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This commit is contained in:
Leon Krieg
2026-02-02 04:50:13 +01:00
commit 5b11698731
22592 changed files with 7677434 additions and 0 deletions
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72
backends/plugins/3ds/3ds-provider.cpp Normal file
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/* 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/>.
*
*/
#define FORBIDDEN_SYMBOL_ALLOW_ALL
#include "common/scummsys.h"
#if defined(DYNAMIC_MODULES) && defined(__3DS__)
#include "backends/plugins/3ds/3ds-provider.h"
#include "backends/plugins/elf/arm-loader.h"
#include "common/debug.h"
#include <3ds.h>
extern uint32 __end__; // End of the main program in memory. Set by the linker.
static uint32 alignUp(uint32 ptr, uint32 align) {
return (ptr + align - 1) & ~(align - 1);
}
class CTRDLObject : public ARMDLObject {
protected:
static const uint32 kPageSize = 0x1000;
uint32 _segmentHeapAddress;
void flushDataCache(void *ptr, uint32 len) const override {
svcFlushProcessDataCache(CUR_PROCESS_HANDLE, (uint32)ptr, len);
}
void protectMemory(void *ptr, uint32 len, int prot) const override {
debug(2, "elfloader: Protecting memory at %p, len %d with %d", ptr, len, prot);
uint32 ctrFlags = 0;
if (prot & PF_R) ctrFlags |= MEMPERM_READ;
if (prot & PF_W) ctrFlags |= MEMPERM_WRITE;
if (prot & PF_X) ctrFlags |= MEMPERM_EXECUTE;
// The kernel expects the range to be aligned to page boundaries
len = alignUp(len, kPageSize);
Handle currentHandle;
svcDuplicateHandle(&currentHandle, CUR_PROCESS_HANDLE);
svcControlProcessMemory(currentHandle, (uint32)ptr, 0, len, MEMOP_PROT, ctrFlags);
svcCloseHandle(currentHandle);
}
};
Plugin *CTRPluginProvider::createPlugin(const Common::FSNode &node) const {
return new TemplatedELFPlugin<CTRDLObject>(node.getPath());
}
#endif // defined(DYNAMIC_MODULES) && defined(__3DS__)

36
backends/plugins/3ds/3ds-provider.h Normal file
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/* 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/>.
*
*/
#if defined(DYNAMIC_MODULES) && defined(__3DS__)
#ifndef BACKENDS_PLUGINS_3DS_PROVIDER_H
#define BACKENDS_PLUGINS_3DS_PROVIDER_H
#include "backends/plugins/elf/elf-provider.h"
class CTRPluginProvider : public ELFPluginProvider {
public:
Plugin *createPlugin(const Common::FSNode &node) const;
};
#endif // BACKENDS_PLUGINS_3DS_PROVIDER_H
#endif // defined(DYNAMIC_MODULES) && defined(__3DS__)

182
backends/plugins/3ds/plugin.ld Normal file
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OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
OUTPUT_ARCH(arm)
ENTRY(_start)
PHDRS
{
/* ScummVM's elf loader only allows a single segment, at the moment. */
plugin PT_LOAD FLAGS(7) /* Read | Write | Execute */;
}
SECTIONS
{
/* =========== CODE section =========== */
/* Start the output high in memory so PC-relative jumps from the plugin
to the main binary cannot reach, to force the linker to generate
veneers converting the relative jumps to absolute jumps */
. = 0x8000000;
.text ALIGN(0x1000) :
{
/* .text */
*(.text)
*(.text.*)
*(.glue_7)
*(.glue_7t)
*(.stub)
*(.gnu.warning)
*(.gnu.linkonce.t*)
. = ALIGN(4);
} : plugin
/* =========== RODATA section =========== */
. = ALIGN(0x1000);
.rodata :
{
*(.rodata)
*(.roda)
*(.rodata.*)
*all.rodata*(*)
*(.gnu.linkonce.r*)
SORT(CONSTRUCTORS)
. = ALIGN(4);
} : plugin
.ARM.extab : { *(.ARM.extab* .gnu.linkonce.armextab.*) } : plugin
__exidx_start = .;
ARM.exidx : { *(.ARM.exidx* .gnu.linkonce.armexidx.*) } : plugin
__exidx_end = .;
/* =========== DATA section =========== */
. = ALIGN(0x1000);
.data :
{
*(.data)
*(.data.*)
*(.gnu.linkonce.d*)
CONSTRUCTORS
. = ALIGN(4);
} : plugin
.tdata ALIGN(4) :
{
__tdata_lma = .;
*(.tdata)
*(.tdata.*)
*(.gnu.linkonce.td.*)
. = ALIGN(4);
__tdata_lma_end = .;
} : plugin
.tbss ALIGN(4) :
{
*(.tbss)
*(.tbss.*)
*(.gnu.linkonce.tb.*)
*(.tcommon)
. = ALIGN(4);
} : plugin
.preinit_array ALIGN(4) :
{
PROVIDE (__preinit_array_start = .);
KEEP (*(.preinit_array))
PROVIDE (__preinit_array_end = .);
} : plugin
.init_array ALIGN(4) :
{
PROVIDE (__init_array_start = .);
KEEP (*(SORT(.init_array.*)))
KEEP (*(.init_array))
PROVIDE (__init_array_end = .);
} : plugin
.fini_array ALIGN(4) :
{
PROVIDE (__fini_array_start = .);
KEEP (*(.fini_array))
KEEP (*(SORT(.fini_array.*)))
PROVIDE (__fini_array_end = .);
} : plugin
.ctors ALIGN(4) :
{
___plugin_ctors = .;
KEEP (*(SORT(.ctors.*)))
KEEP (*(.ctors))
___plugin_ctors_end = .;
} : plugin
.dtors ALIGN(4) :
{
___plugin_dtors = .;
KEEP (*(SORT(.dtors.*)))
KEEP (*(.dtors))
___plugin_dtors_end = .;
} : plugin
__bss_start__ = .;
.bss ALIGN(4) :
{
*(.dynbss)
*(.bss)
*(.bss.*)
*(.gnu.linkonce.b*)
*(COMMON)
. = ALIGN(4);
/* Reserve space for the TLS segment of the main thread */
__tls_start = .;
. += + SIZEOF(.tdata) + SIZEOF(.tbss);
__tls_end = .;
} : plugin
__bss_end__ = .;
__end__ = ABSOLUTE(.) ;
/* ==================
==== Metadata ====
================== */
/* Discard sections that difficult post-processing */
/DISCARD/ : { *(.group .comment .note) }
/* Stabs debugging sections. */
.stab 0 : { *(.stab) }
.stabstr 0 : { *(.stabstr) }
.stab.excl 0 : { *(.stab.excl) }
.stab.exclstr 0 : { *(.stab.exclstr) }
.stab.index 0 : { *(.stab.index) }
.stab.indexstr 0 : { *(.stab.indexstr) }
/* DWARF debug sections.
Symbols in the DWARF debugging sections are relative to the beginning
of the section so we begin them at 0. */
/* DWARF 1 */
.debug 0 : { *(.debug) }
.line 0 : { *(.line) }
/* GNU DWARF 1 extensions */
.debug_srcinfo 0 : { *(.debug_srcinfo) }
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/* DWARF 1.1 and DWARF 2 */
.debug_aranges 0 : { *(.debug_aranges) }
.debug_pubnames 0 : { *(.debug_pubnames) }
/* DWARF 2 */
.debug_info 0 : { *(.debug_info) }
.debug_abbrev 0 : { *(.debug_abbrev) }
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.debug_loc 0 : { *(.debug_loc) }
.debug_macinfo 0 : { *(.debug_macinfo) }
}

62
backends/plugins/ds/ds-provider.cpp Normal file
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/* 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/>.
*
*/
// Allow use of stuff in <nds.h>
#define FORBIDDEN_SYMBOL_EXCEPTION_printf
#define FORBIDDEN_SYMBOL_EXCEPTION_unistd_h
#include "common/scummsys.h"
#if defined(DYNAMIC_MODULES) && defined(__DS__)
#include <malloc.h>
#include <nds.h>
#include "backends/plugins/ds/ds-provider.h"
#include "backends/plugins/elf/arm-loader.h"
// HACK: This is needed so that standard library functions that are only
// used in plugins can be found in the main executable.
void pluginHack() {
volatile double d = 0.0;
double d1 = 0.0;
d = atan2(d, d);
d = modf(d, &d1);
}
class DSDLObject : public ARMDLObject {
protected:
virtual void flushDataCache(void *ptr, uint32 len) const {
DC_FlushRange(ptr, len);
IC_InvalidateRange(ptr, len);
}
};
Plugin *DSPluginProvider::createPlugin(const Common::FSNode &node) const {
return new TemplatedELFPlugin<DSDLObject>(node.getPath());
}
void DSPluginProvider::addCustomDirectories(Common::FSList &dirs) const {
dirs.push_back(Common::FSNode("nitro:/plugins"));
}
#endif // defined(DYNAMIC_MODULES) && defined(__DS__)

37
backends/plugins/ds/ds-provider.h Normal file
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/* 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/>.
*
*/
#if defined(DYNAMIC_MODULES) && defined(__DS__)
#ifndef BACKENDS_PLUGINS_DS_PROVIDER_H
#define BACKENDS_PLUGINS_DS_PROVIDER_H
#include "backends/plugins/elf/elf-provider.h"
class DSPluginProvider : public ELFPluginProvider {
public:
Plugin *createPlugin(const Common::FSNode &node) const;
void addCustomDirectories(Common::FSList &dirs) const;
};
#endif // BACKENDS_PLUGINS_DS_PROVIDER_H
#endif // defined(DYNAMIC_MODULES) && defined(__DS__)

214
backends/plugins/ds/plugin.ld Normal file
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OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
OUTPUT_ARCH(arm)
/* PHDRS specifies ELF Program Headers (or segments) to the plugin linker */
PHDRS {
plugin PT_LOAD ; /* Specifies that the plugin segment should be loaded from file */
}
SECTIONS
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PROVIDE_HIDDEN (__rel_iplt_start = .);
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}
.init :
{
KEEP (*(.init))
} =0
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/* Adjust the address for the data segment. We want to adjust up to
the same address within the page on the next page up. */
. = ALIGN(CONSTANT (MAXPAGESIZE)) + (. & (CONSTANT (MAXPAGESIZE) - 1));
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.eh_frame : ONLY_IF_RW { KEEP (*(.eh_frame)) }
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109
backends/plugins/dynamic-plugin.h Normal file
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/* 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/>.
*
*/
#ifndef BACKENDS_PLUGINS_DYNAMICPLUGIN_H
#define BACKENDS_PLUGINS_DYNAMICPLUGIN_H
#include "base/plugins.h"
#include "common/textconsole.h"
class DynamicPlugin : public Plugin {
protected:
typedef int32 (*IntFunc)();
typedef void (*VoidFunc)();
typedef PluginObject *(*GetObjectFunc)();
virtual VoidFunc findSymbol(const char *symbol) = 0;
const Common::Path _filename;
public:
DynamicPlugin(const Common::Path &filename) :
_filename(filename) {}
bool loadPlugin() override {
// Validate the plugin API version
IntFunc verFunc = (IntFunc)findSymbol("PLUGIN_getVersion");
if (!verFunc) {
unloadPlugin();
return false;
}
if (verFunc() != PLUGIN_VERSION) {
warning("Plugin uses a different API version (you have: '%d', needed is: '%d')", verFunc(), PLUGIN_VERSION);
unloadPlugin();
return false;
}
// Get the type of the plugin
IntFunc typeFunc = (IntFunc)findSymbol("PLUGIN_getType");
if (!typeFunc) {
unloadPlugin();
return false;
}
_type = (PluginType)typeFunc();
if (_type >= PLUGIN_TYPE_MAX) {
warning("Plugin type unknown: %d", _type);
unloadPlugin();
return false;
}
// Validate the plugin type API version
IntFunc typeVerFunc = (IntFunc)findSymbol("PLUGIN_getTypeVersion");
if (!typeVerFunc) {
unloadPlugin();
return false;
}
if (typeVerFunc() != pluginTypeVersions[_type]) {
warning("Plugin uses a different type API version (you have: '%d', needed is: '%d')", typeVerFunc(), pluginTypeVersions[_type]);
unloadPlugin();
return false;
}
// Get the plugin's instantiator object
GetObjectFunc getObject = (GetObjectFunc)findSymbol("PLUGIN_getObject");
if (!getObject) {
unloadPlugin();
return false;
}
// Get the plugin object
_pluginObject = getObject();
if (!_pluginObject) {
warning("Couldn't get the plugin object");
unloadPlugin();
return false;
}
return true;
}
void unloadPlugin() override {
delete _pluginObject;
_pluginObject = nullptr;
}
Common::Path getFileName() const override {
return _filename;
}
};
#endif

137
backends/plugins/elf/arm-loader.cpp Normal file
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/* 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"
#if defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER) && defined(ARM_TARGET)
#include "backends/plugins/elf/arm-loader.h"
#include "common/debug.h"
bool ARMDLObject::relocate(Elf32_Off offset, Elf32_Word size, byte *relSegment) {
Elf32_Rel *rel = 0; //relocation entry
// Allocate memory for relocation table
if (!(rel = (Elf32_Rel *)malloc(size))) {
warning("elfloader: Could not allocate %d bytes for the relocation table", size);
return false;
}
// Read in our relocation table
if (!_file->seek(offset, SEEK_SET) || _file->read(rel, size) != size) {
warning("elfloader: Relocation table load failed.");
free(rel);
return false;
}
// Treat each relocation entry. Loop over all of them
uint32 cnt = size / sizeof(*rel);
debug(2, "elfloader: Loaded relocation table. %d entries. base address=%p", cnt, relSegment);
int32 a = 0;
uint32 relocation = 0;
// Loop over relocation entries
for (uint32 i = 0; i < cnt; i++) {
// Get the symbol this relocation entry is referring to
Elf32_Sym *sym = _symtab + (REL_INDEX(rel[i].r_info));
// Get the target instruction in the code.
uint32 *target = (uint32 *)((byte *)relSegment + rel[i].r_offset - _segmentVMA);
// uint32 origTarget = *target; //Save for debugging
// Act differently based on the type of relocation
switch (REL_TYPE(rel[i].r_info)) {
case R_ARM_NONE:
// debug(8, "elfloader: R_ARM_NONE: No relocation.");
break;
case R_ARM_ABS32:
case R_ARM_TARGET1:
if (sym->st_shndx < SHN_LOPROC) { // Only shift for plugin section.
a = *target; // Get full 32 bits of addend
relocation = a - _segmentVMA + Elf32_Addr(_segment); // Shift by main offset
*target = relocation;
// debug(8, "elfloader: R_ARM_ABS32: i=%d, a=%x, origTarget=%x, target=%x", i, a, origTarget, *target);
}
break;
// Note: PREL31 often points to a different section, so if we ever load in several segments, this needs to be adjusted
case R_ARM_PREL31:
// debug(8, "elfloader: R_ARM_PREL31: PC-relative reference, ld takes care of necessary relocation work for us.");
break;
case R_ARM_PC24:
// debug(8, "elfloader: R_ARM_PC24: PC-relative jump, ld takes care of necessary relocation work for us.");
break;
case R_ARM_THM_CALL:
// debug(8, "elfloader: R_ARM_THM_CALL: PC-relative jump, ld takes care of necessary relocation work for us.");
break;
case R_ARM_CALL:
case R_ARM_JUMP24:
// debug(8, "elfloader: R_ARM_CALL/R_ARM_JUMP24: PC-relative jump, ld takes care of necessary relocation work for us.");
break;
case R_ARM_V4BX:
// debug(8, "elfloader: R_ARM_V4BX: No relocation calculation necessary.");
break;
default:
warning("elfloader: Unknown relocation type %d.", REL_TYPE(rel[i].r_info));
free(rel);
return false;
}
}
free(rel);
return true;
}
bool ARMDLObject::relocateRels(Elf32_Ehdr *ehdr, Elf32_Shdr *shdr) {
// Loop over sections, finding relocation sections
for (uint32 i = 0; i < ehdr->e_shnum; i++) {
Elf32_Shdr *curShdr = &(shdr[i]);
if ((curShdr->sh_type == SHT_REL || curShdr->sh_type == SHT_RELA) && // Check for a relocation section
curShdr->sh_entsize == sizeof(Elf32_Rel) && // Check for proper relocation size
int32(curShdr->sh_link) == _symtab_sect && // Check that the sh_link connects to our symbol table
curShdr->sh_info < ehdr->e_shnum && // Check that the relocated section exists
(shdr[curShdr->sh_info].sh_flags & SHF_ALLOC)) { // Check if relocated section resides in memory
if (curShdr->sh_type == SHT_RELA) {
warning("elfloader: RELA entries not supported yet!");
return false;
}
if (!relocate(curShdr->sh_offset, curShdr->sh_size, _segment))
return false;
}
}
return true;
}
#endif /* defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER) && defined(ARM_TARGET) */

