em = NULL; |
| |
| 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; |
| |
| fprintf (stderr, _("GNU assembler version %s (%s) using BFD version %s\n"), |
| VERSION, TARGET_ALIAS, BFD_VERSION_STRING); |
| } |
| |
| #ifdef DEFAULT_FLAG_COMPRESS_DEBUG |
| enum compressed_debug_section_type flag_compress_debug |
| = COMPRESS_DEBUG_GABI_ZLIB; |
| #endif |
| |
| 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\ |
| g include general info\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, _("\ |
| --alternate initially turn on alternate macro syntax\n")); |
| #ifdef DEFAULT_FLAG_COMPRESS_DEBUG |
| fprintf (stream, _("\ |
| --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\ |
| compress DWARF debug sections using zlib [default]\n")); |
| fprintf (stream, _("\ |
| --nocompress-debug-sections\n\ |
| don't compress DWARF debug sections\n")); |
| #else |
| fprintf (stream, _("\ |
| --compress-debug-sections[={none|zlib|zlib-gnu|zlib-gabi}]\n\ |
| compress DWARF debug sections using zlib\n")); |
| fprintf (stream, _("\ |
| --nocompress-debug-sections\n\ |
| don't compress DWARF debug sections [default]\n")); |
| #endif |
| fprintf (stream, _("\ |
| -D produce assembler debugging messages\n")); |
| fprintf (stream, _("\ |
| --debug-prefix-map OLD=NEW\n\ |
| map OLD to NEW in debug information\n")); |
| fprintf (stream, _("\ |
| --defsym SYM=VAL define symbol SYM to given value\n")); |
| #ifdef USE_EMULATIONS |
| { |
| int i; |
| const 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 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")); |
| fprintf (stream, _("\ |
| --size-check=[error|warning]\n\ |
| ELF .size directive check (default --size-check=error)\n")); |
| fprintf (stream, _("\ |
| --elf-stt-common=[no|yes]\n\ |
| generate ELF common symbols with STT_COMMON type\n")); |
| fprintf (stream, _("\ |
| --sectname-subst enable section name substitution sequences\n")); |
| #endif |
| fprintf (stream, _("\ |
| -f skip whitespace and comment preprocessing\n")); |
| fprintf (stream, _("\ |
| -g --gen-debug generate debugging information\n")); |
| fprintf (stream, _("\ |
| --gstabs generate STABS debugging information\n")); |
| fprintf (stream, _("\ |
| --gstabs+ generate STABS debug info with GNU extensions\n")); |
| fprintf (stream, _("\ |
| --gdwarf-2 generate DWARF2 debugging information\n")); |
| fprintf (stream, _("\ |
| --gdwarf-sections generate per-function section names for DWARF line information\n")); |
| fprintf (stream, _("\ |
| --hash-size=<value> set the hash table size close to <value>\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, _("\ |
| -no-pad-sections do not pad the end of sections to alignment boundaries\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, _("\ |
| --reduce-memory-overheads \n\ |
| prefer smaller memory use at the cost of longer\n\ |
| assembly times\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")); |
| #ifdef HAVE_ITBL_CPU |
| fprintf (stream, _("\ |
| --itbl INSTTBL extend instruction set to include instructions\n\ |
| matching the specifications defined in file INSTTBL\n")); |
| #endif |
| 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")); |
| fprintf (stream, _("\ |
| @FILE read options from FILE\n")); |
| |
| md_show_usage (stream); |
| |
| fputc ('\n', stream); |
| |
| if (REPORT_BUGS_TO[0] && stream == stdout) |
| 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', 'g', ':',':', 'I', ':', 'o', ':', |
