295 lines
7.8 KiB
PHP
295 lines
7.8 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2004-2015. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision$
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include 'export.inc'
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align 4
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proc load_PE stdcall, file_name:dword
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locals
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image dd ?
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entry dd ?
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base dd ?
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endl
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stdcall load_file, [file_name]
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test eax, eax
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jz .fail
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mov [image], eax
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mov edx, [eax+STRIPPED_PE_HEADER.SizeOfImage]
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; mov cl, [eax+STRIPPED_PE_HEADER.Subsystem]
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cmp word [eax], STRIPPED_PE_SIGNATURE
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jz @f
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mov edx, [eax+60]
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; mov cl, [eax+5Ch+edx]
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mov edx, [eax+80+edx]
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@@:
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mov [entry], 0
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; cmp cl, 1
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; jnz .cleanup
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stdcall kernel_alloc, edx
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test eax, eax
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jz .cleanup
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mov [base], eax
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push ebx ebp
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mov ebx, [image]
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mov ebp, eax
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call map_PE
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pop ebp ebx
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mov [entry], eax
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test eax, eax
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jnz .cleanup
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stdcall kernel_free, [base]
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.cleanup:
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stdcall kernel_free, [image]
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mov eax, [entry]
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ret
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.fail:
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xor eax, eax
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ret
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endp
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map_PE: ;ebp=base:dword, ebx=image:dword
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push edi
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push esi
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sub esp, .locals_size
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virtual at esp
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.numsections dd ?
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.import_names dd ?
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.import_targets dd ?
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.peheader dd ?
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.bad_import dd ?
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.import_idx dd ?
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.import_descr dd ?
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.relocs_rva dd ?
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.relocs_size dd ?
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.section_header_size dd ?
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.AddressOfEntryPoint dd ?
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.ImageBase dd ?
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.locals_size = $ - esp
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end virtual
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cmp word [ebx], STRIPPED_PE_SIGNATURE
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jz .stripped
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mov edx, ebx
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add edx, [ebx+60]
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movzx eax, word [edx+6]
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mov [.numsections], eax
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mov eax, [edx+40]
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mov [.AddressOfEntryPoint], eax
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mov eax, [edx+52]
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mov [.ImageBase], eax
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mov ecx, [edx+84]
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mov [.section_header_size], 40
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mov eax, [edx+128]
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mov [.import_descr], eax
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mov eax, [edx+160]
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mov [.relocs_rva], eax
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mov eax, [edx+164]
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mov [.relocs_size], eax
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add edx, 256
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jmp .common
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.stripped:
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mov eax, [ebx+STRIPPED_PE_HEADER.AddressOfEntryPoint]
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mov [.AddressOfEntryPoint], eax
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mov eax, [ebx+STRIPPED_PE_HEADER.ImageBase]
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mov [.ImageBase], eax
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movzx eax, [ebx+STRIPPED_PE_HEADER.NumberOfSections]
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mov [.numsections], eax
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movzx ecx, [ebx+STRIPPED_PE_HEADER.NumberOfRvaAndSizes]
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xor eax, eax
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mov [.relocs_rva], eax
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mov [.relocs_size], eax
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test ecx, ecx
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jz @f
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mov eax, [ebx+sizeof.STRIPPED_PE_HEADER+SPE_DIRECTORY_IMPORT*8]
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@@:
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mov [.import_descr], eax
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cmp ecx, SPE_DIRECTORY_BASERELOC
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jbe @f
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mov eax, [ebx+sizeof.STRIPPED_PE_HEADER+SPE_DIRECTORY_BASERELOC*8]
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mov [.relocs_rva], eax
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mov eax, [ebx+sizeof.STRIPPED_PE_HEADER+SPE_DIRECTORY_BASERELOC*8+4]
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mov [.relocs_size], eax
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@@:
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mov [.section_header_size], 28
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lea edx, [ebx+ecx*8+sizeof.STRIPPED_PE_HEADER+8]
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mov ecx, [ebx+STRIPPED_PE_HEADER.SizeOfHeaders]
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.common:
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mov esi, ebx
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mov edi, ebp
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shr ecx, 2
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rep movsd
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cmp [.numsections], 0
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jz .nosections
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.copy_sections:
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mov eax, [edx+8]
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test eax, eax
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je .no_section_data
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mov esi, ebx
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mov edi, ebp
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add esi, [edx+12]
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mov ecx, eax
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add edi, [edx+4]
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add ecx, 3
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shr ecx, 2
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rep movsd
