| 186 | } |
| 187 | |
| 188 | bool CheckKernelPointer(uintptr_t addr, uint64_t len){ |
| 189 | if(PML4_GET_INDEX(addr) != PML4_GET_INDEX(KERNEL_VIRTUAL_BASE)){ |
| 190 | return 0; |
| 191 | } |
| 192 | |
| 193 | if(!(kernelPDPT[PDPT_GET_INDEX(addr)] & 0x1)){ |
| 194 | return 0; |
| 195 | } |
| 196 | |
| 197 | if(PDPT_GET_INDEX(addr) == KERNEL_HEAP_PDPT_INDEX){ |
| 198 | if(!(kernelHeapDir[PAGE_DIR_GET_INDEX(addr)] & 0x1)){ |
| 199 | return 0; |
| 200 | } |
| 201 | |
| 202 | if(!(kernelHeapDir[PAGE_DIR_GET_INDEX(addr)] & PDE_2M)){ |
| 203 | if(!(kernelHeapDirTables[PAGE_DIR_GET_INDEX(addr)][PAGE_TABLE_GET_INDEX(addr)] & 0x1)){ |
| 204 | return 0; |
| 205 | } |
| 206 | } |
| 207 | } else if(PDPT_GET_INDEX(addr) == PDPT_GET_INDEX(KERNEL_VIRTUAL_BASE)){ |
| 208 | if(!(kernelDir[PAGE_DIR_GET_INDEX(addr)] & 0x1)){ |
| 209 | return 0; |
| 210 | } |
| 211 | } else { |
| 212 | return 0; |
| 213 | } |
| 214 | |
| 215 | return 1; |
| 216 | } |
| 217 | |
| 218 | bool CheckUsermodePointer(uintptr_t addr, uint64_t len, address_space_t* addressSpace){ |
| 219 | if(addr >> 48) return 0; // Non-canonical or higher-half address |