lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Wed, 16 Oct 2013 11:18:05 +0800 From: Jiang Liu <liuj97@...il.com> To: Steven Rostedt <rostedt@...dmis.org>, Catalin Marinas <catalin.marinas@....com>, Will Deacon <will.deacon@....com>, Sandeepa Prabhu <sandeepa.prabhu@...aro.org> Cc: Jiang Liu <jiang.liu@...wei.com>, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: [PATCH v3 0/7] Optimize jump label implementation for ARM64 From: Jiang Liu <jiang.liu@...wei.com> This patchset tries to optimize arch specfic jump label implementation for ARM64 by dynamic kernel text patching. To enable this feature, your toolchain must support "asm goto" extension and "%c" constraint extesion. Current GCC for AARCH64 doesn't support "%c", so you need a GCC patch similiar to this: http://gcc.gnu.org/viewcvs/gcc/trunk/gcc/config/arm/arm.c?view=patch&r1=175293&r2=175565&pathrev=175565 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48637 It has been tested on ARM Fast mode and a real hardware platform. Any comments are welcomed! V2->V3: 1) fix a bug in comparing signed and unsigned values 2) detect big endian by checking __AARCH64EB__ V1->V2: address review comments of V1 1) refine comments 2) add a new interface to always synchronize with stop_machine() when patching code 3) handle endian issue when patching code Jiang Liu (7): arm64: introduce basic aarch64 instruction decoding helpers arm64: introduce interfaces to hotpatch kernel and module code arm64: move encode_insn_immediate() from module.c to insn.c arm64: introduce aarch64_insn_gen_{nop|branch_imm}() helper functions arm64, jump label: detect %c support for ARM64 arm64, jump label: optimize jump label implementation jump_label: use defined macros instead of hard-coding for better readability arch/arm64/Kconfig | 1 + arch/arm64/include/asm/insn.h | 79 ++++++++++ arch/arm64/include/asm/jump_label.h | 52 +++++++ arch/arm64/kernel/Makefile | 3 +- arch/arm64/kernel/insn.c | 285 ++++++++++++++++++++++++++++++++++++ arch/arm64/kernel/jump_label.c | 60 ++++++++ arch/arm64/kernel/module.c | 151 ++++--------------- include/linux/jump_label.h | 15 +- scripts/gcc-goto.sh | 2 +- 9 files changed, 522 insertions(+), 126 deletions(-) create mode 100644 arch/arm64/include/asm/insn.h create mode 100644 arch/arm64/include/asm/jump_label.h create mode 100644 arch/arm64/kernel/insn.c create mode 100644 arch/arm64/kernel/jump_label.c -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists