forked from KolibriOS/kolibrios
512 lines
12 KiB
PHP
512 lines
12 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2004-2007. 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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MEM_LIST_OFFSET equ 8
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FREE_BLOCK equ 4
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USED_BLOCK equ 8
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DONT_FREE_BLOCK equ 10h
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align 4
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proc free_kernel_space stdcall uses ebx ecx edx esi edi, base:dword
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ret
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endp
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;;;;;;;;;;;;;; USER ;;;;;;;;;;;;;;;;;
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HEAP_TOP equ 0x5FC00000
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align 4
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proc init_heap
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mov ebx,[current_slot]
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mov eax, [ebx+APPDATA.heap_top]
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test eax, eax
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jz @F
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sub eax,[ebx+APPDATA.heap_base]
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sub eax, 4096
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ret
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@@:
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mov esi, [ebx+APPDATA.mem_size]
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add esi, 4095
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and esi, not 4095
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mov [ebx+APPDATA.mem_size], esi
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mov eax, HEAP_TOP
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mov [ebx+APPDATA.heap_base], esi
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mov [ebx+APPDATA.heap_top], eax
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sub eax, esi
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shr esi, 10
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mov ecx, eax
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sub eax, 4096
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or ecx, FREE_BLOCK
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mov [page_tabs+esi], ecx
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ret
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endp
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align 4
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proc user_alloc stdcall, alloc_size:dword
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push ebx
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push esi
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push edi
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mov ecx, [alloc_size]
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add ecx, (4095+4096)
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and ecx, not 4095
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mov ebx, [current_slot]
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mov esi, dword [ebx+APPDATA.heap_base] ; heap_base
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mov edi, dword [ebx+APPDATA.heap_top] ; heap_top
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l_0:
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cmp esi, edi
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jae m_exit
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mov ebx, esi
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shr ebx, 12
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mov eax, [page_tabs+ebx*4]
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test al, FREE_BLOCK
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jz test_used
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and eax, 0xFFFFF000
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cmp eax, ecx ;alloc_size
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jb m_next
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jz @f
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lea edx, [esi+ecx]
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sub eax, ecx
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or al, FREE_BLOCK
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shr edx, 12
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mov [page_tabs+edx*4], eax
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@@:
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or ecx, USED_BLOCK
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mov [page_tabs+ebx*4], ecx
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shr ecx, 12
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inc ebx
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dec ecx
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jz .no
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@@:
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mov dword [page_tabs+ebx*4], 2
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inc ebx
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dec ecx
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jnz @B
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.no:
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mov edx, [current_slot]
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mov ebx, [alloc_size]
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add ebx, 0xFFF
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and ebx, not 0xFFF
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add ebx, [edx+APPDATA.mem_size]
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call update_mem_size
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lea eax, [esi+4096]
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pop edi
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pop esi
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pop ebx
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ret
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test_used:
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test al, USED_BLOCK
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jz m_exit
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and eax, 0xFFFFF000
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m_next:
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add esi, eax
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jmp l_0
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m_exit:
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xor eax, eax
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pop edi
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pop esi
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pop ebx
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ret
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endp
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align 4
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proc user_free stdcall, base:dword
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push esi
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mov esi, [base]
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test esi, esi
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jz .exit
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push ebx
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xor ebx, ebx
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shr esi, 12
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mov eax, [page_tabs+(esi-1)*4]
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test al, USED_BLOCK
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jz .cantfree
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test al, DONT_FREE_BLOCK
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jnz .cantfree
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and eax, not 4095
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mov ecx, eax
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or al, FREE_BLOCK
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mov [page_tabs+(esi-1)*4], eax
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sub ecx, 4096
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mov ebx, ecx
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shr ecx, 12
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jz .released
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.release:
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xor eax, eax
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xchg eax, [page_tabs+esi*4]
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test al, 1
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jz @F
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call free_page
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mov eax, esi
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shl eax, 12
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invlpg [eax]
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@@:
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inc esi
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dec ecx
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jnz .release
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.released:
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push edi
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mov edx, [current_slot]
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mov esi, dword [edx+APPDATA.heap_base]
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mov edi, dword [edx+APPDATA.heap_top]
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sub ebx, [edx+APPDATA.mem_size]
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neg ebx
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call update_mem_size
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call user_normalize
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pop edi
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pop ebx
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pop esi
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ret
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.exit:
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xor eax, eax
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inc eax
