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Add support for USB Serial logging, add custom IPC to start logging.

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This commit is contained in:
Maschell 2021-10-31 16:20:42 +01:00
parent 7388fa001f
commit 89792403d4
6 changed files with 63 additions and 0 deletions
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1
source/common/ipc_defs.h
View File

@ -226,5 +226,6 @@ typedef struct {
#define IPC_CUSTOM_MEN_RPX_HOOK_COMPLETED 0xFD
#define IPC_CUSTOM_LOAD_CUSTOM_RPX 0xFC
#define IPC_CUSTOM_META_XML_READ 0xFB
#define IPC_CUSTOM_START_USB_LOGGING 0xFA
#define LOAD_FILE_TARGET_SD_CARD 0

5
source/ios_kernel/source/instant_patches.c
View File

@ -84,6 +84,11 @@ void instant_patches_setup(void) {
*(volatile u32 *) (0x0501dd78 - 0x05000000 + 0x081C0000) = THUMB_BL(0x0501dd78, MCP_ReadCOSXml_patch);
*(volatile u32 *) (0x051105ce - 0x05000000 + 0x081C0000) = THUMB_BL(0x051105ce, MCP_ReadCOSXml_patch);
// Patch MCP debugmode check for syslog
*(volatile u32 *) (0x050290d8 - 0x05000000 + 0x081C0000) = 0x20004770;
// Patch TEST to allow syslog
*(volatile u32 *) (0xe4007828 - 0xe4000000 + 0x13A40000) = 0xe3a00000;
// patch default title id to system menu
*(volatile u32 *) mcp_data_phys(0x050B817C) = *(volatile u32 *) 0x0017FFF0;
*(volatile u32 *) mcp_data_phys(0x050B8180) = *(volatile u32 *) 0x0017FFF4;

16
source/ios_kernel/source/kernel_patches.c
View File

@ -121,6 +121,22 @@ void kernel_run_patches(u32 ios_elf_start) {
section_write_word(ios_elf_start, 0xe22830e0, 0x00000000);
section_write_word(ios_elf_start, 0xe22b2a78, 0x00000000);
section_write_word(ios_elf_start, 0xe204fb68, 0xe3a00000);
// patch MCP syslog debug mode check
section_write_word(ios_elf_start, 0x050290d8, 0x20004770);
// Write magic word to disable custom IPC
section_write_word(ios_elf_start, 0x050290dc, 0x42424242);
// patch TEST debug mode check
//section_write_word(ios_elf_start, 0xe4016a78, 0xe3a00000);
section_write_word(ios_elf_start, 0xe4007828, 0xe3a00000);
// Patch FS to syslog everything
section_write_word(ios_elf_start, 0x107F5720, ARM_B(0x107F5720, 0x107F0C84));
// Patch MCP to syslog everything
section_write_word(ios_elf_start, 0x05055438, ARM_B(0x05055438, 0x0503dcf8));
section_write_word(ios_elf_start, 0x0812CD2C, ARM_B(0x0812CD2C, kernel_syscall_0x81));

25
source/ios_mcp/source/mcp_loadfile.c
View File

@ -274,6 +274,31 @@ int _MCP_ioctl100_patch(ipcmessage *msg) {
_startMainThread();
break;
}
case IPC_CUSTOM_START_USB_LOGGING: {
if(*((uint32_t*)0x050290dc) == 0x42424242){
// Skip syslog after a reload
break;
}
int handle = svcOpen("/dev/testproc1", 0);
if(handle > 0){
svcResume(handle);
svcClose(handle);
}
handle = svcOpen("/dev/usb_syslog", 0);
if(handle > 0){
svcResume(handle);
svcClose(handle);
}
// Kill existing syslogs to avoid long catch up
uint32_t * bufferPtr = (uint32_t*)(*(uint32_t*)0x05095ecc);
bufferPtr[0] = 0;
bufferPtr[1] = 0;
break;
}
default: {
}
}

4
source/ios_mcp/source/svc.h
View File

@ -17,6 +17,10 @@ void svcFree(u32 heapid, void *ptr);
int svcOpen(char *name, int mode);
int svcSuspend(int fd);
int svcResume(int fd);
int svcClose(int fd);
int svcIoctl(int fd, u32 request, void *input_buffer, u32 input_buffer_len, void *output_buffer, u32 output_buffer_len);

12
source/ios_mcp/source/svc.s
View File

@ -62,6 +62,18 @@ svcOpen:
.word 0xE7F033F0
bx lr
.global svcResume
.type svcResume, %function
svcResume:
.word 0xe7f043f0
bx lr
.global svcSuspend
.type svcSuspend, %function
svcSuspend:
.word 0xe7f044f0
bx lr
.global svcClose
.type svcClose, %function
svcClose: