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* as.c (show_usage): Document --execstack and --noexecstack.

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(parse_args): Add --execstack and --noexecstack.
	(main): Create .note.GNU-stack section if --execstack or
	--noexecstack was given on comand line, set its SHF_EXECINSTR bit.
	* as.h (flag_execstack, flag_noexecstack): New.
This commit is contained in:
Jakub Jelinek
2003-06-04 16:54:45 +00:00
parent b21fd293ac
commit 68d55fe3f0
3 changed files with 52 additions and 1 deletions
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39
gas/as.c
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@@ -267,6 +267,12 @@ Options:\n\
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"));
@@ -437,7 +443,13 @@ parse_args (pargc, pargv)
{"warn", no_argument, NULL, OPTION_WARN},
#define OPTION_TARGET_HELP (OPTION_STD_BASE + 19)
{"target-help", no_argument, NULL, OPTION_TARGET_HELP},
#define OPTION_WARN_FATAL (OPTION_STD_BASE + 20)
#if defined BFD_ASSEMBLER && (defined OBJ_ELF || defined OBJ_MAYBE_ELF)
#define OPTION_EXECSTACK (OPTION_STD_BASE + 20)
{"execstack", no_argument, NULL, OPTION_EXECSTACK},
#define OPTION_NOEXECSTACK (OPTION_STD_BASE + 21)
{"noexecstack", no_argument, NULL, OPTION_NOEXECSTACK},
#endif
#define OPTION_WARN_FATAL (OPTION_STD_BASE + 22)
{"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. */
@@ -698,6 +710,18 @@ the GNU General Public License. This program has absolutely no warranty.\n"));
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;
@@ -907,6 +931,19 @@ main (argc, argv)
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 ();