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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 */
#include "xptcprivate.h"
#if !defined(__sparc__)
#error "This code is for Sparc only"
#endif
typedef unsigned nsXPCVariant;
extern "C" uint32_t
invoke_count_words(uint32_t paramCount, nsXPTCVariant* s)
{
uint32_t result = 0;
for(uint32_t i = 0; i < paramCount; i++, s++)
{
if(s->IsPtrData())
{
result++;
continue;
}
switch(s->type)
{
case nsXPTType::T_I8 :
case nsXPTType::T_I16 :
case nsXPTType::T_I32 :
result++;
break;
case nsXPTType::T_I64 :
result+=2;
break;
case nsXPTType::T_U8 :
case nsXPTType::T_U16 :
case nsXPTType::T_U32 :
result++;
break;
case nsXPTType::T_U64 :
result+=2;
break;
case nsXPTType::T_FLOAT :
result++;
break;
case nsXPTType::T_DOUBLE :
result+=2;
break;
case nsXPTType::T_BOOL :
case nsXPTType::T_CHAR :
case nsXPTType::T_WCHAR :
result++;
break;
default:
// all the others are plain pointer types
result++;
break;
}
}
// nuts, I know there's a cooler way of doing this, but it's late
// now and it'll probably come to me in the morning.
if (result & 0x3) result += 4 - (result & 0x3); // ensure q-word alignment
return result;
}
extern "C" uint32_t
invoke_copy_to_stack(uint32_t* d, uint32_t paramCount, nsXPTCVariant* s)
{
/*
We need to copy the parameters for this function to locals and use them
from there since the parameters occupy the same stack space as the stack
we're trying to populate.
*/
uint32_t *l_d = d;
nsXPTCVariant *l_s = s;
uint32_t l_paramCount = paramCount;
uint32_t regCount = 0; // return the number of registers to load from the stack
typedef struct {
uint32_t hi;
uint32_t lo;
} DU; // have to move 64 bit entities as 32 bit halves since
// stack slots are not guaranteed 16 byte aligned
for(uint32_t i = 0; i < l_paramCount; i++, l_d++, l_s++)
{
if (regCount < 5) regCount++;
if(l_s->IsPtrData())
{
if(l_s->type == nsXPTType::T_JSVAL)
{
// On SPARC, we need to pass a pointer to HandleValue
*((void**)l_d) = &l_s->ptr;
} else
{
*((void**)l_d) = l_s->ptr;
}
continue;
}
switch(l_s->type)
{
case nsXPTType::T_I8 : *((int32_t*) l_d) = l_s->val.i8; break;
case nsXPTType::T_I16 : *((int32_t*) l_d) = l_s->val.i16; break;
case nsXPTType::T_I32 : *((int32_t*) l_d) = l_s->val.i32; break;
case nsXPTType::T_I64 :
case nsXPTType::T_U64 :
case nsXPTType::T_DOUBLE : *((uint32_t*) l_d++) = ((DU *)l_s)->hi;
if (regCount < 5) regCount++;
*((uint32_t*) l_d) = ((DU *)l_s)->lo;
break;
case nsXPTType::T_U8 : *((uint32_t*) l_d) = l_s->val.u8; break;
case nsXPTType::T_U16 : *((uint32_t*) l_d) = l_s->val.u16; break;
case nsXPTType::T_U32 : *((uint32_t*) l_d) = l_s->val.u32; break;
case nsXPTType::T_FLOAT : *((float*) l_d) = l_s->val.f; break;
case nsXPTType::T_BOOL : *((uint32_t*) l_d) = l_s->val.b; break;
case nsXPTType::T_CHAR : *((uint32_t*) l_d) = l_s->val.c; break;
case nsXPTType::T_WCHAR : *((int32_t*) l_d) = l_s->val.wc; break;
default:
// all the others are plain pointer types
*((void**)l_d) = l_s->val.p;
break;
}
}
return regCount;
}
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