| 31 | } |
| 32 | |
| 33 | void writeJmp(void *func, void *replacement) |
| 34 | { |
| 35 | quint8 *cur = ( quint8 * )func; |
| 36 | quint8 *aligned = ( quint8 * )page_align(cur); |
| 37 | assert(mprotect(aligned, 0xFFFF, PROT_READ | PROT_WRITE | PROT_EXEC) == 0); |
| 38 | |
| 39 | *cur = 0xff; |
| 40 | *(++cur) = 0x25; |
| 41 | |
| 42 | *(( quint32 * )++cur) = 0; |
| 43 | cur += sizeof(quint32); |
| 44 | *(( quint64 * )cur) = ( quint64 )replacement; |
| 45 | |
| 46 | assert(mprotect(aligned, 0xFFFF, PROT_READ | PROT_EXEC) == 0); |
| 47 | } |
| 48 | |
| 49 | void test() |
| 50 | { |