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authorJakub Jelinek <jakub@redhat.com>2003-06-04 16:54:45 +0000
committerJakub Jelinek <jakub@redhat.com>2003-06-04 16:54:45 +0000
commit68d55fe3f008459534e270cc7b54f122846466f9 (patch)
tree458470a157a612fad7f94e850c86aba03ae3f221 /gas/as.c
parentb21fd293ac00e7804f1d576440e5bd2e38f1a2a3 (diff)
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* as.c (show_usage): Document --execstack and --noexecstack.
(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.
Diffstat (limited to 'gas/as.c')
-rw-r--r--gas/as.c39
1 files changed, 38 insertions, 1 deletions
diff --git a/gas/as.c b/gas/as.c
index 27a0089..5ff1403 100644
--- a/gas/as.c
+++ b/gas/as.c
@@ -268,6 +268,12 @@ Options:\n\
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, _("\
@@ -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 ();