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- From 0fab2593b436ef1aa87cb272297903a4e0189fd5 Mon Sep 17 00:00:00 2001
- From: "yang.lee" <yang.lee@starfivetech.com>
- Date: Thu, 26 May 2022 11:26:50 +0800
- Subject: [PATCH 3/3] compiler-rt: Use mcr based barrier on armv6
- dsb is an armv7 instruction and wont work when we are building for armv6.
- Rebased By Lee Yang
- Upstream-Status: Pending
- Signed-off-by: Khem Raj <raj.khem@gmail.com>
- ---
- compiler-rt/lib/builtins/assembly.h | 8 ++++++++
- 1 file changed, 8 insertions(+)
- diff --git a/compiler-rt/lib/builtins/assembly.h b/compiler-rt/lib/builtins/assembly.h
- index 69a3d8620f92..60bac86df218 100644
- --- a/compiler-rt/lib/builtins/assembly.h
- +++ b/compiler-rt/lib/builtins/assembly.h
- @@ -189,6 +189,14 @@
- JMP(ip)
- #endif
-
- +#if __ARM_ARCH >= 7
- +#define DMB dmb
- +#elif __ARM_ARCH >= 6
- +#define DMB mcr p15, #0, r0, c7, c10, #5
- +#else
- +#error Only use this with ARMv6+
- +#endif
- +
- #if defined(USE_THUMB_2)
- #define WIDE(op) op.w
- #else
- --
- 2.25.1
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