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55db1210eb
Setting the base address for the plugin elf files high in memory forces the linker to generate veneers to turn relative jumps to the main binary into absolute jumps. This removes the need to allocate the plugins near the the main binary in the program address space. This also removes the need to handle the R_ARM_CALL and R_ARM_JUMP24 relocation types. Fixes #11555.
74 lines
2.4 KiB
C++
74 lines
2.4 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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*
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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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*
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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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*/
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#define FORBIDDEN_SYMBOL_ALLOW_ALL
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#include "common/scummsys.h"
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#if defined(DYNAMIC_MODULES) && defined(__3DS__)
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#include "backends/plugins/3ds/3ds-provider.h"
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#include "backends/plugins/elf/arm-loader.h"
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#include "common/debug.h"
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#include <3ds.h>
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extern uint32 __end__; // End of the main program in memory. Set by the linker.
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static uint32 alignUp(uint32 ptr, uint32 align) {
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return (ptr + align - 1) & ~(align - 1);
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}
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class CTRDLObject : public ARMDLObject {
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protected:
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static const uint32 kPageSize = 0x1000;
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uint32 _segmentHeapAddress;
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void flushDataCache(void *ptr, uint32 len) const override {
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svcFlushProcessDataCache(CUR_PROCESS_HANDLE, (uint32)ptr, len);
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}
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void protectMemory(void *ptr, uint32 len, int prot) const override {
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debug(2, "elfloader: Protecting memory at %p, len %d with %d", ptr, len, prot);
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uint32 ctrFlags = 0;
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if (prot & PF_R) ctrFlags |= MEMPERM_READ;
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if (prot & PF_W) ctrFlags |= MEMPERM_WRITE;
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if (prot & PF_X) ctrFlags |= MEMPERM_EXECUTE;
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// The kernel expects the range to be aligned to page boundaries
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len = alignUp(len, kPageSize);
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Handle currentHandle;
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svcDuplicateHandle(¤tHandle, CUR_PROCESS_HANDLE);
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svcControlProcessMemory(currentHandle, (uint32)ptr, 0, len, MEMOP_PROT, ctrFlags);
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svcCloseHandle(currentHandle);
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}
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};
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Plugin *CTRPluginProvider::createPlugin(const Common::FSNode &node) const {
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return new TemplatedELFPlugin<CTRDLObject>(node.getPath());
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}
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#endif // defined(DYNAMIC_MODULES) && defined(__3DS__)
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