[Scummvm-cvs-logs] SF.net SVN: scummvm:[51236] scummvm/branches/gsoc2010-plugins/backends/ platform/ds/arm9
toneman1138 at users.sourceforge.net
toneman1138 at users.sourceforge.net
Sat Jul 24 09:14:19 CEST 2010
Revision: 51236
http://scummvm.svn.sourceforge.net/scummvm/?rev=51236&view=rev
Author: toneman1138
Date: 2010-07-24 07:14:19 +0000 (Sat, 24 Jul 2010)
Log Message:
-----------
changed ds makefile to use abstracted ELF-loader with ds-specific additions added to backends/plugins/ds
Modified Paths:
--------------
scummvm/branches/gsoc2010-plugins/backends/platform/ds/arm9/makefile
Removed Paths:
-------------
scummvm/branches/gsoc2010-plugins/backends/platform/ds/arm9/source/dsloader.cpp
scummvm/branches/gsoc2010-plugins/backends/platform/ds/arm9/source/dsloader.h
Modified: scummvm/branches/gsoc2010-plugins/backends/platform/ds/arm9/makefile
===================================================================
--- scummvm/branches/gsoc2010-plugins/backends/platform/ds/arm9/makefile 2010-07-24 05:56:06 UTC (rev 51235)
+++ scummvm/branches/gsoc2010-plugins/backends/platform/ds/arm9/makefile 2010-07-24 07:14:19 UTC (rev 51236)
@@ -295,7 +295,8 @@
$(portdir)/source/touchkeyboard.o $(portdir)/source/zipreader.o\
$(portdir)/source/dsoptions.o $(portdir)/source/keys.o $(portdir)/source/wordcompletion.o\
$(portdir)/source/interrupt.o\
- $(portdir)/source/dsloader.o
+ $(srcdir)/backends/plugins/elf-loader.o\
+ $(srcdir)/backends/plugins/ds/ds-loader.o
ifdef USE_PROFILER
PORT_OBJS += $(portdir)/source/profiler/cyg-profile.o
Deleted: scummvm/branches/gsoc2010-plugins/backends/platform/ds/arm9/source/dsloader.cpp
===================================================================
--- scummvm/branches/gsoc2010-plugins/backends/platform/ds/arm9/source/dsloader.cpp 2010-07-24 05:56:06 UTC (rev 51235)
+++ scummvm/branches/gsoc2010-plugins/backends/platform/ds/arm9/source/dsloader.cpp 2010-07-24 07:14:19 UTC (rev 51236)
@@ -1,553 +0,0 @@
-/* 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 2
- * 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, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
- * $URL$
- * $Id$
- *
- */
-
-#if defined(DYNAMIC_MODULES) && defined(__DS__)
-
-#include <string.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <malloc.h>
-#include <unistd.h>
-#include <sys/_default_fcntl.h>
-
-//#include "backends/fs/stdiostream.h"
-#include "backends/fs/ds/ds-fs.h"
-#include "dsmain.h"
-
-#include "backends/platform/ds/arm9/source/dsloader.h"
-
-#define __DS_DEBUG_PLUGINS__
-
-#ifdef __DS_DEBUG_PLUGINS__
-#define DBG(x,...) consolePrintf(x, ## __VA_ARGS__)
-#else
-#define DBG(x,...)
-#endif
-
-#define seterror(x,...) consolePrintf(x, ## __VA_ARGS__)
-
-// Expel the symbol table from memory
-void DLObject::discard_symtab() {
- free(_symtab);
- free(_strtab);
- _symtab = NULL;
- _strtab = NULL;
- _symbol_cnt = 0;
-}
-
-// Unload all objects from memory
-void DLObject::unload() {
- discard_symtab();
- free(_segment);
- _segment = NULL;
-}
-
-/**
- * Follow the instruction of a relocation section.