| #ifndef VMS |
| /* -v takes an argument on VMS, so we don't make it a generic |
| option. */ |
| 'v', |
| #endif |
| 'w', 'X', |
| #ifdef HAVE_ITBL_CPU |
| /* New option for extending instruction set (see also --itbl below). */ |
| 't', ':', |
| #endif |
| '\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_DEBUG_PREFIX_MAP, |
| OPTION_DEFSYM, |
| OPTION_LISTING_LHS_WIDTH, |
| OPTION_LISTING_LHS_WIDTH2, |
| OPTION_LISTING_RHS_WIDTH, |
| OPTION_LISTING_CONT_LINES, |
| OPTION_DEPFILE, |
| OPTION_GSTABS, |
| OPTION_GSTABS_PLUS, |
| OPTION_GDWARF2, |
| OPTION_GDWARF_SECTIONS, |
| OPTION_STRIP_LOCAL_ABSOLUTE, |
| OPTION_TRADITIONAL_FORMAT, |
| OPTION_WARN, |
| OPTION_TARGET_HELP, |
| OPTION_EXECSTACK, |
| OPTION_NOEXECSTACK, |
| OPTION_SIZE_CHECK, |
| OPTION_ELF_STT_COMMON, |
| OPTION_SECTNAME_SUBST, |
| OPTION_ALTERNATE, |
| OPTION_AL, |
| OPTION_HASH_TABLE_SIZE, |
| OPTION_REDUCE_MEMORY_OVERHEADS, |
| OPTION_WARN_FATAL, |
| OPTION_COMPRESS_DEBUG, |
| OPTION_NOCOMPRESS_DEBUG, |
| OPTION_NO_PAD_SECTIONS /* = STD_BASE + 40 */ |
| /* When you add options here, check that they do |
| not collide with OPTION_MD_BASE. See as.h. */ |
| }; |
| |
| static const struct option std_longopts[] = |
| { |
| /* Note: commas are placed at the start of the line rather than |
| the end of the preceding line so that it is simpler to |
| selectively add and remove lines from this list. */ |
| {"alternate", no_argument, NULL, OPTION_ALTERNATE} |
| /* The entry for "a" is here to prevent getopt_long_only() from |
| considering that -a is an abbreviation for --alternate. This is |
| necessary because -a=<FILE> is a valid switch but getopt would |
| normally reject it since --alternate does not take an argument. */ |
| ,{"a", optional_argument, NULL, 'a'} |
| /* Handle -al=<FILE>. */ |
| ,{"al", optional_argument, NULL, OPTION_AL} |
| ,{"compress-debug-sections", optional_argument, NULL, OPTION_COMPRESS_DEBUG} |
| ,{"nocompress-debug-sections", no_argument, NULL, OPTION_NOCOMPRESS_DEBUG} |
| ,{"debug-prefix-map", required_argument, NULL, OPTION_DEBUG_PREFIX_MAP} |
| ,{"defsym", required_argument, NULL, OPTION_DEFSYM} |
| ,{"dump-config", no_argument, NULL, OPTION_DUMPCONFIG} |
| ,{"emulation", required_argument, NULL, OPTION_EMULATION} |
| #if defined OBJ_ELF || defined OBJ_MAYBE_ELF |
| ,{"execstack", no_argument, NULL, OPTION_EXECSTACK} |
| ,{"noexecstack", no_argument, NULL, OPTION_NOEXECSTACK} |
| ,{"size-check", required_argument, NULL, OPTION_SIZE_CHECK} |
| ,{"elf-stt-common", required_argument, NULL, OPTION_ELF_STT_COMMON} |
| ,{"sectname-subst", no_argument, NULL, OPTION_SECTNAME_SUBST} |
| #endif |
| ,{"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL} |
| ,{"gdwarf-2", no_argument, NULL, OPTION_GDWARF2} |
| /* GCC uses --gdwarf-2 but GAS uses to use --gdwarf2, |
| so we keep it here for backwards compatibility. */ |
| ,{"gdwarf2", no_argument, NULL, OPTION_GDWARF2} |
| ,{"gdwarf-sections", no_argument, NULL, OPTION_GDWARF_SECTIONS} |
| ,{"gen-debug", no_argument, NULL, 'g'} |
| ,{"gstabs", no_argument, NULL, OPTION_GSTABS} |
| ,{"gstabs+", no_argument, NULL, OPTION_GSTABS_PLUS} |
| ,{"hash-size", required_argument, NULL, OPTION_HASH_TABLE_SIZE} |
| ,{"help", no_argument, NULL, OPTION_HELP} |
| #ifdef HAVE_ITBL_CPU |
| /* 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, 't'} |
| #endif |
| /* 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'} |
