| 0,0 → 1,133 |
|---|
| |
| use32 |
| |
| LIBC_VERSION = 1 |
| DLL_ENTRY = 1 |
| |
| db 'MENUET02' |
| dd 1 |
| dd start |
| dd i_end |
| dd mem |
| dd mem |
| dd cmdline |
| dd path |
| dd 0 |
| |
| align 4 |
| start: |
| mov eax, LIBC_VERSION |
| mov ecx, sz_libc |
| mov edx, libc |
| call load_library |
| test eax, eax |
| jz .fail |
| |
| push dword 0 ; no environment |
| push cmdline |
| push path |
| push (my_app_end - my_app) |
| push my_app |
| call [libc.imp_exec] |
| |
| ret |
| .fail: |
| or eax, -1 |
| int 0x40 |
| |
| align 4 |
| load_library: ;eax=VERSION ecx=library path edx=import section |
| |
| sub esp, 16 |
| mov [esp+8], edx |
| mov [esp+12], eax |
| |
| mov eax, 68 |
| mov ebx, 19 |
| int 0x40 |
| test eax, eax |
| jz .fail |
| |
| mov [esp+4], eax |
| mov esi, edx ;import section |
| mov edx, eax ;export section |
| .import_loop: |
| lodsd |
| test eax, eax |
| jz .import_done |
| .import_find: |
| mov ebx, [edx] |
| test ebx, ebx |
| jz .fail ;import_not_found |
| |
| mov [esp], eax ;import name |
| @@: |
| mov cl, [eax] |
| cmp cl, [ebx] |
| jnz .import_find_next |
| |
| test cl, cl |
| jz .import_found |
| |
| inc eax |
| inc ebx |
| jmp @b |
| |
| .import_find_next: |
| mov eax, [esp] |
| add edx, 8 |
| jmp .import_find |
| |
| .import_found: |
| mov eax, [edx+4] |
| mov [esi-4], eax |
| mov edx, [esp+4] |
| jmp .import_loop |
| .import_done: |
| |
| mov edx, [esp+8] |
| mov eax, [esp+12] |
| |
| cmp word [edx+4], ax |
| jb .fail |
| cmp word [edx+6], ax |
| ja .fail |
| |
| push DLL_ENTRY |
| call dword [edx] |
| .fail: |
| add esp, 16 |
| ret |
| |
| |
| sz_libc db '/sys/lib/libc.obj',0 |
| |
| szStart db 'START',0 |
| szVersion db 'version',0 |
| szExec db 'exec',0 |
| |
| libc: |
| |
| .imp_start dd szStart |
| .imp_ver dd szVersion |
| .imp_exec dd szExec |
| dd 0 |
| |
| ; keep this aligned |
| align 16 |
| my_app: |
| file 'myapp.exe' |
| my_app_end: |
| |
| |
| ; keep this aligned |
| align 4 |
| i_end: |
| |
| path rb 1024 |
| cmdline rb 256 |
| rb 128 ;required stack |
| ; keep this aligned |
| align 4096 |
| mem: |
| |