From ca3fe95e469b9daec153caa2c90665f5daaec2b5 Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Thu, 5 Mar 2015 06:34:39 -0800 Subject: Add extern_protected_data and set it for x86 With copy relocation, address of protected data defined in the shared library may be external. This patch adds extern_protected_data and changes _bfd_elf_symbol_refs_local_p to return false for protected data if extern_protected_data is true. bfd/ PR ld/pr15228 PR ld/pr17709 * elf-bfd.h (elf_backend_data): Add extern_protected_data. * elf32-i386.c (elf_backend_extern_protected_data): New. Defined to 1. * elf64-x86-64.c (elf_backend_extern_protected_data): Likewise. * elflink.c (_bfd_elf_adjust_dynamic_copy): Don't error on copy relocs against protected symbols if extern_protected_data is true. (_bfd_elf_symbol_refs_local_p): Don't return true on protected non-function symbols if extern_protected_data is true. * elfxx-target.h (elf_backend_extern_protected_data): New. Default to 0. (elfNN_bed): Initialize extern_protected_data with elf_backend_extern_protected_data. ld/testsuite/ PR ld/pr15228 PR ld/pr17709 * ld-i386/i386.exp (i386tests): Add a test for PR ld/17709. * ld-i386/pr17709-nacl.rd: New file. * ld-i386/pr17709.rd: Likewise. * ld-i386/pr17709a.s: Likewise. * ld-i386/pr17709b.s: Likewise. * ld-i386/protected3.d: Updated. * ld-i386/protected3.s: Likewise. * ld-x86-64/pr17709-nacl.rd: New file. * ld-x86-64/pr17709.rd: Likewise. * ld-x86-64/pr17709a.s: Likewise. * ld-x86-64/pr17709b.s: Likewise. * ld-x86-64/protected3.d: Updated. * ld-x86-64/protected3.s: Likewise. * ld-x86-64/x86-64.exp (x86_64tests): Add a test for PR ld/17709. --- bfd/elfxx-target.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'bfd/elfxx-target.h') diff --git a/bfd/elfxx-target.h b/bfd/elfxx-target.h index 211c0a1..9760db4 100644 --- a/bfd/elfxx-target.h +++ b/bfd/elfxx-target.h @@ -117,6 +117,9 @@ #ifndef elf_backend_caches_rawsize #define elf_backend_caches_rawsize 0 #endif +#ifndef elf_backend_extern_protected_data +#define elf_backend_extern_protected_data 0 +#endif #ifndef elf_backend_stack_align #define elf_backend_stack_align 16 #endif @@ -801,7 +804,8 @@ static struct elf_backend_data elfNN_bed = elf_backend_want_dynbss, elf_backend_want_p_paddr_set_to_zero, elf_backend_default_execstack, - elf_backend_caches_rawsize + elf_backend_caches_rawsize, + elf_backend_extern_protected_data }; /* Forward declaration for use when initialising alternative_target field. */ -- cgit v1.1