* 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.

diff --git a/gas/ChangeLog b/gas/ChangeLog
index f4bd381f1094d6facb7a0ec6e2cbdee5483fa631..fd23b8f73e18d9ce97d4275301240956f1075ed2 100644 (file)
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,11 @@
+2003-06-04  Jakub Jelinek  <jakub@redhat.com>
+
+       * 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.
+
 2003-06-03  Chris Demetriou  <cgd@broadcom.com>
 
        * config/tc-mips.c: (OPTION_ARCH_BASE, OPTION_ASE_BASE)

diff --git a/gas/as.c b/gas/as.c
index 27a0089fcefe0967161477473f1ccfaa035183e2..5ff140386af888ff851051ebf3fe65711f33cfa7 100644 (file)
--- a/gas/as.c
+++ b/gas/as.c
@@ -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 ();

diff --git a/gas/as.h b/gas/as.h
index 2c5a22ccde40b1661be1a77beab08d7ed1212a3c..21219644d5aa02f2a6cd4ef9fa5cf6b0d411f7a2 100644 (file)
--- a/gas/as.h
+++ b/gas/as.h
@@ -436,6 +436,12 @@ COMMON int flag_strip_local_absolute;
 /* True if we should generate a traditional format object file.  */
 COMMON int flag_traditional_format;
 
+/* TRUE if .note.GNU-stack section with SEC_CODE should be created */
+COMMON int flag_execstack;
+
+/* TRUE if .note.GNU-stack section with SEC_CODE should be created */
+COMMON int flag_noexecstack;
+
 /* name of emitted object file */
 COMMON char *out_file_name;