39
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/* 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/>.
*
*/
#ifndef BACKENDS_PLUGINS_ARM_LOADER_H
#define BACKENDS_PLUGINS_ARM_LOADER_H
#include "common/scummsys.h"
#if defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER) && defined(ARM_TARGET)
#include "backends/plugins/elf/elf-loader.h"
class ARMDLObject : public DLObject {
protected:
virtual bool relocate(Elf32_Off offset, Elf32_Word size, byte *relSegment);
virtual bool relocateRels(Elf32_Ehdr *ehdr, Elf32_Shdr *shdr);
};
#endif /* defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER) && defined(ARM_TARGET) */
#endif /* BACKENDS_PLUGINS_ARM_LOADER_H */

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/* 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"
#if defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER)
#include "backends/plugins/elf/elf-loader.h"
#include "backends/plugins/elf/memory-manager.h"
#include "common/debug.h"
#include "common/file.h"
#include "common/fs.h"
#include "common/ptr.h"
#include <malloc.h> // for memalign()
DLObject::DLObject() :
_file(0),
_segment(0),
_symtab(0),
_strtab(0),
_segmentSize(0),
_segmentOffset(0),
_segmentVMA(0),
_symbol_cnt(0),
_symtab_sect(-1),
_dtors_start(0),
_dtors_end(0) {
}
DLObject::~DLObject() {
discardSymtab();
discardSegment();
}
// Expel the symbol table from memory
void DLObject::discardSymtab() {
free(_symtab);
_symtab = 0;
free(_strtab);
_strtab = 0;
_symbol_cnt = 0;
}
void DLObject::discardSegment() {
if (_segment) {
// Restore default protection before returning memory
protectMemory(_segment, _segmentSize, PF_R | PF_W);
deallocateMemory(_segment, _segmentSize);
}
_segment = 0;
_segmentSize = 0;
_segmentOffset = 0;
_segmentVMA = 0;
}
// Unload all objects from memory
void DLObject::unload() {
discardSymtab();
discardSegment();
}
bool DLObject::readElfHeader(Elf32_Ehdr *ehdr) {
assert(_file);
// Start reading the elf header. Check for errors and magic
if (_file->read(ehdr, sizeof(*ehdr)) != sizeof(*ehdr) ||
memcmp(ehdr->e_ident, ELFMAG, SELFMAG)) {
warning("elfloader: No ELF file.");
return false;
}
if (ehdr->e_ident[EI_CLASS] != ELFCLASS32) {
warning("elfloader: Wrong ELF file class.");
return false;
}
if (ehdr->e_ident[EI_DATA] !=
#ifdef SCUMM_BIG_ENDIAN
ELFDATA2MSB
#else
ELFDATA2LSB
#endif
) {
warning("elfloader: Wrong ELF file endianess.");
return false;
}
if (ehdr->e_ident[EI_VERSION] != EV_CURRENT) {
warning("elfloader: Wrong ELF file version.");
return false;
}
if (ehdr->e_type != ET_EXEC) {
warning("elfloader: No executable ELF file.");
return false;
}
if (ehdr->e_machine !=
#ifdef ARM_TARGET
EM_ARM
#endif
#ifdef MIPS_TARGET
EM_MIPS
#endif
#ifdef PPC_TARGET
EM_PPC
#endif
) {
warning("elfloader: Wrong ELF file architecture.");
return false;
}
if (ehdr->e_phentsize < sizeof(Elf32_Phdr) || // Check for size of program header
ehdr->e_shentsize != sizeof(Elf32_Shdr)) { // Check for size of section header
warning("elfloader: Invalid ELF structure sizes.");
return false;
}
debug(2, "elfloader: phoff = %d, phentsz = %d, phnum = %d",
ehdr->e_phoff, ehdr->e_phentsize, ehdr->e_phnum);
return true;
}
bool DLObject::readProgramHeaders(Elf32_Ehdr *ehdr, Elf32_Phdr *phdr, Elf32_Half num) {
assert(_file);
// Read program header
if (!_file->seek(ehdr->e_phoff + sizeof(*phdr) * num, SEEK_SET) ||
_file->read(phdr, sizeof(*phdr)) != sizeof(*phdr)) {
warning("elfloader: Program header load failed.");
return false;
}
// Check program header values
if (phdr->p_type != PT_LOAD || phdr->p_filesz > phdr->p_memsz) {
warning("elfloader: Invalid program header %x", phdr->p_type);
return false;
}
debug(2, "elfloader: offs = %x, filesz = %x, memsz = %x, align = %x",
phdr->p_offset, phdr->p_filesz, phdr->p_memsz, phdr->p_align);
return true;
}
bool DLObject::loadSegment(Elf32_Phdr *phdr) {
_segment = (byte *)allocateMemory(phdr->p_align, phdr->p_memsz);
if (!_segment) {
warning("elfloader: Could not allocate %d bytes for the segment", phdr->p_memsz);
return false;
}
debug(2, "elfloader: Allocated segment @ %p", _segment);
// Get offset to load segment into
_segmentSize = phdr->p_memsz;
_segmentVMA = phdr->p_vaddr;
// Set .bss segment to 0 if necessary
if (phdr->p_memsz > phdr->p_filesz) {
debug(2, "elfloader: Setting %p to %p to 0 for bss",
_segment + phdr->p_filesz, _segment + phdr->p_memsz);
memset(_segment + phdr->p_filesz, 0, phdr->p_memsz - phdr->p_filesz);
}
debug(2, "elfloader: Reading the segment into memory");
// Read the segment into memory
if (!_file->seek(phdr->p_offset, SEEK_SET) ||
_file->read(_segment, phdr->p_filesz) != phdr->p_filesz) {
warning("elfloader: Segment load failed.");
return false;
}
debug(2, "elfloader: Segment has been read into memory");
return true;
}
Elf32_Shdr * DLObject::loadSectionHeaders(Elf32_Ehdr *ehdr) {
assert(_file);
Elf32_Shdr *shdr = 0;
// Allocate memory for section headers
if (!(shdr = (Elf32_Shdr *)malloc(ehdr->e_shnum * sizeof(*shdr)))) {
warning("elfloader: Could not allocate %zu bytes for the section headers", ehdr->e_shnum * sizeof(*shdr));
return 0;
}
// Read from file into section headers
if (!_file->seek(ehdr->e_shoff, SEEK_SET) ||
_file->read(shdr, ehdr->e_shnum * sizeof(*shdr)) !=
ehdr->e_shnum * sizeof(*shdr)) {
warning("elfloader: Section headers load failed.");
free(shdr);
return 0;
}
return shdr;
}
int DLObject::findSymbolTableSection(Elf32_Ehdr *ehdr, Elf32_Shdr *shdr) {
int SymbolTableSection = -1;
// Loop over sections, looking for symbol table linked to a string table
for (uint32 i = 0; i < ehdr->e_shnum; i++) {
if (shdr[i].sh_type == SHT_SYMTAB &&
shdr[i].sh_entsize == sizeof(Elf32_Sym) &&
shdr[i].sh_link < ehdr->e_shnum &&
shdr[shdr[i].sh_link].sh_type == SHT_STRTAB) {
SymbolTableSection = i;
break;
}
}
return SymbolTableSection;
}
int DLObject::loadSymbolTable(Elf32_Ehdr *ehdr, Elf32_Shdr *shdr) {
assert(_file);
_symtab_sect = findSymbolTableSection(ehdr, shdr);
// Check for no symbol table
if (_symtab_sect < 0) {
warning("elfloader: No symbol table.");
return -1;
}
debug(2, "elfloader: Symbol section at section %d, size %x",
_symtab_sect, shdr[_symtab_sect].sh_size);
// Allocate memory for symbol table
if (!(_symtab = (Elf32_Sym *)malloc(shdr[_symtab_sect].sh_size))) {
warning("elfloader: Could not allocate %d bytes for the symbol table", shdr[_symtab_sect].sh_size);
return -1;
}
// Read symbol table into memory
if (!_file->seek(shdr[_symtab_sect].sh_offset, SEEK_SET) ||
_file->read(_symtab, shdr[_symtab_sect].sh_size) !=
shdr[_symtab_sect].sh_size) {
warning("elfloader: Symbol table load failed.");
free(_symtab);
_symtab = 0;
return -1;
}
// Set number of symbols
_symbol_cnt = shdr[_symtab_sect].sh_size / sizeof(Elf32_Sym);
debug(2, "elfloader: Loaded %d symbols.", _symbol_cnt);
return _symtab_sect;
}
bool DLObject::loadStringTable(Elf32_Shdr *shdr) {
assert(_file);
uint32 string_sect = shdr[_symtab_sect].sh_link;
// Allocate memory for string table
if (!(_strtab = (char *)malloc(shdr[string_sect].sh_size))) {
warning("elfloader: Could not allocate %d bytes for the string table", shdr[string_sect].sh_size);
return false;
}
// Read string table into memory
if (!_file->seek(shdr[string_sect].sh_offset, SEEK_SET) ||
_file->read(_strtab, shdr[string_sect].sh_size) !=
shdr[string_sect].sh_size) {
warning("elfloader: Symbol table strings load failed.");
free(_strtab);
_strtab = 0;
return false;
}
return true;
}
void DLObject::relocateSymbols(ptrdiff_t offset) {
// Loop over symbols, add relocation offset
Elf32_Sym *s = _symtab;
for (uint32 c = _symbol_cnt; c--; s++) {
// Make sure we don't relocate special valued symbols
if (s->st_shndx < SHN_LOPROC) {
if (s->st_value < _segmentVMA)
s->st_value = _segmentVMA; // deal with symbols referring to sections, which start before the VMA
s->st_value += offset;
if (s->st_value < Elf32_Addr(_segment) ||
s->st_value > Elf32_Addr(_segment) + _segmentSize)
warning("elfloader: Symbol out of bounds! st_value = %x", s->st_value);
}
}
}
// Track the size of the plugin through memory manager without loading
// the plugin into memory.
//
void DLObject::trackSize(const Common::Path &path) {
_file = Common::FSNode(path).createReadStream();
if (!_file) {
warning("elfloader: File %s not found.", path.toString(Common::Path::kNativeSeparator).c_str());
return;
}
Elf32_Ehdr ehdr;
Elf32_Phdr phdr;
if (!readElfHeader(&ehdr)) {
delete _file;
_file = 0;
return;
}
ELFMemMan.trackPlugin(true); // begin tracking the plugin size
// Load the segments
for (uint32 i = 0; i < ehdr.e_phnum; i++) {
debug(2, "elfloader: Loading segment %d", i);
if (!readProgramHeaders(&ehdr, &phdr, i)) {
delete _file;
_file = 0;
return;
}
if (phdr.p_flags & PF_X) { // check for executable, allocated segment
ELFMemMan.trackAlloc(phdr.p_align, phdr.p_memsz);
}
}
ELFMemMan.trackPlugin(false); // we're done tracking the plugin size
delete _file;
_file = 0;
// No need to track the symbol table sizes -- they get discarded
}
bool DLObject::load() {
Elf32_Ehdr ehdr;
Elf32_Phdr phdr;
if (readElfHeader(&ehdr) == false)
return false;
//Load the segments
for (uint32 i = 0; i < ehdr.e_phnum; i++) {
debug(2, "elfloader: Loading segment %d", i);
if (readProgramHeaders(&ehdr, &phdr, i) == false)
return false;
if (!loadSegment(&phdr))
return false;
}
Elf32_Shdr *shdr = loadSectionHeaders(&ehdr);
if (!shdr)
return false;
_symtab_sect = loadSymbolTable(&ehdr, shdr);
if (_symtab_sect < 0) {
free(shdr);
return false;
}
if (!loadStringTable(shdr)) {
free(shdr);
return false;
}
// Offset by our segment allocated address
// must use _segmentVMA here for multiple segments (MIPS)
_segmentOffset = ptrdiff_t(_segment) - _segmentVMA;
relocateSymbols(_segmentOffset);
if (!relocateRels(&ehdr, shdr)) {
free(shdr);
return false;
}
protectMemory(_segment, _segmentSize, phdr.p_flags);
return true;
}
bool DLObject::open(const Common::Path &path) {
Common::String pathS(path.toString(Common::Path::kNativeSeparator));
void *ctors_start, *ctors_end;
debug(2, "elfloader: open(\"%s\")", pathS.c_str());
_file = Common::FSNode(path).createReadStream();
if (!_file) {
warning("elfloader: File %s not found.", pathS.c_str());
return false;
}
debug(2, "elfloader: %s found!", pathS.c_str());
/*Try to load and relocate*/
if (!load()) {
unload();
return false;
}
debug(2, "elfloader: Loaded!");
delete _file;
_file = 0;
flushDataCache(_segment, _segmentSize);
ctors_start = symbol("___plugin_ctors");
ctors_end = symbol("___plugin_ctors_end");
_dtors_start = symbol("___plugin_dtors");
_dtors_end = symbol("___plugin_dtors_end");
if (!ctors_start || !ctors_end || !_dtors_start || !_dtors_end) {
warning("elfloader: Missing ctors/dtors.");
_dtors_start = _dtors_end = 0;
unload();
return false;
}
debug(2, "elfloader: Calling constructors.");
for (void (**f)(void) = (void (**)(void))ctors_start; f != ctors_end; f++)
(**f)();
debug(2, "elfloader: %s opened ok.", pathS.c_str());
return true;
}
bool DLObject::close() {
if (_dtors_start && _dtors_end)
for (void (**f)(void) = (void (**)(void))_dtors_start; f != _dtors_end; f++)
(**f)();
_dtors_start = _dtors_end = 0;
unload();
return true;
}
void *DLObject::symbol(const char *name) {
debug(2, "elfloader: Symbol(\"%s\")", name);
if (!_symtab || !_strtab || _symbol_cnt < 1) {
warning("elfloader: No symbol table loaded.");
return 0;
}
Elf32_Sym *s = _symtab;
for (uint32 c = _symbol_cnt; c--; s++)
// We can only import symbols that are global or weak in the plugin
if ((SYM_BIND(s->st_info) == STB_GLOBAL ||
SYM_BIND(s->st_info) == STB_WEAK) &&
!strcmp(name, _strtab + s->st_name)) {
// We found the symbol
debug(2, "elfloader: => 0x%08x", s->st_value);
return (void *)s->st_value;
}
// We didn't find the symbol
warning("elfloader: Symbol \"%s\" not found.", name);
return 0;
}
void *DLObject::allocateMemory(uint32 align, uint32 size) {
return ELFMemMan.pluginAllocate(align, size);
}
void DLObject::deallocateMemory(void *ptr, uint32 size) {
ELFMemMan.pluginDeallocate(ptr);
}
#endif /* defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER) */

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/* 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/>.
*
*/
#ifndef BACKENDS_PLUGINS_ELF_LOADER_H
#define BACKENDS_PLUGINS_ELF_LOADER_H
#include "common/scummsys.h"
#if defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER)
#include <stddef.h>
#include "backends/plugins/elf/elf32.h"
#include "backends/plugins/dynamic-plugin.h"
#include "common/stream.h"
/**
* DLObject
*
* Class that most directly handles operations on a plugin file
* (opening it for reading, loading/unloading it in memory, finding a specific symbol in the file, etc.)
* Subclasses have the same functionality, but implementations specific to different processors/platforms.
*/
class DLObject {
protected:
Common::SeekableReadStream *_file;
byte *_segment;
Elf32_Sym *_symtab;
char *_strtab;
uint32 _segmentSize;
ptrdiff_t _segmentOffset;
uint32 _segmentVMA;
uint32 _symbol_cnt;
int32 _symtab_sect;
void *_dtors_start, *_dtors_end;
virtual void unload();
bool load();
bool readElfHeader(Elf32_Ehdr *ehdr);
bool readProgramHeaders(Elf32_Ehdr *ehdr, Elf32_Phdr *phdr, Elf32_Half num);
virtual bool loadSegment(Elf32_Phdr *phdr);
Elf32_Shdr *loadSectionHeaders(Elf32_Ehdr *ehdr);
int findSymbolTableSection(Elf32_Ehdr *ehdr, Elf32_Shdr *shdr);
int loadSymbolTable(Elf32_Ehdr *ehdr, Elf32_Shdr *shdr);
bool loadStringTable(Elf32_Shdr *shdr);
virtual void relocateSymbols(ptrdiff_t offset);
void discardSegment();
// architecture specific
/**
* Follow the instruction of a relocation section.
*
* @param fileOffset Offset into the File
* @param size Size of relocation section
* @param relSegment Base address of relocated segment in memory (memory offset)
*/
virtual bool relocate(Elf32_Off offset, Elf32_Word size, byte *relSegment) = 0;
virtual bool relocateRels(Elf32_Ehdr *ehdr, Elf32_Shdr *shdr) = 0;
// platform specific
virtual void flushDataCache(void *ptr, uint32 len) const = 0;
virtual void *allocateMemory(uint32 align, uint32 size);
virtual void deallocateMemory(void *ptr, uint32 size);
virtual void protectMemory(void *ptr, uint32 len, int prot) const {};
public:
DLObject();
virtual ~DLObject();
/**
* Test the size of the plugin in memory using the memory manager.
* @param path Path of file
*/
void trackSize(const Common::Path &path);
bool open(const Common::Path &path);
bool close();
void *symbol(const char *name);
void discardSymtab();
};
#endif /* defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER) */
#endif /* BACKENDS_PLUGINS_ELF_LOADER_H */

