Cc: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
---
arch/arm/include/asm/common.h | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/arm/include/asm/common.h b/arch/arm/include/asm/common.h
index c32cdfe5ec2f..72ac988cc131 100644
--- a/arch/arm/include/asm/common.h
+++ b/arch/arm/include/asm/common.h
@@ -46,6 +46,12 @@ static inline unsigned long get_sp(void)
return sp;
}
+/*
+ * At least with GCC 7.3.1, listing sp in the clobber register can generate
+ * erroneous accesses to the fp, even in __naked functions. Therefore _always_
+ * branch to a noinline function as soon as possible (usually after relocation
+ * and c_setup).
+ */
static inline void arm_setup_stack(unsigned long top)
{
__asm__ __volatile__("mov sp, %0"
--
2.19.1
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