/* as.c - GAS main program.
- Copyright (C) 1987-2018 Free Software Foundation, Inc.
+ Copyright (C) 1987-2021 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
/* 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.
+ This defaults to 3 unless overridden by a command line option. */
+unsigned int dwarf_level = 3;
+
#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. */
--size-check=[error|warning]\n\
ELF .size directive check (default --size-check=error)\n"));
fprintf (stream, _("\
- --elf-stt-common=[no|yes]\n\
+ --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, _("\
fprintf (stream, _("\
--gstabs+ generate STABS debug info with GNU extensions\n"));
fprintf (stream, _("\
- --gdwarf-2 generate DWARF2 debugging information\n"));
+ --gdwarf-<N> generate DWARF<N> debugging information. 2 <= <N> <= 5\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, _("\
-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"));
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_NOEXECSTACK,
OPTION_SIZE_CHECK,
OPTION_ELF_STT_COMMON,
+ OPTION_ELF_BUILD_NOTES,
OPTION_SECTNAME_SUBST,
OPTION_ALTERNATE,
OPTION_AL,
,{"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}
case OPTION_VERSION:
/* This output is intended to follow the GNU standards document. */
printf (_("GNU assembler %s\n"), BFD_VERSION_STRING);
- printf (_("Copyright (C) 2018 Free Software Foundation, Inc.\n"));
+ printf (_("Copyright (C) 2021 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\
&& md_parse_option (optc, optarg))
continue;
+ /* We end up here for any -gsomething-not-already-a-long-option.
+ give some useful feedback on not (yet) supported -gdwarfxxx
+ versions/sections/options. */
+ if (strncmp (old_argv[optind - 1], "-gdwarf",
+ strlen ("-gdwarf")) == 0)
+ as_fatal (_("unknown DWARF option %s\n"), old_argv[optind - 1]);
+
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;
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':
flag_signed_overflow_ok = 1;
break;
case OPTION_SECTNAME_SUBST:
flag_sectname_subst = 1;
break;
-#endif
+
+ 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;
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;
- }
+ break;
}
}
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);
/* @@ 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);
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
{
struct stat sib;
- if (stat (argv[i], &sib) == 0)
+ /* 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))
{
- if (sib.st_ino == sob.st_ino)
- {
- /* Don't let as_fatal remove the output file! */
- out_file_name = NULL;
- as_fatal (_("The input and output files must be distinct"));
- }
+ 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);
}
}
}
dwarf2_init ();
local_symbol_make (".gasversion.", absolute_section,
- BFD_VERSION / 10000UL, &predefined_address_frag);
+ &predefined_address_frag, BFD_VERSION / 10000UL);
/* Now that we have fully initialized, and have created the output
file, define any symbols requested by --defsym command line
symbolS *sym;
struct defsym_list *next;
- sym = symbol_new (defsyms->name, absolute_section, defsyms->value,
- &zero_address_frag);
+ sym = symbol_new (defsyms->name, absolute_section,
+ &zero_address_frag, defsyms->value);
/* 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
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));
}
projects / thirdparty / binutils-gdb.git / blobdiff