55 lines
1.9 KiB
C++
55 lines
1.9 KiB
C++
|
/* ScummVM - Graphic Adventure Engine
|
||
|
|
*
|
||
|
|
* ScummVM is the legal property of its developers, whose names
|
||
|
|
* are too numerous to list here. Please refer to the COPYRIGHT
|
||
|
|
* file distributed with this source distribution.
|
||
|
|
*
|
||
|
|
* 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 3 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, see <http://www.gnu.org/licenses/>.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "common/scummsys.h"
|
||
|
|
|
||
|
|
#ifdef USE_ELF_LOADER
|
||
|
|
|
||
|
|
/**
|
||
|
|
* These functions are a hack to workaround a GCC limitation
|
||
|
|
* At every function entry, GCC adds a check on the stack size
|
||
|
|
* If the stack is too small, the functions _rt_stkovf_split_small or _rt_stkovf_split_big are called
|
||
|
|
* This call is done using a PC relative 24 bits address but we want to link back to main executable functions
|
||
|
|
* and this is not possible using this relocation type.
|
||
|
|
* So we create wrapper functions which will just jump to the main function using a 32 bits relocation.
|
||
|
|
* The wrapping is done by ld thanks to its --wrap argument
|
||
|
|
*/
|
||
|
|
|
||
|
|
__asm__ (
|
||
|
|
".global __wrap___rt_stkovf_split_small\n"
|
||
|
|
".type __wrap___rt_stkovf_split_small, %function\n"
|
||
|
|
"__wrap___rt_stkovf_split_small:\n"
|
||
|
|
"LDR pc, .Lsmall\n"
|
||
|
|
".Lsmall:\n"
|
||
|
|
".word __real___rt_stkovf_split_small\n"
|
||
|
|
);
|
||
|
|
|
||
|
|
__asm__ (
|
||
|
|
".global __wrap___rt_stkovf_split_big\n"
|
||
|
|
".type __wrap___rt_stkovf_split_big, %function\n"
|
||
|
|
"__wrap___rt_stkovf_split_big:\n"
|
||
|
|
"LDR pc, .Lbig\n"
|
||
|
|
".Lbig:\n"
|
||
|
|
".word __real___rt_stkovf_split_big\n"
|
||
|
|
);
|
||
|
|
|
||
|
|
#endif
|