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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/. */
/*
Platform specific code to invoke XPCOM methods on native objects
for sparcv9 Solaris.
See the SPARC Compliance Definition (SCD) Chapter 3
for more information about what is going on here, including
the use of BIAS (0x7ff).
The SCD is available from http://www.sparc.com/.
*/
.global NS_InvokeByIndex
.type NS_InvokeByIndex, #function
/*
NS_InvokeByIndex(nsISupports* that, uint32_t methodIndex,
uint32_t paramCount, nsXPTCVariant* params);
*/
NS_InvokeByIndex:
save %sp,-(128 + 64),%sp ! room for the register window and
! struct pointer, rounded up to 0 % 64
sll %i2,4,%l0 ! assume the worst case
! paramCount * 2 * 8 bytes
cmp %l0, 0 ! are there any args? If not,
be .invoke ! no need to copy args to stack
sub %sp,%l0,%sp ! create the additional stack space
add %sp,0x7ff+136,%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
!
! load arguments from stack into the outgoing registers
! BIAS is 0x7ff (2047)
!
! load the %o1..5 64bit (extended word) output registers registers
ldx [%sp + 0x7ff + 136],%o1 ! %i1
ldx [%sp + 0x7ff + 144],%o2 ! %i2
ldx [%sp + 0x7ff + 152],%o3 ! %i3
ldx [%sp + 0x7ff + 160],%o4 ! %i4
ldx [%sp + 0x7ff + 168],%o5 ! %i5
! load the even number double registers starting with %d2
ldd [%sp + 0x7ff + 136],%d2
ldd [%sp + 0x7ff + 144],%d4
ldd [%sp + 0x7ff + 152],%d6
ldd [%sp + 0x7ff + 160],%d8
ldd [%sp + 0x7ff + 168],%d10
ldd [%sp + 0x7ff + 176],%d12
ldd [%sp + 0x7ff + 184],%d14
ldd [%sp + 0x7ff + 192],%d16
ldd [%sp + 0x7ff + 200],%d18
ldd [%sp + 0x7ff + 208],%d20
ldd [%sp + 0x7ff + 216],%d22
ldd [%sp + 0x7ff + 224],%d24
ldd [%sp + 0x7ff + 232],%d26
ldd [%sp + 0x7ff + 240],%d28
ldd [%sp + 0x7ff + 248],%d30
!
! calculate the target address from the vtable
!
.invoke:
sll %i1,3,%l0 ! index *= 8
add %l0,16,%l0 ! there are 2 extra entries in the vTable (16bytes)
ldx [%i0],%l1 ! *that --> address of vtable
ldx [%l0 + %l1],%l0 ! that->vtable[index * 8 + 16] --> address
jmpl %l0,%o7 ! call the routine
mov %i0,%o0 ! move 'this' pointer to out register
mov %o0,%i0 ! propagate return value
ret
restore
.size NS_InvokeByIndex, .-NS_InvokeByIndex
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