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haxchi/dsrom/hbl_loader/launcher.c

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#include "types.h"
#include "elf_abi.h"
#include "kexploit.h"
#include "structs.h"
#include "sd_loader.h"
#include "coreinit.h"
#define MEM_BASE 0xC0800000
#include "common.h"
#include "os_defs.h"
//! this shouldnt depend on OS
#define LIB_CODE_RW_BASE_OFFSET 0xC1000000
#define CODE_RW_BASE_OFFSET 0xC0000000
#define DATA_RW_BASE_OFFSET 0xC0000000
#define ADDRESS_OSTitle_main_entry_ptr 0x1005E040
#define ADDRESS_main_entry_hook 0x0101C56C
#define ROOTRPX_DBAT0U_VAL 0xC00003FF
#define COREINIT_DBAT0U_VAL 0xC20001FF
#define ROOTRPX_DBAT0L_VAL 0x30000012
#define COREINIT_DBAT0L_VAL 0x32000012
#define address_LiWaitIopComplete 0x01010180
#define address_LiWaitIopCompleteWithInterrupts 0x0101006C
#define address_LiWaitOneChunk 0x0100080C
#define address_PrepareTitle_hook 0xFFF184E4
#define address_sgIsLoadingBuffer 0xEFE19E80
#define address_gDynloadInitialized 0xEFE13DBC
/* Install functions */
static void InstallMain(private_data_t *private_data);
static void InstallPatches(private_data_t *private_data);
static void PrepareScreen(private_data_t *private_data);
static void ExitFailure(private_data_t *private_data, const char *failure);
static void SetupKernelSyscall(unsigned int addr);
static void KernelCopyData(unsigned int addr, unsigned int src, unsigned int len);
/* assembly functions */
extern void SC_0x25_KernelCopyData(void* addr, void* src, unsigned int len);
extern void Syscall_0x36(void);
extern void KernelPatches(void);
/* ****************************************************************** */
/* ENTRY POINT */
/* ****************************************************************** */
void __main(void)
{
/* Get coreinit handle and keep it in memory */
unsigned int coreinit_handle;
OSDynLoad_Acquire("coreinit.rpl", &coreinit_handle);
/* Get our memory functions */
unsigned int* functionPointer;
void* (*p_memset)(void * dest, unsigned int value, unsigned int bytes);
OSDynLoad_FindExport(coreinit_handle, 0, "memset", &p_memset);
private_data_t private_data;
p_memset(&private_data, 0, sizeof(private_data_t));
private_data.coreinit_handle = coreinit_handle;
private_data.memset = p_memset;
private_data.data_elf = (unsigned char *) sd_loader_sd_loader_elf; // use this address as temporary to load the elf
OSDynLoad_FindExport(coreinit_handle, 1, "MEMAllocFromDefaultHeapEx", &functionPointer);
private_data.MEMAllocFromDefaultHeapEx = (void*(*)(unsigned int, unsigned int))*functionPointer;
OSDynLoad_FindExport(coreinit_handle, 1, "MEMFreeToDefaultHeap", &functionPointer);
private_data.MEMFreeToDefaultHeap = (void (*)(void *))*functionPointer;
OSDynLoad_FindExport(coreinit_handle, 0, "memcpy", &private_data.memcpy);
OSDynLoad_FindExport(coreinit_handle, 0, "OSEffectiveToPhysical", &private_data.OSEffectiveToPhysical);
OSDynLoad_FindExport(coreinit_handle, 0, "DCFlushRange", &private_data.DCFlushRange);
OSDynLoad_FindExport(coreinit_handle, 0, "ICInvalidateRange", &private_data.ICInvalidateRange);
OSDynLoad_FindExport(coreinit_handle, 0, "_Exit", &private_data._Exit);
/* do kernel exploit if needed */
if (private_data.OSEffectiveToPhysical((void *)0xa0000000) == (void *)0)
run_kexploit(&private_data);
/* Since we inited GX2 without initing the screen before do that now */
/* Without this the hbl load will have some screen corruptions */
PrepareScreen(&private_data);
/* Do SYSLaunchMiiStudio to boot HBL */
unsigned int sysapp_handle;
void (*SYSLaunchMiiStudio)(void) = 0;
OSDynLoad_Acquire("sysapp.rpl", &sysapp_handle);
OSDynLoad_FindExport(sysapp_handle, 0, "SYSLaunchMiiStudio", &SYSLaunchMiiStudio);
