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https://github.com/libretro/scummvm.git
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13b904d282
This merge was extremely difficult to carry out. It wasn't entirely SVN's fault -- there were several merges to the branch that were done by hand. Please check for any issues and regressions. Also note that the DS makefile was not copied over since the "one at a time" plugin mode currently has too much fragmentation ie. it doesn't work. svn-id: r54051
91 lines
3.1 KiB
C++
91 lines
3.1 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#include "common/scummsys.h"
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#if defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER) && defined(MIPS_TARGET)
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#include "backends/plugins/elf/shorts-segment-manager.h"
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#include "common/debug.h"
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#include "common/textconsole.h"
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extern char __plugin_hole_start; // Indicates start of hole in program file for shorts
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extern char __plugin_hole_end; // Indicates end of hole in program file
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extern char _gp[]; // Value of gp register
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DECLARE_SINGLETON(ShortSegmentManager); // For singleton
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ShortSegmentManager::ShortSegmentManager() {
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_shortsStart = &__plugin_hole_start ; //shorts segment begins at the plugin hole we made when linking
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_shortsEnd = &__plugin_hole_end; //and ends at the end of that hole.
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}
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ShortSegmentManager::Segment *ShortSegmentManager::newSegment(uint32 size, char *origAddr) {
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char *lastAddress = origAddr;
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Common::List<Segment *>::iterator i;
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// Find a block that fits, starting from the beginning
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for (i = _list.begin(); i != _list.end(); ++i) {
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char *currAddress = (*i)->getStart();
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if (uint32(currAddress) - uint32(lastAddress) >= size)
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break;
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lastAddress = (*i)->getEnd();
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}
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if ((Elf32_Addr)lastAddress & 3)
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lastAddress += 4 - ((Elf32_Addr)lastAddress & 3); // Round up to multiple of 4
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if (lastAddress + size > _shortsEnd) {
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warning("elfloader: No space in shorts segment for %x bytes. Last address is %p, max address is %p.",
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size, lastAddress, _shortsEnd);
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return 0;
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}
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Segment *seg = new Segment(lastAddress, size, origAddr); // Create a new segment
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if (lastAddress + size > _highestAddress)
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_highestAddress = lastAddress + size; // Keep track of maximum
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_list.insert(i, seg);
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debug(2, "elfloader: Shorts segment size %x allocated. End = %p. Remaining space = %x. Highest so far is %p.",
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size, lastAddress + size, _shortsEnd - _list.back()->getEnd(), _highestAddress);
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return seg;
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}
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void ShortSegmentManager::deleteSegment(ShortSegmentManager::Segment *seg) {
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debug(2, "elfloader: Deleting shorts segment from %p to %p.", seg->getStart(), seg->getEnd());
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_list.remove(seg);
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delete seg;
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}
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#endif // defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER) && defined(MIPS_TARGET)
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