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author | Masami Hiramatsu <mhiramat@kernel.org> | 2018-01-19 01:14:21 +0900 |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2018-01-19 16:31:28 +0100 |
commit | 736e80a4213e9bbce40a7c050337047128b472ac (patch) | |
tree | 1aedc475ad8df60cc8b0654e77ce7050179980a8 /arch/x86/kernel | |
parent | 6f41c34d69eb005e7848716bbcafc979b35037d5 (diff) | |
download | linux-stable-736e80a4213e9bbce40a7c050337047128b472ac.tar.gz linux-stable-736e80a4213e9bbce40a7c050337047128b472ac.tar.bz2 linux-stable-736e80a4213e9bbce40a7c050337047128b472ac.zip |
retpoline: Introduce start/end markers of indirect thunk
Introduce start/end markers of __x86_indirect_thunk_* functions.
To make it easy, consolidate .text.__x86.indirect_thunk.* sections
to one .text.__x86.indirect_thunk section and put it in the
end of kernel text section and adds __indirect_thunk_start/end
so that other subsystem (e.g. kprobes) can identify it.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: David Woodhouse <dwmw@amazon.co.uk>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linux-foundation.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/151629206178.10241.6828804696410044771.stgit@devbox
Diffstat (limited to 'arch/x86/kernel')
-rw-r--r-- | arch/x86/kernel/vmlinux.lds.S | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S index 1e413a9326aa..9b138a06c1a4 100644 --- a/arch/x86/kernel/vmlinux.lds.S +++ b/arch/x86/kernel/vmlinux.lds.S @@ -124,6 +124,12 @@ SECTIONS ASSERT(. - _entry_trampoline == PAGE_SIZE, "entry trampoline is too big"); #endif +#ifdef CONFIG_RETPOLINE + __indirect_thunk_start = .; + *(.text.__x86.indirect_thunk) + __indirect_thunk_end = .; +#endif + /* End of text section */ _etext = .; } :text = 0x9090 |