System call select on R4600

["Macleod" <macleod@mail2000.com.tw>]

 My problem is "select" system call always return -1
 and errno is -4142, but sys_select has never been called.
 Think, it has some problem on handling system call. 
 Because if I change SYS(sys_select, 5) to 4 arguments,
 sys_select will be executed. 
 Thanks!

 Compiler: gcc-3.3.3
 Kernel: mips-linux-2.4.25/mips-linux-2.4.26
 Compile parameter:
 -Wno-inline \
 -Werror-implicit-function-declarations \
 -fno-PIC \
 -fno-common \
 -mno-abicalls \
 -mlong-calls \
 -march=r4600 \
 -mtune=r4600 \
 -G 0 \
 -Wa,--trap