Messages in this thread Patch in this message | | | From | Yu-cheng Yu <> | Subject | [PATCH v28 05/10] x86/cet/ibt: Update ELF header parsing for Indirect Branch Tracking | Date | Thu, 22 Jul 2021 13:57:18 -0700 |
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An ELF file's .note.gnu.property indicates features the file supports. The property is parsed at loading time and passed to arch_setup_elf_ property(). Update it for Indirect Branch Tracking.
Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com> Cc: Kees Cook <keescook@chromium.org> --- v27: - Remove selecting of ARCH_USE_GNU_PROPERTY and ARCH_BINFMT_ELF_STATE, since they are already selected by X86_64.
arch/x86/kernel/process_64.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index 4271963fdd8c..4ab751a5146e 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -884,6 +884,12 @@ int arch_setup_elf_property(struct arch_elf_state *state) if (state->gnu_property & GNU_PROPERTY_X86_FEATURE_1_SHSTK) r = shstk_setup(); + + if (r < 0) + return r; + + if (state->gnu_property & GNU_PROPERTY_X86_FEATURE_1_IBT) + r = ibt_setup(); #endif return r; -- 2.21.0
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