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/* 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"
#if defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER)
#ifdef ELF_LOADER_CXA_ATEXIT
#include <cxxabi.h>
#endif
#include "backends/plugins/elf/elf-provider.h"
#include "backends/plugins/dynamic-plugin.h"
#include "backends/plugins/elf/memory-manager.h"
#include "common/debug.h"
#include "common/fs.h"
/* Note about ELF_LOADER_CXA_ATEXIT:
*
* consider the code:
*
* class Foobar {
* const char *work() {
* static String foo = "bar";
* return s.c_str();
* }
* }
*
* When instantiating Foobar and calling work() for the first time the String
* foo will be constructed. GCC automatically registers its destruction via
* either atexit() or __cxa_atexit(). Only the latter will add information
* about which DSO did the construction (Using &__dso_handle).
*
* __cxa_atexit allows plugins to reference C++ ABI symbols in the main
* executable without code duplication (No need to link the plugin against
* libstdc++), since we can distinguish which registered exit functions belong
* to a specific DSO. When unloading a plugin, we just use the C++ ABI call
* __cxa_finalize(&__dso_handle) to call all destructors of only that DSO.
*
* Prerequisites:
* - The used libc needs to support __cxa_atexit
* - -fuse-cxa-atexit in CXXFLAGS
* - Every plugin needs its own hidden __dso_handle symbol
* This is automatically done via REGISTER_PLUGIN_DYNAMIC, see base/plugins.h
*
* When __cxa_atexit can not be used, each plugin needs to link against
* libstdc++ to embed its own set of C++ ABI symbols. When not doing so,
* registered destructors of already unloaded plugins will crash the
* application upon returning from main().
*
* See "3.3.5 DSO Object Destruction API" of the C++ ABI
*/
DynamicPlugin::VoidFunc ELFPlugin::findSymbol(const char *symbol) {
void *func = 0;
if (_dlHandle)
func = _dlHandle->symbol(symbol);
if (!func) {
if (!_dlHandle)
warning("elfloader: Failed loading symbol '%s' from plugin '%s' (Handle is NULL)", symbol, _filename.toString(Common::Path::kNativeSeparator).c_str());
else
warning("elfloader: Failed loading symbol '%s' from plugin '%s'", symbol, _filename.toString(Common::Path::kNativeSeparator).c_str());
}
// FIXME HACK: This is a HACK to circumvent a clash between the ISO C++
// standard and POSIX: ISO C++ disallows casting between function pointers
// and data pointers, but dlsym always returns a void pointer. For details,
// see e.g. <https://web.archive.org/web/20061205092618/http://www.trilithium.com/johan/2004/12/problem-with-dlsym/>.
assert(sizeof(VoidFunc) == sizeof(func));
VoidFunc tmp;
memcpy(&tmp, &func, sizeof(VoidFunc));
return tmp;
}
/**
* Test the size of the plugin.
*/
void ELFPlugin::trackSize() {
// All we need to do is create our object, track its size, then delete it
DLObject *obj = makeDLObject();
obj->trackSize(_filename);
delete obj;
}
bool ELFPlugin::loadPlugin() {
assert(!_dlHandle);
DLObject *obj = makeDLObject();
if (obj->open(_filename)) {
_dlHandle = obj;
} else {
delete obj;
_dlHandle = 0;
}
if (!_dlHandle) {
warning("elfloader: Failed loading plugin '%s'", _filename.toString(Common::Path::kNativeSeparator).c_str());
return false;
}
CharFunc buildDateFunc = (CharFunc)findSymbol("PLUGIN_getBuildDate");
if (!buildDateFunc) {
unloadPlugin();
warning("elfloader: plugin '%s' is missing symbols", _filename.toString(Common::Path::kNativeSeparator).c_str());
return false;
}
if (strncmp(gScummVMPluginBuildDate, buildDateFunc(), strlen(gScummVMPluginBuildDate))) {
unloadPlugin();
warning("elfloader: plugin '%s' has a different build date", _filename.toString(Common::Path::kNativeSeparator).c_str());
return false;
}
bool ret = DynamicPlugin::loadPlugin();
#ifdef ELF_LOADER_CXA_ATEXIT
if (ret) {
// FIXME HACK: Reverse HACK of findSymbol() :P
VoidFunc tmp;
tmp = findSymbol("__dso_handle");
memcpy(&_dso_handle, &tmp, sizeof(VoidFunc));
debug(2, "elfloader: __dso_handle is %p", _dso_handle);
}
#endif
_dlHandle->discardSymtab();
return ret;
}
void ELFPlugin::unloadPlugin() {
DynamicPlugin::unloadPlugin();
if (_dlHandle) {
#ifdef ELF_LOADER_CXA_ATEXIT
if (_dso_handle) {
debug(2, "elfloader: calling __cxa_finalize");
__cxxabiv1::__cxa_finalize(_dso_handle);
_dso_handle = 0;
}
#endif
if (!_dlHandle->close())
warning("elfloader: Failed unloading plugin '%s'", _filename.toString(Common::Path::kNativeSeparator).c_str());
delete _dlHandle;
_dlHandle = 0;
}
}
/**
* We override this function in FilePluginProvider to allow the single
* plugin method to create a non-fragmenting memory allocation. We take
* the plugins found and tell the memory manager to allocate space for
* them.
*/
PluginList ELFPluginProvider::getPlugins() {
PluginList pl = FilePluginProvider::getPlugins();
#if defined(UNCACHED_PLUGINS) && !defined(ELF_NO_MEM_MANAGER)
// This static downcast is safe because all of the plugins must
// be ELF plugins
for (PluginList::iterator p = pl.begin(); p != pl.end(); ++p) {
(static_cast<ELFPlugin *>(*p))->trackSize();
}
// The Memory Manager should now allocate space based on the information
// it collected
if (!pl.empty()) {
ELFMemMan.allocateHeap();
}
#endif
return pl;
}
bool ELFPluginProvider::isPluginFilename(const Common::FSNode &node) const {
// Check the plugin suffix
Common::String filename = node.getFileName();
if (!filename.hasSuffix(".PLG") && !filename.hasSuffix(".plg") &&
!filename.hasSuffix(".PLUGIN") && !filename.hasSuffix(".plugin"))
return false;
return true;
}
#endif // defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER)

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/* 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/>.
*
*/
#ifndef BACKENDS_PLUGINS_ELF_PROVIDER_H
#define BACKENDS_PLUGINS_ELF_PROVIDER_H
#include "common/scummsys.h"
#if defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER)
#include "backends/plugins/elf/elf-loader.h"
#include "common/fs.h"
/**
* ELFPlugin
*
* Objects of this class are returned when the PluginManager calls
* getPlugins() on an ELFPluginProvider. An intermediary class for
* dealing with plugin files, ELFPlugin is responsible for creating/destroying
* a DLObject that handles the opening/loading/unloading of the plugin file whose
* path in the target backend's file system is "_filename".
*/
class ELFPlugin : public DynamicPlugin {
protected:
typedef const char *(*CharFunc)();
DLObject *_dlHandle;
void *_dso_handle;
virtual VoidFunc findSymbol(const char *symbol);
public:
ELFPlugin(const Common::Path &filename) :
DynamicPlugin(filename),
_dlHandle(0),
_dso_handle(0) {
}
virtual ~ELFPlugin() {
if (_dlHandle)
unloadPlugin();
}
virtual DLObject *makeDLObject() = 0;
virtual bool loadPlugin();
virtual void unloadPlugin();
void trackSize();
};
template<class T>
class TemplatedELFPlugin : public ELFPlugin {
public:
TemplatedELFPlugin(const Common::Path &filename) :
ELFPlugin(filename) {
}
virtual DLObject *makeDLObject() {
return new T();
}
};
class ELFPluginProvider : public FilePluginProvider {
protected:
virtual Plugin *createPlugin(const Common::FSNode &node) const = 0;
virtual PluginList getPlugins();
bool isPluginFilename(const Common::FSNode &node) const;
};
#endif // defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER)
#endif /* BACKENDS_PLUGINS_ELF_PROVIDER_H */

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/* 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/>.
*
*/
#ifndef BACKENDS_ELF_H
#define BACKENDS_ELF_H
#include "common/scummsys.h"
#if defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER)
/**
* ELF stuff:
* The contents of this file were gathered mainly from the SYSTEM V APPLICATION BINARY INTERFACE.
* Processor-specific things were garnered from processor-specific supplements to the abi.
*/
typedef uint16 Elf32_Half, Elf32_Section;
typedef uint32 Elf32_Word, Elf32_Addr, Elf32_Off;
typedef int32 Elf32_Sword;
typedef Elf32_Half Elf32_Versym;
#define EI_NIDENT (16)
#define SELFMAG 4
/* ELF File format structures. Look up ELF structure for more details */
// ELF header (contains info about the file)
typedef struct {
byte e_ident[EI_NIDENT]; /* Magic number and other info */
Elf32_Half e_type; /* Object file type */
Elf32_Half e_machine; /* Architecture */
Elf32_Word e_version; /* Object file version */
Elf32_Addr e_entry; /* Entry point virtual address */
Elf32_Off e_phoff; /* Program header table file offset */
Elf32_Off e_shoff; /* Section header table file offset */
Elf32_Word e_flags; /* Processor-specific flags */
Elf32_Half e_ehsize; /* ELF header size in bytes */
Elf32_Half e_phentsize; /* Program header table entry size */
Elf32_Half e_phnum; /* Program header table entry count */
Elf32_Half e_shentsize; /* Section header table entry size */
Elf32_Half e_shnum; /* Section header table entry count */
Elf32_Half e_shstrndx; /* Section header string table index */
} Elf32_Ehdr;
// Should be in e_ident
#define ELFMAG "\177ELF" /* ELF Magic number */
#define EI_CLASS 4 /* File class byte index */
#define ELFCLASS32 1 /* 32-bit objects */
#define EI_DATA 5 /* Data encoding byte index */
#define ELFDATA2LSB 1 /* 2's complement, little endian */
#define ELFDATA2MSB 2 /* 2's complement, big endian */
#define EI_VERSION 6
#define EV_CURRENT 1 /* Current version */
// e_type values
#define ET_NONE 0 /* no file type */
#define ET_REL 1 /* relocatable */
#define ET_EXEC 2 /* executable */
#define ET_DYN 3 /* shared object */
#define ET_CORE 4 /* core file */
// e_machine values
#define EM_MIPS 8
#define EM_PPC 20
#define EM_ARM 40
#define EM_SH 42
// Program header (contains info about segment)
typedef struct {
Elf32_Word p_type; /* Segment type */
Elf32_Off p_offset; /* Segment file offset */
Elf32_Addr p_vaddr; /* Segment virtual address */
Elf32_Addr p_paddr; /* Segment physical address */
Elf32_Word p_filesz; /* Segment size in file */
Elf32_Word p_memsz; /* Segment size in memory */
Elf32_Word p_flags; /* Segment flags */
Elf32_Word p_align; /* Segment alignment */
} Elf32_Phdr;
// p_type values
#define PT_NULL 0 /* ignored */
#define PT_LOAD 1 /* loadable segment */
#define PT_DYNAMIC 2 /* dynamic linking info */
#define PT_INTERP 3 /* info about interpreter */
#define PT_NOTE 4 /* note segment */
#define PT_SHLIB 5 /* reserved */
#define PT_PHDR 6 /* Program header table */
#define PT_MIPS_REGINFO 0x70000000 /* Register usage info for MIPS */
#define PT_ARM_ARCHEXT 0x70000000 /* Platform architecture compatibility info for ARM */
#define PT_ARM_EXIDX 0x70000001 /* Exception unwind tables for ARM */
// p_flags value
#define PF_X 1 /* execute */
#define PF_W 2 /* write */
#define PF_R 4 /* read */
// Section header (contains info about section)
typedef struct {
Elf32_Word sh_name; /* Section name (string tbl index) */
Elf32_Word sh_type; /* Section type */
Elf32_Word sh_flags; /* Section flags */
Elf32_Addr sh_addr; /* Section virtual addr at execution */
Elf32_Off sh_offset; /* Section file offset */
Elf32_Word sh_size; /* Section size in bytes */
Elf32_Word sh_link; /* Link to another section */
Elf32_Word sh_info; /* Additional section information */
Elf32_Word sh_addralign; /* Section alignment */
Elf32_Word sh_entsize; /* Entry size if section holds table */
} Elf32_Shdr;
// sh_type values
#define SHT_NULL 0 /* Inactive section */
#define SHT_PROGBITS 1 /* Proprietary */
#define SHT_SYMTAB 2 /* Symbol table */
#define SHT_STRTAB 3 /* String table */
#define SHT_RELA 4 /* Relocation entries with addend */
#define SHT_HASH 5 /* Symbol hash table */
#define SHT_DYNAMIC 6 /* Info for dynamic linking */
#define SHT_NOTE 7 /* Note section */
#define SHT_NOBITS 8 /* Occupies no space */
#define SHT_REL 9 /* Relocation entries without addend */
#define SHT_SHLIB 10 /* Reserved */
#define SHT_DYNSYM 11 /* Minimal set of dynamic linking symbols */
#define SHT_MIPS_LIBLSIT 0x70000000 /* Info about dynamic shared object libs for MIPS*/
#define SHT_MIPS_CONFLICT 0x70000002 /* Conflicts btw executables and shared objects for MIPS */
#define SHT_MIPS_GPTAB 0x70000003 /* Global pointer table for MIPS*/
#define SHT_ARM_EXIDX 0x70000001 /* Exception Index table for ARM*/
#define SHT_ARM_PREEMPTMAP 0x70000002 /* BPABI DLL dynamic linking pre-emption map for ARM */
#define SHT_ARM_ATTRIBUTES 0x70000003 /* Object file compatibility attributes for ARM*/
// sh_flags values
#define SHF_WRITE 0 /* writable section */
#define SHF_ALLOC 2 /* section occupies memory */
#define SHF_EXECINSTR 4 /* machine instructions */
#define SHF_MIPS_GPREL 0x10000000 /* Must be made part of global data area for MIPS */
// Symbol entry (contain info about a symbol)
typedef struct {
Elf32_Word st_name; /* Symbol name (string tbl index) */
Elf32_Addr st_value; /* Symbol value */
Elf32_Word st_size; /* Symbol size */
byte st_info; /* Symbol type and binding */
byte st_other; /* Symbol visibility */
Elf32_Section st_shndx; /* Section index */
} Elf32_Sym;
// Extract from the st_info
#define SYM_TYPE(x) ((x) & 0xf)
#define SYM_BIND(x) ((x) >> 4)
// Symbol binding values from st_info
#define STB_LOCAL 0 /* Symbol not visible outside object */
#define STB_GLOBAL 1 /* Symbol visible to all object files */
#define STB_WEAK 2 /* Similar to STB_GLOBAL */
// Symbol type values from st_info
#define STT_NOTYPE 0 /* Not specified */
#define STT_OBJECT 1 /* Data object e.g. variable */
#define STT_FUNC 2 /* Function */
#define STT_SECTION 3 /* Section */
#define STT_FILE 4 /* Source file associated with object file */
// Special section header index values from st_shndex
#define SHN_UNDEF 0
#define SHN_LOPROC 0xFF00 /* Extended values */
#define SHN_ABS 0xFFF1 /* Absolute value: don't relocate */
#define SHN_COMMON 0xFFF2 /* Common block. Not allocated yet */
#define SHN_HIPROC 0xFF1F
#define SHN_HIRESERVE 0xFFFF
// Relocation entry with implicit addend (info about how to relocate)
typedef struct {
Elf32_Addr r_offset; /* Address */
Elf32_Word r_info; /* Relocation type and symbol index */
} Elf32_Rel;
// Relocation entry with explicit addend (info about how to relocate)
typedef struct {
Elf32_Addr r_offset; /* Address */
Elf32_Word r_info; /* Relocation type and symbol index */
Elf32_Sword r_addend; /* Addend */
} Elf32_Rela;
// Access macros for the relocation info
#define REL_TYPE(x) ((byte) (x)) /* Extract relocation type */
#define REL_INDEX(x) ((x)>>8) /* Extract relocation index into symbol table */
//MIPS relocation types
#define R_MIPS_NONE 0
#define R_MIPS_16 1
#define R_MIPS_32 2
#define R_MIPS_REL32 3
#define R_MIPS_26 4
#define R_MIPS_HI16 5
#define R_MIPS_LO16 6
#define R_MIPS_GPREL16 7
#define R_MIPS_LITERAL 8
#define R_MIPS_GOT16 9
#define R_MIPS_PC16 10
#define R_MIPS_CALL16 11
#define R_MIPS_GPREL32 12
#define R_MIPS_GOTHI16 13
#define R_MIPS_GOTLO16 14
#define R_MIPS_CALLHI16 15
#define R_MIPS_CALLLO16 16
// ARM relocation types
#define R_ARM_NONE 0
#define R_ARM_PC24 1
#define R_ARM_ABS32 2
#define R_ARM_THM_CALL 10
#define R_ARM_CALL 28
#define R_ARM_JUMP24 29
#define R_ARM_TARGET1 38
#define R_ARM_V4BX 40
#define R_ARM_PREL31 42
// PPC relocation types
#define R_PPC_NONE 0
#define R_PPC_ADDR32 1
#define R_PPC_ADDR16_LO 4
#define R_PPC_ADDR16_HI 5
#define R_PPC_ADDR16_HA 6
#define R_PPC_REL24 10
#define R_PPC_REL32 26
#endif // defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER)
#endif /* BACKENDS_ELF_H */

