2022-03-08 17:52:57 +01:00
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From: Aurelien Jarno <aurelien@aurel32.net>
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Date: Fri, 28 Jan 2022 18:33:46 +0100
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Subject: Makefile: fix build with binutils 2.38
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Git-commit: 5d53b55aa77ffeefd4012445dfa6ad3535e1ff2c
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From version 2.38, binutils default to ISA spec version 20191213. This
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means that the csr read/write (csrr*/csrw*) instructions and fence.i
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instruction has separated from the `I` extension, become two standalone
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extensions: Zicsr and Zifencei. As the kernel uses those instruction,
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this causes the following build failure:
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CC lib/sbi/sbi_tlb.o
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<<BUILDDIR>>/lib/sbi/sbi_tlb.c: Assembler messages:
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<<BUILDDIR>>/lib/sbi/sbi_tlb.c:190: Error: unrecognized opcode `fence.i'
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make: *** [Makefile:431: <<BUILDDIR>>/build/lib/sbi/sbi_tlb.o] Error 1
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The fix is to specify those extensions explicitly in -march. However as
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older binutils version do not support this, we first need to detect
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that.
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Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
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Tested-by: Alexandre Ghiti <alexandre.ghiti@canonical.com>
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Reviewed-by: Anup Patel <anup@brainfault.org>
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Signed-off-by: Dario Faggioli <dfaggioli@suse.com>
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---
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Makefile | 9 ++++++++-
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1 file changed, 8 insertions(+), 1 deletion(-)
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diff --git a/roms/opensbi/Makefile b/roms/opensbi/Makefile
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2022-07-22 13:50:51 +02:00
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index 062883e9695fb4447d2e61d7f282..fc1ea13e519a702e8b09d9006a2c 100644
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2022-03-08 17:52:57 +01:00
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--- a/roms/opensbi/Makefile
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+++ b/roms/opensbi/Makefile
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2022-07-22 13:50:51 +02:00
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@@ -153,6 +153,9 @@ OPENSBI_LD_PIE := $(shell $(CC) $(CLANG_TARGET) $(RELAX_FLAG) $(USE_LD_FLAG) -fP
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# Check whether the compiler supports -m(no-)save-restore
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CC_SUPPORT_SAVE_RESTORE := $(shell $(CC) $(CLANG_TARGET) $(RELAX_FLAG) -nostdlib -mno-save-restore -x c /dev/null -o /dev/null 2>&1 | grep "\-save\-restore" >/dev/null && echo n || echo y)
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2022-03-08 17:52:57 +01:00
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+# Check whether the assembler and the compiler support the Zicsr and Zifencei extensions
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+CC_SUPPORT_ZICSR_ZIFENCEI := $(shell $(CC) $(CLANG_TARGET) $(RELAX_FLAG) -nostdlib -march=rv$(OPENSBI_CC_XLEN)imafd_zicsr_zifencei -x c /dev/null -o /dev/null 2>&1 | grep "zicsr\|zifencei" > /dev/null && echo n || echo y)
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+
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2022-07-22 13:50:51 +02:00
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# Build Info:
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# OPENSBI_BUILD_TIME_STAMP -- the compilation time stamp
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# OPENSBI_BUILD_COMPILER_VERSION -- the compiler version info
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@@ -223,7 +226,11 @@ ifndef PLATFORM_RISCV_ABI
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2022-03-08 17:52:57 +01:00
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endif
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ifndef PLATFORM_RISCV_ISA
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ifneq ($(PLATFORM_RISCV_TOOLCHAIN_DEFAULT), 1)
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- PLATFORM_RISCV_ISA = rv$(PLATFORM_RISCV_XLEN)imafdc
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+ ifeq ($(CC_SUPPORT_ZICSR_ZIFENCEI), y)
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+ PLATFORM_RISCV_ISA = rv$(PLATFORM_RISCV_XLEN)imafdc_zicsr_zifencei
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+ else
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+ PLATFORM_RISCV_ISA = rv$(PLATFORM_RISCV_XLEN)imafdc
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+ endif
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else
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PLATFORM_RISCV_ISA = $(OPENSBI_CC_ISA)
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endif
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