X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gas%2Fas.c;h=4c5881abd88c8fd493b8448fa7859810f1d8c197;hb=66d1f7cc129495ea6c820bcd16242ec5ff39b172;hp=d617b3398d397313d020076595261e1891d96d96;hpb=58e8191cff66f5f2db40eaa984d822191f108781;p=deliverable%2Fbinutils-gdb.git diff --git a/gas/as.c b/gas/as.c index d617b3398d..4c5881abd8 100644 --- a/gas/as.c +++ b/gas/as.c @@ -1,7 +1,5 @@ /* as.c - GAS main program. - Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, - 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 - Free Software Foundation, Inc. + Copyright (C) 1987-2020 Free Software Foundation, Inc. This file is part of GAS, the GNU Assembler. @@ -24,15 +22,19 @@ 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 +/* Disable code to set FAKE_LABEL_NAME in obj-multi.h, to avoid circular + reference. */ +#define INITIALIZING_EMULS + #include "as.h" #include "subsegs.h" #include "output-file.h" @@ -41,6 +43,7 @@ #include "dwarf2dbg.h" #include "dw2gencfi.h" #include "bfdver.h" +#include "write.h" #ifdef HAVE_ITBL_CPU #include "itbl-ops.h" @@ -48,12 +51,6 @@ #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); @@ -98,8 +95,23 @@ int debug_memory = 0; /* Enable verbose mode. */ int verbose = 0; +/* Which version of DWARF CIE to produce. This default value of -1 + indicates that this value has not been set yet, a default value is + provided in dwarf2_init. A different value can also be supplied by the + command line flag --gdwarf-cie-version, or by a target in + MD_AFTER_PARSE_ARGS. */ +int flag_dwarf_cie_version = -1; + +/* The maximum level of DWARF DEBUG information we should manufacture. */ +unsigned int dwarf_level = 0; + +#if defined OBJ_ELF || defined OBJ_MAYBE_ELF +int flag_use_elf_stt_common = DEFAULT_GENERATE_ELF_STT_COMMON; +bfd_boolean flag_generate_build_notes = DEFAULT_GENERATE_BUILD_NOTES; +#endif + /* Keep the output file. */ -int keep_it = 0; +static int keep_it = 0; segT reg_section; segT expr_section; @@ -131,7 +143,6 @@ static int flag_macro_alternate; #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; @@ -142,7 +153,8 @@ static void select_emulation_mode (int argc, char **argv) { int i; - char *p, *em = 0; + char *p; + const char *em = NULL; for (i = 1; i < argc; i++) if (!strncmp ("--em", argv[i], 4)) @@ -203,10 +215,10 @@ common_emul_init (void) if (this_emulation->fake_label_name == 0) { if (this_emulation->leading_underscore) - this_emulation->fake_label_name = "L0\001"; + this_emulation->fake_label_name = FAKE_LABEL_NAME; else /* What other parameters should we test? */ - this_emulation->fake_label_name = ".L0\001"; + this_emulation->fake_label_name = "." FAKE_LABEL_NAME; } } #endif @@ -224,6 +236,11 @@ print_version_id (void) 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) { @@ -245,16 +262,32 @@ Options:\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 Map OLD to NEW in debug information\n")); + --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; - char *def_em; + const char *def_em; fprintf (stream, "\ --em=["); @@ -274,7 +307,31 @@ Options:\n\ --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] ")); + if (DEFAULT_GENERATE_ELF_STT_COMMON) + fprintf (stream, _("(default: yes)\n")); + else + fprintf (stream, _("(default: no)\n")); + fprintf (stream, _("\ + generate ELF common symbols with STT_COMMON type\n")); + fprintf (stream, _("\ + --sectname-subst enable section name substitution sequences\n")); + + fprintf (stream, _("\ + --generate-missing-build-notes=[no|yes] ")); +#if DEFAULT_GENERATE_BUILD_NOTES + fprintf (stream, _("(default: yes)\n")); +#else + fprintf (stream, _("(default: no)\n")); #endif + fprintf (stream, _("\ + generate GNU Build notes if none are present in the input\n")); +#endif /* OBJ_ELF */ + fprintf (stream, _("\ -f skip whitespace and comment preprocessing\n")); fprintf (stream, _("\ @@ -284,7 +341,9 @@ Options:\n\ fprintf (stream, _("\ --gstabs+ generate STABS debug info with GNU extensions\n")); fprintf (stream, _("\ - --gdwarf-2 generate DWARF2 debugging information\n")); + --gdwarf- generate DWARF debugging information. 