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/* ScummVM - Scumm Interpreter
* Copyright (C) 2001 Ludvig Strigeus
* Copyright (C) 2001-2006 The ScummVM project
* Copyright (C) 2002-2006 Chris Apers - PalmOS Backend
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#ifdef COMPILE_ZODIAC
#include <TapWave.h>
#ifndef __PALMOS_ARMLET__
#error "__PALMOS_ARMLET__ is not defined!!!"
#endif
#ifdef __cplusplus
extern "C" {
#endif
/*
* This variable holds the Tapwave Native Application interface
* dispatch table. General ARM API calls will go through this table.
*/
struct TwGlue* twGlue;
const void* twEmulState;
Call68KFuncType* twCall68KFunc;
#ifdef __MWERKS__
#if __PALMOS_ARMLET__ < 0x120
#error "You must use CodeWarrior for Palm OS 9.3 or later!!!"
#endif
UInt32 __ARMlet_Startup__(const void*, void*, Call68KFuncType*);
/*
* These symbols aren't real, but are linker-generated symbols that
* mark the start and end of the various data sections.
*/
extern long __DataStart__[];
extern long __RODataStart__[];
extern long __BSSStart__[];
extern long __BSSEnd__[];
extern long __CodeRelocStart__[];
extern long __CodeRelocEnd__[];
extern long __DataRelocStart__[];
extern long __DataRelocEnd__[];
/*
* This function performs relocation for Tapwave Native Application.
*/
static void relocate(void)
{
// this symbol points to the very beginning of current application
long base = (long) __ARMlet_Startup__;
long *cur, *end;
// handle code-to-data relocation
cur = __CodeRelocStart__;
end = __CodeRelocEnd__;
for (; cur < end; cur++) {
*(long*)(base + *cur) += base;
}
// handle data-to-data relocation
cur = __DataRelocStart__;
end = __DataRelocEnd__;
for (; cur < end; cur++) {
*(long*)(base + *cur) += base;
}
}
/*
* The following functions provide malloc/free support to Metrowerks
* Standard Library (MSL). This feature requires the MSL library be
* built with _MSL_OS_DIRECT_MALLOC enabled.
*/
void*
__sys_alloc(size_t size)
{
void * ptr = MemPtrNew(size);
ErrFatalDisplayIf(ptr == NULL, "out of memory");
return ptr;
}
void
__sys_free(void* ptr)
{
(void) MemPtrFree(ptr);
}
size_t
__sys_pointer_size(void* ptr)
{
return (size_t) MemPtrSize(ptr);
}
/*
* This is the real entrypoint for Tapwave Native Application. It
* depends on various CodeWarrior 9.2 compiler/linker/runtime features.
*/
static SYSTEM_CALLBACK UInt32
Startup(const void *emulStateP, void *userData68KP, Call68KFuncType *call68KFuncP)
{
if (emulStateP) {
twEmulState = emulStateP;
twCall68KFunc = call68KFuncP;
// COMMENT: normal pace native object launch
return PilotMain(sysAppLaunchCmdNormalLaunch, userData68KP, 0);
} else {
// Setup TNA interface dispatch table
twGlue = (struct TwGlue*) userData68KP;
// OPTIONAL: relocate data segment
relocate();
// OPTIONAL: initialize the floating-point library
// _fp_init();
return 0;
}
}
#pragma PIC off
asm UInt32
__ARMlet_Startup__(const void *emulStateP, void *userData68KP, Call68KFuncType *call68KFuncP)
{
b Startup // 0 forwarding call
nop // 4
nop // 8
nop // 12
nop // 16
nop // 20
nop // 24
dcd 'TWNA' // 28 Tapwave Native Application
dcd 1 // 32 version 1
dcd 'cdwr' // 36 make this section the same as the __ARMlet_Startup__
dcd __DataStart__ // 40 used by CodeWarrior 9.2
dcd __RODataStart__ // 44
dcd __BSSStart__ // 48
dcd __BSSEnd__ // 52
dcd __CodeRelocStart__ // 56
dcd __CodeRelocEnd__ // 60
dcd __DataRelocStart__ // 64
dcd __DataRelocEnd__ // 68
}
#pragma PIC reset
#endif // __MWERKS__
#ifdef __cplusplus
} // extern "C"
#endif
#endif
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