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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* 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/. */
/* Platform specific code to invoke XPCOM methods on native objects */
.global XPTC_InvokeByIndex
/*
XPTC_InvokeByIndex(nsISupports* that, uint32_t methodIndex,
uint32_t paramCount, nsXPTCVariant* params);
*/
XPTC_InvokeByIndex:
save %sp,-(64 + 16),%sp ! room for the register window and
! struct pointer, rounded up to 0 % 16
mov %i2,%o0 ! paramCount
call invoke_count_words ! returns the required stack size in %o0
mov %i3,%o1 ! params
sll %o0,2,%l0 ! number of bytes
sub %sp,%l0,%sp ! create the additional stack space
mov %sp,%o0 ! pointer for copied args
add %o0,72,%o0 ! step past the register window, the
! struct result pointer and the 'this' slot
mov %i2,%o1 ! paramCount
call invoke_copy_to_stack
mov %i3,%o2 ! params
!
! calculate the target address from the vtable
!
add %i1,1,%i1 ! vTable is zero-based, index is 1 based (?)
ld [%i0],%l1 ! *that --> vTable
sll %i1,3,%i1
add %i1,%l1,%l1 ! vTable[index * 8], l1 now points to vTable entry
lduh [%l1],%l0 ! this adjustor
sll %l0,16,%l0 ! sign extend to 32 bits
sra %l0,16,%l0
add %l0,%i0,%i0 ! adjust this
ld [%l1 + 4],%l0 ! target address
.L5: ld [%sp + 88],%o5
.L4: ld [%sp + 84],%o4
.L3: ld [%sp + 80],%o3
.L2: ld [%sp + 76],%o2
.L1: ld [%sp + 72],%o1
.L0:
jmpl %l0,%o7 ! call the routine
! always have a 'this', from the incoming 'that'
mov %i0,%o0
mov %o0,%i0 ! propagate return value
ret
restore
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