30 lines
353 B
ArmAsm
30 lines
353 B
ArmAsm
#include "syscall.h"
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.extern _end
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DEFINE(_brk)
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cmpl 4(ap),Imin
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bgeq Iok
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movl Imin,4(ap)
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Iok:
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chmk $17
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bcs Ierr
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movl 4(ap),Icur
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clrl r0
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ret
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Ierr:
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jmp cerror
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DEFINE(_sbrk)
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addl3 Icur,4(ap),-(sp)
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bcs Ierr
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pushl $1
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movl ap,r3
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movl sp,ap
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chmk $17
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bcs Ierr
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movl Icur,r0
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addl2 4(r3),Icur
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ret
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.sect .data
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Imin: .data4 _end
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Icur: .data4 _end
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