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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,139 @@ | ||
| /* | ||
| * This file is part of PRO CFW. | ||
| * PRO CFW is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * PRO CFW is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with PRO CFW. If not, see <http://www.gnu.org/licenses/ . | ||
| */ | ||
|
|
||
| #include <pspsdk.h> | ||
| #include <psputilsforkernel.h> | ||
| #include <stdio.h> | ||
| #include <string.h> | ||
| #include <macros.h> | ||
| #include <ark.h> | ||
| #include <systemctrl.h> | ||
|
|
||
| // Find Import Library Pointer | ||
| SceLibraryStubTable * findImportLib(SceModule2 * pMod, char * library) | ||
| { | ||
| // Invalid Arguments | ||
| if(pMod == NULL || library == NULL) return NULL; | ||
|
|
||
| // Import Stub Table Start Address | ||
| void * stubTab = pMod->stub_top; | ||
|
|
||
| // Iterate Stubs | ||
| int i = 0; while(i < pMod->stub_size) | ||
| { | ||
| // Cast Import Table | ||
| SceLibraryStubTable * pImp = (SceLibraryStubTable *)(stubTab + i); | ||
|
|
||
| // Matching Library discovered | ||
| if(pImp->libname != NULL && strcmp(pImp->libname, library) == 0) | ||
| { | ||
| // Return Address | ||
| return pImp; | ||
| } | ||
|
|
||
| // Move Pointer | ||
| i += pImp->len * 4; | ||
| } | ||
|
|
||
| // Import Library not found | ||
| return NULL; | ||
| } | ||
|
|
||
| // Find Import Stub Address | ||
| unsigned int findImportByNID(SceModule2 * pMod, char * library, unsigned int nid) | ||
| { | ||
| // Find Import Library | ||
| SceLibraryStubTable * pImp = findImportLib(pMod, library); | ||
|
|
||
| // Found Import Library | ||
| if(pImp != NULL) | ||
| { | ||
| // Iterate Imports | ||
| int i = 0; for(; i < pImp->stubcount; i++) | ||
| { | ||
| // Matching Function NID | ||
| if(pImp->nidtable[i] == nid) | ||
| { | ||
| // Return Function Stub Address | ||
| return (unsigned int)(pImp->stubtable + 8 * i); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // Import Stub not found | ||
| return 0; | ||
| } | ||
|
|
||
| // Hook Function in Module Import Stubs | ||
| // This function autodetects whether Syscalls are used or not... | ||
| // Manual exporting in exports.exp is still required however for Syscalls to work. | ||
| int hookImportByNID(SceModule2 * pMod, char * library, unsigned int nid, void * func) | ||
| { | ||
| // Invalid Arguments | ||
| if(pMod == NULL || library == NULL) return -1; | ||
|
|
||
| // Find Module Import Stub | ||
| unsigned int stub = findImportByNID(pMod, library, nid); | ||
|
|
||
| // Import Stub not found | ||
| if(stub == 0) return -3; | ||
|
|
||
| // Function as 16-Bit Unsigned Integer | ||
| unsigned int func_int = (unsigned int)func; | ||
|
|
||
| // Dummy Return | ||
| if(func_int <= 0xFFFF) | ||
| { | ||
| // Create Dummy Return | ||
| _sw(JR_RA, stub); | ||
| _sw(LI_V0(func_int), stub + 4); | ||
| } | ||
|
|
||
| // Normal Hook | ||
| else | ||
| { | ||
| // Syscall Hook | ||
| if ((stub & 0x80000000) == 0 && (func_int & 0x80000000) != 0) | ||
| { | ||
| // Query Syscall Number | ||
| int syscall = sceKernelQuerySystemCall(func); | ||
|
|
||
| // Not properly exported in exports.exp | ||
| if(syscall < 0) return -3; | ||
|
|
||
| // Create Syscall Hook | ||
| _sw(JR_RA, stub); | ||
| _sw(SYSCALL(syscall), stub + 4); | ||
| } | ||
|
|
||
| // Direct Jump Hook | ||
| else | ||
| { | ||
| // Create Direct Jump Hook | ||
| _sw(JUMP(func), stub); | ||
| _sw(NOP, stub + 4); | ||
| } | ||
| } | ||
|
|
||
| // Invalidate Cache | ||
| sceKernelDcacheWritebackInvalidateRange((void *)stub, 8); | ||
| sceKernelIcacheInvalidateRange((void *)stub, 8); | ||
|
|
||
| // Return Success | ||
| return 0; | ||
| } | ||
|
|
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