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Merge pull request #22 from bunnei/loader-improvements

Browse Source 
Refactor loader code and add preliminary NCCH support
This commit is contained in:
bunnei 2014-06-25 09:46:14 -04:00
commit 469fe42fad
19 changed files with 1203 additions and 925 deletions
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27
src/citra/citra.cpp
View File

@ -8,7 +8,7 @@
#include "core/system.h"
#include "core/core.h"
#include "core/loader.h"
#include "core/loader/loader.h"
#include "citra/emu_window/emu_window_glfw.h"
@ -16,28 +16,21 @@
/// Application entry point
int __cdecl main(int argc, char **argv) {
std::string program_dir = File::GetCurrentDir();
LogManager::Init();
if (argc < 2) {
ERROR_LOG(BOOT, "Failed to load ROM: No ROM specified");
return -1;
}
std::string boot_filename = argv[1];
EmuWindow_GLFW* emu_window = new EmuWindow_GLFW;
System::Init(emu_window);
std::string boot_filename;
if (argc < 2) {
ERROR_LOG(BOOT, "Failed to load ROM: No ROM specified");
}
else {
boot_filename = argv[1];
}
std::string error_str;
bool res = Loader::LoadFile(boot_filename, &error_str);
if (!res) {
ERROR_LOG(BOOT, "Failed to load ROM: %s", error_str.c_str());
if (Loader::ResultStatus::Success != Loader::LoadFile(boot_filename)) {
ERROR_LOG(BOOT, "Failed to load ROM!");
return -1;
}
Core::RunLoop();

2
src/citra_qt/bootmanager.cpp
View File

@ -5,7 +5,7 @@
#include "bootmanager.hxx"
#include "core/core.h"
#include "core/loader.h"
#include "core/loader/loader.h"
#include "core/hw/hw.h"
#include "video_core/video_core.h"

10
src/citra_qt/main.cpp
View File

@ -23,9 +23,10 @@
#include "debugger/graphics_cmdlists.hxx"
#include "core/system.h"
#include "core/loader.h"
#include "core/core.h"
#include "core/loader/loader.h"
#include "core/arm/disassembler/load_symbol_map.h"
#include "version.h"
@ -134,11 +135,8 @@ void GMainWindow::BootGame(const char* filename)
// Load a game or die...
std::string boot_filename = filename;
std::string error_str;
bool res = Loader::LoadFile(boot_filename, &error_str);
if (!res) {
ERROR_LOG(BOOT, "Failed to load ROM: %s", error_str.c_str());
if (Loader::ResultStatus::Success != Loader::LoadFile(boot_filename)) {
ERROR_LOG(BOOT, "Failed to load ROM!");
}
disasmWidget->Init();

11
src/core/CMakeLists.txt
View File

@ -1,6 +1,8 @@
set(SRCS core.cpp
core_timing.cpp
loader.cpp
loader/elf.cpp
loader/loader.cpp
loader/ncch.cpp
mem_map.cpp
mem_map_funcs.cpp
system.cpp
@ -27,7 +29,6 @@ set(SRCS core.cpp
arm/interpreter/mmu/tlb.cpp
arm/interpreter/mmu/wb.cpp
arm/interpreter/mmu/xscale_copro.cpp
elf/elf_reader.cpp
file_sys/directory_file_system.cpp
file_sys/meta_file_system.cpp
hle/hle.cpp
@ -50,7 +51,9 @@ set(SRCS core.cpp
set(HEADERS core.h
core_timing.h
loader.h
loader/elf.h
loader/loader.h
loader/ncch.h
mem_map.h
system.h
arm/disassembler/arm_disasm.h
@ -72,8 +75,6 @@ set(HEADERS core.h
arm/interpreter/vfp/asm_vfp.h
arm/interpreter/vfp/vfp.h
arm/interpreter/vfp/vfp_helper.h
elf/elf_reader.h
elf/elf_types.h
file_sys/directory_file_system.h
file_sys/file_sys.h
file_sys/meta_file_system.h

13
src/core/core.vcxproj
View File

@ -162,7 +162,6 @@
<ClCompile Include="arm\interpreter\vfp\vfpsingle.cpp" />
<ClCompile Include="core.cpp" />
<ClCompile Include="core_timing.cpp" />
<ClCompile Include="elf\elf_reader.cpp" />
<ClCompile Include="file_sys\directory_file_system.cpp" />
<ClCompile Include="file_sys\meta_file_system.cpp" />
<ClCompile Include="hle\config_mem.cpp" />
@ -182,7 +181,9 @@
<ClCompile Include="hw\gpu.cpp" />
<ClCompile Include="hw\hw.cpp" />
<ClCompile Include="hw\ndma.cpp" />
<ClCompile Include="loader.cpp" />
<ClCompile Include="loader\elf.cpp" />
<ClCompile Include="loader\loader.cpp" />
<ClCompile Include="loader\ncch.cpp" />
<ClCompile Include="mem_map.cpp" />
<ClCompile Include="mem_map_funcs.cpp" />
<ClCompile Include="system.cpp" />
@ -210,8 +211,6 @@
<ClInclude Include="arm\interpreter\vfp\vfp_helper.h" />
<ClInclude Include="core.h" />
<ClInclude Include="core_timing.h" />
<ClInclude Include="elf\elf_reader.h" />
<ClInclude Include="elf\elf_types.h" />
<ClInclude Include="file_sys\directory_file_system.h" />
<ClInclude Include="file_sys\file_sys.h" />
<ClInclude Include="file_sys\meta_file_system.h" />
@ -233,7 +232,9 @@
<ClInclude Include="hw\gpu.h" />
<ClInclude Include="hw\hw.h" />
<ClInclude Include="hw\ndma.h" />
<ClInclude Include="loader.h" />
<ClInclude Include="loader\elf.h" />
<ClInclude Include="loader\loader.h" />
<ClInclude Include="loader\ncch.h" />
<ClInclude Include="mem_map.h" />
<ClInclude Include="system.h" />
</ItemGroup>
@ -243,4 +244,4 @@
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
<ImportGroup Label="ExtensionTargets">
</ImportGroup>
</Project>
</Project>

37
src/core/core.vcxproj.filters
View File

@ -16,9 +16,6 @@
<Filter Include="hw">
<UniqueIdentifier>{d1158fc4-3e0f-431f-9d3b-f30bbfeb4ad5}</UniqueIdentifier>
</Filter>
<Filter Include="elf">
<UniqueIdentifier>{7ae34319-6d72-4d12-bc62-9b438ba9241f}</UniqueIdentifier>
</Filter>
<Filter Include="hle">
<UniqueIdentifier>{8b62769e-3e2a-4a57-a7bc-b3b2933c2bc7}</UniqueIdentifier>
</Filter>
@ -34,6 +31,9 @@
<Filter Include="hle\kernel">
<UniqueIdentifier>{8089d94b-5faa-43dc-854b-ffd2fa2e7fe3}</UniqueIdentifier>
</Filter>
<Filter Include="loader">
<UniqueIdentifier>{491d5558-5f3a-4283-8ba4-0a58b1984e37}</UniqueIdentifier>
</Filter>
</ItemGroup>
<ItemGroup>
<ClCompile Include="arm\disassembler\arm_disasm.cpp">
@ -72,11 +72,7 @@
<ClCompile Include="hw\hw.cpp">
<Filter>hw</Filter>
</ClCompile>
<ClCompile Include="elf\elf_reader.cpp">
<Filter>elf</Filter>
</ClCompile>
<ClCompile Include="core.cpp" />
<ClCompile Include="loader.cpp" />
<ClCompile Include="mem_map.cpp" />
<ClCompile Include="mem_map_funcs.cpp" />
<ClCompile Include="system.cpp" />
@ -171,6 +167,15 @@
<ClCompile Include="hle\service\ndm.cpp">
<Filter>hle\service</Filter>
</ClCompile>
<ClCompile Include="loader\loader.cpp">
<Filter>loader</Filter>
</ClCompile>
<ClCompile Include="loader\ncch.cpp">
<Filter>loader</Filter>
</ClCompile>
<ClCompile Include="loader\elf.cpp">
<Filter>loader</Filter>
</ClCompile>
</ItemGroup>
<ItemGroup>
<ClInclude Include="arm\disassembler\arm_disasm.h">
@ -212,18 +217,11 @@
<ClInclude Include="hw\hw.h">
<Filter>hw</Filter>
</ClInclude>
<ClInclude Include="elf\elf_reader.h">
<Filter>elf</Filter>
</ClInclude>
<ClInclude Include="elf\elf_types.h">
<Filter>elf</Filter>
</ClInclude>
<ClInclude Include="arm\arm_interface.h">
<Filter>arm</Filter>
</ClInclude>
<ClInclude Include="core.h" />
<ClInclude Include="core_timing.h" />
<ClInclude Include="loader.h" />
<ClInclude Include="mem_map.h" />
<ClInclude Include="system.h" />
<ClInclude Include="hle\hle.h">
@ -307,8 +305,17 @@
<ClInclude Include="hle\service\ndm.h">
<Filter>hle\service</Filter>
</ClInclude>
<ClInclude Include="loader\loader.h">
<Filter>loader</Filter>
</ClInclude>
<ClInclude Include="loader\ncch.h">
<Filter>loader</Filter>
</ClInclude>
<ClInclude Include="loader\elf.h">
<Filter>loader</Filter>
</ClInclude>
</ItemGroup>
<ItemGroup>
<Text Include="CMakeLists.txt" />
</ItemGroup>
</Project>
</Project>

