From: Adrian Hunter <adrian.hunter@intel.com>
To: Yu-cheng Yu <yu-cheng.yu@intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
linux-mm@kvack.org, linux-arch@vger.kernel.org,
linux-api@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
Andy Lutomirski <luto@amacapital.net>,
Balbir Singh <bsingharora@gmail.com>,
Borislav Petkov <bp@alien8.de>,
Cyrill Gorcunov <gorcunov@gmail.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Eugene Syromiatnikov <esyr@redhat.com>,
Florian Weimer <fweimer@redhat.com>,
"H.J. Lu" <hjl.tools@gmail.com>, Jann Horn <jannh@google.com>,
Jonathan Corbet <corbet@lwn.net>,
Kees Cook <keescook@chromium.org>,
Mike Kravetz <mike.kravetz@oracle.com>,
Nadav Amit <nadav.amit@gmail.com>,
Oleg Nesterov <oleg@redhat.com>, Pavel Machek <pavel@ucw.cz>,
Peter Zijlstra <peterz@infradead.org>,
Randy Dunlap <rdunlap@infradead.org>,
"Ravi V. Shankar" <ravi.v.shankar@intel.com>,
Vedvyas Shanbhogue <vedvyas.shanbhogue@intel.com>,
Dave Martin <Dave.Martin@arm.com>
Subject: Re: [PATCH v8 07/14] x86/cet/ibt: Add ENDBR to op-code-map
Date: Fri, 8 Nov 2019 15:19:40 +0200 [thread overview]
Message-ID: <5b81028b-2230-51c4-f504-10067cb59bf8@intel.com> (raw)
In-Reply-To: <20190813205359.12196-8-yu-cheng.yu@intel.com>
On 13/08/19 11:53 PM, Yu-cheng Yu wrote:
> Add control transfer terminating instructions:
>
> ENDBR64/ENDBR32:
> Mark a valid 64/32-bit control transfer endpoint.
>
> Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com>
> ---
> arch/x86/lib/x86-opcode-map.txt | 13 +++++++++++--
> tools/objtool/arch/x86/lib/x86-opcode-map.txt | 13 +++++++++++--
> 2 files changed, 22 insertions(+), 4 deletions(-)
>
> diff --git a/arch/x86/lib/x86-opcode-map.txt b/arch/x86/lib/x86-opcode-map.txt
> index c5e825d44766..fbc53481bc59 100644
> --- a/arch/x86/lib/x86-opcode-map.txt
> +++ b/arch/x86/lib/x86-opcode-map.txt
> @@ -620,7 +620,16 @@ ea: SAVEPREVSSP (f3)
> # Skip 0xeb-0xff
> EndTable
>
> -Table: 3-byte opcode 2 (0x0f 0x38)
> +Table: 3-byte opcode 2 (0x0f 0x1e)
> +Referrer:
> +AVXcode:
> +# Skip 0x00-0xf9
> +fa: ENDBR64 (f3)
> +fb: ENDBR32 (f3)
endbr32 and endbr64 have 2-byte opcodes (0F 1E) and a ModRM byte, so a new
Grp is needed
> +#skip 0xfc-0xff
> +EndTable
> +
> +Table: 3-byte opcode 3 (0x0f 0x38)
> Referrer: 3-byte escape 1
> AVXcode: 2
> # 0x0f 0x38 0x00-0x0f
> @@ -804,7 +813,7 @@ f6: ADCX Gy,Ey (66) | ADOX Gy,Ey (F3) | MULX By,Gy,rDX,Ey (F2),(v) | WRSS Pq,Qq
> f7: BEXTR Gy,Ey,By (v) | SHLX Gy,Ey,By (66),(v) | SARX Gy,Ey,By (F3),(v) | SHRX Gy,Ey,By (F2),(v)
> EndTable
>
> -Table: 3-byte opcode 3 (0x0f 0x3a)
> +Table: 3-byte opcode 4 (0x0f 0x3a)
> Referrer: 3-byte escape 2
> AVXcode: 3
> # 0x0f 0x3a 0x00-0xff