| ,{"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} |
| ,{"mri", no_argument, NULL, 'M'} |
| ,{"nocpp", no_argument, NULL, OPTION_NOCPP} |
| ,{"no-pad-sections", no_argument, NULL, OPTION_NO_PAD_SECTIONS} |
| ,{"no-warn", no_argument, NULL, 'W'} |
| ,{"reduce-memory-overheads", no_argument, NULL, OPTION_REDUCE_MEMORY_OVERHEADS} |
| ,{"statistics", no_argument, NULL, OPTION_STATISTICS} |
| ,{"strip-local-absolute", no_argument, NULL, OPTION_STRIP_LOCAL_ABSOLUTE} |
| ,{"version", no_argument, NULL, OPTION_VERSION} |
| ,{"verbose", no_argument, NULL, OPTION_VERBOSE} |
| ,{"target-help", no_argument, NULL, OPTION_TARGET_HELP} |
| ,{"traditional-format", no_argument, NULL, OPTION_TRADITIONAL_FORMAT} |
| ,{"warn", no_argument, NULL, OPTION_WARN} |
| }; |
| |
| /* 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 = (struct option *) 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 = XNEWVEC (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; |
| } |
| else |
| as_bad (_("unrecognized option -%c%s"), optc, optarg ? optarg : ""); |
| /* Fall through. */ |
| |
| case '?': |
| exit (EXIT_FAILURE); |
| |
| case 1: /* File name. */ |
| if (!strcmp (optarg, "-")) |
| optarg = (char *) ""; |
| 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_NO_PAD_SECTIONS: |
| do_not_pad_sections_to_alignment = 1; |
| 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. */ |
| printf (_("GNU assembler %s\n"), BFD_VERSION_STRING); |
| printf (_("Copyright (C) 2016 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 version 3 or later.\n\ |
| This program has absolutely no warranty.\n")); |
| #ifdef TARGET_WITH_CPU |
| printf (_("This assembler was configured for a target of `%s' " |
| "and default,\ncpu type `%s'.\n"), |
| TARGET_ALIAS, TARGET_WITH_CPU); |
| #else |
| printf (_("This assembler was configured for a target of `%s'.\n"), |
| TARGET_ALIAS); |
| #endif |
| 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_COMPRESS_DEBUG: |
| if (optarg) |
| { |
| #if defined OBJ_ELF || defined OBJ_MAYBE_ELF |
| if (strcasecmp (optarg, "none") == 0) |
| flag_compress_debug = COMPRESS_DEBUG_NONE; |
| else if (strcasecmp (optarg, "zlib") == 0) |
| flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB; |
| else if (strcasecmp (optarg, "zlib-gnu") == 0) |
| flag_compress_debug = COMPRESS_DEBUG_GNU_ZLIB; |
| else if (strcasecmp (optarg, "zlib-gabi") == 0) |
| flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB; |
| else |
| as_fatal (_("Invalid --compress-debug-sections option: `%s'"), |
| optarg); |
| #else |
| as_fatal (_("--compress-debug-sections=%s is unsupported"), |
| optarg); |
| #endif |
| } |
| else |
| flag_compress_debug = COMPRESS_DEBUG_GABI_ZLIB; |
| break; |
| |
| case OPTION_NOCOMPRESS_DEBUG: |
| flag_compress_debug = COMPRESS_DEBUG_NONE; |
| break; |
| |
| case OPTION_DEBUG_PREFIX_MAP: |
| add_debug_prefix_map (optarg); |
| break; |
| |
| 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'; |
| i = bfd_scan_vma (s, (const char **) NULL, 0); |
| n = XNEW (struct defsym_list); |
| n->next = defsyms; |
| n->name = optarg; |
| n->value = i; |
| defsyms = n; |
| } |
| break; |
| |
| #ifdef HAVE_ITBL_CPU |
| 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 = XNEW (struct itbl_file_list); |
| 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; |
| #endif |
| |
| case OPTION_DEPFILE: |
| start_dependencies (optarg); |
| break; |
| |
| case 'g': |
