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Merge pull request #259 from ichfly/master

Loader: Add 3DSX support
This commit is contained in:
bunnei 2014-12-08 19:16:40 -05:00
commit ff560a9428
6 changed files with 279 additions and 1 deletions

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@ -164,7 +164,7 @@ void GMainWindow::BootGame(std::string filename)
void GMainWindow::OnMenuLoadFile()
{
QString filename = QFileDialog::getOpenFileName(this, tr("Load file"), QString(), tr("3DS executable (*.elf *.axf *.bin *.cci *.cxi)"));
QString filename = QFileDialog::getOpenFileName(this, tr("Load file"), QString(), tr("3DS executable (*.3dsx *.elf *.axf *.bin *.cci *.cxi)"));
if (filename.size())
BootGame(filename.toLatin1().data());
}

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@ -63,6 +63,7 @@ set(SRCS
loader/elf.cpp
loader/loader.cpp
loader/ncch.cpp
loader/3dsx.cpp
core.cpp
core_timing.cpp
mem_map.cpp
@ -143,6 +144,7 @@ set(HEADERS
loader/elf.h
loader/loader.h
loader/ncch.h
loader/3dsx.h
core.h
core_timing.h
mem_map.h

236
src/core/loader/3dsx.cpp Normal file
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@ -0,0 +1,236 @@
// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#include <algorithm>
#include <vector>
#include "core/file_sys/archive_romfs.h"
#include "core/loader/elf.h"
#include "core/loader/ncch.h"
#include "core/hle/kernel/archive.h"
#include "core/mem_map.h"
#include "3dsx.h"
namespace Loader {
/**
* File layout:
* - File header
* - Code, rodata and data relocation table headers
* - Code segment
* - Rodata segment
* - Loadable (non-BSS) part of the data segment
* - Code relocation table
* - Rodata relocation table
* - Data relocation table
*
* Memory layout before relocations are applied:
* [0..codeSegSize) -> code segment
* [codeSegSize..rodataSegSize) -> rodata segment
* [rodataSegSize..dataSegSize) -> data segment
*
* Memory layout after relocations are applied: well, however the loader sets it up :)
* The entrypoint is always the start of the code segment.
* The BSS section must be cleared manually by the application.
*/
enum THREEDSX_Error {
ERROR_NONE = 0,
ERROR_READ = 1,
ERROR_FILE = 2,
ERROR_ALLOC = 3
};
static const u32 RELOCBUFSIZE = 512;
// File header
static const u32 THREEDSX_MAGIC = 0x58534433; // '3DSX'
#pragma pack(1)
struct THREEDSX_Header
{
u32 magic;
u16 header_size, reloc_hdr_size;
u32 format_ver;
u32 flags;
// Sizes of the code, rodata and data segments +
// size of the BSS section (uninitialized latter half of the data segment)
u32 code_seg_size, rodata_seg_size, data_seg_size, bss_size;
};
// Relocation header: all fields (even extra unknown fields) are guaranteed to be relocation counts.
struct THREEDSX_RelocHdr
{
// # of absolute relocations (that is, fix address to post-relocation memory layout)
u32 cross_segment_absolute;
// # of cross-segment relative relocations (that is, 32bit signed offsets that need to be patched)
u32 cross_segment_relative;
// more?
// Relocations are written in this order:
// - Absolute relocations
// - Relative relocations
};
// Relocation entry: from the current pointer, skip X words and patch Y words
struct THREEDSX_Reloc
{
u16 skip, patch;
};
#pragma pack()
struct THREEloadinfo
{
u8* seg_ptrs[3]; // code, rodata & data
u32 seg_addrs[3];
u32 seg_sizes[3];
};
class THREEDSXReader {
public:
static int Load3DSXFile(const std::string& filename, u32 base_addr);
};
static u32 TranslateAddr(u32 addr, THREEloadinfo *loadinfo, u32* offsets)
{
if (addr < offsets[0])
return loadinfo->seg_addrs[0] + addr;
if (addr < offsets[1])
return loadinfo->seg_addrs[1] + addr - offsets[0];
return loadinfo->seg_addrs[2] + addr - offsets[1];
}
int THREEDSXReader::Load3DSXFile(const std::string& filename, u32 base_addr)
{
FileUtil::IOFile file(filename, "rb");
if (!file.IsOpen()) {
return ERROR_FILE;
}
THREEDSX_Header hdr;
if (file.ReadBytes(&hdr, sizeof(hdr)) != sizeof(hdr))
return ERROR_READ;
THREEloadinfo loadinfo;
//loadinfo segments must be a multiple of 0x1000
loadinfo.seg_sizes[0] = (hdr.code_seg_size + 0xFFF) &~0xFFF;
loadinfo.seg_sizes[1] = (hdr.rodata_seg_size + 0xFFF) &~0xFFF;
loadinfo.seg_sizes[2] = (hdr.data_seg_size + 0xFFF) &~0xFFF;
u32 offsets[2] = { loadinfo.seg_sizes[0], loadinfo.seg_sizes[0] + loadinfo.seg_sizes[1] };
