1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
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.
--- gas/as.c.jj 2003-05-30 09:44:26.000000000 -0400
+++ gas/as.c 2003-06-04 07:43:05.000000000 -0400
@@ -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 pr
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 ();
--- gas/as.h.jj 2003-05-23 09:24:40.000000000 -0400
+++ gas/as.h 2003-06-04 05:17:39.000000000 -0400
@@ -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;
|
GitWeb