190
src/core/elf/elf_reader.cpp
View File

@ -1,190 +0,0 @@
// Copyright 2013 Dolphin Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
#include <string>
#include "common/common.h"
#include "common/symbols.h"
#include "core/mem_map.h"
#include "core/elf/elf_reader.h"
//void bswap(Elf32_Word &w) {w = Common::swap32(w);}
//void bswap(Elf32_Half &w) {w = Common::swap16(w);}
#define bswap(w) w // Dirty bswap disable for now... 3DS is little endian, anyway
static void byteswapHeader(Elf32_Ehdr &ELF_H)
{
bswap(ELF_H.e_type);
bswap(ELF_H.e_machine);
bswap(ELF_H.e_ehsize);
bswap(ELF_H.e_phentsize);
bswap(ELF_H.e_phnum);
bswap(ELF_H.e_shentsize);
bswap(ELF_H.e_shnum);
bswap(ELF_H.e_shstrndx);
bswap(ELF_H.e_version);
bswap(ELF_H.e_entry);
bswap(ELF_H.e_phoff);
bswap(ELF_H.e_shoff);
bswap(ELF_H.e_flags);
}
static void byteswapSegment(Elf32_Phdr &sec)
{
bswap(sec.p_align);
bswap(sec.p_filesz);
bswap(sec.p_flags);
bswap(sec.p_memsz);
bswap(sec.p_offset);
bswap(sec.p_paddr);
bswap(sec.p_vaddr);
bswap(sec.p_type);
}
static void byteswapSection(Elf32_Shdr &sec)
{
bswap(sec.sh_addr);
bswap(sec.sh_addralign);
bswap(sec.sh_entsize);
bswap(sec.sh_flags);
bswap(sec.sh_info);
bswap(sec.sh_link);
bswap(sec.sh_name);
bswap(sec.sh_offset);
bswap(sec.sh_size);
bswap(sec.sh_type);
}
ElfReader::ElfReader(void *ptr)
{
base = (char*)ptr;
base32 = (u32 *)ptr;
header = (Elf32_Ehdr*)ptr;
byteswapHeader(*header);
segments = (Elf32_Phdr *)(base + header->e_phoff);
sections = (Elf32_Shdr *)(base + header->e_shoff);
entryPoint = header->e_entry;
LoadSymbols();
}
const char *ElfReader::GetSectionName(int section) const
{
if (sections[section].sh_type == SHT_NULL)
return nullptr;
int nameOffset = sections[section].sh_name;
char *ptr = (char*)GetSectionDataPtr(header->e_shstrndx);
if (ptr)
return ptr + nameOffset;
else
return nullptr;
}
bool ElfReader::LoadInto(u32 vaddr)
{
DEBUG_LOG(MASTER_LOG,"String section: %i", header->e_shstrndx);
// Should we relocate?
bRelocate = (header->e_type != ET_EXEC);
if (bRelocate)
{
DEBUG_LOG(MASTER_LOG,"Relocatable module");
entryPoint += vaddr;
}
else
{
DEBUG_LOG(MASTER_LOG,"Prerelocated executable");
}
INFO_LOG(MASTER_LOG,"%i segments:", header->e_phnum);
// First pass : Get the bits into RAM
u32 segmentVAddr[32];
u32 baseAddress = bRelocate?vaddr:0;
for (int i = 0; i < header->e_phnum; i++)
{
Elf32_Phdr *p = segments + i;
INFO_LOG(MASTER_LOG, "Type: %i Vaddr: %08x Filesz: %i Memsz: %i ", p->p_type, p->p_vaddr, p->p_filesz, p->p_memsz);
if (p->p_type == PT_LOAD)
{
segmentVAddr[i] = baseAddress + p->p_vaddr;
u32 writeAddr = segmentVAddr[i];
const u8 *src = GetSegmentPtr(i);
u8 *dst = Memory::GetPointer(writeAddr);
u32 srcSize = p->p_filesz;
u32 dstSize = p->p_memsz;
u32 *s = (u32*)src;
u32 *d = (u32*)dst;
for (int j = 0; j < (int)(srcSize + 3) / 4; j++)
{
*d++ = /*_byteswap_ulong*/(*s++);
}
if (srcSize < dstSize)
{
//memset(dst + srcSize, 0, dstSize-srcSize); //zero out bss
}
INFO_LOG(MASTER_LOG,"Loadable Segment Copied to %08x, size %08x", writeAddr, p->p_memsz);
}
}
INFO_LOG(MASTER_LOG,"Done loading.");
return true;
}
SectionID ElfReader::GetSectionByName(const char *name, int firstSection) const
{
for (int i = firstSection; i < header->e_shnum; i++)
{
const char *secname = GetSectionName(i);
if (secname != nullptr && strcmp(name, secname) == 0)
return i;
}
return -1;
}
bool ElfReader::LoadSymbols()
{
bool hasSymbols = false;
SectionID sec = GetSectionByName(".symtab");
if (sec != -1)
{
int stringSection = sections[sec].sh_link;
const char *stringBase = (const char *)GetSectionDataPtr(stringSection);
//We have a symbol table!
Elf32_Sym *symtab = (Elf32_Sym *)(GetSectionDataPtr(sec));
int numSymbols = sections[sec].sh_size / sizeof(Elf32_Sym);
for (int sym = 0; sym < numSymbols; sym++)
{
int size = symtab[sym].st_size;
if (size == 0)
continue;
// int bind = symtab[sym].st_info >> 4;
int type = symtab[sym].st_info & 0xF;
const char *name = stringBase + symtab[sym].st_name;
Symbols::Add(symtab[sym].st_value, name, size, type);
hasSymbols = true;
}
}
return hasSymbols;
}

75
src/core/elf/elf_reader.h
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@ -1,75 +0,0 @@
// Copyright 2013 Dolphin Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
#pragma once
#include "core/elf/elf_types.h"
enum KnownElfTypes
{
KNOWNELF_PSP = 0,
KNOWNELF_DS = 1,
KNOWNELF_GBA = 2,
KNOWNELF_GC = 3,
};
typedef int SectionID;
class ElfReader
{
private:
char *base;
u32 *base32;
Elf32_Ehdr *header;
Elf32_Phdr *segments;
Elf32_Shdr *sections;
u32 *sectionAddrs;
bool bRelocate;
u32 entryPoint;
public:
ElfReader(void *ptr);
~ElfReader() { }
u32 Read32(int off) const { return base32[off>>2]; }
// Quick accessors
ElfType GetType() const { return (ElfType)(header->e_type); }
ElfMachine GetMachine() const { return (ElfMachine)(header->e_machine); }
u32 GetEntryPoint() const { return entryPoint; }
u32 GetFlags() const { return (u32)(header->e_flags); }
bool LoadInto(u32 vaddr);
bool LoadSymbols();
int GetNumSegments() const { return (int)(header->e_phnum); }
int GetNumSections() const { return (int)(header->e_shnum); }
const u8 *GetPtr(int offset) const { return (u8*)base + offset; }
const char *GetSectionName(int section) const;
const u8 *GetSectionDataPtr(int section) const
{
if (section < 0 || section >= header->e_shnum)
return nullptr;
if (sections[section].sh_type != SHT_NOBITS)
return GetPtr(sections[section].sh_offset);
else
return nullptr;
}
bool IsCodeSection(int section) const
{
return sections[section].sh_type == SHT_PROGBITS;
}
const u8 *GetSegmentPtr(int segment)
{
return GetPtr(segments[segment].p_offset);
}
u32 GetSectionAddr(SectionID section) const { return sectionAddrs[section]; }
int GetSectionSize(SectionID section) const { return sections[section].sh_size; }
SectionID GetSectionByName(const char *name, int firstSection = 0) const; //-1 for not found
bool DidRelocate() {
return bRelocate;
}
};

