Commit 337e4cc8 authored by Borislav Petkov's avatar Borislav Petkov Committed by Ingo Molnar

x86/alternatives: Add an auxilary section

Add .altinstr_aux for additional instructions which will be used
before and/or during patching. All stuff which needs more
sophisticated patching should go there. See next patch.
Signed-off-by: default avatarBorislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1453842730-28463-8-git-send-email-bp@alien8.deSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent a362bf9f
...@@ -195,6 +195,17 @@ SECTIONS ...@@ -195,6 +195,17 @@ SECTIONS
:init :init
#endif #endif
/*
* Section for code used exclusively before alternatives are run. All
* references to such code must be patched out by alternatives, normally
* by using X86_FEATURE_ALWAYS CPU feature bit.
*
* See static_cpu_has() for an example.
*/
.altinstr_aux : AT(ADDR(.altinstr_aux) - LOAD_OFFSET) {
*(.altinstr_aux)
}
INIT_DATA_SECTION(16) INIT_DATA_SECTION(16)
.x86_cpu_dev.init : AT(ADDR(.x86_cpu_dev.init) - LOAD_OFFSET) { .x86_cpu_dev.init : AT(ADDR(.x86_cpu_dev.init) - LOAD_OFFSET) {
......
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