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/* 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"
#if defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER)
#include "backends/plugins/elf/memory-manager.h"
#include "common/debug.h"
#include "common/util.h"
#include <malloc.h>
namespace Common {
DECLARE_SINGLETON(ELFMemoryManager);
}
ELFMemoryManager::ELFMemoryManager() :
_heap(0), _heapSize(0), _heapAlign(0),
_trackAllocs(false), _measuredSize(0), _measuredAlign(0),
_bytesAllocated(0) {}
ELFMemoryManager::~ELFMemoryManager() {
free(_heap);
_heap = 0;
}
void ELFMemoryManager::trackPlugin(bool value) {
assert(!_heap);
if (value == _trackAllocs)
return;
_trackAllocs = value;
if (_trackAllocs) { // start measuring
// start tracking allocations
_measuredAlign = 0;
} else { // we're done measuring
// get the total allocated size
uint32 measuredSize = _allocList.back().end() - _allocList.front().start;
_heapSize = MAX(_heapSize, measuredSize);
_heapAlign = MAX(_heapAlign, _measuredAlign);
_allocList.clear();
_bytesAllocated = 0; // reset
debug(2, "measured a plugin of size %d. Max size %d. Max align %d", measuredSize, _heapSize, _heapAlign);
}
}
void ELFMemoryManager::trackAlloc(uint32 align, uint32 size) {
if (!_measuredAlign)
_measuredAlign = align;
// use the allocate function to simulate allocation
allocateOnHeap(align, size);
}
void ELFMemoryManager::allocateHeap() {
if (!_heapSize) {
warning("ELFMemoryManager: Unable to allocate the heap as its size could not be determined.");
return;
}
// The memory manager should only allocate once
assert (!_heap);
// clear the list
_allocList.clear();
_bytesAllocated = 0;
debug(2, "ELFMemoryManager: allocating %d bytes aligned at %d as the \
plugin heap", _heapSize, _heapAlign);
// prepare the heap
if (_heapAlign)
_heap = ::memalign(_heapAlign, _heapSize);
else
_heap = ::malloc(_heapSize);
assert(_heap);
}
void *ELFMemoryManager::pluginAllocate(uint32 size) {
if (_heap) {
return pluginAllocate(sizeof(void *), size);
}
return ::malloc(size);
}
void *ELFMemoryManager::pluginAllocate(uint32 align, uint32 size) {
if (_heap) {
return allocateOnHeap(align, size);
}
return ::memalign(align, size);
}
void ELFMemoryManager::pluginDeallocate(void *ptr) {
if (_heap) {
return deallocateFromHeap(ptr);
}
return ::free(ptr);
}
// Allocate space for the request in our heap
void *ELFMemoryManager::allocateOnHeap(uint32 align, uint32 size) {
byte *lastAddress = (byte *)_heap;
// We can't allow allocations smaller than sizeof(Allocation). This could
// only be from non-plugin allocations and would cause infinite recursion
// when allocating our Allocation in the list.
if (size <= sizeof(Allocation))
return 0;
Common::List<Allocation>::iterator i;
for (i = _allocList.begin(); i != _allocList.end(); i++) {
if (i->start - lastAddress > (int)size)
break;
lastAddress = i->end();
// align to desired alignment
if (align) {
lastAddress = (byte *)( ((uint32)lastAddress + align - 1) & ~(align - 1) );
}
}
// Check if we exceeded our heap limit
// We skip this case if we're only tracking allocations
if (!_trackAllocs && ((uint32)lastAddress + size > (uint32)_heap + _heapSize)) {
debug(2, "failed to find space to allocate %d bytes", size);
return 0;
}
_allocList.insert(i, Allocation(lastAddress, size));
_bytesAllocated += size;
debug(7, "ELFMemoryManager: allocated %d bytes at %p. Total %d bytes",
size, lastAddress, _bytesAllocated);
return lastAddress;
}
void ELFMemoryManager::deallocateFromHeap(void *ptr) {
Common::List<Allocation>::iterator i;
for (i = _allocList.begin(); i != _allocList.end(); i++) {
if (i->start == ptr) {
_bytesAllocated -= (*i).size;
debug(7, "ELFMemoryManager: freed %d bytes at %p. Total %d bytes",
(*i).size, (*i).start, _bytesAllocated);
_allocList.erase(i);
break;
}
}
}
#endif /* defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER) */

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/* 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/>.
*
*/
#ifndef ELF_MEMORY_MANAGER_H
#define ELF_MEMORY_MANAGER_H
#include "common/scummsys.h"
#if defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER)
#include "common/singleton.h"
#include "common/list.h"
#include "common/mutex.h"
/**
* A 'foolproof' way to prevent memory fragmentation. This class is used to
* serve as a permanent allocation to prevent the process of loading and
* unloading plugins from causing heavy fragmentation.
**/
#define ELFMemMan ELFMemoryManager::instance()
class ELFMemoryManager : public Common::Singleton<ELFMemoryManager> {
public:
void trackPlugin(bool value);
void trackAlloc(uint32 align, uint32 size);
void allocateHeap();
void *pluginAllocate(uint32 size);
void *pluginAllocate(uint32 align, uint32 size);
void pluginDeallocate(void *ptr);
private:
friend class Common::Singleton<ELFMemoryManager>;
ELFMemoryManager();
~ELFMemoryManager();
void *allocateOnHeap(uint32 align, uint32 size);
void deallocateFromHeap(void *ptr);
struct Allocation {
byte *start;
uint32 size;
byte *end() { return start + size; }
Allocation(byte *a, uint32 b) : start(a), size(b) {}
};
// heap
void *_heap;
uint32 _heapAlign; // alignment of the heap
uint32 _heapSize; // size of the heap
// tracking allocations
bool _trackAllocs; // whether we are currently tracking
uint32 _measuredSize;
uint32 _measuredAlign;
// real allocations
Common::List<Allocation> _allocList;
uint32 _bytesAllocated;
};
#endif /* defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER) */
#endif /* ELF_MEMORY_MANAGER_H */

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/* 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"
#if defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER) && defined(MIPS_TARGET)
#include "backends/plugins/elf/mips-loader.h"
#include "backends/plugins/elf/memory-manager.h"
#include "common/debug.h"
#define DEBUG_NUM 2
bool MIPSDLObject::relocate(Elf32_Off offset, Elf32_Word size, byte *relSegment) {
Elf32_Rel *rel = 0; // relocation entry
// Allocate memory for relocation table
if (!(rel = (Elf32_Rel *)malloc(size))) {
warning("elfloader: Could not allocate %d bytes for the relocation table", size);
return false;
}
// Read in our relocation table
if (!_file->seek(offset, SEEK_SET) || _file->read(rel, size) != size) {
warning("elfloader: Relocation table load failed.");
free(rel);
return false;
}
// Treat each relocation entry. Loop over all of them
uint32 cnt = size / sizeof(*rel);
debug(2, "elfloader: Loaded relocation table. %d entries. base address=%p", cnt, relSegment);
Elf32_Addr adjustedMainSegment = Elf32_Addr(_segment) - _segmentVMA; // adjust for VMA offset
bool seenHi16 = false; // For treating HI/LO16 commands
int32 firstHi16 = -1; // Mark the point of the first hi16 seen
Elf32_Addr ahl = 0; // Calculated addend
int32 a = 0; // Addend: taken from the target
uint32 *lastTarget = 0; // For processing hi16 when lo16 arrives
uint32 relocation = 0;
uint debugRelocs[10] = { 0 }; // For debugging
uint extendedHi16 = 0; // Count extended hi16 treatments
Elf32_Addr lastHiSymVal = 0;
bool hi16InShorts = false;
// Loop over relocation entries
for (uint32 i = 0; i < cnt; i++) {
// Get the symbol this relocation entry is referring to
Elf32_Sym *sym = _symtab + (REL_INDEX(rel[i].r_info));
// Get the target instruction in the code.
uint32 *target = (uint32 *)((byte *)relSegment + rel[i].r_offset);
uint32 origTarget = *target; // Save for debugging
// Act differently based on the type of relocation
switch (REL_TYPE(rel[i].r_info)) {
case R_MIPS_NONE:
break; // No relocation
case R_MIPS_HI16: // Absolute addressing.
if (sym->st_shndx < SHN_LOPROC && // Only shift for plugin section (ie. has a real section index)
firstHi16 < 0) { // Only process first in block of HI16s
firstHi16 = i; // Keep the first Hi16 we saw
seenHi16 = true;
ahl = (*target & 0xffff) << 16; // Take lower 16 bits shifted up
lastHiSymVal = sym->st_value;
hi16InShorts = ShortsMan.inGeneralSegment((char *)sym->st_value); // Fix for problem with switching btw segments
if (debugRelocs[0]++ < DEBUG_NUM) // Print only a set number
debug(8, "elfloader: R_MIPS_HI16: i=%d, offset=%x, ahl = %x, target = %x",
i, rel[i].r_offset, ahl, *target);
}
break;
case R_MIPS_LO16: // Absolute addressing. Needs a HI16 to come before it
if (sym->st_shndx < SHN_LOPROC) { // Only shift for plugin section. (ie. has a real section index)
if (!seenHi16) { // We MUST have seen HI16 first
debug(8, "elfloader: R_MIPS_LO16 w/o preceding R_MIPS_HI16 at relocation %d!", i);
free(rel);
return false;
}
// Fix: bug in gcc makes LO16s connect to wrong HI16s sometimes (shorts and regular segment)
// Note that we can check the entire shorts segment because the executable's shorts don't belong to this plugin section
// and will be screened out above
bool lo16InShorts = ShortsMan.inGeneralSegment((char *)sym->st_value);
// Correct the bug by getting the proper value in ahl (taken from the current symbol)
if ((hi16InShorts && !lo16InShorts) || (!hi16InShorts && lo16InShorts)) {
ahl -= (lastHiSymVal & 0xffff0000); // We assume gcc meant the same offset
ahl += (sym->st_value & 0xffff0000);
}
ahl &= 0xffff0000; // Clean lower 16 bits for repeated LO16s
a = *target & 0xffff; // Take lower 16 bits of the target
a = (a << 16) >> 16; // Sign extend them
ahl += a; // Add lower 16 bits. AHL is now complete
// Fix: we can have LO16 access to the short segment sometimes
if (lo16InShorts)
relocation = ahl + _shortsSegment->getOffset(); // Add in the short segment offset
else // It's in the regular segment
relocation = ahl + adjustedMainSegment; // Add in the new offset for the segment
if (firstHi16 >= 0) { // We haven't treated the HI16s yet so do it now
for (uint32 j = firstHi16; j < i; j++) {
if (REL_TYPE(rel[j].r_info) != R_MIPS_HI16)
continue; // Skip over non-Hi16s
lastTarget = (uint32 *)((char *)relSegment + rel[j].r_offset); // get hi16 target
*lastTarget &= 0xffff0000; // Clear the lower 16 bits of the last target
*lastTarget |= (relocation >> 16) & 0xffff; // Take the upper 16 bits of the relocation
if (relocation & 0x8000)
(*lastTarget)++; // Subtle: we need to add 1 to the HI16 in this case
}
firstHi16 = -1; // Reset so we'll know we treated it
} else {
extendedHi16++;
}
*target &= 0xffff0000; // Clear the lower 16 bits of current target
*target |= relocation & 0xffff; // Take the lower 16 bits of the relocation
if (debugRelocs[1]++ < DEBUG_NUM)
debug(8, "elfloader: R_MIPS_LO16: i=%d, offset=%x, a=%x, ahl = %x, "
"lastTarget = %x, origt = %x, target = %x",
i, rel[i].r_offset, a, ahl, *lastTarget, origTarget, *target);
if (lo16InShorts && debugRelocs[2]++ < DEBUG_NUM)
debug(8, "elfloader: R_MIPS_LO16s: i=%d, offset=%x, a=%x, ahl = %x, "
"lastTarget = %x, origt = %x, target = %x",
i, rel[i].r_offset, a, ahl, *lastTarget, origTarget, *target);
}
break;
case R_MIPS_26: // Absolute addressing (for jumps and branches only)
if (sym->st_shndx < SHN_LOPROC) { // Only relocate for main segment
a = *target & 0x03ffffff; // Get 26 bits' worth of the addend
a = (a << 6) >> 6; // Sign extend a
relocation = ((a << 2) + adjustedMainSegment) >> 2; // a already points to the target. Add our offset
*target &= 0xfc000000; // Clean lower 26 target bits
*target |= (relocation & 0x03ffffff);
if (debugRelocs[3]++ < DEBUG_NUM)
debug(8, "elfloader: R_MIPS_26: i=%d, offset=%x, symbol=%d, stinfo=%x, "
"a=%x, origTarget=%x, target=%x",
i, rel[i].r_offset, REL_INDEX(rel[i].r_info), sym->st_info, a, origTarget, *target);
} else {
if (debugRelocs[4]++ < DEBUG_NUM)
debug(8, "elfloader: R_MIPS_26: i=%d, offset=%x, symbol=%d, stinfo=%x, "
"a=%x, origTarget=%x, target=%x",
i, rel[i].r_offset, REL_INDEX(rel[i].r_info), sym->st_info, a, origTarget, *target);
}
break;
case R_MIPS_GPREL16: // GP Relative addressing
if (_shortsSegment->getOffset() != 0 && // Only relocate if we shift the shorts section
ShortsMan.inGeneralSegment((char *) sym->st_value)) { // Only relocate things in the plugin hole
a = *target & 0xffff; // Get 16 bits' worth of the addend
a = (a << 16) >> 16; // Sign extend it
relocation = a + _shortsSegment->getOffset();
*target &= 0xffff0000; // Clear the lower 16 bits of the target
*target |= relocation & 0xffff;
if (debugRelocs[5]++ < DEBUG_NUM)
debug(8, "elfloader: R_MIPS_GPREL16: i=%d, a=%x, gpVal=%x, origTarget=%x, "
"target=%x, offset=%x",
i, a, _gpVal, origTarget, *target, _shortsSegment->getOffset());
}
break;
case R_MIPS_32: // Absolute addressing
if (sym->st_shndx < SHN_LOPROC) { // Only shift for plugin section.
a = *target; // Get full 32 bits of addend
if (ShortsMan.inGeneralSegment((char *)sym->st_value)) // Check if we're in the shorts segment
relocation = a + _shortsSegment->getOffset(); // Shift by shorts offset
else // We're in the main section
relocation = a + adjustedMainSegment; // Shift by main offset
*target = relocation;
if (debugRelocs[6]++ < DEBUG_NUM)
debug(8, "elfloader: R_MIPS_32: i=%d, a=%x, origTarget=%x, target=%x",
i, a, origTarget, *target);
}
break;
default:
warning("elfloader: Unknown relocation type %x at relocation %d.", REL_TYPE(rel[i].r_info), i);
free(rel);
return false;
}
}
debug(2, "elfloader: Done with relocation. extendedHi16=%d", extendedHi16);
free(rel);
return true;
}
bool MIPSDLObject::relocateRels(Elf32_Ehdr *ehdr, Elf32_Shdr *shdr) {
// Loop over sections, finding relocation sections
for (uint32 i = 0; i < ehdr->e_shnum; i++) {
Elf32_Shdr *curShdr = &(shdr[i]);
//Elf32_Shdr *linkShdr = &(shdr[curShdr->sh_info]);
if (curShdr->sh_type == SHT_REL && // Check for a relocation section
curShdr->sh_entsize == sizeof(Elf32_Rel) && // Check for proper relocation size
int32(curShdr->sh_link) == _symtab_sect && // Check that the sh_link connects to our symbol table
curShdr->sh_info < ehdr->e_shnum && // Check that the relocated section exists
(shdr[curShdr->sh_info].sh_flags & SHF_ALLOC)) { // Check if relocated section resides in memory
if (!ShortsMan.inGeneralSegment((char *)shdr[curShdr->sh_info].sh_addr)) { // regular segment
if (!relocate(curShdr->sh_offset, curShdr->sh_size, _segment - _segmentVMA))
return false;
} else { // In Shorts segment
if (!relocate(curShdr->sh_offset, curShdr->sh_size, (byte *)_shortsSegment->getOffset()))
return false;
}
}
}
return true;
}
void MIPSDLObject::relocateSymbols(ptrdiff_t offset) {
// Loop over symbols, add relocation offset
Elf32_Sym *s = _symtab;
for (uint32 c = _symbol_cnt; c--; s++) {
// Make sure we don't relocate special valued symbols
if (s->st_shndx < SHN_LOPROC) {
if (!ShortsMan.inGeneralSegment((char *)s->st_value)) {
if (s->st_value < _segmentVMA)
s->st_value = _segmentVMA; // deal with symbols referring to sections, which start before the VMA
s->st_value += offset;
if (s->st_value < Elf32_Addr(_segment) || s->st_value > Elf32_Addr(_segment) + _segmentSize)
warning("elfloader: Symbol out of bounds! st_value = %x", s->st_value);
} else { // shorts section
s->st_value += _shortsSegment->getOffset();
if (!_shortsSegment->inSegment((char *)s->st_value))
warning("elfloader: Symbol out of bounds! st_value = %x", s->st_value);
}
}
}
}
bool MIPSDLObject::loadSegment(Elf32_Phdr *phdr) {
byte *baseAddress = 0;
// We need to take account of non-allocated segment for shorts
if (phdr->p_flags & PF_X) { // This is a relocated segment
// Attempt to allocate memory for segment
_segment = (byte *)allocateMemory(phdr->p_align, phdr->p_memsz);
if (!_segment) {
warning("elfloader: Out of memory.");
return false;
}
debug(2, "elfloader: Allocated segment @ %p", _segment);
// Get offset to load segment into
baseAddress = _segment;
_segmentSize = phdr->p_memsz;
_segmentVMA = phdr->p_vaddr;
} else { // This is a shorts section.
_shortsSegment = ShortsMan.newSegment(phdr->p_memsz, (char *)phdr->p_vaddr);
baseAddress = (byte *)_shortsSegment->getStart();
debug(2, "elfloader: Shorts segment @ %p to %p. Segment wants to be at %x. Offset=%x",
_shortsSegment->getStart(), _shortsSegment->getEnd(), phdr->p_vaddr,
_shortsSegment->getOffset());
}
// Set .sbss segment to 0 if necessary
if (phdr->p_memsz > phdr->p_filesz) {
debug(2, "elfloader: Setting %p to %p to 0 for bss", baseAddress + phdr->p_filesz,
baseAddress + phdr->p_memsz);
memset(baseAddress + phdr->p_filesz, 0, phdr->p_memsz - phdr->p_filesz);
}
debug(2, "elfloader: Reading the segment into memory");
// Read the segment into memory
if (!_file->seek(phdr->p_offset, SEEK_SET) ||
_file->read(baseAddress, phdr->p_filesz) != phdr->p_filesz) {
warning("elfloader: Segment load failed.");
return false;
}
debug(2, "elfloader: Segment has been read into memory");
return true;
}
// Unload all objects from memory
void MIPSDLObject::unload() {
DLObject::unload();
freeShortsSegment();
}
void MIPSDLObject::freeShortsSegment() {
if (_shortsSegment) {
ShortsMan.deleteSegment(_shortsSegment);
_shortsSegment = 0;
}
}
#endif /* defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER) && defined(MIPS_TARGET) */

