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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
}
|
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