SYSLaunchMiiStudio();
/* setup kernel copy data syscall */
kern_write((void*)(KERN_SYSCALL_TBL_2 + (0x25 * 4)), (unsigned int)KernelCopyData);
/* Install our code now */
InstallMain(&private_data);
/* setup our own syscall and call it */
SetupKernelSyscall((unsigned int)KernelPatches);
Syscall_0x36();
/* Patch functions and our code for usage */
InstallPatches(&private_data);
/* Exit our core 0 thread to return to main */
void (*OSExitThread)(int);
OSDynLoad_FindExport(coreinit_handle, 0, "OSExitThread", &OSExitThread);
OSExitThread(0);
}
void PrepareScreen(private_data_t *private_data)
{
// Prepare screen
void (*OSScreenInit)();
unsigned int (*OSScreenGetBufferSizeEx)(unsigned int bufferNum);
unsigned int (*OSScreenSetBufferEx)(unsigned int bufferNum, void * addr);
unsigned int (*OSScreenClearBufferEx)(unsigned int bufferNum, unsigned int temp);
unsigned int (*OSScreenFlipBuffersEx)(unsigned int bufferNum);
OSDynLoad_FindExport(private_data->coreinit_handle, 0, "OSScreenInit", &OSScreenInit);
OSDynLoad_FindExport(private_data->coreinit_handle, 0, "OSScreenGetBufferSizeEx", &OSScreenGetBufferSizeEx);
OSDynLoad_FindExport(private_data->coreinit_handle, 0, "OSScreenSetBufferEx", &OSScreenSetBufferEx);
OSDynLoad_FindExport(private_data->coreinit_handle, 0, "OSScreenClearBufferEx", &OSScreenClearBufferEx);
OSDynLoad_FindExport(private_data->coreinit_handle, 0, "OSScreenFlipBuffersEx", &OSScreenFlipBuffersEx);
// Prepare screen
int screen_buf0_size = 0;
int screen_buf1_size = 0;
unsigned int screen_color = 0; // (r << 24) | (g << 16) | (b << 8) | a;
// Init screen and screen buffers
OSScreenInit();
screen_buf0_size = OSScreenGetBufferSizeEx(0);
screen_buf1_size = OSScreenGetBufferSizeEx(1);
OSScreenSetBufferEx(0, (void *)0xF4000000);
OSScreenSetBufferEx(1, (void *)0xF4000000 + screen_buf0_size);
// Clear screens
OSScreenClearBufferEx(0, screen_color);
OSScreenClearBufferEx(1, screen_color);
// Flush the cache
private_data->DCFlushRange((void *)0xF4000000, screen_buf0_size);
private_data->DCFlushRange((void *)0xF4000000 + screen_buf0_size, screen_buf1_size);
// Flip buffers
OSScreenFlipBuffersEx(0);
OSScreenFlipBuffersEx(1);
}
void ExitFailure(private_data_t *private_data, const char *failure)
{
/************************************************************************/
unsigned int (*OSScreenClearBufferEx)(unsigned int bufferNum, unsigned int temp);
unsigned int (*OSScreenFlipBuffersEx)(unsigned int bufferNum);
unsigned int (*OSScreenPutFontEx)(unsigned int bufferNum, unsigned int posX, unsigned int posY, const char * buffer);
OSDynLoad_FindExport(private_data->coreinit_handle, 0, "OSScreenClearBufferEx", &OSScreenClearBufferEx);
OSDynLoad_FindExport(private_data->coreinit_handle, 0, "OSScreenFlipBuffersEx", &OSScreenFlipBuffersEx);
OSDynLoad_FindExport(private_data->coreinit_handle, 0, "OSScreenPutFontEx", &OSScreenPutFontEx);
OSScreenPutFontEx(1, 0, 0, failure);
OSScreenFlipBuffersEx(1);
OSScreenClearBufferEx(1, 0);
unsigned int t1 = 0x3FFFFFFF;
while(t1--) asm volatile("nop");
private_data->_Exit(0);
}
/* *****************************************************************************
* Base functions
* ****************************************************************************/
static void SetupKernelSyscall(unsigned int address)
{
// Add syscall #0x36
kern_write((void*)(KERN_SYSCALL_TBL_2 + (0x36 * 4)), address);
// make kern_read/kern_write available in all places
kern_write((void*)(KERN_SYSCALL_TBL_1 + (0x34 * 4)), KERN_CODE_READ);
kern_write((void*)(KERN_SYSCALL_TBL_2 + (0x34 * 4)), KERN_CODE_READ);
kern_write((void*)(KERN_SYSCALL_TBL_3 + (0x34 * 4)), KERN_CODE_READ);
kern_write((void*)(KERN_SYSCALL_TBL_4 + (0x34 * 4)), KERN_CODE_READ);