59
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/* 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/>.
*
*/
#ifndef BACKENDS_PLUGINS_MIPS_LOADER_H
#define BACKENDS_PLUGINS_MIPS_LOADER_H
#include "common/scummsys.h"
#if defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER) && defined(MIPS_TARGET)
#include "backends/plugins/elf/elf-loader.h"
#include "backends/plugins/elf/shorts-segment-manager.h"
class MIPSDLObject : public DLObject {
protected:
ShortSegmentManager::Segment *_shortsSegment; // For assigning shorts ranges
uint32 _gpVal; // Value of Global Pointer
virtual bool relocate(Elf32_Off offset, Elf32_Word size, byte *relSegment);
virtual bool relocateRels(Elf32_Ehdr *ehdr, Elf32_Shdr *shdr);
virtual void relocateSymbols(ptrdiff_t offset);
virtual bool loadSegment(Elf32_Phdr *phdr);
virtual void unload();
void freeShortsSegment();
public:
MIPSDLObject() :
DLObject() {
_shortsSegment = NULL;
_gpVal = 0;
}
~MIPSDLObject() {
freeShortsSegment();
}
};
#endif /* defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER) && defined(MIPS_TARGET) */
#endif /* BACKENDS_PLUGINS_MIPS_LOADER_H */

10
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PLUGIN_getBuildDate
PLUGIN_getVersion
PLUGIN_getType
PLUGIN_getTypeVersion
PLUGIN_getObject
___plugin_ctors
___plugin_ctors_end
___plugin_dtors
___plugin_dtors_end
__dso_handle

127
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/* 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"
#if defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER) && defined(PPC_TARGET)
#include "backends/plugins/elf/elf-loader.h"
#include "backends/plugins/elf/ppc-loader.h"
#include "common/debug.h"
bool PPCDLObject::relocate(Elf32_Off offset, Elf32_Word size, byte *relSegment) {
Elf32_Rela *rel = NULL;
if (!(rel = (Elf32_Rela *)malloc(size))) {
warning("elfloader: Could not allocate %d bytes for the relocation table", size);
return false;
}
if (!_file->seek(offset, SEEK_SET) || _file->read(rel, size) != size) {
warning("elfloader: Relocation table load failed.");
free(rel);
return false;
}
uint32 cnt = size / sizeof(*rel);
debug(2, "elfloader: Loaded relocation table. %d entries. base address=%p", cnt, relSegment);
uint32 *src;
uint32 value;
for (uint32 i = 0; i < cnt; i++) {
// Get the symbol this relocation entry is referring to
Elf32_Sym *sym = _symtab + (REL_INDEX(rel[i].r_info));
// Get the target instruction in the code
src = (uint32 *)((char *)relSegment + rel[i].r_offset - _segmentVMA);
value = sym->st_value + rel[i].r_addend;
//debug(8, "elfloader: i=%05d %p +0x%04x: (0x%08x) 0x%08x ", i, src, rel[i].r_addend, sym->st_value, *src);
switch (REL_TYPE(rel[i].r_info)) {
case R_PPC_NONE:
debug(8, "elfloader: R_PPC_NONE");
break;
case R_PPC_ADDR32:
*src = value;
debug(8, "elfloader: R_PPC_ADDR32 -> 0x%08x", *src);
break;
case R_PPC_ADDR16_LO:
*(uint16 *)src = value;
debug(8, "elfloader: R_PPC_ADDR16_LO -> 0x%08x", *src);
break;
case R_PPC_ADDR16_HI:
*(uint16 *)src = value >> 16;
debug(8, "elfloader: R_PPC_ADDR16_HA -> 0x%08x", *src);
break;
case R_PPC_ADDR16_HA:
*(uint16 *)src = (value + 0x8000) >> 16;
debug(8, "elfloader: R_PPC_ADDR16_HA -> 0x%08x", *src);
break;
case R_PPC_REL24:
*src = (*src & ~0x03fffffc) | ((value - (uint32)src) & 0x03fffffc);
debug(8, "elfloader: R_PPC_REL24 -> 0x%08x", *src);
break;
case R_PPC_REL32:
*src = value - (uint32)src;
debug(8, "elfloader: R_PPC_REL32 -> 0x%08x", *src);
break;
default:
warning("elfloader: Unknown relocation type %d", REL_TYPE(rel[i].r_info));
free(rel);
return false;
}
}
free(rel);
return true;
}
bool PPCDLObject::relocateRels(Elf32_Ehdr *ehdr, Elf32_Shdr *shdr) {
for (uint32 i = 0; i < ehdr->e_shnum; i++) {
Elf32_Shdr *curShdr = &(shdr[i]);
if ((curShdr->sh_type == SHT_REL) &&
curShdr->sh_entsize == sizeof(Elf32_Rel) &&
int32(curShdr->sh_link) == _symtab_sect &&
curShdr->sh_info < ehdr->e_shnum &&
(shdr[curShdr->sh_info].sh_flags & SHF_ALLOC)) {
warning("elfloader: REL entries not supported!");
return false;
}
if ((curShdr->sh_type == SHT_RELA) &&
curShdr->sh_entsize == sizeof(Elf32_Rela) &&
int32(curShdr->sh_link) == _symtab_sect &&
curShdr->sh_info < ehdr->e_shnum &&
(shdr[curShdr->sh_info].sh_flags & SHF_ALLOC)) {
if (!relocate(curShdr->sh_offset, curShdr->sh_size, _segment))
return false;
}
}
return true;
}
#endif /* defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER) && defined(PPC_TARGET) */

39
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/* 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/>.
*
*/
#ifndef BACKENDS_PLUGINS_PPC_LOADER_H
#define BACKENDS_PLUGINS_PPC_LOADER_H
#include "common/scummsys.h"
#if defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER) && defined(PPC_TARGET)
#include "backends/plugins/elf/elf-loader.h"
class PPCDLObject : public DLObject {
protected:
virtual bool relocate(Elf32_Off offset, Elf32_Word size, byte *relSegment);
virtual bool relocateRels(Elf32_Ehdr *ehdr, Elf32_Shdr *shdr);
};
#endif /* defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER) && defined(PPC_TARGET) */
#endif /* BACKENDS_PLUGINS_PPC_LOADER_H */

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/* 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"
#if defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER) && defined(MIPS_TARGET)
#include "backends/plugins/elf/shorts-segment-manager.h"
#include "common/debug.h"
#include "common/textconsole.h"
extern char __plugin_hole_start; // Indicates start of hole in program file for shorts
extern char __plugin_hole_end; // Indicates end of hole in program file
extern char _gp[]; // Value of gp register
namespace Common {
DECLARE_SINGLETON(ShortSegmentManager); // For singleton
}
ShortSegmentManager::ShortSegmentManager() {
_shortsStart = &__plugin_hole_start ; //shorts segment begins at the plugin hole we made when linking
_shortsEnd = &__plugin_hole_end; //and ends at the end of that hole.
}
ShortSegmentManager::Segment *ShortSegmentManager::newSegment(uint32 size, char *origAddr) {
char *lastAddress = origAddr;
Common::List<Segment *>::iterator i;
// Find a block that fits, starting from the beginning
for (i = _list.begin(); i != _list.end(); ++i) {
char *currAddress = (*i)->getStart();
if (uint32(currAddress) - uint32(lastAddress) >= size)
break;
lastAddress = (*i)->getEnd();
}
if ((Elf32_Addr)lastAddress & 3)
lastAddress += 4 - ((Elf32_Addr)lastAddress & 3); // Round up to multiple of 4
if (lastAddress + size > _shortsEnd) {
warning("elfloader: No space in shorts segment for %x bytes. Last address is %p, max address is %p.",
size, lastAddress, _shortsEnd);
return 0;
}
Segment *seg = new Segment(lastAddress, size, origAddr); // Create a new segment
if (lastAddress + size > _highestAddress)
_highestAddress = lastAddress + size; // Keep track of maximum
_list.insert(i, seg);
debug(2, "elfloader: Shorts segment size %x allocated. End = %p. Remaining space = %x. Highest so far is %p.",
size, lastAddress + size, _shortsEnd - _list.back()->getEnd(), _highestAddress);
return seg;
}
void ShortSegmentManager::deleteSegment(ShortSegmentManager::Segment *seg) {
debug(2, "elfloader: Deleting shorts segment from %p to %p.", seg->getStart(), seg->getEnd());
_list.remove(seg);
delete seg;
}
#endif // defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER) && defined(MIPS_TARGET)

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/* 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/>.
*
*/
#ifndef SHORTS_SEGMENT_MANAGER_H
#define SHORTS_SEGMENT_MANAGER_H
#include "common/scummsys.h"
#if defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER) && defined(MIPS_TARGET)
#include "backends/plugins/elf/elf32.h"
#include "common/singleton.h"
#include "common/list.h"
#define ShortsMan ShortSegmentManager::instance()
/**
* ShortSegmentManager
*
* Since MIPS is limited to 32 bits per instruction, loading data that's further away than 16 bits
* takes several instructions. Thus, small global data (which is likely to be accessed a lot from
* multiple locations) is often put into a GP-relative area (GP standing for the global pointer register)
* in MIPS processors. This class manages these segments of small global data, and is used by the
* member functions of MIPSDLObject, which query in information from this manager in order to deal with
* this segment during the loading/unloading of plugins.
*
* Since there's no true dynamic linker to change the GP register between plugins and the main engine,
* custom ld linker scripts for both the main executable and the plugins ensure the GP-area is in the
* same place for both. The ShortSegmentManager accesses this place via the symbols __plugin_hole_start
* and __plugin_hole_end, which are defined in those custom ld linker scripts.
*/
class ShortSegmentManager : public Common::Singleton<ShortSegmentManager> {
private:
char *_shortsStart;
char *_shortsEnd;
public:
char *getShortsStart() {
return _shortsStart;
}
// Returns whether or not an absolute address is in the GP-relative section.
bool inGeneralSegment(char *addr) {
return (addr >= _shortsStart && addr < _shortsEnd);
}
class Segment {
private:
friend class ShortSegmentManager;
Segment(char *start, uint32 size, char *origAddr) :
_startAddress(start),
_size(size),
_origAddress(origAddr) {
}
virtual ~Segment() {
}
char *_startAddress; // Start of shorts segment in memory
uint32 _size; // Size of shorts segment
char *_origAddress; // Original address this segment was supposed to be at
public:
char *getStart() {
return _startAddress;
}
char *getEnd() {
return (_startAddress + _size);
}
Elf32_Addr getOffset() {
return (Elf32_Addr)(_startAddress - _origAddress);
}
bool inSegment(char *addr) {
return (addr >= _startAddress && addr <= _startAddress + _size);
}
};
Segment *newSegment(uint32 size, char *origAddr);
void deleteSegment(Segment *);
private:
ShortSegmentManager();
friend class Common::Singleton<ShortSegmentManager>;
Common::List<Segment *> _list;
char *_highestAddress;
};
#endif // defined(DYNAMIC_MODULES) && defined(USE_ELF_LOADER) && defined(MIPS_TARGET)
#endif /* SHORTS_SEGMENT_MANAGER_H */

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/* 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 "backends/plugins/elf/version.h"
#ifdef USE_ELF_LOADER
const char *gScummVMPluginBuildDate __attribute__((visibility("hidden"))) =
__DATE__ " " __TIME__;
#endif

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/* 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/>.
*
*/
#ifndef BACKENDS_PLUGINS_ELF_VERSION_H
#define BACKENDS_PLUGINS_ELF_VERSION_H
#include "common/scummsys.h"
#ifdef USE_ELF_LOADER
extern const char *gScummVMPluginBuildDate;
#endif
#endif

