xptcstubs_asm_sparc64_openbsd.s

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/* -*- Mode: asm; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

        .global SharedStub

/*

    in the frame for the function that called SharedStub are the

    rest of the parameters we need

*/

SharedStub:

! we don't create a new frame yet, but work within the frame of the calling

! function to give ourselves the other parameters we want

        mov     %o0, %o1               ! shuffle the index up to 2nd place

        mov     %i0, %o0               ! the original 'this'

        add     %fp, 0x7ff + 136, %o2  ! previous stack top adjusted to the first argument slot (beyond 'this')

! save off the original incoming parameters that arrived in

! registers, the ABI guarantees the space for us to do this

        stx     %i1, [%fp + 0x7ff + 136]

        stx     %i2, [%fp + 0x7ff + 144]

        stx     %i3, [%fp + 0x7ff + 152]

        stx     %i4, [%fp + 0x7ff + 160]

        stx     %i5, [%fp + 0x7ff + 168]

! now we can build our own stack frame

        save    %sp,-(128 + 64),%sp    ! room for the register window and

                                       ! struct pointer, rounded up to 0 % 64

! our function now appears to have been called

! as SharedStub(nsISupports* that, uint32_t index, uint32_t* args)

! so we can just copy these through

        mov     %i0, %o0

        mov     %i1, %o1

        mov     %i2, %o2

        call    PrepareAndDispatch

nop

        mov     %o0,%i0             ! propagate return value

        b .LL1

nop

.LL1:

ret

        restore

       .size    SharedStub, .-SharedStub

       .type    SharedStub, #function