281
src/core/elf/elf_types.h
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@ -1,281 +0,0 @@
// Copyright 2013 Dolphin Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
#pragma once
// ELF Header Constants
// File type
enum ElfType
{
ET_NONE = 0,
ET_REL = 1,
ET_EXEC = 2,
ET_DYN = 3,
ET_CORE = 4,
ET_LOPROC = 0xFF00,
ET_HIPROC = 0xFFFF,
};
// Machine/Architecture
enum ElfMachine
{
EM_NONE = 0,
EM_M32 = 1,
EM_SPARC = 2,
EM_386 = 3,
EM_68K = 4,
EM_88K = 5,
EM_860 = 7,
EM_MIPS = 8
};
// File version
#define EV_NONE 0
#define EV_CURRENT 1
// Identification index
#define EI_MAG0 0
#define EI_MAG1 1
#define EI_MAG2 2
#define EI_MAG3 3
#define EI_CLASS 4
#define EI_DATA 5
#define EI_VERSION 6
#define EI_PAD 7
#define EI_NIDENT 16
// Magic number
#define ELFMAG0 0x7F
#define ELFMAG1 'E'
#define ELFMAG2 'L'
#define ELFMAG3 'F'
// File class
#define ELFCLASSNONE 0
#define ELFCLASS32 1
#define ELFCLASS64 2
// Encoding
#define ELFDATANONE 0
#define ELFDATA2LSB 1
#define ELFDATA2MSB 2
// Sections constants
// Section indexes
#define SHN_UNDEF 0
#define SHN_LORESERVE 0xFF00
#define SHN_LOPROC 0xFF00
#define SHN_HIPROC 0xFF1F
#define SHN_ABS 0xFFF1
#define SHN_COMMON 0xFFF2
#define SHN_HIRESERVE 0xFFFF
// Section types
#define SHT_NULL 0
#define SHT_PROGBITS 1
#define SHT_SYMTAB 2
#define SHT_STRTAB 3
#define SHT_RELA 4
#define SHT_HASH 5
#define SHT_DYNAMIC 6
#define SHT_NOTE 7
#define SHT_NOBITS 8
#define SHT_REL 9
#define SHT_SHLIB 10
#define SHT_DYNSYM 11
#define SHT_LOPROC 0x70000000
#define SHT_HIPROC 0x7FFFFFFF
#define SHT_LOUSER 0x80000000
#define SHT_HIUSER 0xFFFFFFFF
// Custom section types
#define SHT_PSPREL 0x700000a0
// Section flags
enum ElfSectionFlags
{
SHF_WRITE = 0x1,
SHF_ALLOC = 0x2,
SHF_EXECINSTR = 0x4,
SHF_MASKPROC = 0xF0000000,
};
// Symbol binding
#define STB_LOCAL 0
#define STB_GLOBAL 1
#define STB_WEAK 2
#define STB_LOPROC 13
#define STB_HIPROC 15
// Symbol types
#define STT_NOTYPE 0
#define STT_OBJECT 1
#define STT_FUNC 2
#define STT_SECTION 3
#define STT_FILE 4
#define STT_LOPROC 13
#define STT_HIPROC 15
// Undefined name
#define STN_UNDEF 0
// Relocation types
#define R_386_NONE 0
#define R_386_32 1
#define R_386_PC32 2
#define R_386_GOT32 3
#define R_386_PLT32 4
#define R_386_COPY 5
#define R_386_GLOB_DAT 6
#define R_386_JMP_SLOT 7
#define R_386_RELATIVE 8
#define R_386_GOTOFF 9
#define R_386_GOTPC 10
// Segment types
#define PT_NULL 0
#define PT_LOAD 1
#define PT_DYNAMIC 2
#define PT_INTERP 3
#define PT_NOTE 4
#define PT_SHLIB 5
#define PT_PHDR 6
#define PT_LOPROC 0x70000000
#define PT_HIPROC 0x7FFFFFFF
// Segment flags
#define PF_X 1
#define PF_W 2
#define PF_R 4
// Dynamic Array Tags
#define DT_NULL 0
#define DT_NEEDED 1
#define DT_PLTRELSZ 2
#define DT_PLTGOT 3
#define DT_HASH 4
#define DT_STRTAB 5
#define DT_SYMTAB 6
#define DT_RELA 7
#define DT_RELASZ 8
#define DT_RELAENT 9
#define DT_STRSZ 10
#define DT_SYMENT 11
#define DT_INIT 12
#define DT_FINI 13
#define DT_SONAME 14
#define DT_RPATH 15
#define DT_SYMBOLIC 16
#define DT_REL 17
#define DT_RELSZ 18
#define DT_RELENT 19
#define DT_PLTREL 20
#define DT_DEBUG 21
#define DT_TEXTREL 22
#define DT_JMPREL 23
#define DT_LOPROC 0x70000000
#define DT_HIPROC 0x7FFFFFFF
typedef unsigned int Elf32_Addr;
typedef unsigned short Elf32_Half;
typedef unsigned int Elf32_Off;
typedef signed int Elf32_Sword;
typedef unsigned int Elf32_Word;
// ELF file header
struct Elf32_Ehdr
{
unsigned char e_ident[EI_NIDENT];
Elf32_Half e_type;
Elf32_Half e_machine;
Elf32_Word e_version;
Elf32_Addr e_entry;
Elf32_Off e_phoff;
Elf32_Off e_shoff;
Elf32_Word e_flags;
Elf32_Half e_ehsize;
Elf32_Half e_phentsize;
Elf32_Half e_phnum;
Elf32_Half e_shentsize;
Elf32_Half e_shnum;
Elf32_Half e_shstrndx;
};
// Section header
struct Elf32_Shdr
{
Elf32_Word sh_name;
Elf32_Word sh_type;
Elf32_Word sh_flags;
Elf32_Addr sh_addr;
Elf32_Off sh_offset;
Elf32_Word sh_size;
Elf32_Word sh_link;
Elf32_Word sh_info;
Elf32_Word sh_addralign;
Elf32_Word sh_entsize;
};
// Segment header
struct Elf32_Phdr
{
Elf32_Word p_type;
Elf32_Off p_offset;
Elf32_Addr p_vaddr;
Elf32_Addr p_paddr;
Elf32_Word p_filesz;
Elf32_Word p_memsz;
Elf32_Word p_flags;
Elf32_Word p_align;
};
// Symbol table entry
struct Elf32_Sym
{
Elf32_Word st_name;
Elf32_Addr st_value;
Elf32_Word st_size;
unsigned char st_info;
unsigned char st_other;
Elf32_Half st_shndx;
};
#define ELF32_ST_BIND(i) ((i)>>4)
#define ELF32_ST_TYPE(i) ((i)&0xf)
#define ELF32_ST_INFO(b,t) (((b)<<4)+((t)&0xf))
// Relocation entries
struct Elf32_Rel
{
Elf32_Addr r_offset;
Elf32_Word r_info;
};
struct Elf32_Rela
{
Elf32_Addr r_offset;
Elf32_Word r_info;
Elf32_Sword r_addend;
};
#define ELF32_R_SYM(i) ((i)>>8)
#define ELF32_R_TYPE(i) ((unsigned char)(i))
#define ELF32_R_INFO(s,t) (((s)<<8 )+(unsigned char)(t))
struct Elf32_Dyn
{
Elf32_Sword d_tag;
union
{
Elf32_Word d_val;
Elf32_Addr d_ptr;
} d_un;
};

