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New sysfunction 68.20: reallocate memory block

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git-svn-id: svn://kolibrios.org@448 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Evgeny Grechnikov (Diamond) 2007-04-02 14:29:39 +00:00
parent 92829c00bb
commit 1408306a87
4 changed files with 314 additions and 16 deletions
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249
kernel/trunk/core/heap.inc
View File

@ -752,6 +752,9 @@ proc user_free stdcall, base:dword
test eax, 1
jz @F
call free_page
mov eax, esi
shl eax, 12
invlpg [eax]
@@:
inc esi
dec ecx
@ -764,6 +767,18 @@ proc user_free stdcall, base:dword
sub ebx, [edx+SLOT_BASE+APPDATA.mem_size]
neg ebx
call update_mem_size
call user_normalize
ret
.exit:
xor eax, eax
inc eax
ret
endp
user_normalize:
; in: esi=heap_base, edi=heap_top
; out: eax=0 <=> OK
; destroys: ebx,edx,esi,edi
add esi, new_app_base
add edi, new_app_base
shr esi, 12
@ -808,7 +823,239 @@ proc user_free stdcall, base:dword
.err:
xor eax, eax
ret
endp
user_realloc:
; in: eax = pointer, ebx = new size
; out: eax = new pointer or NULL
test eax, eax
jnz @f
; realloc(NULL,sz) - same as malloc(sz)
push ebx
call user_alloc
ret
@@:
push ecx edx
lea ecx, [eax + new_app_base - 0x1000]
shr ecx, 12
mov edx, [page_tabs+ecx*4]
test edx, USED_BLOCK
jnz @f
; attempt to realloc invalid pointer
.ret0:
pop edx ecx
xor eax, eax
ret
@@:
add ebx, 0x1FFF
shr edx, 12
shr ebx, 12
; edx = allocated size, ebx = new size
add edx, ecx
add ebx, ecx
cmp edx, ebx
jb .realloc_add
; release part of allocated memory
.loop:
cmp edx, ebx
jz .release_done
dec edx
xor eax, eax
xchg eax, [page_tabs+edx*4]
test al, 1
jz .loop
call free_page
mov eax, edx
shl eax, 12
invlpg [eax]
jmp .loop
.release_done:
sub ebx, ecx
cmp ebx, 1
jnz .nofreeall
mov eax, [page_tabs+ecx*4]
and eax, not 0xFFF
mov edx, [CURRENT_TASK]
shl edx, 8
mov ebx, [SLOT_BASE+APPDATA.mem_size+edx]
sub ebx, eax
add ebx, 0x1000
or al, FREE_BLOCK
mov [page_tabs+ecx*4], eax
push esi edi
mov esi, [SLOT_BASE+APPDATA.heap_base+edx]
mov edi, [SLOT_BASE+APPDATA.heap_top+edx]
call update_mem_size
call user_normalize
pop edi esi
jmp .ret0 ; all freed
.nofreeall:
sub edx, ecx
shl ebx, 12
or ebx, USED_BLOCK
xchg [page_tabs+ecx*4], ebx
shr ebx, 12
sub ebx, edx
push ebx ecx edx
mov edx, [CURRENT_TASK]
shl edx, 8
shl ebx, 12
sub ebx, [SLOT_BASE+APPDATA.mem_size+edx]
neg ebx
call update_mem_size
pop edx ecx ebx
lea eax, [ecx+1-(new_app_base shr 12)]
shl eax, 12
push eax
add ecx, ebx
add edx, ecx
shl ebx, 12
jz .ret
push esi
mov esi, [CURRENT_TASK]
shl esi, 8
mov esi, [SLOT_BASE+APPDATA.heap_top+esi]
shr esi, 12
@@:
cmp edx, esi
jae .merge_done
mov eax, [page_tabs+edx*4]
test al, USED_BLOCK
jz .merge_done
and dword [page_tabs+edx*4], 0
and eax, not 0xFFF
add ebx, eax
add edx, eax
jmp @b
.merge_done:
pop esi
or ebx, FREE_BLOCK
mov [page_tabs+ecx*4], ebx
.ret:
pop eax edx ecx
ret
.realloc_add:
; get some additional memory
mov eax, [CURRENT_TASK]
shl eax, 8
mov eax, [SLOT_BASE+APPDATA.heap_top+eax]
add eax, new_app_base
shr eax, 12
cmp edx, eax
jae .cant_inplace
mov eax, [page_tabs+edx*4]
shr eax, 12
add eax, edx
cmp eax, ebx
jb .cant_inplace
sub eax, ebx
jz @f
shl eax, 12
or al, FREE_BLOCK
mov [page_tabs+ebx*4], eax
@@:
mov eax, ebx
sub eax, ecx
shl eax, 12
or al, USED_BLOCK
mov [page_tabs+ecx*4], eax
lea eax, [ecx+1-(new_app_base shr 12)]
shl eax, 12
push eax
push edi
lea edi, [page_tabs+edx*4]
mov eax, 2
sub ebx, edx
mov ecx, ebx
cld
rep stosd
pop edi
mov edx, [CURRENT_TASK]
shl edx, 8
shl ebx, 12
add ebx, [SLOT_BASE+APPDATA.mem_size+edx]
call update_mem_size
pop eax edx ecx
ret
.cant_inplace:
push esi edi
mov eax, [CURRENT_TASK]
shl eax, 8
mov esi, [SLOT_BASE+APPDATA.heap_base+eax]
mov edi, [SLOT_BASE+APPDATA.heap_top+eax]
add esi, new_app_base
add edi, new_app_base
shr esi, 12
shr edi, 12
sub ebx, ecx
.find_place:
cmp esi, edi
jae .place_not_found
mov eax, [page_tabs+esi*4]
test al, FREE_BLOCK
jz .next_place
shr eax, 12
cmp eax, ebx
jae .place_found
add esi, eax
jmp .find_place
.next_place:
shr eax, 12
add esi, eax
jmp .find_place
.place_not_found:
pop edi esi
jmp .ret0
.place_found:
sub eax, ebx
jz @f
push esi
add esi, eax
shl eax, 12
or al, FREE_BLOCK
mov [page_tabs+esi*4], eax
pop esi
@@:
mov eax, ebx
shl eax, 12
or al, USED_BLOCK
mov [page_tabs+esi*4], eax
inc esi
mov eax, esi
shl eax, 12
sub eax, new_app_base
push eax
mov eax, [page_tabs+ecx*4]
and eax, not 0xFFF
or al, FREE_BLOCK
sub edx, ecx
mov [page_tabs+ecx*4], eax
inc ecx
@@:
xor eax, eax
xchg eax, [page_tabs+ecx*4]
mov [page_tabs+esi*4], eax
mov eax, ecx
shl eax, 12
invlpg [eax]
inc ecx
inc esi
dec ebx
dec edx
jnz @b
push ebx
mov edx, [CURRENT_TASK]
shl edx, 8
shl ebx, 12
add ebx, [SLOT_BASE+APPDATA.mem_size+edx]
call update_mem_size
pop ebx
@@:
mov dword [page_tabs+esi*4], 2
inc esi
dec ebx
jnz @b
pop eax edi esi edx ecx
ret
if 0
align 4

