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
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
Add backwards compat support for gcc-3.x ssp ... older ssp versions
used __guard and __stack_smash_handler symbols while gcc-4.1 and newer
uses __stack_chk_guard and __stack_chk_fail.
--- config.h.in
+++ config.h.in
@@ -42,6 +42,9 @@
assembler instructions per line. Default is `;' */
#undef ASM_LINE_SEP
+/* Define if we want to enable support for old ssp symbols */
+#undef ENABLE_OLD_SSP_COMPAT
+
/* Define if not using ELF, but `.init' and `.fini' sections are available. */
#undef HAVE_INITFINI
--- configure
+++ configure
@@ -1378,6 +1378,9 @@ Optional Features:
--enable-kernel=VERSION compile for compatibility with kernel not older than
VERSION
--enable-all-warnings enable all useful warnings gcc can issue
+ --disable-old-ssp-compat
+ enable support for older ssp symbols
+ [default=no]
--enable-multi-arch enable single DSO with optimizations for multiple
architectures
--enable-experimental-malloc
@@ -6462,6 +6465,20 @@ fi
$as_echo "$libc_cv_ssp" >&6; }
+# Check whether --enable-old-ssp-compat or --disable-old-ssp-compat was given.
+if test "${enable_old_ssp_compat+set}" = set; then
+ enableval="$enable_old_ssp_compat"
+ enable_old_ssp_compat=$enableval
+else
+ enable_old_ssp_compat=no
+fi;
+if test "x$enable_old_ssp_compat" = "xyes"; then
+ cat >>confdefs.h <<\_ACEOF
+#define ENABLE_OLD_SSP_COMPAT 1
+_ACEOF
+
+fi
+
{ $as_echo "$as_me:$LINENO: checking for -fgnu89-inline" >&5
$as_echo_n "checking for -fgnu89-inline... " >&6; }
if test "${libc_cv_gnu89_inline+set}" = set; then
--- configure.in
+++ configure.in
@@ -1641,6 +1641,15 @@ fi
rm -f conftest*])
AC_SUBST(libc_cv_ssp)
+AC_ARG_ENABLE([old-ssp-compat],
+ AC_HELP_STRING([--enable-old-ssp-compat],
+ [enable support for older ssp symbols @<:@default=no@:>@]),
+ [enable_old_ssp_compat=$enableval],
+ [enable_old_ssp_compat=no])
+if test "x$enable_old_ssp_compat" = "xyes"; then
+ AC_DEFINE(ENABLE_OLD_SSP_COMPAT)
+fi
+
AC_CACHE_CHECK(for -fgnu89-inline, libc_cv_gnu89_inline, [dnl
cat > conftest.c <<EOF
int foo;
--- csu/libc-start.c
+++ csu/libc-start.c
@@ -37,6 +37,9 @@ extern void __pthread_initialize_minimal
uintptr_t __stack_chk_guard attribute_relro;
# endif
#endif
+#ifdef ENABLE_OLD_SSP_COMPAT
+uintptr_t __guard attribute_relro;
+#endif
#ifdef HAVE_PTR_NTHREADS
/* We need atomic operations. */
@@ -141,6 +145,9 @@ LIBC_START_MAIN (int (*main) (int, char
/* Set up the stack checker's canary. */
uintptr_t stack_chk_guard = _dl_setup_stack_chk_guard (_dl_random);
+#ifdef ENABLE_OLD_SSP_COMPAT
+ __guard = stack_chk_guard;
+#endif
# ifdef THREAD_SET_STACK_GUARD
THREAD_SET_STACK_GUARD (stack_chk_guard);
# else
--- csu/Versions
+++ csu/Versions
@@ -17,6 +17,12 @@ libc {
# New special glibc functions.
gnu_get_libc_release; gnu_get_libc_version;
}
+ GLIBC_2.3.2 {
+%ifdef ENABLE_OLD_SSP_COMPAT
+ # global objects and functions for the old propolice patch in gcc
+ __guard;
+%endif
+ }
GLIBC_PRIVATE {
%if HAVE___THREAD
# This version is for the TLS symbol, GLIBC_2.0 is the old object symbol.
--- debug/Versions
+++ debug/Versions
@@ -10,6 +10,12 @@ libc {
# These are to support some gcc features.
__cyg_profile_func_enter; __cyg_profile_func_exit;
}
+%ifdef ENABLE_OLD_SSP_COMPAT
+ GLIBC_2.3.2 {
+ # backwards ssp compat support; alias to __stack_chk_fail
+ __stack_smash_handler;
+ }
+%endif
GLIBC_2.3.4 {
__chk_fail;
__memcpy_chk; __memmove_chk; __mempcpy_chk; __memset_chk; __stpcpy_chk;
--- elf/rtld.c
+++ elf/rtld.c
@@ -89,6 +89,9 @@ INTDEF(_dl_argv)
in thread local area. */
uintptr_t __stack_chk_guard attribute_relro;
#endif
+#ifdef ENABLE_OLD_SSP_COMPAT
+uintptr_t __guard attribute_relro;
+#endif
/* Only exported for architectures that don't store the pointer guard
value in thread local area. */
@@ -1817,6 +1821,9 @@ ERROR: ld.so: object '%s' cannot be load
/* Set up the stack checker's canary. */
uintptr_t stack_chk_guard = _dl_setup_stack_chk_guard (_dl_random);
+#ifdef ENABLE_OLD_SSP_COMPAT
+ __guard = stack_chk_guard;
+#endif
#ifdef THREAD_SET_STACK_GUARD
THREAD_SET_STACK_GUARD (stack_chk_guard);
#else
--- elf/Versions
+++ elf/Versions
@@ -43,6 +43,12 @@ ld {
# runtime interface to TLS
__tls_get_addr;
}
+%ifdef ENABLE_OLD_SSP_COMPAT
+ GLIBC_2.3.2 {
+ # backwards ssp compat support
+ __guard;
+ }
+%endif
GLIBC_2.4 {
# stack canary
__stack_chk_guard;
--- Versions.def
+++ Versions.def
@@ -109,6 +109,9 @@ ld {
GLIBC_2.0
GLIBC_2.1
GLIBC_2.3
+%ifdef ENABLE_OLD_SSP_COMPAT
+ GLIBC_2.3.2
+%endif
GLIBC_2.4
GLIBC_PRIVATE
}
|