275
src/core/loader.cpp
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@ -1,275 +0,0 @@
// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
#include "common/common_types.h"
#include "common/file_util.h"
#include "core/loader.h"
#include "core/system.h"
#include "core/core.h"
#include "core/file_sys/directory_file_system.h"
#include "core/elf/elf_reader.h"
#include "core/hle/kernel/kernel.h"
#include "core/mem_map.h"
////////////////////////////////////////////////////////////////////////////////////////////////////
/// Loads an extracted CXI from a directory
bool LoadDirectory_CXI(std::string &filename) {
std::string full_path = filename;
std::string path, file, extension;
SplitPath(ReplaceAll(full_path, "\\", "/"), &path, &file, &extension);
#if EMU_PLATFORM == PLATFORM_WINDOWS
path = ReplaceAll(path, "/", "\\");
#endif
DirectoryFileSystem *fs = new DirectoryFileSystem(&System::g_ctr_file_system, path);
System::g_ctr_file_system.Mount("fs:", fs);
std::string final_name = "fs:/" + file + extension;
File::IOFile f(filename, "rb");
if (f.IsOpen()) {
// TODO(ShizZy): read here to memory....
}
ERROR_LOG(TIME, "Unimplemented function!");
return true;
}
/// Loads a CTR ELF file
bool Load_ELF(std::string &filename) {
std::string full_path = filename;
std::string path, file, extension;
SplitPath(ReplaceAll(full_path, "\\", "/"), &path, &file, &extension);
#if EMU_PLATFORM == PLATFORM_WINDOWS
path = ReplaceAll(path, "/", "\\");
#endif
File::IOFile f(filename, "rb");
if (f.IsOpen()) {
u64 size = f.GetSize();
u8* buffer = new u8[size];
ElfReader* elf_reader = NULL;
f.ReadBytes(buffer, size);
elf_reader = new ElfReader(buffer);
elf_reader->LoadInto(0x00100000);
Kernel::LoadExec(elf_reader->GetEntryPoint());
delete[] buffer;
delete elf_reader;
} else {
return false;
}
f.Close();
return true;
}
/// Loads a Launcher DAT file
bool Load_DAT(std::string &filename) {
std::string full_path = filename;
std::string path, file, extension;
SplitPath(ReplaceAll(full_path, "\\", "/"), &path, &file, &extension);
#if EMU_PLATFORM == PLATFORM_WINDOWS
path = ReplaceAll(path, "/", "\\");
#endif
File::IOFile f(filename, "rb");
if (f.IsOpen()) {
u64 size = f.GetSize();
u8* buffer = new u8[size];
f.ReadBytes(buffer, size);
/**
* (mattvail) We shouldn't really support this type of file
* but for the sake of making it easier... we'll temporarily/hackishly
* allow it. No sense in making a proper reader for this.
*/
u32 entry_point = 0x00100000; // write to same entrypoint as elf
u32 payload_offset = 0xA150;
const u8 *src = &buffer[payload_offset];
u8 *dst = Memory::GetPointer(entry_point);
u32 srcSize = size - payload_offset; //just load everything...
u32 *s = (u32*)src;
u32 *d = (u32*)dst;
for (int j = 0; j < (int)(srcSize + 3) / 4; j++)
{
*d++ = (*s++);
}
Kernel::LoadExec(entry_point);
delete[] buffer;
}
else {
return false;
}
f.Close();
return true;
}
/// Loads a CTR BIN file extracted from an ExeFS
bool Load_BIN(std::string &filename) {
std::string full_path = filename;
std::string path, file, extension;
SplitPath(ReplaceAll(full_path, "\\", "/"), &path, &file, &extension);
#if EMU_PLATFORM == PLATFORM_WINDOWS
path = ReplaceAll(path, "/", "\\");
#endif
File::IOFile f(filename, "rb");
if (f.IsOpen()) {
u64 size = f.GetSize();
u8* buffer = new u8[size];
f.ReadBytes(buffer, size);
u32 entry_point = 0x00100000; // Hardcoded, read from exheader
const u8 *src = buffer;
u8 *dst = Memory::GetPointer(entry_point);
u32 srcSize = size;
u32 *s = (u32*)src;
u32 *d = (u32*)dst;
for (int j = 0; j < (int)(srcSize + 3) / 4; j++)
{
*d++ = (*s++);
}
Kernel::LoadExec(entry_point);
delete[] buffer;
}
else {
return false;
}
f.Close();
return true;
}
namespace Loader {
bool IsBootableDirectory() {
ERROR_LOG(TIME, "Unimplemented function!");
return true;
}
/**
* Identifies the type of a bootable file
* @param filename String filename of bootable file
* @todo (ShizZy) this function sucks... make it actually check file contents etc.
* @return FileType of file
*/
FileType IdentifyFile(std::string &filename) {
if (filename.size() == 0) {
ERROR_LOG(LOADER, "invalid filename %s", filename.c_str());
return FILETYPE_ERROR;
}
std::string extension = filename.size() >= 5 ? filename.substr(filename.size() - 4) : "";
if (File::IsDirectory(filename)) {
if (IsBootableDirectory()) {
return FILETYPE_DIRECTORY_CXI;
}
else {
return FILETYPE_NORMAL_DIRECTORY;
}
}
else if (!strcasecmp(extension.c_str(), ".elf")) {
return FILETYPE_CTR_ELF; // TODO(bunnei): Do some filetype checking :p
}
else if (!strcasecmp(extension.c_str(), ".axf")) {
return FILETYPE_CTR_ELF; // TODO(bunnei): Do some filetype checking :p
}
else if (!strcasecmp(extension.c_str(), ".bin")) {
return FILETYPE_CTR_BIN;
}
else if (!strcasecmp(extension.c_str(), ".dat")) {
return FILETYPE_LAUNCHER_DAT;
}
else if (!strcasecmp(extension.c_str(), ".zip")) {
return FILETYPE_ARCHIVE_ZIP;
}
else if (!strcasecmp(extension.c_str(), ".rar")) {
return FILETYPE_ARCHIVE_RAR;
}
else if (!strcasecmp(extension.c_str(), ".r00")) {
return FILETYPE_ARCHIVE_RAR;
}
else if (!strcasecmp(extension.c_str(), ".r01")) {
return FILETYPE_ARCHIVE_RAR;
}
return FILETYPE_UNKNOWN;
}
/**
* Identifies and loads a bootable file
* @param filename String filename of bootable file
* @param error_string Point to string to put error message if an error has occurred
* @return True on success, otherwise false
*/
bool LoadFile(std::string &filename, std::string *error_string) {
INFO_LOG(LOADER, "Identifying file...");
// Note that this can modify filename!
switch (IdentifyFile(filename)) {
case FILETYPE_CTR_ELF:
return Load_ELF(filename);
case FILETYPE_CTR_BIN:
return Load_BIN(filename);
case FILETYPE_LAUNCHER_DAT:
return Load_DAT(filename);
case FILETYPE_DIRECTORY_CXI:
return LoadDirectory_CXI(filename);
case FILETYPE_ERROR:
ERROR_LOG(LOADER, "Could not read file");
*error_string = "Error reading file";
break;
case FILETYPE_ARCHIVE_RAR:
#ifdef WIN32
*error_string = "RAR file detected (Require WINRAR)";
#else
*error_string = "RAR file detected (Require UnRAR)";
#endif
break;
case FILETYPE_ARCHIVE_ZIP:
#ifdef WIN32
*error_string = "ZIP file detected (Require WINRAR)";
#else
*error_string = "ZIP file detected (Require UnRAR)";
#endif
break;
case FILETYPE_NORMAL_DIRECTORY:
ERROR_LOG(LOADER, "Just a directory.");
*error_string = "Just a directory.";
break;
case FILETYPE_UNKNOWN_BIN:
case FILETYPE_UNKNOWN_ELF:
case FILETYPE_UNKNOWN:
default:
ERROR_LOG(LOADER, "Failed to identify file");
*error_string = " Failed to identify file";
break;
}
return false;
}
} // namespace

54
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// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
#pragma once
#include "common/common.h"
////////////////////////////////////////////////////////////////////////////////////////////////////
namespace Loader {
enum FileType {
FILETYPE_ERROR,
FILETYPE_CTR_CCI,
FILETYPE_CTR_CIA,
FILETYPE_CTR_CXI,
FILETYPE_CTR_ELF,
FILETYPE_CTR_BIN,
FILETYPE_LAUNCHER_DAT,
FILETYPE_DIRECTORY_CXI,
FILETYPE_UNKNOWN_BIN,
FILETYPE_UNKNOWN_ELF,
FILETYPE_ARCHIVE_RAR,
FILETYPE_ARCHIVE_ZIP,
FILETYPE_NORMAL_DIRECTORY,
FILETYPE_UNKNOWN
};
////////////////////////////////////////////////////////////////////////////////////////////////////
/**
* Identifies the type of a bootable file
* @param filename String filename of bootable file
* @return FileType of file
*/
FileType IdentifyFile(std::string &filename);
/**
* Identifies and loads a bootable file
* @param filename String filename of bootable file
* @param error_string Point to string to put error message if an error has occurred
* @return True on success, otherwise false
*/
bool LoadFile(std::string &filename, std::string *error_string);
} // namespace

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// Copyright 2013 Dolphin Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
#include <string>
#include <memory>
#include "common/common.h"
#include "common/file_util.h"
#include "common/symbols.h"
#include "core/mem_map.h"
#include "core/loader/elf.h"
#include "core/hle/kernel/kernel.h"
////////////////////////////////////////////////////////////////////////////////////////////////////
// ELF Header Constants
// File type
enum ElfType {
ET_NONE = 0,
ET_REL = 1,
ET_EXEC = 2,
ET_DYN = 3,
ET_CORE = 4,
ET_LOPROC = 0xFF00,
ET_HIPROC = 0xFFFF,
};
// Machine/Architecture
enum ElfMachine {
EM_NONE = 0,
EM_M32 = 1,
EM_SPARC = 2,
EM_386 = 3,
EM_68K = 4,
EM_88K = 5,
EM_860 = 7,
EM_MIPS = 8
};
// File version
#define EV_NONE 0
#define EV_CURRENT 1
// Identification index
#define EI_MAG0 0
#define EI_MAG1 1
#define EI_MAG2 2
#define EI_MAG3 3
#define EI_CLASS 4
#define EI_DATA 5
#define EI_VERSION 6
#define EI_PAD 7
#define EI_NIDENT 16
// Magic number
#define ELFMAG0 0x7F
#define ELFMAG1 'E'
#define ELFMAG2 'L'
#define ELFMAG3 'F'
// Sections constants
// Section types
#define SHT_NULL 0
#define SHT_PROGBITS 1
#define SHT_SYMTAB 2
#define SHT_STRTAB 3
#define SHT_RELA 4
#define SHT_HASH 5
#define SHT_DYNAMIC 6
#define SHT_NOTE 7
#define SHT_NOBITS 8
#define SHT_REL 9
#define SHT_SHLIB 10
#define SHT_DYNSYM 11
#define SHT_LOPROC 0x70000000
#define SHT_HIPROC 0x7FFFFFFF
#define SHT_LOUSER 0x80000000
#define SHT_HIUSER 0xFFFFFFFF
// Section flags
enum ElfSectionFlags
{
SHF_WRITE = 0x1,
SHF_ALLOC = 0x2,
SHF_EXECINSTR = 0x4,
SHF_MASKPROC = 0xF0000000,
};
// Segment types
#define PT_NULL 0
#define PT_LOAD 1
#define PT_DYNAMIC 2
#define PT_INTERP 3
#define PT_NOTE 4
#define PT_SHLIB 5
#define PT_PHDR 6
#define PT_LOPROC 0x70000000
#define PT_HIPROC 0x7FFFFFFF
typedef unsigned int Elf32_Addr;
typedef unsigned short Elf32_Half;
typedef unsigned int Elf32_Off;
typedef signed int Elf32_Sword;
typedef unsigned int Elf32_Word;
////////////////////////////////////////////////////////////////////////////////////////////////////
// ELF file header
struct Elf32_Ehdr {
unsigned char e_ident[EI_NIDENT];
Elf32_Half e_type;
Elf32_Half e_machine;
Elf32_Word e_version;
Elf32_Addr e_entry;
Elf32_Off e_phoff;
Elf32_Off e_shoff;
Elf32_Word e_flags;
Elf32_Half e_ehsize;
Elf32_Half e_phentsize;
Elf32_Half e_phnum;
Elf32_Half e_shentsize;
Elf32_Half e_shnum;
Elf32_Half e_shstrndx;
};
// Section header
struct Elf32_Shdr {
Elf32_Word sh_name;
Elf32_Word sh_type;
Elf32_Word sh_flags;
Elf32_Addr sh_addr;
Elf32_Off sh_offset;
Elf32_Word sh_size;
Elf32_Word sh_link;
Elf32_Word sh_info;
Elf32_Word sh_addralign;
Elf32_Word sh_entsize;
};
// Segment header
struct Elf32_Phdr {
Elf32_Word p_type;
Elf32_Off p_offset;
Elf32_Addr p_vaddr;
Elf32_Addr p_paddr;
Elf32_Word p_filesz;
Elf32_Word p_memsz;
Elf32_Word p_flags;
Elf32_Word p_align;
};
// Symbol table entry
struct Elf32_Sym {
Elf32_Word st_name;
Elf32_Addr st_value;
Elf32_Word st_size;
unsigned char st_info;
unsigned char st_other;
Elf32_Half st_shndx;
};
// Relocation entries
struct Elf32_Rel {
Elf32_Addr r_offset;
Elf32_Word r_info;
};
////////////////////////////////////////////////////////////////////////////////////////////////////
// ElfReader class
typedef int SectionID;
class ElfReader {
private:
char *base;
u32 *base32;
Elf32_Ehdr *header;
Elf32_Phdr *segments;
Elf32_Shdr *sections;
u32 *sectionAddrs;
bool relocate;
u32 entryPoint;
public:
ElfReader(void *ptr);
~ElfReader() { }
u32 Read32(int off) const { return base32[off >> 2]; }
// Quick accessors
ElfType GetType() const { return (ElfType)(header->e_type); }
ElfMachine GetMachine() const { return (ElfMachine)(header->e_machine); }
u32 GetEntryPoint() const { return entryPoint; }
u32 GetFlags() const { return (u32)(header->e_flags); }
bool LoadInto(u32 vaddr);
bool LoadSymbols();
int GetNumSegments() const { return (int)(header->e_phnum); }
int GetNumSections() const { return (int)(header->e_shnum); }
const u8 *GetPtr(int offset) const { return (u8*)base + offset; }
const char *GetSectionName(int section) const;
const u8 *GetSectionDataPtr(int section) const {
if (section < 0 || section >= header->e_shnum)
return nullptr;
if (sections[section].sh_type != SHT_NOBITS)
return GetPtr(sections[section].sh_offset);
else
return nullptr;
}
bool IsCodeSection(int section) const {
return sections[section].sh_type == SHT_PROGBITS;
}
const u8 *GetSegmentPtr(int segment) {
return GetPtr(segments[segment].p_offset);
}
u32 GetSectionAddr(SectionID section) const { return sectionAddrs[section]; }
int GetSectionSize(SectionID section) const { return sections[section].sh_size; }
SectionID GetSectionByName(const char *name, int firstSection = 0) const; //-1 for not found
bool DidRelocate() {
return relocate;
}
};
ElfReader::ElfReader(void *ptr) {
base = (char*)ptr;
base32 = (u32 *)ptr;
header = (Elf32_Ehdr*)ptr;
segments = (Elf32_Phdr *)(base + header->e_phoff);
sections = (Elf32_Shdr *)(base + header->e_shoff);
entryPoint = header->e_entry;
LoadSymbols();
}
const char *ElfReader::GetSectionName(int section) const {
if (sections[section].sh_type == SHT_NULL)
return nullptr;
int name_offset = sections[section].sh_name;
char *ptr = (char*)GetSectionDataPtr(header->e_shstrndx);
if (ptr)
return ptr + name_offset;
return nullptr;
}
bool ElfReader::LoadInto(u32 vaddr) {
DEBUG_LOG(MASTER_LOG, "String section: %i", header->e_shstrndx);
// Should we relocate?
relocate = (header->e_type != ET_EXEC);
if (relocate) {
DEBUG_LOG(MASTER_LOG, "Relocatable module");
entryPoint += vaddr;
} else {
DEBUG_LOG(MASTER_LOG, "Prerelocated executable");
}
INFO_LOG(MASTER_LOG, "%i segments:", header->e_phnum);
// First pass : Get the bits into RAM
u32 segment_addr[32];
u32 base_addr = relocate ? vaddr : 0;
for (int i = 0; i < header->e_phnum; i++) {
Elf32_Phdr *p = segments + i;
INFO_LOG(MASTER_LOG, "Type: %i Vaddr: %08x Filesz: %i Memsz: %i ", p->p_type, p->p_vaddr,
p->p_filesz, p->p_memsz);
if (p->p_type == PT_LOAD) {
segment_addr[i] = base_addr + p->p_vaddr;
memcpy(Memory::GetPointer(segment_addr[i]), GetSegmentPtr(i), p->p_filesz);
INFO_LOG(MASTER_LOG, "Loadable Segment Copied to %08x, size %08x", segment_addr[i],
p->p_memsz);
}
}
INFO_LOG(MASTER_LOG, "Done loading.");
return true;
}
SectionID ElfReader::GetSectionByName(const char *name, int firstSection) const {
for (int i = firstSection; i < header->e_shnum; i++) {
const char *secname = GetSectionName(i);
if (secname != nullptr && strcmp(name, secname) == 0)
return i;
}
return -1;
}
bool ElfReader::LoadSymbols() {
bool hasSymbols = false;
SectionID sec = GetSectionByName(".symtab");
if (sec != -1) {
int stringSection = sections[sec].sh_link;
const char *stringBase = (const char *)GetSectionDataPtr(stringSection);
//We have a symbol table!
Elf32_Sym *symtab = (Elf32_Sym *)(GetSectionDataPtr(sec));
int numSymbols = sections[sec].sh_size / sizeof(Elf32_Sym);
for (int sym = 0; sym < numSymbols; sym++) {
int size = symtab[sym].st_size;
if (size == 0)
continue;
int type = symtab[sym].st_info & 0xF;
const char *name = stringBase + symtab[sym].st_name;
Symbols::Add(symtab[sym].st_value, name, size, type);
hasSymbols = true;
}
}
return hasSymbols;
}
////////////////////////////////////////////////////////////////////////////////////////////////////
// Loader namespace
namespace Loader {
/// AppLoader_ELF constructor
AppLoader_ELF::AppLoader_ELF(const std::string& filename) : is_loaded(false) {
this->filename = filename;
}
/// AppLoader_NCCH destructor
AppLoader_ELF::~AppLoader_ELF() {
}
/**
* Loads an NCCH file (e.g. from a CCI, or the first NCCH in a CXI)
* @param error_string Pointer to string to put error message if an error has occurred
* @todo Move NCSD parsing out of here and create a separate function for loading these
* @return True on success, otherwise false
*/
ResultStatus AppLoader_ELF::Load() {
INFO_LOG(LOADER, "Loading ELF file %s...", filename.c_str());
if (is_loaded)
return ResultStatus::ErrorAlreadyLoaded;
File::IOFile file(filename, "rb");
if (file.IsOpen()) {
u32 size = (u32)file.GetSize();
std::unique_ptr<u8[]> buffer(new u8[size]);
file.ReadBytes(&buffer[0], size);
ElfReader elf_reader(&buffer[0]);
elf_reader.LoadInto(0x00100000);
Kernel::LoadExec(elf_reader.GetEntryPoint());
} else {
return ResultStatus::Error;
}
return ResultStatus::Success;
}
} // namespace Loader