- *
- * @param DLFile SeekableReadStream of File
- * @param offset Offset into the File
- * @param size Size of relocation section
- *
- */
-bool DLObject::relocate(Common::SeekableReadStream* DLFile, unsigned long offset, unsigned long size, void *relSegment) {
- Elf32_Rel *rel = NULL; //relocation entry
-
- // Allocate memory for relocation table
- if (!(rel = (Elf32_Rel *)malloc(size))) {
- seterror("Out of memory.");
- return false;
- }
-
- // Read in our relocation table
- if (DLFile->seek(offset, SEEK_SET) < 0 ||
- DLFile->read(rel, size) != (ssize_t)size) {
- seterror("Relocation table load failed.");
- free(rel);
- return false;
- }
-
- // Treat each relocation entry. Loop over all of them
- int cnt = size / sizeof(*rel);
-
- DBG("Loaded relocation table. %d entries. base address=%p\n", cnt, relSegment);
-
- int a = 0;
- unsigned int relocation = 0;
-
- // Loop over relocation entries
- for (int i = 0; i < cnt; i++) {
-
- // Get the symbol this relocation entry is referring to
- Elf32_Sym *sym = (Elf32_Sym *)(_symtab) + (REL_INDEX(rel[i].r_info));
-
- // Get the target instruction in the code
- unsigned int *target = (unsigned int *)((char *)relSegment + rel[i].r_offset);
-
- unsigned int origTarget = *target; //Save for debugging
-
- // Act differently based on the type of relocation
- switch (REL_TYPE(rel[i].r_info)) {
-
- case R_ARM_ABS32:
- if (sym->st_shndx < SHN_LOPROC) { // Only shift for plugin section.
- a = *target; // Get full 32 bits of addend
- relocation = a + (Elf32_Addr)_segment; // Shift by main offset
-
- *target = relocation;
-
- DBG("R_ARM_ABS32: i=%d, a=%x, origTarget=%x, target=%x\n", i, a, origTarget, *target);
- }
- break;
-
- case R_ARM_THM_CALL:
- DBG("R_ARM_THM_CALL: PC-relative jump, ld takes care of necessary relocation work for us.\n");
- break;
-
- case R_ARM_CALL:
- DBG("R_ARM_CALL: PC-relative jump, ld takes care of necessary relocation work for us.\n");
- break;
-
- case R_ARM_JUMP24:
- DBG("R_ARM_JUMP24: PC-relative jump, ld takes care of all relocation work for us.\n");
- break;
-
- 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 + (Elf32_Addr)_segment; // Shift by main offset
-
- *target = relocation;
-
- DBG("R_ARM_TARGET1: i=%d, a=%x, origTarget=%x, target=%x\n", i, a, origTarget, *target);
- DBG("Make sure --target1-abs is a flag to LD.\n");
- }
- break;
-
- case R_ARM_V4BX:
- DBG("R_ARM_V4BX: No relocation calculation necessary.\n");
- break;
-
- default:
- seterror("Unknown relocation type %d.", REL_TYPE(rel[i].r_info));
- free(rel);
- return false;
- }
-
- }
-
- free(rel);
- return true;
-}
-
-bool DLObject::readElfHeader(Common::SeekableReadStream* DLFile, Elf32_Ehdr *ehdr) {
-
- // Start reading the elf header. Check for errors
- if (DLFile->read(ehdr, sizeof(*ehdr)) != sizeof(*ehdr) ||
- memcmp(ehdr->e_ident, ELFMAG, SELFMAG) || // Check MAGIC
- ehdr->e_type != ET_EXEC || // Check for executable
- ehdr->e_machine != EM_ARM || // Check for ARM machine type
- ehdr->e_phentsize < sizeof(Elf32_Phdr) || // Check for size of program header
- ehdr->e_shentsize != sizeof(Elf32_Shdr)) { // Check for size of section header
- seterror("Invalid file type.");
- return false;
- }
-
- DBG("phoff = %d, phentsz = %d, phnum = %d\n",
- ehdr->e_phoff, ehdr->e_phentsize, ehdr->e_phnum);
-
- return true;
-}
-
-bool DLObject::readProgramHeaders(Common::SeekableReadStream* DLFile, Elf32_Ehdr *ehdr, Elf32_Phdr *phdr, int num) {
-
- // Read program header
- if (DLFile->seek(ehdr->e_phoff + sizeof(*phdr)*num, SEEK_SET) < 0 ||
- DLFile->read(phdr, sizeof(*phdr)) != sizeof(*phdr)) {
- seterror("Program header load failed.");
- return false;
