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006-03-02 Jakub Jelinek <jakub@redhat.com>
* elf/check-textrel.c: Include config.h. (AB(handle_file)): Don't fail if PF_X | PF_W on architectures known to have executable writable PLT. * sysdeps/powerpc/powerpc32/configure.in (HAVE_PPC_SECURE_PLT): New test. * config.h.in (HAVE_PPC_SECURE_PLT): Add. * malloc/malloc.c (MALLOC_ALIGNMENT): Set to __alignof__ (long double) if long double is more aligned than 2 * SIZE_SZ. (misaligned_chunk): Define. (public_rEALLOc, _int_free, _int_realloc): Use it.
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ChangeLog
14
ChangeLog
@ -1,3 +1,17 @@
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006-03-02 Jakub Jelinek <jakub@redhat.com>
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* elf/check-textrel.c: Include config.h.
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(AB(handle_file)): Don't fail if PF_X | PF_W on architectures known
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to have executable writable PLT.
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* sysdeps/powerpc/powerpc32/configure.in (HAVE_PPC_SECURE_PLT): New
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test.
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* config.h.in (HAVE_PPC_SECURE_PLT): Add.
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* malloc/malloc.c (MALLOC_ALIGNMENT): Set to __alignof__ (long double)
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if long double is more aligned than 2 * SIZE_SZ.
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(misaligned_chunk): Define.
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(public_rEALLOc, _int_free, _int_realloc): Use it.
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2006-01-05 H.J. Lu <hongjiu.lu@intel.com>
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[BZ #2013]
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@ -200,6 +200,9 @@
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/* Define if your assembler and linker support R_PPC_REL16* relocs. */
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#undef HAVE_ASM_PPC_REL16
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/* Define if your compiler defaults to -msecure-plt mode on ppc. */
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#undef HAVE_PPC_SECURE_PLT
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/* Define if __stack_chk_guard canary should be randomized at program startup. */
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#undef ENABLE_STACKGUARD_RANDOMIZE
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@ -18,6 +18,7 @@
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include "config.h"
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#include <byteswap.h>
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#include <elf.h>
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#include <endian.h>
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@ -88,7 +89,15 @@ AB(handle_file) (const char *fname, int fd)
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{
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printf ("%s: segment %zu is executable and writable\n",
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fname, cnt);
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#if !defined __sparc__ \
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&& !defined __alpha__ \
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&& (!defined __powerpc__ || defined __powerpc64__ || defined HAVE_PPC_SECURE_PLT)
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/* sparc, sparc64, alpha and powerpc32 (the last one only when using
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-mbss-plt) are expected to have PF_X | PF_W segment containing .plt
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section, it is part of their ABI. It is bad security wise, nevertheless
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this test shouldn't fail because of this. */
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return 1;
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#endif
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}
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if (dynphdr == NULL)
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29
sysdeps/powerpc/powerpc32/configure
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29
sysdeps/powerpc/powerpc32/configure
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@ -31,3 +31,32 @@ if test $libc_cv_ppc_rel16 = yes; then
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_ACEOF
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fi
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# See whether GCC uses -msecure-plt.
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echo "$as_me:$LINENO: checking for -msecure-plt by default" >&5
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echo $ECHO_N "checking for -msecure-plt by default... $ECHO_C" >&6
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if test "${libc_cv_ppc_secure_plt+set}" = set; then
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echo $ECHO_N "(cached) $ECHO_C" >&6
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else
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echo 'int foo (void) { extern int bar; return bar; }' > conftest.c
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libc_cv_ppc_secure_plt=no
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if { ac_try='${CC-cc} -S $CFLAGS conftest.c -fpic -o conftest.s 1>&5'
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{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; }; then
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if grep '_GLOBAL_OFFSET_TABLE_-.*@ha' conftest.s > /dev/null 2>&1; then
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libc_cv_ppc_secure_plt=yes
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fi
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fi
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rm -rf conftest*
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fi
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echo "$as_me:$LINENO: result: $libc_cv_ppc_secure_plt" >&5
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echo "${ECHO_T}$libc_cv_ppc_secure_plt" >&6
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if test $libc_cv_ppc_secure_plt = yes; then
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cat >>confdefs.h <<\_ACEOF
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#define HAVE_PPC_SECURE_PLT 1
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_ACEOF
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fi
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@ -16,3 +16,17 @@ rm -f conftest*])
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if test $libc_cv_ppc_rel16 = yes; then
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AC_DEFINE(HAVE_ASM_PPC_REL16)
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fi
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# See whether GCC uses -msecure-plt.
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AC_CACHE_CHECK(for -msecure-plt by default, libc_cv_ppc_secure_plt, [dnl
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echo 'int foo (void) { extern int bar; return bar; }' > conftest.c
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libc_cv_ppc_secure_plt=no
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if AC_TRY_COMMAND(${CC-cc} -S $CFLAGS conftest.c -fpic -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
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if grep '_GLOBAL_OFFSET_TABLE_-.*@ha' conftest.s > /dev/null 2>&1; then
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libc_cv_ppc_secure_plt=yes
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fi
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fi
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rm -rf conftest*])
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if test $libc_cv_ppc_secure_plt = yes; then
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AC_DEFINE(HAVE_PPC_SECURE_PLT)
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fi
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