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// Copyright 2013 Dolphin Emulator Project / Citra Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
#pragma once
#include "common/common_types.h"
#include "core/loader/loader.h"
////////////////////////////////////////////////////////////////////////////////////////////////////
// Loader namespace
namespace Loader {
/// Loads an ELF/AXF file
class AppLoader_ELF : public AppLoader {
public:
AppLoader_ELF(const std::string& filename);
~AppLoader_ELF();
/**
* Load the bootable file
* @return ResultStatus result of function
*/
ResultStatus Load();
private:
std::string filename;
bool is_loaded;
};
} // namespace Loader

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// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
#include <memory>
#include "core/loader/loader.h"
#include "core/loader/elf.h"
#include "core/loader/ncch.h"
////////////////////////////////////////////////////////////////////////////////////////////////////
namespace Loader {
/**
* Identifies the type of a bootable file
* @param filename String filename of bootable file
* @todo (ShizZy) this function sucks... make it actually check file contents etc.
* @return FileType of file
*/
FileType IdentifyFile(const std::string &filename) {
if (filename.size() == 0) {
ERROR_LOG(LOADER, "invalid filename %s", filename.c_str());
return FileType::Error;
}
std::string extension = filename.size() >= 5 ? filename.substr(filename.size() - 4) : "";
if (!strcasecmp(extension.c_str(), ".elf")) {
return FileType::ELF; // TODO(bunnei): Do some filetype checking :p
}
else if (!strcasecmp(extension.c_str(), ".axf")) {
return FileType::ELF; // TODO(bunnei): Do some filetype checking :p
}
else if (!strcasecmp(extension.c_str(), ".cxi")) {
return FileType::CXI; // TODO(bunnei): Do some filetype checking :p
}
else if (!strcasecmp(extension.c_str(), ".cci")) {
return FileType::CCI; // TODO(bunnei): Do some filetype checking :p
}
return FileType::Unknown;
}
/**
* Identifies and loads a bootable file
* @param filename String filename of bootable file
* @return ResultStatus result of function
*/
ResultStatus LoadFile(const std::string& filename) {
INFO_LOG(LOADER, "Loading file %s...", filename.c_str());
switch (IdentifyFile(filename)) {
// Standard ELF file format...
case FileType::ELF: {
return AppLoader_ELF(filename).Load();
}
// NCCH/NCSD container formats...
case FileType::CXI:
case FileType::CCI: {
return AppLoader_NCCH(filename).Load();
}
// Error occurred durring IdentifyFile...
case FileType::Error:
// IdentifyFile could know identify file type...
case FileType::Unknown:
default:
return ResultStatus::ErrorInvalidFormat;
}
return ResultStatus::Error;
}
} // namespace Loader

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// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
#pragma once
#include <vector>
#include "common/common.h"
////////////////////////////////////////////////////////////////////////////////////////////////////
// Loader namespace
namespace Loader {
/// File types supported by CTR
enum class FileType {
Error,
Unknown,
CCI,
CXI,
CIA,
ELF,
};
/// Return type for functions in Loader namespace
enum class ResultStatus {
Success,
Error,
ErrorInvalidFormat,
ErrorNotImplemented,
ErrorNotLoaded,
ErrorNotUsed,
ErrorAlreadyLoaded,
};
/// Interface for loading an application
class AppLoader : NonCopyable {
public:
AppLoader() { }
virtual ~AppLoader() { }
/**
* Load the application
* @return ResultStatus result of function
*/
virtual ResultStatus Load() = 0;
/**
* Get the code (typically .code section) of the application
* @param error ResultStatus result of function
* @return Reference to code buffer
*/
virtual const std::vector<u8>& ReadCode(ResultStatus& error) const {
error = ResultStatus::ErrorNotImplemented;
return code;
}
/**
* Get the icon (typically icon section) of the application
* @param error ResultStatus result of function
* @return Reference to icon buffer
*/
virtual const std::vector<u8>& ReadIcon(ResultStatus& error) const {
error = ResultStatus::ErrorNotImplemented;
return icon;
}
/**
* Get the banner (typically banner section) of the application
* @param error ResultStatus result of function
* @return Reference to banner buffer
*/
virtual const std::vector<u8>& ReadBanner(ResultStatus& error) const {
error = ResultStatus::ErrorNotImplemented;
return banner;
}
/**
* Get the logo (typically logo section) of the application
* @param error ResultStatus result of function
* @return Reference to logo buffer
*/
virtual const std::vector<u8>& ReadLogo(ResultStatus& error) const {
error = ResultStatus::ErrorNotImplemented;
return logo;
}
/**
* Get the RomFs archive of the application
* @param error ResultStatus result of function
* @return Reference to RomFs archive buffer
*/
virtual const std::vector<u8>& ReadRomFS(ResultStatus& error) const {
error = ResultStatus::ErrorNotImplemented;
return romfs;
}
protected:
std::vector<u8> code; ///< ExeFS .code section
std::vector<u8> icon; ///< ExeFS .icon section
std::vector<u8> banner; ///< ExeFS .banner section
std::vector<u8> logo; ///< ExeFS .logo section
std::vector<u8> romfs; ///< RomFs archive
};
/**
* Identifies the type of a bootable file
* @param filename String filename of bootable file
* @return FileType of file
*/
FileType IdentifyFile(const std::string &filename);
/**
* Identifies and loads a bootable file
* @param filename String filename of bootable file
* @return ResultStatus result of function
*/
ResultStatus LoadFile(const std::string& filename);
} // namespace