- }
-
- // Check program header values
- if (phdr->p_type != PT_LOAD || phdr->p_filesz > phdr->p_memsz) {
- seterror("Invalid program header.");
- return false;
- }
-
- DBG("offs = %x, filesz = %x, memsz = %x, align = %x\n",
- phdr->p_offset, phdr->p_filesz, phdr->p_memsz, phdr->p_align);
-
- return true;
-
-}
-
-bool DLObject::loadSegment(Common::SeekableReadStream* DLFile, Elf32_Phdr *phdr) {
-
- char *baseAddress = 0;
-
- // Attempt to allocate memory for segment
- int extra = phdr->p_vaddr % phdr->p_align; // Get extra length TODO: check logic here
- DBG("extra mem is %x\n", extra);
-
- if (!(_segment = (char *)memalign(phdr->p_align, phdr->p_memsz + extra))) {
- seterror("Out of memory.\n");
- return false;
- }
-
- DBG("allocated segment @ %p\n", _segment);
-
- // Get offset to load segment into
- baseAddress = (char *)_segment + phdr->p_vaddr;
- _segmentSize = phdr->p_memsz + extra;
-
- DBG("base address is %p\n", baseAddress);
- DBG("_segmentSize is %p\n", _segmentSize);
-
- // Set bss segment to 0 if necessary (assumes bss is at the end)
- if (phdr->p_memsz > phdr->p_filesz) {
- DBG("Setting %p to %p to 0 for bss\n", baseAddress + phdr->p_filesz, baseAddress + phdr->p_memsz);
- memset(baseAddress + phdr->p_filesz, 0, phdr->p_memsz - phdr->p_filesz);
- }
-
- DBG("Reading the segment into memory\n");
-
- // Read the segment into memory
- if (DLFile->seek(phdr->p_offset, SEEK_SET) < 0 ||
- DLFile->read(baseAddress, phdr->p_filesz) != (ssize_t)phdr->p_filesz) {
- seterror("Segment load failed.");
- return false;
- }
-
- DBG("Segment has been read into memory\n");
-
- return true;
-}
-
-Elf32_Shdr * DLObject::loadSectionHeaders(Common::SeekableReadStream* DLFile, Elf32_Ehdr *ehdr) {
-
- Elf32_Shdr *shdr = NULL;
-
- // Allocate memory for section headers
- if (!(shdr = (Elf32_Shdr *)malloc(ehdr->e_shnum * sizeof(*shdr)))) {
- seterror("Out of memory.");
- return NULL;
- }
-
- // Read from file into section headers
- if (DLFile->seek(ehdr->e_shoff, SEEK_SET) < 0 ||
- DLFile->read(shdr, ehdr->e_shnum * sizeof(*shdr)) !=
- (ssize_t)(ehdr->e_shnum * sizeof(*shdr))) {
- seterror("Section headers load failed.");
- return NULL;
- }
-
- return shdr;
-}
-
-int DLObject::loadSymbolTable(Common::SeekableReadStream* DLFile, Elf32_Ehdr *ehdr, Elf32_Shdr *shdr) {
-
- // Loop over sections, looking for symbol table linked to a string table
- for (int 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 &&
- _symtab_sect < 0) {
- _symtab_sect = i;
- }
- }
-
- // Check for no symbol table
- if (_symtab_sect < 0) {
- seterror("No symbol table.");
- return -1;
- }
-
- DBG("Symbol section at section %d, size %x\n", _symtab_sect, shdr[_symtab_sect].sh_size);
-
- // Allocate memory for symbol table
- if (!(_symtab = malloc(shdr[_symtab_sect].sh_size))) {
- seterror("Out of memory.");
- return -1;
- }
-
- // Read symbol table into memory
- if (DLFile->seek(shdr[_symtab_sect].sh_offset, SEEK_SET) < 0 ||
- DLFile->read(_symtab, shdr[_symtab_sect].sh_size) !=
- (ssize_t)shdr[_symtab_sect].sh_size) {
- seterror("Symbol table load failed.");
- return -1;
- }
-
- // Set number of symbols
- _symbol_cnt = shdr[_symtab_sect].sh_size / sizeof(Elf32_Sym);
- DBG("Loaded %d symbols.\n", _symbol_cnt);
-
- return _symtab_sect;
-
-}
-
-bool DLObject::loadStringTable(Common::SeekableReadStream* DLFile, Elf32_Shdr *shdr) {
-
- int string_sect = shdr[_symtab_sect].sh_link;
-
- // Allocate memory for string table
- if (!(_strtab = (char *)malloc(shdr[string_sect].sh_size))) {
- seterror("Out of memory.");
- return false;
- }
-
- // Read string table into memory
- if (DLFile->seek(shdr[string_sect].sh_offset, SEEK_SET) < 0 ||
