From a4c75cfd56e536c2b18556e8a482d88dffa0fffc Mon Sep 17 00:00:00 2001 From: Igor Zamyatin Date: Tue, 1 Apr 2014 10:16:04 -0700 Subject: Save/restore bound registers in _dl_runtime_resolve This patch saves and restores bound registers in symbol lookup for x86-64: 1. Branches without BND prefix clear bound registers. 2. x86-64 pass bounds in bound registers as specified in MPX psABI extension on hjl/mpx/master branch at https://github.com/hjl-tools/x86-64-psABI https://groups.google.com/forum/#!topic/x86-64-abi/KFsB0XTgWYc Binutils has been updated to create an alternate PLT to add BND prefix when branching to ld.so. * config.h.in (HAVE_MPX_SUPPORT): New #undef. * sysdeps/x86_64/configure.ac: Set HAVE_MPX_SUPPORT. * sysdeps/x86_64/configure: Regenerated. * sysdeps/x86_64/dl-trampoline.S (REGISTER_SAVE_AREA): New macro. (REGISTER_SAVE_RAX): Likewise. (REGISTER_SAVE_RCX): Likewise. (REGISTER_SAVE_RDX): Likewise. (REGISTER_SAVE_RSI): Likewise. (REGISTER_SAVE_RDI): Likewise. (REGISTER_SAVE_R8): Likewise. (REGISTER_SAVE_R9): Likewise. (REGISTER_SAVE_BND0): Likewise. (REGISTER_SAVE_BND1): Likewise. (REGISTER_SAVE_BND2): Likewise. (_dl_runtime_resolve): Use them. Save and restore Intel MPX bound registers when calling _dl_fixup. --- ChangeLog | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'ChangeLog') diff --git a/ChangeLog b/ChangeLog index 4598b60648..7cc48ce4e8 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,24 @@ +2014-04-09 Igor Zamyatin + H.J. Lu + + * config.h.in (HAVE_MPX_SUPPORT): New #undef. + * sysdeps/x86_64/configure.ac: Set HAVE_MPX_SUPPORT. + * sysdeps/x86_64/configure: Regenerated. + * sysdeps/x86_64/dl-trampoline.S (REGISTER_SAVE_AREA): New + macro. + (REGISTER_SAVE_RAX): Likewise. + (REGISTER_SAVE_RCX): Likewise. + (REGISTER_SAVE_RDX): Likewise. + (REGISTER_SAVE_RSI): Likewise. + (REGISTER_SAVE_RDI): Likewise. + (REGISTER_SAVE_R8): Likewise. + (REGISTER_SAVE_R9): Likewise. + (REGISTER_SAVE_BND0): Likewise. + (REGISTER_SAVE_BND1): Likewise. + (REGISTER_SAVE_BND2): Likewise. + (_dl_runtime_resolve): Use them. Save and restore Intel MPX + bound registers when calling _dl_fixup. + 2014-04-09 Adhemerval Zanella * bits/string.h (_STRING_ARCH_unaligned): Define it to 0. -- cgit v1.2.3