kern_write((void*)(KERN_SYSCALL_TBL_1 + (0x35 * 4)), KERN_CODE_WRITE);
kern_write((void*)(KERN_SYSCALL_TBL_2 + (0x35 * 4)), KERN_CODE_WRITE);
kern_write((void*)(KERN_SYSCALL_TBL_3 + (0x35 * 4)), KERN_CODE_WRITE);
kern_write((void*)(KERN_SYSCALL_TBL_4 + (0x35 * 4)), KERN_CODE_WRITE);
}
static void KernelCopyData(unsigned int addr, unsigned int src, unsigned int len)
{
/*
* Setup a DBAT access for our 0xC0800000 area and our 0xBC000000 area which hold our variables like GAME_LAUNCHED and our BSS/rodata section
*/
register unsigned int dbatu0, dbatl0, target_dbat0u, target_dbat0l;
// setup mapping based on target address
if ((addr >= 0xC0000000) && (addr < 0xC2000000)) // root.rpx address
{
target_dbat0u = ROOTRPX_DBAT0U_VAL;
target_dbat0l = ROOTRPX_DBAT0L_VAL;
}
else if ((addr >= 0xC2000000) && (addr < 0xC3000000))
{
target_dbat0u = COREINIT_DBAT0U_VAL;
target_dbat0l = COREINIT_DBAT0L_VAL;
}
// save the original DBAT value
asm volatile("mfdbatu %0, 0" : "=r" (dbatu0));
asm volatile("mfdbatl %0, 0" : "=r" (dbatl0));
asm volatile("mtdbatu 0, %0" : : "r" (target_dbat0u));
asm volatile("mtdbatl 0, %0" : : "r" (target_dbat0l));
asm volatile("eieio; isync");
unsigned char *src_p = (unsigned char*)src;
unsigned char *dst_p = (unsigned char*)addr;
unsigned int i;
for(i = 0; i < len; i++)
{
dst_p[i] = src_p[i];
}
unsigned int flushAddr = addr & ~31;
while(flushAddr < (addr + len))
{
asm volatile("dcbf 0, %0; sync" : : "r"(flushAddr));
flushAddr += 0x20;
}
/*
* Restore original DBAT value
*/
asm volatile("mtdbatu 0, %0" : : "r" (dbatu0));
asm volatile("mtdbatl 0, %0" : : "r" (dbatl0));
asm volatile("eieio; isync");
}
static int strcmp(const char *s1, const char *s2)
{
while(*s1 && *s2)
{
if(*s1 != *s2) {
return -1;
}
s1++;
s2++;
}
if(*s1 != *s2) {
return -1;
}
return 0;
}
static unsigned int get_section(private_data_t *private_data, unsigned char *data, const char *name, unsigned int * size, unsigned int * addr, int fail_on_not_found)
{
Elf32_Ehdr *ehdr = (Elf32_Ehdr *) data;
if ( !data
|| !IS_ELF (*ehdr)
|| (ehdr->e_type != ET_EXEC)
|| (ehdr->e_machine != EM_PPC))
{
ExitFailure(private_data, "Invalid elf file");
}
Elf32_Shdr *shdr = (Elf32_Shdr *) (data + ehdr->e_shoff);
int i;
for(i = 0; i < ehdr->e_shnum; i++)
{
const char *section_name = ((const char*)data) + shdr[ehdr->e_shstrndx].sh_offset + shdr[i].sh_name;
if(strcmp(section_name, name) == 0)
{
if(addr)
*addr = shdr[i].sh_addr;
if(size)
*size = shdr[i].sh_size;
return shdr[i].sh_offset;
}
}
if(fail_on_not_found)
ExitFailure(private_data, (char*)name);
return 0;
}
/* ****************************************************************** */
/* INSTALL MAIN CODE */
/* ****************************************************************** */
static void InstallMain(private_data_t *private_data)
{
// get .text section
unsigned int main_text_addr = 0;
unsigned int main_text_len = 0;
unsigned int section_offset = get_section(private_data, private_data->data_elf, ".text", &main_text_len, &main_text_addr, 1);
unsigned char *main_text = private_data->data_elf + section_offset;
/* Copy main .text to memory */
if(section_offset > 0)
SC_0x25_KernelCopyData((void*)(CODE_RW_BASE_OFFSET + main_text_addr), main_text, main_text_len);
// get the .rodata section
unsigned int main_rodata_addr = 0;
unsigned int main_rodata_len = 0;
section_offset = get_section(private_data, private_data->data_elf, ".rodata", &main_rodata_len, &main_rodata_addr, 0);
if(section_offset > 0)
{
unsigned char *main_rodata = private_data->data_elf + section_offset;
/* Copy main rodata to memory */
SC_0x25_KernelCopyData((void*)(DATA_RW_BASE_OFFSET + main_rodata_addr), main_rodata, main_rodata_len);
}
// get the .data section
unsigned int main_data_addr = 0;