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// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
#include <memory>
#include "common/file_util.h"
#include "core/loader/ncch.h"
#include "core/hle/kernel/kernel.h"
#include "core/mem_map.h"
////////////////////////////////////////////////////////////////////////////////////////////////////
// Loader namespace
namespace Loader {
static const int kMaxSections = 8; ///< Maximum number of sections (files) in an ExeFs
static const int kBlockSize = 0x200; ///< Size of ExeFS blocks (in bytes)
/**
* Get the decompressed size of an LZSS compressed ExeFS file
* @param buffer Buffer of compressed file
* @param size Size of compressed buffer
* @return Size of decompressed buffer
*/
u32 LZSS_GetDecompressedSize(u8* buffer, u32 size) {
u32 offset_size = *(u32*)(buffer + size - 4);
return offset_size + size;
}
/**
* Decompress ExeFS file (compressed with LZSS)
* @param compressed Compressed buffer
* @param compressed_size Size of compressed buffer
* @param decompressed Decompressed buffer
* @param decompressed_size Size of decompressed buffer
* @return True on success, otherwise false
*/
bool LZSS_Decompress(u8* compressed, u32 compressed_size, u8* decompressed, u32 decompressed_size) {
u8* footer = compressed + compressed_size - 8;
u32 buffer_top_and_bottom = *(u32*)footer;
u32 i, j;
u32 out = decompressed_size;
u32 index = compressed_size - ((buffer_top_and_bottom >> 24) & 0xFF);
u8 control;
u32 stop_index = compressed_size - (buffer_top_and_bottom & 0xFFFFFF);
memset(decompressed, 0, decompressed_size);
memcpy(decompressed, compressed, compressed_size);
while(index > stop_index) {
control = compressed[--index];
for(i = 0; i < 8; i++) {
if(index <= stop_index)
break;
if(index <= 0)
break;
if(out <= 0)
break;
if(control & 0x80) {
// Check if compression is out of bounds
if(index < 2) {
return false;
}
index -= 2;
u32 segment_offset = compressed[index] | (compressed[index + 1] << 8);
u32 segment_size = ((segment_offset >> 12) & 15) + 3;
segment_offset &= 0x0FFF;
segment_offset += 2;
// Check if compression is out of bounds
if(out < segment_size) {
return false;
}
for(j = 0; j < segment_size; j++) {
u8 data;
// Check if compression is out of bounds
if(out + segment_offset >= decompressed_size) {
return false;
}
data = decompressed[out + segment_offset];
decompressed[--out] = data;
}
} else {
// Check if compression is out of bounds
if(out < 1) {
return false;
}
decompressed[--out] = compressed[--index];
}
control <<= 1;
}
}
return true;
}
////////////////////////////////////////////////////////////////////////////////////////////////////
// AppLoader_NCCH class
/// AppLoader_NCCH constructor
AppLoader_NCCH::AppLoader_NCCH(const std::string& filename) {
this->filename = filename;
is_loaded = false;
is_compressed = false;
entry_point = 0;
ncch_offset = 0;
exefs_offset = 0;
}
/// AppLoader_NCCH destructor
AppLoader_NCCH::~AppLoader_NCCH() {
if (file.IsOpen())
file.Close();
}
/**
* Loads .code section into memory for booting
* @return ResultStatus result of function
*/
ResultStatus AppLoader_NCCH::LoadExec() {
if (!is_loaded)
return ResultStatus::ErrorNotLoaded;
ResultStatus res;
code = ReadCode(res);
if (ResultStatus::Success == res) {
Memory::WriteBlock(entry_point, &code[0], code.size());
Kernel::LoadExec(entry_point);
}
return res;
}
/**
* Reads an application ExeFS section of an NCCH file into AppLoader (e.g. .code, .logo, etc.)
* @param name Name of section to read out of NCCH file
* @param buffer Vector to read data into
* @param error ResultStatus result of function
* @return Reference to buffer of data that was read
*/
const std::vector<u8>& AppLoader_NCCH::LoadSectionExeFS(const char* name, std::vector<u8>& buffer,
ResultStatus& error) {
// Iterate through the ExeFs archive until we find the .code file...
for (int i = 0; i < kMaxSections; i++) {
// Load the specified section...
if (strcmp((const char*)exefs_header.section[i].name, name) == 0) {
INFO_LOG(LOADER, "ExeFS section %d:", i);
INFO_LOG(LOADER, " name: %s", exefs_header.section[i].name);
INFO_LOG(LOADER, " offset: 0x%08X", exefs_header.section[i].offset);
INFO_LOG(LOADER, " size: 0x%08X", exefs_header.section[i].size);
s64 section_offset = (exefs_header.section[i].offset + exefs_offset +
sizeof(ExeFs_Header) + ncch_offset);
file.Seek(section_offset, 0);
// Section is compressed...
if (i == 0 && is_compressed) {
// Read compressed .code section...
std::unique_ptr<u8[]> temp_buffer(new u8[exefs_header.section[i].size]);
file.ReadBytes(&temp_buffer[0], exefs_header.section[i].size);
// Decompress .code section...
u32 decompressed_size = LZSS_GetDecompressedSize(&temp_buffer[0],
exefs_header.section[i].size);
buffer.resize(decompressed_size);
if (!LZSS_Decompress(&temp_buffer[0], exefs_header.section[i].size, &buffer[0],
decompressed_size)) {
error = ResultStatus::ErrorInvalidFormat;
return buffer;
}
// Section is uncompressed...
} else {
buffer.resize(exefs_header.section[i].size);
file.ReadBytes(&buffer[0], exefs_header.section[i].size);
}
error = ResultStatus::Success;
return buffer;
}
}
error = ResultStatus::ErrorNotUsed;
return buffer;
}
/**
* Loads an NCCH file (e.g. from a CCI, or the first NCCH in a CXI)
* @param error_string Pointer to string to put error message if an error has occurred
* @todo Move NCSD parsing out of here and create a separate function for loading these
* @return True on success, otherwise false
*/
ResultStatus AppLoader_NCCH::Load() {
INFO_LOG(LOADER, "Loading NCCH file %s...", filename.c_str());
if (is_loaded)
return ResultStatus::ErrorAlreadyLoaded;
file = File::IOFile(filename, "rb");
if (file.IsOpen()) {
file.ReadBytes(&ncch_header, sizeof(NCCH_Header));
// Skip NCSD header and load first NCCH (NCSD is just a container of NCCH files)...
if (0 == memcmp(&ncch_header.magic, "NCSD", 4)) {
WARN_LOG(LOADER, "Only loading the first (bootable) NCCH within the NCSD file!");
ncch_offset = 0x4000;
file.Seek(ncch_offset, 0);
file.ReadBytes(&ncch_header, sizeof(NCCH_Header));
}
// Verify we are loading the correct file type...
if (0 != memcmp(&ncch_header.magic, "NCCH", 4))
return ResultStatus::ErrorInvalidFormat;
// Read ExHeader...
file.ReadBytes(&exheader_header, sizeof(ExHeader_Header));
is_compressed = (exheader_header.codeset_info.flags.flag & 1) == 1;
entry_point = exheader_header.codeset_info.text.address;
INFO_LOG(LOADER, "Name: %s", exheader_header.codeset_info.name);
INFO_LOG(LOADER, "Code compressed: %s", is_compressed ? "yes" : "no");
INFO_LOG(LOADER, "Entry point: 0x%08X", entry_point);
// Read ExeFS...
exefs_offset = ncch_header.exefs_offset * kBlockSize;
u32 exefs_size = ncch_header.exefs_size * kBlockSize;
INFO_LOG(LOADER, "ExeFS offset: 0x%08X", exefs_offset);
INFO_LOG(LOADER, "ExeFS size: 0x%08X", exefs_size);
file.Seek(exefs_offset + ncch_offset, 0);
file.ReadBytes(&exefs_header, sizeof(ExeFs_Header));
is_loaded = true; // Set state to loaded
LoadExec(); // Load the executable into memory for booting
return ResultStatus::Success;
}
return ResultStatus::Error;
}
/**
* Get the code (typically .code section) of the application
* @param error ResultStatus result of function
* @return Reference to code buffer
*/
const std::vector<u8>& AppLoader_NCCH::ReadCode(ResultStatus& error) {
return LoadSectionExeFS(".code", code, error);
}
/**
* Get the icon (typically icon section) of the application
* @param error ResultStatus result of function
* @return Reference to icon buffer
*/
const std::vector<u8>& AppLoader_NCCH::ReadIcon(ResultStatus& error) {
return LoadSectionExeFS("icon", icon, error);
}
/**
* Get the banner (typically banner section) of the application
* @param error ResultStatus result of function
* @return Reference to banner buffer
*/
const std::vector<u8>& AppLoader_NCCH::ReadBanner(ResultStatus& error) {
return LoadSectionExeFS("banner", banner, error);
}
/**
* Get the logo (typically logo section) of the application
* @param error ResultStatus result of function
* @return Reference to logo buffer
*/
const std::vector<u8>& AppLoader_NCCH::ReadLogo(ResultStatus& error) {
return LoadSectionExeFS("logo", logo, error);
}
/**
* Get the RomFs archive of the application
* @param error ResultStatus result of function
* @return Reference to RomFs archive buffer
*/
const std::vector<u8>& AppLoader_NCCH::ReadRomFS(ResultStatus& error) {
// Check if the NCCH has a RomFS...
if (ncch_header.romfs_offset != 0 && ncch_header.romfs_size != 0) {
u32 romfs_offset = ncch_offset + (ncch_header.romfs_offset * kBlockSize) + 0x1000;
u32 romfs_size = (ncch_header.romfs_size * kBlockSize) - 0x1000;
INFO_LOG(LOADER, "RomFS offset: 0x%08X", romfs_offset);
INFO_LOG(LOADER, "RomFS size: 0x%08X", romfs_size);
romfs.resize(romfs_size);
file.Seek(romfs_offset, 0);
file.ReadBytes(&romfs[0], romfs_size);
error = ResultStatus::Success;
return romfs;
} else {
NOTICE_LOG(LOADER, "RomFS unused");
}
error = ResultStatus::ErrorNotUsed;
return romfs;
}
} // namespace Loader

