This code uses a slightly shorter insn.
Signed-off-by: Denys Vlasenko <[email protected]>
CC: Linus Torvalds <[email protected]>
CC: Oleg Nesterov <[email protected]>
CC: "H. Peter Anvin" <[email protected]>
CC: Andy Lutomirski <[email protected]>
CC: Frederic Weisbecker <[email protected]>
CC: X86 ML <[email protected]>
CC: Alexei Starovoitov <[email protected]>
CC: Will Drewry <[email protected]>
CC: Kees Cook <[email protected]>
CC: [email protected]
---
arch/x86/kernel/entry_64.S | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index 7bc8c24..5d639a6 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -272,6 +272,7 @@ system_call_fastpath:
ja badsys
movq %r10,%rcx
call *sys_call_table(,%rax,8) # XXX: rip relative
+from_badsys:
movq %rax,RAX(%rsp)
/*
* Syscall return path ending with SYSRET (fast path)
@@ -334,8 +335,8 @@ sysret_signal:
jmp int_check_syscall_exit_work
badsys:
- movq $-ENOSYS,RAX(%rsp)
- jmp ret_from_sys_call
+ movq $-ENOSYS,%rax
+ jmp from_badsys
#ifdef CONFIG_AUDITSYSCALL
/*
--
1.8.1.4
--
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