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| author | Ross Zwisler <ross.zwisler@linux.intel.com> | 2018-02-03 00:26:26 -0700 |
|---|---|---|
| committer | Ross Zwisler <ross.zwisler@linux.intel.com> | 2018-02-03 00:26:26 -0700 |
| commit | ee95f4059a833839bf52972191b2d4c3d3cec552 (patch) | |
| tree | a1c8587d9b82e64a75dde376a90a3d69b0f4847a /arch/x86/entry/entry_64.S | |
| parent | d121f07691415df824e6b60520f782f6d13b3c81 (diff) | |
| parent | f81e1d35a6e36d30888c46283b8dd1022e847124 (diff) | |
| download | op-kernel-dev-ee95f4059a833839bf52972191b2d4c3d3cec552.zip op-kernel-dev-ee95f4059a833839bf52972191b2d4c3d3cec552.tar.gz | |
Merge branch 'for-4.16/nfit' into libnvdimm-for-next
Diffstat (limited to 'arch/x86/entry/entry_64.S')
| -rw-r--r-- | arch/x86/entry/entry_64.S | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S index f048e38..4f8e1d3 100644 --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -37,6 +37,7 @@ #include <asm/pgtable_types.h> #include <asm/export.h> #include <asm/frame.h> +#include <asm/nospec-branch.h> #include <linux/err.h> #include "calling.h" @@ -191,7 +192,7 @@ ENTRY(entry_SYSCALL_64_trampoline) */ pushq %rdi movq $entry_SYSCALL_64_stage2, %rdi - jmp *%rdi + JMP_NOSPEC %rdi END(entry_SYSCALL_64_trampoline) .popsection @@ -270,7 +271,12 @@ entry_SYSCALL_64_fastpath: * It might end up jumping to the slow path. If it jumps, RAX * and all argument registers are clobbered. */ +#ifdef CONFIG_RETPOLINE + movq sys_call_table(, %rax, 8), %rax + call __x86_indirect_thunk_rax +#else call *sys_call_table(, %rax, 8) +#endif .Lentry_SYSCALL_64_after_fastpath_call: movq %rax, RAX(%rsp) @@ -442,7 +448,7 @@ ENTRY(stub_ptregs_64) jmp entry_SYSCALL64_slow_path 1: - jmp *%rax /* Called from C */ + JMP_NOSPEC %rax /* Called from C */ END(stub_ptregs_64) .macro ptregs_stub func @@ -521,7 +527,7 @@ ENTRY(ret_from_fork) 1: /* kernel thread */ movq %r12, %rdi - call *%rbx + CALL_NOSPEC %rbx /* * A kernel thread is allowed to return here after successfully * calling do_execve(). Exit to userspace to complete the execve() |
