42 lines
615 B
ArmAsm
42 lines
615 B
ArmAsm
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! $Source$
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! $State$
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! $Revision$
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.sect .text; .sect .rom; .sect .data; .sect .bss
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.sect .text
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.define .strhp
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.extern .reghp, .limhp, EHEAP, .trp
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! Updates the heap pointer:
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!
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! int .strhp(void* newpointer)
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!
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! .reghp is the current heap pointer;
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! .limhp is the current top of memory.
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!
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! If the desired new heap pointer is above the top of memory, then BRK is
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! called to extend the memory.
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.strhp:
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pop bx
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pop ax
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mov (.reghp),ax
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cmp ax,(.limhp)
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jb 1f
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add ax,02000
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and ax,~0777
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push bx
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push ax
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call BRK
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pop cx
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pop bx
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cmp ax,-1
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je 2f
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1:
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mov (.limhp),cx
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jmp bx
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2:
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mov ax,EHEAP
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push bx
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jmp .trp
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