forked from KolibriOS/kolibrios
308 lines
6.3 KiB
PHP
308 lines
6.3 KiB
PHP
$Revision$
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;============================================================================
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;
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; External kernel dependencies (libraries) loading
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;
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;============================================================================
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macro library [name,fname]
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{
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forward
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dd __#name#_library_table__,__#name#_library_name__
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common
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dd 0
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forward
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__#name#_library_name__ db fname,0
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}
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macro import lname,[name,sname]
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{
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common
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align 4
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__#lname#_library_table__:
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forward
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name dd __#name#_import_name__
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common
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dd 0
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forward
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__#name#_import_name__ db sname,0
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}
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macro export [name,sname]
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{
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align 4
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forward
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dd __#name#_export_name__,name
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common
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dd 0
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forward
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__#name#_export_name__ db sname,0
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}
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align 4 ; loading library (use kernel functions)
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proc load_k_library stdcall, file_name:dword
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locals
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coff dd ?
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sym dd ?
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strings dd ?
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img_size dd ?
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img_base dd ?
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exports dd ?
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endl
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cli
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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 [coff], eax
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movzx ecx, [eax+CFH.nSections]
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xor ebx, ebx
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lea edx, [eax+20]
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@@:
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add ebx, [edx+CFS.SizeOfRawData]
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add ebx, 15
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and ebx, not 15
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add edx, COFF_SECTION_SIZE
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dec ecx
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jnz @B
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mov [img_size], ebx
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stdcall kernel_alloc, [img_size]
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test eax, eax
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jz .fail
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mov [img_base], eax
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mov edx, [coff]
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movzx ebx, [edx+CFH.nSections]
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mov edi, [img_base]
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lea eax, [edx+20]
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@@:
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mov [eax+CFS.VirtualAddress], edi
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mov esi, [eax+CFS.PtrRawData]
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test esi, esi
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jnz .copy
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add edi, [eax+CFS.SizeOfRawData]
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jmp .next
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.copy:
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add esi, edx
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mov ecx, [eax+CFS.SizeOfRawData]
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cld
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rep movsb
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.next:
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add edi, 15
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and edi, not 15
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add eax, COFF_SECTION_SIZE
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dec ebx
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jnz @B
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mov ebx, [edx+CFH.pSymTable]
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add ebx, edx
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mov [sym], ebx
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mov ecx, [edx+CFH.nSymbols]
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add ecx,ecx
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lea ecx,[ecx+ecx*8] ;ecx*=18 = nSymbols*CSYM_SIZE
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add ecx, [sym]
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mov [strings], ecx
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lea eax, [edx+20]
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stdcall fix_coff_symbols, eax, [sym], [edx+CFH.nSymbols],\
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[strings], dword 0
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test eax, eax
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jnz @F
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@@:
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mov edx, [coff]
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movzx ebx, [edx+CFH.nSections]
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mov edi, 0
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lea eax, [edx+20]
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@@:
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add [eax+CFS.VirtualAddress], edi ;patch user space offset
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add eax, COFF_SECTION_SIZE
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dec ebx
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jnz @B
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add edx, 20
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stdcall fix_coff_relocs, [coff], edx, [sym]
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mov ebx, [coff]
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stdcall get_coff_sym,[sym],[ebx+CFH.nSymbols],szEXPORTS
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mov [exports], eax
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stdcall kernel_free, [coff]
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mov eax, [exports]
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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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proc dll.Load, import_table:dword
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mov esi,[import_table]
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.next_lib: mov edx,[esi]
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or edx,edx
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jz .exit
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push esi
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mov edi,s_libname
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mov al, '/'
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stosb
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mov esi,sysdir_path
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@@: lodsb
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stosb
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or al,al
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jnz @b
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dec edi
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mov [edi], dword '/lib'
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mov [edi+4],byte '/'
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add edi,5
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pop esi
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push esi
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mov esi,[esi+4]
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@@: lodsb
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stosb
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or al,al
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jnz @b
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pushad
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stdcall load_k_library,s_libname
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mov [esp+28],eax
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popad
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or eax,eax
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jz .fail
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stdcall dll.Link,eax,edx
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stdcall dll.Init,[eax+4]
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pop esi
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add esi,8
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jmp .next_lib
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.exit: xor eax,eax
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ret
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.fail: add esp,4
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xor eax,eax
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inc eax
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ret
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endp
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proc dll.Link, exp:dword,imp:dword
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push eax
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mov esi,[imp]
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test esi,esi
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jz .done
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.next: lodsd
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test eax,eax
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jz .done
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stdcall dll.GetProcAddress,[exp],eax
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or eax,eax
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jz @f
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mov [esi-4],eax
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jmp .next
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@@: mov dword[esp],0
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.done: pop eax
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ret
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endp
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proc dll.Init, dllentry:dword
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pushad
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mov eax,mem.Alloc
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mov ebx,mem.Free
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mov ecx,mem.ReAlloc
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mov edx,dll.Load
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stdcall [dllentry]
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popad
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ret
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endp
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proc dll.GetProcAddress, exp:dword,sz_name:dword
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mov edx,[exp]
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.next: test edx,edx
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jz .end
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stdcall strncmp,[edx],[sz_name], dword -1
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test eax,eax
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jz .ok
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add edx,8
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jmp .next
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.ok: mov eax,[edx+4]
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.end: ret
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endp
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;-----------------------------------------------------------------------------
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proc mem.Alloc size ;/////////////////////////////////////////////////////////
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;-----------------------------------------------------------------------------
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push ebx ecx
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; mov eax,[size]
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; lea ecx,[eax+4+4095]
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; and ecx,not 4095
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; stdcall kernel_alloc, ecx
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; add ecx,-4
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; mov [eax],ecx
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; add eax,4
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stdcall kernel_alloc, [size]
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pop ecx ebx
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ret
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endp
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;-----------------------------------------------------------------------------
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proc mem.ReAlloc mptr,size;///////////////////////////////////////////////////
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;-----------------------------------------------------------------------------
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push ebx ecx esi edi eax
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mov eax,[mptr]
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mov ebx,[size]
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or eax,eax
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jz @f
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lea ecx,[ebx+4+4095]
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and ecx,not 4095
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add ecx,-4
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cmp ecx,[eax-4]
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je .exit
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@@: mov eax,ebx
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call mem.Alloc
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xchg eax,[esp]
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or eax,eax
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jz .exit
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mov esi,eax
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xchg eax,[esp]
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mov edi,eax
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mov ecx,[esi-4]
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cmp ecx,[edi-4]
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jbe @f
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mov ecx,[edi-4]
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@@: add ecx,3
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shr ecx,2
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cld
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rep movsd
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xchg eax,[esp]
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call mem.Free
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.exit:
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pop eax edi esi ecx ebx
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ret
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endp
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;-----------------------------------------------------------------------------
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proc mem.Free mptr ;//////////////////////////////////////////////////////////
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;-----------------------------------------------------------------------------
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; mov eax,[mptr]
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; or eax,eax
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; jz @f
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; push ebx ecx
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; lea ecx,[eax-4]
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; stdcall kernel_free, ecx
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; pop ecx ebx
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; @@: ret
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stdcall kernel_free, [mptr]
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ret
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endp
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uglobal
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s_libname db 64 dup (0)
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endg
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