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pop esi
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ret
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.cantfree:
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xor eax, eax
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pop ebx
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pop esi
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ret
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endp
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user_normalize:
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; in: esi=heap_base, edi=heap_top
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; out: eax=0 <=> OK
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; destroys: ebx,edx,esi,edi
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shr esi, 12
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shr edi, 12
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@@:
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mov eax, [page_tabs+esi*4]
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test al, USED_BLOCK
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jz .test_free
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shr eax, 12
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add esi, eax
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jmp @B
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.test_free:
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test al, FREE_BLOCK
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jz .err
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mov edx, eax
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shr edx, 12
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add edx, esi
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cmp edx, edi
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jae .exit
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mov ebx, [page_tabs+edx*4]
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test bl, USED_BLOCK
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jz .next_free
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shr ebx, 12
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add edx, ebx
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mov esi, edx
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jmp @B
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.next_free:
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test bl, FREE_BLOCK
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jz .err
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and dword [page_tabs+edx*4], 0
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add eax, ebx
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and eax, not 4095
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or eax, FREE_BLOCK
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mov [page_tabs+esi*4], eax
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jmp @B
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.exit:
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xor eax, eax
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inc eax
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ret
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.err:
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xor eax, eax
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ret
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user_realloc:
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; in: eax = pointer, ebx = new size
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; out: eax = new pointer or NULL
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test eax, eax
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jnz @f
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; realloc(NULL,sz) - same as malloc(sz)
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push ebx
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call user_alloc
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ret
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@@:
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push ecx edx
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lea ecx, [eax - 0x1000]
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shr ecx, 12
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mov edx, [page_tabs+ecx*4]
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test dl, USED_BLOCK
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jnz @f
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; attempt to realloc invalid pointer
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.ret0:
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pop edx ecx
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xor eax, eax
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ret
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@@:
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test dl, DONT_FREE_BLOCK
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jnz .ret0
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add ebx, 0x1FFF
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shr edx, 12
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shr ebx, 12
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; edx = allocated size, ebx = new size
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add edx, ecx
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add ebx, ecx
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cmp edx, ebx
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jb .realloc_add
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; release part of allocated memory
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.loop:
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cmp edx, ebx
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jz .release_done
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dec edx
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xor eax, eax
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xchg eax, [page_tabs+edx*4]
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test al, 1
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jz .loop
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call free_page
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mov eax, edx
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shl eax, 12
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invlpg [eax]
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jmp .loop
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.release_done:
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sub ebx, ecx
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cmp ebx, 1
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jnz .nofreeall
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mov eax, [page_tabs+ecx*4]
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and eax, not 0xFFF
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mov edx, [current_slot]
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mov ebx, [APPDATA.mem_size+edx]
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sub ebx, eax
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add ebx, 0x1000
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or al, FREE_BLOCK
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mov [page_tabs+ecx*4], eax
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push esi edi
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mov esi, [APPDATA.heap_base+edx]
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mov edi, [APPDATA.heap_top+edx]
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call update_mem_size
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call user_normalize
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pop edi esi
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jmp .ret0 ; all freed
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.nofreeall:
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sub edx, ecx
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shl ebx, 12
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or ebx, USED_BLOCK
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xchg [page_tabs+ecx*4], ebx
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shr ebx, 12
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sub ebx, edx
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push ebx ecx edx
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mov edx, [current_slot]
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shl ebx, 12
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sub ebx, [APPDATA.mem_size+edx]
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neg ebx
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call update_mem_size
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pop edx ecx ebx
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lea eax, [ecx+1]
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shl eax, 12
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push eax
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add ecx, edx
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lea edx, [ecx+ebx]
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shl ebx, 12
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jz .ret
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push esi
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mov esi, [current_slot]
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mov esi, [APPDATA.heap_top+esi]
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shr esi, 12
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@@:
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cmp edx, esi
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jae .merge_done
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mov eax, [page_tabs+edx*4]
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test al, USED_BLOCK
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jnz .merge_done
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and dword [page_tabs+edx*4], 0
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shr eax, 12
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add edx, eax
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shl eax, 12
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add ebx, eax
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jmp @b
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.merge_done:
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pop esi