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/* 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/>.
*
*/
#define FORBIDDEN_SYMBOL_ALLOW_ALL
#include "common/scummsys.h"
#if defined(DYNAMIC_MODULES)
#include "backends/platform/sdl/kolibrios/kolibrios.h"
#include "backends/plugins/kolibrios/kolibrios-provider.h"
#include "backends/plugins/dynamic-plugin.h"
#include "common/debug.h"
#include <errno.h>
extern "C" {
void* get_proc_address(void *handle, const char *proc_name);
void* load_library(const char *name);
}
class KolibriOSPlugin final : public DynamicPlugin {
protected:
void *_dlHandle;
VoidFunc findSymbol(const char *symbol) override {
void *func = get_proc_address(_dlHandle, symbol);
if (!func)
debug("Failed loading symbol '%s' from plugin '%s'", symbol, _filename.c_str());
return (void (*)())func;
}
public:
KolibriOSPlugin(const Common::Path &filename)
: DynamicPlugin(filename), _dlHandle(0) {}
bool loadPlugin() override {
if (_dlHandle)
return true;
_dlHandle = load_library(_filename.toString(Common::Path::kNativeSeparator).c_str());
if (!_dlHandle) {
debug("Failed loading plugin '%s' (error code %d)", _filename.toString(Common::Path::kNativeSeparator).c_str(), errno);
return false;
} else {
debug(1, "Success loading plugin '%s', handle %p", _filename.toString(Common::Path::kNativeSeparator).c_str(), _dlHandle);
}
return DynamicPlugin::loadPlugin();
}
void unloadPlugin() override {
DynamicPlugin::unloadPlugin();
/* Not supported */
}
};
Plugin* KolibriOSPluginProvider::createPlugin(const Common::FSNode &node) const {
return new KolibriOSPlugin(node.getPath());
}
void KolibriOSPluginProvider::addCustomDirectories(Common::FSList &dirs) const {
OSystem_KolibriOS *sys = dynamic_cast<OSystem_KolibriOS *>(g_system);
// load_library doesn't handle relative paths correctly so remove all other paths which are relative
dirs.clear();
if (sys) {
debug(1, "Adding path %s", sys->getExePath().join("plugins").toString().c_str());
dirs.push_back(Common::FSNode(sys->getExePath().join("plugins")));
}
}
#endif // defined(DYNAMIC_MODULES)

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/* 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/>.
*
*/
#if defined(DYNAMIC_MODULES)
#ifndef BACKENDS_PLUGINS_KOLIBRIOS_PROVIDER_H
#define BACKENDS_PLUGINS_KOLIBRIOS_PROVIDER_H
#include "base/plugins.h"
class KolibriOSPluginProvider : public FilePluginProvider {
public:
Plugin *createPlugin(const Common::FSNode &node) const override;
void addCustomDirectories(Common::FSList &dirs) const override;
};
#endif // BACKENDS_PLUGINS_KOLIBRIOS_PROVIDER_H
#endif // defined(DYNAMIC_MODULES)

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/* 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"
#if defined(DYNAMIC_MODULES) && defined(POSIX) && !defined(__3DS__)
#include "backends/plugins/posix/posix-provider.h"
#include "backends/plugins/dynamic-plugin.h"
#include "common/fs.h"
#include <dlfcn.h>
class POSIXPlugin : public DynamicPlugin {
protected:
void *_dlHandle;
virtual VoidFunc findSymbol(const char *symbol) {
void *func = dlsym(_dlHandle, symbol);
if (!func)
warning("Failed loading symbol '%s' from plugin '%s' (%s)", symbol, _filename.toString(Common::Path::kNativeSeparator).c_str(), dlerror());
// FIXME HACK: This is a HACK to circumvent a clash between the ISO C++
// standard and POSIX: ISO C++ disallows casting between function pointers
// and data pointers, but dlsym always returns a void pointer. For details,
// see e.g. <https://web.archive.org/web/20061205092618/http://www.trilithium.com/johan/2004/12/problem-with-dlsym/>.
assert(sizeof(VoidFunc) == sizeof(func));
VoidFunc tmp;
memcpy(&tmp, &func, sizeof(VoidFunc));
return tmp;
}
public:
POSIXPlugin(const Common::Path &filename)
: DynamicPlugin(filename), _dlHandle(0) {}
bool loadPlugin() {
assert(!_dlHandle);
_dlHandle = dlopen(_filename.toString(Common::Path::kNativeSeparator).c_str(), RTLD_LAZY);
if (!_dlHandle) {
warning("Failed loading plugin '%s' (%s)", _filename.toString(Common::Path::kNativeSeparator).c_str(), dlerror());
return false;
}
return DynamicPlugin::loadPlugin();
}
void unloadPlugin() {
DynamicPlugin::unloadPlugin();
if (_dlHandle) {
if (dlclose(_dlHandle) != 0)
warning("Failed unloading plugin '%s' (%s)", _filename.toString(Common::Path::kNativeSeparator).c_str(), dlerror());
_dlHandle = 0;
}
}
};
Plugin *POSIXPluginProvider::createPlugin(const Common::FSNode &node) const {
return new POSIXPlugin(node.getPath());
}
#endif // defined(DYNAMIC_MODULES) && defined(POSIX)

36
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/* 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/>.
*
*/
#ifndef BACKENDS_PLUGINS_POSIX_H
#define BACKENDS_PLUGINS_POSIX_H
#include "base/plugins.h"
#if defined(DYNAMIC_MODULES) && defined(POSIX)
class POSIXPluginProvider : public FilePluginProvider {
protected:
Plugin *createPlugin(const Common::FSNode &node) const;
};
#endif // defined(DYNAMIC_MODULES) && defined(POSIX)
#endif

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OUTPUT_FORMAT("elf32-littlemips", "elf32-bigmips",
"elf32-littlemips")
OUTPUT_ARCH(mips:allegrex)
ENTRY(_start)
/* Do we need any of these for elf?
__DYNAMIC = 0; */
SECTIONS
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/* PSP-specific relocations. */
.rel.sceStub.text : { *(.rel.sceStub.text) *(SORT(.rel.sceStub.text.*)) }
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.init :
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/* DWARF 1.1 and DWARF 2 */
.debug_aranges 0 : { *(.debug_aranges) }
.debug_pubnames 0 : { *(.debug_pubnames) }
/* DWARF 2 */
.debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) }
.debug_abbrev 0 : { *(.debug_abbrev) }
.debug_line 0 : { *(.debug_line) }
.debug_frame 0 : { *(.debug_frame) }
.debug_str 0 : { *(.debug_str) }
.debug_loc 0 : { *(.debug_loc) }
.debug_macinfo 0 : { *(.debug_macinfo) }
/* SGI/MIPS DWARF 2 extensions */
.debug_weaknames 0 : { *(.debug_weaknames) }
.debug_funcnames 0 : { *(.debug_funcnames) }
.debug_typenames 0 : { *(.debug_typenames) }
.debug_varnames 0 : { *(.debug_varnames) }
/DISCARD/ : { *(.comment) *(.pdr) }
/DISCARD/ : { *(.note.GNU-stack) }
}

238
backends/plugins/psp/plugin.ld Normal file
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@@ -0,0 +1,238 @@
OUTPUT_FORMAT("elf32-littlemips", "elf32-bigmips", "elf32-littlemips")
OUTPUT_ARCH(mips:allegrex)
PHDRS
{
plugin PT_LOAD ;
shorts PT_LOAD ;
}
/* Do we need any of these for elf?
__DYNAMIC = 0; */
SECTIONS
{
/* Read-only sections, merged into text segment: */
. = 0;
.interp : { *(.interp) } : plugin
.reginfo : { *(.reginfo) } : plugin
.dynamic : { *(.dynamic) }
.hash : { *(.hash) }
.dynsym : { *(.dynsym) }
.dynstr : { *(.dynstr) }
.gnu.version : { *(.gnu.version) }
.gnu.version_d : { *(.gnu.version_d) }
.gnu.version_r : { *(.gnu.version_r) }
.rel.init : { *(.rel.init) }
.rela.init : { *(.rela.init) }
.rel.text : { *(.rel.text .rel.text.* .rel.gnu.linkonce.t.*) }
.rela.text : { *(.rela.text .rela.text.* .rela.gnu.linkonce.t.*) }
.rel.fini : { *(.rel.fini) }
.rela.fini : { *(.rela.fini) }
/* PSP-specific relocations. */
.rel.sceStub.text : { *(.rel.sceStub.text) *(SORT(.rel.sceStub.text.*)) }
.rel.lib.ent.top : { *(.rel.lib.ent.top) }
.rel.lib.ent : { *(.rel.lib.ent) }
.rel.lib.ent.btm : { *(.rel.lib.ent.btm) }
.rel.lib.stub.top : { *(.rel.lib.stub.top) }
.rel.lib.stub : { *(.rel.lib.stub) }
.rel.lib.stub.btm : { *(.rel.lib.stub.btm) }
.rel.rodata.sceModuleInfo : { *(.rel.rodata.sceModuleInfo) }
.rel.rodata.sceResident : { *(.rel.rodata.sceResident) }
.rel.rodata.sceNid : { *(.rel.rodata.sceNid) }
.rel.rodata.sceVstub : { *(.rel.rodata.sceVstub) *(SORT(.rel.rodata.sceVstub.*)) }
.rel.rodata : { *(.rel.rodata .rel.rodata.* .rel.gnu.linkonce.r.*) }
.rela.rodata : { *(.rela.rodata .rela.rodata.* .rela.gnu.linkonce.r.*) }
.rel.data.rel.ro : { *(.rel.data.rel.ro*) }
.rela.data.rel.ro : { *(.rel.data.rel.ro*) }
.rel.data : { *(.rel.data .rel.data.* .rel.gnu.linkonce.d.*) }
.rela.data : { *(.rela.data .rela.data.* .rela.gnu.linkonce.d.*) }
.rel.tdata : { *(.rel.tdata .rel.tdata.* .rel.gnu.linkonce.td.*) }
.rela.tdata : { *(.rela.tdata .rela.tdata.* .rela.gnu.linkonce.td.*) }
.rel.tbss : { *(.rel.tbss .rel.tbss.* .rel.gnu.linkonce.tb.*) }
.rela.tbss : { *(.rela.tbss .rela.tbss.* .rela.gnu.linkonce.tb.*) }
.rel.ctors : { *(.rel.ctors) }
.rela.ctors : { *(.rela.ctors) }
.rel.dtors : { *(.rel.dtors) }
.rela.dtors : { *(.rela.dtors) }
.rel.got : { *(.rel.got) }
.rela.got : { *(.rela.got) }
.rel.sdata : { *(.rel.sdata .rel.sdata.* .rel.gnu.linkonce.s.*) }
.rela.sdata : { *(.rela.sdata .rela.sdata.* .rela.gnu.linkonce.s.*) }
.rel.sbss : { *(.rel.sbss .rel.sbss.* .rel.gnu.linkonce.sb.*) }
.rela.sbss : { *(.rela.sbss .rela.sbss.* .rela.gnu.linkonce.sb.*) }
.rel.sdata2 : { *(.rel.sdata2 .rel.sdata2.* .rel.gnu.linkonce.s2.*) }
.rela.sdata2 : { *(.rela.sdata2 .rela.sdata2.* .rela.gnu.linkonce.s2.*) }
.rel.sbss2 : { *(.rel.sbss2 .rel.sbss2.* .rel.gnu.linkonce.sb2.*) }
.rela.sbss2 : { *(.rela.sbss2 .rela.sbss2.* .rela.gnu.linkonce.sb2.*) }
.rel.bss : { *(.rel.bss .rel.bss.* .rel.gnu.linkonce.b.*) }
.rela.bss : { *(.rela.bss .rela.bss.* .rela.gnu.linkonce.b.*) }
.rel.plt : { *(.rel.plt) }
.rela.plt : { *(.rela.plt) }
.init :
{
KEEP (*(.init))
} =0
.plt : { *(.plt) }
.text :
{
_ftext = . ;
*(.text .stub .text.* .gnu.linkonce.t.*)
KEEP (*(.text.*personality*))
/* .gnu.warning sections are handled specially by elf32.em. */
*(.gnu.warning)
*(.mips16.fn.*) *(.mips16.call.*)
} =0
.fini :
{
KEEP (*(.fini))
} =0
/* PSP library stub functions. */
.sceStub.text : { *(.sceStub.text) *(SORT(.sceStub.text.*)) }
PROVIDE (__etext = .);
PROVIDE (_etext = .);
PROVIDE (etext = .);
/* PSP library entry table and library stub table. */
.lib.ent.top : { *(.lib.ent.top) }
.lib.ent : { *(.lib.ent) }
.lib.ent.btm : { *(.lib.ent.btm) }
.lib.stub.top : { *(.lib.stub.top) }
.lib.stub : { *(.lib.stub) }
.lib.stub.btm : { *(.lib.stub.btm) }
/* PSP read-only data for module info, NIDs, and Vstubs. The
.rodata.sceModuleInfo section must appear before the .rodata section
otherwise it would get absorbed into .rodata and the PSP bootloader
would be unable to locate the module info structure. */
.rodata.sceModuleInfo : { *(.rodata.sceModuleInfo) }
.rodata.sceResident : { *(.rodata.sceResident) }
.rodata.sceNid : { *(.rodata.sceNid) }
.rodata.sceVstub : { *(.rodata.sceVstub) *(SORT(.rodata.sceVstub.*)) }
.rodata : { *(.rodata .rodata.* .gnu.linkonce.r.*) }
.rodata1 : { *(.rodata1) }
.sdata2 : { *(.sdata2 .sdata2.* .gnu.linkonce.s2.*) }
.sbss2 : { *(.sbss2 .sbss2.* .gnu.linkonce.sb2.*) }
.eh_frame_hdr : { *(.eh_frame_hdr) }
.eh_frame : ONLY_IF_RO { KEEP (*(.eh_frame)) }
.gcc_except_table : ONLY_IF_RO { KEEP (*(.gcc_except_table)) *(.gcc_except_table.*) }
/* Adjust the address for the data segment. We want to adjust up to
the same address within the page on the next page up. */
. = ALIGN(256) + (. & (256 - 1));
/* Exception handling */
.eh_frame : ONLY_IF_RW { KEEP (*(.eh_frame)) }
.gcc_except_table : ONLY_IF_RW { KEEP (*(.gcc_except_table)) *(.gcc_except_table.*) }
/* Thread Local Storage sections */
.tdata : { *(.tdata .tdata.* .gnu.linkonce.td.*) }
.tbss : { *(.tbss .tbss.* .gnu.linkonce.tb.*) *(.tcommon) }
/* Ensure the __preinit_array_start label is properly aligned. We
could instead move the label definition inside the section, but
the linker would then create the section even if it turns out to
be empty, which isn't pretty. */
. = ALIGN(32 / 8);
PROVIDE (__preinit_array_start = .);
.preinit_array : { KEEP (*(.preinit_array)) }
PROVIDE (__preinit_array_end = .);
PROVIDE (__init_array_start = .);
.init_array : { KEEP (*(.init_array)) }
PROVIDE (__init_array_end = .);
PROVIDE (__fini_array_start = .);
.fini_array : { KEEP (*(.fini_array)) }
PROVIDE (__fini_array_end = .);
.ctors :
{
___plugin_ctors = .;
KEEP (*(SORT(.ctors.*)))
KEEP (*(.ctors))
___plugin_ctors_end = .;
}
.dtors :
{
___plugin_dtors = .;
KEEP (*(SORT(.dtors.*)))
KEEP (*(.dtors))
___plugin_dtors_end = .;
}
.jcr : { KEEP (*(.jcr)) }
.data.rel.ro : { *(.data.rel.ro.local) *(.data.rel.ro*) }
.data :
{
_fdata = . ;
*(.data .data.* .gnu.linkonce.d.*)
KEEP (*(.gnu.linkonce.d.*personality*))
SORT(CONSTRUCTORS)
}
.data1 : { *(.data1) }
. = .;
.bss :
{
*(.dynbss)
*(.bss .bss.* .gnu.linkonce.b.*)
*(COMMON)
/* Align here to ensure that the .bss section occupies space up to
_end. Align after .bss to ensure correct alignment even if the
.bss section disappears because there are no input sections. */
. = ALIGN(32 / 8);
}
. = ALIGN(32 / 8);
_end = .;
PROVIDE (end = .);
/* Stabs debugging sections. */
.stab 0 : { *(.stab) }
.stabstr 0 : { *(.stabstr) }
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.stab.index 0 : { *(.stab.index) }
.stab.indexstr 0 : { *(.stab.indexstr) }
.comment 0 : { *(.comment) }
/* DWARF debug sections.
Symbols in the DWARF debugging sections are relative to the beginning
of the section so we begin them at 0. */
/* DWARF 1 */
.debug 0 : { *(.debug) }
.line 0 : { *(.line) }
/* GNU DWARF 1 extensions */
.debug_srcinfo 0 : { *(.debug_srcinfo) }
.debug_sfnames 0 : { *(.debug_sfnames) }
/* DWARF 1.1 and DWARF 2 */
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/* SGI/MIPS DWARF 2 extensions */
.debug_weaknames 0 : { *(.debug_weaknames) }
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/DISCARD/ : { *(.comment) *(.pdr) }
/DISCARD/ : { *(.note.GNU-stack) *(.MIPS.abiflags*) }
. = __plugin_hole_start;
.got : { *(.got.plt) *(.got) } : shorts
/* We want the small data sections together, so single-instruction offsets
can access them all, and initialized data all before uninitialized, so
we can shorten the on-disk segment size. */
.sdata :
{
*(.sdata .sdata.* .gnu.linkonce.s.*)
}
.lit8 : { *(.lit8) }
.lit4 : { *(.lit4) }
_edata = .;
PROVIDE (edata = .);
__bss_start = .;
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{
PROVIDE (__sbss_start = .);
PROVIDE (___sbss_start = .);
*(.dynsbss)
*(.sbss .sbss.* .gnu.linkonce.sb.*)
*(.scommon)
PROVIDE (__sbss_end = .);
PROVIDE (___sbss_end = .);
}
}

