mirror of
https://github.com/scummvm/scummvm.git
synced 2026-05-21 05:40:43 +00:00
Miro Kropacek
88 lines
2.9 KiB
C++
88 lines
2.9 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 modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (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, see <http://www.gnu.org/licenses/>.
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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(__MINT__) && defined(__ELF__) && !defined(__mcoldfire__)
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#include "backends/plugins/atari/atari-provider.h"
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#include "backends/plugins/elf/m68k-loader.h"
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#include <mint/cookie.h>
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#include <mint/mintbind.h>
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#include <mint/ssystem.h>
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class AtariDLObject final : public M68KDLObject {
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protected:
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void relocateSymbols(ptrdiff_t offset) override {
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// Symbols imported via `ld --just-symbols=$(EXECUTABLE)` (used by the
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// plugin link step to resolve references into the main binary) end up as
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// SHN_ABS with st_value = ELF VMA in the main binary. The atariprg loader
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// loads the main binary at _base->p_tbase, so the runtime address is
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// (ELF VMA + p_tbase). Patch SHN_ABS entries here; the base implementation
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// then handles plugin-local symbols.
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const uint32 mainOffset = (uint32)_base->p_tbase;
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Elf32_Sym *s = _symtab;
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for (uint32 c = _symbol_cnt; c--; s++) {
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if (s->st_shndx == SHN_ABS)
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s->st_value += mainOffset;
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}
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DLObject::relocateSymbols(offset);
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}
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void flushDataCache(void *ptr, uint32 len) const override {
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if (Ssystem(-1, 0L, 0L) == 0) {
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Ssystem(S_FLUSHCACHE, (long)ptr, (long)len);
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} else {
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long mcpu = 0;
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if (Getcookie(C__CPU, &mcpu) == C_FOUND) {
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if (mcpu >= 40) {
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long oldssp = Super(SUP_SET);
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__asm__ volatile (
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".word 0xF478\n\t" // cpusha dc
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".word 0xF498" // cinva ic
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::: "memory"
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);
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Super((void *)oldssp);
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} else if (mcpu >= 20) {
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long oldssp = Super(SUP_SET);
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__asm__ volatile (
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"movec %%cacr,%%d0\n\t"
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"or.w #0x0008,%%d0\n\t" // CI
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"movec %%d0,%%cacr"
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::: "d0", "cc", "memory"
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);
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Super((void *)oldssp);
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}
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}
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}
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}
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};
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Plugin *AtariPluginProvider::createPlugin(const Common::FSNode &node) const {
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return new TemplatedELFPlugin<AtariDLObject>(node.getPath());
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}
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#endif // defined(DYNAMIC_MODULES) && defined(__MINT__) && defined(__ELF__) && !defined(__mcoldfire__)
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