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. --- include/link.h | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'include') diff --git a/include/link.h b/include/link.h index 5d10bd6679..bc72310ea8 100644 --- a/include/link.h +++ b/include/link.h @@ -1,6 +1,6 @@ /* Data structure for communication from the run-time dynamic linker for loaded ELF shared objects. - Copyright (C) 1995-2002, 2003 Free Software Foundation, Inc. + Copyright (C) 1995-2002, 2003, 2004 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -280,6 +280,11 @@ struct link_map /* Index of the module in the dtv array. */ size_t l_tls_modid; #endif + + /* Information used to change permission after the relocations are + done. */ + ElfW(Addr) l_relro_addr; + size_t l_relro_size; }; struct dl_phdr_info -- cgit 1.4.1