15
kernel/trunk/core/memory.inc
View File

@ -267,13 +267,12 @@ proc free_page
pushfd
cli
shr eax, 12 ;page index
mov ebx, sys_pgmap
bts [ebx], eax ;that's all!
bts dword [sys_pgmap], eax ;that's all!
cmc
adc [pg_data.pages_free], 0
shr eax, 3
and eax, not 3 ;dword offset from page_map
add eax, ebx
add eax, sys_pgmap
cmp [page_start], eax
ja @f
popfd
@ -1082,7 +1081,7 @@ new_services:
ret
@@:
cmp eax, 19
ja .fail
ja @f
add ebx, new_app_base
cmp ebx, new_app_base
jb .fail
@ -1090,6 +1089,14 @@ new_services:
mov [esp+36], eax
ret
@@:
cmp eax, 20
ja .fail
mov eax, ecx
call user_realloc
mov [esp+36], eax
ret
.fail:
xor eax, eax
mov [esp+36], eax

33
kernel/trunk/docs/sysfuncr.txt
View File

@ -3316,7 +3316,7 @@ IPC
======================================================================
================ ”γ­<CEB3>ζ¨ο 63 - ΰ ΅®β  α ¤®α<C2AE>®© ®β« ¤<C2A0>¨. ===============
======================================================================
„®áª  ®â« ¤ª¨ ¯à¥¤áâ ¢«ï¥â ᮡ®© á¨á⥬­ë© ¡ãä¥à (­  512 ¡ ©â),
„®áª  ®â« ¤ª¨ ¯à¥¤áâ ¢«ï¥â ᮡ®© á¨á⥬­ë© ¡ãä¥à (­  4096 ¡ ©â),
Ά <20>®β®ΰλ© «ξ΅ ο ―ணࠬ¬  ¬®¦¥β § ―¨α βμ (Ά®®΅ι¥ £®Ά®ΰο, ―ந§Ά®«μ­λ¥)
¤ ­­λ¥ ¨ ¨§ <20>®β®ΰ®£® ¤ΰγ£ ο ―ΰ®£ΰ ¬¬  ¬®¦¥β νβ¨ ¤ ­­λ¥ ―ΰ®η¨β βμ.
…αβμ ᮣ« θ¥­¨¥, Ά α®®βΆ¥βαβΆ¨¨ α <20>®β®ΰλ¬ § ―¨αλΆ ¥¬λ¥ ¤ ­­λ¥ -
@ -3644,7 +3644,8 @@ Architecture Software Developer's Manual, Volume 3, Appendix B);
* eax = 1 - γα―¥θ­®
* eax = 0 - ­¥γ¤ η 
‡ ¬¥η ­¨ο:
* <20>«®ª ¯ ¬ï⨠¤®«¦¥­ ¡ëâì à ­¥¥ ¢ë¤¥«¥­ ¯®¤ä㭪樥© 12.
* <20>«®ª ¯ ¬ï⨠¤®«¦¥­ ¡ëâì à ­¥¥ ¢ë¤¥«¥­ ¯®¤ä㭪樥© 12
¨«¨ ¯®¤ä㭪樥© 20.
======================================================================
===== ”γ­<CEB3>ζ¨ο 68, ―®¤δγ­<CEB3>ζ¨ο 14 - ®¦¨¤ βμ ¨§Ά¥ι¥­¨ο ®β ¤ΰ ©Ά¥ΰ . =====
@ -3736,6 +3737,30 @@ Architecture Software Developer's Manual, Volume 3, Appendix B);
