When using lld to link MIPS kernel, the following warning is triggered:
arch/mips/vdso/Makefile:62: MIPS VDSO requires binutils >= 2.25
With with this segment removed, VDSO is built:
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# |
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# For the pre-R6 code in arch/mips/vdso/vdso.h for locating |
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# the base address of VDSO, the linker will emit a R_MIPS_PC32 |
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# relocation in binutils > 2.25 but it will fail with older versions |
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# because that relocation is not supported for that symbol. As a result |
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# of which we are forced to disable the VDSO symbols when building |
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# with < 2.25 binutils on pre-R6 kernels. For more references on why we |
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# can't use other methods to get the base address of VDSO please refer to |
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# the comments on that file. |
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# |
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ifndef CONFIG_CPU_MIPSR6 |
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ifeq ($(call ld-ifversion, -lt, 225000000, y),y) |
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$(warning MIPS VDSO requires binutils >= 2.25) |
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obj-vdso-y := $(filter-out vgettimeofday.o, $(obj-vdso-y)) |
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ccflags-vdso += -DDISABLE_MIPS_VDSO |
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endif |
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endif |
R_MIPS_PC32 relocation is supported by LLD: https://reviews.llvm.org/rLLD259782.
