40 lines
550 B
ArmAsm
40 lines
550 B
ArmAsm
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#include "syscall.h"
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.sect .text; .sect .rom; .sect .data; .sect .bss; .sect .text
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.define _sbrk,_brk
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_sbrk:
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move.l 4(sp),d0
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add.l #3,d0
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move.l #~3,d1
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and.l d1,d0
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move.l d0,a0
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move.l curbrk,d0
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add.l #3,d0
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and.l d1,d0
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move.l d0,curbrk
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add.l d0,a0
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move.l a0,4(sp)
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pea 17 ! not SYS_sbrk
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trap #0
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bcs 1f
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move.l curbrk,d0
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move.l 4(sp),curbrk
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rts
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1:
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jmp cerror
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_brk:
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move.l 4(sp),d0
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add.l #3,d0
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move.l #~3,d1
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and.l d1,d0
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move.l d0,4(sp)
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pea 17
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trap #0
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bcs 1b
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move.l 4(sp),curbrk
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clr.l d0
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rts
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.sect .data
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curbrk: .data4 endbss
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