| 1747,7 → 1747,12 |
|---|
| jnz .shift |
| |
| ; if given memory address belongs to kernel then error |
| stdcall is_region_userspace, ebx, 128 |
| push ebx |
| mov eax, ebx |
| mov ebx, 128 |
| call is_region_userspace |
| pop ebx |
| test eax, eax |
| jz .addr_error |
| |
| mov eax, keymap |
| 1760,7 → 1765,12 |
|---|
| dec ecx |
| jnz .alt |
| |
| stdcall is_region_userspace, ebx, 128 |
| push ebx |
| mov eax, ebx |
| mov ebx, 128 |
| call is_region_userspace |
| pop ebx |
| test eax, eax |
| jz .addr_error |
| |
| mov eax, keymap_shift |
| 1773,7 → 1783,12 |
|---|
| dec ecx |
| jne .country |
| |
| stdcall is_region_userspace, ebx, 128 |
| push ebx |
| mov eax, ebx |
| mov ebx, 128 |
| call is_region_userspace |
| pop ebx |
| test eax, eax |
| jz .addr_error |
| |
| mov eax, keymap_alt |
| 2453,7 → 2468,10 |
|---|
| ;------------------------------------------------------------------------------ |
| sysfn_getversion: ; 18.13 = get kernel ID and version |
| ; if given memory address belongs to kernel then error |
| stdcall is_region_userspace, ecx, version_end-version_inf |
| mov eax, ecx |
| mov ebx, version_end-version_inf |
| call is_region_userspace |
| test eax, eax |
| jz .addr_error |
| |
| mov edi, ecx |
| 3164,7 → 3182,12 |
|---|
| ; +30 dword PID , process idenfification number |
| ; |
| ; if given memory address belongs to kernel then error |
| stdcall is_region_userspace, ebx, 0x4C |
| push ebx |
| mov eax, ebx |
| mov ebx, 0x4C |
| call is_region_userspace |
| pop ebx |
| test eax, eax |
| jz .addr_error |
| |
| cmp ecx, -1 ; who am I ? |
| 5678,27 → 5701,18 |
|---|
| mov [esp + 32], dword -1 |
| ret |
| |
| align 4 |
| ; check if given memory region lays in lower 2gb (userspace memory) or not |
| align 4 |
| proc is_region_userspace stdcall, base:dword, len:dword |
| ; in: |
| ; base = base address of region |
| ; len = lenght of region |
| ; out: ZF = 1 if region in userspace memory |
| ; ZF = 0 otherwise |
| push eax ebx |
| mov eax, [base] |
| is_region_userspace: |
| ; in: eax = base |
| ; ebx = len |
| ; out: eax = 1 if region in userspace memory, 0 if not |
| push esi edi ecx |
| |
| cmp eax, OS_BASE |
| ja @f |
| |
| mov ebx, 0xFFFFFFFF |
| sub ebx, [base] |
| inc ebx |
| cmp [len], ebx |
| ja @f |
| |
| add eax, [len] |
| add eax, ebx |
| cmp eax, OS_BASE |
| ja @f |
| |
| 5707,10 → 5721,8 |
|---|
| @@: |
| xor eax, eax |
| .ret: |
| test eax, eax |
| pop ebx eax |
| pop ecx edi esi |
| ret |
| endp |
| |
| if ~ lang eq sp |
| diff16 "end of .text segment",0,$ |