- DLFile->read(_strtab, shdr[string_sect].sh_size) !=
- (ssize_t)shdr[string_sect].sh_size) {
- seterror("Symbol table strings load failed.");
- return false;
- }
-
- return true;
-}
-
-void DLObject::relocateSymbols(Elf32_Addr offset) {
-
- int relocCount = 0;
- DBG("Relocating symbols by %x\n", offset);
-
- // Loop over symbols, add relocation offset
- Elf32_Sym *s = (Elf32_Sym *)_symtab;
- for (int c = _symbol_cnt; c--; s++) {
- // Make sure we don't relocate special valued symbols
- if (s->st_shndx < SHN_LOPROC) {
- relocCount++;
- s->st_value += offset;
- //if (s->st_value < (Elf32_Addr)_segment || s->st_value > (Elf32_Addr)_segment + _segmentSize)
- //seterror("Symbol out of bounds! st_value = %x\n", s->st_value);
-
- }
-
- }
-
- DBG("Relocated %d symbols.\n",relocCount);
-}
-
-bool DLObject::relocateRels(Common::SeekableReadStream* DLFile, Elf32_Ehdr *ehdr, Elf32_Shdr *shdr) {
-
- // Loop over sections, finding relocation sections
- for (int 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 || curShdr->sh_type == SHT_RELA) && // Check for a relocation section
- curShdr->sh_entsize == sizeof(Elf32_Rel) && // Check for proper relocation size
- (int)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) {
- seterror("RELA entries not supported for ARM yet!\n");
- return false;
- }
-
- if (!relocate(DLFile, curShdr->sh_offset, curShdr->sh_size, _segment)) {
- return false;
- }
-
- }
- }
-
- return true;
-}
-
-bool DLObject::load(Common::SeekableReadStream* DLFile) {
- Elf32_Ehdr ehdr;
- Elf32_Phdr phdr;
- Elf32_Shdr *shdr;
- bool ret = true;
-
- if (readElfHeader(DLFile, &ehdr) == false) {
- return false;
- }
-
- for (int i = 0; i < ehdr.e_phnum; i++) { //Load our segments
-
- DBG("Loading segment %d\n", i);
-
- if (readProgramHeaders(DLFile, &ehdr, &phdr, i) == false)
- return false;
-
- if (!loadSegment(DLFile, &phdr))
- return false;
- }
-
- if ((shdr = loadSectionHeaders(DLFile, &ehdr)) == NULL)
- ret = false;
-
- if (ret && ((_symtab_sect = loadSymbolTable(DLFile, &ehdr, shdr)) < 0))
- ret = false;
-
- if (ret && (loadStringTable(DLFile, shdr) == false))
- ret = false;
-
- if (ret)
- relocateSymbols((Elf32_Addr)_segment); // Offset by our segment allocated address
-
- if (ret && (relocateRels(DLFile, &ehdr, shdr) == false))
- ret = false;
-
- free(shdr);
-
- return ret;
-
-}
-
-bool DLObject::open(const char *path) {
-
- Common::SeekableReadStream* DLFile;
- void *ctors_start, *ctors_end;
-
- DBG("open(\"%s\")\n", path);
-
- Common::FSNode file(path);
-
- if (!(DLFile = file.createReadStream())) {
- seterror("%s not found.", path);
- return false;
- }
-
- DBG("%s found!\n", path);
-
- /*Try to load and relocate*/
- if (!load(DLFile)) {
- //DLFile->finalize();
- unload();
- return false;
- }
-
- DBG("loaded!/n");
-
- //DLFile->finalize();
-
- //flush data cache
- DC_FlushAll();
-
- 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 == NULL || ctors_end == NULL || _dtors_start == NULL ||
- _dtors_end == NULL) {
- seterror("Missing ctors/dtors.");
- _dtors_start = _dtors_end = NULL;
- unload();
- return false;
- }
-
- DBG(("Calling constructors.\n"));
- for (void (**f)(void) = (void (**)(void))ctors_start; f != ctors_end; f++)
- (**f)();
-
- DBG(("%s opened ok.\n", path));
-
- return true;
-}
-
-bool DLObject::close() {
- if (_dtors_start != NULL && _dtors_end != NULL)
- for (void (**f)(void) = (void (**)(void))_dtors_start; f != _dtors_end; f++)
- (**f)();
- _dtors_start = _dtors_end = NULL;
- unload();
- return true;
-}
-
-void *DLObject::symbol(const char *name) {
- DBG(("symbol(\"%s\")\n", name));
-