§ <C2A7> ­η¨Ά ξ騩αο ­γ«ρ¬. <20>¥ΰΆλ© dword Ά αβΰγ<CEB0>βγΰ¥ οΆ«ο¥βαο
γ<> § β¥«¥¬ ­  ¨¬ο δγ­<CEB3>樨, Άβ®ΰ®© ᮤ¥ΰ¦¨β  ¤ΰ¥α δγ­<CEB3>樨.
======================================================================
====== ”ã­ªæ¨ï 68, ¯®¤äã­ªæ¨ï 20 - ¯¥à¥à á¯à¥¤¥«¨âì ¡«®ª ¯ ¬ïâ¨. =====
======================================================================
<EFBFBD> à ¬¥âàë:
* eax = 68 - ­®¬¥à ä㭪樨
* ebx = 20 - ­®¬¥à ¯®¤ä㭪樨
* ecx = ­®¢ë© à §¬¥à ¢ ¡ ©â å
* edx = 㪠§ â¥«ì ­  㦥 ¢ë¤¥«¥­­ë© ¡«®ª ¯ ¬ïâ¨
‚®§¢à é ¥¬®¥ §­ ç¥­¨¥:
* eax = 㪠§ â¥«ì ­  ¯¥à¥à á¯à¥¤¥«ñ­­ë© ¡«®ª, 0 ¯à¨ ®è¨¡ª¥
‡ ¬¥ç ­¨ï:
* <20>।¢ à¨â¥«ì­® á«¥¤ã¥â ¨­¨æ¨ «¨§¨à®¢ âì ªãçã ¯à®æ¥áá  ¢ë§®¢®¬
¯®¤ä㭪樨 11.
* ”ã­ªæ¨ï ¢ë¤¥«ï¥â 楫®¥ ç¨á«® áâà ­¨æ (4 Š¡) â ª, çâ® ä ªâ¨ç¥áª¨©
à §¬¥à ¢ë¤¥«¥­­®£® ¡«®ª  ¡®«ìè¥ ¨«¨ à ¢¥­ § ¯à®è¥­­®¬ã.
* …᫨ edx=0, â® ¢ë§®¢ ä㭪樨 íª¢¨¢ «¥­â¥­ ¢ë¤¥«¥­¨î ¯ ¬ïâ¨
¯®¤ä㭪樥© 12. ‚ ¯à®â¨¢­®¬ á«ãç ¥ ¡«®ª ¯ ¬ï⨠¯®  ¤à¥áã edx
¤®«¦¥­ ¡ëâì à ­¥¥ ¢ë¤¥«¥­ ¯®¤ä㭪樥© 12 ¨«¨
®¯¨á뢠¥¬®© ¯®¤ä㭪樥©.
* …᫨ ecx=0, â® äã­ªæ¨ï ®á¢®¡®¦¤ ¥â ¡«®ª ¯ ¬ï⨠¯®  ¤à¥áã edx ¨
¢®§¢à é ¥â 0.
* ‘®¤¥à¦¨¬®¥ ¯ ¬ï⨠¢¯«®âì ¤® ­ ¨¬¥­ì襣® ¨§ áâ à®£® ¨ ­®¢®£®
à §¬¥à®¢ á®åà ­ï¥âáï.
======================================================================
======================== ”γ­<CEB3>ζ¨ο 69 - ®β« ¤<C2A0> . =======================
======================================================================
@ -4480,9 +4505,7 @@ Architecture Software Developer's Manual, Volume 3, Appendix B);
7, 8 δγ­<CEB3>樨 21)
* 2 = δγ­<CEB3>ζ¨ο ­¥ ―®¤¤¥ΰ¦¨Ά ¥βαο ¤«ο ¤ ­­®© δ ©«®Ά®© α¨α⥬λ
* 3 = ­¥¨§Ά¥αβ­ ο δ ©«®Ά ο α¨α⥬ 
* 4 = ¢®§¢à é ¥âáï ⮫쪮 ä㭪樥© rename ¯à¨ ¯¥à¥¤ ç¥ ᨫ쭮
­¥¢¥à­®£® ¯ à ¬¥âà  ¨ ­¨ª ª ­¥ ᮮ⢥âáâ¢ã¥â ®¯¨á ­¨î
¢ ¨á室­¨ª å ï¤à  "partition not defined at hd"
* 4 = § à¥§¥à¢¨à®¢ ­®, ­¨ª®£¤  ­¥ ¢®§¢à é ¥âáï ¢ ⥪ã饩 ॠ«¨§ æ¨¨
* 5 = δ ©« ­¥ ­ ©¤¥­
* 6 = δ ©« § <C2A7>®­η¨«αο
* 7 = γ<> § β¥«μ Ά­¥ ― ¬οβ¨ ―ਫ®¦¥­¨ο

