problem about the tool chain for R3000

["guo guo" <sunnyboyguo@gmail.com>]

Dear All,

I'm trying to build tool chain with gcc4.2, binutils2.17 and glibc2.5
for mips r3000 chip.
During configure gcc I add ?Cmabi=32 ?Cmarch=r3000 ?Cmtune=r3000. and
during building glibc, I add CFLAGS= -O2 ?Cmabi=32 ?Cmarch=r3000
?Cmtune=r3000,
Then I dissembled the libc-2.5.90.so to check the instructions. I
found 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 more
resource.
Can it avoid there two instructions by special configuration or patch?

Best regards,
Tony