2 <= <= 5\n")); + fprintf (stream, _("\ + --gdwarf-sections generate per-function section names for DWARF line information\n")); fprintf (stream, _("\ --hash-size= set the hash table size close to \n")); fprintf (stream, _("\ @@ -306,6 +365,8 @@ Options:\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")); @@ -352,7 +413,7 @@ Options:\n\ --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")); + @FILE read options from FILE\n")); md_show_usage (stream); @@ -426,26 +487,38 @@ parse_args (int * pargc, char *** pargv) OPTION_DEPFILE, OPTION_GSTABS, OPTION_GSTABS_PLUS, - OPTION_GDWARF2, + OPTION_GDWARF_2, + OPTION_GDWARF_3, + OPTION_GDWARF_4, + OPTION_GDWARF_5, + OPTION_GDWARF_SECTIONS, + OPTION_GDWARF_CIE_VERSION, OPTION_STRIP_LOCAL_ABSOLUTE, OPTION_TRADITIONAL_FORMAT, OPTION_WARN, OPTION_TARGET_HELP, OPTION_EXECSTACK, OPTION_NOEXECSTACK, + OPTION_SIZE_CHECK, + OPTION_ELF_STT_COMMON, + OPTION_ELF_BUILD_NOTES, + OPTION_SECTNAME_SUBST, OPTION_ALTERNATE, OPTION_AL, OPTION_HASH_TABLE_SIZE, OPTION_REDUCE_MEMORY_OVERHEADS, - OPTION_WARN_FATAL + 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 preceeding line so that it is simpler to + 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 @@ -455,6 +528,8 @@ parse_args (int * pargc, char *** pargv) ,{"a", optional_argument, NULL, 'a'} /* Handle -al=. */ ,{"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} @@ -462,12 +537,21 @@ parse_args (int * pargc, char *** pargv) #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} + ,{"generate-missing-build-notes", required_argument, NULL, OPTION_ELF_BUILD_NOTES} #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, + ,{"gdwarf-2", no_argument, NULL, OPTION_GDWARF_2} + ,{"gdwarf-3", no_argument, NULL, OPTION_GDWARF_3} + ,{"gdwarf-4", no_argument, NULL, OPTION_GDWARF_4} + ,{"gdwarf-5", no_argument, NULL, OPTION_GDWARF_5} + /* GCC uses --gdwarf-2 but GAS used to to use --gdwarf2, so we keep it here for backwards compatibility. */ - ,{"gdwarf2", no_argument, NULL, OPTION_GDWARF2} + ,{"gdwarf2", no_argument, NULL, OPTION_GDWARF_2} + ,{"gdwarf-sections", no_argument, NULL, OPTION_GDWARF_SECTIONS} + ,{"gdwarf-cie-version", required_argument, NULL, OPTION_GDWARF_CIE_VERSION} ,{"gen-debug", no_argument, NULL, 'g'} ,{"gstabs", no_argument, NULL, OPTION_GSTABS} ,{"gstabs+", no_argument, NULL, OPTION_GSTABS_PLUS} @@ -494,6 +578,7 @@ parse_args (int * pargc, char *** pargv) ,{"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} @@ -521,7 +606,7 @@ parse_args (int * pargc, char *** pargv) old_argv = *pargv; /* Initialize a new argv that contains no options. */ - new_argv = (char **) xmalloc (sizeof (char *) * (old_argc + 1)); + new_argv = XNEWVEC (char *, old_argc + 1); new_argv[0] = old_argv[0]; new_argc = 1; new_argv[new_argc] = NULL; @@ -573,7 +658,7 @@ parse_args (int * pargc, char *** pargv) case 1: /* File name. */ if (!strcmp (optarg, "-")) - optarg = ""; + optarg = (char *) ""; new_argv[new_argc++] = optarg; new_argv[new_argc] = NULL; break; @@ -589,6 +674,10 @@ parse_args (int * pargc, char *** pargv) 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; @@ -604,13 +693,19 @@ parse_args (int * pargc, char *** pargv) case OPTION_VERSION: /* This output is intended to follow the GNU standards document. */ printf (_("GNU assembler %s\n"), BFD_VERSION_STRING); - printf (_("Copyright 2010 Free Software Foundation, Inc.\n")); + printf (_("Copyright (C) 2020 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: @@ -634,6 +729,34 @@ This program has absolutely no warranty.\n")); #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; @@ -650,7 +773,7 @@ This program has absolutely no warranty.\n")); as_fatal (_("bad defsym; format is --defsym name=value")); *s++ = '\0'; i = bfd_scan_vma (s, (const char **) NULL, 0); - n = (struct defsym_list *) xmalloc (sizeof *n); + n = XNEW (struct defsym_list); n->next = defsyms; n->name = optarg; n->value = i; @@ -671,7 +794,7 @@ This program has absolutely no warranty.