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        comment "subroutine prologue"
        .macro gdbasm_enter
        push    %ebp
        mov     %esp,%ebp
        .endm

        comment "subroutine epilogue"
        .macro gdbasm_leave
        pop     %ebp
        ret
        .endm

        .macro gdbasm_call subr
        call    \subr
        .endm

        .macro gdbasm_several_nops
        nop
        nop
        nop
        nop
        .endm

        comment "exit (0)"
        .macro gdbasm_exit0
        hlt
        .endm

        comment "crt0 startup"
        .macro gdbasm_startup
        xor     %ebp, %ebp
        .endm

        comment "Declare a data variable"
        .macro gdbasm_datavar name value
        .data
\name:
        .long   \value
        .endm