From: Andy Lutomirski <luto@kernel.org>
To: x86@kernel.org
Cc: linux-kernel@vger.kernel.org, Brian Gerst <brgerst@gmail.com>,
Borislav Petkov <bp@alien8.de>, Andy Lutomirski <luto@kernel.org>
Subject: [PATCH 3/3] x86/syscalls/64: Mark sys_iopl as using ptregs
Date: Sun, 31 Jan 2016 09:33:28 -0800 [thread overview]
Message-ID: <3de0ca692fa8bf414c5e3d7afe3e6195d1a10e1f.1454261517.git.luto@kernel.org> (raw)
In-Reply-To: <cover.1454261517.git.luto@kernel.org>
In-Reply-To: <cover.1454261517.git.luto@kernel.org>
sys_iopl both reads and writes pt_regs->flags. Mark it as using ptregs.
This isn't strictly necessary, as pt_regs->flags is available even
in the fast path, but this is very lightweight now that we have
syscall qualifiers and it could avoid some pain down the road.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
---
arch/x86/entry/syscalls/syscall_64.tbl | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/entry/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl
index dcf107ce2cd4..2e5b565adacc 100644
--- a/arch/x86/entry/syscalls/syscall_64.tbl
+++ b/arch/x86/entry/syscalls/syscall_64.tbl
@@ -178,7 +178,7 @@
169 common reboot sys_reboot
170 common sethostname sys_sethostname
171 common setdomainname sys_setdomainname
-172 common iopl sys_iopl
+172 common iopl sys_iopl/ptregs
173 common ioperm sys_ioperm
174 64 create_module
175 common init_module sys_init_module
--
2.5.0
next prev parent reply other threads:[~2016-01-31 17:33 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-31 17:33 [PATCH 0/3] x86/entry/64: Fixes for syscall rework Andy Lutomirski
2016-01-31 17:33 ` [PATCH 1/3] x86/entry/64: Fix an IRQ state error on ptregs-using syscalls Andy Lutomirski
2016-02-01 8:03 ` [tip:x86/asm] " tip-bot for Andy Lutomirski
2016-01-31 17:33 ` [PATCH 2/3] x86/entry/64: Fix fast-path syscall return register state Andy Lutomirski
2016-02-01 8:03 ` [tip:x86/asm] " tip-bot for Andy Lutomirski
2016-01-31 17:33 ` Andy Lutomirski [this message]
2016-02-01 8:04 ` [tip:x86/asm] x86/syscalls/64: Mark sys_iopl() as using ptregs tip-bot for Andy Lutomirski
2016-01-31 21:46 ` [PATCH 0/3] x86/entry/64: Fixes for syscall rework Borislav Petkov
2016-02-01 7:58 ` Ingo Molnar
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