u32 data_load_size = (hdr.data_seg_size - hdr.bss_size + 0xFFF) &~0xFFF;
u32 bss_load_size = loadinfo.seg_sizes[2] - data_load_size;
u32 n_reloc_tables = hdr.reloc_hdr_size / 4;
std::vector<u8> all_mem(loadinfo.seg_sizes[0] + loadinfo.seg_sizes[1] + loadinfo.seg_sizes[2] + 3 * n_reloc_tables);
loadinfo.seg_addrs[0] = base_addr;
loadinfo.seg_addrs[1] = loadinfo.seg_addrs[0] + loadinfo.seg_sizes[0];
loadinfo.seg_addrs[2] = loadinfo.seg_addrs[1] + loadinfo.seg_sizes[1];
loadinfo.seg_ptrs[0] = &all_mem[0];
loadinfo.seg_ptrs[1] = loadinfo.seg_ptrs[0] + loadinfo.seg_sizes[0];
loadinfo.seg_ptrs[2] = loadinfo.seg_ptrs[1] + loadinfo.seg_sizes[1];
// Skip header for future compatibility
file.Seek(hdr.header_size, SEEK_SET);
// Read the relocation headers
u32* relocs = (u32*)(loadinfo.seg_ptrs[2] + hdr.data_seg_size);
for (u32 current_segment = 0; current_segment < 3; current_segment++) {
if (file.ReadBytes(&relocs[current_segment*n_reloc_tables], n_reloc_tables * 4) != n_reloc_tables * 4)
return ERROR_READ;
}
// Read the segments
if (file.ReadBytes(loadinfo.seg_ptrs[0], hdr.code_seg_size) != hdr.code_seg_size)
return ERROR_READ;
if (file.ReadBytes(loadinfo.seg_ptrs[1], hdr.rodata_seg_size) != hdr.rodata_seg_size)
return ERROR_READ;
if (file.ReadBytes(loadinfo.seg_ptrs[2], hdr.data_seg_size - hdr.bss_size) != hdr.data_seg_size - hdr.bss_size)
return ERROR_READ;
// BSS clear
memset((char*)loadinfo.seg_ptrs[2] + hdr.data_seg_size - hdr.bss_size, 0, hdr.bss_size);
// Relocate the segments
for (u32 current_segment = 0; current_segment < 3; current_segment++) {
for (u32 current_segment_reloc_table = 0; current_segment_reloc_table < n_reloc_tables; current_segment_reloc_table++) {
u32 n_relocs = relocs[current_segment*n_reloc_tables + current_segment_reloc_table];
if (current_segment_reloc_table >= 2) {
// We are not using this table - ignore it because we don't know what it dose
file.Seek(n_relocs*sizeof(THREEDSX_Reloc), SEEK_CUR);
continue;
}
static THREEDSX_Reloc reloc_table[RELOCBUFSIZE];
u32* pos = (u32*)loadinfo.seg_ptrs[current_segment];
u32* end_pos = pos + (loadinfo.seg_sizes[current_segment] / 4);
while (n_relocs) {
u32 remaining = std::min(RELOCBUFSIZE, n_relocs);
n_relocs -= remaining;
if (file.ReadBytes(reloc_table, remaining*sizeof(THREEDSX_Reloc)) != remaining*sizeof(THREEDSX_Reloc))
return ERROR_READ;
for (u32 current_inprogress = 0; current_inprogress < remaining && pos < end_pos; current_inprogress++) {
DEBUG_LOG(LOADER, "(t=%d,skip=%u,patch=%u)\n",
current_segment_reloc_table, (u32)reloc_table[current_inprogress].skip, (u32)reloc_table[current_inprogress].patch);
pos += reloc_table[current_inprogress].skip;
s32 num_patches = reloc_table[current_inprogress].patch;
while (0 < num_patches && pos < end_pos) {
u32 in_addr = (char*)pos - (char*)&all_mem[0];
u32 addr = TranslateAddr(*pos, &loadinfo, offsets);
DEBUG_LOG(LOADER, "Patching %08X <-- rel(%08X,%d) (%08X)\n",
base_addr + in_addr, addr, current_segment_reloc_table, *pos);
switch (current_segment_reloc_table) {
case 0: *pos = (addr); break;
case 1: *pos = (addr - in_addr); break;
default: break; //this should never happen
}
pos++;
num_patches--;
}
}
}
}
}
// Write the data
memcpy(Memory::GetPointer(base_addr), &all_mem[0], loadinfo.seg_sizes[0] + loadinfo.seg_sizes[1] + loadinfo.seg_sizes[2]);
DEBUG_LOG(LOADER, "CODE: %u pages\n", loadinfo.seg_sizes[0] / 0x1000);
DEBUG_LOG(LOADER, "RODATA: %u pages\n", loadinfo.seg_sizes[1] / 0x1000);
DEBUG_LOG(LOADER, "DATA: %u pages\n", data_load_size / 0x1000);
DEBUG_LOG(LOADER, "BSS: %u pages\n", bss_load_size / 0x1000);
return ERROR_NONE;
}
/// AppLoader_DSX constructor
AppLoader_THREEDSX::AppLoader_THREEDSX(const std::string& filename) : filename(filename) {
}
/// AppLoader_DSX destructor
AppLoader_THREEDSX::~AppLoader_THREEDSX() {
}
/**
* Loads a 3DSX file
* @return Success on success, otherwise Error
*/
ResultStatus AppLoader_THREEDSX::Load() {
INFO_LOG(LOADER, "Loading 3DSX file %s...", filename.c_str());
FileUtil::IOFile file(filename, "rb");
if (file.IsOpen()) {
THREEDSXReader reader;
reader.Load3DSXFile(filename, 0x00100000);
Kernel::LoadExec(0x00100000);
} else {
return ResultStatus::Error;
}
return ResultStatus::Success;
}
} // namespace Loader