| /* Some backends, eg Alpha and Mips, use the -g switch for their |
| own purposes. So we check here for an explicit -g and allow |
| the backend to decide if it wants to process it. */ |
| if ( old_argv[optind - 1][1] == 'g' |
| && md_parse_option (optc, optarg)) |
| continue; |
| |
| if (md_debug_format_selector) |
| debug_type = md_debug_format_selector (& use_gnu_debug_info_extensions); |
| else if (IS_ELF) |
| debug_type = DEBUG_DWARF2; |
| else |
| debug_type = DEBUG_STABS; |
| 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 OPTION_GDWARF_SECTIONS: |
| flag_dwarf_sections = TRUE; |
| 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 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; |
| |
| case OPTION_SIZE_CHECK: |
| if (strcasecmp (optarg, "error") == 0) |
| flag_allow_nonconst_size = FALSE; |
| else if (strcasecmp (optarg, "warning") == 0) |
| flag_allow_nonconst_size = TRUE; |
| else |
| as_fatal (_("Invalid --size-check= option: `%s'"), optarg); |
| break; |
| |
| case OPTION_ELF_STT_COMMON: |
| if (strcasecmp (optarg, "no") == 0) |
| flag_use_elf_stt_common = 0; |
| else if (strcasecmp (optarg, "yes") == 0) |
| flag_use_elf_stt_common = 1; |
| else |
| as_fatal (_("Invalid --elf-stt-common= option: `%s'"), |
| optarg); |
| break; |
| |
| case OPTION_SECTNAME_SUBST: |
| flag_sectname_subst = 1; |
| break; |
| #endif |
| case 'Z': |
| flag_always_generate_output = 1; |
| break; |
| |
| case OPTION_AL: |
| listing |= LISTING_LISTING; |
| if (optarg) |
| listing_filename = xstrdup (optarg); |
| break; |
| |
| case OPTION_ALTERNATE: |
| optarg = old_argv [optind - 1]; |
| while (* optarg == '-') |
| optarg ++; |
| |
| if (strcmp (optarg, "alternate") == 0) |
| { |
| flag_macro_alternate = 1; |
| break; |
| } |
| optarg ++; |
| /* Fall through. */ |
| |
| case 'a': |
| if (optarg) |
| { |
| if (optarg != old_argv[optind] && optarg[-1] == '=') |
| --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 'g': |
| listing |= LISTING_GENERAL; |
| 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; |
| |
| case OPTION_REDUCE_MEMORY_OVERHEADS: |
| /* The only change we make at the moment is to reduce |
| the size of the hash tables that we use. */ |
| set_gas_hash_table_size (4051); |
| break; |
| |
| case OPTION_HASH_TABLE_SIZE: |
| { |
| unsigned long new_size; |
| |
| new_size = strtoul (optarg, NULL, 0); |
| if (new_size) |
| set_gas_hash_table_size (new_size); |
| else |
| as_fatal (_("--hash-size needs a numeric argument")); |
| 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 - start_sbrk)); |
| #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 |
| } |
| |
| static void |
| close_output_file (void) |
| { |
| output_file_close (out_file_name); |
| if (!keep_it) |
| unlink_if_ordinary (out_file_name); |
| } |
| |
| /* The interface between the macro code and gas expression handling. */ |
| |
| static size_t |
| macro_expr (const char *emsg, size_t idx, sb *in, offsetT *val) |
| { |
| char *hold; |
| expressionS ex; |
| |
| sb_terminate (in); |
| |
| hold = input_line_pointer; |
| input_line_pointer = in->ptr + idx; |
| expression_and_evaluate (&ex); |
| idx = input_line_pointer - in->ptr; |
| input_line_pointer = hold; |
| |
| if (ex.X_op != O_constant) |
| as_bad ("%s", emsg); |
| |
| *val = 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; |
| #ifndef OBJ_MACH_O |
| flagword applicable; |
| #endif |
| |
| need_pass_2 = 0; |
| |
| #ifndef OBJ_MACH_O |