33
kernel/trunk/docs/sysfuncs.txt
View File

@ -3285,7 +3285,7 @@ Remarks:
============== Function 63 - work with the debug board. ==============
======================================================================
The debug board is the global system buffer (with the size
512 bytes), to which any program can write (generally speaking,
4096 bytes), to which any program can write (generally speaking,
arbitrary) data and from which other program can read these data.
By the agreement written data are text strings interpreted as
debug messages on a course of program execution. The kernel in
@ -3615,7 +3615,8 @@ Returned value:
* eax = 1 - success
* eax = 0 - failed
Remarks:
* The memory block must have been allocated by subfunction 12.
* The memory block must have been allocated by subfunction 12
or subfunction 20.
======================================================================
======== Function 68, subfunction 14 - wait for driver notify. =======
@ -3705,6 +3706,29 @@ Remarks:
by zero. The first dword in structure points to function name,
the second dword contains address of function.
======================================================================
======= Function 68, subfunction 20 - reallocate memory block. =======
======================================================================
Parameters:
* eax = 68 - function number
* ebx = 20 - subfunction number
* ecx = new size in bytes
* edx = pointer to already allocated block
Returned value:
* eax = pointer to the reallocated block, 0 = error
Remarks:
* Before this call one must initialize process heap by call to
subfunction 11.
* The function allocates an integer number of pages (4 Kb) in such
way that the real size of allocated block is more than or equal to
requested size.
* If edx=0, the function call is equivalent to memory allocation
with subfunction 12. Otherwise the block at edx
must be allocated earlier with subfunction 12 or this subfunction.
* If ecx=0, the function frees memory block at edx and returns 0.
* The contents of the block are unchanged up to the shorter of
the new and old sizes.
======================================================================
====================== Fucntion 69 - debugging. ======================
======================================================================
@ -4435,10 +4459,7 @@ Codes of events:
(by subfunctions 7, 8 of function 21)
* 2 = function is not supported for the given file system
* 3 = unknown file system
* 4 = is returned only from function 'rename' by transmission of
the strongly incorrect parameter and in any way does not
correspond to the description in the kernel sources
"partition not defined at hd"
* 4 = reserved, is never returned in the current implementation
* 5 = file not found
* 6 = end of file, EOF
* 7 = pointer lies outside of application memory