45
backends/plugins/psp/psp-provider.cpp Normal file
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@@ -0,0 +1,45 @@
/* 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/>.
*
*/
#define FORBIDDEN_SYMBOL_EXCEPTION_time_h
#include "common/scummsys.h"
#if defined(DYNAMIC_MODULES) && defined(__PSP__)
#include <psputils.h>
#include <psputilsforkernel.h>
#include "backends/plugins/psp/psp-provider.h"
#include "backends/plugins/elf/mips-loader.h"
class PSPDLObject : public MIPSDLObject {
protected:
virtual void flushDataCache(void *ptr, uint32 len) const {
sceKernelDcacheWritebackRange(ptr, len);
sceKernelIcacheInvalidateRange(ptr, len);
}
};
Plugin *PSPPluginProvider::createPlugin(const Common::FSNode &node) const {
return new TemplatedELFPlugin<PSPDLObject>(node.getPath());
}
#endif // defined(DYNAMIC_MODULES) && defined(__PSP__)

36
backends/plugins/psp/psp-provider.h Normal file
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@@ -0,0 +1,36 @@
/* 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/>.
*
*/
#if defined(DYNAMIC_MODULES) && defined(__PSP__)
#ifndef BACKENDS_PLUGINS_PSP_PSP_PROVIDER_H
#define BACKENDS_PLUGINS_PSP_PSP_PROVIDER_H
#include "backends/plugins/elf/elf-provider.h"
class PSPPluginProvider : public ELFPluginProvider {
public:
Plugin *createPlugin(const Common::FSNode &node) const;
};
#endif // BACKENDS_PLUGINS_PSP_PROVIDER_H
#endif // defined(DYNAMIC_MODULES) && defined(__PSP__)

113
backends/plugins/psp2/plugin.cpp Normal file
View File

@@ -0,0 +1,113 @@
/* 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/>.
*
*/
// Disable symbol overrides so that we can use system headers.
#define FORBIDDEN_SYMBOL_ALLOW_ALL
#include "common/scummsys.h"
#if defined(DYNAMIC_MODULES) && defined(PSP2)
#include <cxxabi.h>
#include <psp2/kernel/modulemgr.h>
#include "base/plugins.h"
#include "backends/plugins/psp2/psp2-plugin.h"
extern "C" {
int32 PLUGIN_getVersion();
int32 PLUGIN_getType();
int32 PLUGIN_getTypeVersion();
PluginObject *PLUGIN_getObject();
static PSP2FunctionPointers PSP2Functions = {
PSP2FunctionPointers_VERSION,
PLUGIN_getVersion,
PLUGIN_getType,
PLUGIN_getTypeVersion,
PLUGIN_getObject,
};
// hacks to make libc work
//void* __dso_handle = (void*) &__dso_handle;
extern void *__dso_handle __attribute__((weak));
/* These magic symbols are provided by the linker. */
extern void (*__preinit_array_start []) (void) __attribute__((weak));
extern void (*__preinit_array_end []) (void) __attribute__((weak));
extern void (*__init_array_start []) (void) __attribute__((weak));
extern void (*__init_array_end []) (void) __attribute__((weak));
extern void (*__fini_array_start [])(void) __attribute__((weak));
extern void (*__fini_array_end [])(void) __attribute__((weak));
static void __libc_init_array(void) {
size_t count, i;
count = __preinit_array_end - __preinit_array_start;
for (i = 0; i < count; i++) {
__preinit_array_start[i]();
}
count = __init_array_end - __init_array_start;
for (i = 0; i < count; i++) {
__init_array_start[i]();
}
}
static void __libc_fini_array(void) {
size_t count, i;
count = __fini_array_end - __fini_array_start;
for (i = count; i > 0; i--) {
__fini_array_start[i-1]();
}
}
int module_stop(SceSize argc, const void *args) {
if (&__dso_handle != nullptr) {
__cxxabiv1::__cxa_finalize(&__dso_handle);
}
__libc_fini_array();
return SCE_KERNEL_STOP_SUCCESS;
}
int module_exit() {
if (&__dso_handle != nullptr) {
__cxxabiv1::__cxa_finalize(&__dso_handle);
}
__libc_fini_array();
return SCE_KERNEL_STOP_SUCCESS;
}
int _start(SceSize argc, void *args) __attribute__ ((weak, alias ("module_start")));
int module_start(SceSize argc, void *args) {
PSP2FunctionPointers **arg = *(PSP2FunctionPointers ***)args;
__libc_init_array();
*arg = &PSP2Functions;
return SCE_KERNEL_START_SUCCESS;
}
}
#endif // defined(DYNAMIC_MODULES) && defined(PSP2)

9
backends/plugins/psp2/plugin.yml Normal file
View File

@@ -0,0 +1,9 @@
plugin:
attributes: 0
version:
major: 1
minor: 1
main:
start: module_start
stop: module_stop
exit: module_exit

41
backends/plugins/psp2/psp2-plugin.h Normal file
View File

@@ -0,0 +1,41 @@
/* 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/>.
*
*/
#ifndef BACKENDS_PLUGINS_PSP2_PLUGIN_H
#define BACKENDS_PLUGINS_PSP2_PLUGIN_H
#if defined(DYNAMIC_MODULES) && defined(PSP2)
struct PSP2FunctionPointers {
uint32 version;
int32 (*PLUGIN_getVersion)();
int32 (*PLUGIN_getType)();
int32 (*PLUGIN_getTypeVersion)();
PluginObject *(*PLUGIN_getObject)();
};
// Increment this when modifying the structure above
#define PSP2FunctionPointers_VERSION 1
#endif // defined(DYNAMIC_MODULES) && defined(PSP2)
#endif

163
backends/plugins/psp2/psp2-provider.cpp Normal file
View File

@@ -0,0 +1,163 @@
/* 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/>.
*
*/
// Disable symbol overrides so that we can use system headers.
#define FORBIDDEN_SYMBOL_ALLOW_ALL
#include "common/scummsys.h"
#if defined(DYNAMIC_MODULES) && defined(PSP2)
#include <psp2/kernel/modulemgr.h>
#include "backends/plugins/psp2/psp2-provider.h"
#include "backends/plugins/psp2/psp2-plugin.h"
#include "common/debug.h"
#include "common/fs.h"
// HACK: This is needed so that standard library functions that are only
// used in plugins can be found in the main executable.
#include <cxxabi.h>
void *forceLinkFunctions[] = {
// Select the nothrow variant
(void *)(void *(*)(std::size_t, std::nothrow_t const&))operator new [],
(void *)coshf,
(void *)fgetc,
(void *)frexpf,
(void *)getc,
(void *)log2f,
(void *)mbstowcs,
// Select the double version
(void *)(double (*)(double))nearbyint,
(void *)rename,
(void *)sinhf,
(void *)strcoll,
(void *)strspn,
(void *)tanhf,
(void *)vsprintf,
(void *)wcstombs,
(void *)__cxxabiv1::__cxa_bad_cast,
(void *)__cxxabiv1::__cxa_finalize,
(void *)__cxxabiv1::__cxa_guard_acquire,
(void *)__cxxabiv1::__cxa_guard_release,
(void *)__cxxabiv1::__cxa_guard_abort
};
class PSP2Plugin final : public Plugin {
protected:
SceUID _modId;
const Common::Path _filename;
public:
PSP2Plugin(const Common::Path &filename)
: _filename(filename), _modId(0) {}
bool loadPlugin() override {
assert(!_modId);
PSP2FunctionPointers *functions = nullptr;
PSP2FunctionPointers **arg = &functions;
int status = 0;
_modId = sceKernelLoadStartModule(_filename.toString(Common::Path::kNativeSeparator).c_str(), sizeof( arg ), &arg, 0, NULL, &status );
if (!_modId) {
debug("Failed loading plugin '%s' (error code %d)", _filename.toString(Common::Path::kNativeSeparator).c_str(), status);
return false;
} else {
debug(1, "Success loading plugin '%s', handle %08x", _filename.toString(Common::Path::kNativeSeparator).c_str(), _modId);
}
// Validate the Vita version
if (!functions) {
debug("Failed loading plugin '%s': no pointer", _filename.toString(Common::Path::kNativeSeparator).c_str());
unloadPlugin();
return false;
}
if (functions->version != PSP2FunctionPointers_VERSION) {
debug("Failed loading plugin '%s': unexpected version %d", _filename.toString(Common::Path::kNativeSeparator).c_str(), functions->version);
unloadPlugin();
return false;
}
// Validate the plugin API version
int32 version = functions->PLUGIN_getVersion();
if (version != PLUGIN_VERSION) {
warning("Plugin uses a different API version (you have: '%d', needed is: '%d')", version, PLUGIN_VERSION);
unloadPlugin();
return false;
}
// Get the type of the plugin
_type = (PluginType)functions->PLUGIN_getType();
if (_type >= PLUGIN_TYPE_MAX) {
warning("Plugin type unknown: %d", _type);
unloadPlugin();
return false;
}
// Validate the plugin type API version
int32 typeVersion = functions->PLUGIN_getTypeVersion();
if (typeVersion != pluginTypeVersions[_type]) {
warning("Plugin uses a different type API version (you have: '%d', needed is: '%d')", typeVersion, pluginTypeVersions[_type]);
unloadPlugin();
return false;
}
// Get the plugin object
_pluginObject = functions->PLUGIN_getObject();
if (!_pluginObject) {
warning("Couldn't get the plugin object");
unloadPlugin();
return false;
}
debug(1, "Successfully loaded plugin '%s'", _filename.toString(Common::Path::kNativeSeparator).c_str());
return true;
}
void unloadPlugin() override {
delete _pluginObject;
if (_modId) {
int status = 0;
int ret = sceKernelStopUnloadModule(_modId, 0, NULL, 0, NULL, &status);
if (ret != SCE_OK) {
debug("Failed unloading plugin '%s': %d/%d", _filename.toString(Common::Path::kNativeSeparator).c_str(), ret, status);
}
_modId = 0;
}
}
Common::Path getFileName() const override {
return _filename;
}
};
Plugin* PSP2PluginProvider::createPlugin(const Common::FSNode &node) const {
return new PSP2Plugin(node.getPath());
}
void PSP2PluginProvider::addCustomDirectories(Common::FSList &dirs) const {
dirs.push_back(Common::FSNode("app0:/plugins"));
}
#endif // defined(DYNAMIC_MODULES) && defined(PSP2)

37
backends/plugins/psp2/psp2-provider.h Normal file
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/* 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/>.
*
*/
#ifndef BACKENDS_PLUGINS_PSP2_PROVIDER_H
#define BACKENDS_PLUGINS_PSP2_PROVIDER_H
#include "base/plugins.h"
#if defined(DYNAMIC_MODULES) && defined(PSP2)
class PSP2PluginProvider final : public FilePluginProvider {
protected:
Plugin* createPlugin(const Common::FSNode &node) const override;
void addCustomDirectories(Common::FSList &dirs) const;
};
#endif // defined(DYNAMIC_MODULES) && defined(PSP2)
#endif

54
backends/plugins/riscos/plugin.cpp Normal file
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@@ -0,0 +1,54 @@
/* 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

221
backends/plugins/riscos/plugin.ld Normal file
View File

@@ -0,0 +1,221 @@
/* 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/>.
*
*/
OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
OUTPUT_ARCH(arm)
ENTRY(_start)
PHDRS
{
/* ScummVM's elf loader only allows a single segment, at the moment. */
plugin PT_LOAD FLAGS(7) /* Read | Write | Execute */;
}
SECTIONS
{
/* =========== CODE section =========== */
/* Start the output high in memory so PC-relative jumps from the plugin
to the main binary cannot reach, to force the linker to generate
veneers converting the relative jumps to absolute jumps */
. = 0x8000000;
.text ALIGN(0x1000) :
{
/* .text */
*(.text.unlikely .text.*_unlikely .text.unlikely.*)
*(.text.exit .text.exit.*)
*(.text.startup .text.startup.*)
*(.text.hot .text.hot.*)
*(.text .stub .text.* .gnu.linkonce.t.*)
/* .gnu.warning sections are handled specially by elf32.em. */
*(.gnu.warning)
*(.glue_7t) *(.glue_7) *(.riscos.libscl.chunkstub.start) *(SORT(.riscos.libscl.chunkstub.id*)) *(.riscos.libscl.chunkstub.end)
} : plugin
/* =========== RODATA section =========== */
. = ALIGN(0x1000);
.rodata :
{
*(.rodata)
*(.rodata.*)
*(.gnu.linkonce.r*)
*(.rodata1)
. = ALIGN(4);
} : plugin
.rodata1 :
{
*(.rodata1)
. = ALIGN(4);
} : plugin
.ARM.extab : { *(.ARM.extab* .gnu.linkonce.armextab.*) } : plugin
__exidx_start = .;
ARM.exidx : { *(.ARM.exidx* .gnu.linkonce.armexidx.*) } : plugin
__exidx_end = .;
/* =========== DATA section =========== */
. = ALIGN(0x1000);
.tdata ALIGN(4) :
{
*(.tdata)
*(.tdata.*)
*(.gnu.linkonce.td.*)
. = ALIGN(4);
} : plugin
.tbss ALIGN(4) :
{
*(.tbss)
*(.tbss.*)
*(.gnu.linkonce.tb.*)
*(.tcommon)
. = ALIGN(4);
} : plugin
.preinit_array ALIGN(4) :
{
PROVIDE (__preinit_array_start = .);
KEEP (*(.preinit_array))
PROVIDE (__preinit_array_end = .);
} : plugin
.init_array ALIGN(4) :
{
PROVIDE (__init_array_start = .);
KEEP (*(SORT(.init_array.*)))
KEEP (*(.init_array))
PROVIDE (__init_array_end = .);
} : plugin
.fini_array ALIGN(4) :
{
PROVIDE (__fini_array_start = .);
KEEP (*(.fini_array))
KEEP (*(SORT(.fini_array.*)))
PROVIDE (__fini_array_end = .);
} : plugin
.ctors ALIGN(4) :
{
___plugin_ctors = .;
KEEP (*(SORT(.ctors.*)))
KEEP (*(.ctors))
___plugin_ctors_end = .;
} : plugin
.dtors ALIGN(4) :
{
___plugin_dtors = .;
KEEP (*(SORT(.dtors.*)))
KEEP (*(.dtors))
___plugin_dtors_end = .;
} : plugin
.data :
{
*(.data)
*(.data.*)
*(.gnu.linkonce.d*)
CONSTRUCTORS
. = ALIGN(4);
} : plugin
.data1 :
{
*(.data1)
. = ALIGN(4);
} : plugin
__bss_start__ = .;
.bss ALIGN(4) :
{
*(.dynbss)
*(.bss)
*(SORT(.bss.*))
*(.gnu.linkonce.b*)
*(COMMON)
. = ALIGN(4);
} : plugin
__bss_end__ = .;
__end__ = ABSOLUTE(.) ;
/* ==================
==== Metadata ====
================== */
/* Discard sections that difficult post-processing */
/DISCARD/ : { *(.group .comment .note) }
/* Stabs debugging sections. */
.stab 0 : { *(.stab) }
.stabstr 0 : { *(.stabstr) }
.stab.excl 0 : { *(.stab.excl) }
.stab.exclstr 0 : { *(.stab.exclstr) }
.stab.index 0 : { *(.stab.index) }
.stab.indexstr 0 : { *(.stab.indexstr) }
/* DWARF debug sections.
Symbols in the DWARF debugging sections are relative to the beginning
of the section so we begin them at 0. */
/* DWARF 1 */
.debug 0 : { *(.debug) }
.line 0 : { *(.line) }
/* GNU DWARF 1 extensions */
.debug_srcinfo 0 : { *(.debug_srcinfo) }
.debug_sfnames 0 : { *(.debug_sfnames) }
/* DWARF 1.1 and DWARF 2 */
.debug_aranges 0 : { *(.debug_aranges) }
.debug_pubnames 0 : { *(.debug_pubnames) }
/* DWARF 2 */
.debug_info 0 : { *(.debug_info) }
.debug_abbrev 0 : { *(.debug_abbrev) }
.debug_line 0 : { *(.debug_line) }
.debug_frame 0 : { *(.debug_frame) }
.debug_str 0 : { *(.debug_str) }
.debug_loc 0 : { *(.debug_loc) }
.debug_macinfo 0 : { *(.debug_macinfo) }
/* SGI/MIPS DWARF 2 extensions */
.debug_weaknames 0 : { *(.debug_weaknames) }
.debug_funcnames 0 : { *(.debug_funcnames) }
.debug_typenames 0 : { *(.debug_typenames) }
.debug_varnames 0 : { *(.debug_varnames) }
/* DWARF 3 */
.debug_pubtypes 0 : { *(.debug_pubtypes) }
.debug_ranges 0 : { *(.debug_ranges) }
/* DWARF Extension. */
.debug_macro 0 : { *(.debug_macro) }
.gnu.attributes 0 : { KEEP (*(.gnu.attributes)) }
.note.gnu.arm.ident 0 : { KEEP (*(.note.gnu.arm.ident)) }
/DISCARD/ : { *(.note.GNU-stack) *(.gnu_debuglink) *(.gnu.lto_*) }
}

