Subversion Repositories openrisc_2011-10-31

# You'll find a bunch of nop opcodes in the below macros.  They are

# there to keep the code correctly aligned.  Be careful to maintain

# them when changing the code.

        comment "subroutine declare"

        .purgem gdbasm_declare

        .macro gdbasm_declare name

        .align  1

        .global \name

\name:

        .endm

        comment "subroutine prologue"

        .macro gdbasm_enter

        mov.l   r14,@-r15

        sts.l   pr,@-r15

        mov     r15,r14

        nop

        .endm

        comment "subroutine epilogue"

        .macro gdbasm_leave

        mov     r14,r15

        lds.l   @r15+,pr

        mov.l   @r15+,r14

        rts

        nop

        nop

        .endm

        comment "subroutine end"

        .purgem gdbasm_end

        .macro gdbasm_end name

        .size   \name, .-_foo1

        .align  1

        .endm

        comment "subroutine call"

        .macro gdbasm_call subr

        mov.l   .Lconst\@,r1

        bra     .Lafterconst\@

        nop

        nop

.Lconst\@:

        .align  2

        .long   \subr

        .align  1

.Lafterconst\@:

        jsr     @r1

        nop

        .endm

        .macro gdbasm_several_nops

        nop

        nop

        nop

        nop

        .endm

        comment "exit (0)"

        .macro gdbasm_exit0

        sleep

        nop

        .endm

        comment "crt0 startup"

        .macro gdbasm_startup

        mov.l   .stackaddr,r15

        bra     .afterstackaddr

        nop

        nop

        .align 2

.stackaddr:

        .long   196608          ! 0x30000

        .align  1

.afterstackaddr:

        .endm

        comment "Declare a data variable"

        .purgem gdbasm_datavar

        .macro gdbasm_datavar name value

        .data

        .align 2

        .type   \name, @object

        .size   \name, 4

\name:

        .long   \value

        .endm