unsigned int main_data_len = 0;
section_offset = get_section(private_data, private_data->data_elf, ".data", &main_data_len, &main_data_addr, 0);
if(section_offset > 0)
{
unsigned char *main_data = private_data->data_elf + section_offset;
/* Copy main data to memory */
SC_0x25_KernelCopyData((void*)(DATA_RW_BASE_OFFSET + main_data_addr), main_data, main_data_len);
}
// get the .bss section
unsigned int main_bss_addr = 0;
unsigned int main_bss_len = 0;
section_offset = get_section(private_data, private_data->data_elf, ".bss", &main_bss_len, &main_bss_addr, 0);
if(section_offset > 0)
{
unsigned char *main_bss = private_data->data_elf + section_offset;
/* Copy main data to memory */
SC_0x25_KernelCopyData((void*)(DATA_RW_BASE_OFFSET + main_bss_addr), main_bss, main_bss_len);
}
}
/* ****************************************************************** */
/* INSTALL PATCHES */
/* All OS specific stuff is done here */
/* ****************************************************************** */
static void InstallPatches(private_data_t *private_data)
{
OsSpecifics osSpecificFunctions;
private_data->memset(&osSpecificFunctions, 0, sizeof(OsSpecifics));
unsigned int bufferU32;
/* Pre-setup a few options to defined values */
bufferU32 = VER;
SC_0x25_KernelCopyData((void*)&OS_FIRMWARE, &bufferU32, sizeof(bufferU32));
bufferU32 = 0xDEADC0DE;
SC_0x25_KernelCopyData((void*)&MAIN_ENTRY_ADDR, &bufferU32, sizeof(bufferU32));
SC_0x25_KernelCopyData((void*)&ELF_DATA_ADDR, &bufferU32, sizeof(bufferU32));
bufferU32 = 0;
SC_0x25_KernelCopyData((void*)&ELF_DATA_SIZE, &bufferU32, sizeof(bufferU32));
/* Related to sd-loader elf choice */
SC_0x25_KernelCopyData((void*)SD_LOADER_PATH, (void*)0xF5E70000, 250);
SC_0x25_KernelCopyData((void*)&SD_LOADER_FORCE_HBL, &bufferU32, sizeof(bufferU32));
unsigned int jump_main_hook = 0;
osSpecificFunctions.addr_OSDynLoad_Acquire = (unsigned int)OSDynLoad_Acquire;
osSpecificFunctions.addr_OSDynLoad_FindExport = (unsigned int)OSDynLoad_FindExport;
osSpecificFunctions.addr_KernSyscallTbl1 = KERN_SYSCALL_TBL_1;
osSpecificFunctions.addr_KernSyscallTbl2 = KERN_SYSCALL_TBL_2;
osSpecificFunctions.addr_KernSyscallTbl3 = KERN_SYSCALL_TBL_3;
osSpecificFunctions.addr_KernSyscallTbl4 = KERN_SYSCALL_TBL_4;
osSpecificFunctions.addr_KernSyscallTbl5 = KERN_SYSCALL_TBL_5;
osSpecificFunctions.LiWaitIopComplete = (int (*)(int, int *)) address_LiWaitIopComplete;
osSpecificFunctions.LiWaitIopCompleteWithInterrupts = (int (*)(int, int *)) address_LiWaitIopCompleteWithInterrupts;
osSpecificFunctions.addr_LiWaitOneChunk = address_LiWaitOneChunk;
osSpecificFunctions.addr_PrepareTitle_hook = address_PrepareTitle_hook;
osSpecificFunctions.addr_sgIsLoadingBuffer = address_sgIsLoadingBuffer;
osSpecificFunctions.addr_gDynloadInitialized = address_gDynloadInitialized;
osSpecificFunctions.orig_LiWaitOneChunkInstr = *(unsigned int*)address_LiWaitOneChunk;
//! pointer to main entry point of a title
osSpecificFunctions.addr_OSTitle_main_entry = ADDRESS_OSTitle_main_entry_ptr;
SC_0x25_KernelCopyData((void*)OS_SPECIFICS, &osSpecificFunctions, sizeof(OsSpecifics));
//! at this point we dont need to check header and stuff as it is sure to be OK
Elf32_Ehdr *ehdr = (Elf32_Ehdr *) private_data->data_elf;
unsigned int mainEntryPoint = ehdr->e_entry;
//! Install our entry point hook
unsigned int repl_addr = ADDRESS_main_entry_hook;
unsigned int jump_addr = mainEntryPoint & 0x03fffffc;
bufferU32 = 0x48000003 | jump_addr;
SC_0x25_KernelCopyData((void*)(LIB_CODE_RW_BASE_OFFSET + repl_addr), &bufferU32, sizeof(bufferU32));
// flush caches and invalidate instruction cache
private_data->ICInvalidateRange((void*)(repl_addr), 4);
}
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