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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Glen Nakamura <glen@imodulo.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/* Platform specific code to invoke XPCOM methods on native objects */
#include "xptcprivate.h"
/* Prototype specifies unmangled function name and disables unused warning */
static void
invoke_copy_to_stack(PRUint64* d, PRUint32 paramCount, nsXPTCVariant* s)
__asm__("invoke_copy_to_stack") __attribute__((unused));
static void
invoke_copy_to_stack(PRUint64* d, PRUint32 paramCount, nsXPTCVariant* s)
{
const PRUint8 NUM_ARG_REGS = 6-1; // -1 for "this" pointer
for(PRUint32 i = 0; i < paramCount; i++, d++, s++)
{
if(s->IsPtrData())
{
*d = (PRUint64)s->ptr;
continue;
}
switch(s->type)
{
case nsXPTType::T_I8 : *d = (PRUint64)s->val.i8; break;
case nsXPTType::T_I16 : *d = (PRUint64)s->val.i16; break;
case nsXPTType::T_I32 : *d = (PRUint64)s->val.i32; break;
case nsXPTType::T_I64 : *d = (PRUint64)s->val.i64; break;
case nsXPTType::T_U8 : *d = (PRUint64)s->val.u8; break;
case nsXPTType::T_U16 : *d = (PRUint64)s->val.u16; break;
case nsXPTType::T_U32 : *d = (PRUint64)s->val.u32; break;
case nsXPTType::T_U64 : *d = (PRUint64)s->val.u64; break;
case nsXPTType::T_FLOAT :
if(i < NUM_ARG_REGS)
{
// convert floats to doubles if they are to be passed
// via registers so we can just deal with doubles later
union { PRUint64 u64; double d; } t;
t.d = (double)s->val.f;
*d = t.u64;
}
else
// otherwise copy to stack normally
*d = (PRUint64)s->val.u32;
break;
case nsXPTType::T_DOUBLE : *d = (PRUint64)s->val.u64; break;
case nsXPTType::T_BOOL : *d = (PRUint64)s->val.b; break;
case nsXPTType::T_CHAR : *d = (PRUint64)s->val.c; break;
case nsXPTType::T_WCHAR : *d = (PRUint64)s->val.wc; break;
default:
// all the others are plain pointer types
*d = (PRUint64)s->val.p;
break;
}
}
}
/*
* XPTC_PUBLIC_API(nsresult)
* XPTC_InvokeByIndex(nsISupports* that, PRUint32 methodIndex,
* PRUint32 paramCount, nsXPTCVariant* params)
*/
__asm__(
"#### XPTC_InvokeByIndex ####\n"
".text\n\t"
".align 5\n\t"
".globl XPTC_InvokeByIndex\n\t"
".ent XPTC_InvokeByIndex\n"
"XPTC_InvokeByIndex:\n\t"
".frame $15,32,$26,0\n\t"
".mask 0x4008000,-32\n\t"
"ldgp $29,0($27)\n"
"$XPTC_InvokeByIndex..ng:\n\t"
"subq $30,32,$30\n\t"
"stq $26,0($30)\n\t"
"stq $15,8($30)\n\t"
"bis $30,$30,$15\n\t"
".prologue 1\n\t"
/*
* Allocate enough stack space to hold the greater of 6 or "paramCount"+1
* parameters. (+1 for "this" pointer) Room for at least 6 parameters
* is required for storage of those passed via registers.
*/
"bis $31,5,$2\n\t" /* count = MAX(5, "paramCount") */
"cmplt $2,$18,$1\n\t"
"cmovne $1,$18,$2\n\t"
"s8addq $2,16,$1\n\t" /* room for count+1 params (8 bytes each) */
"bic $1,15,$1\n\t" /* stack space is rounded up to 0 % 16 */
"subq $30,$1,$30\n\t"
"stq $16,0($30)\n\t" /* save "that" (as "this" pointer) */
"stq $17,16($15)\n\t" /* save "methodIndex" */
"addq $30,8,$16\n\t" /* pass stack pointer */
"bis $18,$18,$17\n\t" /* pass "paramCount" */
"bis $19,$19,$18\n\t" /* pass "params" */
"bsr $26,$invoke_copy_to_stack..ng\n\t" /* call invoke_copy_to_stack */
/*
* Copy the first 6 parameters to registers and remove from stack frame.
* Both the integer and floating point registers are set for each parameter
* except the first which is the "this" pointer. (integer only)
* The floating point registers are all set as doubles since the
* invoke_copy_to_stack function should have converted the floats.
*/
"ldq $16,0($30)\n\t" /* integer registers */
"ldq $17,8($30)\n\t"
"ldq $18,16($30)\n\t"
"ldq $19,24($30)\n\t"
"ldq $20,32($30)\n\t"
"ldq $21,40($30)\n\t"
"ldt $f17,8($30)\n\t" /* floating point registers */
"ldt $f18,16($30)\n\t"
"ldt $f19,24($30)\n\t"
"ldt $f20,32($30)\n\t"
"ldt $f21,40($30)\n\t"
"addq $30,48,$30\n\t" /* remove params from stack */
/*
* Call the virtual function with the constructed stack frame.
*/
"bis $16,$16,$1\n\t" /* load "this" */
"ldq $2,16($15)\n\t" /* load "methodIndex" */
"ldq $1,0($1)\n\t" /* load vtable */
#if defined(__GXX_ABI_VERSION) && __GXX_ABI_VERSION >= 100 /* G++ V3 ABI */
"s8addq $2,$31,$2\n\t" /* vtable index = "methodIndex" * 8 */
#else /* not G++ V3 ABI */
"s8addq $2,16,$2\n\t" /* vtable index = "methodIndex" * 8 + 16 */
#endif /* G++ V3 ABI */
"addq $1,$2,$1\n\t"
"ldq $27,0($1)\n\t" /* load address of function */
"jsr $26,($27),0\n\t" /* call virtual function */
"ldgp $29,0($26)\n\t"
"bis $15,$15,$30\n\t"
"ldq $26,0($30)\n\t"
"ldq $15,8($30)\n\t"
"addq $30,32,$30\n\t"
"ret $31,($26),1\n\t"
".end XPTC_InvokeByIndex"
);
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