40 lines
446 B
ArmAsm
40 lines
446 B
ArmAsm
.sect .text; .sect .rom; .sect .data; .sect .bss; .sect .text
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.define _brk
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.define xbrk
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.define np
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.extern _brk
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.extern xbrk
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.extern np, cerror
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_brk:
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mov bx,sp
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mov ax,2(bx)
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mov cx,sp
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sub cx,128
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jbe 1f
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mov bx,(np)
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mov (np),ax
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sub ax,bx
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jbe 2f
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call xbrk
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2:
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xor ax,ax
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ret
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1:
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mov ax,0xc
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jmp cerror
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xbrk:
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push di
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mov di,bx
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mov cx,ax
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xor ax,ax
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shr cx,1
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repz stos
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jae 3f
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stosb
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3:
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pop di
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ret
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.sect .data
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np: .data2 0
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.sect .text
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