infinity: remove direct access to kernel data

git-svn-id: svn://kolibrios.org@520 a494cfbc-eb01-0410-851d-a64ba20cac60

kernel/trunk/core/exports.inc

@@ -39,7 +39,9 @@ iglobal
   szUserFree          db 'UserFree',0
   szKmalloc           db 'Kmalloc',0
   szKfree             db 'Kfree',0
+  szCreateRingBuffer  db 'CreateRingBuffer',0
 
+  szGetPid            db 'GetPid',0
   szCreateObject      db 'CreateObject',0
   szDestroyObject     db 'DestroyObject',0
   szCreateEvent       db 'CreateEvent',0
@@ -101,7 +103,9 @@ kernel_export:
   dd szUserFree        , user_free
   dd szKmalloc         , malloc
   dd szKfree           , free
+  dd szCreateRingBuffer, create_ring_buffer
 
+  dd szGetPid          , get_pid
   dd szCreateObject    , create_kernel_object
   dd szDestroyObject   , destroy_kernel_object
   dd szCreateEvent     , create_event

kernel/trunk/core/memory.inc

@@ -1085,6 +1085,58 @@ proc stall stdcall, delay:dword
            ret
 endp
 
+align 4
+proc create_ring_buffer stdcall, size:dword, flags:dword
+           locals
+             buf_ptr  dd ?
+           endl
+
+           mov eax, [size]
+           test eax, eax
+           jz .fail
+
+           add eax, eax
+           stdcall alloc_kernel_space, eax
+           test eax, eax
+           jz .fail
+
+           mov [buf_ptr], eax
+
+           mov ebx, [size]
+           shr ebx, 12
+           push ebx
+
+           stdcall alloc_pages, ebx
+           pop ecx
+
+           test eax, eax
+           jz .mm_fail
+
+           or eax, [flags]
+           mov edi, [buf_ptr]
+           mov ebx, [buf_ptr]
+           mov edx, ecx
+           shl edx, 2  
+           shr edi, 10
+@@:
+           mov [page_tabs+edi], eax
+           mov [page_tabs+edi+edx], eax
+           invlpg [ebx]
+           invlpg [ebx+esi]
+           add eax, 0x1000
+           add ebx, 0x1000
+           add edi, 4 
+           dec ecx
+           jnz @B
+
+           mov eax, [buf_ptr]
+           ret
+.mm_fail:
+           stdcall free_kernel_space, [buf_ptr]
+           xor eax, eax
+.fail:
+           ret
+endp
 
 if 0
      push eax

kernel/trunk/core/taskman.inc

@@ -544,6 +544,12 @@ proc destroy_app_space stdcall, pg_dir:dword
            ret
 endp
 
+align 4
+get_pid:
+           mov eax, [TASK_DATA]
+           mov eax, [eax+4]
+           ret
+
 pid_to_slot:
 ;Input:
 ;  eax - pid of process

kernel/trunk/drivers/imports.inc

@@ -88,7 +88,13 @@ end if
 if used Kfree
   extrn Kfree
 end if
+if used CreateRingBuffer
+  extrn CreateRingBuffer
+end if
 
+if used GetPid
+  extrn GetPid
+end if
 if used CreateObject
   extrn CreateObject
 end if

kernel/trunk/drivers/infinity.asm

@@ -15,7 +15,10 @@ SOUND_VERSION  equ   API_VERSION
 
 
 include 'proc32.inc'
+
+;include 'system.inc'
 include 'main.inc'
+
 include 'imports.inc'
 
 FORCE_MMX         equ 0  ;set to 1 to force use mmx or
@@ -27,9 +30,6 @@ DEBUG             equ 1
 
 
 OS_BASE           equ 0x80000000
-SLOT_BASE         equ (OS_BASE+0x0080000)
-TASK_COUNT        equ (OS_BASE+0x0003004)
-CURRENT_TASK      equ (OS_BASE+0x0003000)
 
 CAPS_SSE2         equ 26
 PG_SW             equ 0x003
@@ -334,9 +334,9 @@ proc CreateBuffer stdcall, format:dword, size:dword
            test eax, PCM_OUT+PCM_STATIC
            jnz .fail
 .test_ok:
-           mov ebx, [CURRENT_TASK]      ;hack: direct accsess
-           shl ebx, 5                   ;to kernel data
-           mov ebx, [CURRENT_TASK+ebx+4]
+
+           call GetPid
+           mov ebx, eax
            mov eax, STREAM_SIZE
 
            call CreateObject
@@ -390,9 +390,11 @@ proc CreateBuffer stdcall, format:dword, size:dword
            shr ebx, 12
            mov [ring_pages], ebx
 
-           add eax, eax              ;double ring size
-           stdcall AllocKernelSpace, eax
+           stdcall CreateRingBuffer, eax, PG_SW
 
+if 0
+           stdcall AllocKernelSpace, eax
+end if
            mov edi, [str]
            mov ecx, [ring_size]
            mov [edi+STREAM.in_base], eax
@@ -407,6 +409,7 @@ proc CreateBuffer stdcall, format:dword, size:dword
            add eax, ecx
            mov [edi+STREAM.in_top], eax
 
+if 0
            mov ebx, [ring_pages]
            stdcall AllocPages, ebx
            mov edi, [str]
@@ -421,7 +424,7 @@ proc CreateBuffer stdcall, format:dword, size:dword
            pop eax
            add ebx, [ring_size]
            call CommitPages    ;double mapped
-
+end if
            jmp .out_buff
 .static:
            mov ecx, [size]

kernel/trunk/fs/fs_lfn.inc

@@ -107,6 +107,7 @@ file_system_lfn:
 		stdcall kernel_alloc, 200
                 mov     edx,eax
                 pop     eax
+
 		push	edx
 		push	end_of_file_system_lfn
                 mov     ebx,edx
@@ -146,9 +147,6 @@ file_system_lfn:
 
 
 
-		
-
-
    ;     add     eax, std_application_base_address
 ; parse file name
         xchg    ebx, eax