fasm: dynamic memory allocation

git-svn-id: svn://kolibrios.org@635 a494cfbc-eb01-0410-851d-a64ba20cac60

programs/develop/fasm/trunk/fasm.asm

@@ -27,8 +27,8 @@ use32
   dd 0x01        ; header version
   dd START       ; program start
   dd program_end ; program image size
-  dd APP_MEMORY  ; required amount of memory
-  dd 0xDFFF0     ; stack
+  dd stacktop    ; required amount of memory
+  dd stacktop    ; stack
   dd params,0x0  ; parameters,icon
 
 include 'lang.inc'
@@ -593,3 +593,7 @@ max_handles = 8
 fileinfos rb (4+20+MAX_PATH)*max_handles
 fileinfos_end:
 pinfo process_information
+
+align 1000h
+rb 1000h
+stacktop:

programs/develop/fasm/trunk/system.inc

@@ -58,15 +58,29 @@ filepos 	 dd 0x0
 ;   ~3/8 - additional memory
 ;   ~5/8 - main memory
 init_memory:
-	mov	[memory_start],0x100000
-	mov	[memory_end],0x100000+(APP_MEMORY-0x100000)/8*5
-	mov	[additional_memory],0x100000+(APP_MEMORY-0x100000)/8*5
-	mov	[additional_memory_end],APP_MEMORY
+	mcall	18, 16
+	cmp	eax, 0xFFFFFFFF shr 9
+	jbe	@f
+	mov	eax, 0xFFFFFFFF shr 9
+@@:
+	shl	eax, 9
+	lea	ecx, [eax+stacktop]
+	mcall	64, 1
+	mov	[memory_start], stacktop
+	mov	[additional_memory_end], ecx
+	sub	ecx, stacktop
+	shr	ecx, 3
+	lea	ecx, [ecx*5+stacktop]
+	mov	[memory_end],ecx
+	mov	[additional_memory],ecx
 	ret
 
 exit_program:
 	cmp	[_mode],NORMAL_MODE
-	je	still
+	jne	@f
+	mcall	64, 1, stacktop
+	jmp	still
+@@:
 	or	eax,-1
 	mcall