> diff --git a/tools/objtool/arch/x86/lib/x86-opcode-map.txt b/tools/objtool/arch/x86/lib/x86-opcode-map.txt
> index c5e825d44766..fbc53481bc59 100644
> --- a/tools/objtool/arch/x86/lib/x86-opcode-map.txt
> +++ b/tools/objtool/arch/x86/lib/x86-opcode-map.txt
> @@ -620,7 +620,16 @@ ea: SAVEPREVSSP (f3)
> # Skip 0xeb-0xff
> EndTable
>
> -Table: 3-byte opcode 2 (0x0f 0x38)
> +Table: 3-byte opcode 2 (0x0f 0x1e)
> +Referrer:
> +AVXcode:
> +# Skip 0x00-0xf9
> +fa: ENDBR64 (f3)
> +fb: ENDBR32 (f3)
> +#skip 0xfc-0xff
> +EndTable
> +
> +Table: 3-byte opcode 3 (0x0f 0x38)
> Referrer: 3-byte escape 1
> AVXcode: 2
> # 0x0f 0x38 0x00-0x0f
> @@ -804,7 +813,7 @@ f6: ADCX Gy,Ey (66) | ADOX Gy,Ey (F3) | MULX By,Gy,rDX,Ey (F2),(v) | WRSS Pq,Qq
> f7: BEXTR Gy,Ey,By (v) | SHLX Gy,Ey,By (66),(v) | SARX Gy,Ey,By (F3),(v) | SHRX Gy,Ey,By (F2),(v)
> EndTable
>
> -Table: 3-byte opcode 3 (0x0f 0x3a)
> +Table: 3-byte opcode 4 (0x0f 0x3a)
> Referrer: 3-byte escape 2
> AVXcode: 3
> # 0x0f 0x3a 0x00-0xff
>
next prev parent reply other threads:[~2019-11-08 13:20 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-13 20:53 [PATCH v8 00/14] Control-flow Enforcement: Branch Tracking, PTRACE Yu-cheng Yu
2019-08-13 20:53 ` [PATCH v8 01/14] x86/cet/ibt: Add Kconfig option for user-mode Indirect Branch Tracking Yu-cheng Yu
2019-08-13 20:53 ` [PATCH v8 02/14] x86/cet/ibt: User-mode indirect branch tracking support Yu-cheng Yu
2019-08-13 20:53 ` [PATCH v8 03/14] x86/cet/ibt: Handle signals for end branch Yu-cheng Yu
2019-08-13 20:53 ` [PATCH v8 04/14] mm/mmap: Add IBT bitmap size to address space limit check Yu-cheng Yu
2019-08-13 20:53 ` [PATCH v8 05/14] x86/cet/ibt: ELF header parsing for IBT Yu-cheng Yu
2019-08-13 20:53 ` [PATCH v8 06/14] x86/cet/ibt: Add arch_prctl functions " Yu-cheng Yu
2019-08-13 20:53 ` [PATCH v8 07/14] x86/cet/ibt: Add ENDBR to op-code-map Yu-cheng Yu
2019-11-08 13:19 ` Adrian Hunter [this message]
2019-08-13 20:53 ` [PATCH v8 08/14] x86/vdso: Insert endbr32/endbr64 to vDSO Yu-cheng Yu
2019-08-13 20:53 ` [PATCH v8 09/14] x86/vdso/32: Add ENDBR32 to __kernel_vsyscall entry point Yu-cheng Yu
2019-08-13 20:53 ` [PATCH v8 10/14] x86/vsyscall/64: Add ENDBR64 to vsyscall entry points Yu-cheng Yu
2019-08-13 20:53 ` [PATCH v8 11/14] x86/vsyscall/64: Fixup shadow stack and branch tracking for vsyscall Yu-cheng Yu
2019-08-13 20:53 ` [PATCH v8 12/14] x86/cet: Add PTRACE interface for CET Yu-cheng Yu
2019-08-13 20:53 ` [PATCH v8 13/14] x86: Discard .note.gnu.property sections Yu-cheng Yu
2019-08-13 20:53 ` [PATCH v8 14/14] Introduce arch_prctl(ARCH_X86_CET_MARK_LEGACY_CODE) Yu-cheng Yu
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