32
src/core/loader/3dsx.h Normal file
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@ -0,0 +1,32 @@
// Copyright 2014 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 3DSX file
class AppLoader_THREEDSX final : public AppLoader {
public:
AppLoader_THREEDSX(const std::string& filename);
~AppLoader_THREEDSX() override;
/**
* Load the bootable file
* @return ResultStatus result of function
*/
ResultStatus Load() override;
private:
std::string filename;
bool is_loaded;
};
} // namespace Loader

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@ -5,6 +5,7 @@
#include <memory>
#include "core/file_sys/archive_romfs.h"
#include "core/loader/3dsx.h"
#include "core/loader/elf.h"
#include "core/loader/ncch.h"
#include "core/hle/kernel/archive.h"
@ -42,6 +43,8 @@ FileType IdentifyFile(const std::string &filename) {
return FileType::CCI;
} else if (extension == ".bin") {
return FileType::BIN;
} else if (extension == ".3dsx") {
return FileType::THREEDSX;
}
return FileType::Unknown;
}
@ -56,6 +59,10 @@ ResultStatus LoadFile(const std::string& filename) {
switch (IdentifyFile(filename)) {
//3DSX file format...
case FileType::THREEDSX:
return AppLoader_THREEDSX(filename).Load();
// Standard ELF file format...
case FileType::ELF:
return AppLoader_ELF(filename).Load();

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@ -22,6 +22,7 @@ enum class FileType {
CIA,
ELF,
BIN,
THREEDSX, //3DSX
};
/// Return type for functions in Loader namespace