- if (_symtab == NULL || _strtab == NULL || _symbol_cnt < 1) {
- seterror("No symbol table loaded.");
- return NULL;
- }
-
- Elf32_Sym *s = (Elf32_Sym *)_symtab;
- for (int 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
- DBG("=> %p\n", (void*)s->st_value);
- return (void*)s->st_value;
- }
-
- // We didn't find the symbol
- seterror("Symbol \"%s\" not found.", name);
- return NULL;
-}
-
-
-static char dlerr[MAXDLERRLEN];
-
-void *dlopen(const char *filename, int flags) {
- DLObject *obj = new DLObject(dlerr);
- if (obj->open(filename))
- return (void *)obj;
- delete obj;
- return NULL;
-}
-
-int dlclose(void *handle) {
- DLObject *obj = (DLObject *)handle;
- if (obj == NULL) {
- strcpy(dlerr, "Handle is NULL.");
- return -1;
- }
- if (obj->close()) {
- delete obj;
- return 0;
- }
- return -1;
-}
-
-void *dlsym(void *handle, const char *symbol) {
- if (handle == NULL) {
- strcpy(dlerr, "Handle is NULL.");
- return NULL;
- }
- return ((DLObject *)handle)->symbol(symbol);
-}
-
-const char *dlerror() {
- return dlerr;
-}
-
-void dlforgetsyms(void *handle) {
- if (handle != NULL)
- ((DLObject *)handle)->discard_symtab();
-}
-
-#endif /* DYNAMIC_MODULES && __DS__ */
Deleted: scummvm/branches/gsoc2010-plugins/backends/platform/ds/arm9/source/dsloader.h
===================================================================
--- scummvm/branches/gsoc2010-plugins/backends/platform/ds/arm9/source/dsloader.h 2010-07-24 05:56:06 UTC (rev 51235)
+++ scummvm/branches/gsoc2010-plugins/backends/platform/ds/arm9/source/dsloader.h 2010-07-24 07:14:19 UTC (rev 51236)
@@ -1,81 +0,0 @@
-/* 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 2
- * 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, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
- * $URL$
- * $Id$
- *
- */
-
-#ifndef DS_LOADER_H
-#define DS_LOADER_H
-
-#include "elf32.h"
-#include "common/list.h"
-
-#define MAXDLERRLEN 80
-
-class DLObject {
-protected:
- char *_errbuf; /* For error messages, at least MAXDLERRLEN in size */
-
- void *_segment, *_symtab;
- char *_strtab;
- int _symbol_cnt;
- int _symtab_sect;
- void *_dtors_start, *_dtors_end;
-
- int _segmentSize;
-
- void seterror(const char *fmt, ...);
- void unload();
- bool relocate(Common::SeekableReadStream* DLFile, unsigned long offset, unsigned long size, void *relSegment);
- bool load(Common::SeekableReadStream* DLFile);
-
- bool readElfHeader(Common::SeekableReadStream* DLFile, Elf32_Ehdr *ehdr);
- bool readProgramHeaders(Common::SeekableReadStream* DLFile, Elf32_Ehdr *ehdr, Elf32_Phdr *phdr, int num);
- bool loadSegment(Common::SeekableReadStream* DLFile, Elf32_Phdr *phdr);
- Elf32_Shdr *loadSectionHeaders(Common::SeekableReadStream* DLFile, Elf32_Ehdr *ehdr);
- int loadSymbolTable(Common::SeekableReadStream* DLFile, Elf32_Ehdr *ehdr, Elf32_Shdr *shdr);
- bool loadStringTable(Common::SeekableReadStream* DLFile, Elf32_Shdr *shdr);
- void relocateSymbols(Elf32_Addr offset);
- bool relocateRels(Common::SeekableReadStream* DLFile, Elf32_Ehdr *ehdr, Elf32_Shdr *shdr);
-
-public:
- bool open(const char *path);
- bool close();
- void *symbol(const char *name);
- void discard_symtab();
-
- DLObject(char *errbuf = NULL) : _errbuf(_errbuf), _segment(NULL), _symtab(NULL),
- _strtab(NULL), _symbol_cnt(0), _symtab_sect(-1), _dtors_start(NULL), _dtors_end(NULL),
- _segmentSize(0) {}
-};
-
-#define RTLD_LAZY 0
-
-extern "C" {
- void *dlopen(const char *filename, int flags);
- int dlclose(void *handle);
- void *dlsym(void *handle, const char *symbol);
- const char *dlerror();
- void dlforgetsyms(void *handle);
-}
-
-#endif /* DS_LOADER_H */
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