\n")); break; } - n = xmalloc (sizeof * n); + n = XNEW (struct itbl_file_list); n->next = itbl_files; n->name = optarg; itbl_files = n; @@ -703,7 +826,10 @@ This program has absolutely no warranty.\n")); if (md_debug_format_selector) debug_type = md_debug_format_selector (& use_gnu_debug_info_extensions); else if (IS_ELF) - debug_type = DEBUG_DWARF2; + { + debug_type = DEBUG_DWARF2; + dwarf_level = 2; + } else debug_type = DEBUG_STABS; break; @@ -715,8 +841,53 @@ This program has absolutely no warranty.\n")); debug_type = DEBUG_STABS; break; - case OPTION_GDWARF2: + case OPTION_GDWARF_2: debug_type = DEBUG_DWARF2; + dwarf_level = 2; + break; + + case OPTION_GDWARF_3: + debug_type = DEBUG_DWARF2; + dwarf_level = 3; + break; + + case OPTION_GDWARF_4: + debug_type = DEBUG_DWARF2; + dwarf_level = 4; + break; + + case OPTION_GDWARF_5: + debug_type = DEBUG_DWARF2; + dwarf_level = 5; + break; + + case OPTION_GDWARF_SECTIONS: + flag_dwarf_sections = TRUE; + break; + + case OPTION_GDWARF_CIE_VERSION: + flag_dwarf_cie_version = atoi (optarg); + /* The available CIE versions are 1 (DWARF 2), 3 (DWARF 3), and 4 + (DWARF 4 and 5). */ + if (flag_dwarf_cie_version < 1 + || flag_dwarf_cie_version == 2 + || flag_dwarf_cie_version > 4) + as_fatal (_("Invalid --gdwarf-cie-version `%s'"), optarg); + switch (flag_dwarf_cie_version) + { + case 1: + if (dwarf_level < 2) + dwarf_level = 2; + break; + case 3: + if (dwarf_level < 3) + dwarf_level = 3; + break; + default: + if (dwarf_level < 4) + dwarf_level = 4; + break; + } break; case 'J': @@ -787,7 +958,42 @@ This program has absolutely no warranty.\n")); flag_noexecstack = 1; flag_execstack = 0; break; -#endif + + 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; + + case OPTION_ELF_BUILD_NOTES: + if (strcasecmp (optarg, "no") == 0) + flag_generate_build_notes = FALSE; + else if (strcasecmp (optarg, "yes") == 0) + flag_generate_build_notes = TRUE; + else + as_fatal (_("Invalid --generate-missing-build-notes option: `%s'"), + optarg); + break; + +#endif /* OBJ_ELF */ + case 'Z': flag_always_generate_output = 1; break; @@ -926,17 +1132,10 @@ This program has absolutely no warranty.\n")); 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); @@ -962,24 +1161,22 @@ close_output_file (void) /* The interface between the macro code and gas expression handling. */ -static int -macro_expr (const char *emsg, int idx, sb *in, int *val) +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; + temp_ilp (in->ptr + idx); expression_and_evaluate (&ex); idx = input_line_pointer - in->ptr; - input_line_pointer = hold; + restore_ilp (); if (ex.X_op != O_constant) as_bad ("%s", emsg); - *val = (int) ex.X_add_number; + *val = ex.X_add_number; return idx; } @@ -997,10 +1194,13 @@ 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); @@ -1009,20 +1209,23 @@ perform_an_assembly_pass (int argc, char ** argv) /* @@ 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, + bfd_set_section_flags (text_section, applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_READONLY)); - bfd_set_section_flags (stdoutput, data_section, + bfd_set_section_flags (data_section, applicable & (SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_DATA)); - bfd_set_section_flags (stdoutput, bss_section, applicable & SEC_ALLOC); + bfd_set_section_flags (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. */ @@ -1054,41 +1257,17 @@ perform_an_assembly_pass (int argc, char ** argv) read_a_source_file (""); } -#ifdef OBJ_ELF -static void -create_obj_attrs_section (void) -{ - segT s; - char *p; - offsetT size; - const char *name; - - size = bfd_elf_obj_attr_size (stdoutput); - if (size) - { - name = get_elf_backend_data (stdoutput)->obj_attrs_section; - if (!name) - name = ".gnu.attributes"; - s = subseg_new (name, 0); - elf_section_type (s) - = get_elf_backend_data (stdoutput)->obj_attrs_section_type; - bfd_set_section_flags (stdoutput, s, SEC_READONLY | SEC_DATA); - frag_now_fix (); - p = frag_more (size); - bfd_elf_set_obj_attr_contents (stdoutput, (bfd_byte *)p, size); - } -} -#endif - int main (int argc, char ** argv) { char ** argv_orig = argv; + struct stat sob; int macro_strip_at; start_time = get_run_time (); + signal_init (); #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) setlocale (LC_MESSAGES, ""); @@ -1120,7 +1299,8 @@ main (int argc, char ** argv) out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME; hex_init (); - bfd_init (); + if (bfd_init () != BFD_INIT_MAGIC) + as_fatal (_("libbfd ABI mismatch")); bfd_set_error_program_name (myname); #ifdef USE_EMULATIONS @@ -1131,6 +1311,46 @@ main (int argc, char ** argv) /* Call parse_args before any of the init/begin functions so that switches like --hash-size can be honored. */ parse_args (&argc, &argv); + + if (argc > 1 && stat (out_file_name, &sob) == 0) + { + int i; + + for (i = 1; i < argc; ++i) + { + struct stat sib; + + /* Check that the input file and output file are different. */ + if (stat (argv[i], &sib) == 0 + && sib.st_ino == sob.st_ino + /* POSIX emulating systems may support stat() but if the + underlying file system does not support a file serial number + of some kind then they will return 0 for the inode. So + two files with an inode of 0 may not actually be the same. + On real POSIX systems no ordinary file will ever have an + inode of 0. */ + && sib.st_ino != 0 + /* Different files may have the same inode number if they + reside on different devices, so check the st_dev field as + well. */ + && sib.st_dev == sob.st_dev + /* PR 25572: Only check regular files. Devices, sockets and so + on might actually work as both input and output. Plus there + is a use case for using /dev/null as both input and output + when checking for command line option support in a script: + as --foo /dev/null -o /dev/null; if $? then ... */ + && S_ISREG (sib.st_mode)) + { + const char *saved_out_file_name = out_file_name; + + /* Don't let as_fatal remove the output file! */ + out_file_name = NULL; + as_fatal (_("The input '%s' and output '%s' files are the same"), + argv[i], saved_out_file_name); + } + } + } + symbol_begin (); frag_init (); subsegs_begin (); @@ -1156,6 +1376,8 @@ main (int argc, char ** argv) output_file_create (out_file_name); gas_assert (stdoutput != 0); + dot_symbol_init (); + #ifdef tc_init_after_args tc_init_after_args (); #endif @@ -1164,6 +1386,9 @@ main (int argc, char ** argv) 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. */ @@ -1196,11 +1421,6 @@ main (int argc, char ** argv) md_end (); #endif -#ifdef OBJ_ELF - if (IS_ELF) - create_obj_attrs_section (); -#endif - #if defined OBJ_ELF || defined OBJ_MAYBE_ELF if ((flag_execstack || flag_noexecstack) && OUTPUT_FLAVOR == bfd_target_elf_flavour) @@ -1208,9 +1428,9 @@ main (int argc, char ** argv) segT gnustack; gnustack = subseg_new (".note.GNU-stack", 0); - bfd_set_section_flags (stdoutput, gnustack, + bfd_set_section_flags (gnustack, SEC_READONLY | (flag_execstack ? SEC_CODE : 0)); - + } #endif @@ -1218,24 +1438,44 @@ main (int argc, char ** argv) assembly debugging or on behalf of the compiler, emit it now. */ dwarf2_finish (); - /* If we constructed dwarf2 .eh_frame info, either via .cfi + /* 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; + keep_it = 0; + if (seen_at_least_1_file ()) + { + int n_warns, n_errs; + char warn_msg[50]; + char err_msg[50]; - /* 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 (); + write_object_file (); - if (keep_it) - write_object_file (); + n_warns = had_warnings (); + n_errs = had_errors (); + + sprintf (warn_msg, + ngettext ("%d warning", "%d warnings", n_warns), n_warns); + sprintf (err_msg, + ngettext ("%d error", "%d errors", n_errs), 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); @@ -1243,19 +1483,13 @@ main (int argc, char ** argv) listing_print (listing_filename, argv_orig); #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; - 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) + if (had_errors () != 0) xexit (EXIT_FAILURE); /* Only generate dependency file if assembler was successful. */