227
src/core/loader/ncch.h Normal file
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@ -0,0 +1,227 @@
// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
#pragma once
#include "common/common.h"
#include "common/file_util.h"
#include "core/loader/loader.h"
////////////////////////////////////////////////////////////////////////////////////////////////////
/// NCCH header (Note: "NCCH" appears to be a publically unknown acronym)
struct NCCH_Header {
u8 signature[0x100];
char magic[4];
u32 content_size;
u8 partition_id[8];
u16 maker_code;
u16 version;
u8 reserved_0[4];
u8 program_id[8];
u8 temp_flag;
u8 reserved_1[0x2f];
u8 product_code[0x10];
u8 extended_header_hash[0x20];
u32 extended_header_size;
u8 reserved_2[4];
u8 flags[8];
u32 plain_region_offset;
u32 plain_region_size;
u8 reserved_3[8];
u32 exefs_offset;
u32 exefs_size;
u32 exefs_hash_region_size;
u8 reserved_4[4];
u32 romfs_offset;
u32 romfs_size;
u32 romfs_hash_region_size;
u8 reserved_5[4];
u8 exefs_super_block_hash[0x20];
u8 romfs_super_block_hash[0x20];
};
////////////////////////////////////////////////////////////////////////////////////////////////////
// ExeFS (executable file system) headers
typedef struct {
char name[8];
u32 offset;
u32 size;
} ExeFs_SectionHeader;
typedef struct {
ExeFs_SectionHeader section[8];
u8 reserved[0x80];
u8 hashes[8][0x20];
} ExeFs_Header;
////////////////////////////////////////////////////////////////////////////////////////////////////
// ExHeader (executable file system header) headers
struct ExHeader_SystemInfoFlags{
u8 reserved[5];
u8 flag;
u8 remaster_version[2];
};
struct ExHeader_CodeSegmentInfo{
u32 address;
u32 num_max_pages;
u32 code_size;
};
struct ExHeader_CodeSetInfo {
u8 name[8];
ExHeader_SystemInfoFlags flags;
ExHeader_CodeSegmentInfo text;
u8 stacksize[4];
ExHeader_CodeSegmentInfo ro;
u8 reserved[4];
ExHeader_CodeSegmentInfo data;
u8 bsssize[4];
};
struct ExHeader_DependencyList{
u8 program_id[0x30][8];
};
struct ExHeader_SystemInfo{
u32 save_data_size;
u8 reserved[4];
u8 jump_id[8];
u8 reserved_2[0x30];
};
struct ExHeader_StorageInfo{
u8 ext_save_data_id[8];
u8 system_save_data_id[8];
u8 reserved[8];
u8 access_info[7];
u8 other_attributes;
};
struct ExHeader_ARM11_SystemLocalCaps{
u8 program_id[8];
u8 flags[8];
u8 resource_limit_descriptor[0x10][2];
ExHeader_StorageInfo storage_info;
u8 service_access_control[0x20][8];
u8 reserved[0x1f];
u8 resource_limit_category;
};
struct ExHeader_ARM11_KernelCaps{
u8 descriptors[28][4];
u8 reserved[0x10];
};
struct ExHeader_ARM9_AccessControl{
u8 descriptors[15];
u8 descversion;
};
struct ExHeader_Header{
ExHeader_CodeSetInfo codeset_info;
ExHeader_DependencyList dependency_list;
ExHeader_SystemInfo system_info;
ExHeader_ARM11_SystemLocalCaps arm11_system_local_caps;
ExHeader_ARM11_KernelCaps arm11_kernel_caps;
ExHeader_ARM9_AccessControl arm9_access_control;
struct {
u8 signature[0x100];
u8 ncch_public_key_modulus[0x100];
ExHeader_ARM11_SystemLocalCaps arm11_system_local_caps;
ExHeader_ARM11_KernelCaps arm11_kernel_caps;
ExHeader_ARM9_AccessControl arm9_access_control;
} access_desc;
};
////////////////////////////////////////////////////////////////////////////////////////////////////
// Loader namespace
namespace Loader {
/// Loads an NCCH file (e.g. from a CCI, or the first NCCH in a CXI)
class AppLoader_NCCH : public AppLoader {
public:
AppLoader_NCCH(const std::string& filename);
~AppLoader_NCCH();
/**
* Load the application
* @return ResultStatus result of function
*/
ResultStatus Load();
/**
* Get the code (typically .code section) of the application
* @param error ResultStatus result of function
* @return Reference to code buffer
*/
const std::vector<u8>& ReadCode(ResultStatus& error);
/**
* Get the icon (typically icon section) of the application
* @param error ResultStatus result of function
* @return Reference to icon buffer
*/
const std::vector<u8>& ReadIcon(ResultStatus& error);
/**
* Get the banner (typically banner section) of the application
* @param error ResultStatus result of function
* @return Reference to banner buffer
*/
const std::vector<u8>& ReadBanner(ResultStatus& error);
/**
* Get the logo (typically logo section) of the application
* @param error ResultStatus result of function
* @return Reference to logo buffer
*/
const std::vector<u8>& ReadLogo(ResultStatus& error);
/**
* Get the RomFs archive of the application
* @param error ResultStatus result of function
* @return Reference to RomFs archive buffer
*/
const std::vector<u8>& ReadRomFS(ResultStatus& error);
private:
/**
* Reads an application ExeFS section of an NCCH file into AppLoader (e.g. .code, .logo, etc.)
* @param name Name of section to read out of NCCH file
* @param buffer Vector to read data into
* @param error ResultStatus result of function
* @return Reference to buffer of data that was read
*/
const std::vector<u8>& LoadSectionExeFS(const char* name, std::vector<u8>& buffer,
ResultStatus& error);
/**
* Loads .code section into memory for booting
* @return ResultStatus result of function
*/
ResultStatus LoadExec();
File::IOFile file;
std::string filename;
bool is_loaded;
bool is_compressed;
u32 entry_point;
u32 ncch_offset; // Offset to NCCH header, can be 0 or after NCSD header
u32 exefs_offset;
NCCH_Header ncch_header;
ExeFs_Header exefs_header;
ExHeader_Header exheader_header;
};
} // namespace Loader

2
src/core/mem_map.h
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@ -139,6 +139,8 @@ void Write8(const u32 addr, const u8 data);
void Write16(const u32 addr, const u16 data);
void Write32(const u32 addr, const u32 data);
void WriteBlock(const u32 addr, const u8* data, const int size);
u8* GetPointer(const u32 Address);
/**

12
src/core/mem_map_funcs.cpp
View File

@ -293,4 +293,16 @@ void Write64(const u32 addr, const u64 data) {
_Write<u64_le>(addr, data);
}
void WriteBlock(const u32 addr, const u8* data, const int size) {
int offset = 0;
while (offset < (size & ~3))
Write32(addr + offset, *(u32*)&data[offset += 4]);
if (size & 2)
Write16(addr + offset, *(u16*)&data[offset += 2]);
if (size & 1)
Write8(addr + offset, data[offset]);
}
} // namespace