rtems/bsps/sh/shsim/console/console-support.S

/*
 *  newlib-1.8.2/newlib/libc/sys/sh/trap.S
 */
        .text
        .global ___trap34
___trap34:
        trapa   #34
        tst     r1,r1   ! r1 is errno
        bt      ret
        mov.l   perrno,r2
        mov.l   r1,@r2
ret:
        rts
        nop

        .align  2
perrno:
        .long   _errno