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.no_section_data:
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mov ecx, [edx]
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cmp ecx, eax
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jbe .no_section_fill
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sub ecx, eax
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add eax, [edx+4]
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lea edi, [eax+ebp]
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xor eax, eax
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rep stosb
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.no_section_fill:
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add edx, [.section_header_size]
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dec [.numsections]
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jnz .copy_sections
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.nosections:
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cmp [.relocs_size], 0
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je .no_relocations
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mov esi, ebp
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mov ecx, ebp
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sub esi, [.ImageBase]
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add ecx, [.relocs_rva]
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.relocs_block:
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mov edi, [ecx]
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add edi, ebp
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mov ebx, [ecx+4]
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add ecx, 8
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sub [.relocs_size], ebx
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sub ebx, 8
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shr ebx, 1
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jz .relocs_next_block
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.one_reloc:
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movzx eax, word [ecx]
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add ecx, 2
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mov edx, eax
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shr eax, 12
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and edx, 4095
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cmp eax, 3
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jne @f
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add [edx+edi], esi
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@@:
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dec ebx
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jnz .one_reloc
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.relocs_next_block:
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cmp [.relocs_size], 0
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jg .relocs_block
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.no_relocations:
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cmp [.import_descr], 0
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je .no_imports
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add [.import_descr], ebp
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mov [.bad_import], 0
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.import_block:
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mov ecx, [.import_descr]
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cmp dword [ecx+4], 0
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jne @f
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cmp dword [ecx+12], 0
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je .done_imports
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@@:
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mov edx, dword [ecx]
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mov ecx, dword [ecx+16]
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test edx, edx
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jnz @f
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mov edx, ecx
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@@:
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mov [.import_idx], 0
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add ecx, ebp
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add edx, ebp
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mov [.import_names], edx
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mov [.import_targets], ecx
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.import_func:
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mov esi, [.import_idx]
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mov edi, [.import_names]
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mov eax, [edi+esi*4]
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test eax, eax
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je .next_import_block
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js .next_import_block
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lea edi, [ebp+eax]
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mov eax, [.import_targets]
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mov dword [eax+esi*4], 0
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lea esi, [edi+2]
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movzx ebx, word [edi]
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push 32
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mov ecx, [__exports+32]
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mov eax, [ecx+OS_BASE+ebx*4]
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add eax, OS_BASE
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push eax
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push esi
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call strncmp
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test eax, eax
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jz .import_func_found
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xor ebx, ebx
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.import_func_candidate:
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push 32
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mov ecx, [__exports+32]
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mov eax, [ecx+OS_BASE+ebx*4]
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add eax, OS_BASE
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push eax
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push esi
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call strncmp
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test eax, eax
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je .import_func_found
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inc ebx
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cmp ebx, [__exports+24]
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jb .import_func_candidate
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mov esi, msg_unresolved
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call sys_msg_board_str
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lea esi, [edi+2]
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call sys_msg_board_str
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mov esi, msg_CR
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call sys_msg_board_str
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mov [.bad_import], 1
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jmp .next_import_func
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.import_func_found:
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mov esi, [__exports+28]
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mov edx, [.import_idx]
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mov ecx, [.import_targets]
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mov eax, [esi+OS_BASE+ebx*4]
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add eax, OS_BASE
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mov [ecx+edx*4], eax
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.next_import_func:
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inc [.import_idx]
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jmp .import_func
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.next_import_block:
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add [.import_descr], 20
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jmp .import_block
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.done_imports:
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xor eax, eax
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cmp [.bad_import], 0
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jne @f
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.no_imports:
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mov eax, ebp
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add eax, [.AddressOfEntryPoint]
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@@:
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add esp, .locals_size
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pop esi
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pop edi
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ret
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