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Subject[PATCH v2 08/14] x86/retpoline: Create a retpoline thunk array
Stick all the retpolines in a single symbol and have the individual
thunks as inner labels, this should guarantee thunk order and layout.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
arch/x86/lib/retpoline.S | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)

--- a/arch/x86/lib/retpoline.S
+++ b/arch/x86/lib/retpoline.S
@@ -30,7 +30,7 @@

.align 32

-SYM_FUNC_START(__x86_indirect_thunk_\reg)
+SYM_INNER_LABEL(__x86_indirect_thunk_\reg, SYM_L_GLOBAL)

ALTERNATIVE_2 __stringify(ANNOTATE_RETPOLINE_SAFE; jmp *%\reg), \
__stringify(RETPOLINE \reg), X86_FEATURE_RETPOLINE, \
@@ -55,10 +55,16 @@ SYM_FUNC_END(__x86_indirect_thunk_\reg)
#define __EXPORT_THUNK(sym) _ASM_NOKPROBE(sym); EXPORT_SYMBOL(sym)
#define EXPORT_THUNK(reg) __EXPORT_THUNK(__x86_indirect_thunk_ ## reg)

+ .align 32
+SYM_CODE_START(__x86_indirect_thunk_array)
+
#define GEN(reg) THUNK reg
#include <asm/GEN-for-each-reg.h>
#undef GEN

+ .align 32
+SYM_CODE_END(__x86_indirect_thunk_array)
+
#define GEN(reg) EXPORT_THUNK(reg)
#include <asm/GEN-for-each-reg.h>
#undef GEN

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