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or ebx, FREE_BLOCK
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mov [page_tabs+ecx*4], ebx
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.ret:
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pop eax edx ecx
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ret
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.realloc_add:
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; get some additional memory
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mov eax, [current_slot]
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mov eax, [APPDATA.heap_top+eax]
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shr eax, 12
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cmp edx, eax
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jae .cant_inplace
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mov eax, [page_tabs+edx*4]
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test al, FREE_BLOCK
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jz .cant_inplace
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shr eax, 12
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add eax, edx
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sub eax, ebx
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jb .cant_inplace
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jz @f
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shl eax, 12
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or al, FREE_BLOCK
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mov [page_tabs+ebx*4], eax
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@@:
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mov eax, ebx
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sub eax, ecx
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shl eax, 12
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or al, USED_BLOCK
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mov [page_tabs+ecx*4], eax
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lea eax, [ecx+1]
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shl eax, 12
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push eax
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push edi
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lea edi, [page_tabs+edx*4]
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mov eax, 2
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sub ebx, edx
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mov ecx, ebx
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cld
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rep stosd
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pop edi
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mov edx, [current_slot]
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shl ebx, 12
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add ebx, [APPDATA.mem_size+edx]
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call update_mem_size
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pop eax edx ecx
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ret
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.cant_inplace:
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push esi edi
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mov eax, [current_slot]
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mov esi, [APPDATA.heap_base+eax]
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mov edi, [APPDATA.heap_top+eax]
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shr esi, 12
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shr edi, 12
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sub ebx, ecx
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.find_place:
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cmp esi, edi
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jae .place_not_found
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mov eax, [page_tabs+esi*4]
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test al, FREE_BLOCK
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jz .next_place
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shr eax, 12
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cmp eax, ebx
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jae .place_found
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add esi, eax
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jmp .find_place
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.next_place:
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shr eax, 12
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add esi, eax
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jmp .find_place
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.place_not_found:
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pop edi esi
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jmp .ret0
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.place_found:
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sub eax, ebx
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jz @f
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push esi
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add esi, ebx
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shl eax, 12
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or al, FREE_BLOCK
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mov [page_tabs+esi*4], eax
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pop esi
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@@:
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mov eax, ebx
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shl eax, 12
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or al, USED_BLOCK
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mov [page_tabs+esi*4], eax
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inc esi
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mov eax, esi
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shl eax, 12
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push eax
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mov eax, [page_tabs+ecx*4]
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and eax, not 0xFFF
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or al, FREE_BLOCK
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sub edx, ecx
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mov [page_tabs+ecx*4], eax
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inc ecx
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dec ebx
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dec edx
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jz .no
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@@:
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xor eax, eax
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xchg eax, [page_tabs+ecx*4]
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mov [page_tabs+esi*4], eax
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mov eax, ecx
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shl eax, 12
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invlpg [eax]
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inc esi
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inc ecx
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dec ebx
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dec edx
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jnz @b
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.no:
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push ebx
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mov edx, [current_slot]
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shl ebx, 12
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add ebx, [APPDATA.mem_size+edx]
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call update_mem_size
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pop ebx
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@@:
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mov dword [page_tabs+esi*4], 2
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inc esi
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dec ebx
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jnz @b
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pop eax edi esi edx ecx
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ret
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if 0
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align 4
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proc alloc_dll
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pushf
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cli
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bsf eax, [dll_map]
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jnz .find
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popf
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xor eax, eax
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ret
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.find:
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btr [dll_map], eax
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popf
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shl eax, 5
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add eax, dll_tab
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ret
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endp
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align 4
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proc alloc_service
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pushf
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cli
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bsf eax, [srv_map]
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jnz .find
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popf
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xor eax, eax
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ret
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.find:
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btr [srv_map], eax
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popf
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shl eax,0x02
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lea eax,[srv_tab+eax+eax*8] ;srv_tab+eax*36
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ret
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endp
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end if
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