1*4882a593Smuzhiyun# For the pre-R6 code in arch/mips/vdso/vdso.h for locating 2*4882a593Smuzhiyun# the base address of VDSO, the linker will emit a R_MIPS_PC32 3*4882a593Smuzhiyun# relocation in binutils > 2.25 but it will fail with older versions 4*4882a593Smuzhiyun# because that relocation is not supported for that symbol. As a result 5*4882a593Smuzhiyun# of which we are forced to disable the VDSO symbols when building 6*4882a593Smuzhiyun# with < 2.25 binutils on pre-R6 kernels. For more references on why we 7*4882a593Smuzhiyun# can't use other methods to get the base address of VDSO please refer to 8*4882a593Smuzhiyun# the comments on that file. 9*4882a593Smuzhiyun# 10*4882a593Smuzhiyun# GCC (at least up to version 9.2) appears to emit function calls that make use 11*4882a593Smuzhiyun# of the GOT when targeting microMIPS, which we can't use in the VDSO due to 12*4882a593Smuzhiyun# the lack of relocations. As such, we disable the VDSO for microMIPS builds. 13*4882a593Smuzhiyun 14*4882a593Smuzhiyunconfig MIPS_LD_CAN_LINK_VDSO 15*4882a593Smuzhiyun def_bool LD_VERSION >= 225000000 || LD_IS_LLD 16*4882a593Smuzhiyun 17*4882a593Smuzhiyunconfig MIPS_DISABLE_VDSO 18*4882a593Smuzhiyun def_bool CPU_MICROMIPS || (!CPU_MIPSR6 && !MIPS_LD_CAN_LINK_VDSO) 19