/* -*- 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
*
* 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) 1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Russell King <rmk@arm.linux.org.uk>
*
* 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 ***** */
/* Implement shared vtbl methods. */
#include "xptcprivate.h"
#error "This code is for Linux ARM only. Please check if it works for you, too.\nDepends strongly on gcc behaviour."
#endif
/* Specify explicitly a symbol for this function, don't try to guess the c++ mangled symbol. */
static nsresult PrepareAndDispatch(nsXPTCStubBase* self, uint32 methodIndex, PRUint32* args) asm("_PrepareAndDispatch");
static nsresult
{
PRUint8 i;
// setup variant array pointer
if(paramCount > PARAM_BUFFER_COUNT)
else
for(i = 0; i < paramCount; i++, ap++)
{
{
continue;
}
// else
switch(type)
{
default:
NS_ASSERTION(0, "bad type");
break;
}
}
if(dispatchParams != paramBuffer)
delete [] dispatchParams;
return result;
}
/*
* This is our shared stub.
*
* r0 = Self.
*
* The Rules:
* We pass an (undefined) number of arguments into this function.
* The first 3 C++ arguments are in r1 - r3, the rest are built
* by the calling function on the stack.
*
* We are allowed to corrupt r0 - r3, ip, and lr.
*
* Other Info:
* We pass the stub number in using `ip'.
*
* Implementation:
* - We save r1 to r3 inclusive onto the stack, which will be
* immediately below the caller saved arguments.
* - setup r2 (PrepareAndDispatch's args pointer) to point at
* the base of all these arguments
* - Save LR (for the return address)
* - Set r1 (PrepareAndDispatch's methodindex argument) from ip
* - r0 is passed through (self)
* - Call PrepareAndDispatch
* - When the call returns, we return by loading the PC off the
* stack, and undoing the stack (one instruction)!
*
*/
__asm__ ("\n\
SharedStub: \n\
stmfd sp!, {r1, r2, r3} \n\
mov r2, sp \n\
str lr, [sp, #-4]! \n\
mov r1, ip \n\
bl _PrepareAndDispatch \n\
ldr pc, [sp], #16");
/*
* Create sets of stubs to call the SharedStub.
* We don't touch the stack here, nor any registers, other than IP.
* IP is defined to be corruptable by a called function, so we are
* safe to use it.
*
* This will work with or without optimisation.
*/
/*
* Note : As G++3 ABI contains the length of the functionname in the
* mangled name, it is difficult to get a generic assembler mechanism like
* in the G++ 2.95 case.
* Create names would be like :
* _ZN14nsXPTCStubBase5Stub9Ev
* _ZN14nsXPTCStubBase6Stub13Ev
* _ZN14nsXPTCStubBase7Stub144Ev
* Use the assembler directives to get the names right...
*/
#define STUB_ENTRY(n) \
__asm__( \
".section \".text\"\n" \
" .align 2\n" \
" .iflt ("#n" - 10)\n" \
" .globl _ZN14nsXPTCStubBase5Stub"#n"Ev\n" \
" .type _ZN14nsXPTCStubBase5Stub"#n"Ev,#function\n" \
"_ZN14nsXPTCStubBase5Stub"#n"Ev:\n" \
" .else\n" \
" .iflt ("#n" - 100)\n" \
" .globl _ZN14nsXPTCStubBase6Stub"#n"Ev\n" \
" .type _ZN14nsXPTCStubBase6Stub"#n"Ev,#function\n" \
"_ZN14nsXPTCStubBase6Stub"#n"Ev:\n" \
" .else\n" \
" .iflt ("#n" - 1000)\n" \
" .globl _ZN14nsXPTCStubBase7Stub"#n"Ev\n" \
" .type _ZN14nsXPTCStubBase7Stub"#n"Ev,#function\n" \
"_ZN14nsXPTCStubBase7Stub"#n"Ev:\n" \
" .else\n" \
" .err \"stub number "#n"> 1000 not yet supported\"\n" \
" .endif\n" \
" .endif\n" \
" .endif\n" \
" mov ip, #"#n"\n" \
" b SharedStub\n\t");
#if 0
/*
* This part is left in as comment : this is how the method definition
* should look like.
*/
#define STUB_ENTRY(n) \
{ \
__asm__ ( \
" mov ip, #"#n"\n" \
" b SharedStub\n\t"); \
return 0; /* avoid warnings */ \
}
#endif
#else /* G++2.95 ABI */
#define STUB_ENTRY(n) \
__asm__( \
".section \".text\"\n" \
" .align\n" \
" .globl Stub"#n"__14nsXPTCStubBase\n" \
" .type Stub"#n"__14nsXPTCStubBase,#function\n\n" \
"Stub"#n"__14nsXPTCStubBase:\n" \
" mov ip, #"#n"\n" \
" b SharedStub\n\t");
#endif
#define SENTINEL_ENTRY(n) \
{ \
NS_ASSERTION(0,"nsXPTCStubBase::Sentinel called"); \
return NS_ERROR_NOT_IMPLEMENTED; \
}
#include "xptcstubsdef.inc"