| /* 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; |
| #endif |
| 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); |
| |
| #ifndef OBJ_MACH_O |
| subseg_set (text_section, 0); |
| #endif |
| |
| /* This may add symbol table entries, which requires having an open BFD, |
| and sections already created. */ |
| 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) |
| { |
| char ** argv_orig = argv; |
| |
| int macro_strip_at; |
| |
| start_time = get_run_time (); |
| #ifdef HAVE_SBRK |
| start_sbrk = (char *) sbrk (0); |
| #endif |
| |
| #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); |
| |
| expandargv (&argc, &argv); |
| |
| 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 (); |
| bfd_init (); |
| bfd_set_error_program_name (myname); |
| |
| #ifdef USE_EMULATIONS |
| select_emulation_mode (argc, argv); |
| #endif |
| |
| PROGRESS (1); |
| /* Call parse_args before any of the init/begin functions |
| so that switches like --hash-size can be honored. */ |
| parse_args (&argc, &argv); |
| symbol_begin (); |
| frag_init (); |
| subsegs_begin (); |
| read_begin (); |
| input_scrub_begin (); |
| expr_begin (); |
| |
| /* It has to be called after dump_statistics (). */ |
| xatexit (close_output_file); |
| |
| if (flag_print_statistics) |
| xatexit (dump_statistics); |
| |
| macro_strip_at = 0; |
| #ifdef TC_I960 |
| macro_strip_at = flag_mri; |
| #endif |
| |
| macro_init (flag_macro_alternate, flag_mri, macro_strip_at, macro_expr); |
| |
| PROGRESS (1); |
| |
| output_file_create (out_file_name); |
| gas_assert (stdoutput != 0); |
| |
| dot_symbol_init (); |
| |
| #ifdef tc_init_after_args |
| tc_init_after_args (); |
| #endif |
| |
| itbl_init (); |
| |
| dwarf2_init (); |
| |
| local_symbol_make (".gasversion.", absolute_section, |
| BFD_VERSION / 10000UL, &predefined_address_frag); |
| |
| /* 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); |
| /* Make symbols defined on the command line volatile, so that they |
| can be redefined inside a source file. This makes this assembler's |
| behaviour compatible with earlier versions, but it may not be |
| completely intuitive. */ |
| S_SET_VOLATILE (sym); |
| 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 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 (); |
| |
| keep_it = 0; |
| if (seen_at_least_1_file ()) |
| { |
| int n_warns, n_errs; |
| char warn_msg[50]; |
| char err_msg[50]; |
| |
| write_object_file (); |
| |
| n_warns = had_warnings (); |
| n_errs = had_errors (); |
| |
| if (n_warns == 1) |
| sprintf (warn_msg, _("%d warning"), n_warns); |
| else |
| sprintf (warn_msg, _("%d warnings"), n_warns); |
| if (n_errs == 1) |
| sprintf (err_msg, _("%d error"), n_errs); |
| else |
| sprintf (err_msg, _("%d errors"), n_errs); |
| |
| if (flag_fatal_warnings && n_warns != 0) |
| { |
| if (n_errs == 0) |
| as_bad (_("%s, treating warnings as errors"), warn_msg); |
| n_errs += n_warns; |
| } |
| |
| if (n_errs == 0) |
| keep_it = 1; |
| else if (flag_always_generate_output) |
| { |
| /* The -Z flag indicates that an object file should be generated, |
| regardless of warnings and errors. */ |
| keep_it = 1; |
| fprintf (stderr, _("%s, %s, generating bad object file\n"), |
| err_msg, warn_msg); |
| } |
| } |
| |
| fflush (stderr); |
| |
| #ifndef NO_LISTING |
| listing_print (listing_filename, argv_orig); |
| #endif |
| |
| 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); |
| } |