michael@0: /* -*- Mode: asm; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
michael@0:  *
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0:         .global SharedStub
michael@0: 
michael@0: /*
michael@0:     in the frame for the function that called SharedStub are the
michael@0:     rest of the parameters we need
michael@0: 
michael@0: */
michael@0: 
michael@0: SharedStub:
michael@0: ! we don't create a new frame yet, but work within the frame of the calling
michael@0: ! function to give ourselves the other parameters we want
michael@0: 
michael@0:         mov     %o0, %o1               ! shuffle the index up to 2nd place
michael@0:         mov     %i0, %o0               ! the original 'this'
michael@0:         add     %fp, 0x7ff + 136, %o2  ! previous stack top adjusted to the first argument slot (beyond 'this')
michael@0: 
michael@0: ! save off the original incoming parameters that arrived in 
michael@0: ! registers, the ABI guarantees the space for us to do this
michael@0:         stx     %i1, [%fp + 0x7ff + 136]
michael@0:         stx     %i2, [%fp + 0x7ff + 144]
michael@0:         stx     %i3, [%fp + 0x7ff + 152]
michael@0:         stx     %i4, [%fp + 0x7ff + 160]
michael@0:         stx     %i5, [%fp + 0x7ff + 168]
michael@0: ! now we can build our own stack frame
michael@0:         save    %sp,-(128 + 64),%sp    ! room for the register window and
michael@0:                                        ! struct pointer, rounded up to 0 % 64
michael@0: ! our function now appears to have been called
michael@0: ! as SharedStub(nsISupports* that, uint32_t index, uint32_t* args)
michael@0: ! so we can just copy these through
michael@0: 
michael@0:         mov     %i0, %o0
michael@0:         mov     %i1, %o1
michael@0:         mov     %i2, %o2
michael@0:         call    PrepareAndDispatch
michael@0:         nop
michael@0:         mov     %o0,%i0             ! propagate return value
michael@0:         b .LL1
michael@0:         nop
michael@0: .LL1:
michael@0:         ret
michael@0:         restore
michael@0: 
michael@0:        .size    SharedStub, .-SharedStub
michael@0:        .type    SharedStub, #function