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Loader: Cleaned up and removed unused code, refactored ELF namespace.

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This commit is contained in:
bunnei 2014-06-16 23:18:10 -04:00
parent 1da361c7ab
commit 13bdaa6c60
4 changed files with 70 additions and 209 deletions
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107
src/core/loader/elf.cpp
View file

@ -5,65 +5,17 @@
#include <string>
#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"
//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)
{
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);
@ -73,8 +25,7 @@ ElfReader::ElfReader(void *ptr)
LoadSymbols();
}
const char *ElfReader::GetSectionName(int section) const
{
const char *ElfReader::GetSectionName(int section) const {
if (sections[section].sh_type == SHT_NULL)
return nullptr;
@ -87,8 +38,7 @@ const char *ElfReader::GetSectionName(int section) const
return nullptr;
}
bool ElfReader::LoadInto(u32 vaddr)
{
bool ElfReader::LoadInto(u32 vaddr) {
DEBUG_LOG(MASTER_LOG, "String section: %i", header->e_shstrndx);
// Should we relocate?
@ -188,3 +138,48 @@ bool ElfReader::LoadSymbols()
return hasSymbols;
}
////////////////////////////////////////////////////////////////////////////////////////////////////
// Loader namespace
namespace Loader {
/**
* Loads an ELF file
* @param filename String filename of ELF file
* @param error_string Pointer to string to put error message if an error has occurred
* @return True on success, otherwise false
*/
bool Load_ELF(std::string& filename, std::string* error_string) {
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()) {
u32 size = (u32)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 {
*error_string = "Unable to open ELF file!";
return false;
}
f.Close();
return true;
}
} // namespace Loader

15
src/core/loader/elf.h
View file

@ -329,3 +329,18 @@ public:
return bRelocate;
}
};
////////////////////////////////////////////////////////////////////////////////////////////////////
// Loader namespace
namespace Loader {
/**
* Loads an ELF file
* @param filename String filename of ELF file
* @param error_string Pointer to string to put error message if an error has occurred
* @return True on success, otherwise false
*/
bool Load_ELF(std::string& filename, std::string* error_string);
} // namespace Loader

142
src/core/loader/loader.cpp
View file

@ -2,98 +2,14 @@
// Licensed under GPLv2
// Refer to the license.txt file included.
#include "common/common_types.h"
#include "common/file_util.h"
#include "core/loader/loader.h"
#include "core/loader/elf.h"
#include "core/loader/ncch.h"
#include "core/system.h"
#include "core/core.h"
#include "core/hle/kernel/kernel.h"
#include "core/mem_map.h"
////////////////////////////////////////////////////////////////////////////////////////////////////
/// 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 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
@ -107,15 +23,7 @@ FileType IdentifyFile(std::string &filename) {
}
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")) {
if (!strcasecmp(extension.c_str(), ".elf")) {
return FILETYPE_CTR_ELF; // TODO(bunnei): Do some filetype checking :p
}
else if (!strcasecmp(extension.c_str(), ".axf")) {
@ -127,24 +35,6 @@ FileType IdentifyFile(std::string &filename) {
else if (!strcasecmp(extension.c_str(), ".cci")) {
return FILETYPE_CTR_CCI; // 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;
}
@ -161,10 +51,7 @@ bool LoadFile(std::string &filename, std::string *error_string) {
switch (IdentifyFile(filename)) {
case FILETYPE_CTR_ELF:
return Load_ELF(filename);
case FILETYPE_CTR_BIN:
return Load_BIN(filename);
return Loader::Load_ELF(filename, error_string);
case FILETYPE_CTR_CXI:
case FILETYPE_CTR_CCI:
@ -175,29 +62,6 @@ bool LoadFile(std::string &filename, std::string *error_string) {
*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");
@ -207,4 +71,4 @@ bool LoadFile(std::string &filename, std::string *error_string) {
return false;
}
} // namespace
} // namespace Loader

15
src/core/loader/loader.h
View file

@ -7,6 +7,7 @@
#include "common/common.h"
////////////////////////////////////////////////////////////////////////////////////////////////////
// Loader namespace
namespace Loader {
@ -19,23 +20,9 @@ enum FileType {
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