Dear All, I'm trying to build tool chain with gcc4.2, binutils2.17 and glibc2.5for mips r3000 chip.During configure gcc I add ?mabi=32 ?march=r3000 ?mtune=r3000. andduring building glibc, I add CFLAGS= -O2 ?mabi=32 ?march=r3000?mtune=r3000,Then I dissembled the libc-2.5.90.so to check the instructions. Ifound it has two instructions rdhwr(0x7c03e83b) and sync(0x0000000f)that don't belongs to mips r3000.I see some engineers use kernel to trap rdhwr but it may cost to moreresource.Can it avoid there two instructions by special configuration or patch? Best regards,Tony