From ed20b3d9cc5ce78fd71f32c47b2eb7a897c7a25d Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Tue, 13 Jan 2004 08:36:54 +0000 Subject: Update. 2004-01-13 Ulrich Drepper * Makeconfig: Define relro-LDFLAGS if have-z-relro==yes. Add it to LDFLAGS.so and LDFLAGS-rtld. (+link): Add relro-LDFLAGS. * Makeconfig (shlib.lds): Place __libc_subfreeres, __libc_atexit, and __libc_thread_subfreeres sections after .jcr section. * config.make.in: Add have-z-relro. * configure.in: Add check for -z relro option. * include/link.h (struct link_map): Add relro_addr and relro_size members. * elf/dl-load.c (_dl_map_object_from_fd): Recognize PT_GNU_RELRO. * elf/dl-reloc.c (_dl_relocate_object): At the end, make relro part of loaded segments read-only. * elf/elf.h: Define PT_GNU_RELRO. * elf/rtld.c (_dl_start): Recognize PT_GNU_RELRO of ld.so. (dl_main): Recognize PT_GNU_RELRO of the application. Call _dl_debug_initialize and initialize l_info[DT_DEBUG] before relocations. --- configure.in | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'configure.in') diff --git a/configure.in b/configure.in index 77e91e3..9d2b347 100644 --- a/configure.in +++ b/configure.in @@ -1283,6 +1283,16 @@ EOF rm -f conftest*]) AC_SUBST(libc_cv_z_initfirst) + AC_CACHE_CHECK(for -z relro option, + libc_cv_z_relro, [dnl + if AC_TRY_COMMAND([${CC-cc} -v --help 2>&1|grep "z relro" 1>&AS_MESSAGE_LOG_FD]) + then + libc_cv_z_relro=yes + else + libc_cv_z_relro=no + fi]) + AC_SUBST(libc_cv_z_relro) + AC_CACHE_CHECK(for -Bgroup option, libc_cv_Bgroup, [dnl cat > conftest.c <