129
backends/plugins/riscos/riscos-provider.cpp Normal file
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/* 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/>.
*
*/
#define FORBIDDEN_SYMBOL_ALLOW_ALL
#include "common/scummsys.h"
#if defined(DYNAMIC_MODULES) && defined(RISCOS)
#include "backends/plugins/riscos/riscos-provider.h"
#include "backends/plugins/elf/arm-loader.h"
#include "common/debug.h"
#include <kernel.h>
#include <swis.h>
// HACK: These two function are part of private API in libunixlib
// They let allocate and free data in the application space where the stack is placed below 64MB
// When using malloc with big chunks we end up in memory mapped areas above 64MB
extern "C" {
extern void *__stackalloc (size_t __size);
extern void __stackfree (void *__ptr);
}
// HACK: This is needed so that standard library functions that are only
// used in plugins can be found in the main executable.
void pluginHack() {
volatile float f = 0.0f;
volatile double d = 0.0;
volatile int i = 0;
byte *b = new (std::nothrow) byte[100];
f = tanhf(f);
f = logf(f);
f = log2f(f);
f = log10f(f);
f = lroundf(f);
f = expf(f);
f = frexpf(f, NULL);
f = ldexpf(f, 1);
f = truncf(f);
d = nearbyint(d);
i = strcoll("dummyA", "dummyB");
rename("dummyA", "dummyB");
delete[] b;
}
class RiscOSDLObject : public ARMDLObject {
protected:
void flushDataCache(void *ptr, uint32 len) const override {
_kernel_swi_regs regs;
regs.r[0] = 1;
regs.r[1] = (int)ptr;
regs.r[2] = (int)ptr + len;
_kernel_swi(OS_SynchroniseCodeAreas, &regs, &regs);
}
};
/**
* On 26-bit RISC OS, plugins need to be allocated in the first 64 MB
* of RAM so that it can be executed. This may not be the case when using
* the default allocators, which use dynamic areas for large allocations.
*/
class RiscOSDLObject_AS : public RiscOSDLObject {
protected:
void *allocateMemory(uint32 align, uint32 size) override {
// Allocate with worst case alignment in application space
void *p = __stackalloc(size + sizeof(uintptr) + align - 1);
void *np = (void *)(((uintptr)p + align - 1) & (-align));
*(uintptr *)((byte *)np + size) = (uintptr)p;
debug(8, "Allocated %p while alignment was %d: using %p", p, align, np);
return np;
}
void deallocateMemory(void *ptr, uint32 size) override {
void *p = (void *)*(uintptr *)((byte *)ptr + size);
debug(8, "Freeing %p which was allocated at %p", ptr, p);
__stackfree(p);
}
};
RiscOSPluginProvider::RiscOSPluginProvider() : _is32bit(false) {
__asm__ volatile (
"SUBS %[is32bit], r0, r0\n\t" /* Set at least one status flag and set is32bits to 0 */
"TEQ pc, pc\n\t" /* First operand never contains flags while second one contains them in 26-bits only */
"MOVEQ %[is32bit], #1\n\t" /* Set to 1 only if EQ flag is set */
: [is32bit] "=r" (_is32bit)
: /* no inputs */
: "cc");
}
Plugin *RiscOSPluginProvider::createPlugin(const Common::FSNode &node) const {
if (_is32bit) {
return new TemplatedELFPlugin<RiscOSDLObject>(node.getPath());
} else {
return new TemplatedELFPlugin<RiscOSDLObject_AS>(node.getPath());
}
}
#endif // defined(DYNAMIC_MODULES) && defined(RISCOS)

40
backends/plugins/riscos/riscos-provider.h Normal file
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@@ -0,0 +1,40 @@
/* 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/>.
*
*/
#if defined(DYNAMIC_MODULES) && defined(RISCOS)
#ifndef BACKENDS_PLUGINS_RISCOS_PROVIDER_H
#define BACKENDS_PLUGINS_RISCOS_PROVIDER_H
#include "backends/plugins/elf/elf-provider.h"
class RiscOSPluginProvider : public ELFPluginProvider {
public:
RiscOSPluginProvider();
Plugin *createPlugin(const Common::FSNode &node) const;
private:
bool _is32bit;
};
#endif // BACKENDS_PLUGINS_RISCOS_PROVIDER_H
#endif // defined(DYNAMIC_MODULES) && defined(RISCOS)

37
backends/plugins/sdl/macosx/macosx-provider.cpp Normal file
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@@ -0,0 +1,37 @@
/* 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"
#if defined(DYNAMIC_MODULES) && defined(SDL_BACKEND) && defined(MACOSX)
#include "backends/plugins/sdl/macosx/macosx-provider.h"
#include "backends/platform/sdl/macosx/macosx_wrapper.h"
#include "common/fs.h"
void MacOSXPluginProvider::addCustomDirectories(Common::FSList &dirs) const {
Common::Path bundlePath(getResourceAppBundlePathMacOSX(), Common::Path::kNativeSeparator);
if (!bundlePath.empty())
dirs.push_back(Common::FSNode(bundlePath));
}
#endif // defined(DYNAMIC_MODULES) && defined(SDL_BACKEND) && defined(MACOSX)

36
backends/plugins/sdl/macosx/macosx-provider.h Normal file
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@@ -0,0 +1,36 @@
/* 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/>.
*
*/
#ifndef BACKENDS_PLUGINS_SDL_MACOSX_PROVIDER_H
#define BACKENDS_PLUGINS_SDL_MACOSX_PROVIDER_H
#include "backends/plugins/sdl/sdl-provider.h"
#if defined(DYNAMIC_MODULES) && defined(SDL_BACKEND) && defined(MACOSX)
class MacOSXPluginProvider : public SDLPluginProvider {
protected:
void addCustomDirectories(Common::FSList &dirs) const;
};
#endif // defined(DYNAMIC_MODULES) && defined(SDL_BACKEND) && defined(MACOSX)
#endif

92
backends/plugins/sdl/sdl-provider.cpp Normal file
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@@ -0,0 +1,92 @@
/* 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"
// RiscOS uses its own plugin provider and SDL one doesn't work
#if defined(DYNAMIC_MODULES) && defined(SDL_BACKEND)
#include "backends/plugins/sdl/sdl-provider.h"
#include "backends/plugins/dynamic-plugin.h"
#include "common/fs.h"
#include "backends/platform/sdl/sdl-sys.h"
class SDLPlugin : public DynamicPlugin {
protected:
#if SDL_VERSION_ATLEAST(3, 0, 0)
SDL_SharedObject *_dlHandle;
#else
void *_dlHandle;
#endif
virtual VoidFunc findSymbol(const char *symbol) {
#if SDL_VERSION_ATLEAST(3, 0, 0)
SDL_FunctionPointer func;
#else
void *func ;
#endif
func = SDL_LoadFunction(_dlHandle, symbol);
if (!func)
warning("Failed loading symbol '%s' from plugin '%s' (%s)", symbol, _filename.toString(Common::Path::kNativeSeparator).c_str(), SDL_GetError());
// FIXME HACK: This is a HACK to circumvent a clash between the ISO C++
// standard and POSIX: ISO C++ disallows casting between function pointers
// and data pointers, but dlsym always returns a void pointer. For details,
// see e.g. <https://web.archive.org/web/20061205092618/http://www.trilithium.com/johan/2004/12/problem-with-dlsym/>.
assert(sizeof(VoidFunc) == sizeof(func));
VoidFunc tmp;
memcpy(&tmp, &func, sizeof(VoidFunc));
return tmp;
}
public:
SDLPlugin(const Common::Path &filename)
: DynamicPlugin(filename), _dlHandle(0) {}
bool loadPlugin() {
assert(!_dlHandle);
_dlHandle = SDL_LoadObject(_filename.toString(Common::Path::kNativeSeparator).c_str());
if (!_dlHandle) {
warning("Failed loading plugin '%s' (%s)", _filename.toString(Common::Path::kNativeSeparator).c_str(), SDL_GetError());
return false;
}
return DynamicPlugin::loadPlugin();
}
void unloadPlugin() {
DynamicPlugin::unloadPlugin();
if (_dlHandle) {
SDL_UnloadObject(_dlHandle);
_dlHandle = 0;
}
}
};
Plugin* SDLPluginProvider::createPlugin(const Common::FSNode &node) const {
return new SDLPlugin(node.getPath());
}
#endif // defined(DYNAMIC_MODULES) && defined(SDL_BACKEND)

36
backends/plugins/sdl/sdl-provider.h Normal file
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@@ -0,0 +1,36 @@
/* 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/>.
*
*/
#ifndef BACKENDS_PLUGINS_SDL_H
#define BACKENDS_PLUGINS_SDL_H
#include "base/plugins.h"
#if defined(DYNAMIC_MODULES) && defined(SDL_BACKEND)
class SDLPluginProvider : public FilePluginProvider {
protected:
Plugin* createPlugin(const Common::FSNode &node) const;
};
#endif // defined(DYNAMIC_MODULES) && defined(SDL_BACKEND)
#endif

263
backends/plugins/wii/plugin.ld Normal file
View File

@@ -0,0 +1,263 @@
/*
* Linkscript for Wii
*/
OUTPUT_FORMAT("elf32-powerpc", "elf32-powerpc", "elf32-powerpc");
OUTPUT_ARCH(powerpc:common);
PHDRS
{
plugin PT_LOAD FLAGS(7);
}
SECTIONS
{
. = 0x81000000;
/* Program */
.init :
{
KEEP (*crt0.o(*.init))
KEEP (*(.init))
} :plugin = 0
.plt : { *(.plt) }
.interp : { *(.interp) }
.hash : { *(.hash) }
.dynsym : { *(.dynsym) }
.dynstr : { *(.dynstr) }
.gnu.version : { *(.gnu.version) }
.gnu.version_d : { *(.gnu.version_d) }
.gnu.version_r : { *(.gnu.version_r) }
.rel.init : { *(.rel.init) }
.rela.init : { *(.rela.init) }
.rel.text : { *(.rel.text .rel.text.* .rel.gnu.linkonce.t.*) }
.rela.text : { *(.rela.text .rela.text.* .rela.gnu.linkonce.t.*) }
.rel.fini : { *(.rel.fini) }
.rela.fini : { *(.rela.fini) }
.rel.rodata : { *(.rel.rodata .rel.rodata.* .rel.gnu.linkonce.r.*) }
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46
backends/plugins/wii/wii-provider.cpp Normal file
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/* 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/>.
*
*/
#define FORBIDDEN_SYMBOL_EXCEPTION_printf
#include "common/scummsys.h"
#if defined(DYNAMIC_MODULES) && defined(__WII__)
#include <malloc.h>
#include <ogc/cache.h>
#include "backends/plugins/wii/wii-provider.h"
#include "backends/plugins/elf/ppc-loader.h"
class WiiDLObject final : public PPCDLObject {
protected:
void flushDataCache(void *ptr, uint32 len) const override {
DCFlushRange(ptr, len);
ICInvalidateRange(ptr, len);
}
};
Plugin *WiiPluginProvider::createPlugin(const Common::FSNode &node) const {
return new TemplatedELFPlugin<WiiDLObject>(node.getPath());
}
#endif // defined(DYNAMIC_MODULES) && defined(__WII__)

36
backends/plugins/wii/wii-provider.h Normal file
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@@ -0,0 +1,36 @@
/* 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/>.
*
*/
#if defined(DYNAMIC_MODULES) && defined(__WII__)
#ifndef BACKENDS_PLUGINS_WII_PROVIDER_H
#define BACKENDS_PLUGINS_WII_PROVIDER_H
#include "backends/plugins/elf/elf-provider.h"
class WiiPluginProvider final : public ELFPluginProvider {
public:
Plugin *createPlugin(const Common::FSNode &node) const override;
};
#endif // BACKENDS_PLUGINS_WII_PROVIDER_H
#endif // defined(DYNAMIC_MODULES) && defined(__WII__)

95
backends/plugins/win32/win32-provider.cpp Normal file
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/* 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/>.
*
*/
// Disable symbol overrides so that we can use system headers.
#define FORBIDDEN_SYMBOL_ALLOW_ALL
#include "common/scummsys.h"
#if defined(DYNAMIC_MODULES) && defined(_WIN32)
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <tchar.h>
#include "backends/platform/sdl/win32/win32_wrapper.h"
#include "backends/plugins/win32/win32-provider.h"
#include "backends/plugins/dynamic-plugin.h"
#include "common/debug.h"
#include "common/fs.h"
class Win32Plugin final : public DynamicPlugin {
protected:
void *_dlHandle;
VoidFunc findSymbol(const char *symbol) override {
FARPROC func = GetProcAddress((HMODULE)_dlHandle, symbol);
if (!func)
debug("Failed loading symbol '%s' from plugin '%s'", symbol, _filename.toString(Common::Path::kNativeSeparator).c_str());
return (void (*)())func;
}
public:
Win32Plugin(const Common::Path &filename)
: DynamicPlugin(filename), _dlHandle(0) {}
bool loadPlugin() override {
assert(!_dlHandle);
TCHAR *tFilename = Win32::stringToTchar(_filename.toString(Common::Path::kNativeSeparator));
_dlHandle = LoadLibrary(tFilename);
free(tFilename);
if (!_dlHandle) {
warning("Failed loading plugin '%s' (error code %d)", _filename.toString(Common::Path::kNativeSeparator).c_str(), (int32) GetLastError());
return false;
} else {
debug(1, "Success loading plugin '%s', handle %p", _filename.toString(Common::Path::kNativeSeparator).c_str(), _dlHandle);
}
return DynamicPlugin::loadPlugin();
}
void unloadPlugin() override {
DynamicPlugin::unloadPlugin();
if (_dlHandle) {
if (!FreeLibrary((HMODULE)_dlHandle))
warning("Failed unloading plugin '%s'", _filename.toString(Common::Path::kNativeSeparator).c_str());
else
debug(1, "Success unloading plugin '%s'", _filename.toString(Common::Path::kNativeSeparator).c_str());
_dlHandle = 0;
}
}
};
Plugin* Win32PluginProvider::createPlugin(const Common::FSNode &node) const {
return new Win32Plugin(node.getPath());
}
bool Win32PluginProvider::isPluginFilename(const Common::FSNode &node) const {
// Check the plugin suffix
Common::String filename = node.getName();
return filename.hasSuffix(".dll");
}
#endif // defined(DYNAMIC_MODULES) && defined(_WIN32)

38
backends/plugins/win32/win32-provider.h Normal file
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@@ -0,0 +1,38 @@
/* 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/>.
*
*/
#ifndef BACKENDS_PLUGINS_WIN32_H
#define BACKENDS_PLUGINS_WIN32_H
#include "base/plugins.h"
#if defined(DYNAMIC_MODULES) && defined(_WIN32)
class Win32PluginProvider final : public FilePluginProvider {
protected:
Plugin* createPlugin(const Common::FSNode &node) const override;
bool isPluginFilename(const Common::FSNode &node) const override;
};
#endif // defined(DYNAMIC_MODULES) && defined(_WIN32)
#endif